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1

Anion Exchange Membranes - Transport/Conductivity  

NLE Websites -- All DOE Office Websites (Extended Search)

Fundamental understanding Fundamental understanding * Driving membranes towards applications Anion Exchange Membranes - Transport/Conductivity High Priority * A need for a standard/available AEM (similar to Nafion in PEMs) * Define standard experimental conditions and protocols * A need for much more fundamental studies in transport mechanisms and mechanical properties * A need to develop much more new AEMs with alternative chemistries (new cation and backbone chemistries) Fundamental Studies * TRANSPORT * Conductivity (pure OH - hard to measure) * Water content, λ * Diffusion coefficients, NMR * Drag coefficients * Transference * Solubility * Fundamental transport mechanisms for anion and water transport * Computational Modeling * MORPHOLOGY/CHEMISTRY * Vibrational Spectroscopy: FTIR, Raman

2

TRANSPORT INVOLVING CONDUCTING FIBERS IN A NON-CONDUCTING MATRIX  

E-Print Network (OSTI)

result is a material with high electrical conductivity and low thermal conductivity. Transport Models,2 , J. Rozen3 Introduction Thermal and electrical transport through a low-conductivity matrix containing conversion devices high electrical conductivity and low thermal conductivity are preferred for superior

Walker, D. Greg

3

Transport involving conducting fibers in a non-conducting matrix R. A. Hansela  

E-Print Network (OSTI)

result is a material with high electrical conduc- tivity and low thermal conductivity. If we consider, conducting fibers, thin-film devices 1. Introduction Thermal and electrical transport through a low to predict conductance of the combined system. However, if the two materials are similar in conductivity

Walker, D. Greg

4

Oxygen Transport Studies in Nanocrystalline Ceria Films. | EMSL  

NLE Websites -- All DOE Office Websites (Extended Search)

Transport Studies in Nanocrystalline Ceria Films. Oxygen Transport Studies in Nanocrystalline Ceria Films. Abstract: Oxygen uptake and conductivity were measured by nuclear...

5

Graduate Studies Transportation Systems Engineering  

E-Print Network (OSTI)

Graduate Studies Transportation Systems Engineering TRANSPORTATION SYSTEMS The transportation that transportation systems engineering can promote a thriving economy and a better quality of life by ensuring that transportation systems themselves affect the environment through operations, construction, and maintenance

Jacobs, Laurence J.

6

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

The Advanced Cuttings Transport Study (ACTS) was a 5-year JIP project undertaken at the University of Tulsa (TU). The project was sponsored by the U.S. Department of Energy (DOE) and JIP member companies. The objectives of the project were: (1) to develop and construct a new research facility that would allow three-phase (gas, liquid and cuttings) flow experiments under ambient and EPET (elevated pressure and temperature) conditions, and at different angle of inclinations and drill pipe rotation speeds; (2) to conduct experiments and develop a data base for the industry and academia; and (3) to develop mechanistic models for optimization of drilling hydraulics and cuttings transport. This project consisted of research studies, flow loop construction and instrumentation development. Following a one-year period for basic flow loop construction, a proposal was submitted by TU to the DOE for a five-year project that was organized in such a manner as to provide a logical progression of research experiments as well as additions to the basic flow loop. The flow loop additions and improvements included: (1) elevated temperature capability; (2) two-phase (gas and liquid, foam etc.) capability; (3) cuttings injection and removal system; (4) drill pipe rotation system; and (5) drilling section elevation system. In parallel with the flow loop construction, hydraulics and cuttings transport studies were preformed using drilling foams and aerated muds. In addition, hydraulics and rheology of synthetic drilling fluids were investigated. The studies were performed under ambient and EPET conditions. The effects of temperature and pressure on the hydraulics and cuttings transport were investigated. Mechanistic models were developed to predict frictional pressure loss and cuttings transport in horizontal and near-horizontal configurations. Model predictions were compared with the measured data. Predominantly, model predictions show satisfactory agreements with the measured data. As a part of this project, instrumentation was developed to monitor cuttings beds and characterize foams in the flow loop. An ultrasonic-based monitoring system was developed to measure cuttings bed thickness in the flow loop. Data acquisition software controls the system and processes the data. Two foam generating devices were designed and developed to produce foams with specified quality and texture. The devices are equipped with a bubble recognition system and an in-line viscometer to measure bubble size distribution and foam rheology, respectively. The 5-year project is completed. Future research activities will be under the umbrella of Tulsa University Drilling Research Projects. Currently the flow loop is being used for testing cuttings transport capacity of aqueous and polymer-based foams under elevated pressure and temperature conditions. Subsequently, the effect of viscous sweeps on cuttings transport under elevated pressure and temperature conditions will be investigated using the flow loop. Other projects will follow now that the ''steady state'' phase of the project has been achieved.

Stefan Miska; Troy Reed; Ergun Kuru

2004-09-30T23:59:59.000Z

7

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

ACTS flow loop is now operational under elevated pressure and temperature. Currently, experiments with synthetic based drilling fluids under pressure and temperature are being conducted. Based on the analysis of Fann 70 data, empirical correlations defining the shear stress as a function of temperature, pressure and the shear rate have been developed for Petrobras synthetic drilling fluids. PVT equipment has been modified for testing Synthetic oil base drilling fluids. PVT tests with Petrobras Synthetic base mud have been conducted and results are being analyzed Foam flow experiments have been conducted and the analysis of the data has been carried out to characterize the rheology of the foam. Comparison of pressure loss prediction from the available foam hydraulic models and the test results has been made. Cuttings transport experiments in horizontal annulus section have been conducted using air, water and cuttings. Currently, cuttings transport tests in inclined test section are being conducted. Foam PVT analysis tests have been conducted. Foam stability experiments have also been conducted. Effects of salt and oil concentration on the foam stability have been investigated. Design of ACTS flow loop modification for foam and aerated mud flow has been completed. A flow loop operation procedure for conducting foam flow experiments under EPET conditions has been prepared Design of the lab-scale flow loop for dynamic foam characterization and cuttings monitoring instrumentation tests has been completed. The construction of the test loop is underway. As part of the technology transport efforts, Advisory Board Meeting with ACTS-JIP industry members has been organized on May 13, 2000.

Ergun Kuru; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Mark Pickell; Len Volk; Mike Volk; Barkim Demirdal; Affonso Lourenco; Evren Ozbayoglu; Paco Vieira; Neelima Godugu

2000-07-30T23:59:59.000Z

8

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

ACTS flow loop is now operational under elevated pressure and temperature. Currently, experiments with water under pressure and temperature are being conducted. Based on the analysis of Fann 70 data, empirical correlations defining the shear stress as a function of temperature, pressure and the shear rate have been developed for Petrobras synthetic drilling fluids. PVT equipment has been modified for testing Synthetic drilling fluids. Initial calibration tests have been conducted by using water. Currently, the base oil of the Petrobras synthetic drilling fluid is being tested. Foam flow experiments have been conducted. Currently, more experiments are being conducted while data are being analyzed to characterize the rheology of the foam. Cuttings transport experiments have been conducted using air, water and cuttings. Preliminary results have shown that it may not be possible to avoid cuttings bed deposition under any practical combination of air and water flow rates. Foam stability analyses have been conducted. Effects of salt and oil concentration on the foam stability have been investigated. A software for controlling the data sampling and data storage during cuttings monitoring process have been developed.

Ergun Kuru; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Len Volk; Mark Pickell; Mike Volk; Barkim Demirdal; Affonso Lourenco; Evren Ozbayoglu; Paco Vieira; Neelima Godugu; Sri Suresh Kumar Thiroveedhula

2000-04-30T23:59:59.000Z

9

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This report includes a review of the progress made in ACTF Flow Loop development and research during 90 days pre-award period (May 15-July 14, 1999) and the following three months after the project approval date (July15-October 15, 1999) The report presents information on the following specific subjects; (a) Progress in Advanced Cuttings Transport Facility design and development, (b) Progress report on the research project ''Study of Flow of Synthetic Drilling Fluids Under Elevated Pressure and Temperature Conditions'', (c) Progress report on the research project ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (d) Progress report on the research project ''Study of Cuttings Transport with Aerated Muds Under LPAT Conditions (Joint Project with TUDRP)'', (e) Progress report on the research project ''Study of Foam Flow Behavior Under EPET Conditions'', (f) Progress report on the instrumentation tasks (Tasks 11 and 12) (g) Activities towards technology transfer and developing contacts with oil and service company members.

Ergun Kuru; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Len Volk; Mark Pickell; Evren Ozbayoglu; Barkim Demirdal; Paco Vieira; Affonso Lourenco

1999-10-15T23:59:59.000Z

10

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This is the second quarterly progress report for Year 2 of the ACTS project. It includes a review of progress made in Flow Loop development and research during the period of time between Oct 1, 2000 and December 31, 2000. This report presents a review of progress on the following specific tasks: (a) Design and development of an Advanced Cuttings Transport Facility (Task 2: Addition of a foam generation and breaker system), (b) Research project (Task 6): ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (c) Research project (Task 7): ''Study of Cuttings Transport with Aerated Muds Under LPAT Conditions (Joint Project with TUDRP)'', (d) Research project (Task 8): ''Study of Flow of Synthetic Drilling Fluids Under Elevated Pressure and Temperature Conditions'', (e) Research project (Task 9): ''Study of Foam Flow Behavior Under EPET Conditions'', (f) Research project (Task 10): ''Study of Cuttings Transport with Aerated Mud Under Elevated Pressure and Temperature Conditions'', (g) Research on instrumentation tasks to measure: Cuttings concentration and distribution in a flowing slurry (Task 11), and Foam properties while transporting cuttings. (Task 12), (h) Development of a Safety program for the ACTS Flow Loop. Progress on a comprehensive safety review of all flow-loop components and operational procedures. (Task 1S). (i) Activities towards technology transfer and developing contacts with Petroleum and service company members, and increasing the number of JIP members. The tasks Completed During This Quarter are Task 7 and Task 8.

Troy Reed; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Mark Pickell; Len Volk; Mike Volk; Barkim Demirdal; Affonso Lourenco; Evren Ozbayoglu; Paco Vieira; Lei Zhou

2000-01-30T23:59:59.000Z

11

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

The Quarter began with installing the new drill pipe, hooking up the new hydraulic power unit, completing the pipe rotation system (Task 4 has been completed), and making the SWACO choke operational. Detailed design and procurement work is proceeding on a system to elevate the drill-string section. The prototype Foam Generator Cell has been completed by Temco and delivered. Work is currently underway to calibrate the system. Literature review and preliminary model development for cuttings transportation with polymer foam under EPET conditions are in progress. Preparations for preliminary cuttings transport experiments with polymer foam have been completed. Two nuclear densitometers were re-calibrated. Drill pipe rotation system was tested up to 250 RPM. Water flow tests were conducted while rotating the drill pipe up to 100 RPM. The accuracy of weight measurements for cuttings in the annulus was evaluated. Additional modifications of the cuttings collection system are being considered in order to obtain the desired accurate measurement of cuttings weight in the annular test section. Cutting transport experiments with aerated fluids are being conducted at EPET, and analyses of the collected data are in progress. The printed circuit board is functioning with acceptable noise level to measure cuttings concentration at static condition using ultrasonic method. We were able to conduct several tests using a standard low pass filter to eliminate high frequency noise. We tested to verify that we can distinguish between different depths of sand in a static bed of sand. We tested with water, air and a mix of the two mediums. Major modifications to the DTF have almost been completed. A stop-flow cell is being designed for the DTF, the ACTF and Foam Generator/Viscometer which will allow us to capture bubble images without the need for ultra fast shutter speeds or microsecond flash system.

Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Mengjiao Yu; Ramadan Ahmed; Mark Pickell; Len Volk; Lei Zhou; Zhu Chen; Aimee Washington; Crystal Redden

2003-09-30T23:59:59.000Z

12

Water Transport Exploratory Studies  

NLE Websites -- All DOE Office Websites (Extended Search)

Exploratory Studies Exploratory Studies Office of Hydrogen, Fuel Cells, and Infrastructure Technologies 2007 kickoff meeting February 13-14, 2007 DOE Forrestal Building Rod Borup Mukundan Rangachary, Bryan Pivovar, Yu Seung Kim, John Davey, David Wood, Tom Springer, Muhammad Arif , Ken Chen, Simon Cleghorn, Will Johnson, Karren More, Peter Wilde, Tom Zawodzinski Los Alamos National Lab This presentation does not contain any proprietary or confidential information Objectives * Develop understanding of water transport in PEM Fuel Cells (non-design-specific) * Evaluate structural and surface properties of materials affecting water transport and performance * Develop (enable) new components and operating methods * Accurately model water transport within the fuel cell * Develop a better understanding of the effects of

13

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This is the first quarterly progress report for Year 2 of the ACTS project. It includes a review of progress made in Flow Loop development and research during the period of time between July 14, 2000 and September 30, 2000. This report presents information on the following specific tasks: (a) Progress in Advanced Cuttings Transport Facility design and development (Task 2), (b) Progress on research project (Task 8): ''Study of Flow of Synthetic Drilling Fluids Under Elevated Pressure and Temperature Conditions'', (c) Progress on research project (Task 6): ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (d) Progress on research project (Task 7): ''Study of Cuttings Transport with Aerated Muds Under LPAT Conditions (Joint Project with TUDRP)'', (e) Progress on research project (Task 9): ''Study of Foam Flow Behavior Under EPET Conditions'', (f) Initiate research on project (Task 10): ''Study of Cuttings Transport with Aerated Mud Under Elevated Pressure and Temperature Conditions'', (g) Progress on instrumentation tasks to measure: Cuttings concentration and distribution (Tasks 11), and Foam properties (Task 12), (h) Initiate a comprehensive safety review of all flow-loop components and operational procedures. Since the previous Task 1 has been completed, we will now designate this new task as: (Task 1S). (i) Activities towards technology transfer and developing contacts with Petroleum and service company members, and increasing the number of JIP members.

Troy Reed; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Mark Pickell; Len Volk; Mike Volk; Barkim Demirdal; Affonso Lourenco; Evren Ozbayoglu; Paco Vieira

2000-10-30T23:59:59.000Z

14

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This is the second quarterly progress report for Year 3 of the ACTS project. It includes a review of progress made in: (1) Flow Loop development and (2) research tasks during the period of time between Oct 1, 2001 and Dec. 31, 2001. This report presents a review of progress on the following specific tasks: (a) Design and development of an Advanced Cuttings Transport Facility (Task 3: Addition of a Cuttings Injection/Collection System), (b) Research project (Task 6): ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (c) Research project (Task 9): ''Study of Foam Flow Behavior Under EPET Conditions'', (d) Research project (Task 10): ''Study of Cuttings Transport with Aerated Mud Under Elevated Pressure and Temperature Conditions'', (e) Research on instrumentation tasks to measure: Cuttings concentration and distribution in a flowing slurry (Task 11), and Foam properties while transporting cuttings. (Task 12), (f) Development of a Safety program for the ACTS Flow Loop. Progress on a comprehensive safety review of all flow-loop components and operational procedures. (Task 1S). (g) Activities towards technology transfer and developing contacts with Petroleum and service company members, and increasing the number of JIP members.

Troy Reed; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Gerald Kane; Mark Pickell; Len Volk; Mike Volk; Affonso Lourenco; Evren Ozbayoglu; Lei Zhou

2002-01-30T23:59:59.000Z

15

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This is the third quarterly progress report for Year 3 of the ACTS Project. It includes a review of progress made in: (1) Flow Loop construction and development and (2) research tasks during the period of time between Jan. 1, 2002 and Mar. 31, 2002. This report presents a review of progress on the following specific tasks: (a) Design and development of an Advanced Cuttings Transport Facility (Task 3: Addition of a Cuttings Injection/Separation System), (b) Research project (Task 6): ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)'', (c) Research project (Task 9b): ''Study of Foam Flow Behavior Under EPET Conditions'', (d) Research project (Task 10): ''Study of Cuttings Transport with Aerated Mud Under Elevated Pressure and Temperature Conditions'', (e) Research on three instrumentation tasks to measure: Cuttings concentration and distribution in a flowing slurry (Task 11), Foam texture while transporting cuttings. (Task 12), and Viscosity of Foam under EPET (Task 9b); (f) Development of a Safety program for the ACTS Flow Loop, progress on a comprehensive safety review of all flow-loop components and operational procedures. (Task 1S); and (g) Activities towards technology transfer and developing contacts with Petroleum and service company members, and increasing the number of JIP members.

Troy Reed; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Mark Pickell; Len Volk; Mike Volk; Evren Ozbayoglu; Lei Zhou

2002-04-30T23:59:59.000Z

16

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

This is the fourth quarterly progress report for Year-3 of the ACTS Project. It includes a review of progress made in: (1) Flow Loop construction and development and (2) research tasks during the period of time between April 1, 2002 and June 30, 2002. This report presents a review of progress on the following specific tasks: (a) Design and development of an Advanced Cuttings Transport Facility (Task 3: Addition of a Cuttings Injection/Separation System), (b) Research project (Task 6): ''Study of Cuttings Transport with Foam Under LPAT Conditions (Joint Project with TUDRP)''; (c) Research project (Task 9b): ''Study of Foam Flow Behavior Under EPET Conditions''; (d) Research project (Task 10): ''Study of Cuttings Transport with Aerated Mud Under Elevated Pressure and Temperature Conditions''; (e) Research on three instrumentation tasks to measure: Cuttings concentration and distribution in a flowing slurry (Task 11), Foam texture while transporting cuttings. (Task 12), and Viscosity of Foam under EPET (Task 9b); (f) Development of a Safety program for the ACTS Flow Loop. Progress on a comprehensive safety review of all flow-loop components and operational procedures. (Task 1S); (g) Activities towards technology transfer and developing contacts with Petroleum and service company members, and increasing the number of JIP members.

Troy Reed; Stefan Miska; Nicholas Takach; Kaveh Ashenayi; Mark Pickell; Len Volk; Mike Volk; Evren Ozbayoglu; Lei Zhou

2002-07-30T23:59:59.000Z

17

ADVANCED CUTTINGS TRANSPORT STUDY  

SciTech Connect

Final design of the mast was completed (Task 5). The mast is consisting of two welded plate girders, set next to each other, and spaced 14-inches apart. Fabrication of the boom will be completed in two parts solely for ease of transportation. The end pivot connection will be made through a single 2-inch diameter x 4 feet-8 inch long 316 SS bar. During installation, hard piping make-ups using Chiksan joints will connect the annular section and 4-inch return line to allow full movement of the mast from horizontal to vertical. Additionally, flexible hoses and piping will be installed to isolate both towers from piping loads and allow recycling operations respectively. Calibration of the prototype Foam Generator Cell has been completed and experiments are now being conducted. We were able to generate up to 95% quality foam. Work is currently underway to attach the Thermo-Haake RS300 viscometer and install a view port with a microscope to measure foam bubble size and bubble size distribution. Foam rheology tests (Task 13) were carried out to evaluate the rheological properties of the proposed foam formulation. After successful completion of the first foam test, two sets of rheological tests were conducted at different foam flow rates while keeping other parameters constant (100 psig, 70F, 80% quality). The results from these tests are generally in agreement with the previous foam tests done previously during Task 9. However, an unanticipated observation during these tests was that in both cases, the frictional pressure drop in 2 inch pipe was lower than that in the 3 inch and 4 inch pipes. We also conducted the first foam cuttings transport test during this quarter. Experiments on aerated fluids without cuttings have been completed in ACTF (Task 10). Gas and liquid were injected at different flow rates. Two different sets of experiments were carried out, where the only difference was the temperature. Another set of tests was performed, which covered a wide range of pressure and temperature. Several parameters were measured during these tests including differential pressure and mixture density in the annulus. Flow patterns during the aerated fluids test have been observed through the view port in the annulus and recorded by a video camera. Most of the flow patterns were slug flow. Further increase in gas flow rate changed the wavy flow pattern to slug flow. At this stage, all of the planned cuttings transport tests have been completed. The results clearly show that temperature significantly affects the cuttings transport efficiency of aerated muds, in addition to the liquid flow rate and gas liquid ratio (GLR). Since the printed circuit board is functioning (Task 11) with acceptable noise level we were able to conduct several tests. We used the newly designed pipe test section to conduct tests. We tested to verify that we can distinguish between different depths of sand in a static bed of sand in the pipe section. The results indicated that we can distinguish between different sand levels. We tested with water, air and a mix of the two mediums. Major modifications (installation of magnetic flow meter, pipe fittings and pipelines) to the dynamic bubble characterization facility (DTF, Task 12) were completed. An Excel program that allows obtaining the desired foam quality in DTF was developed. The program predicts the foam quality by recording the time it takes to pressurize the loop with nitrogen.

Stefan Miska; Nicholas Takach; Kaveh Ashenayi

2004-01-31T23:59:59.000Z

18

Transportation Systems Engineering GRADUATE STUDIES  

E-Print Network (OSTI)

Transportation Systems Engineering GRADUATE STUDIES TRANSPORTATION SYSTEMS are the building blocks and provides for an improved quality of life. However, transportation systems by their very nature also affect the environment through physical construction and operation of transportation facilities, and through the travel

Wang, Yuhang

19

Understanding and engineering ion transport in conducting polymers.  

E-Print Network (OSTI)

??Many organic electronic and bioelectronics devices rely on mixed (electronic and ionic) transport within a single organic layer. Although electronic transport in these materials is (more)

Stavrinidou, Eleni

2013-01-01T23:59:59.000Z

20

Regional Transportation Coordination Study  

E-Print Network (OSTI)

.......................................................................................................... 6-1 Option to Increase Motor Vehicle Registration Fee .................................................................... 6-2 Transportation Development Credits... identified except for inefficiencies in rural vehicles sitting idle waiting for passengers. Gaps in service identified included employee access to work and a lack of rural/urban evening and weekend service. Along with assessing the current service level...

Golden Crescent Regional Planning Commission

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

The Impact of Thermal Conductivity and Diffusion Rates on Water Vapor Transport through Gas Diffusion Layers  

E-Print Network (OSTI)

Water management in a hydrogen polymer electrolyte membrane (PEM) fuel cell is critical for performance. The impact of thermal conductivity and water vapor diffusion coefficients in a gas diffusion layer (GDL) has been studied by a mathematical model. The fraction of product water that is removed in the vapour phase through the GDL as a function of GDL properties and operating conditions has been calculated and discussed. Furthermore, the current model enables identification of conditions when condensation occurs in each GDL component and calculation of temperature gradient across the interface between different layers, providing insight into the overall mechanism of water transport in a given cell design. Water transport mode and condensation conditions in the GDL components depend on the combination of water vapor diffusion coefficients and thermal conductivities of the GDL components. Different types of GDL and water removal scenarios have been identified and related to experimentally-determined GDL proper...

Burlatsky, S F; Gummallaa, M; Condita, D; Liua, F

2013-01-01T23:59:59.000Z

22

Proton Conductivity Studies on Biopolymer Electrolytes  

SciTech Connect

Proton conducting solid biopolymer electrolyte membranes consisting of methyl cellulose (MC) and different wt.% of ammonium nitrate (NH{sub 4}NO{sub 3}) were prepared by solution cast technique. Impedance spectroscopy was carried out to study electrical characteristics of bulk materials. The ionic conductivity of the prepared samples was calculated using the bulk resistance (R{sub b}) obtained from impedance spectroscopy plot. The highest ionic conductivity obtained was 1.17x10{sup -4} Scm{sup -1} for the sample with composition ratio of MC(50): NH{sub 4}NO{sub 3}(50). To enhance the ionic conductivity, propylene carbonate (PC) and ethylene carbonate (EC) plasticizers were introduced. It was found that the ionic conductivity of polymer electrolyte membranes increased with the increase in plasticizers concentration. The ionic conductivities of solid polymer electrolytes based on MC-NH{sub 4}NO{sub 3}-PC was enhanced up to 4.91x10{sup -3} Scm{sup -1} while for the MC-NH{sub 4}NO{sub 3}-EC system, the highest conductivity was 1.74x10{sup -2} Scm{sup -1}. The addition of more plasticizer however decreases in mechanical stability of the membranes.

Harun, N. I.; Sabri, N. S.; Rosli, N. H. A.; Taib, M. F. M.; Saaid, S. I. Y.; Kudin, T. I. T. [Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor (Malaysia); Ali, A. M. M.; Yahya, M. Z. A. [Faculty of Applied Sciences, Universiti Teknologi MARA, 40450 Shah Alam, Selangor (Malaysia); Institute of Science, Universiti Teknologi MARA, 40450 Shah Alam, Selangor (Malaysia)

2010-07-07T23:59:59.000Z

23

Public Works Transportation Infrastructure Study  

E-Print Network (OSTI)

and Alleys · Street Lights · Traffic Signals #12;Public Works Transportation Infrastructure Study Minneapolis Infrastructure Study Minneapolis City of Lakes Infrastructure Included in Analysis: · Bridges · Streets Infrastructure Study Minneapolis City of Lakes Existing Inventory & Current Conditions Street Pavement Before

Minnesota, University of

24

Correlating Humidity-Dependent Ionically Conductive Surface Area with Transport Phenomena in Proton-Exchange Membranes  

SciTech Connect

The objective of this effort was to correlate the local surface ionic conductance of a Nafion? 212 proton-exchange membrane with its bulk and interfacial transport properties as a function of water content. Both macroscopic and microscopic proton conductivities were investigated at different relative humidity levels, using electrochemical impedance spectroscopy and current-sensing atomic force microscopy (CSAFM). We were able to identify small ion-conducting domains that grew with humidity at the surface of the membrane. Numerical analysis of the surface ionic conductance images recorded at various relative humidity levels helped determine the fractional area of ion-conducting active sites. A simple square-root relationship between the fractional conducting area and observed interfacial mass-transport resistance was established. Furthermore, the relationship between the bulk ionic conductivity and surface ionic conductance pattern of the Nafion? membrane was examined.

He, Qinggang; Kusoglu, Ahmet; Lucas, Ivan T.; Clark, Kyle; Weber, Adam Z.; Kostecki, Robert

2011-08-01T23:59:59.000Z

25

Institute of Transportation Studies Portland State University  

E-Print Network (OSTI)

Institute of Transportation Studies Portland State University November 2007 Transit's Dirty Little Director, UCLA Institute of Transportation Studies #12;Institute of Transportation Studies Transit of Transportation Studies Fewer than 40 trips per capita since 1965 Trend in Transit Ridership Per Capita 1900

Bertini, Robert L.

26

Plan to Conduct Electric Transmission Congestion Study: Federal...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Plan to Conduct Electric Transmission Congestion Study: Federal Register Volume 76, No. 218 - Nov. 10, 2011 Plan to Conduct Electric Transmission Congestion Study: Federal Register...

27

Vadose Zone Transport Field Study: Summary Report  

SciTech Connect

From FY 2000 through FY 2003, a series of vadose zone transport field experiments were conducted as part of the U.S. Department of Energys Groundwater/Vadose Zone Integration Project Science and Technology Project, now known as the Remediation and Closure Science Project, and managed by the Pacific Northwest National Laboratory (PNNL). The series of experiments included two major field campaigns, one at a 299-E24-11 injection test site near PUREX and a second at a clastic dike site off Army Loop Road. The goals of these experiments were to improve our understanding of vadose zone transport processes; to develop data sets to validate and calibrate vadose zone flow and transport models; and to identify advanced monitoring techniques useful for evaluating flow-and-transport mechanisms and delineating contaminant plumes in the vadose zone at the Hanford Site. This report summarizes the key findings from the field studies and demonstrates how data collected from these studies are being used to improve conceptual models and develop numerical models of flow and transport in Hanfords vadose zone. Results of these tests have led to a better understanding of the vadose zone. Fine-scale geologic heterogeneities, including grain fabric and lamination, were observed to have a strong effect on the large-scale behavior of contaminant plumes, primarily through increased lateral spreading resulting from anisotropy. Conceptual models have been updated to include lateral spreading and numerical models of unsaturated flow and transport have revised accordingly. A new robust model based on the concept of a connectivity tensor was developed to describe saturation-dependent anisotropy in strongly heterogeneous soils and has been incorporated into PNNLs Subsurface Transport Over Multiple Phases (STOMP) simulator. Application to field-scale transport problems have led to a better understanding plume behavior at a number of sites where lateral spreading may have dominated waste migration (e.g. BC Cribs and Trenches). The improved models have been also coupled with inverse models and newly-developed parameter scaling techniques to allow estimation of field-scale and effective transport parameters for the vadose zone. The development and utility of pedotransfer functions for describing fine-scale hydrogeochemical heterogeneity and for incorporating this heterogeneity into reactive transport models was explored. An approach based on grain-size statistics appears feasible and has been used to describe heterogeneity in hydraulic properties and sorption properties, such as the cation exchange capacity and the specific surface area of Hanford sediments. This work has also led to the development of inverse modeling capabilities for time-dependent, subsurface, reactive transport with transient flow fields using an automated optimization algorithm. In addition, a number of geophysical techniques investigated for their potential to provide detailed information on the subtle changes in lithology and bedding surfaces; plume delineation, leak detection. High-resolution resistivity is now being used for detecting saline plumes at several waste sites at Hanford, including tank farms. Results from the field studies and associated analysis have appeared in more than 46 publications generated over the past 4 years. These publications include test plans and status reports, in addition to numerous technical notes and peer reviewed papers.

Ward, Andy L.; Conrad, Mark E.; Daily, William D.; Fink, James B.; Freedman, Vicky L.; Gee, Glendon W.; Hoversten, Gary M.; Keller, Jason M.; Majer, Ernest L.; Murray, Christopher J.; White, Mark D.; Yabusaki, Steven B.; Zhang, Z. F.

2006-07-31T23:59:59.000Z

28

Kinetic studies of anomalous transport  

SciTech Connect

Progress in achieving a physics-based understanding of anomalous transport in toroidal systems has come in large part from investigations based on the proposition that low frequency electrostatic microinstabilities are dominant in the bulk ( confinement'') region of these plasmas. Although the presence here of drift-type modes dependent on trapped particle and ion temperature gradient driven effects appears to be consistent with a number of important observed confinement trends, conventional estimates for these instabilities cannot account for the strong current (I{sub p}) and /or q-scaling frequently found in empirically deduced global energy confinement times for auxiliary-heated discharges. The present paper deals with both linear and nonlinear physics features, ignored in simpler estimates, which could introduce an appreciable local dependence on current. It is also pointed out that while the thermal flux characteristics of drift modes have justifiably been the focus of experimental studies assessing their relevance, other transport properties associated with these microinstabilities should additionally be examined. Accordingly, the present paper provides estimates and discusses the significance of anomalous energy exchange between ions and electrons when fluctuations are present. 19 refs., 3 figs.

Tang, W.M.

1990-11-01T23:59:59.000Z

29

Panhandle Region Transportation Coordination Study  

E-Print Network (OSTI)

....................................................................................Panhandle Transit Needs Index Appendix B .............................................................................................................County Profiles Appendix C ......................................................Panhandle Transit: Operating... Statistics by County Appendix D................................................................................... Panhandle Agency Contact List Appendix E .......................................................... Panhandle Transportation Coordination...

Panhandle Regional Transportation Advisory Group

30

General formula for the thermoelectric transport phenomena based on Fermi liquid theory: Thermoelectric power, Nernst coefficient, and thermal conductivity  

Science Journals Connector (OSTI)

On the basis of linear response transport theory, the general expressions for the thermoelectric transport coefficients, such as thermoelectric power (S), Nernst coefficient (?), and thermal conductivity (?), are derived by using Fermi liquid theory. The obtained expression is exact for the most singular term in terms of 1/?k* (?k* being the quasiparticle damping rate). We utilize Ward identities for the heat velocity which is derived by the local energy conservation law. The derived expressions enable us to calculate various thermoelectric transport coefficients in a systematic way, within the framework of the conserving approximation of Baym and Kadanoff. Thus the present expressions are very useful for studying strongly correlated electrons such as high-Tc superconductors, organic metals, and heavy fermion systems, where the current vertex correction (VC) is expected to play important roles. By using the derived expression, we calculate the thermal conductivity ? in a free-dispersion model up to second order with respect to the on-site Coulomb potential U. We find that it is slightly enhanced due to the VC for the heat current, although the VC for electron current makes the conductivity (?) of this system diverge, reflecting the absence of the umklapp process.

Hiroshi Kontani

2003-01-16T23:59:59.000Z

31

Contribution of calcium-conducting channels to the transport of zinc ions Alexandre Bouron 1,2,3  

E-Print Network (OSTI)

1 Contribution of calcium-conducting channels to the transport of zinc ions Alexandre Bouron 1. The mechanisms controlling its transport through the plasma membrane are far from being completely understood in the cellular uptake of zinc. These ion channels are currently described as systems dedicated to the transport

32

Modeling heat conduction and radiation transport with the diffusion equation in  

NLE Websites -- All DOE Office Websites (Extended Search)

heat conduction and radiation transport with the diffusion equation in NIF ALE-AMR heat conduction and radiation transport with the diffusion equation in NIF ALE-AMR This article has been downloaded from IOPscience. Please scroll down to see the full text article. 2010 J. Phys.: Conf. Ser. 244 022075 (http://iopscience.iop.org/1742-6596/244/2/022075) Download details: IP Address: 50.136.219.251 The article was downloaded on 18/04/2013 at 01:36 Please note that terms and conditions apply. View the table of contents for this issue, or go to the journal homepage for more Home Search Collections Journals About Contact us My IOPscience Modeling Heat Conduction and Radiation Transport with the Diffusion Equation in NIF ALE-AMR A.C. Fisher 1 , D.S. Bailey 1 , T.B. Kaiser 1 , B.T.N. Gunney 1 , N.D. Masters 1 , A.E. Koniges 2 , D.C. Eder 1 , R.W. Anderson 1 1: Lawrence Livermore National Laboratory,

33

Conducting and Using Energy Efficiency Studies for States Presentation  

Energy.gov (U.S. Department of Energy (DOE))

This presentation, given through the DOE's Technical Assitance Program (TAP), provides information on how to effectively conduct and use Energy Efficiency Studies for States.

34

Sampling of Borehole WL-3A through -12 in Support of the Vadose Zone Transport Field Study  

SciTech Connect

This report presents the results of the fiscal year 2001 core sampling effort conducted to support the Vadose Zone Transport Field Study.

Last, George V.; Caldwell, Todd G.; Owen, Antionette T.

2001-09-20T23:59:59.000Z

35

Determination of the transport mechanisms in mixed conduction of reactively sputtered ZnO thin films  

Science Journals Connector (OSTI)

Material grown at highly Zn-rich conditions in reactive sputtering of ZnO thin films resulted in mixed conduction, indicating that stable p-type ZnO can be produced. In n-type conductivity, neutral flaw scattering transport mechanism via centres seems to be dominant due to the existence of oxygen vacancies in high concentrations. An exponential decrease in electron mobility is observed upon cooling from room temperature to 210?K while the concentration of the inactive state increases. This is also a cause of p-type conduction in the low temperature range ( scattering. Quantitative evaluations of VO centres show that fractional distribution of , and charge states are, respectively, around 4%, 95% and 1% of the total [VO] at the room temperature conditions. The energy of phonons interacting with the centre is estimated to be 38.5?meV which is a local phonon mode relaxation, most probably resulting in negative-U behaviour of VO centres.

S Tzemen; Emre Gr; S Do?an

2008-01-01T23:59:59.000Z

36

Seven Universities Selected To Conduct Advanced Turbine Technology Studies  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Seven Universities Selected To Conduct Advanced Turbine Technology Seven Universities Selected To Conduct Advanced Turbine Technology Studies Seven Universities Selected To Conduct Advanced Turbine Technology Studies August 4, 2010 - 1:00pm Addthis Washington, DC - Seven universities have been selected by the U.S. Department of Energy (DOE) to conduct advanced turbine technology studies under the Office of Fossil Energy's (FE) University Turbine Systems Research (UTSR) Program. The universities - located in Georgia, Texas, North Dakota, Louisiana, California, and New York - will investigate the technology needed for the clean and efficient operation of turbines using coal-derived systhesis gas (syngas) and high hydrogen content (HHC) fuels. This technology is crucial to developing advanced coal-based power generation processes, such as

37

Seven Universities Selected To Conduct Advanced Turbine Technology Studies  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Seven Universities Selected To Conduct Advanced Turbine Technology Seven Universities Selected To Conduct Advanced Turbine Technology Studies Seven Universities Selected To Conduct Advanced Turbine Technology Studies August 4, 2010 - 1:00pm Addthis Washington, DC - Seven universities have been selected by the U.S. Department of Energy (DOE) to conduct advanced turbine technology studies under the Office of Fossil Energy's (FE) University Turbine Systems Research (UTSR) Program. The universities - located in Georgia, Texas, North Dakota, Louisiana, California, and New York - will investigate the technology needed for the clean and efficient operation of turbines using coal-derived systhesis gas (syngas) and high hydrogen content (HHC) fuels. This technology is crucial to developing advanced coal-based power generation processes, such as

38

Relationship between transport properties and phase transformations in mixed-conducting oxides  

SciTech Connect

To elucidate the relationship between transport properties and phase transformations in mixed-conducting oxides, Sr{sub 0.9}Ca{sub 0.1}Co{sub 0.89}Fe{sub 0.11}O{sub 3-} {sub {delta}} (SCCFO) and SrCoO{sub 3-} {sub {delta}} (SCO) were chosen as the model materials and have been investigated in detail. Oxygen permeation measurements verified that both oxides are well permeable to oxygen at elevated temperatures, e.g., at 900 deg. C during a cooling procedure, oxygen permeation rates as large as 1.5 and 2.0 mL/min/cm{sup 2} could be obtained with disk-shaped SCCFO and SCO membranes of thickness 1.5 mm, respectively. But when cooled to critical temperatures, the oxygen permeability of these kinds of oxides diminished sharply, which could be recovered by increasing the temperature again to certain values. Abrupt changes on electrical conductivity were also observed for both oxides around the same region of temperature as that of oxygen permeability. As indicated by high-temperature X-ray diffraction and thermal analysis, the SCCFO and SCO systems undergo phase transformation between a low-temperature orthorhombic brownmillerite structure (B) or a hexagonal 2H-type structure (H) and a high-temperature cubic perovskite structure (C), respectively. The present results suggest the observed abrupt changes in transport properties versus temperature are attributed to such phase transformation, which may be directly associated with the order-disorder transition of oxygen vacancies. Moreover, compared to the B/C transformation that mainly involves an order-disorder transition on the oxygen sublattice, the H/C one necessarily also involves the cooperative long-range reorganization on the cation sublattice. Therefore it occurs at a higher temperature and absorbs more heat quantity than those of B/C transformation.

Deng, Z.Q. [State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China)]. E-mail: dzqm@dicp.ac.cn; Yang, W.S. [State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023 (China); Liu, W. [Laboratory of Advanced Functional Materials and Devices, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China); Chen, C.S. [Laboratory of Advanced Functional Materials and Devices, Department of Materials Science and Engineering, University of Science and Technology of China, Hefei, Anhui 230026 (China)

2006-02-15T23:59:59.000Z

39

Biofueled Public Transport for sustainable transportation: A case study of Stockholm and possibility in Kathmandu.  

E-Print Network (OSTI)

?? Uttam Moktan, Biofueled Public Transport for sustainable transportation: Case Study of Stockholm and possibility in KathmanduHuman Geography, advanced level, master thesis for master exam (more)

Moktan, Uttam

2013-01-01T23:59:59.000Z

40

Transport properties, specific heat and thermal conductivity of GaN nanocrystalline ceramic  

SciTech Connect

The structural and transport properties (resistivity, thermopower and Hall effect), specific heat and thermal conductivity have been measured for GaN nanocrystalline ceramic prepared by hot pressing. It was found that the temperature dependence of resistivity in temperature range 10-300 K shows the very low activation energy, which is ascribed to the shallow donor doping originating in amorphous phase of sample. The major charge carriers are electrons, what is indicated by negative sign of Hall constant and Seebeck coefficient. The thermopower attains large values (-58 {mu}V/K at 300 K) and was characterized by linear temperature dependence which suggests the diffusion as a major contribution to Seebeck effect. The high electron concentration of 1.3x10{sup 19} cm{sup -3} and high electronic specific heat coefficient determined to be 2.4 mJ/molK{sup 2} allow to conclude that GaN ceramic demonstrates the semimetallic-like behavior accompanied by very small mobility of electrons ({approx}0.1 cm{sup 2}/V s) which is responsible for its high resistivity. A low heat conductivity of GaN ceramics is associated with partial amorphous phase of GaN grains due to high pressure sintering. - Graphical Abstract: Thermal resistivity and thermopower measurements indicates the high phonon scattering and lack of phonon-drag contribution to thermopower in GaN nanoceramics pressed under 4 GPa at 800 {sup o}C.

Sulkowski, Czeslaw [Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroclaw (Poland); ChuchmaLa, Andrzej, E-mail: andrzej.chuchmala@pwr.wroc.p [Wroclaw University of Technology, Institute of Electrical Engineering Fundamentals (I7), Wybrzeze Wyspianskiego 27, 50-370 Wroclaw (Poland); Zaleski, Andrzej J.; Matusiak, Marcin; Mucha, Jan; GLuchowski, PaweL; Strek, WiesLaw [Institute of Low Temperature and Structure Research, Polish Academy of Sciences, P.O. Box 1410, 50-950 Wroclaw (Poland)

2010-10-15T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Parametric study on maximum transportable distance and cost for thermal energy transportation using various coolants  

SciTech Connect

The operation temperature of advanced nuclear reactors is generally higher than commercial light water reactors and thermal energy from advanced nuclear reactor can be used for various purposes such as district heating, desalination, hydrogen production and other process heat applications, etc. The process heat industry/facilities will be located outside the nuclear island due to safety measures. This thermal energy from the reactor has to be transported a fair distance. In this study, analytical analysis was conducted to identify the maximum distance that thermal energy could be transported using various coolants such as molten-salts, helium and water by varying the pipe diameter and mass flow rate. The cost required to transport each coolant was also analyzed. The coolants analyzed are molten salts (such as: KClMgCl2, LiF-NaF-KF (FLiNaK) and KF-ZrF4), helium and water. Fluoride salts are superior because of better heat transport characteristics but chloride salts are most economical for higher temperature transportation purposes. For lower temperature water is a possible alternative when compared with He, because low pressure He requires higher pumping power which makes the process very inefficient and economically not viable for both low and high temperature application.

Su-Jong Yoon; Piyush Sabharwall

2014-07-01T23:59:59.000Z

42

Transport studies on CVD-grown graphene  

E-Print Network (OSTI)

In this thesis, we report transport studies performed on CVD-grown graphene. We perform resistivity and hall measurements on a large-area sample at 4' K. We measure the carrier mobility of the sample and find it to be on ...

Huntley, Miriam Hanna

2009-01-01T23:59:59.000Z

43

Institute of Transport Studies PSU Transportation Seminar, 21 May 2010  

E-Print Network (OSTI)

of Electric Bicycles Assoc. Prof. Geoff Rose Director, ITS (Monash) Transport Theme Leader, Monash expand the role of the bicycle in the context of urban transportation · This seminar examines electric the rider must be pedaling for the motor to provide power ­ Term `hybrid power' being used by some

Bertini, Robert L.

44

Access Handbook - Conducting Health Studies at Department of Energy Sites  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

HDBK-1209-2012 HDBK-1209-2012 DOE HANDBOOK Access Handbook - Conducting Health Studies at Department of Energy Sites U.S. Department of Energy AREA OCHS Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. NOT MEASUREMENT SENSITIVE DOE-HDBK-1209-2012 i This Department of Energy (DOE) Handbook provides guidelines for the successful conduct of health studies at DOE sites. The Handbook does not establish requirements and any requirements that must be met are explicitly stated to be requirements in a DOE requirements document. This document is available on the Department of Energy Technical Standards Program Web Page at http://www.hss.energy.gov/nuclearsafety/techstds/ DOE-HDBK-1209-2012

45

When it comes to transporting energy, nature has two vital tools at its disposal: conduction by heat and by  

E-Print Network (OSTI)

When it comes to transporting energy, nature has two vital tools at its disposal: conduction by heat and by electricity. But these two phenomena have never been treated equally by scientists that have transformed many aspects of our lives. But similar devices that allow the flow of heat

Li, Baowen

46

Summer Bicycle Round Up Begins Monday, April 28 Clemson University Parking and Transportation Services is conducting a  

E-Print Network (OSTI)

Summer Bicycle Round Up Begins Monday, April 28 Clemson University Parking and Transportation Services is conducting a Summer Bicycle Round-Up prior to the Fall 2014 semester in an effort to clear campus bike racks of abandoned bicycles and ensure that no bicycles have been left in illegal areas. All

Duchowski, Andrew T.

47

Vadose Zone Transport Field Study: Status Report  

SciTech Connect

Studies were initiated at the Hanford Site to evaluate the process controlling the transport of fluids in the vadose zone and to develop a reliable database upon which vadose-zone transport models can be calibrated. These models are needed to evaluate contaminant migration through the vadose zone to underlying groundwaters at Hanford. A study site that had previously been extensively characterized using geophysical monitoring techniques was selected in the 200 E Area. Techniques used previously included neutron probe for water content, spectral gamma logging for radionuclide tracers, and gamma scattering for wet bulk density. Building on the characterization efforts of the past 20 years, the site was instrumented to facilitate the comparison of nine vadose-zone characterization methods: advanced tensiometers, neutron probe, electrical resistance tomography (ERT), high-resolution resistivity (HRR), electromagnetic induction imaging (EMI), cross-borehole radar (XBR), and cross-borehole seismic (XBS). Soil coring was used to obtain soil samples for analyzing ionic and isotopic tracers.

Gee, Glendon W.; Ward, Anderson L.

2001-11-30T23:59:59.000Z

48

Texarkana Urban Transportation Study 2035 Metropolitan Transportation Plan  

E-Print Network (OSTI)

-Line Transit Routes 7-6 Map 7.2: Vision for High Speed Rail in America 7-10 Map 7.3: Texas T-Bone High-Speed Rail Corridor 7-11 Map 10.1: MTP Proposed Projects 2010 ? 2013 10-19 Map 10.2: MTP Proposed Projects 2014 ? 2019 10-21 Map 10.3: MTP...-7 TUTS 2035 PLAN ii October 1, 2009 7 PUBLIC TRANSPORTATION Amtrak-Passenger Rail Service 7-1 Texarkana Regional Airport 7-2 Greyhound Intercity Bus Service 7-4 Texarkana Urban Transit District Public Transportation 7-4 TRAX ? Rural Public...

Texarkana Metropolitan Planning Organization

2009-10-01T23:59:59.000Z

49

Site study plan for Transportation, Deaf Smith County Site, Texas: Preliminary draft  

SciTech Connect

This site study plan describes transportation field studies to be conducted during the characterization of the Deaf Smith County, Texas, site for the US Department of Energy's Salt Repository Project. The studies are needed to identify and assess potential project impacts to transportation infrastructure and systems in the project vicinity and along potential transportation routes to the site across the State of Texas. The studies are also needed to locate and design project transportation facilities, and to evaluate and design impact mitigation. After identifying the transportation information requirements needed to comply with Federal, State, and local regulations and repository program requirements, the site study plan describes the study design and rationale, the field data collection procedures and equipment, the data analysis methods and application of results, the data management strategy, the schedule of field activities, the management of the study, and the study's quality assurance program. The field data collection activities are organized into programs for the characterization of site vicinity rail corridors and highway corridors, characterization of alternative statewide transportation routes, monitoring of site characterization effects on transportation, characterization of aircraft overflight patterns and hazardous material transportation patterns, and assessment of emergency response preparedness along alternative statewide transportation routes. 34 refs., 10 figs., 2 tabs.

Not Available

1987-06-01T23:59:59.000Z

50

A Discussion of Conductivity Testing in High Temperature Membranes (lessons learned in assessing transport)  

Energy.gov (U.S. Department of Energy (DOE))

Presentation on conductivity testing in high temperature membranes given by Jim Boncella of Los Alamos National Laboratory at the High Temperature Membrane Working Group meeting in October 2005.

51

Multi-Path Transportation Futures Study - Lessons for the Transportation Energy Futures Study  

NLE Websites -- All DOE Office Websites (Extended Search)

Path Transportation Path Transportation Futures Study -- Lessons for the Transportation Energy Futures Study Steven Plotkin, Argonne National Laboratory LDV Workshop, July 26, 2010 What have we learned that might be useful to TEF?  Do LOTS of sensitivity analysis - in this time frame, uncertainties about fuel price, technology costs, consumer behavior are very large, and effect of changed assumptions on outcomes can be huge  Focus on marginal costs and performance -- Advanced technologies may look good against today's technologies, but that's really not what people will be judging them against.....the best "reference vehicle" is one customers will be seeing on showroom floors, in that year.  Understand your model! -- Some of your "key results" may be coming

52

Molecular Dynamic Study of Thermal Conductivity of Amorphous Nanoporous Silica  

E-Print Network (OSTI)

as a thermal isolation layer. Ceramics International, 34(Thermal conductivity of highly porous zirconia. Journal of the European Ceramic

Coquil, Thomas; Fang, Jin; Pilon, Laurent

2011-01-01T23:59:59.000Z

53

Studies on lithium acetate doped chitosan conducting polymer system  

Science Journals Connector (OSTI)

The structure of chitosan contains the amine group that can act as electron donors. Complexation between chitosan and the salt can be proven by infrared and X-ray photoelectron spectroscopy methods. The NH2, NH3+ and O?C-NHR vibrations which can be observed at 1590, 1560 and 1650 cm?1 shift to lower wave numbers when the complexes are formed. The after deconvolution Li1s core level spectrum of the chitosansalt complexes can contain several gaussian components one of which has a binding energy peak at 55.2 eV which signifies LiN interaction. The component that peaks at ?403 eV in the N1s core level spectrum complements the proof of NLi interaction. The highest conductivity achieved for a plasticized chitosansalt complex is of the order 10?6 S/cm using lithium acetate as the doping salt. Transference number studies prove that this material is ionic conductor and from transient ionic current studies that mobility of the ions is of the order of 10?4 cm2/Vs.

M.Z.A. Yahya; A.K. Arof

2002-01-01T23:59:59.000Z

54

Dept: INST OF TRANSPORTATION STUDIES -061822 Position: Program Manager  

E-Print Network (OSTI)

Studies, and by extension, the UC Davis Transportation & Energy Programs. The National Center is a part Transportation is one of many Centers and programs administered through the UC Davis Institute of Transportation is led by UC Davis in a consortium made up of University of Southern California, Georgia Tech, University

California at Davis, University of

55

Transport and recombination channels in undoped microcrystalline silicon studied by ESR and EDMR  

SciTech Connect

The authors present a detailed study of ESR and spin-dependent transport (EDMR) on {micro}c-Si. They identify to different types of defects at g = 2.0055({+-}3) and g = 2.0044({+-}5) and study their influence on transport and recombination by stepwise annealing the samples. They find that transport is not controlled by defects if N{sub D} < 10{sup 18} cm{sup {minus}3}. For N{sub D} > 10{sup 18} cm{sup {minus}3} a dramatic decrease of the conductivity is found and they identify a hopping contribution in transport. To explain their ESR and EDMR results they propose a simple model where most defects are distributed at the surface of the columns and transport is along percolation paths. They also observe minor metastable changes of the defect density which are assigned to adsorption of atmospheric oxygen.

Will, D.; Lerner, C.; Fuhs, W.; Lips, K.

1997-07-01T23:59:59.000Z

56

Nevada potential repository preliminary transportation strategy Study 2. Volume 1  

SciTech Connect

The objectives of this study were to build on the findings of the Nevada Potential Repository Preliminary Transportation Strategy Study 1 (CRWMS M&O 1995b), and to provide additional information for input to the repository environmental impact statement (EIS) process. In addition, this study supported the future selection of a preferred rail corridor and/or heavy haul route based on defensible data, methods, and analyses. Study research did not consider proposed legislation. Planning was conducted according to the Civilian Radioactive Waste Management Program Plan (DOE 1994a). The specific objectives of Study 2 were to: eliminate or reduce data gaps, inconsistencies, and uncertainties, and strengthen the analysis performed in Study 1; develop a preliminary list of rail route evaluation criteria that could be used to solicit input from stakeholders during scoping meetings. The evaluation criteria will be revised based on comments received during scoping; restrict and refine the width of the four rail corridors identified in Study 1 to five miles or less, based on land use constraints and engineering criteria identified and established in Study 2; evaluate national-level effects of routing spent nuclear fuel and high-level waste to the four identified branch lines, including the effects of routing through or avoiding Las Vegas; continue to gather published land use information and environmental data to support the repository EIS; continue to evaluate heavy haul truck transport over three existing routes as an alternative to rail and provide sufficient information to support the repository EIS process; and evaluate secondary uses for rail (passenger use, repository construction, shared use).

NONE

1996-02-01T23:59:59.000Z

57

A study of temperature distributions due to conduction reservoir heating  

E-Print Network (OSTI)

of thermal conductivity with temperature. He showed this effect could be very important in considering a material such as oil shale, where the conductivity of the raw shale may be five times as great as that of the spent shale. Neglecting this variation... conduction model to investigate the in place heating of oil shale by hot gases forced through a fracture. The heat injection rate he considered is much less than would normally be employed for steam injection into permeable reservoirs and is only about...

Connaughton, Charles Richard

2012-06-07T23:59:59.000Z

58

Experimental Study of Acid Fracture Conductivity of Austin Chalk Formation  

E-Print Network (OSTI)

Acid fracture conductivity and the effect of key variables in the etching process during acid fracturing can be assessed at the laboratory scale. This is accomplished by using an experimental apparatus that simulates acid injection fluxes comparable...

Nino Penaloza, Andrea

2013-05-01T23:59:59.000Z

59

Nanoclay Gelation Approach toward Improved Dye-Sensitized Solar Cell Efficiencies: An Investigation of Charge Transport and Shift in the TiO2 Conduction Band  

Science Journals Connector (OSTI)

Nanoclay Gelation Approach toward Improved Dye-Sensitized Solar Cell Efficiencies: An Investigation of Charge Transport and Shift in the TiO2 Conduction Band ... Nanoclay minerals play a promising role as additives in the liquid electrolyte to form a gel electrolyte for quasi-solid-state dye-sensitized solar cells, because of the high chemical stability, unique swelling capability, ion exchange capacity, and rheological properties of nanoclays. ... The nanoclays used in previous studies were mainly of smectite/montmorillonite type, which belong to the family of cationic clays (hydroxides layers with negative charge). ...

Xiu Wang; Sneha A. Kulkarni; Bruno Ieiri Ito; Sudip K. Batabyal; Kazuteru Nonomura; Chee Cheong Wong; Michael Grtzel; Subodh G. Mhaisalkar; Satoshi Uchida

2012-12-19T23:59:59.000Z

60

Nuclear Spin Lattice Relaxation and Conductivity Studies of the Non-Arrhenius Conductivity Behavior in Lithium Fast Ion Conducting Sulfide Glasses  

SciTech Connect

As time progresses, the world is using up more of the planet's natural resources. Without technological advances, the day will eventually arrive when these natural resources will no longer be sufficient to supply all of the energy needs. As a result, society is seeing a push for the development of alternative fuel sources such as wind power, solar power, fuel cells, and etc. These pursuits are even occurring in the state of Iowa with increasing social pressure to incorporate larger percentages of ethanol in gasoline. Consumers are increasingly demanding that energy sources be more powerful, more durable, and, ultimately, more cost efficient. Fast Ionic Conducting (FIC) glasses are a material that offers great potential for the development of new batteries and/or fuel cells to help inspire the energy density of battery power supplies. This dissertation probes the mechanisms by which ions conduct in these glasses. A variety of different experimental techniques give a better understanding of the interesting materials science taking place within these systems. This dissertation discusses Nuclear Magnetic Resonance (NMR) techniques performed on FIC glasses over the past few years. These NMR results have been complimented with other measurement techniques, primarily impedance spectroscopy, to develop models that describe the mechanisms by which ionic conduction takes place and the dependence of the ion dynamics on the local structure of the glass. The aim of these measurements was to probe the cause of a non-Arrhenius behavior of the conductivity which has been seen at high temperatures in the silver thio-borosilicate glasses. One aspect that will be addressed is if this behavior is unique to silver containing fast ion conducting glasses. more specifically, this study will determine if a non-Arrhenius correlation time, {tau}, can be observed in the Nuclear Spin Lattice Relaxation (NSLR) measurements. If so, then can this behavior be modeled with a new single distribution of activation energies (DAE) to calculate the corresponding conductivity and relaxation rates as a function of temperature and frequency?

Benjamin Michael Meyer

2003-05-31T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


61

Core transport studies in fusion devices  

E-Print Network (OSTI)

The turbulence in magnetically confined fusion plasmas has important and non-trivial effects on the quality of the energy confinement. These effects are hard to make a quantitative assessment of analytically. The problem investigated in this article is the transport of energy and particles, in particular impurities, in a Tokamak plasma. Impurities from the walls of the plasma vessel cause energy losses if they reach the plasma core. It is therefore important to understand the transport mechanisms to prevent impurity accumulation and minimize losses. This is an area of research where turbulence plays a major role and is intimately associated with the performance of future fusion reactors, such as ITER.

Strand, Pr; Nordman, Hans

2010-01-01T23:59:59.000Z

62

Transportation Energy Futures Study: The Key Results and Conclusions  

Open Energy Info (EERE)

Transportation Energy Futures Study: The Key Results and Conclusions Transportation Energy Futures Study: The Key Results and Conclusions Webinar Home > Groups > OpenEI Community Central Graham7781's picture Submitted by Graham7781(1992) Super contributor 1 May, 2013 - 11:38 This webinar will outline the key results and conclusions from EERE's Transportation Energy Futures study, which highlights underexplored opportunities to reduce petroleum use and greenhouse gas emissions from the U.S. transportation sector. There will be time for questions from attendees at the end of the webinar. Principal Deputy Assistant Secretary Mike Carr will introduce the study and provide context on EERE's transportation energy strategy. In his role with EERE, Mike provides leadership direction on cross-cutting activities in EERE's portfolio. In particular, he is using his experience in policy

63

Conductivity tracer studies for a fluidized-bed bioreactor  

SciTech Connect

An automated conductivity tracer test was developed to measure the residence time distribution (RTD) of a cometabolic fluidized-bed bioreactor (FBBR). The FBBR contained sand-core bioparticles grown with phenol and it provided high (70% to 80%) removal of trichloroethene (TCE) at short (3 minute) detention times. The tracer test apparatus was constructed with off-the-shelf components controlled with a PC-based data acquisition system. Non-disruptive hydrodynamic testing was obtained during normal operation of the FBBR. The conductivity of injected brine pulses was monitored at the reactor inlet and outlet. Dispersion numbers and detention times were computed by fitting the advection-dispersion model to the tracer curves. Typical dispersion numbers attributed to the fluidized-bed of bioparticles ranged from 0.07 to 0.11. In simplified modeling of the FBBR, dispersion was found to have little effect on TCE removal. Based on the dispersion of brine pulses, it was determined that phenol feed pulses injected at inhibitory concentrations over 2 g/L would be rapidly dispersed in the biological bed to non-inhibitory concentrations.

Leung, S.Y.; Segar, R.L. Jr. [Univ. of Missouri, Columbia, MO (United States). Dept. of Civil Engineering

1997-12-31T23:59:59.000Z

64

NEMS Freight Transportation Module Improvement Study  

Reports and Publications (EIA)

The U.S. Energy Information Administration (EIA) contracted with IHS Global, Inc. (IHS) to analyze the relationship between the value of industrial output, physical output, and freight movement in the United States for use in updating analytic assumptions and modeling structure within the National Energy Modeling System (NEMS) freight transportation module, including forecasting methodologies and processes to identify possible alternative approaches that would improve multi-modal freight flow and fuel consumption estimation.

2015-01-01T23:59:59.000Z

65

Study of cyclotron-resonance-induced conductivity in n-GaAs  

Science Journals Connector (OSTI)

A study has been made of the change in the conductivity of n-GaAs under cyclotron-resonance (CR) conditions (cross modulation) at high magnetic fields. Measurements are presented of CR-induced Hall effect, CR-induced conductivity, and the CR absorption coefficient in n-GaAs, as a function of temperature (8-40 K) at three magnetic field values (B=6.3,10.5,and13.0 T). The CR-induced Hall-effect measurements show that the change in the conductivity under CR conditions is due to a change in the free-carrier density for B=10.5and13.0 T over the entire temperature range and for B=6.3 T below 15 K. For B=6.3 T above 15 K a decrease in the mobility is observed. The change in the free-carrier density is calculated with a three-level rate equation model. With this model the energy relaxation time of the photoexcited carrier can be calculated from the measured change in the conductivity and the absorption coefficient. This results in an energy relaxation time with a T-3 temperature dependence and times of the order of 10-8 s. Using this temperature dependence of energy relaxation time, the CR-induced conductivity change is quantitatively explained. The energy relaxation of the photoexcited carriers is discussed. It is believed to be a two-step process involving a quasielastic transition from the first to the zeroth Landau level followed by a subsequent relaxation to the bottom of the band by the emission of acoustical phonons. The measured energy relaxation time combined with the measured momentum relaxation time derived from the CR linewidth and from dc transport measurement shows that electron scattering in high magnetic fields is a highly elastic process. The number of interactions per unit time in which energy is transferred to the number of interactions in which only momentum is transferred varies from 10-3 at 40 K to 10-5 at 10 K.

H. J. A. Bluyssen; J. C. Maan; T. B. Tan; P. Wyder

1980-07-15T23:59:59.000Z

66

Acid Fracture and Fracture Conductivity Study of Field Rock Samples  

E-Print Network (OSTI)

Acid fracturing is a well stimulation strategy designed to increase the productivity of a producing well. The parameters of acid fracturing and the effects of acid interaction on specific rock samples can be studied experimentally. Acid injection...

Underwood, Jarrod

2013-11-15T23:59:59.000Z

67

THE INSTITUTE OF TRANSPORT AND LOGISTICS STUDIES (ITLS)  

E-Print Network (OSTI)

THE INSTITUTE OF TRANSPORT AND LOGISTICS STUDIES (ITLS) Aviation Management THE UNIVERSITY, terminal management and cargo logistics, supply chain management, distribution, international freight. 2002 Graduate Frederic Horst has worked as National Project Officer­ Logistics and Synergies at Veolia

Viglas, Anastasios

68

Computational Fluid Dynamics Study of Aerosol Transport and Deposition Mechanisms  

E-Print Network (OSTI)

In this work, various aerosol particle transport and deposition mechanisms were studied through the computational fluid dynamics (CFD) modeling, including inertial impaction, gravitational effect, lift force, interception, and turbophoresis, within...

Tang, Yingjie

2012-07-16T23:59:59.000Z

69

Center for Transportation Studies Nohad A. Toulan School of Urban Studies and Planning  

E-Print Network (OSTI)

Center for Transportation Studies Nohad A. Toulan School of Urban Studies and Planning College-disciplinary research on multi-modal surface transportation issues; educating a diverse array of current practitioners and future leaders in the transportation field; and encouraging implementation of relevant research results

Bertini, Robert L.

70

Theoretical and experimental analysis of conductivity, ion diffusion and molecular transport during cell electroporation --Relation between short-lived and  

E-Print Network (OSTI)

electric field, which enables transport of molecules and ions across the cell membrane. Several and ions due to the hydrophobic nature of the lipid bilayer. Transport through the membrane occurs only for certain molecules and ions through membrane channels by means of diffusion or by active transport. However

Ljubljana, University of

71

A comprehensive study of thermoelectric and transport properties of ?-silicon carbide nanowires  

SciTech Connect

The temperature dependence of the Seebeck coefficient, the electrical and thermal conductivities of individual ?-silicon carbide nanowires produced by combustion in a calorimetric bomb were studied using a suspended micro-resistance thermometry device that allows four-point probe measurements to be conducted on each nanowire. Additionally, crystal structure and growth direction for each measured nanowire was directly obtained by transmission electron microscopy analysis. The Fermi level, the carrier concentration, and mobility of each nanostructure were determined using a combination of Seebeck coefficient and electrical conductivity measurements, energy band structure and transport theory calculations. The temperature dependence of the thermal and electrical conductivities of the nanowires was explained in terms of contributions from boundary, impurity, and defect scattering.

Valentn, L. A.; Betancourt, J.; Fonseca, L. F., E-mail: luis.fonseca@upr.edu [Department of Physics University of Puerto Rico, Rio Piedras (Puerto Rico); Pettes, M. T.; Shi, L. [Department of Mechanical Engineering, The University of Texas at Austin, Texas 78712 (United States); Soszy?ski, M.; Huczko, A. [Department of Chemistry, Warsaw University, Pasteur 1 Str., 02-093 Warsaw (Poland)

2013-11-14T23:59:59.000Z

72

Glass bead micromodel study of solute transport  

E-Print Network (OSTI)

This study presents the quantification of glass bead micromodel experiments through a combination of computational modeling and experimental analysis. The computational model simulates two-dimensional solute flow through porous media using a finite...

Fedirchuk, Paula Diane

1995-01-01T23:59:59.000Z

73

Electrical Conductivity, Near-Infrared Absorption, and Thermal Lens Spectroscopic Studies of Percolation of Microemulsions  

E-Print Network (OSTI)

Electrical Conductivity, Near-Infrared Absorption, and Thermal Lens Spectroscopic Studies studied below and above the percolation thresholds by electrical conductivity, near-infrared absorption. In this work the structure of microemulsions was investigated by using the near-IR absorption and thermal lens

Reid, Scott A.

74

Transportation  

NLE Websites -- All DOE Office Websites (Extended Search)

Transportation Transportation Transportation of Depleted Uranium Materials in Support of the Depleted Uranium Hexafluoride Conversion Program Issues associated with transport of depleted UF6 cylinders and conversion products. Conversion Plan Transportation Requirements The DOE has prepared two Environmental Impact Statements (EISs) for the proposal to build and operate depleted uranium hexafluoride (UF6) conversion facilities at its Portsmouth and Paducah gaseous diffusion plant sites, pursuant to the National Environmental Policy Act (NEPA). The proposed action calls for transporting the cylinder at ETTP to Portsmouth for conversion. The transportation of depleted UF6 cylinders and of the depleted uranium conversion products following conversion was addressed in the EISs.

75

Rio Grande sediment study -- Supply and transport  

SciTech Connect

The 1992 New Mexico State Legislature directed the Interstate Stream Commission (ISC) to study the feasibility of clearing and deepening the channel of the Rio Grande between Albuquerque and Elephant Butte to improve water conveyance and water conservation. The ISC requested the US Army Corps of Engineers-Albuquerque District (COE) to undertake this study under the Planning Assistance to States Program. The study was divided into two phases. Phase 1 consisted of an analysis of the sediment contribution to the Rio grande from the tributaries and an evaluation of the existing US Geological Survey (USGS) sediment gage data. Phase 2 will be an analysis, through the use of an HEC-6, Scour and Deposition in Rivers and Reservoirs, computer model, to determine the long-term performance of any Rio Grande channel improvements. This narrative presents the Phase 1 methods and results.

Diniz, E. [Resource Technology, Inc., Albuquerque, NM (United States); Eidson, D.; Bourgeois, M. [Army Corps of Engineers, Albuquerque, NM (United States)

1995-12-31T23:59:59.000Z

76

Helium, Iron and Electron Particle Transport and Energy Transport Studies on the TFTR Tokamak  

DOE R&D Accomplishments (OSTI)

Results from helium, iron, and electron transport on TFTR in L-mode and Supershot deuterium plasmas with the same toroidal field, plasma current, and neutral beam heating power are presented. They are compared to results from thermal transport analysis based on power balance. Particle diffusivities and thermal conductivities are radially hollow and larger than neoclassical values, except possibly near the magnetic axis. The ion channel dominates over the electron channel in both particle and thermal diffusion. A peaked helium profile, supported by inward convection that is stronger than predicted by neoclassical theory, is measured in the Supershot The helium profile shape is consistent with predictions from quasilinear electrostatic drift-wave theory. While the perturbative particle diffusion coefficients of all three species are similar in the Supershot, differences are found in the L-Mode. Quasilinear theory calculations of the ratios of impurity diffusivities are in good accord with measurements. Theory estimates indicate that the ion heat flux should be larger than the electron heat flux, consistent with power balance analysis. However, theoretical values of the ratio of the ion to electron heat flux can be more than a factor of three larger than experimental values. A correlation between helium diffusion and ion thermal transport is observed and has favorable implications for sustained ignition of a tokamak fusion reactor.

Synakowski, E. J.; Efthimion, P. C.; Rewoldt, G.; Stratton, B. C.; Tang, W. M.; Grek, B.; Hill, K. W.; Hulse, R. A.; Johnson, D .W.; Mansfield, D. K.; McCune, D.; Mikkelsen, D. R.; Park, H. K.; Ramsey, A. T.; Redi, M. H.; Scott, S. D.; Taylor, G.; Timberlake, J.; Zarnstorff, M. C. (Princeton Univ., NJ (United States). Plasma Physics Lab.); Kissick, M. W. (Wisconsin Univ., Madison, WI (United States))

1993-03-00T23:59:59.000Z

77

Transportation  

NLE Websites -- All DOE Office Websites (Extended Search)

Health Risks » Transportation Health Risks » Transportation DUF6 Health Risks line line Accidents Storage Conversion Manufacturing Disposal Transportation Transportation A discussion of health risks associated with transport of depleted UF6. Transport Regulations and Requirements In the future, it is likely that depleted uranium hexafluoride cylinders will be transported to a conversion facility. For example, it is currently anticipated that the cylinders at the ETTP Site in Oak Ridge, TN, will be transported to the Portsmouth Site, OH, for conversion. Uranium hexafluoride has been shipped safely in the United States for over 40 years by both truck and rail. Shipments of depleted UF6 would be made in accordance with all applicable transportation regulations. Shipment of depleted UF6 is regulated by the

78

Heat conduction of single-walled carbon nanotube isotope-superlattice structures: A molecular dynamics study  

E-Print Network (OSTI)

-folding effect to thermal boundary resistance of lattice interface. The crossover mechanism is explained-dimensional materials. In our previous molecular dynamics study, isotope-effects on the thermal conduction were of heat conduction of SWNTs subjected to nanoscale intrinsic thermal resistances. Here, in order to reduce

Maruyama, Shigeo

79

Study of Ionic Conductivity Profiles of the Air Cathode of a PEMFC by AC Impedance Spectroscopy  

E-Print Network (OSTI)

Study of Ionic Conductivity Profiles of the Air Cathode of a PEMFC by AC Impedance Spectroscopy membrane fuel cell PEMFC cathode by ac impedance measurement at open-circuit potential conditions by impregnating a proton-conducting ionomer in the catalyst active layer of the cathode of a polymer electrolyte

80

Technology Analysis - Multi-Path Transportation Futures Study  

NLE Websites -- All DOE Office Websites (Extended Search)

Multi-Path Transportation Futures Study: Vehicle Characterization and Scenario Analyses Multi-Path Transportation Futures Study: Vehicle Characterization and Scenario Analyses The Multi-Path Study began by defining the basic physical characteristics of future advanced midsize cars and midsize SUVs with drivetrain technologies ranging from advanced SI and CI (diesel) engine-based conventional drivetrains through hybrid drivetrains (including plug-ins), to fuel cell hybrids and plug-in hybrids, through pure-electric drivetrains. The study evaluates these vehicles’ fuel economy using Argonne’s PSAT simulation model, estimates their costs, and does detailed analyses of their cost-effectiveness, balancing first costs against fuel savings. The study uses a version of the National Energy Modeling System (developed by the Energy Information Administration in the U.S. Department of Energy) to evaluate several scenarios assuming different vehicle costs (one set based on a literature review, one based on DOE goals) and availability of purchase subsidies.

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


81

Feasibility study for a transportation operations system cask maintenance facility  

SciTech Connect

The US Department of Energy (DOE), Office of Civilian Radioactive Waste Management (OCRWM) is responsible for the development of a waste management program for the disposition of spent nuclear fuel (SNF) and high-level waste (HLW). The program will include a transportation system for moving the nuclear waste from the sources to a geologic repository for permanent disposal. Specially designed casks will be used to safely transport the waste. The cask systems must be operated within limits imposed by DOE, the Nuclear Regulatory Commission (NRC), and the Department of Transportation (DOT). A dedicated facility for inspecting, testing, and maintaining the cask systems was recommended by the General Accounting Office (in 1979) as the best means of assuring their operational effectiveness and safety, as well as regulatory compliance. In November of 1987, OCRWM requested a feasibility study be made of a Cask Maintenance Facility (CMF) that would perform the required functions. 46 refs., 16 figs., 13 tabs.

Rennich, M.J.; Medley, L.G.; Attaway, C.R.

1991-01-01T23:59:59.000Z

82

IAEA-CN-69/EXP2/12 Highly Radiative Plasmas for Local Transport Studies and Power and Particle  

E-Print Network (OSTI)

for local transport studies, because the distribution of power loss between radiation and conduction plus. The response of the electron and ion temperatures to greatly increased radiative losses from the electrons alpha heating power must be dispersed.?[1] Heat removal by radiation from controlled injection

83

An Analytical Study Of A 2-Layer Transient Thermal Conduction Problem As  

Open Energy Info (EERE)

Analytical Study Of A 2-Layer Transient Thermal Conduction Problem As Analytical Study Of A 2-Layer Transient Thermal Conduction Problem As Applied To Soil-Temperature Surveys Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Journal Article: An Analytical Study Of A 2-Layer Transient Thermal Conduction Problem As Applied To Soil-Temperature Surveys Details Activities (0) Areas (0) Regions (0) Abstract: The soil temperature survey is an inexpensive exploration method in groundwater and geothermal resource investigations. In its simplest form, temperatures measured in shallow holes are analyzed to deduce variations in material properties. Typical interpretation schemes are based on simple, one-layer solutions to the Fourier conduction equation using the annual solar cycle as a surface heat source. We present a solution to the

84

Communication: Minimum in the thermal conductivity of supercooled water: A computer simulation study  

SciTech Connect

We report the results of a computer simulation study of the thermodynamic properties and the thermal conductivity of supercooled water as a function of pressure and temperature using the TIP4P-2005 water model. The thermodynamic properties can be represented by a two-structure equation of state consistent with the presence of a liquid-liquid critical point in the supercooled region. Our simulations confirm the presence of a minimum in the thermal conductivity, not only at atmospheric pressure, as previously found for the TIP5P water model, but also at elevated pressures. This anomalous behavior of the thermal conductivity of supercooled water appears to be related to the maximum of the isothermal compressibility or the minimum of the speed of sound. However, the magnitudes of the simulated thermal conductivities are sensitive to the water model adopted and appear to be significantly larger than the experimental thermal conductivities of real water at low temperatures.

Bresme, F., E-mail: f.bresme@imperial.ac.uk [Chemical Physics Section, Department of Chemistry, Imperial College, London SW7 2AZ, United Kingdom and Department of Chemistry, Norwegian University of Science and Technology, Trondheim 7491 (Norway); Biddle, J. W.; Sengers, J. V.; Anisimov, M. A. [Institute for Physical Science and Technology, and Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742 (United States)] [Institute for Physical Science and Technology, and Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742 (United States)

2014-04-28T23:59:59.000Z

85

Comparative study of Waste Isolation Pilot Plant (WIPP) transportation alternatives  

SciTech Connect

WIPP transportation studies in the Final Supplement Environmental Impact Statement for WIPP are the baseline for this report. In an attempt to present the most current analysis, this study incorporates the most relevant data available. The following three transportation options are evaluated for the Disposal Phase, which is assumed to be 20 years: Truck shipments, consisting of a tractor and trailer, with three TRUPACT-IIs or one RH-72B; Regular commercial train shipments consisting of up to three railcars carrying up to 18 TRUPACT-IIs or up to six RH-72Bs; Dedicated train shipments consisting of a locomotive, an idle car, railcars carrying 18 TRUPACT-IIs or six RH-72Bs, another idle car, and a caboose or passenger car with an emergency response specialist. No other cargo is carried. This report includes: A consideration of occupational and public risks and exposures, and other environmental impacts; A consideration of emergency response capabilities; and An extimation of comparative costs.

Not Available

1994-02-01T23:59:59.000Z

86

Plan to Conduct Electric Transmission Congestion Study: Federal Register Volume 76, No. 218- Nov. 10, 2011  

Energy.gov (U.S. Department of Energy (DOE))

Section 216(a)(1) of the Federal Power Act (FPA) requires the Department of Energy to complete a study of electric transmission congestion every three years. On November 10, 2011, the Department issued a plan to conduct the current Congestion Study.

87

Transportation capabilities study of DOE-owned spent nuclear fuel  

SciTech Connect

This study evaluates current capabilities for transporting spent nuclear fuel owned by the US Department of Energy. Currently licensed irradiated fuel shipping packages that have the potential for shipping the spent nuclear fuel are identified and then matched against the various spent nuclear fuel types. Also included are the results of a limited investigation into other certified packages and new packages currently under development. This study is intended to support top-level planning for the disposition of the Department of Energy`s spent nuclear fuel inventory.

Clark, G.L.; Johnson, R.A.; Smith, R.W. [Packaging Technology, Inc., Tacoma, WA (United States); Abbott, D.G.; Tyacke, M.J. [Lockheed Idaho Technologies Co., Idaho Falls, ID (United States)

1994-10-01T23:59:59.000Z

88

Transportation  

Science Journals Connector (OSTI)

The romantic rides in Sandburgs eagle-car changed society. On the one hand, motor vehicle transportation is an integral thread of societys fabric. On the other hand, excess mobility fractures old neighborh...

David Hafemeister

2014-01-01T23:59:59.000Z

89

Study of Long-Term Transport Action Plan for ASEAN | Open Energy  

Open Energy Info (EERE)

Long-Term Transport Action Plan for ASEAN Long-Term Transport Action Plan for ASEAN Jump to: navigation, search Name Study of Long-Term Transport Action Plan for ASEAN Agency/Company /Organization Association of Southeast Asian Nations (ASEAN), Institution for Transport Policy Studies (ITPS), Clean Air Asia, Transport Research Laboratory (TRL), Mizuho Information & Research Institute (MHIR) Partner Nippon Foundation, Ministry of Planning, Ministry of Transport Sector Climate, Land Focus Area Greenhouse Gas, People and Policy, Transportation Topics Background analysis, Baseline projection, Co-benefits assessment, - Environmental and Biodiversity, GHG inventory, Low emission development planning, -LEDS, Pathways analysis, Policies/deployment programs Website http://cleanairinitiative.org/

90

TECH TRANSFER TECHNOLOGY TRANSFER PROGRAM INSTITUTE OF TRANSPORTATION STUDIES UNIVERSITY OF CALIFORNIA, BERKELEY  

E-Print Network (OSTI)

TECH TRANSFER TECHNOLOGY TRANSFER PROGRAM · INSTITUTE OF TRANSPORTATION STUDIES · UNIVERSITY THURSDAY SATURDAYFRIDAYWEDNESDAYTUESDAY TECHNOLOGY TRANSFER PROGRAM · INSTITUTE OF TRANSPORTATION STUDIES's to another year of working safer and smarter. Laura Melendy Director, Technology Transfer Program #12;AUGUST

California at Berkeley, University of

91

Computational study of the transport mechanisms of molecules and ions in solid materials  

E-Print Network (OSTI)

electrolytes is a key element in the development of the solid lithium ion batteries. One promising material is dilithium phthalocyanine (Li2Pc), which upon self-assembly may form conducting channels for fast ion transport. Computational chemistry is employed...

Zhang, Yingchun

2009-06-02T23:59:59.000Z

92

Atomistic Study of Transport Properties at the Nanoscale  

E-Print Network (OSTI)

- being probed in graphene, graphene nano ribbons, carbon nanotubes, and fullerenes to determine their influence on transport; overall, these structures yield a large range of thermal transport, 10-2500 W/mK....

Haskins, Justin

2013-01-11T23:59:59.000Z

93

Assessing Transportation Disadvantage and Public Transportation Opportunites in Rural Ontario: A Case Study of Huron County .  

E-Print Network (OSTI)

??In virtually all rural areas in Ontario the limited transportation alternatives means that rural residents without access to a personal vehicle are at great risk (more)

Marr, Eric

2012-01-01T23:59:59.000Z

94

Carbon Dioxide Transport and Storage Costs in NETL Studies  

NLE Websites -- All DOE Office Websites (Extended Search)

and Operations of Plant, Transport and Storage ... 10 Exhibit 2 Pipeline Cost Breakdown (2011 Dollars) 1, 2, 3 ......

95

UCSB 2010 Transportation Study Prepared Spring 2010 in collaboration with the Chancellor's Campus Sustainability  

E-Print Network (OSTI)

UCSB 2010 Transportation Study Prepared Spring 2010 in collaboration with the Chancellor's Campus transportation studies. The purposes of this report include: characterizing the commuting habits of UCSB of transportation; and helping estimate UCSB's scope 3 GHG emissions. Over time, consistent reporting of this data

Akhmedov, Azer

96

Studies of Transport Properties of Fractures: Final Report  

SciTech Connect

We proposed to study several key factors controlling the character and evolution of fracture system permeability and transport processes. We suggest that due to surface roughness and the consequent channeling in single fractures and in fracture intersections, the tendency of a fracture system to plug up, remain permeable, or for permeability to increase due to chemical dissolution/precipitation conditions will depend strongly on the instantaneous flow channel geometry. This geometry will change as chemical interaction occurs, thus changing the permeability through time. To test this hypothesis and advance further understanding toward a predictive capability, we endeavored to physically model and analyze several configurations of flow and transport of inert and chemically active fluids through channels in single fractures and through fracture intersections. This was an integrated program utilizing quantitative observations of fractures and veins in drill core, quantitative and visual observations of flow and chemical dissolution and precipitation within replicas of real rough-walled fractures and fracture intersections, and numerical modeling via lattice Boltzmann methods.

Stephen R. Brown

2006-06-30T23:59:59.000Z

97

Study on release and transport of aerial radioactive materials in reprocessing plants  

SciTech Connect

The release and transport characteristics of radioactive materials at a boiling accident of the high active liquid waste (HALW) in a reprocessing plant have been studied for improving experimental data of source terms of the boiling accident. In the study, a heating test and a thermogravimetry and differential thermal analysis (TG-DTA) test were conducted. In the heating test using a simulated HALW, it was found that ruthenium was mainly released into the air in the form of gas and that non-volatile elements were released into the air in the form of mist. In the TG-DTA test, the rate constants and reaction heat of thermal decomposition of ruthenium nitrosyl nitrate were obtained from TG and DTA curves. (authors)

Amano, Y.; Tashiro, S.; Uchiyama, G.; Abe, H.; Yamane, Y.; Yoshida, K. [Japan Atomic Energy Agency, 2-4 Shirane, Shirakata, Tokai-mura, Naka-gun, Ibaraki, 319-1195 (Japan); Kodama, T. [Japan Nuclear Fuel Ltd., 4-108 Okitsuke, Obuchi, Rokkasho-mura, Kamikita-gun, Aomori, 039-3212 (Japan)

2013-07-01T23:59:59.000Z

98

Study of some parameters interstellar transport using of magnetic umbrella  

E-Print Network (OSTI)

Interstellar transport is an object of interest in many sci-fi stories. In history a lot of sci-fi predictions have turned into reality, such as communications satellites, deep-sea submarines and journies to the moon. In this work we study some physical parameters of a space ship which uses a magnetic umbrella. Our spaceship generates a magnetic field in its neighborhood and captures charged protons into a magnetic trap. These particles are taken into a fusion reactor. The obtained energy and waste in form of helium are used as a fuel in an ion engine. With the help of elementary physics we can work out the basic physical parameters of the ship, e.g. maximal velocity, acceleration of the ship or acceleration time period.

Martin ?ermk

2013-01-28T23:59:59.000Z

99

Study of some parameters interstellar transport using of magnetic umbrella  

E-Print Network (OSTI)

Interstellar transport is an object of interest in many sci-fi stories. In history a lot of sci-fi predictions have turned into reality, such as communications satellites, deep-sea submarines and journies to the moon. In this work we study some physical parameters of a space ship which uses a magnetic umbrella. Our spaceship generates a magnetic field in its neighborhood and captures charged protons into a magnetic trap. These particles are taken into a fusion reactor. The obtained energy and waste in form of helium are used as a fuel in an ion engine. With the help of elementary physics we can work out the basic physical parameters of the ship, e.g. maximal velocity, acceleration of the ship or acceleration time period.

?ermk, Martin

2013-01-01T23:59:59.000Z

100

Theoretical study of particle transport in electron internal transport barriers in TCV  

SciTech Connect

Previous results from the analysis of fully non inductively sustained electron internal transport barriers (eITBs) in TCV show that a strong coupling exists between electron temperature and density profiles inside the barrier. A phenomenology that is completely different from the standard L-mode is observed . New experimental results assess transient phases to calculate particle convection and diffusion coefficients, allowing also to discuss the role of neoclassical transport. Gyrokinetic and gyrofluid analysis of steady-state eITBs provide tools to understand the mechanism that drive the observed density peaking in advanced scenarios with internal transport barriers and dominant electron heating.

Fable, E.; Sauter, O.; Marinoni, A.; Zucca, C. [Centre de Recherches en Physique des Plasmas, Association EURATOM -- Confederation Suisse, Ecole Polytechnique Federale de Lausanne (EPFL), CH-1015 Lausanne (Switzerland)

2006-11-30T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


101

Transportation  

NLE Websites -- All DOE Office Websites (Extended Search)

Due to limited parking, all visitors are strongly encouraged to: Due to limited parking, all visitors are strongly encouraged to: 1) car-pool, 2) take the Lab's special conference shuttle service, or 3) take the regular off-site shuttle. If you choose to use the regular off-site shuttle bus, you will need an authorized bus pass, which can be obtained by contacting Eric Essman in advance. Transportation & Visitor Information Location and Directions to the Lab: Lawrence Berkeley National Laboratory is located in Berkeley, on the hillside directly above the campus of University of California at Berkeley. The address is One Cyclotron Road, Berkeley, California 94720. For comprehensive directions to the lab, please refer to: http://www.lbl.gov/Workplace/Transportation.html Maps and Parking Information: On Thursday and Friday, a limited number (15) of barricaded reserved parking spaces will be available for NON-LBNL Staff SNAP Collaboration Meeting participants in parking lot K1, in front of building 54 (cafeteria). On Saturday, plenty of parking spaces will be available everywhere, as it is a non-work day.

102

Energy Policy Act transportation rate study: Interim report on coal transportation  

SciTech Connect

The primary purpose of this report is to examine changes in domestic coal distribution and railroad coal transportation rates since enactment of the Clean Air Act Amendments of 1990 (CAAA90). From 1988 through 1993, the demand for low-sulfur coal increased, as a the 1995 deadline for compliance with Phase 1 of CAAA90 approached. The shift toward low-sulfur coal came sooner than had been generally expected because many electric utilities switched early from high-sulfur coal to ``compliance`` (very low-sulfur) coal. They did so to accumulate emissions allowances that could be used to meet the stricter Phase 2 requirements. Thus, the demand for compliance coal increased the most. The report describes coal distribution and sulfur content, railroad coal transportation and transportation rates, and electric utility contract coal transportation trends from 1979 to 1993 including national trends, regional comparisons, distribution patterns and regional profiles. 14 figs., 76 tabs.

NONE

1995-10-01T23:59:59.000Z

103

INSTITUTE OF TRANSPORTATION STUDIES UNIVERSITY OF CALIFORNIA, BERKELEY  

E-Print Network (OSTI)

of street trees, attractive landscaping, street furniture, improved building facades, bike lanes are just a first step toward designing and implementing a sustainable transportation program for fast

Kammen, Daniel M.

104

E-Print Network 3.0 - ac conductivity studies Sample Search Results  

NLE Websites -- All DOE Office Websites (Extended Search)

Conductivity, Molecular... Dynamics Simulation, Thermal Conductance ABSTRACT Several heat transfer problems related to single... function between carbon and carbon within a...

105

Thermal conductivity studies of novel nanofluids based on metallic silver decorated mesoporous silica nanoparticles  

SciTech Connect

Graphical abstract: - Highlights: Metallic silver was decorated in mSiO{sub 2} with grafted hemiaminal functional groups. Synthesized nanoparticles were used for preparation of glycerol based nanofluids. The effect of temperature, weight fraction of mSiO{sub 2} and concentration of silver nanoparticles on thermal conductivity of nanofluids was investigated. - Abstract: In the present study, the mesoporous structure of silica (mSiO{sub 2}) nanoparticles as well as hemiaminal grafted mSiO{sub 2} decorated by metallic silver (Ag/mSiO{sub 2}) has been used for the preparation of glycerol based nanofluids. Structural and morphological characterization of the synthesized products have been carried out using Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM), X-ray diffraction (XRD), UVvis spectroscopy, inductively coupled plasma (ICP) and N{sub 2} adsorptiondesorption isotherms. The thermal conductivity and viscosity of the nanofluids have been measured as a function of temperature for various weight fractions and silver concentrations of mSiO{sub 2} and Ag/mSiO{sub 2} nanoparticles, respectively. The results show that the thermal conductivity of the nanofluids increase up to 9.24% as the weight fraction of mSiO{sub 2} increases up to 4 wt%. Also, increasing the percent of the silver decorated mSiO{sub 2} (Ag/mSiO{sub 2}) up to 2.98% caused an enhancement in the thermal conductivity of the base fluid up to 10.95%. Furthermore, the results show that the nanofluids have Newtonian behavior in the tested temperature range for various concentrations of nanoparticles.

Tadjarodi, Azadeh, E-mail: tajarodi@iust.ac.ir [Research Laboratory of Inorganic Materials Synthesis, Department of Chemistry, Iran University of Science and Technology, 16846-13114 Tehran (Iran, Islamic Republic of); Zabihi, Fatemeh [Research Laboratory of Inorganic Materials Synthesis, Department of Chemistry, Iran University of Science and Technology, 16846-13114 Tehran (Iran, Islamic Republic of); Chemistry and Nanotechnology Laboratory, National Center for Laser Science and Technology, Tehran (Iran, Islamic Republic of)

2013-10-15T23:59:59.000Z

106

Spin transport in inhomogeneous magnetic fields:?A proposal for Stern-Gerlach-like experiments with conduction electrons  

Science Journals Connector (OSTI)

Spin dynamics in spatially inhomogeneous magnetic fields is studied within the framework of Boltzmann theory. Stern-Gerlach-like separation of spin up and spin down electrons occurs in ballistic and diffusive regimes, before spin relaxation sets in. Transient dynamics and spectral response to time-dependent inhomogeneous magnetic fields are investigated, and possible experimental observations of our findings are discussed.

Jaroslav Fabian and S. Das Sarma

2002-07-26T23:59:59.000Z

107

Review of Helium and Xenon Pure Component and Mixture Transport Properties and Recommendation of Estimating Approach for Project Prometheus (Viscosity and Thermal Conductivity)  

SciTech Connect

The selected configuration for the Project Prometheus Space Nuclear Power Plant was a direct coupling of Brayton energy conversion loop(s) to a single reactor heat source through the gas coolant/working fluid. A mixture of helium (He) and xenon (Xe) gas was assumed as the coolant/working fluid. Helium has superior thermal conductivity while xenon is added to increase the gas atomic weight to benefit turbomachinery design. Both elements have the advantage of being non-reactive. HeXe transport properties (viscosity and thermal conductivity) were needed to calculate pressure drops and heat transfer rates. HeXe mixture data are limited, necessitating the use of semi-empirical correlations to calculate mixture properties. Several approaches are available. Pure component properties are generally required in the mixture calculations. While analytical methods are available to estimate pure component properties, adequate helium and xenon pure component data are available. This paper compares the sources of pure component data and the approaches to calculate mixture properties. Calculated mixture properties are compared to the limited mixture data and approaches are recommended to calculate both pure component and mixture properties. Given the limited quantity of HeXe mixture data (all at one atmosphere), additional testing may have been required for Project Prometheus to augment the existing data and confirm the selection of mixture property calculation methods.

Haire, Melissa A.; Vargo, David D. [Bechtel Bettis, Inc., Bettis Atomic Power Laboratory, P.O. Box 79, West Mifflin, PA 15122 (United States)

2007-01-30T23:59:59.000Z

108

Dynamic Conductance of Carbon Nanotubes  

Science Journals Connector (OSTI)

The dynamic conductance of carbon nanotubes was investigated using the nonequilibrium Green's function formalism within the context of a tight-binding model. Specifically, we have studied the ac response of tubes of different helicities, both with and without defects, and an electronic heterojunction. Because of the induced displacement currents, the dynamic conductance of the nanotubes differs significantly from the dc conductance displaying both capacitive and inductive responses. The important role of photon-assisted transport through nanotubes is revealed and its implications for experiments discussed.

Christopher Roland; Marco Buongiorno Nardelli; Jian Wang; Hong Guo

2000-03-27T23:59:59.000Z

109

ACET (VREF African FUT CoE for Studies in Public and Non-motorised Transport) Centre for Transport Studies  

E-Print Network (OSTI)

.Behrens@uct.ac.za UNIVERSITY OF NAIROBIUNIVERSITY OF DAR ES SALAAM Department of Transportation and Geotechnical Engineering University of Dar es Salaam TANZANIA Tel: +255 (22) 2410 501 Email: mfinanga@ce.udsm.ac.tz Institute of Transportation and Geotechnical Engineering, University of Dar es Salaam 1. Dr Hannibal Bwire 2. Dr Estomihi

California at Berkeley, University of

110

Molecular Dynamics Study of the Proposed Proton Transport Pathways...  

NLE Websites -- All DOE Office Websites (Extended Search)

observations. This channel connects the surface of the enzyme and the di-thiomethylamine bridge of the catalytic H-cluster, permitting the transport of protons. The channel was...

111

Transport and Mixing Patterns over Central California during the Carbonaceous Aerosol and Radiative Effects Study (CARES)  

SciTech Connect

We describe the synoptic and regional-scale meteorological conditions that affected the transport and mixing of trace gases and aerosols in the vicinity of Sacramento, California during June 2010 when the Carbonaceous Aerosol and Radiative Effects Study (CARES) was conducted. The meteorological measurements collected by various instruments deployed during the campaign and the performance of the chemistry version of the Weather Research and Forecasting model (WRF-Chem) are both discussed. WRF-Chem was run daily during the campaign to forecast the spatial and temporal variation of carbon monoxide emitted from 20 anthropogenic source regions in California to guide aircraft sampling. The model is shown to reproduce the overall circulations and boundary-layer characteristics in the region, although errors in the upslope wind speed and boundary-layer depth contribute to differences in the observed and simulated carbon monoxide. Thermally-driven upslope flows that transported pollutants from Sacramento over the foothills of the Sierra Nevada occurred every afternoon, except during three periods when the passage of mid-tropospheric troughs disrupted the regional-scales flow patterns. The meteorological conditions after the passage of the third trough were the most favorable for photochemistry and likely formation of secondary organic aerosols. Meteorological measurements and model forecasts indicate that the Sacramento pollutant plume was likely transported over a downwind site that collected trace gas and aerosol measurements during 23 periods; however, direct transport occurred during only eight of these periods. The model also showed that emissions from the San Francisco Bay area transported by intrusions of marine air contributed a large fraction of the carbon monoxide in the vicinity of Sacramento, suggesting that this source likely affects local chemistry. Contributions from other sources of pollutants, such as those in the Sacramento Valley and San Joaquin Valley, were relatively low. Aerosol layering in the free troposphere was observed during the morning by an airborne Lidar; WRF-Chem forecasts showed that mountain venting processes contributed to aged pollutants aloft in the valley atmosphere which then can be entrained into the growing boundary layer the subsequent day.

Fast, Jerome D.; Gustafson, William I.; Berg, Larry K.; Shaw, William J.; Pekour, Mikhail S.; Shrivastava, ManishKumar B.; Barnard, James C.; Ferrare, R.; Hostetler, Chris A.; Hair, John; Erickson, Matthew H.; Jobson, Tom; Flowers, Bradley; Dubey, Manvendra K.; Springston, Stephen R.; Pirce, Bradley R.; Dolislager, Leon; Pederson, J. R.; Zaveri, Rahul A.

2012-02-17T23:59:59.000Z

112

Transport and mixing patterns over Central California during the carbonaceous aerosol and radiative effects study (CARES)  

SciTech Connect

We describe the synoptic and regional-scale meteorological conditions that affected the transport and mixing of trace gases and aerosols in the vicinity of Sacramento, California during June 2010 when the Carbonaceous Aerosol and Radiative Effects Study (CARES) was conducted. The meteorological measurements collected by various instruments deployed during the campaign and the performance of the chemistry version of the Weather Research and Forecasting model (WRF-Chem) are both discussed. WRF-Chem was run daily during the campaign to forecast the spatial and temporal variation of carbon monoxide emitted from 20 anthropogenic source regions in California to guide aircraft sampling. The model is shown to reproduce the overall circulations and boundary-layer characteristics in the region, although errors in the upslope wind speed and boundary-layer depth contribute to differences in the observed and simulated carbon monoxide. Thermally-driven upslope flows that transported pollutants from Sacramento over the foothills of the Sierra Nevada occurred every afternoon, except during three periods when the passage of mid-tropospheric troughs disrupted the regional-scale flow patterns. The meteorological conditions after the passage of the third trough were the most favorable for photochemistry and likely formation of secondary organic aerosols. Meteorological measurements and model forecasts indicate that the Sacramento pollutant plume was likely transported over a downwind site that collected trace gas and aerosol measurements during 23 time periods; however, direct transport occurred during only eight of these periods. The model also showed that emissions from the San Francisco Bay area transported by intrusions of marine air contributed a large fraction of the carbon monoxide in the vicinity of Sacramento, suggesting that this source likely affects local chemistry. Contributions from other sources of pollutants, such as those in the Sacramento Valley and San Joaquin Valley, were relatively low. Aerosol layering in the free troposphere was observed during the morning by an airborne Lidar. WRF-Chem forecasts showed that mountain venting processes contributed to aged pollutants aloft in the valley atmosphere that are then entrained into the growing boundary layer the subsequent day.

Fast J. D.; Springston S.; GustafsonJr., W. I.; Berg, L. K.; Shaw, W. J.; Pekour, M.; Shrivastava, M.; Barnard, J. C.; Ferrare, R. A.; Hostetler, C. A.; Hair, J. A.; Erickson, M.; Jobson, B. T.; Flowers, B.; Dubey, M. K.; Pierce, R. B.; Dolislager, L.; Pederson, J.; Zaveri, R. A.

2012-02-17T23:59:59.000Z

113

On a novel rate theory for transport in narrow ion channels and its application to the study of flux optimization via geometric effects  

E-Print Network (OSTI)

On a novel rate theory for transport in narrow ion channels and its application to the study passage time to describe single-ion conduction in narrow, effectively one-dimensional membrane channels. DOI: 10.1063/1.3077205 I. INTRODUCTION Ion channels are membrane proteins which enable se- lected ions

Reingruber, Jürgen

114

Selection of Conductive Additives in Li-Ion Battery Cathodes A Numerical Study  

E-Print Network (OSTI)

- capacity LiNi1-xCoxO2 to lower cost LiNi1-xCoxO2. The addition of conductive additives to cathode materials significantly improve overall conductivity. Percolation was achieved for the volume fraction of active material particulate system. Neither surface nor bulk modifications of active-material particle conductivities seem

Sastry, Ann Marie

115

Adolescent conduct problems and later risk of induced abortion: A population-based longitudinal study  

E-Print Network (OSTI)

MEMORANDUM No 6:2007 Adolescent conduct problems and later risk of induced abortion: A population://www.iss.uio.no/forskning/memoranda.html #12;ii Adolescent conduct problems and later risk of induced abortion: A population- based and abortion. #12;iii Conclusions: Girls with conduct problems in early adolescence are at risk for induced

Løw, Erik

116

DOE-HDBK-1116-98; Guide to Good Practices for Developing and Conducting Case Studies  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6-98 6-98 January 1998 Superseding DOE-STD-1058-93 DOE HANDBOOK GUIDE TO GOOD PRACTICES FOR DEVELOPING AND CONDUCTING CASE STUDIES U.S. Department of Energy AREA TRNG Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. This document has been reproduced directly from the best available copy. Available to DOE and DOE contractors from the Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, TN 37831; (423) 576-8401. Available to the public from the U.S. Department of Commerce, Technology Administration, National Technical Information Service, Springfield, VA 22161; (703) 605-6000. Order No. DE98001291 DOE-HDBK-1116-98 iii FOREWORD 1. This Department of Energy (DOE) Handbook is approved for use by all DOE Components

117

Jefferson Orange Hardin Regional Transportation Study 2007 Metropolitan Transportation Plan - 2030  

E-Print Network (OSTI)

vehicle. ? Promote operational efficiency through the use of technological improvements. ? Support measures that reduce traffic congestion and peak hour travel demand. Goal #3: Enhance the Safety of the Transportation Community. Public safety is a... evacuation routes or prevent rail/vehicle accidents at railway crossings. Objectives: ? Promote programs and projects that reduce the number and severity of traffic accidents, especially at railroad crossings. ? Give priority to construction projects...

South East Texas Regional Planning Commission

2007-04-12T23:59:59.000Z

118

Crystallographic study of FABP5 as an intracellular endocannabinoid transporter  

Science Journals Connector (OSTI)

FABP5 was recently found to intracellularly transport endocannabinoid signaling lipids. The structures of FABP5 complexed with two endocannabinoids and an inhibitor were solved. Human FABP5 was found to dimerize via a domain-swapping mechanism. This work will help in the development of inhibitors to raise endocannabinoid levels.

Sanson, B.

2014-01-29T23:59:59.000Z

119

Energy Policy Act transportation rate study: Availability of data and studies  

SciTech Connect

Pursuant to Section 1340(c) of the Energy Policy Act of 1992 (EPACT), this report presents the Secretary of Energy`s review of data collected by the Federal Government on rates for rail and pipeline transportation of domestic coal, oil, and gas for the years 1988 through 1997, and proposals to develop an adequate data base for each of the fuels, based on the data availability review. This report also presents the Energy Information Administration`s findings regarding the extent to which any Federal agency is studying the impacts of the Clean Air Act Amendments of 1990 (CAAA90) and other Federal policies on the transportation rates and distribution patterns of domestic coal, oil, and gas.

Not Available

1993-10-13T23:59:59.000Z

120

A study of the magnetic compression of energetic ion layers in conductive plasmas  

SciTech Connect

Results of a study of the magnetic compression of one-dimensional energetic ion layers in the presence of conductive background plasmas in cylindrical geometry are presented. For this, an updated hybrid (particle-ion and fluid-electron) computer model has been used. The first observation is that when the magnetic field at the wall is ramped quickly relative to the radial Alfven wave transit time across the cylinder then a magnetic probe on axis would measure a larger field perturbation. When the wall field is ramped slowly, the layer energy increases proportionally with the external magnetic-field strength and, as expected, the layer self-field on axis does not change relative to external field. A study is also made of the effects of transient fluctuations on the layer energy when the field is ramped quickly. When the ramped field strength is small compared with the ambient field (the linear case), the average layer kinetic energy gained is not substantially different from the case where ramping is slow; however, the fluctuating energy is more than twice the average change. The interesting observation is made that the thermal spread in particle energy for a layer is not necessarily related to the strength of the self-field. This is explained in terms of the single particle motion in a self-potential well, and is different from the expected result for a two-dimensional ring.

Lyster, P.M. (Institute for Fusion Studies, The University of Texas at Austin, Austin, Texas 78712 (United States)); Sudan, R.N. (Laboratory of Plasma Studies, Cornell University, Ithaca, New York 14853 (United States))

1994-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
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121

Energy stability bounds on convective heat transport: Numerical study  

SciTech Connect

The concept of nonlinear energy stability has recently been extended to deduce bounds on energy dissipation and transport in incompressible flows, even for turbulent flows. In this approach an effective stability condition on {open_quotes}background{close_quotes} flow or temperature profiles is derived, which when satisfied ensures that the profile produces a rigorous upper estimate to the bulk dissipation. Optimization of the test background profiles in search of the lowest upper bounds leads to nonlinear Euler-Lagrange equations for the extremal profile. In this paper, in the context of convective heat transport in the Boussinesq equations, we describe numerical solutions of the Euler-Lagrange equations for the optimal background temperature and present the numerical computation of the implied bounds. {copyright} {ital 1997} {ital The American Physical Society}

Doering, C.R. [Department of Mathematics, University of Michigan, Ann Arbor, Michigan 48109-1109 (United States)] [Department of Mathematics, University of Michigan, Ann Arbor, Michigan 48109-1109 (United States); Hyman, J.M. [Theoretical Division and Center for Nonlinear Studies, MS-B284, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Theoretical Division and Center for Nonlinear Studies, MS-B284, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

1997-06-01T23:59:59.000Z

122

Membrane vesicles: A simplified system for studying auxin transport  

SciTech Connect

Indoleacetic acid (IAA), the auxin responsible for regulation of growth, is transported polarly in plants. Several different models have been suggested to account for IAA transport by cells and its accumulation by membrane vesicles. One model sees diffusion of IAA driven by a pH gradient. The anion of a lipophilic weak acid like IAA or butyrate accumulates in an alkaline compartment in accord with the size of the pH gradient The accumulation of IAA may be diminished by the permeability of its lipophilic anion. This anion leak may be blocked by NPA. With anion efflux blocked, a gradient of two pH units would support an IAA accumulation of less than 50-fold at equilibrium (2) Another model sees diffusion of IAA in parallel with a saturable symport (IAA[sup [minus

Goldsmith, M.H.M.

1989-01-01T23:59:59.000Z

123

Field studies of virus transport in a heterogeneous sandy aquifer  

E-Print Network (OSTI)

for unsaturated- snd saturated-zone modeling, respectively. Each module contains ground water flow and viral transport models. The steady ground water flow fields in both zones are determined semi- analytically. Following the ground water flow computation... utilizes tubing attached to a submersible pump which fits inside the monitoring well. The pump is lowered to the desired depth and the satnple retrieved. These pumps can be dedicated to the well and are available for AC or DC power sources. A portable...

Vogel, Jason Robert

2012-06-07T23:59:59.000Z

124

Study of Electron Transport and Amplification in Diamond  

SciTech Connect

As a successful completion of this award, my group has demonstrated world-leading electron gain from diamond for use in a diamond-amplified photocathode. Also, using high-resolution photoemission measurements we were able to uncover exciting new physics of the electron emission mechanisms from hydrogen terminated diamond. Our work, through the continued support of HEP, has resulted in a greater understanding of the diamond material science, including current limits, charge transport modeling, and spatial uniformity.

Muller, Erik M.; Ben-Zvi, Ilan

2013-03-31T23:59:59.000Z

125

Sustainable Campus Transportation through Transit Partnership and Transportation Demand Management: A Case Study from the University of Florida  

E-Print Network (OSTI)

A. 2005. The impacts of transportation demand management andUnlimited access. Transportation 28 (3): 233267. Cervero,transit. Journal of Public Transportation 3 (4):1019. ???.

Bond, Alex; Steiner, Ruth

2006-01-01T23:59:59.000Z

126

DOE Order Self Study Modules - DOE O 422.1, Conduct of Operations  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

422.1 422.1 CONDUCT OF OPERATIONS DOE O 422.1 Conduct of Operations Familiar Level June 2011 1 June 2011 DOE O 422.1 CONDUCT OF OPERATIONS FAMILIAR LEVEL OBJECTIVES Given the familiar level of this module and the resources listed below, you will be able to answer the following questions: 1. What is the purpose of DOE O 422.1, Conduct of Operations? 2. What are the typical methods of implementing DOE O 422.1 guidelines? 3. What are the specific requirements as described in attachment 2 of DOE O 422.1? 4. How do the DOE Technical Standards support the specific requirements in DOE O 422.1 Note: If you think that you can complete the practice at the end of this level without working through the instructional material and/or the examples, complete the practice

127

Study on the heat conduction of phase-change material microcapsules  

Science Journals Connector (OSTI)

The 3? approach was used to measure the effective thermal conductivity of phase-change material microcapsules (PCMMs) based on urea formaldehyde ... PCMMs with different densities were measured within the phase-change

Gangtao Zhao; Xiaohui Xu; Lin Qiu; Xinghua Zheng; Dawei Tang

2013-06-01T23:59:59.000Z

128

Study of Impurity Distributions (Mainly Lithium in Silicon) Using ac Hopping Conduction  

Science Journals Connector (OSTI)

The results of previous studies on ac impurity conduction are applied in an attempt to study the distribution of impurities when this is not random. The present study applies mostly to the distribution of lithium in silicon, but a few other situations are also examined. A possibility is presented, on a theoretical basis, to determine experimentally the complete distribution function of the distances between minority impurities and their nearest-neighbor majority impurities. It is found, however, that the experimental methods which are required must be more sensitive than methods thus far employed. A less quantitative method for determining the distribution is also proposed. It utilizes previously derived similarity relations which make it possible to compare experimental results on one sample with results on another where the distribution is known to be random. The latter have been reported in the literature by S. Golin. This method is used successfully in the present paper. The following cases are examined: (1) All the impurities are added to the melt before crystallization. (2) Acceptors are added to the melt, but the donors (lithium) are diffused into the crystallized material at 400C. All the data, except for Golin's samples which serve as the standard, refer to silicon. The experimental data for the first category are taken from the literature. For the second category they are reported in this paper. The results are as follows: Materials where all the impurities were introduced before crystallization indicate that the distribution of impurities is random, or very close to it. In lithium-doped samples, the randomness of the distribution depends on various conditions. A dramatic difference between oxygen-poor and oxygen-rich samples is observed. Oxygen-rich samples, n- or p-type, always exhibit a random distribution. This indicates that oxygen inhibits the mobility of lithium. In oxygen-poor samples, n- and p-type, the distribution depends on the temperature from which the samples were quenched. When this temperature is in excess of 200C, the distribution is again random, or very close to it. For lower temperatures, the distribution deviates from random. To explain the results, one has to assume either pairs with relatively large separations compared to those occurring in the theory of Reiss, Fuller, and Morin,r with traps of the nature described by Tanaka and Fan. The latter is found to be the likely explanation. The distance of closest approach between the lithium and boron atoms in silicon is calculated to be 2.870.03 , in good agreement with Morin's results on aluminum and lithium.

M. Pollak and D. H. Watt

1965-10-04T23:59:59.000Z

129

Hydrologic Tracer Studies Conducted August 20 - 25, 1962 Near Cape Thompson, Alaska  

Office of Legacy Management (LM)

S S T A T E DIEPAR- O F THE IlVTERIGR GEOLOGICAL SURVEX Federal Cenzer, Denver 2 5 , C a l o r a a o DATA RELEASE - Sept. 1 0 , 1963 HYDROLOGIC TRACEEI STUDIES CONDUCTED A U G ~ T 20-25, 1962 NEAR CAPE THOMPSON, ALASKA V. J. Janzer and W. A. Beetem . . . . . . . . . . . . . . . . . . . . . . I n t r o d u c t i o n . . . . . . . . . . . . . . . . . . . . P l o t ? r e p a r a t i o n . . . . . . . . . . . . D i s t r i b u t i o n c o e f f i c i e n t s , f i e l d . . . . . . . . . D i s t r i b u t i o n c o e f f i c i e n t s , l a b o r a t o r y , . . . . . . . . . . . . . . . . L n f i l t r a t i c n e q e r i m e n t . - . . . . . . . . . . . . . . . . Stream d i s p e r s i o n s t u d y . . . . . . . . . . . . . . . . Sedan event f z l l o u t p l o t s . . . . . . . . . . . . . . . . . . . . . References c i t e d ILLUSTRATIONS Figure I . Summed c o u n t s removed from cesium s o i l by s u c c e s s i v e e q u i l i b r a t i o n s , . . . . . . . . 2. S m e d c o u n t s removed from s t r o n t i u m s o i l by s u c c e s s i v e e a - u i l i b r a t i o n s . . . . . . . . . 3. P l

130

Modeling Studies on the Transport of Benzene and H2S in CO2-Water Systems  

E-Print Network (OSTI)

interest in subcritical (hot/liquid) water from 298 K to 473subcritical region. Modeling Studies on the Transport of Benzene and H 2 S in CO 2 -Water

Zheng, L.

2011-01-01T23:59:59.000Z

131

Simulation Study of Heat Transportation in an Aquifer about Well-water-source Heat Pump  

E-Print Network (OSTI)

The study of groundwater reinjection, pumping and heat transportation in an aquifer plays an important theoretical role in ensuring the stability of deep-well water reinjection and pumping as well as smooth reinjection. Based on the related...

Cong, X.; Liu, Y.; Yang, W.

2006-01-01T23:59:59.000Z

132

Transport Studies Enabling Efficiency Optimization of Cost-Competitive Fuel Cell Stacks  

NLE Websites -- All DOE Office Websites (Extended Search)

AURORA Program Overview Topic 4A. Transport within the PEM Stack / Transport Studies Transport Studies Enabling Efficiency Optimization of Cost-Competitive Fuel Cell Stacks Award#: DE-EE0000472 US DOE Fuel Cell Projects Kickoff Meeting Washington, DC September 30, 2009 Program Objectives The objective of this program is to optimize the efficiency of a stack technology meeting DOE cost targets. As cost reduction is of central importance in commercialization, the objective of this program addresses all fuel cell applications. AURORA C. Performance Technical Barriers Premise: DOE cost targets can be met by jointly exceeding both the Pt loading (1.0 W/cm2) targets.

133

Preliminary study on high temperature transport technology for molten salt in pyroprocessing  

Science Journals Connector (OSTI)

Pyroprocessing technology is one of the most promising technologies for an advanced fuel cycle with favorable economic potential and intrinsic proliferation-resistance. In pyroprocessing technology, the development of high-temperature transport technologies for molten salt is a crucial prerequisite and a key issue in the industrialization of pyro-reprocessing. However, there have been a few transport studies on high-temperature molten salt. Three different salt transport technologies (gravity, suction pump, and centrifugal pump) were investigated, a suction pump transport method was selected for molten salt transport owing to its flexibility. An apparatus for suction transport experiments was designed and installed for the development of high temperature molten salt transport technology. About 2kg of LiClKCl eutectic salt was prepared by mixing 99.0%, LiCl and \\{KCl\\} and drying in a convection dry oven at 200C for 1h. Predissolution tests of the prepared LiClKCl eutectic salt using the melting reactor of the experimental apparatus was carried out to investigate the dissolution behavior of the prepared LiClKCl eutectic salt. From the results of the pre-dissolution test, it was found that prepared LiClKCl eutectic salt was well dissolved at 500C. High temperature molten salt transport experiments by suction are currently being performed using the prepared LiCKCl eutectic salt. The preliminary experimental results of lab-scale molten salt transport showed a 99.5% transport rate (ratio of transported salt to total salt) under a vacuum range of 100mtorr10torr at 500C.

Sung Ho Lee; Hansoo Lee; Jeong-Guk Kim

2013-01-01T23:59:59.000Z

134

Heat Exchanger Design Options and Tritium Transport Study for the VHTR System  

SciTech Connect

This report presents the results of a study conducted to consider heat exchanger options and tritium transport in a very high temperature reactor (VHTR) system for the Next Generation Nuclear Plant Project. The heat exchanger options include types, arrangements, channel patterns in printed circuit heat exchangers (PCHE), coolant flow direction, and pipe configuration in shell-and-tube designs. Study considerations include: three types of heat exchanger designs (PCHE, shell-and-tube, and helical coil); single- and two-stage unit arrangements; counter-current and cross flow configurations; and straight pipes and U-tube designs in shell-and-tube type heat exchangers. Thermal designs and simple stress analyses were performed to estimate the heat exchanger options, and the Finite Element Method was applied for more detailed calculations, especially for PCHE designs. Results of the options study show that the PCHE design has the smallest volume and heat transfer area, resulting in the least tritium permeation and greatest cost savings. It is theoretically the most reliable mechanically, leading to a longer lifetime. The two-stage heat exchanger arrangement appears to be safer and more cost effective. The recommended separation temperature between first and second stages in a serial configuration is 800oC, at which the high temperature unit is about one-half the size of the total heat exchanger core volume. Based on simplified stress analyses, the high temperature unit will need to be replaced two or three times during the plants lifetime. Stress analysis results recommend the off-set channel pattern configuration for the PCHE because stress reduction was estimated at up to 50% in this configuration, resulting in a longer lifetime. The tritium transport study resulted in the development of a tritium behavior analysis code using the MATLAB Simulink code. In parallel, the THYTAN code, previously performed by Ohashi and Sherman (2007) on the Peach Bottom data, was revived and verified. The 600 MWt VHTR core input file developed in preparation for the transient tritium analysis of VHTR systems was replaced with the original steady-state inputs for future calculations. A Finite Element Method analysis was performed using COMSOL Multiphysics software to accurately predict tritium permeation through the PCHE type heat exchanger walls. This effort was able to estimate the effective thickness for tritium permeations and develop a correlation for general channel configurations, which found the effective thickness to be much shorter than the average channel distance because of dead spots on the channel side.

Chang H. Oh; Eung S. Kim

2008-09-01T23:59:59.000Z

135

Conductivity and X-ray photoelectron studies on lithium acetate doped chitosan films  

Science Journals Connector (OSTI)

Chitosan, ethylene carbonate (EC) and lithium acetate (LiOAc) were mixed in the desired proportions and dissolved in 100 ml of 1% acetic acid solutions. The solutions were then poured into various petri dishes and left to form films at room temperature. Complexation was confirmed by X-ray photoelectron spectroscopy (XPS). The lithium signal can be deconvoluted into three gaussian component peaks. One of the peaks at ?55eV is attributed to LiN interaction. The nitrogen signal can be deconvoluted into two gaussian component peaks. The peak at ?403.1eV is attributed to NLi interaction. The electrical conductivity of all samples was calculated using the bulk resistance value obtained from the complex impedance plot in the frequency range between 1 kHz and 1 MHz. The highest electrical conductivity obtained for the film containing LiOAc is 7.610?6Scm?1 at room temperature. The plot of conductivity, ? versus dopant content indicates that ? increases with increasing dopant content up to a dopant amount of 0.8 g LiOAc. The plot of ln?T versus 103/T for each lithium acetate sample between 298 and 363 K shows beys Arrhenius behavior indicating that the conductivity occurs by way of some thermally assisted mechanism. The chitosan based samples may have potential use in replacing the liquid components of electrochromic devices.

M.Z.A. Yahya; A.K. Arof

2004-01-01T23:59:59.000Z

136

Simulation Study of the Correlation between Structure and Conductivity in Stretched Elshad Allahyarov*  

E-Print Network (OSTI)

of many hydrogen fuel cells. In these materials, the interplay among the short-range interactions between in fuel cells containing these membranes. Proton conduction itself is a complex process, which strongly depends on the thermal and mechanical history of the membrane.4-6 The mechanical history involves

Taylor, Philip L.

137

Scaling of the conductance in gold nanotubes  

Science Journals Connector (OSTI)

A new form of gold nanobridges has been recently observed in ultrahigh-vacuum experiments, where gold atoms rearrange to build helical nanotubes, akin in some respects to carbon nanotubes. The good reproducibility of these wires and their unexpected stability allow for conductance measurements and make them promising candidates for future applications. We present here a study of the transport properties of these nanotubes in order to understand the role of chirality and of the different orbitals in quantum transport observables. The conductance per atomic row shows a light decreasing trend as the diameter grows, which is also shown through an analytical formula based on a one-orbital model.

Miriam del Valle; Carlos Tejedor; Gianaurelio Cuniberti

2006-07-10T23:59:59.000Z

138

Thermal Conductance of Thin Silicon Nanowires  

Science Journals Connector (OSTI)

The thermal conductance of individual single crystalline silicon nanowires with diameters less than 30nm has been measured from 20to 100K. The observed thermal conductance shows unusual linear temperature dependence at low temperatures, as opposed to the T3 dependence predicted by the conventional phonon transport model. In contrast to previous models, the present study suggests that phonon-boundary scattering is highly frequency dependent, and ranges from nearly ballistic to completely diffusive, which can explain the unexpected linear temperature dependence.

Renkun Chen, Allon I. Hochbaum, Padraig Murphy, Joel Moore, Peidong Yang, and Arun Majumdar

2008-09-02T23:59:59.000Z

139

Texas Transportation Poll (TTP) Data Documentation The dataset and code book has been provided, so that researchers interested in conducting their own  

E-Print Network (OSTI)

Texas Transportation Poll (TTP) Data Documentation The dataset and code book) contains basic information about all the variables in the dataset. The second part been cleaned. The expanded weight has also been included in the dataset

140

Proton Transport in Triflic Acid Hydrates Studied via Path Integral Car?Parrinello Molecular Dynamics  

Science Journals Connector (OSTI)

Proton Transport in Triflic Acid Hydrates Studied via Path Integral Car?Parrinello Molecular Dynamics ... The mono-, di-, and tetrahydrates of trifluoromethanesulfonic acid, which contain characteristic H3O+, H5O2+, and H9O4+ structures, provide model systems for understanding proton transport in materials with high perfluorosulfonic acid density such as perfluorosulfonic acid membranes commonly employed in hydrogen fuel cells. ... Hydrogen is described as a promising future fuel if the fuel cell technol. ...

Robin L. Hayes; Stephen J. Paddison; Mark E. Tuckerman

2009-12-07T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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141

August 22, 2012 (v. 5) Summary of Studies Related to Hydraulic Fracturing Conducted by USGS Water Science Centers  

E-Print Network (OSTI)

August 22, 2012 (v. 5) Summary of Studies Related to Hydraulic Fracturing Conducted by USGS Water and hydraulic fracturing on groundwater and surface-water quantity and quality and ecosystems. "On ­ Maps related to oil and gas production and hydraulic fracturing are included in the USGS Fact Sheet

142

Thermal Conductivity in Nanocrystalline Ceria Thin Films  

SciTech Connect

The thermal conductivity of nanocrystalline ceria films grown by unbalanced magnetron sputtering is determined as a function of temperature using laser-based modulated thermoreflectance. The films exhibit significantly reduced conductivity compared with stoichiometric bulk CeO2. A variety of microstructure imaging techniques including X-ray diffraction, scanning and transmission electron microscopy, X-ray photoelectron analysis, and electron energy loss spectroscopy indicate that the thermal conductivity is influenced by grain boundaries, dislocations, and oxygen vacancies. The temperature dependence of the thermal conductivity is analyzed using an analytical solution of the Boltzmann transport equation. The conclusion of this study is that oxygen vacancies pose a smaller impediment to thermal transport when they segregate along grain boundaries.

Marat Khafizov; In-Wook Park; Aleksandr Chernatynskiy; Lingfeng He; Jianliang Lin; John J. Moore; David Swank; Thomas Lillo; Simon R. Phillpot; Anter El-Azab; David H. Hurley

2014-02-01T23:59:59.000Z

143

Study of ice and snow melting process on conductive asphalt solar collector  

Science Journals Connector (OSTI)

This paper investigates the snow melting process on asphalt pavements as solar collector by experiments and numerical simulation. A numerical simulation method was used to predict the general design requirements for snow melting system of asphalt pavements, and a type of experimental asphalt snow melting system has been built using the design parameters obtained from the preceding simulation. Graphite powders were used to improve the thermal conductivity of asphalt concrete and thus resulting in an improved efficiency of asphalt collector. A laboratory snow melting test was performed after real snowstorm events. The effects of thermal conductive asphalt concrete (CAC) on snow melting performance and asphalt pavement temperature distribution were evaluated. The heat transfer in the asphalt slabs and the heat requirement for the snow melting were analyzed. The results that are obtained show that asphalt solar collector (ASC) provides us a better alternative method for snow melting. The higher fluid temperature is a positive way to improve the performance of snow melting system. However, it is unnecessary to keep a too high fluid temperature so as to reduce the waste of energy. The non-uniform temperatures in the asphalt slabs are noticeable. Furthermore, the heat-transmission and the snow melting performance can be enhanced using CAC.

Mingyu Chen; Shaopeng Wu; Hong Wang; Jizhe Zhang

2011-01-01T23:59:59.000Z

144

Conductive Polymers  

SciTech Connect

Electroluminescent devices such as light-emitting diodes (LED) and high-energy density batteries. These new polymers offer cost savings, weight reduction, ease of processing, and inherent rugged design compared to conventional semiconductor materials. The photovoltaic industry has grown more than 30% during the past three years. Lightweight, flexible solar modules are being used by the U.S. Army and Marine Corps for field power units. LEDs historically used for indicator lights are now being investigated for general lighting to replace fluorescent and incandescent lights. These so-called solid-state lights are becoming more prevalent across the country since they produce efficient lighting with little heat generation. Conductive polymers are being sought for battery development as well. Considerable weight savings over conventional cathode materials used in secondary storage batteries make portable devices easier to carry and electric cars more efficient and nimble. Secondary battery sales represent an $8 billion industry annually. The purpose of the project was to synthesize and characterize conductive polymers. TRACE Photonics Inc. has researched critical issues which affect conductivity. Much of their work has focused on production of substituted poly(phenylenevinylene) compounds. These compounds exhibit greater solubility over the parent polyphenylenevinylene, making them easier to process. Alkoxy substituted groups evaluated during this study included: methoxy, propoxy, and heptyloxy. Synthesis routes for production of alkoxy-substituted poly phenylenevinylene were developed. Considerable emphasis was placed on final product yield and purity.

Bohnert, G.W.

2002-11-22T23:59:59.000Z

145

Synthesis, calorimetric, structural and conductivity studies in a new thallium selenate tellurate adduct compound  

SciTech Connect

The crystal structure of the thallium selenate tellurate Tl{sub 2}SeO{sub 4}.Te(OH){sub 6} (TlSeTe) was determined by X-ray diffraction method. The title compound crystallizes in the monoclinic system with P2{sub 1}/c space group. The following parameters are: a = 12.358(3) A; b = 7.231(1) A; c = 11.986(2) A; {beta} = 111.092(2){sup o}; Z = 4. The structure can be regarded as being built of isolated TeO{sub 6} octahedra and SeO{sub 4} tetrahedra. The Tl{sup +} cations are intercalated between these kinds of polyhedra. The main feature of this structure is the coexistence of two different and independent anions (SeO{sub 4}{sup 2-} and TeO{sub 6}{sup 6-}) in the same unit cell. The structure is stable due to O-H...O hydrogen bonds which link tetrahedral and octahedral groups. Crystals of Tl{sub 2}SeO{sub 4}.Te(OH){sub 6} undergo three endothermal transitions at 373, 395 and 437 K. These transitions are detected by DSC and analyzed by dielectric measurements with impedance spectroscopy. The evolution of conductivity versus temperature showed the presence of a protonic conduction phase transition at 437 K. The phase transition at 373 K can be related to a structural phase transition, whereas the one at 395 K is ascribed as likely due to a ferroelectric-paraelectric phase transition.

Ktari, L. [Laboratoire de l'Etat Solide (LES), Faculte des Sciences de Sfax, 3000 Sfax (Tunisia); Abdelhedi, M. [Laboratoire de l'Etat Solide (LES), Faculte des Sciences de Sfax, 3000 Sfax (Tunisia); Laboratoire Leon Brouillon LLB, CEA Saclay, 91191 Gif-Sur-Yvette Cedex (France); Bouhlel, N. [Laboratoire de l'Etat Solide (LES), Faculte des Sciences de Sfax, 3000 Sfax (Tunisia); Dammak, M., E-mail: meddammak@yahoo.fr [Laboratoire de l'Etat Solide (LES), Faculte des Sciences de Sfax, 3000 Sfax (Tunisia); Cousson, A. [Laboratoire Leon Brouillon LLB, CEA Saclay, 91191 Gif-Sur-Yvette Cedex (France)

2009-08-05T23:59:59.000Z

146

Going the Distance? NRC's Response to the National Academy of Science's Transportation Study  

SciTech Connect

In February 2006, the National Academy of Sciences (NAS) published the results of a 3 1/2-year study, titled Going the Distance, that examined the safety of transporting spent nuclear fuel (SNF) and high level waste (HLW) in the United States. NAS initiated this study to address what it perceived to be a national need for an independent, objective, and authoritative analysis of SNF and HLW transport in the United States. The study was co-sponsored by the U.S. Nuclear Regulatory Commission (NRC), the U.S. Department of Energy (DOE), the U.S. Department of Transportation (DOT), the Electric Power Research Institute and the National Cooperative Highway Research Program. This paper addresses some of the recommendations made in the NAS study related to the performance of SNF transportation casks in long duration fires, the use of full-scale package testing, and the need for an independent review of transportation security prior to the commencement of large scale shipping campaigns to an interim storage site or geologic repository. In conclusion: The NRC believes that the current regulations in 10 CFR Part 71 for the design of SNF and HLW transportation packages provide a very high level of protection to the public for very severe accidents and credible threat scenarios. As recommended by the NAS study, additional studies of accidents involving severe fires have been completed. These studies have confirmed that spent fuel casks would be expected to withstand very severe fires without the release of any fission products from the spent fuel. Additionally, changes in rail operating procedures such as the use of dedicated trains and prohibition on the co-location of SNF and flammable liquids in rail tunnels can further reduce the already low probability of severe rail accident fires involving SNF and HLW. (authors)

Easton, E.P.; Bajwa, C.S. [United States Nuclear Regulatory Commission, Washington, DC (United States)

2008-07-01T23:59:59.000Z

147

The Transport and Deposition of Dioxin to Lake Michigan: A Case Study  

E-Print Network (OSTI)

The Transport and Deposition of Dioxin to Lake Michigan: A Case Study Dr. Mark Cohen NOAA Air and Deposition of Dioxin to Lake Michigan: A Case Study Presentation Outline ?? Policy Making Context Need to Know It? ?? Atmospheric Deposition of Dioxin to Lake Michigan ?? Uncertainty Analysis ??

148

Electron transport in disordered graphene  

Science Journals Connector (OSTI)

We study the electron transport properties of a monoatomic graphite layer (graphene) with different types of disorder. We show that the transport properties of the system depend strongly on the character of disorder. Away from half filling, the concentration dependence of conductivity is linear in the case of strong scatterers, in line with recent experimental observations, and logarithmic for weak scatterers. At half filling the conductivity is of the order of e2?h if the randomness preserves one of the chiral symmetries of the clean Hamiltonian, whereas for generic disorder the conductivity is strongly affected by localization effects.

P. M. Ostrovsky; I. V. Gornyi; A. D. Mirlin

2006-12-28T23:59:59.000Z

149

Guide to good practices for developing and conducting case studies: DOE handbook  

SciTech Connect

Learning from experience is often very costly to a facility in terms of injured personnel, damaged equipment, and wasted time. Learning from the experience gained at the facility and from industry can prevent repeating costly mistakes. This guide contains a method for learning from experience to prevent mistakes from occurring; that method is the case study. This guide describes how to develop and present case studies. This guide provides the instructional developer insight on the best kind of case study to use and includes examples of the various types of case studies.

NONE

1998-01-01T23:59:59.000Z

150

NMR and Transport Studies on Group IV Clathrates and Related Intermetallic Materials  

E-Print Network (OSTI)

thermoelectric materials are the intermetallic clathrates. Clathrates are cage-structured materials with guest atoms enclosed. Previous studies have shown lower thermal conductivities compared with many other bulk compounds, and it is believed that guest atom...

Zheng, Xiang

2012-10-19T23:59:59.000Z

151

Public Transportation is a Risk Factor for Active Tuberculosis in Lima, Peru.  

E-Print Network (OSTI)

??Public transportation is a potential source of community transmission of Mycobacterium tuberculosis (TB). We conducted an observational study in Lima, Peru to examine the association (more)

Furukawa, Nathan

2012-01-01T23:59:59.000Z

152

DOE-STD-1058-93; DOE Standard Guide to Good Practices For Developing and Conducting Case Studies  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

8-93 8-93 February 1993 DOE STANDARD GUIDE TO GOOD PRACTICES FOR DEVELOPING AND CONDUCTING CASE STUDIES U.S. Department of Energy FSC 6910 Washington, D.C. 20585 DISTRIBUTION STATEMENT A. Approved for public release; distribution is unlimited. This document has been reproduced directly from the best available copy. Available to DOE and DOE contractors from the Office of Scientific and Technical Information, P.O. Box 62, Oak Ridge, TN 37831. Available to the public from the National Technical Information Service, U.S. Department of Commerce, 5285 Port Royal Rd., VA 22161. Order No. DE93012982 DOE-STD-1058-93 iii FOREWORD The purpose of this Department of Energy (DOE) Guide to Good Practices for Developing and Conducting Case Studies is to provide Department of Energy contractor organizations

153

Lagrangian study of transport and mixing in a mesoscale eddy street  

E-Print Network (OSTI)

We use dynamical systems approach and Lagrangian tools to study surface transport and mixing of water masses in a selected coastal region of the Japan Sea with moving mesoscale eddies associated with the Primorskoye Current. Lagrangian trajectories are computed for a large number of particles in an interpolated velocity field generated by a numerical regional multi-layer eddy-resolving circulation model. We compute finite-time Lyapunov exponents for a comparatively long period of time by the method developed and plot the Lyapunov synoptic map quantifying surface transport and mixing in that region. This map uncovers the striking flow structures along the coast with a mesoscale eddy street and repelling material lines. We propose new Lagrangian diagnostic tools --- the time of exit of particles off a selected box, the number of changes of the sign of zonal and meridional velocities --- to study transport and mixing by a pair of strongly interacting eddies often visible at sea-surface temperature satellite imag...

Prants, S V; Ponomarev, V I; Uleysky, M Yu; 10.1016/j.ocemod.2011.02.008

2012-01-01T23:59:59.000Z

154

Study on Conducted Interference and Radiated Interference of Buck-Boost Converter in Electric Automobile  

Science Journals Connector (OSTI)

Buck-boost converter is an important component of electric automobile, it is an important interference source in electric automobile, the study of the interference source is ... of buck-boost converter is simplif...

Jian Wang; Youqun Zhao; Liguo Zang; Wei Wang

2013-01-01T23:59:59.000Z

155

An explorative case study on the effectiveness of using mobile device to conduct teacher professional development  

Science Journals Connector (OSTI)

In-service teacher professional development (PD) is the key element to prepare high-quality teachers. Previous studies suggested that in-service teachers' busy schedules make it difficult to find time to participate in training sessions, not ...

Shiang-Kwei Wang

2011-02-01T23:59:59.000Z

156

Director Position Center for Urban Transportation  

E-Print Network (OSTI)

Director Position Center for Urban Transportation The Center for Urban Transportation Research for state policymakers, transportation agencies, transportation professionals and the public. CUTR conducts of Transportation's Federal Transit Administration and Federal Highway Administration, the Florida Department

Arslan, Hüseyin

157

An optimal guarding scheme for thermal conductivity measurement using a guarded cut-bar technique, part 1 experimental study  

SciTech Connect

In the guarded cut-bar technique, a guard surrounding the measured sample and reference (meter) bars is temperature controlled to carefully regulate heat losses from the sample and reference bars. Guarding is typically carried out by matching the temperature profiles between the guard and the test stack of sample and meter bars. Problems arise in matching the profiles, especially when the thermal conductivitiesof the meter bars and of the sample differ, as is usually the case. In a previous numerical study, the applied guarding condition (guard temperature profile) was found to be an important factor in measurement accuracy. Different from the linear-matched or isothermal schemes recommended in literature, the optimal guarding condition is dependent on the system geometry and thermal conductivity ratio of sample to meter bar. To validate the numerical results, an experimental study was performed to investigate the resulting error under different guarding conditions using stainless steel 304 as both the sample and meter bars. The optimal guarding condition was further verified on a certified reference material, pyroceram 9606, and 99.95% pure iron whose thermal conductivities are much smaller and much larger, respectively, than that of the stainless steel meter bars. Additionally, measurements are performed using three different inert gases to show the effect of the insulation effective thermal conductivity on measurement error, revealing low conductivity, argon gas, gives the lowest error sensitivity when deviating from the optimal condition. The result of this study provides a general guideline for the specific measurement method and for methods requiring optimal guarding or insulation.

Changhu Xing [Utah State Univ., Logan, UT (United States). Dept. of Mechanical and Aerospace Engineering; Colby Jensen [Utah State Univ., Logan, UT (United States). Dept. of Mechanical and Aerospace Engineering; Charles Folsom [Utah State Univ., Logan, UT (United States). Dept. of Mechanical and Aerospace Engineering; Heng Ban [Utah State Univ., Logan, UT (United States). Dept. of Mechanical and Aerospace Engineering; Douglas W. Marshall [Idaho National Laboratory (INL), Idaho Falls, ID (United States)

2014-01-01T23:59:59.000Z

158

Transport phenomena in metal-halide lamps a poly-diagnostic study  

E-Print Network (OSTI)

/ spectroscopie. Subject headings: gas discharges / metal-halide lamps / plasma diagnostics / plasma properties-halide arc lamps . . . . . . . . . . . 7 1.3 Scope of ThesisTransport phenomena in metal-halide lamps a poly-diagnostic study Tanya Nimalasuriya #12;Copyright

Eindhoven, Technische Universiteit

159

Preliminary 3-D site-scale studies of radioactive colloid transport in the unsaturated zone at  

E-Print Network (OSTI)

at Yucca Mountain, Nevada G.J. Moridis *, Q. Hu, Y.-S. Wu, G.S. Bodvarsson Earth Sciences Division in a repository to be situated in the unsaturated zone (UZ) at Yucca Mountain (YM), Nevada. In this study we of the spatial distribution of hydraulic and transport properties in the Yucca Mountain subsurface are considered

Hu, Qinhong "Max"

160

LCA AND THE X-DEVELOPMENT METHOD, THE CASE STUDY OF A TRANSPORT BOX  

E-Print Network (OSTI)

Page 1 LCA AND THE X-DEVELOPMENT METHOD, THE CASE STUDY OF A TRANSPORT BOX Jean Vareille (1), Mehdi consequence is the reduction of the iterations during the design, especially in a LCA. Keywords design, the thickness, the ribs, etc. hal-00763821,version1-11Dec2012 Author manuscript, published in "LCA Conference

Paris-Sud XI, Université de

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Compact cryogenic Kerr microscope for time-resolved studies of electron spin transport in microstructures  

E-Print Network (OSTI)

Compact cryogenic Kerr microscope for time-resolved studies of electron spin transport A compact cryogenic Kerr microscope for operation in the small volume of high-field magnets is described-temperature optical microscope, elec- tromagnet and cryogenic cell with cold finger to measure continuous-wave cw

van der Wal, Caspar H.

162

Monte Carlo Study of the Spin Transport in Magnetic Materials , K. Akablia,b  

E-Print Network (OSTI)

Monte Carlo Study of the Spin Transport in Magnetic Materials Y. Magnina , K. Akablia,b , H. T of Natural Science and Technology, Okayama University 3-1-1 Tsushima-naka, Kita-ku, Okayama 700-8530, Japan.. Abstract The resistivity in magnetic materials has been theoretically shown to depend on the spin

163

The Transport and Deposition of Dioxin to Lake Michigan: A Case Study  

E-Print Network (OSTI)

are the consequences of this exposure? An analysis and discussion of the effects of dioxin contamination in LakeThe Transport and Deposition of Dioxin to Lake Michigan: A Case Study Mark Cohen NOAA Air Resources, data on the atmospheric deposition of dioxin to Lake Michigan are presented and discussed. Included

164

Fabrication of nanogapped single-electron transistors for transport studies of individual single-molecule magnets  

E-Print Network (OSTI)

Fabrication of nanogapped single-electron transistors for transport studies of individual single-molecule through individual single-molecule magnets SMMs . The devices were patterned via multiple layers molecules have received considerable attention over the last several years due to the introduction of single

del Barco, Enrique

165

Electrohydrodynamic induction and conduction pumping of dielectric liquid film: theoretical and numerical studies  

E-Print Network (OSTI)

that can cause motion and deformation in the medium. Depending on the media of interest, two distinct fields of study have emerged from the models of a fluid flow under the influence of electromagnetic field; magnetohydrodynamics (MHD...) and electrohydrodynamics (EHD). The MHD deals with the flow field under the influence of magnetic field with no charged particles and no influence from the electric fields. On the other hand, the EHD deals with flow field under the influence of an electric field...

Al Dini, Salem A. S.

2007-04-25T23:59:59.000Z

166

An empirical study of direct rebound effect for road freight transport in China  

Science Journals Connector (OSTI)

Abstract Improving energy efficiency has been considered as a major approach to reduce transportation fuel consumption, whereas its effectiveness that reduced transportation cost may lead to incremental energy use-i.e., a direct rebound effect. This paper provides a critical review of direct rebound effect literature, adopts a double logarithmic regression equation and a error correction model respectively to measure the magnitude of long-term and short-term direct rebound effects by 31 provincial panel data of China from 1999 to 2011. The empirical study shows that: in aspect of long term, a partial rebound effect exist in Chinese road freight transportation department, and its magnitude of entire nation, eastern, central and western regions are 84%, 52%, 80% and 78%. A majority of the expected energy reduction from efficiency improvement could be offset due to the existence of rebound effect; independent policy of improving energy efficiency is not as effective as people expected. In aspect of short term, a tiny super conservation effect exists in Chinese road freight transportation department. Further investigation indicated that direct rebound effect for road freight transportation tends to decline as growth rate of urbanization decrease.

Zhaohua Wang; Milin Lu

2014-01-01T23:59:59.000Z

167

Theoretical study of intraband optical transitions in conduction band of dot-in-a-well system  

SciTech Connect

We study numerically absorption optical spectra of n-doped InAs/In{sub 015}Ga{sub 085}As/GaAs quantum dot-in-a-well systems. The absorption spectra are mainly determined by the size of a quantum dot and have weak dependence on the thickness of quantum well and position of the dot in a well. The dot-in-a-well system is sensitive to both in-plane and out-of-plane polarizations of the incident light with much stronger absorption intensities for the in-plane-polarized light. The absorption spectrum of in-plane-polarized light has also a multi-peak structure with two or three peaks of comparable intensities, while the absorption spectrum of out-of-plane polarized light has a single well-pronounced peak.

Chaganti, Venkata R.; Apalkov, Vadym [Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30302 USA. (Georgia)] [Department of Physics and Astronomy, Georgia State University, Atlanta, Georgia 30302 USA. (Georgia)

2014-02-15T23:59:59.000Z

168

How Does Folding Modulate Thermal Conductivity of Graphene? Nuo Yang1,2  

E-Print Network (OSTI)

of thermal conductivity is due to scattering of low frequency phonons by the folds. Our results suggest dimensional materials. Keywords Folded graphene ribbon, thermal conductivity, phonon transport, scattering #12 conductivity of low-dimensional silicon and carbon materials11 and graphene ribbons12 were studied by EMD

Li, Baowen

169

Hanford site: A guide to record series supporting epidemiologic studies conducted for the Department of Energy  

SciTech Connect

The primary purpose of this guide is to describe each series of records which pertains to studies of worker health and mortality funded by the U.S. Department of Energy (DOE) at the Hanford site. Additionally, the guide provides information on the location and classification of the records and how they may be accessed. History Associates Incorporated (HAI) prepared this guide as part of its work as the support services contractor for DOE`s Epidemiologic Records Inventory Project. This introduction briefly describes the Epidemiologic Records Inventory Project, HAI`s role in the project, the history of the DOE and the Hanford site, and Hanford`s organizational structure. It provides information on the methodology used to inventory and describe pertinent records stored in various onsite offices, in Hanford`s Records Holding Area (RHA), and at the Seattle Federal Records Center (SFRC). Other topics include the methodology used to produce the guide, the arrangement of the record Series descrimations, and information on accessing records repositories.

NONE

1995-07-06T23:59:59.000Z

170

Lagrangian study of transport and mixing in a mesoscale eddy street  

E-Print Network (OSTI)

We use dynamical systems approach and Lagrangian tools to study surface transport and mixing of water masses in a selected coastal region of the Japan Sea with moving mesoscale eddies associated with the Primorskoye Current. Lagrangian trajectories are computed for a large number of particles in an interpolated velocity field generated by a numerical regional multi-layer eddy-resolving circulation model. We compute finite-time Lyapunov exponents for a comparatively long period of time by the method developed and plot the Lyapunov synoptic map quantifying surface transport and mixing in that region. This map uncovers the striking flow structures along the coast with a mesoscale eddy street and repelling material lines. We propose new Lagrangian diagnostic tools --- the time of exit of particles off a selected box, the number of changes of the sign of zonal and meridional velocities --- to study transport and mixing by a pair of strongly interacting eddies often visible at sea-surface temperature satellite images in that region. We develop a technique to track evolution of clusters of particles, streaklines and material lines. The Lagrangian tools used allow us to reveal mesoscale eddies and their structure, to track different phases of the coastal flow, to find inhomogeneous character of transport and mixing on mesoscales and submesoscales and to quantify mixing by the values of exit times and the number of times particles wind around the eddy's center.

S. V. Prants; M. V. Budyansky; V. I. Ponomarev; M. Yu. Uleysky

2012-02-02T23:59:59.000Z

171

Geographic Information Systems-Transportation ISTEA management systems server-net prototype pooled fund study: Phase B summary  

SciTech Connect

The Geographic Information System-Transportation (GIS-T) ISTEA Management Systems Server Net Prototype Pooled Fund Study represents the first national cooperative effort in the transportation industry to address the management and monitoring systems as well as the statewide and metropolitan transportation planning requirements of the Intermodal Surface Transportation Efficiency Act of 1991 (ISTEA). The Study was initiated in November 1993 through the Alliance for Transportation Research and under the leadership of the New Mexico State Highway and Transportation Department. Sandia National Laboratories, an Alliance partner, and Geographic Paradigm Computing. Inc. provided technical leadership for the project. In 1992, the Alliance for Transportation Research, the New Mexico State Highway and Transportation Department, Sandia National Laboratories, and Geographic Paradigm Computing, Inc., proposed a comprehensive research agenda for GIS-T. That program outlined a national effort to synthesize new transportation policy initiatives (e.g., management systems and Intelligent Transportation Systems) with the GIS-T server net ideas contained in the NCHRP project {open_quotes}Adaptation of GIS to Transportation{close_quotes}. After much consultation with state, federal, and private interests, a project proposal based on this agenda was prepared and resulted in this Study. The general objective of the Study was to develop GIS-T server net prototypes supporting the ISTEA requirements for transportation planning and management and monitoring systems. This objective can be further qualified to: (1) Create integrated information system architectures and design requirements encompassing transportation planning activities and data. (2) Encourage the development of functional GIS-T server net prototypes. (3) Demonstrate multiple information systems implemented in a server net environment.

Espinoza, J. Jr.; Dean, C.D.; Armstrong, H.M. [and others

1997-06-01T23:59:59.000Z

172

The impact of railroad mergers on grain transportation markets: a Kansas case study  

Science Journals Connector (OSTI)

While there have been many studies of the impact of railroad deregulation on agricultural transportation markets there have been very few that address the impact of railroad mergers on rail grain prices and the distribution of efficiency gains. The purpose of this paper is to add to the sparse literature regarding the effect of railroad mergers on agricultural transportation markets. Given the ever declining number of Class I railroads, this research is very timely. The specific objectives of the research are as follows: (1) Analyze the impact of the Burlington Northern (BN)Santa Fe (SF) merger on the ability of the BNSF to increase prices on movements of Kansas wheat to Houston, Texas. (2) Analyze the impact of the Union Pacific (UP)Southern Pacific (SP) merger on the ability of the UPSP to increase prices on movements of Kansas wheat to Houston, Texas. (3) Analyze changes in Kansas wheat logistics system costs as a result of the BNSF and UPSP mergers. Two models are developed to achieve the objectives of the study. A network model of the wheat logistics system is used to identify the least cost transportation routes from the Kansas study area to the market at Houston, Texas. A profit improvement algorithm is developed to measure the amount by which railroads can raise their prices above variable cost. The BNSF and UPSP achieve only minor increases in market power (measured by the ratio of revenue to variable cost) because the merged railroads have only slight advantages in cost relative to other railroads that serve the same areas as the merged railroads. Wheat shippers benefit from merger-induced reductions in transportation and handling costs. Shippers are likely to capture a significant share of these cost reductions since intrarailroad competition is present after the mergers. Transport cost reductions accompany mergers due to more direct routing of wheat shipments and the assumption that the merged railroad operates at the costs of the lower cost partner.

Joon Je Park; Michael W. Babcock; Kenneth Lemke

1999-01-01T23:59:59.000Z

173

High-Frequency Conductivity of a Plasma in Quasi-Equilibrium. III. Study of a Two-Temperature Plasma  

Science Journals Connector (OSTI)

A general expression for the high-frequency conductivity of a homogeneous, isotropic plasma is obtained. The derivation is based on the use of the Bogoliubov-Born-Green-Kirkwood-Yvon hierarchy and therefore includes all effects due to the high-frequency field and the collective interactions up to first order in the plasma parameter. As an application of the general result, a two-temperature plasma with the electron temperature exceeding the ion temperature is studied in detail. It is found that when the ratio of the electron temperature to the ion temperature exceeds 100, there is an enhancement in the resistivity resulting from the excitation of incoherent ion waves.

E. H. Klevans and C. -S. Wu

1966-09-09T23:59:59.000Z

174

MDT Ageing Studies Results of the measurements conducted at the Gamma Irradiation Facility GIF between autumn 2001 and summer 2003  

E-Print Network (OSTI)

This note summarizes the results of MDT ageing studies conducted at the CERN Gamma Irradiation Facility GIF between autumn 2001 and summer 2003, using for the first time a series-production MDT chamber (of type BIS) and a prototype of the gas recirculation system to be installed at Atlas. The main outcome of the measurements was a very high sensitivity towards any silicone contamination of the Atlas MDTs when operated in a high rate environment. The ageing effects observed were traced to several contaminated parts in the off-chamber gas system, proving the paramount importance of an effective quality control during the gas system assembly and component selection process.

Zimmermann, S

2004-01-01T23:59:59.000Z

175

The Experimental Study on the Wax-Deposit Law in High-Pour-Point Crude Oi1 Transportation  

Science Journals Connector (OSTI)

High pour point properties of crude oil are generally due to the high wax content, so the study of the laws and the characteristics of wax deposition are significant for taking steps to save energy and transport safely. For the wax deposition of high ... Keywords: pipeline transportation, high-pour-point waxy crude, wax deposition law, DSC, experimental study

Wang Zhihua; Si Minglin; Wang Jinxiu; Li Jungang

2009-10-01T23:59:59.000Z

176

Chiral Conductivities of Nanotubes  

Science Journals Connector (OSTI)

Chiral conductivities of nanotubes are examined within the framework of the Boltzmann transport equation. Electron transport along a chiral trajectory is decomposed into current components along the tubule axis and its circumference. Within a constant relaxation time approximation, these components are derived from the expectation values of Fermi velocities by using the appropriate operators and the wave functions at the Fermi level obtained by first-principles calculations. As a typical example, the chiral current of a doped BC2N tubule is illustrated, and the strength of the induced magnetic field is discussed.

Yoshiyuki Miyamoto; Steven G. Louie; Marvin L. Cohen

1996-03-18T23:59:59.000Z

177

Intelligent Transportation Systems - Center for Transportation Analysis  

NLE Websites -- All DOE Office Websites (Extended Search)

Intelligent Transportation Systems Intelligent Transportation Systems The Center for Transportation Analysis does specialty research and development in intelligent transportation systems. Intelligent Transportation Systems (ITS) are part of the national strategy for improving the operational safety, efficiency, and security of our nation's highways. Since the early 1990s, ITS has been the umbrella under which significant efforts have been conducted in research, development, testing, deployment and integration of advanced technologies to improve the measures of effectiveness of our national highway network. These measures include level of congestion, the number of accidents and fatalities, delay, throughput, access to transportation, and fuel efficiency. A transportation future that includes ITS will involve a significant improvement in these

178

An apparatus for the study of superconductivity and electron transport properties of amorphous metals  

E-Print Network (OSTI)

Properties of Amorphous Metals. (August 1987) Hwa Sun Stalnaker, B. S. , Sam Houston State University Chairman of Advisory Conunittee: Dr. Donald G. Naugle An apparatus for studying superconductivity and electron transport prop- erties such as electrical... and electr?deposition usually yield thin films, and the liquid quenching method yields thicker foils. Solid state reaction has been used to pri&duce thin films, powders and fi&ils, but is restricteil t? only a few alloys. The production of amorphous metals...

Stalnaker, Hwa Sun

2012-06-07T23:59:59.000Z

179

Sustainability impact assessment of transportation policies A case study for Bangalore city  

Science Journals Connector (OSTI)

Abstract The first part of the current study proposes a model for assessing the impact of various transportation policies and projects based on the variation in three pillars of sustainability environmental, economic and social. The methodology consists of determination of different indicators of sustainability pillars and thus the Composite Sustainability Index (CSI) before and after introduction of a transportation policy. Indicators include air pollution indicators, natural resource consumption indicators, health indicators, accessibility indicators, mobility indicators, commute indicators, and cost indicators. CSI is obtained by summing all these indicators after weighing them using an Analytical Hierarchy Process (AHP). The indicator value under a transportation policy scenario is obtained using the mode shift found using a mode choice model incorporated with the policy variable. The second part consists of a case study for the city of Bangalore where the sustainability impact due to introduction of congestion pricing in the CBD, during peak hour, is tested. A choice model developed from Revealed Preference data (RP) is used in the study. The choice model estimated a reduction of 14.11% and 2.4% respectively in the total trip distance travelled by car and bike trips after introduction of congestion charging. There was also an increase of 1.7% in CSI because of congestion pricing.

Ashish Verma; T.M. Rahul; Malvika Dixit

2014-01-01T23:59:59.000Z

180

Frequency dependent magnetoconductivity and conductivity study in Ni-dispersed silica nano-composite produced by sol-gel technique  

Science Journals Connector (OSTI)

The low frequency (20 Hz to 1 MHz) ac conductivity and magnetoconductivity behaviour of ceramic nanocomposite (Ni-SiO2) at low temperature down to 77 K are reported. The frequency dependent conductivity followed ...

A. Sarkar; P. Ghosh; S. K. Chattopadhyay; A. K. Meikap

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

STUDY OF TRANSPORTATION OF GTL PRODUCTS FROM ALASKAN NORTH SLOPE (ANS) TO MARKETS  

SciTech Connect

The Alaskan North Slope is one of the largest hydrocarbon reserves in the US where Gas-to-Liquids (GTL) technology can be successfully implemented. The proven and recoverable reserves of conventional natural gas in the developed and undeveloped fields in the Alaskan North Slope (ANS) are estimated to be 38 trillion standard cubic feet (TCF) and estimates of additional undiscovered gas reserves in the Arctic field range from 64 TCF to 142 TCF. Transportation of the natural gas from the remote ANS is the key issue in effective utilization of this valuable and abundance resource. The throughput of oil through the Trans Alaska Pipeline System (TAPS) has been on decline and is expected to continue to decline in future. It is projected that by the year 2015, ANS crude oil production will decline to such a level that there will be a critical need for pumping additional liquid from GTL process to provide an adequate volume for economic operation of TAPS. The pumping of GTL products through TAPS will significantly increase its economic life. Transporting GTL products from the North Slope of Alaska down to the Marine terminal at Valdez is no doubt the great challenge facing the Gas to Liquids options of utilizing the abundant natural gas resource of the North Slope. The primary purpose of this study was to evaluate and assess the economic feasibility of transporting GTL products through the TAPS. Material testing program for GTL and GTL/Crude oil blends was designed and implemented for measurement of physical properties of GTL products. The measurement and evaluation of the properties of these materials were necessary so as to access the feasibility of transporting such materials through TAPS under cold arctic conditions. Results of the tests indicated a trend of increasing yield strength with increasing wax content. GTL samples exhibited high gel strengths at temperatures as high as 20 F, which makes it difficult for cold restart following winter shutdowns. Simplified analytical models were developed to study the flow of GTL and GTL/crude oil blends through TAPS in both commingled and batch flow models. The economics of GTL transportations by either commingled or batching mode were evaluated. The choice of mode of transportation of GTL products through TAPS would depend on the expected purity of the product and a trade-off between loss in product value due to contamination and cost of keeping the product pure at the discharge terminal.

Godwin A. Chukwu, Ph.D., P.E.

2002-09-01T23:59:59.000Z

182

Audio Cards for High-Resolution and Economical Electronic Transport Studies  

E-Print Network (OSTI)

We report on a technique for determining electronic transport properties using commercially available audio cards. Using a typical 24-bit audio card simultaneously as a sine wave generator and a narrow bandwidth ac voltmeter, we show the spectral purity of the analog-to-digital and digital-to-analog conversion stages, including an effective number of bits greater than 16 and dynamic range better than 110 dB. We present two circuits for transport studies using audio cards: a basic circuit using the analog input to sense the voltage generated across a device due to the signal generated simultaneously by the analog output; and a digitally-compensated bridge to compensate for nonlinear behavior of low impedance devices. The basic circuit also functions as a high performance digital lock-in amplifier. We demonstrate the application of an audio card for studying the transport properties of spin-valve nanopillars, a two-terminal device that exhibits Giant Magnetoresistance (GMR) and whose nominal impedance can be sw...

Gopman, Daniel B; Kent, Andrew D

2012-01-01T23:59:59.000Z

183

Environmental Transport Division: 1979 report  

SciTech Connect

During 1979, the Environmental Transport Division (ETD) of the Savannah River Laboratory conducted atmospheric, terrestrial, aquatic, and marine studies, which are described in a series of articles. Separate abstracts were prepared for each. Publications written about the 1979 research are listed at the end of the report.

Murphy, C.E. Jr.; Schubert, J.F.; Bowman, W.W.; Adams, S.E.

1980-03-01T23:59:59.000Z

184

A Discussion of Conductivity Testing in High Temperature Membranes...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

A Discussion of Conductivity Testing in High Temperature Membranes (lessons learned in assessing transport) A Discussion of Conductivity Testing in High Temperature Membranes...

185

Features of conduction mechanisms in Si/oligo-{beta}-naphthol/metal heterostructures  

SciTech Connect

Conduction mechanisms in Si-polymer-metal heterostructures with oligo-{beta}-naphthol as a wide band-gap polymer have been studied. The results obtained are explained within the models of hopping transport via trap levels, Schottky emission, and field tunneling emission. Different charge transport mechanisms operate in different temperature ranges and under different electric fields.

Hasannli, Sh. M., E-mail: Hasanli_sh@rambler.ru; Mursakulov, N. N.; Samedova, U. F.; Abdulzade, N. N.; Mamedov, B. A. [National Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan); Guseynov, R. K. [Ganja State University (Azerbaijan)

2010-07-15T23:59:59.000Z

186

Los Alamos National Laboratory: A guide to records series supporting epidemiologic studies conducted for the Department of Energy  

SciTech Connect

The purpose of this guide is to describe each series of records that pertains to the epidemiologic studies conducted by the Epidemiology Section of the Occupational Medicine Group (ESH-2) at the Department of Energy`s (DOE) Los Alamos National Laboratory (LANL) in Los Alamos, New Mexico. The records described in this guide relate to occupational studies performed by the Epidemiology Section, including those pertaining to workers at LANL, Mound Plant, Oak Ridge Reservation, Pantex Plant, Rocky Flats Plant, and Savannah River Site. Also included are descriptions of other health-related records generated or collected by the Epidemiology Section and a small set of records collected by the Industrial Hygiene and Safety Group. This guide is not designed to describe the universe of records generated by LANL which may be used for epidemiologic studies of the LANL work force. History Associates Incorporated (HAI) prepared this guide as part of its work as the support services contractor for DOE`s Epidemiologic Records Inventory Project. This introduction briefly describes the Epidemiologic Records Inventory Project, HAI`s role in the project, the history of LANL the history and functions of LANL`s Health Division and Epidemiology Section, and the various epidemiologic studies performed by the Epidemiology Section. It provides information on the methodology that HAI used to inventory and describe records housed in the offices of the LANL Epidemiology Section in Technical Area 59 and at the LANL Records Center. Other topics include the methodology used to produce the guide, the arrangement of the detailed record series descriptions, and information concerning access to records repositories.

NONE

1997-01-01T23:59:59.000Z

187

Multimedia transport and risk assessment of organophosphate pesticides and a case study in the northern San Joaquin Valley of California  

E-Print Network (OSTI)

Multimedia transport and risk assessment of organophosphate pesticides and a case study) pesticides in the northern San Joaquin Valley of California. Chemical concentrations in environmental media guidelines for cumulative risk analysis. Uncertainty in the human exposure parame- ters was included

Zhang, Minghua

188

Turbulence and transport studies with phase contrast imaging in the Alcator C-Mod tokamak and comparisons with gyrokinetic simulations  

E-Print Network (OSTI)

An upgraded phase contrast imaging (PCI) diagnostic is used to study turbulence and transport in Alcator C-Mod. The upgraded PCI system is capable of measuring density fluctuations with high temporal (2 kHz-5 MHz) and ...

Lin, Liang, Ph. D. Massachusetts Institute of Technology

2009-01-01T23:59:59.000Z

189

Development of a particle injection system for impurity transport study in KSTAR  

SciTech Connect

A solid particle injection system is developed for KSTAR. The system has a compact size, compatibility with a strong magnetic field and high vacuum environment, and the capability to inject a small amount of solid particles with a narrow injection angle. The target flight-distance of 10 cm has been achieved with a particle loss rate of less than 10%. Solid impurity particles such as tungsten and carbon will be injected by this system at the midplane in KSTAR. The impurity transport feature will be studied with a soft X-ray array, a vacuum ultra-violet diagnostic, and Stand Alone Non-Corona code.

Lee, H. Y.; Hong, Joohwan; Lee, Seung Hun; Jang, Siwon; Jang, Juhyeok; Jeon, Taemin; Park, Jae Sun; Choe, Wonho, E-mail: wchoe@kaist.ac.kr [Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Republic of Korea and Fusion Plasma Transport Research Center, Daejeon 305-701 (Korea, Republic of); Hong, Suk-Ho [National Fusion Research Institute, Daejeon 305-806 (Korea, Republic of)

2014-11-15T23:59:59.000Z

190

A study of transportation factors affecting the suitability of Houston, Texas, as a wool scouring plant site  

E-Print Network (OSTI)

A STUDY OF TRANSPORTATION FACTORS AFFECTING THE SUITABILITY OF HOUSTON, TEXAS AS A WOOL SCOURING PLANT SITE A Thesis By Hoy A. Richards Submitted to the Graduate School of the Agricultural and Mechanical College of Texas in partial... fulfillment of the requirements for the degree MASTER OF SCIENCE May 1961 Ma)or Sub)ect Economi. cs A STUDY OF TRANSPORTATION FACTORS AFFECTING THE SUITABILITY OF HOUSTON, TEXAS AS A WOOL SCOURING PLANT SITE A Thesis By Hoy A. Richards Approved...

Richards, Hoy Andrew

2012-06-07T23:59:59.000Z

191

Improving chemical vapor deposition graphene conductivity using molybdenum trioxide: An in-situ field effect transistor study  

SciTech Connect

By using in situ field effect transistor characterization integrated with molecular beam epitaxy technique, we demonstrate the strong surface transfer p-type doping effect of single layer chemical vapor deposition (CVD) graphene, through the surface functionalization of molybdenum trioxide (MoO{sub 3}) layer. After doping, both the hole and electron mobility of CVD graphene are nearly retained, resulting in significant enhancement of graphene conductivity. With coating of 10 nm MoO{sub 3}, the conductivity of CVD graphene can be increased by about 7 times, showing promising application for graphene based electronics and transparent, conducting, and flexible electrodes.

Han, Cheng [Department of Physics and Institute for Advanced Study, Nanchang University, 999 Xue Fu Da Dao, Nanchang (China) [Department of Physics and Institute for Advanced Study, Nanchang University, 999 Xue Fu Da Dao, Nanchang (China); Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore); Lin, Jiadan; Xiang, Du [Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore)] [Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore); Wang, Chaocheng; Wang, Li [Department of Physics and Institute for Advanced Study, Nanchang University, 999 Xue Fu Da Dao, Nanchang (China)] [Department of Physics and Institute for Advanced Study, Nanchang University, 999 Xue Fu Da Dao, Nanchang (China); Chen, Wei [Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore) [Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore); Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543 and Graphene Research Centre, National University of Singapore, 2 Science Drive 3, Singapore 117542 (Singapore)

2013-12-23T23:59:59.000Z

192

Membrane vesicles: A simplified system for studying auxin transport. Final technical report  

SciTech Connect

Indoleacetic acid (IAA), the auxin responsible for regulation of growth, is transported polarly in plants. Several different models have been suggested to account for IAA transport by cells and its accumulation by membrane vesicles. One model sees diffusion of IAA driven by a pH gradient. The anion of a lipophilic weak acid like IAA or butyrate accumulates in an alkaline compartment in accord with the size of the pH gradient The accumulation of IAA may be diminished by the permeability of its lipophilic anion. This anion leak may be blocked by NPA. With anion efflux blocked, a gradient of two pH units would support an IAA accumulation of less than 50-fold at equilibrium (2) Another model sees diffusion of IAA in parallel with a saturable symport (IAA{sup {minus}} + nH{sup +}), driven by both the pH gradient and membrane voltage. Such a symport should be highly accumulative, however, with a lipophilic weak acid such as IAA, net diffusive efflux of IAAH whenever IAAHI{sub i} > IAAH{sub o} would constitute a leak. (3) A third model sees a pH change driven IAA uptake and saturable symport enhanced by internal binding sites. Following pH gradient-driven accumulation of IAA, the anion may bind to an intravesicular site, permitting further uptake of IAA. NPA, by blocking anion efflux, enhances this binding. We have reported that membrane vesicles isolated from actively growing plant tissues are a good system for studying the mechanisms involved in the transport and accumulation of auxin.

Goldsmith, M.H.M.

1989-12-31T23:59:59.000Z

193

Assessing Reliability in Transportation Energy Supply Pathways: A Hydrogen Case Study  

E-Print Network (OSTI)

and 2) on-site electrolysis of water using electricitypoints of end use via electrolysis of water, so no transport

McCarthy, Ryan W.; Ogden, J

2005-01-01T23:59:59.000Z

194

Transport-and diffusion-based optical tomography in small domains: a comparative study  

E-Print Network (OSTI)

reconstructions based on the radiative transport and diffusion equations in optical tomography for media of small that the propaga- tion of near-infrared light in tissues is best modeled by the radiative transport equation (RTE the transport equation by its diffusion approximation, which models the spa- tial density of photons

Bal, Guillaume

195

Quantum conductance of zigzag graphene oxide nanoribbons  

SciTech Connect

The electronic properties of zigzag graphene oxide nanoribbons (ZGOR) are presented. The results show interesting behaviors which are considerably different from the properties of the perfect graphene nanoribbons (GNRs). The theoretical methods include a Huckel-tight binding approach, a Green's function methodology, and the Landauer formalism. The presence of oxygen on the edge results in band bending, a noticeable change in density of states and thus the conductance. Consequently, the occupation in the valence bands increase for the next neighboring carbon atom in the unit cell. Conductance drops in both the conduction and valence band regions are due to the reduction of allowed k modes resulting from band bending. The asymmetry of the energy band structure of the ZGOR is due to the energy differences of the atoms. The inclusion of a foreign atom's orbital energies changes the dispersion relation of the eigenvalues in energy space. These novel characteristics are important and valuable in the study of quantum transport of GNRs.

Kan, Zhe; Nelson, Christopher; Khatun, Mahfuza, E-mail: mkhatun@bsu.edu [Department of Physics and Astronomy, Center for Computational Nanoscience, Ball State University, Muncie, Indiana 47306 (United States)

2014-04-21T23:59:59.000Z

196

Description of three ecology studies on brown shrimp Penaeus aztecus and white shrimp P. setiferus conducted by the National Marine Fisheries Service, Galveston, Texas  

E-Print Network (OSTI)

Description of three ecology studies on brown shrimp Penaeus aztecus and white shrimp'P; setiferus conducted by the Mational Marine Fisheries Service, Galveston, Texas. A professional paper by Maria Eugenia de Diego Submitted to the College... shrimp Penaeus aztecus and white shrimp P, set1ferus conducted by the Nat1onal Marine F1sheries Ser- v1ce, Galveston, Texas. (December, 19843 Maria Eugenia de Diego, B. S. , Universidad de Panama Chairman of Adv1sory Committee: Dr. Addison L...

Diego, Maria Eugenia de

1984-01-01T23:59:59.000Z

197

Low Temperature Proton Conductivity  

NLE Websites -- All DOE Office Websites (Extended Search)

and and MEAs at Freezing Temperatures Thomas A. Zawodzinski, Jr. Case Western Reserve University Cleveland, Ohio 2 Freezing Fuel Cells: Impact on MEAS Below 0 o C *Transport processes/motions slow down: questions re: lower conductivity,water mobility etc *Residual water will have various physical effects in different portions of the MEA questions re: durability of components 3 3 'States' of Water in Proton Conductors ? Freezing (bulk), bound freezable, bound non freezable water states claimed based on DSC * Freezing water more mobile, allegedly important for high conductivity Analysis common for porous systems Does the presence of these states matter? Why? 4 'State of Water' in PEMs At T < 0 o C *'Liquid-like' water freezes *'Non-freezing' fraction: water of solvation at pore

198

Experimental and numerical modeling of convective proppant transport  

SciTech Connect

Slurry-transport and -settling experiments were conducted to improve current descriptions of proppant transport, and the results were used to formulate a new slurry-transport model incorporated into a fully 3D fracture simulator. The model was tested and verified vs. experimental observations of slurry transport in a 4 x 16-ft slot model. Results of the study indicate that proppant-slurry transport can be modeled accurately by accounting for the effects of single-particle settling, density-driven flow, particle-velocity profiles, and slurry rheology.

Barree, R.D. [Marathon Oil Co., Littleton, CO (United States); Conway, M.W. [Stim-Lab Inc., Duncan, OK (United States)

1995-03-01T23:59:59.000Z

199

Photoacoustic investigation of transport in semiconductors: Theoretical and experimental study of a Ge single crystal  

Science Journals Connector (OSTI)

Photoacoustic (PA) heat-transmission measurements were used to study transport in a nearly intrinsic Ge single crystal. A theoretical model was developed which quantitatively describes excess carrier and thermal-wave space distributions, within the semiconductor under monochromatic cw modulated excitation. The PA heat-transmission, reflection, and photothermal-beam-deflection signals can be calculated using this model. It is shown that the frequency characteristic of the measurement system can be eliminated using measurements on different thicknesses of the same sample. It is also shown that both the normalized phase and amplitude spectra, as a function of the modulation frequency, can be used to determine the values of the thermal diffusivity, the excess-carrier lifetime, and the surface recombination velocity.

M. D. Drami?anin; P. M. Nikoli?; Z. D. Ristovski; D. G. Vasiljevi?; D. M. Todorovi?

1995-05-15T23:59:59.000Z

200

Transportation risk assessment for ethanol transport  

E-Print Network (OSTI)

(California, Texas Gulf Coast, New England Atlantic Coast) will be of particular interest. The goal is to conduct a quantitative risk assessment on the pipeline, truck, and rail transportation modes to these areas. As a result of the quantitative risk...

Shelton Davis, Anecia Delaine

2009-05-15T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


201

Morphodynamics Suriname River: study of mud transport and impact due to lowering the fairway channel:.  

E-Print Network (OSTI)

??inland transportation of goods. The artificial fairway channel provides entrance to the port of Paramaribo and Paranam. The motivation for this thesis project is the (more)

Loose, M.

2008-01-01T23:59:59.000Z

202

Metropolitan Transport Planning Collaboration in Decentralized Indonesia. Case Study of Greater Yogyakarta.  

E-Print Network (OSTI)

??Indonesia has witnessed the emergence of metropolitan areas whose boundaries stretch beyond administratively defined local authorities. This prompts the need of integrated metropolitan transport planning (more)

Diwangkari, Andyan

2014-01-01T23:59:59.000Z

203

Electrical Transport Experiments at High Pressure  

SciTech Connect

High-pressure electrical measurements have a long history of use in the study of materials under ultra-high pressures. In recent years, electrical transport experiments have played a key role in the study of many interesting high pressure phenomena including pressure-induced superconductivity, insulator-to-metal transitions, and quantum critical behavior. High-pressure electrical transport experiments also play an important function in geophysics and the study of the Earth's interior. Besides electrical conductivity measurements, electrical transport experiments also encompass techniques for the study of the optoelectronic and thermoelectric properties of materials under high pressures. In addition, electrical transport techniques, i.e., the ability to extend electrically conductive wires from outside instrumentation into the high pressure sample chamber have been utilized to perform other types of experiments as well, such as high-pressure magnetic susceptibility and de Haas-van Alphen Fermi surface experiments. Finally, electrical transport techniques have also been utilized for delivering significant amounts of electrical power to high pressure samples, for the purpose of performing high-pressure and -temperature experiments. Thus, not only do high-pressure electrical transport experiments provide much interesting and valuable data on the physical properties of materials extreme compression, but the underlying high-pressure electrical transport techniques can be used in a number of ways to develop additional diagnostic techniques and to advance high pressure capabilities.

Weir, S

2009-02-11T23:59:59.000Z

204

Natural attenuation of fuel hydrocarbon contaminants: Hydraulic conductivity dependency of biodegradation rates in a field case study  

SciTech Connect

Two biodegradation models are developed to represent natural attenuation of fuel-hydrocarbon contaminants as observed in a comprehensive natural-gradient tracer test in a heterogeneous aquifer on the Columbus Air Force Base in Mississippi. The first, a first-order mass loss model, describes the irreversible losses of BTEX and its individual components, i.e., benzene (B), toluene (T), ethyl benzene (E), and xylene (X). The second, a reactive pathway model, describes sequential degradation pathways for BTEX utilizing multiple electron acceptors, including oxygen, nitrate, iron and sulfate, and via methanogenesis. The heterogeneous aquifer is represented by multiple hydraulic conductivity (K) zones delineated on the basis of numerous flowmeter K measurements. A direct propagation artificial neural network (DPN) is used as an inverse modeling tool to estimate the biodegradation rate constants associated with each of the K zones. In both the mass loss model and the reactive pathway model, the biodegradation rate constants show an increasing trend with the hydraulic conductivity. The finding of correlation between biodegradation kinetics and hydraulic conductivity distributions is of general interest and relevance to characterization and modeling of natural attenuation of hydrocarbons in other petroleum-product contaminated sites.

Lu, Guoping; Zheng, Chunmiao

2003-07-15T23:59:59.000Z

205

Natural Attenuation of Fuel Hydrocarbon Contaminants: Correlation of Biodegradation with Hydraulic Conductivity in a Field Case Study  

SciTech Connect

Two biodegradation models are developed to represent natural attenuation of fuel-hydrocarbon contaminants as observed in a comprehensive natural-gradient tracer test in a heterogeneous aquifer on the Columbus Air Force Base in Mississippi, USA. The first, a first-order mass loss model, describes the irreversible losses of BTEX and its individual components, i.e., benzene (B), toluene (T), ethyl benzene (E), and xylene (X). The second, a reactive pathway model, describes sequential degradation pathways for BTEX utilizing multiple electron acceptors, including oxygen, nitrate, iron and sulfate, and via methanogenesis. The heterogeneous aquifer is represented by multiple hydraulic conductivity (K) zones delineated on the basis of numerous flowmeter K measurements. A direct propagation artificial neural network (DPN) is used as an inverse modeling tool to estimate the biodegradation rate constants associated with each of the K zones. In both the mass loss model and the reactive pathway model, the biodegradation rate constants show an increasing trend with the hydraulic conductivity. The finding of correlation between biodegradation kinetics and hydraulic conductivity distributions is of general interest and relevance to characterization and modeling of natural attenuation of hydrocarbons in other petroleum-product contaminated sites.

Lu, Guoping; Zheng, Chunmiao

2003-10-15T23:59:59.000Z

206

TRANSPORTATION Annual Report  

E-Print Network (OSTI)

2003 CENTER FOR TRANSPORTATION STUDIES Annual Report #12;Center for Transportation Studies University of Minnesota 200 Transportation and Safety Building 511 Washington Avenue S.E. Minneapolis, MN publication is a report of transportation research, education, and outreach activities for the period July

Minnesota, University of

207

Heavy media coal hydro-transport in Malinau, Indonesia: a process study  

Science Journals Connector (OSTI)

In Indonesia, coal transportation has traditionally been handled by trucks and by other mechanical means. With the expansion plan of coal production and increasing truck costs, Kayan Putra Utama Coal believes that alternative modes of transportation must be considered. For long distance transport of export size coal, one of the most viable options is to use coal slurry pipeline. This paper compares the technical issues involved in all coal pipeline options. Economic analysis compares the cost of transporting coal from the mines to ports by the best option of coal slurry pipeline or truck. On the basis of these comparisons, recommendations are made on how coal slurry pipeline can help in achieving proposed increased production targets and decreasing the operation's export coal transportation costs.

Antony Lesmana; Michael Hitch

2011-01-01T23:59:59.000Z

208

DFT+U Study of Polaronic Conduction in Li2O2 and Li2CO3: Implications for LiAir Batteries  

Science Journals Connector (OSTI)

DFT+U Study of Polaronic Conduction in Li2O2 and Li2CO3: Implications for LiAir Batteries ... The emission of greenhouse gases and the local pollution in the cities produced by the fossil fuel-powered vehicles (FFVs) is forcing the development of alternative power systems for automobiles. ... A delocalized solution was found. ...

J. M. Garcia-Lastra; J. S. G. Myrdal; R. Christensen; K. S. Thygesen; T. Vegge

2013-02-15T23:59:59.000Z

209

When is More Data Valuable to Human Operators? The Cognitive Engineering Laboratory (CEL) plans to conduct a microworld simulator study during the summer of 2014.  

E-Print Network (OSTI)

When is More Data Valuable to Human Operators? The Cognitive Engineering Laboratory (CEL) plans to conduct a microworld simulator study during the summer of 2014. The objective is to evaluate human only looked at operator performance under normal operating conditions. Will having additional sensor

210

Quantized ionic conductance in nanopores  

SciTech Connect

Ionic transport in nanopores is a fundamentally and technologically important problem in view of its ubiquitous occurrence in biological processes and its impact on DNA sequencing applications. Using microscopic calculations, we show that ion transport may exhibit strong non-liDearities as a function of the pore radius reminiscent of the conductance quantization steps as a function of the transverse cross section of quantum point contacts. In the present case, however, conductance steps originate from the break up of the hydration layers that form around ions in aqueous solution. Once in the pore, the water molecules form wavelike structures due to multiple scattering at the surface of the pore walls and interference with the radial waves around the ion. We discuss these effects as well as the conditions under which the step-like features in the ionic conductance should be experimentally observable.

Zwolak, Michael [Los Alamos National Laboratory; Lagerqvist, Johan [UCSD; Di Ventra, Massimilliano [UCSD

2009-01-01T23:59:59.000Z

211

Airflow and Pollutant Transport  

NLE Websites -- All DOE Office Websites (Extended Search)

Computational fluid dynamics flow diagram Computational fluid dynamics flow diagram Airflow and Pollutant Transport Research on airflow and pollutant transport integrates experimental and modeling research in order to understand the dispersion of airborne pollutants in buildings. The work applies to reducing health risks (for example, in the event of a toxic release in an occupied space), as well as to improving energy efficiency and occupant comfort. Investigators also conduct research to characterize and better understand the sources of airborne volatile, semi-volatile and particulate organic pollutants in the indoor environment, and studies of the physical and chemical processes that govern indoor air pollutant concentrations and exposures. The motivation is to contribute to the reduction of potential

212

Project EARTH-13-AH1: Isotopic studies of continental weathering -the transport of germanium in soils and plants  

E-Print Network (OSTI)

Project EARTH-13-AH1: Isotopic studies of continental weathering - the transport of germanium silicate weathering is important if we are to understand the carbon cycle 1,2 . The similarity of Ge and Si for weathering intensity3,7-9 . However, factors driving Ge behaviour in soil remain largely unknown although

Henderson, Gideon

213

IAEACN69/EXP2/12 Highly Radiative Plasmas for Local Transport Studies and Power and Particle  

E-Print Network (OSTI)

tool for local transport studies, because the distribution of power loss between radiation. The response of the electron and ion temperatures to greatly increased radiative losses from the electrons alpha heating power must be dispersed. [1] Heat removal by radiation from controlled injection

214

In-Vehicle Exposures to Particulate Air Pollution in Canadian Metropolitan Areas: The Urban Transportation Exposure Study  

Science Journals Connector (OSTI)

In-Vehicle Exposures to Particulate Air Pollution in Canadian Metropolitan Areas: The Urban Transportation Exposure Study ... Commuters may be exposed to increased levels of traffic-related air pollution owing to close proximity to traffic-emissions. ... We collected in-vehicle and roof-top air pollution measurements over 238 commutes in Montreal, Toronto, and Vancouver, Canada between 2010 and 2013. ...

Scott Weichenthal; Keith Van Ryswyk; Ryan Kulka; Liu Sun; Lance Wallace; Lawrence Joseph

2014-12-03T23:59:59.000Z

215

Numerical study of a bucked-coil system for muon transport and cooling  

SciTech Connect

A Neutrino Factory, which can deliver an intense flux of {approx}10{sup 21} neutrinos per year from a multi-GeV stored muon-beam is seemingly the ideal tool for studying neutrino oscillations and CP-violations for leptons. The front-end of this facility plays a critical role in determining the number of muons that can be accepted by the downstream accelerators. Delivering peak performance requires transporting the muon beams through long sections of a beam channel containing high-gradient rf cavities and strong focusing solenoids. Here, we propose a novel scheme to improve the performance of the cavities, thereby increasing the number of muons within the acceptance of the accelerator chain. The key element of our new scheme is to apply a set of bucked coils along the lattice, thus forcing the external magnetic field to drop substantially within the cavity. We incorporate this idea into a new lattice design for a Neutrino Factory, and detail its performance numerically.

Stratakis, Diktys; Alekou, Androula; Neuffer, David; Pasternak, Jaroslaw; Rogers, Chris T. [Brookhaven National Laboratory, Department of Physics, Upton, NY 11973 (United States); Imperial College London, Blackett Laboratory, Prince Consort Rd, London, SW7 2BW (United Kingdom); Fermi National Acceleartor Laboratory, Batavia, IL 60510 (United States); Imperial College London, Blackett Laboratory, Prince Consort Rd, London, SW7 2BW (United Kingdom) and Rutherford Appleton Laboratory, Chilton, Didcot (United Kingdom); Rutherford Appleton Laboratory, Chilton, Didcot (United Kingdom)

2012-12-21T23:59:59.000Z

216

Atomistic Studies of Cation Transport in Tetragonal ZrO2 During Zirconium Corrosion  

SciTech Connect

Zirconium alloys are the major fuel cladding materials in current reactors. The water-side corrosion is one of the major degradation mechanisms of these alloys. During corrosion the transport of oxidizing species in zirconium dioxide (ZrO2) determines the corrosion kinetics. Previously it has been argued that the outward diffusion of cation ions is important for forming protective oxides. In this work, the migration of Zr defects in tetragonal ZrO2 is studied with temperature accelerated dynamics and molecular dynamics simulations. The results show that Zr interstitials have anisotropic diffusion and migrate preferentially along the [001] or c direction in tetragonal ZrO2. The compressive stresses can increase the Zr interstitial migration barrier significantly. The migration barriers of some defect clusters can be much lower than those of point defects. The migration of Zr interstitials at some special grain boundaries is much slower than in a bulk oxide. The implications of these atomistic simulation results in the Zr corrosion are discussed.

Xian-Ming Bai; Yongfeng Zhang; Michael R. Tonks

2013-10-01T23:59:59.000Z

217

Comparative Analysis of Non-thermal Emissions and Study of Electron Transport in a Solar Flare  

E-Print Network (OSTI)

We study the non-thermal emissions in a solar flare occurring on 2003 May 29 by using RHESSI hard X-ray (HXR) and Nobeyama microwave observations. This flare shows several typical behaviors of the HXR and microwave emissions: time delay of microwave peaks relative to HXR peaks, loop-top microwave and footpoint HXR sources, and a harder electron energy distribution inferred from the microwave spectrum than from the HXR spectrum. In addition, we found that the time profile of the spectral index of the higher-energy ($\\gsim 100$ keV) HXRs is similar to that of the microwaves, and is delayed from that of the lower-energy ($\\lsim 100$ keV) HXRs. We interpret these observations in terms of an electron transport model called {\\TPP}. We numerically solved the spatially-homogeneous {\\FP} equation to determine electron evolution in energy and pitch-angle space. By comparing the behaviors of the HXR and microwave emissions predicted by the model with the observations, we discuss the pitch-angle distribution of the electrons injected into the flare site. We found that the observed spectral variations can qualitatively be explained if the injected electrons have a pitch-angle distribution concentrated perpendicular to the magnetic field lines rather than isotropic distribution.

T. Minoshima; T. Yokoyama; N. Mitani

2007-10-02T23:59:59.000Z

218

Tunneling conductance studies in the ion-beam sputtered CoFe/Mg/MgO/NiFe magnetic tunnel junctions  

SciTech Connect

Magnetic tunnel junctions consisting of CoFe(10 nm)/Mg(1 nm)/MgO(3.5 nm)/NiFe(10 nm) are grown at room temperature using dual ion beam sputtering via in-situ shadow masking. The effective barrier thickness and average barrier height are estimated to be 3.5 nm (2.9 nm) and 0.69 eV (1.09 eV) at 290 K (70 K), respectively. The tunnel magnetoresistance value of 0.2 % and 2.3 % was observed at 290 K and 60 K, respectively. The temperature dependence of tunneling conductance revealed the presence of localized states present within the forbidden gap of the MgO barrier leading to finite inelastic spin independent tunneling contributions, which degrade the TMR value.

Singh, Braj Bhusan; Chaudhary, Sujeet [Thin Film Laboratory, Department of Physics, Indian Institute of Technology Delhi, New Delhi 110016 (India)

2013-06-03T23:59:59.000Z

219

Study of formation and convective transport of aerosols using optical diagnostic technique  

E-Print Network (OSTI)

. To optimize VI performance, the characteristics of convective transport should be identified. This objective is achieved by visualization techniques. The applied visualization techniques are Mie-scattering and laser induced fluorescence (LIF). To investigate...

Kim, Tae-Kyun

2004-09-30T23:59:59.000Z

220

Vectorization on Monte Carlo particle transport: an architectural study using the LANL benchmark GAMTEB  

Science Journals Connector (OSTI)

Fully vectorized versions of the Los Alamos National Laboratory benchmark code Gamteb, a Monte Carlo photon transport algorithm, were developed for the Cyber 205/ETA-10 and Cray X-MP/Y-MP architectures. Single-processor performance measurements ...

P. J. Burns; M. Christon; R. Schweitzer; O. M. Lubeck; H. J. Wasserman

1989-08-01T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

Edge transport barrier studies on the Alcator C-Mod tokamak  

E-Print Network (OSTI)

Edge transport barriers (ETBs) in tokamak plasmas accompany transitions from low confinement (L-mode) to high confinement (H-mode) and exhibit large density and temperature gradients in a narrow pedestal region near the ...

Hughes, Jerry W. (Jerry Wayne), 1975-

2005-01-01T23:59:59.000Z

222

A geostatistical modeling study of the effect of heterogeneity on radionuclide transport in the  

E-Print Network (OSTI)

in the unsaturated zone, Yucca Mountain Hari S. Viswanathan*, Bruce A. Robinson, Carl W. Gable, James W. Carey Earth to contaminant transport in the unsaturated zone of Yucca Mountain. However, zeolitically altered areas are lower

Gable, Carl W.

223

A study of transport and impact strength of Fukushima nuclear pollutants in the north pacific surface  

Science Journals Connector (OSTI)

Based on the statistics of surface drifter data of 19792011 and the simulation of nuclear pollutant particulate movements simulated using high quality ocean reanalysis surface current dataset, the transport path...

Hongli Fu; Wei Li; Xuefeng Zhang; Guijun Han

2014-04-01T23:59:59.000Z

224

Rural ITS Safety Solution Systems University of Minnesota Center for Transportation Studies!  

E-Print Network (OSTI)

Rural ITS Safety Solution Systems (RITSS)! University of Minnesota ­ Center for Transportation! · Most Crashes Occur in Good Driving Conditions! ­ 54% of fatal and 2/3 of nonfatal occur during daylight

Minnesota, University of

225

Design and validation of a settling column for particle transport studies  

E-Print Network (OSTI)

the column and the advective- dispersive model. Average settling velocities predicted for the sewage sludge were estimated to be 2x10-s cm/sec in freshwater and 7x10-s cm/sec in saltwater. The sediments settled at 1x10-z cm/sec in freshwater and 3x10-z cm.... Objectives. I V V V I V I I I I X 1 2 LITERATURE REVIEW Particle Transport. Particle Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Measurement of Transport Characteristics. . . . . Sample Background...

Ducharme, Sharon Lynn

2012-06-07T23:59:59.000Z

226

Coupled forward-adjoint monte carlo simulations of radiative transport for the study of optical probe design in heterogeneous tissues  

E-Print Network (OSTI)

approximation to the radiative transport equation [3, 7, 15,form of the radiative transport equation (RTE) assumed to

Hayakawa, Carole K.; Spanier, Jerome; Venugopalan, Vasan

2007-01-01T23:59:59.000Z

227

The Sorption/Desorption Behavior of Uranium in Transport Studies Using Yucca Mountain Alluvium  

SciTech Connect

Yucca Mountain, Nevada is the proposed site of a geologic repository for the disposal of spent nuclear fuel and high-level radioactive waste in the United States. In the event repository engineered barriers fail, the saturated alluvium located south of Yucca Mountain is expected to serve as a natural barrier to the migration of radionuclides to the accessible environment. The purpose of this study is to improve the characterization of uranium retardation in the saturated zone at Yucca Mountain to support refinement of an assessment model. The distribution of uranium desorption rates from alluvium obtained from Nye County bore holes EWDP-19IM1, EWDP-10SA, EWDP-22SA were studied to address inconsistencies between results from batch sorption and column transport experiments. The alluvium and groundwater were characterized to better understand the underlying mechanisms of the observed behavior. Desorption rate constants were obtained using an activity based mass balance equation and column desorption experiments were analyzed using a mathematical model utilizing multiple sorption sites with different first-order forward and reverse reaction rates. The uranium desorption rate constants decreased over time, suggesting that the alluvium has multiple types of active sorption sites with different affinities for uranium. While a significant fraction of the initially sorbed uranium desorbed from the alluvium quite rapidly, a roughly equivalent amount remained sorbed after several months of testing. The information obtained through this research suggests that uranium may experience greater effective retardation in the alluvium than simple batch sorption experiments would suggest. Electron Probe Microanalysis shows that uranium is associated with both clay minerals and iron oxides after sorption to alluvial material. These results provide further evidence that the alluvium contains multiple sorption sites for uranium.

C. D. Scism

2006-02-15T23:59:59.000Z

228

Graduate Certificate in Transportation  

E-Print Network (OSTI)

Graduate Certificate in Transportation Nohad A. Toulan School of Urban Studies and Planning of Engineering and Computer Science integrated transportation systems. The Graduate Certificate in Transportation their capabilities. Students in the program can choose among a wide range of relevant courses in transportation

Bertini, Robert L.

229

transportation | OpenEI  

Open Energy Info (EERE)

transportation transportation Dataset Summary Description The 2009 National Household Travel Survey (NHTS) provides information to assist transportation planners and policy makers who need comprehensive data on travel and transportation patterns in the United States. The 2009 NHTS updates information gathered in the 2001 NHTS and in prior Nationwide Personal Transportation Surveys (NPTS) conducted in 1969, 1977, 1983, 1990, and 1995. Source U.S. Department of Transportation, Federal Highway Administration Date Released February 28th, 2011 (3 years ago) Date Updated Unknown Keywords NHTS TEF transportation Transportation Energy Futures travel trip Data application/zip icon Travel Day Trip File (zip, 42.6 MiB) application/zip icon Household File (zip, 5 MiB) application/zip icon Person File (zip, 17.4 MiB)

230

The Development and Application of Reactive Transport Modeling Techniques to Study Radionuclide Migration at Yucca Mountain, NV  

SciTech Connect

Yucca Mountain, Nevada has been chosen as a possible site for the first high level radioactive waste repository in the United States. As part of the site investigation studies, we need to make scientifically rigorous estimations of radionuclide migration in the event of a repository breach. Performance assessment models used to make these estimations are computationally intensive. We have developed two reactive transport modeling techniques to simulate radionuclide transport at Yucca Mountain: (1) the selective coupling approach applied to the convection-dispersion-reaction (CDR) model and (2) a reactive stream tube approach (RST). These models were designed to capture the important processes that influence radionuclide migration while being computationally efficient. The conventional method of modeling reactive transport models is to solve a coupled set of multi-dimensional partial differential equations for the relevant chemical components in the system. We have developed an iterative solution technique, denoted the selective coupling method, that represents a versatile alternative to traditional uncoupled iterative techniques and the filly coupled global implicit method. We show that selective coupling results in computational and memory savings relative to these approaches. We develop RST as an alternative to the CDR method for solving large two- or three-dimensional reactive transport simulations for cases in which one is interested in predicting the flux across a specific control plane. In the RST method, the multidimensional problem is reduced to a series of one-dimensional transport simulations along streamlines. The key assumption with RST is that mixing at the control plane approximates the transverse dispersion between streamlines. We compare the CDR and RST approaches for several scenarios that are relevant to the Yucca Mountain Project. For example, we apply the CDR and RST approaches to model an ongoing field experiment called the Unsaturated Zone Transport Test.

Viswanathan, Hari Selvi

1999-09-01T23:59:59.000Z

231

Study of the transport properties of organic semiconductors based on europium diphthalocyanine and bi-tris-phthalocyanine complexes with ortho-bis(oxymethyl)phenyl bridge and based on erbium and europium dinaphthalocyanine complexes  

SciTech Connect

The transport properties of organic semiconductors based on europium diphthalocyanine and bitris-phthalocyanine complexes with ortho-bis(oxymethyl)phenyl bridge and based on europium and erbium dinaphthalocyanine are studied. The temperature dependences of the dc conductivity for all types of the structures under study are obtained; it is shown that all dependences include two activation portions. For high-temperature portions, the activation energies are determined as 0.85 eV for europium diphthalocyanine with the ortho-bis(oxymethyl)phenyl bridge, 1.135 eV for europium bi-tris-phthalocyanine with the orthobis(oxymethyl)phenyl bridge, 0.98 eV for europium dinaphthalocyanine, and 1.18 eV for erbium dinaphthalocyanine. For the low-temperature activation portion, it is shown that lanthanide ions and their bond with a ligand make the dominant contribution to the conductivity of the structures under study.

Belogorokhov, I. A., E-mail: jugqwerty@mail.ru [State Research and Project Institute of Rare-Metal Industry GIREDMET (Russian Federation); Tikhonov, E. V. [Moscow State University (Russian Federation); Dronov, M. A. [Russian Academy of Sciences, Prokhorov General Physics Institute (Russian Federation); Ryabchikov, Yu. V. [Russian Academy of Sciences, Lebedev Physical Institute (Russian Federation); Pashkova, N. V.; Kladova, E. I. [State Research and Project Institute of Rare-Metal Industry GIREDMET (Russian Federation); Belogorokhova, L. I.; Tomilova, L. G.; Khokhlov, D. R. [Moscow State University (Russian Federation)

2011-11-15T23:59:59.000Z

232

The influence of Zn vacancy on thermal conductivity of {beta}-Zn{sub 4}Sb{sub 3}: A molecular dynamics study  

SciTech Connect

The influence of Zn vacancy on lattice thermal conductivity of {beta}-Zn{sub 4}Sb{sub 3} is studied by non-equilibrium molecular dynamics approach. The lattice thermal conductivity of single-crystal bulk {beta}-Zn{sub 4}Sb{sub 3} decreases rapidly when there is Zn vacancy, and then when the vacancy grows, the lattice thermal conductivity decreases further but rather slowly, which suggests a scaling law of k{sub v}{approx}n{sub v}{sup -{alpha}} of Zn atom vacancy (n{sub v}) to lattice thermal conductivity (k{sub vac}). This phenomenon is attributed to the fact that the existence of vacancy scattering can significantly decrease the mean free path. When the Zn atom vacant proportion reaches 10%, that is the vacancy model of {beta}-Zn{sub 4}Sb{sub 3}, the lattice thermal conductivity is 1.32 W/mk along the x-axis and 1.62 W/mk along the z-axis, respectively, which drops by {approx}90% that of its full occupancy model. Therefore, our calculations show that the 10% Zn atom vacancy in {beta}-Zn{sub 4}Sb{sub 3} is the main reason for its exceptionally low thermal conductivity, and the interstitial Zn atoms have little effect on the thermal conductivity of single-crystal {beta}-Zn{sub 4}Sb{sub 3}. - Graphical abstract: The bulk thermal conductivity (k{sub pure}) is 11.88 W/mk along the x-axis and 20.00 W/mk the z-axis. When it is 10% vacancy, namely the vacancy model of {beta}-Zn{sub 4}Sb{sub 3}, the thermal conductivity of {beta}-Zn{sub 4}Sb{sub 3} is 1.32 W/mk along the x-axis and 1.62 W/mk along the z-axis, respectively, which reduces by {approx}90% that of its full occupancy model. Our calculations show that the 10% Zn atom vacancy in the crystal structure of {beta}-Zn{sub 4}Sb{sub 3} is the main reason for its exceptionally low thermal conductivity, and the interstitial Zn atoms have little effect on the thermal conductivity of single-crystal {beta}-Zn{sub 4}Sb{sub 3}. Highlights: Black-Right-Pointing-Pointer The lattice stability of {beta}-Zn{sub 4}Sb{sub 3} decreases remarkably with the growing vacancy. Black-Right-Pointing-Pointer 10% Zn vacancy leads to its low thermal conductivity and structural instability. Black-Right-Pointing-Pointer Interstitial Zn atoms in {beta}-Zn{sub 4}Sb{sub 3} mainly stabilize the crystal structure.

Zhai, Pengcheng [Department of Engineering Structure and Mechanics, Wuhan University of Technology, Wuhan 430070 (China) [Department of Engineering Structure and Mechanics, Wuhan University of Technology, Wuhan 430070 (China); State Key Laboratory of Advanced Technology of Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070 (China); Li, Guodong; Wen, Pengfei [Department of Engineering Structure and Mechanics, Wuhan University of Technology, Wuhan 430070 (China)] [Department of Engineering Structure and Mechanics, Wuhan University of Technology, Wuhan 430070 (China); Li, Yao, E-mail: liyao06@126.com [Department of Engineering Structure and Mechanics, Wuhan University of Technology, Wuhan 430070 (China)] [Department of Engineering Structure and Mechanics, Wuhan University of Technology, Wuhan 430070 (China); Zhang, Qingjie; Liu, Lisheng [State Key Laboratory of Advanced Technology of Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070 (China)] [State Key Laboratory of Advanced Technology of Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070 (China)

2012-09-15T23:59:59.000Z

233

Measuring total longshore sediment transport with a LISST instrumented mini-sled.  

E-Print Network (OSTI)

A surf zone sediment transport study was conducted in Jamaica Beach, Texas, using new oceanographic equipment. A mini-sled was constructed and outfitted with an instrument package that consisted of two velocimeters, one current profiler, three OBS...

Huchzermeyer, Erick Karl

2006-04-12T23:59:59.000Z

234

Energy Consumption Characteristics of Light Manufacturing Facilities in The Northern Plains: A Study of Detailed Data from 10 Industrial Energy Audits Conducted in 1993  

E-Print Network (OSTI)

ENERGY CONSUMPTION CHARACTERISTICS OF LIGHT MANUFACTURING FACll..ITIES IN THE NORTHERN PLAINS: A study of detailed data from 10 industrial energy audits conducted in 1993. Michael Twedt Graduate Research Assistant IEOPIEADC South Dakota... profiles and common energy conservation opportunities. A statistical breakdown of energy consumption of 10 light manufacturing facilities by process, equipment type, and end use is provided. Common energy optimization procedures are also summarized...

Twedt, M.; Bassett, K.

235

Vadose Zone Transport Field Study: Soil Water Content Distributions by Neutron Moderation  

SciTech Connect

Contaminant transport through the vadose zone is a complex process controlled largely by interactions between subsurface lithologic features, water flow, and fluid properties. Understanding the processes controlling transport is an important prerequisite to the development and implementation of effective soil and ground water remediation programs. However, difficulties in directly observing and sampling the subsurface can complicate attempts to better describe subsurface transport processes and is mostly responsible for the large amount of uncertainty associated with vadose zone processes. The reduction of the uncertainty has been identified as a site need at Hanford by the STCG and the National Research Council (2000a) and is a key aspect of the site?s science and technology effort.

Ward, Anderson L.; Caldwell, Todd G.; Gee, Glendon W.

2000-10-01T23:59:59.000Z

236

Accident causation study on roadways with limited sight distance crest vertical curves  

E-Print Network (OSTI)

reflect the driver and vehicle population currently on the transportation network. An accident causation study was conducted to determine if roadways with limited stopping sight distance present a safety hazard for the transportation network. Rural two...

Stoddard, Angela May

2012-06-07T23:59:59.000Z

237

The study of charge transport through organic thin films: mechanism, tools and applications  

Science Journals Connector (OSTI)

...111816 Hutchison, K , J Gao, G Schick, Y Rubin, and F Wudl1999Bucky light bulbs: white light electroluminescence from a fluorescent C60 adduct-single layer organic LED. J. Am. Ceram. Soc. 121, 5611 Joachim, C 1999Electron transport through...

2007-01-01T23:59:59.000Z

238

Decisions to reduce greenhouse gases from agriculture and product transport: LCA case study of organic and conventional wheat  

Science Journals Connector (OSTI)

A streamlined hybrid life cycle assessment is conducted to compare the global warming potential (GWP) and primary energy use of conventional and organic wheat production and delivery in the US. Impact differences from agricultural inputs, grain farming, and transport processes are estimated. The GWP of a 1kg loaf of organic wheat bread is about 30g CO2-eq less than the conventional loaf. When organic wheat is shipped 420km farther to market, organic and conventional wheat systems have similar impacts. These results can change dramatically depending on soil carbon accumulation and nitrous oxide emissions from the two systems. Key parameters and their variability are discussed to provide producers, wholesale and retail consumers, and policymakers metrics to align their decisions with low-carbon objectives.

Kyle Meisterling; Constantine Samaras; Vanessa Schweizer

2009-01-01T23:59:59.000Z

239

In situ testing to determination field-saturated hydraulic conductivity of UMTRA Project disposal cell covers, liners, and foundation areas. Special study  

SciTech Connect

This special study was conducted to prepare a guidance document for selecting in situ hydraulic conductivity (K) tests, comparing in situ testing methods, and evaluating the results of such tests. This report may be used as a practical decision-making tool by the Uranium Mill Tailings Remedial Action (UMTRA) Project staff to determine which testing method will most efficiently achieve the field-saturated K results needed for long-term planning. A detailed section on near-surface test methods discusses each method which may be applicable to characterization of UMTRA disposal cell covers, liners and foundation materials. These potentially applicable test methods include the sealed double-ring infiltrometer (SDRI), the air-entry permeameter (AEP), the guelph permeameter, the two-stage borehole technique (TSB), the pressure infiltrometer, and the disk permeameter. Analytical solutions for these methods are provided, and limitations of these solutions are discussed, and a description of testing equipment design and installation are provided.

Not Available

1994-02-01T23:59:59.000Z

240

A computational study of ion conductance in the KcsA K+ using a NernstPlanck model with explicit resident ions  

E-Print Network (OSTI)

membranes, new transport mechanisms evolved to allow ionized substrates into the cell and release ionized waste products into the environment.1 For the membrane to retain vital cell compo- nents, the transport the ion and wa- ter cannot get past each other transport devices such that every living cell in nearly all

Lu, Benzhuo

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

Study on the beam transport from the Bio-Nano ECRIS  

SciTech Connect

The beam transport of N{sup +} ion and C{sub 60}{sup +} ion in the Bio-Nano ECRIS with min-B configuration was investigated based on the ion beam profiles. The N{sup +} beam could be focused under the low-beam current conditions. Also the C{sub 60}{sup +} beam could be focused in spite of the large space-charge effect which will lead the divergence of the beam. We confirmed that our beam transport system works well even for the C{sub 60}{sup +} ion beam. We estimated the highest C{sub 60}{sup +} beam current with the focused beam profile by comparing the N{sup +} ion beam.

Uchida, T. [Bio-Nano Electronics Research Centre, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585 (Japan); Minezaki, H.; Yoshida, Y. [Bio-Nano Electronics Research Centre, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585 (Japan); Graduate School of Engineering, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585 (Japan); Oshima, K. [Graduate School of Engineering, Toyo University, 2100, Kujirai, Kawagoe, Saitama 350-8585 (Japan); Racz, R.; Biri, S. [Institute of Nuclear Research (ATOMKI), H-4026 Debrecen, Bem ter 18/c (Hungary); Muramatsu, M.; Kitagawa, A. [National Institute of Radiological Sciences (NIRS), 4-9-1 Anagawa, Inage-ku, Chiba-shi, Chiba 263-8555 (Japan); Asaji, T. [Tateyama Machine Co., Ltd., 30 Shimonoban, Toyama-shi, Toyama 930-1305 (Japan); Kato, Y. [Graduate School of Engineering, Osaka University, 2-1 Yamada-oka, Suita-shi, Osaka 565-0871 (Japan)

2012-02-15T23:59:59.000Z

242

Charge transport mechanisms of graphene/semiconductor Schottky barriers: A theoretical and experimental study  

SciTech Connect

Graphene has been proposed as a material for semiconductor electronic and optoelectronic devices. Understanding the charge transport mechanisms of graphene/semiconductor Schottky barriers will be crucial for future applications. Here, we report a theoretical model to describe the transport mechanisms at the interface of graphene and semiconductors based on conventional semiconductor Schottky theory and a floating Fermi level of graphene. The contact barrier heights can be estimated through this model and be close to the values obtained from the experiments, which are lower than those of the metal/semiconductor contacts. A detailed analysis reveals that the barrier heights are as the function of the interface separations and dielectric constants, and are influenced by the interfacial states of semiconductors. Our calculations show how this behavior of lowering barrier heights arises from the Fermi level shift of graphene induced by the charge transfer owing to the unique linear electronic structure.

Zhong, Haijian; Liu, Zhenghui; Xu, Gengzhao; Shi, Lin; Fan, Yingmin; Yang, Hui [Suzhou Institute of Nano-Tech and Nano-Bionics, CAS, Suzhou 215123 (China); Xu, Ke, E-mail: kxu2006@sinano.ac.cn; Wang, Jianfeng; Ren, Guoqiang [Suzhou Institute of Nano-Tech and Nano-Bionics, CAS, Suzhou 215123 (China); Suzhou Nanowin Science and Technology Co., Ltd., Suzhou 215123 (China)

2014-01-07T23:59:59.000Z

243

Modelling transport fuel demand  

Science Journals Connector (OSTI)

Transport fuels account for an increasing share of oil ... interest to study the economics of the transport fuel market and thereby to evaluate the efficiency of the price mechanism as an instrument of policy in ...

Thomas Sterner; Carol A. Dahl

1992-01-01T23:59:59.000Z

244

Mesh generation and energy group condensation studies for the jaguar deterministic transport code  

SciTech Connect

The deterministic transport code Jaguar is introduced, and the modeling process for Jaguar is demonstrated using a two-dimensional assembly model of the Hoogenboom-Martin Performance Benchmark Problem. This single assembly model is being used to test and analyze optimal modeling methodologies and techniques for Jaguar. This paper focuses on spatial mesh generation and energy condensation techniques. In this summary, the models and processes are defined as well as thermal flux solution comparisons with the Monte Carlo code MC21. (authors)

Kennedy, R. A.; Watson, A. M.; Iwueke, C. I.; Edwards, E. J. [Knolls Atomic Power Laboratory, Bechtel Marine Propulsion Corporation, P.O. Box 1072, Schenectady, NY 12301-1072 (United States)

2012-07-01T23:59:59.000Z

245

Small scale laboratory studies of flow and transport phenomena in pores and fractures: Phase 2. Technical completion report  

SciTech Connect

Pore level laboratory experiments using microscopy permit the in situ visualization of flow and transport phenomena, that can be recorded on film or videotape. One of the principal tools for visualization is the etched glass micromodel, which is composed of a transparent two dimensional network of three dimensional pores. The spatial scale of interest in these models extends from the individual pore, up to a network of pores, perhaps with small scale heterogeneities. Micromodels are best used to help validate concepts and assumptions, and to elucidate new, previously unrecognized phenomena for further study. They are not quantitative tools, but should be used in combination with quantitative tools such as column studies or mathematical models. There are three applications: multi-phase flow, colloid transport, and bacterial transport and colonization. Specifically the authors have examined behavior of relevance to liquid-liquid mass transfer (solubilization of capillary trapped organic liquids); liquid-gas mass transfer (in situ volatilization); mathematical models of multi-phase pressure-saturation relationships; colloid movement, attachment and detachment in the presence of fluid-fluid interfaces, clay interference with multi-phase flow; and heterogeneity effects on multi-phase flow and colloid movement.

Wilson, J.L.

1997-01-01T23:59:59.000Z

246

Towards integrated sustainable transportation profile: a case study of Gharb El-Balad district, Assiut City, Egypt  

Science Journals Connector (OSTI)

Despite transportation is a key necessity for humans, it was argued a significant contributor to environmental degradation. Responding to that, drafts of sustainable transportation (ST) were sketched, guiding principles were argued, and rating systems were pursued. However, the selection of the appropriate method to implement ST is a challengeable task; not only due to the diversity and multidimensionality of local contexts, but also due to the numerous attributes of ST and their varying relative weights. This paper aims at defining an integrated profile of ST. Firstly, the motive behind tackling the issue was introduced and the methodology was worked out. Definitions, guiding principles, indicators, and rating systems were reviewed. After that, taxonomy of ST indicators was carried out, the interrelationship of key-attributes was investigated, and strategic directions to ST were proposed, to be applied over a selected case study. At last, a discussion took place highlighting the opportunities and challenges.

Khaled Ali Youssef; Moataz Mohmoud

2011-01-01T23:59:59.000Z

247

DOE Order Self Study Modules - DOE O 460.1C Packaging and Transportation Safety and DOE O 460.2A Departmental Materials Transportation and Packaging Management  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

60.1C 60.1C PACKAGING AND TRANSPORTATION SAFETY DOE O 460.2A DEPARTMENTAL MATERIALS TRANSPORTATION AND PACKAGING MANAGEMENT DOE O 460.1C and 460.2A Familiar Level June 2011 1 DOE O 460.1C PACKAGING AND TRANSPORTATION SAFETY DOE O 460.2A DEPARTMENTAL MATERIALS TRANSPORTATION AND PACKAGING MANAGEMENT FAMILIAR LEVEL _________________________________________________________________________ OBJECTIVES Given the familiar level of this module and the resources, you will be able to perform the following: 1. What are the objectives of U.S. Department of Energy (DOE) O 460.1C? 2. What is the DOE/National Nuclear Security Administration (NNSA) exemption process in DOE O 460.1C? 3. What are the onsite safety requirements specified by DOE O 460.1C? 4. What are the objectives of DOE O 460.2A?

248

Model Recovery Procedure for Response to a Radiological Transportation Incident  

Energy.gov (U.S. Department of Energy (DOE))

This Transportation Emergency Preparedness Program (TEPP) Model Recovery Procedure contains the recommended elements for developing and conducting recovery planning at transportation incident scene...

249

Heat transport properties of clean spin ladders coupled to phonons: Umklapp scattering and drag  

E-Print Network (OSTI)

Heat transport properties of clean spin ladders coupled to phonons: Umklapp scattering and drag E; published 17 December 2007 We study the low-temperature heat transport in clean two-leg spin-ladder compounds coupled to three- dimensional phonons. We argue that the very large heat conductivities observed

Mehta, Pankaj

250

Evaluation of atmospheric transport models for use in Phase II of the historical public exposures studies at the Rocky Flats Plant  

SciTech Connect

Five atmospheric transport models were evaluated for use in Phase II of the Historical Public Exposures Studies at the Rocky Flats Plant. Models included a simple straight-line Gaussian plume model (ISCST2), several integrated puff models (RATCHET, TRIAD, and INPUFF2), and a complex terrain model (TRAC). Evaluations were based on how well model predictions compared with sulfur hexafluoride tracer measurements taken in the vicinity of Rocky Flats in February 1991. Twelve separate tracer experiments were conducted, each lasting 9 hr and measured at 140 samplers in arcs 8 and 16 km from the release point at Rocky Flats. Four modeling objectives were defined based on the endpoints of the overall study: (1) the unpaired maximum hourly average concentration, (2) paired time-averaged concentration, (3) unpaired time-averaged concentration, and (4) arc-integrated concentration. Performance measures were used to evaluate models and focused on the geometric mean and standard deviation of the predicted-to-observed ratio and the correlation coefficient between predicted and observed concentrations. No one model consistently outperformed the others in all modeling objectives and performance measures. The overall performance of the RATCHET model was somewhat better than the other models.

Rood, A.S.; Killough, G.G.; Till, J.E.

1999-08-01T23:59:59.000Z

251

A CASE STUDY OF CHLORINE TRANSPORT AND FATE FOLLOWING A LARGE ACCIDENTAL RELEASE  

SciTech Connect

A train derailment that occurred in Graniteville, South Carolina during the early morning hours of 06 January, 2005 resulted in the prompt release of approximately 60 tons of chlorine to the environment. Comprehensive modeling of the transport and fate of this release was performed including the characterization of the initial three-phased chlorine release, a detailed determination of the local atmospheric conditions acting to generate, disperse, and deplete the chlorine vapor cloud, the establishment of physical exchange mechanisms between the airborne vapor and local surface waters, and local aquatic dilution and mixing.

Buckley, R.; Hunter, C.; Werth, D.; Whiteside, M.; Chen, K.; Mazzola, C.

2012-08-01T23:59:59.000Z

252

Transportation | Argonne National Laboratory  

NLE Websites -- All DOE Office Websites (Extended Search)

Transportation Transportation From modeling and simulation programs to advanced electric powertrains, engines, biofuels, lubricants, and batteries, Argonne's transportation research is vital to the development of next-generation vehicles. Revolutionary advances in transportation are critical to reducing our nation's petroleum consumption and the environmental impact of our vehicles. Some of the most exciting new vehicle technologies are being ushered along by research conducted at Argonne National Laboratory. Our Transportation Technology R&D Center (TTRDC) brings together scientists and engineers from many disciplines across the laboratory to work with the U.S. Department of Energy (DOE), automakers and other industrial partners. Our goal is to put new transportation technologies on the road that improve

253

Comparative study of micromixing models in transported scalar PDF simulations of turbulent nonpremixed bluff body flames  

SciTech Connect

Numerical simulation results are presented for turbulent jet diffusion flames with various levels of turbulence-chemistry interaction, stabilized behind a bluff body (Sydney Flames HM1-3). Interaction between turbulence and combustion is modeled with the transported joint-scalar PDF approach. The mass density function transport equation is solved in a Lagrangian manner. A second-moment-closure turbulence model is applied to obtain accurate mean flow and turbulent mixing fields. The behavior of two micromixing models is discussed: the Euclidean minimum spanning tree model and the modified Curl coalescence dispersion model. The impact of the micromixing model choice on the results in physical space is small, although some influence becomes visible as the amount of local extinction increases. Scatter plots and profiles of conditional means and variances of thermochemical quantities, conditioned on the mixture fraction, are discussed both within and downstream of the recirculation region. A distinction is made between local extinction and incomplete combustion, based on the CO species mass fraction. The differences in qualitative behavior between the micromixing models are explained and quantitative comparison to experimental data is made. (author)

Merci, Bart [Department of Flow, Heat and Combustion Mechanics, Ghent University-UGent, Ghent (Belgium); Roekaerts, Dirk [Department of Multi-Scale Physics, Delft University of Technology, Delft (Netherlands); Naud, Bertrand [CIEMAT, Madrid (Spain); Pope, Stephen B. [Mechanical and Aerospace Engineering, Cornell University, Ithaca, NY (United States)

2006-07-15T23:59:59.000Z

254

Theoretical study of heat transport in thermoacoustic stacks having arbitrary plate separation.  

Science Journals Connector (OSTI)

Thermoacoustic heat engines can be simply described as devices where heat transport is caused by the interaction between a standing wave and a stationary parallel plate structure called the stack. Simplified calculations of this heat transport have been discussed previously which assume perfect standing waves (infinite standing wave ratio) and plate separations that are large relative to a thermal penetration depth. A theory will be presented that is generalized to describe systems with arbitrary plate separation and SWR. Using this theory the spectrum of heat engine designs that span classic thermoacoustic engines on the one extreme and Stirling cycle engines on the other extreme can be compared. Some results are that Stirling cycle engines can be more efficient than standard thermoacoustic engines and that given some practical constraints thermoacoustic engines can deliver more power than a comparable Stirling engine. Other results may help to design an improved engine that combines the characteristics of both thermoacoustic and Stirling engines. [Work supported by ONR and NRL.

Thomas J. Hofler

1992-01-01T23:59:59.000Z

255

Particle transport studies for single-null divertor discharges in DIII-D  

SciTech Connect

In this paper an investigation of the particle confinement for beam-heated single-null discharges in the open divertor configuration of Doublet III-D (DIII-D) [E. J. Doyle [ital et] [ital al]., Phys. Fluids B [bold 3], 2300 (1991)] is described. Results are based on a Monte Carlo neutral transport model with a relatively simple plasma model that utilizes experimental data on density, temperature, and heat flux profiles in the edge plasma. For a typical discharge, it is found that the particle confinement time in the quiescent H-mode phase is only about a factor of 2 larger than during the L-mode phase, an increase comparable to the energy confinement time increase. For both H-mode and L-mode phases the particle confinement time is about a factor of 4 larger than the energy confinement time. It is also found that the core plasma fueling rate is higher in the H mode due to the increased transparency of a thinner scrape-off layer. The longer particle confinement time and the increased fueling rate both contribute to the observed density rise during the quiescent period following the L--H transition. Flux surface-averaged transport modeling of the time evolution for the core plasma density profile during H mode suggests that a strong inward particle pinch is necessary near the separatrix.

Rensink, M.E.; Allen, S.L.; Futch, A.H.; Hill, D.N.; Porter, G.D. (Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)); Mahdavi, M.A. (General Atomics, San Diego, California 92186-9784 (United States))

1993-07-01T23:59:59.000Z

256

Particle transport studies for single?null divertor discharges in DIII?D  

Science Journals Connector (OSTI)

In this paper an investigation of the particle confinement for beam?heated single?null discharges in the open divertor configuration of Doublet III?D (DIII?D) [E. J. Doyle et al. Phys. Fluids B 3 2300 (1991)] is described. Results are based on a Monte Carlo neutral transport model with a relatively simple plasma model that utilizes experimental data on density temperature and heat flux profiles in the edge plasma. For a typical discharge it is found that the particle confinement time in the quiescent H?mode phase is only about a factor of 2 larger than during the L?mode phase an increase comparable to the energy confinement time increase. For both H?mode and L?mode phases the particle confinement time is about a factor of 4 larger than the energy confinement time. It is also found that the core plasma fueling rate is higher in the H mode due to the increased transparency of a thinner scrape?off layer. The longer particle confinement time and the increased fueling rate both contribute to the observed density rise during the quiescent period following the LH transition. Flux surface?averaged transport modeling of the time evolution for the core plasma density profile during H mode suggests that a strong inward particle pinch is necessary near the separatrix.

M. E. Rensink; S. L. Allen; A. H. Futch; D. N. Hill; G. D. Porter; M. A. Mahdavi

1993-01-01T23:59:59.000Z

257

Surface Morphology and Transport Studies of Epitaxial Graphene on SiC(000-1)  

SciTech Connect

Annealing conditions are critical to the properties of epitaxial graphene formed by thermal decomposition of silicon carbide. Here, we report the evolution of coherent electronic transport with increasing anneal temperatures, combined with low energy electron micrographs of equivalent surfaces showing corresponding structural coherence. Ultrahigh vacuum conditions and temperatures in the range of 1250-1300 C produce granular films with a lateral grain size of {approx}20 nm, while temperatures of 1400 C or higher result in grains with progressively larger lateral dimensions in the micron range. Transport measurements show how the electronic coherence length increases as a result of the more coherent physical structure, with a crossover from two-dimensional variable range hopping to the weak localization regime. Here, we show that while the duration of the anneal affects coverage and clustering of grains, the size of individual grains is determined by anneal temperature, with evidence of coalescence of smaller grains into larger domains, suggesting that multistage anneals at different temperatures may yield high-quality graphene.

G Creeth; A Strudwick; J Sadowski; C Marrows

2011-12-31T23:59:59.000Z

258

Effects of chemical modifications and MMT nanoclay addition on transport phenomena of naturally woven coconut sheath/polyester nanocomposites  

Science Journals Connector (OSTI)

Studies on the behavior of molecular transport properties such as thermal conductivity, gas permeability, volume and surface resistivity have been carried out for the naturally woven coconut sheath (CS) fiber rei...

N. Rajini; J. T. Winowlin Jappes; S. Rajakarunakaran

2013-08-01T23:59:59.000Z

259

Evaluation of Atmospheric Transport Models for Use in Phase II of the Historical Public Exposures Studies at the Rocky Flats Plant  

Science Journals Connector (OSTI)

Five atmospheric transport models were evaluated for use in Phase II of the Historical Public Exposures Studies at the Rocky Flats Plant. Models included a simple straight-line ... hexafluoride tracer measurement...

Arthur S. Rood; George G. Killough; John E. Till

1999-08-01T23:59:59.000Z

260

Student Affairs STUDENT CONDUCT  

E-Print Network (OSTI)

Student Affairs CODE OF STUDENT CONDUCT 2014-15 #12;Contents Letter from the Dean of Students ....................................................................ii Binghamton University's Code of Student Conduct Preamble...................... 1 Section I: Rules of Student Conduct.............................................................. 1 Section II: Definitions

Suzuki, Masatsugu

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


261

Chernobyl Studies Project - working group 7.0 environmental transport and health effects. Progress report, October 1993--January 1994  

SciTech Connect

The DOE-funded Chernobyl Studies Project was begun as part of a cooperative agreement between the US and the former USSR, (quote) To develop jointly methods to project rapidly the health effects of any future reactor accident (quote). Most of the initial tasks for this project are completed or near completion. The focus has now turned primarily to the issue of health effects from the Chernobyl accident. Currently, we are extensively engaged in case-control and cohort studies of thyroid diseases among Belarussian children and in the Ukraine. A major part of the effort is providing methods and applications of dose reconstruction and providing support and equipment for the medical teams. This document contains reports on progress in the following task areas: Management; External Dose; Hydrological Transport; Chromosome Painting Dosimetry; Stochastic Effects; Thyroid Studies; and Leukemia Studies.

Hendrickson, S.M. [ed.

1994-03-01T23:59:59.000Z

262

Nanoscale study of reactive transport in catalyst layer of proton exchange membrane fuel cells with precious and non-precious catalysts using lattice Boltzmann method  

E-Print Network (OSTI)

High-resolution porous structures of catalyst layer (CL) with multicomponent in proton exchange membrane fuel cells are reconstructed using a reconstruction method called quartet structure generation set. Characterization analyses of nanoscale structures are implemented including pore size distribution, specific area and phase connectivity. Pore-scale simulation methods based on the lattice Boltzmann method are developed and used to predict the macroscopic transport properties including effective diffusivity and proton conductivity. Nonuniform distributions of ionomer in CL generates more tortuous pathway for reactant transport and greatly reduces the effective diffusivity. Tortuosity of CL is much higher than conventional Bruggeman equation adopted. Knudsen diffusion plays a significant role in oxygen diffusion and significantly reduces the effective diffusivity. Reactive transport inside the CL is also investigated. Although the reactive surface area of non-precious metal catalyst (NPMC) CL is much higher t...

Chen, Li; Kang, Qinjun; Holby, Edward F; Tao, Wen-Quan

2014-01-01T23:59:59.000Z

263

Study of stable p-type conductivity in bismuth-doped ZnO films grown by pulsed-laser deposition  

Science Journals Connector (OSTI)

Bismuth-doped p-type ZnO films were grown on sapphire (0001) substrates by pulsed-laser deposition at 600?C in 1?mT oxygen pressure. The photoluminescence (PL) property of the as-grown and post-annealed Bi-doped p-type ZnO films at 10300?K has been investigated. A well-resolved PL spectrum was obtained with acceptor bound exciton emission and conduction band to acceptor transition giving direct evidence for the creation of acceptors. The acceptor energy level of the bismuth dopant is found to be 0.13?eV above valance band. The binding energy between the acceptor and the exciton measured as a function of temperature was found to be 14?meV. A hole concentration of 5.36?1018cm?3 and a mobility of 8.9?cm2/Vs was obtained for 3% bismuth-doped and annealed ZnO thin films. This study suggests that bismuth is an excellent dopant to obtain stable and reproducible p-type conductivity in ZnO for the application in optoelectronic devices.

J. W. Lee; N. G. Subramaniam; J. C. Lee; S. Kumar S; T. W. Kang

2011-01-01T23:59:59.000Z

264

Human radiation studies: Remembering the early years: Oral history of cell biologist Don Francis Petersen, Ph.D., conducted November 29, 1994  

SciTech Connect

This report is a transcript of an interview of Dr. Don Francis Petersen by representatives of the US DOE Office of Human Radiation Experiments. Dr. Petersen was selected for this interview because of his long research career at Los Alamos and his knowledge of the Atomic Energy Commission`s biomedical program. Dr. Petersen did not personally conduct research on human subjects. After a brief biographical sketch Dr. Petersen discusses his remembrances of the early use of radionuclides as biological tracers, aspects of nuclear weapons testing in the 1940`s and 1950`s including fallout studies, the means by which research projects were approved, use of humans in the whole-body counter, and the Health Division Biomedical responsibilities.

NONE

1995-08-01T23:59:59.000Z

265

Source Emissions and Transport  

NLE Websites -- All DOE Office Websites (Extended Search)

electron micrograph image, Lara Gundel with instrumentation electron micrograph image, Lara Gundel with instrumentation Source Emissions and Transport Investigators conduct research here to characterize and better understand the sources of airborne volatile, semi-volatile and particulate organic pollutants in the indoor environment. This research includes studies of the physical and chemical processes that govern indoor air pollutant concentrations and exposures. The motivation is to contribute to the reduction of potential human health effects. Contacts Randy Maddalena RLMaddalena@lbl.gov (510) 486-4924 Mark Mendell MJMendell@lbl.gov (510) 486-5762 Links Pollutant Sources, Dynamics and Chemistry Group Batteries and Fuel Cells Buildings Energy Efficiency Electricity Grid Energy Analysis Energy Technologies Environmental Impacts

266

Transportation Services  

NLE Websites -- All DOE Office Websites (Extended Search)

Transportation Services Transporting nuclear materials within the United States and throughout the world is a complicated and sometimes highly controversial effort requiring...

267

Local Transportation  

E-Print Network (OSTI)

Local Transportation. Transportation from the Airport to Hotel. There are two types of taxi companies that operate at the airport: special and regular taxis (

268

Chamber transport  

SciTech Connect

Heavy ion beam transport through the containment chamber plays a crucial role in all heavy ion fusion (HIF) scenarios. Here, several parameters are used to characterize the operating space for HIF beams; transport modes are assessed in relation to evolving target/accelerator requirements; results of recent relevant experiments and simulations of HIF transport are summarized; and relevant instabilities are reviewed. All transport options still exist, including (1) vacuum ballistic transport, (2) neutralized ballistic transport, and (3) channel-like transport. Presently, the European HIF program favors vacuum ballistic transport, while the US HIF program favors neutralized ballistic transport with channel-like transport as an alternate approach. Further transport research is needed to clearly guide selection of the most attractive, integrated HIF system.

OLSON,CRAIG L.

2000-05-17T23:59:59.000Z

269

Thermal and Electrical Transport in Oxide Heterostructures  

E-Print Network (OSTI)

2.3.1 Electrical transport . . . . . . . . . . . . . . . .3.5 Controlling electrical conductivity and opticalthe variation of electrical and thermal con- ductivity and

Ravichandran, Jayakanth

2011-01-01T23:59:59.000Z

270

Energy Information Administration - Transportation Energy Consumption...  

U.S. Energy Information Administration (EIA) Indexed Site

Energy Consumption Transportation Energy Consumption Surveys energy used by vehicles EIA conducts numerous energy-related surveys and other information programs. In general, the...

271

Optically Transparent Porous Medium for Nondestructive Studies of Microbial Biofilm Architecture and Transport Dynamics  

Science Journals Connector (OSTI)

...1998. Handbook of polymers. Wiley-Interscience...Busscher. 1999. Models for studying initial...Ever see a water flood? Oil Gas J. 59...A new colloidal model system to study long-range...colloids within a model porous medium. Biofilms...0 Culture Media 0 Polymers 9002-84-0 Polytetrafluoroethylene...

Andrew P. Leis; Sven Schlicher; Hilmar Franke; Martin Strathmann

2005-08-01T23:59:59.000Z

272

Code of Conduct  

NLE Websites -- All DOE Office Websites (Extended Search)

Governance » Governance » Ethics, Accountability » Code of Conduct Code of Conduct Helping employees recognize and resolve the ethics and compliance issues that may arise in their daily work. Contact Code of Conduct (505) 667-7506 Code of Conduct LANL is committed to operating in accordance with the highest standards of ethics and compliance and with its core values of service to our nation, ethical conduct and personal accountability, excellence in our work, and mutual respect and teamwork. LANL must demonstrate to customers and the public that the Laboratory is accountable for its actions and that it conducts business in a trustworthy manner. What is LANL's Code of Conduct? Charlie McMillan 1:46 Laboratory Director Charlie McMillan introduces the code LANL's Code of Conduct is designed to help employees recognize and

273

JLF Conduct of Operations  

NLE Websites -- All DOE Office Websites (Extended Search)

Jupiter Laser Facility (JLF) Conduct Of Operations The Conduct of Operations is a set of procedures and guidelines that are put in place to ensure operational safety and security...

274

Nanoscale thermal transport. II. 20032012  

SciTech Connect

A diverse spectrum of technology drivers such as improved thermal barriers, higher efficiency thermoelectric energy conversion, phase-change memory, heat-assisted magnetic recording, thermal management of nanoscale electronics, and nanoparticles for thermal medical therapies are motivating studies of the applied physics of thermal transport at the nanoscale. This review emphasizes developments in experiment, theory, and computation in the past ten years and summarizes the present status of the field. Interfaces become increasingly important on small length scales. Research during the past decade has extended studies of interfaces between simple metals and inorganic crystals to interfaces with molecular materials and liquids with systematic control of interface chemistry and physics. At separations on the order of ?1?nm, the science of radiative transport through nanoscale gaps overlaps with thermal conduction by the coupling of electronic and vibrational excitations across weakly bonded or rough interfaces between materials. Major advances in the physics of phonons include first principles calculation of the phonon lifetimes of simple crystals and application of the predicted scattering rates in parameter-free calculations of the thermal conductivity. Progress in the control of thermal transport at the nanoscale is critical to continued advances in the density of information that can be stored in phase change memory devices and new generations of magnetic storage that will use highly localized heat sources to reduce the coercivity of magnetic media. Ultralow thermal conductivitythermal conductivity below the conventionally predicted minimum thermal conductivityhas been observed in nanolaminates and disordered crystals with strong anisotropy. Advances in metrology by time-domain thermoreflectance have made measurements of the thermal conductivity of a thin layer with micron-scale spatial resolution relatively routine. Scanning thermal microscopy and thermal analysis using proximal probes has achieved spatial resolution of 10?nm, temperature precision of 50 mK, sensitivity to heat flows of 10 pW, and the capability for thermal analysis of sub-femtogram samples.

Cahill, David G., E-mail: d-cahill@illinois.edu; Braun, Paul V. [Department of Materials Science and Engineering and the Frederick Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States); Chen, Gang [Department of Mechanical Engineering, MIT, Cambridge, Massachusetts 02139 (United States); Clarke, David R. [School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138 (United States); Fan, Shanhui [Department of Electrical Engineering, Stanford University, Stanford, California 94305 (United States); Goodson, Kenneth E. [Department of Mechanical Engineering, Stanford University, Stanford, California 94305 (United States); Keblinski, Pawel [Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York 12180 (United States); King, William P. [Department of Mechanical Sciences and Engineering, University of Illinois, Urbana, Illinois 61801 (United States); Mahan, Gerald D. [Department of Physics, Penn State University, University Park, Pennsylvania 16802 (United States); Majumdar, Arun [Department of Mechanical Engineering, University of California, Berkeley, California 94720 (United States); Maris, Humphrey J. [Department of Physics, Brown University, Providence, Rhode Island 02912 (United States); Phillpot, Simon R. [Department of Materials Science and Engineering, University of Florida, Gainseville, Florida 32611 (United States); Pop, Eric [Department of Electrical and Computer Engineering, University of Illinois, Urbana, Illinois 61801 (United States); Shi, Li [Department of Mechanical Engineering, University of Texas, Autin, Texas 78712 (United States)

2014-03-15T23:59:59.000Z

275

Effects of confinement on water structure and dynamics and on proton transport: a molecular simulation study  

E-Print Network (OSTI)

Classical molecular dynamics (MD) simulations are performed to study structural and dynamic properties of water confined within graphite surfaces. The surfaces are separated at distances varying between 7 and 14.5 and the water density is held...

Hirunsit, Pussana

2009-05-15T23:59:59.000Z

276

Heat transport through ion crystals  

E-Print Network (OSTI)

We study the thermodynamical properties of crystals of trapped ions which are laser cooled to two different temperatures in two separate regions. We show that these properties strongly depend on the structure of the ion crystal. Such structure can be changed by varying the trap parameters and undergoes a series of phase transitions from linear to zig-zag or helicoidal configurations. Thus, we show that these systems are ideal candidates to observe and control the transition from anomalous to normal heat transport. All structures behave as `heat superconductors', with a thermal conductivity increasing linearly with system size and a vanishing thermal gradient inside the system. However, zig-zag and helicoidal crystals turn out to be hyper sensitive to disorder having a linear temperature profile and a length independent conductivity. Interestingly, disordered 2D ion crystals are heat insulators. Sensitivity to disorder is much smaller in the 1D case.

Nahuel Freitas; Esteban Martinez; Juan Pablo Paz

2013-12-23T23:59:59.000Z

277

Office of Secure Transportation Activities  

Energy.gov (U.S. Department of Energy (DOE))

Our MissionTo provide safe and secure ground and air transportation of nuclear weapons, nuclear weapons components, and special nuclear materials and conduct other missions supporting the national...

278

Electrical conductivity of shock compressed xenon  

Science Journals Connector (OSTI)

The results on measurements of electrical conductivity of shock compressed gaseous and liquid xenon are discussed. Thermodynamical parameters of xenon are calculated in frames of plasma chemical model. To estimate electrical conductivity modified Ziman theory is used. A reasonable agreement between experimental and theoretical data on equation of state and transport properties is shown in a wide range of parameters from gas to liquid densities pressures 10140 GPa and temperatures >5000 K. New experimental data on measurements of equation of state and conductivity of xenon under multiple shock compression are presented.

Victor B. Mintsev; Vladimir Ya. Ternovoi; Victor K. Gryaznov; Alexei A. Pyalling; Vladimir E. Fortov; Igor L. Iosilevskii

2000-01-01T23:59:59.000Z

279

Electrically conductive composite material  

DOE Patents (OSTI)

An electrically conductive composite material is disclosed which comprises a conductive open-celled, low density, microcellular carbon foam filled with a non-conductive polymer or resin. The composite material is prepared in a two-step process consisting of first preparing the microcellular carbon foam from a carbonizable polymer or copolymer using a phase separation process, then filling the carbon foam with the desired non-conductive polymer or resin. The electrically conductive composites of the present invention has a uniform and consistent pattern of filler distribution, and as a result is superior over prior art materials when used in battery components, electrodes, and the like. 2 figs.

Clough, R.L.; Sylwester, A.P.

1989-05-23T23:59:59.000Z

280

Studies on the dynamics of limited filaments  

E-Print Network (OSTI)

A study on the dynamics of filaments in the presence of a diagnostic, conductive limiter is presented. Plasma filaments are coherent structures present in many fusion devices and transport a significant amount of particles ...

Bonde, Jeffrey David

2010-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


281

CONDUCT OF OPERATIONS (CO)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CONDUCT OF OPERATIONS (CO) CONDUCT OF OPERATIONS (CO) OBJECTIVE TA-55 SST Facility NNSA ORR Implementation Plan 1 1 CO.1 The formality and discipline of operations is adequate to conduct work safely and programs are inplace to maintain this formality and discipline. (Core Requirement 13) Criteria 1. Programmatic elements of conduct of operations are in place for TA-55 SST operations. 2. The TA-55 SST operations personnel adequately demonstrate the principles of conduct ofoperations requirements during the shift performance period. Approach Record Reviews: Review procedures and other facility documents to verify compliance with conduct of operations principles. Interviews: Interview a sampling of the TA-55 SST associated personnel to validate their understanding of the conduct of operations principles (e.g., procedure usage,

282

Chemical characterization of ozone formation in the Houston-Galveston area: A chemical transport model study  

E-Print Network (OSTI)

: Constituent sources and sinks; 0345 Atmospheric Composition and Structure: Pollution--urban and regional (0305 of the atmosphere and hence the lifetime of reactive atmospheric pollutants and many re- duced chemical species. O3 model study Wenfang Lei1 and Renyi Zhang Department of Atmospheric Sciences, Texas A&M University

283

This is the user's manual for DEGAS 2 -A Monte Carlo code for the study of neutral atom and molecular transport in confined plasmas. It is intended to cover  

E-Print Network (OSTI)

. The theory of neutral particle kinetics[1] treats the transport of mass, momen- tum, and energy in a plasma;Monte Carlo neutral transport codes can build on the techniques developed for neutron transportAbstract This is the user's manual for DEGAS 2 - A Monte Carlo code for the study of neutral atom

Karney, Charles

284

A Study of Saturated Granular Assemblages and its Implications for Transport, Stress Propagation and Failure in Marine Sediments  

E-Print Network (OSTI)

1964. Mass transport of sediment in the heads of ScrippsCalifornia: implications for sediment provenance. Thesis (M.1976. The unconsolidated sediment distribution on the San

Le Dantec, Nicolas

2009-01-01T23:59:59.000Z

285

A study of saturated granular assemblages and its implications for transport, stress propagation and failure in marine sediments  

E-Print Network (OSTI)

1964. Mass transport of sediment in the heads of ScrippsCalifornia: implications for sediment provenance. Thesis (M.1976. The unconsolidated sediment distribution on the San

Le Dantec, Nicolas

2009-01-01T23:59:59.000Z

286

22nd Annual Transportation Research Conference  

E-Print Network (OSTI)

22nd Annual Transportation Research Conference May 24-25, 2011 Crowne Plaza St. Paul Riverfront for Transportation Studies 22nd Annual Transportation Research Conference Welcome to the Conference The University of Minnesota's Center for Transportation Studies is pleased to present its 22nd Annual Transportation Research

Minnesota, University of

287

Laser Ablation Synthesis and Electron Transport Studies of Tin Oxide Nanowires**  

E-Print Network (OSTI)

and solar cells.[7±9] In addition, SnO2 thin films have been extensively studied and used as chemical demonstrated to work as sensitive UV and polarized UV detectors. A quartz tube furnace was used for our SnO2 of the furnace, and Si±SiO2 sub- strates covered with 20 nm gold catalytic clusters were placed in the middle

Zhou, Chongwu

288

A Comparative Study on AC Conductivity and Dielectric Behavior of Multiwalled Carbon Nanotubes and Polyaniline Coated Multiwalled Carbon Nanotubes Filled High Density Polyethylene-Carbon Black Nanocomposites  

SciTech Connect

This paper presents an experimental investigation on AC conductivity and dielectric behavior of carbon black reinforced high density polyethylene (HDPE-CB) and HDPE-CB filled with multiwalled carbon nanotubes (MWNTs-CB-HDPE) and Polyaniline (PAni) coated MWNTs-CB-HDPE nanocomposites. The electrical properties such as dielectric constant ({epsilon}'), dissipation factor (tan {delta}) and AC conductivity ({sigma}{sub ac}) of nanocomposites have been measured with reference to the weight fraction (0.5 and 1 wt% MWNTs), frequency (75 KHz-30 MHz), temperature (25-90 deg. C) and sea water ageing. The experimental results showed that the increased AC conductivity and dielectric constant of the nanocomposites were influenced by PAni coated MWNTs in HDPE-CB nanocomposites. The value of dielectric constant and tan {delta} decreased with increasing frequency. Further more, above 5 MHz the AC conductivity increases drastically whereas significant effect on tan {delta} was observed in less than 1 MHz.

Dinesh, P. [Department of Electronics and Communication, Nagarjuna College of Engineering and Technology, Bangalore-562 110 Karnataka (India); Department of Electronics and Communication, Sri Jayachamarajendra College of Engineering, Mysore-570 006, Karnataka (India); Renukappa, N. M. [Department of Electronics and Communication, Sri Jayachamarajendra College of Engineering, Mysore-570 006, Karnataka (India); Siddaramaiah [Department of Polymer Science and Technology, Sri Jayachamarajendra College of Engineering, Mysore-570 006, Karnataka (India); Lee, J. H. [School of Advanced Materials Engineering, Chonbuk National University, Jeonbuk 561 756 (Korea, Republic of); Jeevananda, T. [R and D Centre, Department of Chemistry, R.N.S. Institute of Technology, Bangalore-560 061, Karnataka (India)

2010-10-04T23:59:59.000Z

289

ETHICAL CONDUCT IN BIOMEDICAL RESEARCH  

E-Print Network (OSTI)

ETHICAL CONDUCT IN BIOMEDICAL RESEARCH: A Handbook for Biomedical Graduate Studies Students and Research Fellows Third Edition BIOMEDICAL GRADUATE STUDIES PROGRAM UNIVERSITY of PENNSYLVANIA #12 that a trainee in biomedical research should be taught to maintain the highest standards of scientific integrity

Plotkin, Joshua B.

290

Proton conducting ceramic membranes for hydrogen separation  

DOE Patents (OSTI)

A multi-phase proton conducting material comprising a proton-conducting ceramic phase and a stabilizing ceramic phase. Under the presence of a partial pressure gradient of hydrogen across the membrane or under the influence of an electrical potential, a membrane fabricated with this material selectively transports hydrogen ions through the proton conducting phase, which results in ultrahigh purity hydrogen permeation through the membrane. The stabilizing ceramic phase may be substantially structurally and chemically identical to at least one product of a reaction between the proton conducting phase and at least one expected gas under operating conditions of a membrane fabricated using the material. In a barium cerate-based proton conducting membrane, one stabilizing phase is ceria.

Elangovan, S. (South Jordan, UT); Nair, Balakrishnan G. (Sandy, UT); Small, Troy (Midvale, UT); Heck, Brian (Salt Lake City, UT)

2011-09-06T23:59:59.000Z

291

The Organic Chemistry of Conducting Polymers  

SciTech Connect

For the last several years, we have examined the fundamental principles of conduction in one-dimensional systems, i.e., molecular wires. It is, of course, widely recognized that such systems, as components of electronically conductive materials, function in a two- and three-dimensional milieu. Thus interchain hopping and grain-boundary resistivity are limiting conductivity factors in highly conductive materials, and overall conductivity is a function of through-chain and boundary hopping. We have given considerable attention to the basic principles underlying charge transport (the rules of the game) in two-dimensional systems by using model systems which allow direct observation of such processes, including the examination of tunneling and hopping as components of charge transfer. In related work, we have spent considerable effort on the chemistry of conjugated heteropolymers, most especially polythiophens, with the aim of using these most efficient of readily available electroactive polymers in photovoltaic devices.

Tolbert, Laren Malcolm [Georgia Institute of Technology

2014-12-01T23:59:59.000Z

292

Transport anisotropy of the pnictides studied via Monte Carlo simulations of the Spin-Fermion model  

SciTech Connect

An undoped three-orbital spin-fermion model for the Fe-based superconductors is studied via Monte Carlo techniques in two-dimensional clusters. At low temperatures, the magnetic and one-particle spectral properties are in agreement with neutron and photoemission experiments. Our main results are the resistance versus temperature curves that display the same features observed in BaFe{sub 2}As{sub 2} detwinned single crystals (under uniaxial stress), including a low-temperature anisotropy between the two directions followed by a peak at the magnetic ordering temperature, that qualitatively appears related to short-range spin order and concomitant Fermi surface orbital order.

Liang, Shuhua [ORNL; Alvarez, Gonzalo [ORNL; Sen, Cengiz [ORNL; Moreo, Adriana [ORNL; Dagotto, Elbio R [ORNL

2012-01-01T23:59:59.000Z

293

Surface states and conductivity of silicon nano-wires  

Science Journals Connector (OSTI)

The transport characteristics of low dimensional semiconductors like silicon nano-wires (SiNWs) rarely conform to expectations from geometry and dopant density exhibiting significant variations as a function of different surface terminations/conditions. The association of these mechanisms with surface states and their exact influence on practical SiNW devices still remains largely unclear. Herein we report on the influence of surface state charge distributions on SiNW transport characteristics. For this study p-type SiNW devices with widths of 50 100 and 2000?nm are fabricated from 25 50 and 200?nm-thick SOI wafers. A ?five order difference in effective carrier concentration was observed in the initial SiNWs characteristics when comparing SiNWs fabricated with and without a thermal oxide. The removal of the surface oxide by a hydrogen fluoride (HF) treatment results in a SiNW conductance drop up to ?six orders of magnitude. This effect is from a surface depletion of holes in the SiNW induced by positive surface charges deposited as a result of the HF treatment. However it is observed that this charge density is transient and is dissipated with the re-growth of an oxide layer. In summary the SiNW conductance is shown to vary by several orders of magnitude while comparing its characteristics for the three most studied surface conditions: with a native oxide thermal oxide and HF induced H-terminations. These results emphasize the necessity to interpret the transport characteristics of SiNWs with respect to its surface condition during future investigations pertaining to the physical properties of SiNWs like its piezo-resistance. As a sequel prospects for efficiently sensing an elementary reduction/oxidation chemical process by monitoring the variation of SiNW surface potential or in practice the SiNW conductance is demonstrated.

Thomas Pardoen; Jean-Pierre Raskin

2013-01-01T23:59:59.000Z

294

High conductance surge cable  

DOE Patents (OSTI)

An electrical cable for connecting transient voltage surge suppressors to electrical power panels. A strip of electrically conductive foil defines a longitudinal axis, with a length of an electrical conductor electrically attached to the metallic foil along the longitudinal axis. The strip of electrically conductive foil and the length of an electrical conductor are covered by an insulating material. For impedance matching purposes, triangular sections can be removed from the ends of the electrically conductive foil at the time of installation. 6 figs.

Murray, M.M.; Wilfong, D.H.; Lomax, R.E.

1998-12-08T23:59:59.000Z

295

High conductance surge cable  

DOE Patents (OSTI)

An electrical cable for connecting transient voltage surge suppressers to ectrical power panels. A strip of electrically conductive foil defines a longitudinal axis, with a length of an electrical conductor electrically attached to the metallic foil along the longitudinal axis. The strip of electrically conductive foil and the length of an electrical conductor are covered by an insulating material. For impedance matching purposes, triangular sections can be removed from the ends of the electrically conductive foil at the time of installation.

Murray, Matthew M. (Espanola, NM); Wilfong, Dennis H. (Brooksville, FL); Lomax, Ralph E. (Santa Fe, NM)

1998-01-01T23:59:59.000Z

296

Research Conduct Policies  

Office of Science (SC) Website

Research Conduct Policies Basic Energy Sciences (BES) BES Home About Research Materials Sciences & Engineering (MSE) Chemical Sciences, Geosciences, and Biosciences (CSGB)...

297

Federal Register Notice: Plan for Conduct of 2012 Electric Transmissio...  

Energy Savers (EERE)

Federal Register Notice: Plan for Conduct of 2012 Electric Transmission Congestion Study Federal Register Notice: Plan for Conduct of 2012 Electric Transmission Congestion Study...

298

Lipid-Based Nanodiscs as Models for Studying Mesoscale Coalescence A Transport Limited Case  

SciTech Connect

Lipid-based nanodiscs (bicelles) are able to form in mixtures of long- and short-chain lipids. Initially, they are of uniform size but grow upon dilution. Previously, nanodisc growth kinetics have been studied using time-resolved small angle neutron scattering (SANS), a technique which is not well suited for probing their change in size immediately after dilution. To address this, we have used dynamic light scattering (DLS), a technique which permits the collection of useful data in a short span of time after dilution of the system. The DLS data indicate that the negatively charged lipids in nanodiscs play a significant role in disc stability and growth. Specifically, the charged lipids are most likely drawn out from the nanodiscs into solution, thereby reducing interparticle repulsion and enabling the discs to grow. We describe a population balance model, which takes into account Coulombic interactions and adequately predicts the initial growth of nanodiscs with a single parameter i.e., surface potential. The results presented here strongly support the notion that the disc coalescence rate strongly depends on nanoparticle charge density. The present system containing low-polydispersity lipid nanodiscs serves as a good model for understanding how charged discoidal micelles coalesce.

Hu, Andrew [University of Connecticut, Storrs; Fan, Tai-Hsi [University of Connecticut, Storrs; Katsaras, John [ORNL; Xia, Yan [University of Connecticut, Storrs; Li, Ming [University of Connecticut, Storrs; Nieh, Mu-Ping [University of Connecticut, Storrs

2014-01-01T23:59:59.000Z

299

Horizontal coring using air as the circulating fluid: Some prototype studies conducted in G Tunnel at the Nevada Test Site for the Yucca Mountain Project  

SciTech Connect

Horizontal coring using air as the circulating fluid has been conducted in the G Tunnel Underground Facility (GTUF) at the Nevada Test Site. This work is part of the prototype investigations of hydrogeology for the Yucca Mountain Project. The work is being conducted to develop methods and procedures that will be used at the Department of Energy`s Yucca Mountain Site, a candidate site for the nation`s first high-level nuclear waste repository, during the site characterization phase of the investigations. The United States Geological Survey (USGS) is conducting this prototype testing under the guidance of the Los Alamos National Laboratory (LANL) and in conjunction with Reynolds Electrical & Engineering Company (REECo), the drilling contractor. 7 refs., 8 figs., 5 tabs.

Chornack, M.P. [Geological Survey, Las Vegas, NV (USA); French, C.A. [Reynolds Electrical and Engineering Co., Inc., Las Vegas, NV (USA)

1989-12-31T23:59:59.000Z

300

The Transport Properties of Activated Carbon Fibers  

DOE R&D Accomplishments (OSTI)

The transport properties of activated isotropic pitch-based carbon fibers with surface area 1000 m{sup 2}/g have been investigated. We report preliminary results on the electrical conductivity, the magnetoresistance, the thermal conductivity and the thermopower of these fibers as a function of temperature. Comparisons are made to transport properties of other disordered carbons.

di Vittorio, S. L.; Dresselhaus, M. S.; Endo, M.; Issi, J-P.; Piraux, L.

1990-07-00T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


301

Temperature dependence of structural parameters in oxide-ion-conducting Nd{sub 9.33}(SiO{sub 4}){sub 6}O{sub 2}: single crystal X-ray studies from 295 to 900K  

SciTech Connect

Crystallographic space group, structural parameters and their thermal changes in oxide-ion-conducting Nd{sub 9.33}(SiO{sub 4}){sub 6}O{sub 2} were investigated using high-temperature single-crystal X-ray diffraction experiments in the temperature range of 295=conductivity. Virtually full occupation of the 6h Nd site and highly anisotropic displacements of oxide ion inside the hexagonal channel were maintained over the temperature range examined. This result confirms that oxide-ion transport inside the hexagonal channel is the dominant process of conduction in the title compound.

Okudera, Hiroki [Max-Planck-Institut fuer Festkoerperforschung, Heisenbergstrasse 1, DE-70569 Stuttgart (Germany)]. E-mail: h.okudera@fkf.mpg.de; Yoshiasa, Akira [Department of Earth and Space Science, Graduate School of Science, Osaka University, 1-1 Machikaneyama-cho, Toyonaka, Osaka 560-0043 (Japan); Masubuchi, Yuuji [Material Science and Engineering, Graduate School of Engineering, Hokkaido University, N13, W8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan); Higuchi, Mikio [Material Science and Engineering, Graduate School of Engineering, Hokkaido University, N13, W8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan); Kikkawa, Shinichi [Material Science and Engineering, Graduate School of Engineering, Hokkaido University, N13, W8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan)

2004-12-01T23:59:59.000Z

302

Horizontal coring using air as the circulating fluid; Some prototype studies conducted in G Tunnel at the Nevada Test Site for the Yucca Mountain Project  

SciTech Connect

This paper reports on horizontal coring using air as the circulating fluid conducted in the G Tunnel Underground Facility (GTUF) at the Nevada Test Site. This work is part of the prototype investigations of hydrogeology for the Yucca Mountain Project. The work is being conducted to develop methods and procedures that will be used at the Department of Energy`s Yucca Mountain Site, a candidate site for the nation`s first high-level nuclear waste repository, during the site characterization phase of the investigations.

French, C.A. [Reynolds Electrical and Engineering Co., Las Vegas, NV (US)

1990-08-01T23:59:59.000Z

303

Mobility 2035 Metropolitan Transportation Plan  

E-Print Network (OSTI)

capacity controlled access facilities (as directed in Texas Transportation Commission Minute Order 109519), KTUTS supports that ?TXDOT explore all funding mechanisms to expedite regional transportation goals, including the use of toll feasibility studies..., efficiency, environmental stewardship, and environmental streamlining. Chapter 2: Demographics SOCIO-ECONOMIC CHARACTERISTICS (CURRENT) The Killeen ? Temple Urban Transportation Study (K-TUTS) has experienced tremendous growth over...

Killeen-Temple Urban Transportation Study

2009-05-20T23:59:59.000Z

304

Asymptotic analysis of extreme electrochemical transport  

E-Print Network (OSTI)

In the study of electrochemical transport processes, experimental exploration currently outpaces theoretical understanding of new phenomena. Classical electrochemical transport theory is not equipped to explain the behavior ...

Chu, Kevin Taylor

2005-01-01T23:59:59.000Z

305

GIZ Transport & Mobility Compass | Open Energy Information  

Open Energy Info (EERE)

Region(s): Global Related Tools Promoting Clean Cars: Case Study of Stockholm and Sweden Technology Roadmap: Biofuels for Transport Navigating Transport NAMAs ... further results...

306

Momentum dissipation and effective theories of coherent and incoherent transport  

E-Print Network (OSTI)

We study heat transport in two systems without momentum conservation: a hydrodynamic system, and a holographic system with spatially dependent, massless scalar fields. When momentum dissipates slowly, there is a well-defined, coherent collective excitation in the AC heat conductivity, and a crossover between sound-like and diffusive transport at small and large distance scales. When momentum dissipates quickly, there is no such excitation in the incoherent AC heat conductivity, and diffusion dominates at all distance scales. For a critical value of the momentum dissipation rate, we compute exact expressions for the Green's functions of our holographic system due to an emergent gravitational self-duality, similar to electric/magnetic duality, and SL(2,R) symmetries. We extend the coherent/incoherent classification to examples of charge transport in other holographic systems: probe brane theories and neutral theories with non-Maxwell actions.

Richard A. Davison; Blaise Goutraux

2015-01-21T23:59:59.000Z

307

10 - Electronic transport in bilayer graphene  

Science Journals Connector (OSTI)

Abstract: Electronic transport in bilayer graphene is studied in this chapter and the fundamental physics and conceptual issues are described. A model Hamiltonian system is described and the method for inducing an energy band gap in the system. The transport properties investigated include conductance in a pn junction, the self-consistent Born approximation and RKKY (RudermanKittelKasuyaYosida) interactions in biased bilayer graphene. Studies on suspended bilayer graphene and on new-generation bilayer graphene samples on SiC are described and the role of many-body effects in these systems is explored. The collective modes in the symmetry and asymmetry charge density channels are discussed and use of the effective mass as an essential quantity in quasiparticle theories is examined. The charge compressibility in bilayer graphene is studied in depth.

R. Asgari

2014-01-01T23:59:59.000Z

308

Effect of HSV-2 serostatus on the acquisition of HIV by young men: results of a longitudinal study conducted in Orange Farm (South Africa)  

E-Print Network (OSTI)

conducted in Orange Farm (South Africa) Joelle Sobngwi - Tambekou jtambekou@yahoo.fr INSERM U687, Villejuif, France Dirk Taljaard dirk@progressus.co.za Progressus, Johannesburg, South Africa Pascale Lissouba, South Africa Emmanuel Lagarde emmanuel.lagarde@isped.u- bordeaux2.fr INSERM U593, Bordeaux, France

Paris-Sud XI, Université de

309

Transport energy consumption in mountainous roads. A comparative case study for internal combustion engines and electric vehicles in Andorra  

Science Journals Connector (OSTI)

Abstract This paper analyses transport energy consumption of conventional and electric vehicles in mountainous roads. A standard round trip in Andorra has been modelled in order to characterise vehicle dynamics in hilly regions. Two conventional diesel vehicles and their electric-equivalent models have been simulated and their performances have been compared. Six scenarios have been simulated to study the effects of factors such as orography, traffic congestion and driving style. The European fuel consumption and emissions test and Artemis urban driving cycles, representative of European driving cycles, have also been included in the comparative analysis. The results show that road grade has a major impact on fuel economy, although it affects consumption in different levels depending on the technology analysed. Electric vehicles are less affected by this factor as opposed to conventional vehicles, increasing the potential energy savings in a hypothetical electrification of the car fleet. However, electric vehicle range in mountainous terrains is lower compared to that estimated by manufacturers, a fact that could adversely affect a massive adoption of electric cars in the short term.

Oriol Travesset-Baro; Marti Rosas-Casals; Eric Jover

2015-01-01T23:59:59.000Z

310

Parallel transport studies of high-Z impurities in the core of Alcator C-Mod plasmas  

SciTech Connect

Measurements of poloidal variation, {sub z}/, in high-Z impurity density have been made using photodiode arrays sensitive to vacuum ultraviolet and soft x-ray emission in Alcator C-Mod plasmas. In/out asymmetries in the range of ?0.2<0.3 are observed for r/a<0.8, and accumulation on both the high-field side, n{sub z,cos}<0, and low-field side, n{sub z,cos}>0, of a flux surface is found to be well described by a combination of centrifugal, poloidal electric field, and ion-impurity friction effects. Up/down asymmetries, ?0.05<0.10, are observed over 0.50 corresponding to accumulation opposite the ion ?B drift direction. Measurements of the up/down asymmetry of molybdenum are found to disagree with predictions from recent neoclassical theory in the trace limit, n{sub z}Z{sup 2}/n{sub i}?1. Non-trace levels of impurities are expected to modify the main-ion poloidal flow and thus change friction-driven impurity density asymmetries and impurity poloidal rotation, v{sub ?,z}. Artificially modifying main-ion flow in parallel transport simulations is shown to impact both {sub z}/ and v{sub ?,z}, but simultaneous agreement between measured and predicted up/down and in/out asymmetry as well as impurity poloidal rotation is not possible for these C-Mod data. This link between poloidal flow and poloidal impurity density variation outlines a more stringent test for parallel neoclassical transport theory than has previously been performed. Measurement and computational techniques specific to the study of poloidal impurity asymmetry physics are discussed as well.

Reinke, M. L.; Hutchinson, I. H.; Rice, J. E.; Greenwald, M.; Howard, N. T.; Hubbard, A.; Hughes, J. W.; Terry, J. L.; Wolfe, S. M. [MIT-Plasma Science and Fusion Center Cambridge, Massachusetts 02139 (United States)] [MIT-Plasma Science and Fusion Center Cambridge, Massachusetts 02139 (United States)

2013-05-15T23:59:59.000Z

311

Study to determine the nature and extent of ozone and ozone precursor transport in selected areas of California. Final report  

SciTech Connect

The project was designed to assess the contribution of transported pollutants to violations of the state ozone standard within the air basins covered by the report using existing data and advanced data analysis techniques. The objectives of the project were to determine the characteristics of ozone and ozone precursor transport within the California air basins covered by the report and to identify whether the contribution of transported pollutants to ozone violations in each downwind area was inconsequential, significant, or overwhelming, relative to locally-emitted pollutants. The precursor pollutants of interest were nitrogen oxides and reactive organic gases. The project evaluated transport to the following areas: The Broader Sacramento Area and the Upper Sacramento Valley; The North Central Coast Air Basin; The Southeast Desert Air Basin (SEDAB); and the Imperial County portion of the SEDAB.

Roberts, P.T.; Musarra, S.; Smith, T.B.; Lurmann, F.W.

1992-04-01T23:59:59.000Z

312

Thermal conductance of metal-metal interfaces  

Science Journals Connector (OSTI)

The thermal conductance of interfaces between Al and Cu is measured in the temperature range 78conductance of the as-deposited Al-Cu interface is 4GWm?2K?1 at room temperature, an order-of-magnitude larger than the phonon-mediated thermal conductance of typical metal-dielectric interfaces. The magnitude and the linear temperature dependence of the conductance are described well by a diffuse-mismatch model for electron transport at interfaces.

Bryan C. Gundrum; David G. Cahill; Robert S. Averback

2005-12-30T23:59:59.000Z

313

Recent Approaches to Modeling Transport of Mercury in Surface Water and Groundwater - Case Study in Upper East Fork Poplar Creek, Oak Ridge, TN - 13349  

SciTech Connect

In this case study, groundwater/surface water modeling was used to determine efficacy of stabilization in place with hydrologic isolation for remediation of mercury contaminated areas in the Upper East Fork Poplar Creek (UEFPC) Watershed in Oak Ridge, TN. The modeling simulates the potential for mercury in soil to contaminate groundwater above industrial use risk standards and to contribute to surface water contamination. The modeling approach is unique in that it couples watershed hydrology with the total mercury transport and provides a tool for analysis of changes in mercury load related to daily precipitation, evaporation, and runoff from storms. The model also allows for simulation of colloidal transport of total mercury in surface water. Previous models for the watershed only simulated average yearly conditions and dissolved concentrations that are not sufficient for predicting mercury flux under variable flow conditions that control colloidal transport of mercury in the watershed. The transport of mercury from groundwater to surface water from mercury sources identified from information in the Oak Ridge Environmental Information System was simulated using a watershed scale model calibrated to match observed daily creek flow, total suspended solids and mercury fluxes. Mercury sources at the former Building 81-10 area, where mercury was previously retorted, were modeled using a telescopic refined mesh with boundary conditions extracted from the watershed model. Modeling on a watershed scale indicated that only source excavation for soils/sediment in the vicinity of UEFPC had any effect on mercury flux in surface water. The simulations showed that colloidal transport contributed 85 percent of the total mercury flux leaving the UEFPC watershed under high flow conditions. Simulation of dissolved mercury transport from liquid elemental mercury and adsorbed sources in soil at former Building 81-10 indicated that dissolved concentrations are orders of magnitude below a target industrial groundwater concentration beneath the source and would not influence concentrations in surface water at Station 17. This analysis addressed only shallow concentrations in soil and the shallow groundwater flow path in soil and unconsolidated sediments to UEFPC. Other mercury sources may occur in bedrock and transport though bedrock to UEFPC may contribute to the mercury flux at Station 17. Generally mercury in the source areas adjacent to the stream and in sediment that is eroding can contribute to the flux of mercury in surface water. Because colloidally adsorbed mercury can be transported in surface water, actions that trap colloids and or hydrologically isolate surface water runoff from source areas would reduce the flux of mercury in surface water. Mercury in soil is highly adsorbed and transport in the groundwater system is very limited under porous media conditions. (authors)

Bostick, Kent; Daniel, Anamary [Professional Project Services, Inc., Bethel Valley Road, Oak Ridge, TN, 37922 (United States)] [Professional Project Services, Inc., Bethel Valley Road, Oak Ridge, TN, 37922 (United States); Tachiev, Georgio [Florida International University, Applied Research Center 10555 W. Flagler St., EC 2100 Miami Florida 33174 (United States)] [Florida International University, Applied Research Center 10555 W. Flagler St., EC 2100 Miami Florida 33174 (United States); Malek-Mohammadi, Siamak [Bradley University, 413A Jobst Hall, Preoria, IL 61625 (United States)] [Bradley University, 413A Jobst Hall, Preoria, IL 61625 (United States)

2013-07-01T23:59:59.000Z

314

Continuous time random walk analysis of solute transport in fractured porous media  

SciTech Connect

The objective of this work is to discuss solute transport phenomena in fractured porous media, where the macroscopic transport of contaminants in the highly permeable interconnected fractures can be strongly affected by solute exchange with the porous rock matrix. We are interested in a wide range of rock types, with matrix hydraulic conductivities varying from almost impermeable (e.g., granites) to somewhat permeable (e.g., porous sandstones). In the first case, molecular diffusion is the only transport process causing the transfer of contaminants between the fractures and the matrix blocks. In the second case, additional solute transfer occurs as a result of a combination of advective and dispersive transport mechanisms, with considerable impact on the macroscopic transport behavior. We start our study by conducting numerical tracer experiments employing a discrete (microscopic) representation of fractures and matrix. Using the discrete simulations as a surrogate for the 'correct' transport behavior, we then evaluate the accuracy of macroscopic (continuum) approaches in comparison with the discrete results. However, instead of using dual-continuum models, which are quite often used to account for this type of heterogeneity, we develop a macroscopic model based on the Continuous Time Random Walk (CTRW) framework, which characterizes the interaction between the fractured and porous rock domains by using a probability distribution function of residence times. A parametric study of how CTRW parameters evolve is presented, describing transport as a function of the hydraulic conductivity ratio between fractured and porous domains.

Cortis, Andrea; Cortis, Andrea; Birkholzer, Jens

2008-06-01T23:59:59.000Z

315

Electrically conductive material  

DOE Patents (OSTI)

An electrically conductive material for use in solid oxide fuel cells, electrochemical sensors for combustion exhaust, and various other applications possesses increased fracture toughness over available materials, while affording the same electrical conductivity. One embodiment of the sintered electrically conductive material consists essentially of cubic ZrO.sub.2 as a matrix and 6-19 wt. % monoclinic ZrO.sub.2 formed from particles having an average size equal to or greater than about 0.23 microns. Another embodiment of the electrically conductive material consists essentially at cubic ZrO.sub.2 as a matrix and 10-30 wt. % partially stabilized zirconia (PSZ) formed from particles having an average size of approximately 3 microns.

Singh, Jitendra P. (Bollingbrook, IL); Bosak, Andrea L. (Burnam, IL); McPheeters, Charles C. (Woodridge, IL); Dees, Dennis W. (Woodridge, IL)

1993-01-01T23:59:59.000Z

316

Electrically conductive material  

DOE Patents (OSTI)

An electrically conductive material is described for use in solid oxide fuel cells, electrochemical sensors for combustion exhaust, and various other applications possesses increased fracture toughness over available materials, while affording the same electrical conductivity. One embodiment of the sintered electrically conductive material consists essentially of cubic ZrO[sub 2] as a matrix and 6-19 wt. % monoclinic ZrO[sub 2] formed from particles having an average size equal to or greater than about 0.23 microns. Another embodiment of the electrically conductive material consists essentially at cubic ZrO[sub 2] as a matrix and 10-30 wt. % partially stabilized zirconia (PSZ) formed from particles having an average size of approximately 3 microns. 8 figures.

Singh, J.P.; Bosak, A.L.; McPheeters, C.C.; Dees, D.W.

1993-09-07T23:59:59.000Z

317

Investigation of the effect of gel residue on hydraulic fracture conductivity using dynamic fracture conductivity test  

E-Print Network (OSTI)

The key to producing gas from tight gas reservoirs is to create a long, highly conductive flow path, via the placement of a hydraulic fracture, to stimulate flow from the reservoir to the wellbore. Viscous fluid is used to transport proppant...

Marpaung, Fivman

2009-05-15T23:59:59.000Z

318

Physical properties of Li ion conducting polyphosphazene based polymer electrolytes  

SciTech Connect

We report a systematic study of the transport properties and the underlying physical chemistry of some polyphosphazene (PPhz)-based polymer electrolytes. We synthesized MEEP and variants which employed mixed combinations of different length oxyethylene side-chains. We compare the conductivity and ion-ion interactions in polymer electrolytes obtained with lithium triflate and lithium bis(trifluoromethanesulfonyl)imide (TFSI) salts added to the polymer. The combination of the lithium imide salt and MEEP yields a maximum conductivity of 8 x 10{sup -5} {Omega}{sup -1} cm{sup -1} at room temperature at a salt loading of 8 monomers per lithium. In one of the mixed side-chain variations, a maximum conductivity of 2 x 10{sup -4} {Omega}{sup -1} cm{sup -1} was measured at the same molar ratio. Raman spectral analysis shows some ion aggregation and some polymer - ion interactions in the PPhz-LiTFSI case but much less than observed with Li CF{sub 3}SO{sub 3}. A sharp increase in the Tg as salt is added corresponds to concentrations above which the conductivity significantly decreases and ion associations appear.

Sanderson, S.; Zawodzinski, T.; Hermes, R.; Davey, J.; Dai, Hongli

1996-12-31T23:59:59.000Z

319

Resistivity and induced polarization monitoring of salt transport under natural hydraulic gradients  

SciTech Connect

The authors demonstrate the use of resistivity/induced polarization (IP) monitoring of salt transport under natural hydraulic loads. Electrical monitoring of saline tracer transport during forced injection has been demonstrated previously. Detection of tracer transport under natural hydraulic loading is difficult because neither the hydraulic load nor the tracer resistivity can be controlled. In one study, the authors identify the electrical response to salt transport in a dynamic beach environment. Resistivity/IP imagine resolved the structure of the saltwater-freshwater interface and evidence for tide-induced groundwater transport. Resistivity increases in the near surface and at depth, upbeach of the high-tide mark, accompanied by tidal transgression. They attribute this to desaturation and decreasing salinity in the near surface and to decreasing salinity at depth, despite tidal transgression. Monitoring of groundwater levels indicates a phase lag between the tide level and groundwater level, supporting the electrical data. IP was insensitive to groundwater salinity variation. In a second study, the authors identify the electrical response to recharge-induced salt transport from a road-sale storage facility. Conductivity and IP models for monitoring lines, located on the basis of an EM31 survey, resolved the subsurface salt distribution, IP modeling resolved the sediment-bedrock interface. Modeling of monthly conductivity differences revealed conductivity increases and decreases at the locations of salt contamination, which correlate with the recharge pattern. They attribute near-surface conductivity increases after heavy rainfall to increasing saturation and ion dissolution. Corresponding conductivity decreases at depth are attributed to flushing of the bedrock with freshwater. Essentially, the opposite response was observed during a quiet monitoring period following heavy recharge. Near-surface IP changes are consistent with this interpretation. Salt transport occurring under natural hydraulic conditions was monitored with resistivity imaging. IP improved characterization of the hydrogeologic framework but was of limited value in monitoring salt transport in these environments.

Slater, L.D.; Sandberg, S.K.

2000-04-01T23:59:59.000Z

320

Enhancing Thermal Conductivity and Reducing Friction  

NLE Websites -- All DOE Office Websites (Extended Search)

Laboratory currently has several projects underway to develop advanced fluids, films, coatings, and Laboratory currently has several projects underway to develop advanced fluids, films, coatings, and processes to improve thermal conductivity and reduce friction. These measures are helping to increase energy efficiency for next-generation transportation applications. Superhard and Slick Coating (SSC) Opportunity: Friction, wear, and lubrication strongly affect the energy efficiency, durability, and environmental compatibility of

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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321

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the initial studies on newer compositions and also includes newer approaches to address various materials issues such as in metal-ceramic sealing. The current quarter's research has also focused on developing a comprehensive reliability model for predicting the structural behavior of the membranes in realistic conditions. In parallel to industry provided compositions, models membranes have been evaluated in varying environment. Of importance is the behavior of flaws and generation of new flaws aiding in fracture. Fracture mechanics parameters such as crack tip stresses are generated to characterize the influence of environment. Room temperature slow crack growth studies have also been initiated in industry provided compositions. The electrical conductivity and defect chemistry of an A site deficient compound (La{sub 0.55}Sr{sub 0.35}FeO{sub 3}) was studied. A higher conductivity was observed for La{sub 0.55}Sr{sub 0.35}FeO{sub 3} than that of La{sub 0.60}Sr{sub 0.40}FeO{sub 3} and La{sub 0.80}Sr{sub 0.20}FeO{sub 3}. Defect chemistry analysis showed that it was primarily contributed by a higher carrier concentration in La{sub 0.55}Sr{sub 0.35}FeO{sub 3}. Moreover, the ability for oxygen vacancy generation is much higher in La{sub 0.55}Sr{sub 0.35}FeO{sub 3} as well, which indicates a lower bonding strength between Fe-O and a possible higher catalytic activity for La{sub 0.55}Sr{sub 0.35}FeO{sub 3}. The program continued to investigate the thermodynamic properties (stability and phase separation behavior) and total conductivity of prototype membrane materials. The data are needed together with the kinetic information to develop a complete model for the membrane transport. Previous report listed initial measurements on a sample of La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-x} prepared in-house by Praxair. Subsequently, a second sample of powder from a larger batch of sample were characterized and compared with the results from the previous batch.

S. Bandopadhyay; N. Nagabhushana; Thomas W. Eagar; Harold R. Larson; Raymundo Arroyave; X.-D Zhou; Y.-W. Shin; H.U. Anderson; Nigel Browning; Alan Jacobson; C.A. Mims

2003-11-01T23:59:59.000Z

322

NANO REVIEW Open Access Thermal conductivity and thermal boundary  

E-Print Network (OSTI)

NANO REVIEW Open Access Thermal conductivity and thermal boundary resistance of nanostructures and the thermal transport prop- erties is a key point to design materials with preferred thermal properties with the heat dissipation on them. The influence of the interfacial roughness on the thermal conductivity

Boyer, Edmond

323

Transportation Demand  

Gasoline and Diesel Fuel Update (EIA)

page intentionally left blank page intentionally left blank 69 U.S. Energy Information Administration | Assumptions to the Annual Energy Outlook 2011 Transportation Demand Module The NEMS Transportation Demand Module estimates transportation energy consumption across the nine Census Divisions (see Figure 5) and over ten fuel types. Each fuel type is modeled according to fuel-specific technology attributes applicable by transportation mode. Total transportation energy consumption is the sum of energy use in eight transport modes: light-duty vehicles (cars and light trucks), commercial light trucks (8,501-10,000 lbs gross vehicle weight), freight trucks (>10,000 lbs gross vehicle weight), buses, freight and passenger aircraft, freight and passenger rail, freight shipping, and miscellaneous

324

Previous work conducted in the laboratory demonstrated optimal control of refrigerant flow and airflow for a breadboard CVSHP (Miller 1987a). This previous work was continued in the present study by investigation  

E-Print Network (OSTI)

, and relative humidity on the COP and capacity of the test unit. The refrigerant charge was held constant#12;Previous work conducted in the laboratory demonstrated optimal control of refrigerant flow optimal refrigerant flow and airflow control settings. Previous studies by Tanaka and Yamanaka (1982

Oak Ridge National Laboratory

325

CONDUCTING A RECORDS INVENTORY  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

PROCEDURE FOR CONDUCTING A RECORDS INVENTORY PROCEDURE FOR CONDUCTING A RECORDS INVENTORY Revision 1 10/31/07 Approved by: DOE Records Management Division, IM-23 PROCEDURE FOR CONDUCTING A RECORDS INVENTORY 1. GENERAL. A records inventory is compiling a descriptive list of each record series or system, including the location of the records and any other pertinent data. A records inventory is not a list of each document or each folder. 2. DEFINE THE RECORDS INVENTORY GOAL(S). The goals of a records inventory should be to: a. Gather information for scheduling purposes; b. Prepare for conversion to other media or to identify the volume of classified and/or permanent records in your organization's custody; and c. Identify any existing shortcomings, deficiencies, or problems with

326

WIPP Transportation  

NLE Websites -- All DOE Office Websites (Extended Search)

Transuranic Waste Transportation Container Documents Documents related to transuranic waste containers and packages. CBFO Tribal Program Information about WIPP shipments across...

327

Transportation Security  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Preliminary Draft - For Review Only 1 Transportation Security Draft Annotated Bibliography Review July 2007 Preliminary Draft - For Review Only 2 Work Plan Task * TEC STG Work...

328

Studies of transport of waste radionuclides, through soil at the Maxey Flats, Kentucky, waste-burial site  

SciTech Connect

Two areas at the waste-burial site are being used to study the interaction of soil with liquid waste - one near Trench 19S and the other between an experimental trench and Trench 27. Analyses of soil solutions near Trench 19S indicate that radionuclides have migrated from the waste-burial trench. The observed distribution of radionuclides in that area suggests that /sup 3/H, as tritiated water, has moved the greatest distance. Movement of /sup 137/Cs is essentially nonexistent. The migration of /sup 238/Pu and /sup 60/Co lies between those two extremes. The distance that /sup 3/H has moved, at an approximated depth of 4 m, is about 9 m. Additional porous cup samplers were installed at depths to 8 m to better evaluate the distribution of radionuclides near Trench 19S. Results from soil moisture measurements by R.K. Schulz of the University of California at Berkeley indicate a preferential movement of water into the waste trench through its cap. Our study of the /sup 3/H in surface soils outside the perimeter fence of the burial site suggests that contamination of the near-surface soil water occurs and could be from an airborne source, possible originating from the site evaporator. Another localized source could be associated with underflow from a burial trench that surfaces outside the perimeter fence. The /sup 3/H content in some soil solutions near an experimental trench suggest a preferential movement of water along an interface of an original soil profile and the overlying landfill. If such an interface were to intercept a burial trench and also outcrop off site, it could act as a preferential pathway for transport of radionuclides off site. The nonsorptive behavior of a small fraction of /sup 238/Pu in the Maxey Flats waste was interpreted as having been caused by an organic complex that is very slowly biodegradable. Organic constituents in the Maxey Flats soil, Tilsit Ap, may complex some of the /sup 238/Pu, making it mobile for some period of time.

Fowler, E.B.; Polzer, W.L.; Essington, E.H.

1983-01-01T23:59:59.000Z

329

Nanoscale thermal transport and the thermal conductance of interfaces  

E-Print Network (OSTI)

-8 2008 #12;Er-fiber laser system, UIUC Nov. 2007 #12;Solid-liquid interfaces: Two approaches · Transient-wide: ­ thermal interface materials ­ so-called "nanofluids" (suspensions in liquids) ­ polymer composites absorption depends on temperature of the nanotube · Assume heat capacity is comparable to graphite · Cooling

Braun, Paul

330

Lithium ion conducting electrolytes  

DOE Patents (OSTI)

A liquid, predominantly lithium-conducting, ionic electrolyte is described having exceptionally high conductivity at temperatures of 100 C or lower, including room temperature, and comprising the lithium salts selected from the group consisting of the thiocyanate, iodide, bromide, chloride, perchlorate, acetate, tetrafluoroborate, perfluoromethane sulfonate, perfluoromethane sulfonamide, tetrahaloaluminate, and heptahaloaluminate salts of lithium, with or without a magnesium-salt selected from the group consisting of the perchlorate and acetate salts of magnesium. Certain of the latter embodiments may also contain molecular additives from the group of acetonitrile (CH{sub 3}CN), succinnonitrile (CH{sub 2}CN){sub 2}, and tetraglyme (CH{sub 3}--O--CH{sub 2}--CH{sub 2}--O--){sub 2} (or like solvents) solvated to a Mg{sup +2} cation to lower the freezing point of the electrolyte below room temperature. Other particularly useful embodiments contain up to about 40, but preferably not more than about 25, mol percent of a long chain polyether polymer dissolved in the lithium salts to provide an elastic or rubbery solid electrolyte of high ambient temperature conductivity and exceptional 100 C conductivity. Another embodiment contains up to about but not more than 10 mol percent of a molecular solvent such as acetone. 2 figs.

Angell, C.A.; Liu, C.

1996-04-09T23:59:59.000Z

331

Conduct of Operations  

Directives, Delegations, and Requirements

This Order defines the requirements for establishing and implementing Conduct of Operations Programs at Department of Energy (DOE), including National Nuclear Security Administration (NNSA), facilities and projects. Cancels DOE O 5480.19. Admin Chg 2, dated 12-3-14, cancels Admin Chg 1.

2010-06-29T23:59:59.000Z

332

Direct Internal Reformation and Mass Transport in the Solid Oxide Fuel Cell Anode: A Pore-Scale Lattice Boltzmann Study with Detailed Reaction Kinetics  

SciTech Connect

The solid oxide fuel cell (SOFC) allows the conversion of chemical energy that is stored in a given fuel, including light hydrocarbons, to electrical power. Hydrocarbon fuels, such as methane, are logistically favourable and provide high energy densities. However, the use of these fuels often results in a decreased efficiency and life. An improved understanding of the reactive flow in the SOFC anode can help address these issues. In this study, the transport and heterogeneous internal reformation of a methane based fuel is addressed. The effect of the SOFC anode's complex structure on transport and reactions is shown to exhibit a complicated interplay between the local molar concentrations and the anode structure. Strong coupling between the phenomenological microstructures and local reformation reaction rates are recognised in this study, suggesting the extension to actual microstructures may provide new insights into the reformation processes.

Grew, Kyle N.; Joshi, Abhijit S.; Chiu, W. K. S.

2010-01-01T23:59:59.000Z

333

Lithium Ion Transport Mechanism in Ternary Polymer Electrolyte-Ionic Liquid Mixtures - A Molecular Dynamics Simulation Study  

E-Print Network (OSTI)

The lithium transport mechanism in ternary polymer electrolytes, consisting of PEO/LiTFSI and various fractions of the ionic liquid N-methyl-N-propylpyrrolidinium bis(trifluoromethane)sulfonimide, are investigated by means of MD simulations. This is motivated by recent experimental findings [Passerini et al., Electrochim. Acta 2012, 86, 330-338], which demonstrated that these materials display an enhanced lithium mobility relative to their binary counterpart PEO/LiTFSI. In order to grasp the underlying microscopic scenario giving rise to these observations, we employ an analytical, Rouse-based cation transport model [Maitra at al., PRL 2007, 98, 227802], which has originally been devised for conventional polymer electrolytes. This model describes the cation transport via three different mechanisms, each characterized by an individual time scale. It turns out that also in the ternary electrolytes essentially all lithium ions are coordinated by PEO chains, thus ruling out a transport mechanism enhanced by the presence of ionic-liquid molecules. Rather, the plasticizing effect of the ionic liquid contributes to the increased lithium mobility by enhancing the dynamics of the PEO chains and consequently also the motion of the attached ions. Additional focus is laid on the prediction of lithium diffusion coefficients from the simulation data for various chain lengths and the comparison with experimental data, thus demonstrating the broad applicability of our approach.

Diddo Diddens; Andreas Heuer

2012-11-14T23:59:59.000Z

334

Office of Secure Transportation Activities  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

16th, 2012 16th, 2012 WIPP Knoxville, TN OFFICE OF SECURE TRANSPORTATION Agency Integration Briefing Our Mission To provide safe and secure ground and air transportation of nuclear weapons, nuclear weapons components, and special nuclear materials and conduct other missions supporting the national security of the United States of America. 3 5 OST's Commitment to Transportation Safety and Security Over three decades of safe, secure transport of nuclear weapons and special nuclear material to and from military locations and DOE facilities More than 140 million miles traveled Over three decades and 240,000 flight hours of accident-free flying Professionalism We conduct ourselves and our operations with the highest standards of professionalism and integrity.

335

Transportation Market Distortions  

E-Print Network (OSTI)

of Highways, Volpe National Transportation Systems Center (Evaluating Criticism of Transportation Costing, VictoriaFrom Here: Evaluating Transportation Diversity, Victoria

Litman, Todd

2006-01-01T23:59:59.000Z

336

Cation Defects and Conductivity in Transparent Oxides  

SciTech Connect

High quality doped zinc oxide and mixed transition metal spinel oxide films have been deposited by means of sputter deposition from metal and metal oxide targets, and by spin casting from aqueous or alcoholic precursor solutions. Deposition conditions and post-deposition processing are found to alter cation oxidation states and their distributions in both oxide materials resulting in marked changes to both optical transmission and electrical response. For ZnO, partial reduction of the neat or doped material by hydrogen treatment of the heated film or by electrochemical processing renders the oxide n-type conducting. Continued reduction was found to diminish conductivity. In contrast, oxidation of the infrared transparent p-type spinel conductors typified by NiCo2O4 was found to increase conductivity. The disparate behavior of these two materials is caused in part by the sign of the charge carrier and by the existence of two different charge transport mechanisms that are identified as free carrier conduction and polaron hopping. While much work has been reported concerning structure/property relationships in the free carrier conducting oxides, there is a significantly smaller body of information on transparent polaron conductors. In this paper, we identify key parameters that promote conductivity in mixed metal spinel oxides and compare their behavior with that of the free carrier TCOs.

Exarhos, Gregory J.; Windisch, Charles F.; Ferris, Kim F.; Owings, Robert R.

2007-10-24T23:59:59.000Z

337

Oxygen ion conducting materials  

DOE Patents (OSTI)

An oxygen ion conducting ceramic oxide that has applications in industry including fuel cells, oxygen pumps, oxygen sensors, and separation membranes. The material is based on the idea that substituting a dopant into the host perovskite lattice of (La,Sr)MnO.sub.3 that prefers a coordination number lower than 6 will induce oxygen ion vacancies to form in the lattice. Because the oxygen ion conductivity of (La,Sr)MnO.sub.3 is low over a very large temperature range, the material exhibits a high overpotential when used. The inclusion of oxygen vacancies into the lattice by doping the material has been found to maintain the desirable properties of (La,Sr)MnO.sub.3, while significantly decreasing the experimentally observed overpotential.

Vaughey, John (Elmhurst, IL); Krumpelt, Michael (Naperville, IL); Wang, Xiaoping (Downers Grove, IL); Carter, J. David (Bolingbrook, IL)

2003-01-01T23:59:59.000Z

338

Super ionic conductive glass  

DOE Patents (OSTI)

An ionically conducting glass for use as a solid electrolyte in a power or secondary cell containing an alkali metal-containing anode and a cathode separated by an alkali metal ion conducting glass having an ionic transference number of unity and the general formula: A.sub.1+x D.sub.2-x/3 Si.sub.x P.sub.3-x O.sub.12-2x/3, wherein A is a network modifier for the glass and is an alkali metal of the anode, D is an intermediate for the glass and is selected from the class consisting of Zr, Ti, Ge, Al, Sb, Be, and Zn and X is in the range of from 2.25 to 3.0. Of the alkali metals, Na and Li are preferred and of the intermediate, Zr, Ti and Ge are preferred.

Susman, Sherman (Park Forest, IL); Volin, Kenneth J. (Fort Collins, CO)

1984-01-01T23:59:59.000Z

339

Transport properties of a meson gas  

E-Print Network (OSTI)

We present recent results on a systematic method to calculate transport coefficients for a meson gas (in particular, we analyze a pion gas) at low temperatures in the context of Chiral Perturbation Theory. Our method is based on the study of Feynman diagrams with a power counting which takes into account collisions in the plasma by means of a non-zero particle width. In this way, we obtain results compatible with analysis of Kinetic Theory with just the leading order diagram. We show the behavior with temperature of electrical and thermal conductivities and shear and bulk viscosities, and we discuss the fundamental role played by unitarity. We obtain that bulk viscosity is negligible against shear viscosity near the chiral phase transition. Relations between the different transport coefficients and bounds on them based on different theoretical approximations are also discussed. We also comment on some applications to heavy-ion collisions.

D. Fernandez-Fraile; A. Gomez Nicola

2007-07-09T23:59:59.000Z

340

Conduction cooled tube supports  

DOE Patents (OSTI)

In boilers, process tubes are suspended by means of support studs that are in thermal contact with and attached to the metal roof casing of the boiler and the upper bend portions of the process tubes. The support studs are sufficiently short that when the boiler is in use, the support studs are cooled by conduction of heat to the process tubes and the roof casing thereby maintaining the temperature of the stud so that it does not exceed 1400.degree. F.

Worley, Arthur C. (Mt. Tabor, NJ); Becht, IV, Charles (Morristown, NJ)

1984-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

An improved Monte Carlo study of coherent scattering effects of low energy charged particle transport in Percus-Yevick liquids  

E-Print Network (OSTI)

We generalize a simple Monte Carlo (MC) model for dilute gases to consider the transport behavior of positrons and electrons in Percus-Yevick model liquids under highly non-equilibrium conditions, accounting rigorously for coherent scattering processes. The procedure extends an existing technique [Wojcik and Tachiya, Chem. Phys. Lett. 363, 3--4 (1992)], using the static structure factor to account for the altered anisotropy of coherent scattering in structured material. We identify the effects of the approximation used in the original method, and develop a modified method that does not require that approximation. We also present an enhanced MC technique that has been designed to improve the accuracy and flexibility of simulations in spatially-varying electric fields. All of the results are found to be in excellent agreement with an independent multi-term Boltzmann equation solution, providing benchmarks for future transport models in liquids and structured systems.

Tattersall, W J; Boyle, G J; White, R D

2015-01-01T23:59:59.000Z

342

TRANSPORTATION ENERGY RESEARCH PIER Transportation Research  

E-Print Network (OSTI)

engine and an Eaton Fuller 10speed manual transmission as the study's representative baseline vehicle beginning in 2017 while providing net savings over the life of the vehicle. Also, fuel cost savings far.energy.ca.gov/research/ transportation/ January 2011 Heavy-Duty Vehicle Emissions and Fuel Consumption Improvement Illustration

343

Investigation of the effect of gel residue on hydraulic fracture conductivity using dynamic fracture conductivity test  

E-Print Network (OSTI)

INVESTIGATION OF THE EFFECT OF GEL RESIDUE ON HYDRAULIC FRACTURE CONDUCTIVITY USING DYNAMIC FRACTURE CONDUCTIVITY TEST A Thesis by FIVMAN MARPAUNG Submitted to the Office of Graduate Studies of Texas A&M University in partial... fulfillment of the requirements for the degree of MASTER OF SCIENCE December 2007 Major Subject: Petroleum Engineering INVESTIGATION OF THE EFFECT OF GEL RESIDUE ON HYDRAULIC FRACTURE CONDUCTIVITY USING DYNAMIC FRACTURE CONDUCTIVITY TEST A...

Marpaung, Fivman

2008-10-10T23:59:59.000Z

344

A unified model of electroporation and molecular transport  

E-Print Network (OSTI)

Biological membranes form transient, conductive pores in response to elevated transmembrane voltage, a phenomenon termed electroporation. These pores facilitate electrical and molecular transport across cell membranes that ...

Smith, Kyle Christopher

2011-01-01T23:59:59.000Z

345

Study of Risk Assessment Programs at Federal Agencies and Commercial Industry Related to the Conduct or Regulation of High Hazard Operations  

SciTech Connect

In the Department of Energy (DOE) Implementation Plan (IP) for Defense Nuclear Facilities Safety Board's Recommendation 2009-1, the DOE committed to studying the use of quantitative risk assessment methodologies at government agencies and industry. This study consisted of document reviews and interviews of senior management and risk assessment staff at six organizations. Data were collected and analyzed on risk assessment applications, risk assessment tools, and controls and infrastructure supporting the correct usage of risk assessment and risk management tools. The study found that the agencies were in different degrees of maturity in the use of risk assessment to support the analysis of high hazard operations and to support decisions related to these operations. Agencies did not share a simple, 'one size fits all' approach to tools, controls, and infrastructure needs. The agencies recognized that flexibility was warranted to allow use of risk assessment tools in a manner that is commensurate with the complexity of the application. The study also found that, even with the lack of some data, agencies application of the risk analysis structured approach could provide useful insights such as potential system vulnerabilities. This study, in combination with a companion study of risk assessment programs in the DOE Offices involved in high hazard operations, is being used to determine the nature and type of controls and infrastructure needed to support risk assessments at the DOE.

Bari, R.; Rosenbloom, S.; O'Brien, J.

2011-03-13T23:59:59.000Z

346

Oxygen Transport Membranes  

SciTech Connect

The focus of this research was to develop new membrane materials by synthesizing different compounds and determining their defect structures, crystallographic structures and electrical properties. In addition to measuring electrical conductivity, oxygen vacancy concentration was also evaluated using thermogravimetry, Neutron diffraction and Moessbauer Spectroscopy. The reducing conditions (CO{sub 2}/CO/H{sub 2} gas mixtures with steam) as encountered in a reactor environment can be expected to have significant influence on the mechanical properties of the oxides membranes. Various La based materials with and without Ti were selected as candidate membrane materials for OTM. The maximum electrical conductivity of LSF in air as a function of temperature was achieved at < 600 C and depends on the concentration of Sr (acceptor dopant). Oxygen occupancy in LSF was estimated using Neutron diffractometry and Moessbauer Spectroscopy by measuring magnetic moment changes depending on the Fe{sup 3+} and Fe{sup 4+} ratio. After extensive studies of candidate materials, lanthanum ferrites (LSF and LSFT) were selected as the favored materials for the oxygen transport membrane (OTM). LSF is a very good material for an OTM because of its high electronic and oxygen ionic conductivity if long term stability and mechanical strength are improved. LSFT not only exhibits p-type behavior in the high oxygen activity regime, but also has n-type conduction in reducing atmospheres. Higher concentrations of oxygen vacancies in the low oxygen activity regime may improve the performance of LSFT as an OTM. The hole concentration is related to the difference in the acceptor and donor concentration by the relation p = [Sr'{sub La}]-[Ti{sm_bullet}{sub Fe}]. The chemical formulation predicts that the hole concentration is, p = 0.8-0.45 or 0.35. Experimental measurements indicated that p is about {approx} 0.35. The activation energy of conduction is 0.2 eV which implies that LSCF conducts via the small polaron conduction mechanism. Scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS) were used to develop strategies to detect and characterize vacancy creation, dopant segregations and defect association in the oxygen conducting membrane material. The pO{sub 2} and temperature dependence of the conductivity, non-stoichiometry and thermal-expansion behavior of compositions with increasing complexity of substitution on the perovskite A and B sites were studied. Studies with the perovskite structure show anomalous behavior at low oxygen partial pressures (<10{sup -5} atm). The anomalies are due to non-equilibrium effects and can be avoided by using very strict criteria for the attainment of equilibrium. The slowness of the oxygen equilibration kinetics arises from two different mechanisms. In the first, a two phase region occurs between an oxygen vacancy ordered phase such as brownmillerite SrFeO{sub 2.5} and perovskite SrFeO{sub 3-x}. The slow kinetics is associated with crossing the two phase region. The width of the miscibility gap decreases with increasing temperature and consequently the effect is less pronounced at higher temperature. The preferred kinetic pathway to reduction of perovskite ferrites when the vacancy concentration corresponds to the formation of significant concentrations of Fe{sup 2+} is via the formation of a Ruddlesden-Popper (RP) phases as clearly observed in the case of La{sub 0.5}Sr{sub 0.5}FeO{sub 3-x} where LaSrFeO{sub 4} is found together with Fe. In more complex compositions, such as LSFTO, iron or iron rich phases are observed locally with no evidence for the presence of discrete RP phase. Fracture strength of tubular perovskite membranes was determined in air and in reducing atmospheric conditions. The strength of the membrane decreased with temperature and severity of reducing conditions although the strength distribution (Weibull parameter, m) was relatively unaltered. Surface and volume dominated the fracture origins and the overall fracture was purely transgranular. The dual phas

S. Bandopadhyay

2008-08-30T23:59:59.000Z

347

Self-Assembly and Transport Limitations in Confined Nafion Films  

NLE Websites -- All DOE Office Websites (Extended Search)

Assembly and Transport Limitations in Confined Nafion Films Assembly and Transport Limitations in Confined Nafion Films Title Self-Assembly and Transport Limitations in Confined Nafion Films Publication Type Journal Article Year of Publication 2013 Authors Modestino, Miguel A., Devproshad K. Paul, Shudipto Dishari, Stephanie A. Petrina, Frances I. Allen, Michael A. Hickner, Kunal Karan, Rachel Segalman, and Adam Z. Weber Journal Macromolecules Volume 46 Issue 3 Pagination 867 - 873 Date Published 02/2013 ISSN 0024-9297 Abstract Ion-conducting polymers are important materials for a variety of electrochemical applications. Perfluorinated ionomers, such as Nafion, are the benchmark materials for proton conduction and are widely used in fuel cells and other electrochemical devices including solar-fuel generators, chlor-alkali cells, and redox flow batteries. While the behavior of Nafion in bulk membranes (10 to 100s ?m thick) has been studied extensively, understanding its properties under thin-film confinement is limited. Elucidating the behavior of thin Nafion films is particularly important for the optimization of fuel-cell catalyst layers or vapor-operated solar-fuel generators, where a thin film of ionomer is responsible for the transport of ions to and from the active electrocatalytic centers. Using a combination of transport-property measurements and structural characterization, this work demonstrates that confinement of Nafion in thin films induced thickness-dependent proton conductivity and ionic-domain structure. Confining Nafion films to thicknesses below 50 nm on a silicon substrate results in a loss of microphase separation of the hydrophilic and hydrophobic domains, which drastically increases the material?s water uptake while in turn decreasing its ionic conductivity.

348

Independent Oversight Evaluation, Office of Secure Transportation -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Evaluation, Office of Secure Transportation - Evaluation, Office of Secure Transportation - February 2004 Independent Oversight Evaluation, Office of Secure Transportation - February 2004 February 2004 Evaluation of the Office of Secure Transportation Emergency Management Program The Secretary of Energy's Office of Independent Oversight and Performance Assurance (OA) conducted an inspection of emergency management programs at the National Nuclear Security Administration's (NNSA) Office of Secure Transportation (OST) in October 2003. Inspection activities included the observation of the OST annual emergency exercise and reviews of selected emergency management program elements. The exercise demonstrated that the OST emergency response organization could effectively provide for prompt event categorization, DOE and NNSA

349

Unsaturated flow and transport through a fault embedded in fractured welded tuff  

E-Print Network (OSTI)

at Yucca Mountain, Nevada. This experiment involved the release of $82,000 L of water over a period of 17 at Yucca Mountain is the transport of radio- nuclides through unsaturated fractured rock that lies between-per- meability domains. [3] Field investigations and numerical studies of Yucca Mountain have been conducted over

Hu, Qinhong "Max"

350

Amarillo Metropolitan Transportation Plan 2010-2035  

E-Print Network (OSTI)

of historical data and are listed in Table 3.2. According to the Texas Workforce Commission employment by industry for the Amarillo Panhandle area (from 2000 to 2010) is AMARILLO METROPOLITAN TRANSPORTATION PLAN 2010-2035 15 projected to increase 15... amarillo metropolitan transportation plan 2010-2035 AMARILLO METROPOLITAN TRANSPORTATION PLAN 2010-2035 AMARILLO URBAN TRANSPORTATION STUDY AMARILLO METROPOLITAN...

Amarillo Metropolitan Planning Organization

2009-10-15T23:59:59.000Z

351

Enhanced Thermal Conductivity Oxide Fuels  

SciTech Connect

the purpose of this project was to investigate the feasibility of increasing the thermal conductivity of oxide fuels by adding small fractions of a high conductivity solid phase.

Alvin Solomon; Shripad Revankar; J. Kevin McCoy

2006-01-17T23:59:59.000Z

352

A Simple Audio Conductivity Device  

Science Journals Connector (OSTI)

A Simple Audio Conductivity Device ... To solve these problems, the authors have built a simple audio conductivity device that is very sensitive to current flow. ...

Gregory Berenato; David F. Maynard

1997-04-01T23:59:59.000Z

353

Fast-ignition transport studies: Realistic electron source, integrated particle-in-cell and hydrodynamic modeling, imposed magnetic fields  

SciTech Connect

Transport modeling of idealized, cone-guided fast ignition targets indicates the severe challenge posed by fast-electron source divergence. The hybrid particle-in-cell (PIC) code Zuma is run in tandem with the radiation-hydrodynamics code Hydra to model fast-electron propagation, fuel heating, and thermonuclear burn. The fast electron source is based on a 3D explicit-PIC laser-plasma simulation with the PSC code. This shows a quasi two-temperature energy spectrum and a divergent angle spectrum (average velocity-space polar angle of 52 Degree-Sign ). Transport simulations with the PIC-based divergence do not ignite for >1 MJ of fast-electron energy, for a modest (70 {mu}m) standoff distance from fast-electron injection to the dense fuel. However, artificially collimating the source gives an ignition energy of 132 kJ. To mitigate the divergence, we consider imposed axial magnetic fields. Uniform fields {approx}50 MG are sufficient to recover the artificially collimated ignition energy. Experiments at the Omega laser facility have generated fields of this magnitude by imploding a capsule in seed fields of 50-100 kG. Such imploded fields will likely be more compressed in the transport region than in the laser absorption region. When fast electrons encounter increasing field strength, magnetic mirroring can reflect a substantial fraction of them and reduce coupling to the fuel. A hollow magnetic pipe, which peaks at a finite radius, is presented as one field configuration which circumvents mirroring.

Strozzi, D. J.; Tabak, M.; Larson, D. J.; Divol, L.; Kemp, A. J.; Bellei, C.; Marinak, M. M.; Key, M. H. [Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94550 (United States)

2012-07-15T23:59:59.000Z

354

CO2 maritime transportation  

Science Journals Connector (OSTI)

The objective of this study is to describe the complete transport chain of CO2 between capture and storage including a ship transport. This last one is composed by the following steps: Shore terminal including the liquefaction, temporary storage and CO2 loading. Ship with a capacity of 30,000m3. On or off shore terminal including an unloading system, temporary storage and export towards the final storage. Between all the possible thermodynamic states, the liquid one is most relevant two options are compared in the study (?50C, 7bar) and (?30C, 15bar). The ship has an autonomy of 6 days, is able to cover 1000km with a cargo of 2.5Mt/year. Several scenarios are studied varying the geographical position of the CO2 source, the number of harbours and the way the CO2 is finally stored. Depending on the option, the transport cost varies from 24 to 32/tCO2. This study confirms the conclusion of a previous study supported by ADEME, the cost transport is not negligible regarding the capture one when ships are considered. Transport by ship becomes a more economical option compared with an off shore pipeline when the distance exceeds 350km and with an onshore pipeline when it exceeds 1100km.

Sandrine Decarre; Julien Berthiaud; Nicolas Butin; Jean-Louis Guillaume-Combecave

2010-01-01T23:59:59.000Z

355

Room temperature electron transport properties of single C{sub 60} studied using scanning tunneling microscope and reak junctions.  

SciTech Connect

We report the measurements of the electron transport of an individual C{sub 60} molecule through the combination of two experimental efforts. The nanometer-sized junctions were fabricated using electromigration combined with electron beam lithography and shadow effect evaporation. We performed the scanning tunneling microscopy/spectroscopy measurements of dispersed C{sub 60} molecules which were deposited on a highly ordered pyrolytic graphite substrate. The single electron tunneling through a single C{sub 60} molecule due to the Coulomb blockage effect is observed at room temperature.

Cheng, R.; Carvell, J.; Fradin, F. Y.; Indiana Univ.-Purdue Univ. at Indianapolis

2010-09-15T23:59:59.000Z

356

Oxygen Transport Ceramic Membranes  

SciTech Connect

The present quarterly report describes some of the investigations on the structural properties of dense OTM bars provided by Praxair and studies on newer composition of Ti doped LSF. In this report, in situ neutron diffraction was used to characterize the chemical and structural properties of La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-{delta}} (here after as L2SF55T) specimen, which was subject to measurements of neutron diffraction from room temperature to 900 C. It was found that space group of R3c yielded a better refinement than a cubic structure of Pm3m. Oxygen occupancy was nearly 3 in the region from room temperature to 700 C, above which the occupancy decreased due to oxygen loss. Dense OTM bars provided by Praxair were loaded to fracture at varying stress rates. Studies were done at room temperature in air and at 1000 C in a specified environment to evaluate slow crack growth behavior. The X-Ray data and fracture mechanisms points to non-equilibrium decomposition of the LSFCO OTM membrane. The non-equilibrium conditions could probably be due to the nature of the applied stress field (stressing rates) and leads to transition in crystal structures and increased kinetics of decomposition. The formations of a Brownmillerite or Sr2Fe2O5 type structures, which are orthorhombic are attributed to the ordering of oxygen vacancies. The cubic to orthorhombic transitions leads to 2.6% increase in strains and thus residual stresses generated could influence the fracture behavior of the OTM membrane. Continued investigations on the thermodynamic properties (stability and phase-separation behavior) and total conductivity of prototype membrane materials were carried out. The data are needed together with the kinetic information to develop a complete model for the membrane transport. Previously characterization, stoichiometry and conductivity measurements for samples of La{sub 0.2}Sr{sub 0.8}Fe{sub 0.55}Ti{sub 0.45}O{sub 3-{delta}} were reported. In this report, measurements of the chemical and thermal expansion as a function of temperature and p{sub O2} are described.

S. Bandopadhyay; N. Nagabhushana; X.-D Zhou; Q. Cai; J. Yang; W.B. Yelon; W.J. James; H.U. Anderson; Alan Jacobson; C.A. Mims

2004-05-01T23:59:59.000Z

357

Transport properties of dense fluid mixtures using nonequilibrium molecular dynamics. Final report, September 15, 1987--March 14, 1997  

SciTech Connect

Computer Simulation Studies were carried out using the method of equilibrium and nonequilibrium molecular dynamics (NEMD) to examine a wide range of transport processes in both fluids and fluid mixtures. This included testing a wide range of mixing rules for thermal conductivity and viscosity. In addition a method was developed to calculate the internal rotational contributions to thermal conductivity and the accuracy of current methods for predicting these contributions were examined. These comparisons were then used to suggest possible ways of improving these theories. The method of NEMD was also used to examine the critical enhancements of thermal conductivity. Finally, molecular simulations were carried out to study the various transport coefficients of fluids confined by membranes, as well as important transport processes such as osmosis, and reverse osmosis.

Murad, S.

1997-05-01T23:59:59.000Z

358

Transportation Engineering Graduate Programs Department of Civil & Environmental Engineering  

E-Print Network (OSTI)

Transportation Engineering Graduate Programs Department of Civil & Environmental Engineering Maseeh College of Engineering & Computer Science STUDY TRANSPORTATION ENGINEERING AT Portland, Oregon is famous for its multimodal transportation system. Why not come to Portland State University and study

Bertini, Robert L.

359

Electrical Conductivity of an Anisotropic Quark Gluon Plasma : A Quasiparticle Approach  

E-Print Network (OSTI)

The study of transport coefficients of strongly interacting matter got impetus after the discovery of perfect fluid ever created at ultrarelativistic heavy ion collision experiments. In this article, we have calculated one such coefficient viz. electrical conductivity of the quark gluon plasma (QGP) phase which exhibits a momentum anisotropy. Relativistic Boltzmann's kinetic equation has been solved in the relaxation-time approximation to obtain the electrical conductivity. We have used the quasiparticle description to define the basic properties of QGP. We have compared our model results with the corresponding results obtained in different lattice as well as other model calculations. Furthermore, we extend our model to calculate the electrical conductivity at finite chemical potential.

Srivastava, P K; Patra, Binoy Krishna

2015-01-01T23:59:59.000Z

360

Lateral conduction infrared photodetector  

DOE Patents (OSTI)

A photodetector for detecting infrared light in a wavelength range of 3-25 .mu.m is disclosed. The photodetector has a mesa structure formed from semiconductor layers which include a type-II superlattice formed of alternating layers of InAs and In.sub.xGa.sub.1-xSb with 0.ltoreq.x.ltoreq.0.5. Impurity doped regions are formed on sidewalls of the mesa structure to provide for a lateral conduction of photo-generated carriers which can provide an increased carrier mobility and a reduced surface recombination. An optional bias electrode can be used in the photodetector to control and vary a cut-off wavelength or a depletion width therein. The photodetector can be formed as a single-color or multi-color device, and can also be used to form a focal plane array which is compatible with conventional read-out integrated circuits.

Kim, Jin K. (Albuquerque, NM); Carroll, Malcolm S. (Albuquerque, NM)

2011-09-20T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
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361

Reliability of Transport Properties for Bulk Thermoelectrics  

Energy.gov (U.S. Department of Energy (DOE))

Presents international round-robin study to ensure quality of transport data and figure of merit of thermoelectric materials

362

Colloid Facilitated Transport of Radioactive Cations in the Vadose Zone: Field Experiments Oak Ridge  

SciTech Connect

The overarching goal of this study was to improve understanding of colloid-facilitated transport of radioactive cations through unsaturated soils and sediments. We conducted a suite of laboratory experiments and field experiments on the vadose-zone transport of colloids, organic matter, and associated contaminants of interest to the U.S. Department of Energy (DOE). The laboratory and field experiments, together with transport modeling, were designed to accomplish the following detailed objectives: 1. Evaluation of the relative importance of inorganic colloids and organic matter to the facilitation of radioactive cation transport in the vadose zone; 2. Assessment of the role of adsorption and desorption kinetics in the facilitated transport of radioactive cations in the vadose zone; 3. Examination of the effects of rainfall and infiltration dynamics and in the facilitated transport of radioactive cations through the vadose zone; 4. Exploration of the role of soil heterogeneity and preferential flow paths (e.g., macropores) on the facilitated transport of radioactive cations in the vadose zone; 5. Development of a mathematical model of facilitated transport of contaminants in the vadose zone that accurately incorporates pore-scale and column-scale processes with the practicality of predicting transport with readily available parameters.

James E. Saiers

2012-09-20T23:59:59.000Z

363

Low temperature carrier transport properties in isotopically controlled germanium  

SciTech Connect

Investigations of electronic and optical properties of semiconductors often require specimens with extremely homogeneous dopant distributions and precisely controlled net-carrier concentrations and compensation ratios. The previous difficulties in fabricating such samples are overcome as reported in this thesis by growing high-purity Ge single crystals of controlled {sup 75}Ge and {sup 70}Ge isotopic compositions, and doping these crystals by the neutron transmutation doping (NTD) technique. The resulting net-impurity concentrations and the compensation ratios are precisely determined by the thermal neutron fluence and the [{sup 74}Ge]/[{sup 70}Ge] ratios of the starting Ge materials, respectively. This method also guarantees unprecedented doping uniformity. Using such samples the authors have conducted four types of electron (hole) transport studies probing the nature of (1) free carrier scattering by neutral impurities, (2) free carrier scattering by ionized impurities, (3) low temperature hopping conduction, and (4) free carrier transport in samples close to the metal-insulator transition.

Itoh, K.

1994-12-01T23:59:59.000Z

364

Low Conductivity Thermal Barrier Coatings  

E-Print Network (OSTI)

Low Conductivity Thermal Barrier Coatings A Dissertation Presented to The Faculty of the School conductivity of the coatings. The minimum thermal conductivity occurs at a low rotation rate and is 0.8 W intrinsic thermal conductivity, good phase stability and greater resistance to sintering and CMAS attack

Wadley, Haydn

365

Argonne Transportation 2006 News  

NLE Websites -- All DOE Office Websites (Extended Search)

6 Transportation News & Highlights 6 Transportation News & Highlights Plug-in Hybrid Electric Vehicle Research Capabilities at Argonne National Laboratory and Idaho National Laboratory December 1, 2006 -- The Electric Power Research Institute (EPRI) and Argonne National Laboratory, two of the nation's premier research organizations, have announced a three-year collaborative agreement to conduct detailed analysis of plug-in hybrid electric vehicles (PHEVs) aimed at assessing the commercial feasibility of this technology for the U.S. Department of Energy. (More...) Nanoexa, Decktron to Collaborate with Argonne on Commercialization of Next-Generation Batteries October 11, 2006 -- Nanoexa, a leading nanotechnology-based clean energy company, and Decktron, a lithium battery and display company, have announced a definitive agreement to develop and transfer into commercial use new lithium battery technology originally developed at the U.S. Department of Energy's Argonne National Laboratory. (More...)

366

Isotope Transport and Exchange within the Coso Geothermal System | Open  

Open Energy Info (EERE)

Transport and Exchange within the Coso Geothermal System Transport and Exchange within the Coso Geothermal System Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Proceedings: Isotope Transport and Exchange within the Coso Geothermal System Details Activities (1) Areas (1) Regions (0) Abstract: We are investigating the plumbing of the Coso geothermal system and the nearby Coso Hot Springs using finite element models of single-phase, variable-density fluid flow, conductive- convective heat transfer, fluid-rock isotope exchange, and groundwater residence times. Using detailed seismic reflection data and geologic mapping, we constructed a regional crosssectional model that extends laterally from the Sierra Nevada to Wildhorse Mesa, west of the Argus Range. The base of the model terminates at the brittle-ductile transition zone. A sensitivity study was

367

Human radiation studies: Remembering the early years: Oral history of physician James S. Robertson, M.D., Ph.D., conducted January 20, 1995  

SciTech Connect

This report is a transcript of in interview of Dr. James S. Robertson by representatives of the DOE Office of Human Radiation Experiments. Dr. Robertson was chosen for this interview because of his research at Brookhaven National Laboratory, especially on Boron Neutron Capture Therapy (BNCT); his work at the United States Naval Defense Laboratory; and his work at the Atomic Energy Commission. After a brief biographical sketch Dr. Robertson discusses research on human subjects at Berkeley, his contributions to the beginnings of Neutron Capture Therapy at Brookhaven, his participation with the Brookhaven Human Use Committee, his involvement in the study of the effects of Castle Bravo event on the Marshallese, and his work with the Naval Radiological Defense Laboratory.

NONE

1995-09-01T23:59:59.000Z

368

Oak Ridge Institute for Science and Education: A guide to record series supporting epidemiologic studies conducted for the Department of Energy  

SciTech Connect

This guide describes record series that pertain to epidemiologic and health-related studies at the Center for Epidemiologic Research (CER) of the Oak Ridge Institute for Science and Education (ORISE). These records document the health and safety monitoring of employees and contract employees of the Department of Energy (DOE) and its predecessor organizations, the Manhattan Engineer District (MED), the Atomic Energy Commission (AEC), and the Energy Research and Development Administration (ERDA). History Associates Incorporated (HAI) prepared this guide as part of DOE`s Epidemiologic Records Inventory Project. This introduction briefly describes the Epidemiologic Records Inventory Project, HAI`s role in the project, the history of the DOE and its epidemiologic research program, and the history of the Oak Ridge Reservation and the Oak Ridge Institute for Science and Education. It also furnishes information on the procedures that HAI sued to select, inventory, and describe pertinent records; the methodology used to produce the guide; the arrangement of the record series descriptions; the location of the records; and procedures for accessing records repositories.

NONE

1995-07-17T23:59:59.000Z

369

Sustainable Transportation Planning: Tools for Creating Vibrant, Healthy and Resilient Communities, by Jeffrey Tumlin  

E-Print Network (OSTI)

Bay Area Case Study. Transportation Research Record, 2187,25, 2012 Sustainable Transportation Planning: Tools forsubject of sustainable transportation typically fall into

Piatkowski, Dan

2012-01-01T23:59:59.000Z

370

Report on the research conducted under the funding of the Sloan foundation postdoctoral fellowship in Computational Molecular Biology [Systematic study of protein-protein complexes] Final report  

SciTech Connect

A central question in molecular biology is what structural features are common at protein-protein interfaces and what energetic factors define the affinity and specificity of protein-protein association. Analysis of structural and mutational data on protein-protein interfaces revealed that protein-protein interfaces of different functional classes contain many more energetically important charged and polar residues than was previously thought. Since, in the context of protein folding studies, polar interactions are believed to destabilize the folded proteins, this observation raised the question as to the forces that determine the stability of protein complexes. To investigate this issue in detail, the authors developed a number of partitioning schemes that allowed them to investigate the role of selected residues, ion pairs, and networks of polar interactions in protein-protein association. The methods developed were applied to the analysis of four different protein-protein interfaces: the ribonuclease barnase and its inhibitor barstar, the human growth hormone and its receptor, subtype N9 influenze virus neuraminidase and NC41 antibody, and the Ras Binding Domain of kinase cRaf and a Ras homologue Rap1A. The calculations revealed a surprising variability in how polar interactions affect the stability of different complexes. The finding that positions of charged and polar residues on protein-protein interfaces are optimized with respect to electrostatic interactions suggests that this property can be employed for the discrimination between native conformations and trial complexes generated by a docking algorithm. Analysis indicated the presence of SH2 domains in Janus family of non-receptor protein tyrosine kinases.

Sheinerman, Felix

2001-06-01T23:59:59.000Z

371

Gas sensing properties of magnesium doped SnO{sub 2} thin films in relation to AC conduction  

SciTech Connect

Conducting magnesium doped (0 to 1.5 wt %) tin oxide thin films prepared by Spray Pyrolysis technique achieved detection of 1000 ppm of LPG. The films deposited at 304 C exhibit an enhanced response at an operating temperature of 350 C. The microstructural properties are studied by means of X-ray diffraction. AC conductivity measurements are carried out using precision LCR meter to analyze the parameters that affect the variation in sensing. The results are correlated with compositional parameters and the subsequent modification in the charge transport mechanism facilitating an enhanced LPG sensing action.

Deepa, S.; Skariah, Benoy, E-mail: dr.boben1@gmail.com; Thomas, Boben, E-mail: dr.boben1@gmail.com [Research Centre in Physics, Mar Athanasius College, Kothamangalam P.O., Kerala 686 666 (India); Joseph, Anisha [Dept.of Physics, Holy Grace Academy of Engineering for Women, Mala, Kerala 683 102 (India)

2014-01-28T23:59:59.000Z

372

Neurotransmitter Transporters  

E-Print Network (OSTI)

at specialized synaptic junctions where electrical excitability in the form of an action potential is translated membrane of neurons and glial cells. Transporters harness electrochemical gradients to force the movement.els.net #12;The response produced when a transmitter interacts with its receptors, the synaptic potential

Bergles, Dwight

373

Cryogenic on-chip multiplexer for the study of quantum transport in 256 split-gate devices  

SciTech Connect

We present a multiplexing scheme for the measurement of large numbers of mesoscopic devices in cryogenic systems. The multiplexer is used to contact an array of 256 split gates on a GaAs/AlGaAs heterostructure, in which each split gate can be measured individually. The low-temperature conductance of split-gate devices is governed by quantum mechanics, leading to the appearance of conductance plateaux at intervals of 2e{sup 2}/h. A fabrication-limited yield of 94% is achieved for the array, and a quantum yield is also defined, to account for disorder affecting the quantum behaviour of the devices. The quantum yield rose from 55% to 86% after illuminating the sample, explained by the corresponding increase in carrier density and mobility of the two-dimensional electron gas. The multiplexer is a scalable architecture, and can be extended to other forms of mesoscopic devices. It overcomes previous limits on the number of devices that can be fabricated on a single chip due to the number of electrical contacts available, without the need to alter existing experimental set ups.

Al-Taie, H., E-mail: ha322@cam.ac.uk; Kelly, M. J. [Centre for Advanced Photonics and Electronics, Electrical Engineering Division, Department of Engineering, 9 J. J. Thomson Avenue, University of Cambridge, Cambridge CB3 0FA (United Kingdom) [Centre for Advanced Photonics and Electronics, Electrical Engineering Division, Department of Engineering, 9 J. J. Thomson Avenue, University of Cambridge, Cambridge CB3 0FA (United Kingdom); Cavendish Laboratory, Department of Physics, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom); Smith, L. W.; Xu, B.; Griffiths, J. P.; Beere, H. E.; Jones, G. A. C.; Ritchie, D. A.; Smith, C. G. [Cavendish Laboratory, Department of Physics, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom)] [Cavendish Laboratory, Department of Physics, University of Cambridge, J. J. Thomson Avenue, Cambridge CB3 0HE (United Kingdom); See, P. [National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW (United Kingdom)] [National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW (United Kingdom)

2013-06-17T23:59:59.000Z

374

Theory of ballistic transport through a 3D-1D-3D quantum system  

Science Journals Connector (OSTI)

Ballistic transport through a three-dimensionalone-dimensionalthree-dimensional quantum system has been studied theoretically. Based on an exact quantum-mechanical formulation, the quantization of the conductance in units of 2e2/h of this vertical analog to the split-gate defined quantum channel in a two-dimensional electron gas has been proved. By taking into account the mode degeneracy in the lateral confined quantum pillar, multiple conductance plateaus, i.e., the conductance changes in steps of multiples of 2e2/h, are shown to appear in the quantum system.

Hongqi Xu

1993-09-15T23:59:59.000Z

375

Modeling subsurface contaminant reactions and transport at the watershed scale  

SciTech Connect

The objectives of this research are: (1) to numerically examine the multiscale effects of physical and chemical mass transfer processes on watershed scale, variably saturated subsurface contaminant transport, and (2) to conduct numerical simulations on watershed scale reactive solute transport and evaluate their implications to uncertainty characterization and cost benefit analysis. Concurrent physical and chemical nonequilibrium caused by inter aggregate gradients of pressure head and solute concentration and intra-aggregate geochemical and microbiological processes, respectively, may arise at various scales and flowpaths. To this date, experimental investigations of these complex processes at watershed scale remain a challenge and numerical studies are often needed for guidance of water resources management and decision making. This research integrates the knowledge bases developed during previous experimental and numerical investigations at a proposed waste disposal site at the Oak Ridge National Laboratory to study the concurrent effects of physical and chemical nonequilibrium. Comparison of numerical results with field data indicates that: (1) multiregion, preferential flow and solute transport exist under partially saturated condition and can be confirmed theoretically, and that (2) mass transfer between pore regions is an important process influencing contaminant movement in the subsurface. Simulations of watershed scale, multi species reactive solute transport suggest that dominance of geochemistry and hydrodynamics may occur simultaneously at different locales and influence the movement of one species relative to another. Execution times on the simulations of the reactive solute transport model also indicate that the model is ready to assist the selection of important parameters for site characterization.

Gwo, J.P.; Jardine, P.M.; D`Azevedo, E.F. [Oak Ridge National Lab., TN (United States); Wilson, G.V. [Desert Research Inst., Las Vegas, NV (United States). Water Resources Center

1997-12-01T23:59:59.000Z

376

NREL: Transportation Research - News  

NLE Websites -- All DOE Office Websites (Extended Search)

News NREL provides a number of transportation and hydrogen news sources. Transportation News Find news stories that highlight NREL's transportation research, development, and...

377

Conductive lithium storage electrode  

DOE Patents (OSTI)

A compound comprising a composition A.sub.x(M'.sub.1-aM''.sub.a).sub.y(XD.sub.4).sub.z, A.sub.x(M'.sub.1-aM''.sub.a).sub.y(DXD.sub.4).sub.z, or A.sub.x(M'.sub.1-aM''.sub.a).sub.y(X.sub.2D.sub.7).sub.z, and have values such that x, plus y(1-a) times a formal valence or valences of M', plus ya times a formal valence or valence of M'', is equal to z times a formal valence of the XD.sub.4, X.sub.2D.sub.7, or DXD.sub.4 group; or a compound comprising a composition (A.sub.1-aM''.sub.a).sub.xM'.sub.y(XD.sub.4).sub.z, (A.sub.1-aM''.sub.a).sub.xM'.sub.y(DXD.sub.4).sub.z (A.sub.1-aM''.sub.a).sub.xM'.sub.y(X.sub.2D.sub.7).sub.z and have values such that (1-a).sub.x plus the quantity ax times the formal valence or valences of M'' plus y times the formal valence or valences of M' is equal to z times the formal valence of the XD.sub.4, X.sub.2D.sub.7 or DXD.sub.4 group. In the compound, A is at least one of an alkali metal and hydrogen, M' is a first-row transition metal, X is at least one of phosphorus, sulfur, arsenic, molybdenum, and tungsten, M'' any of a Group IIA, IIIA, IVA, VA, VIA, VIIA, VIIIA, IB, IIB, IIIB, IVB, VB, and VIB metal, D is at least one of oxygen, nitrogen, carbon, or a halogen, 0.0001conductivity at 27.degree. C. of at least about 10.sup.-8 S/cm. The compound can be a doped lithium phosphate that can intercalate lithium or hydrogen. The compound can be used in an electrochemical device including electrodes and storage batteries and can have a gravimetric capacity of at least about 80 mAh/g while being charged/discharged at greater than about C rate of the compound.

Chiang, Yet-Ming (Framingham, MA); Chung, Sung-Yoon (Incheon, KR); Bloking, Jason T. (Mountain View, CA); Andersson, Anna M. (Vasteras, SE)

2012-04-03T23:59:59.000Z

378

Conductive lithium storage electrode  

DOE Patents (OSTI)

A compound comprising a composition A.sub.x(M'.sub.1-aM''.sub.a).sub.y(XD.sub.4).sub.z, A.sub.x(M'.sub.1-aM''.sub.a).sub.y(DXD.sub.4).sub.z, or A.sub.x(M'.sub.1-aM''.sub.a).sub.y(X.sub.2D.sub.7).sub.z, and have values such that x, plus y(1-a) times a formal valence or valences of M', plus ya times a formal valence or valence of M'', is equal to z times a formal valence of the XD.sub.4, X.sub.2D.sub.7, or DXD.sub.4 group; or a compound comprising a composition (A.sub.1-aM''.sub.a).sub.xM'.sub.y(XD.sub.4).sub.z, (A.sub.1-aM''.sub.a).sub.xM'.sub.y(DXD.sub.4).sub.z(A.sub.1-aM''.sub.a).s- ub.xM'.sub.y(X.sub.2D.sub.7).sub.z and have values such that (1-a).sub.x plus the quantity ax times the formal valence or valences of M'' plus y times the formal valence or valences of M' is equal to z times the formal valence of the XD.sub.4, X.sub.2D.sub.7 or DXD.sub.4 group. In the compound, A is at least one of an alkali metal and hydrogen, M' is a first-row transition metal, X is at least one of phosphorus, sulfur, arsenic, molybdenum, and tungsten, M'' any of a Group IIA, IIIA, IVA, VA, VIA, VIIA, VIIIA, IB, IIB, IIIB, IVB, VB, and VIB metal, D is at least one of oxygen, nitrogen, carbon, or a halogen, 0.0001conductivity at 27.degree. C. of at least about 10.sup.-8 S/cm. The compound can be a doped lithium phosphate that can intercalate lithium or hydrogen. The compound can be used in an electrochemical device including electrodes and storage batteries and can have a gravimetric capacity of at least about 80 mAh/g while being charged/discharged at greater than about C rate of the compound.

Chiang, Yet-Ming (Framingham, MA); Chung, Sung-Yoon (Seoul, KR); Bloking, Jason T. (Cambridge, MA); Andersson, Anna M. (Uppsala, SE)

2008-03-18T23:59:59.000Z

379

Generation, storage, collection and transportation of municipal solid waste - A case study in the city of Kathmandu, capital of Nepal  

SciTech Connect

Solid waste management (SWM) services have consistently failed to keep up with the vast amount of solid waste produced in urban areas. There is not currently an efficient system in place for the management, storage, collection, and transportation of solid waste. Kathmandu City, an important urban center of South Asia, is no exception. In Kathmandu Metropolitan City, solid waste generation is predicted to be 1091 m{sup 3}/d (245 tons/day) and 1155 m{sup 3}/d (260 tons/day) for the years 2005 and 2006, respectively. The majority (89%) of households in Kathmandu Metropolitan City are willing to segregate the organic and non-organic portions of their waste. Overall collection efficiency was 94% in 2003. An increase in waste collection occurred due to private sector involvement, the shutdown of the second transfer station near the airport due to local protest, a lack of funding to maintain trucks/equipment, a huge increase in plastic waste, and the willingness of people to separate their waste into separate bins. Despite a substantial increase in total expenditure, no additional investments were made to the existing development plan to introduce a modern disposal system due to insufficient funding. Due to the lack of a proper lining, raw solid waste from the existing dumping site comes in contact with river water directly, causing severe river contamination and deteriorating the quality of the water.

Alam, R. [Shahjalal University of Science and Technology, Department of Civil and Environmental Engineering, Sylhet 3114 (Bangladesh)], E-mail: rakib_env@yahoo.com; Chowdhury, M.A.I.; Hasan, G.M.J.; Karanjit, B.; Shrestha, L.R. [Shahjalal University of Science and Technology, Department of Civil and Environmental Engineering, Sylhet 3114 (Bangladesh)

2008-07-01T23:59:59.000Z

380

Miscible Column Studies of Unfractured and Saturated Cores of Topopah Spring Tuff from Yucca Mountain, Nevada Using Hydrophobic Organic Pollutants.  

E-Print Network (OSTI)

??Miscible displacement column studies were conducted on unfractured cores of Topopah Spring Tuff to quantify transport characteristics of bromide&44; pentafluorobenzoic acid &40;PFBA&41;&44; trichloroethylene &40;TCE&41;&44; and (more)

Kramer, Kody V.

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


381

Spent Fuel Transportation Risk Assessment  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Fuel Transportation Risk Assessment Fuel Transportation Risk Assessment (SFTRA) Draft NUREG-2125 Overview for National Transportation Stakeholders Forum John Cook Division of Spent Fuel Storage and Transportation 1 SFTRA Overview Contents * Project and review teams * Purpose and goals * Basic methodology * Improvements relative to previous studies * Draft NUREG structure and format * Routine shipment analysis and results * Accident condition analysis and results * Findings and conclusions * Schedule 2 SFTRA Research and Review Teams * Sandia National Laboratory Research Team [$1.8M; 9/06-9/12] - Doug Ammerman - principal investigator - Carlos Lopez - thermal - Ruth Weiner - RADTRAN * NRC's SFTRA Technical Review Team - Gordon Bjorkman - structural

382

RESPONSIBLE CONDUCT OF RESEARCH  

E-Print Network (OSTI)

;Case studies in physics ¨ Premature Higgs (2011) ¨ Cold fusion (1989) ¨ Element X (2002) ¨ Schoer (2002 and Fleischmann announce Cold Fusion ¨ Electrolysis of heavy water ¨ Deuterium enters palladium cathode ¨ See temperature rise ¨ Detect fusion products like Helium in water 5/29/12 16 #12;Show the movie ¨ The Believers

Shahriar, Selim

383

How to Conduct an Energy Efficiency Study  

E-Print Network (OSTI)

operating personnel. Development of Energy Efficiency Items are discussed with a description of how to determine capital cost, energy savings, cost savings, and R.O.I. Methods of personnel utilization are discussed which provide greater individual...

Biles, J. E.

1979-01-01T23:59:59.000Z

384

Global Electrical Conductivity Magnetic Satellite Induction Studies  

E-Print Network (OSTI)

-annual Daily variation Solar rotation (27 days) Storm activity Quiet days Schumann resonances Powerline noise

Constable, Steve

385

Transportation Security  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

For Review Only 1 Transportation Security Draft Annotated Bibliography Review July 2007 Preliminary Draft - For Review Only 2 Work Plan Task * TEC STG Work Plan, dated 8/2/06, Product #16, stated: "Develop an annotated bibliography of publicly-available documents related to security of radioactive material transportation." * Earlier this year, a preliminary draft annotated bibliography on this topic was developed by T-REX , UNM, to initially address this STG Work Plan Task. Preliminary Draft - For Review Only 3 Considerations in Determining Release of Information * Some "Publicly-available" documents could potentially contain inappropriate information according to standards set by DOE information security policy and DOE Guides. - Such documents would not be freely

386

Transportation Issues  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Issues Issues and Resolutions - Compilation of Laboratory Transportation Work Package Reports Prepared for U.S. Department of Energy Used Fuel Disposition Campaign Compiled by Paul McConnell Sandia National Laboratories September 30, 2012 FCRD-UFD-2012-000342 Transportation Issues and Resolutions ii September 2012 Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. DISCLAIMER This information was prepared as an account of work sponsored by an agency of the U.S. Government. Neither the U.S. Government nor any

387

Transport coefficients of a hot pion gas  

Science Journals Connector (OSTI)

General expressions for transport coefficients of a single-component gas (namely, thermal conductivity and shear and bulk viscosities) of bosons are derived from a Boltzmann-Uehling-Uhlenbeck transport equation by means of the Chapman-Enskog method to first order. These expressions are then used for the calculation of the associated transport relaxation times and applied to the pion gas produced in ultrarelativistic heavy-ion collisions. The influence of Bose enhancement factors on transport properties can be seen by comparison with previous calculations. 1996 The American Physical Society.

D. Davesne

1996-06-01T23:59:59.000Z

388

Transportation Politics and Policy  

U.S. Energy Information Administration (EIA) Indexed Site

Reducing Greenhouse Reducing Greenhouse Gas Emissions from U.S. Transportation Steven Plotkin, Argonne National Laboratory (co-author is David Greene of Oak Ridge) 2011 EIA Energy Conference May 26-27, 2011 Washington, DC Overview  Presentation based on recent report from the Pew Center on Global Climate Change  Task: Assess the potential to substantially reduce transportation's GHG emissions by 2035 & 2050.  Base Case: Annual Energy Outlook 2010 Reference Case, extended to 2050  Three scenarios with differing assumptions about technological progress, policy initiatives, and public attitudes  Rely on existing studies to estimate impacts  Scenario analysis uses Kaya method to integrate policy impacts and avoid

389

Ionically Conducting Membranes for Hydrogen Production and Separation  

NLE Websites -- All DOE Office Websites (Extended Search)

IONICALLY CONDUCTING MEMBRANES IONICALLY CONDUCTING MEMBRANES FOR HYDROGEN PRODUCTION AND SEPARATION Presented by Tony Sammells Eltron Research Inc. Boulder, Colorado www.eltronresearch.com Presented at DOE Hydrogen Separations Workshop Arlington, Virginia September 8, 2004 ELTRON RESEARCH INC. TO BE DISCUSSED * Membranes for Hydrogen Production - Compositions - Feedstocks - Performance - Key Technical Hurdles * Membranes for Hydrogen Separation - Compositions - Ex Situ vs. In Situ WGS - Performance - Key Technical Hurdles ELTRON RESEARCH INC. OVERALL SCHEME FOR CONVERTING FEEDSTOCK TO HYDROGEN WITH SIMULTANEOUS CARBON DIOXIDE SEQUESTRATION Oxygen Transport Membrane Hydrogen Transport Membrane Natural Gas Coal Biomass Syngas CO/H 2 WGS H 2 O CO 2 /H 2 1618afs.dsf H 2 CO 2 ELTRON RESEARCH INC. INCENTIVES FOR OXYGEN TRANSPORT MEMBRANES FOR

390

Electrical Conductivity of a Dense Plasma  

Science Journals Connector (OSTI)

The ac electrical conductivity of a dense plasma is studied by use of reflectivity measurements on the rear surface of a laser-irradiated planar target. The results show general agreement with theory in which a minimum collision mean free path is assumed, yielding correspondingly a minimum conductivity. However, the results also suggest that the minimum mean free path is greater than the interatomic radius.

A. Ng, D. Parfeniuk, P. Celliers, L. DaSilva, R. M. More, and Y. T. Lee

1986-09-29T23:59:59.000Z

391

Policy Research TRANSPORTATION  

E-Print Network (OSTI)

Policy Research TRANSPORTATION CENTER Thestate's transportation system is central to its ability movement of goods to maintain and enhance global economic competitiveness. An effective transportation, TTI has identified the following set of initial transportation issues which must be better understood

392

Parallel heat transport in integrable and chaotic magnetic fields  

SciTech Connect

The study of transport in magnetized plasmas is a problem of fundamental interest in controlled fusion, space plasmas, and astrophysics research. Three issues make this problem particularly challenging: (i) The extreme anisotropy between the parallel (i.e., along the magnetic field), {chi}{sub ||} , and the perpendicular, {chi}{sub Up-Tack }, conductivities ({chi}{sub ||} /{chi}{sub Up-Tack} may exceed 10{sup 10} in fusion plasmas); (ii) Nonlocal parallel transport in the limit of small collisionality; and (iii) Magnetic field lines chaos which in general complicates (and may preclude) the construction of magnetic field line coordinates. Motivated by these issues, we present a Lagrangian Green's function method to solve the local and non-local parallel transport equation applicable to integrable and chaotic magnetic fields in arbitrary geometry. The method avoids by construction the numerical pollution issues of grid-based algorithms. The potential of the approach is demonstrated with nontrivial applications to integrable (magnetic island), weakly chaotic (Devil's staircase), and fully chaotic magnetic field configurations. For the latter, numerical solutions of the parallel heat transport equation show that the effective radial transport, with local and non-local parallel closures, is non-diffusive, thus casting doubts on the applicability of quasilinear diffusion descriptions. General conditions for the existence of non-diffusive, multivalued flux-gradient relations in the temperature evolution are derived.

Castillo-Negrete, D. del; Chacon, L. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-8071 (United States)

2012-05-15T23:59:59.000Z

393

Parallel heat transport in integrable and chaotic magnetic fields  

SciTech Connect

The study of transport in magnetized plasmas is a problem of fundamental interest in controlled fusion, space plasmas, and astrophysics research. Three issues make this problem particularly chal- lenging: (i) The extreme anisotropy between the parallel (i.e., along the magnetic field), , and the perpendicular, , conductivities ( / may exceed 1010 in fusion plasmas); (ii) Magnetic field lines chaos which in general complicates (and may preclude) the construction of magnetic field line coordinates; and (iii) Nonlocal parallel transport in the limit of small collisionality. Motivated by these issues, we present a Lagrangian Green s function method to solve the local and non-local parallel transport equation applicable to integrable and chaotic magnetic fields in arbitrary geom- etry. The method avoids by construction the numerical pollution issues of grid-based algorithms. The potential of the approach is demonstrated with nontrivial applications to integrable (magnetic island chain), weakly chaotic (devil s staircase), and fully chaotic magnetic field configurations. For the latter, numerical solutions of the parallel heat transport equation show that the effective radial transport, with local and non-local closures, is non-diffusive, thus casting doubts on the appropriateness of the applicability of quasilinear diffusion descriptions. General conditions for the existence of non-diffusive, multivalued flux-gradient relations in the temperature evolution are derived.

Del-Castillo-Negrete, Diego B [ORNL; Chacon, Luis [ORNL

2012-01-01T23:59:59.000Z

394

Polymer Nanofibers with Outstanding Thermal Conductivity and Thermal Stability: Fundamental Linkage between Molecular Characteristics and Macroscopic Thermal Properties  

E-Print Network (OSTI)

Polymer nanofibers with high thermal conductivities and outstanding thermal stabilities are highly desirable in heat transfer-critical applications such as thermal management, heat exchangers and energy storage. In this work, we unlock the fundamental relations between the thermal conductivity and thermal stability of polymer nanofibers and their molecular characteristics by studying the temperature-induced phase transitions and thermal transport of a series of polymer nanofibers. Ten different polymer nanofibers with systematically chosen molecular structures are studied using large scale molecular dynamics simulations. We found that high thermal conductivity and good thermal stability can be achieved in polymers with rigid backbones, exemplified by {\\pi}-conjugated polymers, due to suppressed segmental rotations and large phonon group velocities. The low probability of segmental rotation does not only prevent temperature-induced phase transition but also enables long phonon mean free paths due to reduced di...

Zhang, Teng; Luo, Tengfei

2014-01-01T23:59:59.000Z

395

Comparative analyses of spent nuclear fuel transport modal options: Transport options under existing site constraints  

SciTech Connect

The movement of nuclear waste can be accomplished by various transport modal options involving different types of vehicles, transport casks, transport routes, and intermediate intermodal transfer facilities. A series of systems studies are required to evaluate modal/intermodal spent fuel transportation options in a consistent fashion. This report provides total life-cycle cost and life-cycle dose estimates for a series of transport modal options under existing site constraints. 14 refs., 7 figs., 28 tabs.

Brentlinger, L.A.; Hofmann, P.L.; Peterson, R.W.

1989-08-01T23:59:59.000Z

396

Residence Hall Handbook Policies, Regulations, and Standards of Conduct  

E-Print Network (OSTI)

, educational community does not tolerate physical or psychological threats, harassment, intimidation1 Residence Hall Handbook Policies, Regulations, and Standards of Conduct Updated August 20, 2012 community member who works, lives, studies, teaches, does research, conducts business or is involved

Stowell, Michael

397

Residence Hall Handbook Policies, Regulations, and Standards of Conduct  

E-Print Network (OSTI)

, educational community does not tolerate physical or psychological threats, harassment, intimidation1 Residence Hall Handbook Policies, Regulations, and Standards of Conduct As members community member who works, lives, studies, teaches, does research, conducts business or is involved

Vasilyev, Oleg V.

398

High Seebeck effects from conducting polymer: Poly(3,4-ethylenedioxythiophene): poly(styrenesulfonate) based thin-film device with hybrid metal/polymer/metal architecture  

SciTech Connect

Conductive polymers are of particular interest for thermoelectric applications due to their low thermal conductivity and relatively high electrical conductivity. In this study, commercially available conducting polymer poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) was used in a hybrid metal/polymer/metal thin film design in order to achieve a high Seebeck coefficient with the value of 252lV/k on a relatively low temperature scale. Polymer film thickness was varied in order to investigate its influence on the Seebeck effect. The high Seebeck coefficient indicates that the metal/polymer/metal design can develop a large entropy difference in internal energy of charge carriers between high and low-temperature metal electrodes to develop electrical potential due to charge transport in conducting polymer film through metal/polymer interface. Therefore, the metal/polymer/metal structure presents a new design to combine inorganic metals and organic polymers in thin-film form to develop Seebeck devices

Stanford, Michael G [ORNL; Wang, Hsin [ORNL; Ivanov, Ilia N [ORNL; Hu, Bin [University of Tennessee, Knoxville (UTK)

2012-01-01T23:59:59.000Z

399

Field studies of the potential for wind transport of plutonium- contaminated soils at sites in Areas 6 and 11, Nevada Test Site  

SciTech Connect

This report describes and documents a series of field experiments carried out in Areas 6 and 11 of the Nevada Test Site in June and July 1994 to determine parameters of boundary layer winds, surface characteristics, and vegetation cover that can be used to predict dust emissions from the affected sites. Aerodynamic roughness of natural sites is determined largely by the lateral cover of the larger and more permanent roughness elements (shrubs). These provide a complete protection of the surface from wind erosion. Studies using a field-portable wind tunnel demonstrated that natural surfaces in the investigated areas of the Nevada Test Site are stable except at very high wind speeds (probably higher than normally occur, except perhaps in dust devils). However, disturbance of silty-clay surfaces by excavation devices and vehicles reduces the entrainment threshold by approximately 50% and makes these areas potentially very susceptible to wind erosion and transport of sediments.

Lancaster, N.; Bamford, R.; Metzger, S. [University and Community Coll. System of Nevada, Reno, NV (United States). Quaternary Sciences Center, Desert Research Institute

1995-07-01T23:59:59.000Z

400

Electronic structure and electrical transport in ternary Al-Mg-B films prepared by magnetron sputtering  

SciTech Connect

Nanostructured ternary Al-Mg-B films possess high hardness and corrosion resistance. In the present work, we study their electronic structure and electrical transport. The films exhibit semiconducting characteristics with an indirect optical-bandgap of 0.50 eV, as deduced from the Tauc plots, and a semiconductor behavior with a Fermi level of {approx}0.24 eV below the conduction band. Four-probe and Hall measurements indicated a high electrical conductivity and p-type carrier mobility, suggesting that the electrical transport is mainly due to hole conduction. Their electrical properties are explained in terms of the film nanocomposite microstructure consisting of an amorphous B-rich matrix containing AlMgB{sub 14} nanoparticles.

Yan, C.; Qian, J. C.; He, B.; Ng, T. W.; Zhang, W. J.; Bello, I. [Department of Physics and Center of Super-Diamond and Advanced Films, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Kowloon (Hong Kong)] [Department of Physics and Center of Super-Diamond and Advanced Films, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Kowloon (Hong Kong); Jha, S. K. [Blackett Laboratory, Department of Physics, Imperial College London, London SW72AZ (United Kingdom)] [Blackett Laboratory, Department of Physics, Imperial College London, London SW72AZ (United Kingdom); Zhou, Z. F.; Li, K. Y. [Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Kowloon (Hong Kong)] [Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon Tong, Kowloon (Hong Kong); Klemberg-Sapieha, J. E.; Martinu, L. [Department of Engineering Physics, Ecole Polytechnique de Montreal, Montreal, Quebec H3A 3A7 (Canada)] [Department of Engineering Physics, Ecole Polytechnique de Montreal, Montreal, Quebec H3A 3A7 (Canada)

2013-03-25T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


401

An Empirical Study of Alternative Fuel Vehicle Choice by Commercial Fleets: Lessons in Transportation Choices, and Public Agencies' Organization  

E-Print Network (OSTI)

1990). The Economics of Alternative Fuel Use: SubstitutingAn Empirical Study of Alternative Fuel Vehicle Choice byFleet Demand for Alternative-Fuel Vehicles, with T. Golob,

Crane, Soheila Soltani

1996-01-01T23:59:59.000Z

402

Gas Code of Conduct (Connecticut) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Gas Code of Conduct (Connecticut) Gas Code of Conduct (Connecticut) Gas Code of Conduct (Connecticut) < Back Eligibility Agricultural Commercial Construction Fed. Government Fuel Distributor General Public/Consumer Industrial Installer/Contractor Institutional Investor-Owned Utility Local Government Low-Income Residential Multi-Family Residential Municipal/Public Utility Nonprofit Residential Retail Supplier Rural Electric Cooperative Schools State/Provincial Govt Systems Integrator Transportation Tribal Government Utility Program Info State Connecticut Program Type Safety and Operational Guidelines Provider Public Utilities Regulatory Authority The Gas Code of Conduct sets forth the standard of conduct for transactions, direct or indirect, between gas companies and their affiliates. The purpose of these regulations is to promote competitive

403

EPAct Transportation Regulatory Activities: Key Terms  

NLE Websites -- All DOE Office Websites (Extended Search)

Key Terms Key Terms to someone by E-mail Share EPAct Transportation Regulatory Activities: Key Terms on Facebook Tweet about EPAct Transportation Regulatory Activities: Key Terms on Twitter Bookmark EPAct Transportation Regulatory Activities: Key Terms on Google Bookmark EPAct Transportation Regulatory Activities: Key Terms on Delicious Rank EPAct Transportation Regulatory Activities: Key Terms on Digg Find More places to share EPAct Transportation Regulatory Activities: Key Terms on AddThis.com... Home About Covered Fleets Compliance Methods Alternative Fuel Petitions Resources Guidance Documents Statutes & Regulations Program Annual Reports Fact Sheets Newsletter Case Studies Workshops Tools Key Terms FAQs Key Terms The Energy Policy Act (EPAct) includes specific terminology related to

404

Reactive transport modeling to study changes in water chemistry induced by CO2 injection at the Frio-I brine pilot  

SciTech Connect

To demonstrate the potential for geologic storage of CO{sub 2} in saline aquifers, the Frio-I Brine Pilot was conducted, during which 1600 tons of CO{sub 2} were injected into a high-permeability sandstone and the resulting subsurface plume of CO{sub 2} was monitored using a variety of hydrogeological, geophysical, and geochemical techniques. Fluid samples were obtained before CO{sub 2} injection for baseline geochemical characterization, during the CO{sub 2} injection to track its breakthrough at a nearby observation well, and after injection to investigate changes in fluid composition and potential leakage into an overlying zone. Following CO{sub 2} breakthrough at the observation well, brine samples showed sharp drops in pH, pronounced increases in HCO{sub 3}{sup -} and aqueous Fe, and significant shifts in the isotopic compositions of H{sub 2}O and dissolved inorganic carbon. Based on a calibrated 1-D radial flow model, reactive transport modeling was performed for the Frio-I Brine Pilot. A simple kinetic model of Fe release from the solid to aqueous phase was developed, which can reproduce the observed increases in aqueous Fe concentration. Brine samples collected after half a year had lower Fe concentrations due to carbonate precipitation, and this trend can be also captured by our modeling. The paper provides a method for estimating potential mobile Fe inventory, and its bounding concentration in the storage formation from limited observation data. Long-term simulations show that the CO{sub 2} plume gradually spreads outward due to capillary forces, and the gas saturation gradually decreases due to its dissolution and precipitation of carbonates. The gas phase is predicted to disappear after 500 years. Elevated aqueous CO{sub 2} concentrations remain for a longer time, but eventually decrease due to carbonate precipitation. For the Frio-I Brine Pilot, all injected CO{sub 2} could ultimately be sequestered as carbonate minerals.

Kharaka, Y.K; Doughty, C.; Freifeld, B.M.; Daley, T.M.; Xu, T.

2009-11-01T23:59:59.000Z

405

Catalyst containing oxygen transport membrane  

SciTech Connect

A composite oxygen transport membrane having a dense layer, a porous support layer and an intermediate porous layer located between the dense layer and the porous support layer. Both the dense layer and the intermediate porous layer are formed from an ionic conductive material to conduct oxygen ions and an electrically conductive material to conduct electrons. The porous support layer has a high permeability, high porosity, and a high average pore diameter and the intermediate porous layer has a lower permeability and lower pore diameter than the porous support layer. Catalyst particles selected to promote oxidation of a combustible substance are located in the intermediate porous layer and in the porous support adjacent to the intermediate porous layer. The catalyst particles can be formed by wicking a solution of catalyst precursors through the porous support toward the intermediate porous layer.

Christie, Gervase Maxwell; Wilson, Jamie Robyn; van Hassel, Bart Antonie

2012-12-04T23:59:59.000Z

406

Transportation Energy Futures | OpenEI  

Open Energy Info (EERE)

Energy Futures Energy Futures Dataset Summary Description The 2009 National Household Travel Survey (NHTS) provides information to assist transportation planners and policy makers who need comprehensive data on travel and transportation patterns in the United States. The 2009 NHTS updates information gathered in the 2001 NHTS and in prior Nationwide Personal Transportation Surveys (NPTS) conducted in 1969, 1977, 1983, 1990, and 1995. Source U.S. Department of Transportation, Federal Highway Administration Date Released February 28th, 2011 (3 years ago) Date Updated Unknown Keywords NHTS TEF transportation Transportation Energy Futures travel trip Data application/zip icon Travel Day Trip File (zip, 42.6 MiB) application/zip icon Household File (zip, 5 MiB) application/zip icon Person File (zip, 17.4 MiB)

407

Optical Conductivity with Holographic Lattices  

E-Print Network (OSTI)

We add a gravitational background lattice to the simplest holographic model of matter at finite density and calculate the optical conductivity. With the lattice, the zero frequency delta function found in previous calculations (resulting from translation invariance) is broadened and the DC conductivity is finite. The optical conductivity exhibits a Drude peak with a cross-over to power-law behavior at higher frequencies. Surprisingly, these results bear a strong resemblance to the properties of some of the cuprates.

Gary T. Horowitz; Jorge E. Santos; David Tong

2012-08-03T23:59:59.000Z

408

Comparative analysis of the transportation of select petrochemicals  

Science Journals Connector (OSTI)

Large volumes of hazardous cargo move across US roadways daily. Field counts are conducted on sections of roadway that provide aggregated volumes. A high level of interest exists in acquiring the capability to replicate these periodic field counts through a computer-simulated programme. Base data and computer simulation models were identified, which could be coordinated with field counts. The corridor traversing the core of Houston's petrochemical industry served as the study area. Simulation data on producers and chemicals within the area were analysed, and alternate means of transportation were identified, to select chemicals most likely to be transported to the geographic area by truck. The likely frequency of shipments was calculated and compared to the field data. The study outcome reflected a good fit between the simulation and the field counts, providing positive conditions for application of the model to other corridors and showing strong potential for its predictive value.

Kevin L. Stamber; Mark A. Ehlen; Mark Pepple; Margaret E. Welk; Haoran Deng; Carol A. Lewis; Latissha Clark; James R. Bryant; Debbie Jasek

2013-01-01T23:59:59.000Z

409

Conductivity of a Warm Plasma  

Science Journals Connector (OSTI)

A theory for obtaining the conductivity of a uniform plasma as a function of frequency and temperature is presented and compared with a number of recent treatments.

Lyman Mower

1959-10-01T23:59:59.000Z

410

Appendix C Conducting Structured Walkthroughs  

Directives, Delegations, and Requirements

This guide describes how to conduct a structured walkthroughs during the lifecycle stages of software engineering projects, regardless of hardware platform.

1997-05-21T23:59:59.000Z

411

BPA Hotline & Codes of Conduct  

NLE Websites -- All DOE Office Websites (Extended Search)

Hotline & Codes of Conduct Pages default Sign In About | Careers | Contact | Investors | bpa.gov Search News & Us Expand News & Us Projects & Initiatives Expand Projects &...

412

Optical Modulation of Molecular Conductance  

NLE Websites -- All DOE Office Websites (Extended Search)

Optical Modulation of Molecular Conductance Authors: Battacharyya, S., Kibel, A., Kodis, G., Liddell, P. A., Gervaldo, M., Gust, D., and Lindsay, S. Title: Optical Modulation of...

413

Drift-Scale Radionuclide Transport  

SciTech Connect

The purpose of this model report is to document the drift scale radionuclide transport model, taking into account the effects of emplacement drifts on flow and transport in the vicinity of the drift, which are not captured in the mountain-scale unsaturated zone (UZ) flow and transport models ''UZ Flow Models and Submodels'' (BSC 2004 [DIRS 169861]), ''Radionuclide Transport Models Under Ambient Conditions'' (BSC 2004 [DIRS 164500]), and ''Particle Tracking Model and Abstraction of Transport Process'' (BSC 2004 [DIRS 170041]). The drift scale radionuclide transport model is intended to be used as an alternative model for comparison with the engineered barrier system (EBS) radionuclide transport model ''EBS Radionuclide Transport Abstraction'' (BSC 2004 [DIRS 169868]). For that purpose, two alternative models have been developed for drift-scale radionuclide transport. One of the alternative models is a dual continuum flow and transport model called the drift shadow model. The effects of variations in the flow field and fracture-matrix interaction in the vicinity of a waste emplacement drift are investigated through sensitivity studies using the drift shadow model (Houseworth et al. 2003 [DIRS 164394]). In this model, the flow is significantly perturbed (reduced) beneath the waste emplacement drifts. However, comparisons of transport in this perturbed flow field with transport in an unperturbed flow field show similar results if the transport is initiated in the rock matrix. This has led to a second alternative model, called the fracture-matrix partitioning model, that focuses on the partitioning of radionuclide transport between the fractures and matrix upon exiting the waste emplacement drift. The fracture-matrix partitioning model computes the partitioning, between fractures and matrix, of diffusive radionuclide transport from the invert (for drifts without seepage) into the rock water. The invert is the structure constructed in a drift to provide the floor of the drift. The reason for introducing the fracture-matrix partitioning model is to broaden the conceptual model for flow beneath waste emplacement drifts in a way that does not rely on the specific flow behavior predicted by a dual continuum model and to ensure that radionuclide transport is not underestimated. The fracture-matrix partitioning model provides an alternative method of computing the partitioning of radionuclide releases from drifts without seepage into rock fractures and rock matrix. Drifts without seepage are much more likely to have a significant fraction of radionuclide releases into the rock matrix, and therefore warrant additional attention in terms of the partitioning model used for TSPA.

J. Houseworth

2004-09-22T23:59:59.000Z

414

UBC Social Ecological Economic Development Studies (SEEDS) Student Report Triple bottom line assessment of transport options for the UBC farm  

E-Print Network (OSTI)

UBC Social Ecological Economic Development Studies (SEEDS) Student Report Triple bottom line and analyzes viable vehicle options to be used at the UBC Farm using Triple bottom line assessment. These options include powering the vehicle with the traditional fossil fuels, natural gas, biodiesel, or use

415

Nuclear Instruments and Methods in Physics Research A 542 (2005) 134141 Study of water distribution and transport in a polymer  

E-Print Network (OSTI)

Nuclear Instruments and Methods in Physics Research A 542 (2005) 134­141 Study of water has been developed at the Penn State Breazeale Nuclear Reactor. Neutron images allow us to visualize blockage was observed to occur at low power, while higher power conditions resulted in more dispersed

Mench, Matthew M.

416

TRANSPORTATION SYSTEMS AND THE BUILT ENVIRONMENT:1 A LIFE-CYCLE ENERGY CASE STUDY AND ANALYSIS2  

E-Print Network (OSTI)

BACKGROUND2 3 As the second largest energy consumer and greenhouse gas (GHG) emitter (behind China, U.S.4 in reducing U.S.13 GHG emissions over time, while improving the nation's energy security and moderating a14 environment can be used to influence travel demand, but very few studies consider the22 relative energy

Kockelman, Kara M.

417

Transportation Policies: Examples and Lessons  

Science Journals Connector (OSTI)

The approaches to formulating sustainable transportation policies have been applied in a case study in Guangzhou, Peoples Republic of China, which is described in Chapter 7. To provide a foundation for the wo...

2007-01-01T23:59:59.000Z

418

CTS Transportation Research Conference April 28, 2010  

E-Print Network (OSTI)

CTS Transportation Research Conference April 28, 2010 Sheila Hatchell, Mn/DOT Library Arlene Mathison, CTS Library Services 1 #12;!!Goal: To make transportation information more readily available throughout Minnesota !!Collaborative effort of Mn/DOT, the Center for Transportation Studies, and the Local

Minnesota, University of

419

ON LANDSCAPE FUNCTIONS ASSOCIATED WITH TRANSPORT PATHS  

E-Print Network (OSTI)

ON LANDSCAPE FUNCTIONS ASSOCIATED WITH TRANSPORT PATHS QINGLAN XIA Abstract. In this paper, we by Santambrogio in [10]. More precisely, we study landscape functions associated with a transport path be- tween for nonpositive p. We show an equivalence relation be- tween landscape functions associated with an -transport

Xia, Qinglan

420

Modeling non-steady state radioisotope transport in the vadose zone--A case study using uranium isotopes at Pena Blanca, Mexico  

SciTech Connect

Current models using U- and Th-series disequilibria to study radioisotope transport in groundwater systems mostly consider a steady-state situation. These models have limited applicability to the vadose zone (UZ) where the concentration and migratory behavior of radioisotopes in fluid are often transitory. We present here, as a first attempt of its kind, a model simulating the non-steady state, intermittent fluid transport in vadose layers. It provides quantitative constraints on in-situ migration of dissolved and colloidal radioisotopes in terms of retardation factor and rock-water interaction (or water transit) time. For uranium, the simulation predicts that intermittent flushing in the UZ leads to a linear relationship between reciprocal U concentration and {sup 234}U/{sup 238}U ratio in percolating waters, with the intercept and slope bearing information on the rates of dissolution and {alpha}-recoil of U isotopes, respectively. The general validity of the model appears to be borne out by the measurement of uranium isotopes in UZ waters collected at various times over a period during 1995-2006 from a site in the Pena Blanca mining district, Mexico, where the Nopal I uranium deposit is located. Enhanced {sup 234}U/{sup 238}U ratios in vadose-zone waters resulting from lengthened non-flushing time as prescribed by the model provide an interpretative basis for using {sup 234}U/{sup 238}U in cave calcites to reconstruct the regional changes in hydrology and climate. We also provide a theoretical account of the model's potential applications using radium isotopes.

Ku, T. L.; Luo, S.; Goldstein, S. J.; Murrell, M. T.; Chu, W. L.; Dobson, P. F.

2009-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


421

Studies on the in situ electrooxidation and selective permeation of cerium(IV) across a bulk liquid membrane containing tributyl phosphate as the ion transporter  

SciTech Connect

The results of experiments carried out to develop a liquid membrane (LM) technique for the extractive permeation of cerium from nitric acid solutions are described. In-situ electrooxidation of Ce{sup 3+} to extractable Ce{sup 4+} and its transport across bulk LM (BLM) composed of tri-n-butyl phosphate (TBP)/dodecane mixtures was systematically studied under varied hydrodynamical and chemical conditions. The permeability of metal ions across the BLM was dependent on the efficiency of extraction, ionic activity of feed solutions, stirring rate, composition of the receiving phase, etc. The transport rates were found to vary linearly (a log-log correlation) with the cation concentration in feed solutions and concentration of TBP in BLM. A permeation velocity equation for cerium ion through the membrane has been proposed. More than 90% permeation of Ce with a maximum flux of 8.63 x 10{sup {minus}5} mol/m{sup 2}/s could be accomplished under the experimental conditions: stirring rates at feed and strip solutions were 380 and 300 rpm, respectively; feed was 1 mol/dm{sup 3} of HNO{sub 3} containing 0.005 mol/dm{sup 3} Ce(NO{sub 3}){sub 3}; LM contained 30% TBP/dodecane; and the receiving phase was distilled water. Radiochemically pure Ce-144 was partitioned from the Ce-Am mixture obtained by extraction chromatographic fractioning of high level radioactive waste. This also resulted in the purification of Am-241 in the feed solution with a decontamination factor of {approximately} 12 from Ce.

Kedari, C.S.; Pandit, S.S.; Ramanujam, A. [Bhabha Atomic Research Centre, Trombay (India). Fuel Reprocessing Div.] [Bhabha Atomic Research Centre, Trombay (India). Fuel Reprocessing Div.

1999-06-01T23:59:59.000Z

422

Test Procedure Conducted Energy Weapons  

E-Print Network (OSTI)

Test Procedure for Conducted Energy Weapons Version 1.1 2010/07/31 #12;Contents Page 0.0 Disclaimer A TASER M26 13 Appendix B TASER X26 23 #12;1 Test Procedure for Conducted Energy Weapons 0.0 Disclaimer Energy Weapons ("CEWs") in a controlled and repeatable manner across jurisdictions. The consistent

Adler, Andy

423

Atomic transport in metastable compounds: Case study of self-diffusion in Si-C-N films using neutron reflectometry  

Science Journals Connector (OSTI)

The investigation of atomic mobilities in transient metastable phases is a challenging task in diffusion science. For amorphous silicon carbonitrides we identified a transient metastable bonding configuration by Fourier-transform infrared spectroscopy on samples annealed in a defined time-temperature domain. We demonstrate that it is possible to determine nitrogen self-diffusivities in this state using neutron reflectometry. The results revealed that the diffusion experiments on this system are feasible only if very short diffusion lengths on the order of 1 nm and very low diffusivities can be measured, as it is the case for neutron reflectometry technique applied in our studies.

E. Hger; H. Schmidt; J. Stahn; B. Braunschweig; U. Geckle; M. Bruns; A. Markwitz

2009-12-09T23:59:59.000Z

424

The Effect of Sedimentation on Plutonium Transport in Fourmile Branch  

SciTech Connect

The major mechanisms of radioactive material transport and fate in surface water are sources, dilution, advection and dispersion of radionuclides by flow and surface waves, radionuclide decay, and interaction between sediment and radionuclides. STREAM II, an aqueous transport module of the Savannah River Site emergency response WIND system, accounts for the source term, and the effects of dilution, advection and dispersion. Although the model has the capability to account for nuclear decay, due to the short time interval of interest for emergency response, the effect of nuclear decay is very small and so it is not employed. The interactions between the sediment and radionuclides are controlled by the flow conditions and physical and chemical characteristics of the radionuclides and the sediment constituents. The STREAM II version used in emergency response must provide results relatively quickly; it therefore does not model the effects of sediment deposition/resuspension. This study estimates the effects of sediment deposition/resuspension on aqueous plutonium transport in Fourmile Branch. There are no measured data on plutonium transport through surface water available for direct model calibration. Therefore, a literature search was conducted to find the range of plutonium partition coefficients based on laboratory experiments and field measurements. A sensitivity study of the calculated plutonium peak concentrations as a function of the input parameter of partition coefficient was then performed. Finally, an estimation of the plutonium partition coefficient was made for the Fourmile Branch.

Chen, K.F.

2002-02-21T23:59:59.000Z

425

Note: Local thermal conductivities from boundary driven non-equilibrium molecular dynamics simulations  

SciTech Connect

We report non-equilibrium molecular dynamics simulations of heat transport in models of molecular fluids. We show that the local thermal conductivities obtained from non-equilibrium molecular dynamics simulations agree within numerical accuracy with equilibrium Green-Kubo computations. Our results support the local equilibrium hypothesis for transport properties. We show how to use the local dependence of the thermal gradients to quantify the thermal conductivity of molecular fluids for a wide range of thermodynamic states using a single simulation.

Bresme, F., E-mail: f.bresme@imperial.ac.uk [Department of Chemistry, Chemical Physics Section, Imperial College London, London SW7 2AZ (United Kingdom); Department of Chemistry, Norwegian University of Science and Technology, Trondheim (Norway); Armstrong, J., E-mail: j.armstrong@imperial.ac.uk [Department of Chemistry, Chemical Physics Section, Imperial College London, London SW7 2AZ (United Kingdom)

2014-01-07T23:59:59.000Z

426

Greater-than-Class C low-level radioactive waste transportation regulations and requirements study. National Low-Level Waste Management Program  

SciTech Connect

The purpose of this report is to identify the regulations and requirements for transporting greater-than-Class C (GTCC) low-level radioactive waste (LLW) and to identify planning activities that need to be accomplished in preparation for transporting GTCC LLW. The regulations and requirements for transporting hazardous materials, of which GTCC LLW is included, are complex and include several Federal agencies, state and local governments, and Indian tribes. This report is divided into five sections and three appendices. Section 1 introduces the report. Section 2 identifies and discusses the transportation regulations and requirements. The regulations and requirements are divided into Federal, state, local government, and Indian tribes subsections. This report does not identify the regulations or requirements of specific state, local government, and Indian tribes, since the storage, treatment, and disposal facility locations and transportation routes have not been specifically identified. Section 3 identifies the planning needed to ensure that all transportation activities are in compliance with the regulations and requirements. It is divided into (a) transportation packaging; (b) transportation operations; (c) system safety and risk analysis, (d) route selection; (e) emergency preparedness and response; and (f) safeguards and security. This section does not provide actual planning since the details of the Department of Energy (DOE) GTCC LLW Program have not been finalized, e.g., waste characterization and quantity, storage, treatment and disposal facility locations, and acceptance criteria. Sections 4 and 5 provide conclusions and referenced documents, respectively.

Tyacke, M.; Schmitt, R.

1993-07-01T23:59:59.000Z

427

LEDSGP/Transportation Toolkit/Contact Us | Open Energy Information  

Open Energy Info (EERE)

LEDSGP/Transportation Toolkit/Contact Us LEDSGP/Transportation Toolkit/Contact Us < LEDSGP‎ | Transportation Toolkit(Redirected from Transportation Toolkit/Contact Us) Jump to: navigation, search LEDSGP Logo.png Transportation Toolkit Home Tools Training Contacts Contacts for the LEDS GP Transport Working Group The Transportation Toolkit is provided by the Transport Working Group as part of the Low Emission Development Strategies (LEDS) Global Partnership. If you have questions or comments about this toolkit, . Remote Expert Assistance on LEDS The LEDS Global Partnership provides timely, high-quality, no-fee technical assistance on transportation issues as part of the Remote Expert Assistance on LEDS (REAL) service. Experts from institutions around the world are available to provide objective advice, conduct reviews and brief

428

Experimental thermal conductivity and contact conductance of graphite composites  

E-Print Network (OSTI)

Graphite fiber organic matrix composites were reviewed ics. for potential heat sink applications in the electronics packaging determined the effective transverse and longitudinal thermal industry. This experimental investigation conductivity...

Jackson, Marian Christine

2012-06-07T23:59:59.000Z

429

Water uptake, ionic conductivity and swelling properties of anion-exchange membrane  

E-Print Network (OSTI)

occurs with negative excess volume of mixing. Percolative nature of the ion transport has been is reduced at the cathode to produce OH? , which transports through the anion-exchange membrane (AEM membrane, AEM can conduct ions only in the presence of water. In addition, water is one of the reactants

430

Single-Molecule Circuits with Well-Defined Molecular Conductance  

E-Print Network (OSTI)

Single-Molecule Circuits with Well-Defined Molecular Conductance Latha Venkataraman,*,,| Jennifer E conductance measurements of single molecules. For an alkane diamine series with 2-8 carbon atoms leads to well-defined conductance measurements of a single molecule junction in a statistical study

Hone, James

431

OXYGEN TRANSPORT CERAMIC MEMBRANES  

SciTech Connect

This report covers the following tasks: Task 1--Design, fabricate and evaluate ceramic to metal seals based on graded ceramic powder/metal braze joints; Task 2--Evaluate the effect of defect configuration on ceramic membrane conductivity and long term chemical and structural stability; Task 3--Determine materials mechanical properties under conditions of high temperatures and reactive atmospheres; Task 4--Evaluate phase stability and thermal expansion of candidate perovskite membranes and develop techniques to support these materials on porous metal structures; Task 5--Assess the microstructure of membrane materials to evaluate the effects of vacancy-impurity association, defect clusters, and vacancy-dopant association on the membrane performance and stability; and Task 6--Measure kinetics of oxygen uptake and transport in ceramic membrane materials under commercially relevant conditions using isotope labeling techniques.

Dr. Sukumar Bandopadhyay; Dr. Nagendra Nagabhushana

2002-04-01T23:59:59.000Z

432

Twenty-channel bolometer array for studying impurity radiation and transport in the TCS field-reversed configuration  

SciTech Connect

A bolometer array diagnostic has been developed for the University of Washington Translation, Confinement, and Sustainment (TCS) field-reversed configuration (FRC) experiment in order to measure radially resolved total radiated power per unit length of the FRC. This will provide radiation energy loss information, useful in power balance and impurity studies. The 20-element photodiode bolometer will be mounted at the midplane of the TCS cylindrical vacuum chamber to view the rotating magnetic field (RMF) generated FRC plasma. Key features of this new bolometer array are (1) extensive electrical shielding against the RMF, (2) robust electrical isolation, (3) trans-impedance amplifiers using a microcoax interface at the array and a fiber optic interface to the screen room, and (4) a custom glass-on-metal socket for the 20-element photodiode chip to ensure high vacuum compatibility. The bolometer array can be retracted behind a gate valve using a stepper motor to protect it during vacuum chamber bakeout. The slit assembly housing is interchangeable to provide flexibility for the viewing sightlines.

Kostora, M. R.; Hsu, S. C.; Wurden, G. A. [Physics Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

2006-10-15T23:59:59.000Z

433

Lubbock Metropolitan Transportation Plan  

E-Print Network (OSTI)

in the foreground and the Lubbock Area Veterans Memorial in the background EXECUTIVE SUMMARY This Metropolitan Transportation Plan was developed based upon the four Lubbock Metropolitan Planning Organization?s (MPO) goals of Improve Safety ? Congestion...: researching proposed routes; studying environmental impacts; performing engineering surveys; holding public hearings; signing agreements with the counties or cities (if needed to fulfill state or federal requirements); acquiring right-of-way; producing...

Lubbock Metropolitan Planning Organization

2007-09-18T23:59:59.000Z

434

California GAMA Special Study: An isotopic and dissolved gas investigation of nitrate source and transport to a public supply well in California's Central Valley  

SciTech Connect

This study investigates nitrate contamination of a deep municipal drinking water production well in Ripon, CA to demonstrate the utility of natural groundwater tracers in constraining the sources and transport of nitrate to deep aquifers in the Central Valley. The goal of the study was to investigate the origin (source) of elevated nitrate and the potential for the deep aquifer to attenuate anthropogenic nitrate. The site is ideal for such an investigation. The production well is screened from 165-325 feet below ground surface and a number of nearby shallow and deep monitoring wells were available for sampling. Furthermore, potential sources of nitrate contamination to the well had been identified, including a fertilizer supply plant located approximately 1000 feet to the east and local almond groves. A variety of natural isotopic and dissolved gas tracers including {sup 3}H-{sup 3}He groundwater age and the isotopic composition of nitrate are applied to identify nitrate sources and to characterize nitrate transport. An advanced method for sampling production wells is employed to help identify contaminant contributions from specific screen intervals. Nitrate transport: Groundwater nitrate at this field site is not being actively denitrified. Groundwater parameters indicate oxic conditions, the dissolved gas data shows no evidence for excess nitrogen as the result of denitrification, and nitrate-N and -O isotope compositions do not display patterns typical of denitrification. Contaminant nitrate source: The ambient nitrate concentration in shallow groundwater at the Ripon site ({approx}12 mg/L as nitrate) is typical of shallow groundwaters affected by recharge from agricultural and urban areas. Nitrate concentrations in Ripon City Well 12 (50-58 mg/L as nitrate) are significantly higher than these ambient concentrations, indicating an additional source of anthropogenic nitrate is affecting groundwater in the capture zone of this municipal drinking water well. This study provides two new pieces of evidence that the Ripon Farm Services Plant is the source of elevated nitrate in Ripon City Well 12. (1) Chemical mass balance calculations using nitrate concentration, nitrate isotopic composition, and initial tritium activity all indicate that that the source water for elevated nitrate to Ripon City Well 12 is a very small component of the water produced by City Well 12 and thus must have extremely high nitrate concentration. The high source water nitrate concentration ({approx}1500 mg/L as nitrate) required by these mass balance calculations precludes common sources of nitrate such as irrigated agriculture, dairy wastewater, and septic discharge. Shallow groundwater under the Ripon Farm Services RFS plant does contain extremely high concentrations of nitrate (>1700 mg/L as nitrate). (2) Nitrogen and oxygen isotope compositions of nitrate indicate that the additional anthropogenic nitrate source to Ripon City Well 12 is significantly enriched in {delta}{sup 18}O-NO{sub 3}, an isotopic signature consistent with synthetic nitrate fertilizer, and not with human or animal wastewater discharge (i.e. dairy operations, septic system discharge, or municipal wastewater discharge), or with organic fertilizer. Monitoring wells on and near the RFS plant also have high {delta}{sup 18}O-NO{sub 3}, and the plant has handled and stored synthetic nitrate fertilizer that will have this isotopic signature. The results described here highlight the complexity of attributing nitrate found in long screened, high capacity wells to specific sources. In this case, the presence of a very high concentration source near the well site combined with sampling using multiple isotopic tracer techniques and specialized depth-specific techniques allowed fingerprinting of the source in the mixed-age samples drawn from the production well.

Singleton, M J; Moran, J E; Esser, B K; Roberts, S K; Hillegonds, D J

2010-04-14T23:59:59.000Z

435

OXYGEN TRANSPORT CERAMIC MEMBRANES  

SciTech Connect

This is the third quarterly report on oxygen Transport Ceramic Membranes. In the following, the report describes the progress made by our university partners in Tasks 1 through 6, experimental apparatus that was designed and built for various tasks of this project, thermodynamic calculations, where applicable and work planned for the future. (Task 1) Design, fabricate and evaluate ceramic to metal seals based on graded ceramic powder/metal braze joints. (Task 2) Evaluate the effect of defect configuration on ceramic membrane conductivity and long term chemical and structural stability. (Task 3) Determine materials mechanical properties under conditions of high temperatures and reactive atmospheres. (Task 4) Evaluate phase stability and thermal expansion of candidate perovskite membranes and develop techniques to support these materials on porous metal structures. (Task 5) Assess the microstructure of membrane materials to evaluate the effects of vacancy-impurity association, defect clusters, and vacancy-dopant association on the membrane performance and stability. (Task 6) Measure kinetics of oxygen uptake and transport in ceramic membrane materials under commercially relevant conditions using isotope labeling techniques.

Dr. Sukumar Bandopadhyay; Dr. Nagendra Nagabhushana

2000-10-01T23:59:59.000Z

436

Efficiency and Evolution of Water Transport Systems in Higher Plants: A Modelling Approach. II. Stelar Evolution  

Science Journals Connector (OSTI)

...July 1994 research-article Efficiency and Evolution of Water Transport Systems in Higher...protostele and siphonostele in water conduction was analysed numerically...identical with regard to water transport efficiency. The Royal Society is collaborating...

1994-01-01T23:59:59.000Z

437

Transportation Security | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Transportation Security SHARE Global Threat Reduction Initiative Transportation Security Cooperation Secure Transport Operations (STOP) Box Security of radioactive material while...

438

Transportation Security | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Transportation Security Transportation Security Transportation Security More Documents & Publications Overview for Newcomers West Valley Demonstration Project Low-Level Waste...

439

News Release: DOE to Conduct Additional Groundwater Tests at Riverton  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

to Conduct Additional Groundwater Tests at to Conduct Additional Groundwater Tests at Riverton UMTRCA Site News Release: DOE to Conduct Additional Groundwater Tests at Riverton UMTRCA Site July 30, 2012 - 11:08am Addthis News Contact: Contractor, Judy Miller, S.M. Stoller Corporation Public Affairs (970) 248-6363 jmiller@lm.doe.gov Tests will indicate progress of current groundwater remediation strategy The U.S. Department of Energy will conduct additional characterization work at the Riverton, WY, Uranium Mill Tailings Radiation Control Act (UMTRCA) Site this summer, including extensive groundwater and soil sampling. The Department will use the sampling results to update the site conceptual model and to develop a revised groundwater flow and transport model to more accurately simulate natural flushing processes.

440

Development of mixed-conducting ceramic membranes for hydrogen separation.  

SciTech Connect

SrCeO{sub 3}- and BaCeO{sub 3}-based proton conductors have been prepared and their transport properties have been investigated by impedance spectroscopy in conjunction with open circuit voltage and water vapor evolution measurements. BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}} exhibits the highest conductivity in a hydrogen-containing atmosphere; however, its electronic conductivity is not adequate for hydrogen separation in a nongalvanic mode. In an effort to enhance ambipolar conductivity and improve interfacial catalytic properties, BaCe{sub 0.8}Y{sub 0.2}O{sub 3-{delta}} cermets have been fabricated into membranes. The effects of ambipolar conductivity, membrane thickness, and interfacial resistance on permeation rates have been investigated. In particular, the significance of interfacial resistance is emphasized.

Guan, J.

1998-05-18T23:59:59.000Z

Note: This page contains sample records for the topic "transportation studies conducted" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


441

Strategic Freight Transportation Contract Procurement  

E-Print Network (OSTI)

Based Procurement for Transportation Services, Journal ofCoia, A. , Evolving transportation exchanges, World trade,an Auction Based Transportation Marketplace, Transportation

Nandiraju, Srinivas

2006-01-01T23:59:59.000Z

442

H.R. 4944: An Act to authorize the Secretary of the Interior to conduct studies regarding the desalination of water and water reuse, and for other purposes. Introduced in the Senate of the United States, One Hundred Third Congress, Second Session, October 4, 1994  

SciTech Connect

The report H.R. 4944 is a bill to authorize the Secretary of the Interior to conduct studies regarding the desalination of water and water reuse. The proposed legislative text is included.

NONE

1994-12-31T23:59:59.000Z

443

"Educating transportation professionals."  

E-Print Network (OSTI)

"Educating transportation professionals." Michael Demetsky Henry L. Kinnier Professor mjd of Virginia Charlottesville, VA 434.924.7464 Transportation Engineering & Management Research Our group works closely with the Virginia Center for Transportation Innovation and Research (VCTIR), located

Acton, Scott

444

Electrical and Thermoelectrical Transport Properties of Graphene  

E-Print Network (OSTI)

IV Large Memory Effect in Graphene Based Devices IV-1Transport Properties of Graphene A Dissertation submitted into study the new material, graphene. By investigating the

Wang, Deqi

2011-01-01T23:59:59.000Z

445

Phase II Nuclide Partition Laboratory Study Influence of Cellulose Degradation Products on the Transport of Nuclides from SRS Shallow Land Burial Facilities  

SciTech Connect

Degradation products of cellulosic materials (e.g., paper and wood products) can significantly influence the subsurface transport of metals and radionuclides. Codisposal of radionuclides with cellulosic materials in the E-Area slit trenches at the Savannah River Site (SRS) is, therefore, expected to influence nuclide fate and transport in the subsurface. Due to the complexities of these systems and the scarcity of site-specific data, the effects of cellulose waste loading and its subsequent influence on nuclide transport are not well established.

Serkiz, S.M.

1999-10-04T23:59:59.000Z

446

Probabilistic risk assessment and nuclear waste transportation: A case study of the use of RADTRAN in the 1986 Environmental Assessment for Yucca Mountain  

SciTech Connect

The analysis of the risks of transporting irradiated nuclear fuel to a federal repository, Appendix A of the DOE Environmental Assessment for Yucca Mountain (DOE84), is based on the RADTRAN model and input parameters. The RADTRAN computer code calculates the radiation exposures and health effects under normal or incident-free transport, and over all credible accident conditions. The RADTRAN model also calculates the economic consequences of transportation accidents, though these costs were not included in the Department`s Environmental Assessment for the proposed Yucca Mountain repository.

Resnikoff, M. [Radioactive Waste Management Associates, New York, NY (United States)

1990-12-01T23:59:59.000Z

447

Fermi surfaces and anomalous transport in quasicrystals  

Science Journals Connector (OSTI)

Electronic transport properties of quasicrystals are discussed theoretically. By means of ab initio linear muffin tin orbitals calculations, electronic band structure and corresponding Fermi surfaces of several quasicrystalline approximants are obtained. A criterion for distinguishing between metallic and anomalous transport properties in intermetallics is proposed. Unconventional temperature dependence of conductivity of quasicrystals and approximants is addressed in a second part. It is shown that power law exponents can be directly deduced from scaling analysis of the Kubo formula. Finally in relation to our results, we briefly summarize actual knowledge on low temperature transport regimes.

S. Roche and T. Fujiwara

1998-11-01T23:59:59.000Z

448

Method of Synthesis of Proton Conducting Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Method of Synthesis of Proton Conducting Materials Method of Synthesis of Proton Conducting Materials A method of producing a proton conducting material. Available for thumbnail of...

449

Thermal Energy Transport in Nanostructured Materials  

NLE Websites -- All DOE Office Websites (Extended Search)

Thermal Energy Transport in Nanostructured Materials Thermal Energy Transport in Nanostructured Materials Speaker(s): Ravi Prasher Date: August 25, 2008 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Ashok Gadgil World energy demand is expected to reach ~30 TW by 2050 from the current demand of ~13 TW. This requires substantial technological innovation. Thermal energy transport and conversion play a very significant role in more than 90% of energy technologies. All four modes of thermal energy transport, conduction, convection, radiation, and phase change (e.g. evaporation/boiling) are important in various energy technologies such as vapor compression power plants, refrigeration, internal combustion engines and building heating/cooling. Similarly thermal transport play a critical role in electronics cooling as the performance and reliability of

450

Pump-probe measurements of the thermal conductivity tensor for materials lacking in-plane symmetry  

SciTech Connect

We previously demonstrated an extension of time-domain thermoreflectance (TDTR) which utilizes offset pump and probe laser locations to measure in-plane thermal transport properties of multilayers. However, the technique was limited to systems of transversely isotropic materials studied using axisymmetric laser intensities. Here, we extend the mathematics so that data reduction can be performed on non-transversely isotropic systems. An analytic solution of the diffusion equation for an N-layer system is given, where each layer has a homogenous but otherwise arbitrary thermal conductivity tensor and the illuminating spots have arbitrary intensity profiles. As a demonstration, we use both TDTR and time-resolved magneto-optic Kerr effect measurements to obtain thermal conductivity tensor elements of <110> ?-SiO{sub 2}. We show that the out-of-phase beam offset sweep has full-width half-maxima that contains nearly independent sensitivity to the in-plane thermal conductivity corresponding to the scanning direction. Also, we demonstrate a Nb-V alloy as a low thermal conductivity TDTR transducer layer that helps improve the accuracy of in-plane measurements.

Feser, Joseph P. [Department of Mechanical Engineering, University of Delaware, Newark, Delaware 19716 (United States); Liu, Jun; Cahill, David G. [Department of Materials Science and Engineering, and Frederick-Seitz Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States)

2014-10-15T23:59:59.000Z

451

Enhanced Power Stability for Proton Conducting Solid Oxides Fuel Cells  

SciTech Connect

In order to provide the basis for a rational approach to improving the performance of Y-doped BaZrO{sub 3} electrolytes for proton conducting ceramic fuel cells, we carried out a series of coupled computational and experimental studies to arrive at a consensus view of the characteristics affecting the proton conductivity of these systems. The computational part of the project developed a practical first principles approach to predicting the proton mobility as a function of temperature and doping for polycrystalline systems. This is a significant breakthrough representing the first time that first principles methods have been used to study diffusion across grain boundaries in such systems. The basis for this breakthrough was the development of the ReaxFF reactive force field that accurately describes the structure and energetics of Y-doped BaZrO{sub 3} as the proton hops from site to site. The ReaxFF parameters are all derived from an extensive set of quantum mechanics calculations on various clusters, two dimensionally infinite slabs, and three dimensionally infinite periodic systems for combinations of metals, metal alloys, metal oxides, pure and Y-doped BaZrO{sub 3}, including chemical reaction pathways and proton transport pathways, structures. The ReaxFF force field enables molecular dynamics simulations to be carried out quickly for systems with {approx} 10,000 atoms rather than the {approx}100 or so practical for QM. The first 2.5 years were spent on developing and validating the ReaxFF and we have only had an opportunity to apply these methods to only a few test cases. However these simulations lead to transport properties (diffusion coefficients and activation energy) for multi-granular systems in good agreement with current experimental results. Now that we have validated the ReaxFF for diffusion across grain boundaries, we are in the position of being able to use computation to explore strategies to improve the diffusion of protons across grain boundaries, which both theory and experiment agree is the cause of the low conductivity of multi-granular systems. Our plan for a future project is to use the theory to optimize the additives and processing conditions and following this with experiment on the most promising systems. The experimental part of this project focused on improving the synthetic techniques for controlling the grain size and making measurements on the properties of these systems as a function of doping of impurities and of process conditions. A significant attention was paid to screening potential cathode materials (transition metal perovskites) and anode electrocatalysts (metals) for reactivity with Y-doped BaZrO{sub 3}, fabrication compatibility, and chemical stability in fuel cell environment. A robust method for fabricating crack-free thin membranes, as well as methods for sealing anode and cathode chambers, have been successfully developed. Our Pt|BYZ|Pt fuel cell, with a 100 {micro}m thick Y-doped BaZrO{sub 3} electrolyte layer, demonstrates the peak power density and short circuit current density of 28 mW/cm{sup 2} and 130mA/cm{sup 2}, respectively. These are the highest values of this type of fuel cell. All of these provide the basis for a future project in which theory and computation are combined to develop modified ceramic electrolytes capable of both high proton conductivity and excellent mechanical and chemical stability.

Boris Merinov; William A. Goddard III; Sossina Haile; Adri van Duin; Peter Babilo; Sang Soo Han

2005-12-29T23:59:59.000Z

452

Transportation Efficiency Resources  

Energy.gov (U.S. Department of Energy (DOE))

Transportation efficiency reduces travel demand as measured by vehicle miles traveled (VMT). While transportation efficiency policies are often implemented under local governments, national and...

453

Transportation and its Infrastructure  

E-Print Network (OSTI)

cost to mitigate transports GHG emissions. There are alsoenergy consumption and GHG mitigation, especially inParis, 2005. ECON, 2003: GHG Emissions from International

2007-01-01T23:59:59.000Z

454

Transportation and its Infrastructure  

E-Print Network (OSTI)

Transport and its infrastructure Chapter 5 Hybrid vehiclesincluding hybrid- Transport and its infrastructure Chapter 5infrastructure Gt CO 2 -eq 1 - Diesels (LDVs) 2 - Hybrids (

2007-01-01T23:59:59.000Z

455

Sustainability and Transport  

E-Print Network (OSTI)

2005. Integrating Sustainability into the Trans- portationTHOUGHT PIECE Sustainability and Transport by Richardof the concept of sustainability to transport planning. In

Gilbert, Richard

2006-01-01T23:59:59.000Z

456

Assimilation of observations of radiation level into an atmospheric transport model: A case study with the particle filter and the ETEX tracer dataset  

Science Journals Connector (OSTI)

Atmospheric transport models and observations from monitoring networks are commonly used aids for forecasting spatial distribution of contamination in case of a radiological incident. In this study, we assessed the particle filter data-assimilation technique as a tool for ensemble forecasting the spread of radioactivity. We used measurements from the ETEX-1 tracer experiment and model results from the NPK-Puff atmospheric dispersion model. We showed that assimilation of observations improves the ensemble forecast compared to runs without data assimilation. The improvement is most prominent for nowcasting: the mean squared error was reduced by a factor of 7. For forecasting, the improvement of the mean squared error resulting from assimilation of observations was found to dissipate within a few hours. We ranked absolute model values and observations and calculated the mean squared error of the ranked values. This measure of the correctness of the pattern of high and low values showed an improvement for forecasting up to 48h. We conclude that the particle filter is an effective tool in better modeling the spread of radioactivity following a release.

Paul H. Hiemstra; Derek Karssenberg; Arjan van Dijk

2011-01-01T23:59:59.000Z

457

Transport study of hafnium(IV) and zirconium(IV) ions mutual separation by using Tri-n-butyl phosphate-xylene-based supported liquid membranes  

SciTech Connect

A Hf transport study through supported liquid membranes has been carried out to determine flux and permeability data for this metal ion. Tri-n-butyl phosphate (TBP)-xylene-based liquid membranes supported in polypropylene hydrophobic microporous film have been used. These data for hafnium and the previous data for zirconium have furnished the Zr to Hf flux ratio (S) as a function of nitric acid and TBP concentrations of the order of 12 in a single stage at room temperature. Optimum conditions for the separation of these two metal ions appear to 5-6 TBP mol/dm{sup 3} HNO{sub 3}, concentrations {le} 2.93 mol/dm{sup 3}, and 10C. The value of S from an aqueous solution containing 2.4% Hf with respect to Zr has been found to be >125 at 10C and 1.78 mol/dm{sup 3} TBP concentration in the membrane. The technique appears to be feasible for purification of Zr respect to Hf or vice versa.

Chaudry, M.A.; Ahmed, B. (Pakistan Inst. of Nuclear Science and Technology, Islamabad (Pakistan))

1992-02-01T23:59:59.000Z

458

Upscaling of U(VI) Desorption and Transport Using Decimeter-Scale Tanks  

SciTech Connect

Experimental work was used to validate modeling studies and develop multicontinuum models of U(VI) transport in a contaminated aquifer. At the bench scale, it has been shown that U(VI) desorption is rate-limited and that rates are dependent on the bicarbonate concentration. Two decimeter-scale experiments were conducted in order to help establish rigorous upscaling approaches that could be tested at the tracer test and plume scales.

Rodriguez, Derrick [Colorado School of Mines

2014-12-22T23:59:59.000Z

459

Magneto-transport properties of gapped graphene  

Science Journals Connector (OSTI)

Based on the Kubo formula, we have studied the electron transport properties of a gapped graphene in the presence of a strong magnetic field. By solving the Dirac equation, we find that the Landau level spectra in two valleys differ from each other in that the n = 0 level in the K valley is located at top of the valence band, whereas it is at the bottom of the conduction band in the K' valley. Thus, in an individual valley, the symmetry between conduction and valence bands is broken by the presence of a magnetic field. By using the self-consistent Born approximation to treat the long range potential scattering, we formulate the diagonal and the Hall conductivities in terms of the Green function. To perform the numerical calculation, we find that a large bandgap can suppress the quantum Hall effect, owing to the enhancement of the bandgap squeezing the spacing between the low-lying Landau levels. On the other hand, if the bandgap is not very large, the odd integer quantum Hall effect experimentally, observed in the gapless graphene, remains in the gapped one. However, such a result does not indicate the half integer quantum Hall effect in an individual valley of the gapped graphene. This is because the heights of the Hall plateaux in either valley can be continuously tuned by the variation of the bandgap. More interestingly, we find that the height of the diagonal conductivity peak corresponding to the n = 0 Landau level is independent of the bandgap if the scattering is not very strong. In the weak scattering limit, we demonstrate analytically that such a peak takes a universal value e2/(h?), regardless of the bandgap.

Liwei Jiang; Yisong Zheng; Haidong Li; Honghai Shen

2010-01-01T23:59:59.000Z

460

Remedial Action and Waste Disposal Conduct of OperationsMatrix  

SciTech Connect

This Conduct of Operations (CONOPS) matrix incorporates the Environmental Restoration Disposal Facility (ERDF) CONOPS matrix (BHI-00746, Rev. 0). The ERDF CONOPS matrix has been expanded to cover all aspects of the RAWD project. All remedial action and waste disposal (RAWD) operations, including waste remediation, transportation, and disposal at the ERDF consist of construction-type activities as opposed to nuclear power plant-like operations. In keeping with this distinction, the graded approach has been applied to the developmentof this matrix.

M. A. Casbon.

1999-05-24T23:59:59.000Z

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461

ENHANCED THERMAL CONDUCTIVITY IN NANOFLUIDS UNDER THE ACTION OF OSCILLATING FORCE FIELDS  

E-Print Network (OSTI)

. Active control of transport coefficients. Nanocolloïds. Cooling system Introduction Nanofluids (EastmanENHANCED THERMAL CONDUCTIVITY IN NANOFLUIDS UNDER THE ACTION OF OSCILLATING FORCE FIELDS Clément Le forces in the radio frequency and microwave ranges, we show that the thermal conductivity of nanofluids

Paris-Sud XI, Université de

462

Real-Time Dynamic Brake Assessment Conduct a proof-of-concept  

E-Print Network (OSTI)

Real-Time Dynamic Brake Assessment Purpose Conduct a proof-of-concept test to examine the Federal Motor Carrier Safety Administration's Vehicle and Roadside Operations Division Concept stemming conducted for the National Highway Transportation Safety Administration. Signals to be collected Real

463

Electronic transport in graphene-based heterostructures  

SciTech Connect

While boron nitride (BN) substrates have been utilized to achieve high electronic mobilities in graphene field effect transistors, it is unclear how other layered two dimensional (2D) crystals influence the electronic performance of graphene. In this Letter, we study the surface morphology of 2D BN, gallium selenide (GaSe), and transition metal dichalcogenides (tungsten disulfide (WS{sub 2}) and molybdenum disulfide (MoS{sub 2})) crystals and their influence on graphene's electronic quality. Atomic force microscopy analysis shows that these crystals have improved surface roughness (root mean square value of only ?0.1?nm) compared to conventional SiO{sub 2} substrate. While our results confirm that graphene devices exhibit very high electronic mobility (?) on BN substrates, graphene devices on WS{sub 2} substrates (G/WS{sub 2}) are equally promising for high quality electronic transport (????38?000 cm{sup 2}/V s at room temperature), followed by G/MoS{sub 2} (????10?000 cm{sup 2}/V s) and G/GaSe (????2200 cm{sup 2}/V s). However, we observe a significant asymmetry in electron and hole conduction in G/WS{sub 2} and G/MoS{sub 2} heterostructures, most likely due to the presence of sulphur vacancies in the substrate crystals. GaSe crystals are observed to degrade over time even under ambient conditions, leading to a large hysteresis in graphene transport making it a less suitable substrate.

Tan, J. Y.; Avsar, A.; Balakrishnan, J.; Taychatanapat, T.; O'Farrell, E. C. T.; Eda, G.; Castro Neto, A. H. [Graphene Research Center, National University of Singapore, Singapore 117542 (Singapore); Department of Physics, National University of Singapore, Singapore 117542 (Singapore); Koon, G. K. W.; zyilmaz, B., E-mail: barbaros@nus.edu.sg [Graphene Research Center, National University of Singapore, Singapore 117542 (Singapore); Department of Physics, National University of Singapore, Singapore 117542 (Singapore); NanoCore, National University of Singapore, Singapore 117576 (Singapore); Watanabe, K.; Taniguchi, T. [National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044 (Japan)

2014-05-05T23:59:59.000Z

464