Powered by Deep Web Technologies
Note: This page contains sample records for the topic "dendrite lacy needle" 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.


1

lacis-99.PDF  

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

GCM Aerosols and Sub-Grid Cloud Heterogeneity A. A. Lacis, B. Cairns, C. Dello, and W. B. Rossow National Aeronautics and Space Administration Goddard Institute for Space Studies...

2

lacis-98.p;df  

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

Radiation Treatment in the GISS GCM Radiation Treatment in the GISS GCM A. A. Lacis, V. Oinas, and B. Cairns NASA-Goddard Institute for Space Studies New York, New York Introduction The primary role of radiative transfer calculations in climate general circulation models (GCMs) is to provide accurate heating and cooling rates for the radiative energy terms in the fundamental equations. A secondary role is to represent GCM physical processes in terms of radiative quantities that can be effectively compared to satellite and ground-based observational data. Solar Radiation The gaseous absorbers included in the Goddard Institute for Space Studies (GISS) GCM are H 2 O, CO 2 , O 3 , O 2 , and NO 2, utilizing 15 spectrally noncontiguous, vertically correlated k-distribution intervals. Cloud and aerosol radiative

3

Geoengineering: Plan B Remedy for Global Warming Andrew A. Lacis  

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

Geoengineering: Plan B Remedy for Global Warming Geoengineering: Plan B Remedy for Global Warming Andrew A. Lacis NASA Goddard Institute for Space Studies Accelerated melting of Greenland ice is a clear indication that consequences of global warming are real and impending. The underlying causes of global warming are well enough understood, but the necessary reduction of greenhouse gases to prevent irreversible climate change is unlikely to happen before the point of no return is reached. To reverse the impending sea level rise, geoengineering counter- measures may be required to counter the current global energy imbalance due to global warming. Of the many proposed remedies, deploying aerosols within the stratosphere offers realistic prospects. Sulfur injections in the lower stratosphere would have the cooling effect of naturally occurring volcanic aerosols. Soot at

4

LACIE—An Application of Meteorology for United States and Foreign Wheat Assessment  

Science Conference Proceedings (OSTI)

The development of a critical world food situation during the early 1970's was the background leading to the Large Area Crop Inventory Experiment (LACIE). The need was to develop a capability for timely monitoring of crops on a global scale. ...

Jerry D. Hill; Norton D. Strommen; Clarence M. Sakamoto; Sharon K. Leduc

1980-01-01T23:59:59.000Z

5

ElectroNeedle  

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

we have also demonstrated that the ElectroNeedle(tm) array can work with existing fluorescent immu- noassays. Figure 7 shows an image of a single ElectroNeedle(tm) tip that has...

6

Dendrite inhibitor  

DOE Patents (OSTI)

An apparatus for removing dendrites or other crystalline matter from the surface of a liquid in a matter transport process, and an electrolytic cell including such an apparatus. A notch may be provided to allow continuous exposure of the liquid surface, and a bore may be further provided to permit access to the liquid. 2 figs.

Miller, W.E.

1988-06-07T23:59:59.000Z

7

Dendrite inhibitor  

DOE Patents (OSTI)

An apparatus for removing dendrites or other crystalline matter from the surface of a liquid in a matter transport process, and an electrolytic cell including such an apparatus. A notch may be provided to allow continuous exposure of the liquid surface, and a bore may be further provided to permit access to the liquid.

Miller, William E. (Naperville, IL)

1989-01-01T23:59:59.000Z

8

ElectroNeedle  

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

ElectroNeedle ElectroNeedle  (tm) Biomedical Sensor Array 2007 R&D 100 Award Entry Form ElectroNeedle  (tm) Biomedical Sensor Array Sandia National Laboratories PO Box 5800, MS 1425 Albuquerque, NM 87185-1425 USA Stephen Casalnuovo (505) 844-6097 (505) 844-1198 (Fax) sacasal@sandia.gov AFFIRMATION: I affirm that all information submitted as a part of, or supplemental to, this entry is a fair and accurate represen- tation of this product. (Signature)______________________________________ Not applicable ElectroNeedle(tm) Biomedical Sensor Array The ElectroNeedle(tm) Biomedical Sensor Array is a device that, when pressed against the skin, can make rapid, multiplexed diagnostic measurements in a point-of-care setting. Technology research and development matured to a point

9

Dendritic Subunits Determined by Dendritic Morphology  

Science Conference Proceedings (OSTI)

A theoretical framework is presented in which arbitrarily branched dendritic structures with nonhomogeneous membrane properties and nonuniform geometry can be transformed into an equivalent unbranched structure (equivalent cable). Rall's equivalent cylinder ...

K. A. Lindsay; J. M. Ogden; J. R. Rosenberg

2001-11-01T23:59:59.000Z

10

Dendrite Arm Spacing  

Science Conference Proceedings (OSTI)

...Casting processes Cooling rate Dendrite arm spacing °C/s °F/s ÎĽm mils Plaster, investment 1 1.80 100â??1000 3.94â??39.4 Green sand, shell 10 18.0 50â??500 1.97â??19.7 Permanent mold 100 180.0 30â??70 1.18â??2.76 Die 1000 1800 5â??15 0.20â??0.59...

11

Geothermometry At The Needles Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Geothermometry At The Needles Area (DOE GTP) Exploration Activity Details Location The Needles Area Exploration Technique Geothermometry Activity Date Usefulness not indicated...

12

Observation Wells At The Needles Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

Observation Wells At The Needles Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Observation Wells At The Needles Area (DOE GTP)...

13

Development Wells At The Needles Area (DOE GTP) | Open Energy...  

Open Energy Info (EERE)

The Needles Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Development Wells At The Needles Area (DOE GTP) Exploration Activity...

14

Selectivity and Stability via Dendritic Nonlinearity  

Science Conference Proceedings (OSTI)

Inspired by recent studies regarding dendritic computation, we constructed a recurrent neural network model incorporating dendritic lateral inhibition. Our model consists of an input layer and a neuron layer that includes excitatory cells and an inhibitory ...

Kenji Morita; Masato Okada; Kazuyuki Aihara

2007-07-01T23:59:59.000Z

15

Dendrite Growth Prevention Technology for Lithium Metal ...  

Search PNNL. PNNL Home; About; Research; Publications; Jobs; News; Contacts; Dendrite Growth Prevention Technology for Lithium Metal Batteries. ...

16

Iris Recognition Report Evaluates 'Needle in Haystack' Search ...  

Science Conference Proceedings (OSTI)

Iris Recognition Report Evaluates 'Needle in Haystack' Search Capability. From NIST Tech Beat: April 17, 2012. ...

2012-04-17T23:59:59.000Z

17

Intradermal needle-free powdered drug injection  

E-Print Network (OSTI)

This thesis presents a new method for needle-free powdered drug injection. The design, construction, and testing of a bench-top helium-powered device capable of delivering powder to controllable depths within the dermis ...

Liu, John (John Hsiao-Yung)

2012-01-01T23:59:59.000Z

18

Method of inhibiting dislocation generation in silicon dendritic webs  

DOE Patents (OSTI)

A method of tailoring the heat balance of the outer edge of the dendrites adjacent the meniscus to produce thinner, smoother dendrites, which have substantially less dislocation sources contiguous with the dendrites, by changing the view factor to reduce radiation cooling or by irradiating the dendrites with light from a quartz lamp or a laser to raise the temperature of the dendrites.

Spitznagel, John A. (Export, PA); Seidensticker, Raymond G. (Forest Hills, PA); McHugh, James P. (Wilkins Township, Allegheny County, PA)

1990-11-20T23:59:59.000Z

19

Medically relevant ElectroNeedle technology development.  

DOE Green Energy (OSTI)

ElectroNeedles technology was developed as part of an earlier Grand Challenge effort on Bio-Micro Fuel Cell project. During this earlier work, the fabrication of the ElectroNeedles was accomplished along with proof-of-concept work on several electrochemically active analytes such as glucose, quinone and ferricyanide. Additionally, earlier work demonstrated technology potential in the field of immunosensors by specifically detecting Troponin, a cardiac biomarker. The current work focused upon fabrication process reproducibility of the ElectroNeedles and then using the devices to sensitively detect p-cresol, a biomarker for kidney failure or nephrotoxicity. Valuable lessons were learned regarding fabrication assurance and quality. The detection of p-cresol was accomplished by electrochemistry as well as using fluorescence to benchmark ElectroNeedles performance. Results from these studies will serve as a guide for the future fabrication processes involving ElectroNeedles as well as provide the groundwork necessary to expand technology applications. One paper has been accepted for publication acknowledging LDRD funding (K. E. Achyuthan et al, Comb. Chem. & HTS, 2008). We are exploring the scope for a second paper describing the applications potential of this technology.

Schmidt, Carrie Frances; Thomas, Michael Loren; McClain, Jaime L.; Harper, Jason C.; Achyuthan, Komandoor E.; Ten Eyck, Gregory A.

2008-11-01T23:59:59.000Z

20

The Needles Geothermal Area | Open Energy Information  

Open Energy Info (EERE)

The Needles Geothermal Area The Needles Geothermal Area Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermal Resource Area: The Needles Geothermal Area Contents 1 Area Overview 2 History and Infrastructure 3 Regulatory and Environmental Issues 4 Exploration History 5 Well Field Description 6 Geology of the Area 7 Geofluid Geochemistry 8 NEPA-Related Analyses (0) 9 Exploration Activities (15) 10 References Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"TERRAIN","zoom":6,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"300px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.15,"lon":-119.68,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Primary Dendrite Array Morphology: Observations from Ground ...  

Science Conference Proceedings (OSTI)

Abstract Scope, Influence of natural convection on primary dendrite array ... Solidification and Microstructure Evaluation of the Ni-Ga and Co-Ni-Ga Alloys.

22

Spectral identification of ozone-damaged pine needles  

Science Conference Proceedings (OSTI)

Needles were collected from ponderosa and Jeffrey pine trees at three sites in the Sierra Nevada, and were assembled into 504 samples and grouped according to five dominant live needle conditions-green, winter fleck, sucking insect damage, scale insect ...

A. V. Di Vittorio; G. S. Biging

2009-01-01T23:59:59.000Z

23

The Needles Geothermal Area | Open Energy Information  

Open Energy Info (EERE)

The Needles Geothermal Area The Needles Geothermal Area (Redirected from The Needles Area) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Geothermal Resource Area: The Needles Geothermal Area Contents 1 Area Overview 2 History and Infrastructure 3 Regulatory and Environmental Issues 4 Exploration History 5 Well Field Description 6 Geology of the Area 7 Geofluid Geochemistry 8 NEPA-Related Analyses (0) 9 Exploration Activities (15) 10 References Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"TERRAIN","zoom":6,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"300px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.15,"lon":-119.68,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

24

Multispectral Imaging At The Needles Area (Laney, 2005) | Open Energy  

Open Energy Info (EERE)

Needles Area (Laney, 2005) Needles Area (Laney, 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Multispectral Imaging At The Needles Area (Laney, 2005) Exploration Activity Details Location The Needles Area Exploration Technique Multispectral Imaging Activity Date Usefulness useful DOE-funding Unknown Notes Remote Sensing for Exploration and Mapping of Geothermal Resources, Wendy Calvin, 2005. Task 1: Detailed analysis of hyperspectral imagery obtained in summer of 2003 over Brady's Hot Springs region was completed and validated (Figure 1). This analysis provided a local map of both sinter and tufa deposits surrounding the Ormat plant, identified fault extensions not previously recognized from field mapping and has helped constrain where to

25

Modeling-Computer Simulations At The Needles Area (Bell & Ramelli...  

Open Energy Info (EERE)

Login | Sign Up Search Page Edit History Facebook icon Twitter icon Modeling-Computer Simulations At The Needles Area (Bell & Ramelli, 2009) Jump to: navigation, search...

26

Assembly of a Molecular Needle, from the Bottom Up  

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

Assembly of a Molecular Needle, from the Bottom Up Print Many pathogenic bacteria use a specialized secretion system to inject virulence proteins directly into the cells they...

27

*** CANCELED *** SCIENCE ON SATURDAY- "Finding a Needle in A...  

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

*** SCIENCE ON SATURDAY- "Finding a Needle in A (Genomic) Haystack or How Can Computers Help Cure Cancer" Professor Olga G. Troyanskaya Lewis-Sigler Institute for...

28

Flow Test At The Needles Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

Flow Test At The Needles Area (DOE GTP) Exploration Activity Details Location The Needles Area Exploration Technique Flow Test Activity Date Usefulness not indicated DOE-funding...

29

Acoustic Logs At The Needles Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

The Needles Area (DOE GTP) Exploration Activity Details Location The Needles Area Exploration Technique Acoustic Logs Activity Date Usefulness not indicated DOE-funding Unknown...

30

Field Mapping At The Needles Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

The Needles Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Field Mapping At The Needles Area (DOE GTP) Exploration Activity...

31

Adsorptive removal of nitrogen from coal-based needle coke feedstocks using activated carbon.  

E-Print Network (OSTI)

??A low percentage of nitrogen in needle coke feedstocks is desired for the reduction of puffing during the process of graphitization of needle coke. The… (more)

Madala, Sreeja.

2009-01-01T23:59:59.000Z

32

Apparatus for growing a dendritic web  

DOE Patents (OSTI)

A melt system including a susceptor-crucible assembly having improved gradient control when melt replenishment is used during dendritic web growth. The improvement lies in the formation of a thermal barrier in the base of the receptor which is in the form of a vertical slot in the region of the susceptor underlying the crucible at the location of a compartmental separator dividing the crucible into a growth compartment and a melt replenishment compartment. The result achieved is a step change in temperature gradient in the melt thereby providing a more uniform temperature in the growth compartment from which the dendritic web is drawn.

Duncan, Charles S. (Pittsburgh, PA); Piotrowski, Paul A. (Monroeville, PA); Skutch, Maria E. (Trafford, PA); McHugh, James P. (Pittsburgh, PA)

1983-06-21T23:59:59.000Z

33

Needle-free drug delivery using shock wave techniques  

E-Print Network (OSTI)

A recent advancement in the area of needle-free injection systems has been the development of devices capable of epidermal delivery of powder medications. These devices use high-pressure compressed gas to accelerate drug ...

Pavlov, Atanas (Atanas Ivanov)

2006-01-01T23:59:59.000Z

34

Assembly of a Molecular Needle, from the Bottom Up  

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

Assembly of a Molecular Needle, Assembly of a Molecular Needle, from the Bottom Up Assembly of a Molecular Needle, from the Bottom Up Print Wednesday, 21 December 2005 00:00 Many pathogenic bacteria use a specialized secretion system to inject virulence proteins directly into the cells they infect. The injected proteins, by mimicking host-cell mechanisms, can then subvert normal cellular function. The type III secretion system (TTSS) is a sophisticated protein complex with an overall shape similar to a hypodermic needle. More than twenty unique types of proteins are required for its assembly, most of which are found among a wide variety of animal as well as plant pathogens. Electron microscopy has sketched the broad outlines of TTSS structure, but it does not have sufficient resolution to reveal the details required to understand, and eventually inhibit, the needle's function. At the ALS, researchers from Canada and the U.S. performed crystallographic studies of EscJ, the protein that makes up the needle's ring-shaped base. Their analysis of the EscJ ring not only presents a snapshot of one of the earliest structures generated in the TTSS assembly process, but also reveals features indicative of its role as the molecular platform for subsequent construction of the secretion apparatus.

35

Lid for improved dendritic web growth  

DOE Patents (OSTI)

A lid for a susceptor in which a crystalline material is melted by induction heating to form a pool or melt of molten material from which a dendritic web of essentially a single crystal of the material is pulled through an elongated slot in the lid and the lid has a pair of generally round openings adjacent the ends of the slot and a groove extends between each opening and the end of the slot. The grooves extend from the outboard surface of the lid to adjacent the inboard surface providing a strip contiguous with the inboard surface of the lid to produce generally uniform radiational heat loss across the width of the dendritic web adjacent the inboard surface of the lid to reduce thermal stresses in the web and facilitate the growth of wider webs at a greater withdrawal rate.

Duncan, Charles S. (Penn Hills, PA); Kochka, Edgar L. (Greentree, PA); Piotrowski, Paul A. (Monroeville, PA); Seidensticker, Raymond G. (Forest Hills, PA)

1992-03-24T23:59:59.000Z

36

Large Scale Parallel Lattice Boltzmann Model of Dendritic Growth  

Science Conference Proceedings (OSTI)

Abstract Scope, We present a parallel lattice Boltzmann - cellular automaton model for the simulation of two-dimensional dendritic growth during solidification of ...

37

Combined Phase Field – Lattice Boltzmann Simulation of Dendritic ...  

Science Conference Proceedings (OSTI)

Presentation Title, Combined Phase Field – Lattice Boltzmann Simulation of Dendritic Solidification with Fluid Flow and Solid Particle Motion. Author(s), Dmitry ...

38

Characterization of the Dendritic Microstructure of Investment Cast ...  

Science Conference Proceedings (OSTI)

CHARACTERIZATION OF THE DENDRITIC MICROSTRUCTURE. OF INVESTMENT CAST ALLOY 718. Y.K. Ko and J.T. Berry. Department of Metallurgical and.

39

New Model Predicts Dendrite Formation in Li-Ion Batteries  

Science Conference Proceedings (OSTI)

Mar 28, 2013 ... The dendrites are lithium deposits that form on electrode surfaces that can potentially cause an internal short circuit, resulting in battery failure ...

40

Fabrication of Solid Electrolyte Dendrites for Solid Oxide Fuel Cell ...  

Science Conference Proceedings (OSTI)

Fabrication of Solid Electrolyte Dendrites for Solid Oxide Fuel Cell Miniaturizations · Fabrication of TiN Nanoparticle Dispersed Si3N4 Ceramics by Wet Jet ...

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Development of Type 1 Diabetes: Monocytes and dendritic cells in the pancreas.  

E-Print Network (OSTI)

??This thesis focuses on the presence of precursors for dendritic cells and the characterization of dendritic cell subsets in the normal pancreas in mice and… (more)

Welzen-Coppens, J.M.C.

2013-01-01T23:59:59.000Z

42

A Lorentz-force actuated controllable needle-free drug delivery system  

E-Print Network (OSTI)

The advantages of delivering injections via needle-free methods are numerous. However, conventional methods for needle-free injection lack sufficient control over depth of penetration and shape of injection. Thus, a ...

Hemond, Brian D. (Brian David Thomson)

2004-01-01T23:59:59.000Z

43

Experimental analysis of stove top designs for pine needle combustion in a semi-gasifier burner  

E-Print Network (OSTI)

The motivation behind this project was to develop a better understanding of the role that the stove top plays in a stove where pine needles are the main fuel source. Pine needles have distinct characteristics in their ...

Roqué, Alyssa J

2011-01-01T23:59:59.000Z

44

Characteristics of pine needle combustion in a semi-gasifier burner  

E-Print Network (OSTI)

The motivation behind this report was to develop a stronger understanding of pine needle combustion behavior in a semi-gasifier, in order to ultimately design an effective pine needle cook stove for people in the developing ...

Fang, Liane Jessica

2011-01-01T23:59:59.000Z

45

Effects of insertion speed and trocar stiffness on the accuracy of needle position for brachytherapy  

Science Conference Proceedings (OSTI)

Purpose: In prostate brachytherapy, accurate positioning of the needle tip to place radioactive seeds at its target site is critical for successful radiation treatment. During the procedure, needle deflection leads to seed misplacement and suboptimal radiation dose to cancerous cells. In practice, radiation oncologists commonly use high-speed hand needle insertion to minimize displacement of the prostate as well as the needle deflection. Effects of speed during needle insertion and stiffness of trocar (a solid rod inside the hollow cannula) on needle deflection are studied. Methods: Needle insertion experiments into phantom were performed using a 2{sup 2} factorial design (2 parameters at 2 levels), with each condition having replicates. Analysis of the deflection data included calculating the average, standard deviation, and analysis of variance (ANOVA) to find significant single and two-way interaction factors. Results: The stiffer tungsten carbide trocar is effective in reducing the average and standard deviation of needle deflection. The fast insertion speed together with the stiffer trocar generated the smallest average and standard deviation for needle deflection for almost all cases. Conclusions: The combination of stiff tungsten carbide trocar and fast needle insertion speed are important to decreasing needle deflection. The knowledge gained from this study can be used to improve the accuracy of needle insertion during brachytherapy procedures.

McGill, Carl S.; Schwartz, Jonathon A.; Moore, Jason Z.; McLaughlin, Patrick W.; Shih, Albert J. [Biomedical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 (United States); Department of Mechanical and Nuclear Engineering, The Pennsylvania State University, State College, Pennsylvania 16802 (United States); Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan 48109 (United States); Biomedical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 and Mechanical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2012-04-15T23:59:59.000Z

46

An interactive high-fidelity haptic needle simulator with GPU acceleration  

Science Conference Proceedings (OSTI)

Needle operation is one of the fundamental operations in many surgeries such as acupuncture, liver biopsy and anesthesia. During such procedure, the haptic perception is especially important for surgeons to manipulate the needles. In this paper, a simulator ... Keywords: deformation solver based on GPU, haptic needle model, tissues identification

Ji-Shuai Zhang; Hui Chen; Wen Wu; Pheng-Ann Heng

2010-12-01T23:59:59.000Z

47

CYTOPATHOLOGY Indeterminate Fine-Needle Aspiration of the Breast  

E-Print Network (OSTI)

of Wisconsin (Xcyt) was used to categorize 56 (37 benign and 19 Hospitals and Clinics, Iowa City, Iowa of three nuclear features of Wisconsin, Madison, Wisconsin. (area, texture, and smoothness), the Xcyt-needle aspiration, image analysis, cytology, machine learn-Initially presented at the United States and Ca- nadian

Street, Nick

48

The effects of diesel injector needle motion on spray structure.  

Science Conference Proceedings (OSTI)

The internal structure of diesel fuel injectors is known to have a significant impact on the steady-state fuel distribution within the spray. However, little experimental or computational work has been performed on the dynamics of fuel injectors. Recent studies have shown that it is possible to measure the three-dimensional geometry of the injector nozzle, and to track changes in that geometry as the needle opens and closes in real time. This has enabled the dynamics of the injector to be compared with the dynamics of the spray, and allows computational fluid dynamics (CFD) simulations to use realistic time-dependent flow passage geometries. In this study, X-ray phase-enhanced imaging has been used to perform time-resolved imaging of the needle seat area in several common-rail diesel injection nozzles. The fuel distributions of the sprays emitted by these injectors were also studied with fast X-ray radiography. Correlations between eccentric motions of the injector needle valve and oscillations in the fuel density as it emerges from the nozzle are examined. CFD modeling is used to interpret the effect of needle motion on fuel flow.

Powell, C. F.; Kastengren, A. L.; Liu, Z.; Fezzaa, K. (Energy Systems); ( XSD)

2011-01-01T23:59:59.000Z

49

Precision grid and hand motion for accurate needle insertion in brachytherapy  

Science Conference Proceedings (OSTI)

Purpose: In prostate brachytherapy, a grid is used to guide a needle tip toward a preplanned location within the tissue. During insertion, the needle deflects en route resulting in target misplacement. In this paper, 18-gauge needle insertion experiments into phantom were performed to test effects of three parameters, which include the clearance between the grid hole and needle, the thickness of the grid, and the needle insertion speed. Measurement apparatus that consisted of two datum surfaces and digital depth gauge was developed to quantify needle deflections. Methods: The gauge repeatability and reproducibility (GR and R) test was performed on the measurement apparatus, and it proved to be capable of measuring a 2 mm tolerance from the target. Replicated experiments were performed on a 2{sup 3} factorial design (three parameters at two levels) and analysis included averages and standard deviation along with an analysis of variance (ANOVA) to find significant single and two-way interaction factors. Results: Results showed that grid with tight clearance hole and slow needle speed increased precision and accuracy of needle insertion. The tight grid was vital to enhance precision and accuracy of needle insertion for both slow and fast insertion speed; additionally, at slow speed the tight, thick grid improved needle precision and accuracy. Conclusions: In summary, the tight grid is important, regardless of speed. The grid design, which shows the capability to reduce the needle deflection in brachytherapy procedures, can potentially be implemented in the brachytherapy procedure.

McGill, Carl S.; Schwartz, Jonathon A.; Moore, Jason Z.; McLaughlin, Patrick W.; Shih, Albert J. [Biomedical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 (United States); Mechanical Engineering Department, University of Michigan, Ann Arbor, Michigan 48109 (United States); Department of Radiation Oncology, University of Michigan, Ann Arbor, Michigan 48109 (United States); Biomedical Engineering and Mechanical Engineering Departments, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2011-08-15T23:59:59.000Z

50

Dendritic Patterns in Tropical Cumulus: An Observational Analysis  

Science Conference Proceedings (OSTI)

An observational analysis of the structure and synoptic setting of tropical dendritic cumulus formations was undertaken using 30 months of global data from the Moderate Resolution Imaging Spectroradiometer aboard the National Aeronautics and ...

Stephen D. Nicholls; George S. Young

2007-05-01T23:59:59.000Z

51

OSTI, US Dept of Energy, Office of Scientific and Technical Information |  

Office of Scientific and Technical Information (OSTI)

Princeton Plasma Physics Laboratory Topic Princeton Plasma Physics Laboratory Topic Snowflake Science by Kate Bannan 13 Dec, 2011 in Science Communications snowflake With winter just around the corner, can snow be far behind? We've all heard that no two snowflakes are alike, but what do we really know about them? Snowflakes always have six sides. Their form and shape depends on temperature and moisture. Snowflake shapes fall into six main categories: plate (flat), column, stars, dendrite (lacy), needle and capped column. When it is extremely cold, snow becomes fine and powdery and the snowflakes' design becomes simpler, usually needle or rod shaped. When the temperature is close to freezing point, snowflakes become much larger and more complex in design. Related Topics: Princeton Plasma Physics Laboratory, Science Accelerator, snowflake, tokamak

52

OSTI, US Dept of Energy, Office of Scientific and Technical Information |  

Office of Scientific and Technical Information (OSTI)

Snowflake Science Snowflake Science by Kate Bannan on Tue, 13 Dec, 2011 snowflake With winter just around the corner, can snow be far behind? We've all heard that no two snowflakes are alike, but what do we really know about them? Snowflakes always have six sides. Their form and shape depends on temperature and moisture. Snowflake shapes fall into six main categories: plate (flat), column, stars, dendrite (lacy), needle and capped column. When it is extremely cold, snow becomes fine and powdery and the snowflakes' design becomes simpler, usually needle or rod shaped. When the temperature is close to freezing point, snowflakes become much larger and more complex in design. Snow crystals form in clouds when the temperature is below freezing and are created by water droplets freezing on small ice particles. As an ice

53

OSTI, US Dept of Energy, Office of Scientific and Technical Information |  

Office of Scientific and Technical Information (OSTI)

tokamak Topic tokamak Topic Snowflake Science by Kate Bannan 13 Dec, 2011 in Science Communications snowflake With winter just around the corner, can snow be far behind? We've all heard that no two snowflakes are alike, but what do we really know about them? Snowflakes always have six sides. Their form and shape depends on temperature and moisture. Snowflake shapes fall into six main categories: plate (flat), column, stars, dendrite (lacy), needle and capped column. When it is extremely cold, snow becomes fine and powdery and the snowflakes' design becomes simpler, usually needle or rod shaped. When the temperature is close to freezing point, snowflakes become much larger and more complex in design. Related Topics: Princeton Plasma Physics Laboratory, Science Accelerator, snowflake, tokamak

54

OSTI, US Dept of Energy, Office of Scientific and Technical Information |  

Office of Scientific and Technical Information (OSTI)

snowflake Topic snowflake Topic Snowflake Science by Kate Bannan 13 Dec, 2011 in Science Communications snowflake With winter just around the corner, can snow be far behind? We've all heard that no two snowflakes are alike, but what do we really know about them? Snowflakes always have six sides. Their form and shape depends on temperature and moisture. Snowflake shapes fall into six main categories: plate (flat), column, stars, dendrite (lacy), needle and capped column. When it is extremely cold, snow becomes fine and powdery and the snowflakes' design becomes simpler, usually needle or rod shaped. When the temperature is close to freezing point, snowflakes become much larger and more complex in design. Related Topics: Princeton Plasma Physics Laboratory, Science Accelerator, snowflake, tokamak

55

Final Report for Organic Partitioning Resulting from Operation of an INTEC Double-needle Sampler  

SciTech Connect

The double needle sampler testing is a continuation of previous test series that investigated the fate of organic species in the Process Equipment Waste Evaporator (PEWE) system at the Idaho Nuclear Technology and Engineering Center (INTEC). This test series was designed to investigate the effects of operation of the double needle sampling systems on volatile organic constituents in an acidic feed matrix.

Michael B. Heiser

2003-09-01T23:59:59.000Z

56

Noncrystallographic calcite dendrites from hot-spring deposits at Lake Bogoria, Kenya  

Science Conference Proceedings (OSTI)

Complex calcite crystals are an integral component of precipitates that form around the orifices of the Loburu and Mawe Moto hot springs on the shores of Lake bogoria, Kenya. Two types of large (up to 4 cm long) noncrystallographic dendrites are important components of these deposits. Feather dendrites are characterized by multiple levels of branching with individual branches developed through crystal splitting and spherulitic growth. Scandulitic (from Latin meaning shingle) dendrites are formed of stacked calcite crystals and are generally more compact than feather dendrites. These developed through the incremental stacking of rectangular-shaped calcite crystals that initially grew as skeletal crystals. Feather and scandulitic dendrites precipitated from the same waters in the same springs. The difference in morphology is therefore related to microenvironments in which they grew. Feather dendrites grew in any direction in pools of free-standing water provided that they were in constant contact with the solute. Conversely, scandulitic dendrites grew on rims of dams where water flowed over the surface in concert with the pulses of spring water. Thus, each calcite crystal in these dendrites represents one episode of crystal growth. The orientation of the component crystals in scandulitic dendrites is controlled by the topography of the dam or surface, not crystallographic criteria. The noncrystallographic dendrites formed from spring waters with initial temperatures of 90--99 C. Surficial water cooling, loss of CO{sub 2}, and presence of other elements that can interfere with crystal growth contributed to the formation of these unusual crystals.

Jones, B. [Univ. of Alberta, Edmonton, Alberta (Canada). Dept. of Geology; Renaut, R.W. [Univ. of Saskatchewan, Saskatoon (Canada). Dept. of Geological Sciences

1995-01-02T23:59:59.000Z

57

Multispectral Imaging At The Needles Area (Kratt, Et Al., 2005) | Open  

Open Energy Info (EERE)

Multispectral Imaging At The Needles Area (Kratt, Et Al., 2005) Multispectral Imaging At The Needles Area (Kratt, Et Al., 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Multispectral Imaging At The Needles Area (Kratt, Et Al., 2005) Exploration Activity Details Location The Needles Area Exploration Technique Multispectral Imaging Activity Date Usefulness not indicated DOE-funding Unknown Notes Over 2000 km2 of 5-m resolution Hymap hyperspectral data was acquired in 2004. Subsequent image processing and data analysis has identified reflectance spectra for alunite, kaolinite/halloysite, illite, gypsum, vegetation, and carbonate. A portable spectrometer is being used for in situ validation, along with laboratory measurements and x-ray diffraction analyses of samples collected in teh field. We are in the process of

58

Rock Sampling At The Needles Area (Kratt, Et Al., 2005) | Open Energy  

Open Energy Info (EERE)

The Needles Area (Kratt, Et Al., 2005) The Needles Area (Kratt, Et Al., 2005) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Rock Sampling At The Needles Area (Kratt, Et Al., 2005) Exploration Activity Details Location The Needles Area Exploration Technique Rock Sampling Activity Date Usefulness not indicated DOE-funding Unknown Notes Over 2000 km2 of 5-m resolution Hymap hyperspectral data was acquired in 2004. Subsequent image processing and data analysis has identified reflectance spectra for alunite, kaolinite/halloysite, illite, gypsum, vegetation, and carbonate. A portable spectrometer is being used for in situ validation, along with laboratory measurements and x-ray diffraction analyses of samples collected in teh field. We are in the process of producing and validating mineral maps that will be used to narrow the scope

59

Resistivity Log At The Needles Area (DOE GTP) | Open Energy Information  

Open Energy Info (EERE)

source source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit History Facebook icon Twitter icon » Resistivity Log At The Needles Area (DOE GTP) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Single-Well and Cross-Well Resistivity At The Needles Area (DOE GTP) Exploration Activity Details Location The Needles Area Exploration Technique Single-Well and Cross-Well Resistivity Activity Date Usefulness not indicated DOE-funding Unknown References (1 January 2011) GTP ARRA Spreadsheet Retrieved from "http://en.openei.org/w/index.php?title=Resistivity_Log_At_The_Needles_Area_(DOE_GTP)&oldid=689880" Categories: Exploration Activities

60

Controllable needle-free injection : development and verification of a novel device  

E-Print Network (OSTI)

Current needle-free injection technology is based on actuation via compressed springs or gas. These devices are not easy to modify for different depths of injections. This thesis describes the design and verification of a ...

Wendell, Dawn M. (Dawn Marie), 1983-

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Design and characterization of a compact voice coil for a needle-free injection device  

E-Print Network (OSTI)

Conventional needle-free injection (NFI) devices are driven by a pressure source generated by either a compressed spring mechanism or compressed inert gas, which have fixed injection (pressure versus time) profiles. The ...

Lui, Diana, S.B. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

62

Multimodal spectroscopy : real-time diagnosis of breast cancer during core needle biopsy  

E-Print Network (OSTI)

Early detection of breast cancer is critical for improved survival. Currently, breast abnormalities are diagnosed based on a histopathological evaluation of tissue removed during core needle biopsy. Microcalcifications are ...

Volynskaya, Zoya I

2010-01-01T23:59:59.000Z

63

Hydrodesulfurization of Fluid Catalytic Cracking Decant Oils for the Production of Low-sulfur Needle Coke Feedstocks.  

E-Print Network (OSTI)

??Needle coke, produced by the delayed coking of fluid catalytic cracking decant oils, is the primary filler used in the production of graphite electrodes. The… (more)

Wincek, Ronald

2013-01-01T23:59:59.000Z

64

Inhibition of Lithium Dendrites by Fumed Silica-Based Composite Electrolytes  

E-Print Network (OSTI)

Inhibition of Lithium Dendrites by Fumed Silica-Based Composite Electrolytes Xiang-Wu Zhang State University, Raleigh, North Carolina 27695-7905, USA Lithium dendrite formation is investigated via in situ microscopy in a liquid electrolyte containing polyethylene glycol dimethyl ether lithium bis

Khan, Saad A.

65

Research note Direct shoot organogenesis from needles of three genotypes of Sequoia  

E-Print Network (OSTI)

Research note Direct shoot organogenesis from needles of three genotypes of Sequoia sempervirens. Don.) Endl., direct shoot organogenesis was induced. The effects of three genotypes and two cytokinins organogenesis from all three genotypes tested. Adventitious shoots were induced directly from explants without

Korban, Schuyler S.

66

Supplementary Material1 "The Atmospheric Potential of Biogenic Volatile Organic Compounds from Needles of2  

E-Print Network (OSTI)

Needles of2 White Pine (Pinus strobus) in Northern Michigan" by Toma and Bertman3 4 Table S1: Parameters. The retention time and8 mass spectrum of -phellandrene were obtained using Angelica seed oil (Shiono Koryo9 and -cadinene were identified using Hinoki essential oil12 (Shiono Koryo Kaisha, Ltd.). Germacrene-D-4-ol

Meskhidze, Nicholas

67

Experience-dependent dendrite remodeling of GABAergic interneurons in the adult visual cortex  

E-Print Network (OSTI)

An ever increasing amount of evidence is demonstrating that structural plasticity is a diverse and ongoing feature that contributes to plasticity in the adult brain. It was previously shown that dendritic arbors of inhibitory ...

Chen, Jerry L

2010-01-01T23:59:59.000Z

68

Synthesis of a hydrogel-based vaccine to mimic dendritic cell responses to pathogens  

E-Print Network (OSTI)

Live or attenuated pathogens are the basis of many successful vaccines due in part to the orchestrated response of dendritic cells (DCs) triggered by these immunizations, which includes (1) DC and DC precursor attraction ...

Jain, Siddhartha, Ph. D. Massachusetts Institute of Technology

2006-01-01T23:59:59.000Z

69

Effects of 810-nm Laser on Murine Bone-Marrow-Derived Dendritic Cells  

E-Print Network (OSTI)

Objective: The purpose of this study was to Investigate the effect of 810-nm low level laser therapy (LLLT) on dendritic cells (DC) in vitro. Background data: LLLT can enhance wound healing and increase cell proliferation ...

Chen, Aaron Chih-Hao

70

Web-dendritic ribbon growth. Annual report, October 1, 1975--September 31, 1976  

DOE Green Energy (OSTI)

The web furnace has been set up, calibrated, and made operational for pulling dendritic-web samples. Considerable work has been completed in the investigation of the effect of changes in the furnace thermal geometry, as accomplished by variations in the number, size, shape, and location of thermal shields, on the growth of dendritic-web. Numerous growth runs were made to grow primitive dendrites for use as the dendritic seed crystals for the web growth. Some preliminary investigations were conducted to try and determine the optimum twin spacing in the dendritic seed crystal for web growth. Models were developed and computer programs applied to ascertain the thermal geometries present in the susceptor, crucible melt, meniscus, and web. A major result of this analysis has been the prediction of an upper limit on the pull rate of approximately 4 cms. per minute with the thermal geometry presented in our furnace. The facilities for obtaining characterization data were set-up and made operational. Data on twin spacings and number of twin planes in the dendritic seed crystals and resulting web samples was obtained. Resistivity and majority charge carrier type determinations were made on a few select web samples. All samples to date have been high resistivity, undoped, p-type. (WDM)

Hilborn, Jr., R. B.; Faust, Jr., J. W.

1976-10-01T23:59:59.000Z

71

Dendritic cells are accessory cells for the development of anti-trinitrophenyl cytotoxic T lymphocytes  

E-Print Network (OSTI)

The adherent cell population from mouse spleen is a heterogeneous collection of cells that includes mononuclear phagocytes and a novel entity, the dendritic cell. As reviewed recently (1), dendritic ceils and macrophages differ in many important respects, including their structure at the light and electron microscopic level, endocytic activity, behavior in in vitro systems, life history and phylogeny, and surface antigens and receptors. It is now possible to separate dendritic cells and macrophages from complex parenchymal mixtures, to monitor the purity of the preparations, and to cultivate each cell type for prolonged periods in a tissue culture environment. With the availability of the above techniques, it has been possible to evaluate the separate roles of dendritic cells and macrophages in the induction of immune responses. We have reported that dendritic cells serve as powerful stimulators of both the allogeneic and syngeneic mixed leukocyte reactions (MLR),I whereas macrophages (Mth) are either weak or inactive (2-4). We now compare the accessory cell function of dendritic cells (DC) and Mth, specifically their ability to support the generation of anti-trinitrophenol (TNP) cytotoxic T lymphocytes (CTL) in a primary in vitro response. The evidence will show that DC are the critical accessory cells, whereas M~b, regardless of source or expression of Ia antigen, are without significant activity. Mth, however, can serve as potent inhibitors of the DC-dependent production of CTL via an indomethacin-sensitive mechanism.

C. Nussenzweig; Ralph M. Steinman; Bodma Gutchinov; Zanvil; A. Cohn; Cell Preparations

1980-01-01T23:59:59.000Z

72

Au-Pt heteroaggregate dendritic nanostructures and Au-Pt alloy nanoparticles and their use as catalysts  

DOE Patents (OSTI)

Au--Pt heteroaggregate dendritic nanostructures and AuPt alloy nanoparticles, and their use as anodic catalysts in fuel cells.

Eichhorn, Bryan W. (University Park, MD); Zhou, Shenghu (Greenbelt, MD); Jackson, Gregory Scott (University Park, MD)

2011-10-18T23:59:59.000Z

73

2-M Probe At The Needles Area (Kratt, Et Al., 2010) | Open Energy  

Open Energy Info (EERE)

Kratt, Et Al., 2010) Kratt, Et Al., 2010) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: 2-M Probe At The Needles Area (Kratt, Et Al., 2010) Exploration Activity Details Location The Needles Area Exploration Technique 2-M Probe Activity Date Usefulness useful DOE-funding Unknown Notes "A new geothermal system was identified from 2m measurements at Emerson Pass on the Pyramid Lake Paiute Reservation in Washoe County, Nevada. This narrow NNW-trending valley contains several faults that appear to transfer dextral strain from NW-striking faults in the northern Walker Lane to N-NNW striking normal faults in the Smoke Creek Desert. The thermal anomaly extends for at least 3 km parallel to the range-front fault that defines the east side of the Emerson Pass valley. A maximum temperature of 35°C

74

Dendritic functionalization of monolayer-protected gold nanoparticles  

SciTech Connect

This paper describes the facile synthesis of nanoparticle-cored dendrimers (NCDs) and nanoparticle megamers from monolayer-protected gold clusters using either single or multi-step reactions. First, 11-mercaptoundecanoic acid/hexanethiolate-protected gold clusters were synthesized using the Schiffrin reaction followed by the ligand place-exchange reaction. A convergent approach for the synthesis of nanoparticle-cored dendrimers uses a single step reaction that is an ester coupling reaction of hydroxy-functionalized dendrons with carboxylic acid-functionalized gold clusters. A divergent approach, which is based on multi-step reactions, employs the repetition of an amide coupling reaction and a Michael addition reaction to build polyamidoamine dendritic architectures around a nanoparticle core. Nanoparticle megamers, which are large dendrimer-induced nanoparticle aggregates with an average diameter of more than 300 nm, were prepared by the amide coupling reaction between polyamiodoamine [G-2] dendrimers and carboxylic acid-functionalized gold clusters. {sup 1}H NMR spectroscopy, FT-IR spectroscopy, thermogravimetric analysis (TGA), and transmission electron microscopy (TEM) were used for the characterization of these hybrid nanoparticles.

Cutler, Erin C. [Department of Chemistry, Western Kentucky University, Bowling Green, Kentucky 42101 (United States); Lundin, Erik [Department of Chemistry, Western Kentucky University, Bowling Green, Kentucky 42101 (United States); Garabato, B. Davis [Department of Chemistry, Western Kentucky University, Bowling Green, Kentucky 42101 (United States); Choi, Daeock [Department of Chemistry, Sunchon National University, Suncheon 540-742 (Korea, Republic of); Shon, Young-Seok [Department of Chemistry, Western Kentucky University, Bowling Green, Kentucky 42101 (United States)]. E-mail: young.shon@wku.edu

2007-06-05T23:59:59.000Z

75

Dendrite-Free Lithium Deposition via Self-Healing Electrostatic Shield Mechanism  

SciTech Connect

Lithium metal batteries are called the “holy grail” of energy storage systems. However, lithium dendrite growth in these batteries has prevented their practical applications in the last 40 years. Here we show a novel mechanism which can fundamentally change the dendritic morphology of lithium deposition. A low concentration of the second cations (including ions of cesium, rubidium, potassium, and strontium) exhibits an effective reduction potential lower than the standard reduction potential of lithium ions when the chemical activities of these second cations are much lower than that of lithium ions. During lithium deposition, these second cations will form a self-healing electrostatic shield around the initial tip of lithium whenever it is formed. This shield will repel the incoming lithium ions and force them to deposit in the smoother region of the anode so a dendrite-free film is obtained. This mechanism is effective on dendrite prevention in both lithium metal and lithium ion batteries. They may also prevent dendrite growth in other metal batteries and have transformational impact on the smooth deposition in general electrodeposition processes.

Ding, Fei; Xu, Wu; Graff, Gordon L.; Zhang, Jian; Sushko, Maria L.; Chen, Xilin; Shao, Yuyan; Engelhard, Mark H.; Nie, Zimin; Xiao, Jie; Liu, Xingjiang; Sushko, P. V.; Liu, Jun; Zhang, Jiguang

2013-02-28T23:59:59.000Z

76

Multi-Block Enhancement for Lagrangian Dendritic Mesh setup in Altair5  

SciTech Connect

Initial mesh setup for an ASC mUlti-physics code at LANL is done using Altair5. Altair5 assumes that the final mesh is composed of logical structured mesh blocks linked together at mesh boundaries to form, ultimately, an unstructured mesh. Within these blocks, meshes may have dendrites, that is, local regions where two zones share common edges (in two-dimensions, or faces in three-dimensions) with a single zone. In many cases, contiguous subsets of the initial set of blocks may have the same material assigned to them, but without smoothing the mesh would form a computationally challenging initial mesh. Some of these blocks may also have zones with nodes on domain boundaries. This paper reports on the implementation of multiblock smoothing in Altair5, which allows for dendrites and for moving boundary nodes. Dendritic nodes are constrained to be located at the average of their neighbor nodes while boundary nodes are constrained to move along the boundary geometry. Two fundamentally different smoothing methods were implemented. First, a variational principle is presented that balances zonal size and distortion via a user selected weighting with constraints imposed using penalty methods for dendritic nodes and Lagrange multipliers for boundary nodes. Second, the Laplace-Beltrami smoother is presented. This is a general elliptic smoother which can easily be modified to give Laplacian and Winslow-Crowley mesh smoothing. Results are shown for several test meshes of interest.

Douglass, Rodney W [Los Alamos National Laboratory

2010-12-15T23:59:59.000Z

77

Image-Directed Fine-needle Aspiration Biopsy of the Thyroid with Safety-engineered Devices  

SciTech Connect

Purpose: The purpose of the present study was to integrate safety-engineered devices into outpatient fine-needle aspiration (FNA) biopsy of the thyroid in an interventional radiology practice. Materials and Methods: The practice center is a tertiary referral center for image-directed FNA thyroid biopsies in difficult patients referred by the primary care physician, endocrinologist, or otolaryngologist. As a departmental quality of care and safety improvement program, we instituted integration of safety devices into our thyroid biopsy procedures and determined the effect on outcome (procedural pain, diagnostic biopsies, inadequate samples, complications, needlesticks to operator, and physician satisfaction) before institution of safety devices (54 patients) and after institution of safety device implementation (56 patients). Safety devices included a patient safety technology-the mechanical aspirating syringe (reciprocating procedure device), and a health care worker safety technology (antineedlestick safety needle). Results: FNA of thyroid could be readily performed with the safety devices. Safety-engineered devices resulted in a 49% reduction in procedural pain scores (P < 0.0001), a 56% reduction in significant pain (P < 0.002), a 21% increase in operator satisfaction (P < 0.0001), and a 5% increase in diagnostic specimens (P = 0.5). No needlesticks to health care workers or patient injuries occurred during the study. Conclusions: Safety-engineered devices to improve both patient and health care worker safety can be successfully integrated into diagnostic FNA of the thyroid while maintaining outcomes and improving safety.

Sibbitt, Randy R., E-mail: THESIBB2@aol.com; Palmer, Dennis J., E-mail: lyonscreek@aol.com [Montana Interventional and Diagnostic Radiology (United States); Sibbitt, Wilmer L., E-mail: wsibbitt@salud.unm.edu; Bankhurst, Arthur D., E-mail: abankhurst@salud.unm.edu [University of New Mexico Health Sciences Center, Department of Internal Medicine (United States)

2011-10-15T23:59:59.000Z

78

Method of preparing copper-dendritic composite alloys for mechanical reduction  

DOE Patents (OSTI)

Copper-dendritic composite alloys are prepared for mechanical reduction to increase tensile strength by dispersing molten droplets of the composite alloy into an inert gas; solidifying the droplets in the form of minute spheres or platelets; and compacting a mass of the spheres or platelets into an integrated body. The spheres preferably have diameters of from 50 to 2000 .mu.m, and the platelets thicknesses of 100 to 2000 .mu.m. The resulting spheres or platelets will contain ultra-fine dendrites which produce higher strengths on mechanical reduction of the bodies formed therefrom, or comparable strengths at lower reduction values. The method is applicable to alloys of copper with vanadium, niobium, tantalum, chromium, molybdenum, tungsten, iron and cobalt.

Verhoeven, John D. (Ames, IA); Gibson, Edwin D. (Ames, IA); Schmidt, Frederick A. (Ames, IA); Spitzig, William A. (Ames, IA)

1988-01-01T23:59:59.000Z

79

Silicon dendritic web material process development. First quarterly report, March 28-June 30, 1980  

DOE Green Energy (OSTI)

Initial values of pressure, power, and speed have been determined for seam bonding interconnects to dendritic web solar cells. Satisfactory bond strengths and high yield have been achieved without cell damage. However, in case of processing large numbers of cells for module fabrication, further testing is required to assure reproducibility of this technique. Various techniques have been developed for fabricating solar modules by lamination using ethylene vinyl acetate with a glass superstrate, and no cell breakage has been noted.

Campbell, R. B.; Stapleton, R. E.; Sienkiewicz, L.; Rai-Choudhury, P.

1980-01-01T23:59:59.000Z

80

CT-Guided Percutaneous Fine-Needle Aspiration Biopsy of the Inferior Vena Cava Wall: A Posterior Coaxial Approach  

Science Conference Proceedings (OSTI)

A 72-year-old man was referred to our department with an incidentally diagnosed bronchogenic carcinoma of the right upper lobe. Positron emission tomography (PET) combined with computed tomography (PET-CT) revealed an unexpected hot spot in the ventral wall of the infrarenal segment of the inferior vena cava (IVC). Diagnostic biopsy of this lesion was performed under CT guidance with semiautomated 20G fine-needle aspiration (FNA) through a 19G coaxial needle. Cytology revealed few carcinoma cells, which led to the remarkable diagnosis of a distant metastasis to the IVC wall. Both the immediate postinterventional CT control and the further surveillance period of the patient were unremarkable; in particular, no signs of bleeding complications were detected. We conclude that coaxial FNA of an IVC wall lesion is technically feasible and may even help diagnose distant metastasis.

Kos, Sebastian, E-mail: skos@gmx.de; Bilecen, Deniz [University Hospital Basel, Institute of Radiology (Switzerland); Baumhoer, Daniel [University Hospital Basel, Institute of Pathology (Switzerland); Guillaume, Nicolas [University Hospital Basel, Institute of Nuclear Medicine (Switzerland); Jacob, Augustinus L. [University Hospital Basel, Institute of Radiology (Switzerland)

2010-02-15T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Simulation of the electron diffraction patterns from needle/rod-like precipitates in Al-Mg-Si alloys  

Science Conference Proceedings (OSTI)

The origin of the selected area electron diffraction (SAED) patterns from needle/rod-like metastable precipitates embedded in {alpha}-Al matrix in Al-Mg-Si alloys have been studied via an example of {beta}'' phase. In addition, the SAED pattern from {beta}'' phase has been simulated with significant improvement in comparison with the previous simulations. Three important factors, i.e. the 12 crystallographically equivalent variants of {beta}'' phase in the {alpha}-Al matrix due to the highly symmetric f.c.c. structure of {alpha}-Al, the coherence between {beta}'' phase and the {alpha}-Al matrix, and the double diffractions from the {alpha}-Al matrix and {beta}'' phase, are proved to contribute to the special square-shaped features in the SAED patterns from {beta}'' phase and thus fully taken into account in the simulation. An improved but simplified method for simulating the SAED patterns from needle/rod-like metastable precipitates has been developed. This method is further verified by simulating the SAED pattern from Q phase. The simulated SAED patterns from both {beta}'' and Q phases fit the experimentally determined patterns very well. - Highlights: {yields}An improved method has been developed to simulate the SADPs of Al alloys. {yields}The formation mechanism of SADPs of Al alloys has been systemically studied. {yields}Double diffraction contributes to the formation of the SADPs of Al alloys.

Li Kai [State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083 (China); Song Min, E-mail: Min.Song.Th05@Alum.Dartmouth.ORG [State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083 (China); Du Yong [State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083 (China); Zhang Hong [School of Materials Science and Engineering, Central South University, Changsha 410083 (China)

2011-09-15T23:59:59.000Z

82

Neuronal oxidative injury and dendritic damage induced by carbofuran: Protection by memantine  

Science Conference Proceedings (OSTI)

Carbamate insecticides mediate their neurotoxicity by acetylcholinesterase (AChE) inactivation. Male Sprague-Dawley rats acutely intoxicated with the carbamate insecticide carbofuran (1.5 mg/kg, sc) developed hypercholinergic signs within 5-7 min of exposure, with maximal severity characterized by seizures within 30-60 min, lasting for about 2 h. At the time of peak severity, compared with controls, AChE was maximally inhibited (by 82-90%), radical oxygen species (ROS) markers (F{sub 2}-isoprostanes, F{sub 2}-IsoPs; and F{sub 4}-neuroprostanes, F{sub 4}-NeuroPs) were elevated 2- to 3-fold, and the radical nitrogen species (RNS) marker citrulline was elevated 4- to 8-fold in discrete brain regions (cortex, amygdala, and hippocampus). In addition, levels of high-energy phosphates (HEPs) were significantly reduced (ATP, by 43-56%; and phosphocreatine, by 37-48%). Values of total adenine nucleotides and total creatine compounds declined markedly (by 41-56% and 35-45%, respectively), while energy charge potential remained unchanged. Quantitative morphometric analysis of pyramidal neurons of the hippocampal CA1 region revealed significant decreases in dendritic lengths (by 64%) and spine density (by 60%). Pretreatment with the N-methyl-D-aspartate (NMDA) receptor antagonist memantine (18 mg/kg, sc), in combination with atropine sulfate (16 mg/kg, sc), significantly attenuated carbofuran-induced changes in AChE activity and levels of F{sub 2}-IsoPs and F{sub 4}-NeuroPs, declines in HEPs, as well as the alterations in morphology of hippocampal neurons. MEM and ATS pretreatment also protected rats from carbofuran-induced hypercholinergic behavioral activity, including seizures. These findings support the involvement of ROS and RNS in seizure-induced neuronal injury and suggest that memantine by preventing carbofuran-induced neuronal hyperactivity blocks pathways associated with oxidative damage in neurons.

Gupta, Ramesh C. [Toxicology Department, Murray State University, Breathitt Veterinary Center, P.O. Box 2000, 715 North Drive, Hopkinsville, KY 42240-2000 (United States)]. E-mail: ramesh.gupta@murraystate.edu; Milatovic, Snjezana [Vanderbilt University Medical Center, Nashville, TN 37232 (United States); Dettbarn, Wolf-D. [Vanderbilt University Medical Center, Nashville, TN 37232 (United States); Aschner, Michael [Vanderbilt University Medical Center, Nashville, TN 37232 (United States); Milatovic, Dejan [Vanderbilt University Medical Center, Nashville, TN 37232 (United States)

2007-03-15T23:59:59.000Z

83

Computational study of the complexation of metal ion precursors in dendritic polymers  

E-Print Network (OSTI)

Metal ions are important for medical, environmental and catalytic applications. They are used as precursor molecules for the manufacture of metal nanocatalysts, which are promising materials for an array of biomedical, industrial, and technological applications. Understanding the effect of the environment upon a metal ion-dendrimer system constitutes a step closer to the understanding of the liquid phase templated synthesis of metal nanoparticles. In this dissertation we have used computational techniques such as abinitio calculations and molecular dynamics (MD) simulations to investigate the complexation of Cu(II) and Pt(II) metal ions to a polyamidoamine (PAMAM) dendritic polymer from structural, thermodynamic, and kinetic viewpoints. First, we analyze the local configuration of a low generation polyamidoamine dendrimer to understand the role of intramolecular interactions. Then, we examine the local configuration of dendrimer outer pockets in order to determine their capacity to encapsulate water within. Next, the complexation of Cu(II) with a small –OH terminated dendrimer in presence of solvent and counterions is investigated. This relatively simple system gives insight on how cationic species bind within a dendrimer. The complexation of potassium tetrachloroplatinate, commonly used precursor salt in dendrimer templated synthesis of platinum and bimetallic platinum-containing nanoparticles, with PAMAM dendrimer has been the subject of several experimental reports. So we investigate the complexation of potassium tetrachloroplatinate within a dendrimer outer pocket in order to understand the effect of dendrimer branches, Pt(II) speciation, pH, solvent and counterions upon it. Our study shows that dendrimer branches can improve the thermodynamics but can also preclude the kinetics by raising the energy barriers. Our study provides an explanation of why, where Pt(II) and how Pt(II) binds. We believe that these molecular level details, unaccessible to experimental techniques, can be a helpful contribution toward furthering our understanding of the complexation of Pt(II) and the starting point to study the next step of dendrimer templated synthesis, the reduction of Pt(II) into platinum nanoparticles inside pockets.

Tarazona Vasquez, Francisco

2007-12-01T23:59:59.000Z

84

Functional and phenotypic effects of AhR activation in inflammatory dendritic cells  

SciTech Connect

Aryl hydrocarbon receptor (AhR) activation by 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) induces immune suppression. Dendritic cells (DCs) are key antigen presenting cells governing T cell activation and differentiation. However, the consequences of AhR activation in DCs are not fully defined. We hypothesized that AhR activation alters DC differentiation and generates dysfunctional DCs. To test this hypothesis, inflammatory bone marrow-derived DCs (BMDCs) from C57Bl/6 mice were generated in the presence of vehicle or TCDD. TCDD decreased CD11c expression but increased MHC class II, CD86 and CD25 expression on the BMDCs. The effects of TCDD were strictly AhR-dependent but not exclusively DRE-mediated. Similar effects were observed with two natural AhR ligands, 6-formylindolo[3,2-b]carbazole (FICZ) and 2-(1H-Indol-3-ylcarbonyl)-4-thiazolecarboxylic acid (ITE). TCDD increased LPS- and CpG-induced IL-6 and TNF-{alpha} production by BMDCs but decreased their NO production. TCDD decreased CpG-induced IL-12p70 production by BMDCs but did not affect their secretion of IL-10. TCDD downregulated LPS- and CpG-induced NF-kB p65 levels and induced a trend towards upregulation of RelB levels in the BMDCs. AhR activation by TCDD modulated BMDC uptake of both soluble and particulate antigens. Induction of indoleamine-2,3-dioxygenase (IDO) and TGF-{beta}3 has been implicated in the generation of regulatory T cells following AhR activation. TCDD increased IDO1, IDO2 and TGF-{beta}3 mRNA levels in BMDCs as compared to vehicle. Despite the induction of regulatory mediators, TCDD-treated BMDCs failed to suppress antigen-specific T cell activation. Thus, AhR activation can directly alter the differentiation and innate functions of inflammatory DCs without affecting their ability to successfully interact with T cells.

Bankoti, Jaishree [Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT (United States); Center for Environmental Health Sciences, University of Montana, Missoula, MT (United States); Rase, Ben [Center for Environmental Health Sciences, University of Montana, Missoula, MT (United States); Simones, Tom [Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT (United States); Center for Environmental Health Sciences, University of Montana, Missoula, MT (United States); Shepherd, David M., E-mail: david.shepherd@umontana.ed [Department of Biomedical and Pharmaceutical Sciences, University of Montana, Missoula, MT (United States); Center for Environmental Health Sciences, University of Montana, Missoula, MT (United States)

2010-07-15T23:59:59.000Z

85

A Novel Fenestration Technique for Abdominal Aortic Dissection Membranes Using a Combination of a Needle Re-entry Catheter and the 'Cheese-wire' Technique  

Science Conference Proceedings (OSTI)

Purpose: This study was designed to demonstrate the applicability of a combined needle-based re-entry catheter and 'cheese-wire' technique for fenestration of abdominal aortic dissection membranes. Methods: Four male patients (mean age: 65 years) with acute complicated aortic type B dissections were treated at our institution by fenestrating the abdominal aortic dissection membrane using a hybrid technique. This technique combined an initial membrane puncture with a needle-based re-entry catheter using a transfemoral approach. A guidewire was passed through the re-entry catheter and across the membrane. Using a contralateral transfemoral access, this guidewire was then snared, creating a through-and-through wire access. The membrane was then fenestrated using the cheese-wire maneuver. Results: We successfully performed: (a) membrane puncture; (b) guidewire passage; (c) guidewire snaring; and (d) cheese-wire maneuver in all four cases. After this maneuver, decompression of the false lumen and acceptable arterial inflow into the true lumen was observed in all cases. The dependent visceral arteries were reperfused. In one case, portions of the fenestrated membrane occluded the common iliac artery, which was immediately and successfully stented. In another case, long-standing intestinal hypoperfusion before the fenestration resulted in reperfusion-related shock and intraoperative death of the patient. Conclusions: The described hybrid approach for fenestration of dissection membranes is technically feasible and may be established as a therapeutic method in cases with a complicated type B dissection.

Kos, Sebastian, E-mail: skos@gmx.de [University Hospital Basel, Division of Interventional Radiology, Institute of Radiology and Nuclear Medicine (Switzerland); Guerke, Lorenz [University Hospital Basel, Department of Vascular Surgery (Switzerland); Jacob, Augustinus L. [University Hospital Basel, Division of Interventional Radiology, Institute of Radiology and Nuclear Medicine (Switzerland)

2011-12-15T23:59:59.000Z

86

Molecular dynamics simulation of complex molecules at interfaces: dendritic surfactants in clay and amyloid peptides near lipid bilayers  

E-Print Network (OSTI)

We apply a molecular dynamics (MD) simulation technique to complex molecules at interfaces. Partitioning of dendritic surfactants into clay gallery and Ab protein behavior near hydrated lipids are chosen for the purpose. Using a full atomistic model of dendritic surfactants, the confinement force profiles featuring oscillatory fashion at moderate layer separation of 10 to 25 Ĺ were observed. Integration of the confinement forces led to free energy profiles, which, in turn, were used to determine the final morphology of the nanocomposite. From the free energy profiles, smaller and linear surfactants (G1 and G2L) are expected to intercalate into the clay comfortably, while larger surfactants (G2 and G3) are expected to form frustrated intercalated structures due to the location and depth of the free energy minima. This would agree with the previous observations. As primary steps to understand the Ab protein behavior under biological conditions, simulations of bulk water and hydrated lipids were performed and the results were compared with the literature. Hydrated lipids were simulated using a full atomistic model of lipids (dipalmitoylphosphatidylcholine) and water with a cvff force-field and it was found that structural properties such as the molecular head group area and membrane thickness were accurately produced with MD simulation. Systems of the protein Ab(1-42) in bulk water were simulated and some secondary structural change, with loss of part of the a-helical structure, occurred during the 1 ns of simulation time at 323K. The fragment Ab(31-42) with b-sheet conformation was also simulated in bulk water, and the extended b-sheet structure became a bent structure. Simulations of Ab(1- 42) or Ab(31-42) near lipid bilayers have been performed to investigate the structural property changes under biological conditions. The different nature of structural change was observed from the simulations of the protein or fragment in water and near lipid bilayers due to the different solvent environment. The protein has close contacts with the membrane surface. It was impossible to observe the conformational change to b-sheet and protein entrance into the lipid bilayer within 1 ns simulations.

Han, Kunwoo

2006-08-01T23:59:59.000Z

87

Kirkendall-effect-based growth of dendrite-shaped CuO hollow micro/nanostructures for lithium-ion battery anodes  

SciTech Connect

Three-dimensional (3D) dendrite-shaped CuO hollow micro/nanostructures have been prepared via a Kirkendall-effect-based approach for the first time and have been demonstrated as a high-performance anode material for lithium-ion batteries. The as-prepared hollow structures were investigated by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and electrochemical properties. A CuO hollow structure composed of nanocubes outside and a dense film inside was selected as a typical example of the optimized design; it exhibited significantly improved cyclability at a current rate of 0.5 C, with the average Coulombic efficiency of {approx}97.0% and 57.9% retention of the discharge capacity of the second cycle after 50 cycles. The correlation between the structure features of the hollow CuO and their electrochemical behavior was discussed in detail. Smaller size of primary structure and larger internal space of electrode materials are crucial to better electrochemical performance. This work represents that Kirkendall effect is a promising method to fabricate excellent hollow electrode materials for Li-ion batteries. - Graphical abstract: SEM images of 3D dendrite-shaped CuO hollow micro/nanostructures prepared via a Kirkendall-effect-based approach have been shown. The as-prepared CuO electrode exhibited significantly improved cyclability for Li-ion batteries.

Hu Yingying, E-mail: yyhu@phy.ccnu.edu.c [Center for Nanoscience and Nanotechnology, Huazhong Normal University, Wuhan 430079, Hubei (China); Huang Xintang, E-mail: xthuang@phy.ccnu.edu.c [Center for Nanoscience and Nanotechnology, Huazhong Normal University, Wuhan 430079, Hubei (China); Wang Kai; Liu Jinping; Jiang Jian; Ding Ruimin; Ji Xiaoxu; Li Xin [Center for Nanoscience and Nanotechnology, Huazhong Normal University, Wuhan 430079, Hubei (China)

2010-03-15T23:59:59.000Z

88

Lead effects on development and function of bone marrow-derived dendritic cells promote Th2 immune responses  

SciTech Connect

Although lead (Pb) has significant effects on the development and function of macrophages, B cells, and T cells and has been suggested to promote allergic asthma in mice and humans, Pb modulation of bone marrow (BM)-derived dendritic cells (DCs) and the resultant DC effects on Th1 and Th2 development have not been examined. Accordingly, we cultured BM cells with murine granulocyte macrophage-colony stimulating factor (mGM-CSF) {+-} PbCl{sub 2}. At day 10, culture supernatant (SN) and non-adherent cells were harvested for analysis. Additionally, day 10 non-adherent BM-DCs were harvested and recultured with mGM-CSF + LPS {+-} Pb for 2 days. The day 10 Pb exposure significantly inhibited BM-DC generation, based on CD11c expression. Although fewer DCs were generated with Pb, the existing Pb-exposed DCs had significantly greater MHC-II expression than did the non-Pb-exposed DCs. However, these differences diminished upon LPS stimulation. After LPS stimulation, CD80, CD86, CD40, CD54, and MHC-II were all up-regulated on both Pb-DCs and DCs, but Pb-DCs expressed significantly less CD80 than did DCs. The CD86:CD80 ratio suggests a Pb-DC potential for Th2 cell development. After LPS stimulation, IL-6, IL-10, IL-12 (p70), and TNF-{alpha} levels significantly increased with both Pb-DCs and DCs, but Pb-DCs produced significantly less cytokines than did DCs, except for IL-10, which further supports Pb-DC preferential skewing toward type-2 immunity. In vitro studies confirm that Pb-DCs have the ability to polarize antigen-specific T cells to Th2 cells. Pb-DCs also enhanced allogeneic and autologous T cell proliferation in vitro, and in vivo studies suggested that Pb-DCs inhibited Th1 effects on humoral and cell-mediated immunity. The Pb effect was mainly on DCs, rather than on T cells, and Pb's modification of DC function appears to be the main cause of Pb's promotion of type-2-related immunity, which may relate to Pb's enhanced activation of the Erk/MAP kinase pathway.

Gao Donghong [Biggs Laboratory, Wadsworth Center, New York State Department of Health, Empire State Plaza, Albany, NY 12201-0509 (United States); Mondal, Tapan K. [Biggs Laboratory, Wadsworth Center, New York State Department of Health, Empire State Plaza, Albany, NY 12201-0509 (United States); Lawrence, David A. [Biggs Laboratory, Wadsworth Center, New York State Department of Health, Empire State Plaza, Albany, NY 12201-0509 (United States)]. E-mail: lawrencd@wadsworth.org

2007-07-01T23:59:59.000Z

89

Visualization of Dendritic Growth  

Science Conference Proceedings (OSTI)

... Once these images are generated they are saved individually and then used together to produce animations. ... Animations and Images: ...

2010-12-21T23:59:59.000Z

90

Geology and mineral resources of the Los Angeles, Needles, Salton Sea, San Bernardino, and Trona 1/sup 0/ x 2/sup 0/ NTMS quadrangles. National Uranium Resource Evaluation Program  

Science Conference Proceedings (OSTI)

This document provides a summary of the geology and mineral resources for the Los Angeles, Needles, Salton Sea, San Bernardino, and Trona 1/sup 0/ x 2/sup 0/ quadrangles of the National Topographic Map Series. Savannah River Laboratory has issued hydrogeochemical and stream sediment reconnaissance reports for all but the Los Angeles quadrangle. The report is issued in draft form, without detailed technical and copy editing. This was done to make the report available to the public before the end of the National Uranium Resource Evaluation.

Karfunkel, B.S. (comp.)

1982-08-01T23:59:59.000Z

91

Can dendritic cells see light?  

E-Print Network (OSTI)

There are many reports showing that low-level light/laser therapy (LLLT) can enhance wound healing,

Hamblin, Michael R.

92

Needles, California: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

0597°, -114.6141315° 0597°, -114.6141315° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":34.8480597,"lon":-114.6141315,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

93

Windows Vista vs Ubuntu Installaci: procs, temps i problemes  

E-Print Network (OSTI)

Windows Vista vs Ubuntu #12;Índex Instal·lació: procés, temps i problemes Aplicacions Temps d·lació: procés, temps i problemes Procés d'instal·lació de Windows Vista Procés d'instal·lació de Linux Ubuntu 7.04 Temps total Problemes #12;Instal·lació Windows Vista (I) #12;Instal·lació Windows Vista (II

Politècnica de Catalunya, Universitat

94

Characterizing Primary Dendritic Microstructures to Quantify the ...  

Science Conference Proceedings (OSTI)

Nickel Recovery from Sukinda Chromite Overburden Using Shewanella Putrefaciens · Optimization of Process Parameters on the Siffusion Bonding of a ...

95

Pulse Radiolysis Studies of Dendritic Macromolecules  

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

J. K. Whitesell, and M. A. Fox J. Am. Chem. Soc. 123, 12832-12836 (2001) Find paper at ACS Publications Abstract: Electron transfer reactions in Frchet-type dendrimers with...

96

Supporting Information Evolution of Dendritic Platinum Nanosheets  

E-Print Network (OSTI)

87131. 3 Toyota Technical Center, Toyota Motor Engineering & Manufacturing North America, Ann Arbor, MI

Shelnutt, John A.

97

Filtering log data: finding the needles in the haystack  

SciTech Connect

Log data is an incredible asset for troubleshooting in large-scale systems. Nevertheless, due to the ever-growing system scale, the volume of such data becomes overwhelming, bringing enormous burdens on both data storage and data analysis. To address this problem, we present a 2-dimensional online filtering mechanism to remove redundant and noisy data via feature selection and instance selection. The objective of this work is two-fold: (i) to significantly reduce data volume without losing important information, and (ii) to effectively promote data analysis. We evaluate this new filtering mechanism by means of real environmental data from the production supercomputers at Oak Ridge National Laboratory and Sandia National Laboratory. Our preliminary results demonstrate that our method can reduce more than 85% disk space, thereby significantly reducing analysis time. Moreover, it also facilitates better failure prediction and diagnosis by more than 20%, as compared to the conventional predictive approach relying on RAS (Reliability, Availability, and Serviceability) events alone.

Yu, Li [Illinois Institute of Technology; Zheng, Ziming [Illinois Institute of Technology; Lan, Zhiling [Illinois Institute of Technology; Jones, Terry R [ORNL; Brandt, Jim [Sandia National Laboratories (SNL); Gentile, Ann [Sandia National Laboratories (SNL)

2012-01-01T23:59:59.000Z

98

Finding a Needle in Haystack: Facebook’s Photo Storage  

E-Print Network (OSTI)

Abstract: This paper describes Haystack, an object storage system optimized for Facebook’s Photos application. Facebook currently stores over 260 billion images, which translates to over 20 petabytes of data. Users upload one billion new photos (?60 terabytes) each week and Facebook serves over one million images per second at peak. Haystack provides a less expensive and higher performing solution than our previous approach, which leveraged network attached storage appliances over NFS. Our key observation is that this traditional design incurs an excessive number of disk operations because of metadata lookups. We carefully reduce this per photo metadata so that Haystack storage machines can perform all metadata lookups in main memory. This choice conserves disk operations for reading actual data and thus increases overall throughput. 1

Doug Beaver; Sanjeev Kumar; Harry C. Li; Jason Sobel; Peter Vajgel; Facebook Inc

2010-01-01T23:59:59.000Z

99

Spontaneous magnetization in dipolar needles George Miloshevich1,2  

E-Print Network (OSTI)

Khomeriki1,4 , Stefano Ruffo3,5 (1) Department of Physics, Faculty of Exact and Natural Sciences, Tbilisi State University, 0128 Tbilisi, Georgia (2) Department of Physics, The University of Texas at Austin

Paris-Sud XI, Université de

100

Non-drop needles: Credit crunch Christmas trees  

E-Print Network (OSTI)

, are typically grown from seeds originating in the former Russian state of Georgia in the Caucasus2

Schroeder, Brenda K.

Note: This page contains sample records for the topic "dendrite lacy needle" 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

City of Needles, California (Utility Company) | Open Energy Informatio...  

Open Energy Info (EERE)

profile. Create one now This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png Electric Rates Average Rates Residential:...

102

Finding the Needle in the Big Data Systems Haystack  

Science Conference Proceedings (OSTI)

With the increasing importance of big data, many new systems have been developed to "solve" the big data challenge. At the same time, famous database researchers argue that there is nothing new about these systems and that they're actually a step backward. ... Keywords: Information management,Data handling,Data storage systems,Indexes,OLAP,big data,mapreduce,key/value stores,analytic systems,database,OLTP

Tim Kraska

2013-01-01T23:59:59.000Z

103

alexandrov-99.PDF  

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

National Aeronautics and Space Administration Goddard Institute for Space Studies New York, New York A. A. Lacis and B. E. Carlson National Aeronautics and Space...

104

Optimization Online - A Branch-and-Price Algorithm and New Test ...  

E-Print Network (OSTI)

Aug 30, 2002 ... A Branch-and-Price Algorithm and New Test Problems for Spectrum Auctions. Oktay Gunluk (oktay ***at*** watson.ibm.com) Laci Ladanyi ...

105

Seeding science, courting conclusions: Reexamining the intersection of science, corporate cash, and the law  

E-Print Network (OSTI)

December 31, 2004 Seeding Science, Courting Conclusionsand William B. Lacy 1983 Science, Agriculture, and thecon?icts in a world of science, val- ues, and blind spots. ”

Freudenburg, W R

2005-01-01T23:59:59.000Z

106

Research Highlight  

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

Effects of Relative Humidity on Aerosols-Implications for Climate Submitter: Lacis, A. A., NASA - Goddard Institute for Space Studies Area of Research: Aerosol Properties Working...

107

Silicon dendritic web material process development. Second quarterly report  

DOE Green Energy (OSTI)

The properties of the cells to be used in the first 30 cm by 60 cm module are given. The average efficiency was 12.4 +- 0.8%. The highest efficiency measured was 14.2%. A satisfactory lamination has been made with polyvinyl butyral replacing ethylene vinyl acetate.

Stapleton, R. E.; Meier, D. L.; Sienkiewicz, L.; Campbell, R. B.; Rai-Choudhury, P.

1980-11-17T23:59:59.000Z

108

Chemically reacting plumes, gas hydrate dissociation and dendrite solidification  

E-Print Network (OSTI)

non-linearity in a multiphase porous media ?ow as a resulta multiphase ?ow will still exist outside the porous medium,multiphase ?ow extensions to the well-known single-phase porous

Conroy, Devin Thomas

2008-01-01T23:59:59.000Z

109

Dendritic Actin Filament Nucleation Causes Traveling Waves and Patches  

E-Print Network (OSTI)

The polymerization of actin via branching at a cell membrane containing nucleation-promoting factors is simulated using a stochastic-growth methodology. The polymerized-actin distribution displays three types of behavior: a) traveling waves, b) moving patches, and c) random fluctuations. Increasing actin concentration causes a transition from patches to waves. The waves and patches move by a treadmilling mechanism which does not require myosin II. The effects of downregulation of key proteins on actin wave behavior are evaluated.

Anders E. Carlsson

2010-05-28T23:59:59.000Z

110

The Three-Dimensional Reconstruction of the Dendritic Structure at ...  

Science Conference Proceedings (OSTI)

... of nickel-based single crystals requires control of the heat transfer, fluid flow, and ... A rectangular base plate with a cross-sectional area normal to the growth ...

111

Chemically reacting plumes, gas hydrate dissociation and dendrite solidification  

E-Print Network (OSTI)

1. Thermal Energy Transport . . . . . 2. Two–phase ?ow in a1. Thermal Energy . . . . . . . . .the conversion of chemical to thermal energy is small (small

Conroy, Devin Thomas

2008-01-01T23:59:59.000Z

112

Monte Carlo Simulation Studies of Dendritic Instabilities in ... - CECM  

E-Print Network (OSTI)

and Tb. Each spin has two possible values, ?i = ?1, and an energy as defined ..... B I%? ,%C 323 (1rC 88). [DC ]#? . Mon and D. Jasnow,0? hys.Rev. A I4? 67!

113

Case Study: Investigating Dendritic Spines Using Computer Visualization Techniques  

E-Print Network (OSTI)

design iterations that led to ImageSurfer's final design, the lessons learned through the design process against PMCA that fluoresces. Additionally, the sample is stained using a different fluorescent called Di are then discretized into a set number of pixels (currently 1024 by 1024 pixels). These pixels form a common x vs. y

North Carolina at Chapel Hill, University of

114

Amphiphilic linear-dendritic block copolymers for drug delivery  

E-Print Network (OSTI)

Polymeric drug delivery systems have been widely used in the pharmaceutical industry. Such systems can solubilize and sequester hydrophobic drugs from degradation, thereby increasing circulation half-life and efficacy. ...

Nguyen, Phuong, Ph. D. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

115

Three Dimensional Simulation of Dendritic Solidification by Lattice ...  

Science Conference Proceedings (OSTI)

Lattice Boltzmann method was used to simulate the transport phenomenon and a ... special characteristics of lattice Boltzmann and cellular automaton methods, ...

116

Micro-mechanical Characterization of Ultra-high Strength Dendritic ...  

Science Conference Proceedings (OSTI)

Nanoscale Creep-fatigue Behavior of Indium at Room Temperature ... Ultra-low Density Nanotubular Metal Oxides with Super-high Modulus and Strength by ...

117

Plasmacytoid Dendritic Cells Are Crucial for the Initiation of Inflammation  

E-Print Network (OSTI)

downstream signaling pathways, in which the activation of the transcription factor nuclear factor kB (NF-kB) results in the production of proinflammatory cytokines, whereas the acti- vation of inhibitor of NF-kB (Ik

Gleeson, Joseph G.

118

POSTER PRESENTATION Open Access HIV triggers immunoregulatory dendritic cells  

E-Print Network (OSTI)

T cells through the non-canonical NF-kB pathway O Manches1* , MV Fernandez1 , J Plumas2 , L Chaperot2 , N activation of the non-canonical NF-kB pathway in pDC, and is essential for IDO induction. TLR7 triggering-dependent fashion, allowing cDC to induce Treg from naĂŻve CD4+ T cells. Conclusion The non-canonical NF-kB pathway

Paris-Sud XI, Université de

119

Numerical Determination of Secondary Dendrite Arm Spacing of Fe ...  

Science Conference Proceedings (OSTI)

The change in the arm spacing is examined by the both changes of cooling rates and ... Optimization of Hierarchical Lattice Structures for Energy Absorption.

120

Effects of Segregation in Nickel-Base Superalloys: Dendritic Stresses  

Science Conference Proceedings (OSTI)

formation was investigated using scanning electron microscopy. (SEM), their effect on dislocation mobility by transmission electron microscopy (TEM). Figure 1 .

Note: This page contains sample records for the topic "dendrite lacy needle" 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.


121

3D Modeling of Dendritic Grain Structures in Turbine Blade ...  

Science Conference Proceedings (OSTI)

modern aircraft engines and land-based power-plants. .... Figure 2 illustrates the grid generation for a close-up detail of a turbine blade geometry. (junction ...

122

Characterization of Three-Dimensional Dendritic Structures in Nickel ...  

Science Conference Proceedings (OSTI)

2Air Force Research Laboratory/RXLM; 2230 Tenth Street; Wright-Patterson AFB, OH 45433-7817, ... due to gravity, K is permeability, L is the height of the mushy ... Roger C. Reed, Kenneth A. Green, Pierre Caron, Timothy P. Gabb, Michael G.

123

Fabrication of a needle-type pH sensor by selective electrodeposition  

E-Print Network (OSTI)

(MEAs) for measurement of the oxidation-reduction potential (ORP)4,5 and dissolved oxygen (DO).6,7 ORP is a measure of the solution potential and thus ORP MEA sensors are non-specific and measure the oxidized

Papautsky, Ian

124

Dipolar needles in the microcanonical ensemble: evidence of spontaneous magnetization and ergodicity breaking  

E-Print Network (OSTI)

Department of Physics, Faculty of Exact and Natural Sciences, Tbilisi State University, 0128 Tbilisi, Georgia

125

Lorentz-force actuated needle-free injection for intratympanic pharmaceutical delivery  

E-Print Network (OSTI)

Delivery of pharmaceuticals to the inner ear via injection through the tympanic membrane is a method of local drug delivery that provides a non-invasive, outpatient procedure to treat many of the disorders and diseases ...

Cloutier, Alison (Alison Marie)

2013-01-01T23:59:59.000Z

126

Human vs. robot operator error in a needle-based navigation system for percutaneous liver interventions  

E-Print Network (OSTI)

Computed tomography (CT) guided percutaneous punctures of the liver for cancer diagnosis and therapy (e.g. tumor biopsy, radiofrequency ablation) are well-established procedures in clinical routine. One of the main challenges ...

Maier-Hein, Lena

127

Drug injection rates and needle-exchange use in New York City ...  

Science Conference Proceedings (OSTI)

for human immunodeficiency virus (HIV) who attended anywhere from 4 to 11 quarterly .... standard error) for each person were used as the dependent variable

128

Electric field induced needle-pulsed arc discharge carbon nanotube production apparatus: Circuitry and mechanical design  

Science Conference Proceedings (OSTI)

A simple and low cost apparatus is reported to produce multiwall carbon nanotubes and carbon nano-onions by a low power short pulsed arc discharge reactor. The electric circuitry and the mechanical design details and a micro-filtering assembly are described. The pulsed-plasma is generated and applied between two graphite electrodes. The pulse width is 0.3 {mu}s. A strong dc electric field is established along side the electrodes. The repetitive discharges occur in less than 1 mm distance between a sharp tip graphite rod as anode, and a tubular graphite as cathode. A hydrocarbon vapor, as carbon source, is introduced through the graphite nozzle in the cathode assembly. The pressure of the chamber is controlled by a vacuum pump. A magnetic field, perpendicular to the plasma path, is provided. The results show that the synergetic use of a pulsed-current and a dc power supply enables us to synthesize carbon nanoparticles with short pulsed plasma. The simplicity and inexpensiveness of this plan is noticeable. Pulsed nature of plasma provides some extra degrees of freedom that make the production more controllable. Effects of some design parameters such as electric field, pulse frequency, and cathode shape are discussed. The products are examined using scanning probe microscopy techniques.

Kia, Kaveh Kazemi [Department of Electrical and Computer Engineering, Islamic Azad University of Bonab, Bonab (Iran, Islamic Republic of); Bonabi, Fahimeh [Department of Engineering, Islamic Azad University of Bonab, Bonab (Iran, Islamic Republic of)

2012-12-15T23:59:59.000Z

129

An optimized Linear Lorentz-force Actuator for biorobotics and needle-free injection  

E-Print Network (OSTI)

Voice coils are a configuration of Linear Lorentz-force Actuator (LLA) that offer efficient transduction of electrical energy into linear motion. The simple geometry of a typical voice coil motor makes the configuration ...

Ball, Nathan B

2007-01-01T23:59:59.000Z

130

Needles in a very dirty haystack: Characterizing the catalytic species in coals  

E-Print Network (OSTI)

fuel production Fischer-Tropsch or methanol synthesis . Moreover, under the reaction conditions hydrocarbons through the Fischer-Tropsch process. To do this, it is necessary to partially oxidize the CH4 production Fischer- Tropsch . Moreover, under the reaction conditions explored, no CO2 was detected, i

Yener, Aylin

131

Forest Research Annual Report and Accounts 2009201010 Significantly, we found that infected larch needles can  

E-Print Network (OSTI)

, there are some associated risks, such as diseases transmitted from wild animals (e.g. Lyme Disease). As part

132

RESOLUTION NO. 2011 -14 A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF NEEDLES,  

E-Print Network (OSTI)

proposed: hydroelectricity, wind, other renewables, nuclear, and coal and natural gas with carbon capture 2050 Hydroelectricity 373.0 505 633 759 890 Wind 1.8 33 63 91 110 Other renewables 5.4 3 7 10 13 hydroelectricity, coal and natural gas with CCS, and nuclear. The electricity produced is intended to replace

133

MOLECULAR COMPOSITION OF NEEDLE COKE FEEDSTOCKS AND MESOPHASE DEVELOPMENT DURING CARBONIZATION.  

E-Print Network (OSTI)

??This study investigates the molecular composition of fluid catalytic cracking (FCC) decant oil and its derivatives that are used as feedstocks for delayed coking to… (more)

Wang, Guohua

2005-01-01T23:59:59.000Z

134

Clear Skies  

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

Clear Skies A. A. lacis NASA Goddard Space Flight Center Institute for Space Studies New York, NY 10025 "convective adjustment"takes place. Energy is transported upward within the...

135

ARM - Publications: Science Team Meeting Documents  

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

Retrieving Aerosol Size Distribution Information from Direct Beam Measurements Gianelli, S.M.(a,b), Carlson, B.E.(b), and Lacis, A.A.(b), Columbia University(a), NASA-GISS(b) An...

136

Laboratory Studies and Numerical Simulations of Cloud Droplet Formation under Realistic Supersaturation Conditions  

Science Conference Proceedings (OSTI)

In this paper, a new device is introduced to study the formation and growth of cloud droplets under near-atmospheric supersaturations. The new device, called the Leipzig Aerosol Cloud Interaction Simulator (LACIS), is based on a laminar flow ...

F. Stratmann; A. Kiselev; S. Wurzler; M. Wendisch; J. Heintzenberg; R. J. Charlson; K. Diehl; H. Wex; S. Schmidt

2004-06-01T23:59:59.000Z

137

Los Angeles CleanTech Incubator to Host Event With Senior Energy...  

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

solar power, and building efficiency. The roundtable will be followed by an open press tour of the LACI facility. The visit builds on President Obama's State of the Union address...

138

X:\\ARM_19~1\\P139-154.WPD  

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

m Session Papers 151 A General Circulation Model (GCM) Parameterization of Pinatubo Aerosols A. A. Lacis, B.E. Carlson, and M.I. Mishchenko NASA Goddard Institute for Space...

139

A Prominent Soma-Dendritic Distribution of Kv3.3 K Channels in  

E-Print Network (OSTI)

-0-691-14515-0 $75.00 | ÂŁ52.00 What Are Gamma-Ray Bursts? Joshua S. Bloom "This is a marvelous book. It contains the new results from the fast-developing science of gamma-ray-burst astronomy along with its fascinating.00 __ Pa: 14557-0 Bloom: what Are Gamma-Ray 11 27.95 19.95 __ Cl: 14556-3 80.00 55.00 __ Pa: 15233-2 Bonner

Turner, Ray

140

Identification of genes influencing dendrite morphogenesis in developing peripheral sensory and central motor neurons  

E-Print Network (OSTI)

driving expression of GSd433 with engrailed-GAL4 and stained by in situ hybridisation using an anti-sense probe against robo2. The staining shows the segmentally repeated stripes characteristic for engrailed. The reaction had to be terminated before...

Ou, Yimiao; Chwalla, Barbara; Landgraf, Matthias; van Meyel, Don

2008-07-10T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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.


141

D22: Phase Field Model of Li Dendrite Formation in Lithium Ion ...  

Science Conference Proceedings (OSTI)

C19: Dissolution Behavior of Cu Under Bump Metallization in Ball Grid Array Structure .... H2: Triboluminescent Smart Sensors for Structural Health Monitoring .

142

Neuroscience Letters 418 (2007) 227231 Chronic morphine exposure alters the dendritic morphology  

E-Print Network (OSTI)

and Technology of China, Hefei, Anhui 230027, PR China b Department of Cell biology, Anhui University, Hefei, Anhui 230039, PR China Received 15 December 2006; received in revised form 29 January 2007; accepted 10 March 2007 Abstract Repeated treatment of psychotropic drugs produces changes in brain and behavior

Zhou, Yi-Feng

143

Overcoming dendritic cell-mediated suppression of T cell responses in a prostate tumor environment  

E-Print Network (OSTI)

Prostate cancer is the most prevalent malignancy in American men, leading to significant mortality each year. This is in part due to a lack of effective treatments for advanced disease. The prostate is considered an ideal ...

Higham, Eileen M

2010-01-01T23:59:59.000Z

144

Financial viability and technical evaluation of dendritic cell-carrying "vaccination nodes" for immunotherapy  

E-Print Network (OSTI)

Cancer immunotherapy attempts to stimulate the immune system to reject and destroy tumor cells. Despite the amount of ongoing intensive research to prevent cancer, tumor cells continue to evade immune responses. Currently, ...

Song, Andrew, M. Eng. Massachusetts Institute of Technology

2008-01-01T23:59:59.000Z

145

Intron-exon organization of the human gene coding for the lipoprotein-associated coagulation inhibitor: The factor Xa dependent inhibitor of the extrinsic pathway of coagulation  

Science Conference Proceedings (OSTI)

Blood coagulation can be initiated when factor VII(a) binds to its cofactor tissue factor. This factor VIIa/tissue factor complex proteolytically activates factors IX and X, which eventually leads to the formation of a fibrin clot. Plasma contains a lipoprotein-associated coagulation inhibitor (LACI) which inhibits factor Xa directly and, in a Xa-dependent manner, also inhibits the factor VIIa/tissue factor complex. Here the authors report the cloning of the human LACI gene and the elucidation of its intron-exon organization. The LACI gene, which spans about 70 kb, consists of nine exons separated by eight introns. As has been found for other Kunitz-type protease inhibitors, the domain structure of human LACI is reflected in the intron-exon organization of the gene. The 5{prime} terminus of the LACI mRNA has been determined by primer extension and S1 nuclease mapping. The putative promoter was examined and found to contain two consensus sequences for AP-1 binding and one for NF-1 binding, but no TATA consensus promoter element.

van der Logt, C.P.E.; Reitsma, P.H.; Bertina, R.M. (Univ. Hospital, Leiden (Netherlands))

1991-02-12T23:59:59.000Z

146

Effects of Impulse Voltage Polarity, Peak Amplitude, and Rise Time on Streamers Initiated From a Needle Electrode in Transformer Oil  

E-Print Network (OSTI)

An electrothermal hydrodynamic model is presented to evaluate effects of the applied lightning impulse voltage parameters such as polarity, magnitude, and rise time on the initiation and propagation of the streamers formed ...

Jadidian, Jouya

147

Reduce cycle time and work in process in a medical device factory : scheduling policies for needle assembly machine  

E-Print Network (OSTI)

Many manufacturing firms have improved their operations by implementing a work-in-process (WIP) limiting control strategy. This project explores the application of this concept to limit WIP and reduce cycle time for the ...

Meng, Kai, M. Eng. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

148

Reduce cycle time and work in process in a medical device factory : scheduling of needle hub molding machines  

E-Print Network (OSTI)

Many manufacturing firms have improved their operations by implementing a work-in-process (WIP) limiting control strategy. This project explores the application of this concept to limit WIP and reduce cycle time for the ...

Yao, Jing, M. Eng. Massachusetts Institute of Technology

2007-01-01T23:59:59.000Z

149

Environ. Sc/. Techno/.1993, 27, 2593-2605 Transport and Fate of Reactive Trace Gases in Red Spruce Needles. 2.  

E-Print Network (OSTI)

. For in- stance, the Microsoft MFC GUI framework and OCX com- ponents are de facto industry standards will be automatically acquired and released, ACE provides a helper class called ACE Guard, which is defined as follows: template class ACE_Guard { public: ACE_Guard (MUTEX &m): lock (m) { this

Aneja, Viney P.

150

Large-area sheet task advanced dendritic web growth development. Quarterly report, October 23, 1983-December 31, 1983  

DOE Green Energy (OSTI)

Two types of design concepts were evaluated with the thermal models: (1) a vertical thermal element which modifies both the temperature profile in the web as well as the convective gas flow near the web; and (2) a thinner lid configuration in which the second lid is replaced by a hot cavity. Each involves trade-offs which need experimental evaluation. Residual stress measurements using the serial split-width technique indicated that the real residual stress was comparable to (or less than) the equivalent residual stress, which has been used as a measure of structural perfection in web crystals in previous reports. New dynamic and new static configurations were given preliminary evaluation in the laboratory, with results generally in agreement with the made predictions. Improved system temperature measurements were made leading to growth in closer agreement with the model predictions. Improved methods for controlling convective gas flow and oxide deposition were developed.

Duncan, C.S.; Seidensticker, R.G.; McHugh, J.P.

1984-03-06T23:59:59.000Z

151

I N T R O D U C T I O N Serendipity is jumping into a haystack to search for a needle, and  

E-Print Network (OSTI)

­4 0 2 4 6 8 Figure 1.1. The first gamma-ray burst, GRB 670702, detected by the Vela 3a,b and 4a the burst is not zero due to persistent gamma-ray sources in the sky and random instrumental events second. Adapted from J. Bonnell, A Brief History of the Discovery of Cosmic Gamma-Ray Bursts. http

Landweber, Laura

152

Yeast-based vaccine approaches to cancer immunotherapy  

E-Print Network (OSTI)

Saccharomyces cerevisiae stimulates dendritic cells and represents a promising candidate for cancer immunotherapy development. Effective cross-presentation of antigen delivered to dendritic cells is necessary for successful ...

Howland, Shanshan W

2008-01-01T23:59:59.000Z

153

Browse by Discipline -- E-print Network Subject Pathways: Power  

Office of Scientific and Technical Information (OSTI)

M N O P Q R S M N O P Q R S T U V W X Y Z La Peyre, Megan (Megan La Peyre) - Louisiana Fish and Wildlife Cooperative Research Unit U.S. Geological Service & School of Renewable Natural Resources, Louisiana State University Labat, Jean-Philippe (Jean-Philippe Labat) - Laboratoire d'Océanographie de Villefranche Lachenbruch, Barbara (Barbara Lachenbruch) - Department of Wood Science and Engineering, Oregon State University Lacy, Bob (Bob Lacy) - Chicago Zoological Society. Brookfield Zoo LaFrance, Jeffrey T. (Jeffrey T. LaFrance) - Department of Economics, Monash University Lahti, David C. (David C. Lahti) - Department of Biology, Queens College, City University of New York Lai, Chun-Ta (Chun-Ta Lai) - Department of Biology, San Diego State University Laidre, Kristin L. (Kristin L. Laidre) - Polar Science Center,

154

cairns-99  

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

Photopolarimetry and Aerosols Photopolarimetry and Aerosols B. Cairns, B. E. Carlson, A. A. Lacis, and L. D. Travis National Aeronautics and Space Administration Goddard Institute for Space Studies New York, New York Introduction Evidence that tropospheric aerosols can cause a direct radiative forcing comparable in magnitude, though opposite in sign, to the expected climate forcing by greenhouse gases (Hansen and Lacis 1990; Penner et al. 1994), makes a compelling case for improved efforts to obtain accurate information about the distribution of tropospheric aerosols and their radiative impact. The only method, by which we would expect to obtain a global picture of the magnitude and variability of aerosol properties, is from satellite measurements. As discussed by Wang and Gordon (1994), the retrieval of aerosol optical

155

Dendritic cell maturation and activation via RNA/DNA danger signals : co-delivery of protein antigen with siRNA or CpG DNA  

E-Print Network (OSTI)

Traditional vaccines consisting of live attenuated pathogens or inactivated toxins cannot be readily applied to the more challenging diseases of the present e.g. hepatitis C and the human immunodeficiency virus. As such, ...

Yap, Jonathan Woon Teck

2005-01-01T23:59:59.000Z

156

Differential Requirement for CD70 and CD80/CD86 in Dendritic Cellmediated Activation of Tumor Tolerized CD8 T Cells  

E-Print Network (OSTI)

A major obstacle to efficacious T cell-based cancer immunotherapy is the tolerizing-tumor microenvironment that rapidly inactivates tumor-infiltrating lymphocytes. In an autochthonous model of prostate cancer, we have ...

Bak, S. Peter G.

157

Study of poly(phenylene ethynylene)s, dendritic quenchers, and molecular beacons towards the application of a poly(phenylene ethynylene)-based biosensor  

E-Print Network (OSTI)

Poly(para-phenylene ethynylene)s (PPE)s are highly emissive conjugated polymers that are easily quenched by target analytes. As a result, they have been increasingly incorporated into sensing platforms, both as chemosensors ...

Bailey, Ghislaine Caroline

2007-01-01T23:59:59.000Z

158

Follicular Dendritic Cell-Mediated Up-Regulation of CXCR4 Expression on CD4 T Cells and HIV Pathogenesis1  

E-Print Network (OSTI)

records for quarterly profits. This past winter, concerns over the security of the gas supply led major (25% vs 14% overall). Women were also twice as likely to be strongly opposed to nuclear power (21% vs a familiar theme, support for renewables as a priority was endorsed most strongly by women (52% of women vs

Seamons, Kent E.

159

Role of microRNA?155 in dendritic cells and macrophages MiR?155 directly targets PU.1 and IL13R1.  

E-Print Network (OSTI)

??In search of genes differentially expressed between M1 (pro?Th1 or pro?inflammatory) and M2 (pro?Th2 or pro?tolerogenic) macrophages, BIC (microRNA 155 hosting gene) was found up… (more)

Martinez?Nunez, Rocio Teresa

2010-01-01T23:59:59.000Z

160

Tissue transglutaminase treatment leads to concentration-dependent changes in dendritic cell phenotype - implications for the role of transglutaminase in coeliac disease  

E-Print Network (OSTI)

2007, 357:1731-1743. 14. Jensen K, Sollid LM, Scott H, Paulsen G, Kett K, Thorsby E, Lundin KEA: Gliadin-specific T cell responses in peripheral blood of healthy individuals involve T cells restricted by the coeliac disease associated DQ2 heterodimer...

Dalleywater, William J; Chau, David YS; Ghaemmaghami, Amir M

2012-04-16T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Cell interaction with three-dimensional sharp-tip nanotopography  

E-Print Network (OSTI)

230 nm in pitch) and tip shape (needle- or blade-like sharppitch was all kept constant to be 230 nm and tips were all sharpened to be needle- or blade-

Choi, Chang-Hwan; Hagvall, S H; Wu, B M; Dunn, JCY; Beygui, R E; Kim, C J

2007-01-01T23:59:59.000Z

162

BMC Clinical Pharmacology BioMed Central  

E-Print Network (OSTI)

Research article Pharmacokinetics of recombinant human growth hormone administered by cool.click ™ 2, a new needle-free device, compared with subcutaneous administration using a conventional syringe and needle

Chris Brearley; Anthony Priestley; James Leighton-scott; Michel Christen

2007-01-01T23:59:59.000Z

163

ICE Oxford Lemon VTI User Manual  

Science Conference Proceedings (OSTI)

... 9. Frequently check back to make sure it is properly cooling. ... machine would be to let it cool down to ... 2. Set needle valve to passive and open needle ...

2013-03-04T23:59:59.000Z

164

Placement Effectiveness of a Drill-Assisted Versus Manual Intraosseous Catheter by Resident Physicians in a Swine Model  

E-Print Network (OSTI)

of a Drill-Assisted Versus Manual Intraosseous Catheter byIO needle and 76.2% with the manual IO needle (p=0.04).common complication of the manual IO insertion was a bent

Hafner, John William; Bryant, Adam; Huang, Felix; Swisher, Keir

2013-01-01T23:59:59.000Z

165

AlMnCrCuFeNi Multicomponent Alloy with Superior Hardness and ...  

Science Conference Proceedings (OSTI)

The optical and electronic microscopy analysis of the remelted alloy indicated a dendritic ... Processing and Mechanical Behavior of Unalloyed Plutonium.

166

Advanced Lithium Ion Battery Technologies - Energy Innovation Portal  

The Berkeley Lab technology contributes to improved battery safety by circumventing lithium metal dendrite formation. Benefits. ... hybrid electric vehicles;

167

Conductive Binder for Lithium Ion Battery Electrode - IB-2643 ...  

The Berkeley Lab electrode technology contributes to improved battery safety by circumventing lithium metal dendrite ... Scalable manufacturing using ...

168

A single mutation in the core domain of the lac repressor reduces leakiness  

E-Print Network (OSTI)

of allosteric control. Protein engineering has brought about LacI var- iants with altered inducibility: directed evolution yielded variants with 100-fold tighter affinity for IPTG that car- ried mutations in both the DNA and inducer binding domains [40... . Biochemistry 2008, 47:8058–8069. 39. Meinhardt S, Manley MW Jr, Becker NA, Hessman JA, Maher LJ 3rd, Swint-Kruse L: Novel insights from hybrid LacI/GalR proteins: family-wide functional attributes and biologically significant variation in transcription...

Gatti-Lafranconi, Pietro; Dijkman, Willem P; Devenish, Sean RA; Hollfelder, Florian

2013-07-08T23:59:59.000Z

169

Low cost silicon solar array project. Task I. Establishment of the feasibility of a process capable of low cost, high volume production of silane, SiH/sub 4/. Annual report  

DOE Green Energy (OSTI)

The web furnace was set up, calibrated, and made operational for pulling dendritic-web samples. Numerous growth runs were made to grow primitive dendrites for use as the dendritic seed crystals for the web growth. Models were developed and computer programs applied to ascertain the thermal geometries present in the susceptor, crucible melt, meniscus and web. The facilities for obtaining characterization data have been set up and made operational. (WDM)

Breneman, W.C.; Mui, J.Y.P.

1976-10-01T23:59:59.000Z

170

Materials Week '97: Thursday AM Session  

Science Conference Proceedings (OSTI)

HIGH CYCLE OF FATIGUE OF STRUCTURAL MATERIALS: Session V: High Cycle ... To decouple the combined influence of dendrite arm spacing and porosity, ...

171

Materials Research in Microgravity  

Science Conference Proceedings (OSTI)

Jul 31, 2011... experiments include drop tubes and towers that provide seconds of ... Dendrite Growth into Undercooled Melts: Investigated on Earth and in ...

172

Met and Mat Trans Contents B: October 1995 - TMS  

Science Conference Proceedings (OSTI)

Permeability for Cross Flow Through Columnar-Dendritic Alloys [pp. ... Modeling of Fluid Flow and Heat Transfer in the Plasma Region of the dc Electric Arc ...

173

Porosity Clusters and Recrystallization in Single Crystal Components  

Science Conference Proceedings (OSTI)

The influence of cross-section transients on dendritic single-crystal growth in the .... Ceramic accumulations in the transient region also influence heat transfer.

174

EPD 2013 Student Poster Contest - Graduate  

Science Conference Proceedings (OSTI)

Mar 4, 2013 ... 1 wt% aqueous solution of nitric acid (HNO3) was used to selectively ... The distribution of zinc and aluminum along dendrites were analyzed ...

175

here  

Science Conference Proceedings (OSTI)

... Pennsylvania. 2. PWA 4098 GAS TURBINE ENGINE .... Liquid metal cooling. 30 ... TMS ba le on fluid flow within a dendrite field – new kid on the block.

176

PowerPoint-Präsentation  

Science Conference Proceedings (OSTI)

... 23. Scales in Batteries. 10 µm: membrane, current collector. ... 100 µm: cell, dendrite. 1 mm: battery. ... 25. Li deintercalation from Si-anode material. ...

2012-10-04T23:59:59.000Z

177

Effects of Gravity on the Columnar to Equiaxed Transition in ...  

Science Conference Proceedings (OSTI)

The effects of gravity, thermal natural convection and dendrite transport were integrated into the model. Simulations of vertical directional solidification of an ...

178

Independent Oversight Review of the Idaho National Laboratory...  

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

argon cell resulting from the uranium dendrites being vaporized and subsequent release of radioactive material. Based on a previous analysis referenced in the FHA, this fire is...

179

Tue PM Solidification  

Science Conference Proceedings (OSTI)

The modification mechanism of dendrite morphology by electric field was .... (2) defining of solute segregations in different scales and the basic principles for the  ...

180

ICME Modeling of a Super Vacuum Die Cast (SVDC) AZ91 ...  

Science Conference Proceedings (OSTI)

... of a super vacuum die cast (SVDC) AZ91 automotive shock tower component. .... PI-7: A Three-dimensional Lattice Boltzmann Model for Columnar Dendrite ...

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Expression of the Lhx genes apterous and lim1 in an errant polychaete: implications for bilaterian appendage evolution, neural development, and muscle diversification  

E-Print Network (OSTI)

targeting of axonal projections in ancestral bilaterians [orientation of axonal projections of particular spinal cordthe dendritic growth of projection neurons to antennal lobe

Winchell, Christopher J; Jacobs, David K

2013-01-01T23:59:59.000Z

182

view accepted abstracts  

Science Conference Proceedings (OSTI)

Solute Redistribution During Planar and Dendritic Growth of Directionally Solidified Ni-Base Superalloy CMSX-10. Seong Moon SEO. Korea Institute of Materials ...

183

Electrochemical Impedance Spectroscopy of SEI on Porous SnO 2 ...  

Science Conference Proceedings (OSTI)

Dendrite Tip Shape in Pivalic Acid-Ethanol and Succinonitrile-Salol Systems · Development of In-Situ Mg-Based Bulk Metallic Glass Composites with High ...

184

NGP Collected Publications  

Science Conference Proceedings (OSTI)

... TA, Identification and Proof Testing of New Total Flooding Agents: Combustion ... NCB, DeSchepper, DC, and Balogh, L., Dendritic Polymers as Fire ...

2013-06-28T23:59:59.000Z

185

Hot Tear Formation and Coalescence Observations in Organic Alloys  

Science Conference Proceedings (OSTI)

... for dendrites belonging to the same grain, no grain boundary energy has to be ... Hydro Aluminum AS, Norway, Institute National Polytechnique de Grenoble, ...

186

Segregation and Solid Evolution during the Solidification of Niobium ...  

Science Conference Proceedings (OSTI)

The grid size of the mesh was on the order of secondary dendrite arm spacing. ..... Proceedinps: Materials for Advanced Power Engineering, v5, Part. III, eds.

187

Expanding HAART to Control the Spread of HIV Among ... - CECM  

E-Print Network (OSTI)

Each phase diagram above depicts where in the social interaction plane. HIV becomes extinct (green) or endemic (red). Yellow dots show needle-sharing.

188

21st century Locomotive technology Quarterly technical Status Report 16 DOE/AL68284-TSR16  

DOE Green Energy (OSTI)

Studies of nozzle flow area, the interaction of fuel injector geometry with nozzle geometry, and injector needle raise and fall rates were performed.

Lembit Salasoo; Jennifer Topinka

2007-02-20T23:59:59.000Z

189

The Formation of SRZ on a Fourth Generation Single Crystal ...  

Science Conference Proceedings (OSTI)

4th generation nickel-base single crystal (SC) superalloy with aluminide coating ... Granular precipitates distributed in the upper part of SRZ, and needle-like ...

190

THE CHINA COUNCIL FOR INTERNATIONAL COOPERATION  

E-Print Network (OSTI)

diffusion layer properties. HVDC Syringe Pump High-Voltage DC Supply Syringe Needle Rotating and Translating Grounded Target HVDC . . . . . ... .. . . . . . . . . ..... . Particles Porous Films Dense Films

191

The Merits of Piping Jeanne D'arc Gas to the AvalonThe Merits of Piping Jeanne D'arc Gas to the Avalon Dr. Stephen Bruneau, P.EngDr. Stephen Bruneau, P.Eng  

E-Print Network (OSTI)

diffusion layer properties. HVDC Syringe Pump High-Voltage DC Supply Syringe Needle Rotating and Translating Grounded Target HVDC . . . . . ... .. . . . . . . . . ..... . Particles Porous Films Dense Films

Bruneau, Steve

192

Harm Reduction Journal BioMed Central  

E-Print Network (OSTI)

Needle and syringe sharing practices of injecting drug users participating in an outreach HIV prevention program in Tehran, Iran: A cross-sectional study

Mohsen Vazirian; Bijan Nassirimanesh; Saman Zamani; Masako Ono; Masahiro Kihara; Shahrzad Mortazavi Ravari; Mohammad Mehdi Gouya

2005-01-01T23:59:59.000Z

193

Harm Reduction Journal BioMed Central  

E-Print Network (OSTI)

The Washington Needle Depot: fitting healthcare to injection drug users rather than injection drug users to healthcare: moving from a syringe exchange to syringe distribution model

Dan Small; Andrea Glickman; Galen Rigter; Thia Walter; Open Access

2010-01-01T23:59:59.000Z

194

New Jersey firm creates jobs and vital components for world-leading...  

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

Technology finishes manufacturing it. (Photo by Elle Starkman, PPPL Office Of Communications) This superconducting wire will become thin as a needle when Oxford...

195

Buckling and friction-based linear motion clutch with application to medical devices  

E-Print Network (OSTI)

Improperly inserted and positioned needles and catheters often require repeated attempts at correct placement causing injury to adjacent structures or infusions into inappropriate spaces. Existing catheter insertion methods ...

Bassett, Erik K

2008-01-01T23:59:59.000Z

196

Brigham Young University Geology Studies Volume 28, Part 3  

E-Print Network (OSTI)

, Southern Pavant Range, Utah December 1981 12-81600 52593 #12;CONTENTS Three Creeks Caldera. Southern Pavant Range. Utah ..............................................Dacite of Shauntie Hills ............................................Needles Range Formation Wah Wah

Seamons, Kent E.

197

Mixed Mode Fuel Injector And Injection System  

DOE Patents (OSTI)

A fuel injector includes a homogenous charge nozzle outlet set and a conventional nozzle outlet set that are controlled respectively by first and second three way needle control valves. Each fuel injector includes first and second concentric needle valve members. One of the needle valve members moves to an open position for a homogenous charge injection event, while the other needle valve member moves to an open position for a conventional injection event. The fuel injector has the ability to operate in a homogenous charge mode with a homogenous charge spray pattern, a conventional mode with a conventional spray pattern or a mixed mode.

Stewart, Chris Lee (Normal, IL); Tian, Ye (Bloomington, IL); Wang, Lifeng (Normal, IL); Shafer, Scott F. (Morton, IL)

2005-12-27T23:59:59.000Z

198

Tool for Breast Cancer Research -Reducing the need for Biopsy  

Researchers at the Department of Energy’s Thomas ... junction with a commercially available x-ray guidance system for stereotactically guided core needle breast

199

Precipitation in Multi-Component Ni-Base Superalloys  

Science Conference Proceedings (OSTI)

perchloric acid and 75% acetic acid to sharp needle-shaped specimens initially, with subsequent treatment in 2% perchloric acid in butoxyethanol. Atom-probe ...

200

Does phentolamine mesylate reverse soft-tissue anesthesia after 3% mepivacaine?  

E-Print Network (OSTI)

OF CALIFORNIA Los Angeles Does phentolamine mesylate reverseABSTRACT OF THE THESIS Does phentolamine mesylate reversein which the needle does not penetrate the tissues) using

Silvera, Andreia Minasian

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Effects of internal mixing and aggregate morphology on optical properties  

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

3 3 Authors Scarnato, Barbara V., Sanaz Vahidinia, D. T. Richard, and Thomas W. Kirchstetter Journal Atmospheric Chemistry and Physics Volume 13 Start Page 5089 Issue 10 Pagination 5089 - 5101 Date Published 05/2013 Abstract According to recent studies, internal mixing of black carbon (BC) with other aerosol materials in the atmosphere alters its aggregate shape, absorption of solar radiation, and radiative forcing. These mixing state effects are not yet fully understood. In this study, we characterize the morphology and mixing state of bare BC and BC internally mixed with sodium chloride (NaCl) using electron microscopy and examine the sensitivity of optical properties to BC mixing state and aggregate morphology using a discrete dipole approximation model (DDSCAT). DDSCAT is flexible in simulating the geometry and refractive index of particle aggregates. DDSCAT predicts a higher mass absorption coefficient (MAC), lower single scattering albedo (SSA), and higher absorption Angstrom exponent (AAE) for bare BC aggregates that are lacy rather than compact. Predicted values of SSA at 550 nm range between 0.16 and 0.27 for lacy and compact aggregates, respectively, in agreement with reported experimental values of 0.25 ± 0.05. The variation in absorption with wavelength does not adhere precisely to a power law relationship over the 200 to 1000 nm range. Consequently, AAE values depend on the wavelength region over which they are computed. The MAC of BC (averaged over the 200-1000 nm range) is amplified when internally mixed with NaCl (100-300 nm in radius) by factors ranging from 1.0 for lacy BC aggregates partially immersed in NaCl to 2.2 for compact BC aggregates fully immersed in NaCl. The SSA of BC internally mixed with NaCl is higher than for bare BC and increases with the embedding in the NaCl. Internally mixed BC SSA values decrease in the 200-400 nm wavelength range, a feature also common to the optical properties of dust and organics. Linear polarization features are also predicted in DDSCAT and are dependent on particle size and morphology.

202

Effects of internal mixing and aggregate morphology on optical properties  

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

Effects of internal mixing and aggregate morphology on optical properties Effects of internal mixing and aggregate morphology on optical properties of black carbon using a discrete dipole approximation model Title Effects of internal mixing and aggregate morphology on optical properties of black carbon using a discrete dipole approximation model Publication Type Journal Article Year of Publication 2013 Authors Scarnato, B., S. Vahidinia, D. T. Richard, and Thomas W. Kirchstetter Journal Atmospheric Chemistry and Physics Volume 12 Pagination 26401-26434 Abstract According to recent studies, internal mixing of black carbon (BC) with other aerosol materials in the atmosphere alters its aggregate shape, absorption of solar radiation, and radiative forcing. These mixing state effects are not yet fully understood. In this study, we characterize the morphology and mixing state of bare BC and BC internally mixed with sodium chloride (NaCl) using electron microscopy and examine the sensitivity of optical properties to BC mixing state and aggregate morphology using a discrete dipole approximation model (DDSCAT). DDSCAT predicts a higher mass absorption coefficient, lower single scattering albedo (SSA), and higher absorption Angstrom exponent (AAE) for bare BC aggregates that are lacy rather than compact. Predicted values of SSA at 550 nm range between 0.18 and 0.27 for lacy and compact aggregates, respectively, in agreement with reported experimental values of 0.25 ± 0.05. The variation in absorption with wavelength does not adhere precisely to a power law relationship over the 200 to 1000 nm range. Consequently, AAE values depend on the wavelength region over which they are computed. In the 300 to 550 nm range, AAE values ranged in this study from 0.70 for compact to 0.95 for lacy aggregates. The SSA of BC internally mixed with NaCl (100-300 nm in radius) is higher than for bare BC and increases with the embedding in the NaCl. Internally mixed BC SSA values decrease in the 200-400 nm wavelength range, a feature also common to the optical properties of dust and organics. Linear polarization features are also predicted in DDSCAT and are dependent on particle morphology. The bare BC (with a radius of 80 nm) presents in the linear polarization a bell shape feature, which is a characteristic of the Rayleigh regime (for particles smaller than the wavelength of incident radiation). When BC is internally mixed with NaCl (100-300 nm in radius), strong depolarization features for near-VIS incident radiation are evident, such as a decrease in the intensity and multiple modes at different angles corresponding to different mixing states.

203

1  

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

Fine and Coarse Mode Aerosols in Southern Great Plains Fine and Coarse Mode Aerosols in Southern Great Plains Multi-Filter Rotating Shadowband Radiometer Datasets M. Alexandrov and B. Cairns Columbia University New York, New York M. Alexandrov, B E. Carlson, A.A. Lacis, and B. Cairns National Aeronautics and Space Administration Goddard Institute for Space Studies New York, New York Introduction We present results obtained using the new version of the multi-filter rotating shadowband radiometer (MFRSR) data analysis algorithm (Alexandrov et al. 2005). This algorithm allows the partition of aerosol optical thickness (AOT) into fine and coarse aerosol modes and to retrieve the fine mode effective radius (r eff ). A bimodal gamma distribution is used as the aerosol particle size model. The algorithm has been used for analysis of a multi-year dataset from the local MFRSR network at the

204

ARM - Publications: Science Team Meeting Documents: Using EOF analysis to  

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

Using EOF analysis to uncover inhomogeneities in data from ground-based Using EOF analysis to uncover inhomogeneities in data from ground-based aerosol monitoring devices Gianelli, Scott NASA/GISS Carlson, Barbara NASA/Goddard Institute for Space Studies Lacis, Andrew NASA/Goddard Institute for Space Studies Empirical Orthogonal Function (EOF) analysis is performed on ground-based shadowband and sun photometer data. The instruments examined for this study include the Rotating Shadowband Spectroradiometer (RSS) and the CIMEL sun photometer CSPHOT located at the central facility of the Southern Great Plains (SGP) site; networks of Multi-Filter Rotating Shadowband Radiometer (MFRSR) devices sponsored by ARM and the USDA; and the network of nephelometers and aerosol particle counters of the Climate Monitoring Diagnostics Laboratory (CMDL). The original purpose of this investigation

205

Evaluation Project 4492  

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

6-09-2011 NNSA-B-11-0229 6-09-2011 NNSA-B-11-0229 Sandia National Laboratories/New Mexico (SNL/NM) proposes to install 7 new storm-water monitoring stations at various sites east of Technical Areas II and IV. Five of the 7 new monitoring points would be "in-ground samplers." These locations would be manually dug using hand tools (shovels, posthole digger, bars, etc.) to install the samplers. Each monitoring point would be 24 inches (in). deep by 18 in. in diameter. A 12-inch diameter PVC pipe would be placed in the ground to house the storm water collection device. The remaining two samplers would be portable and would not require any excavation. âś– Sandia Site Office Installation of 7 New Storm Water Monitoring Stations TA 4 Escarpment/Tijeras Arroyo LACY,SUSAN DOYLENE

206

Final Supplement Analysis for the Site-Wide Environmental Impact Statement for the Sandia National Laboratories, Sandia, New Mexico  

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

81-SA-04 81-SA-04 Final Supplement Analysis for the Final Site-Wide Environmental Impact Statement for Sandia National Laboratories/New Mexico August 2006 U.S. Department of Energy National Nuclear Security Administration Sandia Site Office This page intentionally left blank COVER SHEET RESPONSIBLE AGENCY: U.S. DEPARTMENT OF ENERGY/NATIONAL NUCLEAR SECURITY ADMINISTRATION TITLE: Final Supplement Analysis for the Final Site-Wide Environmental Impact Statement for Sandia National Laboratories/New Mexico (DOE/EIS-0281-SA-04) CONTACT: For further information concerning this Supplement Analysis, contact Ms. Susan Lacy Environmental Team Leader Sandia Site Office National Nuclear Security Administration P. O. Box 5400 Albuquerque, New Mexico 87185-5400 Phone: (505) 845-5542

207

Observed Surface Reflectance Distributions in the Southern Great Plains During ALIVE  

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

Surface Reflectance Distributions Surface Reflectance Distributions in the Southern Great Plains During ALIVE Kirk Knobelspiesse 1 , Brian Cairns 1 , Andrew Lacis 2 , Mikhail Alexandrov 2 , Barbara Carlson 2 and Beat Schmid 3 1 Department of Applied Physics and Applied Mathematics, Columbia University 2 NASA Goddard Institute for Space Studies 3 Pacific Northwest National Laboratory * Surface albedo can be measured from the ground with broadband instruments. * Albedo can be measured from space if the atmospheric effect is removed and many view geometries are available. The measured Bidirectional Reflectance Distribution Function (BRDF) is angularly integrated to compute the albedo. * Studies of the former (Yang, 2006) and the latter (Liang et al. 2005; Wang et al. 2006) do not always agree.

208

Analysis of Langley optical depth data, with aerosol and gas retrievals,  

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

Analysis of Langley optical depth data, with aerosol and gas retrievals, Analysis of Langley optical depth data, with aerosol and gas retrievals, for the RSS 103 instrument in Barrow, Alaska Gianelli, Scott Columbia University - NASA/GISS Lacis, Andrew NASA/Goddard Institute for Space Studies Carlson, Barbara NASA/Goddard Institute for Space Studies Category: Aerosols Bimodal aerosol retrievals, and high-resolution retrevals of nitrogen dioxide, are performed on the Langley optical depth data from the RSS 103 device that was situated in Barrow, Alaska between March and August in 1999. The results show a higher fine mode aerosol optical depth on average than was retrieved by the RSS 102 at the SGP site. The seasonal cycle is also reversed with high values at Barrow occurring in the spring and low values in the summer. The fine mode effective radius also appears to

209

Cloudy Skies  

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

Analysis of Cloud Radiative Forcing andFeedback Analysis of Cloud Radiative Forcing andFeedback in a Climate General Circulation Model A. A. lacis NASA Goddard Space Flight Center Institute for Space Studies New York, NY 10225 The principal objectives of the Atmospheric Radiation Measurement (ARM) Program research at the Goddard Institute for Space Studies (GISS) are 1) to improve and validate the radiation parameterizations in the GISS general circulation model (GCM) through model intercomparisons with line-by-line calculations and through comparisons with ARM observations, 2) to improve the GCM diagnostic output to enable more effective comparisons to global cloud/radiation data sets, and 3) to use ARM Cloud and Radiation Testbed (CART) data to develop improved parameterization of clouds in the GCM and to study the

210

alexandrov-98.pdf  

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

Analysis of the MFRSR Data from SGP and NYC Sites Analysis of the MFRSR Data from SGP and NYC Sites M. D. Alexandrov, A. A. Lacis, B. E. Carlson, and B. Cairns NASA-Goddard Institute for Space Studies New York, New York Introduction Aerosols can affect the climate both directly and indirectly and are considered to be the largest source of uncertainty in defining the anthropogenic contribution to global radiative forcing of climate during the past century, and of the projected forcing of climate change in the future. Satellite measurements with sufficient accuracy to monitor the climatic forcing by aerosols [except for the Stratospheric Aerosol and Gas Experiment (SAGE II) measurements of volcanic aerosols] will not be available for years to come; thus, it is important to make better use of those measurements that are currently available. Multi-filter

211

Section 85  

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

i i ' -ln I i I 0 i *µ%c i µ, c i Wm &2 c i NO 2 O 3 NO 2 c i c i NO 2 Session Papers 379 (1) Retrieval of Aerosol Optical Depth, Aerosol Size Distribution Parameters, Ozone and Nitrogen Dioxide Column Amounts from Multifilter Rotating Shadowband Radiometer Data M. Alexandrov, A. A. Lacis, B. E. Carlson and B. Cairns National Aeronautics and Space Administration Goddard Institute for Space Studies New York, New York Introduction The MultiFilter Rotating Shadowband Radiometer (MFRSR) (Harrison and Michalsky 1994a, 1994b) measures atmospheric column extinction of the direct solar beam and the diffuse radiation intensity at six wavelengths. Located at the National Aeronautics and Space Administration's Goddard Institute for Space Studies in New York City, the instrument has six spectral channels at 415, 501, 616, 672, 870, and 940

212

Los Angeles CleanTech Incubator to Host Event With Senior Energy Department  

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

Los Angeles CleanTech Incubator to Host Event With Senior Energy Los Angeles CleanTech Incubator to Host Event With Senior Energy Department Official Dr. Arun Majumdar Los Angeles CleanTech Incubator to Host Event With Senior Energy Department Official Dr. Arun Majumdar January 30, 2012 - 4:40pm Addthis Washington, D.C. - As part of the Energy Department's ongoing efforts to highlight President Obama's State of the Union address and discuss the Obama Administration's commitment to American energy resources and innovation, tomorrow, Tuesday, January 31, Acting Under Secretary of Energy Arun Majumdar will participate in a roundtable discussion with clean technology businesses. The roundtable will be hosted by the Los Angeles CleanTech Incubator (LACI), a non-profit organization working to accelerate the development of clean energy start-ups, and will include a discussion on

213

Section 14  

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

An Analysis of Ground-Based Polarimetric An Analysis of Ground-Based Polarimetric Sky Radiance Measurements B. Cairns Columbia University New York, New York B. E. Carlson and A. A. Lacis NASA/Goddard Institute for Space Studies New York, New York E. Russell Spectir Corporation Goleta, California Abstract An analysis of polarimetric sky radiance measurements made with the engineering model of the Galileo photopolarimeter/radiometer at wavelengths of 410 nm and 678 nm is presented. The polarization measurements are accurate to within 0.1%, while the radiance measurements have no absolute calibration, but are linear over a wide dynamic range. The measurements analyzed are almucantar scans made in Goleta, California, which has a well-defined marine boundary layer. A two-layer model of the atmosphere was therefore used in which a Rayleigh scattering gas layer is

214

AERONET CIMEL Data Scott M. Gianelli  

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

Bimodal Aerosol Size Distributions at SGP Using RSS 105 and Bimodal Aerosol Size Distributions at SGP Using RSS 105 and AERONET CIMEL Data Scott M. Gianelli a,b , Andrew A. Lacis b , and Barbara E. Carlson b a. Columbia University, New York, NY b. NASA Goddard Institute for Space Studies, New York, NY Abstract: Bimodal aerosol retrievals are performed on optical depth data obtained from the RSS 105 and CIMEL located at SGP between 2003 and 2005, and compared to the size distribution retrievals obtained from the CIMEL data using the Dubovik and King [2000] algorithm. Significant differences in how the total aerosol optical thickness (AOT) is separated into coarse and fine modes are observed when the different algorithms are both applied to the CIMEL data, and differences in the measured optical depths between the

215

1  

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

Improving GCM Aerosol Climatology using Satellite and Improving GCM Aerosol Climatology using Satellite and Ground-Based Measurements L. Liu Department of Applied Physics and Applied Mathematics Columbia University New York, New York A.A. Lacis, B.E. Carlson, M.I. Mishchenko, and B. Cairns NASA Goddard Institute for Space Studies New York, New York Abstract A physically based aerosol climatology is essential to address the questions of global climate changes. We use available satellite and ground-based measurements, i.e., moderate-resolution imaging spectroradiometer (MODIS), multiangle imaging spectroradiometer (MISR), Polarization and Directionality of the earth's Reflectance (POLDER), advanced very high resolution radiometer (AVHRR), and Aerosol Robotic Network (AERONET) data, to characterize the geographic distribution

216

ARM - Publications: Science Team Meeting Documents  

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

Parameterization of Hygroscopic Aerosols in a Climate GCM Parameterization of Hygroscopic Aerosols in a Climate GCM Lacis, A.A., Mishchenko, M.I., and Carlson, B.E., Goddard Institute for Space Studies Twelfth Atmospheric Radiation Measurement (ARM) Science Team Meeting Real and imaginary refractive indices are needed over the full range of solar and thermal wavelengths in order to compute the radiative forcing due to atmospheric aerosols. Laboratory measurements are available for dry ammonium sulfate [Toon and Pollack, 1976] over the spectral range 0.3 – 40 ?m, and for dry sea salt [Shettle and Fenn, 1979; Nilsson, 1979; both based on Volz, 1972 measurements] over 0.2 – 40 ?m. Partial spectrum measurements from 0.7 to 2.6 ?m of the imaginary refractive index of ammonium sulfate and ammonium nitrate are also available [Gosse et al.,

217

SNL/CA Supplement Analysis  

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

22-SA-01 22-SA-01 Supplement Analysis for the Final Site-Wide Environmental Assessment for Sandia National Laboratories/California [September 2012] U.S. Department of Energy National Nuclear Security Administration Sandia Site Office This page intentionally left blank COVER SHEET RESPONSIBLE AGENCY: U.S. DEPARTMENT OF ENERGY/NATIONAL NUCLEAR SECURITY ADMINISTRATION TITLE: Supplement Analysis for the Final Site-Wide Environmental Assessment for Sandia National Laboratories/California (DOE/EA-1422-SA-01) CONTACT: For further information concerning this Supplement Analysis, contact Ms. Susan Lacy Environmental Team Leader Sandia Site Office National Nuclear Security Administration P. O. Box 5400, MS 0184 Albuquerque, New Mexico 87185-5400 Phone: (505) 845-5542

218

ARM - Publications: Science Team Meeting Documents  

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

Scale Analysis of Spatial and Temporal Variability of Aerosol Optical Scale Analysis of Spatial and Temporal Variability of Aerosol Optical Properties Over the SGP Site based on MFRSR and MODIS Data Alexandrov, M.D.(a,b), Marshak, A.(b), Cairns, B.(a,b), Lacis, A.A.(b), and Carlson, B.E.(b), Columbia University (a), NASA (b) Thirteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting We present scale-by-scale analysis of variability of atmospheric aerosol optical thickness (AOT) and (preliminary) of the Angstrom exponent. This analysis is based on retrievals from Multi-Filter Rotating Shadowband Radiometers (MFRSRs) and from Moderate Resolution Imaging Spectroradiometer (MODIS) satellite data. This type of analysis has been applied to a remote sensing aerosol dataset for the first time. The MFRSR data were collected

219

ARM - Publications: Science Team Meeting Documents  

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

Passive Remote Sensing of Aerosol Properties from Aircraft Measurements Passive Remote Sensing of Aerosol Properties from Aircraft Measurements Over the SGP Cairns, B. (a), Lacis, A.A. (b), Carlson, B.E. (b), Alexandrov, A. (a), and Barnard, J.C. (c), Columbia University (a), NASA Goddard Institute for Space Studies (b), Pacific Northwest National Laboratory (c) Eleventh Atmospheric Radiation Measurement (ARM) Science Team Meeting The principal difficulties in retrieving aerosol loadings and microphysical properties using passive remote sensing measurements over land surfaces are the significant spectral and spatial variations in the observed intensities that are caused by the land surface. The may also be of use in remote sensing of the surface, being indicative of its roughness, or in the case of vegetation its leaf inclination distribution. It is believed that the

220

ARM - Publications: Science Team Meeting Documents  

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

Evaluation of Remote Sensing of the Single Scattering Albedo of Aerosols Evaluation of Remote Sensing of the Single Scattering Albedo of Aerosols During the Aerosol IOP Cairns, B.(a), Gianelli, S.M.(a), Carlson, B.E.(b), and Lacis, A.A.(b), Columbia University (a), NASA GISS (b) Fourteenth Atmospheric Radiation Measurement (ARM) Science Team Meeting It has long been known that diffuse sky radiance and irradiance measurements are sensitive to the single scattering albedo of aerosols. The main difficulties in exploiting this sensitivity to try and remotely estimate the single scattering albedo of aerosols are uncertainties in the albedo and bidirectional reflectance distribution function of the surface and uncertainties in the calibration of the instruments used to make the measurements. The surface albedo measurements that are currently being

Note: This page contains sample records for the topic "dendrite lacy needle" 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

cairns-98.pdf  

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

5 5 Estimating Aerosol Absorption, Optical Depth, and Vertical Extent Using Satellite Measurements in the UV/Blue Spectral Domain B. Cairns., A. A. Lacis, and B. E. Carlson NASA-Goddard Institute for Space Studies New York, New York Introduction Until recently, the retrieval of aerosol absorption properties from space seemed so prone to error as to be almost worthless. The principal difficulty being that if the aerosol optical depth is relatively low, then the signal measured at the satellite is proportional to ωτP(θ), where ω is the single- scattering albedo, τ is the optical depth and θ is the scattering angle. It is, therefore, impossible to separate variations in optical depth from variations in single- scattering albedo. However, the development of a method

222

Section 71  

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

Modeling Errors in Diffuse-Sky Radiation Modeling Errors in Diffuse-Sky Radiation A. A. Lacis, J. Chowdhary, B. Cairns and M. I. Mishchenko NASA/Goddard Institute for Space Studies New York, New York Most current methods for calculating radiative transfer treat radiance errors to the point where no one has seriously light as a scalar quantity, even though it is well known that a worried about the adequacy of the scalar approximation in proper description of light requires explicit recognition of its radiative transfer modeling. Moreover, the nature of radiative electromagnetic nature. According to the Maxwell equations, modeling in many climate-related applications is in terms of the electromagnetic radiation field possesses vector properties relative differences, or ratios of radiative fluxes, further

223

Integrated Study of MFRSR-derived Parameters of Atmospheric Aerosols and Trace Gases Over the ARM CART Site Extended Facili...  

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

Integrated Study of MFRSR-Derived Parameters of Integrated Study of MFRSR-Derived Parameters of Atmospheric Aerosols and Trace Gases Over the ARM CART Site Extended Facilities - Comparison with Satellite and Other Ground-Based Measurements M. D. Alexandrov and B. Cairns Columbia University National Aeronautics and Space Administration Goddard Institute for Space Studies New York, New York A. A. Lacis and B. E. Carlson National Aeronautics and Space Administration Goddard Institute for Space Studies New York, New York Comparison of SGP MFRSR Network Aerosol Retrievals with MODIS Aerosol Product The network of Multi-filter Rotating Shadowband Radiometers (MFRSRs) at the Atmospheric Radiation Measurement (ARM) Program Cloud and Radiation Testbed (CART) site consists of 21 instrument sites

224

1  

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

Inversion of Multi-Angle Radiation Measurement Inversion of Multi-Angle Radiation Measurement B. Cairns and M. Alexandrov Columbia University New York, New York A. Lacis and B. Carlson National Aeronautics and Space Administration - Goddard Institute for Space Studies New York, New York Motivation Observations of the polarization and reflectance in bands at 865 nm (negligible liquid water absorption) and 2250 nm (strong liquid water absorption) cannot be fitted by a simple atmospheric model consisting of a homogeneous cloud with a single particle size. If we use the polarization (polarized reflectance) measurements and the reflectance measurements to retrieve cloud particle size independently, we find that it is frequently (although not always) the case that the size retrieved with the polarization measurements is larger than the size retrieved using the

225

1  

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

Building Climatologies of Atmospheric Aerosols, Building Climatologies of Atmospheric Aerosols, Trace Gases, and Water Vapor on the Basis of MFRSR Remote Sensing Retrievals M. D. Alexandrov, A. A. Lacis, B. E. Carlson, and B. Cairns Columbia University National Aeronautics and Space Administration Goddard Institute for Space Studies New York, New York Introduction Atmospheric (and especially tropospheric) aerosols with their direct and indirect radiative forcing remain the source of one of the most significant uncertainties in climate change modeling. Retrieval of aerosol spatial and temporal distribution on a global scale is a task for current and future satellite measurements [such as advanced very high-resolution radiometer (AVHRR), Total Ozone Mapping Experiment Spectrometer (TOMS), moderate resolution imaging spectroradiometer (MODIS), MISR,

226

Technical Sessions  

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

Analysis of Cloud Radiative Forcing and Feedback in a Analysis of Cloud Radiative Forcing and Feedback in a Climate General Circulation Model A. Lacis NASA Goddard Space Flight Center Institute for Space Studies New York, NY 10025 and diffuse transmission as a function of solar zenith angle, optical depth, cloud particle size, and single scatter- ing albedo. These results will replace the current approach which uses the "Single Gauss Point" doubling algorithm to obtain cloud radiative properties. However, the stack of homogeneous layers that make up the atmospheric col- umn will be "added" using the Single Gauss Point adding algorithm with the "extra angle" formulation used to model the solar zenith angle dependence. The interpolation tables are being constructed to reproduce the Mie scatter-

227

1  

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

ALIVE Polarization Measurements ALIVE Polarization Measurements B. Cairns, K. Knobelspiesse, and M. Alexandrov Columbia University New York, New York A. Lacis and B. Carlson National Aeronautics and Space Administration-Goddard Institute for Space Studies Greenbelt, Maryland Atmospheric Correction The usual way that polarized reflectance measurements are corrected for the contribution of the surface is to assume that the contribution from the surface to the upwelling radiance at the surface or top of the atmosphere can be modeled simply as a direct beam interaction with the surface. The direct beam interaction is corrected for diffuse transmission effects by using a scaled optical depth where the scale factor is determined empirically. Figure 1 shows how well this approach works for a solar zenith angle

228

ARM - Publications: Science Team Meeting Documents  

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

Aerosol Absorption, Optical Depth and Vertical Extent Estimates Using Aerosol Absorption, Optical Depth and Vertical Extent Estimates Using UV/blue Satellite Measurements Cairns, B., and Alexandrov, M.D., Columbia University; Carlson, B.E., and Lacis, A.A., NASA Goddard Institute for Space Studies Eighth Atmospheric Radiation Measurement (ARM) Science Team Meeting The radiative balance of the atmosphere and the climatological response of the atmospheric circulation to changes in aerosol loading is principally determined by the vertical extent and single-scatter albedo of the aerosols. Although UV radiance measurements made by the Total Ozone Mapping Experiment Spectrometer (TOMS) instrument have been used to detect UV absorbing aerosols and estimate their properties, the unknown verticalextent of the aerosol affects the sensitivity of the radiances to

229

Section 33  

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

in in ' c n I o n exp (&T in / µ i ) T i,n ' µ i log (I o n / I i,n ) % µ i log (c n ) Session Papers 145 (1) (2) Multi-Spectral Atmospheric Column Extinction Analysis of Multi-Filter Rotating Shadowband Radiometer Measurements A.A. Lacis and B.E. Carlson National Aeronautics and Space Administration/Goddard Institute for Space Studies New York, New York B. Cairns Columbia University National Aeronautics and Space Administration/Goddard Institute for Space Studies New York, New York Abstract MACE Analysis of MFRSR Multi-spectral Atmospheric Column Extinction (MACE) analysis of multi-filter rotating shadowband radiometer (MFRSR) measurements yield detailed time series information on the variations of the column amounts of atmospheric NO 2 and ozone and of aerosol optical depth, including the effective

230

SWEAChapter1  

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

National Nuclear Security Administration (NNSA) TITLE: Final Site-Wide Environmental Assessment (SWEA) for Sandia National Laboratories/California (DOE/EA-1422) CONTACT: For further information concerning the Draft Site-Wide Environmental Assessment (SWEA), contact: Susan Lacy, NEPA Document Manager NNSA, Sandia Site Office P.O. Box 5400, Albuquerque, NM 87185 Telephone: 1-505-845-5542, Fax: 505-845-4710 For further information by way of electronic mail, contact: slacy@doeal.gov Abstract: The NNSA proposes to continue operating Sandia National Laboratories/California (SNL/CA) located in Livermore, California. The NNSA has identified and assessed three alternatives for the operation of SNL/CA: (1) No Action, (2) Planned Utilization and Operations, and (3) Maxi-

231

Los Angeles CleanTech Incubator to Host Event With Senior Energy Department  

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

Angeles CleanTech Incubator to Host Event With Senior Energy Angeles CleanTech Incubator to Host Event With Senior Energy Department Official Dr. Arun Majumdar Los Angeles CleanTech Incubator to Host Event With Senior Energy Department Official Dr. Arun Majumdar January 30, 2012 - 4:40pm Addthis Washington, D.C. - As part of the Energy Department's ongoing efforts to highlight President Obama's State of the Union address and discuss the Obama Administration's commitment to American energy resources and innovation, tomorrow, Tuesday, January 31, Acting Under Secretary of Energy Arun Majumdar will participate in a roundtable discussion with clean technology businesses. The roundtable will be hosted by the Los Angeles CleanTech Incubator (LACI), a non-profit organization working to accelerate the development of clean energy start-ups, and will include a discussion on

232

Simplified clear sky model for direct and diffuse insolation on horizontal surfaces  

DOE Green Energy (OSTI)

A detailed comparison was made between five simple broadband models for clear sky global insolation. Compared models were those of Atwater and Ball, Davies and Hay, Watt, Hoyt, and Lacis and Hansen. A sixth simple model, called the Bird model, has been formulated by using parts of these five models and by comparison with the results from three rigorous radiative transfer codes. All of the simple models provide results that agree within < 10% with the three rigorous codes when the sun is in the zenith position. The Bird and Hoyt models agree within 3% with each other and with the results of the rigorous codes. However, the Bird model is easier to implement and has broader application than the Hoyt model.

Bird, R.E.; Hulstrom, R.L.

1981-02-01T23:59:59.000Z

233

New Idea for Hydraulic Testing Machine with Stress and Strain Rates Controlled and its Realization  

Science Conference Proceedings (OSTI)

Based on the relationship between pressure and flux of thin-walled hole, a new idea is proposed for hydraulic testing machine. Using transducer and computer technique, hydraulic system is formed by SCM(single chip micyoco), needle valve, frequency converter ... Keywords: testing machine, stress rate, strain rate, needle valves

Du Jingqing; Gao Shiqiao; Niu Shaohua

2010-05-01T23:59:59.000Z

234

A novel three-dimensional system to study interactions between endothelial cells and neural cells of the developing central nervous system  

E-Print Network (OSTI)

, the disrupted brain tissue was triturated 10 times with a 10 ml syringe, first through a 19-gauge needle, then through a 21-gauge needle. The brain tissue was then added to a universal 25 ml tube containing 22% bovine serum albumin (BSA), and centrifuged at 1000...

Milner, Richard

2007-01-02T23:59:59.000Z

235

UTILITY BOARD AGENDA INFORMATION ONLY DISCUSSION I  

E-Print Network (OSTI)

for Needles Inability to Comply Mandated Renewables Compliance Percentages: 20% RPS by December 31. 2013 would be required to meet the RPS mandates. Needles is an unrated credit that cannot qualify during a recently adjourned special session of the state legislature and will take effect on December 10

236

The Devil is in the (Implementation) Details: An Empirical Analysis of OAuth SSO Systems  

E-Print Network (OSTI)

for Needles Inability to Comply Mandated Renewables Compliance Percentages: 20% RPS by December 31. 2013 would be required to meet the RPS mandates. Needles is an unrated credit that cannot qualify during a recently adjourned special session of the state legislature and will take effect on December 10

237

Medical School Biomedical Waste  

E-Print Network (OSTI)

Medical School Biomedical Waste Labware, gloves, pipets, pipet tips Stock cultures, bacterial with or without needles, razor blades, scalpel blades) Key: Pathological waste BL1 & BL2 waste (low risk ­ LR) BL2 waste (moderate risk - MR)/BL3 waste Blood Blood Autoclave Needle box Metal Cart Must either bleach

Cooley, Lynn

238

Apparatus for silicon web growth of higher output and improved growth stability  

DOE Patents (OSTI)

This disclosure describes an apparatus to improve the web growth attainable from prior web growth configurations. This apparatus modifies the heat loss at the growth interface in a manner that minimizes thickness variations across the web, especially regions of the web adjacent to the two bounding dendrites. In the unmodified configuration, thinned regions of web, adjacent to the dendrites, were found to be the origin of crystal degradation which ultimately led to termination of the web growth. According to the present invention, thinning adjacent to the dendrites is reduced and the incidence of crystal degradation is similarly reduced.

Duncan, Charles S. (Penn Hills, PA); Piotrowski, Paul A. (Monroeville, PA)

1989-01-01T23:59:59.000Z

239

Apparatus for silicon web growth of higher output and improved growth stability  

Science Conference Proceedings (OSTI)

This disclosure describes an apparatus to improve the web growth attainable from prior web growth configurations. This apparatus modifies the heat loss at the growth interface in a manner that minimizes thickness variations across the web, especially regions of the web adjacent to the two bounding dendrites. In the unmodified configuration, thinned regions of web, adjacent to the dendrites, were found to be the origin of crystal degradation which ultimately led to termination of the web growth. According to the present invention, thinning adjacent to the dendrites is reduced and the incidence of crystal degradation is similarly reduced. 13 figs.

Duncan, C.S.; Piotrowski, P.A.

1989-05-09T23:59:59.000Z

240

Nondestructive Evaluation Modeling as an Integrated Component of ...  

Science Conference Proceedings (OSTI)

... porosity, microstructure size distributions, and foam infiltration fill-factor. ... FiPy: Modeling Phase Transformations in Python ... Phase-Field Simulation of Columnar and Equiaxed Growth of Dendrites during Multiphase Solidification of Alloys.

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Integrated Computational Design of Hot-Tearing Resistant High ...  

Science Conference Proceedings (OSTI)

... optimal characteristics for hot tearing resistance, shrinkage and porosity. ... FiPy: Modeling Phase Transformations in Python ... Phase-Field Simulation of Columnar and Equiaxed Growth of Dendrites during Multiphase Solidification of Alloys.

242

Transformational Materials Science Initiative Review June 29...  

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

Li-air batteries. Opportunities and Challenges Classical Li dendrite growth (Chianelli, Exxon, 1976) GM estimate on HE NMCLi metal system: 540 Whkg, 1050 WhL in cell level...

243

The Chronology of a Microgravity Spaceflight Experiment: IDGE  

Science Conference Proceedings (OSTI)

... (IDGE)—a basic science experiment designed to measure, for a fundamental ..... create the framework on which the critical experimental questions are framed, ... M.E. Glicksman and S.P. Marsh, "The Dendrite," Handbook of Crystal Growth, ...

244

An Analysis of Solidification Path in the Ni-Base Superalloy, CMSX10K  

Science Conference Proceedings (OSTI)

measured dendrite core composition does not correspond to a point on the solidus with ..... References. 1. R. C. Reed, The Superalloys Fundamental and Applications ... Metals Handbook, Metallography, Structures and Phase. Diagrams (Vol.

245

A Graphical Approach to a Model of Neuronal Tree with Variable Diameter  

E-Print Network (OSTI)

We propose a simple graphical approach to steady state solutions of the cable equation for a general model of dendritic tree with tapering. A simple case of transient solutions is also briefly discussed.

Marco Herrera-Valdez; Sergei K. Suslov

2010-12-31T23:59:59.000Z

246

JOM-e 0612: Visualizing Hook and Oscillation Mark Formation in ...  

Science Conference Proceedings (OSTI)

Hooks form by solidification and dendritic growth at the liquid meniscus during the ... Hooks tend to entrap mold slag, floating inclusions, and gas bubbles that often ..... The heavier liquid steel naturally falls into the interfacial channel, displaces ...

247

Sortase-mediated modification of ?DEC205 affords optimization of antigen presentation and immunization against a set of viral epitopes  

E-Print Network (OSTI)

A monoclonal antibody against the C-type lectin DEC205 (?DEC205) is an effective vehicle for delivery of antigens to dendritic cells through creation of covalent ?DEC205–antigen adducts. These adducts can induce antigen-specific ...

Ploegh, Hidde

248

D6: Viscosity of Ethylene Glycol+Water Based Al2O3 Nanofluids ...  

Science Conference Proceedings (OSTI)

However, few studies are available on viscosity of nanofluids especially in presence of ... A12: In Vitro Evaluation of Three-Dimensional PCL-Bioactive Glass Scaffolds .... D22: Phase Field Model of Li Dendrite Formation in Lithium Ion Batteries.

249

The Porcupine  

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

sides and back, from the crown of his head to the end of his short thick tail, he is armored with long, whitish, black-tipped needle-pointed quills, loosely set in his skin. When...

250

Thistles  

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

of St. Andrew", was established in 1540 by King James V of Scotland. Thistles are the armored knights of the vegetable kingdom. Their leaves, bristling with needle-sharp spines,...

251

Isotopes of helium, hydrogen, and carbon as groundwater tracers in aquifers along the Colorado River  

E-Print Network (OSTI)

Survey Data Series. Google.com Maps, 2009 Ground Water Atlasand Yuma highlighted. (Google.com) NEEDLES Eagle Peak 2 kmto furthest from river. (Google.com) BLYTHE 5km Figure 6:

Haber, Samuel Ainsworth

2009-01-01T23:59:59.000Z

252

Biomaterials for protection and repair of the central nervous system  

E-Print Network (OSTI)

An injectable hydrogel for controlled release of methylprednisolone was designed based on the inflammatory response during acute spinal cord injury. The gel is injectable through a small gauge needle, cross-links under ...

Pritchard, Christopher D., (Christopher David)

2012-01-01T23:59:59.000Z

253

Design And Simulation Of An Accurate Breast Biopsy System.  

E-Print Network (OSTI)

??Devarajan, Venkat Core needle biopsy is a non-invasive technique for confirming breast and prostate cancer. Over the years, several non-real time image guided systems have… (more)

Tandon, Sumit

2007-01-01T23:59:59.000Z

254

How do you prove air is matter?  

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

has mass by building a balance. For this, you will need a meter stick, some tape, some string and a sharp needle. Take some of the string and tie one end to the middle of the meter...

255

W e l c o m e t o t h e U n i v e r s i t y o f W a s h i n g t o n s e a t t l e c a m p U s Study Hard, Play Hard  

E-Print Network (OSTI)

visit may include watching an orca whale blow as it surfaces, hearing the roar of sports fans when rainforest. To see as much as possible all at once, visit the Space needle's observation deck for a 360

Anderson, Richard

256

Modeling and characterization of a voice coil motor  

E-Print Network (OSTI)

This thesis describes the development of a voice-coil motor that will allow viscous fluids to be delivered via a portable needle-free injection device. The chosen motor design features opposing magnets whose flux is channeled ...

Brown, Ashley (Ashley A.)

2012-01-01T23:59:59.000Z

257

Dynamics of a pentahepta defect in a hexagonal pattern Tammy Tam, Darrick Ohata, Mingming Wu  

E-Print Network (OSTI)

by an assembly of a pressure needle valve, a pressure regulator and a compressed nitrogen gas tank. The size is calculated and the interactions of two PHDs are considered. To author's knowledge, these theoretical

Wu, Mingming

258

Design and development of a 3D X-ray microscope  

E-Print Network (OSTI)

The rapid development of needle-free injection systems demands better and faster imaging systems, capable of imaging the transient and steady state response of an injection into real tissue. X-ray radiography, x-ray ...

Brayanov, Jordan, 1981-

2006-01-01T23:59:59.000Z

259

Query-based debugging of distributed systems  

E-Print Network (OSTI)

www. eclipse.org. [7] Facebook Downtime Means Real-Lifevelocity/2010/09/24/ facebook-downtime-means-real-life-a Needle in Haystack: Facebook’s photo storage. In OSDI (

Braud, Ryan Evans

2010-01-01T23:59:59.000Z

260

Origin of Compact Triangular Islands in Metal-on-Metal Growth  

Science Conference Proceedings (OSTI)

The microscopic origin of compact triangular islands on close-packed surfaces is identified using kinetic Monte Carlo simulations with energy barriers obtained from density-functional calculations. In contrast to earlier accounts, corner diffusion anisotropy is found to control the shape of compact islands at intermediate temperatures. We rationalize the correlation between the orientation of dendrites grown at low temperatures and triangular islands grown at higher temperatures, and explain why in some systems dendrites grow fat before turning compact.

Bogicevic, Alexander; Lundqvist, Bengt I.; Ovesson, Staffan

1999-07-12T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Valve for controlling flow of cryogenic fluid  

DOE Patents (OSTI)

A valve is provided for accurately controlling the flow of cryogenic fluids such as liquid nitrogen. The valve comprises a combination of disc and needle valves affixed to a valve stem in such a manner that the disc and needle are free to rotate about the stem, but are constrained in lateral and vertical movements. This arrangement provides accurate and precise fluid flow control and positive fluid isolation.

Knapp, P.A.

1995-12-31T23:59:59.000Z

262

Setting up for transgenesis transplantations I. PREPARATION OF REAGENTS AND EQUIPMENT  

E-Print Network (OSTI)

the Harvard Apparatus infusion pump. We use a 3 cc syringe/needle filled with mineral oil. Blunt the needle on the pump to 8.70 mm and run the pump at 0.1 ml/hour. Pump should be prerun for several minutes prior and that positive flow of oil out of the tubing is occurring. · Make p200 tip-tygon tubing assemblages

Kroll, Kristen L.

263

Climate simulations for 1880-2003 with GISS modelE  

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

Climate simulations for 1880-2003 with GISS modelE Climate simulations for 1880-2003 with GISS modelE Title Climate simulations for 1880-2003 with GISS modelE Publication Type Journal Article Year of Publication 2007 Authors Hansen, James E., Makiko Sato, Reto Ruedy, Pushker A. Kharecha, Andrew A. Lacis, Ronald L. Miller, Larissa Nazarenko, Kwok-Wai Ken Lo, Gavin A. Schmidt, Gary L. Russell, Igor D. Aleinov, Susanne E. Bauer, Ellen Baum, Brain Cairns, Vittorio M. Canuto, Mark Chandler, Ye Cheng, Armond Cohen, Anthony Del Genio, Gregory S. Faluvegi, Eric L. Fleming, Andrew D. Friend, Timothy M. Hall, Charles H. Jackman, Jeffrey Jonas, Maxwell Kelley, Nancy Y. Kiang, Dorothy M. Koch, Gordon J. Labow, J. Lerner, Surabi Menon, Tihomir Novakov, Valdar Oinas, Jan Perlwitz, Judith Perlwitz, David H. Rind, Anastasia Romanou, Robert B. Schmunk, Drew T. Shindell, Peter H. Stone, S. Sun, David G. Streets, Nicholas Tausnev, D. Thresher, Nadine Unger, Mao-Sung Yao, and S. Zhang

264

Volatile production during preignition heating. Final technical report, 15 September 1980-30 September 1982  

Science Conference Proceedings (OSTI)

Pulverized coal particles, in a flowing inert nitrogen stream, have been heated by high power Carbon Dioxide Laser. The consequence of such an irradiation have proved to be both novel and surprising as a result of the rapid quenching of primary coal products. It ahs been found that the gas phase yield from such heating (typically, temperatures in excess of 1400 K at rates approx. 2 x 10/sup 5/ K/s) is very small (< 0.2 percent of coal carbon and hydrogen). Analysis of the solid residue has shown the presence of fine lacy particulate chains of material of 0.1 ..mu..m diameter, which appears to be soluble in tetrahydrofuran. The yields of solute were significantly much higher than for raw coals. Molecular weight of the solute material was high, being in the range of 600 to 3000. The above and substantiating evidence point to a new mechanism of high heating rate pyrolysis in which only tar-like materials are produced as primary products from the coal. It is hypothesized that gas phase products are primarily the result of secondary reactions of these primary products in the hot gas environments usually employed by other heating techniques.

Ballantyne, A.; Chou, H.; Flusberg, A.; Neoh, K.; Orozco, N.; Stickler, D.

1983-10-01T23:59:59.000Z

265

Expression Optimization and Inducible Negative Feedback in Cell-Free Systems  

SciTech Connect

Synthetic biology offers great promise to a variety of applications through the forward engineering of biological function. Most efforts in this field have focused on employing living cells. Cell-free approaches, on the other hand, offer simpler and more flexible contexts, but few synthetic systems based on cell-free protein expression have been constructed. Here, we evaluate cell-free regulatory systems based on T7 promoter driven expression, and we demonstrate negative feedback, an essential motif in many natural and engineered systems. First, we characterize variants of TetR and LacI repressible T7 promoters in a cell-free context and examine sequence elements that determine expression efficiency. Then, we explore different approaches for composing regulatory systems, leading to the implementation of inducible negative feedback in E. coli extracts and in the minimal PURE system, which consists of purified proteins necessary for transcription and translation. Our quantitative cell-free component characterizations and demonstration of negative feedback embody important steps on the path to harnessing biological function in a bottom up fashion.

Karig, David K [ORNL; Iyer, Sukanya [ORNL; Simpson, Michael L [ORNL; Doktycz, Mitchel John [ORNL

2012-01-01T23:59:59.000Z

266

Sandia National Labs: Materials Science and Engineering Center: Research &  

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

Accomplishments Accomplishments Patents AWARDS recent awards Most recent award Awards recent awards 2009 R&D 100 award winners: R&D Magazine announced the winners of the R&D 100 Awards Monday, which included five Sandia teams. The awards salute the 100 most technologically significant products introduced into the marketplace over the past year, according to the magazine's website. The Sandia submissions chosen this year, with the principal points of contact, are: John Shelnutt (1815): NanoCoral Dendritic Platinum Nanostructures - NanoCoral(tm) dendritic platinum nanostructures, an innovative nanotechnology for producing platinum catalysts. NanoCoral(tm) dendritic platinum nanostructures. This innovative nanotechnology for producing platinum catalysts offers unique control over

267

Micron-scale droplet deposition on a hydrophobic surface using a retreating syringe  

E-Print Network (OSTI)

Droplet deposition onto a hydrophobic surface is studied experimentally and numerically. A wide range of droplet sizes can result from the same syringe, depending strongly on the needle retraction speed. Three regimes are identified according to the motion of the contact line. In Region I, at slow retraction speeds, the contact line expands and large droplets can be achieved. In Region II, at moderate needle speeds, a quasi-cylindrical liquid bridge forms resulting in drops approximately the size of the needle. Finally, at high speeds (Region III), the contact line retracts and droplets much smaller than the syringe diameter are observed. Scaling arguments are presented identifying the dominant mechanisms in each regime. Results from nonlinear numerical simulations agree well with the experiments, although the accuracy of the predictions is limited by inadequate models for the behavior of the dynamic contact angle.

Qian, Bian; Gagnon, David; Tripathi, Anubhav; Breuer, Kenneth S

2009-01-01T23:59:59.000Z

268

Methods of nanoassembly of a fractal polymer and materials formed thereby  

DOE Patents (OSTI)

The invention relates to the formation of synthesized fractal constructs and the methods of chemical self-assembly for the preparation of a non-dendritic, nano-scale, fractal constructs or molecules. More particularly, the invention relates to fractal constructs formed by molecular self-assembly, to create synthetic, nanometer-scale fractal shapes. In an embodiment, a nanoscale Sierpinski hexagonal gasket is formed. This non-dendritic, perfectly self-similar fractal macromolecule is comprised of bisterpyridine building blocks that are bound together by coordination to 36 Ru and 6 Fe ions to form a nearly planar array of increasingly larger hexagons around a hollow center.

Newkome, George R. (Medina, OH); Moorefield, Charles N. (Akron, OH)

2012-07-24T23:59:59.000Z

269

Photovoltaic Manufacturing Technology, Phase 1, Final report. Final subcontract report, 9 January 1991--14 April 1991  

DOE Green Energy (OSTI)

This report examines the cost-effective manufacture of dendritic-web-based photovoltaic modules. It explains how process changes can increase production and reduce manufacturing costs. Long-range benefits of these improved processes are also discussed. Problems are identified that could impede increasing production and reducing costs; approaches to solve these problems are presented. These approaches involve web growth throughput, cell efficiency, process yield, silicon use, process control, automation, and module efficiency. Also discussed are the benefits of bifacial module design, unique to the dendritic web process.

Easoz, J.R.; Herlocher, R.H. [Westinghouse Electric Corp., Pittsburgh, PA (US)

1991-12-01T23:59:59.000Z

270

Photovoltaic Manufacturing Technology, Phase 1, Final report  

DOE Green Energy (OSTI)

This report examines the cost-effective manufacture of dendritic-web-based photovoltaic modules. It explains how process changes can increase production and reduce manufacturing costs. Long-range benefits of these improved processes are also discussed. Problems are identified that could impede increasing production and reducing costs; approaches to solve these problems are presented. These approaches involve web growth throughput, cell efficiency, process yield, silicon use, process control, automation, and module efficiency. Also discussed are the benefits of bifacial module design, unique to the dendritic web process.

Easoz, J.R.; Herlocher, R.H. (Westinghouse Electric Corp., Pittsburgh, PA (United States))

1991-12-01T23:59:59.000Z

271

Diffusion bonding of Ti coated Zircaloy-4 and 316-L stainless steel  

SciTech Connect

Diffusion bonding of Zircaloy-4 and Type 316-L stainless steel was carried out by coating the joining surfaces with Ti to minimize the interlayer effect. Bonding heat treatments were carried out in vacuum at 1000 deg. C for 4 h and 1050 deg. C for 1 h. The microstructure of the diffusion zone was investigated by scanning electron microscopy and the phases in the diffusion zone were analyzed by energy dispersive spectroscopy. It is observed that Ti coating at the interface produced a dendritic structure in the diffusion zone formed in the Zircaloy-4. The concentration of the dendrites increases with an increase in bonding temperature.

Akhter, J.I. [Physics Division, Pakistan Institute of Nuclear Science and Technology, P. O. Nilore, Islamabad (Pakistan)], E-mail: jiakhter@yahoo.com; Ahmad, M.; Ali, G. [Physics Division, Pakistan Institute of Nuclear Science and Technology, P. O. Nilore, Islamabad (Pakistan)

2009-03-15T23:59:59.000Z

272

Efficient thermal field computation in phase-field models  

Science Conference Proceedings (OSTI)

We solve the phase-field equations in two dimensions to simulate crystal growth in the low undercooling regime. The novelty is the use of a fast solver for the free space heat equation to compute the thermal field. This solver is based on the efficient ... Keywords: Crystal growth, Dendritic solidification, Diffusion equation, Fast solvers, Integral representation, Phase-field, Unbounded domain

Jing-Rebecca Li; Donna Calhoun; Lucien Brush

2009-12-01T23:59:59.000Z

273

Hierarchical electrode architectures for electrical energy storage & conversion.  

DOE Green Energy (OSTI)

The integration and stability of electrocatalytic nanostructures, which represent one level of porosity in a hierarchical structural scheme when combined with a three-dimensional support scaffold, has been studied using a combination of synthetic processes, characterization techniques, and computational methods. Dendritic platinum nanostructures have been covalently linked to common electrode surfaces using a newly developed chemical route; a chemical route equally applicable to a range of metals, oxides, and semiconductive materials. Characterization of the resulting bound nanostructure system confirms successful binding, while electrochemistry and microscopy demonstrate the viability of these electroactive particles. Scanning tunneling microscopy has been used to image and validate the short-term stability of several electrode-bound platinum dendritic sheet structures toward Oswald ripening. Kinetic Monte Carlo methods have been applied to develop an understanding of the stability of the basic nano-scale porous platinum sheets as they transform from an initial dendrite to hole containing sheets. Alternate synthetic strategies were pursued to grow dendritic platinum structures directly onto subunits (graphitic particles) of the electrode scaffold. A two-step photocatalytic seeding process proved successful at generating desirable nano-scale porous structures. Growth in-place is an alternate strategy to the covalent linking of the electrocatalytic nanostructures.

Zavadil, Kevin Robert; Missert, Nancy A.; Shelnutt, John Allen; van Swol, Frank B.

2012-01-01T23:59:59.000Z

274

Available online at http://www.idealibrary.com on doi:10.1006/bulm.2001.0249  

E-Print Network (OSTI)

receptor protein (ORP) in their dendritic membranes (Lancet et al., 1993b,a). Over the past decade $35.00/0 c 2001 Society for Mathematical Biology #12;886 P. L´ansk´y and W. M. Getz ORPs (Buck% of genes in rats and mice code for ORPs, which appears to be even more diverse than genes coding for ligand

Getz, Wayne M.

275

Real-time observation of lithium fibers growth inside a nanoscale lithium-ion battery  

E-Print Network (OSTI)

Real-time observation of lithium fibers growth inside a nanoscale lithium-ion battery Hessam August 2011; accepted 29 August 2011; published online 22 September 2011) Formation of lithium dendrite to observe the real-time nucleation and growth of the lithium fibers inside a nanoscale Li-ion battery. Our

Endres. William J.

276

Lithium/V6O13 cells using silica nanoparticle-based composite electrolyte  

E-Print Network (OSTI)

Lithium/V6O13 cells using silica nanoparticle-based composite electrolyte Yangxing Li, Peter S) both in liquid electrolyte consisting of oligomeric poly(ethyleneglycol)dimethylether'/lithium bis of suppressing lithium dendrite growth due to the rigidity and immobility of the electrolyte structure

Khan, Saad A.

277

Melting Processes and Solidification in Alloys 718-625  

Science Conference Proceedings (OSTI)

much heat loss during teeming.4-6 .... dendritic network which is characteristic of this alloy, interdendritic flow of highly- segregated liquid can ..... F.J. Zanner et al., “Observation of Melt rate as a Function of Arc Power,” Met Trans. 15B, 1984) ...

278

Load- and Displacement-controlled Nanoindentation of Al/a-Si Core ...  

Science Conference Proceedings (OSTI)

Counting dislocations in micro-crystals with coherent x-rays: ex-situ and in-situ studies ... Damage evolution during cyclic tension-tension loading of micron- sized Cu lines at ... on stress evolution in Ta thin films during beta-to-alpha phase transformation ... of Ultra-High Strength Dendritic Tungsten Thermal Barrier Coatings.

279

ChemicalEngineering AnnualReport1996-97  

E-Print Network (OSTI)

." Balsara's solution has been to develop solid polymer electrolytes for lithium-ion batteries of improved batteries with lithium metal electrodes. "Batteries that use lithium metal anodes can have very. Lithium electrodes had been considered for high-energy batteries, but the dendrites prevented a practical

Velev, Orlin D.

280

Issues in Processing by the Liquid-Sn Assisted Directional ...  

Science Conference Proceedings (OSTI)

being located remotely from the cooling bath.[16]. Faster withdrawal ... increased the temperature difference between the hot and cool zones of the furnaces ..... D.G. McCartney and J.D. Hunt, "Measurement of Cell and. Primary Dendrite Arm

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Hydraulic-fracture stimulation treatments at East Mesa, Well 58-30. Geothermal-reservoir well-stimulation program  

DOE Green Energy (OSTI)

East Mesa Well 58-30 was selected for two stimulation treatments: a conventional hydraulic fracture in a deep, low permeability interval, and a dendritic fracture in a shallow, high permeability interval of completion. The well selection, pre-stimulation evaluation, fracture treatment design, and post-stimulation evaluation are presented.

Not Available

1981-02-01T23:59:59.000Z

282

NANOCORALtm R&D 100 Entry  

E-Print Network (OSTI)

, Song, Medforth, Miller, Li (Toyota). 7. US Patent Application #11/840,067, Aug. 16, 2007, DENDRITIC NANOSTRUCTURES FOR FUEL CELLS AND OTHER APPLICATIONS, (Toyota, PCT published), Shelnutt, Miller, Song, Hickner, Medforth, Takahashi (Toyota), Muldoon (Toyota), Kawamura (Toyota), Nagami (Toyota), Li (Toyota). 9. US

283

Magnetic resonance imaging of polymer electrolytes and insertion electrodes.  

DOE Green Energy (OSTI)

This program seeks to better define electrode-electrolyte interfaces and solid-state ion transport mechanisms that are a central feature of fuel cells and advanced electrochemical systems. The goal is to develop a new generation of materials with enhanced energy efficiency and reduced tendency toward dendrite or passive film formation at the electrode-electrolyte interface.

Gerald, R. E., II; Klingler, R. J.; Rathke, J. W.

1999-05-19T23:59:59.000Z

284

Flow-Assisted Alkaline Battery: Low-Cost Grid-Scale Electrical Storage using a Flow-Assisted Rechargeable Zinc-Manganese Dioxide Battery  

SciTech Connect

GRIDS Project: Traditional consumer-grade disposable batteries are made of Zinc and Manganese, 2 inexpensive, abundant, and non-toxic metals. But these disposable batteries can only be used once. If they are recharged, the Zinc in the battery develops filaments called dendrites that grow haphazardly and disrupt battery performance, while the Manganese quickly loses its ability to store energy. CUNY Energy Institute is working to tame dendrite formation and to enhance the lifetime of Manganese in order to create a long-lasting, fully rechargeable battery for grid-scale energy storage. CUNY Energy Institute is also working to reduce dendrite formation by pumping fluid through the battery, enabling researchers to fix the dendrites as they’re forming. The team has already tested its Zinc battery through 3,000 recharge cycles (and counting). CUNY Energy Institute aims to demonstrate a better cycle life than lithium-ion batteries, which can be up to 20 times more expensive than Zinc-based batteries.

2010-09-15T23:59:59.000Z

285

2013 Special Issue: Solution to the inverse problem of estimating gap-junctional and inhibitory conductance in inferior olive neurons from spike trains by network model simulation  

Science Conference Proceedings (OSTI)

The inferior olive (IO) possesses synaptic glomeruli, which contain dendritic spines from neighboring neurons and presynaptic terminals, many of which are inhibitory and GABAergic. Gap junctions between the spines electrically couple neighboring neurons ... Keywords: ANOVA, Cerebellum, Gap junction, Inferior olive, PCA

Miho Onizuka, Huu Hoang, Mitsuo Kawato, Isao T. Tokuda, Nicolas Schweighofer, Yuichi Katori, Kazuyuki Aihara, Eric J. Lang, Keisuke Toyama

2013-11-01T23:59:59.000Z

286

B2: Investigation of Increasing Titanium Dioxide on Structural ...  

Science Conference Proceedings (OSTI)

For investigating the glass structures FTIR spectrometer in 400 – 4000 cm-1 was used. .... D22: Phase Field Model of Li Dendrite Formation in Lithium Ion Batteries ... D6: Viscosity of Ethylene Glycol+Water Based Al2O3 Nanofluids with ...

287

B43: Surface Tension of B2O3 with High Wetting Glass Systems  

Science Conference Proceedings (OSTI)

A12: In Vitro Evaluation of Three-Dimensional PCL-Bioactive Glass Scaffolds Prepared by .... D22: Phase Field Model of Li Dendrite Formation in Lithium Ion Batteries ... D6: Viscosity of Ethylene Glycol+Water Based Al2O3 Nanofluids with

288

IDS: Thermodynamic-kinetic-empirical tool for modelling of solidification, microstructure and material properties  

Science Conference Proceedings (OSTI)

IDS (InterDendritic Solidification) is a thermodynamic-kinetic-empirical tool for simulation of solidification phenomena of steels including phase transformations from melt down to room temperature. In addition, important thermophysical material properties ... Keywords: Continuous casting, Inclusions, Material properties, Microstructure, Solidification

J. Miettinen; S. Louhenkilpi; H. Kytönen; J. Laine

2010-03-01T23:59:59.000Z

289

Test-State Approach to the Quantum Search Problem  

E-Print Network (OSTI)

The search for "a quantum needle in a quantum haystack" is a metaphor for the problem of finding out which one of a permissible set of unitary mappings---the oracles---is implemented by a given black box. Grover's algorithm solves this problem with quadratic speed-up as compared with the analogous search for "a classical needle in a classical haystack." Since the outcome of Grover's algorithm is probabilistic---it gives the correct answer with high probability, not with certainty---the answer requires verification. For this purpose we introduce specific test states, one for each oracle. These test states can also be used to realize "a classical search for the quantum needle" which is deterministic---it always gives a definite answer after a finite number of steps---and faster by a factor of 3.41 than the purely classical search. Since the test-state search and Grover's algorithm look for the same quantum needle, the average number of oracle queries of the test-state search is the classical benchmark for Grover's algorithm.

Arun Sehrawat; Le Huy Nguyen; Berthold-Georg Englert

2011-02-17T23:59:59.000Z

290

Albedo of a Forest Modeled as a Plane with Dense Protrusions  

Science Conference Proceedings (OSTI)

A model is developed that treats, in a simplified way, the reflection of the direct solar radiation by a surface consisting of a soil-plane and protruding vertical plant elements, such as needles of pine trees or stalks of a wheat field. Such a ...

J. Otterman

1984-02-01T23:59:59.000Z

291

Simulations of transonic shock-tube flow with a model micro-cylinder in the driver  

Science Conference Proceedings (OSTI)

A unique hand-held needle-free powder injection system, using a transient shock-tube flow to deliver powder genes and drugs into human skin for a wide range of treatments, has been proposed. In the development of such devices, a strong non-linear phenomenon, ... Keywords: Laminar, Separation, Shock-tube, Simulation, Transition, Turbulence

Yi Liu; Mark A. F. Kendall

2007-02-01T23:59:59.000Z

292

Materials Science and Engineering A 438440 (2006) 11191123 Surface characteristics and biological properties of paclitaxel-embedding  

E-Print Network (OSTI)

, China b Department of Mechanics and Engineering Science, Peking University, Beijing 100871, China, needle wire localisers, orthodontic arch wires, implantable drug delivery system, etc [3]. The specific be eliminated from body as carbon dioxide and water, and PLGA has been increasingly used to delivery drugs [6

Zheng, Yufeng

293

Computed tomography guided localization of clinically occult breast carcinoma-the ''N'' skin guide  

SciTech Connect

Standard computed tomography (CT) can be used for the three-dimensional localization of clinically occult suspicious breast lesions whose exact position cannot be determined by standard mammographic views. A method is described that facilitates accurate preoperative needle localization using CT guidance, once the position of these lesions is defined.

Kopans, D.B.; Meyer, J.E.

1982-10-01T23:59:59.000Z

294

FR Corporate Plan The Research Agency of the Forestry CommissionForest Research  

E-Print Network (OSTI)

devastating tree diseases to putting forests in the front line of mitigating climate change. Some will be lost to new diseases such as Phytophthora ramorum and red band needle blight. Working with Defra, we's lives. Using webinars and other innovative sharing technology helps, but we also need to tell the right

295

Recommended Operating Procedures for the Oxford 10 T Spectromag System  

E-Print Network (OSTI)

a diffusion pump, make sure that the cold trap is always filled with LN (otherwise pump oil could backsteam (located on the top of the magnet). 3. Pump on the outer vacuum chamber (OVC) for at least 24 hrs. If using and the the siphon tube. These are labelled in Fig. 1. 2. Close needle valve. Pump out the LHe reservoir

McCombe, Bruce D.

296

II TEAM/TRAINING III SWIM GEAR  

E-Print Network (OSTI)

SAND+SPORT VI STRENGTH2O CATEGORYSECTION #12;ELITE #12;SWIMWEAR COMPETITION Fast, fluid, sleek AGAINST YOURSELF. HALF TIGHT 6 3 4 1 5 TRI TECH _ 4-needle flat lock construction; streamline HALF TIGHT TRI TOP 1 #12;BRA CONSTRUCTION Internal double layer front, one layer power net mesh

Cromarty, Stuart I.

297

NTIS order #PB93-101749 Recommended Citation:  

E-Print Network (OSTI)

Substance abuse places a significant burden on both our Nation’s citizens and our economy. The high incidence of human immunodeficiency virus (HIV) and acquired immunodeficiency syndrome (AIDS) among injecting drug users through the sharing of needles compound this problem. One-third of all cases of HIV are directly or indirectly linked to needle sharing at a cost to Federal taxpayers in excess of $1 billion during 1992 alone. To reduce the spread of HIV among injecting drug users, their children, and their sexual partners, some health experts including C. Everett Koop, the former Surgeon General of the United States, have proposed altering the design of needles and syringes so they are difficult or impossible to reuse. This study was conducted in response to a request by the Subcommittee on Regulation, Business Opportunities, and Energy of the House Committee on Small Business. We evaluate the likelihood that a redesign of injection equipment would actually reduce HIV infections. We also examine the proposal’s feasibility and some of its implications for the use of needles and syringes within the health care system. This background paper is the ninth in OTA’s series of studies on HIV-related issues. The

Drug Abusers

1992-01-01T23:59:59.000Z

298

Hyperalgesic activity of kisspeptin in mice  

E-Print Network (OSTI)

?l) into the plantar surface of the right hind paw using a 10 ?l luertip-syringe (Hamilton) fitted with a 30-gauge needle. p234 (Sigma- Aldrich, St. Louis, MO) was dissolved in phosphate buf- fered saline (PBS) and injected in a volume of 3 ?l...

Spampinato, Simona; Trabucco, Angela; Biasiotta, Antonella; Biagioni, Francesca; Cruccu, Giorgio; Copani, Agata; Colledge, William H; Sortino, Maria Angela; Nicoletti, Ferdinando; Chiechio, Santina

2011-11-23T23:59:59.000Z

299

Simulation and training of lumbar punctures using haptic volume rendering and a 6DOF haptic device  

E-Print Network (OSTI)

Simulation and training of lumbar punctures using haptic volume rendering and a 6DOF haptic device needle insertion and rotation. An improved haptic volume rendering approach is used to calculate the forces. This approach makes use of label data of relevant structures like skin, bone, muscles or fat

Lübeck, Universität zu

300

Percutaneous Extraction of Cement Leakage After Vertebroplasty Under CT and Fluoroscopy Guidance: A New Technique  

SciTech Connect

Purpose: We report a new minimally invasive technique of extraction of cement leakage following percutaneous vertebroplasty in adults. Methods: Seven adult patients (five women, two men; mean age: 81 years) treated for vertebral compression fractures by percutaneous vertebroplasty had cement leakage into perivertebral soft tissues along the needle route. Immediately after vertebroplasty, the procedure of extraction was performed under computed tomography (CT) and fluoroscopy guidance: a Chiba needle was first inserted using the same route as the vertebroplasty until contact was obtained with the cement fragment. This needle was then used as a guide for an 11-gauge Trocar t'am (Thiebaud, France). After needle withdrawal, a 13-gauge endoscopy clamp was inserted through the cannula to extract the cement fragments. The whole procedure was performed under local anesthesia. Results: In each patient, all cement fragments were withdrawn within 10 min, without complication. Conclusions: This report suggests that this CT- and fluoroscopy-guided percutaneous technique of extraction could reduce the rate of cement leakage-related complications.

Amoretti, Nicolas, E-mail: amorettinicolas@yahoo.fr; Huwart, Laurent, E-mail: huwart.laurent@wanadoo.fr [Centre Hospitalo-Universitaire de Nice, Department of Radiology (France)

2012-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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

V I S I T O R S G U I D E uw.edu/visit  

E-Print Network (OSTI)

are all around. Your visit may include watching an orca whale blow as it surfaces, hearing the roar of a hike into the Olympic rainforest. To see as much as possible all at once, visit the Space Needle@uw.edu hfs.washington.edu/conferences 206.543.7636 Need a room or campus outdoor space for a wedding or event

Hochberg, Michael

302

Workshop on Computational Linguistics for Literature, pages 8487, Montreal, Canada, June 8, 2012. c 2012 Association for Computational Linguistics  

E-Print Network (OSTI)

. Throughout history, we have examples of artists observing each other's works and reprising the same subjects:Matt Flynn. CENTER: HELLA JONGERIUS Sample Blanket Repurposed fabrics,wool,polyester thread, needle to Mary Kahlenberg Wool,linen,vinyl,double weave with discontinuous tabby and manipulated inlay,48" x 56

303

THE CORONA STABILIZATION SYSTEM OF A VAN DE GRAAFF GENERATOR  

E-Print Network (OSTI)

length of the corona needles. Pt = the tank gas pressure. of the corona discharge is the time the charge formé. De ce circuit on peut calculer un facteur de stabilisation S. Les valeurs théoriques du facteur is given. From this diagram a stabilizing factor S can be calculated. A comparison between the theoretical

Paris-Sud XI, Université de

304

Sharp Recanalization for Chronic Left Iliac Vein Occlusion  

Science Conference Proceedings (OSTI)

Endovascular treatment has emerged as a first-line treatment for venous occlusions, but is sometimes challenging with conventional approaches. This article describes a helpful technique using a Roesch-Uchida needle to cross a chronic occlusion of the iliac vein when conventional techniques have failed.

Ito, Nobutake, E-mail: nobutake@rad.med.keio.ac.jp; Isfort, Peter; Penzkofer, Tobias [RWTH Aachen University, Department of Diagnostic and Interventional Radiology, University Hospital (Germany); Grommes, Jochen; Greiner, Andreas [RWTH Aachen University, Department of Vascular Surgery, University Hospital (Germany); Mahnken, Andreas [RWTH Aachen University, Department of Diagnostic and Interventional Radiology, University Hospital (Germany)

2012-08-15T23:59:59.000Z

305

Acoustic detection of partial discharges in insulation oil  

Science Conference Proceedings (OSTI)

In this paper, we performed an insulation diagnosis technique for oil-immersed power transformers by an acoustic detection method. Electrode system such as needle to plane electrode was fabricated to simulate a defect of power transformers. In addition, ... Keywords: acoustic detection, frequency component, insulation diagnostic, partial discharge, positioning

Dae-Won Park; Sang-Wook Cha; Gyung-Suk Kil

2011-03-01T23:59:59.000Z

306

Test-state approach to the quantum search problem  

Science Conference Proceedings (OSTI)

The search for 'a quantum needle in a quantum haystack' is a metaphor for the problem of finding out which one of a permissible set of unitary mappings - the oracles - is implemented by a given black box. Grover's algorithm solves this problem with quadratic speedup as compared with the analogous search for 'a classical needle in a classical haystack'. Since the outcome of Grover's algorithm is probabilistic - it gives the correct answer with high probability, not with certainty - the answer requires verification. For this purpose we introduce specific test states, one for each oracle. These test states can also be used to realize 'a classical search for the quantum needle' which is deterministic - it always gives a definite answer after a finite number of steps - and 3.41 times as fast as the purely classical search. Since the test-state search and Grover's algorithm look for the same quantum needle, the average number of oracle queries of the test-state search is the classical benchmark for Grover's algorithm.

Sehrawat, Arun [Centre for Quantum Technologies, National University of Singapore, Singapore 117543 (Singapore); Nguyen, Le Huy [Centre for Quantum Technologies, National University of Singapore, Singapore 117543 (Singapore); Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore 117597 (Singapore); Englert, Berthold-Georg [Centre for Quantum Technologies, National University of Singapore, Singapore 117543 (Singapore); Department of Physics, National University of Singapore, Singapore 117542 (Singapore)

2011-05-15T23:59:59.000Z

307

Method for fabricating a substrate having spaced apart microcapillaries thereon  

DOE Patents (OSTI)

Methods are disclosed for manufacturing a self-supporting substrate having a plurality of spaced-apart needles (spikes or microcapillaries) projecting upwardly from a major surface of the substrate. In a preferred method, metal is deposited onto a porous membrane such that the metal extends into the pores, after which the membrane is dissolved. 9 figures.

Jarvis, E.E.

1995-01-24T23:59:59.000Z

308

Thermal evolution behavior of carbides and {gamma} Prime precipitates in FGH96 superalloy powder  

SciTech Connect

The characteristics of rapidly solidified FGH96 superalloy powder and the thermal evolution behavior of carbides and {gamma} Prime precipitates within powder particles were investigated. It was observed that the reduction of powder size and the increase of cooling rate had transformed the solidification morphologies of atomized powder from dendrite in major to cellular structure. The secondary dendritic spacing was measured to be 1.02-2.55 {mu}m and the corresponding cooling rates were estimated to be in the range of 1.4 Multiplication-Sign 10{sup 4}-4.7 Multiplication-Sign 10{sup 5} K{center_dot}s{sup -1}. An increase in the annealing temperature had rendered the phase transformation of carbides evolving from non-equilibrium MC Prime carbides to intermediate transition stage of M{sub 23}C{sub 6} carbides, and finally to thermodynamically stable MC carbides. The superfine {gamma} Prime precipitates were formed at the dendritic boundaries of rapidly solidified superalloy powder. The coalescence, growth, and homogenization of {gamma}' precipitates occurred with increasing annealing temperature. With decreasing cooling rate from 650 Degree-Sign C{center_dot}K{sup -1} to 5 Degree-Sign C{center_dot}K{sup -1}, the morphological development of {gamma} Prime precipitates had been shown to proceed from spheroidal to cuboidal and finally to solid state dendrites. Meanwhile, a shift had been observed from dendritic morphology to recrystallized structure between 900 Degree-Sign C and 1050 Degree-Sign C. Moreover, accelerated evolution of carbides and {gamma}' precipitates had been facilitated by the formation of new grain boundaries which provide fast diffusion path for atomic elements. - Highlights: Black-Right-Pointing-Pointer Microstructural characteristic of FGH96 superalloy powder was investigated. Black-Right-Pointing-Pointer The relation between microstructure, particle size, and cooling rate was studied. Black-Right-Pointing-Pointer Thermal evolution behavior of {gamma} Prime and carbides in loose FGH96 powder was studied.

Zhang Lin, E-mail: zhanglincsu@163.com [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); Liu Hengsan, E-mail: lhsj63@sohu.com [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); He Xinbo, E-mail: xb_he@163.com [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); Rafi-ud-din, E-mail: rafiuddi@gmail.com [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); Qu Xuanhui, E-mail: quxh@ustb.edu.cn [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); Qin Mingli, E-mail: mlqin75@hotmail.com [State Key Laboratory for Advanced Metals and Materials, Beijing Key Laboratory for Powder Metallurgy and Particulate Materials, University of Science and Technology Beijing, Beijing, 100083 (China); Li Zhou, E-mail: zhouli621@126.com [National Key Lab of High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing, 100095 (China); Zhang Guoqing, E-mail: g.zhang@126.com [National Key Lab of High Temperature Structural Materials, Beijing Institute of Aeronautical Materials, Beijing, 100095 (China)

2012-05-15T23:59:59.000Z

309

Argonne's pyroprocessing and advanced reactor research featured on WGN  

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

Argonne's pyroprocessing and advanced reactor research featured on WGN Argonne's pyroprocessing and advanced reactor research featured on WGN radio Director's Welcome Organization Achievements Highlights Fact Sheets, Brochures & Other Documents Multimedia Library About Nuclear Energy Nuclear Reactors Designed by Argonne Argonne's Nuclear Science and Technology Legacy Opportunities within NE Division Visit Argonne Work with Argonne Contact us For Employees Site Map Help Join us on Facebook Follow us on Twitter NE on Flickr Celebrating the 70th Anniversary of Chicago Pile 1 (CP-1) Argonne OutLoud on Nuclear Energy Argonne Energy Showcase 2012 Highlights Bookmark and Share Argonne's pyroprocessing and advanced reactor research featured on WGN radio Uranium dendrites These tiny branches, or "dendrites," of pure uranium form when engineers

310

Solid solution lithium alloy cermet anodes  

SciTech Connect

A metal-ceramic composite ("cermet") has been produced by a chemical reaction between a lithium compound and another metal. The cermet has advantageous physical properties, high surface area relative to lithium metal or its alloys, and is easily formed into a desired shape. An example is the formation of a lithium-magnesium nitride cermet by reaction of lithium nitride with magnesium. The reaction results in magnesium nitride grains coated with a layer of lithium. The nitride is inert when used in a battery. It supports the metal in a high surface area form, while stabilizing the electrode with respect to dendrite formation. By using an excess of magnesium metal in the reaction process, a cermet of magnesium nitride is produced, coated with a lithium-magnesium alloy of any desired composition. This alloy inhibits dendrite formation by causing lithium deposited on its surface to diffuse under a chemical potential into the bulk of the alloy.

Richardson, Thomas J.

2013-07-09T23:59:59.000Z

311

Effect of Ultrasonic Treatment on the Microstructure of A201 Aluminium Alloy for Thixoforming  

Science Conference Proceedings (OSTI)

It is known that the introduction of high intensity ultrasonic waves into liquid and solidifying metals leads to a non-dendritic and fine grain structure which is the requirement for semi-solid feedstock production. The effect of vibration time on the semi-solid microstructure of the A201 aluminium alloy billets fabricated with the ultrasonic treatment in the liquid state was studied in this paper. It was observed that the application of ultrasound technology can break up and distribute the dendrites which are present in the as-cast alloy. A suitable thixotropic microstructure with relatively rounded and fine globules could be obtained by ultrasonically treating liquid metal at 690 deg. C for a treatment time of 1 minute, cooling to room temperature and then reheating to the semi-solid state. This shows the ultrasonic treatment could be an economic and alternative route to produce A201 semi-solid feedstock for thixoforming.

Kandemir, Sinan; Atkinson, Helen V.; Lawes, Simon D. A. [Department of Engineering, University of Leicester, University Road, Leicester, LE1 7RH (United Kingdom)

2011-05-04T23:59:59.000Z

312

Design of composite polymer electrolytes for Li ion batteries based on mechanical stability criteria  

Science Conference Proceedings (OSTI)

Mechanical properties and conductivity were computed for several composite polymer electrolyte structures. A multi-phase effective medium approach was used to estimate effective conductivity. The Mori-Tanaka approach was applied for calculating the effective stiffness tensor of the composites. An analysis of effective mechanical properties was performed in order to identify the composite structures, which would be capable of blocking the dendrites forming in Li-ion battery when Li metal is used as anode. The data on conductivity, elastic modulus, and Poisson s ratio can be used to formulate design criteria for solid electrolytes that would exhibit appropriate stiffness and compressibility to suppress lithium dendrite growth while maintaining high effective conductivities.

Kalnaus, Sergiy [ORNL; Sabau, Adrian S [ORNL; Tenhaeff, Wyatt E [ORNL; Daniel, Claus [ORNL; Dudney, Nancy J [ORNL

2012-01-01T23:59:59.000Z

313

Optimal orientation in branched cytoskeletal networks  

E-Print Network (OSTI)

Actin cytoskeletal protrusions in crawling cells, or lamellipodia, exhibit various morphological properties such as two characteristic peaks in the distribution of filament orientation with respect to the leading edge. To understand these properties, using the dendritic nucleation model as a basis for cytoskeletal restructuring, a kinetic-population model with orientational-dependent branching (birth) and capping (death) is constructed and analyzed. Optimizing for growth yields a relation between the branch angle and filament orientation that explains the two characteristic peaks. The model also exhibits a subdominant population that allows for more accurate modeling of recent measurements of filamentous actin density along the leading edge of lamellipodia in keratocytes. Finally, we explore the relationship between orientational and spatial organization of filamentous actin in lamellipodia and address recent observations of a prevalence of overlapping filaments to branched filaments---a finding that is claimed to be in contradiction with the dendritic nucleation model.

D. A. Quint; J. M. Schwarz

2010-08-05T23:59:59.000Z

314

Pine Tree Seed Germination  

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

Pine Tree Seed Germination Pine Tree Seed Germination Name: Debbie Location: N/A Country: N/A Date: N/A Question: I live in an area with many pine trees and pine cones. I would like to start seedlings to replace the older trees as I lose them. How do I do it? I have searched the internet for how but have yet to find an anwser. I've examined the pine cones and am at a loss, where are the seeds? I have soft long needle trees with medium pine cones, I have Hemlock trees with small cones and I have very sharp long needle trees with longer, narrow cones. Do the cones have to have already fallen off the tree before using seeds? Thank you!! Replies: Dear Debbie, The following may be helpful: http://www.uidaho.edu/cfwr/forres/nursery/research/research/projects.htm http://www.walden.org/thoreau/writings/seeds/dispersion_01.htm

315

No Slide Title  

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

1 1 These slides are updated on a monthly basis, as soon as data are reasonably final for the preceding month. Hours worked are estimated monthly and updated with final and actual values quarterly. While every effort is made to present accurate and final data, data may change in subsequent months, as additional information becomes available and as later developments change the recordability of some cases. Refer questions about these charts to rwfisher@lbl.gov 2 Narrative of February 2011 Injury/Illness Cases * Electrical Engineer - Ankle strain - While walking to office after arriving at work in the morning, the employee's knee buckled causing the ankle to roll. * Postdoctoral Fellow - Clean needle puncture of finger - While manipulating a needle attached to a building

316

New Jersey firm creates jobs and vital components for world-leading  

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

Jersey firm creates jobs and vital components for world-leading Jersey firm creates jobs and vital components for world-leading experiment By John Greenwald July 10, 2012 Tweet Widget Facebook Like Google Plus One This superconducting wire will become thin as a needle when Oxford Superconducting Technology finishes manufacturing it. (Photo by Elle Starkman, PPPL Office Of Communications) This superconducting wire will become thin as a needle when Oxford Superconducting Technology finishes manufacturing it. Gallery: Oxford Superconducting begins with a foot-long copper and niobium billet that weighs several hundred pounds. (Photo by Elle Starkman, PPPL Office Of Communications) Oxford Superconducting begins with a foot-long copper and niobium billet that weighs several hundred pounds. The billets are drawn down until more than a dozen can be stacked inside a hollow copper tube like those that General Manager Jeffrey Parrell shows here. He holds a billet-filled tube that has been drawn down some more.

317

Fuel injector system  

DOE Patents (OSTI)

A fuel injection system particularly adapted for injecting coal slurry fuels at high pressures includes an accumulator-type fuel injector which utilizes high-pressure pilot fuel as a purging fluid to prevent hard particles in the fuel from impeding the opening and closing movement of a needle valve, and as a hydraulic medium to hold the needle valve in its closed position. A fluid passage in the injector delivers an appropriately small amount of the ignition-aiding pilot fuel to an appropriate region of a chamber in the injector's nozzle so that at the beginning of each injection interval the first stratum of fuel to be discharged consists essentially of pilot fuel and thereafter mostly slurry fuel is injected.

Hsu, Bertrand D. (Erie, PA); Leonard, Gary L. (Schenctady, NY)

1988-01-01T23:59:59.000Z

318

Silicon web process development. Annual report  

DOE Green Energy (OSTI)

During this reporting period significant milestones have been met. A new barrier crucible design which consistently maintains melt stability over long periods of time has been successfully tested and used in long growth runs. The pellet feeder for melt replenishment was operated continuously for growth runs of up to 17 hours (a one day growth cycle). The liquid level sensor comprising a laser/sensor system was operated, performed well, and meets the requirements for maintaining liquid level height during growth and melt replenishment. An automated feedback loop connecting the feed mechanism and the liquid level sensing system was designed and constructed and, during the preparation of this report, operated successfully for 3 1/2 hours demonstrating the feasibility of semi-automated dendritic web growth. The web throughput task has resulted in a demonstration of wider good quality web as well as a demonstration of higher throughput rates. The accomplishments during the report period are described in detail. The economic analysis of the dendritic web process was updated. The sensitivity of the cost of sheet to variations in capital equipment cost and recycling dendrites was calculated; and it was shown that these factors have relatively little impact on sheet cost. An important finding was that dendrites from web which had gone all the way through the solar cell fabrication process, when melted and grown into web, produce crystals which show no degradation in cell efficiency. Material quality remains high and cells made from web grown at the start, during, and the end of a run from a replenished melt show comparable efficiencies.

Duncan, C.S.; Seidensticker, R.G.; McHugh, J.P.; Hill, F.E.; Skutch, M.E.; Driggers, J.M.; Hopkins, R.H.

1980-06-30T23:59:59.000Z

319

Modification of surface properties of copper-refractory metal alloys  

DOE Patents (OSTI)

The surface properties of copper-refractory metal (CU-RF) alloy bodies are modified by heat treatments which cause the refractory metal to form a coating on the exterior surfaces of the alloy body. The alloys have a copper matrix with particles or dendrites of the refractory metal dispersed therein, which may be niobium, vanadium, tantalum, chromium, molybdenum, or tungsten. The surface properties of the bodies are changed from those of copper to that of the refractory metal.

Verhoeven, J.D.; Gibson, E.D.

1993-10-12T23:59:59.000Z

320

Fracture toughness and crack-resistance curve behavior in metallic glass-matrix composites  

SciTech Connect

Nonlinear-elastic fracture mechanics methods are used to assess the fracture toughness of bulk metallic glass (BMG) composites; results are compared with similar measurements for other monolithic and composite BMG alloys. Mechanistically, plastic shielding gives rise to characteristic resistance?curve behavior where the fracture resistance increases with crack extension. Specifically, confinement of damage by second?phase dendrites is shown to result in enhancement of the toughness by nearly an order of magnitude relative to unreinforced glass.

Launey, Maximilien E.; Hofmann, Douglas C.; Suh, Jin-Yo; Kozachkov, Henry; Johnson, William L.; Ritchie, Robert O.

2009-05-26T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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.


321

Dissipative hydride precipitates in superconducting niobium cavities  

Science Conference Proceedings (OSTI)

We report the first direct observation of the microstructural features exhibiting RF losses at high surface magnetic fields of above 100 mT in field emission free superconducting niobium cavities. The lossy areas were identified by advanced thermometry. Surface investigations using different techniques were carried out on cutout samples from lossy areas and showed the presence of dendritic niobium hydrides. This finding has possible implications to the mechanisms of RF losses in superconducting niobium at all field levels.

Romanenko, A.; Cooley, L.D.; /Fermilab; Ciovati, G.; / /Jefferson Lab; Wu, G.; /Argonne

2011-10-01T23:59:59.000Z

322

Method for forming cooperative binary ionic solids  

DOE Patents (OSTI)

A nanostructured molecular unit and method for forming is described where a cationic porphyrin having an ethanolic substituent species and a metal in the porphyrin cavity is combined with an anionic porphyrin having a sulfonate substituent species and a metal in the porphyrin cavity to form by self-assembly a nanostructured molecular unit with a morphology comprising four dendritic elements connected at a central node.

Shelnutt, John A.; Martin, Kathleen E.; Wang, Zhongchun; Medforth, Craig J.

2013-03-05T23:59:59.000Z

323

High Performance Visualization using Query-Driven Visualizationand Analytics  

Science Conference Proceedings (OSTI)

Query-driven visualization and analytics is a unique approach for high-performance visualization that offers new capabilities for knowledge discovery and hypothesis testing. The new capabilities akin to finding needles in haystacks are the result of combining technologies from the fields of scientific visualization and scientific data management. This approach is crucial for rapid data analysis and visualization in the petascale regime. This article describes how query-driven visualization is applied to a hero-sized network traffic analysis problem.

Bethel, E. Wes; Campbell, Scott; Dart, Eli; Shalf, John; Stockinger, Kurt; Wu, Kesheng

2006-06-15T23:59:59.000Z

324

A novel curvilinear approach for prostate seed implantation  

Science Conference Proceedings (OSTI)

Purpose: A new technique called ''curvilinear approach'' for prostate seed implantation has been proposed. The purpose of this study is to evaluate the dosimetric benefit of curvilinear distribution of seeds for low-dose-rate (LDR) prostate brachytherapy. Methods: Twenty LDR prostate brachytherapy cases planned intraoperatively with VariSeed planning system and I-125 seeds were randomly selected as reference rectilinear cases. All the cases were replanned by using curved-needle approach keeping the same individual source strength and the volume receiving 100% of prescribed dose 145 Gy (V{sub 100}). Parameters such as number of needles, seeds, and the dose coverage of the prostate (D{sub 90}, V{sub 150}, V{sub 200}), urethra (D{sub 30}, D{sub 10}) and rectum (D{sub 5}, V{sub 100}) were compared for the rectilinear and the curvilinear methods. Statistical significance was assessed using two-tailed student's t-test. Results: Reduction of the required number of needles and seeds in curvilinear method were 30.5% (p Dose to the urethra was reduced significantly; D{sub 30} reduced by 10.1% (p dose D{sub 5} was 18.5% (p dose homogeneity (V{sub 150}, V{sub 200}) improved while urethral dose was reduced, which might potentially result in better treatment outcome. Reduction in rectal dose could potentially reduce rectal toxicity and complications. Reduction in number of needles would minimize edema and thereby could improve postimplant urinary incontinence. This study indicates that the curvilinear implantation approach is dosimetrically superior to conventional rectilinear implantation technique.

Podder, Tarun K.; Dicker, Adam P.; Hutapea, Parsaoran; Darvish, Kurosh; Yu Yan [Department of Radiation Oncology, Leo Jenkins Cancer Center, Brody School of Medicine, East Carolina University, Greenville, North Carolina 27834 (United States); Department of Radiation Oncology, Kimmel Cancer Center, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania 19107 (United States); Department of Mechanical Engineering, Temple University, Philadelphia, Pennsylvania 19122 (United States); Department of Radiation Oncology, Kimmel Cancer Center, Jefferson Medical College, Thomas Jefferson University, Philadelphia, Pennsylvania 19107 (United States)

2012-04-15T23:59:59.000Z

325

Energy Innovation Portal Brings DOE Technologies to the Market (Fact Sheet)  

SciTech Connect

For venture capitalists, energy entrepreneurs, and industry veterans, finding the right renewable energy or energy efficiency solution used to be like looking for a needle in a haystack. Now, a searchable treasure trove of innovative U.S. Department of Energy (DOE) technologies is available. Created by the National Renewable Energy Laboratory (NREL), the online Energy Innovation Portal helps businesses and entrepreneurs access the intellectual property of DOE's 17 national laboratories and other research partners.

2011-10-01T23:59:59.000Z

326

Energy Innovation Portal Brings DOE Technologies to the Market (Fact Sheet)  

DOE Green Energy (OSTI)

For venture capitalists, energy entrepreneurs, and industry veterans, finding the right renewable energy or energy efficiency solution used to be like looking for a needle in a haystack. Now, a searchable treasure trove of innovative U.S. Department of Energy (DOE) technologies is available. Created by the National Renewable Energy Laboratory (NREL), the online Energy Innovation Portal helps businesses and entrepreneurs access the intellectual property of DOE's 17 national laboratories and other research partners.

Not Available

2011-10-01T23:59:59.000Z

327

Effects of Carbonate Solvents and Lithium Salts on Morphology and Coulombic Efficiency of Lithium Electrode  

SciTech Connect

The application of lithium (Li) metal anode in rechargeable batteries is hindered by Li dendrite growth during Li deposition and low Li Coulombic efficiency (CE), where the nonaqueous electrolyte plays a critical role. In this work, the effects of different carbonate solvents and Li salts on Li deposition morphology and CE were systematically investigated. Typically cyclic carbonates are found to favor the formation of uniform Li film and improve Li CE than linear carbonates do. Several specific cyclic carbonates that are conventionally used as solid electrolyte interface formation additives in Li ion batteries can also improve the CE of Li anode. Furthermore, among the nine electrolyte salts studied, LiAsF6 and LiBOB lead to the highest CE for Li anode. LiBOB also leads to much smoother Li morphology than other salts do. Considering the better safety of LiBOB as compared to LiAsF6, LiBOB is a promising Li salt for rechargeable Li metal batteries with high CE. By combining the best electrolyte solvent/salt that can lead to high Li CE and novel electrolyte additives that can prevent dendrite formation, it is possible to find an electrolyte that not only prevents Li dendrite formation but also lead to high CE during Li deposition/stripping processes.

Ding, Fei; Xu, Wu; Chen, Xilin; Zhang, Jian; Engelhard, Mark H.; Zhang, Yaohui; Johnson, Bradley R.; Crum, Jarrod V.; Blake, Thomas A.; Liu, Xingjiang; Zhang, Jiguang

2013-09-04T23:59:59.000Z

328

On the evolution of morphology of zirconium sponge during reduction and distillation  

Science Conference Proceedings (OSTI)

High purity zirconium metal is produced by magnesio-thermic reduction of zirconium tetrachloride followed by vacuum distillation. The reduction process is carried out in a batch giving metal sponge and magnesium chloride in the reduced mass. The sponge is purified to using by vacuum distillation. The morphology of the sponge formed during the reduction and its influence on further processing has significant importance. In the present study, a detailed investigation involving evolution of the morphology of sponge particles and its implication during the vacuum distillation was carried out. The study of the microstructure was done using scanning electron microscopy and X-ray diffraction. It is observed that the nascent sponge formed is highly unstable which transforms to a needle-like morphology almost immediately, which further transforms to rounded and finally to a bulk shape. Faceting of the surface and needle-shape formation were observed in these particles, this is probably due to anisotropy in the surface energy. The morphology of the sponge formed during the reduction influences the distillation process. The fine needle-like shape sponge morphology leads to particle ejection, which is explained to be due to curvature effect. This is responsible for the formation of unwanted mass during distillation. XRD line broadening analysis indicates that the individual sponge particles are free from structural defects (dislocation) and are nearly single crystalline in nature.

Kapoor, K. [Nuclear Fuel Complex, Hyderabad, 500 062 (India)], E-mail: kapoork@nfc.ernet.in; Padmaprabu, C.; Nandi, D. [Nuclear Fuel Complex, Hyderabad, 500 062 (India)

2008-03-15T23:59:59.000Z

329

Analysis of Hippocampal Cell Proliferation, Survival, and Neuronal Morphology in P/Q-Type Voltage-Gated Calcium Channel Mutant Mice  

E-Print Network (OSTI)

Tottering and leaner mutant mice carry mutations in the pore-forming subunit (?1A) of P/Q-type (CaV 2.1) voltage-gated calcium ion (Ca2+) channels that result in reduced Ca2+ current density. Since Ca2+ influx via voltage-dependent Ca2+ channels regulates important Ca2+-dependent neuronal processes including neurotransmitter release and synaptogenesis, we assessed effects of these mutations on hippocampus volume, neuronal density, neuronal morphology of hippocampal pyramidal cells in adult (six-month-old) mice, and adult neurogenesis in three-week-old and six-month-old mice. Hippocampal volume and neuronal density were assessed using hematoxylin and eosin stained serial sections. Neuronal morphology was assessed using Golgi-Cox staining as well as ultrastructural assessment using transmission electron microscopy. Adult hippocampal neurogenesis was assessed using standard 5-bromo-2’-deoxyuridine (BrdU) labeling with fluorescent immunohistochemistry (IHC) and proliferating cell nuclear antigen (PCNA) with diaminobenzidine IHC. To determine neuron and astrocyte survival, we used fluorescent double labeling for neurons with BrdU-neuronal nuclei IHC or astrocytes using BrdU-glial fibrillary acidic protein, respectively. Fluoro-Jade histochemistry was used to assess numbers of degenerating cells in the dentate gyrus subgranular zone. Decreased hippocampus volume was observed in tottering female mice and increased dentate hilar and CA1 cell density in mutant mice compared to wild type mice. Cell proliferation was increased in the hilus and combined CA3, CA2 and CA1 regions of mutant mice compared to wild type mice. Decreased total dendritic length and decreased number of dendritic intersections was observed in tottering mice compared to wild type mice. The decrease in dendritic arborization of tottering mice occurred at the concentric circles close to the neuronal cell body indicating that basal dendrites of CA1 pyramidal neurons are reduced. Taken together, P/Q-type voltage gated calcium channel mutation has age variable influence on adult hippocampal cell proliferation, and it altered neuronal morphology in terms of dendritic complexity in tottering mice, while the leaner mutation reduced mitochondrial density.

Nigussie, Fikru

2013-05-01T23:59:59.000Z

330

Prevention of Porosity Formation and Other Effects of Gaseous Elements in Iron Castings  

SciTech Connect

Iron foundries have observed porosity primarily as interdendritic porosity in large freezing range alloys such as Ni-Hard I and hypoeutectic high Cr alloys or pinholes and fissure defects in gray and ductile irons. For most iron foundries, porosity problems occur sporadically, but even occasional outbreaks can be costly since even a very small amount of porosity can significantly reduce the mechanical properties of the castings. As a result when porosity is detected, the castings are scrapped and remelted, or when the porosity is undetected, defective parts are shipped to the consumer. Neither case is desirable. This project was designed to examine various factors contributing to the porosity formation in iron castings. Factors such as solubility of gases in liquid and solid iron alloys, surface tension of liquid iron alloys, and permeability of dendritic structures were investigated in terms of their effect on the porosity formation. A method was developed to predict how much nitrogen the molten alloy picks up from air after a given amount of holding time for a given melting practice. It was shown that small batches of iron melts in an induction furnace can end up with very high concentration of nitrogen (near solubility limit). Surface tension of liquid iron alloys was measured as a function of temperature. Effect of minor additions of S, Ti, and Al on the surface tension of liquid iron alloys was investigated. Up to 18% change in surface tension was detected by minor element additions. This translates to the same amount of change in gas pressure required in a bubble of a given size to keep the bubble stable. A new method was developed to measure the permeability of dendritic structures in situ. The innovative aspect of these experiments, with respect to previous interdendritic permeability measurements, was the fact that the dendritic structure was allowed to form in situ and was not cooled and re-heated for permeability tests. A permeability model was developed and tested using the results of the permeability experiments. The permeability model for flow parallel to the columnar dendrites predicted the experimental permeability results closely when the liquid volume fraction data from equilibrium calculations were used. The permeability gradient model was constructed in order to test the impact of interdendritic channel constriction on the flow of liquid through the mushy zone of a casting. The model examines two different regimes: (i) Dendritic solidification regime where the permeability is dominated by changes in liquid volume fraction and dendrite arm spacing, and (ii) Eutectic solidification regime where the permeability is dominated by changes in viscosity of eutectic mixture. It is assumed that the eutectic mixture behaves like a slurry whose viscosity increases with increasing solid fraction. It is envisioned that this model can be developed into a tool that can be very useful for metal casters.

Albany Research Center

2005-04-01T23:59:59.000Z

331

Growth of silicon sheets for photovoltaic applications  

DOE Green Energy (OSTI)

The status of silicon sheet development for photovoltaic applications is critically reviewed. Silicon sheet growth processes are classified according to their linear growth rates. The fast growth processes, which include edge-defined film-fed growth, silicon on ceramic, dendritic-web growth, and ribbon-to-ribbon growth, are comparatively ranked subject to criteria involving growth stability, sheet productivity, impurity effects, crystallinity, and solar cell results. The status of more rapid silicon ribbon growth techniques, such as horizontal ribbon growth and melt quenching, is also reviewed. The emphasis of the discussions is on examining the viability of these sheet materials as solar cell substrates for low-cost silicon photovoltaic systems.

Surek, T.

1980-12-01T23:59:59.000Z

332

Anti-stratification battery separator  

Science Conference Proceedings (OSTI)

This patent describes a separator for an electric storage battery comprising a thin microporous sheet for suppressing dendrite growth between adjacent plates of the battery. The sheet has top, bottom and lateral edges defining the principal face of the separator and ribs formed on the surface of the face. The improvement described here comprises: the ribs each (1) having a concave shape, (2) being superposed one over another and (3) extending laterally across the face substantially from one the lateral edge to the other the lateral edge for reducing the accumulation of highly concentrated electrolyte at the bottom of the battery during recharge.

Stahura, D.W.; Smith, V.V. Jr.

1986-10-28T23:59:59.000Z

333

PRODUCTION OF URANIUM METAL BY CARBON REDUCTION  

DOE Patents (OSTI)

The preparation of uranium metal by the carbon reduction of an oxide of uranium is described. In a preferred embodiment of the invention a charge composed of carbon and uranium oxide is heated to a solid mass after which it is further heated under vacuum to a temperature of about 2000 deg C to produce a fused uranium metal. Slowly ccoling the fused mass produces a dendritic structure of uranium carbide in uranium metal. Reacting the solidified charge with deionized water hydrolyzes the uranium carbide to finely divide uranium dioxide which can be separated from the coarser uranium metal by ordinary filtration methods.

Holden, R.B.; Powers, R.M.; Blaber, O.J.

1959-09-22T23:59:59.000Z

334

Functionalized Nanoparticles and Surfaces for Controlled Chemical Catalysis and Effective Light Harvesting  

SciTech Connect

We have prepared a range of such arrays as key components for biotechnology and photonic applications. These involve self-assembled arrays of increasing complexity with three-dimensionally disposed multilayer interactions. These arrays also include dendrimers as the distinguishing structural building blocks. These photoactive integrated systems have a regular, highly-branched, three-dimensional architecture. Structural modifications of these units include variation of the core, bridging layers, and terminal groups. These modifications result in a large array of dendritic molecules with potential applications for light harvesting.

Marye Anne Fox, James K. Whitesell

2012-11-02T23:59:59.000Z

335

Dynamics of colloidal particles in ice  

E-Print Network (OSTI)

We use X-ray Photon Correlation Spectroscopy (XPCS) to probe the dynamics of colloidal particles in polycrystalline ice. During freezing, the dendritic ice morphology and rejection of particles from the ice created regions of high-particle-density, where some of the colloids were forced into contact and formed disordered aggregates. We find that the particles in these high density regions underwent ballistic motion coupled with both stretched and compressed exponential decays of the intensity autocorrelation function, and that the particles' characteristic velocity increased with temperature. We explain this behavior in terms of ice grain boundary migration.

Melissa Spannuth; S. G. J. Mochrie; S. S. L. Peppin; J. S. Wettlaufer

2010-12-31T23:59:59.000Z

336

Design of a photovoltaic central power station: flat-plate array  

DOE Green Energy (OSTI)

A design for a photovoltaic central power station using fixed flat-panel arrays has been developed. The 100 MW plant is assumed to be located adjacent to the Saguaro Power Station of Arizona Public Service. The design assumes high-efficiency photovoltaic modules using dendritic web cells. The modules are arranged in 5 MW subfields, each with its own power conditioning unit. The photovoltaic output is connected to the existing 115 kV utility switchyard. The site specific design allows detailed cost estimates for engineering, site preparation, and installation. Collector and power conditioning costs have been treated parametrically.

Not Available

1984-02-01T23:59:59.000Z

337

Silicon materials task of the Low Cost Silicon Solar Array Project (Part 2). Fifth quarterly report and summary, 1 October 1976--31 December 1976. [Definition of purity requirements  

DOE Green Energy (OSTI)

The objective of this program is to develop and define purity requirements for Solar Grade Silicon by exploring the effects of metal impurities on the performance of terrestrial silicon solar cells. The first phase of this effort is now completed. Fifty-two Czochralski ingots and forty-four dendritic web specimens have been grown, chemically analyzed, sampled, and tested for OCD and PCD lifetime and solar cell performance. The results of this study, compiled with much of the experimental data, are intended both as a summary of the work and as a reference for metal impurity effects on silicon solar cells.

Hopkins, R.H.; Davis, J.R.; Rai-Choudhury, P.; Blais, P.D.; McHugh, J.P.; Seidensticker, R.G.; McCormick, J.R.

1977-01-01T23:59:59.000Z

338

Zinc halogen battery electrolyte composition with lead additive  

SciTech Connect

This disclosure relates to a zinc halogen battery electrolyte composition containing an additive providing improved zinc-on-zinc recyclability. The improved electrolyte composition involves the use of a lead additive to inhibit undesirable irregular plating and reduce nodular or dendritic growth on the electrode surface. The lead-containing electrolyte composition of the present invention appears to influence not only the morphology of the base plate zinc, but also the morphology of the zinc-on-zinc replate. In addition, such lead-containing electrolyte compositions appear to reduce hydrogen formation.

Henriksen, Gary L. (Troy, MI)

1981-01-01T23:59:59.000Z

339

Silicon Materials Task of the Low Cost Solar Array Project (part 2). Third quarterly report, 1 April 1976--30 June 1976  

DOE Green Energy (OSTI)

The objective of this program is to develop and define purity requirements for solar grade silicon by exploring the effects of metal impurities on the performance of terrestrial silicon solar cells. During this quarter the growth of all first, second, and nearly all third generation ingots was completed and the growth of fourth generation ingots was initiated. Several boron-doped silicon dendritic web baseline samples were grown as well as one web doped with chromium. Chemical analysis of the ingots is proceeding on schedule, though, as expected, difficulties in assessing the impurity levels of lightly-doped ingots have developed. Lifetime measurements were completed for all 38 ingots grown to date. (WDM)

Hopkins, R.H.; Davis, J.R.; Rai-Choudhury, P.; Blais, P.D.; McHugh, J.P.; McCormick, J.R.

1976-01-01T23:59:59.000Z

340

The mechanical alignment of particles for use in fabricating superconducting and permanent magnetic materials  

DOE Patents (OSTI)

Invention is related to the manufacture of high-quality mechanically aligned superconducting materials using oriented platelet-shaped powder particles, fibers, crystals, and other oriented forms of the recently discovered high-{Tc} class of superconducting ceramics, as well as other superconducting materials. It is also related to the use of these oriented materials in the manufacture of high quality permanent magnetic materials. This pretreatment optimizes the final crystallographic orientation and, thus, properties in these constructs. Such materials as superconducting fibers, needles and platelets are utilized. 11 figs.

Nellis, W.J.; Maple, M.B.

1990-01-24T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Benzylammonium Heptanoate  

E-Print Network (OSTI)

.874, Tmax = 0.999 8415 measured reflections 3253 independent reflections 2308 reflections with I > 2#2;(I) Rint = 0.043 Refinement R[F 2 > 2#2;(F 2)] = 0.054 wR(F 2) = 0.141 S = 1.03 3253 reflections 164 parameters H atoms treated by a mixture of independent... .71073 Ĺ Cell parameters from 9084 reflections ? = 1.0–27.5° µ = 0.07 mm?1 T = 180 K Needle, colourless 0.46 × 0.07 × 0.05 mm Data collection Nonius KappaCCD diffractometer Radiation source: fine-focus sealed tube Graphite monochromator ? and ? scans...

Clarke, Stuart M; Wood, Mary H

2013-05-01T23:59:59.000Z

342

Final report on graphite irradiation test OG-2  

SciTech Connect

Results are presented of dimensional, thermal expansivity, thermal conductivity, Young's modulus, and tensile strength measurements on specimens of nuclear graphites irradiated in capsule OG-2. About half the irradiation space was allocated to H-451 near-isotropic petroleum-coke-based graphite or its subsized prototype grade H-429. Most of these specimens had been previously irradiated. Virgin specimens of another near-isotropic graphite, grade TS-1240, were irradiated. Some previously irradiated specimens of needle-coke-based H-327 graphite and pitch-coke-based P$sub 3$JHAN were also included.

Price, R.J.; Beavan, L.A.

1975-12-15T23:59:59.000Z

343

Decline in urinary retention incidence in 805 patients after prostate brachytherapy: The effect of learning curve?  

SciTech Connect

Purpose: To evaluate the incidence and factors predictive of acute urinary retention (AUR) in 805 consecutive patients treated with prostate brachytherapy monotherapy and to examine the possible effect of a learning curve. Methods and Materials: Between July 1998 and November 2002, 805 patients were treated with prostate brachytherapy. Low-risk patients (Gleason Score (GS) {<=}6; prostate specific antigen (PSA) {<=}10, and {<=} T2b [UICC 1997]) received implant alone. Patients with prostate volume of 50 cc or more, GS = 7, or PSA = 10 to 15 received 6 months of androgen suppression (AS) with brachytherapy. Patient, treatment, and dosimetric factors examined include baseline prostate symptom score (IPSS), diabetes, vascular disease, PSA, Gleason score, clinical stage, AS, ultrasound planning target volume (PUTV), postimplant prostate volume (obtained with 'Day 30' postimplant CT), CT:PUTV ratio (surrogate for postimplant edema), number of seeds, number of needles, number of seeds per needle, dosimetric parameters (V100, V150, and D90), date of implant (learning curve), and implanting oncologists. Univariate and multivariate analyses were carried out. Results: Acute urinary retention in the first 200 patients was 17% vs. 6.3% in the most recently treated 200 patients (p = 0.002). Overall AUR was 12.7%, and prolonged urinary obstruction incidence (>20 days) was 5%. On multivariate analysis, factors predictive of any AUR include baseline IPSS (p = < 0.004), CT:PUTV ratio (p = < 0.001), PUTV (p = < 0.001), and implant order (learning curve) (p = 0.001). Factors predictive for 'prolonged' catheterization (>20 days) on multivariate analysis include IPSS (p < 0.01), number of needles (p < 0.001), diabetes mellitus (p = 0.048), and CT:PUTV ratio (p < 0.001) Conclusion: Over the years, our AUR rate has fallen significantly (from 17% to 6.3%). On multivariate analysis, highly significant factors include IPSS, PUTV, CT:PUTV ratio (i.e., degree of prostate edema), and order of implant (learning curve). Over the course of the program, we have deliberately reduced the number of needles and OR time per patient, which have potentially minimized intraoperative trauma and may have contributed to less toxicity. A learning curve in prostate brachytherapy programs affect not only the outcome but also the toxicity from the treatment.

Keyes, Mira [Department of Radiation Oncology, Vancouver Cancer Centre, Vancouver, BC (Canada)]. E-mail: mkeyes@bccancer.bc.ca; Schellenberg, Devin [Department of Radiation Oncology, Vancouver Cancer Centre, Vancouver, BC (Canada); Moravan, Veronika M.Sc. [Population and Preventive Oncology, British Columbia Cancer Agency, Vancouver, BC (Canada); McKenzie, Michael [Department of Radiation Oncology, Vancouver Cancer Centre, Vancouver, BC (Canada); Agranovich, Alexander [Fraser Valley Cancer Centre, Vancouver, BC (Canada); Pickles, Tom [Department of Radiation Oncology, Vancouver Cancer Centre, Vancouver, BC (Canada); Wu, Jonn [Department of Radiation Oncology, Vancouver Cancer Centre, Vancouver, BC (Canada); Liu, Mitchell [Fraser Valley Cancer Centre, Vancouver, BC (Canada); Bucci, Joseph M.B.B.S. [Department of Radiation Oncology, St. George Hospital, University of New South Wales, Sydney (Australia); Morris, W. James [Department of Radiation Oncology, Vancouver Cancer Centre, Vancouver, BC (Canada)

2006-03-01T23:59:59.000Z

344

Low Temperature, Self-nucleated Growth of Indium Tin Oxide Nanostructures by Pulsed Laser Deposition in Argon  

SciTech Connect

Indium tin oxide (ITO) nanostructures were successfully deposited on glass substrate by pulsed laser ablation in argon gas at 250 deg. C. Microstructural changes were observed in the argon gas pressure between 30 to 50 mTorr. The as-grown, nanostructured ITO exhibit In{sub 2}O{sub 3} bixbyite structure orientated at <111> direction. At the initial stage of growth, there was a large number of nucleation sites detected which eventually evolved into needle-like branches. The presence of spheres at the tip of these branches indicates that these nanostructured ITO were likely governed by vapor-liquid-solid (VLS) growth mechanism.

Tan, S. S.; Lee, W. K.; Kee, Y. Y.; Wong, H. Y.; Tou, T. Y. [Faculty of Engineering, Multimedia University, 63100 Cyberjaya (Malaysia)

2011-03-30T23:59:59.000Z

345

Dielectric barrier discharge plasma in Ar/O{sub 2} promoting apoptosis behavior in A549 cancer cells  

SciTech Connect

The Ar/O{sub 2} plasma needle in the induction of A549 cancer cells apoptosis process is studied by means of real-time observation. The entire process of programmed cell death is observed. The typical morphological changes of A549 apoptosis are detected by 4', 6-diamidino-2-phenylindole staining, for example, chromatin condensation and nuclear fragmentation. Cell viability is determined and quantified by neutral red uptake assay, and the survival rate of A549 from Ar/O{sub 2} plasmas is presented. Further spectral analysis indicates the reactive species, including O and OH play crucial roles in the cell inactivation.

Huang Jun; Li Hui; Chen Wei; Lv Guohua; Wang Xingquan; Zhang Guoping; Wang Pengye [Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China); Ostrikov, Kostya [Plasma Nanoscience Centre Australia (PNCA), CSIRO Materials Science and Engineering, P.O. Box 218, Lindfield, New South Wales 2070 (Australia); School of Physics, The University of Sydney, Sydney, New South Wales 2006 (Australia); Yang Size [Institute of Physics, Chinese Academy of Sciences, Beijing 100190 (China); Department of Aeronautics, Fujian Key Laboratory for Plasma and Magnetic Resonance, School of Physics and Mechanical and Electrical Engineering, Xiamen University, Xiamen 361005 (China)

2011-12-19T23:59:59.000Z

346

A physiological and morphological analysis of the effects of nitrogen supply on the relative growth rates of nine loblolly pine (Pinus taeda L.) clones  

E-Print Network (OSTI)

The influence of nitrogen supply on relationships of relative growth rate (RGR) to leaf physiology, structural and non-structural carbon partitioning, and nitrogen- and water-use efficiencies were examined in loblolly pine (Pinus taeda L.) clonal lines differing in growth potential. Nine 18-month-old loblolly pine clones were grown in a climate-controlled greenhouse for 20 weeks under two contrasting nitrogen (N) regimes (50 and 250 ppm) and a growth analysis was carried out. Higher nitrogen increased plant RGR and largely resulted in proportional shifts in biomass from roots and stems to needles. The RGR of plants receiving higher nitrogen was increased primarily through increased leaf area ratio (LAR), which was increased through higher leaf mass fraction (LMF) and not through changes in needle morphology. Although concentrations of needle glucose in plants receiving 250 ppm N were 22 percent higher than plants receiving lower N, total non-structural carbohydrate concentrations in needles of plants receiving 50 ppm N were nearly double that of clones receiving 250 pm N, primarily due to starch accumulation of the nitrogen-deficient plants. Plants receiving 250 ppm N also had 39 and 18 percent lower starch in the coarse and fine roots, respectively. Plants receiving higher nitrogen were also more water-use efficient, but had lower photosynthetic nitrogen-use efficiency. LAR, net assimilation rate (NAR), specific leaf area (SLA), and LMF were all positively correlated with RGR, but the main influence on RGR differences among clones was LAR. In addition, leaf-level rates of photosynthesis and respiration were positively correlated with RGR; however, faster-growing clones did not exhibit greater carbon economy at the leaf level. Both instantaneous water-use efficiency (A/E) and ?13C were positively correlated with RGR and photosynthetic nitrogen-use efficiency was negatively correlated with RGR. The identification of physiological and morphological traits underpinning differences in RGR among clones and how these traits are affected by nitrogen supply provides new information on trait correlations within species and parallels broader patterns observed among species.

Stover, Corey Michael

2003-05-01T23:59:59.000Z

347

DEVELOPMENT AND FIELD IMPLEMENTATION OF AN IMPROVED METHOD FOR HEADSPACE GAS SAMPLING OF TRANSURANIC WASTE DRUMS  

Science Conference Proceedings (OSTI)

A fast, safe, and cost-effective method for obtaining headspace gas samples has been developed and implemented at Los Alamos National Laboratory (LANL). A sample port is installed directly into a drum lid using a pneumatic driver, allowing sampling with a side-port needle. Testing has shown that the sample port can be installed with no release of radioactive material. Use of this system at LANL has significantly reduced the time required for sampling, and eliminates the need for many safety precautions previously used. The system has significantly improved productivity and lowered radiation exposure and cost.

Polley, M.; Ankrom, J.; Wickland, T.; Warren, J.

2003-02-27T23:59:59.000Z

348

Factors Affecting the Hydrogen Embrittlement Resistance of Ni-Cr-Mn-Nb Welds  

DOE Green Energy (OSTI)

Nickel based alloys are often welded with argon/hydrogen shielding gas mixtures to minimize oxidation and improve weld quality. However, shielding gas mixtures with {ge} 1% hydrogen additions can result in hydrogen concentrations greater than 5 wt. ppm in the weld metal and reduce ductility via hydrogen embrittlement. For the conditions investigated, the degree of hydrogen embrittlement is highly variable between 5 and 14 wt. ppm. investigation of hydrogen embrittlement of EN82H GTAW welds via tensile testing, light microscopy, transmission electron microscopy, orientation imaging microscopy, and thermal desorption spectroscopy shows that this variability is due to the inhomogeneous microstructure of the welds, the presence of recrystallized grains, and complex residual plastic strains. Specifically, research indicates that high residual strains and hydrogen trapping lower the ductility of Ni-Cr-Mn-Nb weld metal when dissolved hydrogen concentrations are greater than 5 wt. ppm. The inhomogeneous microstructure contains columnar dendritic, cellular dendritic, and recrystallized grains. The decreased tensile ductility observed in embrittled samples is recovered by post weld heat treatments that decrease the bulk hydrogen concentration below 5 wt. ppm.

G.A. Young; C.K. Battige; N. Liwis; M.A. Penik; J. Kikel; A.J. Silvia; C.K. McDonald

2001-03-18T23:59:59.000Z

349

 

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

Snow Clump Formation Snow Clump Formation Name: Nate Status: student Grade: 9-12 Location: IL Country: USA Date: Spring 2012 Question: We are having some very unusual snowfall. It is not flakes, but clumps of 100-700 flakes. Most of the individual flakes making up the clumps are fern dendrites, with a few stellar dendrites. How do these clumps form? They range 1.0 to 5.2 cm across. Replies: What you are observing is not too unusual. Snowflakes can agglomerate to form large clumps if the conditions are correct. The "correct conditions" are temperatures not too far below 0 C., and not a lot of wind to break the clumps apart. Under these conditions, the individual flakes tend to form these "super flakes". They are not very stable and tend to settle onto the ground or other substrates. The conditions are sufficiently rigid that this type of snow fall does not usually last very long. The clumps form when the flakes make contact under quiet conditions.

350

Microstructural response to heat affected zone cracking of prewelding heat-treated Inconel 939 superalloy  

Science Conference Proceedings (OSTI)

The microstructural response to cracking in the heat-affected zone (HAZ) of a nickel-based IN 939 superalloy after prewelding heat treatments (PWHT) was investigated. The PWHT specimens showed two different microstructures: 1) spherical ordered {gamma} Prime precipitates (357-442 nm), with blocky MC and discreet M{sub 23}C{sub 6} carbides dispersed within the coarse dendrites and in the interdendritic regions; and 2) ordered {gamma} Prime precipitates in 'ogdoadically' diced cube shapes and coarse MC carbides within the dendrites and in the interdendritic regions. After being tungsten inert gas welded (TIG) applying low heat input, welding speed and using a more ductile filler alloy, specimens with microstructures consisting of spherical {gamma} Prime precipitate particles and dispersed discreet MC carbides along the grain boundaries, displayed a considerably improved weldability due to a strong reduction of the intergranular HAZ cracking associated with the liquation microfissuring phenomena. - Highlights: Black-Right-Pointing-Pointer Homogeneous microstructures of {gamma} Prime spheroids and discreet MC carbides of Ni base superalloys through preweld heat treatments. Black-Right-Pointing-Pointer {gamma} Prime spheroids and discreet MC carbides reduce the intergranular HAZ liquation and microfissuring of Nickel base superalloys. Black-Right-Pointing-Pointer Microstructure {gamma} Prime spheroids and discreet blocky type MC carbides, capable to relax the stress generated during weld cooling. Black-Right-Pointing-Pointer Low welding heat input welding speeds and ductile filler alloys reduce the HAZ cracking susceptibility.

Gonzalez, M.A., E-mail: mgonzalez@comimsa.com.mx [Facultad de Ingenieria Mecanica y Electrica (FIME-UANL), Av. Universidad s/n. Ciudad Universitaria, C.P.66451 San Nicolas de los Garza, N.L. (Mexico); Martinez, D.I., E-mail: dorairma@yahoo.com [Facultad de Ingenieria Mecanica y Electrica (FIME-UANL), Av. Universidad s/n. Ciudad Universitaria, C.P.66451 San Nicolas de los Garza, N.L. (Mexico); Perez, A., E-mail: betinperez@hotmail.com [Facultad de Ingenieria Mecanica y Electrica (FIME-UANL), Av. Universidad s/n. Ciudad Universitaria, C.P.66451 San Nicolas de los Garza, N.L. (Mexico); Guajardo, H., E-mail: hguajardo@frisa.com [FRISA Aerospace, S.A. de C.V., Valentin G. Rivero No. 200, Col. Los Trevino, C.P. 66150, Santa Caterina N.L. (Mexico); Garza, A., E-mail: agarza@comimsa.com [Corporacion Mexicana de Investigacion en Materiales S.A. de C.V. (COMIMSA), Ciencia y Tecnologia No.790, Saltillo 400, C.P. 25295 Saltillo Coah. (Mexico)

2011-12-15T23:59:59.000Z

351

Defect structure of web silicon ribbon  

DOE Green Energy (OSTI)

Web silicon ribbon has recently emerged as a material for the production of high efficiency solar cells. Since defects introduced during growth may influence locally minority carrier recombination rates, there is now a need to examine the defect structure in detail and to correlate it with electrical activity. This work describes initial observations made on web material by EBIC and HVEM. Although EBIC investigations have shown that dislocations emerging at the web surface enhance minority carrier recombination rates, their density is low enough (typically 10/sup 5/cm/sup -2/) to have only a small effect on the efficiency of the material as a solar cell. Since a condition for dendritic web growth is that the dendrites contain at least two twin boundaries it is usual to find that some of these boundaries extend into the web. These boundaries are formed parallel to the (111) growth surface and are found to be sites of strong electrical activity. HVEM has been used to study the defect structure at the twin boundary. Two types of dislocation networks lying on different (111) planes have been observed, presumably corresponding to two adjacent twin boundaries.

Cunningham, B.; Strunk, H.; Ast, D.

1980-10-01T23:59:59.000Z

352

Permanent Mold Casting of JIS-AC4C Aluminum Alloy Using a Low-Temperature Mold  

Science Conference Proceedings (OSTI)

Permanent mold casting using mold temperatures below 200 deg. C was conducted to obtain a high-strength, thin-walled casting. Al-7.36 mass% Si -0.18 Cu- 0.27Mg-0.34Fe alloy JIS-AC4C was cast using a bottom pouring cast plan. The product had a rectangular tube shape (70 mm W x 68 mm D x 180 mm H) with wall thicknesses of 1, 3 and 5 mm. The effect of heat insulation at the melt path was compared when using a sand runner insert and when using a steel runner insert as well as a powder mold release agent. Fine microstructures were observed in the casting. The smaller the thickness, the higher the hardness with smaller secondary dendrite arm spacing (SDAS). However, the hardness and the SDAS were unaffected by the mold temperature. It was proposed that the avoidance of the formation of primary {alpha} dendrite at the melt path generates a higher strength casting with adequate mold filling.

Yamagata, Hiroshi; Nikawa, Makoto

2011-01-17T23:59:59.000Z

353

The investigation of die-pressing and sintering behavior of ITP CP-Ti and Ti-6Al-4V powders  

SciTech Connect

This paper investigated the die-pressing and sintering behavior of the low-cost CP-Ti and Ti-6Al- 4V powders made by the Armstrong Process . The Armstrong powders have an irregular coral like, dendritic morphology, with a dendrite size of approximately 2-5 m. As-received as well as milled powders were uniaxially pressed at designated pressures up to 690 MPa to form disk samples with different aspect ratios. In the studied pressure range, an empirical powder compaction equation was applied to linearize the green density pressure relationship, and powder compaction parameters were obtained. The Armstrong Ti-64 powder exhibited a significantly higher sinterability than the CP-Ti powder. This was explained to be due to the higher diffusivity of V at the sintering temperature. The Ti-64 samples with a green density of 71.0% increased to 99.6% after sintering at 1300oC for 1 hour. An ex-situ technique was used to track the powder morphology change before and after sintering.

Chen, Wei [ORNL; Yamamoto, Yukinori [ORNL; Peter, William H [ORNL; Clark, Michael B [ORNL; Nunn, Stephen D [ORNL; Kiggans, Jim [ORNL; Muth, Thomas R [ORNL; Blue, Craig A [ORNL; Williams, James C [Ohio State University; Fuller, Brian [International Titanium Powder; Akhtar, Kamal [International Titanium Powder

2012-01-01T23:59:59.000Z

354

NEWTON, Ask a Scientist at Argonne National Labs  

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

Magnetic Reversal and Magnetic Strips Magnetic Reversal and Magnetic Strips Name: Mary Ellen Status: student Grade: 6-8 Location: NE Country: USA Date: N/A Question: My earth science teacher has been telling us about continental drift and magnetic striping in ocean rocks due to magnetic reversals. She said that by the pattern, this is due to happen again, soon. Will the strip on my bus card still work? Will magnets that now attract, repel (and the other way around? Replies: Mary Ellen, Magnetic reversals are not predictable. There is no pattern to the reversals. There is no evidence that this will occur any time soon. The last magnetic reversal occurred 730,000 years ago, so for the last 730,000 years the north end of the magnetic needle on your compass always pointed north. It takes about 1000 years for a reversal to occur, so, if you took a Rumpelstiltskin sleep, when you woke up, the north end of your compass needle would point south.

355

Advanced Electrical, Optical and Data Communication Infrastructure Development  

SciTech Connect

The implementation of electrical and IT infrastructure systems at the North Carolina Center for Automotive Research , Inc. (NCCAR) has achieved several key objectives in terms of system functionality, operational safety and potential for ongoing research and development. Key conclusions include: (1) The proven ability to operate a high speed wireless data network over a large 155 acre area; (2) Node to node wireless transfers from access points are possible at speeds of more than 50 mph while maintaining high volume bandwidth; (3) Triangulation of electronic devices/users is possible in areas with overlapping multiple access points, outdoor areas with reduced overlap of access point coverage considerably reduces triangulation accuracy; (4) Wireless networks can be adversely affected by tree foliage, pine needles are a particular challenge due to the needle length relative to the transmission frequency/wavelength; and (5) Future research will use the project video surveillance and wireless systems to further develop automated image tracking functionality for the benefit of advanced vehicle safety monitoring and autonomous vehicle control through 'vehicle-to-vehicle' and 'vehicle-to-infrastructure' communications. A specific advantage realized from this IT implementation at NCCAR is that NC State University is implementing a similar wireless network across Centennial Campus, Raleigh, NC in 2011 and has benefited from lessons learned during this project. Consequently, students, researchers and members of the public will be able to benefit from a large scale IT implementation with features and improvements derived from this NCCAR project.

Simon Cobb

2011-04-30T23:59:59.000Z

356

Hydrogeologic and hydrogeochemical assessment of geothermal fluids in the Pyramid Lake area, Washoe country, Nevada  

DOE Green Energy (OSTI)

This paper evaluates the hydrogeological and hydrogeochemical characteristics of the geothermal fluids in the Pyramid Lake area using data from existing published and unpublished reports on springs, challow and deep wells in the area. Four geochemical provinces, namely, chloride, bicarbonate, suphate and nixed chloride-bicarbonate have been identified. Chloride waters are found in known geothermal areas. Two subsurface water recharge zones which reed the shallow and deep geothermal systems are proposed. These are the Virginia Mountains and their Northern extension and the Fox and Lake Ranges. Tertiary and Quaternary faulting systems in these mountains and Ranges act as heat conduits for geothermal fluids. The Needle Rocks geothermal system is postulated to be deeper than the San Emidio system. A connection between the Needle Rocks system and the Pyramid and Anaho islands warm springs is not clear from this study because of lack of chemical data from these islands. More systematic measurements of static water levels, temperatures, well lithology, water chemistry and isotopes data are recommended to enable better understanding of the geothermal systems in the area.

Ojiambo, S. Bwire

1992-01-01T23:59:59.000Z

357

Foliar leaching, translocation, and biogenic emission of 35S in radiolabeled loblolly pines  

SciTech Connect

Foliar leaching, basipetal (downard) translocation, and biogenic emission of sulfur (S), as traced by {sup 35}S, were examined in a field study of loblolly pines. Four trees were radiolabeled by injection with amounts of {sup 35}S in the MBq range, and concentrations in needle fall, stemflow, throughfall, and aboveground biomass were measured over a period of 15-20 wk after injection. The contribution of dry deposition to sulfate-sulfur (SO{sub 4}{sup 2-}-S) concentrations in net throughfall (throughfall SO{sub 4}{sup 2-}-S concentration minus that in incident precipitation) beneath all four trees was >90%. Calculations indicated that about half of the summertime SO{sub 2}2 dry deposition flux to the loblolly pines was fixes in the canopy and not subsequently leached by rainfall. Based on mass balance calculations, {sup 35}S losses through biogenic emissions from girdled trees were inferred to be 25-28% of the amount injected. Estimates based on chamber methods and mass balance calculations indicated a range in daily biogenic S emission of 0.1-10 {micro}g/g dry needles. Translocation of {sup 35}S to roots in nongirdled trees was estimated to be between 14 and 25% of the injection. It is hypothesized that biogenic emission and basipetal translocation of S (and not foliar leaching) are important mechanisms by which forest trees physiologically adapt to excess S in the environment.

Garten Jr, Charles T [ORNL

1990-02-01T23:59:59.000Z

358

Emission properties of explosive field emission cathodes  

Science Conference Proceedings (OSTI)

The research results of the explosive field emission cathode plasma expansion velocity and the initial emission area in the planar diode configuration with cathodes made of graphite, stainless steel, polymer velvet, carbon coated, and carbon fiber (needle type) cathodes are presented. The experiments have been performed at the electron accelerator LIA-200 (200 kV, 100 ns, and 4 kA). The diode voltage has been varied from 28-225 kV, whereas the current density has been varied from 86-928 A/cm{sup 2} with 100 ns pulse duration. The experimentally obtained electron beam diode perveance has been compared with the 1 dimensional Child-Langmuir- law. It was found that initially only a part of the cathode take part in the emission process. The plasma expands at 1.7-5.2 cm/{mu}s for 4 mm anode-cathode gap for various cathode materials. It was found that the plasma expansion velocity increases with the decrease in the cathode diameter. At the beginning of the accelerating pulse, the entire cathode area participates in the electron emission process only for the multiple needle type carbon fiber cathode.

Roy, Amitava; Patel, Ankur; Menon, Rakhee; Sharma, Archana; Chakravarthy, D. P. [Accelerator and Pulse Power Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085 (India); Patil, D. S. [Laser and Plasma Technology Division, Bhabha Atomic Research Centre, Trombay, Mumbai 400085 (India)

2011-10-15T23:59:59.000Z

359

Ion-induced nuclear radiotherapy  

DOE Patents (OSTI)

Ion-induced Nuclear Radiotherapy (INRT) is a technique for conducting radiosurgery and radiotherapy with a very high degree of control over the spatial extent of the irradiated volume and the delivered dose. Based upon the concept that low energy, ion induced atomic and nuclear reactions can be used to produce highly energetic reaction products at the site of a tumor, the INRT technique is implemented through the use of a conduit-needle or tube which conducts a low energy ion beam to a position above or within the intended treatment area. At the end of the conduit-needle or tube is a specially fabricated target which, only when struck by the ion beam, acts as a source of energetic radiation products. The inherent limitations in the energy, and therefore range, of the resulting reaction products limits the spatial extent of irradiation to a pre-defined volume about the point of reaction. Furthermore, since no damage is done to tissue outside this irradiated volume, the delivered dose may be made arbitrarily large. INRT may be used both as a point-source of radiation at the site of a small tumor, or as a topical bath of radiation to broad areas of diseased tissue.

Horn, Kevin M. (Albuquerque, NM); Doyle, Barney L. (Albuquerque, NM)

1996-01-01T23:59:59.000Z

360

Ion-induced nuclear radiotherapy  

DOE Patents (OSTI)

Ion-induced Nuclear Radiotherapy (INRT) is a technique for conducting radiosurgery and radiotherapy with a very high degree of control over the spatial extent of the irradiated volume and the delivered dose. Based upon the concept that low energy, ion induced atomic and nuclear reactions can be used to produce highly energetic reaction products at the site of a tumor, the INRT technique is implemented through the use of a conduit-needle or tube which conducts a low energy ion beam to a position above or within the intended treatment area. At the end of the conduit-needle or tube is a specially fabricated target which, only when struck by the ion beam, acts as a source of energetic radiation products. The inherent limitations in the energy, and therefore range, of the resulting reaction products limits the spatial extent of irradiation to a pre-defined volume about the point of reaction. Furthermore, since no damage is done to tissue outside this irradiated volume, the delivered dose may be made arbitrarily large. INRT may be used both as a point-source of radiation at the site of a small tumor, or as a topical bath of radiation to broad areas of diseased tissue. 25 figs.

Horn, K.M.; Doyle, B.L.

1996-08-20T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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.


361

The CUNY Energy Institute Electrical Energy Storage Development for Grid Applications  

Science Conference Proceedings (OSTI)

1. Project Objectives The objectives of the project are to elucidate science issues intrinsic to high energy density electricity storage (battery) systems for smart-grid applications, research improvements in such systems to enable scale-up to grid-scale and demonstrate a large 200 kWh battery to facilitate transfer of the technology to industry. 2. Background Complex and difficult to control interfacial phenomena are intrinsic to high energy density electrical energy storage systems, since they are typically operated far from equilibrium. One example of such phenomena is the formation of dendrites. Such dendrites occur on battery electrodes as they cycle, and can lead to internal short circuits, reducing cycle life. An improved understanding of the formation of dendrites and their control can improve the cycle life and safety of many energy storage systems, including rechargeable lithium and zinc batteries. Another area where improved understanding is desirable is the application of ionic liquids as electrolytes in energy storage systems. An ionic liquid is typically thought of as a material that is fully ionized (consisting only of anions and cations) and is fluid at or near room temperature. Some features of ionic liquids include a generally high thermal stability (up to 450 °C), a high electrochemical window (up to 6 V) and relatively high intrinsic conductivities. Such features make them attractive as battery or capacitor electrolytes, and may enable batteries which are safer (due to the good thermal stability) and of much higher energy density (due to the higher voltage electrode materials which may be employed) than state of the art secondary (rechargeable) batteries. Of particular interest is the use of such liquids as electrolytes in metal air batteries, where energy densities on the order of 1-2,000 Wh / kg are possible; this is 5-10 times that of existing state of the art lithium battery technology. The Energy Institute has been engaged in the development of flow-assisted nickel zinc battery technology. This technology has the promise of enabling low-cost (batteries have only demonstrated about 400 cycles to failure.

Banerjee, Sanjoy

2013-03-31T23:59:59.000Z

362

The CUNY Energy Institute Electrical Energy Storage Development for Grid Applications  

SciTech Connect

1. Project Objectives The objectives of the project are to elucidate science issues intrinsic to high energy density electricity storage (battery) systems for smart-grid applications, research improvements in such systems to enable scale-up to grid-scale and demonstrate a large 200 kWh battery to facilitate transfer of the technology to industry. 2. Background Complex and difficult to control interfacial phenomena are intrinsic to high energy density electrical energy storage systems, since they are typically operated far from equilibrium. One example of such phenomena is the formation of dendrites. Such dendrites occur on battery electrodes as they cycle, and can lead to internal short circuits, reducing cycle life. An improved understanding of the formation of dendrites and their control can improve the cycle life and safety of many energy storage systems, including rechargeable lithium and zinc batteries. Another area where improved understanding is desirable is the application of ionic liquids as electrolytes in energy storage systems. An ionic liquid is typically thought of as a material that is fully ionized (consisting only of anions and cations) and is fluid at or near room temperature. Some features of ionic liquids include a generally high thermal stability (up to 450 °C), a high electrochemical window (up to 6 V) and relatively high intrinsic conductivities. Such features make them attractive as battery or capacitor electrolytes, and may enable batteries which are safer (due to the good thermal stability) and of much higher energy density (due to the higher voltage electrode materials which may be employed) than state of the art secondary (rechargeable) batteries. Of particular interest is the use of such liquids as electrolytes in metal air batteries, where energy densities on the order of 1-2,000 Wh / kg are possible; this is 5-10 times that of existing state of the art lithium battery technology. The Energy Institute has been engaged in the development of flow-assisted nickel zinc battery technology. This technology has the promise of enabling low-cost (<$250 / kWh) energy storage, while overcoming the historical poor cycle-life drawback. To date, the results have been promising, with a cycle life of 1,500 cycles demonstrated in small laboratory cells – an improvement of approximately 400%. Prior state of the art nickel zinc batteries have only demonstrated about 400 cycles to failure.

Banerjee, Sanjoy

2013-03-31T23:59:59.000Z

363

The Efficacy of Ultraviolet Radiation for Sterilizing Tools Used for Surgically Implanting Transmitters into Fish  

SciTech Connect

Telemetry is frequently used to examine the behavior of fish, and the transmitters used are normally surgically implanted into the coelom of fish. Implantation requires the use of surgical tools such as scalpels, forceps, needle holders, and sutures. When several fish are implanted consecutively for large telemetry studies, it is common for surgical tools to be sterilized or, at minimum, disinfected between each use so that pathogens that may be present are not spread among fish. However, autoclaving tools can take a long period of time, and chemical sterilants or disinfectants can be harmful to both humans and fish and have varied effectiveness. Ultraviolet (UV) radiation is commonly used to disinfect water in aquaculture facilities. However, this technology has not been widely used to sterilize tools for surgical implantation of transmitters in fish. To determine its efficacy for this application, Pacific Northwest National Laboratory researchers used UV radiation to disinfect surgical tools (i.e., forceps, needle holder, stab scalpel, and suture) that were exposed to one of four aquatic organisms that typically lead to negative health issues for salmonids. These organisms included Aeromonas salmonicida, Flavobacterium psychrophilum, Renibacterium salmoninarum, and Saprolegnia parasitica. Surgical tools were exposed to the bacteria by dipping them into a confluent suspension of three varying concentrations (i.e., low, medium, high). After exposure to the bacterial culture, tools were placed into a mobile Millipore UV sterilization apparatus. The tools were then exposed for three different time periods—2, 5, or 15 min. S. parasitica, a water mold, was tested using an agar plate method and forceps-pinch method. UV light exposures of 5 and 15 min were effective at killing all four organisms. UV light was also effective at killing Geobacillus stearothermophilus, the organism used as a biological indicator to verify effectiveness of steam sterilizers. These techniques appear to provide a quick alternative disinfection technique for some surgical tools that is less harmful to both humans and fish while not producing chemical waste. However, we do not recommend using these methods with tools that have overlapping parts or other structures that cannot be directly exposed to UV light such as needle holders.

Walker, Ricardo W.; Markillie, Lye Meng; Colotelo, Alison HA; Gay, Marybeth E.; Woodley, Christa M.; Brown, Richard S.

2013-02-28T23:59:59.000Z

364

Sandia National Labs: Materials Science and Engineering Center: Research &  

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

Accomplishments Accomplishments Patents PATENTS Method for Making Surfactant-Templated Thin Films, Jeff Brinker, Hongyou Fan, Patent #RE41612, issued 8/13/10 Dendritic Metal Nanostructures, John Shelnutt, Yujiang Song, Patent #7,785,391, issued 8/13/10 Metal Nanoparticles as a Conductive Catalyst, Eric Coker, Patent #7,767,610, issued 8/13/10 Water-Soluable Titanium Alkoxide Material, Timothy Boyle, Patent # 7,741,486 B1, issued 6/22/10 Microfabricated Triggered Vacuum Switch, Alex W. Roesler, Joshua M. Schare,Kyle Bunch, Patent #7,714,240, issued 5/11/10 Method of Photocatalytic Nanotagging, John Shelnutt, Craig Medforth, Yujiang Song, Patent #7,704,489, issued 4/27/10 Correlation Spectrometer, Michael Sinclair, Kent Pfeifer, Jeb Flemming, Gary D Jones, Chris Tigges, Patent #7,697,134, issued 4/13/10

365

Enabling Thin Silicon Solar Cell Technology  

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

Enabling Thin Silicon Solar Cell Enabling Thin Silicon Solar Cell Technology Enabling Thin Silicon Solar Cell Technology Print Friday, 21 June 2013 10:49 Generic silicon solar cells showing +45°, -45°, and dendritic crack patterns. The effort to shift U.S. energy reliance from fossil fuels to renewable sources has spurred companies to reduce the cost and increase the reliability of their solar photovoltaics (SPVs). The use of thinner silicon in SPV technologies is being widely adopted because it significantly reduces costs; however, silicon is brittle, and thinner silicon, coupled with other recent trends in SPV technologies (thinner glass, lighter or no metal frames, increased use of certain polymers for encapsulation of the silicon cells), is more susceptible to stress and cracking. When the thin

366

Research Highlight  

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

Understanding Ice Formation in Arctic Mixed-Phase Boundary-Layer Clouds Understanding Ice Formation in Arctic Mixed-Phase Boundary-Layer Clouds During ISDAC Download a printable PDF Submitter: Ackerman, A., NASA - Goddard Institute for Space Studies Fridlind, A. M., NASA - Goddard Institute for Space Studies Area of Research: Cloud Distributions/Characterizations Working Group(s): Cloud-Aerosol-Precipitation Interactions Journal Reference: Avramov A, AS Ackerman, AM Fridlind, B van Diedenhoven, G Botta, K Aydin, J Verlinde, KV Alexei, W Strapp, GM McFarquhar, R Jackson, SD Brooks, A Glen, and M Wolde. 2011. "Towards ice formation closure in Arctic mixed-phase boundary layer clouds during ISDAC." Journal of Geophysical Research - Atmospheres, 116, D00T08, doi:10.1029/2011JD015910. Ice number size distributions as simulated (dendrites in red, aggregates in

367

Progress in passive solar energy systems. Volume 8. Part 1  

DOE Green Energy (OSTI)

This book presents the papers given at a conference sponsored by the US DOE, the Solar Energy Research Institute, SolarVision, Inc., and the Southern California Solar Energy Society. The topics considered at the conference included sizing solar energy systems for agricultural applications, a farm scale ethanol production plant, the EEC wind energy RandD program, the passive solar performance assessment of an earth-sheltered house, the ARCO 1 MW photovoltaic power plant, the performance of a dendritic web photovoltaic module, second generation point focused concentrators, linear fresnel lens concentrating photovoltaic collectors, photovoltaic conversion efficiency, amorphous silicon thin film solar cells, a photovoltaic system for a shopping center, photovoltaic power generation for the utility industry, spectral solar radiation, and the analysis of insolation data.

Hayes, J.; Andrejko, D.A.

1983-01-01T23:59:59.000Z

368

Silicon-on ceramic process. Silicon sheet growth and device development for the large-area silicon sheet and cell development tasks of the low-cost solar array project. Quarterly report No. 12, April 2, 1979-June 29, 1979  

DOE Green Energy (OSTI)

The objective of this research program is to investigate the technical and economic feasibility of producing solar-cell-quality sheet silicon. We plan to do this by coating one surface of carbonized ceramic substrates with a thin layer of large-grain polycrystalline silicon from the melt. During the quarter, significant progress was demonstrated in several areas: (1) a 10-cm/sup 2/ cell having 9.9 percent conversion efficiency (AM1, AR) was fabricated; (2) the Honeywall-sponsored SCIM coating development succeeded in producing a 225-cm/sup 2/ layer of sheet silicon (18 inches x 2 inches); and (3) 100 ..mu..m-thick coatings at pull speed of 0.15 cm/sec wer$obta9ned, although apoproximately 50 percent of the layer exhibited dendritic growth. Other results and accomplishments during the quarter are reported in detail. (WHK)

Chapman, P.W.; Zook, J.D.; Heaps, J.D.; Grung, B.L.; Koepke, B.; Schuldt, S.B.

1979-07-31T23:59:59.000Z

369

Slide 1  

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

R R IDS F low-A s s is ted R ec hargeable Zn-MnO 2 B attery / C UNY E nergy Ins titute Grid-scale battery from extremely low cost materials The CUNY Energy Institute proposes to develop a novel flow- assisted rechargeable zinc-manganese dioxide (Zn-MnO 2 ) battery. Due to low cost basis materials, this battery has the potential to revolutionize the renewable energy industry, offering grid-scale energy storage for < $100 / kWh. * CUNY's innovation of flow-assist Zn electrodes * RBC's innovation of Bi-doped MnO 2 materials These overcome long-standing cycleability challenges: Zn dendrite formation and MnO 2 irreversibility. Cost targets, cycle life, and power needs are met with these materials when operating at low depth of discharge (DOD), appropriate for stationary grid-scale applications.

370

Microsoft PowerPoint - Marsden - IPRC 2012- Uranium Product Purity.29 Aug 2012  

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

Purity Purity of Uranium Product from Electrochemical Recycling of Used Metallic Fuel K.C. Marsden B.R. Westphal M.N. Patterson B. Pesic 2012 IPRC August 26-29, 2012 Contents  Materials and Fuels Complex (MFC) of the INL  Fuel Conditioning Facility  Processing at the Fuel Conditioning Facility  Value of Uranium Product Purity  Inputs - FFTF Fuel and ER Salt  Dendrite Samples  Final Product Samples  Future Studies 2 Materials and Fuels Complex (MFC) of the INL  ~ 45 km west of Idaho Falls, ~800 employees  Location of former EBR-II reactor  Two hot cell facilities and multiple laboratories for research with irradiated materials - Irradiated Material Characterization Laboratory (IMCL) - Electron Microscopy Laboratory (EML) - Hot Fuel Examination Facility (HFEF) - Fuel Conditioning Facility (FCF) 3 Fuel Conditioning Facility (FCF)  Rectangular

371

Coordination Chemistry in magnesium battery electrolytes: how ligands affect their performance  

Science Conference Proceedings (OSTI)

Magnesium battery is potentially a safe, cost-effective, and high energy density technology for large scale energy storage. However, the development of magnesium battery has been hindered by the limited performance and the lack of fundamental understandings of electrolytes. Here, we present a coordination chemistry study of Mg(BH4)2 in ethereal solvents. The O donor denticity, i.e. ligand strength of the ethereal solvents which act as ligands to form solvated Mg complexes, plays a significant role in enhancing coulombic efficiency of the corresponding solvated Mg complex electrolytes. A new and safer electrolyte is developed based on Mg(BH4)2, diglyme and optimized LiBH4 additive. The new electrolyte demonstrates 100% coulombic efficiency, no dendrite formation, and stable cycling performance with the cathode capacity retention of ~90% for 300 cycles in a prototype magnesium battery.

Shao, Yuyan; Liu, Tianbiao L.; Li, Guosheng; Gu, Meng; Nie, Zimin; Engelhard, Mark H.; Xiao, Jie; Lu, Dongping; Wang, Chong M.; Zhang, Jiguang; Liu, Jun

2013-11-04T23:59:59.000Z

372

Direct Numerical Simulation Of Solidification Microstructures Affected By Fluid Flow  

E-Print Network (OSTI)

The effects of fluid flow on the solidification morphology of pure materials and solute microsegregation patterns of binary alloys are studied using a computational methodology based on a front tracking/finite difference method. A general single-field formulation is presented for the full coupling of phase change, fluid flow, heat and solute transport. This formulation accounts for interfacial rejection/absorption of latent heat and solute, interfacial anisotropies, discontinuities in material properties between the liquid and solid phases, shrinkage/expansion upon solidification and motion and deformation of the solid. Numerical results are presented for the two-dimensional dendritic solidification of pure succinonitrile and the solidification of globulitic grains of a Plutonium-Gallium alloy. For both problems, comparisons are made between solidification without fluid flow and solidification within a shear flow. Introduction Nearly all materials of engineering interest have, at som...

Damir Juric

1998-01-01T23:59:59.000Z

373

Ductile alloy and process for preparing composite superconducting wire  

DOE Patents (OSTI)

An alloy for the commercial production of ductile superconducting wire is prepared by melting together copper and at least 15 weight percent niobium under non-oxygen-contaminating conditions, and rapidly cooling the melt to form a ductile composite consisting of discrete, randomly distributed and orientated dendritic-shaped particles of niobium in a copper matrix. As the wire is worked, the dendritric particles are realigned parallel to the longitudinal axis and when drawn form a plurality of very fine ductile superconductors in a ductile copper matrix. The drawn wire may be tin coated and wound into magnets or the like before diffusing the tin into the wire to react with the niobium. Impurities such as aluminum or gallium may be added to improve upper critical field characteristics.

Verhoeven, John D. (Ames, IA); Finnemore, Douglas K. (Ames, IA); Gibson, Edwin D. (Ames, IA); Ostenson, Jerome E. (Ames, IA)

1983-03-29T23:59:59.000Z

374

Method of preparing composite superconducting wire  

DOE Patents (OSTI)

An improved method of preparing composite multifilament superconducting wire of Nb.sub.3 Sn in a copper matrix which eliminates the necessity of coating the drawn wire with tin. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb.sub.3 Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.

Verhoeven, John D. (Ames, IA); Gibson, Edwin D. (Ames, IA); Finnemore, Douglas K. (Ames, IA); Ostenson, Jerome E. (Ames, IA); Schmidt, Frederick A. (Ames, IA); Owen, Charles V. (Ames, IA)

1985-08-06T23:59:59.000Z

375

Improved method of preparing composite superconducting wire  

DOE Patents (OSTI)

An improved method of preparing composite multifilament superconducting wire of Nb/sub 3/Sn in a copper matrix eliminates the necessity of coating the drawn wire with tin. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb/sub 3/Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.

Verhoeven, J.D.; Gibson, E.D.; Finnemore, D.K.; Ostenson, J.E.; Schmidt, F.A.; Owen, C.V.

1979-10-17T23:59:59.000Z

376

Improved method of preparing composite superconducting wire  

DOE Patents (OSTI)

An improved method of preparing composite multifilament superconducting wire of Nb/sub 3/Sn in a copper matrix which eliminates the necessity of coating the drawn wire with tin is described. A generalized cylindrical billet of an alloy of copper containing at least 15 weight percent niobium, present in the copper as discrete, randomly distributed and oriented dendritic-shaped particles, is provided with at least one longitudinal opening which is filled with tin to form a composite drawing rod. The drawing rod is then drawn to form a ductile composite multifilament wire containing a filament of tin. The ductile wire containing the tin can then be wound into magnet coils or other devices before heating to diffuse the tin through the wire to react with the niobium forming Nb/sub 3/Sn. Also described is an improved method for making large billets of the copper-niobium alloy by consumable-arc casting.

Verhoeven, J.D.; Gibson, E.D.; Finnemore, D.K.; Ostenson, J.E.; Schmidt, F.A.; Owen, C.V.

1981-04-24T23:59:59.000Z

377

DOE Geothermal well stimulation program  

DOE Green Energy (OSTI)

An effective stimulation treatment requires the interaction of four separate items: frac fluids, proppants, equipment, and planned and properly engineered schedules. While there are good fluid systems and proppants, only judicious combinations and a well thought out schedule which uses all of these materials and available equipment to best advantage is an optimum stimulation treatment. Generally, high flow rates and convective cooling can be used either with conventional (planar) fracturing or with a dendritic fracturing technique. Many of todays fluid systems have been tested to above 400/sup 0/F. Some fluids have survived quite well. Current tests on proppants have shown temperature sensitivities in sand; however, there are resin coated materials and sintered bauxite which are not temperature sensitive. (MHR)

Hanold, R.J.; Campbell, D.A.; Sinclair, A.R.

1980-10-20T23:59:59.000Z

378

Analysis of composite electrolytes with sintered reinforcement structure for energy storage applications  

Science Conference Proceedings (OSTI)

Effective conductivity and mechanical properties of composite polymer electrolytes, in which the reinforcement phase is a sintered packed bed of Li-ion conductive ceramics particles, were estimated using Finite Element Analyses. The computations targeted estimation of the effect of sintering degree, i.e. size of the inter-particle connective necks, on the overall properties of the composite. Methods for microstructure generation and computational procedures were presented. The mechanical ability of the membrane to block lithium dendrites was assessed based on a stability criterion, which depends on the computed effective stiffness. It was found that the minimum size of the inter-particle connections necessary to provide mechanical stability without losing the enhancement in conductivity was 0.05 times the mean particle radius.

Kalnaus, Sergiy [ORNL; Tenhaeff, Wyatt E [ORNL; Sakamoto, Jeff [Michigan State University; Sabau, Adrian S [ORNL; Daniel, Claus [ORNL; Dudney, Nancy J [ORNL

2013-01-01T23:59:59.000Z

379

Process of Equiaxed Grains of RE-Al Alloy under Slope Vibration  

SciTech Connect

A new technique using slope vibration casting process during heating and isothermal holding period to prepare Al-7Si-2RE alloy has been studied. The small, near-spherical and non-dendritic microstructure with the semi-solid processing requirements has been obtained. Experiments show that the cooling method, pouring process and the convection of melt caused by slope vibration had significant effects on the formation of near-spherical primary gains. The water-cooled copper mold casting with slope vibration at the temperature near liquidus can obtain Al-7Si-2RE alloy with small homogeneous equiaxed grains, the average grain diameter is 48.3 mum, and the average grain roundness is 1.92.

Xie Shikun; Yi Rongxi; Pan Xiaoliang; Zheng Xiaoqiu; Guo Xiuyan [School of Engineering, Jinggangshan University, Ji'an, 343009 (China)

2010-06-15T23:59:59.000Z

380

Examination of the solidification macrostructure of spheroidal and flake graphite cast irons using DAAS and ESBD  

Science Conference Proceedings (OSTI)

This investigation focuses on the study of the solidification macrostructure of sand cast flake and spheroidal graphite cast irons. The macrostructure is revealed by using a special technique developed earlier by the authors, called Direct Austempering After Solidification. The observations make use of conventional metallography and Electron Back Scattering Diffraction. The latter technique allows a more detailed observation of the morphology of the austenite grains and the microstructure of the matrix. The results of Electron Back Scattering Diffraction validate the observations made using the macrographic technique. It is verified that the solidification of both flake and spheroidal graphite cast irons is dominated by the growth of large austenite dendrites that form a grain pattern similar to that usually found in most metallic alloys.

Rivera, G. [Metallurgy Division INTEMA, National University of Mar del Plata, CONICET, J. B. Justo 4302 (B7608FDQ) Mar del Plata (Argentina); Calvillo, P.R. [Department of Metallurgy and Materials Science, Ghent University (Belgium); Boeri, R. [Metallurgy Division INTEMA, National University of Mar del Plata, CONICET, J. B. Justo 4302 (B7608FDQ) Mar del Plata (Argentina)], E-mail: boeri@fi.mdp.edu.ar; Houbaert, Y. [Department of Metallurgy and Materials Science, Ghent University (Belgium); Sikora, J. [Metallurgy Division INTEMA, National University of Mar del Plata, CONICET, J. B. Justo 4302 (B7608FDQ) Mar del Plata (Argentina)], E-mail: jsikora@fi.mdp.edu.ar

2008-09-15T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Zinc electrode and rechargeable zinc-air battery  

DOE Patents (OSTI)

An improved zinc electrode is disclosed for a rechargeable zinc-air battery comprising an outer frame and a porous foam electrode support within the frame which is treated prior to the deposition of zinc thereon to inhibit the formation of zinc dendrites on the external surface thereof. The outer frame is provided with passageways for circulating an alkaline electrolyte through the treated zinc-coated porous foam. A novel rechargeable zinc-air battery system is also disclosed which utilizes the improved zinc electrode and further includes an alkaline electrolyte within said battery circulating through the passageways in the zinc electrode and an external electrolyte circulation means which has an electrolyte reservoir external to the battery case including filter means to filter solids out of the electrolyte as it circulates to the external reservoir and pump means for recirculating electrolyte from the external reservoir to the zinc electrode.

Ross, Jr., Philip N. (Kensington, CA)

1989-01-01T23:59:59.000Z

382

Recent advances in lithium ion technology  

Science Conference Proceedings (OSTI)

Lithium ion technology is based on the use of lithium intercalating electrodes. Carbon is the most commonly used anode material, while the cathode materials of choice have been layered lithium metal chalcogenides (LiMX{sub 2}) and lithium spinel-type compounds. Electrolytes may be either organic liquids or polymers. Although the first practical use of graphite intercalation compounds as battery anodes was reported in 1981 for molten salt cells (1) and in 1983 for ambient temperature systems (2) it was not until Sony Energytech announced a new lithium ion rechargeable cell containing a lithium ion intercalating carbon anode in 1990, that interest peaked. The reason for this heightened interest is that these cells have the high energy density, high voltage and fight weight of metallic lithium systems plus a very long cycle life, but without the disadvantages of dendrite formation on charge and the safety considerations associated with metallic lithium.

Levy, S.C.

1995-01-01T23:59:59.000Z

383

Mesoscale morphologies in polymer thin films.  

Science Conference Proceedings (OSTI)

In the midst of an exciting era of polymer nanoscience, where the development of materials and understanding of properties at the nanoscale remain a major R&D endeavor, there are several exciting phenomena that have been reported at the mesoscale (approximately an order of magnitude larger than the nanoscale). In this review article, we focus on mesoscale morphologies in polymer thin films from the viewpoint of origination of structure formation, structure development and the interaction forces that govern these morphologies. Mesoscale morphologies, including dendrites, holes, spherulites, fractals and honeycomb structures have been observed in thin films of homopolymer, copolymer, blends and composites. Following a largely phenomenological level of description, we review the kinetic and thermodynamic aspects of mesostructure formation outlining some of the key mechanisms at play. We also discuss various strategies to direct, limit, or inhibit the appearance of mesostructures in polymer thin films as well as an outlook toward potential areas of growth in this field of research.

Ramanathan, M.; Darling, S. B. (Center for Nanoscale Materials)

2011-06-01T23:59:59.000Z

384

Silicon web process development. Low Cost Solar Array Project: Large Area Silicon Test Task. Annual report, April 1978-April 1979  

DOE Green Energy (OSTI)

Silicon dendritic web is a unique mode of ribbon growth in which crystallographic and surface tension forces, rather than shaping dies, are used to control crystal form. The single crystal webs, typically 2-4 cm wide, have been made into solar cells which exhibit AMl conversion efficiencies as high as 15.5%. During crystallization, silicon webs effectively segregate metal impurities to the melt (k/sub eff/ approx. 10/sup -5/) so that the use of cheaper, less pure silicon as feedstock for crystal growth appears feasible. A research program to significantly increase web output rate and to show the feasibility for simultaneous melt replenishment and growth is described. Also, an economic analysis of the silicon web process is presented. (WHK)

Duncan, C.S.; Hopkins, R.H.; Seidensticker, R.G.; McHugh, J.P.; Hill, F.E.; Heimlich, M.E.; Driggers, J.M.

1979-01-01T23:59:59.000Z

385

Simulated Electrocortical Activity at Microscopic, Mesoscopic, and Global Scales  

E-Print Network (OSTI)

Simulation of electrocortical activity requires (a) determination of the most crucial features to be modelled, (b) specification of state equations with parameters that can be determined against independent measurements, and (c) explanation of electrical events in the brain at several scales. We report our attempts to address these problems, and show that mutually consistent explanations, and simulation of experimental data can be achieved for cortical gamma activity, synchronous oscillation, and the main features of the EEG power spectrum including the cerebral rhythms and evoked potentials. These simulations include consideration of dendritic and synaptic dynamics, AMPA, NMDA, and GABA receptors, and intracortical and cortical/subcortical interactions. We speculate on the way in which Hebbian learning and intrinsic reinforcement processes might complement the brain dynamics thus explained, to produce elementary cognitive operations.

J J Wright; et al.

2003-01-01T23:59:59.000Z

386

Cuttings Analysis At Long Valley Caldera Area (Pribnow, Et Al., 2003) |  

Open Energy Info (EERE)

2003) 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Cuttings Analysis At Long Valley Caldera Area (Pribnow, Et Al., 2003) Exploration Activity Details Location Long Valley Caldera Area Exploration Technique Cuttings Analysis Activity Date Usefulness useful DOE-funding Unknown Notes Here we present a detailed thermal conductivity profile for LVEW (Fig. 5a). Measurements were performed at the geothermal laboratory of the USGS on chips and core samples using divided bar and needle probe instruments. Detailed descriptions of these instruments and measurement procedures are given in Sass et al. (1971a,b). At shallow depths in the caldera References Daniel F. C. Pribnow, Claudia Schutze, Suzanne J. Hurter, Christina Flechsig, John H. Sass (2003) Fluid Flow In The Resurgent Dome Of Long

387

Microsoft PowerPoint - eLens status Anerella 101111.pptx  

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

October 11 2011 October 11 2011 October 11, 2011 1 E-Lens - General * All parts for vertical cold test assembly in process in CS, expected delivery 10/28 (SP) C ld t t d i k ti * Cold mass, cryostat drawing work continues (LR/SP/PK/SS) * Yoke material - received, in CS for machining f d P * Cryostatting fixture Mods in CS - PK * Vertical cold test top hat, hanging support design complete, released to CS * Magnetic Needle Tooling - all parts in CS, some parts complete, expected delivery ~ 10/30 (PK) * Coil status - following slides g 2 Corrector coils * 1 st Corrector: * Electrical tests complete * Electrical tests complete * Needs helium holes in FG * 2 nd Corrector: * (20) 0.5 m coil electrical tests complete (JE) * (4) 2.5 m coils wound (DM) 3 Main Solenoid Coils 1 st main solenoid * All stainless steel support sleeve

388

Environment, Health and Safety (EH&S): Biosafety Manual: 7.0 Standards,  

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

7.0 Standards, Policies, References, and Resources 7.0 Standards, Policies, References, and Resources 7.1 Standards 7 CFR 331 and 9 CFR 121, Possession, Use, and Transfer of Biological Agents and Toxins, U.S. Department of Agriculture (USDA), Animal and Plant Health Inspection Service (APHIS) 7 CFR 330, Plant Pest Regulations; General; Plant Pests; Soil, Stone, and Quarry Products; Garbage. Importation of Plant Pests, USDA/APHIS 9 CFR Parts 92, 94, 95 96, 122 and 130 (note especially Part 122, Organisms and Vectors). Importation of Etiologic Agents of Livestock, Poultry, and Other Animal Diseases; USDA/APHIS 10 CFR 851, Worker Safety and Health Program, Department of Energy (DOE) 29 CFR 1904.8, Recording criteria for needle stick and sharps injuries, Occupational Safety and Health Administration (OSHA)

389

Advances In Geothermal Resource Exploration Circa 2007 | Open Energy  

Open Energy Info (EERE)

Exploration Circa 2007 Exploration Circa 2007 Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Conference Paper: Advances In Geothermal Resource Exploration Circa 2007 Details Activities (8) Areas (1) Regions (0) Abstract: At the outset of the 21st centry, the geothermal community at-large is essentially attempting to use available exploration tools and techniques to find needles (geothermal occurrences) in very large haystacks (expanses of unexplored territory). Historically teh industry has relied on teh presence of surface manifestations of subsurface heat, such as hot springs, fumaroles, or geyers as a firt-order exploration tool., Regrettably, even when such surface manifestations are investigated more closely, there is no proven technique or techniques that can bve used with

390

NSLS Vacuum  

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

Vacuum Vacuum Safe Guards X-Ray Feedthroughs VUV Feedthroughs R&D "Much ado about nothing", a popular title from English literature, has been quoted often to vacuum technologists relative to our work. In the real world there is much to do to obtain the nothingness of a good vacuum! There is even more to achieving the good ultra-high vacuum (UHV) needed for the NSLS storage rings. Today's vacuum technologist must be familiar with a large variety of pumps, gauges, chambers, materials, processes, valves, controls, diagnostics, etc., related to vacuum. A practical example would be to measure, find, and fix a system vacuum leak - a task easily compared to finding a needle in a haystack. A good knowledge of vacuum systems and skill with mass spectrometers is required for success. The vacuum

391

Why Sequence Agaricus bisporus?  

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

Agaricus bisporus? Agaricus bisporus? Agaricus bisporus is a soil-growing homobasidiomycete fungus that plays an ecologically significant role in the degradation of leaf and needle litter in temperate forests. Soils contain humic compounds derived from modified lignin and other recalcitrant aromatic compounds, and represent a different catabolic challenge from the intact woody tissues colonized by many other fungi. Thus, A. bisporus forms an important model for carbon sequestration studies to understand the persistence of mycelial material in humus and to determine the role of fungi in bioconversion of plant materials to humic acids. The homobasidiomycete species is arguably the most well studied member of the family Agaricaceae, a large, diverse and economically important group of fungi. Comprehending the carbon cycling role of the

392

Growth mechanism of in situ synthesized TiB{sub w} in titanium matrix composites prepared by common casting technique  

SciTech Connect

Titanium matrix composites reinforced with TiB and RE{sub 2}O{sub 3} (RE = rare earth metal) were fabricated by a non-consumable arc-melting technology utilizing chemical reaction between titanium, B{sub 2}O{sub 3} and RE. Microstructural characterization of in situ synthesized TiB was performed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). When the volume percentage is relatively low, the TiB shows a typical fine needle-shape due to the solidification process. The TiB whiskers have a B27 crystal structure and grow along the B27 [010] direction. Based on Density Functional Theory (DFT), the surface energies of B27 (100), (101), (101-bar ) and (001) planes were calculated. The results show that the cross sections of TiB whiskers are hexagonal and consist of (100), (101), (101-bar ) planes.

Lu, W.J. [State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030 (China)], E-mail: luweijie@sjtu.edu.cn; Xiao, L.; Geng, K.; Qin, J.N.; Zhang, D. [State Key Laboratory of Metal Matrix Composites, Shanghai Jiao Tong University, 1954 Huashan Road, Shanghai 200030 (China)

2008-07-15T23:59:59.000Z

393

Characterization of Motor Unit Behavior in Patients with Amyotrophic Lateral Sclerosis  

E-Print Network (OSTI)

Abstract — In this study, we investigated the behavior of active motor units identified via analysis of electromyographic (EMG) signals recorded from the first dorsal interosseous (FDI) muscle using a quadrifilar needle electrode. Data was collected from control subjects and patients with both lower (LMN) and upper (UMN) motor neuron dominant forms of amyotrophic lateral sclerosis (ALS). EMG recordings were gathered during isometric contractions reaching 20 or 50 % of the force output produced during a maximum voluntary contraction (MVC). Recordings were analyzed using available EMG decomposition software (EMGLAB). Results showed differences in mean motor unit firing rates between patients with ALS and control subjects. Differences were also observed between patients with LMN- and UMN-dominant forms of ALS. Motor unit substitution was observed in patients despite the contractions lasting just a few seconds. Finally, we observed that motor unit action potential (MUAP) waveforms recorded from patients were more complex than those recorded from control subjects as often observed in motor neuron diseases.

Patrick K. Kasi; Lisa S. Krivickas; Melvin Meister; Effie Chew; Paolo Bonato; Maurizio Schmid; Roma Tre; Gary Kamen; Pu Liu

2009-01-01T23:59:59.000Z

394

Guidance for Preparing ENERGY STAR Challenge for Industry Plant Profile  

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

Columbus Facility Columbus Facility BD Medical 1852 10th Avenue, Columbus, NE 68601 In 1949, BD began operations in Columbus, Nebraska with its first manufacturing facility outside of the company's original location in New Jersey. Henry Becton and Fairleigh Dickinson, Jr. considered sites in 30 states before deciding on Columbus, Nebraska. Impressed by the work ethic of the residents, BD purchased a 24,000-sq. ft. building and hired 15 people to manufacture glass fever thermometers. Today, the BD Medical - Medical Surgical Systems (Columbus West) facility occupies 522,000 square feet and employs over 830 associates. This site is BD's largest worldwide producer of needles and saline syringes. BD is a leading global

395

GTP ARRA Spreadsheet | Open Energy Information  

Open Energy Info (EERE)

GTP ARRA Spreadsheet GTP ARRA Spreadsheet Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Reference Material: GTP ARRA Spreadsheet Details Activities (243) Areas (25) Regions (0) Abstract: Spreadsheet of ARRA projects provided by DOE on 3/24/2011 listing ARRA projects and exploration techniques used for each project. Author(s): Unknown Published: GTP, 2011/01/01 Document Number: Unavailable DOI: Unavailable 2-M Probe At Black Warrior Area (DOE GTP) 2-M Probe At Flint Geothermal Area (DOE GTP) 2-M Probe At Fort Bliss Area (DOE GTP) 2-M Probe At Gabbs Valley Area (DOE GTP) 2-M Probe At Mcgee Mountain Area (DOE GTP) 2-M Probe At Pilgrim Hot Springs Area (DOE GTP) 2-M Probe At Silver Peak Area (DOE GTP) Acoustic Logs At The Needles Area (DOE GTP) Aeromagnetic Survey At Crump's Hot Springs Area (DOE GTP)

396

Core Analysis At Long Valley Caldera Area (Pribnow, Et Al., 2003) | Open  

Open Energy Info (EERE)

Pribnow, Et Al., 2003) Pribnow, Et Al., 2003) Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: Core Analysis At Long Valley Caldera Area (Pribnow, Et Al., 2003) Exploration Activity Details Location Long Valley Caldera Area Exploration Technique Core Analysis Activity Date Usefulness useful DOE-funding Unknown Notes Here we present a detailed thermal conductivity profile for LVEW (Fig. 5a). Measurements were performed at the geothermal laboratory of the USGS on chips and core samples using divided bar and needle probe instruments. Detailed descriptions of these instruments and measurement procedures are given in Sass et al. (1971a,b). At shallow depths in the caldera References Daniel F. C. Pribnow, Claudia Schutze, Suzanne J. Hurter, Christina

397

Thermal Gradient Holes At Coso Geothermal Area (1974) | Open Energy  

Open Energy Info (EERE)

Coso Geothermal Area (1974) Coso Geothermal Area (1974) Exploration Activity Details Location Coso Geothermal Area Exploration Technique Thermal Gradient Holes Activity Date 1974 Usefulness useful DOE-funding Unknown Exploration Basis Use heat flow studies for the first time at Coso to indicate the presence or absence of abnormal heat Notes Located 10 sites for heat flow boreholes using available seismic ground noise and electrical resistivity data; data collected from 9 of 10; thermal conductivity measurements were completed using both the needle probe technique and the divided bar apparatus with a cell arrangement. In the upper few hundred meters of the subsurface heat is being transferred by a conductive heat transfer mechanism with a value of ~ 15 µcal/cm2sec; the background heat flow is ~ 3.5 HFU.

398

Sequoia tops Graph 500 list of 'big data' supercomputers  

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

ATL062113_graph ATL062113_graph 06/21/2013 The Livermore Lab's Sequoia supercomputer topped the biannual Graph 500 list of the world's fastest systems for "big data" this week. The Graph 500 benchmark measures the speed with which a supercomputer can "connect the dots" within a massive set of data. Sequoia traversed 15,363 connections per second. Sequoia tops Graph 500 list of 'big data' supercomputers Donald B Johnston, LLNL, (925) 423-4902, johnston19@llnl.gov LLNL's 20 petaflops Sequoia supercomputer has retained its No. 1 ranking on the Graph 500 list, a measure of a system's ability to conduct analytic calculations -- finding the proverbial needle in the haystack. An IBM Blue Gene Q system, Sequoia was able to traverse 15,363 giga edges per second on a scale of 40 graph (a graph with 2^40 vertices). The new

399

Sequoia retains top ranking on Graph 500 for third year running  

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

12113_sequoia 12113_sequoia 11/21/2013 High Resolution Image Lawrence Livermore's Sequoia supercomputer again retained its No. 1 ranking on the Graph 500 list. Sequoia retains top ranking on Graph 500 for third year running Donald B Johnston, LLNL, (925) 423-4902, johnston19@llnl.gov High Resolution Image From left: LLNL's Adam Bertsch, Dona Crawford and Scott Futral with the certificate for No. 1 on the Graph 500 in the SC13 DOE booth. LLNL's 20 petaflops Sequoia supercomputer again retained its No. 1 ranking on the Graph 500 list, a measure of a system's ability to conduct analytic calculations -- finding the proverbial needle in the haystack. An IBM Blue Gene Q system, Sequoia was able to traverse 15,363 giga edges per second on a scale of 40 graph (a graph with 2^40 vertices). The new

400

Slide 1  

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

Laboratory Laboratory Matthew Myrick (myrick3@llnl.gov) Lawrence Livermore National Laboratory, P. O. Box 808, Livermore, CA 94551 This work performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 Mining Proxy Logs: Finding Needles In Haystacks 2010-05-19 2 Lawrence Livermore National Laboratory Disclaimer  Our security infrastructure is a work in progress * This presentation is for educational purposes * This discussion pertains to our "Unclassified" environment ONLY * Hopefully we can make things better by learning from each other If you see problems please say something 3 Lawrence Livermore National Laboratory Have Fun! 4 Lawrence Livermore National Laboratory

Note: This page contains sample records for the topic "dendrite lacy needle" 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

 

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

The spin doctor The spin doctor Inelastic neutron scattering data from a SrCr2O4 powder sample. Inelastic neutron scattering data from a SrCr2O4 powder sample. (hi-res image) An electron spin can be compared to the needle of a compass that points either north or south. Some electrons in a full shell point up, canceling out the electromagnetic fields of an equal number of electrons that point down. The field of an electron spin that is not canceled in an unfilled shell makes some elements magnetic?iron, nickel, chromium, vanadium, and the rare earths. In the ARCS experiment at SNS, the novel material being probed with neutrons is a crystalline powder of a strontium-chromium-oxygen (SrCr2O4) compound, an antiferromagnetic material made at the Institute for Quantum

402

Fermilab Today  

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

7, 2006 7, 2006 Subscribe | Contact Fermilab Today | Archive | Classifieds Search GO Calendar Thurs., December 7 12:00 p.m. Special Particle Astrophysics Seminar - The Dark Side (WH-6W) (NOTE DATE, TIME, LOCATION) Speaker: G. Rigoloulos, Universit Utrecht Title: The Evolution of Non-Linear Perturbations in Inflation 1:00 p.m. ALCPG ILC Physics and Detector Seminar - West Wing (WH-10NW) Speaker: M. Thompson, University of Cambridge Title: Particle Flow Algorithms: Current Status 2:30 p.m. Theoretical Physics Seminar - Curia II Speaker: C. Berger, Stanford Linear Accelerator Center Title: Bootstrapping One-Loop Amplitudes (Needles in Large HaystaCks) 4:00 p.m. Accelerator Physics and Technology Seminar - Curia II (NOTE LOCATION) Speaker: M. Convery, Fermilab

403

EBIS Project Status Meeting  

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

4, 2012 4, 2012 Electron Lens 2 E-Lens Magnet, Tooling Magnet * Cold mass, cryostat drawing work continues (SP/PK/SS) * Yoke NLE Restraint Cylinder - 1 more rework for leads (RC/SP) * Part orders being prioritized, released; bellows, cryo valve, heat shield, etc. (SRP) Tooling * Testing Top Hat assembly complete (RM/SD/DC/WM etc.) * Cryostatting, pressure test fixture Mods in CS (PK) - supporting schedule * Magnetic Needle Tooling - COMPLETE 3 Main Solenoid Coils 2 nd main solenoid * CS machining complete * Stainless steel support machining complete 4 AFF, FF Solenoid coils * FF coil #1 - FF coil #4 * Mods complete to ID to fit to main support tube * AFF #3 Final electrical tests complete (DI) * AFF #4 overwrap & cure, Final electrical tests complete (DI) 5 eLens - Cold Test Assembly Magnet #1:

404

Real-time Studies of Shocked Polycrystalline Materials with Single-Pulse X-ray Diffraction  

Science Conference Proceedings (OSTI)

Characteristic K-? x-rays used for single-pulse XRD are conventionally produced by a 37-stage high-voltage Marx pulse generator coupled to a vacuum needle-and-washer x-ray diode via coaxial transmission line. A large field-of-view x-ray image plate detection system typically enables observation of several Debye-Scherrer rings. Recently, we have developed a fiber-optic reducer, coupled to a CCD camera, to obtain low-noise, large field-of-view images. The direct beam spot is produced by bremsstrahlung radiation attenuated by a twomillimeter tungsten beam stop. Determination of the direct beam position is necessary to perform the ring integration.

Dane V. Morgan

2011-05-25T23:59:59.000Z

405

Monovalve with integrated fuel injector and port control valve, and engine using same  

DOE Patents (OSTI)

An engine includes an engine casing that defines a hollow piston cavity separated from an exhaust passage and an intake passage by a valve seat. A gas exchange valve member is positioned adjacent the valve seat and is moveable between an open position and a closed position. The gas exchange valve member also defines an opening that opens into the hollow piston cavity. A needle valve member is positioned in the gas exchange valve member adjacent a nozzle outlet and is moveable between an inject position and a blocked position. A port control valve member, which has a hydraulic surface, is mounted around the gas exchange valve member and moveable between an intake position and an exhaust position. A pilot valve is moveable between a first position at which the port control hydraulic surface is exposed to a source of high pressure fluid, and a second position at which the port control hydraulic surface is exposed to a source of low pressure fluid.

Milam, David M. (Metamora, IL)

2001-11-06T23:59:59.000Z

406

Science and Technology Review January/February 2012  

Science Conference Proceedings (OSTI)

This month's issue has the following articles: (1) Dawn of a New Era of Scientific Discovery - Commentary by Edward I. Moses; (2) At the Frontiers of Fundamental Science Research - Collaborators from national laboratories, universities, and international organizations are using the National Ignition Facility to probe key fundamental science questions; (3) Livermore Responds to Crisis in Post-Earthquake Japan - More than 70 Laboratory scientists provided round-the-clock expertise in radionuclide analysis and atmospheric dispersion modeling as part of the nation's support to Japan following the March 2011 earthquake and nuclear accident; (4) A Comprehensive Resource for Modeling, Simulation, and Experiments - A new Web-based resource called MIDAS is a central repository for material properties, experimental data, and computer models; and (5) Finding Data Needles in Gigabit Haystacks - Livermore computer scientists have developed a novel computer architecture based on 'persistent' memory to ease data-intensive computations.

Nikolic, R J

2011-12-20T23:59:59.000Z

407

Contra Costa County's one-year experience with gasohol  

Science Conference Proceedings (OSTI)

Starting August 1, 1979, a one-year gasohol test was conducted by Contra Costa County. A total of 30 county pool cars were on test - 15 on gasohol and 15 similar cars on gasoline as a control group. Findings were as follows. There were no fuel-related maintenance problems in either the gasohol or gasoline groups of cars. Cool weather driveability for the gasohol cars was the same or better than gasoline cars. No vapor lock or other hot driveability problems were reported for either fuel. Fuel economy of the gasohol cars was about 5% poorer than that of the gasoline cars. Fuel system deposits with gasohol were increased and differed in character compared to gasoline. Also, the gasohol carburetors showed more inlet needle valve tip wear. However, to date, the observed deposits and wear with gasohol have not caused any apparent problems.

Gibbs, L.M.; Gilbert, B.J.

1981-01-01T23:59:59.000Z

408

Optically generated ultrasound for enhanced drug delivery  

DOE Patents (OSTI)

High frequency acoustic waves, analogous to ultrasound, can enhance the delivery of therapeutic compounds into cells. The compounds delivered may be chemotherapeutic drugs, antibiotics, photodynamic drugs or gene therapies. The therapeutic compounds are administered systemically, or preferably locally to the targeted site. Local delivery can be accomplished through a needle, cannula, or through a variety of vascular catheters, depending on the location of routes of access. To enhance the systemic or local delivery of the therapeutic compounds, high frequency acoustic waves are generated locally near the target site, and preferably near the site of compound administration. The acoustic waves are produced via laser radiation interaction with an absorbing media and can be produced via thermoelastic expansion, thermodynamic vaporization, material ablation, or plasma formation. Acoustic waves have the effect of temporarily permeabilizing the membranes of local cells, increasing the diffusion of the therapeutic compound into the cells, allowing for decreased total body dosages, decreased side effects, and enabling new therapies.

Visuri, Steven R. (Livermore, CA); Campbell, Heather L. (Baltimore, MD); Da Silva, Luiz (Danville, CA)

2002-01-01T23:59:59.000Z

409

Electric moulding of dispersed lipid nanotubes into a nanofluidic device  

E-Print Network (OSTI)

Hydrophilic nanotubes formed by lipid molecules have potential applications as platforms for chemical or biological events occurring in an attolitre volume inside a hollow cylinder. Here, we have integrated the lipid nanotubes (LNTs) by applying an AC electric field via plug-in electrode needles placed above a substrate. The off-chip assembly method has the on-demand adjustability of an electrode configuration, enabling the dispersed LNT to be electrically moulded into a separate film of parallel LNT arrays in one-step. The fluorescence resonance energy transfer technique as well as the digital microscopy visualised the overall filling of gold nanoparticles up to the inner capacity of an LNT film by capillary action, thereby showing the potential of this flexible film for use as a high-throughput nanofluidic device where not only is the endo-signalling and product in each LNT multiplied but also the encapsulated objects are efficiently transported and reacted.

Hiroshi Frusawa; Tatsuhiko Manabe; Eri Kagiyama; Ken Hirano; Naohiro Kameta; Mitsutoshi Masuda; Toshimi Shimizu

2013-07-13T23:59:59.000Z

410

Detection of human and rodent 5-HT3Breceptor subunits by anti-peptide polyclonal antibodies  

E-Print Network (OSTI)

as previously described [24,35]. For mouse tis- sues, 200 mg tissue was macerated with a needle in 0.5 ml of extraction buffer containing 200 mM Tris-HCl pH 8.0, 250 mM NaCl, 25 mM EDTA and 0.5% SDS. The solution was incubated at 50°C for 30 min and centrifuged... . Comput Appl Biosci 1988, 4:351-356. 31. Rice P, Longden I, Bleasby A: EMBOSS: the European Molecular Biology Open Software Suite. Trends Genet 2000, 16:276-277. 32. Maelicke A, Plumer-Wilk R, Fels G, Spencer SR, Engelhard M, Veltel D: Epitope mapping...

Reeves, David; Lummis, Sarah C R

2006-03-29T23:59:59.000Z

411

Rivesville multicell fluidized bed boiler. Annual technical progress report. July 1978-June 1979  

SciTech Connect

Design, construction and test program of a 300,000 lb/hr steam generating capacity multicell fluidized bed boiler (MFB), as a pollution free method of burning high-sulfur or highly corrosive coals, is being carried out. The concept involves burning fuels such as coal, in a fluidized bed of limestone particles that react with the sulfur compounds formed during combustion to reduce air pollution. Nitrogen oxide emissions are also reduced at the lower combustion temperatures. The CaSO/sub 4/ produced in the furnace is discharged with the ash or regenerated to CaO for reuse in the fluidized bed. Information is presented on continued operation of the Rivesville MFB steam generating plant in a commercial mode and for determining performance and emission characteristics; studies and tests on flyash characterization and reinjection, fuel feed eductors and needles, air distributor, corrosion-erosion and sulfur capture; engineering studies to improve MFB performance and reliability.

Not Available

1980-08-01T23:59:59.000Z

412

OBSERVATION AND MECHANISM OF HYDRIDE IN ZIRCALOY-4 AND LOCAL HYDRIDE RE-ORIENTATION INDUCED BY HIGH PRESSURE AT HIGH TEMPERATURES  

SciTech Connect

Hydrided Zircaloy-4 samples were produced by a gas charging method to desired amounts of hydrogen. For low hydrogen content samples, the hydrided platelets appear elongated and needle-like, orientated in the circumferential direction. Mechanical testing was carried out by the ring compression method at various temperatures. Samples with higher hydrogen concentration resulted in lower strain before fracture and reduced maximum load. The trend between temperature and ductility was also very clear: increasing temperatures resulted in increased ductility of the hydrided cladding. A single through-wall crack was observed for a hydrided sample having very high hydrogen concentration under ring compression testing. For samples having lower hydrogen concentrations, the fracture surfaces traversed both circumferential and radial directions, and for which voids were observed near the hydrides. Mechanical tests to study hydride reorientation in these samples are under way, and the results will be reported in the near future.

Yan, Yong [ORNL; Blackwell, Andrew S [ORNL; Plummer, Lee K [ORNL; Radhakrishnan, Balasubramaniam [ORNL; Gorti, Sarma B [ORNL; Clarno, Kevin T [ORNL

2013-01-01T23:59:59.000Z

413

Micronized-coal-water slurry sprays from a diesel engine positive displacement fuel injection system  

DOE Green Energy (OSTI)

Experiments have been conducted to characterize the sprays from a modified positive displacement fuel injection system for a diesel engine. Diesel fuel water and three concentrations of micronized-coal-water slurry were used in these experiments. The injection system includes an injection jerk pump driven by an electric motor, a specially designed diaphragm to separate the abrasive coal slurry fuel from the pump, and a single-hole fuel nozzle. The sprays were injected into a pressurized chamber equipped with windows. High speed movies and still photographs of the sprays were obtained. In addition, instaneous fuel line pressures and needle lifts were obtained. Data were acquired as a function of fluid, nozzle orifice diameter, rack setting and chamber conditions. The high speed movies were used to determine spray penetration and spray growth.

Caton, J.A.; Kihm, K.D.; Seshadri, A.K.; Zicterman, G. [Texas A and M Univ., College Station, TX (United States). Dept. of Mechanical Engineering

1991-12-31T23:59:59.000Z

414

Silicon solar cell process development, fabrication and analysis. Phase II. Annual report, 1 July 1979-30 June 1980  

DOE Green Energy (OSTI)

Solar cells were fabricated from EFG (RH) ribbons from multiple dies, silicon on ceramic (SOC), dendritic web, cast silicon by HEM, and semi-continuous CZ from both VARIAN and HAMCO. Baseline and improved solar cells were made from the sheets. Baseline solar cells processed in both Phase I and Phase II, involving cells from EFG, SOC, dendritic web, and HEM, indicated that no significant improvement in silicon sheet quality has been achieved in Phase II. Solar cells from semi-continuous CZ showed cell performance close to the conventional CZ control cells, although the cells from the semi-continuous CZ have shown wider performance range because of variation in crystalline perfection. Generally, process upgrading provided improvement in cell performance, the improvement depending on the process used and the quality of the sheet silicon. Study of the effect of grain size on solar cell performance suggested that the minimum grain size to make solar cells of 10% AMO efficiency is about 500 ..mu..m, which is expected to provide minimum module efficiency of 10% AMI. If other harmful impurities are added in the process of sheet growth, the minimum grain size must be increased. The BSF study showed that the higher the resistivity of the starting substrates, the greater the relative improvement in cell performance, probably because of greater shift in Fermi levels at the back L/H junction (pp+) and also because of the higher initial values of minority carrier diffusion length. This study also suggested that proper control of the back-surface field (BSF) process could minimize the junction shunting problems often introduced by the BSF processing.

Yoo, H.I.; Iles, P.A.; Ho, F.F.; Leung, D.C.

1980-01-01T23:59:59.000Z

415

Hydraulic fracturing of jointed formations  

DOE Green Energy (OSTI)

Measured by volume, North America's largest hydraulic fracturing operations have been conducted at Fenton Hill, New Mexico to create geothermal energy reservoirs. In the largest operation 21,000 m/sup 3/ of water were injected into jointed granitic rock at a depth of 3.5 km. Microearthquakes induced by this injection were measured with geophones placed in five wells drilled into, or very close, to the reservoir, as well as 11 surface seismometers. The large volume of rock over which the microearthquakes were distributed indicates a mechanism of hydraulic stimulation which is at odds with conventional fracturing theory, which predicts failure along a plane which is perpendicular to the least compressive earth stress. A coupled rock mechanics/fluid flow model provides much of the explanation. Shear slippage along pre-existing joints in the rock is more easily induced than conventional tensile failure, particularly when the difference between minimum and maximum earth stresses is large and the joints are oriented at angles between 30 and 60 degrees to the principal earth stresses, and a low viscosity fluid like water is injected. Shear slippage results in local redistribution of stresses, which allows a branching, or dendritic, stimulation pattern to evolve, in agreement with the patterns of microearthquake locations. These results are qualitatively similar to the controversial process known as ''Kiel'' fracturing, in which sequential injections and shut-ins are repeated to create dendritic fractures for enhanced oil and gas recovery. However, we believe that the explanation is shear slippage of pre-existing joints and stress redistribution, not proppant bridging and fluid blocking as suggested by Kiel. 15 refs., 10 figs.

Murphy, H.D.; Fehler, M.C.

1986-01-01T23:59:59.000Z

416

Solidification of hypereutectic Al-38 wt pct Cu alloy in microgravity and in unit gravity  

SciTech Connect

Solidification in microgravity aboard the space shuttle Endeavour resulted in a dramatic change in the morphology of the primary Al{sub 2}Cu phase compared to ground-based solidification in unit gravity. An Al-38 wt pct Cu ingot directionally solidified at a rate of 0.015 mm/s with a temperature gradient of 1.69 K/mm exhibited large, well-formed dendrites of primary Al{sub 2}Cu phase. Ingots solidified under similar conditions in unit gravity contained primary Al{sub 2}Cu phase with smooth, faceted surfaces. The primary Al{sub 2}Cu phase spacing in the microgravity ingot was much greater than that in the unit gravity ingot, 670 {micro}m compared to 171 {micro}m. It is suggested that thermosolutal mixing in the unit gravity ingot reduces the buildup of an Al-rich layer at the solid/liquid interface, which increases the stability of the interface resulting in smooth, faceted particles of Al{sub 2}Cu phase. It is also suggested that the large difference in primary phase spacings is due mostly to the difference in morphology rather than changes in parameters that might influence dendrite ripening mechanisms. The presence or absence of gravity had no effect on the interlamellar spacing of the inter-Al{sub 2}Cu phase eutectic. The ingot solidified in microgravity exhibited almost no longitudinal macrosegregation, in agreement with the theory of inverse segregation in the absence of thermosolutal convection. The ingot solidified in unit gravity exhibited considerable longitudinal macrosegregation, with the chilled end having about 6 wt pct more Cu than the average composition. It is not clear whether the segregation results from thermosolutal convection during solidification or from sedimentation during melting.

Yu, H.; Tandon, K.N.; Cahoon, J.R. [Univ. of Manitoba, Winnipeg, Manitoba (Canada). Dept. of Mechanical and Industrial Engineering

1997-05-01T23:59:59.000Z

417

Trees in the winter  

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

Trees in the winter Trees in the winter Name: John H Hersey Age: N/A Location: N/A Country: N/A Date: N/A Question: Why do some trees in the winter lose their leaves and some are able to keep their leaves? Replies: John, You can view the leaves on a tree as its food manufacturing factory. For some trees, especially those which live in areas which become cold in the winter, the 'factories' do their work during the normal growing season and are forced to 'shut-down' over the winter months. There are many evergreens which hold their foliage all year, simply dropping some of them periodically as they age and become less efficient to be replaced by new needles. Larches in the area where I live are conifers which lose their needles, which is quite rare. You can see that foliage on a tree presents a problem: water loss from a tree is greatest in its foliage. A tree has to 'decide' (and this has occurred over millennia by evolution) whether to hold its foliage or shed it. If it decides to hold the foliage, then it must provide a means of insuring conservation of water, especially in the winter months when dry cold winds remove water which is not easily replace due to liquid water in the environment being frozen. Many plant's adaptation has been the production of a waxy cuticle to 'seal-off' the leaf from the environment and reduce water loss. You can understand that in the northern latitude's winters, sunlight duration and intensity drops, and for some plants the best solution has involved shedding the leaves for the winter, and growing a new set of 'factories' in the spring.

418

An Approach for Preoperative Planning and Performance of MR-guided Interventions Demonstrated With a Manual Manipulator in a 1.5T MRI Scanner  

Science Conference Proceedings (OSTI)

Purpose: The aim of this work was to develop and test a general methodology for the planning and performance of robot-assisted, MR-guided interventions. This methodology also includes the employment of software tools with appropriately tailored routines to effectively exploit the capabilities of MRI and address the relevant spatial limitations. Methods: The described methodology consists of: (1) patient-customized feasibility study that focuses on the geometric limitations imposed by the gantry, the robotic hardware, and interventional tools, as well as the patient; (2) stereotactic preoperative planning for initial positioning of the manipulator and alignment of its end-effector with a selected target; and (3) real-time, intraoperative tool tracking and monitoring of the actual intervention execution. Testing was performed inside a standard 1.5T MRI scanner in which the MR-compatible manipulator is deployed to provide the required access. Results: A volunteer imaging study demonstrates the application of the feasibility stage. A phantom study on needle targeting is also presented, demonstrating the applicability and effectiveness of the proposed preoperative and intraoperative stages of the methodology. For this purpose, a manually actuated, MR-compatible robotic manipulation system was used to accurately acquire a prescribed target through alternative approaching paths. Conclusions: The methodology presented and experimentally examined allows the effective performance of MR-guided interventions. It is suitable for, but not restricted to, needle-targeting applications assisted by a robotic manipulation system, which can be deployed inside a cylindrical scanner to provide the required access to the patient facilitating real-time guidance and monitoring.

Seimenis, Ioannis [Medical Diagnostic Center 'Ayios Therissos' (Cyprus); Tsekos, Nikolaos V. [University of Huston, Medical Robotics Lab, Department of Computer Science (United States); Keroglou, Christoforos [University of Cyprus, Department of Electrical and Computer Engineering (Cyprus); Eracleous, Eleni [Medical Diagnostic Center 'Ayios Therissos' (Cyprus); Pitris, Constantinos [University of Cyprus, Department of Electrical and Computer Engineering (Cyprus); Christoforou, Eftychios G., E-mail: e.christoforou@ucy.ac.cy [University of Cyprus, KIOS Research Center (Cyprus)

2012-04-15T23:59:59.000Z

419

Radiofrequency Thermal Ablation: Increase in Lesion Diameter with Continuous Acetic Acid Infusion  

SciTech Connect

Purpose. To evaluate the influence of continuous infusion of acetic acid 50% during radiofrequency ablation (RFA) on the size of the thermal lesion produced. Methods. Radiofrequency (RF) was applied to excised bovine liver by using an expandable needle electrode with 10 retractable tines (LeVeen Needle Electrode, RadioTherapeutics, Sunnyvale, CA) connected to a commercially available RF generator (RF 2000, RadioTherapeutics, Sunnyvale, CA). Experiments were performed using three different treatment modalities: RF only (n = 15), RF with continuous saline 0.9% infusion (n = 15), and RF with continuous acetic acid 50% infusion (n = 15). RF duration, power output, tissue impedance, and time to a rapid rise in impedance were recorded. The ablated lesions were evaluated both macroscopically and histologically. Results. The ablated lesions appeared as spherical or ellipsoid, well-demarcated pale areas with a surrounding brown rim with both RF only and RF plus saline 0.9% infusion. In contrast, thermolesions generated with RF in combination with acetic acid 50% infusion were irregular in shape and the central portion was jelly-like. Mean diameter of the coagulation necrosis was 22.3 {+-} 2.1 mm (RF only), 29.2 {+-} 4.8 mm (RF + saline 0.9%) and 30.7 {+-} 5.7 mm (RF + acetic acid 50%), with a significant increase in the RF plus saline 0.9% and RF plus acetic acid 50% groups compared with RF alone. Time to a rapid rise in impedance was significantly prolonged in the RF plus saline 0.9% and RF plus acetic acid 50% groups compared with RF alone. Conclusions. A combination of RF plus acetic acid 50% infusion is able to generate larger thermolesions than RF only or RF combined with saline 0.9% infusion.

Lubienski, Andreas [Ruprecht-Karls-University Heidelberg, Department of Diagnostic Radiology (Germany)], E-mail: lubienski@radiologie.uni-luebeck.de; Duex, Markus [Hospital Northwest Frankfurt, Department of Radiology (Germany); Lubienski, Katrin; Grenacher, Lars; Kauffmann, Guenter [Ruprecht-Karls-University Heidelberg, Department of Diagnostic Radiology (Germany)

2005-12-15T23:59:59.000Z

420

Investigations into the Optimization of Multi-Source Strength Brachytherapy Treatment Procedures  

Science Conference Proceedings (OSTI)

The goal of this project is to investigate the use of multi-strength and multi-specie radioactive sources in permanent prostate implant brachytherapy. In order to fulfill the requirement for an optimal dose distribution, the prescribed dose should be delivered to the target in a nearly uniform dose distribution while simultaneously sparing sensitive structures. The treatment plan should use a small number of needles and sources while satisfying the treatment requirements. The hypothesis for the use of multi-strength and/or multi-specie sources is that a better treatment plan using fewer sources and needles could be obtained than by treatment plans using single-strength sources could reduce the overall number of sources used for treatment. We employ a recently developed greedy algorithm based on the adjoint concept as the optimization search engine. The algorithm utilizes and ''adjoint ratio'', which provides a means of ranking source positions, as the pseudo-objective function. It ha s been shown that the greedy algorithm can solve the optimization problem efficiently and arrives at a clinically acceptable solution in less than 10 seconds. Our study was inclusive, that is there was no combination of sources that clearly stood out from the others and could therefore be considered the preferred set of sources for treatment planning. Source strengths of 0.2 mCi (low), 0.4 mCi (medium), and 0.6 mCi (high) of {sup 125}I in four different combinations were used for the multi-strength source study. The combination of high- and medium-strength sources achieved a more uniform target dose distribution due to few source implants whereas the combination of low-and medium-strength sources achieved better sparing of sensitive tissues including that of the single-strength 0.4 mCi base case. {sup 125}I at 0.4 mCi and {sup 192}Ir at 0.12 mCi and 0.25 mCi source strengths were used for the multi-specie source study. This study also proved inconclusive , Treatment plans using a combination of two 0.12 mCi {sup 192}Ir sources and {sup 125}I sources or a combination of two 0.25 mCi {sup 192}Ir sources and {sup 125}I sources did not have better target and sensitive structures DVHs than that of the single specie {sup 125}I 0.4 mCi base case. However, because of the high dose delivered by a {sup 192}Ir source, the multi-specie treatment plan required fewer sources and needles and hence is less invasive than the treatment plan for the 0/4 mCi {sup 125}I base case.

D. L. Henderson; S. Yoo; B.R. Thomadsen

2002-09-30T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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

Pattern Formation and Growth Kinetics in Eutectic Systems  

Science Conference Proceedings (OSTI)

Growth patterns during liquid/solid phase transformation are governed by simultaneous effects of heat and mass transfer mechanisms, creation of new interfaces, jump of the crystallization units from liquid to solid and their rearrangement in the solid matrix. To examine how the above processes influence the scale of microstructure, two eutectic systems are chosen for the study: a polymeric system polyethylene glycol-p-dibromobenzene (PEG-DBBZ) and a simple molecular system succinonitrile (SCN)-camphor. The scaling law for SCN-camphor system is found to follow the classical Jackson-Hunt model of circular rod eutectic, where the diffusion in the liquid and the interface energy are the main physics governing the two-phase pattern. In contrast, a significantly different scaling law is observed for the polymer system. The interface kinetics of PEG phase and its solute concentration dependence thus have been critically investigated for the first time by directional solidification technique. A model is then proposed that shows that the two-phase pattern in polymers is governed by the interface diffusion and the interface kinetics. In SCN-camphor system, a new branch of eutectic, elliptical shape rodl, is found in thin samples where only one layer of camphor rods is present. It is found that the orientation of the ellipse can change from the major axis in the direction of the thickness to the direction of the width as the velocity and/or the sample thickness is decreased. A theoretical model is developed that predicts the spacing and orientation of the elliptical rods in a thin sample. The single phase growth patterns of SCN-camphor system were also examined with emphasis on the three-dimensional single cell and cell/dendrite transition. For the 3D single cell in a capillary tube, the entire cell shape ahead of the eutectic front can be described by the Saffmann-Taylor finger only at extremely low growth rate. A 3D directional solidification model is developed to characterize the cell shape and tip undercooling and the experimental results are compared with the predictions of the model. From the investigation of cell/dendrite transition, a model is proposed, from which the condition for the onset of the transition can be obtained.

Jing Teng

2007-12-01T23:59:59.000Z

422

Intensive culture of loblolly pine (Pinus taeda L.) seedlings on poorly drained sites in the Western Gulf region of the United States  

E-Print Network (OSTI)

A significant acreage of poorly drained sites occurs in the Western Gulf region of the United States. These sites experience standing water through much of the winter and spring, resulting in poor seedling survival. In addition, the sites occasionally experience a summer drought that affects tree growth. This study was designed to determine the effects of intensive forest management on seedling growth and physiology, and to enhance seedling performance under these harsh conditions. Fertilization, chemical vegetation control and mechanical site preparation were used in different combinations to test the effects of these intensive forest management tools on seedling above- and below-ground growth, survival, water status, gas exchange attributes, and nutrient concentrations in the foliage and soil solution. Ten sites were established in southern Arkansas in 1998 and 1999 to monitor loblolly pine (Pinus taeda L.) seedling performance in three consecutive growing seasons between 1998 and 2000. Fertilization, chemical vegetation control and mechanical site preparation increased above-ground growth. Growth increment from mechanical site preparation was comparable to that from fertilization. Survival was not affected by any treatment. Fertilization enhanced root growth, more so in the shallow soil layers. Subsoil bulk density greatly restricted root growth, resulting in decreased above-ground growth. Chemical vegetation control made more soil water available to the seedlings during drought, resulting in increased seedling water potential. The effect of chemical vegetation control on seedling water potential was absent in the early growing season when soil moisture was abundant. Seedlings on plots treated with bedding-plus-fertilizer or bedding alone experienced stomatal closure at times of severe water stress while those treated with chemical vegetation control were able to continue net carbon dioxide assimilation. Fertilization did not increase needle nutrient concentrations, but increased needle weight, thereby increasing total nutrient content. Fertilization increased base cation concentrations in the soil solution, but had no effect on nitrogen and phosphorus concentrations. Intensive forest management was found to be a viable tool for optimum loblolly pine seedling growth and survival on poorly drained sites in the Western Gulf region of the United States.

Rahman, Mohd Shafiqur

2003-08-01T23:59:59.000Z

423

Potential wells for AMPA receptors organized in ring nanodomains  

E-Print Network (OSTI)

By combining high-density super-resolution imaging with a novel stochastic analysis, we report here a peculiar nano-structure organization revealed by the density function of individual AMPA receptors moving on the surface of cultured hippocampal dendrites. High density regions of hundreds of nanometers for the trajectories are associated with local molecular assembly generated by direct molecular interactions due to physical potential wells. We found here that for some of these regions, the potential wells are organized in ring structures. We could find up to 3 wells in a single ring. Inside a ring receptors move in a small band the width of which is of hundreds of nanometers. In addition, rings are transient structures and can be observed for tens of minutes. Potential wells located in a ring are also transient and the position of their peaks can shift with time. We conclude that these rings can trap receptors in a unique geometrical structure contributing to shape receptor trafficking, a process that sustains synaptic transmission and plasticity.

N. Hoze D. Holcman

2013-09-13T23:59:59.000Z

424

Electrorefining cell with parallel electrode/concentric cylinder cathode  

DOE Patents (OSTI)

A cathode-anode arrangement for use in an electrolytic cell is adapted for electrochemically refining spent nuclear fuel from a nuclear reactor and recovering purified uranium and a mixture of uranium and plutonium for use as a fresh blanket and core fuel in a nuclear reactor. The arrangement includes a plurality of inner anodic dissolution baskets that are each attached to a respective support rod, are submerged in a molten lithium halide salt, and are rotationally displaced. An inner hollow cylindrical-shaped cathode is concentrically disposed about the inner anodic dissolution baskets. Concentrically disposed about the inner cathode in a spaced manner are a plurality of outer anodic dissolution baskets, while an outer hollow cylindrical-shaped cathode is disposed about the outer anodic dissolution baskets. Uranium is deposited from the anode baskets in a uniform cylindrical shape on the inner and outer cathode cylinders by rotating the anode baskets within the molten lithium halide salt. Scrapers located on each anode basket abrade and remove the spent fuel deposits on the surfaces of the inner and outer cathode cylinders, with the spent fuel falling to the bottom of the cell for removal. Cell resistance is reduced and uranium collection efficiency enhanced by increasing the electrode area and reducing the anode-cathode spacing for enhanced trapping and recovery of uranium dendrites scraped off of the cylindrical cathodes which may be greater in number than two.

Gay, E.C.; Miller, W.E.; Laidler, J.J.

1995-12-31T23:59:59.000Z

425

Review of lithium-ion technology  

DOE Green Energy (OSTI)

The first practical use of graphite intercalation compounds (GIC) as battery anodes was reported in a 1981 patent by Basu in which a molten salt cell was described having a negative electrode that consisted of lithium intercalated in graphite. A second patent by Basu, issued in 1983, described an ambient temperature rechargeable system which also utilized lithium intercalated in graphite as the anode. Work in this area progressed at a low level, however, until interest was sparked in 1990 when Sony Corporation announced a new ``lithium-ion`` rechargeable cell containing a lithium ion intercalating carbon anode. These cells have the advantages of metallic lithium systems; i.e., high energy density, high voltage, and light weight, without the disadvantages of dendrite formation on charge and the safety considerations associated with metallic lithium. Materials other than carbon have been studied as intercalation anodes. Examples are Fe{sub 2}O{sub 3}, WO{sub 2} and TiS{sub 2}. Although these alternate anode materials are of interest academically and for specialty applications, they do not hold much promise for widespread general use due to their increased weight and lower cell voltage. Studies of cathode materials for lithium-ion systems have centered on the transition metal chalcogenides. A number of these materials are capable of reversibly intercalating lithium ions at a useful potential versus lithium. Both organic liquids and polymers are candidate electrolytes for this technology.

Levy, S.C.; Cieslak, W.R.

1993-12-31T23:59:59.000Z

426

Materials issues in lithium ion rechargeable battery technology  

DOE Green Energy (OSTI)

Lithium ion rechargeable batteries are predicted to replace Ni/Cd as the workhorse consumer battery. The pace of development of this battery system is determined in large part by the availability of materials and the understanding of interfacial reactions between materials. Lithium ion technology is based on the use of two lithium intercalating electrodes. Carbon is the most commonly used anode material, while the cathode materials of choice have been layered lithium metal chalcogenides (LiMX{sub 2}) and lithium spinel-type compounds. Electrolytes may be either organic liquids or polymers. Although the first practical use of graphite intercalation compounds as battery anodes was reported in 1981 for molten salt cells and in 1983 for ambient temperature systems, it was not until Sony Energytech announced a new lithium ion intercalating carbon anode in 1990, that interest peaked. The reason for this heightened interest is that these electrochemical cells have the high energy density, high voltage and light weight of metallic lithium, but without the disadvantages of dendrite formation on charge, improving their safety and cycle life.

Doughty, D.H.

1995-07-01T23:59:59.000Z

427

Catechol oxidation by peroxidase-positive astrocytes in primary culture: an electron spin resonance study  

E-Print Network (OSTI)

In rodents, chronic estrogenization has been shown to induce degeneration of dendrites and myelin figures in the hypothalamic arcuate nucleus adjacent to peroxidase-positive astrocyte processes. Because in this brain region estradiol is metabolized to 2-hydroxyestradiol (catecholestrogen), we hypothesized that the latter may be oxidized by the astrocytic peroxidase activity to cytotoxic ortho-semiquinones as occurs in peripheral tissues. Cysteamine induces nonenzymatic peroxidase activity in cultured astroglia identical to that observed in viva. Using electron spin resonance, we demonstrate robust peroxidase-catalyzed oxidation of 2-hydroxyestradiol and dopamine by cysteaminepretreated astrocyte cultures relative to untreated controls. These results implicate the peroxidase-positive astrocytes in the pathogenesis of estradiol-related hypothalamic damage, parkinsonism, and other free-radical-related neurologic disorders. A distinct subpopulation of granule-laden astrocytes exhibiting an affinity for chrome alum hematoxylin and aldehyde fuchsin (Gomori stains) has been described in the periventricular brain of many vertebrates, including humans. Their cytoplasmic inclusions are rich in sulfhydryl groups, emit an orange-red autofluorescence, and stain intensely with diaminobenzidine (DAB), a marker ofendogenous peroxidase activity (Diepen et al., 1954; Creswell et al., 1964; Srebro, 197 1; Goldgefter, 1976; Schipper et al., 1988). Histochemical studies have implicated porphyrins and metalloporphyrins (heme) as the source of the autofluorescence and nonenzymatic peroxidase activity in these cells, respectively

Yashige Kotake; Edward G. Janzen

1991-01-01T23:59:59.000Z

428

Silicon web process development  

DOE Green Energy (OSTI)

Silicon dendritic web is a ribbon form of silicon produced from the melt without die shaping, and capable of fabrication into solar cells with greater than 15% AM1 conversion efficiency. This quarterly report describes the work carried out during the period April to June 1980, as part of Phase III of a DOE/JPL-sponsored effort to develop silicon web process technology compatible with the national goals for low cost photovoltaic output power. We have successfully demonstrated eight hours of silicon web growth with closed loop melt level control, a key contract milestone. The result was achieved using a feedback system in which the change in output from a laser melt level sensor was used to control the rate at which silicon pellets were fed to replace the material frozen into web crystal. The melt level was controlled to about +- 0.1mm, well within the range required for stable long term web growth. This is an important step toward the development of a fully automated silicon web growth machine. A second major highlight of this quarter was the completion of an engineering design for a semi-automated web growth machine embodying all the desired features developed so far as part of this program (including e.g. melt replenishment, level sensing and control) as well as some system simplifications. The completed design will serve as a basis for complete system automation.

Duncan, C.S.; Seidensticker, R.G.; McHugh, J.P.; Skutch, M.E.; Hopkins, R.H.

1980-07-15T23:59:59.000Z

429

Low Cost Solar Array Project: large area silicon sheet task. Silicon web process development. Quarterly report, October 1-December 31, 1979  

DOE Green Energy (OSTI)

Silicon dendritic web is a ribbon form of silicon which grows directly from the melt without dies and can produce solar cells with AM1 conversion efficiency over 15%. The primary objective of this program is to develop the technology to produce silicon web at a cost compatible with the national goal of 50 cents per peak watt (70 cents per watt in 1980$) of photovoltaic output power. During the period covered by this report the dominant activities were directed at developing methods to increase the period of simultaneous growth of web crystal with melt replenishment. To further this work, an adjustable thermal trimmer to dynamically balance the thermal loads during melt replenishment was designed and tested. The highlights of the concept and initial tests are described. Further studies of growth geometries to enhance web output rate were performed, the economic analysis for web growth was performed, and a potentially lower cost solid state power supply for the growth furnace was tested. Results are reported. (WHK)

Duncan, C.S.; Seidensticker, R.; Hopkins, R.H.; McHugh, J.P.; Hill, F.E.; Skutch, M.E.; Driggers, J.M.

1979-01-01T23:59:59.000Z

430

Silicon Materials Task of the Low Cost Solar Array Project (Phase II). Effect of impurities and processing on silicon solar cells. Phase II. Summary and eleventh quarterly report  

DOE Green Energy (OSTI)

The effects of various processes, metal contaminants and contaminant-process interactions on the performance of terrestrial silicon solar cells were investigated. A variety of aspects including thermal treatments, crystal growth rate, base doping concentration (low resistivity), base doping type (n vs. p), grain boundary structure, and carbon/oxygen-metal interactions (float zone vs Czochralski growth) were studied. The effects of various metallic impurities were studied, introduced singly or in combination into Czochralski, float zone and polycrystalline silicon ingots and into silicon ribbons grown by the dendritic web process. The totality of the solar cell data (comprising over 4000 cells) indicate that impurity-induced performance loss is primarily due to reduction in base diffusion length. Based on this assumption an analytical model has been developed which predicts cell performance as a function of metal impurity content. The model has now been verified for p-base material by correlating the projected and measured performance of solar cells made on 19 ingots bearing multiple impurities.

Hopkins, R.H.; Davis, J.R.; Blais, P.D.; Rohatgi, A.; Rai-Choudhury, P.; Hanes, M.H.; McCormick, J.R.

1978-07-01T23:59:59.000Z

431

An Agent Based Classification Model  

E-Print Network (OSTI)

The major function of this model is to access the UCI Wisconsin Breast Can- cer data-set[1] and classify the data items into two categories, which are normal and anomalous. This kind of classifi cation can be referred as anomaly detection, which discriminates anomalous behaviour from normal behaviour in computer systems. One popular solution for anomaly detection is Artifi cial Immune Sys- tems (AIS). AIS are adaptive systems inspired by theoretical immunology and observed immune functions, principles and models which are applied to prob- lem solving. The Dendritic Cell Algorithm (DCA)[2] is an AIS algorithm that is developed specifi cally for anomaly detection. It has been successfully applied to intrusion detection in computer security. It is believed that agent-based mod- elling is an ideal approach for implementing AIS, as intelligent agents could be the perfect representations of immune entities in AIS. This model evaluates the feasibility of re-implementing the DCA in an agent-based simulation environ- ...

Gu, Feng; Greensmith, Julie

2009-01-01T23:59:59.000Z

432

Microstructural analysis of laser weld fusion zone in Haynes 282 superalloy  

SciTech Connect

Analytical electron microscopy and spectroscopy analyses of the fusion zone (FZ) microstructure in autogenous laser beam welded Haynes 282 (HY 282) superalloy were performed. The micro-segregation patterns observed in the FZ indicate that Co, Cr and Al exhibited a nearly uniform distribution between the dendrite core and interdendritic regions while Ti and Mo were rejected into the interdendritic liquid during the weld solidification. Transmission electron diffraction analysis and energy dispersive X-ray microanalysis revealed the second phase particles formed along the FZ interdendritic region to be Ti-Mo rich MC-type carbide particles. Weld FZ solidification cracking, which is sometimes associated with the formation of {gamma}-{gamma}' eutectic in {gamma}' precipitation strengthened nickel-base superalloys, was not observed in the HY 282 superalloy. Modified primary solidification path due to carbon addition in the newly developed superalloy is used to explain preclusion of weld FZ solidification cracking in the material. - Highlights: Black-Right-Pointing-Pointer A newly developed superalloy was welded by CO{sub 2} laser beam joining technique. Black-Right-Pointing-Pointer Electron microscopy characterization of the weld microstructure was performed. Black-Right-Pointing-Pointer Identified interdendritic microconstituents consist of MC-type carbides. Black-Right-Pointing-Pointer Modification of primary solidification path is used to explain cracking resistance.

Osoba, L.O. [Department of Mechanical and Manufacturing Engineering, University of Manitoba, Winnipeg, Manitoba, R3T 5V6 (Canada); Ding, R.G. [Department of Metallurgy and Materials Engineering, University of Birmingham, Birmingham B15 2TT (United Kingdom); Ojo, O.A., E-mail: ojo@cc.umanitoba.ca [Department of Mechanical and Manufacturing Engineering, University of Manitoba, Winnipeg, Manitoba, R3T 5V6 (Canada)

2012-03-15T23:59:59.000Z

433

Rapid thermal processing of high-efficiency silicon solar cells with controlled in-situ annealing  

DOE Green Energy (OSTI)

Silicon solar cell efficiencies of 17.1%, 16.4%, 14.8%, and 14.9% have been achieved on FZ, Cz, multicrystalline (mc-Si), and dendritic web (DW) silicon, respectively, using simplified, cost-effective rapid thermal processing (RTP). These represent the highest reported efficiencies for solar cells processed with simultaneous front and back diffusion with no conventional high-temperature furnace steps. Appropriate diffusion temperature coupled with the added in-situ anneal resulted in suitable minority-carrier lifetime and diffusion profiles for high-efficiency cells. The cooling rate associated with the in-situ anneal can improve the lifetime and lower the reverse saturation current density (J{sub 0}), however, this effect is material and base resistivity specific. PECVD antireflection (AR) coatings provided low reflectance and efficient front surface and bulk defect passivation. Conventional cells fabricated on FZ silicon by furnace diffusions and oxidations gave an efficiency of 18.8% due to greater short wavelength response and lower J{sub 0}.

Doshi, P.; Rohatgi, A.; Ropp, M.; Chen, Z. [Georgia Institute of Technology, Atlanta, GA (United States). Univ. Center of Excellence for Photovoltaics Research and Education; Ruby, D. [Sandia National Labs., Albuquerque, NM (United States); Meier, D.L. [EBARA Solar, Inc., Large, PA (United States)

1995-01-01T23:59:59.000Z

434

Quantitative autoradiography of muscarinic and benzodiazepine receptors in the forebrain of the turtle, Pseudemys scripta  

SciTech Connect

The distribution of muscarinic and benzodiazepine receptors was investigated in the turtle forebrain by the technique of in vitro receptor autoradiography. Muscarinic binding sites were labeled with 1 nM /sup 3/H-quinuclidinyl benzilate (/sup 3/H-QNB), and benzodiazepine sites were demonstrated with the aid of 1 nM /sup 3/H-flunitrazepam (/sup 3/H-FLU). Autoradiograms generated on /sup 3/H-Ultrofilm apposed to tissue slices revealed regionally specific distributions of muscarinic and benzodiazepine binding sites that are comparable with those for mammalian brain. Dense benzodiazepine binding was found in the anterior olfactory nucleus, the lateral and dorsal cortices, and the dorsal ventricular ridge (DVR), a structure with no clear mammalian homologue. Muscarinic binding sites were most dense in the striatum, accumbens, DVR, lateral geniculate, and the anterior olfactory nucleus. Cortical binding sites were studied in greater detail by quantitative analysis of autoradiograms generated by using emulsion-coated coverslips. Laminar gradients of binding were observed that were specific for each radioligand; /sup 3/H-QNB sites were most dense in the inner molecular layer in all cortical regions, whereas /sup 3/H-FLU binding was generally most concentrated in the outer molecular layer and was least dense through all layers in the dorsomedial cortex. Because pyramidal cells are arranged in register in turtle cortex, the laminar patterns of receptor binding may reflect different receptor density gradients along pyramidal cell dendrites.

Schlegel, J.R.; Kriegstein, A.R.

1987-11-22T23:59:59.000Z

435

Geothermal reservoir well stimulation program. First-year progress report  

DOE Green Energy (OSTI)

The Geothermal Reservoir Well Stimulation Program (GRWSP) group planned and executed two field experiments at the Raft River KGRA during 1979. Well RRGP-4 was stimulated using a dendritic (Kiel) hydraulic fracture technique and Well RRGP-5 was stimulated using a conventional massive hydraulic fracture technique. Both experiments were technically successful; however, the post-stimulation productivity of the wells was disappointing. Even though the artificially induced fractures probably successfully connected with the natural fracture system, reservoir performance data suggest that productivity remained low due to the fundamentally limited flow capacity of the natural fractures in the affected region of the reservoir. Other accomplishments during the first year of the program may be summarized as follows: An assessment was made of current well stimulation technology upon which to base geothermal applications. Numerous reservoirs were evaluated as potential candidates for field experiments. A recommended list of candidates was developed which includes Raft River, East Mesa, Westmorland, Baca, Brawley, The Geysers and Roosevelt Hot Springs. Stimulation materials (fracture fluids, proppants, RA tracer chemicals, etc.) were screened for high temperature properties, and promising materials selected for further laboratory testing. Numerical models were developed to aid in predicting and evaluating stimulation experiments. (MHR)

Not Available

1980-02-01T23:59:59.000Z

436

IMPACT OF PARTICLE AGGLOMERATION ON ACCUMULATION RATES IN THE GLASS DISCHARGE RISER OF HLW MELTER  

SciTech Connect

The major factor limiting waste loading in continuous high-level radioactive waste (HLW) melters is an accumulation of particles in the glass discharge riser during a frequent and periodic idling of more than 20 days. An excessive accumulation can produce robust layers a few centimeters thick, which may clog the riser, preventing molten glass from being poured into canisters. Since the accumulation rate is driven by the size of particles we investigated with x-ray microtomography, scanning electron microscopy, and image analysis the impact of spinel forming components, noble metals, and alumina on the size, concentration, and spatial distribution of particles, and on the accumulation rate. Increased concentrations of Fe and Ni in the baseline glass resulted in the formation of large agglomerates that grew over the time to an average size of ~185±155 {micro}m, and produced >3 mm thick layer after 120 h at 850°C. The noble metals decreased the particle size, and therefore significantly slowed down the accumulation rate. Addition of alumina resulted in the formation of a network of spinel dendrites which prevented accumulation of particles into compact layers.

Kruger AA; Rodriguez CA: Matyas J; Owen AT; Jansik DP; Lang JB

2012-11-12T23:59:59.000Z

437

Review of the geothermal reservoir well stimulation program  

SciTech Connect

The overall program and the four experimental fracture stimulation treatments completed to date are described. The GRWSP is organized into two phases. Phase I consists of studies (literature and theoretical), laboratory investigations, and numerical work. Phase II will include the planning, execution and evaluation of six well stimulation treatments which utilize the technology developed in Phase I. Two stimulation experiments were performed at the Raft River, Idaho, Known Geothermal Resource Area (KGRA) in late-1979. This is a naturally fractured, hard rock reservoir with a relatively low geothermal resource temperature (300/sup 0/F). A conventional planar hydraulic fracture job was performed in Well RRGP-5 and a Kiel dendritic (or reverse flow) technique was utilized in Well RRGP-4. In mid-1980, two stimulation experiments were performed at the East Mesa, California, KGRA. The stimulation of Well 58-30 provided the first geothermal well fracturing experience in a moderate temperature (350/sup 0/F/sup +/) reservoir with matrix type rock properties. The two treatments consisted of a conventional hydraulic fracture of a deep, low permeability zone and a minifrac Kiel treatment of a shallow, high permeability zone in the same well. The stimulation experiment results to date were evaluated using short-term production tests, conventional pressure transient analysis, interference pressure data, chemical and radioactive tracers, borehole acoustic televiewer surveys, and numerical models.

Campbell, D.A.; Hanold, R.J.; Sinclair, A.R.; Vetter, O.J.

1981-01-01T23:59:59.000Z

438

Preorganized and immobilized ligands for metal ion separations. Final report, June, 1994--May, 1997  

SciTech Connect

Historically, much of the interest shown in f-element ion coordination chemistry has been driven by practical needs to devise separation schemes for lanthanide (Ln) and actinide (An) ions. However, few of the separations are completely satisfactory, and the basic chemical framework needed to achieve improvements is still poorly developed. As a result, studies of the fundamental aspects of f-element coordination chemistry are still pertinent not only to the evolution of improved separations, but also waste remediation, biological and medical applications of Ln ions, biochemistry of An ion decorporation, and new solid state materials preparations. The research objectives during the present grant period were to (1) synthesize new bifunctional and trifunctional chelating ligands, particularly in the class of new phosphonopyridine N-oxides; (2) characterize the structural features of the Ln and An coordination complexes formed by these ligands; (3) determine the extraction efficacy of these ligands; and (4) explore synthetic approaches for formation of dendritic polymers containing phosphoryl terminating groups. Some highlights of recently accomplished work and still-in-progress research are outlined.

Paine, R.T.

1997-12-01T23:59:59.000Z

439

Stress corrosion cracking behavior of Alloy 600 in high temperature water  

Science Conference Proceedings (OSTI)

SCC susceptibility of Alloy 600 in deaerated water at 360 C (statically loaded U-bend specimens) is dependent on microstructure and whether the material was cold-worked and annealed (CWA) or hot-worked and annealed (HWA). All cracking was intergranular, and materials lacking grain boundary carbides were most susceptible to SCC initiation. CWA tubing materials are more susceptible to SCC initiation than HWA ring-rolled forging materials with similar microstructures (optical metallography). In CWA tubing materials, one crack dominated and grew to a visible size. HWA materials with a low hot-working finishing temperature (980 C) and a high-temperature final anneal (>1040 C), with grain boundaries that are fully decorated, developed only microcracks in all specimens. These materials did not develop large, visually detectable cracks, even after more than 300 weeks exposure. A low-temperature thermal treatment (610 C for 7h), which reduces or eliminates SCC in Alloy 600, did not eliminate microcrack formation in high temperature processed HWA materials. Conventional metallographic and analytical electron microscopy (AEM) were done on selected materials to identify the factors responsible for the observed differences in cracking behavior. Major difference between high-temperature HWA and low-temperature HWA and CWA materials was that the high temperature processing and final annealing produced predominantly ``semi-continuous`` dendritic M{sub 7}C{sub 3} carbides along grain boundaries with a minimal amount of intragranular carbides. Lower temperature processing produced intragranular M7C3 carbides, with less intergranular carbides.

Webb, G.L.; Burke, M.G.

1995-07-01T23:59:59.000Z

440

Gadolinium Borosilicate Glass-Bonded Gd-Silicate Apatite: A Glass-Ceramic Nuclear Waste Form for Actinides  

SciTech Connect

A Gd-rich crystalline phase precipitated in a sodium gadolinium alumino-borosilicate glass during synthesis. The glass has a chemical composition of 45.39-31.13 wt% Gd2O3, 28.80-34.04 wt% SiO2, 10.75-14.02 wt% Na2O, 4.30-5.89 wt% Al2O3, and 10.75-14.91 wt% B2O3. Backscattered electron images revealed that the crystals are hexagonal, elongated, acicular, prismatic, skeletal or dendritic, tens of mm in size, some reaching 200 mm in length. Electron microprobe analysis confirmed that the crystals are chemically homogeneous and have a formula of NaGd9(SiO4)6O2 with minor B substitution for Si. The X-ray diffraction pattern of this phase is similar to that of lithium gadolinium silicate apatite. Thus, this hexagonal phase is a rare earth silicate with the apatite structure. We suggest that this Gd-silicate apatite in a Gd-borosilicate glass is a potential glass-ceramic nuclear waste form for actinide disposition. Am, Cm and other actinides can easily occupy the Gd-sites. The potential advantages of this glass-ceramic waste form include: (1) both the glass and apatite can be used to immobilize actinides, (2) silicate apatite is thermodynamically more stable than the glass, (3) borosilicate glass-bonded Gd-silicate apatite is easily fabricated, and (4) the Gd is an effective neutron absorber.

Zhao, Donggao (Michigan, Univ Of - Ann Arbor); Li, Liyu (BATTELLE (PACIFIC NW LAB)); Davis, Linda L. (ASSOC WESTERN UNIVERSITY); Weber, William J. (BATTELLE (PACIFIC NW LAB)); Ewing, Rodney C. (Michigan, Univ Of - Ann Arbor); KP Hart and GR Lumpkin

2001-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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

CRYSTALLIZATION IN HIGH-LEVEL WASTE GLASSES U.S. DEPARTMENT OF ENERGY OFFICE OF RIVER PROTECTION WTP ENGINEERING DIVISION  

SciTech Connect

Various circumstances influence crystallization in glassmaking, for example: (1) crystals nucleate and grow before the glass-forming melt occurs; (2) crystals grow or dissolve in flowing melt and during changing temperature; (3) crystals move under the influence of gravity; (4) crystals agglomerate and interact with gas bubbles; (5) high-level wastes (HLW) are mixtures of a large number of components in unusual proportions; (6) melter processing of HLW and the slow cooling of HLW glass in canisters provides an opportunity for a variety of crystalline forms to precipitate; (7) settling of crystals in a HLW glass melter may produce undesirable sludge at the melter bottom; and (8) crystallization of the glass product may increase, but also ruin chemical durability. The conclusions are: (1) crystal growth and dissolution typically proceed in a convective medium at changing temperature; (2) to represent crystallization or dissolution the kinetics must be expressed in the form of rate equations, such as dC/dt = f(C,T) and the temperature dependence of kinetic coefficients and equilibrium concentrations must be accounted for; and (3) non-equilibrium phenomena commonly occur - metastable crystallization, periodic distribution of crystals; and dendritic crystal growth.

KRUGER AA; HRMA PR

2009-08-19T23:59:59.000Z

442

Novel electrolyte additives to enhance zinc electrode cycle life  

DOE Green Energy (OSTI)

Electrochemical power sources that utilize zinc electrodes possess many advantages. Zinc is abundantly available, benign, inexpensive, stable over a wide operating temperature range, and has a high oxidation potential. In spite of these advantageous characteristics, rechargeable electrochemical systems based on zinc chemistry have not found widespread use. The major disadvantages of zinc electrodes are that they have limited cycle life due to zinc slumping and zinc electrode shape changes in alkaline solutions resulting from the solubility of zincate (Zn(OH){sub 4}{sup 2-}) in these solutions. As a result, premature cell failure often results due to cell shorting caused by dendritic growth as well as zinc slumping. In this paper we describe the chemical and physical characteristics of electrolyte solutions employing additives, particularly for zinc based electrochemical systems. These electrolytes are prepared using the alkali metal salts of 1,3,5-phenyltrisulfonic acid in combination with potassium hydroxide. The alkali metal salts of the acid possess good thermal stability, good ionic conductivity, and have a wide electrochemical voltage window in aqueous systems. With these electrolyte solutions improved cycle life was achieved in Zn/NiOOH and Zn/AgO. Improved cycle life with this additive is attributed to decreased zincate solubility, resulting in reduced zinc slumping and electrode shape changes. In addition, increased shelf-life and reduced self-discharge were also observed in many alkaline power sources.

Doddapaneni, N.; Ingersoll, D.

1995-11-01T23:59:59.000Z

443

Tribo-Mechanical Evaluations of Cobalt-Based (Stellite 4) Alloys Manufactured via HIPing and Casting  

E-Print Network (OSTI)

Abstract — Cobalt-based alloys are known for their excellent wear resistance, particularly under high temperature and corrosive environments. However the cast cobalt-based alloys have relatively high brittleness, and low toughness, due to their coarse carbide structure. This paper aims to comprehend if carbide refinement, caused by changing the processing route from sand casting to powder consolidated Hot Isostatic Pressing (HIPing), can improve the tribo-mechanical properties of cobalt-based alloys. The alloy selected for this investigation had a nominal wt. % composition of Co-30Cr-14W-1C, which is similar to the composition of the commercially available Stellite®4 alloy. The Hot Isostatic Pressed (HIPed) alloy had a much finer microstructure than the cast alloy, which showed a typical hypoeutectic dendritic microstructure. Both alloys had similar hardness. Although the cast alloy showed slightly better abrasive and sliding wear resistance than the HIPed alloy due to their coarser eutectic carbides, the HIPed alloy had a significant advantage on the impact toughness and contact fatigue performance. The results of this comparative investigation indicated that the HIPed alloy had an attractive combination of tribo-mechanical properties, i.e. improved impact and fatigue resistance, whilst preserving the high hardness and good wear resistance associated with the cast alloy, making it suitable for relatively higher stress applications.

H. Yu; R. Ahmed; H. De Villiers Lovelock; S. Davies

2007-01-01T23:59:59.000Z

444

Promotional Effects of Bismuth on the Formation of Platinum-Bismuth Nanowires Network and the Electrocatalytic Activity toward Ethanol Oxidation  

Science Conference Proceedings (OSTI)

Electrocatalytic activities of Pt and their alloys toward small organic molecules oxidation are highly dependent on their morphology, chemical composition, and electronic structure. Here, we report the synthesis of dendrite-like Pt{sub 95}Bi{sub 5}, Pt{sub 83}Bi{sub 17}, and Pt{sub 76}Bi{sub 24} nanowires network with a high aspect ratio (up to 68). The electronic structure and heterogeneous crystalline structure have been studied using combined techniques, including aberration-corrected scanning transmission electron microscopy (STEM) and X-ray absorption near-edge structure (XANES) spectroscopy. Bismuth-oriented attachment growth mechanism has been proposed for the anisotropic growth of Pt/Bi. The electrochemical activities of Pt/Bi nanowires network toward ethanol oxidations have been tested. In particular, the as-made Pt{sub 95}Bi{sub 5} appears to have superior activity toward ethanol oxidation in comparison with the commercial Pt/C catalyst. The reported promotional effect of Bi on the formation of Pt/Bi and electrochemical activities will be important to design effective catalysts for ethanol fuel cell application.

X Teng; W Du; D Su; Q Wang; A Frenkel

2011-12-31T23:59:59.000Z

445

Silicon materials task of the low cost solar array project (Part 2). Fourth quarterly report, July 1, 1976--September 30, 1976  

DOE Green Energy (OSTI)

During this quarter we have completed the growth of all contract-required Czochralski and silicon dendritic web crystals. The chemical analysis of all the Czochralski ingots is also finished. Preliminary mass spectroscopic evaluation of metal-doped web samples grown at 1.3 cm/min indicates that the effective distribution coefficients for Cu, Ni, and Cr all increase with growth rate as anticipated. For chromium the increase is almost 100 fold compared to the effective k for Czochralski ingots grown at 7.5 cm/hr. PCD lifetime measurements were completed on 46 ingots. The correlation between solar cell performance and PCD lifetime appears valid for all processed wafers except those containing Ti which give lower cell efficiency than would be predicted on the basis of lifetime alone. Solar cell measurements were completed in all but a few of the ingots grown during the contract. In particular, data has now been obtained on the second set of multiply-doped samples containing the impurity combinations Zr/Ti, Cr/Ni, and Cr/Cu/Ni. As in the case of ingots containing only Ti, the Zr/Ti sample shows severely degraded cell efficiency, only about 26% of the baseline. The Cr/Ni and Cr/Cu/Ni samples show efficiencies of 81 and 72% of baseline efficiency reflecting the small effects of Cu and Ni on cell performance and the stronger effect of Cr.

Hopkins, R.H.; Davis, J.R.; Rai-Choudhury, P.; Blais, P.D.; McHugh, J.P.; McCormick, J.R.

1976-01-01T23:59:59.000Z

446

Hummingbirds  

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

Hummingbirds Hummingbirds Nature Bulletin Mo. 347-A May 31, 1969 Forest Preserve District of Cook County George W. Dunne, President Roland F. Eisenbeis, Supt. of Conservation HUMMINBIRDS Hummingbirds, found only in the Western Hemisphere, are undoubtedly the most remarkable birds in the world. They are not only unique for their brilliant iridescent plumage, manner of flying and way of feeding, but also for their great variation in size, form, color, habits and other attributes. Many species are midgets no larger than bumblebee, weighing no more than a dime, but the largest is about the size of a chimney swift -- to which they are distantly related. One species has a bill only one-quarter inch in length, while that of another is almost five inches long -- greater than the combined length of its head, neck, body and tail. The bill is usually straight or nearly so, awl-shaped and needle-pointed, but in one species it curves downward like a sickle and in a few others it curves upward. The wings and tail are equally variable.

447

Paper Bags  

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

Paper Bags Paper Bags Nature Bulletin No. 438-A December 18, 1971 Forest Preserve District of Cook County George W. Dunne, President Roland F. Eisenbeis, Supt. of Conservation PAPER BAGS Paper bags may strike you as a peculiar topic for a Christmas bulletin. In previous years we chose reindeer, turkeys, holly, mistletoe, and other appropriate subjects. But paper bags also have a part in your celebration of Christmas: the ingredients for your dinner, many of them packaged in bags, come from the stores in grocery bags or shopping bags of heavy paper. Further, the patent for the first machine to make them was issued in 1852 to a 35-year-old schoolmaster, named Francis Wolle, in Bethlehem, Pennsylvania . Bethlehem is a big town now, famous for its steel mills, but a hundred years ago it was a hamlet settled by devout Moravians of German origin. In those days there were "general stores" that sold groceries, meats, hardware, harness, clothing and "notions" such as pins, needles, thread, ribbons and buttons. Everything came to them in bulk -- barrels, keys, cloth sacks, and crates. Doling out small quantities to customers was a vexing problem. Some people came with baskets, or with "tote bags" of jute; others begged for a sheet of brown wrapping paper but paper was scarce. Even newspapers were scarce.

448

Enviro Energy Enterprises | Open Energy Information  

Open Energy Info (EERE)

Enviro Energy Enterprises Enviro Energy Enterprises Jump to: navigation, search Name Enviro Energy Enterprises Address 287, Satya Niketan, New Delhi, India Place New Delhi, India Zip 110021 Sector Bioenergy Product Leading supplier of Biomass Briquetted Fuel, Pine Needles Briquettes, Saw Dust Briquettes, Mustard Husk Briquettes, Groundnut shell Briquettes Year founded 2005 Phone number 9310090827 Website http://www.indiamart.com/envir Coordinates 28.587723°, 77.1688269° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":28.587723,"lon":77.1688269,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

449

Minimally Invasive Magnetic Resonance Imaging-Guided Free-Hand Aspiration of Symptomatic Nerve Route Compressing Lumbosacral Cysts Using a 1.0-Tesla Open Magnetic Resonance Imaging System  

SciTech Connect

Purpose: To evaluate the feasibility of minimally invasive magnetic resonance imaging (MRI)-guided free-hand aspiration of symptomatic nerve route compressing lumbosacral cysts in a 1.0-Tesla (T) open MRI system using a tailored interactive sequence. Materials and Methods: Eleven patients with MRI-evident symptomatic cysts in the lumbosacral region and possible nerve route compressing character were referred to a 1.0-T open MRI system. For MRI interventional cyst aspiration, an interactive sequence was used, allowing for near real-time position validation of the needle in any desired three-dimensional plane. Results: Seven of 11 cysts in the lumbosacral region were successfully aspirated (average 10.1 mm [SD {+-} 1.9]). After successful cyst aspiration, each patient reported speedy relief of initial symptoms. Average cyst size was 9.6 mm ({+-}2.6 mm). Four cysts (8.8 {+-} 3.8 mm) could not be aspirated. Conclusion: Open MRI systems with tailored interactive sequences have great potential for cyst aspiration in the lumbosacral region. The authors perceive major advantages of the MR-guided cyst aspiration in its minimally invasive character compared to direct and open surgical options along with consecutive less trauma, less stress, and also less side-effects for the patient.

Bucourt, Maximilian de, E-mail: mdb@charite.de; Streitparth, Florian, E-mail: florian.streitparth@charite.de; Collettini, Federico [Charite-University Medicine, Department of Radiology (Germany); Guettler, Felix [Jena University, Department of Radiology (Germany); Rathke, Hendrik; Lorenz, Britta; Rump, Jens; Hamm, Bernd [Charite-University Medicine, Department of Radiology (Germany); Teichgraeber, U. K. [Jena University, Department of Radiology (Germany)

2012-02-15T23:59:59.000Z

450

Development of a rapid and efficient microinjection technique for gene insertion into fertilized salmonid eggs  

DOE Green Energy (OSTI)

An efficient one-step injection technique for gene insertion into fertilized rainbow trout (Oncorhynchus mykiss) eggs is described, and basic parameters affecting egg survival are reported. Freshly fertilized rainbow trout eggs were injected in the perivitelline space with a recombinant mouse metallothionein-genomic bovine growth hormone (bGH) DNA construct using a 30-gauge hypodermic needle and a standard microinjection system. Relative to control, site of injection and DNA concentration did not affect the egg survival, but injections later than 3--4 hours post fertilization were detrimental. The injection technique permitted treatment of 100 eggs/hr with survivals up to 100%, resulting in a 4% DNA uptake rate as indicated by DNA dot blot analysis. Positive dot blot results also indicated that the injected DNA is able to cross the vitelline membrane and persist for 50--60 days post hatching, obviating the need for direct injection into the germinal disk. Results are consistent with previous transgenic fish work, underscoring the usefulness of the technique for generating transgenic trout and salmonids. 24 refs., 6 figs., 3 tabs.

Chandler, D.P.; Welt, M.; Leung, F.C.

1990-10-01T23:59:59.000Z

451

Evaluation of approaches to estimating aboveground biomass in southern pine forests using SIR-C data  

SciTech Connect

Estimation of forest biomass on a global basis is a key issue in studies of ecology and biogeochemical cycling. Forests are a terrestrial sink of atmospheric carbon dioxide and play a central role in regulating the exchange of this important greenhouse gas between the atmosphere and the biosphere. A study was performed to evaluate various techniques for estimating aboveground, woody plant biomass in pine stands found in the southeastern United States, using C- and L- band multiple polarization radar imagery collected by the Shuttle Imaging Radar-C (SIR-C) system. The biomass levels present in the test stands ranged between 0.0 and 44.5 kg m{sup {minus}2}. Two SIR-C data sets were used one collected in April, 1994, when the soil conditions were very wet and the canopy was slightly wet from dew and a second collected in October, 1994, when the soils and canopy were dry. During the October mission, pine needles were completely flushed and the foliar biomass was twice as great in the forest stands as in April. Four methods were evaluated to estimate total biomass: one including a straight multiple linear correlation between total biomass and the various SIR-C channels, another including a ratio of the L-band HV/C-band HV channels; and two others requiring multiple steps, where linear regression equations for different stand components were used as the basis for estimating total biomass.

Harrell, P.A.; Haney, E.M.; Christensen, N.L. Jr. [Duke Univ., Durham, NC (United States). School of the Environment; Kasischke, E.S.; Bourgeau-Chavez, L.L. [Environmental Research of Michigan, Ann Arbor, MI (United States). Center for Earth Sciences

1997-02-01T23:59:59.000Z

452

SRS - Environmental Report for 2004  

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

4 4 Environmental Report - 2004 Environmental Data - 2004 Soil & Groundwater Closure Solid Waste SREL High-Level Waste Site D&D Forestry Maps SRS Search SRS pine cone The Longleaf Pine The longleaf pine (pinus palustris) is one of the dominant pine species at SRS. Distributed in the Atlantic and Gulf coastal plains from Virginia to Texas, the trees are common in dry, sandy locations. At maturity, they generally reach 80-120 feet in height and up to two-and-a-half feet in diameter (with a maximum height of 150 feet and diameter of four feet). They produce cones up to 10 inches long. The longleaf is the preferred pine species of the endangered red-cockaded woodpecker, and large areas of SRS are managed for the species because of the woodpecker. The trees are harvested for timber, and their pine straw (from needles reaching 15 inches in length) is used extensively in landscaping projects. The 2004 SRS Environmental Report's interactive CD and associated web page were designed by Don Lechner and the report cover by Eleanor Justice-both of the Westinghouse Savannah River Company's Documentation and Information Services Section - Media Documentation Group. The photograph was taken by Al Mamatey of the company's Environmental Services Section.

453

Aphids  

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

Aphids Aphids Nature Bulletin No. 421-A May 29, 1971 Forest Preserve District of Cook County George W. Dunne, President Roland F Eisenbeis, Supt. of Conservation APHIDS Aphids, or Plant Lice, are tiny defenseless insects that have soft bodies but needle-like beaks with which they puncture plants and suck the sap. They weaken or even kill many plants and also may infect them with virus, bacterial or fungus diseases. Aphids, unless controlled, multiply enormously and cause serious damage in orchards, vineyards, truck farms, gardens greenhouses, and field crops such as corn, cotton, small grains, clover and alfalfa. There are hundreds of species of aphids distributed over the world and there is scarcely a kind of plant, wild or cultivated, that is not infested by one or more kinds of plant lice. Some feed on stems and leaves, some on the roots, and some on both. Others feed on buds, and a few -- like the Hickory Aphid which infests hickory, maple and other forest trees -- feed on bark underneath the limbs. The hickory aphid is about one-quarter of an inch long, and one of the largest, but most kinds are about the size of a pinhead: less than one-twentieth of an inch in length. Most species are green but many are pink, white, brown or blackish. The woolly aphids, which feed on apple, pear, hawthorn and elm trees, are reddish or purplish but cover themselves with a cottony white secretion of wax.

454

Two-phase flow visualization and relative permeability measurement in transparent replicas of rough-walled rock fractures  

DOE Green Energy (OSTI)

Understanding and quantifying multi-phase flow in fractures is important for mathematical and numerical simulation of geothermal reservoirs, nuclear waste repositories, and petroleum reservoirs. While the cubic law for single-phase flow has been well established for parallel-plate fractures theoretically and experimentally, no reliable measurements of multi-phase flow in fractures have been reported. This work reports the design and fabrication of an apparatus for visualization of two-phase flow and for measurement of gas-liquid relative permeability in realistic rough-walled rock fractures. A transparent replica of a natural rock fracture from a core specimen is fabricated by molding and casting in clear epoxy. Simultaneous flow of gas and liquid with control of capillary pressure at inlet and outlet is achieved with the Hassler sandwich'' design: liquid is injected to the fracture through a porous block, while gas is injected directly to the edge of the fracture through channels in the porous block. A similar arrangement maintains capillary separation of the two phases at the outlet. Pressure drops in each phase across the fracture, and capillary pressures at the inlet and outlet, are controlled by means of pumps and needle valves, and are measured by differential and absolute pressure transducers. The clear epoxy cast of the natural fracture preserves the geometry of the fracture and permits visual observation of phase distributions. The fracture aperture distribution can be estimated by filling the fracture with a dyed liquid, and making pointwise measurements of the intensity of transmitted light.

Persoff, P.; Pruess, K.; Myer, L.

1991-01-01T23:59:59.000Z

455

Pentek metal coating removal system: Baseline report; Greenbook (chapter)  

SciTech Connect

The Pentek coating removal technology was tested and is being evaluated at Florida International University (FIU) as a baseline technology. In conjunction with FIU`s evaluation of efficiency and cost, this report covers evaluation conducted for safety and health issues. It is a commercially available technology and has been used for various projects at locations throughout the country. The Pentek coating removal system consisted of the ROTO-PEEN Scaler, CORNER-CUTTER{reg_sign}, and VAC-PAC{reg_sign}. They are designed to remove coatings from steel, concrete, brick, and wood. The Scaler uses 3M Roto Peen tungsten carbide cutters while the CORNER-CUTTER{reg_sign} uses solid needles for descaling activities. These hand tools are used with the VAC-PAC{reg_sign} vacuum system to capture dust and debris as removal of the coating takes place. The safety and health evaluation during the testing demonstration focused on two main areas of exposure: dust and noise. Dust exposure minimal, but noise exposure was significant. Further testing for each exposure is recommended because of the environment where the testing demonstration took place. It is feasible that the dust and noise levels will be higher in an enclosed operating environment of different construction. In addition, other areas of concern found were arm-hand vibration, whole-body, ergonomics, heat stress, tripping hazards, electrical hazards, machine guarding, and lockout/tagout.

1997-07-31T23:59:59.000Z

456

Pentek metal coating removal system: Baseline report  

SciTech Connect

The Pentek coating removal technology was tested and is being evaluated at Florida International University (FIU) as a baseline technology. In conjunction with FIU`s evaluation of efficiency and cost, this report covers evaluation conducted for safety and health issues. It is a commercially available technology and has been used for various projects at locations throughout the country. The Pentek coating removal system consisted of the ROTO-PEEN Scaler, CORNER-CUTTER{reg_sign}, and VAC-PAC{reg_sign}. They are designed to remove coatings from steel, concrete, brick, and wood. The Scaler uses 3M Roto Peen tungsten carbide cutters while the CORNER-CUTTER{reg_sign} uses solid needles for descaling activities. These hand tools are used with the VAC-PAC{reg_sign} vacuum system to capture dust and debris as removal of the coating takes place. The safety and health evaluation during the testing demonstration focused on two main areas of exposure: dust and noise. Dust exposure minimal, but noise exposure was significant. Further testing for each exposure is recommended because of the environment where the testing demonstration took place. It is feasible that the dust and noise levels will be higher in an enclosed operating environment of different construction. In addition, other areas of concern found were arm-hand vibration, whole-body, ergonomics, heat stress, tripping hazards, electrical hazards, machine guarding, and lockout/tagout.

1997-07-31T23:59:59.000Z

457

Effects of calcium magnesium acetate on the combustion of coal-water slurries. Thirteenth Quarterly project status report, 1 September 1992--30 November 1992  

SciTech Connect

Production of CWF agglomerates of pulverized coal grind has commenced. A bituminous coal PSOC 1451 HVA coal has been obtained from the Penn State Coal Sample Bank, size classified in the 38-45{mu}m range. This coal was mixed with water (40 % solids) and with 1% ammonium lignosulfonate as a dispersant. Generation of pre-dried CWF agglomerates has been conducted in a thermal reactor, as described at an earlier report. The solenoid actuator-driven single drop generator is used fitted with different size needle-plunger combinations. During the present, 14th quarter, the following tasks are being conducted: (a) Measure the gas temperature profiles in the new furnace and recalibrate the pyrometer. (b) Generate an inventory of CWF agglomerates of different coal grinds and carbon black with and without CMA. (c) Conduct high temperature experiments to identify differences in the combustion behavior of agglomerates of different coal grinds, and (d) efforts will be conducted to capture the resulting ash particles for visual observations.

Levendis, Y.A.

1992-12-31T23:59:59.000Z

458

Surgical implantation techniques for electronic tags in fish  

Science Conference Proceedings (OSTI)

Intracoelomic implantation of transmitters into fish requires making a surgical incision, incision closure, and other surgery related techniques; however, the tools and techniques used in the surgical process vary widely. We review the available literature and focus on tools and techniques used for conducting surgery on juvenile salmonids because of the large amount of research that is conducted on them. The use of sterilized surgical instruments properly selected for a given size of fish will minimize tissue damage and infection rates, and speed the wound healing of fish implanted with transmitters. For the implantation of transmitters into small fish, the optimal surgical methods include making an incision on the ventral midline along the linea alba (for studies under 1 month), protecting the viscera (by lifting the skin with forceps while creating the incision), and using absorbable monofilament suture with a small-swaged-on swaged-on tapered or reverse-cutting needle. Standardizing the implantation techniques to be used in a study involving particular species and age classes of fish will improve survival and transmitter retention while allowing for comparisons to be made among studies and across multiple years. This review should be useful for researchers working on juvenile salmonids and other sizes and species of fish.

Wagner, Glenn N.; Cooke, Steven J.; Brown, Richard S.; Deters, Katherine A.

2011-01-01T23:59:59.000Z

459

Design Parameters of a Miniaturized Piezoelectric Underwater Acoustic Transmitter  

Science Conference Proceedings (OSTI)

The Juvenile Salmon Acoustic Telemetry System (JSATS) project supported by the U.S. Army Corps of Engineers, Portland District, has yielded the smallest acoustic fish tag transmitter commercially available to date. In order to study even smaller fish populations and make the transmitter injectable by needles, the JSATS acoustic micro transmitter needs to be further downsized. As part of the transmitter downsizing effort some of the design parameters of the lead zirconate titanate (PZT) ceramic tube transducer in the transmitter were studied, including the type of PZT, the backing material, the necessary drive voltage, the transmitting bandwidth and the length of the transducer. It was found that, to satisfy the 156-dB source level requirement of JSATS, a square wave with a 10-volt amplitude is required to drive 'soft' PZT transducers. PZT-5H demonstrated the best source level performance. For Navy types I and II, 16 volts or 18 volts were needed. Ethylene-propylene-diene monomer (EPDM) closed-cell foam was found to be the backing material providing the highest source level. The effect of tube length on the source level is also demonstrated in this paper, providing quantitative information for downsizing of small piezoelectric transmitters.

Li, Huidong; Deng, Zhiqun; Yuan, Yong; Carlson, Thomas J.

2012-07-02T23:59:59.000Z

460

Discontinuous phase formation and selective attack of SiC materials exposed to low oxygen partial pressure environments  

DOE Green Energy (OSTI)

Three SiC materials were exposed to gas mixtures containing N{sub 2}, H{sub 2}, and CO at 1000-1300C, 1-740 torr for a few to 1000 h. Kinetic and thermodynamic studies indicate that CO is the predominant oxidizing species. A variety of corrosion processes were observed, including surface and internal pit formation, needle growth, grain boundary attack, and attack of impurities and surrounding material. In the case of a siliconized SiC, impurities such as Ca, Al, and Fe diffused rapidly through the Si matrix forming complex calcium aluminosilicates on the surface, leaving behind internal voids. Evaluation of the mechanical properties, including fractography, revealed a variety of degradative phenomena. Efforts to identify causes of pit formation suggested that the overall process was complex. Pits formed during attack of grain boundaries and regions containing transition metal impurities. Studies of single crystals showed preferential attack near impurities and crystalline defects, indicating that damaged crystals or certain crystal orientations in the polycrystalline materials are susceptible to attack. In addition, under some conditions where pit formation was observed, the strength of certain materials increased apparently due to flaw healing. It is suggested that flaws can heal in the absence of mechanical stress due to their high surface energy. However, second phases observed within partially healed surface cracks suggest impurities also contribute to the flaw healing processes.

Butt, D.P. [Los Alamos National Lab., NM (United States); Tressler, R.E.; Spear, K.E. [Pennsylvania State Univ., University Park, PA (United States). Dept. of Materials Science and Engineering

1993-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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.


461

Fluid sampling system  

DOE Patents (OSTI)

An fluid sampling system allows sampling of radioactive liquid without spillage. A feed tank is connected to a liquid transfer jet powered by a pumping chamber pressurized by compressed air. The liquid is pumped upwardly into a sampling jet of a venturi design having a lumen with an inlet, an outlet, a constricted middle portion, and a port located above the constricted middle portion. The liquid is passed under pressure through the constricted portion causing its velocity to increase and its pressure to decreased, thereby preventing liquid from escaping. A septum sealing the port can be pierced by a two pointed hollow needle leading into a sample bottle also sealed by a pierceable septum affixed to one end. The bottle is evacuated by flow through the sample jet, cyclic variation in the sampler jet pressure periodically leaves the evacuated bottle with lower pressure than that of the port, thus causing solution to pass into the bottle. The remaining solution in the system is returned to the feed tank via a holding tank.

Houck, Edward D. (Idaho Falls, ID)

1994-01-01T23:59:59.000Z

462

FILM GROWTH ON ALUMINUM IN HIGH-TEMPERATURE WATER  

DOE Green Energy (OSTI)

Film growths on aluminum and two aluminum-1 wt.% nickel alloys in water at 250 and 350 deg C were studied. It was found that oxide growth does not advance on a uniform front but, to the contrary, the advancing surface contains many outcrops in the form of thin platelets, chunky outcrops, and whiskers. With both the pure metal and the alloys considerable intergranular attack was observed. The general corrosion product was usually more uniform in crystal size when formed on the pure metal, but variations in crystal size were observed on both aluminum and alloys with varying features of the metal surface. The roughness of the general oxide surface (includlng outcrops) was found to increase rapidly to about 0.2 micron and then remain relatively constant with increasing film thickness. The composition of films formed under all investigated conditions, except one, was found to be boehmite ( alpha -Al/sub 2/O/sub 3/- H/sub 2/O). This exception was films carried by the alloy specimens after testing for 32 days at 350 deg C. In this case the main corrosion film was still boehmite, but in addition the outer surface supported long needles of diaspore ( beta -Al/sub 2/ O/sub 3/- H/sub 2/O). (auth)

Hart, R.K.; Ruther, W.E.

1961-04-01T23:59:59.000Z

463

Measurement of biodiesel blend and conventional diesel spray structure using x-ray radiography.  

DOE Green Energy (OSTI)

The near-nozzle structure of several nonevaporating biodiesel-blend sprays has been studied using X-ray radiography. Radiography allows quantitative measurements of the fuel distribution in sprays to be made with high temporal and spatial resolution. Measurements have been made at different values of injection pressure, ambient density, and with two different nozzle geometries to understand the influences of these parameters on the spray structure of the biodiesel blend. These measurements have been compared with corresponding measurements of Viscor, a diesel calibration fluid, to demonstrate the fuel effects on the spray structure. Generally, the biodiesel-blend spray has a similar structure to the spray of Viscor. For the nonhydroground nozzle used in this study, the biodiesel-blend spray has a slightly slower penetration into the ambient gas than the Viscor spray. The cone angle of the biodiesel-blend spray is generally smaller than that of the Viscor spray, indicating that the biodiesel-blend spray is denser than the Viscor spray. For the hydroground nozzle, both fuels produce sprays with initially wide cone angles that transition to narrow sprays during the steady-state portion of the injection event. These variations in cone angle with time occur later for the biodiesel-blend spray than for the Viscor spray, indicating that the dynamics of the injector needle as it opens are somewhat different for the two fuels.

Kastengren, A. L.; Powell, C. F.; Wang, Y. J.; IM, K. S.; Wang, J.

2009-11-01T23:59:59.000Z

464

Preliminary Results of Fractionated Stereotactic Radiotherapy After Cyst Drainage for Craniopharyngioma in Adults  

SciTech Connect

Purpose: To retrospectively evaluate the effectiveness of fractionated stereotactic radiotherapy (FSRT) for craniopharyngioma. Methods and Materials: Between 1999 and 2005, 16 patients with craniopharyngioma were referred to Tokyo Medical University Hospital. They received FSRT alone after histologic confirmation by needle biopsy and underwent cyst drainage via endoscopy. The median prescription dose fraction was 30 Gy in six fractions. All patients except 1 were followed up until December 2009 or death. Results: The median follow-up period was 52 months (range, 4-117 months). Of the 17 patients, 3 experienced recurrence 4 to 71 months after FSRT. The 3-year local control rate was 82.4%. One patient died of thyroid cancer, and the 3-year survival rate was 94.1%. Eight patients had improved visual fields at a median of 2.5 months after FSRT, but hormonal functions did not improve in any patient. Conclusions: FSRT after cyst drainage seems to be safe and effective for patients with craniopharyngiomas, and it may be a safe alternative to surgery.

Kanesaka, Naoto, E-mail: kaneka@tokyo-med.ac.jp [Department of Radiology, Tokyo Medical University Hospital, Tokyo (Japan); Mikami, Ryuji; Nakayama, Hidetsugu; Nogi, Sachika; Tajima, Yu [Department of Radiology, Tokyo Medical University Hospital, Tokyo (Japan); Nakajima, Nobuyuki; Wada, Jun; Miki, Tamotsu; Haraoka, Jou [Department of Neurosurgery, Tokyo Medical University Hospital, Tokyo (Japan); Okubo, Mitsuru [Department of Radiology, Tokyo Medical University Hachioji Medical Center, Tokyo (Japan); Sugahara, Shinji [Department of Radiology, Tokyo Medical University Ibaraki Medical Center, Tokyo (Japan); Tokuuye, Koichi [Department of Radiology, Tokyo Medical University Hospital, Tokyo (Japan)

2012-03-15T23:59:59.000Z

465

Towards the photoreduction of CO{sub 2} with Ni(bpy){sub n}{sup 2+} complexes  

DOE Green Energy (OSTI)

When an acetonitrile solution containing Ni(bpy){sub 3}{sup 2+}, trithylamine and CO{sub 2} is irradiated at 313 nm, CO is produced with a quantum yield {approximately} 0.1% (defined as CO produced/photons absorbed). Flash photolysis, electrochemistry, and pulse radiolysis experiments provide evidence for the formation of Ni{sup I}(bpy){sub 2+}, as an intermediate, in the photochemical Ni(bpy){sub 3}{sup 2+}/TEA/CO{sub 2} system. Although Ni{sup 0}(bpy){sub 2} does react with CO{sub 2}, Ni{sup I}(bpy){sub 2+} seems unreactive toward CO{sub 2} addition. The x-ray structure of [Ni{sub 3}(bpy){sub 6}](ClO{sub 4}), which crystallize as blue-violet needles, reveals the existence of a dimer in the solid. UV-vis spectra also indicate that reduced Ni(bpy){sub 3}{sup 2+} solutions contain Ni{sup I}(bpy){sub 2+}, Ni{sup 0}(bpy){sub 2} and [Ni(bpy){sub 2}]{sub 2} complexes in equilibrium.

Mori, Y.; Szalda, D.J.; Brunschwig, B.S.; Schwarz, H.A.; Fujita, E.

1995-08-01T23:59:59.000Z

466

Fluid sampling system  

DOE Patents (OSTI)

This invention comprises a fluid sampling system which allows sampling of radioactive liquid without spillage. A feed tank is connected to a liquid transfer jet powered by a pumping chamber pressurized by compressed air. The liquid is pumped up into a sampling jet of venturi design having a lumen with an inlet, an outlet, a constricted middle portion, and a port located above the constricted middle portion. The liquid is passed under pressure through the constricted portion causing its velocity to increase and its pressure to decrease, thereby preventing liquid from escaping. A septum sealing the port can be pierced by a two pointed hollow needle leading into a sample bottle also sealed by a pierceable septum affixed to one end. The bottle is evacuated by flow through the sample jet, cyclic variation in the sampler jet pressure periodicially leaves the evacuated bottle with lower pressure than that of the port, thus causing solution to pass into the bottle. The remaining solution in the system is returned to the feed tank via a holding tank.

Houck, E.D.

1993-12-31T23:59:59.000Z

467

Heat flow and microearthquake studies, Coso Geothermal Area, China Lake, California. Final report  

DOE Green Energy (OSTI)

The present research effort at the Coso Geothermal Area located on the China Lake Naval Weapons Center, China Lake, California, was concerned with: (1) heat flow studies and (2) microearthquake studies associated with the geothermal phenomena in the Coso Hot Springs area. The sites for ten heat flow boreholes were located primarily using the available seismic ground noise and electrical resistivity data. Difficulty was encountered in the drilling of all of the holes due to altered, porous, faulted, and sometime highly fractures zones. Thermal conductivity measurements were completed using both the needle probe technique and the divided bar apparatus with a cell arrangement. Heat flow values were obtaned by combining equilibrium temperature measurements with the appropriate thermal conductivity values. Heat, in the upper few hundred meters of the subsurface associated with the Coso Geothermal Area, is being transferred by a conductive heat transfer mechanism with a value of approximately 15 ..mu..cal/cm/sup 2/-sec. This is typical of geothermal systems throughout the world and is approximately ten times the normal terrestrial heat flow of 1.5 HFU. The background heat flow for the Coso region is about 3.5 HFU.

Combs, J.

1975-01-01T23:59:59.000Z

468

Production of jet fuel from coal-derived liquids  

DOE Green Energy (OSTI)

Amoco and Lummus Crest are evaluating the process options and economics for upgrading the naphtha, crude phenols, and tar oil by-products from the Great Plains Coal Gasification Plant to jet fuels and other salable products. Analytical characterizations of these three by-products indicate the range of products that can be manufactured from each, and potential problems which could be encountered during refining. These characterizations, along with limited experimental data and Amoco's proprietary process models, were used to design conceptual processing schemes for maximizing the production of Grades JP-4, JP-8, and high density (JP-8X) jet fuels from the by-product liquids. In addition to the maximum jet fuel schemes, conceptual designs have also been formulated for maximizing profits from refining of the Great Plains by-products. Conceptual processing schemes for profitable production of JP-4, JP-8, and JP-8X have been developed, as has a maximum profit'' case. All four of these additional cases have now been transferred to Lummus for design and integration studies. Development of these schemes required the use of linear programming technology. This technology includes not only conventional refining processes which have been adapted for use with coal-derived liquids (e.g. hydrotreating, hydrocracking), but also processes which may be uniquely suited to the Great Plains by-products such as cresylic acid extraction, hydordealkylation, and needle coking. 6 figs., 3 tabs.

Furlong, M.W.; Fox, J.D.; Masin, J.G.; Soderberg, D.J.

1987-01-01T23:59:59.000Z

469

A New Approach to a Lyme Disease Vaccine  

Science Conference Proceedings (OSTI)

A single recombinant outer surface protein A (OspA) antigen designed to contain protective elements from 2 different OspA serotypes (1 and 2) is able to induce antibody responses that protect mice against infection with either Borrelia burgdorferi sensu stricto (OspA serotype-1) or Borrelia afzelii (OspA serotype-2). Protection against infection with B burgdorferi ss strain ZS7 was demonstrated in a needle-challenge model. Protection against B. afzelii species was shown in a tick-challenge model using feral ticks. In both models, as little as .03 {micro}g of antigen, when administered in a 2-dose immunization schedule with aluminum hydroxide as adjuvant, was sufficient to provide complete protection against the species targeted. This proof of principle study proves that knowledge of protective epitopes can be used for the rational design of effective, genetically modified vaccines requiring fewer OspA antigens and suggests that this approach may facilitate the development of an OspA vaccine for global use.

Livey, I.; Dunn, J.; O'Rourke, M.; Traweger, A.; Savidis-Dacho, H.; Crowe, B. A.; Barrett, P. N.; Yang, X.; Luft, B. J.

2011-02-01T23:59:59.000Z

470

Crystallization kinetics and spectroscopic investigations on Tb{sup 3+} and Yb{sup 3+} codoped glass ceramics containing CaF{sub 2} nanocrystals  

SciTech Connect

Transparent Tb{sup 3+} and Yb{sup 3+} codoped oxyfluoride glass ceramics containing CaF{sub 2} nanocrystals were prepared by melt quenching and subsequent heat treatment. Crystallization kinetics of CaF{sub 2} nanocrystals was investigated by differential scanning calorimetric method. The average apparent activation energy E{sub a} of the crystallization was {approx}498 kJ/mol. Moreover, the value of the Avrami exponent n was 1.01. These results suggest that the crystallization mechanism of CaF{sub 2} is a diffusion controlled growth process of needles and plates of finite long dimensions. X-ray diffraction patterns and transmission electron microscopy image confirmed the CaF{sub 2} nanocrystals in the glass ceramic. Ultraviolet (UV) and visible emission spectra of the as-made glass and the glass ceramic with an excitation of a 974 nm laser diode were recorded at room temperature. An intense UV emission at 381 nm was observed in the glass ceramic. The origin of the enhancement of the emission at 381 nm was investigated using spectroscopic technique and Judd-Ofelt analysis. The enhancement of the emission at 381 nm could be attributed to the change of the ligand field of Tb{sup 3+} ions due to the incorporation of some Tb{sup 3+} and Yb{sup 3+} ions into CaF{sub 2} nanocrystals in the glass ceramic.

Huang Lihui; Qin Guanshi; Arai, Yusuke; Jose, Rajan; Suzuki, Takenobu; Ohishi, Yasutake; Yamashita, Tatsuya; Akimoto, Yusuke [Research Center for Advanced Photon Technology, Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-ku, Nagoya 468-8511 (Japan); Research Center for Advanced Photon Technology, Toyota Technological Institute, 2-12-1 Hisakata, Tempaku-ku, Nagoya 468-8511, Japan and Toyota Central R and D Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi, 480-1192 (Japan); Toyota Central R and D Labs., Inc., 41-1 Yokomichi, Nagakute, Aichi, 480-1192 (Japan)

2007-11-01T23:59:59.000Z

471

Coherent femtosecond low-energy single-electron pulses for time-resolved diffraction and imaging: A numerical study  

Science Conference Proceedings (OSTI)

We numerically investigate the properties of coherent femtosecond single electron wave packets photoemitted from nanotips in view of their application in ultrafast electron diffraction and non-destructive imaging with low-energy electrons. For two different geometries, we analyze the temporal and spatial broadening during propagation from the needle emitter to an anode, identifying the experimental parameters and challenges for realizing femtosecond time resolution. The simple tip-anode geometry is most versatile and allows for electron pulses of several ten of femtosecond duration using a very compact experimental design, however, providing very limited control over the electron beam collimation. A more sophisticated geometry comprising a suppressor-extractor electrostatic unit and a lens, similar to typical field emission electron microscope optics, is also investigated, allowing full control over the beam parameters. Using such a design, we find {approx}230 fs pulses feasible in a focused electron beam. The main limitation to achieve sub-hundred femtosecond time resolution is the typical size of such a device, and we suggest the implementation of more compact electron optics for optimal performance.

Paarmann, A.; Mueller, M.; Ernstorfer, R. [Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany); Gulde, M.; Schaefer, S.; Schweda, S.; Maiti, M.; Ropers, C. [Courant Research Center Physics and Material Physics Institute, University of Goettingen, Friedrich-Hund-Platz 1, 37077 Goettingen (Germany); Xu, C. [Fritz-Haber-Institut der Max-Planck-Gesellschaft, Faradayweg 4-6, 14195 Berlin (Germany); Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Science, 390, Qinghe Road, Jiading, Shanghai 201800 (China); Hohage, T. [Institute of Numerical and Applied Mathematics, University of Goettingen, Lotzestr. 16-18, 37083 Goettingen (Germany); Schenk, F. [Courant Research Center Physics and Material Physics Institute, University of Goettingen, Friedrich-Hund-Platz 1, 37077 Goettingen (Germany); Institute of Numerical and Applied Mathematics, University of Goettingen, Lotzestr. 16-18, 37083 Goettingen (Germany)

2012-12-01T23:59:59.000Z

472

Magnetic lens apparatus for use in high-resolution scanning electron microscopes and lithographic processes  

DOE Patents (OSTI)

Disclosed are lens apparatus in which a beam of charged particlesis brought to a focus by means of a magnetic field, the lens being situated behind the target position. In illustrative embodiments, a lens apparatus is employed in a scanning electron microscopeas the sole lens for high-resolution focusing of an electron beam, and in particular, an electron beam having an accelerating voltage of from about 10 to about 30,000 V. In one embodiment, the lens apparatus comprises an electrically-conducting coil arranged around the axis of the beam and a magnetic pole piece extending along the axis of the beam at least within the space surrounded by the coil. In other embodiments, the lens apparatus comprises a magnetic dipole or virtual magnetic monopole fabricated from a variety of materials, including permanent magnets, superconducting coils, and magnetizable spheres and needles contained within an energy-conducting coil. Multiple-array lens apparatus are also disclosed for simultaneous and/or consecutive imaging of multiple images on single or multiple specimens. The invention further provides apparatus, methods, and devices useful in focusing charged particle beams for lithographic processes.

Crewe, Albert V. (Dune Acres, IN)

2000-01-01T23:59:59.000Z

473

Characterization of coal-water slurry fuel sprays generated by an electronically-controlled accumulator fuel injector  

E-Print Network (OSTI)

Experiments have been completed to characterize coal-water slurry sprays generated by an electronically-controlled accumulator fuel injection system for a diesel engine. The sprays were injected into a pressurized chamber equipped with quartz windows. High speed movies, detailed data for fuel line pressures and needle lift signals were obtained as a function of time, orifice diameter, coal loading, gas density in the chamber, and accumulator fuel pressure. For the base case conditions (50% by mass) coal loading, 0.4 mm diameter nozzle hole, coal-water slurry pressure of 82 MPa (12,000 psi), and a chamber density of 25 kg/m'), the break-up time was 0.30 msec. An empirical correlation for both spray tip penetration and initial jet velocity was developed. For the base case conditions, the spray tip penetration and initial jet velocity were 15% greater for coal water slurry than for diesel fuel or water. Results of this research and the correlation are specific to the tested coal-water slurry.

Payne, Stephen Ellis

1993-01-01T23:59:59.000Z

474

Electrochemical hydrogen storage in LaNi{sub 4.25}Al{sub 0.75} alloys: A comparative study between film and powder materials  

Science Conference Proceedings (OSTI)

A comparison is made of the electrochemical and structural properties of LaNi{sub 4.25}Al{sub 0.75} alloys in thin film and powder forms. X-ray diffraction (XRD) revealed that both the LaNi{sub 4.25}Al{sub 0.75} thin film and powder materials are crystalline. Atomic force microscopy (AFM) and focused ion beam microscopy (FIB) proved that the film appeared to have a hill-like surface morphology, but was rather dense with a thickness of about 4.2 {mu}m. Simulated battery tests indicate that both exhibit similar electrochemical behavior, possibly due to their crystal structure, as it requires a primary activation to reach its fully active state. However it took a longer activation period for the film to be activated; an apparent initial decrease of charging voltage with cycle number was observed, as were abnormal discharge processes during activation. After 30 charge/discharge cycles, small needle-shaped aluminium oxide particles were formed on both the powder and film surfaces.

Wang, Z.M. [Center of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi, 541004 (China)], E-mail: zmwang@guet.edu.cn; Li, Chi Ying Vanessa [School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052 (Australia); Zhou Huaiying [Center of Material Science and Engineering, Guilin University of Electronic Technology, Guilin, Guangxi, 541004 (China); Liu Shi [Institute of Metal Research, Chinese Academy of Sciences (China); Chan, S.L.I. [School of Materials Science and Engineering, University of New South Wales, Sydney, NSW 2052 (Australia)

2008-04-15T23:59:59.000Z

475

Tube wall thickness measurement apparatus  

DOE Patents (OSTI)

An apparatus for measuring the thickness of a tube's wall for the tube's entire length and circumference by determining the deviation of the tube wall thickness from the known thickness of a selected standard item. The apparatus comprises a base and a first support member having first and second ends. The first end is connected to the base and the second end is connected to a spherical element. A second support member is connected to the base and spaced apart from the first support member. A positioning element is connected to and movable relative to the second support member. An indicator is connected to the positioning element and is movable to a location proximate the spherical element. The indicator includes a contact ball for first contacting the selected standard item and holding it against the spherical element. The contact ball then contacts the tube when the tube is disposed about the spherical element. The indicator includes a dial having a rotatable needle for indicating the deviation of the tube wall thickness from the thickness of the selected standard item.

Lagasse, Paul R. (Santa Fe, NM)

1987-01-01T23:59:59.000Z

476

Tube wall thickness measurement apparatus  

DOE Patents (OSTI)

An apparatus for measuring the thickness of a tube's wall for the tube's entire length and radius by determining the deviation of the tube wall thickness from the known thickness of a selected standard item. The apparatus comprises a base and a first support member having first and second ends. The first end is connected to the base and the second end is connected to a spherical element. A second support member is connected to the base and spaced apart from the first support member. A positioning element is connected to and movable relative to the second support member. An indicator is connected to the positioning element and is movable to a location proximate the spherical element. The indicator includes a contact ball for first contacting the selected standard item and holding it against the spherical element. The contact ball then contacts the tube when the tube is disposed about the spherical element. The indicator includes a dial having a rotatable needle for indicating the deviation of the tube wall thickness from the thickness of the selected standard item.

Lagasse, P.R.

1985-06-21T23:59:59.000Z

477

Fluid sampling system  

DOE Patents (OSTI)

An fluid sampling system allows sampling of radioactive liquid without spillage. A feed tank is connected to a liquid transfer jet powered by a pumping chamber pressurized by compressed air. The liquid is pumped upwardly into a sampling jet of a venturi design having a lumen with an inlet, an outlet, a constricted middle portion, and a port located above the constricted middle portion. The liquid is passed under pressure through the constricted portion causing its velocity to increase and its pressure to be decreased, thereby preventing liquid from escaping. A septum sealing the port can be pierced by a two pointed hollow needle leading into a sample bottle also sealed by a pierceable septum affixed to one end. The bottle is evacuated by flow through the sample jet, cyclic variation in the sampler jet pressure periodically leaves the evacuated bottle with lower pressure than that of the port, thus causing solution to pass into the bottle. The remaining solution in the system is returned to the feed tank via a holding tank. 4 figs.

Houck, E.D.

1994-10-11T23:59:59.000Z

478

Method and apparatus for scientific analysis under low temperature vacuum conditions  

DOE Patents (OSTI)

A method and apparatus for scientific analysis of a sample under low temperature vacuum conditions uses a vacuum chamber with a conveyor belt disposed therein. One end of the conveyor belt is a cool end in thermal contact with the cold stage of a refrigerator, whereas the other end of the conveyor belt is a warm end spaced from the refrigerator. A septum allows injection of a sample into the vacuum chamber on top of the conveyor belt for spectroscopic or other analysis. The sample freezes on the conveyor belt at the cold end. One or more windows in the vacuum chamber housing allow spectroscopic analysis of the sample. Following the spectroscopic analysis, the conveyor belt may be moved such that the sample moves toward the warm end of the conveyor belt where upon it evaporates, thereby cleaning the conveyor belt. Instead of injecting the sample by way of a septum and use of a syringe and needle, the present device may be used in series with capillary-column gas chromatography or micro-bore high performance liquid chromatography.

Winefordner, James D. (Gainesville, FL); Jones, Bradley T. (Gainesville, FL)

1990-01-01T23:59:59.000Z

479

Coordinated train control and energy management control strategies  

DOE Green Energy (OSTI)

The Bay Area Rapid Transit (BART) system, in collaboration with Hughes Aircraft Company and Harmon Industries, as in the process of developing an Advanced Automatic Train Control (AATC) system to replace the current fixed-block automatic system. In the long run, the AATC system is expected to not only allow for safe short headway operation, but also to facilitate coordinated train control and energy management. This new system will employ spread spectrum radios, installed onboard trains, at wayside locations, and at control stations, to determine train locations and reliably transfer control information. Sandia National Laboratories has worked cooperatively with BART to develop a simulator of the train control and the power consumption of the AATC system. The authors are now in the process of developing enhanced train control algorithms to supplement the safety critical controller in order to smooth out train trajectories through coordinated control of multiple trains, and to reduce energy consumption and power infrastructure requirements. The control algorithms so far considered include (1) reducing peak power consumption to avoid voltage sags, especially during an outage or while clearing a backup, (2) rapid and smooth recovery from a backup, (3) avoiding oscillations due to train interference, (4) limiting needle peaks in power demand at substations to some specified level, (5) coasting, and (6) coordinating train movement, e.g., starts/stops and hills.

Gordon, S.P. [Sandia National Labs., Livermore, CA (United States); Lehrer, D.G. [Bay Area Rapid Transit District, Oakland, CA (United States)

1998-05-01T23:59:59.000Z

480

CT-Guided Fiducial Placement for CyberKnife Stereotactic Radiosurgery: An Initial Experience  

Science Conference Proceedings (OSTI)

CyberKnife frameless image-guided radiosurgery has become a widely used system for parenchymal extracranial lesions. Gold fiducials are required for the planning and aiming of CyberKnife therapy. We report our initial experience and describe the technique of positioning tumor markers, under CT guidance. We conducted a retrospective review of 105 patients who were referred for CyberKnife stereotactic radiosurgery at Iatropolis CyberKnife Center in Athens. All patients underwent percutaneous fiducial placement via CT guidance. At the desired location, the 18-G needle was advanced into or near the tumor. Data collected included number and locations of fiducials placed and complications experienced to date. One hundred five patients underwent fiducial placement under CT guidance and a total number of 319 gold seeds were implanted. We experienced one episode of pneumothorax that required drainage, one mild pneumothorax, and three episodes of perifocal pulmonary hemorrhage. In conclusion, fiducial implantation under CT guidance appears to be a safe and efficient procedure, as long as it is performed by an experienced interventional radiologist.

Sotiropoulou, Evangelia ['Sotiria' General Hospital of Chest Diseases (Greece); Stathochristopoulou, Irene [Iatropolis CyberKnife Center (Greece); Stathopoulos, Konstantinos ['Sotiria' General Hospital of Chest Diseases (Greece); Verigos, Kosmas; Salvaras, Nikolaos [Iatropolis CyberKnife Center (Greece); Thanos, Loukas, E-mail: loutharad@yahoo.co ['Sotiria' General Hospital of Chest Diseases (Greece)

2010-06-15T23:59:59.000Z

Note: This page contains sample records for the topic "dendrite lacy needle" 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.


481

A Study to Determine the Biological Feasability of a New Fish Tagging System : Annual Report, 1986-1987.  

DOE Green Energy (OSTI)

In 1983, a multi-year project to evaluate the technical and biological feasibility of adapting a new identification system to salmonids was established. The system is based upon a miniaturized passive integrated transponder (PIT) tag. This report discusses the work completed and is divided into laboratory studies, field studies, and systems development. All studies were conducted using a glass-encapsulated tag implanted into the body cavity of test fish via a 12-gauge hypodermic needle. Laboratory studies with juvenile chinook salmon, Oncorhynchus tshawytscha, showed that retention of glass-encapsulated PIT tags was 99-100% in fish weighing 3 g (mean weight) or larger. No adverse tissue response to the tag was noted. The survival of fish 5 g (mean weight) or larger was usually greater than 99%. However, fish ranging in weight from 2 to 4 g, or fish undergoing a physiological change such as smoltification may have a low mortality (usually less than 5.0%) after tagging. The mortality rate in the smaller fish was dependent upon tagging skill whereas mortality in smolting fish seemed dependent upon the level of stress. Growth comparisons between tagged and control fish indicated PIT-tagged fish had a slightly depressed growth rate at some measurement periods. The operational life of glass-encapsulated PIT tags implanted in fish was good, with 100% of the tags operating after 401 days. No tags were rejected from the fish during the observation period.

Prentice, Earl F.; Flagg, T.A.

1987-12-01T23:59:59.000Z

482

Method for wetting a boron alloy to graphite  

DOE Patents (OSTI)

A method is provided for wetting a graphite substrate and spreading a a boron alloy over the substrate. The wetted substrate may be in the form of a needle for an effective ion emission source. The method may also be used to wet a graphite substrate for subsequent joining with another graphite substrate or other metal, or to form a protective coating over a graphite substrate. A noneutectic alloy of boron is formed with a metal selected from the group consisting of nickel (Ni), palladium (Pd), and platinum (Pt) with excess boron, i.e., and atomic percentage of boron effective to precipitate boron at a wetting temperature of less than the liquid-phase boundary temperature of the alloy. The alloy is applied to the substrate and the graphite substrate is then heated to the wetting temperature and maintained at the wetting temperature for a time effective for the alloy to wet and spread over the substrate. The excess boron is evenly dispersed in the alloy and is readily available to promote the wetting and spreading action of the alloy. 1 fig.

Storms, E.K.

1987-08-21T23:59:59.000Z

483

Coal-water slurry spray characteristics of an electronically-controlled accumulator fuel injection system  

Science Conference Proceedings (OSTI)

Experiments have been complete to characterize coal-water slurry sprays from a electronically-controlled accumulator fuel injection system of diesel engine. The sprays were injected into a pressurized chamber equipped with windows. High speed movies, fuel pressures and needle lifts were obtained as a function of time, orifice diameter, coal loading, gas density in the chamber, and accumulator fuel pressure. For the base conditions 50% (by mass) coal loading, 0.4 mm diameter nozzle hole, coal-water slurry pressure of 82 MPa (12,000 psi), and a chamber density of 25 kg/m{sup 3}, the break-up time was 0. 30 ms. An empirical correlation for both spray tip penetration and initial jet velocity was developed. For the conditions of this study, the spray tip penetration and initial jet velocity were 15% greater for coal-water slurry than for diesel fuel or water. Cone angles of the sprays were dependent on the operating conditions and fl