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Note: This page contains sample records for the topic "negative daily imbalances" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
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1

An Equilibrium Model of "Global Imbalances" and Low Interest Rates  

E-Print Network (OSTI)

were converted into dollars using daily exchange rates.and Flexible Ex- change Rates, MIT Press, 1982, pp. 116–156.Imbalances” and Low Interest Rates Ricardo J. Caballero

Caballero, Ricardo J; Farhi, Emmanuel; Gourinchas, Pierre-Olivier

2006-01-01T23:59:59.000Z

2

NREL: Transmission Grid Integration - Energy Imbalance Markets  

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

utilities are therefore considering the adoption of a large-scale energy imbalance market to address fluctuations in electricity generation and load. In an energy imbalance...

3

Earth’s Energy Imbalance  

Science Conference Proceedings (OSTI)

Climate change from increased greenhouse gases arises from a global energy imbalance at the top-of-atmosphere (TOA). TOA measurements of radiation from space can track changes over time but lack absolute accuracy. An inventory of energy storage ...

Kevin E. Trenberth; John T. Fasullo; Magdalena A. Balmaseda

4

Energy Imbalance Markets (Fact Sheet)  

DOE Green Energy (OSTI)

The anticipated increase in variable renewable generation, such as wind and solar power, over the next several years has raised concerns about how system operators will maintain balance between electricity production and demand in the Western Interconnection, especially in its smaller balancing authority areas (BAAs). Given renewable portfolio standards in the West, it is possible that more than 50 gigawatts of wind capacity will be installed by 2020. Significant quantities of solar generation are likely to be added as well. Meanwhile, uncertainties about future load growth and challenges siting new transmission and generation resources may add additional stresses on the Western Interconnection of the future. One proposed method of addressing these challenges is an energy imbalance market (EIM). An EIM is a means of supplying and dispatching electricity to balance fluctuations in generation and load. It aggregates the variability of generation and load over multiple balancing areas (BAs).

Not Available

2012-09-01T23:59:59.000Z

5

Handling class imbalance problem in cultural modeling  

Science Conference Proceedings (OSTI)

Cultural modeling is an emergent and promising research area in social computing. It aims at developing behavioral models of groups and analyzing the impact of culture factors on group behavior using computational methods. Machine learning methods in ... Keywords: ROC analysis, class imbalance problem, classification, cultural modeling, sampling

Peng Su; Wenji Mao; Daniel Zeng; Xiaochen Li; Fei-Yue Wang

2009-06-01T23:59:59.000Z

6

Impact of Energy Imbalance Tariff on Wind Energy  

Science Conference Proceedings (OSTI)

This paper summarizes the results of a study that uses actual wind power data and actual energy prices to analyze the impact of an energy imbalance tariff imposed by the Federal Energy Regulatory Commission on wind power.

Wan, Y.; Milligan, M.; Kirby, B.

2007-07-01T23:59:59.000Z

7

Daily Occurrence Reports  

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

Occurrence Reporting and Processing System Home ORPS Database Access Daily Occurrence Reports Weekly Summary of Significant Occurrences Occurrence Reporting Quality ORPS Training...

8

IMPROVING ELECTRIC FRAUD DETECTION USING CLASS IMBALANCE STRATEGIES  

E-Print Network (OSTI)

. Analysis over consumers historical kWh load profile data from Uruguayan Elec- tric Company (UTE) showsIMPROVING ELECTRIC FRAUD DETECTION USING CLASS IMBALANCE STRATEGIES Mat´ias Di Martino, Federico, jmolinelli}@gmail.com Keywords: Electricity theft, Support vector machine, Optimum path forest, Unbalance

9

Class imbalance and the curse of minority hubs  

Science Conference Proceedings (OSTI)

Most machine learning tasks involve learning from high-dimensional data, which is often quite difficult to handle. Hubness is an aspect of the curse of dimensionality that was shown to be highly detrimental to k-nearest neighbor methods in high-dimensional ... Keywords: Class imbalance, Class overlap, Classification, Curse of dimensionality, Hubness, k-Nearest neighbor

Nenad Tomašev, Dunja Mladeni?

2013-11-01T23:59:59.000Z

10

Negative mass  

E-Print Network (OSTI)

Some physical aspects of negative mass are examined. Several unusual properties, such as the ability of negative mass to penetrate any armor, are analyzed. Other surprising effects include the bizarre system of negative mass chasing positive pass, naked singularities and the violation of cosmic censorship, wormholes, and quantum mechanical results as well. In addition, a brief look into the implications for strings is given.

Richard T Hammond

2013-08-06T23:59:59.000Z

11

Western Interconnection Energy Imbalance Market Status and Prospects (Presentation)  

Science Conference Proceedings (OSTI)

This presentation describes how a new wholesale electricity market for energy imbalance ancillary services could be implemented and operated. Some conclusions of this presentation are: (1) Method for calculating additional reserve requirements due to wind and solar production; (2) EIM results in substantial reduction in reserves requirements and ramping demand; (3) Reduced participation reduces benefits for all but reduces the benefits to non-participants the most; (4) Full participation leads to maximum benefit across the Western Interconnection, up to 42% of total reserve requirement; and (5) Regional EIM implementations have smaller but substantial benefits.

Milligan, M.; Kirby, B.; King, J.; Beuning, S.

2011-10-01T23:59:59.000Z

12

Daily Temperature Lag  

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

Daily Temperature Lag Daily Temperature Lag Name: Shyammayi Status: teacher Grade: K-2 Country: Mauritius Date: Summer 2011 Question: At what time of the day is the temperature hottest? At what time of the day is the temperature coldest? Replies: In general, the hottest part of the day is late afternoon. The sun has passed its peak in the sky but still heats the Earth up until very late in the afternoon. The lowest temperatures are around dawn. Earth has had all night to get rid of the day's heat by radiating it into space. After sunrise, temperatures begin to climb. This can be changed by local storms, sea breezes or mountain breezes and even monsoon winds. Hope this helps. R. W. "Bob" Avakian Instructor Arts and Sciences/CRC Oklahoma State Univ. Inst. of Technology Shyammayi

13

Cross-Validation Estimation for Frequency-Dependent I/Q Imbalance in MIMO-OFDM Receivers  

Science Conference Proceedings (OSTI)

The effects of variation in RF, such as I/Q imbalance and filter mismatch, are extremely important for OFDM wireless accesses. This work presents a low-computational estimation of I/Q imbalances with filter mismatches to improve performance in MIMO-OFDM ... Keywords: Cross validation, Filter mismatch, Frequency-Dependent Imbalance (FDI), I/Q imbalance, MIMO-OFDM

Wei-Chi Lai; Ta-Yang Juan; Terng-Yin Hsu; Sheng-Lun Chiou

2010-07-01T23:59:59.000Z

14

Distillate Imports Surged to Meet Supply/Demand Imbalance  

Gasoline and Diesel Fuel Update (EIA)

receded when weather moderated and new supply began to receded when weather moderated and new supply began to arrive. Imports were the largest source of new supply that arrived to relieve the imbalance that was behind the price spike. This graph shows the dramatic increase on a calendar monthly average basis. During the three weeks ending February 25, distillate fuel oil imports averaged 566 thousand barrels per day. During the prior four weeks, imports only averaged 162 thousand barrels per day. Refinery production on the East Coast also increased. For the three weeks ending February 25, East Coast distillate production averaged 478 thousand barrels per day, which was an increase of about 91 thousand barrels per day or 24% over the prior four weeks. (During the same time period, national distillate production only rose 7 percent.)

15

The effect of imbalance distribution and measurement locations on critical speeds in a turboprop engine rotor  

E-Print Network (OSTI)

The critical speeds of a turbomachine can be defined as the speeds at which synchronous response to imbalance is maximum (Vance,1988). Identifying the proper placement of critical speeds is very important in the design process of turbomachinery. This study examines the influence of imbalance distribution and vibration measurement location on critical speeds for a model turboprop engine rotor. Imbalance response measurements are presented for a full scale model mounted in rolling bearings with squeeze film damper. The measurements were recorded with a Bentley Nevada ADRE 208 Data Acquisition Interface Unit System. These measurements are compared with predictions from a XLROTOR (Spreadsheet for Rotordynamic Analysis) computer model. Measurement imbalance responses show that imbalance location has profound influence on critical speeds. A critical speed variation up to 25 % was found. Comparison between the XLROTOR computer model prediction and measurement shows excellent agreement.

Marin, Manuel

1996-01-01T23:59:59.000Z

16

2010 Expert and Consultant Daily Wages  

Science Conference Proceedings (OSTI)

2010 Expert and Consultant Daily Wages. Based on the OPM Salary Table 2010-GS. ... Daily Daily. Per Diem Salary Scale Minimum Maximum. ...

2012-04-27T23:59:59.000Z

17

On Imbalance Generated by Vortical Flows in a Two-Layer Spherical Boussinesq Primitive Equation Model  

Science Conference Proceedings (OSTI)

The spontaneous adjustment emission of inertia–gravity waves is investigated by examining the amount of imbalance generated during the evolution of unstable jets in an isentropic two-layer primitive equation model on the sphere. To determine the ...

Mohammad Mirzaei; Ali R. Mohebalhojeh; Farhang Ahmadi-Givi

2012-09-01T23:59:59.000Z

18

Examination of Potential Benefits of an Energy Imbalance Market in the Western Interconnection  

SciTech Connect

In the Western Interconnection, there is significant interest in improving approaches to wide-area coordinated operations of the bulk electric power system, in part because of the increasing penetration of variable generation. One proposed solution is an energy imbalance market. This study focused on that approach alone, with the goal of identifying the potential benefits of an energy imbalance market in the year 2020.

Milligan, M.; Clark, K.; King, J.; Kirby, B.; Guo, T.; Liu, G.

2013-03-01T23:59:59.000Z

19

DOE Solar Decathlon: 2007 Daily Journals  

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

Decathlon Director, Richard King, and his wife, Melissa. Richard King, Solar Decathlon organizer, keeps a daily journal during the 2007 Solar Decathlon. Solar Decathlon 2007 Daily...

20

Energy Assurance Daily | Department of Energy  

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

Energy Assurance Daily Energy Assurance Daily Energy Assurance Daily Energy Assurance Daily provides a summary of public information concerning current energy issues. Published Monday through Friday to inform stakeholders of developments affecting energy systems, flows, and markets, it provides highlights of energy issues rather than a comprehensive coverage. Energy Assurance Daily covers: Major energy developments Electricity, petroleum, and natural gas industries Other relevant news Energy prices The Infrastructure Security and Energy Restoration (ISER) Division cannot guarantee the accuracy of the material in the Energy Assurance Daily. Any further use is subject to the copyright restrictions of the source document. The Energy Assurance Daily has workable hypertext links to the

Note: This page contains sample records for the topic "negative daily imbalances" 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

Application of the Lighthill–Ford Theory of Spontaneous Imbalance to Clear-Air Turbulence Forecasting  

Science Conference Proceedings (OSTI)

A new method of clear-air turbulence (CAT) forecasting based on the Lighthill–Ford theory of spontaneous imbalance and emission of inertia–gravity waves has been derived and applied on episodic and seasonal time scales. A scale analysis of this ...

John A. Knox; Donald W. McCann; Paul D. Williams

2008-10-01T23:59:59.000Z

22

Using Electric Vehicles to Mitigate Imbalance Requirements Associated with an Increased Penetration of Wind Generation  

SciTech Connect

The integration of variable renewable generation sources continues to be a significant area of focus for power system planning. Renewable portfolio standards and initiatives to reduce the dependency on foreign energy sources drive much of the deployment. Unfortunately, renewable energy generation sources like wind and solar tend to be highly variable in nature. To counter the energy imbalance caused by this variability, wind generation often requires additional balancing resources to compensate for the variability in the electricity production. With the expected electrification of transportation, electric vehicles may offer a new load resource for meeting all, or part, of the imbalance created by the renewable generation. This paper investigates a regulation-services-based battery charging method on a population of plug-in hybrid electric vehicles to meet the power imbalance requirements associated with the introduction of 11 GW of additional wind generation into the Northwest Power Pool. It quantifies the number of vehicles required to meet the imbalance requirements under various charging assumptions.

Tuffner, Francis K.; Kintner-Meyer, Michael CW

2011-10-10T23:59:59.000Z

23

Fragilities Caused by Dosage Imbalance in Regulation of the Budding Yeast Cell Cycle  

E-Print Network (OSTI)

Cells can maintain their functions despite fluctuations in intracellular parameters, such as protein activities and gene expression levels. This commonly observed biological property of cells is called robustness. On the other hand, these parameters have different limitations, each reflecting the property of the subsystem containing the parameter. The budding yeast cell cycle is quite fragile upon overexpression of CDC14, but is robust upon overexpression of ESP1. The gene products of both CDC14 and ESP1 are regulated by 1:1 binding with their inhibitors (Net1 and Pds1), and a mathematical model predicts the extreme fragility of the cell cycle upon overexpression of CDC14 and ESP1 caused by dosage imbalance between these genes. However, it has not been experimentally shown that dosage imbalance causes fragility of the cell cycle. In this study, we measured the quantitative genetic interactions of these genes by performing combinatorial ‘‘genetic tug-of-war’ ’ experiments. We first showed experimental evidence that dosage imbalance between CDC14 and NET1 causes fragility. We also showed that fragility arising from dosage imbalance between ESP1 and PDS1 is masked by CDH1 and CLB2. The masking function of CLB2 was stabilization of Pds1 by its phosphorylation. We finally modified Chen’s model according

Kazunari Kaizu; Hisao Moriya; Hiroaki Kitano

2010-01-01T23:59:59.000Z

24

Estimation of Daily Degree-hours  

Science Conference Proceedings (OSTI)

Degree-hours have many applications in fields such as agriculture, architecture, and power generation. Since daily mean temperatures are more readily available than hourly temperatures, the difference between mean daily degree-hours computed from ...

Nathaniel B. Guttman; Richard L. Lehman

1992-07-01T23:59:59.000Z

25

Homogenization of Daily Temperatures over Canada  

Science Conference Proceedings (OSTI)

A method to homogenize daily maximum and minimum temperatures over Canada is presented. The procedure is based on previously defined monthly adjustments derived from step changes identified in annual Canadian temperature series. Daily ...

Lucie A. Vincent; X. Zhang; B. R. Bonsal; W. D. Hogg

2002-06-01T23:59:59.000Z

26

The influence of crack-imbalance orientation and orbital evolution for an extended cracked Jeffcott rotor  

E-Print Network (OSTI)

Vibration peaks occurring at rational fractions of the fundamental rotating critical speed, here named Local Resonances, facilitate cracked shaft detection during machine shut-down. A modified Jeffcott-rotor on journal bearings accounting for gravity effects and oscillating around nontrivial equilibrium points is employed. Modal parameter selection allows this linear model to represent first mode characteristics of real machines. Orbit evolution and vibration patterns are analyzed, yielding useful results. Crack detection results indicate that, instead of 1x and 2x components, analysis of the remaining local resonances should have priority; this is due to crack-residual imbalance interaction and to 2x multiple induced origins. Therefore, local resonances and orbital evolution around 1/2, 1/3 and 1/4 of the critical speed are emphasized for various crack-imbalance orientations.

Julio Gomez-Mancilla; Jean-Jacques Sinou; V. R. Nosov; Fabrice Thouverez; A. Zambrano

2008-01-19T23:59:59.000Z

27

CHARGE IMBALANCE  

E-Print Network (OSTI)

normal metal-superconductor (SNS) sandwiches as a func- tionnormal-metal-superconductor (SNS) sandwiches in which thestudied the resistance of SNS sandwiches in which the mean

Clarke, John

2013-01-01T23:59:59.000Z

28

Negative ion generator  

DOE Patents (OSTI)

A negative ion generator is formed from a magnetically insulated transmission line having a coating of graphite on the cathode for producing negative ions and a plurality of apertures on the opposed anode for the release of negative ions. Magnetic insulation keeps electrons from flowing from the cathode to the anode. A transverse magnetic field removes electrons which do escape through the apertures from the trajectory of the negative ions. 8 figs.

Stinnett, R.W.

1984-05-08T23:59:59.000Z

29

Negative ion generator  

DOE Patents (OSTI)

A negative ion generator is formed from a magnetically insulated transmission line having a coating of graphite on the cathode for producing negative ions and a plurality of apertures on the opposed anode for the release of negative ions. Magnetic insulation keeps electrons from flowing from the cathode to the anode. A transverse magnetic field removes electrons which do escape through the apertures from the trajectory of the negative ions.

Stinnett, Regan W. (Albuquerque, NM)

1984-01-01T23:59:59.000Z

30

Energy Assurance Daily (EAD): July 2012  

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

Energy Assurance Daily provides a summary of public information concerning current energy issues. Published Monday through Friday to inform stakeholders of developments affecting energy systems,...

31

Energy Assurance Daily (EAD): January - March 2012  

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

Energy Assurance Daily provides a summary of public information concerning current energy issues. Published Monday through Friday to inform stakeholders of developments affecting energy systems,...

32

Energy Assurance Daily (EAD): April 2012  

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

Energy Assurance Daily provides a summary of public information concerning current energy issues. Published Monday through Friday to inform stakeholders of developments affecting energy systems,...

33

Energy Assurance Daily (EAD): June 2012  

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

Energy Assurance Daily provides a summary of public information concerning current energy issues. Published Monday through Friday to inform stakeholders of developments affecting energy systems,...

34

Energy Assurance Daily (EAD): May 2012  

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

Energy Assurance Daily provides a summary of public information concerning current energy issues. Published Monday through Friday to inform stakeholders of developments affecting energy systems,...

35

2011 Expert and Consultant Daily Wages Based on the OPM ...  

Science Conference Proceedings (OSTI)

Page 1. 2011 Expert and Consultant Daily Wages Based on the OPM Salary Table 2011-GS ... Daily Daily Per Diem Salary Scale Minimum Maximum ...

2011-02-25T23:59:59.000Z

36

Negative ion detachment processes  

DOE Green Energy (OSTI)

This paper discusses the following topics: H{sup {minus}} and D{sup {minus}} collisions with atomic hydrogen; collisional decomposition of SF{sub 6}{sup {minus}}; two-electron loss processes in negative ion collisions; associative electron detachment; and negative ion desorption from surfaces.

Champion, R.L.; Doverspike, L.D.

1990-10-01T23:59:59.000Z

37

Negative electrode composition  

DOE Patents (OSTI)

A secondary electrochemical cell and a negative electrode composition for use therewith comprising a positive electrode containing an active material of a chalcogen or a transiton metal chalcogenide, a negative electrode containing a lithium-aluminum alloy and an amount of a ternary alloy sufficient to provide at least about 5 percent overcharge capacity relative to a negative electrode solely of the lithium-aluminum alloy, the ternary alloy comprising lithium, aluminum, and iron or cobalt, and an electrolyte containing lithium ions in contact with both of the positive and the negative electrodes. The ternary alloy is present in the electrode in the range of from about 5 percent to about 50 percent by weight of the electrode composition and may include lithium-aluminum-nickel alloy in combination with either the ternary iron or cobalt alloys. A plurality of series connected cells having overcharge capacity can be equalized on the discharge side without expensive electrical equipment.

Kaun, Thomas D. (New Lenox, IL); Chilenskas, Albert A. (Western Springs, IL)

1982-01-01T23:59:59.000Z

38

Alternative Approaches to Calculate Benefits of an Energy Imbalance Market With Wind and Solar Energy: Preprint  

DOE Green Energy (OSTI)

The anticipated increase in variable generation in the Western Interconnection over the next several years has raised concerns about how to maintain system balance, especially in smaller Balancing Authority Areas (BAAs). Given renewable portfolio standards in the West, it is possible that more than 50 gigawatts of wind capacity will be installed by 2020. Significant quantities of solar generation are likely to be added as well. The consequent increase in variability and uncertainty that must be managed by the conventional generation fleet and responsive loads has resulted in a proposal for an Energy Imbalance Market (EIM). This paper extends prior work to estimate the reserve requirements for regulation, spinning, and non-spinning reserves with and without the EIM. We also discuss alternative approaches to allocating reserve requirements and show that some apparently attractive allocation methods have undesired consequences.

Kirby, B.; King, J.; Milligan, M.

2012-06-01T23:59:59.000Z

39

Efficiency Measurement of Momentum Imbalance Trigger at CMS for Supersymmetry Searches  

E-Print Network (OSTI)

In searches for new fundamental particles in high energy particle collisions, the ability for a detector to select collisions that might signify the presence of such particles is one of the top priorities. Equally important is to determine how well the selection is done so that procedures can be used to optimize the selection. One such method of collision event selection is known as the momentum imbalance trigger at the CMS detector at the LHC for use in a search for new particles from an extension of the standard model. In this thesis, We measure the efficiency as a function of the trigger as well as the effect the number of collisions that occur at the same time has on its performance.

Davis, Christopher J

2013-05-01T23:59:59.000Z

40

Seasonal Variation in Daily Temperature Ranges  

Science Conference Proceedings (OSTI)

Abrupt spring and autumnal changes in the daily temperature range, from low winter values to higher nonwinter values, were noted in the Minneapolis-St. Paul temperature record. Since this feature was even more evident in five rural and small town ...

David L. Ruschy; Donald G. Baker; Richard H. Skaggs

1991-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Flexible CoScheduling : mitigating load imbalance and improving utilization of heterogeneous resources  

Science Conference Proceedings (OSTI)

Fine-grained parallel applications require all their processes to run simultaneously on distinct processors to achieve good efficiency. This is typically accomplished by space slicing, wherein nodes are dedicated for the duration of the run, or by gang scheduling, wherein time slicing is coordinated across processors. Both schemes suffer from fragmentation, where processors are left idle because jobs cannot be packed with perfect efficiency. Obviously, this leads to reduced utilization and sub-optimal performance. Flexible coscheduling (FCS) solves this problem by monitoring each job's granularity and communication activity, and using gang scheduling only for those jobs that require it. Processes from other jobs, which can be scheduled without any constraints, are used as filler to reduce fragmentation. In addition, inefficiencies due to load imbalance and hardware heterogeneity are also reduced because the classification is done on a per-process basis. FCS has been fully implemented as part of the STORM resource manager, and shown to be competitive with gang scheduling and implicit coscheduling. Keywords: Cluster computing, load balancing, job scheduling, gang scheduling, parallel architectures, heterogeneous clusters, STORM

Frachtenberg, E. (Eitan); Feitelson, Dror G.; Petrini, F. (Fabrizio); Fernández, J. C. (Juan C.)

2002-01-01T23:59:59.000Z

42

DOE Solar Decathlon: 2009 Daily Journals  

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

Richard King next to a deck and planter boxes. Decathlete Way and the U.S. Capitol are in the background. Richard King next to a deck and planter boxes. Decathlete Way and the U.S. Capitol are in the background. Solar Decathlon Director Richard King takes a break from the competition along Decathlete Way. Solar Decathlon 2009 Daily Journals The daily journals highlighted the events of the U.S. Department of Energy Solar Decathlon 2009. Each day, Richard King, Solar Decathlon director, covered the latest on the teams, their standings, and the events going on in the solar village. October 19, 2009 I personally believe one of the greatest discoveries in the field of energy from the 20th century is our ability to generate electricity from sunlight using photovoltaic solar cells. Read more. October 17, 2009 Solar Decathlon 2009 was intriguing and suspenseful to the very end. None

43

Polarized negative ions  

SciTech Connect

This paper presents a survey of methods, commonly in use or under development, to produce beams of polarized negative ions for injection into accelerators. A short summary recalls how the hyperfine interaction is used to obtain nuclear polarization in beams of atoms. Atomic-beam sources for light ions are discussed. If the best presently known techniques are incorporated in all stages of the source, polarized H/sup -/ and D/sup -/ beams in excess of 10 ..mu..A can probably be achieved. Production of polarized ions from fast (keV) beams of polarized atoms is treated separately for atoms in the H(25) excited state (Lamb-Shift source) and atoms in the H(1S) ground state. The negative ion beam from Lamb-Shift sources has reached a plateau just above 1 ..mu..A, but this beam current is adequate for many applications and the somewhat lower beam current is compensated by other desirable characteristics. Sources using fast polarized ground state atoms are in a stage of intense development. The next sections summarize production of polarized heavy ions by the atomic beam method, which is well established, and by optical pumping, which has recently been demonstrated to yield very large nuclear polarization. A short discussion of proposed ion sources for polarized /sup 3/He/sup -/ ions is followed by some concluding remarks.

Haeberli, W.

1981-04-01T23:59:59.000Z

44

Analysis of Benefits of an Energy Imbalance Market in the NWPP  

SciTech Connect

The Northwest Power Pool (NWPP) Market Assessment Committee (MC) Initiative, which was officially launched on March 19, 2012, set out to explore a range of alternatives that could help the Balancing Authorities and scheduling utilities in the NWPP area address growing operational and commercial challenges affecting the regional power system. The MC formed an Analytical Team with technical representatives from each of the member Balancing Areas in the NWPP and with staff of Pacific Northwest National Laboratory (PNNL). This Analytical Team was instructed to conduct extensive studies of intra-hour operation of the NWPP system in the year 2020 and of the NWPP region with 14,671 MW of wind penetration. The effort utilized a sub-hourly production cost model (the PLEXOS® computer model) that inputs data from the Western Electricity Coordinating Council (WECC)-wide Production Cost Model (PCM) to evaluate potential production cost savings. The Analytical Team was given two general options to evaluate: •Energy Imbalance Market (EIM): establishment of an automated, organized NWPP area market for economically supplying energy imbalance within the hour. •Enhanced Market-Operational Tools (EMT) that might augment or replace an EIM. The Analytical The Analytical Team built on the WECC-wide PCM data from prior work done in the WECC and carried forward the evolution of the original WECC Transmission Expansion Planning Policy Committee (TEPPC) 2020 PC0 data base. A large number of modifications and improvements were made to this case and the data were subjected to extensive review by the team members to improve the model representation of the Northwest (NW). MC meetings that were open to the public were held for interested parties to review and provide input to the study. Results for the test, base, and sensitivity case studies performed by the MC Initiative Analytical Team indicate that there are a wide range of benefits that could be obtained from the operation of an EIM in the NWPP depending on what assumptions are made. The instructions from the MC were to determine a "minimum high confidence" range of potential benefits. The results for the Base Case indicate that the EIM benefits ranged from approximately $40 million to $70 million in annual savings from the operation of an EIM in the NWPP footprint. A number of additional relevant sensitivity cases were performed, including low and high water conditions, low and high natural gas prices, and various flex reserve requirements, resource operations, and amounts of resource capability held back during the preschedule period. Along with the results for the Base Case, the results for these studies yielded EIM benefits that clustered within the range of $70 to $80 million dollars per year with potential benefits ranging from approximately $125 million to as little as $17 million per year. Because the design and operation of an EIM could enable participating Balancing Authorities (BAs) to collectively lower the quantity of resources they must carry to meet within-hour balancing needs, a sensitivity case was also performed to analyze the impact that such reductions might have on the benefits from an EIM. The results for this sensitivity case indicate that such reductions could increase the benefits from the operation of an EIM in the NWPP into the range of approximately $130 million to $160 million per year. Also, a sensitivity case for a WECC-wide EIM was performed with the results indicating that the potential benefits to the NWPP could increase into the range of $197 million to $233 million per year. While there may be potential reliability benefits from the coordinated dispatch process underlying the operation of an EIM, reliability benefits from an EIM were out of the scope of this study. The EIM benefit analyses that were performed by the Analytical Team are provided in this report.

Samaan, Nader A.; Bayless, Rich; Symonds, Mark; Nguyen, Tony B.; Jin, Chunlian; Wu, Di; Diao, Ruisheng; Makarov, Yuri V.; Kannberg, Landis D.; Guo, Tao; Dennison-Leonard , Sarah; Goodenough, Mike; Schellberg, Ron; Conger, Sid; Harris, Kevin; Rarity, Matt; Wallace, Steven; Austin, Jamie; Noteboom, Rod; Van Blaricom , Tim; McRunnel, Kim; Apperson, John; Empey, Marshall; Etingov, Pavel V.; Warady, Debra; Brush, Ray; Newkirk, Joshua; Williams, Peter; Landauer, Marv; Owen, Hugh; Morter, Wayne; Haraguchi, Keli; Portouw, Jim; Downey, kathryn; Sorey, Steve; Williams, Stan; Gossa, Teyent; Kalich, Clint; Damiano, Patrick; Macarthur, Clay; Martin, Tom; Hoerner, Joe; Knudsen, Steve; Johnson, Anders; Link, Rick; Holcomb, Dennis

2013-10-18T23:59:59.000Z

45

Primitive Virtual Negative Charge  

E-Print Network (OSTI)

Physical fields, such as gravity and electromagnetic field, are interpreted as results from rearrangement of vacuum particles to get the equilibrium of net charge density and net mass density in 4-dimensional complex space. Then, both fields should interact to each other in that physical interaction is considered as a field-to-field interaction. Hence, Mass-Charge interaction is introduced with primitive-virtual negative charge defined for the mass. With the concept of Mass-Charge interaction electric equilibrium of the earth is discussed, especially about the electric field and magnetic field of the earth. For unsettled phenomena related with the earth's gravity, such as antigravity phenomenon, gravity anomalies during the solar eclipses, the connection between geomagnetic storms and earthquakes, etc., possible explanations are discussed.

Kim, Kiyoung

2008-01-01T23:59:59.000Z

46

Primitive Virtual Negative Charge  

E-Print Network (OSTI)

Physical fields, such as gravity and electromagnetic field, are interpreted as results from rearrangement of vacuum particles to get the equilibrium of net charge density and net mass density in 4-dimensional complex space. Then, both fields should interact to each other in that physical interaction is considered as a field-to-field interaction. Hence, Mass-Charge interaction is introduced with primitive-virtual negative charge defined for the mass. With the concept of Mass-Charge interaction electric equilibrium of the earth is discussed, especially about the electric field and magnetic field of the earth. For unsettled phenomena related with the earth's gravity, such as antigravity phenomenon, gravity anomalies during the solar eclipses, the connection between geomagnetic storms and earthquakes, etc., possible explanations are discussed.

Kiyoung Kim

2008-11-04T23:59:59.000Z

47

Negative ion source  

DOE Patents (OSTI)

An ionization vessel is divided into an ionizing zone and an extraction zone by a magnetic filter. The magnetic filter prevents high-energy electrons from crossing from the ionizing zone to the extraction zone. A small positive voltage impressed on a plasma grid, located adjacent an extraction grid, positively biases the plasma in the extraction zone to thereby prevent positive ions from migrating from the ionizing zone to the extraction zone. Low-energy electrons, which would ordinarily be dragged by the positive ions into the extraction zone, are thereby prevented from being present in the extraction zone and being extracted along with negative ions by the extraction grid. Additional electrons are suppressed from the output flux using ExB drift provided by permanent magnets and the extractor grid electrical field. 14 figs.

Leung, K.N.; Ehlers, K.W.

1984-12-04T23:59:59.000Z

48

Negative ion source  

DOE Patents (OSTI)

An ionization vessel is divided into an ionizing zone and an extraction zone by a magnetic filter. The magnetic filter prevents high-energy electrons from crossing from the ionizing zone to the extraction zone. A small positive voltage impressed on a plasma grid, located adjacent an extraction grid, positively biases the plasma in the extraction zone to thereby prevent positive ions from migrating from the ionizing zone to the extraction zone. Low-energy electrons, which would ordinarily be dragged by the positive ions into the extraction zone, are thereby prevented from being present in the extraction zone and being extracted along with negative ions by the extraction grid. Additional electrons are suppressed from the output flux using ExB drift provided by permanent magnets and the extractor grid electrical field.

Leung, Ka-Ngo (Hercules, CA); Ehlers, Kenneth W. (Alamo, CA)

1984-01-01T23:59:59.000Z

49

Negative ion source  

DOE Patents (OSTI)

An ionization vessel is divided into an ionizing zone and an extraction zone by a magnetic filter. The magnetic filter prevents high-energy electrons from crossing from the ionizing zone to the extraction zone. A small positive voltage impressed on a plasma grid, located adjacent an extraction grid, positively biases the plasma in the extraction zone to thereby prevent positive ions from migrating from the ionizing zone to the extraction zone. Low-energy electrons, which would ordinarily be dragged by the positive ions into the extraction zone, are thereby prevented from being present in the extraction zone and being extracted along with negative ions by the extraction grid. Additional electrons are suppressed from the output flux using ExB drift provided by permanent magnets and the extractor grid electrical field.

Leung, K.N.; Ehlers, K.W.

1982-08-06T23:59:59.000Z

50

Climate Reference Network Daily01 Product | Data.gov  

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

Daily01 Product Daily01 Product Agriculture Community Menu DATA APPS EVENTS DEVELOPER STATISTICS COLLABORATE ABOUT Agriculture You are here Data.gov » Communities » Agriculture » Data Climate Reference Network Daily01 Product Dataset Summary Description The U.S. Climate Reference Network is designed specifically to monitor national climate change with best scientific practice and adherence to the accepted principles of climate observations. USCRN daily temperature mean, maximum, and minimum, daily precipitation, daily global solar radiation, and daily average surface infrared temperature data are available in the Daily01 file set for all stations in the network. Daily mean, maximum, and minimum relative humidity are available for most stations. Tags {"Climate Reference Network",USCRN,CRN,"air temperature",temperature,precipitation,"global solar radiation"," surface temperature","surface infrared temperature","relative humidity","natural resources",water,air,"soil "}

51

Negative ion source  

DOE Patents (OSTI)

A method and apparatus for providing a negative ion source accelerates electrons away from a hot filament electron emitter into a region of crossed electric and magnetic fields arranged in a magnetron configuration. During a portion of the resulting cycloidal path, the electron velocity is reduced below its initial value. The electron accelerates as it leaves the surface at a rate of only slightly less than if there were no magnetic field, thereby preventing a charge buildup at the surface of the emitter. As the electron traverses the cycloid, it is decelerated during the second, third, and fourth quadrants, then reeccelerated as it approaches the end of the fourth quadrant to regain its original velocity. The minimum velocity occurs during the fourth quadrant, and corresponds to an electron temperature of 200.degree. to 500.degree. for the electric and magnetic fields commonly encountered in the ion sources of magnetic sector mass spectrometers. An ion source using the above-described thermalized electrons is also disclosed.

Delmore, James E. (Idaho Falls, ID)

1987-01-01T23:59:59.000Z

52

Improved negative ion source  

DOE Patents (OSTI)

A method and apparatus for providing a negative ion source accelerates electrons away from a hot filament electron emitter into a region of crossed electric and magnetic fields arranged in a magnetron configuration. During a portion of the resulting cycloidal path, the electron velocity is reduced below its initial value. The electron accelerates as it leaves the surface at a rate of only slightly less than if there were no magnetic field, thereby preventing a charge buildup at the surface of the emitter. As the electron traverses the cycloid, it is decelerated during the second, third, and fourth quadrants, then reaccelerated as it approaches the end of the fourth quadrant to regain its original velocity. The minimum velocity occurs during the fourth quadrant, and corresponds to an electron temperature of 200 to 500/sup 0/C for the electric and magnetic fields commonly encountered in the ion sources of magnetic sector mass spectrometers. An ion source using the above-described thermalized electrons is also disclosed.

Delmore, J.E.

1984-05-01T23:59:59.000Z

53

Simulation of Daily Weather Data Using Theoretical Probability Distributions  

Science Conference Proceedings (OSTI)

A computer simulation model was constructed to supply daily weather data to a plant disease management model for potato late blight. In the weather model Monte Carlo techniques were employed to generate daily values of precipitation, maximum ...

J. A. Bruhn; W. E. Fry; G. W. Fick

1980-09-01T23:59:59.000Z

54

SPLIDHOM: A Method for Homogenization of Daily Temperature Observations  

Science Conference Proceedings (OSTI)

One major concern of climate change is the possible rise of temperature extreme events, in terms of occurrence and intensity. To study this phenomenon, reliable daily series are required, for instance to compute daily-based indices: high-order ...

Olivier Mestre; Christine Gruber; Clémentine Prieur; Henri Caussinus; Sylvie Jourdain

2011-11-01T23:59:59.000Z

55

Temperature Effects on the Winter Daily Electric Load  

Science Conference Proceedings (OSTI)

Here we describe the relationship between average daily temperature and winter-daily electric load, as ascertained on the largest electric district in Italy. In particular, it is shown that a sudden 6°C temperature decrease (not a rare event) ...

Paolo Bolzern; Giorgio Fronza; Giuseppe Brusasca

1982-02-01T23:59:59.000Z

56

Operating Reserve Reductions from a Proposed Energy Imbalance Market with Wind and Solar Generation in the Western Interconnection  

DOE Green Energy (OSTI)

This paper considers several alternative forms of an energy imbalance market (EIM) proposed in the nonmarket areas of the Western Interconnection. The proposed EIM includes two changes in operating practices that independently reduce variability and increase access to responsive resources: balancing authority cooperation and sub-hourly dispatch. As the penetration of variable generation increases on the power system, additional interest in coordination would likely occur. Several alternative approaches could be used, but consideration of any form of coordinated unit commitment is beyond the scope of this analysis. This report examines the benefits of several possible EIM implementations--both separately and in concert.

King, J.; Kirby, B.; Milligan, M.; Beuning, S.

2012-05-01T23:59:59.000Z

57

Solar Decathlon 2005 Daily Event Schedule  

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

DAILY EVENT SCHEDULE DAILY EVENT SCHEDULE Last updated on September 30, 2005 Note: This schedule is not part of the official Rules and Regulations and is subject to change at any time. Weds, Sept 28 12:00 AM 12:30 AM 1:00 AM 1:30 AM 2:00 AM 2:30 AM 3:00 AM 3:30 AM 4:00 AM 4:30 AM 5:00 AM 5:30 AM 6:00 AM 6:30 AM 7:00 AM 7:30 AM 8:00 AM 8:30 AM 9:00 AM 9:30 AM 10:00 AM 10:30 AM 11:00 AM 11:30 AM 12:00 PM 12:30 PM 1:00 PM 1:30 PM 2:00 PM 2:30 PM 3:00 PM 3:30 PM 4:00 PM 4:30 PM 5:00 PM 5:30 PM 6:00 PM 6:30 PM 7:00 PM 7:30 PM 8:00 PM 8:30 PM 9:00 PM 9:30 PM 10:00 PM 10:30 PM 11:00 PM 11:30 PM Registration Forrestal Bldg (DOE) Cafeteria National Mall Team/Organizer meeting and Safety Orientation Thurs, Sept 29 12:00 AM 12:30 AM 1:00 AM 1:30 AM 2:00 AM 2:30 AM 3:00 AM 3:30 AM 4:00 AM 4:30 AM 5:00 AM 5:30 AM 6:00 AM 6:30 AM 7:00

58

Three chamber negative ion source  

DOE Patents (OSTI)

A negative ion vessel is divided into an excitation chamber, a negative ionization chamber and an extraction chamber by two magnetic filters. Input means introduces neutral molecules into a first chamber where a first electron discharge means vibrationally excites the molecules which migrate to a second chamber. In the second chamber a second electron discharge means ionizes the molecules, producing negative ions which are extracted into or by a third chamber. A first magnetic filter prevents high energy electrons from entering the negative ionization chamber from the excitation chamber. A second magnetic filter prevents high energy electrons from entering the extraction chamber from the negative ionizing chamber. An extraction grid at the end of the negative ion vessel attracts negative ions into the third chamber and accelerates them. Another grid, located adjacent to the extraction grid, carries a small positive voltage in order to inhibit positive ions from migrating into the extraction chamber and contour the plasma potential. Additional electrons can be suppressed from the output flux using ExB forces provided by magnetic field means and the extractor grid electric potential.

Leung, Ka-Ngo (Hercules, CA); Ehlers, Kenneth W. (Alamo, CA); Hiskes, John R. (Livermore, CA)

1985-01-01T23:59:59.000Z

59

Operating Reserve Implication of Alternative Implementations of an Energy Imbalance Service on Wind Integration in the Western Interconnection: Preprint  

DOE Green Energy (OSTI)

During the past few years, there has been significant interest in alternative ways to manage power systems over a larger effective electrical footprint. Large regional transmission organizations in the Eastern Interconnection have effectively consolidated balancing areas, achieving significant economies of scale that result in a reduction in required reserves. Conversely, in the Western Interconnection there are many balancing areas, which will result in challenges if there is significant wind and solar energy development in the region. A recent proposal to the Western Electricity Coordinating Council suggests a regional energy imbalance service (EIS). To evaluate this EIS, a number of analyses are in process or are planned. This paper describes one part of an analysis of the EIS's implication on operating reserves under several alternative scenarios of the market footprint and participation. We improve on the operating reserves method utilized in the Eastern Wind Integration and Transmission Study and apply this modified approach to data from the Western Wind and Solar Integration Study.

Milligan, M.; Kirby, B.; King, J.; Beuning, S.

2011-07-01T23:59:59.000Z

60

Backstage at the Daily Show | Department of Energy  

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

Backstage at the Daily Show Backstage at the Daily Show Backstage at the Daily Show Addthis Description Backstage footage from Secretary Chu's appearance on the Daily Show where he discuses the green room candy dish and possible lighting considerations. Speakers Secretary Steven Chu Duration 1:32 Topic Energy Efficiency Credit Energy Department Video SECRETARY STEVEN CHU: I'm in the famous green room of the Jon Stewart show. If you look around, I have all these games: Monopoly, a Rubik's Cube, Pictureka! Now if - this is to amuse myself, but in actual fact, the most famous part of this room is this. There's enough chocolate here to put you on a high that - (chuckles) - will really get you going. This is my wife, Jean. JEAN CHU: (Chuckles.) I'm - (chuckles) - edit this out! (Begin recorded segment.)

Note: This page contains sample records for the topic "negative daily imbalances" 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

On the Conditional Distribution of Daily Precipitation Amounts  

Science Conference Proceedings (OSTI)

Possible conditional dependence of the distribution of daily precipitation amounts on the occurrence of precipitation on the preceding day is examined. Test results based on 25 years of data at 30 stations in the conterminous United States show ...

Edwin H. Chin; John F. Miller

1980-09-01T23:59:59.000Z

62

Thailand Daily Rainfall and Comparison with TRMM Products  

Science Conference Proceedings (OSTI)

Daily rainfall data collected from more than 100 gauges over Thailand for the period 1993–2002 are used to study the climatology and spatial and temporal characteristics of Thailand rainfall variations. Comparison of the Thailand gauge (TG) data ...

Roongroj Chokngamwong; Long S. Chiu

2008-04-01T23:59:59.000Z

63

Comprehensive Automated Quality Assurance of Daily Surface Observations  

Science Conference Proceedings (OSTI)

This paper describes a comprehensive set of fully automated quality assurance (QA) procedures for observations of daily surface temperature, precipitation, snowfall, and snow depth. The QA procedures are being applied operationally to the Global ...

Imke Durre; Matthew J. Menne; Byron E. Gleason; Tamara G. Houston; Russell S. Vose

2010-08-01T23:59:59.000Z

64

Climatologically Aided Mapping of Daily Precipitation and Temperature  

Science Conference Proceedings (OSTI)

Accurately mapped meteorological data are an essential component for hydrologic and ecological research conducted at broad scales. A simple yet effective method for mapping daily weather conditions across heterogeneous landscapes is described and ...

Richard D. Hunter; Ross K. Meentemeyer

2005-10-01T23:59:59.000Z

65

Realizations of Daily Weather in Forecast Seasonal Climate  

Science Conference Proceedings (OSTI)

Stochastic daily weather time series models (?“weather generators”?) are parameterized consistent with both local climate and probabilistic seasonal forecasts. Both single-station weather generators, and spatial networks of coherently operating ...

D. S. Wilks

2002-04-01T23:59:59.000Z

66

Regional, Very Heavy Daily Precipitation in NARCCAP Simulations  

Science Conference Proceedings (OSTI)

The authors analyze the ability of the North American Regional Climate Change Assessment Program's ensemble of climate models to simulate very heavy daily precipitation and its supporting processes, comparing simulations that used observation-...

Sho Kawazoe; William J. Gutowski Jr.

2013-08-01T23:59:59.000Z

67

Regional, Very Heavy Daily Precipitation in CMIP5 Simulations  

Science Conference Proceedings (OSTI)

The authors analyze the ability of global climate models (GCMs) from phase 5 of the Coupled Model Intercomparison Project (CMIP5) multimodel ensemble to simulate very heavy daily precipitation and its supporting processes, comparing them with ...

Sho Kawazoe; William J. Gutowski Jr.

2013-08-01T23:59:59.000Z

68

Uncertainty of Daily Isolation Estimates from a Mesoscale Pyranometer Network  

Science Conference Proceedings (OSTI)

Daily insulation values at the earth's surface are required for modeling of biophysical processes and solar energy engineering design. Ground-based pyranometer networks have proliferated in recent years, offering improved spatial coverage for ...

William L. Bland

1996-02-01T23:59:59.000Z

69

Flexibility Reserve Reductions from an Energy Imbalance Market with High Levels of Wind Energy in the Western Interconnection  

DOE Green Energy (OSTI)

The anticipated increase in variable generation in the Western Interconnection (WI) over the next several years has raised concerns about how to maintain system balance, especially in smaller Balancing Areas (BAs). Given renewable portfolio standards in the West, it is possible that more than 50 gigawatts (GW) of wind capacity will be installed by 2020. Significant quantities of solar generation are likely to be added as well. The consequent increase in variability and uncertainty that must be managed by the conventional generation fleet and responsive load make it attractive to consider ways in which Balancing Area Authorities (BAAs) can pool their variability and response resources, thus taking advantage of geographic and temporal diversity to increase overall operational efficiency. Our analysis considers several alternative forms of an Energy Imbalance Market (EIM) that have been proposed in the non-market areas of the WI. The proposed EIM includes two changes in operating practices that independently reduce variability and increase access to responsive resources: BAA cooperation and sub-hourly dispatch. As proposed, the EIM does not consider any form of coordinated unit commitment; however, over time it is possible that BAAs would develop formal or informal coordination plans. This report examines the benefits of several possible EIM implementations, both separately and in concert.

King, J.; Kirby, B.; Milligan, M.; S. Beuning

2011-10-01T23:59:59.000Z

70

Negative selection algorithms without generating detectors  

Science Conference Proceedings (OSTI)

Negative selection algorithms are immune-inspired classifiers that are trained on negative examples only. Classification is performed by generating detectors that match none of the negative examples, and these detectors are then matched against ... Keywords: artificial immune systems, consistent learning, negative selection

Maciej Li?kiewicz; Johannes Textor

2010-07-01T23:59:59.000Z

71

Amplitude and frequency experimental field measurements of a rotating?imbalance seismic source associated with changes in lithology surrounding a borehole  

Science Conference Proceedings (OSTI)

Field measurements of the vibration amplitude of a rotating?imbalance seismic source in a liquid?filled borehole are described. The borehole was a cased oil well that had been characterized by gamma?ray cement bond and compensated neutron litho?density/gamma?ray logs. The well logs indicated an abrupt transition from shale to limestone at a depth of 2638 ft. The vibration amplitude and frequency of a rotating?imbalance seismic source was measured versus applied voltage as the source was raised from 2654 to 2618 ft through the shale–limestone transition. It was observed that the vibration amplitude changed by approximately 10% in magnitude and the frequency changed approximately 15% as the source passed the shale–limestone transition. The measurements were compared to predictions provided by a two?dimensional analytical model of a rotating?imbalance source located in a liquid?filled bore hole. It was observed that the sensitivity of the experimentally measured vibration amplitude of the seismic source to the properties of the surrounding geologic media was an order of magnitude greater than that predicted by the two?dimensional analytical model.

2003-01-01T23:59:59.000Z

72

Automatic voltage imbalance detector  

DOE Patents (OSTI)

A device for indicating and preventing damage to voltage cells such as galvanic cells and fuel cells connected in series by detecting sequential voltages and comparing these voltages to adjacent voltage cells. The device is implemented by using operational amplifiers and switching circuitry is provided by transistors. The device can be utilized in battery powered electric vehicles to prevent galvanic cell damage and also in series connected fuel cells to prevent fuel cell damage.

Bobbett, Ronald E. (Los Alamos, NM); McCormick, J. Byron (Los Alamos, NM); Kerwin, William J. (Tucson, AZ)

1984-01-01T23:59:59.000Z

73

Invisible Science: Lab Breakthroughs in Our Daily Lives | Department of  

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

Invisible Science: Lab Breakthroughs in Our Daily Lives Invisible Science: Lab Breakthroughs in Our Daily Lives Invisible Science: Lab Breakthroughs in Our Daily Lives April 24, 2012 - 2:30pm Addthis The Lab Breakthroughs video series focuses on the array of technological advancements and discoveries that stem from research performed in the National Labs, including improvements in industrial processes, discoveries in fundamental scientific research, and innovative medicines. See the Lab Breakthroughs topic page for the most recent videos and Q&As with researchers. The Lab Breakthroughs video series focuses on the array of technological advancements and discoveries that stem from research performed in the National Labs, including improvements in industrial processes, discoveries

74

Daylighter Daily Solar Roof Light | Open Energy Information  

Open Energy Info (EERE)

Daylighter Daily Solar Roof Light Daylighter Daily Solar Roof Light Jump to: navigation, search Name Daylighter Daily Solar Roof Light Address 1991 Crocker Road, Suite 600 Place Cleveland, Ohio Zip 44145 Sector Solar Product Installation; Manufacturing Phone number 440-892-3312 Website http://www.SolarLightisFree.co Coordinates 41.4648875°, -81.9506519° 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":41.4648875,"lon":-81.9506519,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

75

Warm Weather and the Daily Commute | Department of Energy  

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

Warm Weather and the Daily Commute Warm Weather and the Daily Commute Warm Weather and the Daily Commute May 7, 2013 - 12:02pm Addthis Biking to work helps you get some exercise while reducing your carbon footprint. | Photo courtesy of iStockphoto.com/olaser Biking to work helps you get some exercise while reducing your carbon footprint. | Photo courtesy of iStockphoto.com/olaser Elizabeth Spencer Communicator, National Renewable Energy Laboratory How can I participate? Check out options for busing or carpooling in your area or, if you live close, try walking or biking to work. You know the weather is starting to warm up when you start hearing about those "bike, bus, or walk to work" challenges. And while my local news just started drumming up publicity for theirs, I've seen these events pop up in

76

Photoelectron spectroscopy of negative ions  

Science Conference Proceedings (OSTI)

Ultraviolet photoelectron spectroscopy of negative ions was used to probe the anionic and neutral states of the halogen monoxides, halogen dioxides, halocarbenes, and fluorovinylidene species. Ions, created in a flowing afterglow source, were mass selected and photodetached by continuous monochromatic laser radiation, and the kinetic energy of the photodetached electrons were determined. The photoelectron spectra provide electronic and vibrational structure. Photoelectron spectra of the halogen monoxides yielded adiabatic electron affinities, neutral and anion frequencies, and spin-orbit splittings. Franck-Condon analyses provided the change in bond length between the neutral and anion species. Neutral heats of formation and dissociation energies were combined with electron affinities to determine anion heats of formation and dissociation energies. Adiabatic electron affinities, neutral vibrational frequencies and anion vibrational frequencies were determined from photoelectron spectra of OClO[sup [minus

Gilles, M.K.

1993-01-01T23:59:59.000Z

77

Global Increasing Trends in Annual Maximum Daily Precipitation  

Science Conference Proceedings (OSTI)

This study investigates the presence of trends in annual maximum daily precipitation time series obtained from a global dataset of 8326 high-quality land-based observing stations with more than 30 years of record over the period from 1900 to 2009. ...

Seth Westra; Lisa V. Alexander; Francis W. Zwiers

2013-06-01T23:59:59.000Z

78

Daily rainfall disaggregation using HYETOS model for Peninsular Malaysia  

Science Conference Proceedings (OSTI)

In this paper, we have examined the applicability of single site disaggregation model (HYETOS) based on the Poisson cluster model to disaggregate daily rainfall to hourly data using proportional adjusting procedure. In this study, the modified Bartlett ... Keywords: disaggregation, hyetos, poisson cluster processes

Ibrahim Suliman Hanaish; Kamarulzaman Ibrahim; Abdul Aziz Jemain

2011-07-01T23:59:59.000Z

79

Generating Multiyear Gridded Daily Rainfall over New Zealand  

Science Conference Proceedings (OSTI)

Daily rainfall totals are a key input for hydrological models that are designed to simulate water and pollutant flow through both soil and waterways. Within New Zealand there are large areas and many river catchments where no long-term rainfall ...

Andrew Tait; Richard Turner

2005-09-01T23:59:59.000Z

80

On an Additive Model of Daily Temperature Climates  

Science Conference Proceedings (OSTI)

Guttman and Plantico reported on an additive model to describe daily temperature climates. This note reports on spectral analyses of the nonrandom residuals from the model. We concluded that quasi-periodic features are not present in the 1951–80 ...

Nathaniel B. Guttman; Marc S. Plantico

1989-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Description: Lithium batteries are used daily in our work  

E-Print Network (OSTI)

with batteries from the same package or with the same expiration date. Avoid at all costs batteries that haveDescription: Lithium batteries are used daily in our work activities from flashlights, cell phones containing one SureFire 3-volt non-rechargeable 123 lithium battery and one Interstate 3-volt non

82

Variability in Daily, Zonal Mean Lower-Stratospheric Temperatures  

Science Conference Proceedings (OSTI)

Satellite data from the microwave sounding unit (MSU) channel 4, when carefully merged, provide daily zonal anomalies of lower-stratosphere temperature with a level of precision between 0.01° and 0.08°C per 2.5° latitude band. Global averages of ...

John R. Christy; S. James Drouilhet Jr.

1994-01-01T23:59:59.000Z

83

IEP - Water-Energy Interface: Total Maximum Daily Load Page  

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

Total Maximum Daily Loads (TMDLs) Total Maximum Daily Loads (TMDLs) The overall goal of the Clean Water Act is to "restore and maintain the chemical, physical, and biological integrity of the NationÂ’s waters." In 1999, EPA proposed changes to Section 303(d), to establish Total Maximum Daily Loads (TMDLs) for watersheds that do not meet this goal. The TMDL is the highest amount of a given pollutant that is permissible in that body of water over a given period of time. TMDLs include both waste load allocation (WLA) for point sources and load allocations for non-point sources. In Appalachia, acid mine drainage (AMD) is the single most damaging non-point source. There is also particular concern of the atmospheric deposition of airborne sulfur, nitrogen, and mercury compounds. States are currently in the process of developing comprehensive lists of impaired waters and establishing TMDLs for those waters. EPA has recently proposed a final rule that will require states to develop TMDLs and implement plans for improving water quality within the next 10 years. Under the new rule, TMDL credits could be traded within a watershed.

84

Cointegration of the Daily Electric Power System Load and the Weather  

E-Print Network (OSTI)

The paper examines the cointegration of the daily electric power system load and the weather by a field intelligent system. The daily load has been modelled by dynamic regressions. A "Daily Artificial Dispather" thermal intelligent system has been costructed. Time and energy tests have been obtained for this intelligent system. The improvement in the daily load forecast, achieved by this intelligent system, has been obtained. The predicted daily electricity price has been found.

Stefanov, Stefan Z

2007-01-01T23:59:59.000Z

85

THE NEGATIVE IMPACT OF COLD WATER...  

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

NEGATIVE IMPACT OF COLD WATER BYPASS ON SOLAR DOMESTIC HOT WATER SYSTEMS Final Report DRAFT Prepared for THE NEW YORK STATE ENERGY RESEARCH AND DEVELOPMENT AUTHORITY Albany, NY...

86

Avoiding Negative Probabilities in Quantum Mechanics  

E-Print Network (OSTI)

As currently understood since its discovery, the bare Klein-Gordon theory consists of negative quantum probabilities which are considered to be physically meaningless if not outright obsolete. Despite this annoying setback, these negative probabilities are what led the great Paul Dirac in 1928 to the esoteric discovery of the Dirac Equation. The Dirac Equation led to one of the greatest advances in our understanding of the physical world. In this reading, we ask the seemingly senseless question, "Do negative probabilities exist in quantum mechanics?" In an effort to answer this question, we arrive at the conclusion that depending on the choice one makes of the quantum probability current, one will obtain negative probabilities. We thus propose a new quantum probability current of the Klein-Gordon theory. This quantum probability current leads directly to positive definite quantum probabilities. Because these negative probabilities are in the bare Klein-Gordon theory, intrinsically a result of negative energies, the fact that we here arrive at a theory with positive probabilities, means that negative energy particles are not to be considered problematic as is the case in the bare Klein-Gordon theory. From an abstract-objective stand-point; in comparison with positive energy particles, the corollary is that negative energy particles should have equal chances to exist. As to why these negative energy particles do not exist, this is analogous to asking why is it that Dirac's antimatter does not exist in equal proportions with matter. This problem of why negative energy particles do not exist in equal proportions with positive energy particles is a problem that needs to be solved by a future theory.

Golden Gadzirayi Nyambuya

2013-08-15T23:59:59.000Z

87

Variability in daily, zonal mean lower-stratospheric temperatures  

Science Conference Proceedings (OSTI)

Satellite data from the microwave sounding unit (MSU) channel 4, when carefully merged, provide daily zonal anomalies of lower-stratosphere temperature with a level of precision between 0.01[degrees] and 0.08[degrees]C per 2.5[degrees] latitude band. Global averages of these daily zonal anomalies reveal the prominent warming events due to volcanic aerosol in 1982 (El Chichon) and 1991 (Mt. Pinatubo), which are on the order of 1[degrees]C. The quasibiennel oscillation (QBO) may be extracted from these zonal data by applying a spatial filter between 15[degrees]N and 15[degrees]S latitude, which resembles the meridional curvature. Previously published relationships between the QBO and the north polar stratospheric temperatures during northern winter are examined but were not found to be reproduced in the MSU4 data. Sudden stratospheric warmings in the north polar region are represented in the MSU4 data for latitudes poleward of 70[degrees]N. In the Southern Hemisphere, there appears to be a moderate relationship between total ozone concentration and MSU4 temperatures, though it has been less apparent in 1991 and 1992. In terms of empirical modes of variability revealed significant power in the 15-20 day period band.

Christy, J.R. (Univ. of Alabama, Huntsville, AL (United States)); Drouilhet, S.J. Jr. (Moorhead State Univ., MN (United States))

1994-01-01T23:59:59.000Z

88

Combined Total Amount of Oil and Gas Recovered Daily from the...  

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

Combined Total Amount of Oil and Gas Recovered Daily from the Top Hat and Choke Line oil recovery systems - XLS Combined Total Amount of Oil and Gas Recovered Daily from the Top...

89

Combined Total Amount of Oil and Gas Recovered Daily from the...  

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

Combined Total Amount of Oil and Gas Recovered Daily from the Top Hat and Choke Line oil recovery systems - ODS format Combined Total Amount of Oil and Gas Recovered Daily from the...

90

Local-Scale Variability of Daily Solar Radiation—San Diego County, California  

Science Conference Proceedings (OSTI)

The spatial variability of daily solar radiation values over a region of several hundred square kilometers was examined. Coefficients of variability were obtained as the standard deviations of between-station daily radiation difference divided by ...

Edward Aguado

1986-05-01T23:59:59.000Z

91

Trends in Daily Solar Radiation and Precipitation Coefficients of Variation since 1984  

Science Conference Proceedings (OSTI)

This study investigates the possibility of changes in daily scale solar radiation and precipitation variability. Coefficients of variation (CVs) were computed for the daily downward surface solar radiation product from the International Satellite ...

David Medvigy; Claudie Beaulieu

2012-02-01T23:59:59.000Z

92

Validation in an Arid Area of an Algorithm for the Estimation of Daily Solar Radiation  

Science Conference Proceedings (OSTI)

The Thornton–Running algorithm to estimate daily global radiation was tested at a site in a coastal desert of the eastern Mediterranean. In this algorithm three factors are multiplied in order to compute the daily global radiation: the total ...

P. R. Berliner; K. Droppelmann

2003-04-01T23:59:59.000Z

93

Observational Evidence for Reduction of Daily Maximum Temperature by Croplands in the Midwest United States  

Science Conference Proceedings (OSTI)

Climate model simulations have shown that conversion of natural forest vegetation to croplands in the United States cooled climate. The cooling was greater for daily maximum temperature than for daily minimum temperature, resulting in a reduced ...

Gordon B. Bonan

2001-06-01T23:59:59.000Z

94

Statistical Tests for Comparison of Daily Variability in Observed and Simulated Climates  

Science Conference Proceedings (OSTI)

Tests for differences in daily variability based on the jackknife are presented. These tests properly account for the effect of autocorrelation in the data and are reasonably robust against departures from normality. Three measures for the daily ...

T. Adri Buishand; Jules J. Beersma

1996-10-01T23:59:59.000Z

95

An Overview of the Global Historical Climatology Network-Daily Database  

Science Conference Proceedings (OSTI)

A database is described that has been designed to fulfill the need for daily climate data over global land areas. The dataset, known as Global Historical Climatology Network (GHCN)-Daily, was developed for a wide variety of potential applications, ...

Matthew J. Menne; Imke Durre; Russell S. Vose; Byron E. Gleason; Tamara G. Houston

2012-07-01T23:59:59.000Z

96

Evaluation of ASCAT-Based Daily Gridded Winds in the Tropical Indian Ocean  

Science Conference Proceedings (OSTI)

The quality of daily gridded Advanced Scatterometer (ASCAT; DASCAT) blended winds is examined in the tropical Indian Ocean using 3-day running mean gridded Quick Scatterometer (QuikSCAT; QSCAT) winds and in situ daily winds from the Research ...

S. Sivareddy; M. Ravichandran; M. S. Girishkumar

2013-07-01T23:59:59.000Z

97

A Method to Estimate Missing Daily Maximum and Minimum Temperature Observations  

Science Conference Proceedings (OSTI)

A method to estimate missing daily maximum and minimum temperatures is presented. Temperature estimates are based on departures from daily temperature normals at the three closest stations with similar observation times. Although applied to ...

Arthur T. DeGaetano; Keith L. Eggleston; Warren W. Knapp

1995-02-01T23:59:59.000Z

98

Seasonal Predictability of Daily Rainfall Characteristics in Central Northern Chile for Dry-Land Management  

Science Conference Proceedings (OSTI)

The seasonal predictability of daily winter rainfall characteristics relevant to dry-land management was investigated in the Coquimbo region of central northern Chile, with focus on the seasonal rainfall total, daily rainfall frequency, and mean ...

Koen Verbist; Andrew W. Robertson; Wim M. Cornelis; Donald Gabriels

2010-09-01T23:59:59.000Z

99

Trends in Total Precipitation and Frequency of Daily Precipitation Extremes over China  

Science Conference Proceedings (OSTI)

Based on a newly developed daily precipitation dataset of 740 stations in China and more robust trend detection techniques, trends in annual and seasonal total precipitation and in extreme daily precipitation, defined as those larger than its ...

Panmao Zhai; Xuebin Zhang; Hui Wan; Xiaohua Pan

2005-04-01T23:59:59.000Z

100

Form EIA-930 HOURLY AND DAILY BALANCING AUTHORITY OPERATIONS REPORT  

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

930 930 HOURLY AND DAILY BALANCING AUTHORITY OPERATIONS REPORT INSTRUCTIONS Due Date: mm/dd/yyyy Approved: OMB No. 1905-0129 Approval Expires: 10/31/2016 Burden: 0.19 hours Page 1 Draft for Discussion only PURPOSE Form EIA-930 requires Internet posting of hourly balancing authority operating data. The posted data are used to monitor the current status and trends of the electric power industry, and to support enhancement of electric system operations. REQUIRED RESPONDENTS For the contiguous United States: all entities that are listed in NERC's Compliance Registry as a balancing authority must post balancing authority operating information required by this survey. Other than the Midwest ISO (MISO), registered balancing authorities that are parties

Note: This page contains sample records for the topic "negative daily imbalances" 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

Challenges for Na-ion Negative Electrodes  

E-Print Network (OSTI)

Na-ion batteries have been proposed as candidates for replacing Li-ion batteries. In this paper we examine the viability of Na-ion negative electrode materials based on Na alloys or hard carbons in terms of volumetric ...

Chevrier, V. L.

102

Negative ion formation processes: A general review  

SciTech Connect

The principal negative ion formation processes will be briefly reviewed. Primary emphasis will be placed on the more efficient and universal processes of charge transfer and secondary ion formation through non-thermodynamic surface ionization. 86 refs., 20 figs.

Alton, G.D.

1990-01-01T23:59:59.000Z

103

Superconductive microstrip exhibiting negative differential resistivity  

DOE Patents (OSTI)

A device capable of exhibiting negative differential electrical resistivity over a range of values of current and voltage is formed by vapor- depositing a thin layer of a material capable of exhibiting superconductivity on an insulating substrate, establishing electrical connections at opposite ends of the deposited strip, and cooling the alloy into its superconducting range. The device will exhibit negative differential resistivity when biased in the current- induced resistive state.

Huebener, R.P.; Gallus, D.E.

1975-10-28T23:59:59.000Z

104

Negative Energy Seen By Accelerated Observers  

E-Print Network (OSTI)

The sampled negative energy density seen by inertial observers, in arbitrary quantum states is limited by quantum inequalities, which take the form of an inverse relation between the magnitude and duration of the negative energy. The quantum inequalities severely limit the utilization of negative energy to produce gross macroscopic effects, such as violations of the second law of thermodynamics. The restrictions on the sampled energy density along the worldlines of accelerated observers are much weaker than for inertial observers. Here we will illustrate this with several explicit examples. We consider the worldline of a particle undergoing sinusoidal motion in space in the presence of a single mode squeezed vacuum state of the electromagnetic field. We show that it is possible for the integrated energy density along such a worldline to become arbitrarily negative at a constant average rate. Thus the averaged weak energy condition is violated in these examples.This can be the case even when the particle moves at non-relativistic speeds. We use the Raychaudhuri equation to show that there can be net defocussing of a congruence of these accelerated worldlines. This defocussing is an operational signature of the negative integrated energy density. These results in no way invalidate nor undermine either the validity or utility of the quantum inequalities for inertial observers. In particular, they do not change previous constraints on the production of macroscopic effects with negative energy, e.g., the maintenance of traversable wormholes.

L. H. Ford; Thomas A. Roman

2013-02-12T23:59:59.000Z

105

Dependence of Extreme Daily Maximum Temperatures on Antecedent Soil Moisture in the Contiguous United States during Summer  

Science Conference Proceedings (OSTI)

The paper presents an analysis of the dependence of summertime daily maximum temperature on antecedent soil moisture using daily surface observations from a selection of stations in the contiguous United States and daily time series of soil ...

Imke Durre; John M. Wallace; Dennis P. Lettenmaier

2000-07-01T23:59:59.000Z

106

Quantum Confinement and Negative Heat Capacity  

E-Print Network (OSTI)

Thermodynamics dictates that the specific heat of a system is strictly non-negative. However, in finite classical systems there are well known theoretical and experimental cases where this rule is violated, in particular finite atomic clusters. Here, we show for the first time that negative heat capacity can also occur in finite quantum systems. The physical scenario on which this effect might be experimentally observed is discussed. Observing such an effect might lead to the design of new light harvesting nano devices, in particular a solar nano refrigerator.

Pablo Serra; Marcelo Carignano; Fahhad Alharbi; Sabre Kais

2013-05-09T23:59:59.000Z

107

Partial energies fluctuations and negative heat capacities  

E-Print Network (OSTI)

We proceed to a critical examination of the method used in nuclear fragmentation to exhibit signals of negative heat capacity. We show that this method leads to unsatisfactory results when applied to a simple and well controlled model. Discrepancies are due to incomplete evaluation of potential energies.

Xavier Campi; H. Krivine; E. Plagnol; N. Sator

2004-06-16T23:59:59.000Z

108

Partial energies fluctuations and negative heat capacities  

E-Print Network (OSTI)

We proceed to a critical examination of the method used in nuclear fragmentation to exhibit signals of negative heat capacity. We show that this method leads to unsatisfactory results when applied to a simple and well controlled model. Discrepancies are due to incomplete evaluation of potential energies.

Campi, X; Plagnol, E; Campi, Xavier; ccsd-00002099, ccsd

2004-01-01T23:59:59.000Z

109

Negative Bias Temperature Instability in CMOS Devices  

Science Conference Proceedings (OSTI)

This paper reviews the experimental and modeling efforts to understand the mechanism of Negative Bias Temperature Instability (NBTI) in p-MOSFETs, which is becoming a serious reliability concern for analog and digital CMOS circuits. Conditions for interface ... Keywords: MOSFET, NBTI, Reaction-Diffusion model, bulk traps, hydrogen diffusion, interface traps, parameter instability

S. Mahapatra; M. A. Alam; P. Bharath Kumar; T. R. Dalei; D. Varghese; D. Saha

2005-06-01T23:59:59.000Z

110

Daily intake of antioxidants in relation to survival among adult patients diagnosed with malignant glioma  

E-Print Network (OSTI)

II patients, moderate intake of water-soluble folate wasfor tertiles of daily intake of water-soluble antioxidants4: Associations between intake of water-soluble antioxidants

2010-01-01T23:59:59.000Z

111

Daily canopy photosynthesis model through temporal and spatial scaling for remote sensing applications  

E-Print Network (OSTI)

estimating daily net photosynthesis. Ecol. Model. 58, 209 –Canopy reflectance, photosynthesis, and transpira- tion.model of forest photosynthesis compared with measurements by

Chen, J.M; Liu, J; Cihlar, J; Goulden, M.L

1999-01-01T23:59:59.000Z

112

Experimental evaluation of a negative ion source for a heavy ionfusion negative ion driver  

DOE Green Energy (OSTI)

Negative halogen ions have recently been proposed as a possible alternative to positive ions for heavy ion fusion drivers because electron accumulation would not be a problem in the accelerator, and if desired, the beams could be photodetached to neutrals [1,2,3]. To test the ability to make suitable quality beams, an experiment was conducted at Lawrence Berkeley National Laboratory using chlorine in an RF-driven ion source. Without introducing any cesium (which is required to enhance negative ion production in hydrogen ion sources) a negative chlorine current density of 45 mA/cm{sup 2} was obtained under the same conditions that gave 57 mA/cm{sup 2} of positive chlorine, suggesting the presence of nearly as many negative ions as positive ions in the plasma near the extraction plane. The negative ion spectrum was 99.5% atomic chlorine ions, with only 0.5% molecular chlorine, and essentially no impurities. Although this experiment did not incorporate the type of electron suppression technology that is used in negative hydrogen beam extraction, the ratio of co-extracted electrons to Cl{sup -} was as low as 7 to 1, many times lower than the ratio of their mobilities, suggesting that few electrons are present in the near-extractor plasma. This, along with the near-equivalence of the positive and negative ion currents, suggests that the plasma in this region was mostly an ion-ion plasma. The negative chlorine current density was relatively insensitive to pressure, and scaled linearly with RF power. If this linear scaling continues to hold at higher RF powers, it should permit current densities of 100 mA/cm{sup 2}, sufficient for present heavy ion fusion injector concepts. The effective ion temperatures of the positive and negative ions appeared to be similar and relatively low for a plasma source.

Grisham, L.R.; Hahto, S.K.; Hahto, S.T.; Kwan, J.W.; Leung, K.N.

2005-01-18T23:59:59.000Z

113

Experimental Evaluation of a Negative Ion Source for a Heavy Ion Fusion Negative Ion Driver  

DOE Green Energy (OSTI)

Negative halogen ions have recently been proposed as a possible alternative to positive ions for heavy ion fusion drivers because electron accumulation would not be a problem in the accelerator, and if desired, the beams could be photo-detached to neutrals. To test the ability to make suitable quality beams, an experiment was conducted at Lawrence Berkeley National Laboratory using chlorine in an RF-driven ion source. Without introducing any cesium (which is required to enhance negative ion production in hydrogen ion sources) a negative chlorine current density of 45 mA/cm{sup 2} was obtained under the same conditions that gave 57 45 mA/cm{sup 2} of positive chlorine, suggesting the presence of nearly as many negative ions as positive ions in the plasma near the extraction plane. The negative ion spectrum was 99.5% atomic chlorine ions, with only 0.5% molecular chlorine, and essentially no impurities. Although this experiment did not incorporate the type of electron suppression technology that i s used in negative hydrogen beam extraction, the ratio of co-extracted electrons to Cl{sup -} was as low as 7 to 1, many times lower than the ratio of their mobilities, suggesting that few electrons are present in the near-extractor plasma. This, along with the near-equivalence of the positive and negative ion currents, suggests that the plasma in this region was mostly an ion-ion plasma. The negative chlorine current density was relatively insensitive to pressure, and scaled linearly with RF power. If this linear scaling continues to hold at higher RF powers, it should permit current densities of 100 45 mA/cm{sup 2}, sufficient for present heavy ion fusion injector concepts. The effective ion temperatures of the positive and negative ions appeared to be similar and relatively low for a plasma source.

L.R. Grisham, S.K. Hahto, S.T. Hahto, J.W. Kwan, and K.N. Leung

2004-06-16T23:59:59.000Z

114

Negative Sequence Effects on Generator Rotors  

Science Conference Proceedings (OSTI)

This report is the second part of a study of the effects of severe negative sequence events on round rotor turbine generators. The first part (EPRI report 1014910) introduced simplified models to investigate the thermal and mechanical stresses resulting from unbalanced short circuits and other events. The current report provides documentation on these simplified models. It also describes further studies of the retaining ring and introduces additional models for the pole face and cross-slot regions.

2009-01-16T23:59:59.000Z

115

MEASUREMENTS, ERRORS, AND NEGATIVE KINETIC ENERGY  

E-Print Network (OSTI)

An analysis of errors in measurement yields new insight into the penetration of quantum particles into classically forbidden regions. In addition to “physical” values, realistic measurements yield “unphysical ” values which, we show, can form a consistent pattern. An experiment to isolate a particle in a classically forbidden region obtains negative values for its kinetic energy. These values realize the concept of a weak value, discussed in previous works. 0

Yakir Aharonov; Sandu Popescu; Daniel Rohrlich; Lev Vaidman

1993-01-01T23:59:59.000Z

116

Negative Sequence Effects on Generator Rotors  

Science Conference Proceedings (OSTI)

Main generator rotors are constructed and designed to provide decades of reliable and trouble-free operation. However, a number of negative sequence and motoring incidences have occurred over the years that can adversely impact reliable operation of generator rotors and, ultimately, production of electrical power. Severe overheating leads to rotor material changes, such as steel hardness, and may if not detected, ultimately lead to catastrophic failure. This report discusses the effects of severe negativ...

2007-12-18T23:59:59.000Z

117

Negative Electrodes for Li-Ion Batteries  

DOE Green Energy (OSTI)

Graphitized carbons have played a key role in the successful commercialization of Li-ion batteries. The physicochemical properties of carbon cover a wide range; therefore identifying the optimum active electrode material can be time consuming. The significant physical properties of negative electrodes for Li-ion batteries are summarized, and the relationship of these properties to their electrochemical performance in nonaqueous electrolytes, are discussed in this paper.

Kinoshita, Kim; Zaghib, Karim

2001-10-01T23:59:59.000Z

118

Negative Halogen Ions for Fusion Applications  

DOE Green Energy (OSTI)

Over the past quarter century, advances in hydrogen negative ion sources have extended the usable range of hydrogen isotope neutral beams to energies suitable for large magnetically confined fusion devices. Recently, drawing upon this experience, negative halogen ions have been proposed as an alternative to positive ions for heavy ion fusion drivers in inertial confinement fusion, because electron accumulation would be prevented in negative ion beams, and if desired, the beams could be photo-detached to neutrals. This paper reports the results of an experiment comparing the current density and beam emittance of Cl+ and Cl- extracted from substantially ion-ion plasmas with that of Ar+ extracted from an ordinary electron-ion plasma, all using the same source, extractor, and emittance scanner. At similar discharge conditions, the Cl- current was typically 85 – 90% of the positive chlorine current, with an e-/ Cl- ratio as low as seven without grid magnets. The Cl- was as much as 76% of the Ar+ current from a discharge with the same RF drive. The minimum normalized beam emittance and inferred ion temperatures of Cl+, Cl-, and Ar+ were all similar, so the current density and optical quality of Cl- appear as suitable for heavy ion fusion driver applications as a positive noble gas ion of similar mass. Since F, I, and Br should all behave similarly in an ion source, they should also be suitable as driver beams.

Grisham, L.R.; Kwan, J.W.; Hahto, S.K.; Hahto, S.T.; Leung, K.N.; Westenskow, G.

2006-01-01T23:59:59.000Z

119

Experimental evaluation of a negative ion source for a heavy ion fusion negative ion driver  

E-Print Network (OSTI)

National Laboratory using chlorine in an RF-driven ionion sources) a negative chlorine current density of 45 mA/cm57 mA/cm 2 of positive chlorine, suggesting the presence of

Grisham, L.R.; Hahto, S.K.; Hahto, S.T.; Kwan, J.W.; Leung, K.N.

2005-01-01T23:59:59.000Z

120

Daily Precipitation Forecasting in Dakar Using the NCEP–NCAR Reanalyses  

Science Conference Proceedings (OSTI)

In order to predict the daily rain amount at Dakar at 1–5-day lead times, 65 thermodynamical and dynamical indices are computed at each grid point for the area 15°S–30°N, 30°W–30°E. The data used are NCEP–NCAR reanalyses and daily rainfall ...

Abdoulaye Deme; Alain Viltard; Pierre de Félice

2003-02-01T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Taking China's Temperature: Daily Range, Warming Trends, and Regional Variations, 1955–2000  

Science Conference Proceedings (OSTI)

In analyzing daily climate data from 305 weather stations in China for the period from 1955 to 2000, the authors found that surface air temperatures are increasing with an accelerating trend after 1990. They also found that the daily maximum (T...

Binhui Liu; Ming Xu; Mark Henderson; Ye Qi; Yiqing Li

2004-11-01T23:59:59.000Z

122

Southeastern United States Daily Temperature Ranges Associated with the El Niño–Southern Oscillation  

Science Conference Proceedings (OSTI)

The daily temperature range (DTR), daily maximum minus minimum temperature, at 290 Southeast United States stations is examined with respect to the warm and cold phases of the El Niño–Southern Oscillation (ENSO) for the period of 1948–2009. A ...

Daniel M. Gilford; Shawn R. Smith; Melissa L. Griffin; Anthony Arguez

123

Ecological Modelling 143 (2001) 227243 A globally applicable model of daily solar irradiance  

E-Print Network (OSTI)

. At Luquillo, Puerto Rico, the daily atmospheric transmittance for solar radiation was approximately equal incoming radiation. This sensi- tivity depends upon the local partitioning of solar energy that varies, nearly linear relationship between ~ and daily average relative humidity (rhave) at Luquillo, Puerto Rico

Hunt Jr., E. Raymond

124

Principal Investigators: Long-Term Daily and Monthly Climate Records from  

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

Principal Investigators: Long-Term Daily and Monthly Climate Records from Principal Investigators: Long-Term Daily and Monthly Climate Records from Stations Across the Contiguous United States M.J. Menne, C.N. Williams, Jr., and R.S. Vose National Climatic Data Center National Oceanic and Atmospheric Administration CDIAC and the USHCN PIs encourage users to make this site their main source for obtaining USHCN data, where you can take advantage of data plotting, and, for daily data, user-friendly station-specific downloading. This site will update both daily and monthly data near the beginning of each year, so as to include data through December of the previous year. However, if you need real-time data updates, you should visit the NCDC website. For NCDC-updated daily data please use the Global Historical Climatology Network (GHCN) website where you will find a directory of USHCN stations.

125

Today in Energy - Daily Prices - Prices - U.S. Energy Information  

Gasoline and Diesel Fuel Update (EIA)

December 20, 2013Daily Prices December 20, 2013Daily Prices Daily wholesale and retail prices for various energy products are shown below, including spot prices and select futures prices at national or regional levels. Prices are updated each weekday (excluding federal holidays), typically between 7:30 and 8:30 a.m. This page is meant to provide a snapshot of selected daily prices only. Prices are republished by EIA with permission as follows: Wholesale Spot Petroleum Prices from Thomson Reuters, Retail Petroleum Prices from AAA Fuel Gauge Report, Prompt-Month Energy Futures from CME Group, and Select Spot Prices from SNL Energy. Daily Prices Wholesale Spot Petroleum Prices, 12/19/13 Close Product Area Price Percent Change* Crude Oil ($/barrel) WTI 98.40 +0.8 Brent 110.78 +1.1 Louisiana Light 108.27 +4.9

126

A simple method to downscale daily wind statistics to hourly wind data  

E-Print Network (OSTI)

Wind is the principal driver in the wind erosion models. The hourly wind speed data were generally required for precisely wind erosion modeling. In this study, a simple method to generate hourly wind speed data from daily wind statistics (daily average and maximum wind speeds together or daily average wind speed only) was established. A typical windy location with 3285 days (9 years) measured hourly wind speed data were used to validate the downscaling method. The results showed that the overall agreement between observed and simulated cumulative wind speed probability distributions appears excellent, especially for the wind speeds greater than 5 m s-1 range (erosive wind speed). The results further revealed that the values of daily average erosive wind power density (AWPD) calculated from generated wind speeds fit the counterparts computed from measured wind speeds well with high models' efficiency (Nash-Sutcliffe coefficient). So that the hourly wind speed data can be predicted from daily average and maximu...

Guo, Zhongling

2013-01-01T23:59:59.000Z

127

DEVELOPMENT PLANNING AND REGIONAL IMBALANCES  

E-Print Network (OSTI)

All Working Papers are preliminary materials circulated to promote discussion and comment. References in publications to Working Papers should be cleared with the author to protect the tentative nature of these papers. 2

Mohamed Aslam; Asan Ali; Golam Hassan; Kedah Da; Mohamed Aslam; Gulam Hassan; Asan Ali; Golam Hassan

2003-01-01T23:59:59.000Z

128

Automatic voltage-imbalance detector  

DOE Patents (OSTI)

A device is described for indicating and preventing damage to voltage cells such as galvanic cells and fuel cells connected in series by detecting sequential voltages and comparing these voltages to adjacent voltage cells. The device is implemented by using operational amplifiers and switching circuitry is provided by transistors. The device can be utilized in battery powered electric vehicles to prevent galvanic cell damage and also in series connected fuel cells to prevent fuel cell damage.

Bobbett, R.E.; McCormick, J.B.; Kerwin, W.J.

1981-05-20T23:59:59.000Z

129

Get Daily Energy Analysis Delivered to Your Website | Department of Energy  

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

Get Daily Energy Analysis Delivered to Your Website Get Daily Energy Analysis Delivered to Your Website Get Daily Energy Analysis Delivered to Your Website August 8, 2011 - 3:39pm Addthis Get Daily Energy Analysis Delivered to Your Website Matthew Loveless Matthew Loveless Data Integration Specialist, Office of Public Affairs How can I participate? Go to EIA's outreach page for Today in Energy widgets, badges and banners. Now everyone can feature the U.S. Energy Information Administration's (EIA) Today in Energy content on their website and favorite social networking sites. Today in Energy, the agency's education product published every weekday, highlights current energy issues, topics, and data trends in short articles written in plain language. EIA has banners and widgets in different colors and sizes to fit many different websites.

130

Background: Long-Term Daily and Monthly Climate Records from Stations  

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

Background: Long-Term Daily and Monthly Climate Records from Stations Background: Long-Term Daily and Monthly Climate Records from Stations Across the Contiguous United States The United States Historical Climatology Network (USHCN) is a high-quality data set of daily and monthly records of basic meteorological variables from 1218 observing stations across the 48 contiguous United States. Daily data include observations of maximum and minimum temperature, precipitation amount, snowfall amount, and snow depth; monthly data consist of monthly-averaged maximum, minimum, and mean temperature and total monthly precipitation. Most of these stations are U.S. Cooperative Observing Network stations located generally in rural locations, while some are National Weather Service First-Order stations that are often located in more urbanized environments. The USHCN has been developed over the years at

131

Temporal Disaggregation of Daily Temperature and Precipitation Grid Data for Norway  

Science Conference Proceedings (OSTI)

This paper presents a simple approach for the temporal disaggregation from daily to 3-hourly observed gridded temperature and precipitation (1 × 1 km2) on the national scale. The intended use of the disaggregated 3-hourly data is to recalibrate ...

Klaus Vormoor; Thomas Skaugen

2013-06-01T23:59:59.000Z

132

Analysis of the Impact of Snow on Daily Weather Variability in Mountainous Regions Using MM5  

Science Conference Proceedings (OSTI)

The impacts of snow on daily weather variability, as well as the mechanisms of snowmelt over the Sierra Nevada, California–Nevada, mountainous region, were studied using the fifth-generation Pennsylvania State University–National Center for ...

Jiming Jin; Norman L. Miller

2007-04-01T23:59:59.000Z

133

Use of a Principal Components Analysis for the Generation of Daily Time Series  

Science Conference Proceedings (OSTI)

A new approach for generating daily time series is considered in response to the weather-derivatives market. This approach consists of performing a principal components analysis to create independent variables, the values of which are then ...

Christine Dreveton; Yann Guillou

2004-07-01T23:59:59.000Z

134

Determination of Semivariogram Models to Krige Hourly and Daily Solar Irradiance in Western Nebraska  

Science Conference Proceedings (OSTI)

In this paper, linear and spherical semivariogram models were determined for use in kriging hourly and daily solar irradiation for every season of the year. The data used to generate the models were from 18 weather stations in western Nebraska. ...

G. G. Merino; D. Jones; D. E. Stooksbury; K. G. Hubbard

2001-06-01T23:59:59.000Z

135

Grid History: A Geostationary Satellite Technique for Estimating Daily Rainfall in the Tropics  

Science Conference Proceedings (OSTI)

A new technique is described for estimating daily rainfall by means of visible and infrared geostationary satellite imagery. It is designed for the tropics and warm-season midlatitudes. Because it operates on a grid of points and measures time ...

David W. Martin; Michael R. Howland

1986-02-01T23:59:59.000Z

136

Comparison of Daily Averaged Reflection, Transmission, and Absorption for Selected Radiative Flux Transfer Approximations  

Science Conference Proceedings (OSTI)

This paper compares accuracy for the daily averaged reflection, transmission, and absorption of solar flux derived from the delta-four-stream approximation and a few selected two-stream approximations. In the chosen variety of two-stream ...

Xun Zhu; Albert Arking

1994-12-01T23:59:59.000Z

137

Cakewalking into representation : Gabriele Münter's America travels (1898-1900) and art of dailiness  

E-Print Network (OSTI)

This study explores the fashioning of Gabriele Münter as a German modernist with a focus on the eclipse of her struggles in coming to representation, the rich complexity of her processes, and the importance of dailiness ...

Bible, Ann Vollmann

2008-01-01T23:59:59.000Z

138

Developing hourly weather data for locations having only daily weather data  

Science Conference Proceedings (OSTI)

A methodology was developed to modify an hourly TMY weather tape to be representative of a location for which only average daily weather parameters were avilable. Typical hourly and daily variations in solar flux, and other parameters, were needed to properly exercise a computer model to predict the transient performance of a solar controlled greenhouse being designed for Riyadh, Saudi Arabia. The starting point was a TMY tape for Yuma, Arizona, since the design temperatures for summer and winter are nearly identical for Yuma and Riyadh. After comparing six of the most important weather variables, the hourly values on the Yuma tape were individually adjusted to give the same overall daily average conditions as existed in the long-term Riyadh data. Finally, a statistical analysis was used to confirm quantitatively that the daily variations between the long term average values for Riyadh and the modified TMY weather tape for Yuma matched satisfactorily.

Talbert, S.G.; Herold, K.E.; Jakob, F.E.; Lundstrom, D.K.

1983-06-01T23:59:59.000Z

139

Satellite solar insolation-based daily evapotranspiration estimation in Puerto Rico  

Science Conference Proceedings (OSTI)

A technique is presented in which satellite solar insolation estimates are used to predict daily reference evapotranspiration (ETo) using the Penman-Monteith (PM), Preistly-Taylor (PT) and Hargreaves-Samini (HS) methods for Puerto Rico. For ...

Eric W. Harmsen; John Mecikalski; Melvin J. Cardona-Soto; Alejandra Rojas Gonzalez; Ramön Vasquez

2009-05-01T23:59:59.000Z

140

Modulation of Daily Precipitation over Southwest Asia by the Madden–Julian Oscillation  

Science Conference Proceedings (OSTI)

Analysis of daily observations shows that wintertime (November–April) precipitation over Southwest Asia is modulated by Madden–Julian oscillation (MJO) activity in the eastern Indian Ocean, with strength comparable to the interannual variability. ...

Mathew Barlow; Matthew Wheeler; Bradfield Lyon; Heidi Cullen

2005-12-01T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Impact of Daily Arctic Sea Ice Variability in CAM3.0 during Fall and Winter  

Science Conference Proceedings (OSTI)

Climate projections suggest that an ice-free summer Arctic Ocean is possible within several decades and with this comes the prospect of increased ship traffic and safety concerns. The daily sea ice concentration tendency in five Coupled Model ...

Dyre O. Dammann; Uma S. Bhatt; Peter L. Langen; Jeremy R. Krieger; Xiangdong Zhang

2013-03-01T23:59:59.000Z

142

Downscaling and Projection of Winter Extreme Daily Precipitation over North America  

Science Conference Proceedings (OSTI)

Large-scale atmospheric variables have been statistically downscaled to derive winter (December–March) maximum daily precipitation at stations over North America using the generalized extreme value distribution (GEV). Here, the leading principal ...

Jiafeng Wang; Xuebin Zhang

2008-03-01T23:59:59.000Z

143

Observed Trends in Indices of Daily Temperature Extremes in South America 1960–2000  

Science Conference Proceedings (OSTI)

A workshop on enhancing climate change indices in South America was held in Maceió, Brazil, in August 2004. Scientists from eight southern countries brought daily climatological data from their region for a meticulous assessment of data quality ...

L. A. Vincent; T. C. Peterson; V. R. Barros; M. B. Marino; M. Rusticucci; G. Carrasco; E. Ramirez; L. M. Alves; T. Ambrizzi; M. A. Berlato; A. M. Grimm; J. A. Marengo; L. Molion; D. F. Moncunill; E. Rebello; Y. M. T. Anunciação; J. Quintana; J. L. Santos; J. Baez; G. Coronel; J. Garcia; I. Trebejo; M. Bidegain; M. R. Haylock; D. Karoly

2005-12-01T23:59:59.000Z

144

Combined Total Amount of Oil and Gas Recovered Daily from the...  

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

XLS Combined Total Amount of Oil and Gas Recovered Daily from the Top Hat and Choke Line oil recovery systems - XLS Updated through 12:00 AM on July 16, 2010. 52Item84Recovery...

145

Combined Total Amount of Oil and Gas Recovered Daily from the...  

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

ODS format Combined Total Amount of Oil and Gas Recovered Daily from the Top Hat and Choke Line oil recovery systems - ODS format Updated through 12:00 AM on July 16, 2010....

146

Improving Estimates of Heavy and Extreme Precipitation Using Daily Records from European Rain Gauges  

Science Conference Proceedings (OSTI)

The long-term variability in heavy precipitation characteristics over Europe for the period 1950–2000 is analyzed using high-quality daily records of rain gauge measurements from the European Climate Assessment (ECA) dataset. To improve the ...

Olga Zolina; Clemens Simmer; Konstantin Belyaev; Alice Kapala; Sergey Gulev

2009-06-01T23:59:59.000Z

147

Australian Experimental Model Output Statistics Forecasts of Daily Maximum and Minimum Temperature  

Science Conference Proceedings (OSTI)

Model output statistics (MOS) forecasts of daily temperature maxima and minima are developed for seven Australian cities. The developmental data and method of derivation of the MOS equations are described and the equations briefly compared to ...

F. Woodcock

1984-10-01T23:59:59.000Z

148

A Harmonic Approach for Calculating Daily Temperature Normals Constrained by Homogenized Monthly Temperature Normals  

Science Conference Proceedings (OSTI)

NOAA released the new 1981–2010 climate normals in July 2011. These included monthly and daily normals of minimum and maximum temperature. Monthly normals were computed from monthly temperature values that were corrected for biases (i.e., ...

Anthony Arguez; Scott Applequist

2013-07-01T23:59:59.000Z

149

Frequency Distribution of Daily ITCZ Patterns over the Western–Central Pacific  

Science Conference Proceedings (OSTI)

This study attempts to explore a comprehensive and compact approach for delineating the multiscale and multivariate characteristics of the ITCZ over the western–central Pacific based on daily satellite observations of precipitation, SSTs, and ...

Baode Chen; Xin Lin; Julio T. Bacmeister

2008-09-01T23:59:59.000Z

150

A Hybrid Orographic plus Statistical Model for Downscaling Daily Precipitation in Northern California  

Science Conference Proceedings (OSTI)

A hybrid (physical–statistical) scheme is developed to resolve the finescale distribution of daily precipitation over complex terrain. The scheme generates precipitation by combining information from the upper-air conditions and from sparsely ...

Ganesh R. Pandey; Daniel R. Cayan; Michael D. Dettinger; Konstantine P. Georgakakos

2000-12-01T23:59:59.000Z

151

EIA - Daily Report 9/14/05 - Hurricane Katrina's Impact on U...  

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

gas production was shut in, equivalent to 35.18 percent of daily Gulf of Mexico natural gas production (which had been 10 billion cubic feet per day). EIA released its monthly...

152

Systematic Biases in Manual Observations of Daily Maximum and Minimum Temperature  

Science Conference Proceedings (OSTI)

The authors demonstrate that manual observations of daily maximum and minimum temperature are strongly biased toward temperatures ending in certain digits. The nature and severity of these biases are quantified using standard statistical methods. ...

Jon M. Nese

1994-05-01T23:59:59.000Z

153

Sensitivity of Local Daily Temperature Change Estimates to the Selection of Downscaling Models and Predictors  

Science Conference Proceedings (OSTI)

A number of statistical downscaling models are applied to the Canadian Climate Centre general circulation model (CCCM) outputs to provide climate change estimates for local daily surface temperature at a network of 39 stations in central and ...

Radan Huth

2004-02-01T23:59:59.000Z

154

A Detailed Evaluation of GPCP 1° Daily Rainfall Estimates over the Mississippi River Basin  

Science Conference Proceedings (OSTI)

This study provides an intensive evaluation of the Global Precipitation Climatology Project (GPCP) 1° daily (1DD) rainfall products over the Mississippi River basin, which covers 435 1° latitude × 1° longitude grids for the period of January 1997–...

Mekonnen Gebremichael; Witold F. Krajewski; Mark L. Morrissey; George J. Huffman; Robert F. Adler

2005-05-01T23:59:59.000Z

155

Rainfall Intensity, the Weibull Distribution, and Estimation of Daily Surface Runoff  

Science Conference Proceedings (OSTI)

A new method for estimating absorption and runoff at a point on the basis of total daily precipitation and the absorption capacity of the soil is proposed. The method is based on a statistical characterization of the variation of precipitation ...

Daniel S. Wilks

1989-01-01T23:59:59.000Z

156

Statistical Evaluation of Combined Daily Gauge Observations and Rainfall Satellite Estimates over Continental South America  

Science Conference Proceedings (OSTI)

This paper describes a comprehensive assessment of a new high-resolution, gauge–satellite-based analysis of daily precipitation over continental South America during 2004. This methodology is based on a combination of additive and multiplicative ...

Daniel A. Vila; Luis Gustavo G. de Goncalves; David L. Toll; Jose Roberto Rozante

2009-04-01T23:59:59.000Z

157

Estimates of Tropical Analysis Differences in Daily Values Produced by Two Operational Centers  

Science Conference Proceedings (OSTI)

In order to asses the uncertainty of daily synoptic analyses for the atmospheric state, the intercomparison of three First GARP Global Experiment (FGGE) level IIIb datasets is conducted. The original analyses and reanalyses produced by the ...

Akira Kasahara; Arthur P. Mizzi

1992-02-01T23:59:59.000Z

158

Automation: A Step toward Improving the Quality of Daily Temperature Data Produced by Climate Observing Networks  

Science Conference Proceedings (OSTI)

The research documented in this manuscript demonstrates that undeniable differences exist between values of daily temperature recorded by the National Weather Service Cooperative Observer Program network and data recorded by the Oklahoma Mesonet. ...

Christopher A. Fiebrich; Kenneth C. Crawford

2009-07-01T23:59:59.000Z

159

Understanding the Characteristics of Daily Precipitation over the United States Using the North American Regional Reanalysis  

Science Conference Proceedings (OSTI)

This study examines the seasonal characteristics of daily precipitation over the United States using the North American Regional Reanalysis (NARR). To help understand the physical mechanisms that contribute to changes in the characteristics of ...

Emily J. Becker; Ernesto Hugo Berbery; R. Wayne Higgins

2009-12-01T23:59:59.000Z

160

Generalized Linear Models for Site-Specific Density Forecasting of U.K. Daily Rainfall  

Science Conference Proceedings (OSTI)

Site-specific probability density rainfall forecasts are needed to price insurance premiums, contracts, and other financial products based on precipitation. The spatiotemporal correlations in U.K. daily rainfall amounts over the Thames Valley are ...

Max A. Little; Patrick E. McSharry; James W. Taylor

2009-03-01T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Intercomparison of Daily Precipitation Statistics over the United States in Observations and in NCEP Reanalysis Products  

Science Conference Proceedings (OSTI)

A comparison of the statistics of daily precipitation over the conterminous United States is carried out using gridded station data and three generations of reanalysis products in use at the National Centers for Environmental Prediction (NCEP). ...

R. W. Higgins; V. E. Kousky; V. B. S. Silva; E. Becker; P. Xie

2010-09-01T23:59:59.000Z

162

Influence of Daily Rainfall Characteristics on Regional Summertime Precipitation over the Southwestern United States  

Science Conference Proceedings (OSTI)

The regional variability in the summertime precipitation over the southwestern United States is studied using stochastic chain-dependent models generated from 70 yr of station-based daily precipitation observations. To begin, the spatiotemporal ...

Bruce T. Anderson; Jingyun Wang; Suchi Gopal; Guido Salvucci

2009-10-01T23:59:59.000Z

163

The Influence of Large-Scale Climate Variability on Winter Maximum Daily Precipitation over North America  

Science Conference Proceedings (OSTI)

The generalized extreme value (GEV) distribution is fitted to winter season daily maximum precipitation over North America, with indices representing El Niño–Southern Oscillation (ENSO), the Pacific decadal oscillation (PDO), and the North ...

Xuebin Zhang; Jiafeng Wang; Francis W. Zwiers; Pavel Ya Groisman

2010-06-01T23:59:59.000Z

164

Production of intense negative hydrogen beams with polarized nuclei by selective neutralization of cold negative ions  

DOE Patents (OSTI)

A process for selectively neutralizing H/sup -/ ions in a magnetic field to produce an intense negative hydrogen ion beam with spin polarized protons. Characteristic features of the process include providing a multi-ampere beam of H/sup -/ ions that are

Hershcovitch, A.

1984-02-13T23:59:59.000Z

165

An analysis of the potential for shifting electric power demand within daily load requirement  

SciTech Connect

This report analyzes the potential for shifting the electric power demand within the daily load requirements for large industrial and commercial customers of the Philadelphia Electric Company. This shifting of electric power demand would tend to flatten the daily load curve of electricity demand, benefitting both the power industry and the consumer. Data on estimated summer load curves of large commercial and industrial customers are analyzed for load flattening potential. Cost savings to the customers are determined. (GRA)

Lamb, P.G.

1974-01-01T23:59:59.000Z

166

Daily radiation model for use in the simulation of passive solar buildings  

DOE Green Energy (OSTI)

A model is presented to characterize solar radiation with just three input parameters for each day. This compressed daily radiation data may be used in place of hourly data in simulations of passive solar buildings. This method is tested with the SUNCAT passive simulation. Global horizontal and direct normal radiation data are input using the compressed daily form instead of by hour. Simulation results are found to be comparable to results based on hourly radiation data.

Sillman, S.; Wortman, D.

1981-04-01T23:59:59.000Z

167

Estimating the Time Dependence of Air Temperature Using Daily Maxima and Minima: A Comparison of Three Methods  

Science Conference Proceedings (OSTI)

Many models in a variety of disciplines require air temperature throughout the day as an input, yet often the only data available are daily extrema. Several methods for estimating the diurnal change in temperature from daily extrema have been ...

J. M. Baker; D. C. Reicosky; D. G. Baker

1988-12-01T23:59:59.000Z

168

A Novel Method for the Homogenization of Daily Temperature Series and Its Relevance for Climate Change Analysis  

Science Conference Proceedings (OSTI)

Instrumental daily series of temperature are often affected by inhomogeneities. Several methods are available for their correction at monthly and annual scales, whereas few exist for daily data. Here, an improved version of the higher-order ...

Andrea Toreti; Franz G. Kuglitsch; Elena Xoplaki; Jürg Luterbacher; Heinz Wanner

2010-10-01T23:59:59.000Z

169

Spatial Interpolation of Daily Maximum and Minimum Air Temperature Based on Meteorological Model Analyses and Independent Observations  

Science Conference Proceedings (OSTI)

Hourly meteorological forecast model initializations are used to guide the spatial interpolation of daily cooperative network station data in the northeastern United States. The hourly model data are transformed to daily maximum and minimum ...

Arthur T. DeGaetano; Brian N. Belcher

2007-11-01T23:59:59.000Z

170

A Southeastern South American Daily Gridded Dataset of Observed Surface Minimum and Maximum Temperature for 1961–2000  

Science Conference Proceedings (OSTI)

This study presents a southeastern South American gridded dataset of daily minimum and maximum surface temperatures for 1961–2000. The data used for the gridding are observed daily data from meteorological stations in Argentina, Brazil, Paraguay, and ...

Bárbara Tencer; Matilde Rusticucci; Phil Jones; David Lister

2011-10-01T23:59:59.000Z

171

Negative Electrodes Improve Safety in Lithium Cells and Batteries...  

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

Negative Electrodes Improve Safety in Lithium Cells and Batteries Technology available for licensing: Enhanced stability at a lower cost negativeelectrodes...

172

The potential of different artificial neural network (ANN) techniques in daily global solar radiation modeling based on meteorological data  

Science Conference Proceedings (OSTI)

The main objective of present study is to predict daily global solar radiation (GSR) on a horizontal surface, based on meteorological variables, using different artificial neural network (ANN) techniques. Daily mean air temperature, relative humidity, sunshine hours, evaporation, and wind speed values between 2002 and 2006 for Dezful city in Iran (32 16'N, 48 25'E), are used in this study. In order to consider the effect of each meteorological variable on daily GSR prediction, six following combinations of input variables are considered: (I)Day of the year, daily mean air temperature and relative humidity as inputs and daily GSR as output. (II)Day of the year, daily mean air temperature and sunshine hours as inputs and daily GSR as output. (III)Day of the year, daily mean air temperature, relative humidity and sunshine hours as inputs and daily GSR as output. (IV)Day of the year, daily mean air temperature, relative humidity, sunshine hours and evaporation as inputs and daily GSR as output. (V)Day of the year, daily mean air temperature, relative humidity, sunshine hours and wind speed as inputs and daily GSR as output. (VI)Day of the year, daily mean air temperature, relative humidity, sunshine hours, evaporation and wind speed as inputs and daily GSR as output. Multi-layer perceptron (MLP) and radial basis function (RBF) neural networks are applied for daily GSR modeling based on six proposed combinations. The measured data between 2002 and 2005 are used to train the neural networks while the data for 214 days from 2006 are used as testing data. The comparison of obtained results from ANNs and different conventional GSR prediction (CGSRP) models shows very good improvements (i.e. the predicted values of best ANN model (MLP-V) has a mean absolute percentage error (MAPE) about 5.21% versus 10.02% for best CGSRP model (CGSRP 5)). (author)

Behrang, M.A.; Assareh, E. [Department of Mechanical Engineering, Young Researchers Club, Islamic Azad University, Dezful Branch (Iran); Ghanbarzadeh, A.; Noghrehabadi, A.R. [Department of Mechanical Engineering, Engineering Faculty, Shahid Chamran University, Ahvaz (Iran)

2010-08-15T23:59:59.000Z

173

A greedy strategy for detecting negative cost cycles in networks  

Science Conference Proceedings (OSTI)

In this paper, we develop a greedy strategy for the problem of checking whether a network (directed graph) with positive and negative costs on its edges has a negative cost cycle. We call our approach the Vertex Contraction algorithm; it is the first ... Keywords: Bellman-Ford, Negative cost cycle detection, Relaxation, Vertex Contraction

K. Subramani; L. Kovalchick

2005-04-01T23:59:59.000Z

174

Development and Testing of Canada-Wide Interpolated Spatial Models of Daily Minimum–Maximum Temperature and Precipitation for 1961–2003  

Science Conference Proceedings (OSTI)

The application of trivariate thin-plate smoothing splines to the interpolation of daily weather data is investigated. The method was used to develop spatial models of daily minimum and maximum temperature and daily precipitation for all of ...

Michael F. Hutchinson; Dan W. McKenney; Kevin Lawrence; John H. Pedlar; Ron F. Hopkinson; Ewa Milewska; Pia Papadopol

2009-04-01T23:59:59.000Z

175

Negative ion source with hollow cathode discharge plasma  

SciTech Connect

A negative ion source of the type where negative ions are formed by bombarding a low-work-function surface with positive ions and neutral particles from a plasma, wherein a highly ionized plasma is injected into an anode space containing the low-work-function surface. The plasma is formed by hollow cathode discharge and injected into the anode space along the magnetic field lines. Preferably, the negative ion source is of the magnetron type.

Hershcovitch, Ady (Mt. Sinai, NY); Prelec, Krsto (Setauket, NY)

1983-01-01T23:59:59.000Z

176

Negative ion source with hollow cathode discharge plasma  

DOE Patents (OSTI)

A negative ion source of the type where negative ions are formed by bombarding a low-work-function surface with positive ions and neutral particles from a plasma, wherein a highly ionized plasma is injected into an anode space containing the low-work-function surface is described. The plasma is formed by hollow cathode discharge and injected into the anode space along the magnetic field lines. Preferably, the negative ion source is of the magnetron type.

Hershcovitch, A.; Prelec, K.

1980-12-12T23:59:59.000Z

177

Combining Positive and Negative Thermal Expansion Materials to ...  

Science Conference Proceedings (OSTI)

Presentation Title, Combining Positive and Negative Thermal Expansion Materials to Tailor the Coefficient of Thermal Expansion in Metal/Ceramic Composites.

178

Negative-ion sources for neutral-beam systems  

Science Conference Proceedings (OSTI)

There are three main methods now used to produce negative hydrogen ions: charge exchange, volume production, and surface production, and this paper briefly describes these three systems.

Ehlers, K.W.

1983-06-01T23:59:59.000Z

179

Exposure characteristics of high?resolution negative resists  

Science Conference Proceedings (OSTI)

Positive and negative resist systems are both essential in the microfabrication of experimental devices. While numerous positive resists have been shown to have high?resolution

Kaolin Grace Chiong; Shalom Wind; David Seeger

1990-01-01T23:59:59.000Z

180

Omnidirectional Single-negative Gap and in Fibonacci Sequences ...  

Science Conference Proceedings (OSTI)

negative index materials (including DNG and SNG materials) have exhibited special features. [5–7]. It is found that the periodic stacking of alternating layers of

Note: This page contains sample records for the topic "negative daily imbalances" 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

Structures with Negative Refractive Index for Applications in ...  

Iowa State University and Ames Laboratory researchers have developed materials and structures with a negative refractive index that potentially open new frontiers in ...

182

Daily snow depth measurements from 195 stations in the United States  

SciTech Connect

This document describes a database containing daily measurements of snow depth at 195 National Weather Service (NWS) first-order climatological stations in the United States. The data have been assembled and made available by the National Climatic Data Center (NCDC) in Asheville, North Carolina. The 195 stations encompass 388 unique sampling locations in 48 of the 50 states; no observations from Delaware or Hawaii are included in the database. Station selection criteria emphasized the quality and length of station records while seeking to provide a network with good geographic coverage. Snow depth at the 388 locations was measured once per day on ground open to the sky. The daily snow depth is the total depth of the snow on the ground at measurement time. The time period covered by the database is 1893--1992; however, not all station records encompass the complete period. While a station record ideally should contain daily data for at least the seven winter months (January through April and October through December), not all stations have complete records. Each logical record in the snow depth database contains one station`s daily data values for a period of one month, including data source, measurement, and quality flags.

Allison, L.J. [ed.] [Oak Ridge National Lab., TN (United States). Carbon Dioxide Information Analysis Center; Easterling, D.R.; Jamason, P.; Bowman, D.P.; Hughes, P.Y.; Mason, E.H. [National Oceanic and Atmospheric Administration, Asheville, NC (United States). National Climatic Data Center

1997-02-01T23:59:59.000Z

183

A Gauge-Based Analysis of Daily Precipitation over East Asia  

Science Conference Proceedings (OSTI)

A new gauge-based analysis of daily precipitation has been constructed on a 0.5° latitude–longitude grid over East Asia (5°–60°N, 65°–155°E) for a 26-yr period from 1978 to 2003 using gauge observations at over 2200 stations collected from ...

Pingping Xie; Mingyue Chen; Song Yang; Akiyo Yatagai; Tadahiro Hayasaka; Yoshihiro Fukushima; Changming Liu

2007-06-01T23:59:59.000Z

184

A Homogeneous Record (1896–2006) of Daily Weather and Climate at Mohonk Lake, New York  

Science Conference Proceedings (OSTI)

Reliable, long-term records of daily weather and climate are relatively rare but are crucial for understanding long-term trends and variability in extreme events and other climate metrics that are not resolvable at the monthly time scale. Here, ...

Benjamin I. Cook; Edward R. Cook; Kevin J. Anchukaitis; Paul C. Huth; John E. Thompson; Shanan F. Smiley

2010-03-01T23:59:59.000Z

185

An environmental control HW/SW framework for daily living of elderly and disabled people  

Science Conference Proceedings (OSTI)

A home control system is presented, based on standard IP LAN techniques. The system features large flexibility, dynamic reconfigurability, fault-tolerance and low costs. An integrated hardware/software framework has been conceived, which support device ... Keywords: electronic aids for daily living, remote services, smart homes

Guido Matrella; Ferdinando Grossi; Valentina Bianchi; Ilaria De Munari; Paolo Ciampolini

2008-04-01T23:59:59.000Z

186

The Daily Princetonian -International fusion project will use Princeton physics lab Summer Program  

E-Print Network (OSTI)

to determine the viability of exploiting cold fusion as an energy source around the world. Much of the researchThe Daily Princetonian - International fusion project will use Princeton physics lab Summer Program | Previous | Next | Calendar International fusion project will use Princeton physics lab By ABBY WILLIAMS

187

Space–Time Spectral Analysis of the Southern Hemisphere Daily 500-hPa Geopotential Height  

Science Conference Proceedings (OSTI)

In this paper the authors use the NCEP–Department of Energy (DOE) Reanalysis 2 (NCEP2) data from 1979 to 2004 to expand the daily 500-hPa geopotential height in the Southern Hemisphere (SH, 90°–20°S) into a double Fourier series, and analyze the ...

Cheng Sun; Jianping Li

2012-12-01T23:59:59.000Z

188

Daily Simulation of Ozone and Fine Particulates over New York State: Findings and Challenges  

Science Conference Proceedings (OSTI)

This study investigates the potential utility of the application of a photochemical modeling system in providing simultaneous forecasts of ozone (O3) and fine particulate matter (PM2.5) over New York State. To this end, daily simulations from the ...

C. Hogrefe; W. Hao; K. Civerolo; J.-Y. Ku; G. Sistla; R. S. Gaza; L. Sedefian; K. Schere; A. Gilliland; R. Mathur

2007-07-01T23:59:59.000Z

189

Daily Reporting Rainfall Station DON & PROSERPINE RIVERS Manual Heavy Rainfall Station  

E-Print Network (OSTI)

Daily Reporting Rainfall Station DON & PROSERPINE RIVERS Manual Heavy Rainfall Station Manual River Station Telemetry Rainfall Station Telemetry River Station Revised: Nov 2009 MAP 121.1 FLOOD WARNING Bowen Tide TM Bowen P/S AL GretaCk Peter Faust Dam Crystal Brook Andromache R GoorgangaCk Jocheims TM

Greenslade, Diana

190

Why should I recycle? The average American generates 4.5 pounds of waste daily.  

E-Print Network (OSTI)

Why should I recycle? The average American generates 4.5 pounds of waste daily. Instead of throwing throughout campus.These guidelines will help you recycle more and waste less. What's recyclable? · Mixed and plastic-coated papers · Tissue and paper towels · Paper or containers soiled by food or organic waste

Tsien, Roger Y.

191

Biomass burning emission inventory with daily resolution: Application to aircraft observations of Asian outflow  

E-Print Network (OSTI)

Biomass burning emission inventory with daily resolution: Application to aircraft observations for biomass burning using AVHRR satellite observations of fire activity corrected for data gaps and scan angle biomass burning in SE Asia was a major contributor to the outflow of Asian pollution observed in TRACE

Palmer, Paul

192

The development of a regional geomagnetic daily variation model using neural networks  

E-Print Network (OSTI)

The development of a regional geomagnetic daily variation model using neural networks P. R. Sutclie: 28 June 1999 / Accepted: 20 July 1999 Abstract. Global and regional geomagnetic ®eld models give the components of the geomagnetic ®eld as func- tions of position and epoch; most utilise a polynomial or Fourier

Paris-Sud XI, Université de

193

A computational intelligence scheme for the prediction of the daily peak load  

Science Conference Proceedings (OSTI)

Forecasting of future electricity demand is very important for decision making in power system operation and planning. In recent years, due to privatization and deregulation of the power industry, accurate electricity forecasting has become an important ... Keywords: Computational intelligence, Daily peak load, Mid-term load forecasting, Self-organizing map, Support vector machine

Jawad Nagi; Keem Siah Yap; Farrukh Nagi; Sieh Kiong Tiong; Syed Khaleel Ahmed

2011-12-01T23:59:59.000Z

194

Spectroscopy of transient neutral species via negative ion photoelectron spectroscopy  

SciTech Connect

Negative ion photoelectron spectroscopy has been used to study two types of transient neutral species: bound free radicals (NO{sub 2} and NO{sub 3}) and unstable neutral species ((IHI) and (FH{sub 2})). The negative ion time-of-flight photoelectron spectrometer used for these experiments is described in detail.

Weaver, A.

1991-12-01T23:59:59.000Z

195

Spectroscopy of transient neutral species via negative ion photoelectron spectroscopy  

Science Conference Proceedings (OSTI)

Negative ion photoelectron spectroscopy has been used to study two types of transient neutral species: bound free radicals (NO{sub 2} and NO{sub 3}) and unstable neutral species ([IHI] and [FH{sub 2}]). The negative ion time-of-flight photoelectron spectrometer used for these experiments is described in detail.

Weaver, A.

1991-12-01T23:59:59.000Z

196

On Negative Unfolding in the Answer Set Semantics  

Science Conference Proceedings (OSTI)

We study negative unfolding for logic programs from a viewpoint of preservation of the answer set semantics. To this end, we consider negative unfolding in terms of nested expressions by Lifschitz et al., and regard it as a combination of the replacement ...

Hirohisa Seki

2009-03-01T23:59:59.000Z

197

A cyclic time-dependent Markov process to model daily patterns in wind turbine power production  

E-Print Network (OSTI)

Wind energy is becoming a top contributor to the renewable energy mix, which raises potential reliability issues for the grid due to the fluctuating nature of its source. To achieve adequate reserve commitment and to promote market participation, it is necessary to provide models that can capture daily patterns in wind power production. This paper presents a cyclic inhomogeneous Markov process, which is based on a three-dimensional state-space (wind power, speed and direction). Each time-dependent transition probability is expressed as a Bernstein polynomial. The model parameters are estimated by solving a constrained optimization problem: The objective function combines two maximum likelihood estimators, one to ensure that the Markov process long-term behavior reproduces the data accurately and another to capture daily fluctuations. A convex formulation for the overall optimization problem is presented and its applicability demonstrated through the analysis of a case-study. The proposed model is capable of r...

Scholz, Teresa; Estanqueiro, Ana

2013-01-01T23:59:59.000Z

198

Negative heat capacities and first order phase transitions in nuclei  

E-Print Network (OSTI)

Anomalous negative heat capacities have been claimed as indicators of first order phase transitions in finite systems in general, and fornuclear systems in particular. A thermodynamic approach allowing for all Q value terms is used to evaluate heat capacities in finitevan der Waals fluids and finite lattice systems in the coexistence region. Fictitious large effects and negative heat capacities are observed in lattice systems when periodic boundary conditions are introduced. Small anomalous effects are predicted for small drops and for finite lattice systems. A straightforward application of the analysis to nuclei shows that negative heat capacities cannot be observed for A>60.

L. G. Moretto; J. B. Elliott; L. Phair; G. J. Wozniak

2002-08-13T23:59:59.000Z

199

Noise reduction in negative-ion quadrupole mass spectrometry  

DOE Patents (OSTI)

This invention is comprised of a quadrupole mass spectrometer (QMS) system having an ion source, quadrupole mass filter, and ion collector/recorder system. A weak, transverse magnetic field and an electron collector are disposed between the quadrupole and ion collector. When operated in negative ion mode, the ion source produces a beam of primarily negatively-charged particles from a sample, including electrons as well as ions. The beam passes through the quadrupole and enters the magnetic field, where the electrons are deflected away from the beam path to the electron collector. The negative ions pass undeflected to the ion collector where they are detected and recorded as a mass spectrum.

Chastagner, P.

1991-12-31T23:59:59.000Z

200

Query on Negative Temperature, Internal Interactions and Decrease of Entropy  

E-Print Network (OSTI)

After negative temperature is restated, we find that it will derive necessarily decrease of entropy. Negative temperature is based on the Kelvin scale and the condition dU>0 and dS0. But, negative temperature is contradiction with usual meaning of temperature and with some basic concepts of physics and mathematics. It is a question in nonequilibrium thermodynamics. We proposed a possibility of decrease of entropy due to fluctuation magnified and internal interactions in some isolated systems. From this we discuss some possible examples and theories.

Yi-Fang Chang

2007-04-16T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Prediction of clock time hourly global radiation from daily values over  

Open Energy Info (EERE)

Prediction of clock time hourly global radiation from daily values over Prediction of clock time hourly global radiation from daily values over Bangladesh Dataset Summary Description (Abstract): A need for predicting hourly global radiation exists for many locations particularly in Bangladesh for which measured values are not available and daily values have to be estimated from sunshine data. The CPRG model has been used to predict values of hourly Gh for Dhaka (23.770N, 90.380E), Chittagong (22.270N, 91.820E) and Bogra (24.850N, 89.370E) for = ±7.50, ±22.50, ±37.50, ±52.50, ±67.50, ±82.50 and ±97.50 i.e., for ±1/2, ±3/2, ±5/2, ±7/2, ±9/2, ±11/2, ±13/2 hours before and after solar noon and the computed values for different months are symmetrical about solar noon whereas for many months experimental data show a clear asymmetry. To obtain improved

202

Daily Thermal Predictions of the AGR-1 Experiment with Gas Gaps Varying with Time  

SciTech Connect

A new daily as-run thermal analysis was performed at the Idaho National Laboratory on the Advanced Gas Reactor (AGR) test experiment number one at the Advanced Test Reactor (ATR). This thermal analysis incorporates gas gaps changing with time during the irradiation experiment. The purpose of this analysis was to calculate the daily average temperatures of each compact to compare with experimental results. Post irradiation examination (PIE) measurements of the graphite holder and fuel compacts showed the gas gaps varying from the beginning of life. The control temperature gas gap and the fuel compact – graphite holder gas gaps were linearly changed from the original fabrication dimensions, to the end of irradiation measurements. A steady-state thermal analysis was performed for each daily calculation. These new thermal predictions more closely match the experimental data taken during the experiment than previous analyses. Results are presented comparing normalized compact average temperatures to normalized log(R/B) Kr-85m. The R/B term is the measured release rate divided by the predicted birth rate for the isotope Kr-85m. Correlations between these two normalized values are presented.

Grant Hawkes; James Sterbentz; John Maki; Binh Pham

2012-06-01T23:59:59.000Z

203

Negative Polaron and Triplet Exciton Diffusion in Molecular Wires  

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

R. Miller, and Kirk S. Schanze J. Am. Chem. Soc. 133, 11289-11298 (2011). Find paper at ACS Publications Abstract: The dynamics of negative polaron and triplet exciton transport...

204

Comments on “Current GCMs’ Unrealistic Negative Feedback in the Arctic”  

Science Conference Proceedings (OSTI)

Contrasting our expectation of a positive lapse-rate feedback associated with the Arctic inversion, Boé et al. (2009) report that strong present-day Arctic temperature inversions are associated with stronger negative longwave feedbacks and thus ...

Felix Pithan; Thorsten Mauritsen

205

Active negative-index metamaterial powered by an electron beam  

E-Print Network (OSTI)

An active negative index metamaterial that derives its gain from an electron beam is introduced. The metamaterial consists of a stack of equidistant parallel metal plates perforated by a periodic array of holes shaped as ...

Shapiro, Michael

206

Comments on “Current GCMs' Unrealistic Negative Feedback in the Arctic”  

Science Conference Proceedings (OSTI)

In contrast to prior studies showing a positive lapse-rate feedback associated with the Arctic inversion, Boé et al. reported that strong present-day Arctic temperature inversions are associated with stronger negative longwave feedbacks and thus ...

Felix Pithan; Thorsten Mauritsen

2013-10-01T23:59:59.000Z

207

German noch so: scalar degree operator and negative polarity item  

Science Conference Proceedings (OSTI)

This paper describes a puzzle introduced by German noch so, a degree operator and Negative Polarity Item. Noch so sentences allow for paraphrases containing a scalar particle (like even), suggesting that its polarity sensitivity can receive an analysis ...

Bernhard Schwarz

2009-12-01T23:59:59.000Z

208

Negative Energy: Why Interdisciplinary Physics Requires Multiple Ontologies  

E-Print Network (OSTI)

Much recent work in physics education research has focused on ontological metaphors for energy, particularly the substance ontology and its pedagogical affordances. The concept of negative energy problematizes the substance ontology for energy, but in many instructional settings, the specific difficulties around negative energy are outweighed by the general advantages of the substance ontology. However, we claim that our interdisciplinary setting (a physics class that builds deep connections to biology and chemistry) leads to a different set of considerations and conclusions. In a course designed to draw interdisciplinary connections, the centrality of chemical bond energy in biology necessitates foregrounding negative energy from the beginning. We argue that the emphasis on negative energy requires a combination of substance and location ontologies. The location ontology enables energies both "above" and "below" zero. We present preliminary student data that illustrate difficulties in reasoning about negativ...

Dreyfus, Benjamin W; Gouvea, Julia; Sawtelle, Vashti; Turpen, Chandra; Redish, Edward F

2013-01-01T23:59:59.000Z

209

Negative correlation learning and the ambiguity family of ensemble methods  

Science Conference Proceedings (OSTI)

We study the formal basis behind Negative Correlation (NC) Learning, an ensemble technique developed in the evolutionary computation literature. We show that by removing an assumption made in the original work, NC can be shown to be a derivative technique ...

Gavin Brown; Jeremy Wyatt

2003-06-01T23:59:59.000Z

210

Abnormal Negative Sequence Analysis Excel Application Version 1.0  

Science Conference Proceedings (OSTI)

The Abnormal Negative Sequence Analysis Excel Application can be used to estimate the likely impact of any electrical event on the generator rotor so that a quick informed decision can be made about generator rotor inspection. This project is intended to develop an Excel based application that can be used for assessing the need for turbine generators to be inspected after an abnormal negative sequence or motoring from standstill event may have occurred. Microsoft2000, XP, and Vista running either Micros...

2010-11-29T23:59:59.000Z

211

High brilliance negative ion and neutral beam source  

DOE Patents (OSTI)

A high brilliance mass selected (Z-selected) negative ion and neutral beam source having good energy resolution. The source is based upon laser resonance ionization of atoms or molecules in a small gaseous medium followed by charge exchange through an alkali oven. The source is capable of producing microampere beams of an extremely wide variety of negative ions, and milliampere beams when operated in the pulsed mode.

Compton, R.N.

1990-01-03T23:59:59.000Z

212

Negative ion source with low temperature transverse divergence optical system  

DOE Patents (OSTI)

A negative ion source is provided which has extremely low transverse divergence as a result of a unique ion focusing system in which the focal line of an ion beam emanating from an elongated, concave converter surface is outside of the ion exit slit of the source and the path of the exiting ions. The beam source operates with a minimum ion temperature which makes possible a sharply focused (extremely low transverse divergence) ribbon like negative ion beam.

Whealton, J.H.; Stirling, W.L.

1985-03-04T23:59:59.000Z

213

Transformation-optics generalization of tunnelling effects in bi-layers made of paired epsilon-negative/mu-negative media  

E-Print Network (OSTI)

Transformation-media designed by standard transformation-optics (TO) approaches, based on real-valued coordinate-mapping, cannot exhibit single-negative (SNG) character unless such character is already possessed by the domain that is being transformed. In this paper, we show that SNG transformation media can be obtained by transforming a domain featuring double positive (or double-negative) character, via complex analytic continuation of the coordinate transformation rules. Moreover, we apply this concept to the TO-based interpretation of phenomena analogous to the tunnelling effects observable in bilayers made of complementary epsilon-negative (ENG) and mu-negative (MNG) media, and explore their possible TO-inspired extensions and generalizations.

Castaldi, Giuseppe; Galdi, Vincenzo; Alu', Andrea; Engheta, Nader

2010-01-01T23:59:59.000Z

214

A method to estimate the effect of deformable image registration uncertainties on daily dose mapping  

Science Conference Proceedings (OSTI)

Purpose: To develop a statistical sampling procedure for spatially-correlated uncertainties in deformable image registration and then use it to demonstrate their effect on daily dose mapping. Methods: Sequential daily CT studies are acquired to map anatomical variations prior to fractionated external beam radiotherapy. The CTs are deformably registered to the planning CT to obtain displacement vector fields (DVFs). The DVFs are used to accumulate the dose delivered each day onto the planning CT. Each DVF has spatially-correlated uncertainties associated with it. Principal components analysis (PCA) is applied to measured DVF error maps to produce decorrelated principal component modes of the errors. The modes are sampled independently and reconstructed to produce synthetic registration error maps. The synthetic error maps are convolved with dose mapped via deformable registration to model the resulting uncertainty in the dose mapping. The results are compared to the dose mapping uncertainty that would result from uncorrelated DVF errors that vary randomly from voxel to voxel. Results: The error sampling method is shown to produce synthetic DVF error maps that are statistically indistinguishable from the observed error maps. Spatially-correlated DVF uncertainties modeled by our procedure produce patterns of dose mapping error that are different from that due to randomly distributed uncertainties. Conclusions: Deformable image registration uncertainties have complex spatial distributions. The authors have developed and tested a method to decorrelate the spatial uncertainties and make statistical samples of highly correlated error maps. The sample error maps can be used to investigate the effect of DVF uncertainties on daily dose mapping via deformable image registration. An initial demonstration of this methodology shows that dose mapping uncertainties can be sensitive to spatial patterns in the DVF uncertainties.

Murphy, Martin J.; Salguero, Francisco J.; Siebers, Jeffrey V.; Staub, David; Vaman, Constantin [Department of Radiation Oncology, Virginia Commonwealth University, Richmond Virginia 23298 (United States)

2012-02-15T23:59:59.000Z

215

Predicted daily and yearly average radiative performance of hyperbolic spiral solar concentrators  

SciTech Connect

Some possible applications of solar energy, such as absorption cooling and air conditioning, process heating and preheating unconventional power production systems, require heat at temperatures higher than those associated with flat plate collectors, but below those associated with focussing collectors. Such a level of collection temperatures is economically obtained using non-imaging solar collectors. They are non-focussing, moderate concentrating ratio and trough-like collectors, which are usually arranged east-west, facing south or north. One of these concentrators is the hyperbolic spiral collector, which may be a semi- or compound one. It has been shown that the optical characteristics of semi- and compound hyperbolic spiral concentrators (SHSC and CHSC) are better than those of the compound parabolic one. In this work, the instantaneous radiative performance of both semi- and compound hyperbolic spiral concentrators are extended to average daily and yearly performance. Concentrators of various angles of acceptance are used in the analysis. Its effect upon the daily and yearly performance of the concentrator is discussed. The performance is also studied for various tilt adjustment routines. The results show that the number of tilt adjustments per year is an important factor affecting the daily and yearly performance of both SHSC and CHSC. It has been found that the SHSC is more affected by tilt adjustments than the compound one. The results also indicate that concentrators of small angle of acceptance are much affected by the number of adjustments. The results also show that there is not much difference between weekly and monthly adjustments.

Rabie, L.H.

1983-12-01T23:59:59.000Z

216

Electron energy recovery system for negative ion sources  

DOE Patents (OSTI)

An electron energy recovery system for negative ion sources is provided. The system, employing crossed electric and magnetic fields, separates the electrons from the ions as they are extracted from the ion source plasma generator and before the ions are accelerated to their full energy. With the electric and magnetic fields oriented 90/sup 0/ to each other, the electrons remain at approximately the electrical potential at which they were generated. The electromagnetic forces cause the ions to be accelerated to the full accelerating supply voltage energy while being deflected through an angle of less than 90/sup 0/. The electrons precess out of the accelerating field region into an electron recovery region where they are collected at a small fraction of the full accelerating supply energy. It is possible, by this method, to collect > 90% of the electrons extracted along with the negative ions from a negative ion source beam at < 4% of full energy.

Dagenhart, W.K.; Stirling, W.L.

1979-10-25T23:59:59.000Z

217

Negative ion-based neutral injection on DIII-D  

SciTech Connect

High energy negative ion-based neutral beam injection is a strong candidate for heating and non-inductive current drive in tokamaks. Many of the questions related to the physics and engineering of this technique remain unanswered. In this paper, we consider the possibility of negative ion-based neutral beam injection on DIII-D. We establish the desired parameter space by examining physics trades. This is combined with potential design constraints and a survey of component technology options to establish an injector concept. Injector performance is estimated assuming particular component technologies, and concept flexibility with respect to incorporating alternate technologies is described. 9 refs., 6 figs., 4 tabs.

Stewart, L.D.; Bhadra, D.K.; Colleraine, A.P.; Kim, J.

1990-01-01T23:59:59.000Z

218

Bimolecular reaction dynamics from photoelectron spectroscopy of negative ions  

DOE Green Energy (OSTI)

The transition state region of a neutral bimolecular reaction may be experimentally investigated by photoelectron spectroscopy of an appropriate negative ion. The photoelectron spectrum provides information on the spectroscopy and dynamics of the short lived transition state and may be used to develop model potential energy surfaces that are semi-quantitative in this important region. The principles of bound [yields] bound negative ion photoelectron spectroscopy are illustrated by way of an example: a full analysis of the photoelectron bands of CN[sup [minus

Bradforth, S.E.

1992-11-01T23:59:59.000Z

219

Imploding and exploding shocks in negative ion degenerate plasmas  

SciTech Connect

Imploding and exploding shocks are studied in nonplanar geometries for negative ion degenerate plasma. Deformed Korteweg de Vries Burgers (DKdVB) equation is derived by using reductive perturbation method. Two level finite difference scheme is used for numerical analysis of DKdVB. It is observed that compressive and rarefactive shocks are observed depending on the value of quantum parameter. The effects of temperature, kinematic viscosity, mass ratio of negative to positive ions and quantum parameter on diverging and converging shocks are presented.

Hussain, S.; Akhtar, N. [Theoretical Plasma Physics Division, PINSTECH, Nilore, Islamabad 44000 (Pakistan); Department of Physics and Applied Mathematics PIEAS, Nilore, Islamabad 44000 (Pakistan)

2011-08-15T23:59:59.000Z

220

EIA - Daily Report 9/13/05 - Hurricane Katrina's Impact on U.S. Oil &  

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

Tuesday, September 13, 4:00 pm Tuesday, September 13, 4:00 pm According to the Minerals Management Service (MMS), as of 11:30 September 12, Gulf of Mexico oil production was reduced by 846,720 barrels per day as a result of Hurricane Katrina, equivalent to 56.45 percent of daily Gulf of Mexico oil production (which had been1.5 million barrels per day). The MMS also reported that 3.720 billion cubic feet per day of natural gas production was shut in, equivalent to 37.20 percent of daily Gulf of Mexico natural gas production (which had been 10 billion cubic feet per day). EIA released its monthly Short-Term Energy Outlook on Wednesday, September 7. Because considerable uncertainty remains regarding the extent of Katrina's damage, EIA established three basic recovery scenarios to represent a range of plausible outcomes for oil and natural gas supply over the next several months and through 2006: (1) Fast Recovery, which assumes a very favorable set of circumstances for getting supplies back to normal; (2) Slow Recovery, which assumes that significant outages in oil and natural gas production and delivery from the Gulf area continue at least into November; and (3) Medium Recovery, which assumes a path in between Slow and Fast Recovery.

Note: This page contains sample records for the topic "negative daily imbalances" 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

EIA - Daily Report 9/15/05 - Hurricane Katrina's Impact on U.S. Oil &  

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

Thursday, September 15, 3:00 pm Thursday, September 15, 3:00 pm According to the Minerals Management Service (MMS), as of 11:30 September 15, Gulf of Mexico oil production was reduced by 842,091 barrels per day as a result of Hurricane Katrina, equivalent to 56.14 percent of daily Gulf of Mexico oil production (which had been 1.5 million barrels per day). The MMS also reported that 3.411 billion cubic feet per day of natural gas production was shut in, equivalent to 34.11 percent of daily Gulf of Mexico natural gas production (which had been 10 billion cubic feet per day). EIA released its monthly Short-Term Energy Outlook on Wednesday, September 7, taking into consideration three Hurricane Katrina recovery scenarios. Petroleum As of the close of trading on Thursday, September 15, crude oil and petroleum product prices were lower, compared to the closing prices from Wednesday, September 14. The gasoline near-month futures price was down by 3.9 cents per gallon from Wednesday, settling at 189.9 cents per gallon, while the heating oil near-month futures price was down 1.3 cents per gallon, settling at 191.2 cents per gallon. The NYMEX West Texas Intermediate (WTI) crude oil futures price was down $0.34 per barrel from Wednesday, settling at $64.75.

222

The correlation of 27 day period solar activity and daily maximum temperature in continental Australia  

E-Print Network (OSTI)

We report the first observation of a 27 day period component in daily maximum temperature recorded at widely spaced locations in Australia. The 27 day component, extracted by band pass filtering, is correlated with the variation of daily solar radio flux during years close to solar minimum. We demonstrate that the correlation is related to the emergence of regions of solar activity on the Sun separated, temporally, from the emergence of other active regions. In this situation, which occurs only near solar minimum, the observed 27 day variation of temperature can be in phase or out of phase with the 27 day variation of solar activity. During solar maximum correlation of temperature and solar activity is much less defined. The amplitude of the 27 day temperature response to solar activity is large, at times as high as 6 degrees C, and much larger than the well documented temperature response to the 11 year cycle of solar activity. We demonstrate that the 27 day temperature response is localised to the Australia...

Edmonds, Ian

2013-01-01T23:59:59.000Z

223

Real-Time Study of Prostate Intrafraction Motion During External Beam Radiotherapy With Daily Endorectal Balloon  

Science Conference Proceedings (OSTI)

Purpose: To prospectively investigate intrafraction prostate motion during radiofrequency-guided prostate radiotherapy with implanted electromagnetic transponders when daily endorectal balloon (ERB) is used. Methods and Materials: Intrafraction prostate motion from 24 patients in 787 treatment sessions was evaluated based on three-dimensional (3D), lateral, cranial-caudal (CC), and anterior-posterior (AP) displacements. The mean percentage of time with 3D, lateral, CC, and AP prostate displacements >2, 3, 4, 5, 6, 7, 8, 9, and 10 mm in 1 minute intervals was calculated for up to 6 minutes of treatment time. Correlation between the mean percentage time with 3D prostate displacement >3 mm vs. treatment week was investigated. Results: The percentage of time with 3D prostate movement >2, 3, and 4 mm increased with elapsed treatment time (p 5 mm was independent of elapsed treatment time (p = 0.11). The overall mean time with prostate excursions >3 mm was 5%. Directional analysis showed negligible lateral prostate motion; AP and CC motion were comparable. The fraction of time with 3D prostate movement >3 mm did not depend on treatment week of (p > 0.05) over a 4-minute mean treatment time. Conclusions: Daily endorectal balloon consistently stabilizes the prostate, preventing clinically significant displacement (>5 mm). A 3-mm internal margin may sufficiently account for 95% of intrafraction prostate movement for up to 6 minutes of treatment time. Directional analysis suggests that the lateral internal margin could be further reduced to 2 mm.

Both, Stefan, E-mail: Stefan.Both@uphs.upenn.edu [Department of Radiation Oncology, Hospital of University of Pennsylvania, Philadelphia, PA (United States); Wang, Ken Kang-Hsin; Plastaras, John P.; Deville, Curtiland; Bar Ad, Voika; Tochner, Zelig; Vapiwala, Neha [Department of Radiation Oncology, Hospital of University of Pennsylvania, Philadelphia, PA (United States)

2011-12-01T23:59:59.000Z

224

EIA - Daily Report 9/12/05 - Hurricane Katrina's Impact on U.S. Oil &  

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

2, 5:00 pm 2, 5:00 pm According to the Minerals Management Service (MMS), as of 11:30 September 12, Gulf of Mexico oil production was reduced by 860,636 barrels per day as a result of Hurricane Katrina, equivalent to 57.38 percent of daily Gulf of Mexico oil production (which is 1.5 million barrels per day). The MMS also reported that 3.784 billion cubic feet per day of natural gas production was shut in, equivalent to 37.84 percent of daily Gulf of Mexico natural gas production (which is 10 billion cubic feet per day). EIA released its monthly Short-Term Energy Outlook on Wednesday, September 7. Because considerable uncertainty remains regarding the extent of Katrina's damage, EIA established three basic recovery scenarios to represent a range of plausible outcomes for oil and natural gas supply over the next several months and through 2006: (1) Fast Recovery, which assumes a very favorable set of circumstances for getting supplies back to normal; (2) Slow Recovery, which assumes that significant outages in oil and natural gas production and delivery from the Gulf area continue at least into November; and (3) Medium Recovery, which assumes a path in between Slow and Fast Recovery.

225

Climate Variability and the Shape of Daily Precipitation: A Case Study of ENSO and the American West  

Science Conference Proceedings (OSTI)

Characterizing the relationship between large-scale atmospheric circulation patterns and the shape of the daily precipitation distribution is fundamental to understanding how dynamical changes are manifest in the hydrological cycle, and it is also ...

Nicole Feldl; Gerard H. Roe

2011-05-01T23:59:59.000Z

226

The Simulation of Daily Temperature Time Series from GCM Output. Part I: Comparison of Model Data with Observations  

Science Conference Proceedings (OSTI)

For climate change impact analyses, local scenarios of surface variables at the daily scales are frequently required. Empirical transfer functions are a widely used technique to generate scenarios from GCM data at these scales. For successful ...

J. P. Palutikof; J. A. Winkler; C. M. Goodess; J. A. Andresen

1997-10-01T23:59:59.000Z

227

Daily Mean Sea Level Pressure Reconstructions for the European–North Atlantic Region for the Period 1850–2003  

Science Conference Proceedings (OSTI)

The development of a daily historical European–North Atlantic mean sea level pressure dataset (EMSLP) for 1850–2003 on a 5° latitude by longitude grid is described. This product was produced using 86 continental and island stations distributed ...

T. J. Ansell; P. D. Jones; R. J. Allan; D. Lister; D. E. Parker; M. Brunet; A. Moberg; J. Jacobeit; P. Brohan; N. A. Rayner; E. Aguilar; H. Alexandersson; M. Barriendos; T. Brandsma; N. J. Cox; P. M. Della-Marta; A. Drebs; D. Founda; F. Gerstengarbe; K. Hickey; T. Jónsson; J. Luterbacher; Ø. Nordli; H. Oesterle; M. Petrakis; A. Philipp; M. J. Rodwell; O. Saladie; J. Sigro; V. Slonosky; L. Srnec; V. Swail; A. M. García-Suárez; H. Tuomenvirta; X. Wang; H. Wanner; P. Werner; D. Wheeler; E. Xoplaki

2006-06-01T23:59:59.000Z

228

Combined Effects of the Southern Oscillation Index and the Pacific Decadal Oscillation on a Stochastic Daily Precipitation Model  

Science Conference Proceedings (OSTI)

The combined effects of the Southern Oscillation index (SOI) and the Pacific decadal oscillation (PDO) on a second-order Markov chain mixed exponential daily precipitation model were determined for 15 stations in Nevada, Arizona, New Mexico, and ...

David A. Woolhiser

2008-03-01T23:59:59.000Z

229

APHRODITE: Constructing a Long-Term Daily Gridded Precipitation Dataset for Asia Based on a Dense Network of Rain Gauges  

Science Conference Proceedings (OSTI)

A daily gridded precipitation dataset covering a period of more than 57 yr was created by collecting and analyzing rain gauge observation data across Asia through the activities of the Asian Precipitation—Highly Resolved Observational Data Integration ...

Akiyo Yatagai; Kenji Kamiguchi; Osamu Arakawa; Atsushi Hamada; Natsuko Yasutomi; Akio Kitoh

2012-09-01T23:59:59.000Z

230

Development of Hourly Meteorological Values From Daily Data and Significance to Hydrological Modeling at H. J. Andrews Experimental Forest  

Science Conference Proceedings (OSTI)

Hydrologic modeling depends on having quality meteorological input available at the simulation time step. Often two needs arise: disaggregation from daily to subdaily and extend an available subdaily record. Simple techniques were tested for ...

Scott R. Waichler; Mark S. Wigmosta

2003-04-01T23:59:59.000Z

231

High-Resolution Spatial Modeling of Daily Weather Elements for a Catchment in the Oregon Cascade Mountains, United States  

Science Conference Proceedings (OSTI)

High-quality, daily meteorological data at high spatial resolution are essential for a variety of hydrologic and ecological modeling applications that support environmental risk assessments and decision making. This paper describes the ...

Christopher Daly; Jonathan W. Smith; Joseph I. Smith; Robert B. McKane

2007-10-01T23:59:59.000Z

232

The Relationship between Meteorological Parameters and Daily Summer Rainfall Amount and Coverage in West-Central Florida  

Science Conference Proceedings (OSTI)

Considerable daily variations of summer convective rainfall average areal coverage and rainfall amount were identified in west-central Florida for the period May–September 1997–2000 using a 29-site rainfall network. Pearson correlation ...

Ira S. Brenner

2004-04-01T23:59:59.000Z

233

Monte Carlo Simulation of Daily Regional Sulfur Distribution: Comparison with SURE Sulfate Data and Visual Range Observations during August 1977  

Science Conference Proceedings (OSTI)

The daily distribution of sulfate concentration over the eastern United States during August 1977 is simulated by a Monte Carlo model using quantized emissions, positioned in accordance with the 1973 EPA SO2 emission inventory. Horizontal ...

D. E. Patterson; R. B. Husar; W. E. Wilson; L. F. Smith

1981-04-01T23:59:59.000Z

234

Use of WindSat to Extend a Microwave-Based Daily Optimum Interpolation Sea Surface Temperature Time Series  

Science Conference Proceedings (OSTI)

The NOAA ¼° daily optimum interpolation sea surface temperature analysis (DOISST) is available either as a 31-yr (from 1981 onward) time series based on Advanced Very High Resolution Radiometer (AVHRR) observations or as a 9-yr (2002–11) time ...

Viva F. Banzon; Richard W. Reynolds

2013-04-01T23:59:59.000Z

235

Statistical Predictability and Parametric Models of Daily Ambient Temperature and Solar Irradiance: An Analysis in the Italian Climate  

Science Conference Proceedings (OSTI)

Stochastic–dynamic models are discussed for both air temperature and solar irradiance daily time series in the Italian climate. Most of the methodologies discussed in this paper are well known and established for processes having a Gaussian ...

U. Amato; V. Cuomo; F. Fontana; C. Serio

1989-08-01T23:59:59.000Z

236

Time Series of Daily Averaged Cloud Fractions over Landfast First-Year Sea Ice from Multiple Data Sources  

Science Conference Proceedings (OSTI)

The time series of daily averaged cloud fractions (CFs) collected from different platforms—two Moderate Resolution Imaging Spectroradiometer (MODIS) instruments on Terra and Aqua satellites, the National Centers for Environmental Prediction (NCEP)...

Xin Jin; John M. Hanesiak; David G. Barber

2007-11-01T23:59:59.000Z

237

Interpolation of 1961–97 Daily Temperature and Precipitation Data onto Alberta Polygons of Ecodistrict and Soil Landscapes of Canada  

Science Conference Proceedings (OSTI)

Soil quality models developed for ecodistrict polygons (EDP) and the polygons of the soil landscapes of Canada (SLC) to monitor the concentration of soil organic matter require daily climate data as an important input. The objectives of this ...

Samuel S. P. Shen; Peter Dzikowski; Guilong Li; Darren Griffith

2001-12-01T23:59:59.000Z

238

A Synoptic Weather-Typing Approach to Project Future Daily Rainfall and Extremes at Local Scale in Ontario, Canada  

Science Conference Proceedings (OSTI)

This paper attempts to project possible changes in the frequency of daily rainfall events late in this century for four selected river basins (i.e., Grand, Humber, Rideau, and Upper Thames) in Ontario, Canada. To achieve this goal, automated ...

Chad Shouquan Cheng; Guilong Li; Qian Li; Heather Auld

2011-07-01T23:59:59.000Z

239

A Synoptic Weather Typing Approach to Simulate Daily Rainfall and Extremes in Ontario, Canada: Potential for Climate Change Projections  

Science Conference Proceedings (OSTI)

An automated synoptic weather typing and stepwise cumulative logit/nonlinear regression analyses were employed to simulate the occurrence and quantity of daily rainfall events. The synoptic weather typing was developed using principal component ...

Chad Shouquan Cheng; Guilong Li; Qian Li; Heather Auld

2010-05-01T23:59:59.000Z

240

Comparison of the prediction accuracy of daily and monthly regression models for energy consumption in commercial buildings  

E-Print Network (OSTI)

The measured energy savings from retrofits in commercial buildings are generally determined as the difference between the energy consumption predicted using a baseline model and the measured energy consumption during the post retrofit period. Most baseline models are developed by regressing the daily energy consumption versus the daily average temperature (daily models) or by regressing the monthly energy consumption versus the monthly average temperature (monthly models). Since the post-retrofit weather is generally different from the weather used for model development, the prediction error of the baseline model may be different from the fitting error. Daily and monthly baseline models were developed for a midsize commercial building with (i) dual-duct CAV and VAV systems, (ii) office and university occupancy schedules, and (iii) different operating practices using the weather of a mild weather year. The prediction errors were identified as the difference between the energy use predicted by the regression models and the values simulated by a calibrated simulation program when both models use weather from a year very different from the weather year used to develop the regression model. The major results are summarized below: 1. When the AHUs operate 24 hours per day, annual energy prediction errors of daily regression models were found to be less than 1.4%. The errors of monthly regression models were found to be in the same range as the error of the daily models. 2. When the AHUs were shut down during unoccupied periods, annual prediction errors for both daily and monthly regression models were as high as 15%. However, the prediction error of daily regression models can be decreased to a range of 2% to 3% if the daily average energy consumption is regressed versus the average temperature during the operation period. Based on these findings, we suggest use of daily or monthly regression models when the AHUs are operated 24 hours per day. When shut-down is performed during unoccupied hours, daily energy consumption should be regressed versus the average ambient temperature during operating hours to develop the baseline model.

Wang, Jinrong

1996-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Harold Black and the Negative-Feedback Amplifier  

E-Print Network (OSTI)

Harold Black and the Negative-Feedback Amplifier n August 2, 1927,Harold 0Black, a young Bell Labs- cated on West Street in Man- hattan.) Black recalled, "I felt an urge to write but had noth- ing of the newspaper pages used by Black tojot down his early ideas on feedbad (Photo:AT&T Archives) The author

Oriolo, Giuseppe

242

Mortgage Debt Overhang: Reduced Investment by Homeowners with Negative Equity  

E-Print Network (OSTI)

[Do not cite without author’s permission] Homeowners with negative equity have less incentive to invest in their property. They face a debt overhang: in expectation, some value created by equity investments in the property will go to the lender. Using rich microdata on household expenditures, I show that debt overhang plays an important role in household financial decisions. I find that homeowners with negative equity cut back substantially on mortgage principal payments, home improvements and home maintenance spending. At the same time, these households show no difference in durable spending on automobiles, furniture and home appliances, investments that are not attached to the home. The decline in mortgage principal payments is particularly large for negative equity homeowners in non-recourse states, where strategic default is more likely because lenders have limited claim on non-housing wealth. Debt overhang, rather than financial constraints, best explains this set of facts. Given the prevalence of negative home equity in today’s housing market, the results suggest that home prices will grow more slowly in the future because of underinvestment. In addition, the potential deadweight loss due to home foreclosures is only part

Brian T. Melzer

2010-01-01T23:59:59.000Z

243

Cesium Delivery System for Negative Ion Source at IPR  

Science Conference Proceedings (OSTI)

The technique of surface production of negative ions using cesium, Cs, has been efficiently exploited over the years for producing negative ion beams with increased current densities from negative ion sources used on neutral beam lines. Deposition of Cs on the source walls and the plasma grid lowers the work function and therefore enables a higher yield of H{sup -}, when hydrogen particles (H and/or H{sub x}{sup +}) strike these surfaces.A single driver RF based (100 kW, 1 MHz) negative ion source test bed, ROBIN, is being set up at IPR under a technical collaboration between IPR and IPP, Germany. The optimization of the Cs oven design to be used on this facility as well as multidriver sources is underway. The characterization experiments of such a Cs delivery system with a 1 g Cs inventory have been carried out using surface ionization technique. The experiments have been carried by delivering Cs into a vacuum chamber without plasma. The linear motion of the surface ionization detector, SID, attached with a linear motion feedthrough allows measuring the angular distribution of the Cs coming out of the oven. Based on the experimental results, a Cs oven for ROBIN has been proposed. The Cs oven design and experimental results of the prototype Cs oven are reported and discussed in the paper.

Bansal, G.; Pandya, K.; Soni, J.; Gahlaut, A.; Parmar, K. G. [Institute for Plasma Research, Bhat, Gandhinagar, Gujarat, 382 428 (India); Bandyopadhyay, M.; Chakraborty, A.; Singh, M. J. [ITER- India, Institute for Plasma Research, A-29, Sector 25, GIDC, Gandhinagar, Gujarat (India)

2011-09-26T23:59:59.000Z

244

Positive and Negative Energy Symmetry and the Cosmological Constant Problem  

E-Print Network (OSTI)

The action for gravity and the standard model includes, as well as the positive energy fermion and boson fields, negative energy fields. The Hamiltonian for the action leads through a positive and negative energy symmetry of the vacuum to a cancellation of the zero-point vacuum energy and a vanishing cosmological constant in the presence of a gravitational field solving the cosmological constant problem. To guarantee the quasi-stability of the vacuum, we postulate a positive energy sector and a negative energy sector in the universe which are identical copies of the standard model. They interact only weakly through gravity. As in the case of antimatter, the negative energy matter is not found naturally on Earth or in the universe. A positive energy spectrum and a consistent unitary field theory for a pseudo-Hermitian Hamiltonian is obtained by demanding that the pseudo-Hamiltonian is ${\\cal P}{\\cal T}$ symmetric. The quadratic divergences in the two-point vacuum fluctuations and the self-energy of a scalar field are removed. The finite scalar field self-energy can avoid the Higgs hierarchy problem in the standard model.

J. W. Moffat

2006-10-13T23:59:59.000Z

245

Positive and negative entropy production in thermodynamic systems  

E-Print Network (OSTI)

This article presents a heuristic combination of the local and global formulations of the second law of thermodynamics that suggests the possibility of theoretical existence of thermodynamic processes with positive and negative entropy production.Such processes may exhibit entropy couplings that reveal an unusual behavior from the point of view of conventional thermodynamics.

Belandria, Jose Iraides

2009-01-01T23:59:59.000Z

246

Daily digestible protein and energy requirements for growth and maintenance of sub-adult Pacific white shrimp (Litopenaeus vannamei)  

E-Print Network (OSTI)

This study utilized two diets (25 and 35% crude protein) fed at 10 different rates to produce differences in shrimp specific growth rate which were regressed against daily digestible protein (DP) and digestible energy (DE) intake to estimate daily DP and DE requirements for sub-adult L. vannamei. Apparent DP and DE requirement for maximum growth decreased throughout the 7-week trial as shrimp size increased. Mean apparent daily DP requirement for 7.69 to 13.08-g L. vannamei fed the 25% protein diet was 6.31 g DP kg-1 BW d-1 while the 35% protein diet produced a mean apparent daily DP requirement of 8.00 g DP kg-1 BW d-1 for 8.11- to 13.79-g L. vannamei. Maintenance requirements were estimated by regressing DP feed allowances back to zero weight-gain and were 1.03 g DP kg-1 BW d-1 for shrimp fed the 25% protein diet and 1.87 g DP kg-1 BW d-1 for shrimp fed the 35% protein diet. Mean apparent daily DE requirement for shrimp fed the 25% protein diet was 402.62 kJ DE kg-1 BW d-1 while the 35% protein diet produced an apparent daily DE requirement of 334.72 kJ DE kg-1 BW d-1. Mean apparent daily DE maintenance requirements for shrimp fed the 25% protein diet was 66.23 kJ DE kg-1 BW d-1 while the requirement was 78.82 kJ DE kg-1 BW d-1 for shrimp fed the 35% protein diet. Daily DP and DE requirements were also determined by regressing whole-body protein or energy change against daily DP and DE intake and were similar to those values obtained by regressing change in body weight against daily DP and DE intake. Another component of this project involved evaluating 32 different feedstuffs for dry matter, protein and energy digestibility coefficients. Fish meal apparent crude protein digestibility coefficients as a group were higher than all other ingredient classifications except purified ingredients. Protein in 48% soybean meal and 90% isolated soybean protein were significantly more digestible than protein found in fish, animal and marine meals tested. This data will improve the quality and reduce the cost of commercial shrimp feeds.

Siccardi, Anthony Joseph, III

2006-08-01T23:59:59.000Z

247

Daily Temperature and Precipitation Data from 223 Former-USSR Stations  

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

Climate Variables » Temperature » 223 Former-USSR Stations Climate Variables &#187; Temperature &#187; 223 Former-USSR Stations Daily Temperature and Precipitation Data for 223 Former-USSR Stations graphics Graphics data Data Investigators V. N. Razuvaev, E. B. Apasova, R. A. Martuganov All-Russian Research Institute of Hydrometeorological Information-World Data Centre Obninsk, Russia DOI 10.3334/CDIAC/cli.ndp040 Period of Record 1881 - 2001 (depending on station) Background Over the past several decades, many climate datasets have been exchanged directly between the principal climate data centers of the United States (NOAA's National Climatic Data Center (NCDC)) and the former-USSR/Russia (All-Russian Research Institute for Hydrometeorological Information (RIHMI)). This data exchange has its roots in a bilateral initiative known

248

EIA - Daily Report 9/19/05 - Hurricane Katrina's Impact on U.S. Oil &  

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

Monday, September 19, 5:00 pm Monday, September 19, 5:00 pm Hurricane Katrina in Perspective (see figures below). While the peak crude oil production loss from Hurricane Katrina was similar to 2004's Hurricane Ivan and even less than Hurricane Dennis earlier this year, the pace of restoration is expected to be much more similar to Hurricane Ivan than any of the other recent hurricanes. For example, while the peak daily loss in crude oil production during Hurricane Dennis was slightly more than suffered following Hurricane Katrina, within a week of the peak loss, crude oil production following Hurricane Dennis was back to normal while it will likely be months before crude oil production is back to normal following Hurricane Katrina. New York Mercantile Exchange (NYMEX) prices increased initially following the hurricane. Since early September, product prices generally have declined (increasing on September 19 with news of Tropical Storm Rita approaching the Gulf of Mexico).

249

Self-Organized Criticality in Daily Incidence of Acute Myocardial Infarction  

E-Print Network (OSTI)

Continuous periodogram power spectral analysis of daily incidence of acute myocardial infarction (AMI) reported at a leading hospital for cardiology in Pune, India for the two-year period June 1992 to May 1994 show that the power spectra follow the universal and unique inverse power law form of the statistical normal distribution. Inverse power law form for power spectra of space-time fluctuations are ubiquitous to dynamical systems in nature and have been identified as signatures of self-organized criticality. The unique quantification for self-organized criticality presented in this paper is shown to be intrinsic to quantumlike mechanics governing fractal space-time fluctuation patterns in dynamical systems. The results are consistent with El Naschie's concept of cantorian fractal spacetime characteristics for quantum systems.

A. M. Selvam; D. Sen; S. M. S. Mody

1998-10-14T23:59:59.000Z

250

EIA - Daily Report 9/16/05 - Hurricane Katrina's Impact on U.S. Oil &  

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

16, 4:00 pm 16, 4:00 pm Hurricane Katrina in Perspective (see figures below) While the peak crude oil production loss from Hurricane Katrina was similar to Hurricane Ivan last year and even less than Hurricane Dennis earlier this year, the pace of restoration is expected to be much more similar to Hurricane Ivan than any of the other recent hurricanes. For example, while the peak daily loss in crude oil production during Hurricane Dennis was slightly more than suffered following Hurricane Katrina, within a week of the peak loss, crude oil production following Hurricane Dennis was back to normal while it will likely be months before crude oil production is back to normal following Hurricane Katrina. Graph of Gulf of Mexico Shut-In Oil & Natural Gas Production due to hurricanes in 2004 & 2005

251

EIA - Daily Report 9/7/05 - Hurricane Katrina's Impact on U.S. Oil &  

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

7, 3:00 pm 7, 3:00 pm According to the Minerals Management Service (MMS), as of 11:30 September 7, Gulf of Mexico oil production was reduced by 861,000 barrels per day as a result of Hurricane Katrina, equivalent to 57.37 percent of daily Gulf of Mexico oil production (which is 1.5 million barrels per day). The MMS also reported that 4.0360 billion cubic feet per day of natural gas production was shut in, equivalent to 40.36 percent of daily Gulf of Mexico natural gas production (which is 10 billion cubic feet per day). EIA released its monthly Short-Term Energy Outlook on Wednesday, September 7. Because considerable uncertainty remains regarding the specific extent of Katrina's damage, it is difficult to provide a single forecast for the upcoming winter and subsequent months as is typical in Outlook. More detailed damage assessments should be forthcoming over the next several weeks, which should clarify our forecast. For the September Outlook, EIA established three basic scenarios to represent a range of plausible outcomes for oil and natural gas supply over the next several months and through 2006: (1) Fast Recovery, which assumes a very favorable set of circumstances for getting supplies back to normal; (2) Slow Recovery, which assumes that significant outages in oil and natural gas production and delivery from the Gulf area continue at least into November; and (3) Medium Recovery, which assumes a path in between Slow and Fast Recovery. In all cases, return to normal operations, in terms of oil and natural gas production and distribution, is achieved or nearly achieved by December. By the end of September all but about 0.9 million barrels per day of crude oil refining capacity is expected to be back at full rates under the Medium Recovery case.

252

Forecasting of preprocessed daily solar radiation time series using neural networks  

SciTech Connect

In this paper, we present an application of Artificial Neural Networks (ANNs) in the renewable energy domain. We particularly look at the Multi-Layer Perceptron (MLP) network which has been the most used of ANNs architectures both in the renewable energy domain and in the time series forecasting. We have used a MLP and an ad hoc time series pre-processing to develop a methodology for the daily prediction of global solar radiation on a horizontal surface. First results are promising with nRMSE {proportional_to} 21% and RMSE {proportional_to} 3.59 MJ/m{sup 2}. The optimized MLP presents predictions similar to or even better than conventional and reference methods such as ARIMA techniques, Bayesian inference, Markov chains and k-Nearest-Neighbors. Moreover we found that the data pre-processing approach proposed can reduce significantly forecasting errors of about 6% compared to conventional prediction methods such as Markov chains or Bayesian inference. The simulator proposed has been obtained using 19 years of available data from the meteorological station of Ajaccio (Corsica Island, France, 41 55'N, 8 44'E, 4 m above mean sea level). The predicted whole methodology has been validated on a 1.175 kWc mono-Si PV power grid. Six prediction methods (ANN, clear sky model, combination..) allow to predict the best daily DC PV power production at horizon d + 1. The cumulated DC PV energy on a 6-months period shows a great agreement between simulated and measured data (R{sup 2} > 0.99 and nRMSE < 2%). (author)

Paoli, Christophe; Muselli, Marc; Nivet, Marie-Laure [University of Corsica, CNRS UMR SPE, Corte (France); Voyant, Cyril [University of Corsica, CNRS UMR SPE, Corte (France); Hospital of Castelluccio, Radiotherapy Unit, Ajaccio (France)

2010-12-15T23:59:59.000Z

253

Negative heat capacity at phase-separation in macroscopic systems  

E-Print Network (OSTI)

Systems with long-range as well with short-range interactions should necessarily have a convex entropy S(E) at proper phase transitions of first order, i.e. when a separation of phases occurs. Here the microcanonical heat capacity c(E)= -\\frac{(\\partial S/\\partial E)^2}{\\partial^2S/\\partial E^2} is negative. This should be observable even in macroscopic systems when energy fluctuations with the surrounding world can be sufficiently suppressed.

D. H. E. Gross

2005-08-19T23:59:59.000Z

254

Direct measurement of the negative-kaon form factor  

Science Conference Proceedings (OSTI)

The electromagnetic form factor of the negative kaon has been measured by direct scattering of 250 GeV/c kaons from the stationary electrons of a liquid-hydrogen target. The deviation of the measured elastic scattering cross section from the point cross section may be characterized by a root-mean-square kaon radius of /sup 1/2/=0.53 +- 0.05 fm.

Dally, E.B.; Hauptman, J.M.; Kubic, J.; Stork, D.H.; Watson, A.B.; Guzik, Z.; Nigmanov, T.S.; Riabtsov, V.D.; Tsyganov, E.N.; Vodopianov, A.S.; Beretvas, A.; Grigorian, A.; Tompkins, J.C.; Toohig, T.E.; Wehmann, A.A.; Poirier, J.A.; Rey, C.A.; Volk, J.T.; Rapp, P.D.; Shepard, P.F.

1980-07-28T23:59:59.000Z

255

Negative ion detachment cross sections. Interim progress report  

DOE Green Energy (OSTI)

The authors have measured absolute cross sections for electron detachment and charge exchange for collision of O and S with atomic hydrogen, have investigated the sputtering and photodesorption of negative ions from gas covered surfaces, and have begun an investigation of photon-induced field emission of electrons from exotic structures. Brief descriptions of these activities as well as future plans for these projects are given below.

Champion, R.L.; Doverspike, L.D.

1992-10-01T23:59:59.000Z

256

Negative Decaborane Ion Beam from ITEP Bernas Ion Source  

SciTech Connect

A joint research and development effort focusing on the design of steady state, intense ion sources has been in progress for the past two and a half years with a couple of Russian institutions. The ultimate goal of the effort is to meet the two, energy extreme range needs of mega-electron-volt and 100's of electron-volt ion implanters. This endeavor has already resulted in record steady state output currents of higher charge state antimony and phosphorous ions to meet high-energy implantation requirements. For low energy ion implantation, R and D efforts have involved molecular ions and a novel plasmaless/gasless deceleration method. To date, 1 emA of positive decaborane ions were extracted at 10 keV and a smaller current of negative decaborane ions were also extracted. Though of scientific interest, negative decaborane ions did not attract interest from industry, since the semiconductor ion implant industry seems to have solved the wafer-charging problem. This paper describes conditions under which negative decaborane ions are formed and extracted from a Bernas ion source.

Petrenko, S. V.; Kuibeda, R. P.; Kulevoy, T. V.; Batalin, V. A.; Pershin, V. I.; Koslov, A. V.; Stasevich, Yu. B.; Koshelev, V. A. [Institute for Theoretical and Experimental Physics, Moscow, (Russian Federation); Hershcovitch, A.; Johnson, B. M. [Brookhaven National Laboratory, Upton, New York 11973 (United States); Oks, E. M.; Gushenets, V. I. [High Current Electronics Institute Russian Academy of Sciences, Tomsk, 634055 (Russian Federation); Poole, H. J. [PVI, Oxnard, California 93031-5023 (United States)

2007-08-10T23:59:59.000Z

257

Assessing Energy Impact of Plug-In Hybrid Electric Vehicles: Significance of Daily Distance Variation over Time and Among Drivers  

Science Conference Proceedings (OSTI)

Accurate assessment of the impact of plug-in hybrid electric vehicles (PHEVs) on petroleum and electricity consumption is a necessary step toward effective policies. Variations in daily vehicle miles traveled (VMT) over time and among drivers affect PHEV energy impact, but the significance is not well understood. This paper uses a graphical illustration, a mathematical derivation, and an empirical study to examine the cause and significance of such an effect. The first two methods reveal that ignoring daily variation in VMT always causes underestimation of petroleum consumption and overestimation of electricity consumption by PHEVs; both biases increase as the assumed PHEV charge-depleting (CD) range moves closer to the average daily VMT. The empirical analysis based on national travel survey data shows that the assumption of uniform daily VMT over time and among drivers causes nearly 68% underestimation of expected petroleum use and nearly 48% overestimation of expected electricity use by PHEVs with a 40-mi CD range (PHEV40s). Also for PHEV40s, consideration of daily variation in VMT over time but not among drivers similar to the way the utility factor curve is derived in SAE Standard SAE J2841 causes underestimation of expected petroleum use by more than 24% and overestimation of expected electricity use by about 17%. Underestimation of petroleum use and overestimation of electricity use increase with larger-battery PHEVs.

Lin, Zhenhong [ORNL; Greene, David L [ORNL

2012-01-01T23:59:59.000Z

258

Experimental analysis of thermal performance of flat plate and evacuated tube solar collectors in stationary standard and daily conditions  

SciTech Connect

New comparative tests on two different types of solar collectors are presented in this paper. A standard glazed flat plate collector and an evacuated tube collector are installed in parallel and tested at the same working conditions; the evacuated collector is a direct flow through type with external compound parabolic concentrator (CPC) reflectors. Efficiency in steady-state and quasi-dynamic conditions is measured following the standard and it is compared with the input/output curves measured for the whole day. The first purpose of the present work is the comparison of results in steady-state and quasi-dynamic test methods both for flat plate and evacuated tube collectors. Besides this, the objective is to characterize and to compare the daily energy performance of these two types of collectors. An effective mean for describing and analyzing the daily performance is the so called input/output diagram, in which the collected solar energy is plotted against the daily incident solar radiation. Test runs have been performed in several conditions to reproduce different conventional uses (hot water, space heating, solar cooling). Results are also presented in terms of daily efficiency versus daily average reduced temperature difference: this allows to represent the comparative characteristics of the two collectors when operating under variable conditions, especially with wide range of incidence angles. (author)

Zambolin, E.; Del Col, D. [Dipartimento di Fisica Tecnica, Universita degli Studi di Padova, Via Venezia 1, 35131 Padova (Italy)

2010-08-15T23:59:59.000Z

259

Reducing Open Cell Landfill Methane Emissions with a Bioactive Alternative Daily  

Science Conference Proceedings (OSTI)

Methane and carbon dioxide are formed in landfills as wastes degrade. Molecule-for-molecule, methane is about 20 times more potent than carbon dioxide at trapping heat in the earth's atmosphere, and thus, it is the methane emissions from landfills that are scrutinized. For example, if emissions composed of 60% methane and 40% carbon dioxide were changed to a mix that was 40% methane and 60% carbon dioxide, a 30% reduction in the landfill's global warming potential would result. A 10% methane, 90% carbon dioxide ratio will result in a 75% reduction in global warming potential compared to the baseline. Gas collection from a closed landfill can reduce emissions, and it is sometimes combined with a biocover, an engineered system where methane oxidizing bacteria living in a medium such as compost, convert landfill methane to carbon dioxide and water. Although methane oxidizing bacteria merely convert one greenhouse gas (methane) to another (carbon dioxide), this conversion can offer significant reductions in the overall greenhouse gas contribution, or global warming potential, associated with the landfill. What has not been addressed to date is the fact that methane can also escape from a landfill when the active cell is being filled with waste. Federal regulations require that newly deposited solid waste to be covered daily with a 6 in layer of soil or an alternative daily cover (ADC), such as a canvas tarp. The aim of this study was to assess the feasibility of immobilizing methane oxidizing bacteria into a tarp-like matrix that could be used for alternative daily cover at open landfill cells to prevent methane emissions. A unique method of isolating methanotrophs from landfill cover soil was used to create a liquid culture of mixed methanotrophs. A variety of prospective immobilization techniques were used to affix the bacteria in a tarp-like matrix. Both gel encapsulation of methanotrophs and gels with liquid cores containing methanotrophs were readily made but prone to rapid desiccation. Bacterial adsorption onto foam padding, natural sponge, and geotextile was successful. The most important factor for success appeared to be water holding capacity. Prototype biotarps made with geotextiles plus adsorbed methane oxidizing bacteria were tested for their responses to temperature, intermittent starvation, and washing (to simulate rainfall). The prototypes were mesophilic, and methane oxidation activity remained strong after one cycle of starvation but then declined with repeated cycles. Many of the cells detached with vigorous washing, but at least 30% appeared resistant to sloughing. While laboratory landfill simulations showed that four-layer composite biotarps made with two different types of geotextile could remove up to 50% of influent methane introduced at a flux rate of 22 g m{sup -2} d{sup -1}, field experiments did not yield high activity levels. Tests revealed that there were high hour-to-hour flux variations in the field, which, together with frequent rainfall events, confounded the field testing. Overall, the findings suggest that a methanotroph embedded biotarp appears to be a feasible strategy to mitigate methane emission from landfill cells, although the performance of field-tested biotarps was not robust here. Tarps will likely be best suited for spring and summer use, although the methane oxidizer population may be able to shift and adapt to lower temperatures. The starvation cycling of the tarp may require the capacity for intermittent reinoculation of the cells, although it is also possible that a subpopulation will adapt to the cycling and become dominant. Rainfall is not expected to be a major factor, because a baseline biofilm will be present to repopulate the tarp. If strong performance can be achieved and documented, the biotarp concept could be extended to include interception of other compounds beyond methane, such as volatile aromatic hydrocarbons and chlorinated solvents.

Helene Hilger; James Oliver; Jean Bogner; David Jones

2009-03-31T23:59:59.000Z

260

PHEV Energy Use Estimation: Validating the Gamma Distribution for Representing the Random Daily Driving Distance  

SciTech Connect

The petroleum and electricity consumptions of plug-in hybrid electric vehicles (PHEVs) are sensitive to the variation of daily vehicle miles traveled (DVMT). Some studies assume DVMT to follow a Gamma distribution, but such a Gamma assumption is yet to be validated. This study finds the Gamma assumption valid in the context of PHEV energy analysis, based on continuous GPS travel data of 382 vehicles, each tracked for at least 183 days. The validity conclusion is based on the found small prediction errors, resulting from the Gamma assumption, in PHEV petroleum use, electricity use, and energy cost. The finding that the Gamma distribution is valid and reliable is important. It paves the way for the Gamma distribution to be assumed for analyzing energy uses of PHEVs in the real world. The Gamma distribution can be easily specified with very few pieces of driver information and is relatively easy for mathematical manipulation. Given the validation in this study, the Gamma distribution can now be used with better confidence in a variety of applications, such as improving vehicle consumer choice models, quantifying range anxiety for battery electric vehicles, investigating roles of charging infrastructure, and constructing online calculators that provide personal estimates of PHEV energy use.

Lin, Zhenhong [ORNL; Dong, Jing [ORNL; Liu, Changzheng [ORNL; Greene, David L [ORNL

2012-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

A Study to Quantify the Effectiveness of Daily Endorectal Balloon for Prostate Intrafraction Motion Management  

Science Conference Proceedings (OSTI)

Purpose: To quantify intrafraction prostate motion between patient groups treated with and without daily endorectal balloon (ERB) employed during prostate radiotherapy and establish the effectiveness of the ERB. Methods: Real-time intrafraction prostate motion from 29 non-ERB (1,061 sessions) and 30 ERB (1,008 sessions) patients was evaluated based on three-dimensional (3D), left, right, cranial, caudal, anterior, and posterior displacements. The average percentage of time with 3D and unidirectional prostate displacements >2, 3, 4, 5, 6, 7, 8, 9, and 10 mm in 1-min intervals was calculated for up to 6 min of treatment time. The Kolmogorov-Smirnov method was used to evaluate the intrafraction prostate motion pattern between both groups. Results: Large 3D motion (up to 1 cm or more) was only observed in the non-ERB group. The motion increased as a function of elapsed time for displacements >2-8 mm for the non-ERB group and >2-4 mm for the ERB group (p percentage time distributions between the two groups were significantly different for motion >5 mm (p percentage of time that the prostate was displaced in any direction was less in the ERB group for almost all magnitudes of motion considered. The directional analysis shows that the ERB reduced IMs in almost all directions, especially the anterior-posterior direction.

Wang, Ken Kang-Hsin, E-mail: wangken@uphs.upenn.edu [Department of Radiation Oncology, Hospital of University of Pennsylvania, Philadelphia, PA (United States); Vapiwala, Neha; Deville, Curtiland; Plastaras, John P.; Scheuermann, Ryan; Lin Haibo; Bar Ad, Voika; Tochner, Zelig; Both, Stefan [Department of Radiation Oncology, Hospital of University of Pennsylvania, Philadelphia, PA (United States)

2012-07-01T23:59:59.000Z

262

Lithium aluminum/iron sulfide battery having lithium aluminum and silicon as negative electrode  

DOE Patents (OSTI)

A method of making a negative electrode, the electrode made thereby and a secondary electrochemical c

Gilbert, M.; Kaun, T.

1984-01-20T23:59:59.000Z

263

Studies of transition states and radicals by negative ion photodetachment  

SciTech Connect

Negative ion photodetachment is a versatile tool for the production and study of transient neutral species such as reaction intermediates and free radicals. Photodetachment of the stable XHY{sup {minus}} anion provides a direct spectroscopic probe of the transition state region of the potential energy surface for the neutral hydrogen transfer reaction X + HY {yields} XH + Y, where X and Y are halogen atoms. The technique is especially sensitive to resonances, which occur at a specific energy, but the spectra also show features due to direct scattering. We have used collinear adiabatic simulations of the photoelectron spectra to evaluate trail potential energy surfaces for the biomolecular reactions and have extended the adiabatic approach to three dimensions and used it to evaluate empirical potential energy surfaces for the I + Hl and Br + HI reactions. In addition, we have derived an empirical, collinear potential energy surface for the Br + HBr reaction that reproduces our experimental results and have extended this surface to three dimensions. Photodetachment of a negative ion can be also used to study neutral free radicals. We have studied the vibrational and electronic spectroscopy of CH{sub 2}NO{sub 2} by photoelectron spectroscopy of CH{sub 2}NO{sub 2}{sup {minus}}, determining the electron affinity of CH{sub 2}NO{sub 2}, gaining insight on the bonding of the {sup 2}B{sub 1} ground state and observing the {sup 2}A{sub 2} excited state for the first time. Negative ion photodetachment also provides a novel and versatile source of mass-selected, jet-cooled free radicals. We have studied the photodissociation of CH{sub 2}NO{sub 2} at 270, 235, and 208 nm, obtaining information on the dissociation products by measuring the kinetic energy release in the photodissociation.

Metz, R.B.

1991-12-01T23:59:59.000Z

264

A short remark on negative energy densities and quantum inequalities  

E-Print Network (OSTI)

In quantum field theory it is generally known that the energy density may be negative at a given point in spacetime. A number of papers have shown that there is a restriction on this energy density which is called a quantum inequality (QI). A QI is the lower bound to the "weighted average" of the energy density at a given point integrated over a time dependent sampling function. In this paper we give an example of a sampling function for which there is no QI.

Solomon, Dan

2009-01-01T23:59:59.000Z

265

A short remark on negative energy densities and quantum inequalities  

E-Print Network (OSTI)

In quantum field theory it is generally known that the energy density may be negative at a given point in spacetime. A number of papers have shown that there is a restriction on this energy density which is called a quantum inequality (QI). A QI is the lower bound to the "weighted average" of the energy density at a given point integrated over a time dependent sampling function. In this paper we give an example of a sampling function for which there is no QI.

Dan Solomon

2009-01-05T23:59:59.000Z

266

Calibrating the DARHT Electron Spectrometer with Negative Ions  

DOE Green Energy (OSTI)

Negative ions of hydrogen and oxygen have been used to calibrate the DARHT electron spectrometer over the momentum range of 2 to 20 MeV/c. The calibration was performed on September 1, 3, and 8, 2004, and it is good to 0.5% absolute, provided that instrument alignment is carefully controlled. The momentum in MeV/c as a function of magnetic field (B in Gauss) and position in the detector plane (X in mm) is: P = (B-6.28)/(108.404-0.1935*X)

R. Trainham (STL), A. P. Tipton (LAO), and R. R. Bartech (LANL)

2005-11-01T23:59:59.000Z

267

Equilibrium with exponential utility and non-negative consumption  

E-Print Network (OSTI)

We study a multi-period Arrow-Debreu equilibrium in a heterogeneous economy populated by agents trading in a complete market. Each agent is represented by an exponential utility function, where additionally no negative level of consumption is permitted. We derive an explicit formula for the optimal consumption policies involving a put option depending on the state price density. We exploit this formula to prove the existence of an equilibrium and then provide a characterization of all possible equilibria, under the assumption of positive endowments. Via particular examples, we demonstrate that uniqueness is not always guaranteed. Finally, we discover the presence of infinitely many equilibria when endowments are vanishing.

Muraviev, Roman

2011-01-01T23:59:59.000Z

268

Electron Rescattering in Above-Threshold Photodetachment of Negative Ions  

Science Conference Proceedings (OSTI)

We present experimental and theoretical results on photodetachment of Br{sup -} and F{sup -} in a strong infrared laser field. The observed photoelectron spectra of Br{sup -} exhibit a high-energy plateau along the laser polarization direction, which is identified as being due to the rescattering effect. The shape and the extension of the plateau is found to be influenced by the depletion of negative ions during the interaction with the laser pulse. Our findings represent the first observation of electron rescattering in above-threshold photodetachment of an atomic system with a short-range potential.

Gazibegovic-Busuladzic, A. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo, Bosnia and Herzegovina (Bosnia and Herzegowina); Milosevic, D. B. [Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, 71000 Sarajevo, Bosnia and Herzegovina (Bosnia and Herzegowina); Max-Born-Institut, Max-Born-Strasse 2a, D-12489 Berlin (Germany); Becker, W. [Max-Born-Institut, Max-Born-Strasse 2a, D-12489 Berlin (Germany); Bergues, B.; Hultgren, H.; Kiyan, I. Yu. [Albert-Ludwigs-Universitaet, D-79104 Freiburg (Germany)

2010-03-12T23:59:59.000Z

269

Elastic-scattering measurement of the negative-pion radius  

SciTech Connect

A new measurement of the elastic scattering of 250-GeV/c negative pions by electrons provides form-factor results from 0.0368 = 0.439 +- 0.030 fm/sup 2/ or /sup 1/2/ = 0.663 +- 0.023 fm. Comparisons are made with previous elastic-scattering experiments as well as with results obtained from electroproduction experiments, e/sup +/e/sup -/ annihilation experiments, and phenomenological analyses.

Dally, E.B.; Hauptman, J.M.; Kubic, J.

1982-02-08T23:59:59.000Z

270

Loss compensated negative index material at optical wavelengths  

SciTech Connect

We present a computational approach, allowing for a self-consistent treatment of three-dimensional (3D) fishnet metamaterial operating at 710 nm wavelength coupled to a gain material incorporated into the nanostructure. We show numerically that loss-free negative index material is achievable by incorporating gain material inside the fishnet structure. The effective gain coefficient of the combined fishnet-gain system is much larger than its bulk counterpart and the figure-of-merit (FOM = | Re(n)/Im(n) |) increases dramatically with gain. Transmission, reflection, and absorption data, as well as the retrieved effective parameters, are presented for the fishnet structure with and without gain.

Fang, Anan; Huang, Zhixiang; Koschny, Thomas; Soukoulis, Costas M.

2012-05-20T23:59:59.000Z

271

Electron energy recovery system for negative ion sources  

DOE Patents (OSTI)

An electron energy recovery system for negative ion sources is provided. The system, employs crossed electric and magnetic fields to separate the electrons from ions as they are extracted from a negative ion source plasma generator and before the ions are accelerated to their full kinetic energy. With the electric and magnetic fields oriented 90.degree. to each other, the electrons are separated from the plasma and remain at approximately the electrical potential of the generator in which they were generated. The electrons migrate from the ion beam path in a precessing motion out of the ion accelerating field region into an electron recovery region provided by a specially designed electron collector electrode. The electron collector electrode is uniformly spaced from a surface of the ion generator which is transverse to the direction of migration of the electrons and the two surfaces are contoured in a matching relationship which departs from a planar configuration to provide an electric field component in the recovery region which is parallel to the magnetic field thereby forcing the electrons to be directed into and collected by the electron collector electrode. The collector electrode is maintained at a potential slightly positive with respect to the ion generator so that the electrons are collected at a small fraction of the full accelerating supply voltage energy.

Dagenhart, William K. (Oak Ridge, TN); Stirling, William L. (Oak Ridge, TN)

1982-01-01T23:59:59.000Z

272

Changes in Climate at High Southern Latitudes: A Unique Daily Record at Orcadas Spanning 1903–2008  

Science Conference Proceedings (OSTI)

The climate observations at Orcadas represent the only southern high-latitude site where data span more than a century, and its daily measurements are presented for the first time in this paper. Although limited to a single station, the observed ...

Natalia Zazulie; Matilde Rusticucci; Susan Solomon

2010-01-01T23:59:59.000Z

273

Long-Term Trend and Decadal Variability of Persistence of Daily 500-mb Geopotential Height Anomalies during Boreal Winter  

Science Conference Proceedings (OSTI)

An analysis has been made of the trend and decadal variability of persistence of daily 500-mb (hPa) geopotential height anomalies for the winter season. The persistence is measured based on autocorrelations at 1- and 5-day lags (denoted r1 and r5,...

Ruiqiang Ding; Jianping Li

2009-10-01T23:59:59.000Z

274

Daily combined economic emission scheduling of hydrothermal systems with cascaded reservoirs using self organizing hierarchical particle swarm optimization technique  

Science Conference Proceedings (OSTI)

Daily optimum economic emission scheduling of hydrothermal systems is an important task in the operation of power systems. Many heuristic techniques such as differential evolution, and particle swarm optimization have been applied to solve this problem ... Keywords: Cascaded reservoirs, Combined economic emission scheduling (CEES), Hydrothermal systems, Self-organizing particle swarm optimization with time-varying acceleration coefficients (SOHPSO_TVAC)

K. K. Mandal; N. Chakraborty

2012-02-01T23:59:59.000Z

275

Nonlinear model predictive control for dosing daily anticancer agents using a novel saturating-rate cell-cycle model  

Science Conference Proceedings (OSTI)

A nonlinear model predictive control (NMPC) algorithm was developed to dose the chemotherapeutic agent tamoxifen based on a novel saturating-rate, cell-cycle model (SCM). Using daily tumor measurements, the algorithm decreased tumor volume along a specified ... Keywords: Biomedical systems, Cancer, Nonlinear model, Nonlinear model predictive control, Pharmacodynamics, Pharmacokinetics

Jeffry A. Florian, Jr.; Julie L. Eiseman; Robert S. Parker

2008-03-01T23:59:59.000Z

276

Long-Term Variability of Daily North Atlantic–European Pressure Patterns since 1850 Classified by Simulated Annealing Clustering  

Science Conference Proceedings (OSTI)

Reconstructed daily mean sea level pressure patterns of the North Atlantic–European region are classified for the period 1850 to 2003 to explore long-term changes of the atmospheric circulation and its impact on long-term temperature variability ...

A. Philipp; P. M. Della-Marta; J. Jacobeit; D. R. Fereday; P. D. Jones; A. Moberg; H. Wanner

2007-08-01T23:59:59.000Z

277

Testing the bivariate distribution of daily equity returns using copulas. An application to the Spanish stock market  

Science Conference Proceedings (OSTI)

The problem of the identification of dependencies between time series of equity returns is analyzed. Marginal distribution functions are assumed to be known, and a bivariate chi-square test of fit is applied in a fully parametric copula approach. Several ... Keywords: Bivariate chi-square statistic, Copulas, Daily equity returns, Risk management

Oriol Roch; Antonio Alegre

2006-11-01T23:59:59.000Z

278

A Deterministic Approach to the Validation of Historical Daily Temperature and Precipitation Data from the Cooperative Network  

Science Conference Proceedings (OSTI)

It is widely known that the TD3200 (Summary of the Day Cooperative Network) database held by the National Climatic Data Center contains tens of thousands of erroneous daily values resulting from data-entry, data-recording, and data-reformatting ...

Thomas Reek; Stephen R. Doty; Timothy W. Owen

1992-06-01T23:59:59.000Z

279

The role of high Rydberg states in the generation of negative ions in negative-ion discharges  

DOE Green Energy (OSTI)

The generation of substantial yields of H{sup {minus}} ions in a laser excited H{sub 2} gas has been reported by Pinnaduwage and Christoforu. These H{sup {minus}} yields have been attributed to (2 + 1) REMP photoexcitation processes leading to dissociative attachment of doubly-excited or superexcited states (SES), or dissociative attachment of high Rydberg product states. The new feature of these experiments is the implied large dissociative attachment rates, of order 10{sup {minus}6} cm{sup 3} sec{sup {minus}1}, values that are orders-of-magnitude larger than the dissociative attachment of the vibrationally excited levels of the ground electronic state. While these laser excitations are not directly applicable to a hydrogen negative-ion discharge, the implication of large dissociative attachment rates to the high Rydberg states may affect both the total negative-ion density and the interpretation of discharge performance. Within the discharge energetic electrons will collisionally excite the higher Rydberg states, and the relative contribution of the dissociative attachment of these states when compared with the dissociative attachment to the ground state vibrational levels, is the topic of this paper.

Hiskes, J.R.

1995-11-28T23:59:59.000Z

280

Experimental studies of the Negative Ion of Hydrogen. Final Report  

DOE Green Energy (OSTI)

This document presents an overview of the results of the DOE'S support of experimental research into the structure and interactions of the negative ion of hydrogen conducted by the Department of Physics and Astronomy of the University of New Mexico at the Los Alamos National Laboratory. The work involves many collaborations with scientists from both institutions, as well as others. Although official DOE support for this work began in 1977, the experiment that led to it was done in 1971, near the time the 800 MeV linear accelerator at Los Alamos (LAMPF) first came on line. Until the mid nineties, the work was performed using the relativistic beam at LAMFF. The most recent results were obtained using the 35 keV injector beam for the Ground Test Accelerator at Los Alamos. A list of all published results from this work is presented.

Bryant, Howard C.

1999-06-30T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

A Negative-Overhead, Self-Timed Pipeline  

E-Print Network (OSTI)

This' paper presents' a novel variation of wave pipelining that we call "surfing." In previous wave pipelined designs, timing uncertainty grows' monotonically as events' propagate through gates or other logic elements'. We bound this dispersion by propagating a timing pulse along with the data values. Our logic elements have delays' that are smaller in the presence of the pulse than in its' absence. This' produces a "surfing " effect: events' are bound in close proximity to the timing pulse. We demonstrate this approach with the design of a 4x12 multiplier. Spice simulations from the extracted layout indicate that this design is robust in the presence of fabrication parameter variation and power supply noise. Because timing is' maintained by accelerating the logic, our designs achieve lower latency than their purely combinational equivalents'. Thus, the control overhead for these designs is' indeed negative.

Brian D. Winters; Mark R. Greenstreet

2002-01-01T23:59:59.000Z

282

Multiple delivery cesium oven system for negative ion sources  

Science Conference Proceedings (OSTI)

Distribution of cesium in large negative ion beam sources to be operational in ITER, is presently based on the use of three or more cesium ovens, which operate simultaneously and are controlled remotely. However, use of multiple Cs ovens simultaneously is likely to pose difficulties in operation and maintenance of the ovens. An alternate method of Cs delivery, based on a single oven distribution system is proposed as one which could reduce the need of simultaneous operation of many ovens. A proof of principle experiment verifying the concept of a multinozzle distributor based Cs oven has been carried out at Institute for Plasma Research. It is also observed that the Cs flux is not controlled by Cs reservoir temperature after few hours of operation but by the temperature of the distributor which starts behaving as a Cs reservoir.

Bansal, G.; Bhartiya, S.; Pandya, K.; Bandyopadhyay, M.; Singh, M. J.; Soni, J.; Gahlaut, A.; Parmar, K. G.; Chakraborty, A. [Institute for Plasma Research, Bhat, Gandhinagar, Gujarat 382428 (India)

2012-02-15T23:59:59.000Z

283

Negative-mass Instability in Nonlinear Plasma Waves  

SciTech Connect

The negative-mass instability (NMI), previously found in ion traps, appears as a distinct regime of the sideband instability in nonlinear plasma waves with trapped particles. As the bounce frequency of these particles decreases with the bounce action, bunching can occur if the action distribution is inverted in trapping islands. In contrast to existing theories that also infer instabilities from the anharmonicity of bounce oscillations, spatial periodicity of the islands turns out to be unimportant, and the particle distribution can be unstable even if it is at at the resonance. An analytical model is proposed which describes both single traps and periodic nonlinear waves and concisely generalizes the conventional description of the sideband instability in plasma waves. The theoretical results are supported by particle-in-cell simulations carried out for a regime accentuating the NMI effect.

I.Y. Dodin, P.F. Schmit, J. Rocks and N.J. Fisch

2013-01-30T23:59:59.000Z

284

Nonlinear beam deflection in photonic lattices with negative defects  

Science Conference Proceedings (OSTI)

We demonstrate both theoretically and experimentally that a nonlinear beam can be reflected by a negative defect in a photonic lattice if the incident angle is below a threshold value. Above this threshold angle, the beam simply passes through the defect. This phenomenon occurs in both one- and two-dimensional photonic lattices, and it provides a way to use the incident angle to control beam propagation in a lattice network. If the defect is absent or positive, no evident transition from reflection to transmission occurs. These nonlinear phenomena are also compared with linear nondiffracting-beam propagation in a photonic lattice with a defect, and both similarities and differences are observed. In addition, some important features in linear and nonlinear beam propagations are explained analytically by using a linear model with a delta-function defect.

Wang Jiandong [College of Physical Electronics, University of Electronic Science and Technology of China, Chengdu 610054 (China); Ye Zhuoyi; Lou Cibo [TEDA Applied Physical School, Nankai University, Tianjin 300457 (China); Miller, Alexandra; Zhang Peng [Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132 (United States); Hu Yi; Chen Zhigang [TEDA Applied Physical School, Nankai University, Tianjin 300457 (China); Department of Physics and Astronomy, San Francisco State University, San Francisco, California 94132 (United States); Yang Jianke [Department of Mathematics and Statistics, University of Vermont, Burlington, Vermont 05401 (United States)

2011-03-15T23:59:59.000Z

285

Models of radiofrequency coupling for negative ion sources  

SciTech Connect

Radiofrequency heating for ICP (inductively coupled plasma) ion sources depends on the source operating pressure, the presence or absence of a Faraday shield, the driver coil geometry, the frequency used, and the magnetic field configuration: in negative ion source a magnetic filter seems necessary for H{sup -} survival. The result of single particle simulations showing the possibility of electron acceleration in the preglow regime and for reasonable driver chamber radius (15 cm) is reported, also as a function of the static external magnetic field. An effective plasma conductivity, depending not only from electron density, temperature, and rf field but also on static magnetic field is here presented and compared to previous models. Use of this conductivity and of multiphysics tools for a plasma transport and heating model is shown and discussed for a small source.

Cavenago, M.; Petrenko, S. [INFN-LNL, viale dell'Universita n.2, 35020 Legnaro (Italy)

2012-02-15T23:59:59.000Z

286

Negative Quasi-Probability as a Resource for Quantum Computation  

E-Print Network (OSTI)

A central problem in quantum information is to determine the minimal physical resources that are required for quantum computational speedup and, in particular, for fault-tolerant quantum computation. We establish a remarkable connection between the potential for quantum speed-up and the onset of negative values in a distinguished quasi-probability representation, a discrete analog of the Wigner function for quantum systems of odd dimension. This connection allows us to resolve an open question on the existence of bound states for magic-state distillation: we prove that there exist mixed states outside the convex hull of stabilizer states that cannot be distilled to non-stabilizer target states using stabilizer operations. We also provide an efficient simulation protocol for Clifford circuits that extends to a large class of mixed states, including bound universal states.

Victor Veitch; Christopher Ferrie; David Gross; Joseph Emerson

2012-01-05T23:59:59.000Z

287

RF-Plasma Source Commissioning in Indian Negative Ion Facility  

Science Conference Proceedings (OSTI)

The Indian program of the RF based negative ion source has started off with the commissioning of ROBIN, the inductively coupled RF based negative ion source facility under establishment at Institute for Plasma research (IPR), India. The facility is being developed under a technology transfer agreement with IPP Garching. It consists of a single RF driver based beam source (BATMAN replica) coupled to a 100 kW, 1 MHz RF generator with a self excited oscillator, through a matching network, for plasma production and ion extraction and acceleration. The delivery of the RF generator and the RF plasma source without the accelerator, has enabled initiation of plasma production experiments. The recent experimental campaign has established the matching circuit parameters that result in plasma production with density in the range of 0.5-1x10{sup 18}/m{sup 3}, at operational gas pressures ranging between 0.4-1 Pa. Various configurations of the matching network have been experimented upon to obtain a stable operation of the set up for RF powers ranging between 25-85 kW and pulse lengths ranging between 4-20 s. It has been observed that the range of the parameters of the matching circuit, over which the frequency of the power supply is stable, is narrow and further experiments with increased number of turns in the coil are in the pipeline to see if the range can be widened. In this paper, the description of the experimental system and the commissioning data related to the optimisation of the various parameters of the matching network, to obtain stable plasma of required density, are presented and discussed.

Singh, M. J.; Bandyopadhyay, M.; Yadava, Ratnakar; Chakraborty, A. K. [ITER- India, Institute for Plasma Research, A-29, Sector 25, GIDC, Gandhinagar, Gujrat (India); Bansal, G.; Gahlaut, A.; Soni, J.; Kumar, Sunil; Pandya, K.; Parmar, K. G.; Sonara, J. [Institute for Plasma Research, Bhat Gandhinagar, Gujrat (India); Kraus, W.; Heinemann, B.; Riedl, R.; Obermayer, S.; Martens, C.; Franzen, P.; Fantz, U. [Max-Planck-Institut fuer Plasmaphysik, Boltzmannstrasse 2, D-85748 Garching (Germany)

2011-09-26T23:59:59.000Z

288

Handbook of solar energy data for south-facing surfaces in the United States. Volume II. Average hourly and total daily insolation data for 235 localities (Alaska - Montana)  

DOE Green Energy (OSTI)

Average hourly and daily total insolaion estimates are given for 235 US sites at a variety of array tilt angles. (MHR)

Smith, J.H.

1980-01-15T23:59:59.000Z

289

A Bivariate Mixed Distribution with a Heavy-tailed Component and its Application to Single-site Daily Rainfall Simulation  

Science Conference Proceedings (OSTI)

This paper presents an improved brivariate mixed distribution, which is capable of modeling the dependence of daily rainfall from two distinct sources (e.g., rainfall from two stations, two consecutive days, or two instruments such as satellite and rain gauge). The distribution couples an existing framework for building a bivariate mixed distribution, the theory of copulae and a hybrid marginal distribution. Contributions of the improved distribution are twofold. One is the appropriate selection of the bivariate dependence structure from a wider admissible choice (10 candidate copula families). The other is the introduction of a marginal distribution capable of better representing low to moderate values as well as extremes of daily rainfall. Among several applications of the improved distribution, particularly presented here is its utility for single-site daily rainfall simulation. Rather than simulating rainfall occurrences and amounts separately, the developed generator unifies the two processes by generalizing daily rainfall as a Markov process with autocorrelation described by the improved bivariate mixed distribution. The generator is first tested on a sample station in Texas. Results reveal that the simulated and observed sequences are in good agreement with respect to essential characteristics. Then, extensive simulation experiments are carried out to compare the developed generator with three other alternative models: the conventional two-state Markov chain generator, the transition probability matrix model and the semi-parametric Markov chain model with kernel density estimation for rainfall amounts. Analyses establish that overall the developed generator is capable of reproducing characteristics of historical extreme rainfall events and is apt at extrapolating rare values beyond the upper range of available observed data. Moreover, it automatically captures the persistence of rainfall amounts on consecutive wet days in a relatively natural and easy way. Another interesting observation is that the recognized ‘overdispersion’ problem in daily rainfall simulation ascribes more to the loss of rainfall extremes than the under-representation of first-order persistence. The developed generator appears to be a sound option for daily rainfall simulation, especially in particular hydrologic planning situations when rare rainfall events are of great importance.

Li, Chao .; Singh, Vijay P.; Mishra, Ashok K.

2013-02-06T23:59:59.000Z

290

An Extension of a Linguistic Negation Model Allowing Us to Deny Nuanced Property Combinations  

Science Conference Proceedings (OSTI)

In this paper, we improve the abilities of a previous model of representation of vague information expressed under an affirmative or negative form. The study more especially insists on information referring to linguistic negation. The extended definition ...

Daniel Pacholczyk

1999-07-01T23:59:59.000Z

291

Addition of Bevacizumab to Standard Radiation Therapy and Daily Temozolomide Is Associated With Minimal Toxicity in Newly Diagnosed Glioblastoma Multiforme  

SciTech Connect

Purpose: To determine the safety of the addition of bevacizumab to standard radiation therapy and daily temozolomide for newly diagnosed glioblastoma multiforme (GBM). Methods and Materials: A total of 125 patients with newly diagnosed GBM were enrolled in the study, and received standard radiation therapy and daily temozolomide. All patients underwent a craniotomy and were at least 2 weeks postoperative. Radiation therapy was administered in 1.8-Gy fractions, with the clinical target volume for the primary course treated to a dose of 45 to 50.4 Gy, followed by a boost of 9 to 14.4 Gy, to a total dose of 59.4 Gy. Patients received temozolomide at 75 mg/m{sup 2} daily throughout the course of radiation therapy. Bevacizumab was given at 10 mg/kg intravenously every 14 days, beginning a minimum of 4 weeks postoperatively. Results: Of the 125 patients, 120 (96%) completed the protocol-specified radiation therapy. Five patients had to stop the protocol therapy, 2 patients with pulmonary emboli, and 1 patient each with a Grade 2 central nervous system hemorrhage, Grade 4 pancytopenia, and wound dehiscence requiring surgical intervention. All 5 patients ultimately finished the radiation therapy. After radiation therapy, 3 patients had progressive disease, 2 had severe fatigue and decreased performance status, 1 patient had a colonic perforation, and 1 had a rectal fissure; these 7 patients therefore did not proceed with the protocol-specified adjuvant temozolomide, bevacizumab, and irinotecan. However, 113 patients (90%) were able to continue on study. Conclusions: The addition of bevacizumab to standard radiation therapy and daily temozolomide was found to be associated with minimal toxicity in patients newly diagnosed with GBM.

Vredenburgh, James J., E-mail: vrede001@mc.duke.edu [Department of Medicine, Duke University Medical Center, Durham, NC (United States); Desjardins, Annick [Department of Neurology, Duke University Medical Center, Durham, NC (United States); Kirkpatrick, John P. [Department of Radiation Oncology, Duke University Medical Center, Durham, NC (United States); Reardon, David A. [Department of Surgery, Duke University Medical Center, Durham, NC (United States); Department of Pediatrics, Duke University Medical Center, Durham, NC (United States); Peters, Katherine B. [Department of Neurology, Duke University Medical Center, Durham, NC (United States); Herndon, James E.; Marcello, Jennifer [Department of Cancer Center Biostatistics, Duke University Medical Center, Durham, NC (United States); Bailey, Leighann; Threatt, Stevie; Sampson, John; Friedman, Allan [Department of Surgery, Duke University Medical Center, Durham, NC (United States); Friedman, Henry S. [Department of Surgery, Duke University Medical Center, Durham, NC (United States); Department of Pediatrics, Duke University Medical Center, Durham, NC (United States)

2012-01-01T23:59:59.000Z

292

Compact multiple-valued multiplexers using negative differential resistance devices  

E-Print Network (OSTI)

Abstract-Quantum electronic devices with negative differen-tial resistance (NDR) characteristics have been used to design compact multiplexers. These multiplexers may be used either as analog multiplexers where the signal on a single select line selects one out of four analog inputs, or as four-valued logic multiplexers where the select line and the input lines represent one of four quantized signal values and the output line corre-sponds to the selected input. Any four-valued logic function can be implemented using only four-valued multiplexers (also known as T-gates), and this T-gate uses just 13 devices (transistors) as compared to 44 devices in CMOS. The design of the T-gate was done using a combination of resonant tunneling diodes (RTD’s) and heterojunction bipolar transistors (HBT’s) with the folded I-V characteristic (NDR characteristic) of the RTD’s providing the compact logic implementation and the HBT’s providing the gain and isolation. The application of the same design principles to the design of T-gates using other NDR devices such as reso-nant tunneling hot electron transistors (RHET’s) and resonant tunneling bipolar transistors (RTBT’s) is also demonstrated. I.

H. L. Chan; S. Mohan; Pinaki Mazumder; Senior Member; George I. Haddad

1996-01-01T23:59:59.000Z

293

Electromagnetic plane waves with negative phase velocity in charged black strings  

SciTech Connect

We investigate the propagation regions of electromagnetic plane waves with negative phase velocity in the ergosphere of static charged black strings. For such a propagation, some conditions for negative phase velocity are established that depend on the metric components and the choice of the octant. We conclude that these conditions remain unaffected by the negative values of the cosmological constant.

Sharif, M., E-mail: msharif.math@pu.edu.pk; Manzoor, R., E-mail: rubabmanzoor9@yahoo.com [University of the Punjab, Department of Mathematics (Pakistan)

2013-02-15T23:59:59.000Z

294

Dust negative ion acoustic shock waves considering dust size distribution effect  

Science Conference Proceedings (OSTI)

A multi-ion dusty plasma containing hot isothermal electrons, ions (light positive ions and heavy negative ions), and extremely and negatively charged dust grains is studied in the present paper. The dust negative ion acoustic shock waves have been investigated by employing the reductive perturbation method. How the dust size distribution affects the height and the thickness of the nonlinear shock wave is studied. It is noted that the different dust size distribution has different shock wave form and different moving speed.

Ma Yirong; Wang Canglong; Zhang Jianrong; Sun Jianan; Duan Wenshan [College of Physics and Electronic Engineering and Joint Laboratory of Atomic and Molecular Physics of NWNU and IMP CAS, Northwest Normal University, Lanzhou 730070, China and Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China); Yang Lei [College of Physics and Electronic Engineering and Joint Laboratory of Atomic and Molecular Physics of NWNU and IMP CAS, Northwest Normal University, Lanzhou 730070 (China) and Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000 (China); Department of Physics, Lanzhou University, Lanzhou 730000 (China)

2012-11-15T23:59:59.000Z

295

Effect of fast positive ions incident on caesiated plasma grid of negative ion source  

SciTech Connect

This paper describes the effect on negative ion formation on a caesiated surface of the backscattering of positive ions approaching it with energy of a few tens of eV. For a positive ion energy of 45 eV, the surface produced negative ion current density due to these fast positive ions is 12 times larger than that due to thermal atoms, thus dominating the negative ion surface production instead of the thermal atoms, as considered until now.

Bacal, M. [LPP, Ecole Polytechnique, Palaiseau, UPMC, Universite PARIS-SUD 11, UMR CNRS 7648 (France)

2012-02-15T23:59:59.000Z

296

Real-Time Forcast Model Analysis of Daily Average Building Load for a Thermal Storage System Control  

E-Print Network (OSTI)

Thermal storage systems were originally designed to shift the on-peak cooling production to off-peak cooling production to reduce the on-peak demand. Based on the current electricity charging structure, the reduction of both on-peak and off-peak demands is becoming an exceedingly important issue. Reduction of both on-peak and off-peak demands can also extend the life span and defer or eliminate the replacement of power transformers due to potential shortage of building power capacity with anticipated equipment load increases. The next day daily average electricity demand is a critical set point to operate chillers and associated pumps at the appropriate time. For this paper, a mathematic analysis was conducted for annual daily average cooling of a building and three real-time building load forecasting models were developed. They are first-order autogressive model, random walk model and linear regression model. Finally, the comparison of results show the random walk model provides the best forecast.

Song, L.; Joo, I. S.; Guwana, S.

2009-11-01T23:59:59.000Z

297

Negative Equity Does Not Reduce Homeowners’ Mobility,” Working Paper 682, Federal Reserve Bank of Minneapolis  

E-Print Network (OSTI)

Some commentators have argued that the housing crisis may harm labor markets because homeowners who owe more than their homes are worth are less likely to move to places that have productive job opportunities. I show that, in the available data, negative equity does not make homeowners less mobile. In fact, homeowners who have negative equity are slightly more likely to move than homeowners who have positive equity. Ferreira, Gyourko, and Tracy’s (2010) contrasting result that negative equity reduces mobility arises because they systematically drop some negative-equity homeowners ’ moves from the data.

Sam Schulhofer-wohl; Schulhofer-wohl Federal; Reserve Bank Minneapolis; I Andra Ghent

2010-01-01T23:59:59.000Z

298

COMBATING THE NEGATIVE IMAGE OF THE CITY USING MARKETING: THE CASE FOR GARY, INDIANA.  

E-Print Network (OSTI)

??Cities, like brands, have images associated with them. Many cities suffer from negative images, and a myriad of issues can contribute to their poor image.… (more)

BONANNO, ANTHONY T

2005-01-01T23:59:59.000Z

299

A Comparison of CMIP3 Simulations of Precipitation over North America with Observations: Daily Statistics and Circulation Features Accompanying Extreme Events  

Science Conference Proceedings (OSTI)

Climate model simulations of daily precipitation statistics from the third phase of the Coupled Model Intercomparison Project (CMIP3) were evaluated against precipitation observations from North America over the period 1979–99. The evaluation ...

Anthony M. DeAngelis; Anthony J. Broccoli; Steven G. Decker

2013-05-01T23:59:59.000Z

300

A Comparison among Strategies for Interpolating Maximum and Minimum Daily Air Temperatures. Part II: The Interaction between Number of Guiding Variables and the Type of Interpolation Method  

Science Conference Proceedings (OSTI)

In a comparative experiment, the sequence of daily maximum and minimum temperatures for 1976 was interpolated over England and Wales to a resolution of 1 km using partial thin plate splines, ordinary kriging, trend surface, and an automatic ...

Claire H. Jarvis; Neil Stuart

2001-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Evaluation of the AR4 Climate Models’ Simulated Daily Maximum Temperature, Minimum Temperature, and Precipitation over Australia Using Probability Density Functions  

Science Conference Proceedings (OSTI)

The coupled climate models used in the Fourth Assessment Report of the Intergovernmental Panel on Climate Change are evaluated. The evaluation is focused on 12 regions of Australia for the daily simulation of precipitation, minimum temperature, ...

S. E. Perkins; A. J. Pitman; N. J. Holbrook; J. McAneney

2007-09-01T23:59:59.000Z

302

A Comparison among Strategies for Interpolating Maximum and Minimum Daily Air Temperatures. Part I: The Selection of “Guiding” Topographic and Land Cover Variables  

Science Conference Proceedings (OSTI)

This paper explores the derivation and selection of a comprehensive set of continuous topographic and land cover–related variables to guide the interpolation of daily maximum and minimum temperatures over England and Wales, for an entire annual ...

Claire H. Jarvis; Neil Stuart

2001-06-01T23:59:59.000Z

303

Assessment of Reanalysis Daily Extreme Temperatures with China’s Homogenized Historical Dataset during 1979–2001 Using Probability Density Functions  

Science Conference Proceedings (OSTI)

Using a recently homogenized observational daily maximum (TMAX) and minimum temperature (TMIN) dataset for China, the extreme temperatures from the 40-yr ECMWF Re-Analysis (ERA-40), the Japanese 25-year Reanalysis (JRA-25), the NCEP/Department of ...

Jiafu Mao; Xiaoying Shi; Lijuan Ma; Dale P. Kaiser; Qingxiang Li; Peter E. Thornton

2010-12-01T23:59:59.000Z

304

Estimation of daily actual evapotranspiration from remotely sensed data under complex terrain over the upper Chao river basin in North China  

Science Conference Proceedings (OSTI)

Daily actual evapotranspiration over the upper Chao river basin in North China on 23 June 2005 was estimated based on the Surface Energy Balance Algorithm for Land (SEBAL), in which the parameterization schemes for calculating the instantaneous solar ...

Yanchun Gao; Di Long; Zhao-Liang Li

2008-06-01T23:59:59.000Z

305

Mean and Variability of the WHOI Daily Latent and Sensible Heat Fluxes at In Situ Flux Measurement Sites in the Atlantic Ocean  

Science Conference Proceedings (OSTI)

Daily latent and sensible heat fluxes for the Atlantic Ocean from 1988 to 1999 with 1° × 1° resolution have been recently developed at Woods Hole Oceanographic Institution (WHOI) by using a variational object analysis approach. The present study ...

Lisan Yu; Robert A. Weller; Bomin Sun

2004-06-01T23:59:59.000Z

306

Wormholes, Gamma Ray Bursts and the Amount of Negative Mass in the Universe  

E-Print Network (OSTI)

In this essay, we assume that negative mass objects can exist in the extragalactic space and analyze the consequences of their microlensing on light from distant Active Galactic Nuclei. We find that such events have very similar features to some observed Gamma Ray Bursts and use recent satellite data to set an upper bound to the amount of negative mass in the universe.

Diego F. Torres; Gustavo E. Romero; Luis A. Anchordoqui

1998-05-19T23:59:59.000Z

307

We are not equally negative: fine-grained labeling for multimedia event detection  

Science Conference Proceedings (OSTI)

Multimedia event detection (MED) is an effective technique for video indexing and retrieval. Current classifier training for MED treats the negative videos equally. However, many negative videos may resemble the positive videos in different degrees. ... Keywords: attribute representation, attribute selection, fine-grained labeling, multi-source attributes, multimedia event detection (MED)

Zhigang Ma; Yi Yang; Zhongwen Xu; Nicu Sebe; Alexander G. Hauptmann

2013-10-01T23:59:59.000Z

308

On estimation and influence diagnostics for zero-inflated negative binomial regression models  

Science Conference Proceedings (OSTI)

The zero-inflated negative binomial model is used to account for overdispersion detected in data that are initially analyzed under the zero-inflated Poisson model. A frequentist analysis, a jackknife estimator and a non-parametric bootstrap for parameter ... Keywords: Bootstrap, EM algorithm, Global influence, Local influence, Negative binomial distribution, Zero-inflated models

Aldo M. Garay; Elizabeth M. Hashimoto; Edwin M. M. Ortega; Víctor H. Lachos

2011-03-01T23:59:59.000Z

309

Electron beam lithography at 10keV using an epoxy based high resolution negative resist  

Science Conference Proceedings (OSTI)

The behaviour of a new epoxy based resist (mr-EBL 6000.1 XP) as a negative resist for e-beam lithography is presented. We demonstrate that it is possible to define sub-100nm patterns when irradiating thin (120nm) layers of resist with a 10keV electron ... Keywords: EBL, Nanopatterning, Negative resist, Polymer technology

C. Martin; G. Rius; A. Llobera; A. Voigt; G. Gruetzner; F. Pérez-Murano

2007-05-01T23:59:59.000Z

310

Estimation of the shape parameter k of the negative binomial distribution  

Science Conference Proceedings (OSTI)

Using approximate Bayesian methods, an estimator of the shape parameter of the negative binomial distribution is introduced. Most of the available estimators of this parameter, such as the method of moment and the maximum likelihood estimators (MME and ... Keywords: Bayes-like estimator, maximum likelihood estimator, method of moments estimator, negative binomial distribution

Mohammad F. Al-Saleh; Fatima K. Al-Batainah

2003-11-01T23:59:59.000Z

311

NIAMEY DAILY RAINFALL  

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

October for the years 2004 (blue), 2005 (pink), and 2006 (green) indicate a dry monsoon season for 2006. NIAMEY MONTHLY RAINFALL April-October, 2006 vs. 1941-2000 Long-term...

312

Ichetucknee Daily Activities  

E-Print Network (OSTI)

the beautiful, crystal clear water of the Ichetucknee River while you relax in an inner tube. Enjoy the Florida

Príncipe, José Carlos

313

Ion beam driven ion-acoustic waves in a plasma cylinder with negatively charged dust grains  

SciTech Connect

An ion beam propagating through a magnetized potassium plasma cylinder having negatively charged dust grains drives electrostatic ion-acoustic waves to instability via Cerenkov interaction. The phase velocity of sound wave increases with the relative density of negatively charged dust grains. The unstable wave frequencies and the growth rate increase, with the relative density of negatively charged dust grains. The growth rate of the unstable mode scales as one-third power of the beam density. The real part of frequency of the unstable mode increases with the beam energy and scales as almost the one-half power of the beam energy.

Sharma, Suresh C.; Walia, Ritu [Department of Physics, Maharaja Agrasen Institute of Technology, PSP Area Plot No.-1, Sector-22, Rohini, Delhi 110 086 (India); Sharma, Kavita [Department of Physics, Bhagwan Parshuram Institute of Technology, Sector-17, Rohini, New Delhi 110 089 (India)

2012-07-15T23:59:59.000Z

314

Negative azimuthal force of a nanofiber-guided light on a particle  

E-Print Network (OSTI)

We calculate the force of a quasicircularly polarized guided light field of a nanofiber on a dielectric spherical particle. We show that the orbital parts of the axial and azimuthal components of the Poynting vector are always positive while the spin parts can be either positive or negative. We find that, for appropriate values of the size parameter of the particle, the azimuthal component of the force is directed oppositely to the circulation direction of the energy flow around the nanofiber. The occurrence of such a negative azimuthal force indicates that the particle undergoes a negative torque.

Kien, Fam Le

2013-01-01T23:59:59.000Z

315

A Comparison of Analysis and Forecast Correction Techniques:Impact of Negative Dissipation  

Science Conference Proceedings (OSTI)

The impact of negative dissipation on posttime analysis and forecast correction techniques is examined in a simplified context. The experiments are conducted using a three-level quasigeostrophic model (with a nonsingular tangent propagator matrix)...

Carolyn A. Reynolds

1999-11-01T23:59:59.000Z

316

Hypothesizing about causal networks with positive and negative effects by meta-level abduction  

Science Conference Proceedings (OSTI)

Meta-level abduction discovers missing links and unknown nodes from incomplete networks to complete paths for observations. In this work, we extend applicability of meta-level abduction to deal with networks containing both positive and negative causal ...

Katsumi Inoue; Andrei Doncescu; Hidetomo Nabeshima

2010-06-01T23:59:59.000Z

317

Which Is Better, an Ensemble of Positive–Negative Pairs or a Centered Spherical Simplex Ensemble?  

Science Conference Proceedings (OSTI)

New methods to center the initial ensemble perturbations on the analysis are introduced and compared with the commonly used centering method of positive–negative paired perturbations. In the new method, one linearly dependent perturbation is ...

Xuguang Wang; Craig H. Bishop; Simon J. Julier

2004-07-01T23:59:59.000Z

318

Query processing using negative and temporal tuples in stream query engines  

Science Conference Proceedings (OSTI)

In this paper, we analyze how stream monotonicity classification can be adopted for the introduced developed model, which processes both temporal and negative events. As we show, information about stream monotonicity can be easily used to optimize individual ...

Marcin Gorawski; Aleksander Chrószcz

2009-10-01T23:59:59.000Z

319

High electronegativity multi-dipolar electron cyclotron resonance plasma source for etching by negative ions  

SciTech Connect

A large area plasma source based on 12 multi-dipolar ECR plasma cells arranged in a 3 x 4 matrix configuration was built and optimized for silicon etching by negative ions. The density ratio of negative ions to electrons has exceeded 300 in Ar/SF{sub 6} gas mixture when a magnetic filter was used to reduce the electron temperature to about 1.2 eV. Mass spectrometry and electrostatic probe were used for plasma diagnostics. The new source is free of density jumps and instabilities and shows a very good stability for plasma potential, and the dominant negative ion species is F{sup -}. The magnetic field in plasma volume is negligible and there is no contamination by filaments. The etching rate by negative ions measured in Ar/SF{sub 6}/O{sub 2} mixtures was almost similar with that by positive ions reaching 700 nm/min.

Stamate, E. [Department of Energy Conversion and Storage, Technical University of Denmark, Frederiksborgvej 399, Roskilde 4000 (Denmark); Draghici, M. [Infineon Technologies Austria AG, Siemensstrasse 2, Villach 9500 (Austria)

2012-04-15T23:59:59.000Z

320

Formation of negative hydrogen ion: Polarization electron capture and nonthermal shielding  

Science Conference Proceedings (OSTI)

The influence of the nonthermal shielding on the formation of the negative hydrogen ion (H{sup -}) by the polarization electron capture are investigated in partially ionized generalized Lorentzian plasmas. The Bohr-Lindhard method has been applied to obtain the negative hydrogen formation radius and cross section as functions of the collision energy, de Broglie wave length, Debye length, impact parameter, and spectral index of the plasma. The result shows that the nonthermal character of the plasma enhances the formation radius of the negative hydrogen, especially, for small Debye radii. It is found that the nonthermal effect increases the formation cross section of the negative hydrogen. It is also found that the maximum position of the formation cross section approaches to the collision center with an increase of the spectral index. In addition, it is found that the formation cross section significantly decreases with an increase of the Debye length, especially, for small spectral indices.

Ki, Dae-Han [Department of Applied Physics, Hanyang University, Ansan, Kyunggi-Do 426-791 (Korea, Republic of); Jung, Young-Dae [Department of Applied Physics, Hanyang University, Ansan, Kyunggi-Do 426-791 (Korea, Republic of); Department of Bio-Nano Technology, Hanyang University, Ansan, Kyunggi-Do 426-791 (Korea, Republic of); Department of Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, 110 Eighth Street, Troy, New York 12180-3590 (United States)

2012-09-07T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Return-Stroke Multiplicity of Negative Cloud-to-Ground Lightning Flashes  

Science Conference Proceedings (OSTI)

The percentage of negative lightning flashes composed of a single stroke is examined. This percentage is estimated from data reported by the U.S. National Lightning Detection Network (NLDN) for Florida and New Mexico and is compared with that ...

Vladimir A. Rakov; Gary R. Huffines

2003-10-01T23:59:59.000Z

322

An adaptive grid refinement strategy for the simulation of negative streamers  

Science Conference Proceedings (OSTI)

The evolution of negative streamers during electric breakdown of a non-attaching gas can be described by a two-fluid model for electrons and positive ions. It consists of continuity equations for the charged particles including drift, diffusion and reaction ... Keywords: 52.25.Aj, 52.35.Mw, 52.65.Kj, 52.80.Mj, Adaptive grid refinements, Elliptic-parabolic system, Finite volumes, Negative streamers, Pulled front

C. Montijn; W. Hundsdorfer; U. Ebert

2006-12-01T23:59:59.000Z

323

Gaussian measures of entanglement versus negativities: Ordering of two-mode Gaussian states  

SciTech Connect

We study the entanglement of general (pure or mixed) two-mode Gaussian states of continuous-variable systems by comparing the two available classes of computable measures of entanglement: entropy-inspired Gaussian convex-roof measures and positive partial transposition-inspired measures (negativity and logarithmic negativity). We first review the formalism of Gaussian measures of entanglement, adopting the framework introduced in M. M. Wolf et al., Phys. Rev. A 69, 052320 (2004), where the Gaussian entanglement of formation was defined. We compute explicitly Gaussian measures of entanglement for two important families of nonsymmetric two-mode Gaussian state: namely, the states of extremal (maximal and minimal) negativities at fixed global and local purities, introduced in G. Adesso et al., Phys. Rev. Lett. 92, 087901 (2004). This analysis allows us to compare the different orderings induced on the set of entangled two-mode Gaussian states by the negativities and by the Gaussian measures of entanglement. We find that in a certain range of values of the global and local purities (characterizing the covariance matrix of the corresponding extremal states), states of minimum negativity can have more Gaussian entanglement of formation than states of maximum negativity. Consequently, Gaussian measures and negativities are definitely inequivalent measures of entanglement on nonsymmetric two-mode Gaussian states, even when restricted to a class of extremal states. On the other hand, the two families of entanglement measures are completely equivalent on symmetric states, for which the Gaussian entanglement of formation coincides with the true entanglement of formation. Finally, we show that the inequivalence between the two families of continuous-variable entanglement measures is somehow limited. Namely, we rigorously prove that, at fixed negativities, the Gaussian measures of entanglement are bounded from below. Moreover, we provide some strong evidence suggesting that they are as well bounded from above.

Adesso, Gerardo; Illuminati, Fabrizio [Dipartimento di Fisica 'E. R. Caianiello', Universita di Salerno, CNR-Coherentia, Gruppo di Salerno (Italy); INFN Sezione di Napoli-Gruppo Collegato di Salerno, Via S. Allende, 84081 Baronissi, SA (Italy)

2005-09-15T23:59:59.000Z

324

Electromagnetic wave propagation with negative phase velocity in regular black holes  

SciTech Connect

We discuss the propagation of electromagnetic plane waves with negative phase velocity in regular black holes. For this purpose, we consider the Bardeen model as a nonlinear magnetic monopole and the Bardeen model coupled to nonlinear electrodynamics with a cosmological constant. It turns out that the region outside the event horizon of each regular black hole does not support negative phase velocity propagation, while its possibility in the region inside the event horizon is discussed.

Sharif, M., E-mail: msharif.math@pu.edu.pk; Manzoor, R., E-mail: rubabmanzoor9@yahoo.com [University of the Punjab, Department of Mathematics (Pakistan)

2012-12-15T23:59:59.000Z

325

Gaussian measures of entanglement versus negativities: the ordering of two-mode Gaussian states  

E-Print Network (OSTI)

In this work we focus on entanglement of two--mode Gaussian states of continuous variable systems. We first review the formalism of Gaussian measures of entanglement, adopting the framework developed in [M. M. Wolf {\\em et al.}, Phys. Rev. A {\\bf 69}, 052320 (2004)], where the Gaussian entanglement of formation was defined. We compute Gaussian measures explicitely for two important families of nonsymmetric two--mode Gaussian states, namely the states of extremal (maximal and minimal) negativities at fixed global and local purities, introduced in [G. Adesso {\\em et al.}, Phys. Rev. Lett. {\\bf 92}, 087901 (2004)]. This allows us to compare the {\\em orderings} induced on the set of entangled two--mode Gaussian states by the negativities and by the Gaussian entanglement measures. We find that in a certain range of global and local purities (characterizing the covariance matrix of the corresponding extremal states), states of minimum negativity can have more Gaussian entanglement than states of maximum negativity. Thus Gaussian measures and negativities are definitely inequivalent on nonsymmetric two--mode Gaussian states (even when restricted to extremal states), while they are completely equivalent on symmetric states, where moreover the Gaussian entanglement of formation coincides with the true one. However, the inequivalence between these two families of continuous-variable entanglement measures is somehow limited. In fact we show rigorously that, at fixed negativities, the Gaussian entanglement measures are bounded from below, and we provide strong evidence that they are also bounded from above.

Gerardo Adesso; Fabrizio Illuminati

2005-06-15T23:59:59.000Z

326

Relative Accuracy of 1-Minute and Daily Total Solar Radiation Data for 12 Global and 4 Direct Beam Solar Radiometers  

Science Conference Proceedings (OSTI)

We evaluated the relative performance of 12 global and four direct beam solar radiometers deployed at a single site over a 12-month period. Test radiometer irradiances were compared with a reference irradiance consisting of either an absolute cavity radiometer (during calibrations) or a low uncertainty thermopile pyrheliometer (during the evaluation period) for pyrheliometers; and for pyranometers a reference global irradiance computed from the reference pyrheliometer and diffuse irradiance from a shaded pyranometer. One minute averages of 3-second data for 12 months from the test instrument measurements were compared with the computed reference data set. Combined uncertainty in the computed reference irradiance is 1.8% {+-} 0.5%. Total uncertainty in the pyranometer comparisons is {+-}2.5%. We show mean percent difference between reference global irradiance and test pyranometer 1 minute data as a function of zenith angle, and percent differences between daily totals for the reference and test irradiances as a function of day number. We offer no explicit conclusion about the performance of instrument models, as a general array of applications with a wide range of instrumentation and accuracy requirements could be addressed with any of the radiometers.

Myers, D.; Wilcox, S. M.

2009-01-01T23:59:59.000Z

327

The Daily Behavior of Pressure and Its Influence on the Wind Regime in East Antarctica during the Winters of 1993 and 1994  

Science Conference Proceedings (OSTI)

The analysis of surface pressure data obtained in 1993–94 at the Dumont d'Urville meteorological station and at Automatic Weather Stations Dome C, D-47, and D-80 (East Antarctica) shows the existence of a daily variation. Power spectra are ...

Igor V. Petenko; Stefania Argentini

2001-07-01T23:59:59.000Z

328

Validation of Satellite-Derived Daily Latent-Heat Flux over the South China Sea, Compared with Observations and Five Products  

Science Conference Proceedings (OSTI)

We have developed the South China Sea (SCS) daily satellite-derived latent-heat flux (SCSSLH) for the period of 1998 to 2011 at 0.25°×0.25° resolution using data mainly from the Tropical Rain Measuring Mission (TRMM) Microwave Imager (TMI). Flux-...

Dongxiao Wang; Lili Zeng; Xixi Li; Ping Shi

329

Negative plasma potential in a multidipole chamber with a dielectric coated plasma boundary  

SciTech Connect

Negative plasma potentials with respect to a grounded wall that was coated with a dielectric have been achieved in an electropositive plasma confined by a multidipole device. A Langmuir probe was used to measure the density and temperatures of the bi-Maxwellian distribution electrons and an emissive probe was used to measure the plasma potential profile near the plasma boundary. For many discharge parameters, the potential profile was that of a typical electropositive sheath, but it was shifted negative due to negative charge accumulated on the plasma-surface boundary. A virtual cathode was observed near the boundary when the neutral pressure, primary electron energy, and/or discharge current were low ({approx}2 x 10{sup -4} Torr, {approx}60 eV, and 80 mA, respectively). The behavior of the sheath potential was shown to be consistent with that predicted by particle balance and a qualitative mechanism for wall charging is presented.

Sheehan, J. P.; Hershkowitz, Noah [Department of Nuclear Engineering and Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)

2012-05-15T23:59:59.000Z

330

Chinese Restaurant Game - Part I: Theory of Learning with Negative Network Externality  

E-Print Network (OSTI)

In a social network, agents are intelligent and have the capability to make decisions to maximize their utilities. They can either make wise decisions by taking advantages of other agents' experiences through learning, or make decisions earlier to avoid competitions from huge crowds. Both these two effects, social learning and negative network externality, play important roles in the decision process of an agent. While there are existing works on either social learning or negative network externality, a general study on considering both these two contradictory effects is still limited. We find that the Chinese restaurant process, a popular random process, provides a well-defined structure to model the decision process of an agent under these two effects. By introducing the strategic behavior into the non-strategic Chinese restaurant process, in Part I of this two-part paper, we propose a new game, called Chinese Restaurant Game, to formulate the social learning problem with negative network externality. Throu...

Wang, Chih-Yu; Li, K J Ray

2011-01-01T23:59:59.000Z

331

Photodissociation and charge transfer dynamics of negative ions studied with femtosecond photoelectron spectroscopy  

Science Conference Proceedings (OSTI)

This dissertation presents studies aimed at understanding the potential energy surfaces and dynamics of isolated negative ions, and the effects of solvent on each. Although negative ions play important roles in atmospheric and solution phase chemistry, to a large extent the ground and excited state potential energy surfaces of gas phase negative ions are poorly characterized, and solvent effects even less well understood. In an effort to fill this gap, the author's coworkers and the author have developed a new technique, anion femtosecond photoelectron spectroscopy, and applied it to gas phase photodissociation and charge transfer processes. Studies are presented that (1) characterize the ground and excited states of isolated and clustered anions, (2) monitor the photodissociation dynamics of isolated and clustered anions, and (3) explore the charge-transfer-to-solvent states of atomic iodide clustered with polar and non-polar solvents.

Zanni, Martin T.

1999-12-17T23:59:59.000Z

332

Study of Compact Tunable Filters Using Negative Refractive Index Transmission Lines  

E-Print Network (OSTI)

Today's microwave circuits, whether for communication, radar, or testing systems, need compact tunable microwave filters. Since different microwave circuit applications have radically different size, power, insertion loss, rejection, vibration, and thermal requirements, new filter technologies with different balances between these requirements are always desirable. Negative Refractive Index (NRI) transmission media was discovered 10 years ago with the unique property of negative phase propagation. A literature review was conducted to identify potential NRI methods for filters and other devices, but no NRI tunable filters were found. To address this gap, a family of tunable NRI bandpass filters was simulated and constructed successfully using end-coupled zeroth order resonators. Tuning was accomplished by controlling the negative phase length of the NRI sections with varactors. The resulting L-band filters exhibited a 25-40 percent tunable range, no higher order resonances, and required only one fourth the length of a coupled-line filter constructed from traditional 180 degree microstrip resonators.

Lewis, Brian Patrick

2011-05-01T23:59:59.000Z

333

Method for resurrecting negative electron affinity photocathodes after exposure to an oxidizing gas  

Science Conference Proceedings (OSTI)

A method by which negative electron affinity photocathodes (201), single crystal, amorphous, or otherwise ordered, can be made to recover their quantum yield following exposure to an oxidizing gas has been discovered. Conventional recovery methods employ the use of cesium as a positive acting agent (104). In the improved recovery method, an electron beam (205), sufficiently energetic to generate a secondary electron cloud (207), is applied to the photocathode in need of recovery. The energetic beam, through the high secondary electron yield of the negative electron affinity surface (203), creates sufficient numbers of low energy electrons which act on the reduced-yield surface so as to negate the effects of absorbed oxidizing atoms thereby recovering the quantum yield to a pre-decay value.

Mulhollan, Gregory A; Bierman, John C

2012-10-30T23:59:59.000Z

334

Maximizing Ion Current by Space Charge Neutralization using Negative Ions and Dust Particles  

DOE Green Energy (OSTI)

Ion current extracted from an ion source (ion thruster) can be increased above the Child-Langmuir limit if the ion space charge is neutralized. Similarly, the limiting kinetic energy density of the plasma flow in a Hall thruster might be exceeded if additional mechanisms of space charge neutralization are introduced. Space charge neutralization with high-mass negative ions or negatively charged dust particles seems, in principle, promising for the development of a high current or high energy density source of positive light ions. Several space charge neutralization schemes that employ heavy negatively charged particles are considered. It is shown that the proposed neutralization schemes can lead, at best, only to a moderate but nonetheless possibly important increase of the ion current in the ion thruster and the thrust density in the Hall thruster.

A. Smirnov; Y. Raitses; N.J. Fisch

2005-01-25T23:59:59.000Z

335

Vacuum insulation of the high energy negative ion source for fusion application  

Science Conference Proceedings (OSTI)

Vacuum insulation on a large size negative ion accelerator with multiple extraction apertures and acceleration grids for fusion application was experimentally examined and designed. In the experiment, vacuum insulation characteristics were investigated in the JT-60 negative ion source with >1000 apertures on the grid with the surface area of {approx}2 m{sup 2}. The sustainable voltages varied with a square root of the gap lengths between the grids, and decreased with number of the apertures and with the surface area of the grids. Based on the obtained results, the JT-60SA (super advanced) negative ion source is designed to produce 22 A, 500 keV D{sup -} ion beams for 100 s.

Kojima, A.; Hanada, M.; Inoue, T.; Watanabe, K.; Taniguchi, M.; Kashiwagi, M.; Umeda, N.; Tobari, H. [Japan Atomic Energy Agency, Naka, Ibaraki 311-0193 (Japan); Hilmi, A.; Kobayashi, S.; Yamano, Y. [Saitama University, Saitama, Saitama-ken, 338-8570 (Japan); Grisham, L. R. [Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543 (United States)

2012-02-15T23:59:59.000Z

336

Effect of Anticholinergic Medication on Positive and Negative Symptoms in Medication-Free Schizophrenic Patients  

E-Print Network (OSTI)

Abstract. It is generally assumed that anticholinergic drugs have no effects on schizophrenic symptomatology. A few studies, however, indicate that anticholinergic agents aggravate psychotic symptoms and antagonize therapeutic effects of neuroleptics in schizophrenic patients; more recently, some investigators have observed that these agents appear to benefit negative symptoms. In an effort to resolve this issue, we studied the effects of 2 days of treatment with biperiden on positive and negative symptoms in 15 medication-free schizophrenic patients. Positive symptoms increased significantly, while there was a trend toward a decrease in negative symptoms. The implications of these findings for the role of the cholinergic system in schizophrenia are discussed. Key Words. Biperiden, cholinergic system, schizophrenia, positive symptoms. Anticholinergic drugs are commonly used in the treatment of extrapyramidal side effects, which frequently accompany neuroleptic treatment in schizophrenia. It is assumed that anticholinergic drugs do not affect schizophrenic symptomatology, and

Rajiv Tandon; Nancy A. Mann; William H. Eisner

1989-01-01T23:59:59.000Z

337

Handbook of solar energy data for south-facing surfaces in the United States. Volume III. Average hourly and total daily insolation data for 235 localities (North Carolina - Wyoming)  

DOE Green Energy (OSTI)

Average hourly and daily total insolation estimates are given for 235 US sites at a variety of array tilt angles. (MHR)

Smith, J.H.

1980-01-15T23:59:59.000Z

338

DOE/EA-1680: Environmental Assessment and Initial Study/Proposed Mitigated Negative Declaration (March 2009)  

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

Engineered Geothermal Enhancement Engineered Geothermal Enhancement System Demonstration Project Environmental Assessment and Initial Study/Proposed Mitigated Negative Declaration March 2009 Prepared for The Bureau of Land Management 2550 North State Street Ukiah, CA 95482 Northern California Power Agency 651 Commerce Drive Roseville, CA 95678 Prepared by ICF Jones & Stokes 630 K Street, Suite 400 Sacramento, CA 95814 Environmental Assessment and Initial Study/Proposed Mitigated Negative Declaration Engineered Geothermal Enhancement System Demonstration Project March 2009 i Table of Contents Page Table of Contents ........................................................................................................................................... i List of Figures .............................................................................................................................................. iv

339

Experimental verification of Boltzmann equilibrium for negative ions in weakly collisional electronegative plasmas  

Science Conference Proceedings (OSTI)

Weakly collisional Ar-O{sub 2} electronegative plasmas are investigated in a dc multidipole chamber. An electronegative core and an electropositive halo are observed. The density ratio of negative ions to electrons ({alpha}) in the nondrifting bulk is found to be 0.43. The profile of {alpha} is found using both the phase velocity of ion acoustic waves and the drift velocity of positive ions determined by laser-induced fluorescence. The experiment shows that negative ions are in Boltzmann equilibrium with a temperature of 0.06{+-}0.02 eV. Double layers are not found separating the electronegative core and the electropositive halo.

Ghim, Young-chul [Department of Physics, University of Oxford, Oxford OX1 3NP (United Kingdom); Hershkowitz, Noah [Department of Engineering Physics, University of Wisconsin-Madison, Madison, Wisconsin 53706 (United States)

2009-04-13T23:59:59.000Z

340

Symmetrical sequence contours: a method for bench-testing negative sequence detecting relays  

Science Conference Proceedings (OSTI)

Symmetrical Components is a topic which even a graduate electrical engineer, who took a course on the subject, may not completely understand. Workers who maintain protective relays may have little knowledge of Symmetrical Components. The result of this unfamiliarity may be that relays such as those which respond to negative sequence voltages are never again tested properly, or readjusted to a more desireable setting, after leaving the manufacturer. The intent of this paper is to present a method of bench-testing negative sequence detecting devices by individuals who possess little knowledge of Symmetrical Components.

Yanniello, R.

1983-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Non-magnetic nano-composites for optical and infrared negative refraction index media  

E-Print Network (OSTI)

We develop an approach to use nanostructured plasmonic materials as a non-magnetic negative-refractive index system at optical and near-infrared frequencies. In contrast to conventional negative refraction materials, our design does not require periodicity and thus is highly tolerant to fabrication defects. Moreover, since the proposed materials are intrinsically non-magnetic, their performance is not limited to proximity of a resonance so that the resulting structure has relatively low loss. We develop the analytical description of the relevant electromagnetic phenomena and justify our analytic results via numerical solutions of Maxwell equations.

Robyn Wangberg; Justin Elser; Evgenii E. Narimanov; Viktor A. Podolskiy

2005-06-27T23:59:59.000Z

342

Self-organization of dissipationless solitons in positive- and negative-refractive-index materials  

Science Conference Proceedings (OSTI)

A generalized Ginzburg-Landau equation describing dissipative solitons dynamics in negative-refractive-index materials is derived from Maxwell equations. This equation having only real terms with opposite sign differs from the usual Ginzburg-Landau equation for positive-refractive-index media. A cross-compensation between the saturating nonlinearity excess, losses, and gain makes obtained self-organized solitons dissipationless and exceptionally robust. In the presence of such solitons medium becomes effectively dissipationless. The compensation of losses is of particular interest for media with resonant character of interactions like negative-refractive-index materials.

Skarka, V. [Laboratory POMA, CNRS FRE 2988, University Angers, 2, Boulevard Lavoisier, F-49045 Angers (France); Aleksic, N. B. [Institute of Physics, Pregrevica 118, 11000 Belgrade (Serbia); Berezhiani, V. I. [Andronikashvili Institute of Physics, 6 Tamarashvili, Tbilisi 0177 (Georgia)

2010-04-15T23:59:59.000Z

343

Negative ion beam injection apparatus with magnetic shield and electron removal means  

DOE Patents (OSTI)

A negative ion source is constructed to produce H.sup.- ions without using Cesium. A high percentage of secondary electrons that typically accompany the extracted H.sup.- are trapped and eliminated from the beam by permanent magnets in the initial stage of acceleration. Penetration of the magnetic field from the permanent magnets into the ion source is minimized. This reduces the destructive effect the magnetic field could have on negative ion production and extraction from the source. A beam expansion section in the extractor results in a strongly converged final beam.

Anderson, Oscar A. (Berkeley, CA); Chan, Chun F. (Hayward, CA); Leung, Ka-Ngo (Hercules, CA)

1994-01-01T23:59:59.000Z

344

T-633: BIND RRSIG RRsets Negative Caching Off-by-one Bug Lets Remote Users  

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

3: BIND RRSIG RRsets Negative Caching Off-by-one Bug Lets 3: BIND RRSIG RRsets Negative Caching Off-by-one Bug Lets Remote Users Deny Service T-633: BIND RRSIG RRsets Negative Caching Off-by-one Bug Lets Remote Users Deny Service May 31, 2011 - 3:35pm Addthis PROBLEM: A vulnerability was reported in BIND. A remote user can cause denial of service conditions. PLATFORM: BIND Version(s): 9.4-ESV-R3 and later, 9.6-ESV-R2 and later, 9.6.3, 9.7.1 and later, 9.8.0 and later; prior to 9.4-ESV-R4-P1, 9.6-ESV-R4-P1, 9.7.3-P1, 9.8.0-P2 ABSTRACT: A remote DNS server can supply very large RRSIG RRsets in a negative response to trigger an off-by-one error in a buffer size check and cause the target requesting named process to crash. A remote user can cause named to crash. reference LINKS: SecurityTracker Alert ID: 1025575 SecurityTracker Alert ID: 1025572

345

Reducing the negative effects of sales promotions in supply chains using genetic algorithms  

Science Conference Proceedings (OSTI)

This paper considers the detrimental effect of promotions on the supply chain (SC), one of the main causes of the bullwhip effect. A genetic algorithm (GA) is proposed to reduce these negative effects. In order to validate the GA, it is used to determine ... Keywords: Artificial intelligence, Efficiency, Forecasting, Supply chain

T. O'Donnell; P. Humphreys; R. McIvor; L. Maguire

2009-05-01T23:59:59.000Z

346

Finding a happy medium: explaining the negative effects of electronic communication on social life at work  

Science Conference Proceedings (OSTI)

The sometimes observed negative social effects of electronic communication technology are often attributed to the characteristics of the technology itself. Electronic mail, for instance, filters out personal and social cues and provides new capabilities ... Keywords: connectedness, depersonalization, electronic mail, etiquette, politics, social distance

M. L. Markus

1994-04-01T23:59:59.000Z

347

Four-wave mixing, quantum control and compensating losses in doped negative-index photonic metamaterials  

E-Print Network (OSTI)

The possibility of compensating absorption in negative-index metatamterials (NIMs) doped by resonant nonlinear-optical centers is shown. The role of quantum interference and extraordinary properties of four-wave parametric amplification of counter-propagating electromagnetic waves in NIMs are discussed.

Popov, Alexander K; George, Thomas F; Shalaev, Vladimir M

2007-01-01T23:59:59.000Z

348

Four-wave mixing, quantum control and compensating losses in doped negative-index photonic metamaterials  

E-Print Network (OSTI)

The possibility of compensating absorption in negative-index metatamterials (NIMs) doped by resonant nonlinear-optical centers is shown. The role of quantum interference and extraordinary properties of four-wave parametric amplification of counter-propagating electromagnetic waves in NIMs are discussed.

Alexander K. Popov; Sergey A. Myslivets; Thomas F. George; Vladimir M. Shalaev

2007-08-01T23:59:59.000Z

349

Orbit, optics and chromaticity correction for PS2 negative momentum compaction lattices  

SciTech Connect

The effect of magnet misalignments in the beam orbit and linear optics functions are reviewed and correction schemes are applied to the negative momentum compaction lattice of PS2. Chromaticity correction schemes are also proposed and tested with respect to off-momentum optics properties. The impact of the correction schemes in the dynamic aperture of the lattice is finally evaluated.

Papaphilippou,Y.; Barranco, J.; Bartmann, W.; Benedikt, M.; Carli, C.; de Maria, R.; Peggs, S.; Trbojevic, D.

2009-05-04T23:59:59.000Z

350

In silico identification of Gram-negative bacterial secreted proteins from primary sequence  

Science Conference Proceedings (OSTI)

In this study, we focus on different types of Gram-negative bacterial secreted proteins, and try to analyze the relationships and differences among them. Through an extensive literature search, 1612 secreted proteins have been collected as a standard ... Keywords: Multi-classifier, Pseudo-amino acid composition, Sequence similarity network, Support vector machine

Lezheng Yu, Jiesi Luo, Yanzhi Guo, Yizhou Li, Xuemei Pu, Menglong Li

2013-09-01T23:59:59.000Z

351

System analysis of a negative impedance converter receiver for ultra low frequencies  

Science Conference Proceedings (OSTI)

Monitoring electromagnetic waves in the Ultra Low Frequency (ULF) range between 1 mHz and 1 Hz is essential for an understanding of the processes in the earths magnetosphere. Also earthquake prone areas are under suspect to emit precursor ULF signals. ... Keywords: magnetosphere, negative impedance convert, system analysis, ultra low frequency

Ernst D. Schmitter

2008-07-01T23:59:59.000Z

352

Method of preparing a negative electrode including lithium alloy for use within a secondary electrochemical cell  

DOE Patents (OSTI)

A negative electrode that includes a lithium alloy as active material is prepared by briefly submerging a porous, electrically conductive substrate within a melt of the alloy. Prior to solidification, excess melt can be removed by vibrating or otherwise manipulating the filled substrate to expose interstitial surfaces. Electrodes of such as solid lithium-aluminum filled within a substrate of metal foam are provided.

Tomczuk, Zygmunt (Palos Hills, IL); Olszanski, Theodore W. (Roselle, IL); Battles, James E. (Oak Forest, IL)

1977-03-08T23:59:59.000Z

353

Sky View Factors from High-Resolution Scanned Fish-eye Lens Photographic Negatives  

Science Conference Proceedings (OSTI)

A computerized method for calculating the sky view factor from fish-eye lens photographic negatives is presented. The images are scanned and stored on CD ROM, each CD holding 100 images. The images can be retrieved at very high resolutions of up ...

Kristina Blennow

1995-12-01T23:59:59.000Z

354

Negative oxygen ion formation in reactive magnetron sputtering processes for transparent conductive oxides  

Science Conference Proceedings (OSTI)

Reactive d.c. magnetron sputtering in Ar/O{sub 2} gas mixtures has been investigated with energy-resolved mass spectrometry. Different metal targets (Mg, Ti, Zn, In, InSn, and Sn), which are of importance for transparent conductive oxide thin film deposition, have been used to study the formation of negative ions, mainly high-energetic O{sup -}, which are supposed to induce radiation damage in thin films. Besides their energy distribution, the ions have been particularly investigated with respect to their intensity in comparison of the different target materials. To realize the comparability, various calibration factors had to be introduced. After their application, major differences in the negative ion production have been observed for the target materials. The intensity, especially of O{sup -}, differs by about two orders of magnitude. It is shown that this difference results almost exclusively from ions that gain their energy in the target sheath. Those may gain additional energy from the sputtering process or reflection at the target. Low-energetic negative ions are, however, less affected by changes of the target material. The results concerning O{sup -} formation are discussed in term of the sputtering rate from the target and are compared to models for negative ion formation.

Welzel, Thomas; Ellmer, Klaus [Helmholtz-Zentrum Berlin fuer Materialien und Energie, Institut Solare Brennstoffe, Hahn-Meitner-Platz 1, D-14109 Berlin (Germany)

2012-11-15T23:59:59.000Z

355

Lithium aluminum/iron sulfide battery having lithium aluminum and silicon as negative electrode  

SciTech Connect

A method of making a negative electrode, the electrode made thereby and a secondary electrochemical cell using the electrode. Silicon powder is mixed with powdered electroactive material, such as the lithium-aluminum eutectic, to provide an improved electrode and cell.

Gilbert, Marian (Flossmoor, IL); Kaun, Thomas D. (New Lenox, IL)

1984-01-01T23:59:59.000Z

356

Pyridone Methylsulfone Hydroxamate LpxC Inhibitors for the Treatment of Serious Gram-Negative Infections  

Science Conference Proceedings (OSTI)

The synthesis and biological activity of a new series of LpxC inhibitors represented by pyridone methylsulfone hydroxamate 2a is presented. Members of this series have improved solubility and free fraction when compared to compounds in the previously described biphenyl methylsulfone hydroxamate series, and they maintain superior Gram-negative antibacterial activity to comparator agents.

Montgomery, Justin I.; Brown, Matthew F.; Reilly, Usa; Price, Loren M.; Abramite, Joseph A.; Arcari, Joel; Barham, Rose; Che, Ye; Chen, Jinshan Michael; Chung, Seung Won; Collantes, Elizabeth M.; Desbonnet, Charlene; Doroski, Matthew; Doty, Jonathan; Engtrakul, Juntyma J.; Harris, Thomas M.; Huband, Michael; Knafels, John D.; Leach, Karen L.; Liu, Shenping; Marfat, Anthony; McAllister, Laura; McElroy, Eric; Menard, Carol A.; Mitton-Fry, Mark; Mullins, Lisa; Noe, Mark C.; O’ Donnell, John; Oliver, Robert; Penzien, Joseph; Plummer, Mark; Shanmugasundaram, Veerabahu; Thoma, Christy; Tomaras, Andrew P.; Uccello, Daniel P.; Vaz, Alfin; Wishka, Donn G. (Pfizer)

2012-11-09T23:59:59.000Z

357

SRAM write-ability improvement with transient negative bit-line voltage  

Science Conference Proceedings (OSTI)

Increasing variations in device parameters significantly degrades the write-ability of SRAM cells in deep sub-100 nm CMOS technology. In this paper, a transient negative bit-line voltage technique is presented to improve write-ability of SRAM cell. Capacitive ... Keywords: SRAM, capacitive coupling, variation, write-ability

Saibal Mukhopadhyay; Rahul M. Rao; Jae-Joon Kim; Ching-Te Chuang

2011-01-01T23:59:59.000Z

358

Harnack Inequalities for NonNegative Solutions to Degenerate and Singular Parabolic Partial  

E-Print Network (OSTI)

Harnack Inequalities for Non­Negative Solutions to Degenerate and Singular Parabolic Partial, Local Behaviour of Solutions of Quasi­linear Parabolic Equations, Arch. Rat. Mech. Anal 25, (1967), 81 Parabolic Equations with Measurable Coefficients, Arch. Rational. Mech. Anal. 118, (1992), 257­271. [4] E

Gianazza, Ugo

359

Negative impact of noise on the principal component analysis of NMR data  

E-Print Network (OSTI)

Negative impact of noise on the principal component analysis of NMR data Steven Halouska, Robert (PCA) is routinely applied to the study of NMR based metabolomic data. PCA is used to simplify of metabolites to identify trends or character- istics within the NMR data that permits discrimination between

Powers, Robert

360

Activated Aging Dynamics and Negative Fluctuation-Dissipation Ratios Peter Mayer,1,2  

E-Print Network (OSTI)

Activated Aging Dynamics and Negative Fluctuation-Dissipation Ratios Peter Mayer,1,2 Se´bastien Le 2006) In glassy materials, aging proceeds at large times via thermal activation. We show that this can theoretical and numerical results for the activated aging regime of simple kinetically constrained models

Berthier, Ludovic

Note: This page contains sample records for the topic "negative daily imbalances" 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

Recognition of Negative Mesoscale Factors for Severe-Weather Potential: A Case Study  

Science Conference Proceedings (OSTI)

The case of 7–8 June 1998 in eastern New Mexico and western Texas is used to illustrate the challenge of recognizing possible negative effects created by mesoscale processes. In this case, a region of cloud-covered cool air (which was associated ...

Charles A. Doswell III; Donald V. Baker; Charlie A. Liles

2002-10-01T23:59:59.000Z

362

Mood, food, traits, and restraint: an experimental investigation of negative affect, borderline personality, and disordered eating  

E-Print Network (OSTI)

Eating disorders and borderline personality disorder involve several overlapping features, such as impulsivity, negative affectivity, and dissociation. However, few studies have specifically assessed how eating pathology and borderline personality may be related. The present study sought to evaluate this relationship by focusing on one particular area of overlap, negative affectivity. A pilot study assessed the psychometric properties of a dietary restraint measure among undergraduate women (N = 149). In the main study, undergraduate women (N = 307) completed a baseline mood assessment, then viewed a 39-minute sad film either with or without concurrent food presentation. Participants then completed a second mood assessment, and those who received food completed a third mood assessment following a 10-minute post-reflection delay. Results suggest that women reporting more borderline features exhibited greater negative affect across three different time points (baseline, post-movie/food, and post-reflection period), and were more reactive to the sad film. Food presentation appeared to have a small tempering effect on sadness, such that individuals who received food reported relatively less sadness after viewing the film when compared to those who did not receive food. However, actual quantity of food consumption was associated with improvements in mood only for women reporting higher levels of borderline features. Finally, highscorers on dietary restraint measures consumed greater quantities of food than their lowscoring counterparts. In sum, these data suggest that women with borderline personality features may be at elevated risk for developing problems with binge-eating, as consuming larger quantities of food appeared to have a tempering effect on their negative mood and specific feelings of sadness. Further, results are consistent with earlier findings in that reported efforts to restrain dietary intake were associated with greater food consumption in response to negative affect, and this relationship may need to be addressed in treating individuals with problematic eating behaviors.

Ambwani, Suman

2008-08-01T23:59:59.000Z

363

Evaluation of rule effectiveness and positive predictive value of clinical rules in a Dutch clinical decision support system in daily hospital pharmacy practice  

Science Conference Proceedings (OSTI)

Introduction: Our advanced clinical decision support (CDS) system, entitled 'adverse drug event alerting system' (ADEAS), is in daily use in our hospital pharmacy. It is used by hospital pharmacists to select patients at risk of possible adverse drug ... Keywords: Adverse drug events, Clinical decision support systems, Clinical pharmacy services, Clinical rules, Evaluation studies, Hospital pharmacy services, Medication safety, Positive predictive value, Rule effectiveness, University hospitals

Mirjam K. Rommers, Juliëtte Zwaveling, Henk-Jan Guchelaar, Irene M. Teepe-Twiss

2013-09-01T23:59:59.000Z

364

MIMO OFDM receivers for systems with IQ imbalances  

E-Print Network (OSTI)

USA (e-mail: tarighat@ee.ucla.edu; bagheri@ee.ucla.edu; sayed@ee.ucla.edu). Digital Object Identi?er 10.1109/TSP.2005.853148 large demand

Tarighat, Alireza; Sayed, A H

2005-01-01T23:59:59.000Z

365

Quantitative Study of Stoichiometric Proton Imbalance in Phototrophic Algal Growth.  

E-Print Network (OSTI)

??The high production of algae based biofuel requires high density of algae culture. One of the important issues associated with high density algae cultivation is… (more)

Wang, Jun

2013-01-01T23:59:59.000Z

366

NIST Physicists Chip Away at Mystery of Antimatter Imbalance  

Science Conference Proceedings (OSTI)

... the antimatter vanished in this fashion, leaving behind a tiny bit of matter awash in cosmic energy. What we see around us today, from stars to rocks ...

2011-11-09T23:59:59.000Z

367

Network for minimizing current imbalances in a faradaic battery  

SciTech Connect

A circuit for connecting a faradaic battery with circuitry for monitoring the condition of the battery includes a plurality of voltage divider networks providing battery voltage monitoring nodes and includes compensating resistors connected with the networks to maintain uniform discharge currents through the cells of the battery. The circuit also provides a reduced common mode voltage requirement for the monitoring circuitry by referencing the divider networks to one-half the battery voltage.

Wozniak, Walter (Dearborn, MI); Haskins, Harold J. (Ann Arbor, MI)

1994-01-01T23:59:59.000Z

368

Spontaneous Imbalance and Hybrid Vortex–Gravity Structures  

Science Conference Proceedings (OSTI)

After reviewing the background, this article discusses the recently discovered examples of hybrid propagating structures consisting of vortex dipoles and comoving gravity waves undergoing wave capture. It is shown how these examples fall outside ...

Michael E. McIntyre

2009-05-01T23:59:59.000Z

369

The class imbalance problem in TLC image classification  

Science Conference Proceedings (OSTI)

The paper presents the methodology developed to solve the class imbalanced problem that occurs in the classification of Thin-Layer Chromatography (TLC) images. The proposed methodology is based on re-sampling, and consists in the undersampling of the ...

António V. Sousa; Ana Maria Mendonça; Aurélio Campilho

2006-09-01T23:59:59.000Z

370

Automatically countering imbalance and its empirical relationship to cost  

Science Conference Proceedings (OSTI)

Learning from imbalanced data sets presents a convoluted problem both from the modeling and cost standpoints. In particular, when a class is of great interest but occurs relatively rarely such as in cases of fraud, instances of disease, and regions of ... Keywords: Classification, Cost-sensitive learning, Unbalanced data

Nitesh V. Chawla; David A. Cieslak; Lawrence O. Hall; Ajay Joshi

2008-10-01T23:59:59.000Z

371

The First Observation of Intra Beam Stripping of Negative Hydrogen in a Superconducting Linear Accelerator  

Science Conference Proceedings (OSTI)

We report on an experiment in which a negative hydrogen ions beam in the Spallation Neutron Source (SNS) linear accelerator was replaced with a beam of protons with similar size and dynamics. Beam loss in the superconducting part of the SNS accelerator was at least an order of magnitude lower for the proton beam. Also beam loss has a stronger dependence on intensity with H- than with proton beams. These measurements verify a recent theoretical explanation of unexpected beam losses in the SNS superconducting linear accelerator based on an intra beam stripping mechanism for negative hydrogen ions. An identification of the new physics mechanism for beam loss is important for the design of new high current linear ion accelerators and the performance improvement of existing machines

Aleksandrov, Alexander V [ORNL; Plum, Michael A [ORNL; Shishlo, Andrei P [ORNL; Galambos, John D [ORNL

2012-01-01T23:59:59.000Z

372

Scattering in the pion-nucleon negative parity channel in lattice QCD  

E-Print Network (OSTI)

We study the coupled pion-nucleon system (negative parity, isospin 1/2) based on a lattice QCD simulation for nf=2 mass degenerate light quarks. Both, standard 3-quarks baryon operators as well as meson-baryon (4+1)-quark operators are included. This is an exploratory study for just one lattice size and lattice spacing and at a pion mass of 266 MeV. Using the distillation method and variational analysis we determine energy levels of the lowest eigenstates. Comparison with the results of simple 3-quark correlation studies exhibits drastic differences and a new level appears. A clearer picture of the negative parity nucleon spectrum emerges. For the parameters of the simulation we may assume elastic s-wave scattering and can derive values of the phase shift.

C. B. Lang; V. Verduci

2012-12-20T23:59:59.000Z

373

Scattering in the pion-nucleon negative parity channel in lattice QCD  

E-Print Network (OSTI)

We study the coupled pion-nucleon system (negative parity, isospin 1/2) based on a lattice QCD simulation for nf=2 mass degenerate light quarks. Both, standard 3-quarks baryon operators as well as meson-baryon (4+1)-quark operators are included. This is an exploratory study for just one lattice size and lattice spacing and at a pion mass of 266 MeV. Using the distillation method and variational analysis we determine energy levels of the lowest eigenstates. Comparison with the results of simple 3-quark correlation studies exhibits drastic differences and a new level appears. A clearer picture of the negative parity nucleon spectrum emerges. For the parameters of the simulation we may assume elastic s-wave scattering and can derive values of the phase shift.

Lang, C B

2013-01-01T23:59:59.000Z

374

Negative heat capacities and first order phase transitions in nuclei and other mesoscopic systems  

E-Print Network (OSTI)

The origin of predicted and observed anomalies in caloric curves of nuclei and other mesoscopic systems is investigated. It is shown that a straightforward thermodynamical treatment of an evaporating liquid drop leads to a backbending in the caloric curve and to negative specific heats in the two phase coexistence region. The cause is found not in the generation of additional surface, but in the progressive reduction of the drop's radius, and surface, with evaporation.

L. G. Moretto; J. B. Elliott; L. Phair; G. J. Wozniak

2000-12-11T23:59:59.000Z

375

Method of preparing a negative electrode including lithium alloy for use within a secondary electrochemical cell  

DOE Patents (OSTI)

A negative electrode that includes a lithium alloy as active material is prepared by briefly submerging a porous, electrically conductive substrate within a melt of the alloy. Prior to solidification, excess melt can be removed by vibrating or otherwise manipulating the filled substrate to expose interstitial surfaces. Electrodes of such a solid lithium--aluminum filled within a substrate of metal foam are provided. 1 figure, 1 table.

Tomczuk, Z.; Olszanski, W.; Battles, J.E.

1975-12-09T23:59:59.000Z

376

Hydridable material for the negative electrode in a nickel-metal hydride storage battery  

SciTech Connect

A monophase hydridable material for the negative electrode of a nickel-metal hydride storage battery with a "Lave's phase" structure of hexagonal C14 type (MgZn.sub.2) has the general formula: Zr.sub.1-x Ti.sub.x Ni.sub.a Mn.sub.b Al.sub.c Co.sub.d V.sub.e where ##EQU1##

Knosp, Bernard (Neuilly-sur-Seine, FR); Bouet, Jacques (Paris, FR); Jordy, Christian (Dourdan, FR); Mimoun, Michel (Neuilly-sur-Marne, FR); Gicquel, Daniel (Lanorville, FR)

1997-01-01T23:59:59.000Z

377

Low energy milling method, low crystallinity alloy, and negative electrode composition  

DOE Patents (OSTI)

A method of making nanostructured alloy particles includes milling a millbase in a pebble mill containing milling media. The millbase comprises: (i) silicon, and (ii) at least one of carbon or a transition metal, and wherein the nanostructured alloy particles are substantially free of crystalline domains greater than 50 nanometers in size. A method of making a negative electrode composition for a lithium ion battery including the nanostructured alloy particles is also disclosed.

Le, Dihn B; Obrovac, Mark N; Kube, Robert Y; Landucci, James R

2012-10-16T23:59:59.000Z

378

Negative ion detachment cross sections. [Physics Dept. , College of William and Mary, Williamsburg, Virginia  

DOE Green Energy (OSTI)

The authors have measured absolute cross sections for electron detachment and charge exchange for collision of O and S with atomic hydrogen, have investigated the sputtering and photodesorption of negative ions from gas covered surfaces, and have begun an investigation of photon-induced field emission of electrons from exotic structures. Brief descriptions of these activities as well as future plans for these projects are given below.

Champion, R.L.; Doverspike, L.D.

1992-10-01T23:59:59.000Z

379

Backward wave radiation from negative permittivity waveguides and its use for THz subwavelength imaging  

SciTech Connect

In this paper we demonstrate the possibility of backward radiation from a negative permittivity planar (slab) waveguide. Furthermore, we show that backward radiation can be used to achieve sub-wavelength imaging of a point source placed close to such a slab or to a periodic layered system of slabs. Finally, we demonstrate backward-radiation-based imaging in the case of realistic materials operating in the THz regime, such as polaritonic alkali-halide systems.

Basharin, Alexey A.; Kafesaki, Maria; Economou, Eleftherios N.; Soukoulis, Costas M.

2012-05-23T23:59:59.000Z

380

T-677: F5 BIG-IP BIND Negative Caching RRSIG RRsets Denial of Service  

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

7: F5 BIG-IP BIND Negative Caching RRSIG RRsets Denial of 7: F5 BIG-IP BIND Negative Caching RRSIG RRsets Denial of Service Vulnerability T-677: F5 BIG-IP BIND Negative Caching RRSIG RRsets Denial of Service Vulnerability July 27, 2011 - 3:58pm Addthis PROBLEM: F5 has acknowledged a vulnerability in BIG-IP, which can be exploited by malicious people to cause a DoS (Denial of Service). PLATFORM: The vulnerability is reported in the following products and versions: BIG-IP LTM versions 9.0.0 through 9.4.8, 10.0.0 through 10.1.0, and 10.2.0 through 10.2.2 BIG-IP GTM versions 9.0.0 through 9.4.8, 10.0.0 through 10.1.0, and 10.2.0 through 10.2.2 BIG-IP ASM versions 9.0.0 through 9.4.8, 10.0.0 through 10.1.0, and 10.2.0 through 10.2.2 BIG-IP Link Controller versions 9.0.0 through 9.4.8, 10.0.0 through 10.1.0, and 10.2.0 through 10.2.2

Note: This page contains sample records for the topic "negative daily imbalances" 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

The development of the radio frequency driven negative ion source for neutral beam injectors (invited)  

Science Conference Proceedings (OSTI)

Large and powerful negative hydrogen ion sources are required for the neutral beam injection (NBI) systems of future fusion devices. Simplicity and maintenance-free operation favors RF sources, which are developed intensively at the Max-Planck-Institut fuer Plasmaphysik (IPP) since many years. The negative hydrogen ions are generated by caesium-enhanced surface conversion of atoms and positive ions on the plasma grid surface. With a small scale prototype the required high ion current density and the low fraction of co-extracted electrons at low pressure as well as stable pulses up to 1 h could be demonstrated. The modular design allows extension to large source dimensions. This has led to the decision to choose RF sources for the NBI of the international fusion reactor, ITER. As an intermediate step towards the full size ITER source at IPP, the development will be continued with a half-size source on the new ELISE testbed. This will enable to gain experience for the first time with negative hydrogen ion beams from RF sources of these dimensions.

Kraus, W.; Fantz, U.; Franzen, P.; Froeschle, M.; Heinemann, B.; Riedl, R.; Wuenderlich, D. [Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, 85748 Garching (Germany)

2012-02-15T23:59:59.000Z

382

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

383

Positive/negative ion velocity mapping apparatus for electron-molecule reactions  

Science Conference Proceedings (OSTI)

In molecular dissociative ionization by electron collisions and dissociative electron attachment to molecule, the respective positively and negatively charged fragments are the important products. A compact ion velocity mapping apparatus is developed for the angular distribution measurements of the positive or negative fragments produced in the electron-molecule reactions. This apparatus consists of a pulsed electron gun, a set of ion velocity mapping optic lenses, a two-dimensional position detector including two pieces of micro-channel plates, and a phosphor screen, and a charge-coupled-device camera for data acquisition. The positive and negative ion detections can be simply realized by changing the voltage polarity of ion optics and detector. Velocity sliced images can be directly recorded using a narrow voltage pulse applied on the rear micro-channel plate. The efficient performance of this system is evaluated by measuring the angular distribution of O{sup -} from the electron attachments to NO at 7.3 and 8.3 eV and O{sup +} from the electron collision with CO at 40.0 eV.

Wu Bin; Xia Lei; Li Hongkai; Zeng Xianjin; Tian Shanxi [Hefei National Laboratory for Physical Sciences at the Microscale and Department of Chemical Physics, University of Science and Technology of China, Hefei, Anhui 230026 (China)

2012-01-15T23:59:59.000Z

384

Assessment of Planning Target Volume Margins for Intensity-Modulated Radiotherapy of the Prostate Gland: Role of Daily Inter- and Intrafraction Motion  

Science Conference Proceedings (OSTI)

Purpose: To determine planning target volume margins for prostate intensity-modulated radiotherapy based on inter- and intrafraction motion using four daily localization techniques: three-point skin mark alignment, volumetric imaging with bony landmark registration, volumetric imaging with implanted fiducial marker registration, and implanted electromagnetic transponders (beacons) detection. Methods and Materials: Fourteen patients who underwent definitive intensity-modulated radiotherapy for prostate cancer formed the basis of this study. Each patient was implanted with three electromagnetic transponders and underwent a course of 39 treatment fractions. Daily localization was based on three-point skin mark alignment followed by transponder detection and patient repositioning. Transponder positioning was verified by volumetric imaging with cone-beam computed tomography of the pelvis. Relative motion between the prostate gland and bony anatomy was quantified by offline analyses of daily cone-beam computed tomography. Intratreatment organ motion was monitored continuously by the Calypso (registered) System for quantification of intrafraction setup error. Results: As expected, setup error (that is, inter- plus intrafraction motion, unless otherwise stated) was largest with skin mark alignment, requiring margins of 7.5 mm, 11.4 mm, and 16.3 mm, in the lateral (LR), longitudinal (SI), and vertical (AP) directions, respectively. Margin requirements accounting for intrafraction motion were smallest for transponder detection localization techniques, requiring margins of 1.4 mm (LR), 2.6 mm (SI), and 2.3 mm (AP). Bony anatomy alignment required 2.1 mm (LR), 9.4 mm (SI), and 10.5 mm (AP), whereas image-guided marker alignment required 2.8 mm (LR), 3.7 mm (SI), and 3.2 mm (AP). No marker migration was observed in the cohort. Conclusion: Clinically feasible, rapid, and reliable tools such as the electromagnetic transponder detection system for pretreatment target localization and, subsequently, intratreatment target location monitoring allow clinicians to reduce irradiated volumes and facilitate safe dose escalation, where appropriate.

Tanyi, James A., E-mail: tanyij@ohsu.ed [Department of Radiation Medicine, Oregon Health and Science University, Portland, OR (United States); Department of Nuclear Engineering and Radiation Health Physics, Oregon State University, Corvallis, OR (United States); He, Tongming [Department of Radiation Medicine, Oregon Health and Science University, Portland, OR (United States); Department of Nuclear Engineering and Radiation Health Physics, Oregon State University, Corvallis, OR (United States); Summers, Paige A. [Department of Medical Physics, University of Texas Graduate School of Biomedical Sciences, Houston, TX (United States); Mburu, Ruth G. [Department of Chemistry, Portland State University, Portland, OR (United States); Kato, Catherine M.; Rhodes, Stephen M.; Hung, Arthur Y.; Fuss, Martin [Department of Radiation Medicine, Oregon Health and Science University, Portland, OR (United States)

2010-12-01T23:59:59.000Z

385

Comparison of prediction and measurement of negative sequence currents of generators connected to 345-kV asymmetrical transmission lines  

Science Conference Proceedings (OSTI)

This paper is used to evaluate the negative sequence currents (NSC) of two generators in a generation plant, which are connected to the power pool through four over-head asymmetrical 345-kV transmission lines. The simulation results by using PSS/E and ... Keywords: EMTP, PSS/E, asymmetrical transmission lines, negative sequence current, unbalance

Chi-Jui Wu; Ping-Heng Ho

2011-03-01T23:59:59.000Z

386

Recovery of negative bias temperature instability induced degradation of p-MOSFETs with SiON gate dielectric  

Science Conference Proceedings (OSTI)

This paper investigates the recovery property of p-MOSFETs with an ultra-thin SiON gate dielectric which are degraded by negative bias temperature instability (NBTI). The experimental results indicate that the recovery of the NBTI degradation occurs ... Keywords: Gate dielectric, MOSFET, Negative bias temperature instability (NBTI), Reliability, Silicon oxynitride

Y. D. Kim; S. U. Han; H. S. Kang; B. K. Kang

2008-09-01T23:59:59.000Z

387

Negative parity baryon decays in the 1/N{sub c} expansion  

Science Conference Proceedings (OSTI)

The partial decay widths of lowest lying negative parity baryons belonging to the 70-plet of SU(6) are analyzed in the framework of the 1/N{sub c} expansion. The channels considered are those with single pseudoscalar meson emission. The analysis is carried out to sub-leading order in 1/N{sub c} and to first order in SU(3) symmetry breaking. Conclusions about the magnitude of SU(3) breaking effects along with predictions for some unknown or poorly determined partial decay widths of known resonances are obtained.

Jayalath, C. [Department of Physics, Hampton University, Hampton, Virginia 23668 (United States); Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States); Department of Physics, Peradeniya University, Peradeniya 20400 (Sri Lanka); Goity, J. L. [Department of Physics, Hampton University, Hampton, Virginia 23668 (United States); Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606 (United States); Gonzalez de Urreta, E. [Department of Theoretical Physics, Comision Nacional de Energia Atomica, 1429 Buenos Aires (Argentina); CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina); Scoccola, N. N. [Department of Theoretical Physics, Comision Nacional de Energia Atomica, 1429 Buenos Aires (Argentina); CONICET, Rivadavia 1917, 1033 Buenos Aires (Argentina); Universidad Favaloro, Solis 453, 1078 Buenos Aires (Argentina)

2011-10-01T23:59:59.000Z

388

Negative capacitance in organic semiconductor devices: bipolar injection and charge recombination mechanism  

E-Print Network (OSTI)

We report negative capacitance at low frequencies in organic semiconductor based diodes and show that it appears only under bipolar injection conditions. We account quantitatively for this phenomenon by the recombination current due to electron-hole annihilation. Simple addition of the recombination current to the well established model of space charge limited current in the presence of traps, yields excellent fits to the experimentally measured admittance data. The dependence of the extracted characteristic recombination time on the bias voltage is indicative of a recombination process which is mediated by localized traps.

Ehrenfreund, E; Dennler, G; Neugebauer, H; Sariciftci, N S

2007-01-01T23:59:59.000Z

389

Negative Off-Diagonal Conductivities in a Weakly Coupled Quark Gluon Plasma  

E-Print Network (OSTI)

We calculate the conductivity matrix of a weakly coupled quark-gluon plasma at the leading-log order. By setting all quark chemical potentials to be identical, the diagonal conductivities become degenerate and positive, while the off-diagonal ones become degenerate but negative (or zero when the chemical potential vanishes). This means a potential gradient of a certain fermion flavor can drive backward currents of other flavors. A simple explanation is provided for this seemingly counter intuitive phenomenon. It is speculated that this phenomenon is generic and most easily measured in cold atom experiments.

Jiunn-Wei Chen; Yen-Fu Liu; Shi Pu; Yu-Kun Song; Qun Wang

2013-08-13T23:59:59.000Z

390

Negative Off-Diagonal Conductivities in a Weakly Coupled Quark Gluon Plasma  

E-Print Network (OSTI)

We calculate the conductivity matrix of a weakly coupled quark-gluon plasma at the leading-log order. By setting all quark chemical potentials to be identical, the diagonal conductivities become degenerate and positive, while the off-diagonal ones become degenerate but negative (or zero when the chemical potential vanishes). This means a potential gradient of a certain fermion flavor can drive backward currents of other flavors. A simple explanation is provided for this seemingly counter intuitive phenomenon. It is speculated that this phenomenon is generic and most easily measured in cold atom experiments.

Chen, Jiunn-Wei; Pu, Shi; Song, Yu-Kun; Wang, Qun

2013-01-01T23:59:59.000Z

391

Enhanced negative ion formation via electron attachment to electronically-excited states  

DOE Green Energy (OSTI)

Recent basic studies on electron attachment to laser-excited molecules show that electron attachment to electronically-excited states can have orders of magnitude larger cross sections compared to the respective ground electronic states. Even though systematic studies have not been conducted, there are indications that electronically-excited states may play a significant role in negative ion formation in gas discharges. The high-lying Rydberg states could be of particular significance since, (i) their production efficiencies are high, and (ii) they have comparatively long lifetimes. Such states could be populated in discharge sources via direct electron impact or via excitation transfer from metastable states of inert gases.

Pinnaduwage, L.A. [Oak Ridge National Lab., TN (United States). Health Sciences Research Div.]|[Univ. of Tennessee, Knoxville, TN (United States). Dept. of Physics

1995-12-31T23:59:59.000Z

392

Negative parity baryon decays in the 1/N{sub c} expansion  

Science Conference Proceedings (OSTI)

The partial decay widths of lowest lying negative parity baryons belonging to the 70-plet of SU(6)are analyzed in the framework of the 1/N{sub c} expansion. The channels considered are those with single pseudoscalar meson emission. The analysis is carried out to sub-leading order in 1/Nc and to first order in SU(3) symmetry breaking. Conclusions about the magnitude of SU(3) breaking effects along with predictions for some unknown or poorly determined partial decay widths of known resonances are given.

Chandana Jayalath,Jose Goity,Emiliano Gonzalez de Urreta,Norberto Scoccola

2011-10-01T23:59:59.000Z

393

Ion optical design of a collinear laser-negative ion beam apparatus  

Science Conference Proceedings (OSTI)

An apparatus for photodetachment studies on atomic and molecular negative ions of medium up to heavy mass (M {approx_equal} 500) has been designed and constructed. Laser and ion beams are merged in the apparatus in a collinear geometry and atoms, neutral molecules and negative ions are detected in the forward direction. The ion optical design and the components used to optimize the mass resolution and the transmission through the extended field-free interaction region are described. A 90 deg. sector field magnet with 50 cm bending radius in combination with two slits is used for mass dispersion providing a resolution of M/{Delta}M congruent with 800 for molecular ions and M/{Delta}M congruent with 400 for atomic ions. The difference in mass resolution for atomic and molecular ions is attributed to different energy distributions of the sputtered ions. With 1 mm slits, transmission from the source through the interaction region to the final ion detector was determined to be about 0.14%.

Diehl, C.; Wendt, K. [Institut fuer Physik, Johannes Gutenberg-Universitaet, Mainz, D-55099 Mainz (Germany); Lindahl, A. O.; Andersson, P.; Hanstorp, D. [Department of Physics, University of Gothenburg, SE-412 96 Goeteborg (Sweden)

2011-05-15T23:59:59.000Z

394

Negative differential conductance in InAs wire based double quantum dot induced by a charged AFM tip  

Science Conference Proceedings (OSTI)

We investigate the conductance of an InAs nanowire in the nonlinear regime in the case of low electron density where the wire is split into quantum dots connected in series. The negative differential conductance in the wire is initiated by means of a charged atomic force microscope tip adjusting the transparency of the tunneling barrier between two adjoining quantum dots. We confirm that the negative differential conductance arises due to the resonant tunneling between these two adjoining quantum dots. The influence of the transparency of the blocking barriers and the relative position of energy states in the adjoining dots on a decrease of the negative differential conductance is investigated in detail.

Zhukov, A. A., E-mail: azhukov@issp.ac.ru [Russian Academy of Science, Institute of Solid State Physics (Russian Federation); Volk, Ch.; Winden, A.; Hardtdegen, H.; Schaepers, Th. [Peter Gruenberg Institut (PGI-9) (Germany)

2012-12-15T23:59:59.000Z

395

Existence domains of large amplitude dust-acoustic solitons in non-thermal plasmas with positive and negative dust  

Science Conference Proceedings (OSTI)

Using the traditional Sagdeev pseudopotential approach, the existence of large amplitude solitons is investigated for a plasma composed of cold negative dust, adiabatic positive dust, non-thermal ions and Boltzmann electrons. The lower and upper soliton Mach number limitations are determined as a function of various parameters and physical reasons are provided as to why these Mach number limits occur. Some regions in parameter space have been identified where only negative or positive solitons occur, whereas, other regions support the coexistence of both positive and negative potential solitons.

Maharaj, S. K. [South African National Space Agency Space Science, P O Box 32, Hermanus 7200 (South Africa); Bharuthram, R. [University of the Western Cape, Modderdam Road, Bellville 7530 (South Africa); Singh, S. V.; Lakhina, G. S. [Indian Institute of Geomagnetism, New Panvel, Navi Mumbai 410218 (India); Pillay, S. R. [University of KwaZulu-Natal, Private Bag X54001, Durban 4000 (South Africa)

2011-11-29T23:59:59.000Z

396

If vacuum energy can be negative, why is mass always positive?: Uses of the subdominant trace energy condition  

E-Print Network (OSTI)

Diverse calculations have shown that a relativistic field confined to a cavity by well defined boundary conditions can have a negative Casimir or vacuum energy. Why then can one not make a finite system with negative mass by confining the field in a some way? We recall, and justify in detail, the not so familiar subdominant trace energy condition for ordinary (baryon-electron nonrelativistic) matter. With its help we show, in two ways, that the mass-energy of the cavity structure necessary to enforce the boundary conditions must exceed in magnitude the negative vacuum energy, so that all systems of the type envisaged necessarily have positive mass-energy.

Bekenstein, Jacob D

2013-01-01T23:59:59.000Z

397

Polarizabilities and Effective Parameters for Collections of Spherical Nano-Particles Formed by Pairs of Concentric Double-Negative (DNG), Single-Negative (SNG) and/or Double-Positive (DPS) Metamaterial Layers  

E-Print Network (OSTI)

Unusual scattering effects from tiny spherical particles may be obtained when concentric shells are designed by pairing together 'complementary' double-negative (DNG), single-negative (SNG), and/or standard double-positive (DPS) materials. By embedding these highly polarizable scatterers in a host medium one can achieve a bulk medium with interesting effective parameters. Some physical insights and justifications for the anomalous polarizability of these concentric spherical nano-particles and the effective parameters of the bulk composite medium are discussed.

Alu, A; Alu, Andrea; Engheta, Nader

2004-01-01T23:59:59.000Z

398

Polarizabilities and Effective Parameters for Collections of Spherical Nano-Particles Formed by Pairs of Concentric Double-Negative (DNG), Single-Negative (SNG) and/or Double-Positive (DPS) Metamaterial Layers  

E-Print Network (OSTI)

Unusual scattering effects from tiny spherical particles may be obtained when concentric shells are designed by pairing together 'complementary' double-negative (DNG), single-negative (SNG), and/or standard double-positive (DPS) materials. By embedding these highly polarizable scatterers in a host medium one can achieve a bulk medium with interesting effective parameters. Some physical insights and justifications for the anomalous polarizability of these concentric spherical nano-particles and the effective parameters of the bulk composite medium are discussed.

Andrea Alu; Nader Engheta

2004-10-01T23:59:59.000Z

399

Physical effects in rock under negative effective pressures: sound speeds and hydraulic diffusivity  

DOE Green Energy (OSTI)

A method for creating negative effective pressure in the laboratory has been developed and longitudinal sound speed and gas diffusivity under these conditions have been measured. The pressure field is created inside an annulus of fluid injection holes in a cylindrical sample; fluid flows radially outward down the pore pressure gradient to the sample's exterior. Pore pressure is monitored through capillary probes and the pressure field is uniform inside the injection ring. With pore fluid pressures to 1.2 MPa, decreases in both acoustic velocity and amplitude in an unconfined sample of fine-grained granite are observed. The velocity decrease is about 1.5% per MPa while amplitude decreases by approximately 10% per MPa. By measuring pressure relaxation after stepwise pore pressure increases, increases in gas diffusivity of approximately a factor of three between 0 and -1 MPa effective pressure are determined.

Shankland, T.J.; Halleck, P.M.

1981-01-01T23:59:59.000Z

400

Current-Controlled Negative Differential Resistance due to Joule Heating in TiO2  

E-Print Network (OSTI)

We show that Joule heating causes current-controlled negative differential resistance (CC-NDR) in TiO2 by constructing an analytical model of the voltage-current V(I) characteristic based on polaronic transport for Ohm's Law and Newton's Law of Cooling, and fitting this model to experimental data. This threshold switching is the 'soft breakdown' observed during electroforming of TiO2 and other transition-metal-oxide based memristors, as well as a precursor to 'ON' or 'SET' switching of unipolar memristors from their high to their low resistance states. The shape of the V(I) curve is a sensitive indicator of the nature of the polaronic conduction.

A. S. Alexandrov; A. M. Bratkovsky; B. Bridle; S. E. Savel'ev; D. B. Strukov; R. Stanley Williams

2011-08-15T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Inconsistencies of Neutrino and Quark Conjectures and their Negative Environmental Implications  

E-Print Network (OSTI)

By using a language as accessible to a broad audience as possible, in this note we present evidence suggesting scientific caution prior to final claims that neutrinos and quarks are actual physical particles existing in our spacetime. We review historical and recent evidence dismissing the existence of neutrinos and quarks as physical particles, and outline recent theories representing experimental data without their existence. We also identify the negative implications for environmental issues of the neutrino and quark conjectures since they imply the suppression of due scientific process on new clean energies predicted by new structure models of hadrons with massive physical constituents produced free in spontaneous or stimulated decays. The note ends with the need of continuing theoretical and experimental research on neutrino and quark conjectures, but complemented, for evident scientific democracy, accountability and societal needs, with theoretical and experimental studies on alternative theories without the neutrino and quark conjectures and their prediction of new clean energies.

Ruggero Maria Santilli

2006-03-30T23:59:59.000Z

402

Using phasors to analyze power system negative phase sequence voltages caused by unbalanced loads  

Science Conference Proceedings (OSTI)

An analytical method is demonstrated which allows the level of negative phase sequence (NPS) voltage at a busbar to be expressed as a sum of phasors representing independent sources. The method is extended to enable the balancing capability of Static Var Compensators (SVCs) with individual phase voltage control to be assessed. The capability of such SVCs and the allowable levels of NPS voltage on the system, including any short term limits, can be combined in a capability chart showing the unbalanced loads which can be supplied from a substation. The approach facilitates the treatment of fixed unbalances due to filters or intentional offsets designed to maximize the SVC balancing range for specific loads. Field test results are presented which validate the analytical methods used.

Ledwich, G. (Univ. of Queensland, St. Lucia (Australia)); George, T.A. (Queensland Electricity Commission, Brisbane (Australia))

1994-08-01T23:59:59.000Z

403

Influence of negative-U centers on the temperature dependence of the carrier concentration in the normal HTSC phase  

SciTech Connect

The temperature dependence of the hole concentration in high-temperature superconductors is considered in terms of the model of negative-U centers. It is shown that this dependence can be nonmonotonic due to the interaction of electron subsystems from the valence band with negative-U centers and the conditions necessary for this have been established. The results obtained are compared with experimental data on the Hall coefficient in cuprates.

Tsendin, K. D., E-mail: tsendin@mail.ioffe.ru; Barygin, I. A.; Kapustin, A. I. [Russian Academy of Sciences, Ioffe Physicotechnical Institute (Russian Federation); Popov, B. P. [St. Petersburg State Polytechnical University (Russian Federation)

2007-10-15T23:59:59.000Z

404

Standard CMOS Implementation of a Multiple-Valued Logic Signed-Digit Adder Based on Negative Differential-Resistance Devices  

Science Conference Proceedings (OSTI)

This paper presents MOS-NDR, a new prototyping technique for multiple-valued logic circuits combining MOS transistors and multipeak negative differential-resistance (NDR) devices such as resonant-tunneling diodes (RTDs). MOS-NDR emulates the folded current-voltage ... Keywords: signed-digit adder, redundant number systems, negative differential-resistance devices, NDR devices, resonant-tunneling diodes, RTDs, multiple-valued logic

Alejandro F. Gonzalez; Mayukh Bhattacharya; Shriram Kulkarni; Pinaki Mazumder

2000-05-01T23:59:59.000Z

405

Linear And Nonlinear Arabesques: A Study Of Closed Chains Of Negative 2-Element Circuits  

E-Print Network (OSTI)

In this paper we consider a family of dynamical systems that we call "arabesques", defined as closed chains of 2-element negative circuits. An $n$-dimensional arabesque system has $n$ 2-element circuits, but in addition, it displays by construction, two $n$-element circuits which are both positive vs one positive and one negative, depending on the parity (even or odd) of the dimension $n$. In view of the absence of diagonal terms in their Jacobian matrices, all these dynamical systems are conservative and consequently, they can not possess any attractor. First, we analyze a linear variant of them which we call "arabesque 0" or for short "A0". For increasing dimensions, the trajectories are increasingly complex open tori. Next, we inserted a single cubic nonlinearity that does not affect the signs of its circuits (that we call "arabesque 1" or for short "A1"). These systems have three steady states, whatever the dimension is, in agreement with the order of the nonlinearity. All three are unstable, as there can not be any attractor in their state-space. The 3D variant (that we call for short "A1\\_3D") has been analyzed in some detail and found to display a complex mixed set of quasi-periodic and chaotic trajectories. Inserting $n$ cubic nonlinearities (one per equation) in the same way as above, we generate systems "A2\\_$n$D". A2\\_3D behaves essentially as A1\\_3D, in agreement with the fact that the signs of the circuits remain identical. A2\\_4D, as well as other arabesque systems with even dimension, has two positive $n$-circuits and nine steady states. Finally, we investigate and compare the complex dynamics of this family of systems in terms of their symmetries.

Chris Antonopoulos; Vasileios Basios; Jacques Demongeot; Pasquale Nardone; Rene Thomas

2013-02-05T23:59:59.000Z

406

Observations and Modeling of Long Negative Laboratory Discharges: Identifying the Physics Important to an Electrical Spark in Air  

SciTech Connect

There are relatively few reports in the literature focusing on negative laboratory leaders. Most of the reports focus exclusively on the simpler positive laboratory leader that is more commonly encountered in high voltage engineering [Gorin et al., 1976; Les Renardieres Group, 1977; Gallimberti, 1979; Domens et al., 1994; Bazelyan and Raizer 1998]. The physics of the long, negative leader and its positive counterpart are similar; the two differ primarily in their extension mechanisms [Bazelyan and Raizer, 1998]. Long negative sparks extend primarily by an intermittent process termed a 'step' that requires the development of secondary leader channels separated in space from the primary leader channel. Long positive sparks typically extend continuously, although, under proper conditions, their extension can be temporarily halted and begun again, and this is sometimes viewed as a stepping process. However, it is emphasized that the nature of positive leader stepping is not like that of negative leader stepping. There are several key observational studies of the propagation of long, negative-polarity laboratory sparks in air that have aided in the understanding of the stepping mechanisms exhibited by such sparks [e.g., Gorin et al., 1976; Les Renardieres Group, 1981; Ortega et al., 1994; Reess et al., 1995; Bazelyan and Raizer, 1998; Gallimberti et al., 2002]. These reports are reviewed below in Section 2, with emphasis placed on the stepping mechanism (the space stem, pilot, and space leader). Then, in Section 3, reports pertaining to modeling of long negative leaders are summarized.

Biagi, C J; Uman, M A

2011-12-13T23:59:59.000Z

407

1000 -1300 CALORIES DAILY 60 grams protein daily  

E-Print Network (OSTI)

fat cheese stick and peeled apples slices DINNER 2 - 3 ounces chicken with ½ cup broccoli, ¼ cup meal size o Sip fluids slowly o Avoid high fat and high sugar foods o Avoid drinking fluids Meal Plan BREAKFAST ½ - 1 cup cereal, ½ banana and 4- 8 oz low fat milk SNACK: 1 light low fat yogurt

Goldman, Steven A.

408

Direct experimental evidence for a negative heat capacity in the liquid-to-gas like phase transitionin hydrogen cluster ions backbending of the caloric curve  

E-Print Network (OSTI)

Direct experimental evidence for a negative heat capacity in the liquid-to-gas like phase transitionin hydrogen cluster ions

Gobet, F; Farizon, M; Gaillard, M J; Buchet, J P; Carré, M; Schreier, P; Märk, T D

2002-01-01T23:59:59.000Z

409

Negative elongation factor NELF controls transcription of immediate early genes in a stimulus-specific manner  

SciTech Connect

The transcription rate of immediate early genes (IEGs) is controlled directly by transcription elongation factors at the transcription elongation step. Negative elongation factor (NELF) and 5,6-dichloro-1-{beta}-D-ribofuranosylbenzimidazole (DRB) sensitivity-inducing factor (DSIF) stall RNA polymerase II (pol II) soon after transcription initiation. Upon induction of IEG transcription, DSIF is converted into an accelerator for pol II elongation. To address whether and how NELF as well as DSIF controls overall IEG transcription, its expression was reduced using stable RNA interference in GH4C1 cells. NELF knock-down reduced thyrotropin-releasing hormone (TRH)-induced transcription of the IEGs c-fos, MKP-1, and junB. In contrast, epidermal growth factor (EGF)-induced transcription of these IEGs was unaltered or even slightly increased by NELF knock-down. Thus, stable knock-down of NELF affects IEG transcription stimulation-specifically. Conversely, DSIF knock-down reduced both TRH- and EGF-induced transcription of the three IEGs. Interestingly, TRH-induced activation of the MAP kinase pathway, a pathway essential for transcription of the three IEGs, was down-regulated by NELF knock-down. Thus, stable knock-down of NELF, by modulating intracellular signaling pathways, caused stimulation-specific loss of IEG transcription. These observations indicate that NELF controls overall IEG transcription via multiple mechanisms both directly and indirectly.

Fujita, Toshitsugu; Piuz, Isabelle [Fondation pour Recherches Medicales, University of Geneva, 64 av. de la Roseraie, 1211 Geneva (Switzerland); Schlegel, Werner [Fondation pour Recherches Medicales, University of Geneva, 64 av. de la Roseraie, 1211 Geneva (Switzerland)], E-mail: werner.schlegel@unige.ch

2009-01-15T23:59:59.000Z

410

Gravo-thermodynamics of the Intracluster Medium: negative heat capacity and dilation of cooling time scales  

E-Print Network (OSTI)

The time scale for cooling of the gravitationally bound gaseous intracluster medium (ICM) is not determined by radiative processes alone. If the ICM is in quasi-hydrostatic equilibrium in the fixed gravitational field of the dark matter halo then energy losses incurred by the gravitational potential energy of the gas should also be taken into account. This "gravitational heating" has been known for a while using explicit solutions to the equations of motion. Here, we re-visit this effect by applying the virial theorem to gas in quasi-hydrostatic equilibrium in an external gravitational field, neglecting the gravity of the gas. For a standard NFW form of halo profiles and for a finite gas density, the response of the gas temperature to changes in the total energy is significantly delayed. The effective cooling time could be prolonged by more than an order of magnitude inside the scale radius ($\\rs$) of the halo. Gas lying at a distance twice the scale radius, has negative heat capacity so that the temperature increases as a result of energy losses. Although external heating (e.g. by AGN activity) is still required to explain the lack of cool ICM near the center, the analysis here may circumvent the need for heating in farther out regions where the effective cooling time could be prolonged to become larger than the cluster age and also explains the increase of temperature with radius in these regions.

Adi Nusser

2008-06-12T23:59:59.000Z

411

A high-intensity plasma-sputter heavy negative ion source  

SciTech Connect

A multicusp magnetic field plasma surface ion source, normally used for H/sup /minus//ion beam formation, has been modified for the generation of high-intensity, pulsed, heavy negative ion beams suitable for a variety of uses. To date, the source has been utilized to produce mA intensity pulsed beams of more than 24 species. A brief description of the source, and basic pulsed-mode operational data, (e.g., intensity versus cesium oven temperature, sputter probe voltage, and discharge pressure), are given. In addition, illustrative examples of intensity versus time and the mass distributions of ion beams extracted from a number of samples along with emittance data, are also presented. Preliminary results obtained during dc operation of the source under low discharge power conditions suggest that sources of this type may also be used to produce high-intensity (mA) dc beams. The results of these investigations are given, as well, and the technical issues that must be addressed for this mode of operation are discussed. 15 refs., 10 figs., 2 tabs.

Alton, G.D.; Mori, Y.; Takagi, A.; Ueno, A.; Fukumoto, S.

1989-01-01T23:59:59.000Z

412

Search for the Shape Resonance in the Negative Ion of Hydrogen in Astrophysical Plasmas  

E-Print Network (OSTI)

In the visible and near infrared, the photoabsorption spectrum of H - , the negative ion of hydrogen, is relatively featureless, with a threshold near 1644 nm and a broad maximum at about 840 nm. However, in the vacuum ultraviolet one finds, embedded in the continuum, a "resonance region" of doubly-excited, singlet P, H - states corresponding to electrons bound to excited hydrogen states. The most prominent of these resonances, the "shape resonance," is formed by an electron bound in a potential with three classical turning points formed by the first excited state of hydrogen. This short-lived state interferes, mostly constructively, with the continuum, to form an asymmetric Fano profile with a width of about 0.22 nm. The shape resonance peak cross section is about 810 -17 cm . Upon autodetachment the n=2 state is preferentially populated, in e#ect, pumping Lyman alpha emission. A nearby narrow, but distinctive, Feshbach resonance could enhance the absorption feature's visibility under certain conditions. In spite of the presumed role of this ion in stellar atmospheres, so far no clear signature for these resonances has been found in astrophysical phenomena.

Stanley Cohen; H. C. Bryant

2000-01-01T23:59:59.000Z

413

Global Failure Criteria for Positive/Electrolyte/Negative Structure of Planar Solid Oxide Fuel Cell  

Science Conference Proceedings (OSTI)

Due to mismatch of the coefficients of thermal expansion of various layers in the positive/electrolyte/negative (PEN) structures of solid oxide fuel cells (SOFC), thermal stresses and warpage on the PEN are unavoidable due to the temperature changes from the stress-free sintering temperature to room temperature during the PEN manufacturing process. In the meantime, additional mechanical stresses will also be created by mechanical flattening during the stack assembly process. In order to ensure the structural integrity of the cell and stack of SOFC, it is necessary to develop failure criteria for SOFC PEN structures based on the initial flaws occurred during cell sintering and stack assembly. In this paper, the global relationship between the critical energy release rate and critical curvature and maximum displacement of the warped cells caused by the temperature changes as well as mechanical flattening process is established so that possible failure of SOFC PEN structures may be predicted deterministically by the measurement of the curvature and displacement of the warped cells.

Liu, Wenning N.; Sun, Xin; Khaleel, Mohammad A.; Qu, Jianmin

2009-07-15T23:59:59.000Z

414

Structural engineering of a phage lysin that targets Gram-negative pathogens  

SciTech Connect

Bacterial pathogens are becoming increasingly resistant to antibiotics. As an alternative therapeutic strategy, phage therapy reagents containing purified viral lysins have been developed against Gram-positive organisms but not against Gram-negative organisms due to the inability of these types of drugs to cross the bacterial outer membrane. We solved the crystal structures of a Yersinia pestis outer membrane transporter called FyuA and a bacterial toxin called pesticin that targets this transporter. FyuA is a {beta}-barrel membrane protein belonging to the family of TonB dependent transporters, whereas pesticin is a soluble protein with two domains, one that binds to FyuA and another that is structurally similar to phage T4 lysozyme. The structure of pesticin allowed us to design a phage therapy reagent comprised of the FyuA binding domain of pesticin fused to the N-terminus of T4 lysozyme. This hybrid toxin kills specific Yersinia and pathogenic E. coli strains and, importantly, can evade the pesticin immunity protein (Pim) giving it a distinct advantage over pesticin. Furthermore, because FyuA is required for virulence and is more common in pathogenic bacteria, the hybrid toxin also has the advantage of targeting primarily disease-causing bacteria rather than indiscriminately eliminating natural gut flora.

Lukacik, Petra; Barnard, Travis J.; Keller, Paul W.; Chaturvedi, Kaveri S.; Seddiki, Nadir; Fairman, James W.; Noinaj, Nicholas; Kirby, Tara L.; Henderson, Jeffrey P.; Steven, Alasdair C.; Hinnebusch, B. Joseph; Buchanan, Susan K. (NIH); (WU-MED)

2012-11-13T23:59:59.000Z

415

Comment on "Negative heat capacities and first order phase transitions in nuclei" by L.G. Moretto et al  

E-Print Network (OSTI)

In a recent paper L.G. Moretto et al [nucl-th/0208024] claim that the negative heat capacities presented in our previously published paper \\cite{PRL2000} are "artifacts" coming from the use of periodic boundary conditions in the Lattice-Gas calculations. We stress in this comment that this claim is wrong: in ref. \\cite{PRL2000} we did not use periodic boundary conditions and anyhow the boundary conditions are irrelevant for the statistical ensemble used in \\cite{PRL2000}. The second claim of [nucl-th/0208024] is that, because of the Coulomb repulsion, systems "with A>60 should present no anomalous negative heat capacities". We show that this conclusion is contradicted by exact Lattice-gas simulations including Coulomb forces which present negative heat capacities even for A>200.

F. Gulminelli; Ph. Chomaz

2003-04-17T23:59:59.000Z

416

Comment on "Negative heat capacities and first order phase transitions in nuclei" by L.G. Moretto et al  

E-Print Network (OSTI)

In a recent paper L.G. Moretto et al [nucl-th/0208024] claim that the negative heat capacities presented in our previously published paper \\cite{PRL2000} are "artifacts" coming from the use of periodic boundary conditions in the Lattice-Gas calculations. We stress in this comment that this claim is wrong: in ref. \\cite{PRL2000} we did not use periodic boundary conditions and anyhow the boundary conditions are irrelevant for the statistical ensemble used in \\cite{PRL2000}. The second claim of [nucl-th/0208024] is that, because of the Coulomb repulsion, systems "with A>60 should present no anomalous negative heat capacities". We show that this conclusion is contradicted by exact Lattice-gas simulations including Coulomb forces which present negative heat capacities even for A>200.

Gulminelli, F; Chomaz, Ph.

2003-01-01T23:59:59.000Z

417

Anomalous ring-down effects and breakdown of the decay rate concept in optical cavities with negative group delay  

E-Print Network (OSTI)

Propagation of light pulses through negative group velocity media is known to give rise to a number of paradoxical situations that seem to violate causality. The solution of these paradoxes has triggered the investigation of a number of interesting and unexpected features of light propagation. Here we report a combined theoretical and experimental study of the ring-down oscillations in optical cavities filled with a medium with such a strongly negative frequency dispersion to give a negative round-trip group delay time. We theoretically anticipate that causality imposes the existence of additional resonance peaks in the cavity transmission, resulting in a non-exponential decay of the cavity field and in a breakdown of the cavity decay rate concept. Our predictions are validated by simulations and by an experiment using a room-temperature gas of metastable helium atoms in the detuned electromagnetically induced transparency regime as the cavity medium.

T. Lauprêtre; S. Schwartz; R. Ghosh; I. Carusotto; F. Goldfarb; F. Bretenaker

2011-07-22T23:59:59.000Z

418

Negative heat capacity in the critical region of nuclear fragmentation: an experimental evidence of the liquid-gas phase transition  

E-Print Network (OSTI)

An experimental indication of negative heat capacity in excited nuclear systems is inferred from the event by event study of energy fluctuations in $Au$ quasi-projectile sources formed in $Au+Au$ collisions at 35 A.MeV. The excited source configuration is reconstructed through a calorimetric analysis of its de-excitation products. Fragment partitions show signs of a critical behavior at about 5 A.MeV excitation energy. In the same energy range the heat capacity shows a negative branch providing a direct evidence of a first order liquid gas phase transition.

M. D'Agostino; F. Gulminelli; Ph. Chomaz; M. Bruno; F. Cannata; R. Bougault; N. Colonna; F. Gramegna; I. Iori; N. Le Neindre; G. V. Margagliotti; P. F. Mastinu; P. M. Milazzo; A. Moroni; G. Vannini

1999-06-07T23:59:59.000Z

419

Large amplitude dust-acoustic double layers in non-thermal plasmas with positive and negative dust  

Science Conference Proceedings (OSTI)

The existence of large amplitude double layers in a plasma composed of cold negative dust, adiabatic positive dust, non-thermal ions and Boltzmann electrons is investigated using the Sagdeev pseudopotential technique. Both positive potential and negative potential double layers are found to be supported by the model. The variation of the maximum amplitudes of the double layers and corresponding Mach numbers are examined as a function of various plasma parameters. In particular, we investigate to what extent ion non-thermal effects are required for positive potential double layers to occur.

Maharaj, S. K. [South African National Space Agency Space Science, P O Box 32, Hermanus 7200 (South Africa); Bharuthram, R. [University of the Western Cape, Modderdam Road, Bellville 7530 (South Africa); Singh, S. V.; Lakhina, G. S. [Indian Institute of Geomagnetism, New Panvel, Navi Mumbai 410218 (India); Pillay, S. R. [University of KwaZulu-Natal, Private Bag X54001, Durban 4000 (South Africa)

2011-11-29T23:59:59.000Z

420

Reconsideration of EPA’s Approval of Vermont’s 2002 Lake Champlain Phosphorus Total Maximum Daily Load (“TMDL”) and Determination to Disapprove the TMDL  

E-Print Network (OSTI)

Section 303(d) of the Clean Water Act (“Act”) requires states to identify waters that do not or are not expected to meet applicable water quality standards after imposition of technology-based controls alone. In that event, the waters are considered “impaired, ” and must be identified or “listed ” under Section 303(d) of the Act. Once such waters are identified, states are to develop TMDLs for any pollutant that is causing the impairment, at a level necessary to attain and maintain the applicable state water quality standards with seasonal variations and a margin of safety that accounts for any lack of knowledge concerning the relationship between effluent limitations and water quality. The “total maximum daily load ” that applies to a water segment is the sum of the “load allocations ” (“LA”) of pollutants from nonpoint sources, the “wasteload allocations ” (“WLA”) of pollutants from point sources, and a margin of safety. 1 See 40 C.F.R. § § 130.2(g)-(i), 130.2(c)(1). Once the public has had the opportunity to review and comment on such TMDLs, states are required to submit the TMDLs to EPA for review and approval. If EPA disapproves a TMDL, it must then establish the TMDL at the level necessary to implement the applicable water quality standards and the state must incorporate the TMDL into its continuing planning process.

A. Statutory; Regulatory Background

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" from the National Library of EnergyBeta (NLEBeta).
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421

False-Negative Rate and Recovery Efficiency Performance of a Validated Sponge Wipe Sampling Method  

SciTech Connect

Recovery of spores from environmental surfaces varies due to sampling and analysis methods, spore size and characteristics, surface materials, and environmental conditions. Tests were performed to evaluate a new, validated sponge wipe method using Bacillus atrophaeus spores. Testing evaluated the effects of spore concentration and surface material on recovery efficiency (RE), false-negative rate (FNR), limit of detection (LOD), and their uncertainties. Ceramic tile and stainless steel had the highest mean RE values (48.9 and 48.1%, respectively). Faux leather, vinyl tile, and painted wood had mean RE values of 30.3, 25.6, and 25.5, respectively, while plastic had the lowest mean RE (9.8%). Results show roughly linear dependences of RE and FNR on surface roughness, with smoother surfaces resulting in higher mean REs and lower FNRs. REs were not influenced by the low spore concentrations tested (3.10x10^-3 to 1.86 CFU/cm^2). Stainless steel had the lowest mean FNR (0.123), and plastic had the highest mean FNR (0.479). The LOD90 (>1 CFU detected 90% of the time) varied with surface material, from 0.015 CFU/cm^2 on stainless steel up to 0.039 on plastic. It may be possible to improve sampling results by considering surface roughness in selecting sampling locations and interpreting spore recovery data. Further, FNR values (calculated as a function of concentration and surface material) can be used presampling to calculate the numbers of samples for statistical sampling plans with desired performance and postsampling to calculate the confidence in characterization and clearance decisions.

Krauter, Paula; Piepel, Gregory F.; Boucher, Raymond; Tezak, Matthew S.; Amidan, Brett G.; Einfeld, Wayne

2012-02-01T23:59:59.000Z

422

The relationship between truck accidents and geometric design of road sections: Poisson versus negative binomial regressions  

SciTech Connect

This paper evaluates the performance of Poisson and negative binomial (NB) regression models in establishing the relationship between truck accidents and geometric design of road sections. Three types of models are considered. Poisson regression, zero-inflated Poisson (ZIP) regression, and NB regression. Maximum likelihood (ML) method is used to estimate the unknown parameters of these models. Two other feasible estimators for estimating the dispersion parameter in the NB regression model are also examined: a moment estimator and a regression-based estimator. These models and estimators are evaluated based on their (1) estimated regression parameters, (2) overall goodness-of-fit, (3) estimated relative frequency of truck accident involvements across road sections, (4) sensitivity to the inclusion of short mad sections, and (5) estimated total number of truck accident involvements. Data from the highway Safety Information System (HSIS) are employed to examine the performance of these models in developing such relationships. The evaluation results suggest that the NB regression model estimated using the moment and regression-based methods should be used with caution. Also, under the ML method, the estimated regression parameters from all three models are quite consistent and no particular model outperforms the other two models in terms of the estimated relative frequencies of truck accident involvements across road sections. It is recommended that the Poisson regression model be used as an initial model for developing the relationship. If the overdispersion of accident data is found to be moderate or high, both the NB and ZIP regression model could be explored. Overall, the ZIP regression model appears to be a serious candidate model when data exhibit excess zeros due, e.g., to underreporting.

Miaou, Shaw-Pin

1993-07-01T23:59:59.000Z

423

Multiple-valued signed-digit adder using negative differential-resistance devices  

E-Print Network (OSTI)

Abstract—This paper describes a new signed-digit full adder (SDFA) circuit consisting of resonant-tunneling diodes (RTDs) and metal-oxide semiconductor field effect transistors (MOSFETs). The design is primarily based on a multiple-valued logic literal circuit that utilizes the folded-back I-V (also known as negative differential-resistance, NDR) characteristics of RTDs to compactly implement its gated transfer function. MOS transistors are configured in current-mode logic, where addition of two or more digits is achieved by superimposing the signals of individual wires being physically connected at the summing nodes. The proposed SDFA design uses redundant arithmetic representation and, therefore, the circuit can perform addition of two arbitrary size binary numbers in constant time without the need for either carry propagation or carry look-ahead. The SDFA cell design has been verified through simulation by an augmented SPICE simulator that includes new homotopy-based convergence routines to tackle the nonlinear device characteristics of quantum devices. From the simulation result, the SDFA cell has been found to perform addition operation in 3.5 nanoseconds, which is somewhat superior to other multivalued redundant arithmetic circuits reported in the literature. The SDFA cell requires only 13 MOS transistors and one RTD, as opposed to the state-of-the-art CMOS redundant binary adder requiring 56 transistors, and to the conventional multivalued current-mode adder consisting of 34 MOS transistors. In order to verify the simulation result, a prototype SDFA cell has been fabricated using MOSIS 2-micron CMOS process and GaAs-based RTDs connected externally to the MOSFET circuit. Index Terms—Signed-digit arithmetic, multiple-valued logic, quantum electronic resonant-tunneling circuits.xxx 1

Ro F. González; Student Member; Pinaki Mazumder; Senior Member

1998-01-01T23:59:59.000Z

424

A new approach to dealing with negative numbers in efficiency analysis: An application to the Indonesian banking sector  

Science Conference Proceedings (OSTI)

Using a new approach, 'SORM SBM' DEA, this paper analyses the efficiency of Indonesian banks during the period 2003-2007. The results prove highly sensitive to both the choice of modelling methodology used to handle negative numbers (i.e., Silva Portela ... Keywords: Banking, Data Envelopment Analysis (DEA), Efficiency, Indonesia

Muliaman D. Hadad; Maximilian J. B. Hall; Karligash A. Kenjegalieva; Wimboh Santoso; Richard Simper

2012-07-01T23:59:59.000Z

425

Modelling the fate and transport of negatively buoyant storm-river water in small multi-basin lakes  

Science Conference Proceedings (OSTI)

The dynamics of negatively buoyant river plumes in a small multi-basin kettle lake with steep bathymetry (Toolik Lake, AK) are simulated using a Cartesian hydrodynamic model based on the solution of the three-dimensional shallow water equations. To validate ... Keywords: Flow paths, Lakes, River, Shallow water models

Francisco J. Rueda; Sally MacIntyre

2010-01-01T23:59:59.000Z

426

CHARGE-EXCHANGE SCATTERING OF NEGATIVE PIONS BY HYDROGEN AT 230,260, 290, 317 AND 371 MeV  

DOE Green Energy (OSTI)

The differential cross section for charge-exchange scattering of negative pions by hydrogen has been observed at 230, 260, 290, 317, and 371 Mev. The reaction was observed by detecting one gamma ray from the {pi}{sup 0} decay with a scintillation-counter telescope.

Caris, John C.

1960-03-18T23:59:59.000Z

427

Negative ion rich plasmas in continuous and pulsed wave modes in a minimum-B magnetic field  

Science Conference Proceedings (OSTI)

Generation of hydrogen negative ion rich plasmas is investigated in continuous wave (CW) and pulse modulated (PM) wave modes of 2.45 GHz in a minimum-B magnetic field. The waves are launched directly into the plasma device and utilize wave particle resonances for high density plasma generation. In CW operation, the chamber is divided into two sections, namely, the source and downstream region, separated by a transverse magnetic field that allows only cold electrons ({approx}1 eV) into the downstream region helpful for the generation of negative ions. The H{sup -} density is measured by the second derivative beat method and is compared with the values obtained from a steady state model and the extracted current density. In the pulsed mode, temporal filtering generates negative ion rich plasmas in the afterglow phase. The H{sup -} density in the afterglow is estimated using saturation current ratio method and the results are compared with a time dependent model using particle balance equations. The essential idea in both the filtering techniques is to assist generation of negative ions and prevent its destruction by hot electrons.

Sahu, Debaprasad; Pandey, Shail; Aneja, Jyoti; Bhattacharjee, Sudeep [Department of Physics, Indian Institute of Technology, Kanpur 208016 (India)

2012-12-15T23:59:59.000Z

428

Web Service Composition Through Declarative Queries: The Case of Conjunctive Queries with Union and Negation  

E-Print Network (OSTI)

A web service operation can be seen as a function op: X1,...,Xn ? Y1,...,Ym having an input message (request) with n arguments (parts), and an output message (response) with m parts [4, Section 2.2]. For example, opB: Author ?{(ISBN, Title)} may implement a books search service, returning for a given author A a list of books authored by A. We propose to model such operations as relations with access pattern, here: B oio (ISBN, Author, Title), where ‘oio ’ indicates that a value for the second attribute must be given as input, while the other attribute values can be retrieved as output. In this way, a family of web service operations over k attributes can be concisely described as a relation R(A1,...,Ak) with an associated set of access patterns P?{i, o} k. Since we model web services as relations with access patterns, we can now use queries as a declarative specifications for web service composition: e.g., the query Q(I, A, T) ? ? B(I, A, T),C(I,A), ¬L(I) asks for books available through a store B which are contained in a catalog C, but not in the local library L. Let the only access patterns be B ioo, B oio, C oo, and L o. If we try to execute Q from left to right, neither pattern for B works since we either lack an ISBN I or an author A. However, Q is feasible since we can execute it by first calling C(I,A) which binds both I and A; after that, calling B ioo (or B oio) will work. Calling ¬L(I) first and then B does not work: a negated call can only filter out answers, but cannot produce any new variable bindings. 2. Formal Results We study the problem of deciding whether a query Q is feasible, i.e., whether there exists a logically equivalent query Q ? that can be executed observing the limited access patterns given by the web service (source) relations. Executability depends on the specific syntactic form of a query, while feasibility is a more “robust ” semantic notion, in-

Bertram Ludäscher; Alan Nash

2004-01-01T23:59:59.000Z

429

Study of small carbon and semiconductor clusters using negative ion threshold photodetachment spectroscopy  

SciTech Connect

The bonding and electronics of several small carbon and semiconductor clusters containing less than ten atoms are probed using negative ion threshold photodetachment (zero electron kinetic energy, or ZEKE) spectroscopy. ZEKE spectroscopy is a particularly advantageous technique for small cluster study, as it combines mass selection with good spectroscopic resolution. The ground and low-lying electronic states of small clusters in general can be accessed by detaching an electron from the ground anion state. The clusters studied using this technique and described in this work are C{sub 6}{sup {minus}}/C{sub 6}, Si{sub n}{sup {minus}}/Si{sub n} (n = 2, 3, 4), Ge{sub 2}{sup {minus}}/Ge{sub 2}, In{sub 2}P{sup {minus}}/In{sub 2}P,InP{sub 2}{sup {minus}}/InP{sup 2}, and Ga{sub 2}As{sup {minus}}. The total photodetachment cross sections of several other small carbon clusters and the ZEKE spectrum of the I{sup {minus}}{center_dot}CH{sub 3}I S{sub N}2 reaction complex are also presented to illustrate the versatility of the experimental apparatus. Clusters with so few atoms do not exhibit bulk properties. However, each specie exhibits bonding properties that relate to the type of bonding found in the bulk. C{sub 6}, as has been predicted, exhibits a linear cumulenic structure, where double bonds connect all six carbon atoms. This double bonding reflects how important {pi} bonding is in certain phases of pure carbon (graphite and fullerenes). The symmetric stretch frequencies observed in the C{sub 6}{sup {minus}} spectra, however, are in poor agreement with the calculated values. Also observed as sharp structure in total photodetachment cross section scans was an excited anion state bound by only {approximately}40 cm{sup {minus}1} relative to the detachment continuum. This excited anion state appears to be a valence bound state, possible because of the high electron affinity of C{sub 6}, and the open shell of the anion.

Arnold, C.C.

1994-08-01T23:59:59.000Z

430

03/01/2006 09:51 AMLoading "People's Daily Online --Chinese experimental thermonuclear reactor on discharge test in July" Page 1 of 1http://english.people.com.cn/200603/01/print20060301_247035.html  

E-Print Network (OSTI)

the commercialized nuclear reactors in the world were designed for fission, a process contrary to the ITER's fusion03/01/2006 09:51 AMLoading "People's Daily Online -- Chinese experimental thermonuclear reactor experimental thermonuclear reactor on discharge test in July China's new generation experimental Tokamak fusion

431

Quantization of Friedmann-Robertson-Walker spacetimes in the presence of a negative cosmological constant and radiation  

Science Conference Proceedings (OSTI)

In the present work, we quantize three Friedmann-Robertson-Walker models in the presence of a negative cosmological constant and radiation. The models differ from each other by the constant curvature of their spatial sections, which may be positive, negative or zero. They give rise to Wheeler-DeWitt equations for the scale factor which have the form of the Schroedinger equation for the quartic anharmonic oscillator. We find their eigenvalues and eigenfunctions by using a method first developed by Chhajlany and Malnev. After that, we use the eigenfunctions in order to construct wave packets for each case and evaluate the time-dependent expectation value of the scale factors, which are found to oscillate between finite maximum and minimum values. Since the expectation values of the scale factors never vanish, we have an initial indication that these models may not have singularities at the quantum level.

Monerat, G.A.; Silva, E.V. Correa; Oliveira-Neto, G. [Departamento de Matematica e Computacao, Faculdade de Tecnologia, Universidade do Estado do Rio de Janeiro, Estrada Resende-Riachuelo, s/no, Morada da Colina, CEP 27523-000, Resende-RJ (Brazil); Filho, L.G. Ferreira [Departamento de Mecanica e Energia, Faculdade de Tecnologia, Universidade do Estado do Rio de Janeiro, Estrada Resende-Riachuelo, s/no, Morada da Colina, CEP 27523-000 , Resende-RJ (Brazil); Lemos, N.A. [Instituto de Fisica, Universidade Federal Fluminense, R. Gal. Milton Tavares de Souza s/no, Boa Viagem, CEP 24210-340, Niteroi-RJ (Brazil)

2006-02-15T23:59:59.000Z

432

Shared money, less conflict, stronger marriages: The relationship between money ownership perceptions, negative communication, financial satisfaction, marital satisfaction and marital instability.  

E-Print Network (OSTI)

??The current study tests a conceptual model exploring the relationship between perceived money ownership (PMO) in marriage, negative communication, financial satisfaction, marital satisfaction and marital… (more)

Boyle, Jeremy

2012-01-01T23:59:59.000Z

433

Excitation of Meinel and the first negative band system at the collision of electrons and protons with the nitrogen molecule  

Science Conference Proceedings (OSTI)

The absolute cross sections for the e-N{sub 2} and p-N{sub 2} collisions for the first negative B{sup 2{Sigma}}{sub u}{sup +}-X{sup 2{Sigma}}{sub g}{sup +} and Meinel A{sup 2{Pi}}{sub u}-X{sup 2{Sigma}}{sub g}{sup +} bands have been measured in the energy region of 400-1500 eV for electrons and 0.4-10 keV for protons, respectively. Measurements are performed in the visible spectral region of 400-800 nm by an optical spectroscopy method. The ratio of the cross sections of the Meinel band system to the cross section of the first negative band system (0,0) does not depend on the incident electron energy. The populations of vibrational levels corresponding to A{sup 2{Pi}}{sub u} states are consistent with the Franck-Condon principle. The ratios of the cross sections of (4,1) to (3,0) bands and (5,2) to (3,0) bands exhibit slight dependence on the proton energy. A theoretical estimation within the quasimolecular approximation provides a reasonable description of the total cross section for the first negative band.

Gochitashvili, Malkhaz R.; Lomsadze, Ramaz A. [Physics Department, Tbilisi State University, Tbilisi 380028 (Georgia); Kezerashvili, Roman Ya. [Physics Department, New York City College of Technology, City University of New York, Brooklyn, New York 11201 (United States); Graduate School and University Center, City University of New York, New York, New York 10016 (United States)

2010-08-15T23:59:59.000Z

434

Work function measurements during plasma exposition at conditions relevant in negative ion sources for the ITER neutral beam injection  

SciTech Connect

Cesium seeded sources for surface generated negative hydrogen ions are major components of neutral beam injection systems in future large-scale fusion experiments such as ITER. The stability and delivered current density depend highly on the work function during vacuum and plasma phases of the ion source. One of the most important quantities that affect the source performance is the work function. A modified photocurrent method was developed to measure the temporal behavior of the work function during and after cesium evaporation. The investigation of cesium exposed Mo and MoLa samples under ITER negative hydrogen ion based neutral beam injection relevant surface and plasma conditions showed the influence of impurities which result in a fast degradation when the plasma exposure or the cesium flux onto the sample is stopped. A minimum work function close to that of bulk cesium was obtained under the influence of the plasma exposition, while a significantly higher work function was observed under ITER-like vacuum conditions.

Gutser, R. [Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, 85748 Garching (Germany); Wimmer, C. [Lst. f. Experimentelle Plasmaphysik, Universitaet Augsburg, 86135 Augsburg (Germany); Fantz, U. [Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, 85748 Garching (Germany); Lst. f. Experimentelle Plasmaphysik, Universitaet Augsburg, 86135 Augsburg (Germany)

2011-02-15T23:59:59.000Z

435

PHYSICS AND CONTROL OF ELMING H-MODE NEGATIVE CENTRAL SHEAR ADVANCED TOKAMAK SCENARIO BASED ON EXPERIMENTAL PROFILES FOR ITER  

SciTech Connect

A271 PHYSICS AND CONTROL OF ELMING H-MODE NEGATIVE CENTRAL SHEAR ADVANCED TOKAMAK SCENARIO BASED ON EXPERIMENTAL PROFILES FOR ITER. Key DIII-D AT experimental and modeling results are applied to examine the physics and control issues for ITER to operate in a negative central shear (NCS) AT scenario. The effects of a finite edge pressure pedestal and current density are included based on the DIII-D experimental profiles. Ideal and resistive stability analyses indicate that feedback control of resistive wall modes by rotational drive or flux conserving intelligent coils is crucial for these AT configurations to operate at attractive {beta}{sub N} values in the range of 3.0-3.5. Vertical stability and halo current analyses show that reliable disruption mitigation is essential and mitigation control using an impurity gas can significantly reduce the local mechanical stress to an acceptable level. Core transport and turbulence analyses demonstrate that control of the rotational shear profile is essential to maintain the good confinement necessary for high {beta}. Consideration of edge stability and core transport suggests that a sufficiently wide pedestal is necessary for the projected fusion performance. Heat flux analyses indicate that with core-only radiation enhancement the outboard peak divertor heat load is near the design limit of 10 MW/m{sup 2}

LAO,LL; CHAN,VS; EVANS,TE; HUMPHREYS,DA; LEUER,JA; MAHDAVI,MA; PETRIE,TW; SNYDER,PB; STJOHN,HE; STAEBLER,GM; STAMBAUGH,RD; TAYLOR,TS; TURNBULL,AD; WEST,WP; BRENNAN,DP

2002-11-01T23:59:59.000Z

436

Measurements of scattering processes in negative ion-atom collisions. Technical progress report, 1 September 1992--31 August 1993  

DOE Green Energy (OSTI)

This Technical Progress Report describes the progress made on the research objectives during the past twelve months. This research project is designed to provide measurements of various scattering processes which occur in H{sup {minus}} collisions with atomic (specifically, noble gas and atomic hydrogen) targets at intermediate energies. These processes include elastic scattering, single- and double-electron detachment, and target excitation/ionization. For the elastic and target inelastic processes where H{sup {minus}} is scattered intact, the experimental technique of Ion Energy-Loss Spectroscopy (IELS) will be employed to identify the final target state(s). In most of the above processes, cross sections are unknown both experimentally and theoretically. The measurements in progress will provide either experimentally determined cross sections or set upper limits to those cross sections. In either case, these measurements will be stringent tests of our understanding in energetic negative ion - atom collisions. In addition secondary negative particle emission yields for H{sup 0} on Cu in the 3 to 50 keV range are shown.

Kvale, T.J.

1993-05-01T23:59:59.000Z

437

Perspective on the Role of Negative Ions and Ion-Ion Plasmas in Heavy Ion Fusion Science, Magnetic Fusion Energy, and Related Fields  

E-Print Network (OSTI)

of positive and negative chlorine ions, with only a smalltest case. We chose chlorine because, unlike iodine orTwo sets of experiments with chlorine using different RF ion

Kwan, J.W.

2008-01-01T23:59:59.000Z

438

Symmetry-protected topological order and negative-sign problem for SO(N) bilinear-biquadratic chains  

E-Print Network (OSTI)

Using a generalized Jordan-Wigner transformation combined with the defining representation of the SO(N) spin, we map the SO(N) bilinear-biquadratic(BLBQ) spin chain into the N-color bosonic particle model. We find that, when the Jordan-Wigner transformation disentangles the symmetry-protected topological entanglement, this bosonic model becomes negative-sign free in the context of quantum Monte-Carlo simulation. For the SO(3) case, moreover, Kennedy-Tasaki's transformation for the S=1 BLBQ chain, which is also a topological disentangler, derives the same bosonic model through the dimer-R bases. We present temperature dependence of energy, entropy and string order parameter for the SO(N=3, 4, 5) BLBQ chains by the world-line Monte-Carlo simulation for the N-color bosonic particle model.

Kouichi Okunishi; Kenji Harada

2013-12-10T23:59:59.000Z

439

Stability estimates for an inverse problem for the Schr\\"odinger equation at negative energy in two dimensions  

E-Print Network (OSTI)

We study the inverse problem of determining a real-valued potential in the two-dimensional Schr\\"odinger equation at negative energy from the Dirichlet-to-Neumann map. It is known that the problem is ill-posed and a stability estimate of logarithmic type holds. In this paper we prove three new stability estimates. The main feature of the first one is that the stability increases exponentially with respect to the smoothness of the potential, in a sense to be made precise. The others show how the first estimate depends on the energy, for low and high energies (in modulus). In particular it is found that for high energies the stability estimate changes, in some sense, from logarithmic type to Lipschitz type: in this sense the ill-posedness of the problem decreases when increasing the energy (in modulus).

Santacesaria, Matteo

2012-01-01T23:59:59.000Z

440

Moderate Degree of Input Negative Entropy Flow and Decrease of Entropy in Astrophysics, Biology, Psychology and Social Systems  

E-Print Network (OSTI)

Thermodynamics have been applied to astronomy, biology, psychology, some social systems and so on. But, various evolutions from astronomy to biology and social systems cannot be only increase of entropy. When fluctuations are magnified due to internal interactions, the statistical independence and the second law of the thermodynamics are not hold. The existence of internal interactions is necessary condition of decrease of entropy in isolated system. We calculate quantitatively the entropy of plasma. Then we discuss the thermodynamics of biology, and obtain a mathematical expression on moderate degree of input negative entropy flow, which is a universal scientific law. Further, the thermodynamics of physiology and psychology, and the thought field are introduced. Qigong and various religious practices are related to these states of order, in which decrease of entropy is shown due to internal interactions of the isolated systems. Finally we discuss possible decrease of entropy in some social systems.

Yi-Fang Chang

2009-10-04T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Whole-Pelvis or Bladder-Only Chemoradiation for Lymph Node-Negative Invasive Bladder Cancer: Single-Institution Experience  

SciTech Connect

Purpose: Whole-pelvis (WP) concurrent chemoradiation (CCRT) is the standard bladder preserving option for patients with invasive bladder cancer. The standard practice is to treat elective pelvic lymph nodes, so our aim was to evaluate whether bladder-only (BO) CCRT leads to results similar to those obtained by standard WP-CCRT. Methods and Materials: Patient eligibility included histopathologically proven muscle-invasive bladder cancer, lymph nodes negative (T2-T4, N-) by radiology, and maximal transurethral resection of bladder tumor with normal hematologic, renal, and liver functions. Between March 2005 and May 2006, 230 patients were accrued. Patients were randomly assigned to WP-CCRT (120 patients) and BO-CCRT (110 patients). Data regarding the toxicity profile, compliance, initial complete response rates at 3 months, and occurrence of locoregional or distant failure were recorded. Results: With a median follow-up time of 5 years (range, 3-6), WP-CCRT was associated with a 5-year disease-free survival of 47.1% compared with 46.9% in patients treated with BO-CCRT (p = 0.5). The bladder preservation rates were 58.9% and 57.1% in WP-CCRT and BO-CCRT, respectively (p = 0.8), and the 5-year overall survival rates were 52.9% for WP-CCRT and 51% for BO-CCRT (p = 0.8). Conclusion: BO-CCRT showed similar rates of bladder preservation, disease-free survival, and overall survival rates as those of WP-CCRT. Smaller field sizes including bladder with 2-cm margins can be used as bladder preservation protocol for patients with muscle-invasive lymph node-negative bladder cancer to minimize the side effects of CCRT.

Tunio, Mutahir A., E-mail: drmutahirtonio@hotmail.com [Department of Radiation Oncology, Sindh Institute of Urology and Transplantation, Karachi (Pakistan); Hashmi, Altaf [Department of Urology, Sindh Institute of Urology and Transplantation, Karachi (Pakistan); Qayyum, Abdul [Department of Medical Oncology, Sindh Institute of Urology and Transplantation, Karachi (Pakistan); Mohsin, Rehan [Department of Urology, Sindh Institute of Urology and Transplantation, Karachi (Pakistan); Zaeem, Ahmed [Department of Medical Physics, Sindh Institute of Urology and Transplantation, Karachi (Pakistan)

2012-03-01T23:59:59.000Z

442

Perspective on the Role of Negative Ions and Ion-Ion Plasmas in Heavy Ion Fusion Science, Magnetic Fusion Energy, and Related Fields  

DOE Green Energy (OSTI)

Some years ago it was suggested that halogen negative ions [1]could offer a feasible alternative path to positive ions as a heavy ion fusion driver beam which would not suffer degradation due to electron accumulation in the accelerator and beam transport system, and which could be converted to a neutral beam by photodetachment near the chamber entrance if desired. Since then, experiments have demonstrated that negative halogen beams can be extracted and accelerated away from the gas plume near the source with a surviving current density close to what could be achieved with a positive ion of similar mass, and with comparable optical quality. In demonstrating the feasibility of halogen negative ions as heavy ion driver beams, ion - ion plasmas, an interesting and somewhat novel state of matter, were produced. These plasmas, produced near the extractor plane of the sources, appear, based upon many lines of experimental evidence, to consist of almost equal densities of positive and negative chlorine ions, with only a small component of free electrons. Serendipitously, the need to extract beams from this plasma for driver development provides a unique diagnostic tool to investigate the plasma, since each component - positive ions, negative ions, and electrons -- can be extracted and measured separately. We discuss the relevance of these observations to understanding negative ion beam extraction from electronegative plasmas such as halogens, or the more familiar hydrogen of magnetic fusion ion sources. We suggest a concept which might improve negative hydrogen extraction by the addition of a halogen. The possibility and challenges of producing ion-ion plasmas with thin targets of halogens or, perhaps, salt, is briefly addressed.

Grisham, L.R.; Kwan, J.W.

2008-08-01T23:59:59.000Z

443

Quantum effects in electron emission from and accretion on negatively charged spherical particles in a complex plasma  

Science Conference Proceedings (OSTI)

The authors have investigated the electron emissions (thermionic, electric field, photoelectric, and light induced field) from and electron accretion on a charged particle in a complex plasma, on the basis of a three region electrical potential model in and around a charged spherical particle in a complex plasma, characterized by Debye shielding. A continuous variation of the transmission coefficient across the surface of a particle (corresponding to emission and accretion) with the radial electron energy {epsilon}{sub r} has been obtained. It is seen that the numerical values of the emission and accretion transmission coefficients [D({epsilon}{sub r})] are almost the same. This is the necessary and sufficient condition for the validity of Saha's equation for thermal equilibrium of a system of dust and electrons. This is in contrast to the earlier condition, which limited the range of validity of Saha's equation to the range of the applicability of Born approximation. It is seen that D({epsilon}{sub r}) increases with increasing {epsilon}{sub r}, increasing negative electric potential on the surface, decreasing radius, and deceasing Debye length. The electron currents, corresponding to thermionic, electric field, photoelectric and light induced field emission increase with increasing surface potential; this fact may have significant repercussions in complex plasma kinetics. Since numerically D({epsilon}{sub r}) is significantly different from unity in the range of {epsilon}{sub r} of interest, it is necessary to take into account the D({epsilon}{sub r})-{epsilon}{sub r} dependence in complex plasma theory.

Mishra, S. K. [Institute for Plasma Research, Gandhinagar (India); Sodha, M. S.; Misra, Shikha [DST Project, Department of Education Building, University of Lucknow, Lucknow-226007 (India)

2012-07-15T23:59:59.000Z

444

Utilizing upper hybrid resonance for high density plasma production and negative ion generation in a downstream region  

Science Conference Proceedings (OSTI)

Localized wave-induced resonances are created by microwaves launched directly into a multicusp (MC) plasma device in the k Up-Tack B mode, where k is the wave vector and B is the static magnetic field. The resonance zone is identified as upper hybrid resonance (UHR), and lies r = {approx}22 mm away from the MC boundary. Measurement of radial wave electric field intensity confirms the right hand cutoff of the wave (r = 22.5-32.1 mm) located near the UHR zone. A sharp rise in the corresponding electron temperature in the resonance region by {approx}13 eV from its value away from resonance at r = 0, is favorable for the generation of vibrationally excited molecules of hydrogen. A transverse magnetic filter allows cold electrons ({approx}1-2 eV) to pass into the downstream region where they generate negative ions by dissociative attachment. Measurements of electron energy distribution function (EEDF) support the viewpoint. H{sup -} current density of {approx}0.26 mA/cm{sup 2} is obtained at a wave power density of {approx}3 W/cm{sup 2} at 2.0 mTorr pressure, which agrees reasonably well with results obtained from a steady state model using particle balance equations.

Sahu, Debaprasad; Bhattacharjee, Sudeep [Department of Physics, Indian Institute of Technology, Kanpur 208016 (India)

2012-09-15T23:59:59.000Z

445

In-Cylinder Reaction Chemistry and Kinetics During Negative Valve Overlap Fuel Injection Under Low-Oxygen Conditions  

DOE Green Energy (OSTI)

Fuel injection into the negative valve overlap (NVO) period is a common method for controlling combustion phasing in homogeneous charge compression ignition (HCCI) as well as other forms of advanced combustion. During this event, at least a portion of the fuel hydrocarbons can be converted to products containing significant levels of H2 and CO, as well as other short chain hydrocarbons by means of thermal cracking, water-gas shift, and partial oxidation reactions, depending on the availability of oxygen and the time-temperature-pressure history. The resulting products alter the autoignition properties of the combined fuel mixture for HCCI. Fuel-rich chemistry in a partial oxidation environment is also relevant to other high efficiency engine concepts (e.g., the dedicated EGR (D-EGR) concept from SWRI). In this study, we used a unique 6-stroke engine cycle to experimentally investigate the chemistry of a range of fuels injected during NVO under low oxygen conditions. Fuels investigated included iso-octane, iso-butanol, ethanol, and methanol. Products from NVO chemistry were highly dependent on fuel type and injection timing, with iso-octane producing less than 1.5% hydrogen and methanol producing more than 8%. We compare the experimental trends with CHEMKIN (single zone, 0-D model) predictions using multiple kinetic mechanisms available in the current literature. Our primary conclusion is that the kinetic mechanisms investigated are unable to accurately predict the magnitude and trends of major species we observed.

Kalaskar, Vickey B [ORNL] [ORNL; Szybist, James P [ORNL] [ORNL; Splitter, Derek A [ORNL] [ORNL; Pihl, Josh A [ORNL] [ORNL; Gao, Zhiming [ORNL] [ORNL; Daw, C Stuart [ORNL] [ORNL

2013-01-01T23:59:59.000Z

446

False negative rate and other performance measures of a sponge-wipe surface sampling method for low contaminant concentrations.  

DOE Green Energy (OSTI)

Recovery of spores from environmental surfaces is known to vary due to sampling methodology, techniques, spore size and characteristics, surface materials, and environmental conditions. A series of tests were performed to evaluate a new, validated sponge-wipe method. Specific factors evaluated were the effects of contaminant concentrations and surface materials on recovery efficiency (RE), false negative rate (FNR), limit of detection (LOD) - and the uncertainties of these quantities. Ceramic tile and stainless steel had the highest mean RE values (48.9 and 48.1%, respectively). Faux leather, vinyl tile, and painted wood had mean RE values of 30.3, 25.6, and 25.5, respectively, while plastic had the lowest mean RE (9.8%). Results show a roughly linear dependence of surface roughness on RE, where the smoothest surfaces have the highest mean RE values. REs were not influenced by the low spore concentrations tested (3 x 10{sup -3} to 1.86 CFU/cm{sup 2}). The FNR data were consistent with RE data, showing a trend of smoother surfaces resulting in higher REs and lower FNRs. Stainless steel generally had the lowest mean FNR (0.123) and plastic had the highest mean FNR (0.479). The LOD{sub 90} varied with surface material, from 0.015 CFU/cm{sup 2} on stainless steel up to 0.039 on plastic. Selecting sampling locations on the basis of surface roughness and using roughness to interpret spore recovery data can improve sampling. Further, FNR values, calculated as a function of concentration and surface material, can be used pre-sampling to calculate the numbers of samples for statistical sampling plans with desired performance, and post-sampling to calculate the confidence in characterization and clearance decisions.

Einfeld, Wayne; Krauter, Paula A.; Boucher, Raymond M.; Tezak, Mathew; Amidan, Brett G. (Pacific Northwest National Laboratory, Richland, WA); Piepel, Greg F. (Pacific Northwest National Laboratory, Richland, WA)

2011-05-01T23:59:59.000Z

447

Coral Uptake of Inorganic Phosphorus and Nitrogen Negatively Affected by Simultaneous Changes in Temperature and pH  

E-Print Network (OSTI)

The effects of ocean acidification and elevated seawater temperature on coral calcification and photosynthesis have been extensively investigated over the last two decades, whereas they are still unknown on nutrient uptake, despite their importance for coral energetics. We therefore studied the separate and combined impacts of increases in temperature and pCO2 on phosphate, ammonium, and nitrate uptake rates by the scleractinian coral S. pistillata. Three experiments were performed, during 10 days i) at three pHT conditions (8.1, 7.8, and 7.5) and normal temperature (26uC), ii) at three temperature conditions (26u, 29uC, and 33uC) and normal pHT (8.1), and iii) at three pHT conditions (8.1, 7.8, and 7.5) and elevated temperature (33uC). After 10 days of incubation, corals had not bleached, as protein, chlorophyll, and zooxanthellae contents were the same in all treatments. However, photosynthetic rates significantly decreased at 33uC, and were further reduced for the pHT 7.5. The photosynthetic efficiency of PSII was only decreased by elevated temperature. Nutrient uptake rates were not affected by a change in pH alone. Conversely, elevated temperature (33uC) alone induced an increase in phosphate uptake but a severe decrease in nitrate and ammonium uptake rates, even leading to a release of nitrogen into seawater. Combination of high temperature (33uC) and low pHT (7.5) resulted in a significant decrease in phosphate and nitrate uptake rates compared to control corals (26uC, pHT = 8.1). These results indicate that both inorganic nitrogen and phosphorus metabolism may be negatively affected by the cumulative effects of ocean warming and

Claire Godinot; Fanny Houlbrèque; Renaud Grover; Christine Ferrier-pagès

2011-01-01T23:59:59.000Z

448

An Analysis on the Negative Effects of E-government Information Opening: Case Study of Coal Administrative Information Opening in Shanxi Province  

Science Conference Proceedings (OSTI)

Based on coal administrative information opening in Shanxi Province, the paper reviews the related domestic and foreign studies on the effect of e-government information opening, collects a large number of data through the questionnaires from the view ... Keywords: e-government, information opening, negative effects, information diffusion.

Du Zhan-qi; Yao-wen Xue; Peng-zhu Zhang

2009-05-01T23:59:59.000Z

449

The good, the bad, or the useful? the examination of the relationship between the feedback-related negativity frn and long-term learning outcomes  

Science Conference Proceedings (OSTI)

According to the reinforcement learning account of the error-related negativity ERN, the ERN is a manifestation of a signal generated in ACC as a consequence of a phasic decrease in the activity of the mesencephalic dopamine system occurring when the ...

Yael Arbel; Kristen Goforth; Emanuel Donchin

2013-08-01T23:59:59.000Z

450

Production of negative ions on graphite surface in H{sub 2}/D{sub 2} plasmas: Experiments and srim calculations  

Science Conference Proceedings (OSTI)

In previous works, surface-produced negative-ion distribution-functions have been measured in H{sub 2} and D{sub 2} plasmas using graphite surfaces (highly oriented pyrolitic graphite). In the present paper, we use the srim software to interpret the measured negative-ion distribution-functions. For this purpose, the distribution-functions of backscattered and sputtered atoms arising due to the impact of hydrogen ions on a-CH and a-CD surfaces are calculated. The srim calculations confirm the experimental deduction that backscattering and sputtering are the mechanisms of the origin of the creation of negative ions at the surface. It is shown that the srim calculations compare well with the experiments regarding the maximum energy of the negative ions and reproduce the experimentally observed isotopic effect. A discrepancy between calculations and measurements is found concerning the yields for backscattering and sputtering. An explanation is proposed based on a study of the emitted-particle angular-distributions as calculated by srim.

Cartry, G.; Ahmad, A.; Carrere, M; Layet, J. M. [Aix-Marseille University, CNRS, PIIM, UMR 6633, Centre Scientifique de Saint Jerome, Case 241, 13397 Marseille Cedex 20 (France); Schiesko, L.; Hopf, C. [Max-Planck-Institut fuer Plasmaphysik, EURATOM Association, Boltzmannstr. 2, 85748 Garching (Germany); Kumar, P. [Inter University Accelerator Centre (IUAC), New Delhi 110067 (India); Engeln, R. [Department of Applied Physics, Eindhoven University of Technology, Eindhoven (Netherlands)

2012-06-15T23:59:59.000Z

451

ARRA521 Recovery Act - Project Daily Report  

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

Spend Plan Spend Plan Obligated to Contracts Payments to Date Unpaid Balance Argonne National Laboratory $79,000,000 $79,000,000 $78,471,376 $528,624 Brookhaven National Laboratory $70,810,000 $70,809,616 $70,809,616 $0 Energy Technology Engineering Center $51,675,000 $51,675,000 $51,675,000 $0 Hanford (Office of River Protection) $326,035,000 $325,999,617 $325,999,617 $0 Hanford (Richland) $1,634,500,000 $1,633,901,799 $1,633,277,979 $623,821 Idaho $467,875,000 $467,840,907 $467,840,907 $0 Los Alamos National Laboratory $211,975,000 $211,954,781 $211,954,781 $0 Moab $108,350,000 $108,350,000 $108,204,128 $145,872 Mound $17,900,000 $17,525,587 $17,525,587 $0 Nevada Nuclear Security Site $44,325,000 $44,300,871 $44,300,869 $2 Oak Ridge $755,110,000 $754,990,004 $739,849,558 $15,140,447 Paducah $80,400,000 $80,400,000

452

Asymetric change of daily temperature range: Proceedings  

SciTech Connect

This report is a compilation of abstracts of papers presented at the MINIMAX workshop. Topics include; temperature fluxes, influence of clouds on temperature, anthropogenic influences on temperature flux, and carbon dioxide and aerosol induced greenhouse effect.

Kukla, G. [ed.] [Columbia Univ., Palisades, NY (United States). Lamont-Doherty Earth Observatory; Karl, T.R. [ed.] [National Climatic Data Center, Asheville, NC (United States); Riches, M.R. [ed.] [USDOE, Washington, DC (United States)

1994-04-01T23:59:59.000Z

453

DOE Solar Decathlon: 2005 Daily Journals  

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

sky, allowing the first rays of sunshine we have seen in more than a week to dapple solar panels and brighten facades along Decathlete Way. Read more. Friday October 14, 2005...

454

Daily Scheduling of Nurses in Operating Suites  

E-Print Network (OSTI)

This, in turn, leads to reduced patient safety and substandard treatment ... to improve the nurse scheduling process (Ernst et al., 2004). Recent surveys include ...

455

PRICM-3: Daily Tour Information - TMS  

Science Conference Proceedings (OSTI)

The conference will be held July 12-16, 1998, at the Hilton Hawaiian Village Hotel, in Honolulu, ... Arizona Memorial, City Tour & Hilo Hattie .... See tranquil coves, rolling surf, huge breakers crashing against rocky cliffs and lush tropical forests.

456

Modeling and Forecasting Electric Daily Peak Loads  

E-Print Network (OSTI)

Forecast Update As part of the Mid Term Assessment, staff is preparing a long term wholesale electricity 29, 2012 Preliminary Results of the Electricity Price Forecast Update As part of the Mid Term Assessment, staff is preparing a long term wholesale electricity market price forecast. A summary of the work

Abdel-Aal, Radwan E.

457

DAILY RESEARCH NEWS | Data.gov  

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

avermissick@ars.usda.gov Unique Identifier USDA-1141 Public Access Level public Data Dictionary Data Download URL http:ars.usda.govnewsrssrss.htm Format rss License Spatial...

458

A persistent daily rhythm in photosynthesis  

E-Print Network (OSTI)

A ~ STR ACT The luminescent marine dinoflagellate, Gonyaulax polyedra, exhibits a diurnal rhythm in the rate of photosynthesis and photosynthetic capacity measured by incorporation of C140 ~ at different times of day. With cultures grown on alternating light and dark periods of 12 hours each, the maximum rate is at the 8th hour of the light period. Cultures transferred from day-night conditions to continuous dim light continue to show the rhythm of photosynthetic capacity (activity measured in bright light) but not of photosynthesis (activity measured in existing dim light). Cultures transferred to continuous bright light, however, do not show any rhythm. Several other properties of the photosynthetic rhythm are similar to those of previously reported rhythms of luminescence and cell division. This similarity suggests that a single mechanism regulates the various rhythms.

J. Woodland Hastings; Lazarus Astrachan; Beatrice M. Sweeney

1961-01-01T23:59:59.000Z

459

EIA initiates daily gasoline availability survey for ...  

U.S. Energy Information Administration (EIA)

To develop the emergency survey, EIA used the representative sample of retail stations selling gasoline used in EIA's Form EIA-878, "Motor Gasoline ...

460

Chemical and Charge Imbalance Induced by Radionuclide Decay: Effects on Waste Form Structure  

Science Conference Proceedings (OSTI)

This is a technical report summarizing the experimental and theoretical results for model waste form of aluminosilicate pollucite, obtained from January to September, 2012.

Jiang, Weilin; Van Ginhoven, Renee M.

2012-09-28T23:59:59.000Z

Note: This page contains sample records for the topic "negative daily imbalances" 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

Chemical and Charge Imbalance Induced by Radionuclide Decay: Effects on Waste Form Structure  

SciTech Connect

This is a milestone document covering the activities to validate theoretical calculations with experimental data for the effect of the decay of 90Sr to 90Zr on materials properties. This was done for a surragate waste form strontium titanate.

Van Ginhoven, Renee M.; Jaffe, John E.; Jiang, Weilin; Strachan, Denis M.

2011-04-01T23:59:59.000Z

462

Basal Ganglia Disorders Associated with Imbalances in the Striatal Striosome and Matrix Compartments  

E-Print Network (OSTI)

The striatum is composed principally of GABAergic, medium spiny striatal projection neurons (MSNs) that can be categorized based on their gene expression, electrophysiological profiles, and input–output circuits. Major ...

Crittenden, Jill R.

463

Report of a workshop on the impact of chemicals on the radiative transfer imbalance  

SciTech Connect

This workshop delineates the significant factors, possessed by any chemical, that may directly or indirectly affect the radiation balance of the atmosphere. Atmospheric physics research has already given information on direct and indirect effects. An example of direct effect is the cumulative infrared greenhouse effect of several trace gases, some of which are anthropogenic, and the short wave radiative effects of unactivated aerosol particles in clouds. Examples of indirect effects are those of aerosols as they change cloud droplet size distributions and hence albedo and radiative properties, and as found in observations of albedo and absorption anomalies in clouds, and cloud modification by urban pollution. 26 references.

DeLuisi, J.J. (ed.)

1979-01-01T23:59:59.000Z

464

Power Reduction Scheme of Fans in a Blade System by Considering the Imbalance of CPU Temperatures  

Science Conference Proceedings (OSTI)

In order to develop a data center power efficiency index, we built a test bed of a data center and measured power components and environmental variables in some detail, including the power consumption and temperature of each node, rack and air conditioning ... Keywords: Data center, Power consumption, Power efficiency, CPU temperature, Fan speed

Yuetsu Kodama; Satoshi Itoh; Toshiyuki Shimizu; Satoshi Sekiguchi; Hiroshi Nakamura; Naohiko Mori

2010-12-01T23:59:59.000Z

465

Imbalance of CPU temperatures in a blade system and its impact for power consumption of fans  

Science Conference Proceedings (OSTI)

We are now developing a new metric of data center power efficiency to fairly evaluate the contribution of each improvement for power efficiency. In order to develop it, we built a testbed of a data center and measured power consumption of each components ... Keywords: CPU temperature, Data center, Fan speed, Power consumption, Power efficiency

Yuetsu Kodama; Satoshi Itoh; Toshiyuki Shimizu; Satoshi Sekiguchi; Hiroshi Nakamura; Naohiko Mori

2013-03-01T23:59:59.000Z

466

Globalization and the Sustainability of Large Current Account Imbalances: Size Matters*  

E-Print Network (OSTI)

current account/GDP of AOCs. Plotted for the case where cu Caccount deficit/GDP of AOCs will double in ten years, from

Aizenman, Joshua; Sun, Yi

2009-01-01T23:59:59.000Z

467

Globalization and the Sustainability of Large Current Account Imbalances: Size Matters  

E-Print Network (OSTI)

account deficit/GDP of AOCs will double in ten years, fromcurrent account/GDP of AOCs. Plotted for the case where cu C

Aizenman, Joshua; Sun, Yi

2008-01-01T23:59:59.000Z

468

Origins and Evolution of Imbalance in Synoptic-Scale Baroclinic Wave Life Cycles  

Science Conference Proceedings (OSTI)

A set of balance equations is derived that is appropriate for analysis of the three-dimensional anelastic system and is based on expansions in Rossby and Froude number similar to those employed in the study of the shallow-water equations by Spall ...

Andrew B. G. Bush; James C. McWilliams; W. Richard Peltier

1995-04-01T23:59:59.000Z

469

Globalization and the Sustainability of Large Current Account Imbalances: Size Matters  

E-Print Network (OSTI)

2008 Globalization and the Sustainability of Large Currentpaper evaluates the sustainability of large current accountby the limited sustainability of the larger current account

Aizenman, Joshua; Sun, Yi

2008-01-01T23:59:59.000Z

470

Globalization and the Sustainability of Large Current Account Imbalances: Size Matters*  

E-Print Network (OSTI)

2009 Globalization and the Sustainability of Large Currentpaper evaluates the sustainability of large current accountby the limited sustainability of the larger current account

Aizenman, Joshua; Sun, Yi

2009-01-01T23:59:59.000Z

471

Scalable Identification of Load Imbalance in Parallel Executions Using Call Path Profiles  

Science Conference Proceedings (OSTI)

Applications must scale well to make efficient use of today's class of petascale computers, which contain hundreds of thousands of processor cores. Inefficiencies that do not even appear in modest-scale executions can become major bottlenecks in large-scale ...

Nathan R. Tallent; Laksono Adhianto; John M. Mellor-Crummey

2010-11-01T23:59:59.000Z

472

Evidence for metabolic imbalance of vitamin A2 in wild fish chronically exposed to metals  

E-Print Network (OSTI)

~ulationsocc:upy microhabitats that usually provide rcm;irkably st;tl,le tenlperatnres in macroenvironments where temperatlires

Bernatchez, Louis

473

On the Apparent “Imbalance” Term in the Turbulent Kinetic Energy Budget  

Science Conference Proceedings (OSTI)

A synthetic dataset is used to show that apparent variations between different stability classes in the mean drag coefficient, CD10n, to wind speed relationship can be explained by random errors in determining the friction velocity u. Where the ...

Peter K. Taylor; Margaret J. Yelland

2000-01-01T23:59:59.000Z

474

Reducing Water Imbalance in Land Data Assimilation: Ensemble Filtering without Perturbed Observations  

Science Conference Proceedings (OSTI)

It is well known that the ensemble Kalman filter (EnKF) requires updating each ensemble member with perturbed observations in order to produce the proper analysis-error covariances. While increased accuracy in a mean square sense may be preferable ...

M. Tugrul Yilmaz; Timothy DelSole; Paul R. Houser

2012-02-01T23:59:59.000Z

475

Handling Class Overlap and Imbalance to Detect Prompt Situations in Smart Homes  

E-Print Network (OSTI)

such as cancerous cell identification [1], oil- spill detection [2], fraud detection [3], keyword extraction [4

Cook, Diane J.

476

Learning Optimal Threshold on Resampling Data to Deal with Class Imbalance  

E-Print Network (OSTI)

, such as credit card fraud detection, intrusion detection, oil-spill detection, disease diagnosis, and many other

Schmidt-Thieme, Lars

477

Out-of-plane negative magnetoresistance of Bi{sub 2}Sr{sub 1.6}La{sub 0.4}CuO{sub 6+{delta}} single crystals in the underdoped region  

Science Conference Proceedings (OSTI)

In order to investigate a relationship between the carrier concentration and negative magnetoresistance in the underdoped region, they have performed out-of-plane electrical resistivity measurements for underdoped Bi{sub 2}Sr{sub 1.6}La{sub 0.4}CuO{sub 6+{delta}} single crystals. Giant negative magnetoresistance has been observed in the most abundant carrier sample with {delta} = 0.12 in the experiment. The negative magnetoresistance reduces with decreasing carrier concentration.

Akazawa, Teruhiko; Ikeda, Hiroshi; Ozawa, Norihiko; Kouno, Hideki; Yoshizaki, Ryozo

1999-12-01T23:59:59.000Z

478

Dynamics of tritrophic interactions between solenopsis invicta, antonina graminis, and neodusmetia sangwani: do fire ants negatively impact the success of a biological control system?  

E-Print Network (OSTI)

Solenopsis invicta, the red imported fire ant, has recently become associated with Antonina graminis, an invasive pest, and Neodusmetia sangwani, biological control agent, and maybe negatively affecting established biological control. A preliminary survey outlined the range of A. graminis and its parasitoids, and found N. sangwani was present at a reduced rate in South Texas and in the southeastern United States. A greenhouse experiment demonstrated that S. invicta decreased the rate of parasitism of A. graminis by N. sangwani, with S. invicta directly interfering with oviposition. Interactions between S. invicta and A. gaminis may be facilitating the spread and establishment of two invasive pests which has a negative impact on established classical biological control of A. graminis by N. sangwani.

Chantos, Jillian Marie

2007-08-01T23:59:59.000Z

479

The role of multiparticle correlations and Cooper pairing in the formation of molecules in an ultracold gas of Fermi atoms with a negative scattering length  

Science Conference Proceedings (OSTI)

The influence of multiparticle correlation effects and Cooper pairing in an ultracold Fermi gas with a negative scattering length on the formation rate of molecules is investigated. Cooper pairing is shown to cause the formation rate of molecules to increase, as distinct from the influence of Bose-Einstein condensation in a Bose gas on this rate. This trend is retained in the entire range of temperatures below the critical one.

Babichenko, V. S., E-mail: vsbabichenko@hotmail.com; Kagan, Yu. [National Research Centre Kurchatov Institute (Russian Federation)

2012-11-15T23:59:59.000Z

480

O-vacancies in transition metal (TM) oxides: Coordination and local site symmetry of transition and negative ion states in TM2O3 and TMO2 oxides  

Science Conference Proceedings (OSTI)

Removal of neutral O-atoms from a transition metal (TM) oxide results in two electrons residing within the vacated site. Two-electron multiplet theory has been used to develop a d^2equivalent model. When applied to tetragonal HfO"2, the two electrons ... Keywords: Negative ion states, O-vacancy, Second derivative O K pre-edge spectra, Tanabe-Sugano diagrams, Transition metal oxides: X-ray absorption spectroscopy

G. Lucovsky; D. Zeller; J. L. Whitten

2011-07-01T23:59:59.000Z

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481

Physics of a magnetic filter for negative ion sources. I. Collisional transport across the filter in an ideal, 1D filter  

Science Conference Proceedings (OSTI)

Magnetic filters are used in negative ion sources for neutral beam injection in fusion devices to reduce the electron temperature in the extraction region in order to limit negative ion destruction by fast electrons. The drop in electron temperature through the filter is due to the enhanced residence time and collisional energy losses of electrons trapped in the magnetic field. The mechanisms controlling particle and energy transport through the magnetic filter in negative ion sources of the ITER type are still not clear and the aim of this paper is to clarify and quantify these mechanisms. A particle-in-cell Monte Carlo simulation is used to revisit and analyze the role and operation of the magnetic filter in an 'ideal' one-dimensional configuration and to study the stability of the one-dimensional solution in a two-dimensional configuration with periodic boundary conditions. The roles of collisions and instabilities on electron transport through the filter are discussed. The influence of a more realistic geometry on electron transport through the filter is analyzed in the companion paper [Boeuf et al., Phys. Plasmas 19, 113510 (2012)].

Boeuf, J. P.; Chaudhury, B.; Garrigues, L. [LAboratoire PLAsma et Conversion d'Energie (LAPLACE), Universite de Toulouse, Bt. 3R2, 118 Route de Narbonne, F-31062 Toulouse Cedex 9 (France)

2012-11-15T23:59:59.000Z

482

Biofuels development in Maine: Using trees to oil the wheels of sustainability -Maine news, sports, obituaries, weather -Bangor Daily News http://bangordailynews.com/2013/03/12/opinion/biofuels-development-in-maine-using-trees-to-oil-the-wheels-of-sustain  

E-Print Network (OSTI)

Biofuels development in Maine: Using trees to oil the wheels of sustainability - Maine news, sports, obituaries, weather - Bangor Daily News http://bangordailynews.com/2013/03/12/opinion/biofuels-development-in-maine-using-trees-to-oil-the-wheels-of-sustainability/print/[3/13/2013 1:54:43 PM] Biofuels development

Thomas, Andrew

483

Copyright 2005 Investor's Business Daily Inc. INVESTOR'S BUSINESS DAILY MONDAY, JUNE 6, 2005 A9  

E-Print Network (OSTI)

Zucker the flexibility to work whenever she wants, a plus that appeals to many home-based entrepreneurs's no of- ficerentorutilitybilltopay,soreve- nue can be used to keep expanding the business. A home-based- allyatadinerortheclient'soffice. Zbar pointed out another option for the home-based entrepreneur whosehousecan

Kuzmanovic, Aleksandar

484

Physics of a magnetic filter for negative ion sources. II. E Multiplication-Sign B drift through the filter in a real geometry  

Science Conference Proceedings (OSTI)

The physics of a magnetic filter under conditions similar to those of the negative ion source for the ITER neutral beam injector is analyzed with the help of a two-dimensional particle-in-cell Monte Carlo Collisions model. A detailed analysis of the different terms of the electron momentum equations shows how diamagnetic and drift currents can be dominant in different regions of the filter. Electron transport through the filter is due to an E Multiplication-Sign B drift current on one side of the chamber induced by the presence of the chamber walls perpendicular to the electron diamagnetic current. The filter design of the ITER negative ion source, which does not allow a closed electron diamagnetic current, induces an asymmetry of the plasma that is analyzed with the particle model. It is shown that electron transport through the filter in this geometry is very different from the transport in an ideal, one-dimensional magnetic filter often considered in the literature and described in detail in the companion paper [Boeuf et al., Phys. Plasmas 19, 113509 (2012)].

Boeuf, J. P.; Claustre, J.; Chaudhury, B.; Fubiani, G. [LAboratoire PLAsma et Conversion d'Energie (LAPLACE), Universite de Toulouse, Bt. 3R2, 118 Route de Narbonne, F-31062 Toulouse Cedex 9 (France)

2012-11-15T23:59:59.000Z

485

Generation of negative ions in the gas phase from a 12CaO{center_dot}7Al{sub 2}O{sub 3} membrane-coated ceramic heater under atmospheric pressure  

Science Conference Proceedings (OSTI)

12CaO{center_dot}7Al{sub 2}O{sub 3} (C12A7) crystal is able to generate strong and high purity oxygen anion (O{sup -}) beam under reduced pressure. However, the emission of O{sup -} or related species under atmospheric pressure has not been evaluated. In this study, the characteristics of negative ion species emissions from the C12A7 membrane-coated ceramic heater under atmospheric pressure were investigated by quadrupole mass spectrometer. Negative ion species were confirmed to be emitted even under atmospheric pressure. It was supposed that the detected negative ion clusters, such as O{sup -}(H{sub 2}O){sub n}, O{sub 2}{sup -}(H{sub 2}O){sub n}, and CO{sub 4}{sup -}(H{sub 2}O){sub n}, were generated by the reaction of negative ions emitted from the heater with impurities in He gas.

Yamamoto, Mitsuo [College of Arts and Sciences, University of Tokyo, Tokyo 153-8902 (Japan); Shima, Akio [Department of Chemical System Engineering, University of Tokyo, Tokyo 113-8656 (Japan); Nishioka, Masateru [Research Center for Compact Chemical Process, National Institute of Advanced Industrial Science and Technology (AIST), Miyagi 983-8551 (Japan); Sadakata, Masayoshi [Department of Environmental Chemical Engineering, Kogakuin University, Tokyo 192-0015 (Japan)

2008-12-15T23:59:59.000Z

486

Observation of Negative Ion Resonances in Amorphous Ice via Low-Energy (5{endash}40 eV) Electron-Stimulated Production of Molecular Hydrogen  

DOE Green Energy (OSTI)

The {ital D}{sub 2}({sup 1}{Sigma}{sup +}{sub {ital g}}, {ital v}=0{endash}2, {ital J}=0{endash}2) desorbates produced during low-energy (5{endash}40 eV) electron-beam irradiation of amorphous D{sub 2}O ice were monitored using resonance-enhanced laser ionization spectroscopy. We attribute the structure in the D{sub 2} yield as a function of the incident electron energy to core-excited negative ion resonances. These resonances, or the excited states produced after electron autodetachment, decay via molecular elimination to yield {ital D}{sub 2}({sup 1}{Sigma}{sup +}{sub {ital g}}) directly. D{sub 2} is observed with {ital v}=0 or 2 but not {ital v}=1, suggesting a symmetry propensity in the excitation or decay of the resonances. {copyright} {ital 1996 The American Physical Society.}

Kimmel, G.A.; Orlando, T.M. [Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352 (United States)] [Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352 (United States)

1996-11-01T23:59:59.000Z

487

Single-Crystal Intermetallic M-Sn (M ) Fe, Cu, Co, Ni) Nanospheres as Negative Electrodes for Lithium-Ion Batteries  

DOE Green Energy (OSTI)

FeSn{sub 2}, Cu{sub 6}Sn{sub 5}, CoSn{sub 3}, and Ni{sub 3}Sn{sub 4} single-crystalline nanospheres with a characteristic uniform particle size of 40 nm have been synthesized via a modified polyol process, aiming at determining and understanding their intrinsic cycling performance as negative electrode materials for lithium-ion batteries. We find that, in this morphologically controlled condition, the reversible capacities follow FeSn{sub 2} > Cu{sub 6}Sn{sub 5} {approx} CoSn{sub 3} > Ni{sub 3}Sn{sub 4}, which is not directly decided by their theoretical capacities or lithium-driven volume changes. FeSn{sub 2} exhibits the best electrochemical activity among these intermetallic nanospheres and an effective solid electrolyte interface, which explains its superior cycling performance. The small particle dimension also improves cycling stability and Li{sup +} diffusion.

Wang, X.; Han, W; Chen, J; Graetz, J

2010-01-01T23:59:59.000Z

488

Judgment after Death (Negative Confession)  

E-Print Network (OSTI)

Kunstverlag. Stadler, Martin 2001 War eine dramatischeMartin A. Stadler EDITORS Editor-in-Chief University ofFull Citation: Stadler, Martin A. , 2008, Judgment after

Stadler, Martin

2008-01-01T23:59:59.000Z

489

On Negative Eventualities, Negative Concord, and Negative Yes/No Questions  

E-Print Network (OSTI)

in Azerbejd#anie,. . . Azerbaijan,. . . `Yeltsin's stumbling, which took place in Azerbaijan,. . . ' (35

Przepiórkowski, Adam

490

Negative heat-capacity at phase-separations in microcanonical thermostatistics of macroscopic systems with either short or long-range interactions  

E-Print Network (OSTI)

Conventional thermo-statistics address infinite homogeneous systems within the canonical ensemble. However, some 170 years ago the original motivation of thermodynamics was the description of steam engines, i.e. boiling water. Its essential physics is the separation of the gas phase from the liquid. Of course, boiling water is inhomogeneous and as such cannot be treated by conventional thermo-statistics. Then it is not astonishing, that a phase transition of first order is signaled canonically by a Yang-Lee singularity. Thus it is only treated correctly by microcanonical Boltzmann-Planck statistics. This was elaborated in the talk presented at this conference. It turns out that the Boltzmann-Planck statistics is much richer and gives fundamental insight into statistical mechanics and especially into entropy. This can be done to a far extend rigorously and analytically. The deep and essential difference between ``extensive'' and ``intensive'' control parameters, i.e. microcanonical and canonical statistics, was exemplified by rotating, self-gravitating systems. In the present paper the necessary appearance of a convex entropy $S(E)$ and the negative heat capacity at phase separation in small as well macroscopic systems independently of the range of the force is pointed out.

D. H. E. Gross

2005-09-09T23:59:59.000Z

491

X-ray photoelectron spectroscopy of negative electrodes from high-power lithium-ion cells showing various levels of power fade  

DOE Green Energy (OSTI)

High-power lithium-ion cells for transportation applications are being developed and studied at Argonne National Laboratory. The current generation of cells containing LiNi{sub 0.8}Co{sub 0.15}Al{sub 0.05}O{sub 2}-based cathodes, graphite-based anodes, and LiPF6-based electrolytes show loss of capacity and power during accelerated testing at elevated temperatures. Negative electrode samples harvested from some cells that showed varying degrees of power and capacity fade were examined by X-ray photoelectron spectroscopy (XPS). The samples exhibited a surface film on the graphite, which was thicker on samples from cells that showed higher fade. Furthermore, solvent-based compounds were dominant on samples from low power fade cells, whereas LiPF{sub 6}-based products were dominant on samples from high power fade cells. The effect of sample rinsing and air exposure is discussed. Mechanisms are proposed to explain the formation of compounds suggested by the XPS data.

Herstedt, Marie; Abraham, Daniel P.; Kerr, John B.

2004-02-28T23:59:59.000Z

492

On conditions of negativity of friction resistance for non-stationary modes of blood flow and possible mechanism of affecting of environmental factors on energy effectiveness of cardio-vascular system functioning  

E-Print Network (OSTI)

It is shown that initiated by action of molecular viscosity impulse flow, directed usually from the moving fluid to limiting it solid surface, can, under certain conditions, turn to zero and get negative values in the case of non-stationary flow caused by alternating in time longitudinal (along the pipe axis) pressure gradient. It is noted that this non-equilibrium mechanism of negative friction resistance in the similar case of pulsating blood flow in the blood vessels, in addition to the stable to turbulent disturbances swirled blood flow structure providing, can also constitute hydro-mechanical basis of the observed but not explained yet paradoxically high energy effectiveness of the normal functioning of the cardio-vascular system (CVS). We consider respective mechanism of affecting on the stability of the normal work of CVS by environmental variable factors using shifting of hydro-dynamic mode with negative resistance realization range boundaries and variation of linear hydro-dynamic instability leading ...

Chefranov, S G

2013-01-01T23:59:59.000Z