Sample records for declared force majeure

  1. W.A.Mozart : Quatuor cordes en La majeur, K 464 en 4 mouvements : Allegro -Menuetto -Andante -Allegro non troppo

    E-Print Network [OSTI]

    Mazliak, Laurent

    W.A.Mozart : Quatuor à cordes en La majeur, K 464 en 4 mouvements : Allegro - Menuetto - Andante - Allegro non troppo La majeur...Tonalité des architectures de cathédrale chez Mozart : on pense aux grandes

  2. W.A.MOZART: Quintette K581 pour clarinette et cordes en la majeur, en quatre mouvements. Allegro -Larghetto -Menuet -Finale (Allegretto)

    E-Print Network [OSTI]

    Mazliak, Laurent

    W.A.MOZART: Quintette K581 pour clarinette et cordes en la majeur, en quatre mouvements. Allegro majeur, un pensif Adagio apporte une touche de gravité tendre et charmeuse, avant un Allegro débordant d

  3. L.van BEETHOVEN : Quatuor n10 en Mi bmol majeur, Op.74 Poco Adagio -Allegro -

    E-Print Network [OSTI]

    Mazliak, Laurent

    L.van BEETHOVEN : Quatuor n°10 en Mi bémol majeur, Op.74 Poco Adagio - Allegro - Adagio ma non con variazioni- Allegro Après le coup de tonnerre que représentait l'achèvement des trois quatuors à apportent une tension qui se fond dans un grand crescendo menant à l'Allegro. Trois accords joyeux pour un

  4. L.van BEETHOVEN : Quatuor n9 en Ut majeur, Op.59, n3 Andante con moto -Allegro vivace -

    E-Print Network [OSTI]

    Mazliak, Laurent

    L.van BEETHOVEN : Quatuor n°9 en Ut majeur, Op.59, n°3 Andante con moto - Allegro vivace - Andante con moto quasi allegretto - Menuetto - Allegro molto Ce quatuor, troisième de la série dédiée au comte

  5. J.HAYDN: Quatuor Op 33 n4 en Si bmol majeur, en quatre mouvements. Allegro moderato -Largo -Menuetto -Allegro .

    E-Print Network [OSTI]

    Mazliak, Laurent

    J.HAYDN: Quatuor Op 33 n°4 en Si bémol majeur, en quatre mouvements. Allegro moderato - Largo - Menuetto - Allegro . Fallait-il que l'Opus 33 de Haydn soit révolutionnaire pour que Mozart à sa lecture se

  6. Declarative Problem Solving through Abduction

    E-Print Network [OSTI]

    Moraitis, Pavlos

    1 Declarative Problem Solving through Abduction Antonis C. Kakas Department of Computer Science PROBLEM SOLVING through Logical Representations (or models) of problems and the use of ABDUCTIVE REASONING · Acquire expertise in Declarative Problem Solving using the representation framework of ABDUCTIVE LOGIC

  7. Declaration of Concentration in Nanotechnology

    E-Print Network [OSTI]

    Goldberg, Bennett

    Declaration of Concentration in Nanotechnology Return completed form to ENG Undergraduate Records:____________________________ Instructions: ENG students declaring a Concentration in Nanotechnology should complete this form, obtain REQUIRED COURSES (Choose 1) 1. ENG EC 481­ Fundamentals of Nanomaterials and Nanotechnology 4.0 ELECTIVES

  8. W.A.MOZART: Quatuor K 465 en ut majeur, Les dissonances . Adagio -Allegro -Andante cantabile -Menuetto: Allegro -Allegro Molto.

    E-Print Network [OSTI]

    Mazliak, Laurent

    W.A.MOZART: Quatuor K 465 en ut majeur, « Les dissonances ». Adagio -Allegro -Andante cantabile - Menuetto: Allegro - Allegro Molto. Le cycle de six quatuors écrits par Mozart en 1783-1785 qu'il dédia à magnifiquement l'Allegro qui suit dont il fait immédiatement ressortir la joie, éclatante dans le thème du

  9. J.HAYDN: Quatuor Op 76 n3 "L'Empereur" en ut majeur, en quatre mouvements. Allegro -Poco adagio cantabile -Menuet -Presto

    E-Print Network [OSTI]

    Mazliak, Laurent

    J.HAYDN: Quatuor Op 76 n°3 "L'Empereur" en ut majeur, en quatre mouvements. Allegro - Poco adagio toutes les recettes découvertes dans la genèse de ses symphonies. L'allegro initial annonce tout de suite

  10. A. DVORAK : Quintette pour piano et cordes en la majeur, op.81 Allegro ma non troppo -Andante con moto -Molto vivace -Allegro

    E-Print Network [OSTI]

    Mazliak, Laurent

    A. DVORAK : Quintette pour piano et cordes en la majeur, op.81 Allegro ma non troppo - Andante con moto - Molto vivace - Allegro En juillet 1887, Dvorak reprend l'ancienne partition d'un quintette pour

  11. Declarative Problem Solving through Abduction

    E-Print Network [OSTI]

    Moraitis, Pavlos

    1 Declarative Problem Solving through Abduction Antonis C. Kakas Department of Computer Science, 2007 Paris, France #12;2 Course Breakdown · Introduction · Abduction ­ General Introduction · Modelling Problems for Abduction and DPS · Computational Logic & PROLOG ­ Background · Abductive Logic Programming

  12. AFFIDAVIT OF TERMINATION OF DOMESTIC PARTNERSHIP Declaration

    E-Print Network [OSTI]

    Ohta, Shigemi

    AFFIDAVIT OF TERMINATION OF DOMESTIC PARTNERSHIP Declaration I of Termination of Domestic Partnership form to my former Domestic Partner on ____________________, 20 or misleading statement made will subject me to disciplinary action up to and including termination

  13. Proton++: A Customizable Declarative Multitouch Framework

    E-Print Network [OSTI]

    California at Irvine, University of

    Proton++: A Customizable Declarative Multitouch Framework Kenrick Kin1,2 Bj¨orn Hartmann1 Tony DeRose2 Maneesh Agrawala1 1 University of California, Berkeley 2 Pixar Animation Studios ABSTRACT Proton- sions of touch event symbols. It builds on the Proton frame- work by allowing developers to incorporate

  14. Water volume okay; early runoff leads to dry year declaration

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Water-volume-okay-early-runoff-leads-to-dry-year-declaration Sign In About | Careers | Contact | Investors | bpa.gov Search News & Us Expand News & Us Projects & Initiatives...

  15. Junior Year Checklist Make sure you have declared a major!!!

    E-Print Network [OSTI]

    Suzuki, Masatsugu

    your major is declared. Check your DARS · Make sure everything is up-to-date. You don't want to catch

  16. Declarative Network Monitoring with an Underprovisioned Query Processor Frederick Reiss

    E-Print Network [OSTI]

    California at Irvine, University of

    interest in bringing the power of declarative queries to passive network monitors [8, 15]. Declar- ative network monitoring setup. real-time data on the status of their networks, network moni- tors need, or parallel hardware [29]. Other systems construct queries by connecting blocks of highly-optimized special

  17. XClean in Action A Demonstration of Declarative XML Data Cleaning

    E-Print Network [OSTI]

    Weske, Mathias

    incremental development, maintenance and evolution of the cleaning process. Declarativity. By declaratively delegating the storage and optimization issues to the underlying data management systems. DBMS-backed data database management systems (DBMSs). Therefore, cleaning data on top of a DBMS allows taking advantage

  18. Declarative & Procedural Goals in Intelligent Agent Systems Michael Winikoff

    E-Print Network [OSTI]

    Padgham, Lin

    Science and Information Technology RMIT University Melbourne, Australia. winikoff@cs.rmit.edu.au LinDeclarative & Procedural Goals in Intelligent Agent Systems Michael Winikoff School of Computer is that of goals (Winikoff et al., 2001). Goals have two aspects: declarative, where a goal is a description

  19. accident declaration form: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    accident declaration form First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 DECLARATION FORM Page 1 of 2...

  20. Declaring Economics as a Minor To be eligible to declare a minor in economics a student must

    E-Print Network [OSTI]

    Suzuki, Masatsugu

    . Complete and SIGN the "Declaration of Major/Minor Form". 2. Print and attach a copy of a "What if" DARS. Bring the "Declaration of Major/Minor Form" and the "What If" DARS to the Economics Department (use will need to substitute additional economics electives and obtain DARS exceptions. NOTE: Some economics

  1. CONTENT KNOWLEDGE (Declarative Knowledge; Technical Skills): Students will demonstrate use of critical methods together with mastery of pertinent declarative

    E-Print Network [OSTI]

    Fernandez, Eduardo

    CONTENT KNOWLEDGE (Declarative Knowledge; Technical Skills): Students will demonstrate use effective communication skills by writing thesisdriven essays in response to a specific prompt. Essays are expected to exhibit the control of rhetorical elements that include clarity, coherence, comprehensiveness

  2. Climate forcing Climate forcing

    E-Print Network [OSTI]

    MacKinnon, Jennifer

    parameters (solar distance factors) solar luminosity moon orbit volcanoes and other geothermal sources,000 years (large panels) and since 1750 (inset panels). Measurements are shown from ice cores (symbols forcings are shown on the right hand axes of the large panels. {Figure 6.4} !"#$#%&'(!&#)$&*$+#$,-.$/0

  3. A Debugging Scheme for Declarative Equation Based Modeling Languages

    E-Print Network [OSTI]

    Zhao, Yuxiao

    examine the particular debugging problems posed by Modelica, a declarative equation based modeling language. A brief overview of the Modelica language is also given. We also present our view of the issues, bipartite graphs, graph decomposition techniques, static analysis, debug- ging, Modelica. 1 Introduction

  4. A Debugging Scheme for Declarative Equation Based Modeling Languages

    E-Print Network [OSTI]

    Burns, Peter

    examine the particular debugging problems posed by Modelica, a declarative equation based modeling language. A brief overview of the Modelica language is also given. We also present our view of the issues, bipartite graphs, graph decomposition techniques, static analysis, debug- ging, Modelica 1 Introduction

  5. Declaration of Intent Certificate in Engineering for Energy Sustainability

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    Declaration of Intent Certificate in Engineering for Energy Sustainability College of Engineering that I meet all requirements to apply for the Certificate in Engineering for Energy Sustainability. I am:________________________ #12;Tentative Study Plan Certificate in Engineering for Energy Sustainability College of Engineering

  6. Declaration of Intent Certificate in Engineering for Energy Sustainability

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    Declaration of Intent Certificate in Engineering for Energy Sustainability College of Engineering for Energy Sustainability. I am a degree-seeking undergraduate student with at least a 2.5 GPA. I have met:________________________ #12;Tentative Study Plan Certificate in Engineering for Energy Sustainability College of Engineering

  7. A Declarative Semantics for CLP with Qualification and Proximity

    E-Print Network [OSTI]

    Rodríguez-Artalejo, Mario; 10.1017/S1471068410000323

    2010-01-01T23:59:59.000Z

    Uncertainty in Logic Programming has been investigated during the last decades, dealing with various extensions of the classical LP paradigm and different applications. Existing proposals rely on different approaches, such as clause annotations based on uncertain truth values, qualification values as a generalization of uncertain truth values, and unification based on proximity relations. On the other hand, the CLP scheme has established itself as a powerful extension of LP that supports efficient computation over specialized domains while keeping a clean declarative semantics. In this paper we propose a new scheme SQCLP designed as an extension of CLP that supports qualification values and proximity relations. We show that several previous proposals can be viewed as particular cases of the new scheme, obtained by partial instantiation. We present a declarative semantics for SQCLP that is based on observables, providing fixpoint and proof-theoretical characterizations of least program models as well as an imp...

  8. Declaring/Pre-Declaring Economics as a Major Students who want to major in economics are urged to complete the required courses for the

    E-Print Network [OSTI]

    Suzuki, Masatsugu

    " DARS, selecting: "UG Harpur" for the school "Interest in Economics" for the major (near the bottom of the list). Do NOT select "BA in Economics"! 3. Bring the "Declaration of Major Form" and the "What If" DARS

  9. A Note on Declarative Programming Paradigms and the Future of Definitional Programming

    E-Print Network [OSTI]

    Torgersson, Olof

    declarative programming languages stem from work in artificial intelligence and automated theorem proving is that programming is lifted to a higher level of abstraction. At this higher level of abstrac- tion the programmer of an algorithm and that all control information is supplied automatically by the system. Declarative programming

  10. Protective Force

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2005-08-26T23:59:59.000Z

    Establishes requirements for management and operation of the DOE Protective Force (PF), establishes requirements for firearms operations and defines the firearms courses of fire. Cancels: DOE M 473.2-1A DOE M 473.2-2

  11. Protective Force

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2006-03-07T23:59:59.000Z

    The manual establishes requirements for management and operation of the DOE Protective Force, establishes requirements for firearms operations and defines the firearms courses of fire. Chg 1 dated 3/7/06. DOE M 470.4-3A cancels DOE M 470.4-3, Chg 1, Protective Force, dated 3-7-06, Attachment 2, Contractor Requirement Document (CRD) only (except for Section C). Chg 1, dated 3-7-06, cancels DOE M 470.4-3

  12. Casimir forces

    E-Print Network [OSTI]

    S. Reynaud; A. Lambrecht

    2014-10-10T23:59:59.000Z

    The present notes are organized as the lectures given at the Les Houches Summer School "Quantum Optics and Nanophotonics" in August 2013. The first section contains an introduction and a description of the current state-of-the-art for Casimir force measurements and their comparison with theory. The second and third sections are a pedagogical presentation of the main features of the theory of Casimir forces for 1-dimensional model systems and for mirrors in 3-dimensional space.

  13. Spanish Major Requirements Option A: Language and Hispanic Studies (for students declared prior to Fall 2013)

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    Spanish Major Requirements Option A: Language and Hispanic Studies (for students declared prior (12 credits) 311: Introduction to Advanced Language Practice 320: Spanish Phonetics _____ 3 additional course (322: Early Hispanic, 324: Modern Spanish, 326: Spanish American) Spanish 322 is recommended

  14. Declarative Goals in Reactive Plans \\Lambda Michael Beetz and Drew McDermott

    E-Print Network [OSTI]

    McDermott, Drew V.

    Declarative Goals in Reactive Plans \\Lambda Michael Beetz and Drew McDermott Yale University, Department of Computer Science P.O. Box 2158, Yale Station New Haven, CT 06520 beetz@cs.yale.edu, mcdermott

  15. Lift Forces

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645U.S. DOEThe Bonneville PowerCherries 82981-1cnHigh SchoolIn12electron 9 5Let us count theLienertLift Forces in Bubbly

  16. Gas Source Declaration with a Mobile Robot Achim Lilienthal, Holger Ulmer, Holger Frohlich, Andreas Stutzle, Felix Werner, Andreas Zell

    E-Print Network [OSTI]

    Zell, Andreas

    Gas Source Declaration with a Mobile Robot Achim Lilienthal, Holger Ulmer, Holger Fr¨ubingen, Germany Abstract-- As a sub-task of the general gas source localisation problem, gas source declaration character of gas transport in a natural indoor environment, it is not sufficient to search for instantaneous

  17. Declarative Integration of Interactive 3D Graphics into the World-Wide Web: Principles, Current Approaches, and Research Agenda

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Declarative Integration of Interactive 3D Graphics into the World-Wide Web: Principles, Current With the advent of WebGL, plugin-free hardware-accelerated inter- active 3D graphics has finally arrived in all of incor- porating 3D graphics directly into HTML to enable its use on any Web page. We present declarative

  18. Declarative Semantics for Revision Programming and Connections to Active Integrity Constraints

    E-Print Network [OSTI]

    Truszczynski, Miroslaw

    was later generalized to the case of disjunctive revision programs in [5]. In this paper, for consistencyDeclarative Semantics for Revision Programming and Connections to Active Integrity Constraints@cs.uky.edu Abstract. We investigate revision programming, a formalism to describe con- straints on belief sets

  19. NVLAP Assessor Training Syllabus Self-Declaration of Review of Training Topics

    E-Print Network [OSTI]

    NVLAP Assessor Training Syllabus Self-Declaration of Review of Training Topics Instructions: This syllabus provides the general topics required for training Lead Assessors and Technical Assessors, along with links to the respective training resources.* Please contact the Program Manager for any program

  20. A quantitative investigation of the imperative-and-declarative construction in English

    E-Print Network [OSTI]

    Scontras, Gregory

    The imperative-and-declarative (IaD) construction in English (e.g. Study hard and you will pass the class) has two distinct readings: one that has the semantics of a conditional and additionally the meaning of an imperative, ...

  1. Semantics Guided Filtering of Combinatorial Graph Transformations in Declarative Equation-Based Languages.

    E-Print Network [OSTI]

    Burns, Peter

    required to get the simulation working. The paper is organized as follows: Section 2 introduces Modelica, a new equation-based declarative language. Some specific Modelica language constructs necessary using Modelica. Section 5 gives some preliminary definitions related to the concept of bipartite graphs

  2. Barcelona: A design & runtime environment for declarative artifact-centric BPM

    E-Print Network [OSTI]

    California at Santa Barbara, University of

    -sourced [2] ArtiFact system supports both design-time and run-time environments for GSM. BothBarcelona: A design & runtime environment for declarative artifact-centric BPM Fenno (Terry) Heath changes as they move through those operations. A business artifact type is modeled using (a

  3. Spanish Major Requirements Option B: Literature and Hispanic Studies (for students declared prior to Fall 2013)

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    Spanish Major Requirements Option B: Literature and Hispanic Studies (for students declared prior: Introduction to Hispanic Cultures 224: Introduction to Hispanic Literatures Literature (12 credits) Spanish 322: Survey of Early Hispanic Literature _____ another 300-level literature survey (324: Modern Spanish, 326

  4. Behavioral/Systems/Cognitive A Shared Resource between Declarative Memory and Motor

    E-Print Network [OSTI]

    Shadmehr, Reza

    Behavioral/Systems/Cognitive A Shared Resource between Declarative Memory and Motor Memory Aysha, Baltimore, Maryland 21205 The neural systems that support motor adaptation in humans are thought be contrasted to a slow adaptive process that also supports motor memory, but learns gradually and shows

  5. Integrating UF6 Cylinder RF Tracking With Continuous Load Cell Monitoring for Verifying Declared UF6 Feed and Withdrawal Operations Verifying Declared UF6 Feed and Withdrawal Operations

    SciTech Connect (OSTI)

    Krichinsky, Alan M [ORNL; Miller, Paul [ORNL; Pickett, Chris A [ORNL; Richardson, Dave [ORNL; Rowe, Nathan C [ORNL; Whitaker, J Michael [ORNL; Younkin, James R [ORNL

    2009-01-01T23:59:59.000Z

    Oak Ridge National Laboratory is demonstrating the integration of UF6 cylinder tracking, using RF technology, with continuous load cell monitoring (CLCM) at mock UF6 feed and withdrawal (F&W) stations. CLCM and cylinder tracking are two of several continuous-monitoring technologies that show promise in providing integrated safeguards of F&W operations at enrichment plants. Integrating different monitoring technologies allows advanced, automated event processing to screen innocuous events thereby minimizing false alerts to independent inspectors. Traditionally, international inspectors rely on batch verification of material inputs and outputs derived from operator declarations and periodic on-site inspections at uranium enrichment plants or other nuclear processing facilities. Continuously monitoring F&W activities between inspections while providing filtered alerts of significant operational events will substantially increase the amount of valuable information available to inspectors thereby promising to enhance the effectiveness of safeguards and to improve efficiency in conducting on-site inspections especially at large plants for ensuring that all operations are declared.

  6. How to Obtain Your DARS to Declare the BA Economics Major Once you've logged into the BU Brain and entered your B#, you will need to do the following

    E-Print Network [OSTI]

    Suzuki, Masatsugu

    How to Obtain Your DARS to Declare the BA Economics Major Once you've logged into the BU Brain DARS" The following screen prints will show you how to run the pre-declaration DARS for Economics the "Economics Pre-Declaration" DARS appears. Click "Economics Pre-Declaration" to open. Print the entire

  7. Three-Nucleon Forces

    E-Print Network [OSTI]

    Peter U. Sauer

    2014-07-25T23:59:59.000Z

    The role of three-nucleon forces in ab initio calculations of nuclear systems is investigated. The difference between genuine and induced many-nucleon forces is emphasized. Induced forces arise in the process of solving the nuclear many-body problem as technical intermediaries towards calculationally converged results. Genuine forces make up the Hamiltonian; they represent the chosen underlying dynamics. The hierarchy of contributions arising from two-, three- and many-nucleon forces is discussed. Signals for the need of the inclusion of genuine three-nucleon forces are studied in nuclear systems, technically best under control, especially in three-nucleon and four-nucleon systems. Genuine three-nucleon forces are important for details in the decription of some observables. Their contributions to observables are small on the scale set by two-nucleon forces.

  8. Protective Force Program Manual

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2000-06-30T23:59:59.000Z

    Provides detailed requirements to supplement DOE O 473.2, Protective Force Program, which establishes the requirements and responsibilities for management and operation of the Department of Energy (DOE) Protective Force (PF) Program. Does not cancel other directives.

  9. IAEA Inspections for Undeclared and Declared Activities: Is a More Robust Approach Needed?

    SciTech Connect (OSTI)

    Mark Schanfein

    2009-07-01T23:59:59.000Z

    The United States has long supported a strong international safeguards system and for many years has served as the foremost supplier of technology, equipment, and training to the International Atomic Energy Agency (IAEA). In doing so, it drew in many instances on DOE sponsored R&D and training that was directed towards domestic safeguards and then adapted for IAEA purposes. This was relatively straightforward because of the strong overlap between the development of nuclear material accountancy measures needed for both domestic and international purposes. Two factors have emerged that have made this strong reliance on domestic measures less and less able to be a source of support for the IAEA. One is the shift by the IAEA safeguards system towards detecting undeclared activities. The second is the shift of domestic attention away from nuclear material accountancy and towards physical protection. As a result, a gap in US sponsored R&D and training relevant to international safeguards has developed. The NNSA Next Generation Safeguards Initiative and the DOE NA-22 Safeguards R&D program are intended to help fill this gap and, thereby, permit the U.S. to remain as the pre-eminent supplier of technology for international safeguards purposes. In this context, IAEA challenges have been examined from the perspective of detecting the diversion of nuclear material from declared stocks; detecting undeclared production of nuclear material and activities at locations declared under INFCIRC/153; and detecting undeclared nuclear material and activities elsewhere in a state. Of these, the detection of undeclared nuclear material and activities is, perhaps, the IAEA’s most significant challenge. It is a challenge that even the international community finds difficult to meet because of the scope and the geographic scale of the problem, the technical constraints, the knowledge required, and the significant resources needed to deploy effective systems world-wide (e.g., satellite surveillance systems). The IAEA’s success in carrying out this mission hinges on its capability to evaluate the declarations made by the state for completeness, correctness, and consistency in order to detect possible indications of undeclared nuclear material and activities. Three elements go into this evaluation: (1) evaluating the internal consistency of a State’s declaration and comparing it to information gathered by IAEA inspectors on the basis of their access to the locations, facilities, sites, personnel, and documents disclosed in the state’s declarations; (2) comparison of States’ declarations with other information available to the IAEA, including the information it gathers from its review of open sources, including scientific and technical literature and data bases, trade journals, and media reports; and (3) its ability to archive, retrieve, organize, and analyze all available information for indications of potential undeclared nuclear material and activities, and, when warranted, to request states to provide further information and access in order to investigate and clarify any questions or inconsistencies.

  10. Declarative Systems

    E-Print Network [OSTI]

    Condie, Tyson

    2011-01-01T23:59:59.000Z

    style extensions such as primary keys and aggregation, andthe specification of a primary key for each relation. Anyan existing tuple on the primary key is intended to replace

  11. Declarative Systems

    E-Print Network [OSTI]

    Condie, Tyson

    2011-01-01T23:59:59.000Z

    body. */ d2 r e w r i t e (@A, Pid , Rid , PredID , f i d gPos ) :? r e w r i t e (@A, Pid , Rid , . . . ) , s y s : :ms1 magicPred (@A, Pid , Name, S i g ) :? magic : :

  12. NUCLEAR PROXIMITY FORCES

    E-Print Network [OSTI]

    Randrup, J.

    2011-01-01T23:59:59.000Z

    One might summarize of nuclear potential energy has beendegree of freedom) for the nuclear interaction between anyUniversity of California. Nuclear Proximity Forces 'I< at

  13. Forces from Connes' geometry

    E-Print Network [OSTI]

    Thomas Schucker

    2007-03-26T23:59:59.000Z

    We try to give a pedagogical introduction to Connes' derivation of the standard model of electro-magnetic, weak and strong forces from gravity.

  14. Protective Force Program Manual

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2001-12-20T23:59:59.000Z

    Provides detailed requirements to supplement DOE O 473.2, PROTECTIVE FORCE PROGRAM, which establishes the requirements and responsibilities for management and operation of the Department of Energy (DOE) Protective Force (PF) Program. Change 1 revised pages in Chapters IV and VI on 12/20/2001.

  15. Declarative message addressing A messaging system, and method of operation thereof, which supports combinations of directory and

    E-Print Network [OSTI]

    Lee, Dongwon

    Declarative message addressing Abstract A messaging system, and method of operation thereof, which supports combinations of directory and mailing list addressing mechanisms. Intended message recipients. The messaging system includes a messaging server and an address resolution module. The messaging server receives

  16. OOTW Force Design Tools

    SciTech Connect (OSTI)

    Bell, R.E.; Hartley, D.S.III; Packard, S.L.

    1999-05-01T23:59:59.000Z

    This report documents refined requirements for tools to aid the process of force design in Operations Other Than War (OOTWs). It recommends actions for the creation of one tool and work on other tools relating to mission planning. It also identifies the governmental agencies and commands with interests in each tool, from whom should come the user advisory groups overseeing the respective tool development activities. The understanding of OOTWs and their analytical support requirements has matured to the point where action can be taken in three areas: force design, collaborative analysis, and impact analysis. While the nature of the action and the length of time before complete results can be expected depends on the area, in each case the action should begin immediately. Force design for OOTWs is not a technically difficult process. Like force design for combat operations, it is a process of matching the capabilities of forces against the specified and implied tasks of the operation, considering the constraints of logistics, transport and force availabilities. However, there is a critical difference that restricts the usefulness of combat force design tools for OOTWs: the combat tools are built to infer non-combat capability requirements from combat capability requirements and cannot reverse the direction of the inference, as is required for OOTWs. Recently, OOTWs have played a larger role in force assessment, system effectiveness and tradeoff analysis, and concept and doctrine development and analysis. In the first Quadrennial Defense Review (QDR), each of the Services created its own OOTW force design tool. Unfortunately, the tools address different parts of the problem and do not coordinate the use of competing capabilities. These tools satisfied the immediate requirements of the QDR, but do not provide a long-term cost-effective solution.

  17. Weak nuclear forces cause the strong nuclear force

    E-Print Network [OSTI]

    E. L. Koschmieder

    2007-12-11T23:59:59.000Z

    We determine the strength of the weak nuclear force which holds the lattices of the elementary particles together. We also determine the strength of the strong nuclear force which emanates from the sides of the nuclear lattices. The strong force is the sum of the unsaturated weak forces at the surface of the nuclear lattices. The strong force is then about ten to the power of 6 times stronger than the weak force between two lattice points.

  18. Federal Protective Force

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2009-07-15T23:59:59.000Z

    This Manual establishes requirements for the management and operation of the Department of Energy (DOE) Federal protective forces (FPFs). Cancels DOE M 470.4-3, Chg 1. Canceled by DOE O 473.3.

  19. Protective Force Program

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1995-02-13T23:59:59.000Z

    To prescribe Department of Energy policy, responsibilities, and requirements for the management and operation of the Protective Force Program. Chg 1 dated 2-13-95. Cancels DOE O 5632.7 and DOE O 5632.8.

  20. Strategic forces briefing

    SciTech Connect (OSTI)

    Bing, G.; Chrzanowski, P.; May, M.; Nordyke, M.

    1989-04-06T23:59:59.000Z

    The Strategic Forces Briefing'' is our attempt, accomplished over the past several months, to outline and highlight the more significant strategic force issues that must be addressed in the near future. Some issues are recurrent: the need for an effective modernized Triad and a constant concern for force survivability. Some issues derive from arms control: the Strategic Arms Reduction Talks (SALT) are sufficiently advanced to set broad numerical limits on forces, but not so constraining as to preclude choices among weapon systems and deployment modes. Finally, a new administration faced with serious budgetary problems must strive for the most effective strategic forces limited dollars can buy and support. A review of strategic forces logically begins with consideration of the missions the forces are charged with. We begin the briefing with a short review of targeting policy and implementation within the constraints of available unclassified information. We then review each element of the Triad with sections on SLBMs, ICBMs, and Air-Breathing (bomber and cruise missile) systems. A short section at the end deals with the potential impact of strategic defense on offensive force planning. We consider ABM, ASAT, and air defense; but we do not attempt to address the technical issues of strategic defense per se. The final section gives a brief overview of the tritium supply problem. We conclude with a summary of recommendations that emerge from our review. The results of calculation on the effectiveness of various weapon systems as a function of cost that are presented in the briefing are by Paul Chrzanowski.

  1. Unbalanced electromagnetic forces

    E-Print Network [OSTI]

    Hansen, Craig Martin

    1974-01-01T23:59:59.000Z

    coils V ? 4 Vertical spring suspension experiment V ? 5 Horizontal suspension experiment 74 V ? 6 Linear plot of data for egg-shaped coil; horizontal suspension experiment V ? 7 Log-log plot of data for egg-shaped coil; horizontal suspension... segment L on straight line current segment L 53 V-1 Geometrical configuration of experimental coils. . . 62 V ? 2 Retational system for measuring force in various size points 65 xi ~Fi ure V ? 3 Rotational system for measuring force in egg-shaped...

  2. Direct Aerosol Forcing Uncertainty

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Mccomiskey, Allison

    Understanding sources of uncertainty in aerosol direct radiative forcing (DRF), the difference in a given radiative flux component with and without aerosol, is essential to quantifying changes in Earth's radiation budget. We examine the uncertainty in DRF due to measurement uncertainty in the quantities on which it depends: aerosol optical depth, single scattering albedo, asymmetry parameter, solar geometry, and surface albedo. Direct radiative forcing at the top of the atmosphere and at the surface as well as sensitivities, the changes in DRF in response to unit changes in individual aerosol or surface properties, are calculated at three locations representing distinct aerosol types and radiative environments. The uncertainty in DRF associated with a given property is computed as the product of the sensitivity and typical measurement uncertainty in the respective aerosol or surface property. Sensitivity and uncertainty values permit estimation of total uncertainty in calculated DRF and identification of properties that most limit accuracy in estimating forcing. Total uncertainties in modeled local diurnally averaged forcing range from 0.2 to 1.3 W m-2 (42 to 20%) depending on location (from tropical to polar sites), solar zenith angle, surface reflectance, aerosol type, and aerosol optical depth. The largest contributor to total uncertainty in DRF is usually single scattering albedo; however decreasing measurement uncertainties for any property would increase accuracy in DRF. Comparison of two radiative transfer models suggests the contribution of modeling error is small compared to the total uncertainty although comparable to uncertainty arising from some individual properties.

  3. Protective Force Program

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2000-06-30T23:59:59.000Z

    Establishes policy, requirements, responsibilities, and authorities, for the management and operation of the Department of Energy (DOE) Protective Force (PF) Program. Extended until 7-7-06 by DOE N 251.64, dated 7-7-05 Cancels: DOE 5632.7A

  4. Contractor Protective Force

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2008-11-05T23:59:59.000Z

    This Manual establishes requirements for the management and operation of the U.S. Department of Energy contractor protective forces. Cancels: DOE M 470.4-3 Chg 1, CRD (Attachment 2) only, except for Section C. Canceled by DOE O 473.3.

  5. Work Force Discipline

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    1983-03-23T23:59:59.000Z

    The order provides guidance and procedures and states responsibilities for maintaining work force discipline in DOE. Chg 1, dated 3-11-85; Chg 2, dated 1-6-86; Chg 3, dated 3-21-89; Chg 4, dated 8-2-90; Chg 5, dated 3-9-92; Chg 6, dated 8-21-92, cancels Chg 5.

  6. Lessons Learned at the Idaho National Laboratory for the Entry into Force of the U.S. Additional Protocol

    SciTech Connect (OSTI)

    Jeffrey C. Joe; Shauna A. Hoiland

    2009-07-01T23:59:59.000Z

    For a number of years, the Idaho National Laboratory (INL) has been preparing for the entry into force of the U.S. Additional Protocol (AP). These preparations included attending training, participating in tabletop exercises, preparing draft declarations, developing INL-specific guidance documents, preparing for and hosting a mock complementary access visit, and preparing declarations for official submittal. All of these activities, the training materials, and software developed by other U.S. DOE national laboratories (PNNL, ORNL, LANL, and BNL) were very helpful in preparing for the entry into force of the AP. As with any endeavor of this size and complexity, however, there are always instances where even the best preparations and advanced planning do not anticipate every challenge. As the DOE's lead nuclear energy research and development facility, the INL faced many unique challenges. The majority of research conducted at the INL is nuclear fuel cycle related, most of which is not protected by the National Security Exclusion. This paper describes the lessons learned from the INL’s experience of preparing for the entry into force of the AP, specifically how translating and implementing general principles into actual activities proved to be one of many challenges, and provides general suggestions on how to respond effectively and efficiently to routine annual data calls and other AP requests.

  7. Force Modulator System

    SciTech Connect (OSTI)

    Redmond Clark

    2009-04-30T23:59:59.000Z

    Many metal parts manufacturers use large metal presses to shape sheet metal into finished products like car body parts, jet wing and fuselage surfaces, etc. These metal presses take sheet metal and - with enormous force - reshape the metal into a fully formed part in a manner of seconds. Although highly efficient, the forces involved in forming metal parts also damage the press itself, limit the metals used in part production, slow press operations and, when not properly controlled, cause the manufacture of large volumes of defective metal parts. To date, the metal-forming industry has not been able to develop a metal-holding technology that allows full control of press forces during the part forming process. This is of particular importance in the automotive lightweighting efforts under way in the US automotive manufacturing marketplace. Metalforming Controls Technology Inc. (MC2) has developed a patented press control system called the Force Modulator that has the ability to control these press forces, allowing a breakthrough in stamping process control. The technology includes a series of hydraulic cylinders that provide controlled tonnage at all points in the forming process. At the same time, the unique cylinder design allows for the generation of very high levels of clamping forces (very high tonnages) in very small spaces; a requirement for forming medium and large panels out of HSS and AHSS. Successful production application of these systems testing at multiple stamping operations - including Ford and Chrysler - has validated the capabilities and economic benefits of the system. Although this technology has been adopted in a number of stamping operations, one of the primary barriers to faster adoption and application of this technology in HSS projects is system cost. The cost issue has surfaced because the systems currently in use are built for each individual die as a custom application, thus driving higher tooling costs. This project proposed to better marry the die-specific Force Modulator technology with stamping presses in the form of a press cushion. This system would be designed to operate the binder ring for multiple parts, thus cutting the per-die cost of the technology. This study reports the results of technology field application. This project produced the following conclusions: (1) The Force Modulator system is capable of operating at very high tempos in the stamping environment; (2) The company can generate substantial, controlled holding tonnage (binder ring pressure) necessary to hold high strength steel parts for proper formation during draw operations; (3) A single system can be designed to operate with a family of parts, thus significantly reducing the per-die cost of a FM system; (4) High strength steel parts made with these systems appear to show significant quality improvements; (5) The amounts of steel required to make these parts is typically less than the amounts required with traditional blank-holding technologies; and (6) This technology will aid in the use of higher strength steels in auto and truck production, thus reducing weight and improving fuel efficiency.

  8. Relativistic forces in Lagangian mechanics

    E-Print Network [OSTI]

    J. Muñoz Díaz

    2012-06-07T23:59:59.000Z

    We give a general definition of \\emph{relativistic force} in the context of Lagrangian mechanics. Once this is done we prove that the only relativistic forces which are linear on the velocities are those coming from differential 2-forms defined on the configuration space. In this sense, electromagnetic fields provide a mechanical system with the simplest type of relativistic forces.

  9. Atomic Force Microscope

    SciTech Connect (OSTI)

    Day, R.D.; Russell, P.E.

    1988-12-01T23:59:59.000Z

    The Atomic Force Microscope (AFM) is a recently developed instrument that has achieved atomic resolution imaging of both conducting and non- conducting surfaces. Because the AFM is in the early stages of development, and because of the difficulty of building the instrument, it is currently in use in fewer than ten laboratories worldwide. It promises to be a valuable tool for obtaining information about engineering surfaces and aiding the .study of precision fabrication processes. This paper gives an overview of AFM technology and presents plans to build an instrument designed to look at engineering surfaces.

  10. Casimir force driven ratchets

    E-Print Network [OSTI]

    Thorsten Emig

    2007-01-26T23:59:59.000Z

    We explore the non-linear dynamics of two parallel periodically patterned metal surfaces that are coupled by the zero-point fluctuations of the electromagnetic field between them. The resulting Casimir force generates for asymmetric patterns with a time-periodically driven surface-to-surface distance a ratchet effect, allowing for directed lateral motion of the surfaces in sizeable parameter ranges. It is crucial to take into account inertia effects and hence chaotic dynamics which are described by Langevin dynamics. Multiple velocity reversals occur as a function of driving, mean surface distance, and effective damping. These transport properties are shown to be stable against weak ambient noise.

  11. Work Force Restructuring Activities

    Broader source: Energy.gov (indexed) [DOE]

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742Energy China 2015ofDepartment of EnergyThePatricia Hoffman is theDr.Ulrike1, 2014Force

  12. Pairing forces in nuclei

    SciTech Connect (OSTI)

    Chasman, R.R. [Argonne National Lab., IL (United States). Physics Div.

    1996-12-31T23:59:59.000Z

    In this contribution, the author mentions some features of pairing forces that are unique to nuclei and cover some areas of major interest in nuclear structure research, that involve pairing. At the level of most nuclear structure studies, nuclei are treated as consisting of two kinds of fermions (protons and neutrons) in a valence space with rather few levels. These features give rise to unique aspects of pairing forces in nuclei: (1) n-p pairing in T = 0 as well as the usual T = 1 pairing that is characteristic of like fermions; (2) a need to correct pairing calculations for the (1/N) effects that can typically be neglected in superconducting solids. An issue of current concern is the nature of the pairing interaction: several recent studies suggest a need for a density dependent form of the pairing interaction. There is a good deal of feedback between the questions of accurate calculations of pairing interactions and the form and magnitude of the pairing interaction. Finally, the authors discuss some many-body wave functions that are a generalization of the BCS wave function form, and apply them to a calculation of energy level spacings in superdeformed rotational bands.

  13. Sensing mode atomic force microscope

    DOE Patents [OSTI]

    Hough, Paul V. C.; Wang, Chengpu

    2006-08-22T23:59:59.000Z

    An atomic force microscope is described having a cantilever comprising a base and a probe tip on an end opposite the base; a cantilever drive device connected to the base; a magnetic material coupled to the probe tip, such that when an incrementally increasing magnetic field is applied to the magnetic material an incrementally increasing force will be applied to the probe tip; a moveable specimen base; and a controller constructed to obtain a profile height of a specimen at a point based upon a contact between the probe tip and a specimen, and measure an adhesion force between the probe tip and the specimen by, under control of a program, incrementally increasing an amount of a magnetic field until a release force, sufficient to break the contact, is applied. An imaging method for atomic force microscopy involving measuring a specimen profile height and adhesion force at multiple points within an area and concurrently displaying the profile and adhesion force for each of the points is also described. A microscope controller is also described and is constructed to, for a group of points, calculate a specimen height at a point based upon a cantilever deflection, a cantilever base position and a specimen piezo position; calculate an adhesion force between a probe tip and a specimen at the point by causing an incrementally increasing force to be applied to the probe tip until the probe tip separates from a specimen; and move the probe tip to a new point in the group.

  14. Sensing mode atomic force microscope

    DOE Patents [OSTI]

    Hough, Paul V.; Wang, Chengpu

    2004-11-16T23:59:59.000Z

    An atomic force microscope is described having a cantilever comprising a base and a probe tip on an end opposite the base; a cantilever drive device connected to the base; a magnetic material coupled to the probe tip, such that when an incrementally increasing magnetic field is applied to the magnetic material an incrementally increasing force will be applied to the probe tip; a moveable specimen base; and a controller constructed to obtain a profile height of a specimen at a point based upon a contact between the probe tip and a specimen, and measure an adhesion force between the probe tip and the specimen by, under control of a program, incrementally increasing an amount of a magnetic field until a release force, sufficient to break the contact, is applied. An imaging method for atomic force microscopy involving measuring a specimen profile height and adhesion force at multiple points within an area and concurrently displaying the profile and adhesion force for each of the points is also described. A microscope controller is also described and is constructed to, for a group of points, calculate a specimen height at a point based upon a cantilever deflection, a cantilever base position and a specimen piezo position; calculate an adhesion force between a probe tip and a specimen at the point by causing an incrementally increasing force to be applied to the probe tip until the probe tip separates from a specimen; and move the probe tip to a new point in the group.

  15. Dynamic Force AFM (Asylum) | EMSL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    specifically for biological applications and can be used to: Study individual protein or DNA molecules in situ Image the surface of living cells Measure the adhesive forces of...

  16. Continuous Forcing Data, Darwin, Australia

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Jakob, Christian

    Long term, large scale continuous forcing data set for three complete wet seasons (2004-2005, 2005-2006 and 2006-2007) in Darwin, Australia.

  17. Air Force Enhanced Use Lease

    Broader source: Energy.gov (indexed) [DOE]

    S e r v i c e - E x c e l l e n c e Headquarters U.S. Air Force 1 Air Force Enhanced Use Lease Mr. Brian Brown 16 Oct. 12 I n t e g r i t y - S e r v i c e - E x c e l l e n c e 2...

  18. Air Force Renewable Energy Programs

    Broader source: Energy.gov (indexed) [DOE]

    in All We Do" I n t e g r i t y - S e r v i c e - E x c e l l e n c e THINK GREEN, BUILD GREEN, Topics Air Force Energy Use Air Force Facility Energy Center Current RE...

  19. Spanish Major Requirements (for students declared Fall 2013 and after) Prerequisites (These courses do not count toward the 27-credit minimum for the major)

    E-Print Network [OSTI]

    Wisconsin at Madison, University of

    Spanish Major Requirements (for students declared Fall 2013 and after) Prerequisites (These courses (Spanish 320, 321, or 331) Culture / Civilization (3 credits) _____ one three-credit course at or above literature course (322*, 324, or 326) *Spanish 322 is recommended for those interested in historical

  20. Protective Force Firearms Qualification Courses

    Broader source: Energy.gov (indexed) [DOE]

    points; Protective Force Firearms Qualification Courses Section A Appendix 4 July 2011 4-3 d. a projectile print within or cutting the outer ring is 2 points; and e. a projectile...

  1. Prediction of vehicle impact forces

    E-Print Network [OSTI]

    Kaderka, Darrell Laine

    1990-01-01T23:59:59.000Z

    PREDICTION OF VEHICLE IMPACT FORCES A Thesis by DARRELL LAINE KADERKA Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1990 Major Subject...: Civil Engineering PREDICTION OF VEHICLE IMPACT FORCES A Thesis by DARRELL LAINE KADERKA Approved as to style and content by: C. Eugene Buth (Chair of Committee) W. ynn Beason (Member) I? D n E. B ay (Member) es T. P. Yao (Departmen Head) May...

  2. Prediction of vehicle impact forces 

    E-Print Network [OSTI]

    Kaderka, Darrell Laine

    1990-01-01T23:59:59.000Z

    PREDICTION OF VEHICLE IMPACT FORCES A Thesis by DARRELL LAINE KADERKA Submitted to the Office of Graduate Studies of Texas ARM University in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE May 1990 Major Subject...: Civil Engineering PREDICTION OF VEHICLE IMPACT FORCES A Thesis by DARRELL LAINE KADERKA Approved as to style and content by: C. Eugene Buth (Chair of Committee) W. ynn Beason (Member) I? D n E. B ay (Member) es T. P. Yao (Departmen Head) May...

  3. Strong wind forcing of the ocean

    E-Print Network [OSTI]

    Zedler, Sarah E.

    2007-01-01T23:59:59.000Z

    latitudes, tropical storm force winds may be sufficient tolocation where hurricane force winds arrive at the region.shear data. The wind stress used to force these model was

  4. Effects of Combined Anthropogenic Forcings on Extreme Rainfall...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    are compared to the September 2009 Atlanta flood event that led to a Federal Disaster Declarations for 17 Georgia counties. Co-Authors: Willis Shem (ORNL), Ben Preston (ORNL),...

  5. U.S. Air Force Fact Sheet Air Force Reserve Officer Training Corps

    E-Print Network [OSTI]

    Su, Xiao

    U.S. Air Force Fact Sheet Air Force Reserve Officer Training Corps Mission Develop Quality Leaders for the Air Force. Personnel and Resources Air Force Reserve Officer Training Corps (ROTC) includes four,796 new Second Lieutenants who entered active duty in the United States Air Force. Organization Air Force

  6. Forces in electromagnetic field and gravitational field

    E-Print Network [OSTI]

    Zihua Weng

    2011-03-31T23:59:59.000Z

    The force can be defined from the linear momentum in the gravitational field and electromagnetic field. But this definition can not cover the gradient of energy. In the paper, the force will be defined from the energy and torque in a new way, which involves the gravitational force, electromagnetic force, inertial force, gradient of energy, and some other new force terms etc. One of these new force terms can be used to explain why the solar wind varies velocity along the magnetic force line in the interplanetary space between the sun and the earth.

  7. Conventional armed forces in Europe: Technology scenario development

    SciTech Connect (OSTI)

    Houser, G.M.

    1990-07-01T23:59:59.000Z

    In January 1986, the Soviet Union's Mikhail Gorbachev proposed elimination of all nuclear weapons by the year 2000. In April of that year, Mr. Gorbachev proposed substantial reductions of conventional weapons in Europe, from the Atlantic Ocean to the Ural Mountains, including reductions in operational-tactical nuclear weapons. In May 1986, the North Atlantic Treaty Organization (NATO) responded with the Brussels Declaration on Conventional Arms Control,'' which indicated readiness to open East/West discussions on establishing a mandate for negotiating conventional arms control throughout Europe. The Group of 23,'' which met in Vienna beginning in February 1987, concluded the meeting in January 1989 with a mandate for the Conventional Armed Forced in Europe (CFE) negotiations. On 6 March 1989, CFE talks began, and these talks have continued through six rounds (as of April 1990). Although US President George Bush, on 30 May 1989, called for agreement within six months to a year, and the Malta meeting of December 1989 called for completion of a CFE agreement by the end of 1990, much remains to be negotiated. This report provides three types of information. First, treaty provisions brought to the table by both sides are compared. Second, on the basis of these provisions, problem areas for each of the provision elements are postulated and possible scenarios for resolving these problem areas are developed. Third, the scenarios are used as requirements for tasks assigned program elements for possible US implementation of a CFE treaty. As progress is achieved during the negotiations, this report could be updated, as necessary, in each of the areas to provide a continuing systematic basis for program implementation and technology development. 8 refs.

  8. Sensing mode atomic force microscope

    DOE Patents [OSTI]

    Hough, Paul V. C. (Port Jefferson, NY); Wang, Chengpu (Upton, NY)

    2003-01-01T23:59:59.000Z

    An atomic force microscope utilizes a pulse release system and improved method of operation to minimize contact forces between a probe tip affixed to a flexible cantilever and a specimen being measured. The pulse release system includes a magnetic particle affixed proximate the probe tip and an electromagnetic coil. When energized, the electromagnetic coil generates a magnetic field which applies a driving force on the magnetic particle sufficient to overcome adhesive forces exhibited between the probe tip and specimen. The atomic force microscope includes two independently displaceable piezo elements operable along a Z-axis. A controller drives the first Z-axis piezo element to provide a controlled approach between the probe tip and specimen up to a point of contact between the probe tip and specimen. The controller then drives the first Z-axis piezo element to withdraw the cantilever from the specimen. The controller also activates the pulse release system which drives the probe tip away from the specimen during withdrawal. Following withdrawal, the controller adjusts the height of the second Z-axis piezo element to maintain a substantially constant approach distance between successive samples.

  9. Nuclear force in Lattice QCD

    E-Print Network [OSTI]

    T. T. Takahashi; T. Doi; H. Suganuma

    2006-01-05T23:59:59.000Z

    We perform the quenched lattice QCD analysis on the nuclear force (baryon-baryon interactions). We employ $20^3\\times 24$ lattice at $\\beta=5.7$ ($a\\simeq 0.19$ fm) with the standard gauge action and the Wilson quark action with the hopping parameters $\\kappa=0.1600, 0.1625, 0.1650$, and generate about 200 gauge configurations. We measure the temporal correlators of the two-baryon system which consists of heavy-light-light quarks. We extract the inter-baryon force as a function of the relative distance $r$. We also evaluate the contribution to the nuclear force from each ``Feynman diagram'' such as the quark-exchange diagram individually, and single out the roles of Pauli-blocking effects or quark exchanges in the inter-baryon interactions.

  10. Forcing in Strategic Belief Models

    E-Print Network [OSTI]

    Tohmè, Fernando; Gangle, Rocco

    2012-01-01T23:59:59.000Z

    Forcing is a methodology for building models of Set Theory satisfying certain properties. Since its inception by Paul Cohen, in the early 1960s, it has been applied to several areas in Mathematical Logic, becoming a powerful tool in the analysis of axiomatic systems. In this paper we extend the applicability of forcing to game-theoretic strategic belief models. In particular, we propose a very general notion of solutions for such games by enlarging Brandenburger's $RmAR$ condition via extension through generic types.

  11. Automatic HTS force measurement instrument

    DOE Patents [OSTI]

    Sanders, Scott T. (Valparaiso, IN); Niemann, Ralph C. (Downers Grove, IL)

    1999-01-01T23:59:59.000Z

    A device for measuring the levitation force of a high temperature superconductor sample with respect to a reference magnet includes a receptacle for holding several high temperature superconductor samples each cooled to superconducting temperature. A rotatable carousel successively locates a selected one of the high temperature superconductor samples in registry with the reference magnet. Mechanism varies the distance between one of the high temperature superconductor samples and the reference magnet, and a sensor measures levitation force of the sample as a function of the distance between the reference magnet and the sample. A method is also disclosed.

  12. Automatic HTS force measurement instrument

    DOE Patents [OSTI]

    Sanders, S.T.; Niemann, R.C.

    1999-03-30T23:59:59.000Z

    A device is disclosed for measuring the levitation force of a high temperature superconductor sample with respect to a reference magnet includes a receptacle for holding several high temperature superconductor samples each cooled to superconducting temperature. A rotatable carousel successively locates a selected one of the high temperature superconductor samples in registry with the reference magnet. Mechanism varies the distance between one of the high temperature superconductor samples and the reference magnet, and a sensor measures levitation force of the sample as a function of the distance between the reference magnet and the sample. A method is also disclosed. 3 figs.

  13. Solvent-induced forces in protein folding

    SciTech Connect (OSTI)

    Ben-Naim, A. (Hebrew Univ., Jerusalem (Israel))

    1990-08-23T23:59:59.000Z

    The solvent-induced forces between various groups on the protein are examined. It is found that the intramolecular hydrophilic forces are likely to be the strongest forces mediated through the solvent. It is argued that these are probably the most important solvent-induced driving forces in the process of protein folding.

  14. October 9, 2014- SEAB Task Force Meeting

    Broader source: Energy.gov [DOE]

    SECRETARY OF ENERGY ADVISORY BOARDTask Force Meeting on Technology Development for Environmental Management (EM)

  15. Nanoscale Optical Devices: Force, Torque and Modulator

    E-Print Network [OSTI]

    Liu, Ming

    2010-01-01T23:59:59.000Z

    enhancements produced by a bowtie (Butterworth Heinemann,stronger binding forces. For bowtie structures, the field

  16. LABORATORY I FORCES AND EQUILIBRIUM

    E-Print Network [OSTI]

    Minnesota, University of

    of equilibrium is the result of a balance among all of the different forces interacting with the object (sections 1-10), chapter 4 (sections 1, 2, 5- 7), the paragraph at equation 6-13, chapter 10 (sections 5 problems before your lecturer addresses this material. So, it is very important that you read the text

  17. The Engineering of Optical Conservative Force

    E-Print Network [OSTI]

    Du, Junjie; Ding, Kun; Du, Guiqiang; Lin, Zhifang; Chan, C T; Ng, Jack

    2015-01-01T23:59:59.000Z

    Optical forces have been fruitfully applied in a broad variety of areas that not only span the traditional scientific fields such as physics, chemistry, and biology, but also in more applied fields. It is customary and useful to split the optical force into the (conservative) gradient force and the (non-conservative) scattering and absorption force. These forces are different in attributes. The ability to tailor them will open great potential in fundamental optics and practical applications. Here, we present an analytical and a numerical approach to calculate these forces, and, with these tools, we create a fairly general class of 2D conservative optical force field. In general, particles immersed in an optical force do not obey equilibrium statistical mechanics, making the analysis complicated. With conservative forces, these issues are resolved.

  18. Centrifugal force in Kerr geometry

    E-Print Network [OSTI]

    Sai Iyer; A R Prasanna

    1992-07-31T23:59:59.000Z

    We have obtained the correct expression for the centrifugal force acting on a particle at the equatorial circumference of a rotating body in the locally non-rotating frame of the Kerr geometry. Using this expression for the equilibrium of an element on the surface of a slowly rotating Maclaurin spheroid, we obtain the expression for the ellipticity (as discussed earlier by Abramowicz and Miller) and determine the radius at which the ellipticity is maximum.

  19. Hydrodynamic forces on piggyback pipelines

    SciTech Connect (OSTI)

    Jakobsen, M.L.; Sayer, P. [Univ. of Strathclyde, Glasgow (United Kingdom)

    1995-12-31T23:59:59.000Z

    An increasing number of new offshore pipelines have been designed as bundles, mainly because of overall cost reductions. One popular way of combining two pipelines with different diameters is the piggyback configuration, with the smaller pipeline strapped on top of the main pipeline. The external hydrodynamic forces on this combination are at present very roughly estimated; pipeline engineers need more data to support their designs. This paper presents experimental results for the in-line hydrodynamic loading on three different piggyback set-ups. The models comprised a 0.4 m main pipeline, and three piggyback pipelines with diameters of 0.038 m, 0.059 m and 0.099 m. Each small pipeline was separately mounted to the main pipeline, with a gap equal to its own diameter. These model sizes lie approximately between half- and full-scale. Experiments were undertaken for K{sub C} between 5 and 42, and R{sub e} in the range 0.0 * 10{sup 4} to 8.5 * 10{sup 5}. The results based on Morison`s equation indicate that a simple addition of the separate forces acting on each cylinder underestimates the actual force by up to 35% at low K{sub C} (< {approximately} 10) and by as much as 100% in the drag-dominated regime (K{sub C} > {approximately} 20).

  20. Friction forces in cosmological models

    E-Print Network [OSTI]

    Donato Bini; Andrea Geralico; Daniele Gregoris; Sauro Succi

    2014-08-23T23:59:59.000Z

    We investigate the dynamics of test particles undergoing friction forces in a Friedmann-Robertson-Walker (FRW) spacetime. The interaction with the background fluid is modeled by introducing a Poynting-Robertson-like friction force in the equations of motion, leading to measurable (at least in principle) deviations of the particle trajectories from geodesic motion. The effect on the peculiar velocities of the particles is investigated for various equations of state of the background fluid and different standard cosmological models. The friction force is found to have major effects on particle motion in closed FRW universes, where it turns the time-asymptotic value (approaching the recollapse) of the peculiar particle velocity from ultra-relativistic (close to light speed) to a co-moving one, i.e., zero peculiar speed. On the other hand, for open or flat universes the effect of the friction is not so significant, because the time-asymptotic peculiar particle speed is largely non-relativistic also in the geodesic case.

  1. On Dynamic Models of Robot Force Control

    E-Print Network [OSTI]

    Eppinger, Steven D.

    1986-07-01T23:59:59.000Z

    For precise robot control, endpoint compliance strategies utilize feedback from a force sensor located near the tool/workpiece interface. Such endpoint force control systems have been observed in the laboratory to be ...

  2. Handheld force-controlled ultrasound probe

    E-Print Network [OSTI]

    Gilbertson, Matthew Wright

    2010-01-01T23:59:59.000Z

    An hand-held force controlled ultrasound probe has been developed. The controller maintains a prescribed contact force between the probe and a patient's body. The device will enhance the diagnostic capability of free-hand ...

  3. Nuclear Radiological Threat Task Force Established | National...

    National Nuclear Security Administration (NNSA)

    Radiological Threat Task Force Established | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile Preventing...

  4. Glacial cycles and astronomical forcing

    SciTech Connect (OSTI)

    Muller, R.A. [Lawrence Berkeley Lab., CA (United States)] [Lawrence Berkeley Lab., CA (United States); MacDonald, G.J. [International Institute for Applied Systems Analysis, Laxenburg (Austria)] [International Institute for Applied Systems Analysis, Laxenburg (Austria)

    1997-07-11T23:59:59.000Z

    Narrow spectral features in ocean sediment records offer strong evidence that the cycles of glaciation were driven by astronomical forces. Two million years ago, the cycles match the 41,000-year period of Earth`s obliquity. This supports the Croll/Milankovitch theory, which attributes the cycles to variations in insolation. But for the past million years, the spectrum is dominated by a single 100,000-year feature and is a poor match to the predictions of insolation models. The spectrum can be accounted for by a theory that derives the cycles of glaciation from variations in the inclination of Earth`s orbital plane.

  5. Thermomagnetic Force in Polyatomic Gases

    E-Print Network [OSTI]

    Larchez, M. E.; Adair, Thomas W.

    1971-01-01T23:59:59.000Z

    decreases as H/P is increased above about 500 Oe/Torr. Another difference in the two effects is that the SB effect is a universal function of H/P for the entire range of values covered. This does not appear to be true in the force effect. For NO... magnetic field also causes a de- crease in the shear viscosity of oxygen. These effects in Oz were later observed in NO and were extensively studied. It was observed that the trans- port coefficients decrease in a magnetic field 8, that the effect...

  6. Modeling forces in high-temperature superconductors

    SciTech Connect (OSTI)

    Turner, L. R.; Foster, M. W.

    1997-11-18T23:59:59.000Z

    We have developed a simple model that uses computed shielding currents to determine the forces acting on a high-temperature superconductor (HTS). The model has been applied to measurements of the force between HTS and permanent magnets (PM). Results show the expected hysteretic variation of force as the HTS moves first toward and then away from a permanent magnet, including the reversal of the sign of the force. Optimization of the shielding currents is carried out through a simulated annealing algorithm in a C++ program that repeatedly calls a commercial electromagnetic software code. Agreement with measured forces is encouraging.

  7. Air Force Research Laboratory Placement: Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson

    E-Print Network [OSTI]

    Alpay, S. Pamir

    Air Force Research Laboratory Placement: Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright-Patterson Air Force Base, Dayton OH Discipline(s): Materials science/engineering, chemical. Description: We are looking for a qualified candidate to join our team at the Air Force Research Laboratory

  8. Wood Fuel Task Force Response 2 | Wood Fuel Task Force Response

    E-Print Network [OSTI]

    Wood Fuel Task Force Response #12;2 | Wood Fuel Task Force Response #12;Wood Fuel Task Force Response | 3 Wood Fuel Task Force Response Scottish Government response by Minister for Environment, Michael Russell I am pleased to present on behalf of the Scottish Government our response to the Wood Fuel

  9. Direct measurement of thermophoretic forces

    E-Print Network [OSTI]

    Laurent Helden; Ralf Eichhorn; Clemens Bechinger

    2014-12-19T23:59:59.000Z

    We study the thermophoretic motion of a micron sized single colloidal particle in front of a flat wall by evanescent light scattering. To quantify thermophoretic effects we analyse the nonequilibrium steady state (NESS) of the particle in a constant temperature gradient perpendicular to the confining walls. We propose to determine thermophoretic forces from a 'generalized potential' associated with the probability distribution of the particle position in the NESS. Experimentally we demonstrate, how this spatial probability distribution is measured and how thermophoretic forces can be extracted with 10 fN resolution. By varying temperature gradient and ambient temperature, the temperature dependence of Soret coefficient $S_T(T)$ is determined for $r = 2.5 \\mu m$ polystyrene and $r = 1.35 \\mu m$ melamine particles. The functional form of $S_T(T)$ is in good agreement with findings for smaller colloids. In addition, we measure and discuss hydrodynamic effects in the confined geometry. The theoretical and experimental technique proposed here extends thermophoresis measurements to so far inaccessible particle sizes and particle solvent combinations.

  10. Casimir force: an alternative treatment

    E-Print Network [OSTI]

    P. R. Silva

    2009-01-07T23:59:59.000Z

    The Casimir force between two parallel uncharged closely spaced metallic plates is evaluated in ways alternatives to those usually considered in the literature. In a first approximation we take in account the suppressed quantum numbers of a cubic box, representing a cavity which was cut in a metallic block. We combine these ideas with those of the MIT bag model of hadrons, but adapted to non-relativistic particles. In a second approximation we consider the particles occupying the energy levels of the Bohr atom, so that the Casimir force depends explicitly on the fine structure constant alpha. In both treatments, the mean energies which have explicit dependence on the particle mass and on the maximum occupied quantum number (related to the Fermi level of the system) at the beginning of the calculations, have these dependences mutually canceled at the end of them. Finally by comparing the averaged energies computed in both approximations, we are able to make an estimate of the value of the fine structure constant alpha.

  11. Air Force Renewable Energy Programs | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    Air Force Renewable Energy Programs Air Force Renewable Energy Programs Presentation covers Air Force Renewable Energy Programs and is given at the Spring 2011 Federal Utility...

  12. Protective Force Protocols for ESS Supported Performance Tests...

    Broader source: Energy.gov (indexed) [DOE]

    security force-on-force performance tests and exercises. Protective Force Protocols for ESS Supported Performance Tests and Exercises, March 12, 2007 More Documents & Publications...

  13. Dark Forces At The Tevatron

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Buckley, Matt [Fermilab; Fileviez Perez, Pavel [Wisconsin U., Madison; Hooper, Dan [Fermilab; Chicago U., Astron. Astrophys. Ctr.; Neil, Ethan [Fermilab

    2011-08-19T23:59:59.000Z

    A simple explanation of the W + dijet excess recently reported by the CDF collaboration involves the introduction of a new gauge boson with sizable couplings to quarks, but with no or highly suppressed couplings to leptons. Anomaly-free theories which include such a leptophobic gauge boson must also include additional particle content, which may include a stable and otherwise viable candidate for dark matter. Based on the couplings and mass of the Z` required to generate the CDF excess, we predict such a dark matter candidate to possess an elastic scattering cross section with nucleons on the order of ? ~ 10-40 cm2, providing a natural explanation for the signals reported by the CoGeNT and DAMA/LIBRA collaborations. In this light, CDF may be observing the gauge boson responsible for the force which mediates the interactions between the dark and visible matter of our universe.

  14. Fast Computation of Optimal Contact Forces

    E-Print Network [OSTI]

    2007-09-28T23:59:59.000Z

    and force optimization for the legs of a quadruped robot [21]. Some experimental ... Applications that involve the solution of many FOPs, such as finding the ...

  15. Interagency Energy Management Task Force Members

    Broader source: Energy.gov [DOE]

    The Interagency Energy Management Task Force is led by the Federal Energy Management Program director. Members include energy and sustainability managers from federal agencies.

  16. Nuclear forces from chiral effective field theory

    E-Print Network [OSTI]

    R. Machleidt

    2007-04-05T23:59:59.000Z

    In this lecture series, I present the recent progress in our understanding of nuclear forces in terms of chiral effective field theory.

  17. Ellsworth Air Force Base Advanced Metering Project

    Broader source: Energy.gov [DOE]

    Presentation covers the Ellsworth Air Force Base Advanced Metering project and is given at the Spring 2010 Federal Utility Partnership Working Group (FUPWG) meeting in Providence, Rhode Island.

  18. Reduction of the Casimir force using aerogels

    E-Print Network [OSTI]

    Esquivel-Sirvent, R

    2007-01-01T23:59:59.000Z

    By using silicon oxide based aerogels we show numerically that the Casimir force can be reduced several orders of magnitude, making its effect negligible in nanodevices. This decrease in the Casimir force is also present even when the aerogels are deposited on metallic substrates. To calculate the Casimir force we model the dielectric function of silicon oxide aerogels using an effective medium dielectric function such as the Clausius-Mossotti approximation. The results show that both the porosity of the aerogel and its thickness can be use as control parameters to reduce the magnitude of the Casimir force.

  19. Reduction of the Casimir force using aerogels

    E-Print Network [OSTI]

    R. Esquivel-Sirvent

    2007-08-02T23:59:59.000Z

    By using silicon oxide based aerogels we show numerically that the Casimir force can be reduced several orders of magnitude, making its effect negligible in nanodevices. This decrease in the Casimir force is also present even when the aerogels are deposited on metallic substrates. To calculate the Casimir force we model the dielectric function of silicon oxide aerogels using an effective medium dielectric function such as the Clausius-Mossotti approximation. The results show that both the porosity of the aerogel and its thickness can be use as control parameters to reduce the magnitude of the Casimir force.

  20. Few-nucleon forces from chiral Lagrangians

    SciTech Connect (OSTI)

    van Kolck, U. (Department of Physics, FM-15, University of Washington, Seattle, Washington 98195 (United States))

    1994-06-01T23:59:59.000Z

    Few-nucleon forces are considered from the point of view of effective chiral Lagrangians. It is argued that such forces naturally arise at the same order in chiral perturbation theory as some important features of the two-nucleon force. In particular, the leading few-nucleon forces cancel against the leading recoil correction in the iteration of the two-body potential. The remaining three-body potential is presented in momentum and coordinate spaces. It is dominated by contributions of the delta isobar of (i) two-pion range, which are not new, and (ii) shorter range, which involve an undetermined parameter.

  1. Document prepared by APIC Bioterrorism Task Force

    E-Print Network [OSTI]

    Oliver, Douglas L.

    ATTACHMENT Document prepared by APIC Bioterrorism Task Force Judith F. English, Mae Y. Cundiff of civilian populations not recommended. 3. Infection Control Practices for Patient Management Symptomatic

  2. Nuclear Force from Lattice QCD

    E-Print Network [OSTI]

    Noriyoshi ISHII; Sinya AOKI; Tetsuo HATSUDA

    2006-09-30T23:59:59.000Z

    The first lattice QCD result on the nuclear force (the NN potential) is presented in the quenched level. The standard Wilson gauge action and the standard Wilson quark action are employed on the lattice of the size 16^3\\times 24 with the gauge coupling beta=5.7 and the hopping parameter kappa=0.1665. To obtain the NN potential, we adopt a method recently proposed by CP-PACS collaboration to study the pi pi scattering phase shift. It turns out that this method provides the NN potentials which are faithful to those obtained in the analysis of NN scattering data. By identifying the equal-time Bethe-Salpeter wave function with the Schroedinger wave function for the two nucleon system, the NN potential is reconstructed so that the wave function satisfies the time-independent Schroedinger equation. In this report, we restrict ourselves to the J^P=0^+ and I=1 channel, which enables us to pick up unambiguously the ``central'' NN potential V_{central}(r). The resulting potential is seen to posses a clear repulsive core of about 500 MeV at short distance (r < 0.5 fm). Although the attraction in the intermediate and long distance regions is still missing in the present lattice set-up, our method is appeared to be quite promising in reconstructing the NN potential with lattice QCD.

  3. Sustainability Initiative Task Force Final Report

    E-Print Network [OSTI]

    Sheridan, Jennifer

    UW­Madison Sustainability Initiative Task Force Final Report October 2010 #12;We are pleased to present the final report of the campus Sustainability Task Force. This report fulfills the charge we gave to sustainability for consideration by UW­Madison's leadership and campus community. There are many reasons why

  4. Gravitational force between two electrons in superconductors

    E-Print Network [OSTI]

    Clovis Jacinto de Matos

    2007-11-19T23:59:59.000Z

    The attractive gravitational force between two electrons in superconductors is deduced from the Eddington-Dirac large number relation, together with Beck and Mackey electromagnetic model of vacuum energy in superconductors. This force is estimated to be weaker than the gravitational attraction between two electrons in the vacuum.

  5. Water Conservation Task Force (2014 Charge)

    E-Print Network [OSTI]

    California at Santa Cruz, University of

    Water Conservation Task Force (2014 Charge) The Task Force will advise the Chancellor and Campus Provost/Executive Vice Chancellor (CP/EVC) on current and past water use and provide recommendations on implementation of policies for potable water use reductions in support of The Regents Policy on Sustainable

  6. On Dual Configurational Forces SHAOFAN LIj

    E-Print Network [OSTI]

    Li, Shaofan

    they provide the dual energy­momentum tensor. Some previously unknown and yet interesting results in elasticity the configuration force (energy­momentum tensor) P and the dual configuration force (dual energy­momentum tensor) L energy­ momentum tensor (referred to as the dual energy­momentum tensor in this j Corresponding author

  7. Air Force | Army | Marine Corps Navy & Coast Guard General of the Air Force/Army

    E-Print Network [OSTI]

    Air Force | Army | Marine Corps Navy & Coast Guard O-10 General of the Air Force/Army (Reserved Corps Navy & Coast Guard WarrantOfficers No Warrant Officer Rank Warrant Officer 1 Chief Warrant Officer Warrant Officer 5 Air Force Army Marine Corps Navy & Coast Guard E-9 Chief Master Sergeant of the Air

  8. Macroscopic model of scanning force microscope

    DOE Patents [OSTI]

    Guerra-Vela, Claudio; Zypman, Fredy R.

    2004-10-05T23:59:59.000Z

    A macroscopic version of the Scanning Force Microscope is described. It consists of a cantilever under the influence of external forces, which mimic the tip-sample interactions. The use of this piece of equipment is threefold. First, it serves as direct way to understand the parts and functions of the Scanning Force Microscope, and thus it is effectively used as an instructional tool. Second, due to its large size, it allows for simple measurements of applied forces and parameters that define the state of motion of the system. This information, in turn, serves to compare the interaction forces with the reconstructed ones, which cannot be done directly with the standard microscopic set up. Third, it provides a kinematics method to non-destructively measure elastic constants of materials, such as Young's and shear modules, with special application for brittle materials.

  9. Measurement of tool forces in diamond turning

    SciTech Connect (OSTI)

    Drescher, J.; Dow, T.A.

    1988-12-01T23:59:59.000Z

    A dynamometer has been designed and built to measure forces in diamond turning. The design includes a 3-component, piezoelectric transducer. Initial experiments with this dynamometer system included verification of its predicted dynamic characteristics as well as a detailed study of cutting parameters. Many cutting experiments have been conducted on OFHC Copper and 6061-T6 Aluminum. Tests have involved investigation of velocity effects, and the effects of depth and feedrate on tool forces. Velocity has been determined to have negligible effects between 4 and 21 m/s. Forces generally increase with increasing depth of cut. Increasing feedrate does not necessarily lead to higher forces. Results suggest that a simple model may not be sufficient to describe the forces produced in the diamond turning process.

  10. Muon Collider Task Force Report

    SciTech Connect (OSTI)

    Ankenbrandt, C.; Alexahin, Y.; Balbekov, V.; Barzi, E.; Bhat, C.; Broemmelsiek, D.; Bross, A.; Burov, A.; Drozhdin, A.; Finley, D.; Geer, S.; /Fermilab /Argonne /Brookhaven /Jefferson Lab /LBL, Berkeley /MUONS Inc., Batavia /UCLA /UC, Riverside /Mississippi U.

    2007-12-01T23:59:59.000Z

    Muon Colliders offer a possible long term path to lepton-lepton collisions at center-of-mass energies {radical}s {ge} 1 TeV. In October 2006 the Muon Collider Task Force (MCTF) proposed a program of advanced accelerator R&D aimed at developing the Muon Collider concept. The proposed R&D program was motivated by progress on Muon Collider design in general, and in particular, by new ideas that have emerged on muon cooling channel design. The scope of the proposed MCTF R&D program includes muon collider design studies, helical cooling channel design and simulation, high temperature superconducting solenoid studies, an experimental program using beams to test cooling channel RF cavities and a 6D cooling demonstration channel. The first year of MCTF activities are summarized in this report together with a brief description of the anticipated FY08 R&D activities. In its first year the MCTF has made progress on (1) Muon Collider ring studies, (2) 6D cooling channel design and simulation studies with an emphasis on the HCC scheme, (3) beam preparations for the first HPRF cavity beam test, (4) preparations for an HCC four-coil test, (5) further development of the MANX experiment ideas and studies of the muon beam possibilities at Fermilab, (6) studies of how to integrate RF into an HCC in preparation for a component development program, and (7) HTS conductor and magnet studies to prepare for an evaluation of the prospects for of an HTS high-field solenoid build for a muon cooling channel.

  11. Hydrodynamic force characteristics in the splash zone

    SciTech Connect (OSTI)

    Daliri, M.R.; Haritos, N. [Univ. of Melbourne, Parkville, Victoria (Australia). Dept. of Civil and Environmental Engineering

    1996-12-31T23:59:59.000Z

    A comprehensive experimental study concerned with the hydrodynamic force characteristics of both rigid and compliant surface piercing cylinders, with a major focus on the local nature of these characteristics as realized in the splash zone and in the fully submerged zone immediately below this region, has been in progress at the University of Melbourne for the last three years. This paper concentrates on a portion of this study associated with uni-directional regular wave inputs with wave steepness (H/{lambda}) in the range 0.0005--0.1580 and Keulegan-Carpenter (KC) numbers in the range 2--15 which encompasses inertia force dominant (KC<5) to drag force significant conditions (5forces (using a multi-segmented force transducer) and the underlying kinematics (using Acoustic Doppler Velocimetry) at different elevations throughout the crest to trough region were measured during the tests. The measured wave forces at different elevations have been interpreted using the Morison equation to determine experimental values of force coefficients C{sub D} and C{sub M}. The results in hand suggest that both C{sub D} and C{sub M} values in the splash zone are higher and exhibit a mild frequency dependence in comparison with their corresponding counterparts for the fully submerged segments. For weakly nonlinear waves (H/{lambda}<0.1) only wave fluctuation is found to be important and any mild nonlinearities do not significantly affect the test model force response and consequently the force coefficient values. However, for relatively nonlinear waves (0.1force response, producing ringing effects in conducive conditions.

  12. High-speed force mapping on living cells with a small cantilever atomic force microscope

    SciTech Connect (OSTI)

    Braunsmann, Christoph; Seifert, Jan; Rheinlaender, Johannes; Schäffer, Tilman E., E-mail: Tilman.Schaeffer@uni-tuebingen [Institute of Applied Physics and LISA, University of Tübingen, Auf der Morgenstelle 10, 72076 Tübingen (Germany)

    2014-07-15T23:59:59.000Z

    The imaging speed of the wide-spread force mapping mode for quantitative mechanical measurements on soft samples in liquid with the atomic force microscope (AFM) is limited by the bandwidth of the z-scanner and viscous drag forces on the cantilever. Here, we applied high-speed, large scan-range atomic force microscopy and small cantilevers to increase the speed of force mapping by ?10?100 times. This allowed resolving dynamic processes on living mouse embryonic fibroblasts. Cytoskeleton reorganization during cell locomotion, growth of individual cytoskeleton fibers, cell blebbing, and the formation of endocytic pits in the cell membrane were observed. Increasing the force curve rate from 2 to 300 Hz increased the measured apparent Young's modulus of the cells by about 10 times, which facilitated force mapping measurements at high speed.

  13. Sensing Current and Forces with SPM

    SciTech Connect (OSTI)

    Park, Jeong Y.; Maier, Sabine; Hendriksen, Bas; Salmeron, Miquel

    2010-07-02T23:59:59.000Z

    Atomic force microscopy (AFM) and scanning tunneling microscopy (STM) are well established techniques to image surfaces and to probe material properties at the atomic and molecular scale. In this review, we show hybrid combinations of AFM and STM that bring together the best of two worlds: the simultaneous detection of atomic scale forces and conduction properties. We illustrate with several examples how the detection of forces during STM and the detection of currents during AFM can give valuable additional information of the nanoscale material properties.

  14. A Dynamic Defense Force for Japan

    E-Print Network [OSTI]

    TAKAHASHI, Sugio

    2012-01-01T23:59:59.000Z

    Japan Self-Defense Forces (SDF). Along with the new NDPG,set a direction for the SDF in the post-9/11 inter- nationalsituation also requires the SDF take on these “dynamic”

  15. Forces on laboratory model dredge cutterhead

    E-Print Network [OSTI]

    Young, Dustin Ray

    2010-07-14T23:59:59.000Z

    Dredge cutting forces produced by the movement of the cutterhead through the sediment have been measured with the laboratory dredge carriage located at the Haynes Coastal Engineering Laboratory. The sediment bed that was used for the dredging test...

  16. Optical Force Measurements In Concentrated Colloidal Suspensions 

    E-Print Network [OSTI]

    Wilson, Laurence

    2007-01-01T23:59:59.000Z

    This work concerns the construction and testing of an optical tweezers-based force transducer, and its application to a hard-sphere colloidal system. A particle in an optical trap forward-scatters a fraction of the ...

  17. Forced orientation of graphs Babak Farzad

    E-Print Network [OSTI]

    Toronto, University of

    Forced orientation of graphs Babak Farzad Mohammad Mahdian Ebad S. Mahmoodian Amin Saberi§ Bardia, USA. (saberi@cc.gatech.edu) ¶ Department of Computer Science, UIUC, Urbana, USA. (sadri@cs.uiuc.edu) 1

  18. Accurate capacitive metrology for atomic force microscopy

    E-Print Network [OSTI]

    Mazzeo, Aaron D. (Aaron David), 1979-

    2005-01-01T23:59:59.000Z

    This thesis presents accurate capacitive sensing metrology designed for a prototype atomic force microscope (AFM) originally developed in the MIT Precision Motion Control Lab. The capacitive measurements use a set of ...

  19. Interfacial forces in chemical-mechanical polishing

    E-Print Network [OSTI]

    Ng, Dedy

    2009-05-15T23:59:59.000Z

    for planarization. The process takes place at the interface of a substrate, a polishing pad, and an abrasive containing slurry. This synergetic process involves several forces in multi-length scales and multi-mechanisms. This research contributes fundamental...

  20. SCM Forcing Data Derived from NWP Analyses

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Jakob, Christian

    Forcing data, suitable for use with single column models (SCMs) and cloud resolving models (CRMs), have been derived from NWP analyses for the ARM (Atmospheric Radiation Measurement) Tropical Western Pacific (TWP) sites of Manus Island and Nauru.

  1. Scattering theory approach to electrodynamic Casimir forces

    E-Print Network [OSTI]

    Rahi, Sahand Jamal

    We give a comprehensive presentation of methods for calculating the Casimir force to arbitrary accuracy, for any number of objects, arbitrary shapes, susceptibility functions, and separations. The technique is applicable ...

  2. Clinch River MRS Task Force Recommendations

    Broader source: Energy.gov [DOE]

    The Clinch River HRS Task Force was appointed in July 1985 by the Roane County Executive and the Oak Ridge City Council to evaluate the Monitored Retrievable Storage (MRS) facility proposed by the...

  3. Casimir forces in the time domain: Applications

    E-Print Network [OSTI]

    Johnson, Steven G.

    Our previous article [Phys. Rev. A 80, 012115 (2009)] introduced a method to compute Casimir forces in arbitrary geometries and for arbitrary materials that was based on a finite-difference time-domain (FDTD) scheme. In ...

  4. Forces on laboratory model dredge cutterhead 

    E-Print Network [OSTI]

    Young, Dustin Ray

    2010-07-14T23:59:59.000Z

    Dredge cutting forces produced by the movement of the cutterhead through the sediment have been measured with the laboratory dredge carriage located at the Haynes Coastal Engineering Laboratory. The sediment bed that was ...

  5. Micromechanical apparatus for measurement of forces

    DOE Patents [OSTI]

    Tanner, Danelle Mary; Allen, James Joe

    2004-05-25T23:59:59.000Z

    A new class of micromechanical dynamometers has been disclosed which are particularly suited to fabrication in parallel with other microelectromechanical apparatus. Forces in the microNewton regime and below can be measured with such dynamometers which are based on a high-compliance deflection element (e.g. a ring or annulus) suspended above a substrate for deflection by an applied force, and one or more distance scales for optically measuring the deflection.

  6. Agencies Approve Bacteria TMDL Task Force Recommendations 

    E-Print Network [OSTI]

    Wythe, Kathy

    2007-01-01T23:59:59.000Z

    tx H2O | pg. 10 In June 2007 the Texas Commission onEnvironmental Quality (TCEQ) and the TexasState Soil and Water Conservation Board (TSSW- CB) approved the recommendations of the Bacteria Total Maximum Daily Load (TMDL) Task Force and asked... their agencies to update their TMDL guidance documents to reflect these recommendations. They also authorized establishing a multi-agency bacteria TMDL work group to examine the research and development needs identified in the task force report. Both TCEQ...

  7. Calculation of rotordynamic forces on labyrinth seals

    E-Print Network [OSTI]

    Hensel, Steve John

    1986-01-01T23:59:59.000Z

    CALCULATION OF ROTORDYNAMIC FORCES ON LABYRINTH SEALS A Thesis STEVE JOHN HENSEL Submitted to the Graduate College of Texas AkM University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1986 Major... Subject: Mechanical Engineering CALCULATION OF ROTORDYNAMIC FORCES ON LABYRINTH SEALS A Thesis by STEVE JOHN HENSEL Approved as to style snd content by: David Rhode (Chairman of Committee) Erian Baskharone Leel and Garison (Member) +, gg, W. D...

  8. Zipping mechanism for force-generation by growing filament bundles

    E-Print Network [OSTI]

    Torsten Kuehne; Reinhard Lipowsky; Jan Kierfeld

    2011-03-02T23:59:59.000Z

    We investigate the force generation by polymerizing bundles of filaments, which form because of short-range attractive filament interactions. We show that bundles can generate forces by a zipping mechanism, which is not limited by buckling and operates in the fully buckled state. The critical zipping force, i.e. the maximal force that a bundle can generate, is given by the adhesive energy gained during bundle formation. For opposing forces larger than the critical zipping force, bundles undergo a force-induced unbinding transition. For larger bundles, the critical zipping force depends on the initial configuration of the bundles. Our results are corroborated by Monte Carlo simulations.

  9. Government and Industry A Force for Collaboration at the Energy...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Government and Industry A Force for Collaboration at the Energy Roadmap Update Workshop Government and Industry A Force for Collaboration at the Energy Roadmap Update Workshop...

  10. Dilution and resonance-enhanced repulsion in nonequilibrium fluctuation forces

    E-Print Network [OSTI]

    Bimonte, Giuseppe

    In equilibrium, forces induced by fluctuations of the electromagnetic field between electrically polarizable objects (microscopic or macroscopic) in vacuum are generically attractive. The force may, however, become repulsive ...

  11. Before the Senate Subcommittee on Strategic Forces - Committee...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Subcommittee on Strategic Forces - Committee on Armed Services Before the Senate Subcommittee on Strategic Forces - Committee on Armed Services Testimony of James Ownedoff, Acting...

  12. Comprehensive Energy Program at Patrick Air Force Base Set to...

    Broader source: Energy.gov (indexed) [DOE]

    Comprehensive Energy Program at Patrick Air Force Base Set to Exceed Energy Goals Comprehensive Energy Program at Patrick Air Force Base Set to Exceed Energy Goals Fact sheet...

  13. 6.641 Electromagnetic Fields, Forces, and Motion, Spring 2003

    E-Print Network [OSTI]

    Zahn, Markus, 1946-

    Electric and magnetic quasistatic forms of Maxwell's equations applied to dielectric, conduction, and magnetization boundary value problems. Electromagnetic forces, force densities, and stress tensors, including magnetization ...

  14. Federal Task Force Sends Recommendations to President on Fostering...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Task Force Sends Recommendations to President on Fostering Clean Coal Technology Federal Task Force Sends Recommendations to President on Fostering Clean Coal Technology August 12,...

  15. Hickam Air Force Base Fuel Cell Vehicles: Early Implementation...

    Broader source: Energy.gov (indexed) [DOE]

    Hickam Air Force Base Fuel Cell Vehicles: Early Implementation Experience Hickam Air Force Base Fuel Cell Vehicles: Early Implementation Experience This report sumarizes early...

  16. Collaborative Utility Task Force Partners with DOE to Develop...

    Energy Savers [EERE]

    Collaborative Utility Task Force Partners with DOE to Develop Cyber Security Requirements for Advanced Metering Infrastructure Collaborative Utility Task Force Partners with DOE to...

  17. Hydrodynamic forces and surface topography: Centimeter-scale spatial variation in wave forces

    E-Print Network [OSTI]

    Denny, Mark

    Hydrodynamic forces and surface topography: Centimeter-scale spatial variation in wave forces. On the rugose rock surfaces of wave-swept shores, interactions between substratum topography and wave-induced flow may create such a spatially variable environment. Topography Numerous investigators have explored

  18. Measurement of Dynamical Forces between Deformable Drops Using the Atomic Force Microscope. I. Theory

    E-Print Network [OSTI]

    Chan, Derek Y C

    effects of electrical double layer repulsion between oil drops charged by adsorbed surfactant mainly to hydrodynamic lubrication forces. 1. Introduction The atomic force microscope (AFM) has long, such as the interaction between rigid probe particles and oil drops1-4 or between a particle and a bubble.5

  19. Structural Dynamics The spring force is given by and F(t) is the driving force.

    E-Print Network [OSTI]

    Veress, Alexander

    by dry or Coulomb friction between rigid bodies, by internal friction between molecules within/displacement curve. #12;All vibrations are damped to some degree by friction forces. These forces may be caused a deformable body, or by fluid friction when a body moves in a fluid. These result in natural circular

  20. Estimation of Contact Forces using a Virtual Force Sensor Emanuele Magrini Fabrizio Flacco Alessandro De Luca

    E-Print Network [OSTI]

    De Luca, Alessandro

    the exchanged Cartesian forces; 4) control the robot to react according to a desired behavior. Different model Alessandro De Luca Abstract-- Physical human-robot collaboration is character- ized by a suitable exchange of contact forces between human and robot, which can occur in general at any point along the robot structure

  1. A noise inequality for classical forces

    E-Print Network [OSTI]

    Dvir Kafri; J. M. Taylor

    2013-11-18T23:59:59.000Z

    Lorentz invariance requires local interactions, with force laws such as the Coulomb interaction arising via virtual exchange of force carriers such as photons. Many have considered the possibility that, at long distances or large mass scales, this process changes in some way to lead to classical behavior. Here we hypothesize that classical behavior could be due to an inability of some force carriers to convey entanglement, a characteristic measure of nonlocal, quantum behavior. We then prove that there exists a local test that allows one to verify entanglement generation, falsifying our hypothesis. Crucially, we show that noise measurements can directly verify entanglement generation. This provides a step forward for a wide variety of experimental systems where traditional entanglement tests are challenging, including entanglement generation by gravity alone between macroscopic torsional oscillators.

  2. Dynamical friction force exerted on spherical bodies

    E-Print Network [OSTI]

    O. Esquivel; B. Fuchs

    2007-04-30T23:59:59.000Z

    We present a rigorous calculation of the dynamical friction force exerted on a spherical massive perturber moving through an infinite homogenous system of field stars. By calculating the shape and mass of the polarization cloud induced by the perturber in the background system, which decelerates the motion of the perturber, we recover Chandrasekhar's drag force law with a modified Coulomb logarithm. As concrete examples we calculate the drag force exerted on a Plummer sphere or a sphere with the density distribution of a Hernquist profile. It is shown that the shape of the perturber affects only the exact form of the Coulomb logarithm. The latter converges on small scales, because encounters of the test and field stars with impact parameters less than the size of the massive perturber become inefficient. We confirm this way earlier results based on the impulse approximation of small angle scatterings.

  3. Giant vacuum forces via transmission lines

    E-Print Network [OSTI]

    Ephraim Shahmoon; Igor Mazets; Gershon Kurizki

    2014-07-23T23:59:59.000Z

    Quantum electromagnetic fluctuations induce forces between neutral particles, known as the van der Waals (vdW) and Casimir interactions. These fundamental forces, mediated by virtual photons from the vacuum, play an important role in basic physics and chemistry, and in emerging technologies involving, e.g. micro-electromechanical systems or quantum information processing. Here we show that these interactions can be enhanced by many orders of magnitude upon changing the character of the mediating vacuum-modes. By considering two polarizable particles in the vicinity of any standard electric transmission line, along which photons can propagate in one dimension (1d), we find a much stronger and longer-range interaction than in free-space. This enhancement may have profound implications on many-particle and bulk systems, and impact the quantum technologies mentioned above. The predicted giant vacuum force is estimated to be measurable in a coplanar waveguide line.

  4. Spray bottle apparatus with force multiply pistons

    DOE Patents [OSTI]

    Eschbach, Eugene A. (Richland, WA)

    1992-01-01T23:59:59.000Z

    The present invention comprises a spray bottle in which the pressure resulting from the gripping force applied by the user is amplified and this increased pressure used in generating a spray such as an aerosol or fluid stream. In its preferred embodiment, the invention includes a high pressure chamber and a corresponding piston which is operative for driving fluid out of this chamber at high pressure through a spray nozzle and a low pressure chamber and corresponding piston which is acted upon by the hydraulic pressure within the bottle resulting from the gripping force. The low pressure chamber and piston are of larger size than the high pressure chamber and piston. The pistons are rigidly connected so that the force created by the pressure acting on the piston in the low pressure chamber is transmitted to the piston in the high pressure chamber where it is applied over a more limited area thereby generating greater hydraulic pressure for use in forming the spray.

  5. Trapping atoms using nanoscale quantum vacuum forces

    E-Print Network [OSTI]

    D. E. Chang; K. Sinha; J. M. Taylor; H. J. Kimble

    2013-10-22T23:59:59.000Z

    Quantum vacuum forces dictate the interaction between individual atoms and dielectric surfaces at nanoscale distances. For example, their large strengths typically overwhelm externally applied forces, which makes it challenging to controllably interface cold atoms with nearby nanophotonic systems. Here, we show that it is possible to tailor the vacuum forces themselves to provide strong trapping potentials. The trapping scheme takes advantage of the attractive ground state potential and adiabatic dressing with an excited state whose potential is engineered to be resonantly enhanced and repulsive. This procedure yields a strong metastable trap, with the fraction of excited state population scaling inversely with the quality factor of the resonance of the dielectric structure. We analyze realistic limitations to the trap lifetime and discuss possible applications that might emerge from the large trap depths and nanoscale confinement.

  6. Conference Discussion of the Nuclear Force

    SciTech Connect (OSTI)

    Franz Gross,Thomas D. Cohen,Evgeny Epelbaum,R. Machleidt

    2010-12-01T23:59:59.000Z

    Discussion of the nuclear force, lead by a round table consisting of T. Cohen, E. Epelbaum, R. Machleidt, and F. Gross (chair). After an invited talk by Machleidt, published elsewhere in these proceedings, brief remarks are made by Epelbaum, Cohen, and Gross, followed by discussion from the floor moderated by the chair. The chair asked the round table and the participants to focus on the following issues: (1)What does each approach (chiral effective field theory, large Nc, and relativistic phenomenology) contribute to our knowledge of the nuclear force? Do we need them all? Is any one transcendent? (2) How important for applications (few body, nuclear structure, EMC effect, for example) are precise fits to the NN data below 350 MeV? How precise do these fits have to be? (3) Can we learn anything about nonperturbative QCD from these studies of the nuclear force? The discussion presented here is based on a video recording made at the conference and transcribed afterward.

  7. Computing nonlinear force free coronal magnetic fields

    E-Print Network [OSTI]

    T. Wiegelmann; T. Neukirch

    2008-01-21T23:59:59.000Z

    Knowledge of the structure of the coronal magnetic field is important for our understanding of many solar activity phenomena, e.g. flares and CMEs. However, the direct measurement of coronal magnetic fields is not possible with present methods, and therefore the coronal field has to be extrapolated from photospheric measurements. Due to the low plasma beta the coronal magnetic field can usually be assumed to be approximately force free, with electric currents flowing along the magnetic field lines. There are both observational and theoretical reasons which suggest that at least prior to an eruption the coronal magnetic field is in a nonlinear force free state. Unfortunately the computation of nonlinear force free fields is way more difficult than potential or linear force free fields and analytic solutions are not generally available. We discuss several methods which have been proposed to compute nonlinear force free fields and focus particularly on an optimization method which has been suggested recently. We compare the numerical performance of a newly developed numerical code based on the optimization method with the performance of another code based on an MHD relaxation method if both codes are applied to the reconstruction of a semi-analytic nonlinear force-free solution. The optimization method has also been tested for cases where we add random noise to the perfect boundary conditions of the analytic solution, in this way mimicking the more realistic case where the boundary conditions are given by vector magnetogram data. We find that the convergence properties of the optimization method are affected by adding noise to the boundary data and we discuss possibilities to overcome this difficulty.

  8. Modulational instability in wind-forced waves

    E-Print Network [OSTI]

    Brunetti, Maura

    2014-01-01T23:59:59.000Z

    We consider the wind-forced nonlinear Schroedinger (NLS) equation obtained in the potential flow framework when the Miles growth rate is of the order of the wave steepness. In this case, the form of the wind-forcing terms gives rise to the enhancement of the modulational instability and to a band of positive gain with infinite width. This regime is characterised by the fact that the ratio between wave momentum and norm is not a constant of motion, in contrast to what happens in the standard case where the Miles growth rate is of the order of the steepness squared.

  9. Dynamics of the Thermohaline Circulation under Wind Forcing

    E-Print Network [OSTI]

    Dynamics of the Thermohaline Circulation under Wind Forcing Hongjun Gao and Jinqiao Duan ¡ 1 external wind forcing. We show that, when there is no wind forcing, the stream function and the density. With rapidly oscillating wind forcing, we obtain an averaging principle for the thermohaline circulation model

  10. Dynamics of the Thermohaline Circulation under Wind Forcing

    E-Print Network [OSTI]

    Dynamics of the Thermohaline Circulation under Wind Forcing Hongjun Gao 1 and Jinqiao Duan 2 1 external wind forcing. We show that, when there is no wind forcing, the stream function and the density. With rapidly oscillating wind forcing, we obtain an averaging principle for the thermohaline circulation model

  11. NON-DOUBLE-COUPLE EARTHQUAKES: NET FORCES AND UNCERTAINTIES

    E-Print Network [OSTI]

    Foulger, G. R.

    NON-DOUBLE-COUPLE EARTHQUAKES: NET FORCES AND UNCERTAINTIES G.R. Foulger, B.R. Julian University-980) to include net forces in the mechanisms. Net forces are theoretically required to describe earthquakes) waves cannot resolve sources such as vertical dipoles. When source mechanisms include net forces, even

  12. Characterization of acoustically forced swirl flame dynamics

    E-Print Network [OSTI]

    Lieuwen, Timothy C.

    of the flame to acoustic excitation is required. This study presents an analysis of phase-locked OH PLIF images of acoustically excited swirl flames, to identify the key controlling physical processes and qualitatively discuss, and whose relative significance depends upon forcing frequency, amplitude of excitation, and flame

  13. Self-force approach for radiation reaction

    E-Print Network [OSTI]

    Lior M. Burko

    1999-12-13T23:59:59.000Z

    We overview the recently proposed mode-sum regularization prescription (MSRP) for the calculation of the local radiation-reaction forces, which are crucial for the orbital evolution of binaries. We then describe some new results which were obtained using MSRP, and discuss their importance for gravitational-wave astronomy.

  14. Columbia University Network Integration Task Force

    E-Print Network [OSTI]

    Yang, Junfeng

    Columbia University Network Integration Task Force Final Report II 30 January 1992 #12;1 TOWARDS A COMMON ADMINISTRATIVE AND ACADEMIC NETWORK AT COLUMBIA UNIVERSITY Columbia University's Administrative or terminal. 1.2. Executive Summary This report examines Columbia University's current academic

  15. U.S.Air Force Advanced Power

    E-Print Network [OSTI]

    Tractor · Robins AFB H2 Fuel Cell Forklift/Toolcat · Fisher-Tropsch Synthetic FuelTest · Robins E-85 Effort · Solar - Electric Drive U.S.Air Force Advanced PowerTechnology Office Our Customers TheWarfighter Homeland Defense RefuelerFuel Cell MB-4Fuel Cell Microgrid Hydrogen Refueling Station Renewable Wind Power Renewable Solar

  16. Academic Integrity Task Force Report Executive Summary

    E-Print Network [OSTI]

    Roy, Subrata

    . For a more comprehensive report of the findings as well as faculty suggestions for maintaining integrity1 Academic Integrity Task Force Report Executive Summary 11/22/11 INTRODUCTION CHARGE: To determine whether there is an issue with academic integrity at UF and, if so, to determine how widespread

  17. Dean's Task Force on Engineering Leadership

    E-Print Network [OSTI]

    Dean's Task Force on Engineering Leadership Education Final Report May 5, 2010 Doug Reeve (Chair, Membership 1. There is an Urgent Need for Engineering Le 2. Leadership Education ...8 Engineering Leaders. Capability and Compe Engineering Leadership 5 Curriculum Concepts Co-curricular Concepts Extra

  18. Galileon forces in the Solar System

    E-Print Network [OSTI]

    Melinda Andrews; Yi-Zen Chu; Mark Trodden

    2013-10-14T23:59:59.000Z

    We consider the challenging problem of obtaining an analytic understanding of realistic astrophysical dynamics in the presence of a Vainshtein screened fifth force arising from infrared modifications of General Relativity. In particular, we attempt to solve -- within the most general flat spacetime galileon model -- the scalar force law between well separated bodies located well within the Vainshtein radius of the Sun. To this end, we derive the exact static Green's function of the galileon wave equation linearized about the background field generated by the Sun, for the minimal cubic and maximally quartic galileon theories, and then introduce a method to compute the general leading order force law perturbatively away from these limits. We also show that the same nonlinearities which produce the Vainshtein screening effect present obstacles to an analytic calculation of the galileon forces between closely bound systems within the solar system, such as that of the Earth and Moon. Within the test mass approximation, we deduce that a large enough quartic galileon interaction would suppress the effect on planetary perihelion precession below the level detectable by even the next-generation experiments.

  19. Chiral effective field theory and nuclear forces

    E-Print Network [OSTI]

    R. Machleidt; D. R. Entem

    2011-05-15T23:59:59.000Z

    We review how nuclear forces emerge from low-energy QCD via chiral effective field theory. The presentation is accessible to the non-specialist. At the same time, we also provide considerable detailed information (mostly in appendices) for the benefit of researchers who wish to start working in this field.

  20. Strategic forces: Future requirements and options

    SciTech Connect (OSTI)

    Speed, R.D.

    1990-11-01T23:59:59.000Z

    In the wake of the collapse of the Warsaw Pact and the apparent ending of the Cold War, there have been renewed calls for radical cuts in US strategic forces to levels far below the 10,000 or so warheads allowed each side under the current START proposal. Since it now appears that NATO for the first time will have the capability to defeat a Soviet conventional attack without the necessity of threatening to resort to nuclear weapons, this should pave the way for the rethinking of US strategy and the reduction of US strategic weapons requirements. In this new environment, it seems plausible that, with a modification of the Flexible Response doctrine to forego attempts to disarm the Soviet Union, deterrence could be maintained with 1500 or so survivable strategic weapons. With a new strategy that confined US strategic weapons to the role of deterring the use of nuclear weapons by other countries, a survivable force of about 500 weapons would seem sufficient. With this premise, the implications for the US strategic force structure are examined for two cases: a treaty that allows each side 3000 warheads and one that allows each side 1000 warheads. In Part 1 of this paper, the weapons requirements for deterrence are examined in light of recent changes in the geopolitical environment. In Part 2, it is assumed that the President and Congress have decided that deep cuts in strategic forces are acceptable. 128 refs., 12 figs., 12 tabs. (JF)

  1. Fooling Mother Nature: Forcing Flower Bulbs

    E-Print Network [OSTI]

    Liskiewicz, Maciej

    Fooling Mother Nature: Forcing Flower Bulbs for Indoor Bloom by George Graine,Virginia Cooperative Bulbs for Indoor Bloom George Graine,Virginia Cooperative Extension Master Gardener, Fairfax County, VA Introduction Have you ever wondered if it is possible to enjoy the beauty of bulbs in the middle of winter

  2. Open Access Task Force Open Access to

    E-Print Network [OSTI]

    Jiang, Huiqiang

    Libraries Initiative launched by National Science Foundation; Social Sciences Research Network (SSRN Library System rgmiller@pitt.edu #12;Open Access Task Force Open Access is... · A family of copyright · The only constraint on reproduction and distribution, and the only role for copyright in this domain

  3. Yangtze Patrol: American Naval Forces in China

    E-Print Network [OSTI]

    Yangtze Patrol: American Naval Forces in China A Selected, Partially-Annotated Bibliography literature of the United States Navy in China. mvh #12;"Like Chimneys in Summer" The thousands of men who served on the China Station before World War II have been all but forgotten, except in the mythology

  4. Chiral lagrangians and few-nucleon forces

    SciTech Connect (OSTI)

    van Kolck, U. [Department of Physics, FM-15, University of Washington, Seattle, Washington 98195 (United States)

    1995-05-10T23:59:59.000Z

    Some of the implications of chiral symmetry to nuclear forces are considered. The few-nucleon potential is shown to be naturally weaker than the leading pieces of the two-nucleon potential, but comparable to other important features of the latter. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.

  5. Audit Report on "Management Controls over the Department's Excess Weapons Inventories and Selected Sensitive Equipment used by Protective Forces"

    SciTech Connect (OSTI)

    None

    2009-01-01T23:59:59.000Z

    Since September 11, 2001, the Department of Energy has, on several occasions, revised its security posture based on identified threats and adversaries. These revisions in security posture have driven Departmental sites to upgrade their defensive and tactical equipment. Subsequent changes in the perceived threats have, in some cases, led to a reduction in the need for certain types of weapons, thus creating a pool of surplus equipment. These surplus weapons could potentially be used by other Department sites and Federal law enforcement agencies. Recent Office of Inspector General reports have raised concerns with the adequacy of controls related to defensive and tactical equipment. For example, our report on Management Controls Over Defense Related High Risk Property (OAS-M-08-06, April 2008) found that administrative controls over certain defense related high risk property were not sufficient for providing accountability over these items. Because of prior reported weaknesses in controls over defensive and tactical equipment, we initiated this audit to determine whether the Department and its contractors were properly managing excess weapons inventories and selected sensitive equipment used by protective forces. Our review disclosed that the Department was not always properly managing its inventories of excess weapons and selected sensitive equipment. We identified issues with the retention of unneeded weapons at many locations and with the identification and tracking of sensitive items. More specifically: Sites maintained large inventories of weapons that were no longer needed but had not been made available for use by either other Departmental sites or other Federal law enforcement agencies. For instance, at six of the locations included in our review we identified a total of 2,635 unneeded weapons with a total acquisition value of over $2.8 million that had not been officially declared as excess - an action that would have made them available for others to use. In addition; Sites were not always identifying, tracking and properly disposing of potentially high risk and sensitive equipment. In particular, we identified control weaknesses in this area related to weapons sights and scopes. These issues occurred because the Department did not have processes in place to properly manage excess inventories of weapons. In particular, the Department does not have requirements for ensuring timely declaration of excess weapons. Additionally, certain sites indicated that they were unwilling to give up excess weapons because of the possibility that they may be needed in the future. However, other sites had a need for some of these weapons and could have avoided purchasing them had they been made available through the excess screening process. Also, we found that the Department lacks clear guidance on the identification of high risk/sensitive equipment. Except for immaterial differences, we were able to locate and verify accountability over the items of defensive and tactical equipment we selected for review. Specifically, we took statistical samples of weapons, ammunition, and other related equipment and were able to verify their existence. While these accountability measures were noteworthy, additional action is necessary to strengthen controls over weapon and sensitive equipment management. Untimely declaration of excess weapons may result in an inefficient use of scarce Government resources. Similarly, if selected high risk/sensitive equipment is not properly categorized and tracked, accountability issues may occur. To address these issues, we made recommendations aimed at improving the management of these categories of defensive and tactical equipment.

  6. Repulsive and restoring Casimir forces with left-handed materials

    E-Print Network [OSTI]

    Yaping Yang; Ran Zeng; Shutian Liu; Hong Chen; Shiyao Zhu

    2008-03-24T23:59:59.000Z

    We investigate repulsive Casimir force between slabs containing left-handed materials with controllable electromagnetic properties. The sign of Casimir force is determined by the electric and magnetic properties of the materials, and it is shown that the formation of the repulsive force is related to the wave impedances of two slabs. The sign change of the Casimir force as a function of the distance is studied. Special emphasis is put on the restoring Casimir force which may be found to exist between perfectly conducting material and metamaterial slabs. This restoring force is a natural power for the system oscillation in vacuum and also can be used for system stabilization.

  7. Friction forces on phase transition fronts

    E-Print Network [OSTI]

    Ariel Megevand

    2013-03-31T23:59:59.000Z

    In cosmological first-order phase transitions, the microscopic interaction of the phase transition fronts with non-equilibrium plasma particles manifests itself macroscopically as friction forces. In general, it is a nontrivial problem to compute these forces, and only two limits have been studied, namely, that of very slow walls and, more recently, ultra-relativistic walls which run away. In this paper we consider ultra-relativistic velocities and show that stationary solutions still exist when the parameters allow the existence of runaway walls. Hence, we discuss the necessary and sufficient conditions for the fronts to actually run away. We also propose a phenomenological model for the friction, which interpolates between the non-relativistic and ultra-relativistic values. Thus, the friction depends on two friction coefficients which can be calculated for specific models. We then study the velocity of phase transition fronts as a function of the friction parameters, the thermodynamic parameters, and the amount of supercooling.

  8. Friction forces on atoms after acceleration

    E-Print Network [OSTI]

    Francesco Intravaia; Vanik E. Mkrtchian; Stefan Buhmann; Stefan Scheel; Diego A. R. Dalvit; Carsten Henkel

    2015-02-04T23:59:59.000Z

    The aim of this paper is to revisit the calculation of atom-surface quantum friction in the quantum field theory formulation put forward by Barton [New J. Phys. 12 (2010) 113045]. We show that the power dissipated into field excitations and the associated friction force depend on how the atom is boosted from being initially at rest to a configuration in which it is moving at constant velocity (v) parallel to the planar interface. In addition, we point out that there is a subtle cancellation between the one-photon and part of the two-photon dissipating power, resulting in a leading order contribution to the frictional power which goes as v^4. These results are also confirmed by an alternative calculation of the average radiation force, which scales as v^3.

  9. 3-D Force-balanced Magnetospheric Configurations

    SciTech Connect (OSTI)

    Sorin Zaharia; C.Z. Cheng; K. Maezawa

    2003-02-10T23:59:59.000Z

    The knowledge of plasma pressure is essential for many physics applications in the magnetosphere, such as computing magnetospheric currents and deriving magnetosphere-ionosphere coupling. A thorough knowledge of the 3-D pressure distribution has however eluded the community, as most in-situ pressure observations are either in the ionosphere or the equatorial region of the magnetosphere. With the assumption of pressure isotropy there have been attempts to obtain the pressure at different locations by either (a) mapping observed data (e.g., in the ionosphere) along the field lines of an empirical magnetospheric field model or (b) computing a pressure profile in the equatorial plane (in 2-D) or along the Sun-Earth axis (in 1-D) that is in force balance with the magnetic stresses of an empirical model. However, the pressure distributions obtained through these methods are not in force balance with the empirical magnetic field at all locations. In order to find a global 3-D plasma pressure distribution in force balance with the magnetospheric magnetic field, we have developed the MAG-3D code, that solves the 3-D force balance equation J x B = (upside-down delta) P computationally. Our calculation is performed in a flux coordinate system in which the magnetic field is expressed in terms of Euler potentials as B = (upside-down delta) psi x (upside-down delta) alpha. The pressure distribution, P = P(psi,alpha), is prescribed in the equatorial plane and is based on satellite measurements. In addition, computational boundary conditions for y surfaces are imposed using empirical field models. Our results provide 3-D distributions of magnetic field and plasma pressure as well as parallel and transverse currents for both quiet-time and disturbed magnetospheric conditions.

  10. Exploring medium effects on the nuclear force

    SciTech Connect (OSTI)

    F. Sammarruca

    2004-04-18T23:59:59.000Z

    This STI product contains a description of results from theoretical studies in nuclear physics. The goal is a systematic investigation of the nuclear force in the nuclear medium. The problems addressed are: density-dependent effective interactions as seen through proton-nucleus reactions, nuclear matter with unequal densities of protons and neutrons, applications to asymmetric nuclei through predictions of neutron radii and neutron skins.

  11. Entropic-force dark energy reconsidered

    E-Print Network [OSTI]

    Spyros Basilakos; Joan Sola

    2014-05-21T23:59:59.000Z

    We reconsider the entropic-force model in which both kind of Hubble terms ${\\dot H}$ and $H^{2}$ appear in the effective dark energy (DE) density affecting the evolution of the main cosmological functions, namely the scale factor, deceleration parameter, matter density and growth of linear matter perturbations. However, we find that the entropic-force model is not viable at the background and perturbation levels due to the fact that the entropic formulation does not add a constant term in the Friedmann equations. On the other hand, if on mere phenomenological grounds we replace the ${\\dot H}$ dependence of the effective DE density with a linear term $H$ without including a constant additive term, we find that the transition from deceleration to acceleration becomes possible but the recent structure formation data strongly disfavors this cosmological scenario. Finally, we briefly compare the entropic-force models with some related DE models (based on dynamical vacuum energy) which overcome these difficulties and are compatible with the present observations.

  12. Squeeze bottle apparatus with force multiplying pistons

    DOE Patents [OSTI]

    Moss, Owen R. (Cary, NC); Gordon, Norman R. (Kennewick, WA); DeFord, Henry S. (Kennewick, WA); Eschbach, Eugene A. (Richland, WA)

    1994-01-01T23:59:59.000Z

    The present invention comprises a spray bottle in which the pressure resulting from the gripping force applied by the user is amplified and this increased pressure used in generating a spray such as an aerosol or fluid stream. In its preferred embodiment, the invention includes a high pressure chamber and a corresponding piston which is operative for driving fluid out of this chamber at high pressure through a spray nozzle and a low pressure chamber, and a corresponding piston which is acted upon by the hydraulic pressure within the bottle resulting from the gripping force. The low pressure chamber and piston are of larger size than the high pressure chamber and piston. The pistons are rigidly connected so that the force created by the pressure acting on the piston in the low pressure chamber is transmitted to the piston in the high pressure chamber where it is applied over a more limited area, thereby generating greater hydraulic pressure for use in forming the spray.

  13. Forced cooling of underground electric power transmission lines : design manual

    E-Print Network [OSTI]

    Brown, Jay A.

    1978-01-01T23:59:59.000Z

    The methodology utilized for the design of a forced-cooled pipe-type underground transmission system is presented. The material is divided into three major parts: (1) The Forced-cooled Pipe-Type Underground Transmission ...

  14. UNITED STATES AIR FORCE OUTSIDE THE NATIONAL CAPITAL REGION

    E-Print Network [OSTI]

    program in order to reduce Federal employee's contribution to traffic congestion and air pollutionUNITED STATES AIR FORCE OUTSIDE THE NATIONAL CAPITAL REGION PUBLIC TRANSPORTATION BENEFIT PROGRAM): ____________ City (Residence): __________________________State: _______________ Zip Code: ________________ Air Force

  15. REPORT OF THE TASK FORCE ON NUCLEAR NONPROLIFERATION

    Broader source: Energy.gov [DOE]

    The Secretary of Energy on December 20, 2013 established the Secretary of Energy Advisory Board (SEAB) Task Force on Nuclear Nonproliferation and charged the Task Force to advise the DOE on future areas of emphasis for its nuclear nonproliferation activities

  16. Transmission Services WIST Task Force Dynamic Transfer Capability...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    WIST Task Force Dynamic Transfer Capability Report - Phase I BPA is an active participant in the Wind Integration Study Team (WIST), especially the Task Force looking at DTC study...

  17. air force family: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    10spintronics-discover-could-lead-to- magnetic-batteries.php Applica'ons Motors Transformers MRI current element Forces on a Charge EQFe Analogous to the electric force: We...

  18. Natural Heritage Inventory of Schriever Air Force Base,

    E-Print Network [OSTI]

    Natural Heritage Inventory of Schriever Air Force Base, El Paso County, Colorado Colorado Natural-491-1309 July 2000 #12;Natural Heritage Inventory of Schriever Air Force Base, El Paso County, Colorado Prepared

  19. Buoyant plumes with inertial and chemical reaction-driven forcing

    E-Print Network [OSTI]

    Morris, Stephen W.

    . The forced plumes were compositionally buoy- ant and were injected with inertial forcing into a fluid filled power law relationship that explains their ascent velocity. However, the morphology of the plume heads

  20. Gregory H. Friedman: Before the Subcommittee on Strategic Forces...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Strategic Forces Committee on Armed Services U.S. House of Representatives Gregory H. Friedman: Before the Subcommittee on Strategic Forces Committee on Armed Services U.S. House...

  1. Nellis Air Force Base solar array provides model for renewable...

    Broader source: Energy.gov (indexed) [DOE]

    Nellis Air Force Base solar array provides model for renewable projects Nellis Air Force Base solar array provides model for renewable projects March 24, 2010 - 4:58pm Addthis The...

  2. air force systems: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of a piece of equipment that provides the heating energy (the furnace, boiler or heat pump) and the method used 10 U.S. Air Force Fact Sheet Air Force Reserve Officer...

  3. Magnetic nanowire based high resolution magnetic force microscope probes

    E-Print Network [OSTI]

    Qin, Lu-Chang

    -resolution magnetic force microscope probes using preformed magnetic nanowires. Nickel and cobalt nanowires produced by electrodeposition were directly assembled onto the tip of a commercial atomic force microscope cantilever

  4. Annual report on contractor work force restructuring, fiscal year 1997

    SciTech Connect (OSTI)

    NONE

    1998-03-01T23:59:59.000Z

    This report summarizes work force restructuring and community transition activities at all sites. It outlines work force restructuring activity for FY 1997, changing separation patterns, cost savings and separation costs, program assessment, activities to mitigate restructuring impacts, community transition activities, status of displaced workers, lessons learned, and emerging issues in worker and community transition. Work force restructuring and community transition activities for defense nuclear sites are summarized, as are work force restructuring activities at non-defense sites.

  5. Role of seepage forces on hydraulic fracturing and failure patterns

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Role of seepage forces on hydraulic fracturing and failure patterns Alexander Rozhko Thesis September 2007 #12;ii Role of seepage forces on hydraulic fracturing and failure patterns Abstract. The mechanical role of seepage forces on hydraulic fracturing and failure patterns was studied both

  6. The driving force of plate tectonics evaluated in spherical coordinates

    E-Print Network [OSTI]

    Donahue, John Michael

    1985-01-01T23:59:59.000Z

    &' + Ri according to the force balance equation of Garison et al (1983) . The age weighting for a ridge-push driving force model is only the age, t. 13 magnetic linea tio ns I subduction boundary force vector FIG. 4. Trench segmentation scheme. I...

  7. Enhancing Optical Gradient Forces with Metamaterials Vincent Ginis,1

    E-Print Network [OSTI]

    Enhancing Optical Gradient Forces with Metamaterials Vincent Ginis,1 Philippe Tassin,2,* Costas M demonstrate how the optical gradient force between two waveguides can be enhanced using transformation optics perceived by light, resulting in a more than tenfold enhancement of the optical force. This process

  8. CONSERVED INTEGRALS AND ENERGETIC FORCES JAMES R. RICE

    E-Print Network [OSTI]

    and the structure of inealstic constitutive relations; they also include some new results on the energetic forcesCONSERVED INTEGRALS AND ENERGETIC FORCES JAMES R. RICE Harvard University, Cambridge, MA 02138, USA ABSTRACT Conserved integrals of the Eshelby type representing energetic forces on dislocations, inclusions

  9. Comparison of Ornithopter Wind Tunnel Force Measurements with Free Flight

    E-Print Network [OSTI]

    Fearing, Ron

    Comparison of Ornithopter Wind Tunnel Force Measurements with Free Flight Cameron Rose and Ronald S flight force model from wind tunnel data is a practical approach. In this work, we compare the flight, to measured wind tunnel force and moment values. We compare the two data sets at equilibrium as a metric

  10. Measurement of friction coefficients with the atomic force microscope

    E-Print Network [OSTI]

    Attard, Phil

    Measurement of friction coefficients with the atomic force microscope Phil Attard1, Johanna axial method for measuring the friction coefficient with the atomic force microscope is given measurement by measuring the difference between the constant compliance slopes of the extend and retract force

  11. Heat release response of acoustically forced turbulent premixed flamesrole

    E-Print Network [OSTI]

    Lieuwen, Timothy C.

    Heat release response of acoustically forced turbulent premixed flames­role of kinematic surface to coherent forcing and turbulent fluctuations are coupled even at linear order in coherent forcing amplitude, ea, due to flame propagation (kinematic restoration). This coupling effectively causes

  12. ADHESION FORCES BETWEEN MICA SURFACES IN UNDERSATURATED VAPORS OF HYDROCARBONS

    E-Print Network [OSTI]

    Matsuoka, Hiroshige

    ADHESION FORCES BETWEEN MICA SURFACES IN UNDERSATURATED VAPORS OF HYDROCARBONS H. MATSUOKA1 , T] or meniscus force [3], which have been neglected in the conventional and relatively large mechani- cal systems forces between mica surfaces in under- saturated vapors of several kind of hydrocarbon liquids are mea

  13. US Air Force Facility Energy Management Program - How Industry Can Help the Air Force Meet Its Objectives

    E-Print Network [OSTI]

    Holden, P. C.; Kroop, R. H.

    1983-01-01T23:59:59.000Z

    This paper describes the Air Force's facility energy management program including how industry can help the Air Force meet its facility energy objectives. Background information on energy use and energy conservation efforts are presented to give...

  14. Laser interferometry force-feedback sensor for an interfacial force microscope

    DOE Patents [OSTI]

    Houston, Jack E.; Smith, William L.

    2004-04-13T23:59:59.000Z

    A scanning force microscope is provided with a force-feedback sensor to increase sensitivity and stability in determining interfacial forces between a probe and a sample. The sensor utilizes an interferometry technique that uses a collimated light beam directed onto a deflecting member, comprising a common plate suspended above capacitor electrodes situated on a substrate forming an interference cavity with a probe on the side of the common plate opposite the side suspended above capacitor electrodes. The probe interacts with the surface of the sample and the intensity of the reflected beam is measured and used to determine the change in displacement of the probe to the sample and to control the probe distance relative to the surface of the sample.

  15. ARM - Midlatitude Continental Convective Clouds - Single Column Model Forcing (xie-scm_forcing)

    SciTech Connect (OSTI)

    Xie, Shaocheng; McCoy, Renata; Zhang, Yunyan

    2012-10-25T23:59:59.000Z

    The constrained variational objective analysis approach described in Zhang and Lin [1997] and Zhang et al. [2001]was used to derive the large-scale single-column/cloud resolving model forcing and evaluation data set from the observational data collected during Midlatitude Continental Convective Clouds Experiment (MC3E), which was conducted during April to June 2011 near the ARM Southern Great Plains (SGP) site. The analysis data cover the period from 00Z 22 April - 21Z 6 June 2011. The forcing data represent an average over the 3 different analysis domains centered at central facility with a diameter of 300 km (standard SGP forcing domain size), 150 km and 75 km, as shown in Figure 1. This is to support modeling studies on various-scale convective systems.

  16. ARM - Midlatitude Continental Convective Clouds - Single Column Model Forcing (xie-scm_forcing)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    Xie, Shaocheng; McCoy, Renata; Zhang, Yunyan

    The constrained variational objective analysis approach described in Zhang and Lin [1997] and Zhang et al. [2001]was used to derive the large-scale single-column/cloud resolving model forcing and evaluation data set from the observational data collected during Midlatitude Continental Convective Clouds Experiment (MC3E), which was conducted during April to June 2011 near the ARM Southern Great Plains (SGP) site. The analysis data cover the period from 00Z 22 April - 21Z 6 June 2011. The forcing data represent an average over the 3 different analysis domains centered at central facility with a diameter of 300 km (standard SGP forcing domain size), 150 km and 75 km, as shown in Figure 1. This is to support modeling studies on various-scale convective systems.

  17. Coke cake behavior under compressive forces

    SciTech Connect (OSTI)

    Watakabe, S.; Takeda, T.; Itaya, H.; Suginobe, H.

    1997-12-31T23:59:59.000Z

    The deformation of the coke cake and load on the side wall during pushing were studied using an electric furnace equipped with a movable wall. Coke cake was found to deform in three stages under compressive forces. The coke cake was shortened in the pushing direction in the cake deformation stage, and load was generated on the side walls in the high wall load stage. Secondary cracks in the coke cake were found to prevent load transmission on the wall. The maximum load transmission rate was controlled by adjusting the maximum fluidity and mean reflectance of the blended coal.

  18. EPA may force scrubbers on industry boilers

    SciTech Connect (OSTI)

    Hume, M.

    1985-05-13T23:59:59.000Z

    An Environmental Protection Agency (EPA) proposal requiring scrubber standards for industrial energy users will force industry to invest in the costly pollution control equipment used mostly by utilities today. The New Source Performance Standards (NSPS) for sulfur dioxide emissions will require either scrubbing or fluidized-bed combustion regardless of the fuel's sulfur content. Protests from the Council of Industrial Boiler Owners that this is an unfair burden on non-utility boilers note that scrubbing is more costly for smaller boilers, and that it could impede air quality improvement by discouraging the replacement of old boilers. EPA contests these claims.

  19. 136Sn and three body forces

    E-Print Network [OSTI]

    M. Saha Sarkar; S. Sarkar

    2014-11-10T23:59:59.000Z

    New experimental data on 2+ energies of 136,138Sn confirms the trend of lower 2+ excitation energies of even-even tin isotopes with N > 82 compared to those with N 4+)) of these nuclei, simultaneously, apart from one whose matrix elements have been changed empirically to produce mixed seniority states by weakening pairing. We have shown that the experimental result also shows good agreement with the theory in which three body forces have been included in a realistic interaction. The new theoretical results on transition probabilities have been discussed to identify the experimental quantities which will clearly distinguish between different views.

  20. Force 9 Energy | Open Energy Information

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are being directedAnnual SiteofEvaluating A PotentialJumpGermanFife Energy Park atFisiaFlorida: EnergyFlyingForbesForce

  1. Hickam Air Force Base | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels DataDepartment of Energy Your Density Isn't YourTransport(Fact Sheet), GeothermalGridHYDROGEN TOTechnology Validation » Hickam Air Force

  2. Force generation by Myosin II Filaments in Compliant Networks

    E-Print Network [OSTI]

    Samantha Stam; Jon Alberts; Margaret L. Gardel; Edwin Munro

    2014-07-08T23:59:59.000Z

    Myosin II isoforms with varying mechanochemistry and filament size interact with filamentous actin (F-actin) networks to generate contractile forces in cells. How their properties control force production in environments with varying stiffness is poorly understood. Here, we incorporated literature values for properties of myosin II isoforms into a cross-bridge model. Similar actin gliding speeds and force-velocity curves expected from previous experiments were observed. Motor force output on an elastic load was regulated by two timescales--that of their attachment to F-actin, which varied sharply with the ensemble size, motor duty ratio, and external load, and that of force build up, which scaled with ensemble stall force, gliding speed, and load stiffness. While such regulation did not require force-dependent kinetics, the myosin catch bond produced positive feedback between attachment time and force to trigger switch-like transitions from short attachments and small forces to high force-generating runs at threshold parameter values. Parameters representing skeletal muscle myosin, non-muscle myosin IIB, and non-muscle myosin IIA revealed distinct regimes of behavior respectively: (1) large assemblies of fast, low-duty ratio motors rapidly build stable forces over a large range of environmental stiffness, (2) ensembles of slow, high-duty ratio motors serve as high-affinity cross-links with force build-up times that exceed physiological timescales, and (3) small assemblies of low-duty ratio motors operating at intermediate speeds may respond sharply to changes in mechanical context--at low forces or stiffness, they serve as low affinity cross-links but they can transition to effective force production via the positive feedback mechanism described above. These results reveal how myosin isoform properties may be tuned to produce force and respond to mechanical cues in their environment.

  3. Tunable polarity of the Casimir force based on saturated ferrites

    SciTech Connect (OSTI)

    Zeng Ran [School of Telecommunication, Hangzhou Dianzi University, Hangzhou 310018 (China); Yang Yaping [Department of Physics, Tongji University, Shanghai 200092 (China); Beijing Computational Science Research Center, Beijing 100084 (China)

    2011-01-15T23:59:59.000Z

    We study the polarity of the Casimir force between two different parallel slabs separated by vacuum when the saturated ferrite materials under the influence of an external magnetic field are taken into consideration. Between the ordinary dielectric slab and the ferrite slab, repulsive Casimir force may be observed by adjusting the applied magnetic field. For the ferrite material, we consider the frequency dependence of the permeability modified by the external magnetic field to analyze the formation of the repulsive Casimir force. The restoring force, which means the transition of the force polarity from repulsion to attraction with the increasing slab separation, can also be obtained between two different ferrite slabs.

  4. Vacuum Energy and Repulsive Casimir Forces in Quantum Star Graphs

    E-Print Network [OSTI]

    S. A. Fulling; L. Kaplan; J. H. Wilson

    2007-03-27T23:59:59.000Z

    Casimir pistons are models in which finite Casimir forces can be calculated without any suspect renormalizations. It has been suggested that such forces are always attractive, but we present several counterexamples, notably a simple type of quantum graph in which the sign of the force depends upon the number of edges. We also show that Casimir forces in quantum graphs can be reliably computed by summing over the classical orbits, and study the rate of convergence of the periodic orbit expansion. In generic situations where no analytic expression is available, the sign and approximate magnitude of Casimir forces can often be obtained using only the shortest classical orbits.

  5. Casimir Friction Force for Moving Harmonic Oscillators

    E-Print Network [OSTI]

    Johan S. Høye; Iver Brevik

    2011-11-21T23:59:59.000Z

    Casimir friction is analyzed for a pair of dielectric particles in relative motion. We first adopt a microscopic model for harmonically oscillating particles at finite temperature T moving non-relativistically with constant velocity. We use a statistical-mechanical description where time-dependent correlations are involved. This description is physical and direct, and, in spite of its simplicity, is able to elucidate the essentials of the problem. This treatment elaborates upon, and extends, an earlier theory of ours back in 1992. The energy change Delta E turns out to be finite in general, corresponding to a finite friction force. In the limit of zero temperature the formalism yields, however, Delta E ->0, this being due to our assumption about constant velocity, meaning slowly varying coupling. For couplings varying more rapidly, there will also be a finite friction force at T=0. As second part of our work, we consider the friction problem using time-dependent perturbation theory. The dissipation, basically a second order effect, is obtainable with the use of first order theory, the reason being the absence of cross terms due to uncorrelated phases of eigenstates. The third part of the present paper is to demonstrate explicitly the equivalence of our results with those recently obtained by Barton (2010); this being not a trivial task since the formal results are seemingly quite different from each other.

  6. Force budget: I. Theory and numerical methods

    E-Print Network [OSTI]

    van der Veen, Cornelis J.; Whillans, I. M.

    1989-10-05T23:59:59.000Z

    ,y) and vertical (z). Balance of forces is expressed by: 8 h- J Rxxdz8x b ~ 8 h ~ Rxx(h)- + - J Rxydz - Rxy(h)-8 +8x 8y yb (11 ) 8C1XX 8C1xy 8C1xz + + 0 (1)8x 8y 8z 8C1xy 8C1yy 8C1yz 0 (2)+ +8x 8y 8z 8 h 8x J Rxydz b (12) 8C1XZ 8C1yz 8C1ZZ + + ---- - pg = 0 (3)8x 8... are small compared to pg. This is satisfied if 8Rxz/ax = aC1xz/aX * 0 and 8Ryz/ay = aC1yz/ay * O.When the balance equations are solved numerically, this approximation is not necessary, and the value of Rzz can be obtained from Equation (3) for vertical force...

  7. Softening of Granular Packings with Dynamic Forcing

    E-Print Network [OSTI]

    C. J. Olson Reichhardt; L. M. Lopatina; X. Jia; P. A. Johnson

    2014-06-17T23:59:59.000Z

    We perform numerical simulations of a two-dimensional bidisperse granular packing subjected to both a static confining pressure and a sinusoidal dynamic forcing applied by a wall on one edge of the packing. We measure the response experienced by a wall on the opposite edge of the packing and obtain the resonant frequency of the packing as the static or dynamic pressures are varied. Under increasing static pressure, the resonant frequency increases, indicating a velocity increase of elastic waves propagating through the packing. In contrast, when the dynamic amplitude is increased for fixed static pressure, the resonant frequency decreases, indicating a decrease in the wave velocity. This occurs both for compressional and for shear dynamic forcing, and is in agreement with experimental results. We find that the average contact number $Z_c$ at the resonant frequency decreases with increasing dynamic amplitude, indicating that the elastic softening of the packing is associated with a reduced number of grain-grain contacts through which the elastic waves can travel. We image the excitations created in the packing and show that there are localized disturbances or soft spots that become more prevalent with increasing dynamic amplitude. Our results are in agreement with experiments on glass bead packings and earth materials such as sandstone and granite, and may be relevant to the decrease in elastic wave velocities that has been observed to occur near fault zones after strong earthquakes, in surficial sediments during strong ground motion, and in structures during earthquake excitation.

  8. Spin-Orbit Force from Lattice QCD

    E-Print Network [OSTI]

    K. Murano; N. Ishii; S. Aoki; T. Doi; T. Hatsuda; Y. Ikeda; T. Inoue; H. Nemura; K. Sasaki

    2014-06-19T23:59:59.000Z

    We present a first attempt to determine nucleon-nucleon potentials in the parity-odd sector, which appear in 1P1, 3P0, 3P1, 3P2-3F2 channels, in Nf=2 lattice QCD simulations. These potentials are constructed from the Nambu-Bethe-Salpeter wave functions for J^P=0^-, 1^- and 2^-, which correspond to A1^-, T1^- and T2^- + E^- representation of the cubic group, respectively. We have found a large and attractive spin-orbit potential VLS(r) in the isospin-triplet channel, which is qualitatively consistent with the phenomenological determination from the experimental scattering phase shifts. The potentials obtained from lattice QCD are used to calculate the scattering phase shifts in 1P1, 3P0, 3P1 and 3P2-3F2 channels. The strong attractive spin-orbit force and a weak repulsive central force in spin-triplet P-wave channels lead to an attraction in the 3P2 channel, which is related to the P-wave neutron paring in neutron stars.

  9. Self force on an accelerated particle

    E-Print Network [OSTI]

    Thomas M. Linz; John L. Friedman; Alan G. Wiseman

    2014-04-28T23:59:59.000Z

    We calculate the singular field of an accelerated point particle (scalar charge, electric charge or small gravitating mass) moving on an accelerated (non-geodesic) trajectory in a generic background spacetime. Using a mode-sum regularization scheme, we obtain explicit expressions for the self-force regularization parameters. In the electromagnetic and gravitational case, we use a Lorenz gauge. This work extends the work of Barack and Ori [1] who demonstrated that the regularization parameters for a point particle in geodesic motion in a Schwarzschild spacetime can be described solely by the leading and subleading terms in the mode-sum (commonly known as the $A$ and $B$ terms) and that all terms of higher order in $\\ell$ vanish upon summation (later they showed the same behavior for geodesic motion in Kerr [2], [3]). We demonstrate that these properties are universal to point particles moving through any smooth spacetime along arbitrary (accelerated) trajectories. Our renormalization scheme is based on, but not identical to, the Quinn-Wald axioms. As we develop our approach, we review and extend work showing that that different definitions of the singular field used in the literature are equivalent to our approach. Because our approach does not assume geodesic motion of the perturbing particle, we are able use our mode-sum formalism to explicitly recover a well-known result: The self-force on static scalar charges near a Schwarzschild black hole vanishes.

  10. The Role of Quantum Vacuum Forces in Microelectromechanical Systems

    E-Print Network [OSTI]

    G. Jordan Maclay

    2006-08-22T23:59:59.000Z

    The presence of boundary surfaces in the vacuum alters the ground state of the quantized electromagnetic field and can lead to the appearance of vacuum forces. In the last decade, landmark measurements of the vacuum stress between conducting uncharged parallel plates (Casimir force) have been made. Recently the first micromachined MEMS (microelectromechanical system) device was fabricated that utilizes the Casimir force between parallel plates. The force dependence allows the device to serve as a highly sensitive position sensor. The are many other examples of quantum vacuum forces and effects besides the well known parallel plate Casimir force. Here we discuss potential roles of quantum vacuum forces and effects in MEMS systems and other systems. With the growing capability in nanofabrication, some of the roles may be actualized in the future. Because of the computational complexity, no theoretical results are yet available for a number of potentially interesting geometries and we can only speculate.

  11. Centrifugal cosmological repulsive force in a homogeneous universe

    E-Print Network [OSTI]

    A. V. Klimenko; V. A. Klimenko

    2011-03-21T23:59:59.000Z

    We study the dynamics of homogeneous isotropic three-dimensional worlds filled with radiation (3R-worlds). It is shown that the dynamics of these worlds with the additional fourth large-scale spatial dimension leads to an important effect. At 3R-worlds the forces of repulsion appear. The source of these forces is the thermal energy of the radiation that fills these worlds. In the four-dimensional space, these forces are centrifugal. They operate in an external for 3R-world spatial dimension and stretch it. In the three-dimensional comoving coordinate system the centrifugal forces shows themselves as forces of repulsion. Standard Einstein's equations do not describe these forces. Written generalized Einstein's equation describing the dynamics of a homogeneous isotropic universe, taking into consideration the centrifugal forces of repulsion. We propose a cosmological model of the universe, based on these equations. This model apply to explain the observation data.

  12. Total aerosol effect: forcing or radiative flux perturbation?

    SciTech Connect (OSTI)

    Lohmann, Ulrike; Storelvmo, Trude; Jones, Andy; Rotstayn, Leon; Menon, Surabi; Quaas, Johannes; Ekman, Annica; Koch, Dorothy; Ruedy, Reto

    2009-09-25T23:59:59.000Z

    Uncertainties in aerosol forcings, especially those associated with clouds, contribute to a large extent to uncertainties in the total anthropogenic forcing. The interaction of aerosols with clouds and radiation introduces feedbacks which can affect the rate of rain formation. Traditionally these feedbacks were not included in estimates of total aerosol forcing. Here we argue that they should be included because these feedbacks act quickly compared with the time scale of global warming. We show that for different forcing agents (aerosols and greenhouse gases) the radiative forcings as traditionally defined agree rather well with estimates from a method, here referred to as radiative flux perturbations (RFP), that takes these fast feedbacks and interactions into account. Thus we propose replacing the direct and indirect aerosol forcing in the IPCC forcing chart with RFP estimates. This implies that it is better to evaluate the total anthropogenic aerosol effect as a whole.

  13. Task force reduces stuck-pipe costs

    SciTech Connect (OSTI)

    Bradley, W.B. (BP Research, Houston, TX (US)); Jarman, D. (BP Exploration Operation Co., Aberdeen (GB)); Auflick, R.A.; Plott, R.S. (BP Exploration Operating Co., Houston, TX (US)); Wood, R.D. (BP Exploration Operating Co., London (GB)); Schofield, T.R. (BP Exploration Operating Co., Beijing (CN)); Cocking, D. (BP Exploration Operating Co., Ho Chi Minh City (CN))

    1991-05-27T23:59:59.000Z

    A task-force approach to stuck pipe has produced more than a 70% reduction in BP Exploration Operating Co.'s worldwide stuck-pipe costs during 1989 and 1990. We believe that these results have been primarily due to focusing our attention on improving personnel performance rather than to the introduction of new technology. Key elements in this paper of the efforts involved: Recognizing the importance of the drilling contractor and the service company staff's role in helping control stuck pipe; Promoting a rig-team approach to tackling the problem; Providing training on rig-team, stuck-pipe problem solving; and raising awareness of stuck pipe through a coordinated worldwide communications program among BP, contractors, and service companies.

  14. Atomic force microscopy of biochemically tagged DNA

    SciTech Connect (OSTI)

    Ogletree, D.F.; Kolbe, W.; Spengler, S.; Salmeron, M. (Lawrence Berkeley Laboratory, CA (United States)); Hansma, H.G.; Bezanilla, M. (Univ. of California, Santa Barbara (United States)); Sano, T.; Smith, C.S.; Cantor, C.R. (Boston Univ., MA (United States))

    1993-05-01T23:59:59.000Z

    Small fragments of DNA of known length were made with the polymerase chain reaction. These fragments had biotin molecules covalently attached at their ends. They were subsequently labeled with a chimeric protein fusion between streptavidin and two immunoglobulin G-binding domains of staphyloccocal protein A. This tetrameric species was expected to bind up to four DNA molecules via their attached biotin moieties. The DNA-protein complex was deposited on mica and imaged with an atomic force microscope. The images revealed the protein chimera at the expected location at the ends of the strands of DNA as well as the expected dimers, trimers, and tetramers of DNA bound to a single protein. 25 refs., 5 figs.

  15. Entropic force, noncommutative gravity, and ungravity

    SciTech Connect (OSTI)

    Nicolini, Piero [Frankfurt Institute for Advanced Studies (FIAS), Institut fuer Theoretische Physik, Johann Wolfgang Goethe-Universitaet, Ruth-Moufang-Strasse 1, 60438 Frankfurt am Main (Germany)

    2010-08-15T23:59:59.000Z

    After recalling the basic concepts of gravity as an emergent phenomenon, we analyze the recent derivation of Newton's law in terms of entropic force proposed by Verlinde. By reviewing some points of the procedure, we extend it to the case of a generic quantum gravity entropic correction to get compelling deviations to the Newton's law. More specifically, we study: (1) noncommutative geometry deviations and (2) ungraviton corrections. As a special result in the noncommutative case, we find that the noncommutative character of the manifold would be equivalent to the temperature of a thermodynamic system. Therefore, in analogy to the zero temperature configuration, the description of spacetime in terms of a differential manifold could be obtained only asymptotically. Finally, we extend the Verlinde's derivation to a general case, which includes all possible effects, noncommutativity, ungravity, asymptotically safe gravity, electrostatic energy, and extra dimensions, showing that the procedure is solid versus such modifications.

  16. Multi-range force sensors utilizing shape memory alloys

    DOE Patents [OSTI]

    Varma, Venugopal K. (Knoxville, TN)

    2003-04-15T23:59:59.000Z

    The present invention provides a multi-range force sensor comprising a load cell made of a shape memory alloy, a strain sensing system, a temperature modulating system, and a temperature monitoring system. The ability of the force sensor to measure contact forces in multiple ranges is effected by the change in temperature of the shape memory alloy. The heating and cooling system functions to place the shape memory alloy of the load cell in either a low temperature, low strength phase for measuring small contact forces, or a high temperature, high strength phase for measuring large contact forces. Once the load cell is in the desired phase, the strain sensing system is utilized to obtain the applied contact force. The temperature monitoring system is utilized to ensure that the shape memory alloy is in one phase or the other.

  17. Notes 14. Experimental identification of bearing force coefficients

    E-Print Network [OSTI]

    San Andres, Luis

    2009-01-01T23:59:59.000Z

    An example of system parameter identification (Hybrid Brush Seal) Luis San Andr?s (lecturer) Thanks to Adolfo Delgado, Jos? Baker (RAs) & support from Siemens Power Generation MEEN 617 - April 2008 Structural parameters K shaft = 243 lbf/in (42...Notes 14. IDENTIFICATION OF BEARING FORCE COEFFICIENTS. ? Dr. Luis San Andr?s (2009) 1 Handout # 14 (MEEN 626) Application example Experimental identification of bearing force coefficients Experimental identification of the dynamic force...

  18. Wind forces on isolated and grouped mobile homes 

    E-Print Network [OSTI]

    Oldham, Gary Albert

    1974-01-01T23:59:59.000Z

    WIND FORCES ON ISOLATED AND GROUPED MOBILE HOMFS A Thesis by GARY ALBERT OLDHAM Submitted to the Graduate College of Texas A&M University in partial fulfillment of the requirement for the degree of MASTER OF SCIENCE December 1974 Major... Subject: Aerospace Engineering WIND FORCES ON ISOLATED AND GROUPED MOBILE HOMES A Thesis by GARY ALBERT OLDHAM Approved as to style and content by: (Chairman of Committee) ( a of Department (Member) (Member) December 1974 ABSTRACT Wind Forces...

  19. New Atomic Force Microscope Spectroscopy Probes Local Elasticity...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Materials Characterization New Atomic Force Microscope Spectroscopy Probes Local Elasticity March 04, 2015 Shown is a contact resonance frequency image after nano-oxidation of a...

  20. air force operations: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the issue of path planning is addressed for unmanned air vehicles (UAVs) cooperative joint-forces electronic attack operating in a hostile environment. Specifically, the...

  1. Dynamics and length distribution of microtubules under force and confinement

    E-Print Network [OSTI]

    Björn Zelinski; Nina Müller; Jan Kierfeld

    2012-12-14T23:59:59.000Z

    We investigate the microtubule polymerization dynamics with catastrophe and rescue events for three different confinement scenarios, which mimic typical cellular environments: (i) The microtubule is confined by rigid and fixed walls, (ii) it grows under constant force, and (iii) it grows against an elastic obstacle with a linearly increasing force. We use realistic catastrophe models and analyze the microtubule dynamics, the resulting microtubule length distributions, and force generation by stochastic and mean field calculations; in addition, we perform stochastic simulations. We also investigate the force dynamics if growth parameters are perturbed in dilution experiments. Finally, we show the robustness of our results against changes of catastrophe models and load distribution factors.

  2. Synthetic Peptides Use the Force to Influence Cell Survival

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    this study investigated how positively charged PAs interact with cells when water-hating properties and hydrogen bonding (a force that holds the nanofibers together) are altered....

  3. Correlation between fundamental binding forces and clinical prognosis...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Atomic force microscopy was used to “fish” for binding reactions between a fibronectin-coated probe (i.e., substrate simulating an implant device) and each of 15...

  4. Force Field Modeling of Conformational Energies: Importance of Multipole

    E-Print Network [OSTI]

    Ponder, Jay

    Force Field Modeling of Conformational Energies: Importance of Multipole Moments and Intramolecular as the molecules become more polar. Inclusion of multipole moments and intramolecular polarization can improve

  5. Air Force Announces Funding for Alternative Energy Research & Development

    Broader source: Energy.gov [DOE]

    The Air Force Research Laboratory (AFRL) has released a Broad Area Announcement (BAA) for over $25 million for Alternative Energy Research & Development.

  6. Improved Constraints on an Axion-Mediated Force

    SciTech Connect (OSTI)

    Hoedl, S. A.; Fleischer, F.; Adelberger, E. G.; Heckel, B. R. [Center for Experimental Nuclear Physics and Astrophysics, Box 354290, University of Washington, Seattle, Washington 98195-4290 (United States)

    2011-01-28T23:59:59.000Z

    Low mass pseudoscalars, such as the axion, can mediate macroscopic parity and time-reversal symmetry-violating forces. We searched for such a force between polarized electrons and unpolarized atoms using a novel, magnetically unshielded torsion pendulum. We improved the laboratory bounds on this force by more than 10 orders of magnitude for pseudoscalars heavier than 1 meV and have constrained this force over a broad range of astrophysically interesting masses (10 {mu}eV to 10 meV).

  7. A measurable force driven by an excitonic condensate

    SciTech Connect (OSTI)

    Hakio?lu, T. [Department of Physics, Bilkent University, 06800 Ankara (Turkey); Institute of Theoretical and Applied Physics, 48740 Turunç, Mu?la (Turkey); Özgün, Ege; Günay, Mehmet [Department of Physics, Bilkent University, 06800 Ankara (Turkey)

    2014-04-21T23:59:59.000Z

    Free energy signatures related to the measurement of an emergent force (?10{sup ?9}N) due to the exciton condensate (EC) in Double Quantum Wells are predicted and experiments are proposed to measure the effects. The EC-force is attractive and reminiscent of the Casimir force between two perfect metallic plates, but also distinctively different from it by its driving mechanism and dependence on the parameters of the condensate. The proposed experiments are based on a recent experimental work on a driven micromechanical oscillator. Conclusive observations of EC in recent experiments also provide a strong promise for the observation of the EC-force.

  8. amber force fields: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Fields and Development of Improved Protein Backbone Parameters Laboratory, Upton, New York 11973, ABSTRACT The ff94 force field that is com- monly associated with the Amber a...

  9. amber force field: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Fields and Development of Improved Protein Backbone Parameters Laboratory, Upton, New York 11973, ABSTRACT The ff94 force field that is com- monly associated with the Amber a...

  10. air force plant: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for Cooling Uninsulated Basement Systems ... 13 18 The Air Force Research Laboratory (AFRL) Scholars Program is currently Computer Technologies and Information Sciences...

  11. air force research: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    current status and opportunities MIT - DSpace Summary: There are hundreds of weapons programs, under the management of the United States Air Force worth billions of dollars. These...

  12. air force technical: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    technical design Texas at Austin, University of 20 The Air Force Research Laboratory (AFRL) Scholars Program is currently Computer Technologies and Information Sciences...

  13. air force surveys: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for Cooling Uninsulated Basement Systems ... 13 19 The Air Force Research Laboratory (AFRL) Scholars Program is currently Computer Technologies and Information Sciences...

  14. air force petroleum: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for Cooling Uninsulated Basement Systems ... 13 16 The Air Force Research Laboratory (AFRL) Scholars Program is currently Computer Technologies and Information Sciences...

  15. air force civil: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for Cooling Uninsulated Basement Systems ... 13 18 The Air Force Research Laboratory (AFRL) Scholars Program is currently Computer Technologies and Information Sciences...

  16. air force institute: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for Cooling Uninsulated Basement Systems ... 13 19 The Air Force Research Laboratory (AFRL) Scholars Program is currently Computer Technologies and Information Sciences...

  17. air force bench: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Effects for Cooling Uninsulated Basement Systems ... 13 19 The Air Force Research Laboratory (AFRL) Scholars Program is currently Computer Technologies and Information...

  18. air force installations: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for Cooling Uninsulated Basement Systems ... 13 19 The Air Force Research Laboratory (AFRL) Scholars Program is currently Computer Technologies and Information Sciences...

  19. air force journal: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for Cooling Uninsulated Basement Systems ... 13 16 The Air Force Research Laboratory (AFRL) Scholars Program is currently Computer Technologies and Information Sciences...

  20. Drag forces on inclusions in classical fields with dissipative dynamics

    E-Print Network [OSTI]

    Vincent Demery; D. S. Dean

    2010-04-01T23:59:59.000Z

    We study the drag force on uniformly moving inclusions which interact linearly with dynamical free field theories commonly used to study soft condensed matter systems. Drag forces are shown to be nonlinear functions of the inclusion velocity and depend strongly on the field dynamics. The general results obtained can be used to explain drag forces in Ising systems and also predict the existence of drag forces on proteins in membranes due to couplings to various physical parameters of the membrane such as composition, phase and height fluctuations.

  1. antibody recognition force: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Models of YesNo and Two-Alternative Forced-Choice Recognition Memory compared 3 models of recognition memory in their ability to generalize across yesno and...

  2. active force control: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    of free-hand ... Gilbertson, Matthew Wright 2010-01-01 9 On Dynamic Models of Robot Force Control MIT - DSpace Summary: For precise robot control, endpoint compliance...

  3. Force and shape coordination in amoeboid cell motility

    E-Print Network [OSTI]

    Alonso-Latorre, Baldomero

    2010-01-01T23:59:59.000Z

    strain energy. Traction force components in wild-type cellswild-type cells To investigate the role that MyoII contractility plays in the strain energy

  4. association task force: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Directions for Information Technology at Binghamton for Research Bahgat Sammakia to lead the Task Force on Information Technology (IT). The president's original Suzuki,...

  5. aespoe task force: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Directions for Information Technology at Binghamton for Research Bahgat Sammakia to lead the Task Force on Information Technology (IT). The president's original Suzuki,...

  6. air force information: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Directions for Information Technology at Binghamton for Research Bahgat Sammakia to lead the Task Force on Information Technology (IT). The president's original Suzuki,...

  7. assessment task force: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Directions for Information Technology at Binghamton for Research Bahgat Sammakia to lead the Task Force on Information Technology (IT). The president's original Suzuki,...

  8. SciTech Connect: Gametic selection as an evolutionary force:...

    Office of Scientific and Technical Information (OSTI)

    Gametic selection as an evolutionary force: the maintenance of lethal polymorphisms in wild populations of Mus musculus Citation Details In-Document Search Title: Gametic selection...

  9. Force controlled manipulation is a common technique for compli antly contacting and manipulating uncertain environments. Visual

    E-Print Network [OSTI]

    Abstract Force controlled manipulation is a common technique for compli­ antly contacting guide a manipulator simplifies the force control problem by allowing the effective use of low gain force force sensor and a stiff manipulator position control loop. Because the force sensor measures all forces

  10. An intuitive approach to inertial forces and the centrifugal force paradox in general relativity

    E-Print Network [OSTI]

    Rickard Jonsson

    2007-08-18T23:59:59.000Z

    As the velocity of a rocket in a circular orbit near a black hole increases, the outwardly directed rocket thrust must increase to keep the rocket in its orbit. This feature might appear paradoxical from a Newtonian viewpoint, but we show that it follows naturally from the equivalence principle together with special relativity and a few general features of black holes. We also derive a general relativistic formalism of inertial forces for reference frames with acceleration and rotation. The resulting equation relates the real experienced forces to the time derivative of the speed and the spatial curvature of the particle trajectory relative to the reference frame. We show that an observer who follows the path taken by a free (geodesic) photon will experience a force perpendicular to the direction of motion that is independent of the observers velocity. We apply our approach to resolve the submarine paradox, which regards whether a submerged submarine in a balanced state of rest will sink or float when given a horizontal velocity if we take relativistic effects into account. We extend earlier treatments of this topic to include spherical oceans and show that for the case of the Earth the submarine floats upward if we take the curvature of the ocean into account.

  11. Amsterdam Oxford Joint Rescue Forces Team Description Paper

    E-Print Network [OSTI]

    Visser, Arnoud

    Amsterdam Oxford Joint Rescue Forces Team Description Paper Virtual Robot competition Rescue van Weelden1 , Chaim Bastiaan1 , Niels Out1 , Olaf Zwennes1 , Sev´aztian Soffia Ot´arola1 , Julian de://www.jointrescueforces.eu Abstract. With the progress made in active exploration, the robots of the Joint Rescue Forces are capable

  12. Nuclear forces from chiral EFT: The unfinished business

    E-Print Network [OSTI]

    R. Machleidt; D. R. Entem

    2010-01-06T23:59:59.000Z

    In spite of the great progress we have seen in recent years in the derivation of nuclear forces from chiral effective field theory (EFT), some important issues are still unresolved. In this contribution, we discuss the open problems which have particular relevance for microscopic nuclear structure, namely, the proper renormalization of chiral nuclear potentials and sub-leading many-body forces.

  13. Surface forces: Surface roughness in theory and experiment

    SciTech Connect (OSTI)

    Parsons, Drew F., E-mail: Drew.Parsons@anu.edu.au; Walsh, Rick B.; Craig, Vincent S. J. [Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200 (Australia)] [Department of Applied Mathematics, Research School of Physical Sciences and Engineering, Australian National University, Canberra, ACT 0200 (Australia)

    2014-04-28T23:59:59.000Z

    A method of incorporating surface roughness into theoretical calculations of surface forces is presented. The model contains two chief elements. First, surface roughness is represented as a probability distribution of surface heights around an average surface height. A roughness-averaged force is determined by taking an average of the classic flat-surface force, weighing all possible separation distances against the probability distributions of surface heights. Second the model adds a repulsive contact force due to the elastic contact of asperities. We derive a simple analytic expression for the contact force. The general impact of roughness is to amplify the long range behaviour of noncontact (DLVO) forces. The impact of the elastic contact force is to provide a repulsive wall which is felt at a separation between surfaces that scales with the root-mean-square (RMS) roughness of the surfaces. The model therefore provides a means of distinguishing between “true zero,” where the separation between the average centres of each surface is zero, and “apparent zero,” defined by the onset of the repulsive contact wall. A normal distribution may be assumed for the surface probability distribution, characterised by the RMS roughness measured by atomic force microscopy (AFM). Alternatively the probability distribution may be defined by the histogram of heights measured by AFM. Both methods of treating surface roughness are compared against the classic smooth surface calculation and experimental AFM measurement.

  14. Optical geometry analysis of the electromagnetic self-force

    E-Print Network [OSTI]

    Sebastiano Sonego; Marek A. Abramowicz

    2006-02-17T23:59:59.000Z

    We present an analysis of the behaviour of the electromagnetic self-force for charged particles in a conformally static spacetime, interpreting the results with the help of optical geometry. Some conditions for the vanishing of the local terms in the self-force are derived and discussed.

  15. UW SCHOOL OF PHARMACY EDUCATIONAL INNOVATION TASK FORCE

    E-Print Network [OSTI]

    Sheridan, Jennifer

    UW SCHOOL OF PHARMACY EDUCATIONAL INNOVATION TASK FORCE 2012-2013 Barry Gidal (chair) Ron Burnette of the Task Force and how those activities fulfilled the charges and support the School's mission and strategic priorities. These documents will be posted, as appropriate, on the SOP Committee webpage (http://pharmacy.wisc.edu/about-school

  16. ORIGINAL PAPER Contributions of solar and greenhouse gases forcing

    E-Print Network [OSTI]

    Park, Rokjin

    and West 2006; Lean and Rind 2008; Sch- wartz et al. 2010). There is no doubt that the climate sci- ence radiative flux from Responsible editor: S. Hong. H.-G. Lim School of Environmental Science and Engineering to the surface of Earth (Trenberth et al. 2007). In addition to the GHG forcings, however, radiative forcings due

  17. air force nuclear: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    air force nuclear First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Air Force 2025 by CiteSeer Summary:...

  18. Integrating Tactile and Force Feedback with Finite Element Models

    E-Print Network [OSTI]

    , impedances of robot arms, and the computational model. We also describe an implementation of a compliance rendering system combining a low-impedance robot arm for large workspace kinesthetic force feedback, a high on a low-impedance robot arm, used here as a force feedback device. A real-time FEM model accepts user

  19. Crawling Waves from Radiation Force Excitation ZAEGYOO HAH,1

    E-Print Network [OSTI]

    Parker, Kevin J.

    Crawling Waves from Radiation Force Excitation ZAEGYOO HAH,1 CHRISTOPHER HAZARD,2 YOUNG THUNG CHO1 from focused beams that produce radiation force excitation within the tissue. Some examples are also radiofrequency ablated hepatic lesions in vitro 6,7 to characterize human skeletal muscle in vivo 8, 9

  20. air force materials: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    air force materials First Page Previous Page 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 1 Air Force Research Laboratory...

  1. ORIGINAL PAPER Attractive forces in microporous carbon electrodes for capacitive

    E-Print Network [OSTI]

    Bazant, Martin Z.

    ORIGINAL PAPER Attractive forces in microporous carbon electrodes for capacitive deionization P. M double layer in microporous carbon electrodes, suitable for incorporation in porous electrode theory and the metallic pore surfaces (image forces) that are not captured by mean-field theories, such as the Poisson

  2. Forcing scheme in pseudopotential lattice Boltzmann model for multiphase flows

    E-Print Network [OSTI]

    Q. Li; K. H. Luo; X. J. Li

    2012-04-18T23:59:59.000Z

    The pseudo-potential lattice Boltzmann (LB) model is a widely used multiphase model in the LB community. In this model, an interaction force, which is usually implemented via a forcing scheme, is employed to mimic the molecular interactions that cause phase segregation. The forcing scheme is therefore expected to play an important role in the pseudo-potential LB model. In this paper, we aim to address some key issues about forcing schemes in the pseudo-potential LB model. Firstly, theoretical and numerical analyses will be made for Shan-Chen's forcing scheme and the exact-difference-method (EDM) forcing scheme. The nature of these two schemes and their recovered macroscopic equations will be shown. Secondly, through a theoretical analysis, we will reveal the physics behind the phenomenon that different forcing schemes exhibit different performances in the pseudo-potential LB model. Moreover, based on the analysis, we will present an improved forcing scheme and numerically demonstrate that the improved scheme can be treated as an alternative approach for achieving thermodynamic consistency in the pseudo-potential LB model.

  3. Formal definition of POTENTIAL ENERGY (valid for conservative forces only)

    E-Print Network [OSTI]

    page - 16 Formal definition of POTENTIAL ENERGY (valid for conservative forces only) Given one type of conservative force F UB - UA= - = - Definition of 'Potential energy difference" conserv #12;page - 17 the definition of the "potential energy difference UB - UA " as equal to negative value of the work W done

  4. ENERGY BASED ICE COLLISION FORCES Claude Daley1

    E-Print Network [OSTI]

    Daley, Claude

    1 ENERGY BASED ICE COLLISION FORCES Claude Daley1 1 Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1C 3X5 ABSTRACT Ice collision forces can be determined by energy considerations. A variety of interaction geometry cases are considered. The indentation energy functions for eight different

  5. ENERGY BASED ICE COLLISION FORCES Claude Daley1

    E-Print Network [OSTI]

    Daley, Claude

    ENERGY BASED ICE COLLISION FORCES Claude Daley1 1 Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1C 3X5 ABSTRACT Ice collision forces can be determined by energy considerations. A variety of interaction geometry cases are considered. The indentation energy functions for eight different

  6. Long range forces between atomic impurities in liquid helium

    E-Print Network [OSTI]

    Long range forces between atomic impurities in liquid helium J. Dupont-Roc Laboratoire Kastler in a polarizable medium. We show that atomic impurities in liquid helium may indeed realize repulsive forces embedded in liquid helium, super uid or not. Solid helium have also been used. Successful theoretical

  7. Biocompatible Force Sensor with Optical Readout and Dimensions of

    E-Print Network [OSTI]

    Straight, Aaron

    Biocompatible Force Sensor with Optical Readout and Dimensions of 6 nm3 Hari Shroff,,§ Bjo1rn M Received June 6, 2005 ABSTRACT We have developed a nanoscopic force sensor with optical readout. The sensor energy transfer. The sensor was calibrated between 0 and 20 pN using a combined magnetic tweezers

  8. Efficiency of Mixing Forced by Unsteady Shear Flow RYUICHIRO INOUE

    E-Print Network [OSTI]

    Smyth, William David

    Efficiency of Mixing Forced by Unsteady Shear Flow RYUICHIRO INOUE Department of Physics form 18 December 2008) ABSTRACT The dependence of mixing efficiency on time-varying forcing is studied frame and allowing the tilt angle to vary in time. Mixing efficiency Gc is defined as the ratio

  9. Extra force in Kaluza-Klein gravity theory

    E-Print Network [OSTI]

    W. B. Belayev

    2007-06-18T23:59:59.000Z

    In induced matter Kaluza-Klein gravity theory the solution of the dynamics equations for the test particle on null path leads to additional force in four-dimensional space-time. We find such force from five-dimensional geodesic line equations and apply this approach to analysis of the asymmetrically warped space-time.

  10. High-temperature piezoresponse force microscopy B. Bhatia,1

    E-Print Network [OSTI]

    King, William P.

    High-temperature piezoresponse force microscopy B. Bhatia,1 J. Karthik,2 D. G. Cahill,1,2 L. W September 2011; published online 24 October 2011) We report high temperature piezoresponse force microscopy resistive heater allows local temperature control up to 1000 C with minimal electrostatic interactions

  11. Modeling Masticatory Muscle Force in Finite Element Analysis

    E-Print Network [OSTI]

    Modeling Masticatory Muscle Force in Finite Element Analysis: Sensitivity Analysis Using Principal: electromyography; muscle force; mastication; primates; principal coordinates analysis; finite element analysis Our Origins, University of Arizona, Tempe, Arizona ABSTRACT Our work on a finite element model of the skull

  12. Techniques for Modeling Muscle-Induced Forces in Finite Element

    E-Print Network [OSTI]

    Dumont, Elizabeth R.

    program was written to interface with a commercial finite element analysis tool to automatically apply: finite element analysis; muscle force; skull; muscle loading alogorithm, biting Finite element analysisTechniques for Modeling Muscle- Induced Forces in Finite Element Models of Skeletal Structures IAN

  13. Fluid forces on two circular cylinders in crossflow

    SciTech Connect (OSTI)

    Jendrzejczyk, J.A.; Chen, S.S.

    1986-01-01T23:59:59.000Z

    Fluid excitation forces are measured in a water loop for two circular cylinders arranged in tandem and normal to flow. The Strouhal number and fluctuating drag and lift coefficients for both cylinders are presented for various spacings and incoming flow conditions. The results show the effects of Reynolds number, pitch ratio, and upstream turbulence on the fluid excitation forces.

  14. Wavenumber Locking And Pattern Formation In Spatially Forced Systems

    SciTech Connect (OSTI)

    Hagberg, Aric [Los Alamos National Laboratory; Meron, Ehud [BEN-GURION UNIV; Manor, Rotem [BEN-GURION UNIV

    2008-01-01T23:59:59.000Z

    We study wavenumber locking and pattern formation resulting from weak spatially periodic one-dimensional forcing of two-dimensional systems. We consider systems that support stationary or traveling stripe patterns in the absence of the forcing, and assume that the one-dimensional forcing is aligned with the direction of the stripe patterns. When the forcing wavenumber is about twice as large as the wavenumber of the unforced system we find that the forcing can either select or stabilize a resonant stripe solution at half the forcing wavenumber, or create a new resonant solution. When the wavenumber mismatch is high we find that the wave-vector component of the pattern in the direction of the forcing can stilI lock at half the forcing wavenumber, but a wave-vector component in the orthogonal direction develops to compensate for the total wavenumber. As a result stationary two-dimensional rectangular and oblique patterns form. When the unforced system supports traveling waves resonant rectangular patterns remain stationary but the oblique patterns travel in a direction orthogonal to the traveling-waves.

  15. Feeling molecular forces: tactile feedback to enhance drug design 

    E-Print Network [OSTI]

    Williams, Jocylin Amber

    2013-02-22T23:59:59.000Z

    that can return force and torque to the user through a hand held stylus. The system configuration for molecular modeling consists of integrating the haptic device with a high-end PC running Windows NT and developing code to model the intermolecular forces...

  16. Academic Science Program Task Force Tuesday, September 13, 2011

    E-Print Network [OSTI]

    Academic Science Program Task Force Tuesday, September 13, 2011 3:00 p.m. Nelson Hall, Room 3220 on the Academic Science Program Task Force to Council of Deans on Thursday, September 22, 2011 · Margery has been, September 28, 2011 in Witherspoon Cinema from 3-4 p.m. and topics will include budget, strategic plan

  17. Spanning the Scales of Granular Materials: Microscopic Force Imaging

    E-Print Network [OSTI]

    Nicolas Brodu; Joshua A. Dijksman; Robert P. Behringer

    2014-08-11T23:59:59.000Z

    If you walk on sand, it supports your weight. How do the disordered forces between particles in sand organize, to keep you from sinking? This simple question is surprisingly difficult to answer experimentally: measuring forces in three dimensions, between deeply buried grains, is challenging. We describe here experiments in which we have succeeded in measuring forces inside a granular packing subject to controlled deformations. We connect the measured micro-scale forces to the macro-scale packing force response with an averaging, mean field calculation. This calculation explains how the combination of packing structure and contact deformations produce the unexpected mechanical response of the packing, and reveals a surprising microscopic particle deformation enhancement mechanism.

  18. Because of the upcoming Jamestown 2007 quadricentennial, the Virginia Heritage Project Task Force Force of the Virtual

    E-Print Network [OSTI]

    Beex, A. A. "Louis"

    #12;Because of the upcoming Jamestown 2007 quadricentennial, the Virginia Heritage Project Task Force Force of the Virtual Library of Virginia (VIVA) asked Colonial National Historical Park-1996, available on the Web. During 2003- 2004, the Virginia Heritage Project Task surveyed manuscript holdings

  19. ForceFit: a code to fit classical force fields to ab-initio potential energy surfaces

    SciTech Connect (OSTI)

    Henson, Neil Jon [Los Alamos National Laboratory; Waldher, Benjamin [WSU; Kuta, Jadwiga [WSU; Clark, Aurora [WSU; Clark, Aurora E [NON LANL

    2009-01-01T23:59:59.000Z

    The ForceFit program package has been developed for fitting classical force field parameters based upon a force matching algorithm to quantum mechanical gradients of configurations that span the potential energy surface of the system. The program, which runs under Unix and is written in C++, is an easy to use, nonproprietary platform that enables gradient fitting of a wide variety of functional force field forms to quantum mechanical information obtained from an array of common electronic structure codes. All aspects of the fitting process are run from a graphical user interface, from the parsing of quantum mechanical data, assembling of a potential energy surface database, setting the force field and variables to be optimized, choosing a molecular mechanics code for comparison to the reference data, and finally, the initiation of a least squares minimization algorithm. Furthermore, the code is based on a modular templated code design that enables the facile addition of new functionality to the program.

  20. A calibration method for lateral forces for use with colloidal probe force microscopy cantilevers

    SciTech Connect (OSTI)

    Quintanilla, M. A. S.; Goddard, D. T. [Nexia Solutions Ltd., Springfields, Salwick, Preston, Lancashire PR4 0XJ (United Kingdom)

    2008-02-15T23:59:59.000Z

    A calibration method is described for colloidal probe cantilevers that enables friction force measurements obtained using lateral force microscopy (LFM) to be quantified. The method is an adaptation of the lever method of Feiler et al. [A. Feiler, P. Attard, and I. Larson, Rev. Sci. Instum. 71, 2746 (2000)] and uses the advantageous positioning of probe particles that are usually offset from the central axis of the cantilever. The main sources of error in the calibration method are assessed, in particular, the potential misalignment of the long axis of the cantilever that ideally should be perpendicular to the photodiode detector. When this is not taken into account, the misalignment is shown to have a significant effect on the cantilever torsional stiffness but not on the lateral photodiode sensitivity. Also, because the friction signal is affected by the topography of the substrate, the method presented is valid only against flat substrates. Two types of particles, 20 {mu}m glass beads and UO{sub 3} agglomerates attached to silicon tapping mode cantilevers were used to test the method against substrates including glass, cleaved mica, and UO{sub 2} single crystals. Comparisons with the lateral compliance method of Cain et al. [R. G. Cain, S. Biggs, and N. W. Page, J. Colloid Interface Sci. 227, 55 (2000)] are also made.

  1. Forcing Adsorption of a Tethered Polymer by Pulling

    E-Print Network [OSTI]

    Judy-anne Osborn; Thomas Prellberg

    2010-07-19T23:59:59.000Z

    We present an analysis of a partially directed walk model of a polymer which at one end is tethered to a sticky surface and at the other end is subjected to a pulling force at fixed angle away from the point of tethering. Using the kernel method, we derive the full generating function for this model in two and three dimensions and obtain the respective phase diagrams. We observe adsorbed and desorbed phases with a thermodynamic phase transition in between. In the absence of a pulling force this model has a second-order thermal desorption transition which merely gets shifted by the presence of a lateral pulling force. On the other hand, if the pulling force contains a non-zero vertical component this transition becomes first-order. Strikingly, we find that if the angle between the pulling force and the surface is beneath a critical value, a sufficiently strong force will induce polymer adsorption, no matter how large the temperature of the system. Our findings are similar in two and three dimensions, an additional feature in three dimensions being the occurrence of a reentrance transition at constant pulling force for small temperature, which has been observed previously for this model in the presence of pure vertical pulling. Interestingly, the reentrance phenomenon vanishes under certain pulling angles, with details depending on how the three-dimensional polymer is modeled.

  2. Flow-Force Compensation in a Hydraulic Valve

    E-Print Network [OSTI]

    Lugowski, Jan

    2015-01-01T23:59:59.000Z

    Flow-reaction forces acting in hydraulic valves have been studied for many decades. Despite this, they are difficult to account for due to the complexities of the jet flow. This paper focuses only on the reduction, also referred to as compensation, of the flow force as applied to a valve spool featuring a profile of a turbine bucket. Fluid power textbooks explain the compensation taking place on such a profile by applying Newton laws of motion to the profile and deliver an equation for the magnitude and the direction of the flow force. This paper shows that both the magnitude and the direction of the compensating flow force are incorrect if calculated from the textbook equation. A corrected analysis of the dynamic forces is presented that are in agreement with earlier experiments by this author. It follows that the compensating flow force should be calculated from the static-pressure imbalance on the spool profile. That is, not Newton but Pascal law should be applied to calculate the compensating flow force.

  3. Non-contact atomic-level interfacial force microscopy

    SciTech Connect (OSTI)

    Houston, J.E.; Fleming, J.G.

    1997-02-01T23:59:59.000Z

    The scanning force microscopies (notably the Atomic Force Microscope--AFM), because of their applicability to nearly all materials, are presently the most widely used of the scanning-probe techniques. However, the AFM uses a deflection sensor to measure sample/probe forces which suffers from an inherent mechanical instability that occurs when the rate of change of the force with respect to the interfacial separation becomes equal to the spring constant of the deflecting member. This instability dramatically limits the breadth of applicability of AFM-type techniques to materials problems. In the course of implementing a DOE sponsored basic research program in interfacial adhesion, a self-balancing force sensor concept has been developed and incorporated into an Interfacial Force Microscopy (IFM) system by Sandia scientists. This sensor eliminates the instability problem and greatly enhances the applicability of the scanning force-probe technique to a broader range of materials and materials parameters. The impact of this Sandia development was recognized in 1993 by a Department of Energy award for potential impact on DOE programs and by an R and D 100 award for one of the most important new products of 1994. However, in its present stage of development, the IFM is strictly a research-level tool and a CRADA was initiated in order to bring this sensor technology into wide-spread availability by making it accessible in the form of a commercial instrument. The present report described the goals, approach and results of this CRADA effort.

  4. Extracting folding landscape characteristics of biomolecules using mechanical forces

    E-Print Network [OSTI]

    Changbong Hyeon; Michael Hinczewski; D. Thirumalai

    2015-01-14T23:59:59.000Z

    In recent years single molecule force spectroscopy has opened a new avenue to provide profiles of the complex energy landscape of biomolecules. In this field, quantitative analyses of the data employing sound theoretical models, have played a major role in interpreting data and anticipating outcomes of experiments. Here, we explain how by using temperature as a variable in mechanical unfolding of biomolecules in force spectroscopy, the roughness of the energy landscape can be measured without making any assumptions about the underlying reaction coordinate. Estimates of other aspects of the energy landscape such as free energy barriers or the transition state (TS) locations could depend on the precise model used to analyze the experimental data. We illustrate the inherent difficulties in obtaining the transition state location from loading rate or force-dependent unfolding rates. Because the transition state moves as the force or the loading rate is varied, which is reminiscent of the Hammond effect, it is in general difficult to invert the experimental data. The independence of the TS location on force holds good only for brittle or hard biomolecules whereas the TS location changes considerably if the molecule is soft or plastic. Finally, we discuss the goodness of the end-to-end distance (or pulling) coordinate of the molecule as a surrogate reaction coordinate in a situation like force-induced ligand-unbinding from a gated molecular receptor as well as force-quench refolding of an RNA hairpin.

  5. Hydrodynamic forces on smooth inclined cylinder in oscillatory flow

    SciTech Connect (OSTI)

    Kang, H.G. [Dalian Univ. of Technology (China)

    1993-12-31T23:59:59.000Z

    The hydrodynamic forces on a smooth inclined circular cylinder exposed to oscillating flow were experimentally investigated at Reynolds number (Re) in the range 40,000--200,000 and Keulegan-Capenter number (Kc) in the interval from 5--40. In the test, Re number and Kc number were varied systematically. The inertia force coefficient (C{sub M}) and the drag force coefficient (C{sub D}) in Morison equation were determined form the measured loads and the water particle kinematics. This analysis uses a modified form of Morison equation since it uses the normal velocity and acceleration. Thus, the applicability of the Cross Flow Principle was assumed. This principle, simply stated, is as follows: the force acting in the direction normal to the axis of a cylinder placed at some oblique angle to the direction of flow is expressed in terms of the normal component of flow only, and the axial component is disregarded. Both total in-line force coefficient (C{sub F}) and transverse force (lift) coefficient (C{sub L}) were analyzed in terms of their maximum and root mean square values. All the in-line and lift force coefficient were given as a functions of Re and Kc number. From this research, it can be seen that the Cross-Flow Principle does not always work well. It seems valid for the total in-line force at high Re and large Kc number; the C{sub M} for {alpha} = 45{degree} is larger and the C{sub D} for {alpha} = 45{degree} is smaller than that for {alpha} = 90{degree} and Re {ge} 80,000. The hydrodynamic force coefficients C{sub D} and C{sub M} for the inclined cylinder are only the functions of oblique angle ({alpha}) and Kc number, but not of the Re number.

  6. Effects of realistic tensor force on nuclear structure

    SciTech Connect (OSTI)

    Nakada, H. [Department of Physics, Graduate School of Science, Chiba University, Inage, Chiba 263-8522 (Japan)

    2012-10-20T23:59:59.000Z

    First-order tensor-force effects on nuclear structure are investigated in the self-consistent mean-field and RPA calculations with the M3Y-type semi-realistic interactions, which contain the realistic tensor force. The tensor force plays a key role in Z- or N-dependence of the shell structure, and in transitions involving spin degrees-of-freedom. It is demonstrated that the semi-realistic interactions successfully describe the N-dependence of the shell structure in the proton-magic nuclei (e.g. Ca and Sn), and the magnetic transitions (e.g. M1 transition in {sup 208}Pb).

  7. Force-velocity relations for multiple molecular motor transportation

    E-Print Network [OSTI]

    Wang, Ziqing

    2009-01-01T23:59:59.000Z

    A transition rate model of cargo transportation by N effective molecular motors is proposed. Under the assumption of steady state, the force-velocity curve of multi-motor system can be derived from the force-velocity curve of single motor. Our work shows, in the case of low load, the velocity of multi-motor system can decrease or increase with increasing motor number, which is dependent on the single motor force-velocity curve. And most commonly, the velocity decreases. This gives a possible explanation to some recent experimental observations.

  8. Force-velocity relations for multiple-molecular-motor transport

    E-Print Network [OSTI]

    Ziqing Wang; Ming Li

    2009-10-01T23:59:59.000Z

    A transition rate model of cargo transport by $N$ molecular motors is proposed. Under the assumption of steady state, the force-velocity curve of multi-motor system can be derived from the force-velocity curve of single motor. Our work shows, in the case of low load, the velocity of multi-motor system can decrease or increase with increasing motor number, which is dependent on the single motor force-velocity curve. And most commonly, the velocity decreases. This gives a possible explanation to some recent

  9. New confining force solution of QCD axion domain wall problem

    E-Print Network [OSTI]

    S. M. Barr; Jihn E. Kim

    2014-11-13T23:59:59.000Z

    The serious cosmological problems created by the axion-string/axion-domain-wall system in standard axion models are alleviated by positing the existence of a new confining force. The instantons of this force can generate an axion potential that erases the axion strings long before QCD effects become important, thus preventing QCD-generated axion walls from ever appearing. Axion walls generated by the new confining force would decay so early as not to contribute significantly to the energy in axion dark matter.

  10. Faddeev equations with three-nucleon force in momentum space

    SciTech Connect (OSTI)

    Stadler, A. (Institut fuer Theoretische Physik, Universitaet Hannover, D-3000 Hannover 1 (Germany)); Gloeckle, W. (Institut fuer Theoretische Physik, Ruhr-Universitaet Bochum, D-4630 Bochum 1 (Germany)); Sauer, P.U. (Institut fuer Theoretische Physik, Universitaet Hannover, D-3000 Hannover 1 (Germany) Department of Physics, FM-15, University of Washington, Seattle, Washington 98195 (United States))

    1991-12-01T23:59:59.000Z

    Modified Faddeev equations that allow the inclusion of irreducible three-body forces in addition to two-body interactions are formulated and the technical apparatus for their solution in momentum space is described. Results for the triton binding energy are obtained with realistic two-nucleon interactions and the Tucson-Melbourne two-pion exchange three-nucleon force and compared with previous calculations. Excellent agreement with the results of other groups is found confirming that the accuracy of present-day techniques for handling three-nucleon forces is very high indeed.

  11. armed forced chief: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Technologies and Information Sciences Websites Summary: muscle produces a torque at a joint that is the product of its contractile force and its moment arm Arm and Estimation of...

  12. Renormalization and power counting of chiral nuclear forces

    SciTech Connect (OSTI)

    Long, Bingwei [JLAB

    2013-08-01T23:59:59.000Z

    I discuss the progress we have made on modifying Weinberg's prescription for chiral nuclear forces, using renormalization group invariance as the guideline. Some of the published results are presented.

  13. Spatio-temporal spectral analysis of a forced cylinder wake

    E-Print Network [OSTI]

    D'Adamo, Juan; Wesfreid, José Eduardo

    2011-01-01T23:59:59.000Z

    The wake of a circular cylinder performing rotary oscillations is studied using hydrodynamic tunnel experiments at $Re=100$. Two-dimensional particle image velocimetry on the mid-plane perpendicular to the axis of cylinder is used to characterize the spatial development of the flow and its stability properties. The lock-in phenomenon that determines the boundaries between regions of the forcing parameter space were the wake is globally unstable or convectively unstable is scrutinized using the experimental data. A novel method based on the analysis of power density spectra of the flow allows us to give a detailed description of the forced wake, shedding light on the energy distribution in the different frequency components and in particular on a cascade-like mechanism evidenced for a high amplitude of the forcing oscillation. In addition, a calculation of the drag from the velocity field is performed, allowing us to relate the resulting force on the body to the wake properties.

  14. EVALUATION OF FORCED CONVECTION NUCLEATE BOILING DETECTION BY ACOUSTIC EMISSION

    E-Print Network [OSTI]

    Wells, R.P.

    2010-01-01T23:59:59.000Z

    of Energy under Contract W-7405-ENG-48 (JJ V'J y \\J7 LEGALunder Contract No. W-7405-ENG-48. References J.A. Paterson,under Contract No. W-7405-ENG-48. Apparatus The forced-

  15. 2014-09-25 Frsvarsmakten Swedish Armed Forces

    E-Print Network [OSTI]

    Zhao, Yuxiao

    : SCADA protection In 2010, The Swedish Armed Forces (SwAF) Defence Staff, Policy Supervisory control and data acquisition (SCADA) systems are used for a number of industrial and critical-infrastructure control applications. SCADA systems can involve

  16. Government and Industry a Force for Collaboration at the Energy...

    Office of Environmental Management (EM)

    and Industry A Force for Collaboration at the Energy Roadmap Update Workshop Sept. 16, 2009 Energy sector leaders in the public and private sectors have once again come together to...

  17. Collective behaviors of the Casimir force in microelectromechanical systems

    SciTech Connect (OSTI)

    Chan, H. B.; Yelton, J.

    2013-01-23T23:59:59.000Z

    Our goal was to explore the strong dependence of the Casimir force on the shape of the interacting bodies. We made significant progress and measured the Casimir force on silicon surface with rectangular corrugation and showed that the results agree with theoretical calculations, provided that the optical properties of silicon are taken into account. Furthermore, we performed measurement of the Casimir force within a single chip for the first time, between a doubly clamped beam and a movable, on-chip electrode at liquid helium temperature. This experiment represents a new way of studying the Casimir effect, a significant advance from the conventional approach of placing an external surface close to a force transducer.

  18. atomic force acoustic: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    systems Peder of Denmark 31 January 2008 12;ii 12;Abstract Within the field of microfluidics and lab-on-a-chip systems 7 3 Mechanical Diode-Based Ultrasonic Atomic Force...

  19. Orbital precession due to central-force perturbations

    E-Print Network [OSTI]

    Gregory S. Adkins; Jordan McDonnell

    2007-02-02T23:59:59.000Z

    We calculate the precession of Keplerian orbits under the influence of arbitrary central-force perturbations. Our result is in the form of a one-dimensional integral that is straightforward to evaluate numerically. We demonstrate the effectiveness of our formula for the case of the Yukawa potential. We obtain analytic results for potentials of the form V(r) = \\alpha r^n and V(r) = \\alpha \\ln(r/\\lambda) in terms of the hypergeometric function {_2F_1} (1/2-n/2,1-n/2; 2; e^2), where e is the eccentricity. Our results reproduce the known general relativistic (n=-3), constant force (n=1), and cosmological constant (n=2) precession formulas. Planetary precessions are often used to constrain the sizes of hypothetical new weak forces--our results allow for more precise, and often stronger, constraints on such proposed new forces.

  20. ARMY, MARINE CORPS, NAVY, AIR FORCE MULTISERVICE TACTICS,

    E-Print Network [OSTI]

    US Army Corps of Engineers

    ARMY, MARINE CORPS, NAVY, AIR FORCE MULTISERVICE TACTICS, TECHNIQUES, AND PROCEDURES Development and Integration T. L. DAVISON THOMAS J. LOFTUS Captain, US Navy Major General, USAF, MC, CFS Acting Assistant Surgeon General Navy Warfare Development Command Health Care Operations Office

  1. Modeling Robot Dynamic Performance for Endpoint Force Control

    E-Print Network [OSTI]

    Eppinger, Steven D.

    1988-09-01T23:59:59.000Z

    This research aims to understand the fundamental dynamic behavior of servo-controlled machinery in response to various types of sensory feedback. As an example of such a system, we study robot force control, a scheme ...

  2. Bonding, antibonding and tunable optical forces in asymmetric membranes

    E-Print Network [OSTI]

    Hui, Pui-Chuen

    We demonstrate that tunable attractive (bonding) and repulsive (anti-bonding) forces can arise in highly asymmetric structures coupled to external radiation, a consequence of the bonding/anti-bonding level repulsion of ...

  3. Robotic Catheter Cardiac Ablation Combining Ultrasound Guidance and Force Control

    E-Print Network [OSTI]

    manipulation speeds while allowing the operator to utilize robotic teleoperation to reduce radiation exposure force control. One medical application that may benefit from this technology is the radiofrequency (RF

  4. US Air Force Fellows and Education with Industry Presentation...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2015 10:00 AM - 11:00 AM Col Michael Richardson, Maj Stephen Pippel, and Capt Kelley Thompson, US Air Force Global Security Directorate Seminar Building 4500-N, Weinberg...

  5. Force Field Parameter Estimation of Functional Perfluoropolyether Lubricants

    SciTech Connect (OSTI)

    Smith, R.; Chung, P.S.; Steckel, J; Jhon, M.S.; Biegler, L.T.

    2011-01-01T23:59:59.000Z

    The head disk interface in a hard disk drive can be considered to be one of the hierarchical multiscale systems, which require the hybridization of multiscale modeling methods with coarse-graining procedure. However, the fundamental force field parameters are required to enable the coarse-graining procedure from atomistic/molecular scale to mesoscale models. In this paper, we investigate beyond molecular level and perform ab initio calculations to obtain the force field parameters. Intramolecular force field parameters for Zdol and Ztetraol were evaluated with truncated PFPE molecules to allow for feasible quantum calculations while still maintaining the characteristic chemical structure of the end groups. Using the harmonic approximation to the bond and angle potentials, the parameters were derived from the Hessian matrix, and the dihedral force constants are fit to the torsional energy profiles generated by a series of constrained molecular geometry optimization.

  6. Modeling and control of undesirable dynamics in atomic force microscopes

    E-Print Network [OSTI]

    El Rifai, Osamah M

    2002-01-01T23:59:59.000Z

    The phenomenal resolution and versatility of the atomic force microscope (AFM), has made it a widely-used instrument in nanotechnology. In this thesis, a detailed model of AFM dynamics has been developed. It includes a new ...

  7. air force base: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Index 1 Energy Savings Performance Contract- Robins Air Force Base, Georgia Texas A&M University - TxSpace Summary: Due to budgetary constraints and lack of funding for energy...

  8. air force bases: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Index 1 Energy Savings Performance Contract- Robins Air Force Base, Georgia Texas A&M University - TxSpace Summary: Due to budgetary constraints and lack of funding for energy...

  9. Dynamics of the Thermohaline Circulation under Wind forcing

    E-Print Network [OSTI]

    Hongjun Gao; Jinqiao Duan

    2001-08-12T23:59:59.000Z

    The ocean thermohaline circulation, also called meridional overturning circulation, is caused by water density contrasts. This circulation has large capacity of carrying heat around the globe and it thus affects the energy budget and further affects the climate. We consider a thermohaline circulation model in the meridional plane under external wind forcing. We show that, when there is no wind forcing, the stream function and the density fluctuation (under appropriate metrics) tend to zero exponentially fast as time goes to infinity. With rapidly oscillating wind forcing, we obtain an averaging principle for the thermohaline circulation model. This averaging principle provides convergence results and comparison estimates between the original thermohaline circulation and the averaged thermohaline circulation, where the wind forcing is replaced by its time average. This establishes the validity for using the averaged thermohaline circulation model for numerical simulations at long time scales.

  10. Bedrock channel response to tetonic, climatic and eustatic forcings

    E-Print Network [OSTI]

    Snyder, Noah P

    2001-01-01T23:59:59.000Z

    The response of bedrock channels to external forcings is investigated in this thesis. The approach is to test and constrain a theoretical model for bedrock-channel incision based on shear stress using field data. The primary ...

  11. On advancement of high speed atomic force microscope technology

    E-Print Network [OSTI]

    SooHoo, Kimberly E

    2008-01-01T23:59:59.000Z

    High speed atomic force microscopy (AFM) is a developing process in which nanoscale objects, such as crystal structures or strands of DNA, can be imaged at rates fast enough to watch processes as they occur. Although current ...

  12. Vacuum fluctuation forces between ultra-thin films

    E-Print Network [OSTI]

    Andrea Benassi; Carlo Calandra

    2008-08-18T23:59:59.000Z

    We have investigated the role of the quantum size effects in the evaluation of the force caused by electromagnetic vacuum fluctuations between ultra-thin films, using the dielectric tensor derived from the particle in a box model. Comparison with the results obtained by adopting a continuum dielectric model shows that, for film thicknesses of 1-10 nm, the electron confinement causes changes in the force intensity with respect to the isotropic plasma model which range from 40% to few percent depending upon the film electron density and the film separation. The calculated force shows quantum size oscillations, which can be significant for film separation distances of several nanometers. The role of electron confinement in reducing the large distance Casimir force is discussed.

  13. On the Correlation between Forcing and Climate Sensitivity

    E-Print Network [OSTI]

    Sokolov, Andrei

    The possible correlation between climate sensitivity and radiative forcing is studied using versions of the NCAR Community Atmospheric Model (CAM) model with different climate sensitivities. No such correlation was found ...

  14. Polymer-mediated entropic forces between scale-free objects

    E-Print Network [OSTI]

    Faghfoor Maghrebi, Mohammad

    The number of configurations of a polymer is reduced in the presence of a barrier or an obstacle. The resulting loss of entropy adds a repulsive component to other forces generated by interaction potentials. When the ...

  15. Forced turbulence in thermally bistable gas: A parameter study

    E-Print Network [OSTI]

    Seifried, D; Niemeyer, J C

    2010-01-01T23:59:59.000Z

    Context: The thermal instability is one of the dynamical agents for turbulence in the diffuse interstellar medium, where both, turbulence and thermal instability interact in a highly non-linear manner. Aims: We study basic properties of turbulence in thermally bistable gas for variable simulation parameters. The resulting cold gas fractions can be applied as parameterisation in simulations on galactic scales. Methods: Turbulent flow is induced on large scales by means of compressive stochastic forcing in a periodic box. The compressible Euler equations with constant UV heating and a parameterised cooling function are solved on uniform grids. We investigate several values of the mean density of the gas and different magnitudes of the forcing. For comparison with other numerical studies, solenoidal forcing is applied as well. Results: After a transient phase, we observe that a state of statistically stationary turbulence is approached. Compressive forcing generally produces a two-phase medium, with a decreasing...

  16. Host nation security force development : a new roadmap

    E-Print Network [OSTI]

    Fitzgerald, Shawn (Shawn Michael)

    2013-01-01T23:59:59.000Z

    A new model concerning the concepts of host nation security force development, or security sector reform (SSR), is proposed. This model is rooted in scholarly literature and seeks to fill current gaps in United States Army ...

  17. air force pilots: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 21 The Air Force Research Laboratory (AFRL) Scholars Program is currently Computer Technologies and Information...

  18. air force pilot: Topics by E-print Network

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    14 15 16 17 18 19 20 21 22 23 24 25 Next Page Last Page Topic Index 21 The Air Force Research Laboratory (AFRL) Scholars Program is currently Computer Technologies and Information...

  19. Design and analysis of a monolithic flexure atomic force microscope

    E-Print Network [OSTI]

    Ljubicic, Dean M

    2008-01-01T23:59:59.000Z

    This thesis details the design, manufacture, and testing of a sub-nanometer accuracy atomic force microscope. It was made to be integrated into the Sub-Atomic Measuring Machine (SAMM) in collaboration with the University ...

  20. Portfolio management in the Air Force : current status and opportunities

    E-Print Network [OSTI]

    Morgan, Dave B

    2011-01-01T23:59:59.000Z

    There are hundreds of weapons programs, under the management of the United States Air Force worth billions of dollars. These programs are being developed to fulfill a need in the U.S. defense strategy. Bringing these weapon ...

  1. ARI Task Force, ECA Work to Stimulate Regional Economies

    Broader source: Energy.gov [DOE]

    WASHINGTON, D.C. – DOE’s Asset Revitalization Initiative (ARI) Task Force met with the Energy Communities Alliance (ECA) this week to advance the Department’s processes for transferring excess land...

  2. Struts, springs and crumple zones: protein structures under force

    E-Print Network [OSTI]

    Dill, Jesse

    2012-01-01T23:59:59.000Z

    energies  indicating   both  that  the  discontinuous  wild-­?energies  reported  from  optical  tweezers  experiments  showed  that   unfolding   of  the  wild-­?energy  of  folding  calculated   when  force  was  applied  at  residues  16  and  61  in  the  wild-­?

  3. Bacteria Total Maximum Daily Load Task Force Final Report 

    E-Print Network [OSTI]

    Jones, C. Allan; Wagner, Kevin; Di Giovanni, George; Hauck, Larry; Mott, Joanna; Rifai, Hanadi; Srinivasan, Raghavan; Ward, George; Wythe, Kathy

    2009-01-01T23:59:59.000Z

    In September 2006, the Texas Commission on Environmental Quality (TCEQ) and Texas State Soil and Water Conservation Board (TSSWCB) charged a seven-person Bacteria Total Maximum Daily Load (TMDL) Task Force with: * examining approaches...

  4. Force Field Parameter Estimation of Functional Perfluoropolyether Lubricants

    SciTech Connect (OSTI)

    Smith, R.; Chung, P.S.; Steckel, J; Jhon, M.S.; Biegler, L.T.

    2011-01-01T23:59:59.000Z

    The head disk interface in hard disk drive can be considered one of the hierarchical multiscale systems, which require the hybridization of multiscale modeling methods with coarse-graining procedure. However, the fundamental force field parameters are required to enable the coarse-graining procedure from atomistic/molecular scale to mesoscale models .In this paper, we investigate beyond molecular level and perform ab-initio calculations to obtain the force field parameters. Intramolecular force field parameters for the Zdol and Ztetraol were evaluated with truncated PFPE molecules to allow for feasible quantum calculations while still maintaining the characteristic chemical structure of the end groups. Using the harmonic approximation to the bond and angle potentials, the parameters were derived from the Hessian matrix, and the dihedral force constants are fit to the torsional energy profiles generated by a series of constrained molecular geometry optimization.

  5. Fast dynamic force computation for electrostatic and electromagnetic conductors 

    E-Print Network [OSTI]

    Koteeswaran, Prabhavathi

    2005-02-17T23:59:59.000Z

    This thesis presents an improved method for dynamic force computation applicable to both electrostatic and electromagnetic conductors with complex 3D geometries. During the transient simulation of electrostatic actuated MEMS, the positions...

  6. Burnout in forced convection nucleate boiling of water

    E-Print Network [OSTI]

    Reynolds John Mitchell

    1957-01-01T23:59:59.000Z

    Data are presented for burnout in forced coivection nucleate boiling of water at pressures above 500 psia. A dimensionless correlation is devised for. the M.I.T. data which is found to be valid for certain recent data ...

  7. Nuclear forces in the parity odd sector and the LS forces

    E-Print Network [OSTI]

    Keiko Murano; for the HALQCD Collaboration

    2011-12-09T23:59:59.000Z

    In this paper, we report our first attempt at determining NN potentials in the parity odd sector including the spin-orbit force in lattice QCD, employing the method to extract successfully parity even NN potentials from Nambu-Bethe-Salpeter (NBS) wave functions through the Schr\\"odinger equation. Using Nf = 2 CP-PACS gauge configurations on a 16^3 x 32 lattice at a = 0.16 fm and m_\\pi \\cong 1.1 GeV, we calculate central, tensor and spin-orbit potentials in the parity odd sector. Although statistical errors are still large, we observe that the qualitative features of these potentials roughly agree with those of phenomenological potentials.

  8. Casimir forces in a Plasma: Possible Connections to Yukawa Potentials

    E-Print Network [OSTI]

    Barry W. Ninham; Mathias Boström; Clas Persson; Iver Brevik; Stefan Y. Buhmann; Bo E. Sernelius

    2014-09-03T23:59:59.000Z

    We present theoretical and numerical results for the screened Casimir effect between perfect metal surfaces in a plasma. We show how the Casimir effect in an electron-positron plasma can provide an important contribution to nuclear interactions. Our results suggest that there is a connection between Casimir forces and nucleon forces mediated by mesons. Correct nuclear energies and meson masses appear to emerge naturally from the screened Casimir-Lifshitz effect.

  9. Ion pump activity generates fluctuating electrostatic forces in biomembranes

    E-Print Network [OSTI]

    B. Loubet; M. A. Lomholt

    2011-09-19T23:59:59.000Z

    We study the non-equilibrium dynamics of lipid membranes with proteins that actively pump ions across the membrane. We find that the activity leads to a fluctuating force distribution due to electrostatic interactions arising from variation in dielectric constant across the membrane. By applying a multipole expansion we find effects on both the tension and bending rigidity dominated parts of the membranes fluctuation spectrum. We discuss how our model compares with previous studies of force-multipole models.

  10. Measurement of three-point hitch forces on agricultural tractors

    E-Print Network [OSTI]

    Bandy, Steven Morris

    1986-01-01T23:59:59.000Z

    dynamometer to be used as an additional tool in monitoring tractor performance. Phases 1, Z, and 3 have been completed and these were described by Green, et al. ( 1985), Morris ( 1984), and Grogan ( 1985), respectively. Phase 4 is the subject.... The upper link was instrumented for axial force measurement. measured forces were resolved into components based on the measured angle of the hitch. A second three-point hitch dynamometer was investigated that used load sensing clevis pins. These pins...

  11. Using Atom Interferometry to Search for New Forces

    SciTech Connect (OSTI)

    Wacker, Jay G.; /SLAC

    2009-12-11T23:59:59.000Z

    Atom interferometry is a rapidly advancing field and this Letter proposes an experiment based on existing technology that can search for new short distance forces. With current technology it is possible to improve the sensitivity by up to a factor of 10{sup 2} and near-future advances will be able to rewrite the limits for forces with ranges from 100 {micro}m to 1km.

  12. Fast dynamic force computation for electrostatic and electromagnetic conductors

    E-Print Network [OSTI]

    Koteeswaran, Prabhavathi

    2005-02-17T23:59:59.000Z

    FAST DYNAMIC FORCE COMPUTATION FOR ELECTROSTATIC AND ELECTROMAGNETIC CONDUCTORS AThesis by PRABHAVATHI KOTEESWARAN Submitted to the Office of Graduate Studies of Texas A&M University in partial fulfillment of the requirements for the degree... of MASTER OF SCIENCE December 2004 Major Subject: Computer Engineering FAST DYNAMIC FORCE COMPUTATION FOR ELECTROSTATIC AND ELECTROMAGNETIC CONDUCTORS AThesis by PRABHAVATHI KOTEESWARAN Submitted to Texas A&M University in partial fulfillment...

  13. A Nanocrystal Sensor for Luminescence Detection of Cellular Forces

    SciTech Connect (OSTI)

    Choi, Charina; Chou, Jonathan; Lutker, Katie; Werb, Zena; Alivisatos, Paul

    2011-09-29T23:59:59.000Z

    Quantum dots have been used as bright fluorescent tags with high photostability to probe numerous biological systems. In this work we present the tetrapod quantum dot as a dynamic, next-generation nanocrystal probe that fluorescently reports cellular forces with spatial and temporal resolution. Its small size and colloidal state suggest that the tetrapod may be further developed as a tool to measure cellular forces in vivo and with macromolecular spatial resolution.

  14. Dikin-type algorithms for dextrous grasping force optimization

    SciTech Connect (OSTI)

    Buss, M. [Technical Univ. of Munich (Germany). Inst. of Automatic Control Engineering; Faybusovich, L. [Univ. of Notre Dame, IN (United States). Dept. of Mathematics; Moore, J.B. [Australian National Univ., Canberra, Australia Capital Territory (Australia)

    1998-08-01T23:59:59.000Z

    One of the central issues in dextrous robotic hand grasping is to balance external forces acting on the object and at the same time achieve grasp stability and minimum grasping effort. A companion paper shows that the nonlinear friction-force limit constraints on grasping forces are equivalent to the positive definiteness of a certain matrix subject to linear constraints. Further, compensation of the external object force is also a linear constraint on this matrix. Consequently, the task of grasping force optimization can be formulated as a problem with semidefinite constraints. In this paper, two versions of strictly convex cost functions, one of them self-concordant, are considered. These are twice-continuously differentiable functions that tend to infinity at the boundary of possible definiteness. For the general class of such cost functions, Dikin-type algorithms are presented. It is shown that the proposed algorithms guarantee convergence to the unique solution of the semidefinite programming problem associated with dextrous grasping force optimization. Numerical examples demonstrate the simplicity of implementation, the good numerical properties, and the optimality of the approach.

  15. THE OPERATION OF A FORCED TWO PHASE COOLING SYSTEM ON A LARGE SUPERCONDUCTING MAGNET

    E-Print Network [OSTI]

    Green, M.A.

    2010-01-01T23:59:59.000Z

    A FORCED TWO PHASE COOLING SYSTEM ON A LARGE SUPERCONDUCTINGOPERATION O A FORCED T O PHASE COOLING SYSTEM F W O A LARGEof a forced two phase cooling system on a two meter diameter

  16. U.S. - Canada Power System Outage Task Force: Final Report on...

    Broader source: Energy.gov (indexed) [DOE]

    Connecticut and New Jersey, and the Canadian province of Ontario. U.S. - Canada Power System Outage Task Force: Final Report on the Implementation of Task Force...

  17. Reducing the forces required to delimb hardwoods. Forest Service research paper

    SciTech Connect (OSTI)

    Mattson, J.A.; Sturos, J.B.

    1996-01-29T23:59:59.000Z

    Documents the forces required to delimb hardwoods as a function of knife parameters, and identifies opportunities to reduce forces and increase productivity of machines using delimbing knives.

  18. First interim report of the Federal Fleet Conversion Task Force

    SciTech Connect (OSTI)

    Not Available

    1993-08-01T23:59:59.000Z

    The Federal Fleet Conversion Task Force was created by Executive Order 12844, signed by President Clinton on April 21, 1993. In the Order, the President directed that purchases of alternative fueled vehicles by the Federal Government be substantially increased beyond the levels required by current law. The President charged the Task Force with developing recommendations for carrying out the Executive Order, with special emphasis on setting a course that will lead to the widespread use of alternative fueled vehicles by Federal, State, and local government fleets, by private fleets and, ultimately, by individuals. The chief recommendation of the Task Force is the establishment of a Presidential Clean Cities Initiative. To support creation of the Presidential Initiative, the Task Force identified 38 cities and regions, prioritized into three tiers, for concentrating the Initiative`s efforts in Fiscal Years 1994 through 1996. This concentration of effort is key to the effectiveness of the Initiative. The 38 cities and regions would receive priority funding for Federal vehicle purchases and for infrastructure development. In addition, the Task Force has made specific recommendations for overcoming numerous regulatory, economic, and technical barriers that have slowed the introduction of alternative fueled vehicles into general use.

  19. Self-consistent Green's functions with three-body forces

    E-Print Network [OSTI]

    Arianna Carbone

    2014-07-24T23:59:59.000Z

    The present thesis aims at studying the properties of symmetric nuclear and pure neutron matter from a Green's functions point of view, including two-body and three-body chiral forces. An extended self-consistent Green's function formalism is defined to consistently incorporate three-body forces in the many-body calculations. The effect of three-nucleon interactions is included via the construction of a dressed two-body density dependent force. This is obtained performing an average of the leading order three-body terms in the chiral effective field theory expansion. The dressed force corresponds to the use of an in-medium propagator in the average which takes into account the correlations characterizing the system at each stage of the many-body calculation. The total energy of the system is obtained by means of a modified Galitskii-Migdal-Koltun sumrule to correctly account for the effect of three-body forces. Microscopic as well as macroscopic properties of symmetric nuclear and pure neutron matter are analyzed in detailed.

  20. Force-induced rupture of a DNA duplex

    E-Print Network [OSTI]

    Mosayebi, Majid; Doye, Jonathan P K; Ouldridge, Thomas E

    2015-01-01T23:59:59.000Z

    The rupture of double-stranded DNA under stress is a key process in biophysics and nanotechnology. In this article we consider the shear-induced rupture of short DNA duplexes, a system that has been given new importance by recently designed force sensors and nanotechnological devices. We argue that rupture must be understood as an activated process, where the duplex state is metastable and the strands will separate in a finite time that depends on the duplex length and the force applied. Thus, the critical shearing force required to rupture a duplex within a given experiment depends strongly on the time scale of observation. We use simple models of DNA to demonstrate that this approach naturally captures the experimentally observed dependence of the critical force on duplex length for a given observation time. In particular, the critical force is zero for the shortest duplexes, before rising sharply and then plateauing in the long length limit. The prevailing approach, based on identifying when the presence o...

  1. Critical adsorption and critical Casimir forces for geometrically structured confinements

    E-Print Network [OSTI]

    M. Tröndle; L. Harnau; S. Dietrich

    2008-10-31T23:59:59.000Z

    We study the behavior of fluids, confined by geometrically structured substrates, upon approaching a critical point at T = Tc in their bulk phase diagram. As generic substrate structures periodic arrays of wedges and ridges are considered. Based on general renormalization group arguments we calculate, within mean field approximation, the universal scaling functions for order parameter profiles of a fluid close to a single structured substrate and discuss the decay of its spatial variation into the bulk. We compare the excess adsorption at corrugated substrates with the one at planar walls. The confinement of a critical fluid by two walls generates effective critical Casimir forces between them. We calculate corresponding universal scaling functions for the normal critical Casimir force between a flat and a geometrically structured substrate as well as the lateral critical Casimir force between two identically patterned substrates.

  2. Earth's Inner Core dynamics induced by the Lorentz force

    E-Print Network [OSTI]

    Lasbleis, M; Cardin, P; Labrosse, S

    2015-01-01T23:59:59.000Z

    Seismic studies indicate that the Earth's inner core has a complex structure and exhibits a strong elastic anisotropy with a cylindrical symmetry. Among the various models which have been proposed to explain this anisotropy, one class of models considers the effect of the Lorentz force associated with the magnetic field diffused within the inner core. In this paper we extend previous studies and use analytical calculations and numerical simulations to predict the geometry and strength of the flow induced by the poloidal component of the Lorentz force in a neutrally or stably stratified growing inner core, exploring also the effect of different types of boundary conditions at the inner core boundary (ICB). Unlike previous studies, we show that the boundary condition that is most likely to produce a significant deformation and seismic anisotropy is impermeable, with negligible radial flow through the boundary. Exact analytical solutions are found in the case of a negligible effect of buoyancy forces in the inne...

  3. Forced transport of deformable containers through narrow constrictions

    E-Print Network [OSTI]

    Remy Kusters; Thijs van der Heijden; Badr Kaoui; Jens Harting; Cornelis Storm

    2014-11-19T23:59:59.000Z

    We study, numerically and analytically, the forced transport of deformable containers through a narrow constriction. Our central aim is to quantify the competition between the constriction geometry and the active forcing, regulating whether and at which speed a container may pass through the constriction and under what conditions it gets stuck. We focus, in particular, on the interrelation between the force that propels the container and the radius of the channel, as these are the external variables that may be directly controlled in both artificial and physiological settings. We present Lattice-Boltzmann simulations that elucidate in detail the various phases of translocation, and present simplified analytical models that treat two limiting types of these membrane containers: deformational energy dominated by the bending or stretching contribution. In either case we find excellent agreement with the full simulations, and our results reveal that not only the radius but also the length of the constriction determines whether or not the container will pass.

  4. Acceleration of particles in an isotropic random force field

    E-Print Network [OSTI]

    Hector Javier Durand-Manterola

    2012-04-18T23:59:59.000Z

    If we have a particle immersed in a field of random forces, each interaction of the particle with the field can enlarge or diminish its kinetic energy. In this work is shown that in general, for any field of random force with uniform distribution of directions, the probability to gain kinetic energy is larger that the probability to lose it. Therefore, if the particle is submitted to a great number of interactions with the force stochastic field, the final result will be that the particle will gain energy. The probability to gain energy in each interaction is Pg=1/2 (1+T/(2Po)), where T is the impulse given by the field and Po is the momentum of the particle before the interaction. The probability to lose energy in each interaction is Pl=1/2 (1-T/(2Po)).

  5. Determining the role of hydration forces in protein folding

    SciTech Connect (OSTI)

    Sorenson, J.M. [Univ. of California, Berkeley, CA (United States). Dept. of Chemistry] [Univ. of California, Berkeley, CA (United States). Dept. of Chemistry; Hura, G. [Univ. of California, Berkeley, CA (United States)] [Univ. of California, Berkeley, CA (United States); [Lawrence Berkeley National Lab., CA (United States). Life Sciences Div.; Soper, A.K. [Rutherford Appleton Lab., Didcot (United Kingdom). ISIS Facility] [Rutherford Appleton Lab., Didcot (United Kingdom). ISIS Facility; Pertsemlidis, A. [Univ. of Texas Southwestern Medical Center, Dallas, TX (United States). Dept. of Biochemistry] [Univ. of Texas Southwestern Medical Center, Dallas, TX (United States). Dept. of Biochemistry; Head-Gordon, T. [Lawrence Berkeley National Lab., CA (United States)] [Lawrence Berkeley National Lab., CA (United States)

    1999-07-01T23:59:59.000Z

    One of the primary issues in protein folding is determining what forces drive folding and eventually stabilize the native state. A delicate balance exists between electrostatic forces such as hydrogen bonding and salt bridges, and the hydrophobic effect, which are present for both intramolecular protein interactions and intermolecular contributions with the surrounding aqueous environment. This article describes a combined experimental, theoretical, and computational effort to show how the complexity of aqueous hydration can influence the structure, folding and aggregation, and stability of model protein systems. The unification of the theoretical and experimental work is the development or discovery of effective amino acid interactions that implicitly include the effects of aqueous solvent. The authors show that consideration of the full range of complexity of aqueous hydration forces such as many-body effects, long-ranged character of aqueous solvation, and the assumptions made about the degree of protein hydrophobicity can directly impact the observed structure, folding, and stability of model protein systems.

  6. Unitary approach to the quantum forced harmonic oscillator

    E-Print Network [OSTI]

    D. Velasco-Martinez; V. G. Ibarra-Sierra; J. C. Sandoval-Santana; J. L. Cardoso; A. Kunold

    2014-08-31T23:59:59.000Z

    In this paper we introduce an alternative approach to studying the evolution of a quantum harmonic oscillator subject to an arbitrary time dependent force. With the purpose of finding the evolution operator, certain unitary transformations are applied successively to Schr\\"odinger's equation reducing it to its simplest form. Therefore, instead of solving the original Schr\\"odinger's partial differential equation in time and space the problem is replaced by a system of ordinary differential equations. From the obtained evolution operator we workout the propagator. Even though we illustrate the use of unitary transformations on the solution of a forced harmonic oscillator, the method presented here might be used to solve more complex systems. The present work addresses many aspects regarding unitary transformations and the dynamics of a forced quantum harmonic oscillator that should be useful for students and tutors of the quantum mechanics courses at the senior undergraduate and graduate level.

  7. Noninvasive determination of optical lever sensitivity in atomic force microscopy

    SciTech Connect (OSTI)

    Higgins, M.J.; Proksch, R.; Sader, J.E.; Polcik, M.; Mc Endoo, S.; Cleveland, J.P.; Jarvis, S.P. [Centre for Research on Adaptive Nanodevices and Nanostructures (CRANN), University of Dublin, Trinity College, Dublin 2 (Ireland); Asylum Research, 6310 Hollister Ave, Santa Barbara, California 93117 (United States); Department of Mathematics and Statistics, University of Melbourne Victoria, 3010 (Australia); Centre for Research on Adaptive Nanodevices and Nanostructures (CRANN), University of Dublin, Trinity College, Dublin 2 (Ireland); Asylum Research, 6310 Hollister Ave, Santa Barbara, California 93117 (United States); Centre for Research on Adaptive Nanodevices and Nanostructures (CRANN), University of Dublin, Trinity College, Dublin 2 (Ireland)

    2006-01-15T23:59:59.000Z

    Atomic force microscopes typically require knowledge of the cantilever spring constant and optical lever sensitivity in order to accurately determine the force from the cantilever deflection. In this study, we investigate a technique to calibrate the optical lever sensitivity of rectangular cantilevers that does not require contact to be made with a surface. This noncontact approach utilizes the method of Sader et al. [Rev. Sci. Instrum. 70, 3967 (1999)] to calibrate the spring constant of the cantilever in combination with the equipartition theorem [J. L. Hutter and J. Bechhoefer, Rev. Sci. Instrum. 64, 1868 (1993)] to determine the optical lever sensitivity. A comparison is presented between sensitivity values obtained from conventional static mode force curves and those derived using this noncontact approach for a range of different cantilevers in air and liquid. These measurements indicate that the method offers a quick, alternative approach for the calibration of the optical lever sensitivity.

  8. Spin contribution to the ponderomotive force in a plasma

    E-Print Network [OSTI]

    G. Brodin; A. P. Misra; M. Marklund

    2010-07-30T23:59:59.000Z

    The concept of a ponderomotive force due to the intrinsic spin of electrons is developed. An expression containing both the classical as well as the spin-induced ponderomotive force is derived. The results are used to demonstrate that an electromagnetic pulse can induce a spin-polarized plasma. Furthermore, it is shown that for certain parameters, the nonlinear back-reaction on the electromagnetic pulse from the spin magnetization current can be larger than that from the classical free current. Suitable parameter values for a direct test of this effect are presented.

  9. SRS reactor control rod cooling without normal forced convection cooling

    SciTech Connect (OSTI)

    Smith, D.C. (SAIC, Albuquerque, NM (United States)); Easterling, T.C. (Westinghouse Savannah River Co., Aiken, SC (United States))

    1993-01-01T23:59:59.000Z

    This paper describes an analytical study of the coolability of the control rods in the Savannah River site (SRS) K production reactor under conditions of loss of normal forced convection cooling. The study was performed as part of the overall safety analysis of the reactor supporting its restart. The analysis addresses the buoyancy-driven boiling flow over the control rods that occurs when forced cooling is lost. The objective of the study was to demonstrate that the control rods will remain cooled (i.e., no melting) at powers representative of those anticipated for restart of the reactor.

  10. The mechano-chemistry of cytoskeletal force generation

    E-Print Network [OSTI]

    Mirko Maraldi; Krishna Garikipati

    2014-04-23T23:59:59.000Z

    In this communication, we propose a model to study the non-equilibrium process by which actin stress fibers develop force in contractile cells. The emphasis here is on the non-equilibrium thermodynamics, which is necessary to address the mechanics as well as the chemistry of dynamic cell contractility. In this setting we are able to develop a framework that relates (a) the dynamics of force generation within the cell and (b) the cell response to external stimuli to the chemical processes occurring within the cell, as well as to the mechanics of linkage between the stress fibers, focal adhesions and extra-cellular matrix.

  11. A channel Brownian pump powered by an unbiased external force

    E-Print Network [OSTI]

    Bao-quan Ai; Liang-gang Liu

    2010-03-22T23:59:59.000Z

    A Brownian pump of particles in an asymmetric finite tube is investigated in the presence of an unbiased external force. The pumping system is bounded by two particle reservoirs. It is found that the particles can be pumped through the tube from a reservoir at low concentration to one at the same or higher concentration. There exists an optimized value of temperature (or the amplitude of the external force) at which the pumping capacity takes its maximum value. The pumping capacity decreases with increasing the radius at the bottleneck of the tube.

  12. Spatial synchronization and extinction of species under external forcing

    E-Print Network [OSTI]

    R. E. Amritkar; Govindan Rangarajan

    2006-02-20T23:59:59.000Z

    We study the interplay between synchronization and extinction of a species. Using a general model we show that under a common external forcing, the species with a quadratic saturation term in the population dynamics first undergoes spatial synchronization and then extinction, thereby avoiding the rescue effect. This is because the saturation term reduces the synchronization time scale but not the extinction time scale. The effect can be observed even when the external forcing acts only on some locations provided there is a synchronizing term in the dynamics. Absence of the quadratic saturation term can help the species to avoid extinction.

  13. On transition from Alfvén resonance to forced magnetic reconnection

    SciTech Connect (OSTI)

    Luan, Q. [MOE Key Lab of Materials Modification by Beams and School of Physics and Optoelectrical Technology, Dalian University of Technology, Dalian 116024 (China); Wang, X., E-mail: xgwang@hit.edu.cn [Department of Physics, Harbin Institute of Technology, Harbin 150001 (China)

    2014-07-15T23:59:59.000Z

    We revisit the transition from Alfvén resonance to forced magnetic reconnection with a focus on the property of their singularities. As the driven frequency tends to zero, the logarithmic singularity of Alfvén resonance shifts to the power-law singularity of forced reconnection, due to merging of the two resonance layers. The transition criterion depends on either kinetic effects or dissipations that resolve the singularity. As an example, a small but finite resistivity ? is introduced to investigate the transition process. The transition threshold is then obtained as the driven frequency reaches a level of ?O((?/k){sup 1/3})

  14. Wave forces on a large submerged hemispherical object

    E-Print Network [OSTI]

    Snider, Robert Hoyd

    1970-01-01T23:59:59.000Z

    r% 'I'1'e' ' s , cd', ", ". T ', ltd~ D +'i IC TP. ;25 A'. . '1 U 1" \\, E1 M, ~' '-'~, i)=. ' SCTE, '; g 6'7;g Ila)sz Su'i-, -i" -. ~: C~ v ~ ~ ' rc~r, - . ' ' rg ViAi& ' FORC'' S OE A LA( SE SUB':RAGED HE'lXSPBERTCAL OBJECT A Theses ROBERT... Force Load Cell System 16 Resistance Wave Heaght Gage Pressure Transducer 20 23 Experimental Procedure III. THEORETICAL CONSIDERA'1IONS 24 26 Progressive Linear Wave Theory 27 Evaluation of Experimental Data IV. PRESENTATION AND DISCUSSION...

  15. Wave forces on monotower structures fitted with icebreaking cones

    E-Print Network [OSTI]

    Harrington, Michael Gerard

    1987-01-01T23:59:59.000Z

    and Table 5 provides the model dimensions. The cones were attached to the pile section and then sealed to prevent entrapment of water. Data Acquisition. -A Hewlett-Packard (HP) 3497A Data Acquisition System was used to measure wave heights and forces.... the inertial force term. The damping matrix is usually composed of internal, viscous and radiation damping as expressed by [C] = [Ci] + [Cv] + [R] (2. 7) The solution of Equation (2. 5) is found in terms of the relative displacements, therefore the fluid...

  16. Spin Contribution to the Ponderomotive Force in a Plasma

    SciTech Connect (OSTI)

    Brodin, G.; Misra, A. P.; Marklund, M. [Department of Physics, Umeaa University, SE-901 87 Umeaa (Sweden)

    2010-09-03T23:59:59.000Z

    The concept of a ponderomotive force due to the intrinsic spin of electrons is developed. An expression containing both the classical as well as the spin-induced ponderomotive force is derived. The results are used to demonstrate that an electromagnetic pulse can induce a spin-polarized plasma. Furthermore, it is shown that, for certain parameters, the nonlinear backreaction on the electromagnetic pulse from the spin magnetization current can be larger than that from the classical free current. Suitable parameter values for a direct test of this effect are presented.

  17. Wave induced forces on a partially exposed circular cylinder

    E-Print Network [OSTI]

    Parker, Michael Edward

    1977-01-01T23:59:59.000Z

    analyzed to give a dimensionless force which was related to the wave parameters H/L and d/L. Other methods of analysis were also used for the derivation of drag, inertia, and lift coefficients for use with various forms of the Norison Equation. RCKHOI... = Fluid Density A = Area of Hodel u = Horizontal Hater Particle Velocity x In a study conducted by Chakrabarti (9), the data presented by Shank and Herbich were analyzed by a different method, namely a closed form expression for the wave forces. Only...

  18. Work Force Retention Work Group Charter | Department of Energy

    Office of Environmental Management (EM)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level: National5Sales for4,645 3,625 1,006 492 742 33 1112011 Strategic2Uranium TransferonUS-IndiaVALUEWaterWhereChinn Women @Department ofForceForce

  19. An exact solution for the Casimir force in a spherically symmetric medium

    E-Print Network [OSTI]

    Ulf Leonhardt; William M. R. Simpson

    2011-07-03T23:59:59.000Z

    We calculated the force of the quantum vacuum, the Casimir force, in a spherically symmetric medium, Maxwell's fish eye, surrounded by a perfect mirror and derived an exact analytic solution. Our solution questions the idea that the Casimir force of a spherical mirror is repulsive - we found an attractive force that diverges at the mirror.

  20. Verification of the Equilibrium and MHD Stability Codes within the Integrated Tokamak Modeling Task Force

    E-Print Network [OSTI]

    Verification of the Equilibrium and MHD Stability Codes within the Integrated Tokamak Modeling Task Force

  1. Robust control for a class of interval model: application to the force control of piezoelectric cantilevers

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    the second one on force [4][5]. In order to synthesize a controller for the manipulation force, a model is necessary. However, it is known that the model linking this manipulation force and the input controlRobust control for a class of interval model: application to the force control of piezoelectric

  2. Dynamics of Quasi-Geostrophic Fluid Motions with Rapidly Oscillating Coriolis Force

    E-Print Network [OSTI]

    is the viscosity, D9QUR is the Ekman dissipation constant, GH¡!£¦¥3§ is the wind forcing, and V¡XWY¥3`IT6 WI5a and time almost periodic wind forcing, respectively. We assume that fluctuating Coriolis force term )1Dynamics of Quasi-Geostrophic Fluid Motions with Rapidly Oscillating Coriolis Force Hongjun Gao

  3. Force microscopy of layering and friction in an ionic liquid Judith Hotha,b

    E-Print Network [OSTI]

    Mueser, Martin

    shape of the force vs. distance curve is explained by a model for the interaction between tip, gold of the compliant force sensor between branches of the oscillatory force curve. Frictional force between-viscosity, yet load- bearing lubricant [1-4]. The load-bearing ability stems from the formation of solvation

  4. Demonstration of Security Benefits of Renewable Generation at FE Warren Air Force Base

    SciTech Connect (OSTI)

    Warwick, William M.; Myers, Kurt; Seifert, Gary

    2010-12-31T23:59:59.000Z

    Report detailing field demonstration of security benefits of renewable generation at FE Warren Air Force Base.

  5. A Standing Posture Control Based on Ground Reaction Force Satoshi Ito1),2)

    E-Print Network [OSTI]

    Ito, Satoshi

    such as inertial forces, gravitational forces, and ground reaction forces. Among them, we here fo- cus. To achieve it, we design two control laws for each ground reaction force. By alternatively switching them- trol laws are considered. Furthermore, we also study the posture changes by the stationery external

  6. Measurements of dispersion forces between colloidal latex particles with the atomic force microscope and comparison with Lifshitz theory

    SciTech Connect (OSTI)

    Elzbieciak-Wodka, Magdalena; Ruiz-Cabello, F. Javier Montes; Trefalt, Gregor; Maroni, Plinio; Borkovec, Michal, E-mail: michal.borkovec@unige.ch [Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, 30, Quai Ernest-Ansermet, 1205 Geneva (Switzerland)] [Department of Inorganic and Analytical Chemistry, University of Geneva, Sciences II, 30, Quai Ernest-Ansermet, 1205 Geneva (Switzerland); Popescu, Mihail N. [Ian Wark Research Institute, University of South Australia, Mawson Lakes, SA 5095 (Australia)] [Ian Wark Research Institute, University of South Australia, Mawson Lakes, SA 5095 (Australia)

    2014-03-14T23:59:59.000Z

    Interaction forces between carboxylate colloidal latex particles of about 2 ?m in diameter immersed in aqueous solutions of monovalent salts were measured with the colloidal probe technique, which is based on the atomic force microscope. We have systematically varied the ionic strength, the type of salt, and also the surface charge densities of the particles through changes in the solution pH. Based on these measurements, we have accurately measured the dispersion forces acting between the particles and estimated the apparent Hamaker constant to be (2.0 ± 0.5) × 10{sup ?21} J at a separation distance of about 10 nm. This value is basically independent of the salt concentration and the type of salt. Good agreement with Lifshitz theory is found when roughness effects are taken into account. The combination of retardation and roughness effects reduces the value of the apparent Hamaker constant and its ionic strength dependence with respect to the case of ideally smooth surfaces.

  7. Graphene thickness dependent adhesion force and its correlation to surface roughness

    SciTech Connect (OSTI)

    Pourzand, Hoorad [Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112 (United States); Tabib-Azar, Massood, E-mail: azar.m@utah.edu [Electrical and Computer Engineering, University of Utah, Salt Lake City, Utah 84112 (United States); Biomedical Engineering, University of Utah, Salt Lake City, Utah 84112 (United States)

    2014-04-28T23:59:59.000Z

    In this paper, adhesion force of graphene layers on 300?nm silicon oxide is studied. A simple model for measuring adhesion force for a flat surface with sub-nanometer roughness was developed and is shown that small surface roughness decreases adhesion force while large roughness results in an effectively larger adhesion forces. We also show that surface roughness over scales comparable to the tip radius increase by nearly a factor of two, the effective adhesion force measured by the atomic force microscopy. Thus, we demonstrate that surface roughness is an important parameter that should be taken into account in analyzing the adhesion force measurement results.

  8. Detection of Percolating Paths in PMMA/CB Segregated Network Composites Using Electrostatic Force Microscopy and Conductive Atomic Force Microscopy

    SciTech Connect (OSTI)

    Waddell, J. [Georgia Institute of Technology; Ou, R. [Georgia Institute of Technology; Gupta, S. [Georgia Institute of Technology; Parker, A. [Georgia Institute of Technology; Gerhardt, Dr. Rosario [Georgia Institute of Technology; Seal, Katyayani [ORNL; Kalinin, Sergei V [ORNL; Baddorf, Arthur P [ORNL

    2009-01-01T23:59:59.000Z

    Composite specimens possessing polyhedral segregated network microstructures require a very small amount of nanosize filler, <1 vol %, to reach percolation because percolation occurs by accumulation of the fillers along the edges of the deformed polymer matrix particles. In this paper, electrostatic force microscopy (EFM) and conductive atomic force microscopy (C-AFM) were used to confirm the location of the nanosize fillers and the corresponding percolating paths in polymethyl methacrylate/carbon black composites. The EFM and C-AFM images revealed that the polyhedral polymer particles were coated with filler, primarily on the edges as predicted by the geometric models provided.

  9. Business Association Joint Task Force Position on Higher Education December 2010 Business Association Joint Task Force Position on Higher Education December 2010 1

    E-Print Network [OSTI]

    Escher, Christine

    Business Association Joint Task Force Position on Higher Education ­ December 2010 Business Association Joint Task Force Position on Higher Education ­ December 2010 1 Joint Business Association Task Force on Higher Education Summary The four business associations, Associated Oregon Industries, Oregon

  10. Bed topography and the development of forced bed surface patches

    E-Print Network [OSTI]

    Venditti, Jeremy G.

    bars developed and became essentially fixed in space, producing quasisteady state bed topography over in a fixed location for an extended period even after passing considerable bed load flux [Dietrich et alBed topography and the development of forced bed surface patches Peter A. Nelson,1 William E

  11. People Tracking with Human Motion Predictions from Social Forces

    E-Print Network [OSTI]

    Arras, Kai O.

    People Tracking with Human Motion Predictions from Social Forces Matthias Luber Johannes A. Stork Gian Diego Tipaldi Kai O. Arras Abstract-- For many tasks in populated environ- ments, robots need to keep track of current and future motion states of people. Most approaches to people tracking make weak

  12. Urban Consortium Energy Task Force - Year 21 Final Report

    SciTech Connect (OSTI)

    NONE

    2003-04-01T23:59:59.000Z

    The Urban Consortium Energy Task Force (UCETF), comprised of representatives of large cities and counties in the United States, is a subgroup of the Urban Consortium, an organization of the nation's largest cities and counties joined together to identify, develop and deploy innovative approaches and technological solutions to pressing urban issues.

  13. ELECTROMOTION 2009 3D Analytical Calculation of Forces between

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Co or NdFeB, the designers can use magnets owning a really rigid magnetization. They are the magnets whichELECTROMOTION 2009 1 3D Analytical Calculation of Forces between Linear Halbach-Type Permanent Magnet Arrays H. Allag1,2 , J-P. Yonnet1 and M. E. H. Latreche2 1- Laboratoire de Génie Electrique de

  14. Quantized friction force: Lindbladian model satisfying Ehrenfest theorems

    E-Print Network [OSTI]

    Denys I. Bondar; Renan Cabrera; Andre Campos; Herschel A. Rabitz

    2014-12-05T23:59:59.000Z

    We construct a quantum counterpart of classical friction, a dissipative force acting against the direction of motion with the magnitude proportional to particle's velocity. In particular, a Lindblad master equation is derived satisfying the appropriate dynamical relations for observables (i.e., the Ehrenfest theorems). These findings significantly advance a long search for a universal valid Lindbladian model of quantum friction.

  15. Reduction in Work Force Unclassified Staff Office of Human Resources

    E-Print Network [OSTI]

    Howat, Ian M.

    Reduction in Work Force ­ Unclassified Staff 9.15 Office of Human Resources Applies to: Regular by the Health System. Health System employees should contact their human resource department for further information. The Ohio State University ­ Office of Human Resources Page 1 of 1 Policy 9.15 Reduction in Work

  16. Surfzone eddies in strong alongshore currents: Forced or Instabilities?

    E-Print Network [OSTI]

    Frandsen, Jannette B.

    Surfzone eddies in strong alongshore currents: Forced or Instabilities? Falk Feddersen Associate by surfzone 2D turbulent eddies, which have length-scales > the water depth. Our group's results regarding surfzone eddy-induced mixing learned from dye, drifter, theory, and modeling will be reviewed - however

  17. Observations of remote and local forcing in Galveston Bay, Texas 

    E-Print Network [OSTI]

    Guannel, Gregory

    2001-01-01T23:59:59.000Z

    Lcvcl Subtidal Variability. Water Level: Contour Plots, . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Water Level: E/W and N/S Wind Stress. Water Level: SP and SN Wind Stress. . . . . . . . . . . . , . . . . . . . Water Level...: Conclusions. Response of Galveston Bay to Forcing: Water Surface Setup Subtidal Variability. Water Surlace Setup: Contour Plots Water Surl ace Setup: SP and SN Wind Stress. . . . . . . . . Water Surface Setup: Conclusions Response of Galveston Bay...

  18. Stray capacitances in the watt balance operation: electrostatic forces

    E-Print Network [OSTI]

    Quagliotti, Danilo

    2014-01-01T23:59:59.000Z

    In a watt balance, stray capacitances exist between the coil and the magnet. Since the electric current flowing in the coil originates a difference between the coil and magnet electric-potentials, their electrostatic interactions must be taken into account. This paper reports the results of a finite element analysis of the forces acting on the coil.

  19. Furlough or Reduction in Force in the Senior Executive Service

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2003-05-15T23:59:59.000Z

    To establish requirements and assign responsibilities for furlough and reduction in force (RIF) of the Senior Executive Service (SES) in the Department of Energy (DOE) and the National Nuclear Security Administration (NNSA). Cancels O DOE 3350.1 Chg 1 and DOE 3351.2 Chg 1.

  20. Forced vaporization cooling of HVDC thyristor valves. Final report

    SciTech Connect (OSTI)

    Scaringe, R.P.; Staub, F.W.; Lazarek, G.M.; Black, S.H.; Abuaf, N.

    1982-10-01T23:59:59.000Z

    The cooling of power-dissipating devices by boiling Freon R-113 was investigated. Thermohydraulic instability questions were resolved, and it was shown tht the maximum (critical) heat flux available using this coolant in a forced vaporization cooling mode provides sufficient margin for semiconductor device duty cycles. Analytical predictive tools, experimental data, and empirical correlations were developed for design purposes.

  1. Ion Solvation Thermodynamics from Simulation with a Polarizable Force Field

    E-Print Network [OSTI]

    Ponder, Jay

    solvation free energies into distinct cation and anion contributions without reference to an additional solvation free energies for potassium, sodium, and chloride ions in liquid water and formamide-cluster solvation enthalpies, and experimental solvation free energies for whole salts, while the other force fields

  2. An Energy-Based Approach for Contact Force Computation

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    An Energy-Based Approach for Contact Force Computation Fran¸cois Faure Francois.Faure@imag.fr, i. The subsequent iterations consist of global redistributions of energy through the solids in order to restrict widely addressed in computer graphics research. The dynamics equations are now well-known and used

  3. Born-series approach to the calculation of Casimir forces

    E-Print Network [OSTI]

    Robert Bennett

    2014-07-01T23:59:59.000Z

    The Casimir force between two objects is notoriously difficult to calculate in anything other than parallel-plate geometries due to its non-additive nature. This means that for more complicated, realistic geometries one usually has to resort to approaches such as making the crude proximity force approximation (PFA). Another issue with calculation of Casimir forces in real-world situations (such as with realistic materials) is that there are continuing doubts about the status of the standard Lifshitz treatment as a true quantum theory. Here we demonstrate an alternative approach to calculation of Casimir forces for arbitrary geometries which sidesteps both these problems. Our calculations are based upon a Born expansion of the Green's function of the quantised electromagnetic vacuum field, interpreted as multiple scattering, with the relevant coupling strength being the difference in the dielectric functions of the various materials involved. This allows one to consider arbitrary geometries in single or multiple scattering simply by integrating over the desired shape, meaning that extension beyond the PFA is trivial. This work is mostly dedicated to illustration of the method by reproduction of known parallel-slab results -- a process that turns out to be non-trivial and provides several useful insights. We also present a short example of calculation of the Casimir energy for a more complicated geometry, namely that of two finite slabs.

  4. Guide for Establishment of a Contingency Protective Force

    Broader source: Directives, Delegations, and Requirements [Office of Management (MA)]

    2003-03-27T23:59:59.000Z

    The Guide was developed to provide assistance in ensuring continued safe and secure operation of DOE sites and facilities, protection of Departmental employees, and the public in the event of emergency situations involving the establishment and deployment of a contingency protective force and the conduct of sustained operations. Canceled by DOE N 251.80.

  5. Solar Forcing of Regional Climate Change During the

    E-Print Network [OSTI]

    Solar Forcing of Regional Climate Change During the Maunder Minimum Drew T. Shindell,1 Gavin A. Schmidt,1 Michael E. Mann,2 David Rind,1 Anne Waple3 We examine the climate response to solar irradiance long-term solar varia- tion, which would give a larger climate re- sponse (15). Initial conditions were

  6. ELECTROMECHANICAL RELIABILITY TESTING OF THREE-AXIAL SILICON FORCE SENSORS

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    , available automatic test equipment for integrated circuits (ICs) can be leveraged [2]. The reliabilityELECTROMECHANICAL RELIABILITY TESTING OF THREE-AXIAL SILICON FORCE SENSORS S. Spinner1,2, J the measurement results. 1. INTRODUCTION The reliability of microelectromechanical systems (MEMS) receives growing

  7. Analysis and specificities of adhesive forces between microscale and nanoscale

    E-Print Network [OSTI]

    is the packaging of NEMS which require handling, positioning, assembling and joining strategies in the mesoscale of the mesoscale in comparison with nanoscale and microscale. Firstly, it is shown that the distributions are presented. Thirdly, the van der Waals forces are increased by local deformations on the mesoscale contrary

  8. Report of the Task Force on Faculty Diversity and Inclusiveness

    E-Print Network [OSTI]

    Mahon, Bradford Z.

    faculty search committees or to inform search committees themselves on best practices for increasing care demands affect tenure track faculty in unique ways; and many of our peer institutions a more diverse and inclusive institution. In response, the Task Force proposes 31 recommendations

  9. Force measurements in magnetic bearings using fiber optic strain gauges

    E-Print Network [OSTI]

    Raymer, Stephen Geoffrey

    2000-01-01T23:59:59.000Z

    The research presented here develops a new method for measuring forces in magnetic bearings. Fiber-optic strain gauges (FOSGs) mounted to the side of the magnet poles are used to detect the small levels of strain that the metal experiences...

  10. Force-Induced Unzipping Transitions in an Athermal Crowded Environment

    E-Print Network [OSTI]

    Thirumalai, Devarajan

    Force-Induced Unzipping Transitions in an Athermal Crowded Environment David L. Pincus and D was recognized long ago.21 It is now widely appreciated that the cytosol is a crowded heterogeneous medium, and other biological processes in such an environment could be different from what transpires under infinite

  11. Sensorless Robot Collision Detection and Hybrid Force/Motion Control

    E-Print Network [OSTI]

    De Luca, Alessandro

    a lightweight robot design [6], possibly with distributed compliant characteristics in the driving system andSensorless Robot Collision Detection and Hybrid Force/Motion Control Alessandro De Luca Raffaella-time detection of collisions between a robot manipulator and obstacles of unknown geometry and location

  12. Forcing for IZF in Sheaf Toposes Thomas STREICHER

    E-Print Network [OSTI]

    Haller-Dintelmann, Robert

    at the Occasion of his 50th Birthday Abstract In [Sco] D. Scott has shown how the interpretation of intuitionistic set theory IZF in presheaf toposes can be reformulated in a more concrete fashion `a la forcing by external transfinite recursion over the class On of ordinals a sequence P (0) On where P0 (0) = 0 P+1 (0

  13. Cross-National Patterns of Labor Force Withdrawal*

    E-Print Network [OSTI]

    Huang, Jianyu

    stoppage mean receipt of retirement income, and vice versa? ° Does retirement mean full work stoppage, industrialized nations. Between 1950 and 1990, for example, the life expectancies for men and women in the United women) have been leaving the labor force earlier and earlier in these same countries (OECD 1995a, Table

  14. Intercomparison of oceanic and atmospheric forced and coupled mesoscale simulations

    E-Print Network [OSTI]

    Boyer, Edmond

    Intercomparison of oceanic and atmospheric forced and coupled mesoscale simulations Part I: Surface Abstract. A mesoscale non-hydrostatic atmospheric model has been coupled with a mesoscale oceanic model current. In order to analyze the eect of mesoscale coupling, three simulations are compared: the ®rst one

  15. A NEW INTERPHASE FORCE IN TWO-PHASE FLUIDIZED BEDS

    SciTech Connect (OSTI)

    D. ZHANG; W. VANDERHEYDEN

    2001-05-01T23:59:59.000Z

    Mesoscale structures such as particle clusters have been observed both in experiments and in numerical simulations of circulating fluidized beds. In a numerical simulation, in order to account for the effects of such mesoscale structures, the computational grids have to be fine enough. The use of such fine grids is impractical in engineering applications due to excessive computational costs. To predict the macroscopic behavior of a fluidized bed with reasonable computation cost, they perform a second average over the averaged equations for two-phase flows. A mesoscale inter-phase exchange force is found to be the correlation of the particle volume fraction and the pressure gradient. This force is related to the mesoscale added mass of the two-phase flow. Typically, added mass for particle scale interactions is negligible in gas-solid flows since the gas density is small compared to density of solid particles. However, for a mesoscale structure, such as a bubble, the surrounding media is the mixture of gas and particles. The surrounding fluid density experienced by the mesoscale structure is the density of the surrounding mixture. Therefore, the added mass of a mesoscale structure, such as bubbles, cannot be neglected. The property of this new force is studied based on the numerical simulation of a fluidized bed using high grid resolution. It is shown that this force is important in the region where the particle volume fraction is high. The effects of the inhomogeneity to the interphase drag are also studied.

  16. Remote forcing of the Antarctic Circumpolar Current by diapycnal mixing

    E-Print Network [OSTI]

    Johnson, Helen

    of wind energy (1 TW [Wunsch, 2010]) occurs over the Southern Ocean. In contrast, surface buoyancy forcing. Allison,2 H. L. Johnson,3 and D. P. Marshall1 Received 27 January 2011; revised 1 March 2011; accepted 7 by the thermal wind relative to the sea floor. Integrating the thermal wind relation across the ACC, assuming

  17. On Cavitation, Configurational Forces and Implications for Fracture in

    E-Print Network [OSTI]

    Sivaloganathan, J.

    On Cavitation, Configurational Forces and Implications for Fracture in a Nonlinearly Elastic tensile stress can induce cavitation, that is, the appearance of voids that were not previously evident con- sequence of this viewpoint is that cavitation may then take place at a point

  18. MARTIN'S MAXIMUM AND TOWER FORCING SEAN COX AND MATTEO VIALE

    E-Print Network [OSTI]

    Viale, Matteo

    MARTIN'S MAXIMUM AND TOWER FORCING SEAN COX AND MATTEO VIALE Abstract. There are several examples, the Reflection Princi- ple (RP) implies that if I is a tower of ideals which concentrates on the class GIC1 of 1 [16], shows that if PFA+ or MM holds and there is an inaccessible cardinal, then there is a tower

  19. Long-range forces extending from polymer-gel surfaces

    E-Print Network [OSTI]

    Jian-ming Zheng; Gerald H. Pollack

    2003-05-05T23:59:59.000Z

    Aqueous suspensions of microspheres were infused around gels of varying composition. The solutes were excluded from zones on the order of 100 micrometers from the gel surface. We present evidence that this finding is not an artifact, and that solute-repulsion forces exist at distances far greater than conventional theory predicts. The observations imply that solutes may interact over an unexpectedly long range.

  20. Computational Model for Forced Expiration from Asymmetric Normal Lungs

    E-Print Network [OSTI]

    Lutchen, Kenneth

    Computational Model for Forced Expiration from Asymmetric Normal Lungs ADAM G. POLAK 1 losses along the airway branches. Calculations done for succeeding lung volumes result in the semidynamic to the choke points, characteristic differences of lung regional pressures and volumes, and a shape

  1. OSCILLATORY FLOW FORCED CONVECTION IN MICRO HEAT SPREADERS

    E-Print Network [OSTI]

    Beskok, Ali

    transfer devices, micro heat pipes, based on capillary pumping of a multiphase ¯uid in microchannels, have-phase forced convection heat transfer and ¯ow characteristics of water in microchannels, both in the laminar) concept for ef cient transport of large, concentrated heat loads is introduced. The MHS is a single

  2. Methodology A simple linear model for radiative forcing of absorbing

    E-Print Network [OSTI]

    Peters, Karsten

    Absorbing aerosol in cloudy scenes: effects on atmospheric radia7on Aerosol Cloud Cloud prevents aerosol-radiation interaction; small negative forcing, i.e. COOLING Indirect rather than direct effect through modification of cloud properties Cloud enhances "surface albedo"; potentially large

  3. Normal and lateral Casimir forces between deformed plates

    SciTech Connect (OSTI)

    Emig, Thorsten; Hanke, Andreas; Golestanian, Ramin; Kardar, Mehran [Institut fuer Theoretische Physik, Universitaet zu Koeln, Zuelpicher Strasse 77, D-50937 Cologne (Germany); Institut fuer Theoretische Physik, Universitaet Stuttgart, Pfaffenwaldring 57, D-70550 Stuttgart (Germany); Institute for Advanced Studies in Basic Sciences, Zanjan 45195-159 (Iran, Islamic Republic of); Institute for Studies in Theoretical Physics and Mathematics, P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of); Physics Department, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)

    2003-02-01T23:59:59.000Z

    The Casimir force between macroscopic bodies depends strongly on their shape and orientation. To study this geometry dependence in the case of two deformed metal plates, we use a path-integral quantization of the electromagnetic field which properly treats the many-body nature of the interaction, going beyond the commonly used pairwise summation (PWS) of van der Waals forces. For arbitrary deformations we provide an analytical result for the deformation induced change in the Casimir energy, which is exact to second order in the deformation amplitude. For the specific case of sinusoidally corrugated plates, we calculate both the normal and the lateral Casimir forces. The deformation induced change in the Casimir interaction of a flat and a corrugated plate shows an interesting crossover as a function of the ratio of the mean plate distance H to the corrugation length {lambda}: For {lambda}<>H. The amplitude of the lateral force between two corrugated plates which are out of registry is shown to have a maximum at an optimal wavelength of {lambda}{approx_equal}2.5 H. With increasing H/{lambda} > or approx. 0.3 the PWS approach becomes a progressively worse description of the lateral force due to many-body effects. These results may be of relevance for the design and operation of novel microelectromechanical systems (MEMS) and other nanoscale devices.

  4. Polymer Filler Aging and Failure Studied by Lateral Force Microscopy

    SciTech Connect (OSTI)

    Ratto, T; Saab, A P

    2009-05-27T23:59:59.000Z

    In the present work, we study, via force microscopy, the basic physical interactions of a single bead of silica filler with a PDMS matrix both before and after exposure to gamma radiation. Our goal was to confirm our results from last year, and to explore force microscopy as a means of obtaining particle-scale polymer/filler interactions suitable for use as empirical inputs to a computational model consisting of an ensemble of silica beads embedded in a PDMS matrix. Through careful calibration of a conventional atomic force microscope, we obtained both normal and lateral force data that was fitted to yield adhesion, surface shear modulus, and friction of a 1 {micro}m silica bead in contact with PDMS layers of various thickness. Comparison of these terms before and after gamma exposure indicated that initially, radiation exposure lead to softening of the PDMS, but eventually resulted in stiffening. Simultaneously, adhesion between the polymer and silica decreased. This could indicate a serious failure path for filled PDMS exposed to radiation, whereby stiffening of the bulk polymer leads to loss of compressive elastic behavior, while a decrease in polymer filler adhesion results in an increased likelihood of stress failure under load. In addition to further testing of radiation damaged polymers, we also performed FEA modeling of silica beads in a silicone matrix using the shear modulus and adhesion values isolated from the force microscopy experiments as model inputs. The resulting simulation indicated that as a polymer stiffens due to impinging radiation, it also undergoes weakening of adhesion to the filler. The implication is that radiation induces a compound failure mode in filled polymer systems.

  5. CORONAL MASS EJECTION MASS, ENERGY, AND FORCE ESTIMATES USING STEREO

    SciTech Connect (OSTI)

    Carley, Eoin P.; Gallagher, Peter T. [Astrophysics Research Group, School of Physics, Trinity College Dublin, Dublin 2 (Ireland); McAteer, R. T. James [Department of Astronomy, New Mexico State University, Las Cruces, NM 88003-8001 (United States)

    2012-06-10T23:59:59.000Z

    Understanding coronal mass ejection (CME) energetics and dynamics has been a long-standing problem, and although previous observational estimates have been made, such studies have been hindered by large uncertainties in CME mass. Here, the two vantage points of the Solar Terrestrial Relations Observatory (STEREO) COR1 and COR2 coronagraphs were used to accurately estimate the mass of the 2008 December 12 CME. Acceleration estimates derived from the position of the CME front in three dimensions were combined with the mass estimates to calculate the magnitude of the kinetic energy and driving force at different stages of the CME evolution. The CME asymptotically approaches a mass of 3.4 {+-} 1.0 Multiplication-Sign 10{sup 15} g beyond {approx}10 R{sub Sun }. The kinetic energy shows an initial rise toward 6.3 {+-} 3.7 Multiplication-Sign 10{sup 29} erg at {approx}3 R{sub Sun }, beyond which it rises steadily to 4.2 {+-} 2.5 Multiplication-Sign 10{sup 30} erg at {approx}18 R{sub Sun }. The dynamics are described by an early phase of strong acceleration, dominated by a force of peak magnitude of 3.4 {+-} 2.2 Multiplication-Sign 10{sup 14} N at {approx}3 R{sub Sun }, after which a force of 3.8 {+-} 5.4 Multiplication-Sign 10{sup 13} N takes effect between {approx}7 and 18 R{sub Sun }. These results are consistent with magnetic (Lorentz) forces acting at heliocentric distances of {approx}<7 R{sub Sun }, while solar wind drag forces dominate at larger distances ({approx}>7 R{sub Sun }).

  6. Force Control and Nonlinear Master-Slave Force Profile to Manage an Admittance Type Multi-Fingered Haptic User Interface

    SciTech Connect (OSTI)

    Anthony L. Crawford

    2012-08-01T23:59:59.000Z

    Natural movements and force feedback are important elements in using teleoperated equipment if complex and speedy manipulation tasks are to be accomplished in remote and/or hazardous environments, such as hot cells, glove boxes, decommissioning, explosives disarmament, and space to name a few. In order to achieve this end the research presented in this paper has developed an admittance type exoskeleton like multi-fingered haptic hand user interface that secures the user’s palm and provides 3-dimensional force feedback to the user’s fingertips. Atypical to conventional haptic hand user interfaces that limit themselves to integrating the human hand’s characteristics just into the system’s mechanical design this system also perpetuates that inspiration into the designed user interface’s controller. This is achieved by manifesting the property differences of manipulation and grasping activities as they pertain to the human hand into a nonlinear master-slave force relationship. The results presented in this paper show that the admittance-type system has sufficient bandwidth that it appears nearly transparent to the user when the user is in free motion and when the system is subjected to a manipulation task, increased performance is achieved using the nonlinear force relationship compared to the traditional linear scaling techniques implemented in the vast majority of systems.

  7. Radiative forcing in the ACCMIP historical and future climate simulations

    SciTech Connect (OSTI)

    Shindell, Drew; Lamarque, J.-F.; Schulz, M.; Flanner, M. G.; Jiao, C.; Chin, Mian; Young, P. J.; Lee, Y. H.; Rotstayn, Leon; Mahowald, N. M.; Milly, G.; Faluvegi, G.; Balkanski, Y.; Collins, W. J.; Conley, Andrew; Dalsoren, S.; Easter, Richard C.; Ghan, Steven J.; Horowitz, L.; Liu, Xiaohong; Myhre, G.; Nagashima, T.; Naik, Vaishali; Rumbold, S.; Skeie, R. B.; Sudo, K.; Szopa, S.; Takemura, T.; Voulgarakis, A.; Yoon, Jin-Ho; Lo, Fiona

    2013-03-15T23:59:59.000Z

    The Atmospheric Chemistry and Climate Model Intercomparison Project (ACCMIP) examined the short-lived drivers of climate change in current climate models. Here we evaluate the 10 ACCMIP models that included aerosols, 8 of which also participated in the Coupled Model Intercomparison Project phase 5 (CMIP5). The models reproduce present-day total aerosol optical depth (AOD) relatively well, though many are biased low. Contributions from individual aerosol components are quite different, however, and most models underestimate east Asian AOD. The models capture most 1980-2000 AOD trends well, but underpredict increases over the Yellow/Eastern Sea. They strongly underestimate absorbing AOD in many regions. We examine both the direct radiative forcing (RF) and the forcing including rapid adjustments (effective radiative forcing; ERF, including direct and indirect effects). The models’ all-sky 1850 to 2000 global mean annual average total aerosol RF is (mean; range) ?0.26Wm?2; ?0.06 to ?0.49Wm?2. Screening based on model skill in capturing observed AOD yields a best estimate of ?0.42Wm?2; ?0.33 to ?0.50Wm?2, including adjustment for missing aerosol components in some models. Many ACCMIP and CMIP5 models appear to produce substantially smaller aerosol RF than this best estimate. Climate feedbacks contribute substantially (35 to ?58 %) to modeled historical aerosol RF. The 1850 to 2000 aerosol ERF is ?1.17Wm?2; ?0.71 to ?1.44Wm?2. Thus adjustments, including clouds, typically cause greater forcing than direct RF. Despite this, the multi-model spread relative to the mean is typically the same for ERF as it is for RF, or even smaller, over areas with substantial forcing. The largest 1850 to 2000 negative aerosol RF and ERF values are over and near Europe, south and east Asia and North America. ERF, however, is positive over the Sahara, the Karakoram, high Southern latitudes and especially the Arctic. Global aerosol RF peaks in most models around 1980, declining thereafter with only weak sensitivity to the Representative Concentration Pathway (RCP). One model, however, projects approximately stable RF levels, while two show increasingly negative RF due to nitrate (not included in most models). Aerosol ERF, in contrast, becomes more negative during 1980 to 2000. During this period, increased Asian emissions appear to have a larger impact on aerosol ERF than European and North American decreases due to their being upwind of the large, relatively pristine Pacific Ocean. There is no clear relationship between historical aerosol ERF and climate sensitivity in the CMIP5 subset of ACCMIP models. In the ACCMIP/CMIP5 models, historical aerosol ERF of about ?0.8 to ?1.5Wm?2 is most consistent with observed historical warming. Aerosol ERF masks a large portion of greenhouse forcing during the late 20th and early 21st century at the global scale. Regionally, aerosol ERF is so large that net forcing is negative over most industrialized and biomass burning regions through 1980, but remains strongly negative only over east and southeast Asia by 2000. Net forcing is strongly positive by 1980 over most deserts, the Arctic, Australia, and most tropical oceans. Both the magnitude of and area covered by positive forcing expand steadily thereafter.

  8. DESIGN AND CONSTRUCTION OF A FORCE-REFLECTING TELEOPERATION SYSTEM

    SciTech Connect (OSTI)

    M.A. Ebadian, Ph.D.

    1999-01-01T23:59:59.000Z

    For certain applications, such as space servicing, undersea operations, and hazardous material handling tasks in nuclear reactors, the environments can be uncertain, complex, and hazardous. Lives may be in danger if humans were to work under these conditions. As a result, a man-machine system--a teleoperator system--has been developed to work in these types of environments. In a typical teleoperator system, the actual system operates at a remote site; the operator located away from this system usually receives visual information from a video image and/or graphical animation on the computer screen. Additional feedback, such as aural and force information, can significantly enhance performance of the system. Force reflection is a type of feedback in which forces experienced by the remote manipulator are fed back to the manual controller. Various control methods have been proposed for implementation on a teleoperator system. In order to examine different control schemes, a one Degree-Of-Freedom (DOF) Force-Reflecting Manual Controller (FRMC) is constructed and integrated into a PC. The system parameters are identified and constructed as a mathematical model. The Proportional-Integral-Derivative (PID) and fuzzy logic controllers are developed and tested experimentally. Numerical simulation results obtained from the mathematical model are compared with those of experimental data for both types of controllers. In addition, the concept of a telesensation system is introduced. A telesensation system is an advanced teleoperator system that attempts to provide the operator with sensory feedback. In this context, a telesensation system integrates the use of a Virtual Reality (VR) unit, FRMC, and Graphical User Interface (GUI). The VR unit is used to provide the operator with a 3-D visual effect. Various commercial VR units are reviewed and features compared for use in a telesensation system. As for the FRMC, the conceptual design of a 3-DOF FRMC is developed in an effort to make the system portable, compact, and lightweight. A variety of design alternatives are presented and evaluated. Finally, a GUI software package is developed to interface with several teleoperation unit components. These components include an industrial robot, electric motor, encoder, force/torque sensor, and CCD camera. The software includes features such as position scaling, force scaling, and rereferencing and is intended to provide a sound basis for the development of a multi-DOF FRMC system in the future.

  9. Colorado - Report of the Task Force on Statewide Transmission Siting and

    Open Energy Info (EERE)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page onYou are now leaving Energy.gov You are now leaving Energy.gov You are beingZealand JumpConceptual Model, clickInformationNew York: EnergyCoeurLegislative Declaration |

  10. Dynamical Casimir–Polder force on a partially dressed atom in a cavity comprising a dielectric

    SciTech Connect (OSTI)

    Yang, H.; Zheng, T.Y., E-mail: zhengty@nenu.edu.cn; Zhang, X.; Shao, X.Q.; Pan, S.M., E-mail: pansm717@nenu.edu.cn

    2014-05-15T23:59:59.000Z

    We put a two-level atom into a cavity comprising a dielectric with output coupling. An analytical expression of the dynamical Casimir–Polder force in such a system is obtained when the system starts from a partially dressed state. And the effects of several relevant parameters of the system on the time-dependent force are also discussed. -- Highlights: •We get the dynamical CP force on a partially dressed atom in a dielectric cavity. •The force in this cavity is larger than that in infinite dielectric space. •The force is not symmetric with respect to the center of the cavity. •The oscillating time of the force increases with the cavity size.

  11. Spin-Flavor van der Waals Forces and NN interaction

    SciTech Connect (OSTI)

    Alvaro Calle Cordon, Enrique Ruiz Arriola

    2011-12-01T23:59:59.000Z

    A major goal in Nuclear Physics is the derivation of the Nucleon-Nucleon (NN) interaction from Quantum Chromodynamics (QCD). In QCD the fundamental degrees of freedom are colored quarks and gluons which are confined to form colorless strongly interacting hadrons. Because of this the resulting nuclear forces at sufficiently large distances correspond to spin-flavor excitations, very much like the dipole excitations generating the van der Waals (vdW) forces acting between atoms. We study the Nucleon-Nucleon interaction in the Born-Oppenheimer approximation at second order in perturbation theory including the Delta resonance as an intermediate state. The potential resembles strongly chiral potentials computed either via soliton models or chiral perturbation theory and has a van der Waals like singularity at short distances which is handled by means of renormalization techniques. Results for the deuteron are discussed.

  12. Nonlethal weapons as force options for the Army

    SciTech Connect (OSTI)

    Alexander, J.B.

    1994-04-01T23:59:59.000Z

    This paper suggests that future challenges to US national security will be very different from those previously experienced. In a number of foreseeable circumstances, conventional military force will be inappropriate. The National Command Authority, and other appropriate levels of command, need expanded options available to meet threats for which the application of massive lethal force is counterproductive or inadvisable. It is proposed that nonlethal concepts be developed that provide additional options for military leaders and politicians. Included in this initiative should be exploration of policy, strategy, doctrine, and training issues as well as the development of selected technologies and weapons. In addition, civilian law enforcement agencies have similar requirements for less-than-lethal systems. This may be an excellent example for a joint technology development venture.

  13. Arches and contact forces in a granular pile

    E-Print Network [OSTI]

    C. Manuel Carlevaro; Luis A. Pugnaloni

    2012-05-29T23:59:59.000Z

    Assemblies of granular particles mechanically stable under their own weight contain arches. These are structural units identified as sets of mutually stable grains. It is generally assumed that these arches shield the weight above them and should bear most of the stress in the system. We test such hypothesis by studying the stress born by in-arch and out-of-arch grains. We show that, indeed, particles in arches withstand larger stresses. In particular, the isotropic stress tends to be larger for in-arch-grains whereas the anisotropic component is marginally distinguishable between the two types of particles. The contact force distributions demonstrate that an exponential tail (compatible with the maximization of entropy under no extra constraints) is followed only by the out-of-arch contacts. In-arch contacts seem to be compatible with a Gaussian distribution consistent with a recently introduced approach that takes into account constraints imposed by the local force balance on grains.

  14. The Force of a Tsunami on a Wave Energy Converter

    E-Print Network [OSTI]

    O'Brien, Laura; Renzi, Emiliano; Dutykh, Denys; Dias, Frédéric

    2012-01-01T23:59:59.000Z

    With an increasing emphasis on renewable energy resources, wave power technology is fast becoming a realistic solution. However, the recent tsunami in Japan was a harsh reminder of the ferocity of the ocean. It is known that tsunamis are nearly undetectable in the open ocean but as the wave approaches the shore its energy is compressed creating large destructive waves. The question posed here is whether a nearshore wave energy converter (WEC) could withstand the force of an incoming tsunami. The analytical 3D model of Renzi & Dias (2012) developed within the framework of a linear theory and applied to an array of fixed plates is used. The time derivative of the velocity potential allows the hydrodynamic force to be calculated.

  15. Exploration of technologies of use to civil security forces

    SciTech Connect (OSTI)

    Farnum, E.H.; Petrovic, J.J.; McClellan, K.

    1997-10-01T23:59:59.000Z

    This is the final report of a one-year, Laboratory Directed Research and Development (LDRD) project at Los Alamos National Laboratory (LANL). Current civilian security may be enhanced by the use of flexible tile technology. This project explored the use of such materials in three areas: bomb disposal containers, portable armor, and protective vests. In particular, there has been no evaluation of the use of flexible tiles, functional graded ceramics, and ballistic modeling codes in developing improved systems. The state of the art in these three areas was reviewed and potential collaborators were contacted. Civil security forces, both state and Laboratory, were interviewed to determine issues and needs. From a collaboration established with the New Mexico State Police, the authors now know that the technology has the potential to increase protection without adding undue weight and will be usable by civilian police forces for some applications.

  16. Feedback control of inertial microfluidics using axial control forces

    E-Print Network [OSTI]

    Prohm, Christopher

    2014-01-01T23:59:59.000Z

    Inertial microfluidics is a promising tool for many lab-on-a-chip applications. Particles in channel flows with Reynolds numbers above one undergo cross-streamline migration to a discrete set of equilibrium positions in square and rectangular channel cross sections. This effect has been used extensively for particle sorting and the analysis of particle properties. Using the lattice Boltzmann method, we determine equilibrium positions in square and rectangular cross sections and classify their types of stability for different Reynolds numbers, particle sizes, and channel aspect ratios. Our findings thereby help to design microfluidic channels for particle sorting. Furthermore, we demonstrate how an axial control force, which slows down the particles, shifts the stable equilibrium position towards the channel center. Ultimately, the particles then stay on the centerline for forces exceeding a threshold value. This effect is sensitive to particle size and channel Reynolds number and therefore suggests an efficie...

  17. Bistability in quantum nonlinear oscillator excited by stochastic force

    E-Print Network [OSTI]

    Igor Protsenko; Evgenii Protsenko; Alexander Uskov

    2015-01-03T23:59:59.000Z

    We present approximate analytical method of analysis of stationary states of nonlinear quantum systems with the noise. As an example we consider quantum nonlinear oscillator excited by fluctuating force and found parameter regions with more than one stationary solutions. Existence of such region is the necessary condition for bistability. We neglect by fluctuations in the amplitude of oscillations but do not neglect by fluctuations in its phase. Then oscillator noise power spectrum depends on oscillator mean energy n, which leads to nonlinear integral equation for n. Analytical solution of this equation can be found. Stationary states of the oscillator are found for various spectrums of fluctuations of the exciting force. Linear stability analysis of stationary states was carried out.

  18. Eielson Air Force Base Operable Unit 2 baseline risk assessment

    SciTech Connect (OSTI)

    Lewis, R.E.; Jarvis, T.T.; Jarvis, M.R.; Whelan, G.

    1994-10-01T23:59:59.000Z

    Operable Unit 2 at Eielson Air Force Base (AFB) near Fairbanks, is one of several operable units characterized by petroleum, oil, and lubricant contamination, and by the presence of organic products floating at the water table, as a result of Air Force operations since the 1940s. The base is approximately 19,270 acres in size, and comprises the areas for military operations and a residential neighborhood for military dependents. Within Operable Unit 2, there are seven source areas. These source areas were grouped together primarily because of the contaminants released and hence are not necessarily in geographical proximity. Source area ST10 includes a surface water body (Hardfill Lake) next to a fuel spill area. The primary constituents of concern for human health include benzene, toluene, ethylbenzene, and xylenes (BTEX). Monitored data showed these volatile constituents to be present in groundwater wells. The data also showed an elevated level of trace metals in groundwater.

  19. Thermal Issues in Casimir Forces Between Conductors and Semiconductors

    E-Print Network [OSTI]

    K. A. Milton; Iver Brevik; Simen A. Ellingsen

    2012-07-20T23:59:59.000Z

    The Casimir effect between metal surfaces has now been well-verified at the few-percent level experimentally. However, the temperature dependence has never been observed in the laboratory, since all experiments are conducted at room temperature. The temperature dependence for the related Casimir-Polder force between an atom and a bulk material has, in contrast, been observed between a BEC and a silica substrate, with the environment and the silica held at different temperatures. There is a controversy about the temperature dependence for the force between metals, having to do with the magnitude of the linear temperature term for both low and high temperature, the latter being most prominent at large distances. There are also related anomalies pertaining to semiconductors. The status of this controversy, and of the relevant experiments, are reviewed in this report.

  20. Dilution and resonance-enhanced repulsion in nonequilibrium fluctuation forces

    SciTech Connect (OSTI)

    Bimonte, Giuseppe [Dipartimento di Scienze Fisiche, Universita di Napoli Federico II, Complesso Universitario MSA, Via Cintia, I-80126 Napoli (Italy); INFN Sezione di Napoli, I-80126 Napoli (Italy); Emig, Thorsten [Laboratoire de Physique Theorique et Modeles Statistiques, CNRS UMR 8626, Bat. 100, Universite Paris-Sud, F-91405 Orsay cedex (France); Krueger, Matthias; Kardar, Mehran [Massachusetts Institute of Technology, Department of Physics, Cambridge, Massachusetts 02139 (United States)

    2011-10-15T23:59:59.000Z

    In equilibrium, forces induced by fluctuations of the electromagnetic field between electrically polarizable objects (microscopic or macroscopic) in vacuum are generically attractive. The force may, however, become repulsive for microscopic particles coupled to thermal baths with different temperatures. We demonstrate that this nonequilibrium repulsion can be realized also between macroscopic objects, as planar slabs, if they are kept at different temperatures. It is shown that repulsion can be enhanced by (i) tuning of material resonances in the thermal region and by (ii) reducing the dielectric contrast due to ''dilution''. This can lead to stable equilibrium positions. We discuss the realization of these effects for aerogels, yielding repulsion down to submicron distances at realistic porosities.

  1. Mitigated-force carriage for high magnetic field environments

    DOE Patents [OSTI]

    Ludtka, Gerard M; Ludtka, Gail M; Wilgen, John B; Murphy, Bart L

    2014-05-20T23:59:59.000Z

    A carriage for high magnetic field environments includes a first work-piece holding means for holding a first work-piece, the first work-piece holding means being disposed in an operable relationship with a work-piece processing magnet having a magnetic field strength of at least 1 Tesla. The first work-piece holding means is further disposed in operable connection with a second work-piece holding means for holding a second work-piece so that, as the first work-piece is inserted into the magnetic field, the second work-piece is simultaneously withdrawn from the magnetic field, so that an attractive magnetic force imparted on the first work-piece offsets a resistive magnetic force imparted on the second work-piece.

  2. Four-nucleon force in chiral effective field theory

    SciTech Connect (OSTI)

    Evgeny Epelbaum

    2005-10-25T23:59:59.000Z

    We derive the leading contribution to the four--nucleon force within the framework of chiral effective field theory. It is governed by the exchange of pions and the lowest--order nucleon--nucleon contact interaction and includes effects due to the nonlinear pion--nucleon couplings and the pion self interactions constrained by the chiral symmetry of QCD. The resulting 4NF does not contain any unknown parameters and can be tested in future few--and many--nucleon studies.

  3. Nuclear matter equation of state and three-body forces

    SciTech Connect (OSTI)

    Mansour, H. M. M.; Algamoudi, A. M. A. [Cairo University, Physics Department, Faculty of Science (Egypt)

    2012-04-15T23:59:59.000Z

    The energy per particle, symmetry energy, pressure, and free energy are calculated for symmetric nuclear matter using BHF approach with modern nucleon-nucleon CD-Bonn, Nijm1, Argonne v{sub 18}, and Reid 93 potentials. To obtain saturation in nuclear matter we add three-body interaction terms which are equivalent to a density-dependent two-nucleon interaction a la Skyrme force. Good agreement is obtained in comparison with previous theoretical estimates and experimental data.

  4. On the nonlocal properties of relativistic ponderomotive force

    SciTech Connect (OSTI)

    Iwata, Natsumi; Kishimoto, Yasuaki [Graduate School of Energy Science, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)] [Graduate School of Energy Science, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)

    2013-08-15T23:59:59.000Z

    A theory of relativistic ponderomotive force of transversely localized laser fields is presented by taking into account the nonlocal effects that correspond to higher order terms of the expansion parameter ??l/L, i.e., the ratio between particle excursion length and scale length of the field amplitude gradient, while the existing local theory is the first order of ?. As a method for preserving the Hamiltonian structure up to higher orders, we employ the variational principle in noncanonical phase space coordinates incorporated with the Lie transformation. By finding noncanonical coordinates and gauges, we obtain a new formula for the ponderomotive force that involves new terms in the third order represented by the second and third spatial derivatives. The force then depends not only on the local field gradient but also on the curvature and its variation which represent the effects of higher-order nonlocal particle motion. The higher-order terms are found to be subject to the symmetry of the field structure. The obtained formula is accessible to the regime in which the higher derivatives of the field amplitude regulate the interaction. We have applied the formula to laser fields exhibiting flat-top super Gaussian and concave hollow transverse structures which are effective in maintaining the long time scale interaction. The associated nonlocal effects are found to play a key role in determining the interactions. Comparison with the direct integration of the particle orbit demonstrates the validity of the derived formula.

  5. The role of competitive forces in integrated resource planning

    SciTech Connect (OSTI)

    Kahn, E.; Goldman, C.

    1991-10-01T23:59:59.000Z

    In this report, we study the potential for competitive forces to enhance the efficiency of integrated resource planning and produce consumer cost reductions. We examine the efficiency gains from competition in the private power market, and ask whether similar forces can be successful on the demand-side of the market. The goal of this analysis is to identify and elucidate options available to state Public Utility Commissions (PUCs) to support competition in utility demand-side management programs to achieve efficiencies similar to those being achieved through development of competitive forces on the supply-side of the industry. We consider the entire market structure from upstream suppliers to distribution intermediaries to ultimate consumers. The market structure differs substantially between the demand-side and the supply-side of the electricity market. Demand-site electricity markets have a longer distribution chain and more intermediaries than the supply-side, which is attributable in part to the ultimately retail nature of demand and the wholesale nature of supply, and in part indicates market failures.

  6. Detection of secondary phases in duplex stainless steel by magnetic force microscopy and scanning Kelvin probe force microscopy

    SciTech Connect (OSTI)

    Ramírez-Salgado, J. [Instituto Mexicano del Petróleo, Dirección de Investigación y Posgrado, Eje Central Norte Lázaro Cárdenas, No. 152, 07730 D.F., México (Mexico); Domínguez-Aguilar, M.A., E-mail: madoming@imp.mx [Instituto Mexicano del Petróleo, Dirección de Investigación y Posgrado, Eje Central Norte Lázaro Cárdenas, No. 152, 07730 D.F., México (Mexico); Castro-Domínguez, B. [University of Tokyo, Department of Chemical System Engineering, Faculty of Engineering Bldg. 5, 7F 722, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113–8656 (Japan); Hernández-Hernández, P. [Instituto Mexicano del Petróleo, Dirección de Investigación y Posgrado, Eje Central Norte Lázaro Cárdenas, No. 152, 07730 D.F., México (Mexico); Newman, R.C. [University of Toronto, Department of Chemical Engineering and Applied Chemistry, 200 College Street, Toronto M5S 3E5 (Canada)

    2013-12-15T23:59:59.000Z

    The secondary phase transformations in a commercial super duplex stainless steel were investigated by micro-chemical analyses and high resolution scanning probe microscopy. Energy dispersive X-ray and electron probe detected ferrite and austenite as well as secondary phases in unetched aged duplex stainless steel type 25Cr-7Ni-3Mo. Volta potential indicated that nitride and sigma appeared more active than ferrite, while secondary austenite and austenite presented a nobler potential. Reversal order in nobility is thought to be attributable to the potential ranking provided by oxide nature diversity as a result of secondary phase surface compositions on steel. After eutectoid transformation, secondary austenite was detected by electron probe microanalysis, whereas atomic force microscopy distinguished this phase from former austenite by image contrast. Magnetic force microscopy revealed a “ghosted” effect on the latter microstructure probably derived from metal memory reminiscence of mechanical polishing at passivity and long range magnetic forces of ferrite phase. - Highlights: • Nobility detection of secondary phases by SKPFM in DSS particles is not a straightforward procedure. • As Volta potential and contrast are not always consistent SKPFM surface oxides is thought played an important role in detection. • AFM distinguished secondary austenite from former austenite by image contrast though SEM required EPMA.

  7. COCATS 4 task force 7: Training in cardiovascular computed tomographic imaging

    E-Print Network [OSTI]

    2015-01-01T23:59:59.000Z

    COCATS 4 Task Force 7:Training in Cardiovascular ComputedCOCATS 4 Task Force 7:Training in Cardiovascular ComputedA fellow with Level II training should demonstrate a clear

  8. New York Network Members Join Forces to Create Green Jobs | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    York Network Members Join Forces to Create Green Jobs New York Network Members Join Forces to Create Green Jobs Photo of a group of five people standing, looking at the camera....

  9. Design, development, and dynamic characterization of multi-axis force sensing composite footpad

    E-Print Network [OSTI]

    Zhang, Guangtao, S.B. Massachusetts Institute of Technology

    2014-01-01T23:59:59.000Z

    Accurate ground reaction force measurements are important for the development, implementation, and control of high speed legged locomotion robots. From previous research studies, a composite force sensing footpad has been ...

  10. Radiation reaction 4-force: orthogonal or parallel to the 4-velocity?

    E-Print Network [OSTI]

    Calin Galeriu

    2001-08-30T23:59:59.000Z

    In this note we point to some problems related to the standard derivation of the radiation reaction 4-force, and we propose a new expression for this 4-force, parallel to the 4-velocity.

  11. Design and modeling of a force sensitive toothbrush by using a buckling truss structure

    E-Print Network [OSTI]

    Slocum, Jonathan (Jonathan T.)

    2014-01-01T23:59:59.000Z

    Excessive force applied to teeth with a toothbrush during brushing may cause tooth erosion and gum recession. There have been many attempts by others to mitigate this effect with a force-sensitive toothbrush that can alert ...

  12. Empirical Force-Field Assessment: The Interplay Between Backbone Torsions and Noncovalent Term Scaling

    E-Print Network [OSTI]

    Sorin, Eric J.

    Empirical Force-Field Assessment: The Interplay Between Backbone Torsions and Noncovalent Term report, which critically assessed the performance of several contemporary force fields in reproducing of modifying backbone torsions and the scaling of noncovalent interactions. Although these elements determine

  13. Development and testing of an application specific force sensor for snowpack assessment

    E-Print Network [OSTI]

    Whittemore, Samuel Tileston

    2014-01-01T23:59:59.000Z

    Snow penetrometers create a specific application for a force sensor with specifications that are over achieved at great cost when using traditional load cells. A moderately priced, compact force sensor suitable for this ...

  14. Solar Community Comes Out in Full Force for SunShot Grand Challenge...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Solar Community Comes Out in Full Force for SunShot Grand Challenge Summit Solar Community Comes Out in Full Force for SunShot Grand Challenge Summit May 22, 2014 - 9:58am Addthis...

  15. E-Print Network 3.0 - air force aircrew Sample Search Results

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    search results for: air force aircrew Page: << < 1 2 3 4 5 > >> 1 CAPTAIN BENJAMIN H. SMITH Captain Ben Smith is Recruiting Flight Commander for the Air Force Reserve Officer...

  16. Blackout 2003: U.S. - Canada Task Force Presents Final Report...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    U.S. - Canada Task Force Presents Final Report onBlackout of August 2003 Blackout 2003: U.S. - Canada Task Force Presents Final Report onBlackout of August 2003 August 14, 2003,...

  17. Force Tracking With Feed-Forward Motion Estimation for Beating Heart Surgery

    E-Print Network [OSTI]

    Yuen, Shelten G.

    The manipulation of fast-moving, delicate tissues in beating heart procedures presents a considerable challenge to the surgeon. A robotic force tracking system can assist the surgeon by applying precise contact forces to ...

  18. Annular mode-like responses to external forcings in a simple atmospheric general circulation model

    E-Print Network [OSTI]

    Ring, Michael J., 1979-

    2008-01-01T23:59:59.000Z

    In this thesis, I investigate the response of a simple atmospheric general circulation model to applied forcings to learn whether the annular mode patterns are a preferred model response to the forcings. The thesis is ...

  19. Forced-convection surface-boiling heat transfer and burnout in tubes of small diameters

    E-Print Network [OSTI]

    Bergles A. E.

    1962-01-01T23:59:59.000Z

    A basic heat-transfer apparatus was designed and constructed for the study of forced-convection boiling in small channels. The various regions of forced-convection surface boiling were studied experimentally and analytically. ...

  20. Estimation of axial compressor body forces using three-dimensional flow computations

    E-Print Network [OSTI]

    Reichstein, Georg A

    2009-01-01T23:59:59.000Z

    This thesis presents an examination of body force distributions in a single stage low speed compressor. The body force distributions are developed using two different computational procedures, an axisymmetric streamline ...

  1. Does Model Sensitivity to Changes in CO2 Provide a Measure of Sensitivity to Other Forcings?

    E-Print Network [OSTI]

    . In a more recent study (Forest et al. 2006), changes in solar constant, volcanic aerosol, and vegeta- tion forcings on the nature of the forcing has been a subject of a number of recent studies (e.g., Cook

  2. Declaration of Termination of Domestic Partnership Form

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    partner andor any of hisher dependent children are ineligible for Sandia Laboratories health care benefits. Acknowledgements We understand that this may have intended and...

  3. Martin Gogolla: Identifying Objects by Declarative

    E-Print Network [OSTI]

    Gogolla, Martin - Fachbereich 3

    are recorded with their names and population. Branches own a set of cars characterized by a chasis number­called observation term, in order to observe a unique, iden­ tifying property of objects of the corresponding type. 1 property of the object is question. Such an identification number is something which comes from outside

  4. Table of Contents o Declaring a Major

    E-Print Network [OSTI]

    Mohaghegh, Shahab

    and procedures of the Benjamin M. Statler College of Engineering and Mineral Resources for the 2013-2014 academic MountaineerTRAK o Tutoring Help/Resources Available Page 6 o ENGR 463 o Email Communications from Into Curriculum o Global Competency Certificate Page 7 o Official Exchange Programs o How to Get Involved o 4-Year

  5. Event occurs FORMALLY DECLARE EMERGENCY OVER

    E-Print Network [OSTI]

    involved in emergency or recovery operations) 2. Monitor/track progress 3. Stay out of the way ­ Do. Dismiss those not involved a. Remain on standby or in secondary location b. The fewer the better 4

  6. DECLARATION OF MINOR Name __________________________________ID # ____________________________ Class Year _________

    E-Print Network [OSTI]

    Bogaerts, Steven

    concentration (ASTD) _____Biochemistry/Molecular Biology _____Biology _____Business _____Chemistry _____Cinema Studies (CINE) _____Communication _____Computational Science _____Computer Science _____Creative Writing _____Entrepreneurship (ENTR) _____Environmental Studies--Earth Science (ERTH) _____Environmental Studies--LIFE Science

  7. North East Scotland Climate Change Partnership Declaration

    E-Print Network [OSTI]

    Levi, Ran

    demand and emissions of carbon dioxide and other greenhouse gases · be involved in developing and ready; · there are business and other opportunities which will benefit the area as well as challenges to face; · to mitigate to take up opportunities · play its part in addressing this global issue - "think global, act local

  8. Declaration Of Trust | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative Fuels Data Center Home Page on Google Bookmark EERE: Alternative Fuels Data Center Home Page on Delicious Rank EERE: Alternative FuelsNovember 13, 2014ContributingDOE ContractDepartment

  9. [DRAFT] DECLARATION OF BEST PRACTICES FOR

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    AFDC Printable Version Share this resource Send a link to EERE: Alternative Fuels Data Center Home Page to someone by E-mail Share EERE: Alternative Fuels Data Center Home Page on Facebook Tweet about EERE: Alternative Fuels Data Center Home Page on Twitter Bookmark EERE: Alternative1 First Use of Energy for All Purposes (Fuel and Nonfuel), 2002; Level:Energy: Grid Integration Redefining What'sis Taking Over OurThe Iron SpinPrincetonUsingWhatY-12Zero Energy Ready Home4 of 7]:US

  10. Electron Diamagnetic Effect on Axial Force in an Expanding Plasma: Experiments and Theory

    SciTech Connect (OSTI)

    Takahashi, Kazunori [Space Plasma, Power and Propulsion Laboratory, Research School of Physics and Engineering, Australian National University, Canberra ACT 0200 (Australia); Department of Electrical Engineering and Computer Science, Iwate University, Morioka 020-8551 (Japan); Lafleur, Trevor; Charles, Christine; Alexander, Peter; Boswell, Rod W. [Space Plasma, Power and Propulsion Laboratory, Research School of Physics and Engineering, Australian National University, Canberra ACT 0200 (Australia)

    2011-12-02T23:59:59.000Z

    The axial force imparted from a magnetically expanding current-free plasma is directly measured for three different experimental configurations and compared with a two-dimensional fluid theory. The force component solely resulting from the expanding field is directly measured and identified as an axial force produced by the azimuthal current due to an electron diamagnetic drift and the radial component of the magnetic field. The experimentally measured forces are well described by the theory.

  11. Measurement of the Hydrophobic Force in a Soft Matter System Supporting Information Supporting Information for

    E-Print Network [OSTI]

    Chan, Derek Y C

    Measurement of the Hydrophobic Force in a Soft Matter System ­ Supporting Information 1 Supporting Information for "Measurement of the Hydrophobic Force in a Soft Matter System" Rico F. Tabor*1 , Chu Wu2.tabor@monash.edu and d.chan@unimelb.edu.au #12;Measurement of the Hydrophobic Force in a Soft Matter System ­ Supporting

  12. Electromagnetism-like Mechanism with Force Decay Rate Great Deluge for the Course Timetabling Problem

    E-Print Network [OSTI]

    McCollum, Barry

    Electromagnetism-like Mechanism with Force Decay Rate Great Deluge for the Course Timetabling called Electromagnetism-like mechanism with force decay rate great deluge algorithm for university course on these benchmark problems. Keywords: Electromagnetism-like mechanism, force decay rate great deluge, course

  13. Effects Of Training Examples On Student Understanding Of Force And Motion

    E-Print Network [OSTI]

    Heckler, Andrew F.

    that an object experiencing a non-zero net force must have a non-zero velocity parallel to that net force the relationship between the directions of net force, velocity, and acceleration. Six training conditions were and the belief that a non-zero acceleration im- plies a non-zero velocity. Recently, Rosenblatt and Heck- ler [8

  14. owi'3:%l OORNL/CON-75 Effect of Forced Ventilation on

    E-Print Network [OSTI]

    Oak Ridge National Laboratory

    owi'3:%l OORNL/CON-75 Effect of Forced Ventilation on House Infiltration *CARBIDE W. P. Levins #12-eng-26 Energy Division EFFECT OF FORCED VENTILATION ON HOUSE INFILTRATION W. P. Levins DEPARTMENT 1980). v #12;EFFECT OF FORCED VENTILATION OF HOUSE INFILTRATION W. P. Levins Energy Division ABSTRACT

  15. Measurements of the force fields within an acoustic standing wave using holographic optical tweezers

    SciTech Connect (OSTI)

    Bassindale, P. G.; Drinkwater, B. W. [Faculty of Engineering, Queens building, University of Bristol, Bristol BS8 1TR (United Kingdom); Phillips, D. B. [Department of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ (United Kingdom); Barnes, A. C. [Department of Physics, H.H.Wills Physics Laboratory, University of Bristol, Tyndall Avenue, Bristol BS8 1TL (United Kingdom)

    2014-04-21T23:59:59.000Z

    Direct measurement of the forces experienced by micro-spheres in an acoustic standing wave device have been obtained using calibrated optical traps generated with holographic optical tweezers. A micro-sphere, which is optically trapped in three dimensions, can be moved through the acoustic device to measure forces acting upon it. When the micro-sphere is subjected to acoustic forces, it's equilibrium position is displaced to a position where the acoustic forces and optical forces are balanced. Once the optical trapping stiffness has been calibrated, observation of this displacement enables a direct measurement of the forces acting upon the micro-sphere. The measured forces are separated into a spatially oscillating component, attributed to the acoustic radiation force, and a constant force, attributed to fluid streaming. As the drive conditions of the acoustic device were varied, oscillating forces (>2.5 pN{sub pp}) and streaming forces (<0.2 pN) were measured. A 5??m silica micro-sphere was used to characterise a 6.8?MHz standing wave, ??=?220??m, to a spatial resolution limited by the uncertainty in the positioning of the micro-sphere (here to within 2?nm) and with a force resolution on the order of 10 fN. The results have application in the design and testing of acoustic manipulation devices.

  16. Method for measurement of friction forces on single cells in microfluidic devices

    E-Print Network [OSTI]

    Ma, Hongshen

    both dry and wet conditions, are well estab- lished.16,17 The measurement of friction at micrometer the friction between dry microscopic surfaces, including atomic force microscopy, fric- tion-force microscopyMethod for measurement of friction forces on single cells in microfluidic devices Lazar

  17. Thermophoretic and ponderomotive forces in a linear cluster of particles Yu. Dolinsky* and T. Elperin

    E-Print Network [OSTI]

    Elperin, Tov

    Thermophoretic and ponderomotive forces in a linear cluster of particles Yu. Dolinsky* and T; published 21 November 2001 We investigate amplification of thermophoretic and ponderomotive forces caused fluid, and the thermophoretic force when the particles remain stationary due to the applied constraint

  18. Control of Fingertip Forces in Multidigit Manipulation J. RANDALL FLANAGAN,1

    E-Print Network [OSTI]

    Flanagan, Randy

    Control of Fingertip Forces in Multidigit Manipulation J. RANDALL FLANAGAN,1 MAGNUS K. O. BURSTEDT, Magnus K. O. Burstedt, and Roland S. Johansson. Control of fingertip forces in multidigit manipulation. J. Neurophysiol. 81: 1706­1717, 1999. Previous studies of control of fingertip forces in skilled manipulation have

  19. Modeling and Control of Multi-Contact Centers of Pressure and Internal Forces in Humanoid Robots

    E-Print Network [OSTI]

    Sentis, Luis

    Modeling and Control of Multi-Contact Centers of Pressure and Internal Forces in Humanoid Robots loops and exploit the virtual linkage model to develop a controller that guides internal force behavior on modeling multi- grasp behaviors and the associated internal forces acting between manipulators [14]. Using

  20. Modelling and H force control of a nonlinear piezoelectric Micky Rakotondrabe, Yassine Haddab and Philippe Lutz

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    is the modelling and the control of the manipulation force applied to a micro-object by a piezoelectric cantileverModelling and H force control of a nonlinear piezoelectric cantilever Micky Rakotondrabe, Yassine performances whatever the manipulated object is. We present in this paper the control of the force applied

  1. Validity of Wind Load Distribution based on High Frequency Force Balance Measurements

    E-Print Network [OSTI]

    Chen, Xinzhong

    Validity of Wind Load Distribution based on High Frequency Force Balance Measurements Xinzhong Chen such a modal analysis procedure for background and resonant response, estimation of the generalized wind force is the critical element for response prediction. The generalized wind force can be characterized through

  2. Evaluating Southern Ocean Response to Wind Forcing Sarah T. Gille \\Lambda

    E-Print Network [OSTI]

    Gille, Sarah T.

    Evaluating Southern Ocean Response to Wind Forcing Sarah T. Gille \\Lambda School of Environmental author: Gille 1 Evaluating Southern Ocean Response to Wind Forcing Sarah T. Gille \\Lambda School Circumpolar Current (ACC) responds to changes in wind forcing, cross coherences are calculated between

  3. STEADY-STATE CIRCULATIONS FORCED BY DIABATIC HEATING AND WIND STRESS IN THE INTERTROPICAL CONVERGENCE ZONE

    E-Print Network [OSTI]

    Schubert, Wayne H.

    THESIS STEADY-STATE CIRCULATIONS FORCED BY DIABATIC HEATING AND WIND STRESS IN THE INTERTROPICAL-STATE CIRCULATIONS FORCED BY DIABATIC HEATING AND WIND STRESS IN THE INTERTROPICAL CONVERGENCE ZONE A number. The model is forced by prescribed diabatic heating and boundary layer wind stress curl. The circulations

  4. Growth and dissipation of wind-forced, deep water waves Journal: Journal of Fluid Mechanics

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Growth and dissipation of wind-forced, deep water waves Journal: Journal of Fluid Mechanics AND DISSIPATION OF WIND-FORCED, DEEP WATER WAVES Laurent Grare1, , William L. Peirson2 , Hubert Branger1 , James W to the interface with corresponding form drag measurements above wind-forced freely-propagating waves. The drag

  5. Eddy Heat Flux in the Southern Ocean: Response to Variable Wind Forcing ANDREW MCC. HOGG

    E-Print Network [OSTI]

    Miami, University of

    Eddy Heat Flux in the Southern Ocean: Response to Variable Wind Forcing ANDREW MCC. HOGG Australian processes. The authors also test the model response to long-term changes in wind forcing, including steadily1925.1 © 2008 American Meteorological Society #12;Given the dominant role of wind forcing in the South

  6. Flooding/storm/gale Force Wind Remove Anyone From Immediate Danger If Safe To Do So

    E-Print Network [OSTI]

    Hickman, Mark

    Flooding/storm/gale Force Wind Remove Anyone From Immediate Danger If Safe To Do So Flooding 1/gale Force Wind 1. Move all people away from windows. 2. Close all curtains, drapes and blinds. 3. Shelter. If using a mobile phone, DiAl 0800 823-637. Flooding/storm/gale Force Wind #12;

  7. Assessing ocean-model sensitivity to wind forcing uncertainties I. Andreu Burillo,1

    E-Print Network [OSTI]

    Assessing ocean-model sensitivity to wind forcing uncertainties I. Andreu Burillo,1 G. Caniaux,1 M-equation open-ocean model, induced by uncertainties in wind forcing. Statistics calculated from an ensemble-model sensitivity to wind forcing uncertainties, Geophys. Res. Lett., 29(18), 1858, doi:10.1029/2001GL014473, 2002

  8. Rogue Waves 2008, 1314 October 2008, Brest, France WIND-FORCED MODULATIONS OF GRAVITY WAVES

    E-Print Network [OSTI]

    Paris-Sud XI, Université de

    Rogue Waves 2008, 13­14 October 2008, Brest, France WIND-FORCED MODULATIONS OF GRAVITY WAVES S in deep water of weakly nonlinear packets of surface gravity waves under wind forcing is derived. Stokes Theoretically, some progress has been made recently for modulational instability under wind forcing [9]. Let (x

  9. Present-day climate forcing and response from black carbon Mark G. Flanner,1

    E-Print Network [OSTI]

    Zender, Charles

    forcing from all sources (fossil fuel, biofuel, and biomass burning) of +0.054 (0.007­0.13) and +0.049 (0.007­0.12) W mÀ2 , respectively. Snow forcing from only fossil fuel + biofuel sources is +0.043 W mÀ2 (forcing

  10. Sensors and Actuators A xxx (2004) xxxxxx Micromachined silicon force sensor based on diffractive optical

    E-Print Network [OSTI]

    Quake, Stephen R.

    2004-01-01T23:59:59.000Z

    that is designed to only be sensitive to axial deflections of the probe. The optical-encoder force sensor exhibits­membrane interactions under various physiological conditions. The force sensor is an optical encoder based on transSensors and Actuators A xxx (2004) xxx­xxx Micromachined silicon force sensor based on diffractive

  11. Acting alone: U.S. unilateral uses of force, military revolutions, and hegemonic stability theory

    E-Print Network [OSTI]

    Podliska, Bradley Florian

    2009-06-02T23:59:59.000Z

    1989 Panama Invasion (Unilateral Case)........................239 Conclusion.......................................................................251 VIII CONCLUSION...........................................................................253..........................................140 7.1 Sequential Model of Bush?s Gulf War Use of Force Decision Making..210 7.2 Sequential Model of Kennedy?s Use of Force Decision Making............234 7.3 Sequential Model of Bush?s Panama Use of Force Decision Making....247 x...

  12. Noxious Weed Survey of the U.S. Air Force Academy and

    E-Print Network [OSTI]

    Noxious Weed Survey of the U.S. Air Force Academy and Farish Outdoor Recreation Area Colorado 80523 http://www.cnhp.colostate.edu April 15, 2003 Prepared For: U.S. Air Force Academy Department ................................................................................................... 5 OTHER RESEARCH AT THE U.S. AIR FORCE ACADEMY AND FARISH OUTDOOR RECREATION AREA

  13. USING CORIOLIS FORCE TO FACILITATE MOLECULAR TRANSPORTATION AND FLUID MIXING IN CD MICROFLUIDICS

    E-Print Network [OSTI]

    Kassegne, Samuel Kinde

    e. USING CORIOLIS FORCE TO FACILITATE MOLECULAR TRANSPORTATION AND FLUID MIXING IN CD MICROFLUIDICS Coriolis Force to Facilitate Molecular Transportation and Fluid Mixing in CD Microfluidics Platform and Fluid mixing in compact disk (CD) microfluidic platform where centrifugal force is used as the driving

  14. Non-Kyoto Radiative Forcing in Long-Run Greenhouse Gas Emissions and Climate Change Scenarios

    SciTech Connect (OSTI)

    Rose, Steven K.; Richels, Richard G.; Smith, Steven J.; Riahi, Keywan; Stefler, Jessica; Van Vuuren, Detlef

    2014-04-27T23:59:59.000Z

    Climate policies designed to achieve climate change objectives must consider radiative forcing from the Kyoto greenhouse gas, as well as other forcing constituents, such as aerosols and tropospheric ozone. Net positive forcing leads to global average temperature increases. Modeling of non-Kyoto forcing is a relatively new component of climate management scenarios. Five of the nineteen models in the EMF-27 Study model both Kyoto and non-Kyoto forcing. This paper describes and assesses current non-Kyoto radiative forcing modeling within these integrated assessment models. The study finds negative forcing from aerosols masking significant positive forcing in reference non-climate policy projections. There are however large differences across models in projected non-Kyoto emissions and forcing, with differences stemming from differences in relationships between Kyoto and non-Kyoto emissions and fundamental differences in modeling structure and assumptions. Air pollution and non-Kyoto forcing decline in the climate policy scenarios. However, non-Kyoto forcing appears to be influencing mitigation results, including allowable carbon dioxide emissions, and further evaluation is merited. Overall, there is substantial uncertainty related to non-Kyoto forcing that must be considered.

  15. Convection in Arc Weld Pools Electromagnetic and surface tension forces are shown to

    E-Print Network [OSTI]

    Eagar, Thomas W.

    Convection in Arc Weld Pools Electromagnetic and surface tension forces are shown to dominate flow tension forces. It is shown that the electromag- netic and surface tension forces domi- nate the flow by experimental measurements of segrega- tion in the weld pool. It is also shown that the surface tension driven

  16. MEASUREMENT BASED DETERMINATION OF AEROSOL FORCINGS AT ARM SITES: PROPOSED JOINT ASP-ARM STUDY

    E-Print Network [OSTI]

    of aerosol forcings. The dimmed forcings would not be determined -- no indirect aerosol effect in cloud free Stephen E. Schwartz For presentation at the Atmospheric Radiation Measurement (ARM) Program Science Team) Atmospheric Radiation Measurement (ARM) Southern Great Plains (SGP) site. There are numerous aerosol forcings

  17. Wave force coefficient correlation based on wake volume scaling

    SciTech Connect (OSTI)

    Horton, T.E.; Feifarek, M.J.; Golestanian, H. (Univ. of Mississippi, Oxford, MS (United States). School of Engineering)

    1994-05-01T23:59:59.000Z

    A correlation of the hydrodynamic drag force on a cylinder for a periodic motion is demonstrated. The correlation indicates the dependence of the unsteady flow drag coefficient on the wake volume parameter. This parameter is a measure of the volume of flow through the boundary layer and into the wake in a half-cycle. For a laminar boundary layer, this dimensionless parameter is proportional to the Keulegan-Carpenter number and inversely proportional to the square root of the Reynolds number. Using wake volume scaling, drag coefficients were effectively collapsed into a single curve.

  18. Thermal calibration of photodiode sensitivity for atomic force microscopy

    SciTech Connect (OSTI)

    Attard, Phil; Pettersson, Torbjoern; Rutland, Mark W. [School of Chemistry F11, University of Sydney, NSW 2006 Australia (Australia); Department of Chemistry, Royal Institute of Technology, SE-100 44 Stockholm, Sweden and Institute for Surface Chemistry, Box 5607, SE-114 86 Stockholm (Sweden)

    2006-11-15T23:59:59.000Z

    The photodiode sensitivity in the atomic force microscope is calibrated by relating the voltage noise to the thermal fluctuations of the cantilever angle. The method accounts for the ratio of the thermal fluctuations measured in the fundamental vibration mode to the total, and also for the tilt and extended tip of the cantilever. The method is noncontact and is suitable for soft or deformable surfaces where the constant compliance method cannot be used. For hard surfaces, the method can also be used to calibrate the cantilever spring constant.

  19. The force exerting on cosmic bodies in a quaternionc field

    E-Print Network [OSTI]

    V. Majernik

    2003-09-03T23:59:59.000Z

    The expression of a time-dependent cosmological constant $\\lambda \\propto 1/t^2$ is interpreted as the energy density of a special type of the quaternionic field. The Lorenz-like force acting on the moving body in the presence of this quaternionic field is determined. The astronomical and terrestrial effects of this field are presented, and the ways how it can be observably detected is discussed. Finally, a new mechanism of the particle creation and an alternative cosmological scenario in the presence of the cosmic quatertionic field is suggested.

  20. A forced baroclinic vortex around a hydorthermal plume

    SciTech Connect (OSTI)

    Speer, K.G. (Institut Francais de Recherche pour l'Exploitation de la Mer, Brest (France))

    1989-05-01T23:59:59.000Z

    A steady, frictional flow around a hydrothermal plume is described which is forced by the entrainment of water into the buoyant part of the plume as it rises above its source. The circulation is anticyclonic (clockwise in the northern hemisphere) near the equilibrium density level or spreading level of plume, and cyclonic below this level. The strength of this flow line is adequate to trap anomalous properties from the hydrothermal fluid near the source in the presence of weak background flow. Some observational support for such a flow is presented.