Toward XML Representation of NSS Simulation Scenario for Mission Scenario Exchange Capability

DTIC Science & Technology

2003-09-01

app.html Deitel , H. M., Deitel , P. J., Nieto, T. R., Lin, T. M., Sadhu, P. (2001). XML How to Program . Upper Saddle River: Prentice Hall...Combat XXI Program ...........................13 2. Transition NSS to a Java Environment ...........................................13 3. Shift to an...STATEMENT The Naval Simulation System (NSS) is a powerful computer program developed by the Navy to provide a force-on-force modeling and simulation

Assessing the Potential Value of Semantic Web Technologies in Support of Military Operations

DTIC Science & Technology

2003-09-01

Teleconference). Deitel , P. J. (2002). Java, How to Program , Fourth Edition. Upper Saddle River, New Jersey: Prentice-Hall, Inc. Description Logics... how clients connect with each other to form an impromptu community. Jini™ lets programs use services in a network without knowing anything about the...another runtime program (execution engine) to determine how the computer should do it. Declarative programming is very different from the traditional

Synthesis of Nonlinear Guidance Laws for Missiles with Uncertain Dynamics

DTIC Science & Technology

2007-11-01

and Astronautics, Progress in Astronautics and Aeronautics, Volume 199, 2002. 2. Gurfil , M. Jodorkovsky and M. Guelman, Neoclassical Guidance for...658-666, July-August 2002. 19. P. Gurfil , “Robust Guidance for Electro-Optical Missiles,” IEEE Transactions on Aerospace and Electronic Systems, Vol...edition, Upper Saddle River, NJ: Prentice-Hall, 2002. 23. P. Gurfil , ”Zero-Miss Distance Guidance Law Based on Line-of-Sight Rate Measuremenbt Only

Understanding the Institutional Dimension of Inter-Agency Collaboration: The Basic Model

DTIC Science & Technology

2012-10-01

period (2009- 2012]. Dacin, M.T., Goodstein, J. and W. R. Scott, “ Institutional Theory and Institutional Change” Introduction to the Special...Zucher, “The Institutionalization of Institutional Theory ”, in S. Clegg, C. Hardy and W.R. Nord (eds) Handbook of Organizational Studies, (1996...and open systems (5th ed.) Upper Saddle River, NJ: Prentice-Hall, p. 270. Scott, W.R., “Approaching adulthood: the maturing of institutional

Structuring Z Specifications with Views

DTIC Science & Technology

1994-03-01

Gregory Abowd, Michael Jackson , Jeannette Wing, Michal Young and Pamela Zave, who gave me helpful comments on drafts of this pa- per. I am also grateful to...1988. Uac94] Michael Jackson , "Software Development Method", in A Classical Mind: Essays in Honour of C.A.R Hoare, ed. A.W Roscoe, Prentice Hall...International, 1994. ,0 26 [Jon86] Cliff B. Jones, Systematic Software Development Using VDM, Prentice Hall International, 1986. [JZ93] Michael Jackson and

Web-Based 3D Technology for Scenario Authoring and Visualization: The Savage Project

DTIC Science & Technology

2001-01-01

T. M., & Sadhu, P. (2001). XML How to Program . Upper Saddle River, New Jersey: Prentice Hall. Foley, J. D., van Dam, A., Feiner, S. K., & Hughes...Following graduation from NPS in September 2001, Major Nicklaus will be assigned to the Marine Air-Ground Task Force (MAGTF) Staff Training Program ...goal is to accelerate the worldwide demand for products based on these standards through the sponsorship of market and user education programs . The

An XML-Based Mission Command Language for Autonomous Underwater Vehicles (AUVs)

DTIC Science & Technology

2003-06-01

P. XML: How To Program . Prentice Hall, Inc. Upper Saddle River, New Jersey, 2001 Digital Signature Activity Statement, W3C www.w3.org/Signature...languages because it does not directly specify how information is to be presented, but rather defines the structure (and thus semantics) of the...command and control (C2) aspects of using XML to increase the utility of AUVs. XML programming will be addressed. Current mine warfare doctrine will be

Advanced Organic Chemistry: Reactions and Mechanisms (by Bernard Miller)

NASA Astrophysics Data System (ADS)

Berger, Daniel

1998-12-01

Prentice Hall: Upper Saddle River, NJ, 1998. 338 pp, index. ISBN 0-13-373275-4. $59.00. Recently several short texts on intermediate organic chemistry have been published, intended for use in one-term courses for advanced undergraduates and for graduate students who need more background before taking a graduate-level course. These books fill a need not fully met by graduate-level texts such as Lowry and Richardson's Mechanism and Theory in Organic Chemistry or Carey and Sundberg's Advanced Organic Chemistry.

An Approach for the Adaptive Solution of Optimization Problems Governed by Partial Differential Equations with Uncertain Coefficients

DTIC Science & Technology

2012-05-01

Acad. Sci. Fennicae. Ser. A. I. Math.-Phys., 1947(37):79, 1947. [65] G. E. Karniadakis, C.-H. Su, D. Xiu, D. Lucor, C. Schwab, and R. A. Todor ...treatment of uncertainties in aerodynamic design. AIAA Journal, 47(3):646–654, 2009. [106] C. Schwab and R. A. Todor . Karhunen-Loève approximation of random...integrals. Prentice-Hall Inc., Englewood Cliffs, N.J., 1971. Prentice-Hall Series in Automatic Computation. [113] R. A. Todor and C. Schwab

Effects of Various Shaped Roughness Elements in Two-Dimensional High Reynolds Number Turbulent Boundary Layers

DTIC Science & Technology

2004-08-28

CN u-- 9 0 Cu I4 -M CM 4C -A -A - f +U 0 +. 0. U 0 - 0 00000O00000 INI 040 C.)) U, *7 70 0 C 0 0 0 -’U 000000000 N 0 o, ?’ "b LQA C -A A +, L0 M...Aerodynamics, 28:291-300. Schetz, J.A., (1993), "Boundary Layer Analysis," Prentice-Hall, Inc., A Pearson Education Company, Upper Saddle River, NJ...In pursuit of higher education , he entered the graduate program in the Aerospace and Ocean Engineering Department at Virginia Polytechnic Institute

Statistical Content in Middle Grades Mathematics Textbooks

ERIC Educational Resources Information Center

Pickle, Maria Consuelo Capiral

2012-01-01

This study analyzed the treatment and scope of statistical concepts in four, widely-used, contemporary, middle grades mathematics textbook series: "Glencoe Math Connects," "Prentice Hall Mathematics," "Connected Mathematics Project," and "University of Chicago School Mathematics Project." There were three…

An Investigation of Bank-to-Turn Missiles.

DTIC Science & Technology

1986-06-01

Aerodynamic Model and Analysis The aerodynamic transfer functions of the uncoupled yaw channel autopilot are according to Karadimas , C. thesis [Ref. 41: a...Thesis, Naval Postgraduate School, Monterey California, December 1985 3. Ogata, K., Modern Control Engineering, Prentice-Hall Inc., 1970. 4. Karadimas

2005 5th Annual CMMI Technology Conference and User Group. Volume 4: Thursday

DTIC Science & Technology

2005-11-17

Identification and Involvement in the CMMI, Mr. James R. Armstrong , Systems and Software Consortium Ensuring the Right Process is Deployed Right...Customer-Driven Organization Chart Marketing Management: Analysis, Planning, Implementation and Control Philip Kotler © Prentice Hall Being Customer

Geometric Transformations in Middle School Mathematics Textbooks

ERIC Educational Resources Information Center

Zorin, Barbara

2011-01-01

This study analyzed treatment of geometric transformations in presently available middle grades (6, 7, 8) student mathematics textbooks. Fourteen textbooks from four widely used textbook series were evaluated: two mainline publisher series, Pearson (Prentice Hall) and Glencoe (Math Connects); one National Science Foundation (NSF) funded curriculum…

Disorders of Articulation. Prentice-Hall Foundations of Speech Pathology Series.

ERIC Educational Resources Information Center

Carrell, James A.

Designed for students of speech pathology and audiology and for practicing clinicians, the text considers the nature of the articulation process, criteria for diagnosis, and classification and etiology of disorders. Also discussed are phonetic characteristics, including phonemic errors and configurational and contextual defects; and functional…

Self-Ratings of Eight Factors of Quality Management at Naval Avionics Center

DTIC Science & Technology

1991-12-01

revised edition, North Rivers Press, Inc., 1986. Ishikawa , Kaoru , What is Total Quality Control? the Japanese Way, Prentice-Hall, Inc., 1985. Jaeger...including such authors as Deming, Juran, Ishikawa , and Crosby. The questionnaire was validated using a sample from private sector organizations in

Computer Networks and Information Warfare: Implications for Military Operations

DTIC Science & Technology

2000-07-01

specifically referring to this network.” Marshall T. Rose, The Simple Book: An Introduction to Management of TCP/IP based internets (Englewood...Cliffs, New Jersey: Prentice Hall, 1991), p. 2. 22. Marshall T. Rose, The Simple Book: An Introduction to Management of TCP/IP based internets

Study of the Hellenic Military Education Buying Process Using Trend Analysis to Identify Determinant Factors

DTIC Science & Technology

2007-06-01

objectives, and because of their 26 Kotler Philip and Keller Kevin Lane, Marketing Management 12e...pp. 143-156. Kotler , Philip and Keller, Kevin Lane. Marketing Management 12e, Prentice Hall, 2005. NPS Academic Catalog 2007. NPS Registrar Office

A Consumer's Guide to Biology Textbooks 1985.

ERIC Educational Resources Information Center

Moyer, Wayne A.; Mayer, William V.

Presented are critical reviews of 18 biology textbooks submitted for consideration by the Texas State Board of Education during 1984. These reviews are provided in three categories: (1) general biology textbooks: "Biology and Human Progress"--Prentice Hall; "Scott, Foresman Life Science"--Scott, Foresman; "Living Things"--Holt, Rinehart, and…

History Microcomputer Games: Update 2.

ERIC Educational Resources Information Center

Sargent, James E.

1985-01-01

Provides full narrative reviews of B-1 Nuclear Bomber (Avalon, 1982); American History Adventure (Social Science Microcomputer Review Software, 1985); Government Simulations (Prentice-Hall, 1985); and The Great War, FDR and the New Deal, and Hitler's War, all from New Worlds Software, 1985. Lists additional information on five other history and…

Baseline Experiments on Coulomb Damping due to Rotational Slip

DTIC Science & Technology

1992-12-01

by Griffe121 . As expected Equation (2-39) matches the result given by Griffel . 2.2.2. Euler-Bernoulli Beam versus Timeshenko Beam. Omitted from Euler...McGraw-Hill, Inc., 1983. 20. Clark, S. K., Dynamics of Continuous Elements, New Jersey, Prentice-Hall, Inc., 1972. 21. Griffel , W., Beam Formulas

Proceedings of the Acquisition Research Symposium: Imagnination, Innovation, and Implementation, 1991. Volume 1.

DTIC Science & Technology

1991-01-01

Construction Industry Institute, Austin, Texas, April 1990. 6. Ishikawa , Kaoru , What is Total Quality Control? The Japanese Way, Prentice-Hall, N.J., 1985. 7...customer. Ishikawa , a leading Japanese management and line personnel, and where authority on quality management, claims that appropriate, the customer

The Relationship between Performance and Satisfaction: A Utility Analysis.

DTIC Science & Technology

1985-03-01

Journal of Applied Psychology, 52, 343-347. 21 Korman, A.K. (1980) Career success /personal failure. Englewood Cliffs, N.J.: Prentice Hall. Lawler...this extensively in his book Career Success / Personal Failure (1980). Korman quotes from Matters (1976, p. 124): "After you’ve sold widgets for twenty

DIAGNOSIS AND APPRAISAL OF COMMUNICATION DISORDERS. PRENTICE-HALL FOUNDATIONS OF SPEECH PATHOLOGY SERIES.

ERIC Educational Resources Information Center

DARLEY, FREDERIC L.

THIS TEXT GIVES THE STUDENT AN OUTLINE OF THE BASIC PRINCIPLES OF SCIENTIFIC METHODOLOGY WHICH UNDERLIE EVALUATIVE WORK IN SPEECH DISORDERS. RATIONALE AND ASSESSMENT TECHNIQUES ARE GIVEN FOR EXAMINATION OF THE BASIC COMMUNICATION PROCESSES OF SYMBOLIZATION, RESPIRATION, PHONATION, ARTICULATION-RESONANCE, PROSODY, ASSOCIATED SENSORY AND PERCEPTUAL…

On Discrete-Time Pursuit-Evasion Games with Sensing Limitations

DTIC Science & Technology

2008-01-01

observations in the biology literature by Caraco and Wolf [24] that have reported higher group size in foraging lions during the wet season (prey...H. Myers, and S. L. Myers, Probability and Statistics for Engineers and Scientists, 6th ed. New Jersey, USA: Prentice Hall, 1998. [24] T. Caraco and

Quality Improvement: Does the Air Force Systems Command Practice What It Preaches

DTIC Science & Technology

1990-03-01

without his assistance in getting supplies, computers, and plotters. Another special thanks goes to my committee chairman. Dr Stephen Blank. who provided...N.J.: Prentice-Hall. 1986). 166. 5. Ibid.. 181. 6. Sidney Siegel. Nonparametric Statistics for the Behavioral Sciences (New York: Mc- Graw -Hill. 1956

An Empirical Study to Enhance the Reenlistment Process of Civilian Personnel with Prior Military Service.

DTIC Science & Technology

1985-04-01

Analysis. Beverly Hills, CA: Sage Publica- tions, 1980. Kotler , P. Principles of Marketing. Englewood Cliffs, NJ: Prentice- Hall, Inc., 1980...02940 Mr. Philip Bernard B-K Dynamics, Inc. 15825 Shady Grove Road Rockville, MD 20850 Dr. Bruce M. Meglino College of Business Administration

Explicit, Implicit, and Subjective Rating Measures of Situation Awareness in a Monitoring Task

DTIC Science & Technology

1991-10-01

range of the subjects’ weapon (referred to as "envelope sensitivity" and calculated as A’ see Macmillan and Creelman , 1990). In his experiment...1982). Design and analysis: A researchers handbook. Englewood Cliffs, NJ: Prentice-Hall. Macmillan, N. A., and Creelman , C. D. (1990). Response

Molecular Mechanics with an Array Processor.

DTIC Science & Technology

1982-06-01

34 to be submritted. 40 B. W. Kernrihan and D M Ritchie, The CPm guniw.g Language, Prentice- Hall. Eaglewood Cliffs, New Jersey, 1978. 60 D. J. Adams , in...1400 Washington Avenue Ban e o Albany, New York 12203 La J la, California 92093 Dr. Rank Loos Professor C. A. Ansell Latuna Research Laboratory

Estimated Effects of Retirement Revision on Retention of Navy Tactical Pilots.

DTIC Science & Technology

1986-12-01

detailed explanation of the procedure and proofs can be found in Hanushek and Jackson [Ref. 441. S511 ,V. 󈧈 VI. RESULTS AND ANALYSIS A. DESCRIPTIVE...Introduction to Econometrics, pp. 242-243, Prentice-Hall, 1978. 44. Hanushek Eric ard Jackson, John, Statistical .Mlethods for Social Scientists, p. S188

Introduction to Financial Management for Foreign Military Staff Officers

DTIC Science & Technology

1991-06-01

House: New York, 1986. 5. Ishikawa , Kaoru . What is Total Quality Control? The Japanese Way. Prentice-Hall: Englewood Cliffs, NJ., 1985. 6. Juran, J. M...the key to process improvement is the infinite human potential of an organization’s people." 5 [ Ishikawa , 85) 6. Processes, not people, are the root

The Navy’s Quality Journey: Operational Implementation of TQL

DTIC Science & Technology

1993-04-01

training. Dr. Kaoru Ishikawa "Guide to Ouality Control" "QC begins with education and ends with education. To implement TQC, we need to carry out...York: McGraw-Hill, 1986. 20. Ishikawa , Kaoru . What is Total Qualit Control? Englewood Cliffs, NJ: Prentice-Hall, Inc., 1985. 21. Ishikawa , Kaoru

THE HARD OF HEARING. PRENTICE-HALL FOUNDATIONS OF SPEECH PATHOLOGY SERIES.

ERIC Educational Resources Information Center

O'NEILL, JOHN J.

BASIC INFORMATION ABOUT TESTING, DIAGNOSING, AND REHABILITATING THE HARD OF HEARING IS OFFERED IN THIS INTRODUCTORY TEXT. THE PHYSICS OF SOUND, AUDITORY THEORY, ANATOMY AND PATHOLOGY OF THE EAR, AND DIAGNOSTIC ROUTINES ARE DISCUSSED. A CHAPTER ON AURAL REHABILITATION INCLUDES AN OVERVIEW OF LIPREADING AND AUDITORY TRAINING TECHNIQUES FOR ADULTS…

An Analysis of Methods for Maximizing the Utilization of Space in USAF Facilities.

DTIC Science & Technology

1987-09-01

vegetable . peeling machines and dish washing machines- i. Fixed barracks equipment including sinks, troughs and washing machines of all types: .4. Fixed...Prentice-Hall, 1977. 52. Spillars, W.R. and S. Al- Banna . "An Interactive Computer Graphics Space Allocation System," DAW Nine. 229-237. Association for

Assessing Organization Culture Readiness for Knowledge Management Implementation: The Case of Aeronautical Systems Center Directorate of Contracting

DTIC Science & Technology

2003-03-01

effective change management techniques (Gibson, Ivancevich , & Donnelly, 2001). Based on case study 15 research, KM projects require more...Englewood Cliffs, NJ: Prentice Hall. 1986. Gibson, J.L., J.M. Ivancevich , and J.H. Donnelly Jr. Organizations. (10th ed.). Boston: Irwin McGraw-Hill

Successful Insurgent Revolutions in Latin America: Analysis of the Cuban and Nicaraguan Revolutions

DTIC Science & Technology

2014-03-01

Thomas H. Greene, Comparative Revolutionary Movements: Search for Theory and Justice, 3rd ed. (Englewood Cliffs, NJ: Prentice- Hall Contemporary...Revolution, Insurgency, Leadership, Popular Support, External Influence, Military, Insurgent Life Cycle, Theories of Revolution, Cuban Revolution, M-26-7...REVOLUTIONS .............................................. 17   A.   THEORIES OF REVOLUTION

GROUP TREATMENT OF AUTISTIC CHILDREN. PRENTICE-HALL PSYCHOLOGY SERIES.

ERIC Educational Resources Information Center

COFFEY, HUBERT S.; WIENER, LOUISE L.

AT THE EAST BAY ACTIVITY CENTER IN BERKELEY, CALIFORNIA, TREATMENT INVOLVED THE MIXING OF AUTISTIC CHILDREN WITH LESS SEVERELY DISTURBED CHILDREN. NON-AUTISTIC CHILDREN IN THE GROUP WERE EXPECTED TO ACT AS CATALYSTS BY TRYING TO FORM SOME TYPE OF SOCIALLY MATURE RELATIONSHIP WITH THE AUTISTIC CHILDREN WHILE THE THERAPIST ENCOURAGED INTERACTION.…

THE DEAF. PRENTICE-HALL FOUNDATIONS OF SPEECH PATHOLOGY SERIES.

ERIC Educational Resources Information Center

DI CARLO, LOUIS M.

DESIGNED FOR STUDENTS OF SPEECH PATHOLOGY AND AUDIOLOGY AND PRACTICING CLINICIANS, THIS BOOK PRESENTS AN HISTORICAL OVERVIEW OF ATTEMPTS TO TEACH THE DEAF FROM BEFORE THE 15TH CENTURY THROUGH THE 20TH CENTURY. A DISCUSSION OF DIAGNOSTIC PROCEDURES FOR AUDITORY DISORDERS IN CHILDREN INCLUDED INFORMAL TESTING, PLAY AUDIOMETRY, SPEECH TESTS,…

A Study of Adaptive Relevance Feedback - UIUC TREC-2008 Relevance Feedback Experiments

DTIC Science & Technology

2008-11-01

terms. Journal of the American Society for Information Science, 27(3):129–146, 1976. [7] J . J . Rocchio. Relevance feedback in information retrieval. In...In The SMART Retrieval System: Experiments in Automatic Document Processing, pages 313–323. Prentice-Hall Inc., 1971. [8] Gerard Salton and Chris

The Former Yugoslavia and the Quest for Improving Regional Stability

DTIC Science & Technology

1993-04-09

Balkans. New Jersey: Prentice-Hall, Inc. 1965. Nelson, Daniel N. Balkan Imbroglio. Colorado: Westview Press, Inc. 1991. Ra’anon, Uri, Maria Mesner, Keith...Carlisle Barracks, 1992. JOURNALS AND PERIODICALS Altmann , Franz-Lothar. "Ex-Yugoslavia’s neighbors: who wants what?" The World Today. Vol. 48, Nos. 8-9

Predicting Achievement, Distress, and Retention among Lower-Income Latino Youth

ERIC Educational Resources Information Center

Close, Wendy; Solberg, Scott

2008-01-01

This study used structural equation modeling to evaluate whether a combination of social cognitive and self-determination theories [Bandura, A. (1986). "Social foundations of thought and action: A social cognitive theory." Englewood Cliffs, NJ: Prentice-Hall; Deci, E. L., & Ryan, R. M. (1987). The support of autonomy and the control of behavior.…

The Team Boat Exercise: Enhancing Team Communication Midsemester

ERIC Educational Resources Information Center

Cox, Pamela L.; Friedman, Barry A.

2009-01-01

This paper discusses the Team Boat Exercise, which was developed to provide students with a mechanism for addressing team problems and enhancing team communication midsemester. The inspiration for the exercise came from a video by Prentice Hall, Inc. (2001). Part III of the video, entitled "Corporate Coaching," shows senior staff members from the…

Subliminal Advertising: Is it Still Being Taught in Advertising Programs?

ERIC Educational Resources Information Center

Applegate, Edd

In 1974, 1976, and 1980 three best-selling books were published by Prentice Hall authored by Wilson Bryan Key. Key adopted the viewpoint that subliminal perception was a new phenomenon and that advertisers and advertising agencies were involved in manipulation of the public with the cooperation of the mass media. This study asks whether professors…

Do Modes of Thinking Predict Career Interest Types among Chinese University Students?

ERIC Educational Resources Information Center

Zhang, Li-fang; Fan, Weiqiao

2007-01-01

This study had two objectives. The preliminary objective was to further test the psychometric properties of the short-version self-directed search that was intended to be a brief research tool for measuring Holland [Holland, J. L. (1973). "Making vocational choices: A theory of careers." Englewood Cliffs, NJ: Prentice-Hall; Holland, J.…

Department of Defense August 2003 Influencer Poll 1 Overview Report

DTIC Science & Technology

2004-03-01

more positive change in 4 Ajzen , I . & Fishbein , M . (1980). Understanding Attitudes and Predicting...Social Behavior. Englewood Cliffs, NJ: Prentice-Hall. 5 Fishbein , M . & Ajzen , I . (1975). Belief, Attitude, Intention and Behavior: An Introduction to...Mavor, editors. Division of Behavioral and Social Sciences and Education. Washington, DC: The National Academies Press. 12 Fishbein , M ., Ajzen , I

Managing Supply Chain Disruptions

DTIC Science & Technology

2008-08-09

to be negatively associated with innovativeness (Hage & Aiken, 1969; Moch & Morse, 1977; Rogers, 1995; Russell & Hoag, 2004). The range of new...processes, or innovations ( Moch & Morse, 1977). Grover (1993) adds that decreased autonomy of organizational components and the bounded perspective of...Structuring of Organizations: A Synthesis of the Research. Englewood Cliffs, N.J.: Prentice-Hall. Moch , M. K. & Morse, E. V. (1977). Size

Space Power: Military Imperatives in Australia’s Environment

DTIC Science & Technology

1989-03-01

Sheet, p. 3. 28. ibid. p. 6. 29. ibid, p. 6. 30. ibid. p. 6. NOTES CHAPTER IV (Pages 32-63) 1. Philip Kotler . Marketing Management. 1V88, p. 33. 2...Maxwell AFB, Alabama: Air War College, March 1985. Kotler , Philip . Marketing Management. New Jerspy: Prentice Hall, 6th edition, 1986. Latham, Donald C

Bookwatch: A Candid Review of Science Textbooks. Volume I, February-December 1988.

ERIC Educational Resources Information Center

Mayer, William V., Ed.; Bennetta, William J., Ed.

1988-01-01

Each issue in this set of newsletters is devoted exclusively to reviews of a science textbook. Each text is reviewed by two scientists and one science educator. Textbooks reviewed by issue are: (1) "Scott, Foresman Biology" (1988); (2) "Heath Life Science" (1987); (3) "Prentice-Hall Biology" (1987); (4) "Scott, Foresman Life Science" (1987); (5)…

A Prescriptive Model for Resource Allocation at the Intermediate Level Engine Facility.

DTIC Science & Technology

1981-06-01

opinion was to use a linear rela- tionship in the absence of any other method (4). This sug- gestion was based on his extensive knowledge in the area 21 of...Business Publica - tions, Inc., 1980. 16. Shannon, Robert E. Systems Simulation--the Art and Science. Englewood Cliffs NJ: Prentice Hall, Inc., 1975. 17

Analysis of Training Needs for Civil Engineering Superintendents and Foremen.

DTIC Science & Technology

1984-09-01

between superiors and subordinates ( Szilagyi and Wallace , 1983). Most management writing includes a 12...Prentice-Hall Inc., 1979. Student, K. R. "Back to Basics for Improved Human Resource Management," Management Review, 51-56 (August 1978). Szilagyi , Andrew D...and Marc J. Wallace . Organizational Behavior and Performance (Third Edition). Glenview IL: Scott, Foresman, and Company, 1983. Toth, Edward R. Jr

Developing Cultural Competence at the Tactical Level: The Art of the Possible

DTIC Science & Technology

2009-12-11

which together influence the cultural paradigm. Figure 1. The Cultural Web Source: Gerry Johnson and Kevan Scholes, Exploring Corporate Strategy (Saddle... corporate strategy . Saddle River, NJ: Prentice Hall Rodriguez, B. M. 1999. Creating inclusive and multicultural communities: Working through assumptions...Jasper, Melanie and Jumaa Mansour. 2004. Effective healthcare leadership. Blackwell Press. Johnson, Gerry, and Kevan Scholes. 1997. Exploring

Total Quality Management in the United States Army Corps of Engineers

DTIC Science & Technology

1993-05-01

Office. Telephone interview with author, 20 November 1992. Ishikawa , Kaoru (1985). What is Total Quality Control? The Japanese Way. Prentice-Hall, Inc...Organizations ..... 55 Table 13. Ishikawa PDCA Cycle .......................................................... 68 Table 14. TQM Training M atrix...Standards 1008 ( Ishikawa 1985). The Japanese were aware of both the American and British work with standards. The standards were studied by

Cost Reporting at a Navy Branch Clinic

DTIC Science & Technology

1993-03-01

John Wiley & Sons, 1991. 15 Horngren , Charles, Cost Accounting -=A Managerial Emphasis, 5th Edition, Prentice Hall, Inc., Englewood Cliffs, N.J., 1982...traditionally reported under a partial cost reporting system. By applying basic principles of managerial accounting , a full cost reporting system is...traditionally reported under a partial cost reporting system. By applying basic principles of managerial accounting , a proposed full cost reporting

Examining the Structure of Vocational Interests in Turkey in the Context of the Personal Globe Model

ERIC Educational Resources Information Center

Vardarli, Bade; Özyürek, Ragip; Wilkins-Yel, Kerrie G.; Tracey, Terence J. G.

2017-01-01

The structural validity of the Personal Globe Inventory-Short (PGI-S: Tracey in J Vocat Behavi 76:1-15, 2010) was examined in a Turkish sample of high school and university students. The PGI-S measures eight basic interest scales, Holland's ("Making vocational choice," Prentice-Hall, Englewood Cliffs, 1997) six types, Prediger's ("J…

Data Mining in Cyber Operations

DTIC Science & Technology

2014-07-01

information processing units intended to mimic the network of neurons in the human brain for performing pattern recognition  Self- organizing maps (SOM...patterns are mined from in order to influence the learning model . An exploratory attack does not alter the training process , but rather uses other...New Jersey: Prentice Hall. 21) Kohonen, T. (1982). Self- organized formation of topologically correct feature maps. Biological Cybernetics , 43, 59–69

Total Quality Management (TQM) Awareness Seminar. Revision 8

DTIC Science & Technology

1990-04-18

in the United States and abroad, including Dr. W. Edwards Deming, Dr. Joseph Juran, Philip Crosby, Genichi Taguchi, Kaoru Ishikawa , and Armand...Hall, Inc., Englewood Cliffs, NJ 07022. 1985 Ishikawa , Kaoru , Guide to Quality Control, Tokyo; Asian Productivity Organization, 1976 (Available from...Random House Business Division, 201 East 50th Street, New York, NY 10022. � Ishikawa , Karou, What is Total Quality Control?: The Japanese Way, Prentice

An Examination of Energy Considerations in the Product Acquisition Process.

DTIC Science & Technology

1980-12-01

benefits derived (Fisher, 1970; Horngren , 1977). This chapter will examine the many areas where energy costs can be accounted for to provide...overhead cost pool ( Horngren , 1977). The allocation of energy costs involved in the distribution of the documents depends upon the accounting system...Corporation, December 1970. Horngren , Charles T. Cost Accounting - A Managerial Emphasis. Englewood Cliffs NJ: Prentice-Hall, Inc., 1977. 67 / 4 Kinder

Accounting for Veterans’ Educational Assistance Benefits

DTIC Science & Technology

1984-06-01

today’s accounting records. It represents a deferred compensation S earned for present employment. If this cost is omitted from financial statements...that would provide a quantitative basis from which to allocate earned educational benefits as a current employment cost . Pension S accounting ...September 1967, pp. 37-51. 32. Horngren , C.T., Cost Accounting : A Managerial Emphasis, Englewood Cliffs, NJ, Prentice-Hall, inc., 1972. 33. Matz, A

A Cost Model for Air Force Institute of Technology Programs.

DTIC Science & Technology

1979-09-01

Patterson AFB OH, September 1977. ADA 047662. 16. Horngren , Charles T. Cost Accounting , A Managerial Emphasis. Englewood Cliffs NJ: Prentice Hall, Inc...25 S . Categorical Breakdown of AFIT Cost Matrix ....... .................. . 26 6. Elemental Breakdown of AFIT Direct Cost Category...maximum use of existing data sources such as the Air Force Accounting System for Operations. Justification for Research In past years, cost studies

Legacy Systems Upgrade for Software Risk Assessment

DTIC Science & Technology

2001-12-01

Nieto, T. R., Visual Basic 6: How to Program , Prentice Hall, Inc., 1999 Edson, David, Professional Development with Visio 2000: The...and the necessity for the program . Second, follow with a review of the enhancement algorithms and software extensions intended to add additional...taken prior to the programming . First, one must gain thorough understanding of the operation of VitéProject software and its interface with Visio

EMP and HPM Suppression Techniques

DTIC Science & Technology

1997-03-10

34 IEEE International Electromagnetic Compatibility Symposium, Anaheim, California (1993). 6 Jerry Behling. 7 Karen Shrier . 8 Dutcher, Clinton...York (1972). II-A-3-16 II-R REFERENCES SELECTED BIBLIOGRAPHY [I] Hyatt, H. M.; Shrier , K. P., "Electrical Overstress Pulse Protection Material...EI-11(2) (1976). [19] Böhm, David , "Quantum Theory," Prentice-Hall, New Jersey (1951). [20] Dutcher, Clinton, "Vector Space Quantum Formalism

The Triangle: a Multiprocessor Architecture for Fast Curve and Surface Generation.

DTIC Science & Technology

1987-08-01

design , curves and surfaces, graphics hardware. 20...curves, B-splines, computer-aided geometric design ; curves and sur- faces, graphics hardware. (k 12). -/ .... This work was supported in part by the...34 Electronic Design , October 30, 1986. 21. M. A. Penna and R. R. Patterson, Projective Geometry and its Applications to Computer Graphics , Prentice-Hall, Englewood Cliffs, N.J., 1985. 70,e, 41100vr -~ ~ - -- --

Cost Overrun Optimism: Fact or Fiction

DTIC Science & Technology

2016-02-29

Base, OH. Homgren, C. T. (1990). In G. Foster (Ed.), Cost accounting : A managerial emphasis (7th ed.). Englewood Cliffs, NJ: Prentice Hall. Morrison... Accounting Office. Gansler, J. S. (1989). Affording defense. Cambridge, MA: The MIT Press. Heise, S. R. (1991). A review of cost performance index...Image designed by Diane Fleischer Cost Overrun Optimism: FACT or FICTION? Maj David D. Christensen, USAF Program managers are advocates by

Software Project Management

DTIC Science & Technology

1989-07-01

incorporated into the sys- Kotler88 tem. Several interesting concepts are presented, but Kotler , P. Marketing Planning: Analysis, Planning, the bulk of the...Metzger87 Mantei, M. "The Effect of Programming Team Metzger, Philip W. Managing Programming Structures on Programming Tasks." Comm. ACM People: A Personal... Philips . Software Engi- Classic approach in organization theory. neering. Englewood Cliffs, N.J.: Prentice-Hall, 1988. Shannon75 An industrial approach

Narcissism and Toxic Leaders

DTIC Science & Technology

2013-02-01

Action: A Social Cognition Theory (Englewood Cliffs, NH: Prentice Hall, 1986). 9. Bandura , “Moral Disengagement in the Perpetration of Inhumanities... socialization aspect to emotional intelligence.14 In short, emotional intelligence can be taught and learned . Focus on the Self In each of the practical...Psychology 36, (1978): 635-42; Albert Bandura , “Moral Disengagement in the Perpetration of Inhumanities,” Personality and Social Psychology Review, (3)3

Reflex Responses to Ligament Loading: Implications for Knee Joint Stability

DTIC Science & Technology

2001-10-25

white noise approach", Prentice-Hall".:, 1978. [15] B. Grenfield and B. Wyke, "Reflex innervation of the temporo - mandibular joint .". Nature. 211(52...selective, depending on the magnitude of the angular perturbation. Keywords - Reflex, Periarticular tissue afferents, Joint stability I...INTRODUCTION Traditionally, joint stability has been considered to be purely mechanical in origin, with little or no consideration of neuromuscular

Identification of Large Space Structures on Orbit

DTIC Science & Technology

1986-09-01

requires only the eigenvector corresponding to the eigenvector 93 .:. ,S --- k’.’ L derivative being calculated. However, a set of linear algebraic ...Journal of Guidance, Control and Dynamics. 204. Noble, B. and J. W. Daniel, Applied Linear Algebra , Prentice-Hall, Inc., 1977. 205. Nurre, G. S., R. S...4.2.1. Linear Relationships . . . . . . . . . . 114 4.2.2. Nonlinear Relationships . . . . . . . . . 120 4.3. Series Expansion Methods

The Shock and Vibration Bulletin. Part 2. Opening Session, Panel Session, Shock Testing and Analysis, Fluid-structure Topics

DTIC Science & Technology

1976-08-01

would like to 20 g’s rms and this would be instead of the to mention is that the IES under the leadership present single frequency non resonant 2.2 g am...Vol. 11, 1970. 19. Thomson, W. T., Vibration Theory 7. Cremer , L. and Heckl, M. and and Applications, Prentice-Hall, Ungar, E. E., Structure-Borne

Some Thoughts (and Afterthoughts) on Context, Interpretation, and Organization Theory.

DTIC Science & Technology

1982-02-01

viewpoint can be cast as symbolic interactionism (Blumer, 1969) but it is a viewpoint with many variations (Rock, 1979). 1 seek my own intellectual models in... Symbolic interactionism : Perspective and method. Englewood Cliffs, New Jersey: Prentice-Hall, 1969. Burrell, G. and Morgan, G. Sociological paradigms and...making of symbolic interactionism . London: Macmillan, 1979. Salancik, G.R. and Pfeffer, J. An examination of need satisfaction models of job attitudes

An Annotated Reading List for Concurrent Engineering

DTIC Science & Technology

1989-07-01

The seven tools are sometimes referred to as the seven old tools.) -9- Ishikawa , Kaoru , What is Total Quality Control? The Japanese Way, Prentice-Hall...some solutions. * Ishikawa (1982) presents a practical guide (with easy to use tools) for implementing qual- ity control at the working level...study of, :-, ieering for the last two years. Is..ikawa, Kaoru , Guide to Quality Control, Kraus International Publications, White Plains, NY, 1982. The

TQM - Total Quality Management (Bibliography)

DTIC Science & Technology

1990-05-01

ISBN: 0-941893-00-6 Price: $27.00 NAVSWC Library Call No: TS156 S358 GUIDE TO OUALITY CONTROL Author: Ishikawa , Kaoru Publisher: Asian Productivity...teachings of Juran, Deming, Feigenbaum, Crosby, Taguchi, Shewhart, Ishikawa , and others. 19 OUT OF BEDLAM: MANAGEMENT BY QUALITY LEADERSHIP Author...Price: $60.00 WHAT IS TOTAL QUALITY CONTROL? THE JAPANESE WAY Author. Ishikawa , K oru Publisher: Prentice Hall Date: 1985 Pagination: 215pp ISBN: 0-13

Life-Cycle Costs of Alternative ICBM Second Stage Designs

DTIC Science & Technology

1992-09-01

of Logistics, Air Force Institute of Technology (AU), Wright-Patterson AFB OH, 1992. 34. Horngren , Charles T. and George Foster. Cost Accounting ; A...Managerial Emphasis (Sixth Edition). Englewood Cliffs NJ: Prentice-Hall, Inc., 1987. 35. Horngren , Charles T. and George Foster. Cost Accounting ; A...our research. We would also like to thank those involved with the 1991 Small ICBM Operations and Support cost estimate. Your assistance with the O& S

Cost Per Flying Hour Analysis of the C-141

DTIC Science & Technology

1997-09-01

Government Printing Office, 1996. Horngren , Charles T. Cost Accounting : A Managerial Emphasis (Eighth Edition). New Jersey: Prentice Hall, 1994. Hough...standard accounting techniques. This analysis of AMC’s current costs and their applicability to the price charged to the customer shall be the focus of... Horngren et al.,1994:864). There are three generally recognized methods of determining a transfer price (Arnstein and Gilabert, 1980:189). Cost based

An Interactive Decision Support System for Scheduling Fighter Pilot Training

DTIC Science & Technology

2002-03-26

Deitel , H.M. and Deitel , P.J. C: How to Program , 2nd ed., Prentice Hall, 1994. 8. Deitel , H.M. and Deitel , P.J. How to Program Java...Visual Basic Programming language, the Excel tool is modified in several ways. Scheduling Dispatch rules are implemented to automatically generate... programming language, the Excel tool was modified in several ways. Scheduling dispatch rules are implemented to automatically generate

Evaluating Breast Self-Examinations in a Military Beneficiary Population

DTIC Science & Technology

1999-05-01

behaviors (p. 8), by I . Ajzen and M . Fishbein , 1980, Englewood Cliffs, NJ: Prentice-Hall. Belief of consequence Beliefs of others Motivation to comply...D. (1987). Performance of breast self-examination by women at high risk for breast cancer. Women & Health, 12(2), 29- 46. Ajzen , I . & Fishbein , M ...BSE performance. Key Words: Ajzen - Fishbein Theory of Reasoned Action; breast neoplasms; breast self- examination; cancer screening; military medicine

Software Acquisition Risk Management Key Process Area (KPA) - A Guidebook Version 1.0.

DTIC Science & Technology

1997-08-01

Budget - Software Project Management Practices and Techniques. McGraw-Hill International (UK) Limited, 1992. [Boehm 81 ] Boehm, Barry . Software...Engineering Economics. Englewood Cliffs, N.J.: Prentice-Hall, Inc., 1981. [Boehm 89] Boehm, Barry . IEEE Tutorial on Software Risk Management. New York: IEEE...95] [Mayrhauser 90] [Moran 90] [Myers 96] [NRC 89] [Osborn 53] [Paulk 95] [ Pressman 92] [Pulford 96] [Scholtes 88] [Sisti 94] [STSC 96

Reliability of a Measure of Institutional Discrimination against Minorities

DTIC Science & Technology

1979-12-01

samples are presented. The first is based upon classical statistical theory and the second derives from a series of computer-generated Monte Carlo...Institutional racism and sexism . Englewood Cliffs, N. J.: Prentice-Hall, Inc., 1978. Hays, W. L. and Winkler, R. L. Statistics : probability, inference... statistical measure of the e of institutional discrimination are discussed. Two methods of dealing with the problem of reliability of the measure in small

Preparing Women for Strategic Leadership Roles in the Army

DTIC Science & Technology

2003-03-01

organization. Male dominated professions tend to look for experience and interaction that they can measure such as field exercises and sporting events...Diverse Work Force”, The Leader of the Future, Josey-Bass Publishers, San Francisco, CA, 1996, p.78. 23 Brian Mitchell, “Weak Link: The Feminization of... Feminization of the American Military, Washington, D.C.: Regency Gateway, 1989. Robbins, Stephen P., Organizational Behavior, New York, NY: Prentice Hall

A Study of Civilian Registered Nurse Recruitment at Madigan Army Medical Center, Tacoma, Washington.

DTIC Science & Technology

1982-06-01

Marketing Management. Boston: Allyn and Bacon, Inc., 1980. Kotler , Philip . Marketing for Nonprofit Institutions. Englewood Cliffs, N.D.: Prentice-Hall...Interview with Ms. R. Marsh, Staffing Specialist, Force Develop- ment Division, Madigan Army Medical Center, Tacoma, WA (Dec 81) 20Philip Kotler ...Health Care Marketing: Issues and Trends, ed.: Philip D. Cooper (Germantown, MD.: Aspen Systems Corporation, 1979), p. 7. 22 Initial Report, National

The Matrix Pencil and its Applications to Speech Processing

DTIC Science & Technology

2007-03-01

Elementary Linear Algebra ” 8th edition, pp. 278, 2000 John Wiley & Sons, Inc., New York [37] Wai C. Chu, “Speech Coding Algorithms”, New Jeresy: John...Ben; Daniel, James W.; “Applied Linear Algebra ”, pp. 342-345, 1988 Prentice Hall, Englewood Cliffs, NJ [35] Haykin, Simon “Applied Linear Adaptive...ABSTRACT Matrix Pencils facilitate the study of differential equations resulting from oscillating systems. Certain problems in linear ordinary

A Computer Simulation of Braitenberg Vehicles

DTIC Science & Technology

1991-03-01

first believed. In 1969 Marvin Minsky published his now famous (infamous?) proof of the inability of single layer networks to solve many simple problems...and Behavior. Englewood, NJ: Prentice-Hall, 1986. Minsky , Marvin and S. Papert. Perceptrons. Cambridge, MA, MIT Press, 1969. Porter, Kent and Mike...such as that of the exclusive-or gate ( Minsky and Papert, 1969). Many researchers gave up work in the artificial neuron field based on the impact of

Unit Testing and Analysis

DTIC Science & Technology

1989-04-01

Suzanne Woolf performed the library searches, and Dana Textbooks 14 Hausman spent many hours typing abstracts and annota- tions. Suggested Schedules 14...SE-1, 2 (June 1975), 156-173. Reprinted in [Miller8l a]. Gerhart76 Abstract: This paper examines the theoretical ard Gerhart, Susan L., and Lawrence ...of the Summer School on Corn- Englewood Cliffs, N. J.: Prentice-Hall, 1981. puter Program Testing Held at SOGESTA, Urbino, This book delves deeply

Cultural Organization: Fragments of a Theory,

DTIC Science & Technology

1983-11-01

34 In B. Staw & L.L. Cummings (eds.) Research in Organization Behavior , Vol. 6, Greenwich, CT: JAI Press, 1963. November, 1982. 0070-11H 0983 TR-11 Bailyn... Behavior . November, 1982. TR-12 Schein, Edgar H. "The Role of the Founder In the Creation of Organizational Culture." Organizational Dynamics, Summer...34 Forthcoming in J. Lorscb (ed.) Handbook of Organizational Behavior , Englewood Cliffs, NJ: Prentice-Hall. May, 1983. TR-20 Van Maanen, John

An Analysis of Unit Costs at a Consolidated Supply Depot

DTIC Science & Technology

1990-12-01

Not-For-Profit Setting,"The Accounting Review,July 1990. Horngren , C. T., Cost Accountinq:A Managerial Emphasis,3rd ed, Prentice-Hall Inc.,1972...sector has used concepts of unit costs for 4 decades. Any managerial or cost accounting text discusses in some length unit costs . For Defense contractors...the Cost Accounting Standards Board (CASB) provides guidance for contract costs . Unit costs include direct, indirect, and general and administrative

An Analysis of Information Structure and Optimal Transfer Pricing decision Rules for Decentralized Firms

DTIC Science & Technology

1980-12-01

Inventories and Work Force, Prentice-Hall, Englewood Cliffs, New Jersey (1960). Horngren , C. T. Cost Accounting : A Managerial Emphasis, Fourth Edition...achieved/received by virtue of AFIT performing the research. Can you estimate what this research would have cost if it had been accomplished under...future potential, or other value of this research. Please use the bottom part of this questionnaire for your statement( s ). NAME GRADE POSITION

Depreciation Requirements in the Department of Defense

DTIC Science & Technology

1982-06-01

Horngren , C. J., Cost Accounting : A Managerial Emphasis, Prentice-Hall, •IP7. 34. Anthony, R. N. and Herzlinger, R. E., Management Control in Nonprofit...consisted of both accrual and cost accounting , as well as property accounting i [Ref. 1: p. 171] The Commission also made the recommenda- i tion, with respect...Amortization of Cost Current accounting for depreciation is based upon the cost amortization concept. As defined in the Report of the Committee on

Combat Comptrollers: Considerations across the Planning Continuum

DTIC Science & Technology

2006-06-01

gain Process DD 1081 to transf er accountability to PA ALO prepares v oucher f or bank f ees Cost : $50 per month Rework: 30% Time: 40 manhours per...Operations Costs . (2002, May). United States General Accounting Office Report (GAO-02-450). 10 Telephone interview with Maj Tony Hernandez. Commander...Washington, DC. p. A-5. 97 Horngren , C. T., Selto, F. H., Sundem, G. L. (1993). Introduction to Management Accounting . 9th Ed. Prentice Hall

Supporting Secure, AD HOC Joins for Tactical Networks

DTIC Science & Technology

2002-05-07

ftp.isi.edu/in-notes/ rfc2501.txt (20SEP01). [4] Deitel , Harvery M. and Paul J. Deitel . Java: How to Program 3rd Edition. (Prentice Hall: New...produce a complete product, to include the construction of TTNT hardware. The TTNT program is concerned with frequency hopping schemes, error correcting...Configuration To create the digital certificates needed for the client authentication, we modified a hybrid file encryption program that used a Rivest-Shamir

A Comparison of Computational Cognitive Models: Agent-Based Systems Versus Rule-Based Architectures

DTIC Science & Technology

2003-03-01

Java™ How To Program , Prentice Hall, 1999. Friedman-Hill, E., Jess, The Expert System Shell for the Java Platform, Sandia National Laboratories, 2001...transition from the descriptive NDM theory to a computational model raises several questions: Who is an experienced decision maker? How do you model the...progression from being a novice to an experienced decision maker? How does the model account for previous experiences? Are there situations where

Toward Managing & Automating CyberCIEGE Scenario Definition File Creation

DTIC Science & Technology

2004-03-01

Deitel , H & Deitel , P. (2002). Java: How to Program fourth Ed. New Jersey: Prentice Hall. [Fisher 2003] Fisher, C., Chiricosta, T. & Witherspoon, T...experience with the Java programming language. Precious time was required to learn how to implement some of the more complicated interface components...demonstrating the risks of the Internet and open networks [Irvine1 2003]. Policy is subtle, and there is no easy way to demonstrate how one small change

Rapid Prototyping of High Performance Signal Processing Applications

DTIC Science & Technology

2011-01-01

understand- ing broadband wireless networking . Prentice Hall, 2007. [4] J.W.M. Baars, L.R. D’Addario, and A.R. Thompson. Radio astronomy in the... wireless sensor net- works. In Proceedings of the IEEE Real-Time Systems Symposium, pages 214–223, Tucson, Arizona, December 2007. 147 [74] C. Shen, H. Wu...computing platforms. In this region of high performance DSP, rapid prototyping is critical for faster time-to-market (e.g., in the wireless

Topological Patterns for Scalable Representation and Analysis of Dataflow Graphs

DTIC Science & Technology

2011-11-01

dimensional mesh structure. Such a structure is of particular use to model DSP architectures in which data flows across a network of processing elements...ACSSC.1998.751616 3. Andrews, J.G., Ghosh, A., Muhamed, R.: Fundamentals of WiMAX: understanding broad- band wireless networking . Prentice Hall (2007... SECURITY CLASSIFICATION OF: 17. LIMITATION OF ABSTRACT Same as Report (SAR) 18. NUMBER OF PAGES 23 19a. NAME OF RESPONSIBLE PERSON a. REPORT

Time-Frequency Signal Representations Using Interpolations in Joint-Variable Domains

DTIC Science & Technology

2016-06-14

distribution kernels,” IEEE Trans. Signal Process., vol. 42, no. 5, pp. 1156–1165, May 1994. [25] G. S. Cunningham and W. J. Williams , “Kernel...interpolated data. For comparison, we include sparse reconstruction and WVD and Choi– Williams distribution (CWD) [23], which are directly applied to...Prentice-Hall, 1995. [23] H. I. Choi and W. J. Williams , “Improved time-frequency representa- tion of multicomponent signals using exponential kernels

Microsoft Research at TREC 2009. Web and Relevance Feedback Tracks

DTIC Science & Technology

2009-11-01

Information Processing Systems, pages 193–200, 2006. [2] J . M. Kleinberg. Authoritative sources in a hyperlinked environment. In Proc. of the 9th...Walker, S. Jones, M. Hancock-Beaulieu, and M. Gatford. Okapi at TREC-3. In Proc. of the 3rd Text REtrieval Conference, 1994. [8] J . J . Rocchio. Relevance...feedback in information retrieval. In Gerard Salton , editor, The SMART Retrieval System - Experiments in Automatic Document Processing. Prentice Hall

Investigation of the Atmospheric Propagation of Alkali Lasers in a Maritime Environment Using Tunable Diode Laser Atmospheric Spectroscopy

DTIC Science & Technology

2013-03-01

which is given as (6) where is the FWHM of a Doppler broadened lineshape, given as...magnitude higher than the Doppler broadened width, the pressure broadened FWHM is not sufficiently large to entirely dominate the overall FWHM. Because...Electronics. Prentice Hall, USA, 1995. 8. L. S. Rothman, C. P. Rinsland, A. Goldman , S. T. Massie, D. P. Edwards, J.-M. Flaud, A. Perrin, C. Camy

Designing an Instrument to Identify Instructor Characteristics and Student Reactions in U.S. Marine Corps Vocational Training

DTIC Science & Technology

2010-01-01

during the midst of the Cold War, the Democratic Leadership Council (1988) reaffirmed the necessity of national service by suggesting that ―No... Democratic Leadership Council (1988) when they warned that the military had become for ―many low-income Americans, and particularly minorities, an...Education, 30(4), 351-376. Davis, J. A. (1971). Elementary survey analysis. Englewood Cliffs, NJ: Prentice-Hall, Inc. Democratic Leadership Council

The Use of Market Analysis in Determining Resource Allocations for the Exceptional Family Member Program in USAREUR Landstuhl Army Regional Medical Center, Landsthul, Germany

DTIC Science & Technology

1984-08-01

tests, interviews, and behavioral evaluations. (5) Planning and managing a program of psychological services, including psychological counseling for...Establish capability to provide health related services at realistic levels at OCONUS locations consistent with prevalence rates of manageable ...Health Care Delivery in the United States, New Yori: Springer Publishing Ccmpany, 1981. Kotler , Philip. varketing NLaagement, Ne Jersey: Prentice-Hall

The Challenges of Internetworking Unattended Autonomous Sensors

DTIC Science & Technology

2006-12-01

number of nodes that can hear the broadcast by a squared factor. The establishment of path keys for multi-hop range extension should however be used...Conf. on Info. Sci. and Syst. (CISS 󈧅), Baltimore, 21-23 March 2001 [9] R . Ramanathan, “On the Performance of Ad Hoc Networks with Beamforming...Computing”, Prentice Hall PTR, 2002 [12] S. Slijepcevic, M. Potkonjak, V. Tsiatsis, S. Zimbeck, M.B. Srivastava “On Communication Security inWireless Ad

A Study on How to Implement an Effective Marketing and Education Program for Coordinated Care

DTIC Science & Technology

1992-11-01

could play. Philip Kotler and Roberta N. Clarke (1987) recognize that the role marketing plays in health care organizations varies greatly. It is...accepted by professional marketers is provided by Kotler and Clarke (1987): Marketing is the analysis, planning, implementation, and control of carefully...Gaithersburg, MD: Aspen. Kotler , P. & Clarke, R. N. (1987). Marketina for health care organizations. Englewood Cliffs, NJ: Prentice-Hall. Leebov, W. (1988

A Project to Develop a Marketing Plan in Support of William Beaumont Army Medical Center, Fort Bliss, Texas

DTIC Science & Technology

1989-12-01

need for a consumer- oriented outlook ( Kotler 1987). Each of these authors are discussing the need for health care organizations to pursue effective...to the customer. Between these definitional extremes is the point of 17 view presented by Kotler and Clarke (1987). Their joint exhaustive definition...Types of Health Care Organizations, Adapted from Kotler Strategic Marketing for Nonprofit Orqanizations (Englewood Cliffs: Prentice- Hall, 1987). GENERAL

Calculating Required Substructure Damping to Meet Prescribed System Damping Levels

DTIC Science & Technology

2007-06-01

Rorres, Elementary Linear Algebra . New Jersey: John Wiley & Sons, 2005. 2. Klaus-Jurgen Bathe, Finite Element Procedures. New Jersey: Prentice Hall...will be covered in the explanation of orthogonal complement. The definitions are extracted from the book “ Linear Algebra and its Applications” by...TA = left nullspace of A; dimension m-r Applying the first part of the fundamental theorem of Linear Algebra we can now talk about the orthogonal

Improving the Cybersecurity of U.S. Air Force Military Systems Throughout Their Life Cycles

DTIC Science & Technology

2015-01-01

James D. Powers, Elizabeth Bodine-Baron, Bernard Fox, Lauren Kendrick, Michael H. Powell Report Documentation Page Form ApprovedOMB No. 0704...Rational, Natural, and Open Systems, 3rd ed., Englewood Cliffs, N.J.: Prentice Hall, 1992. 61 Snyder, Don, Bernard Fox, Kristin F. Lynch, Raymond E...Conley, John A. Ausink, Laura Werber , William Shelton, Sarah A. Nowak, Michael R. Thirtle, and Albert A. Robbert, Assessment of the Air Force

A Model for the Evaluation of Offsets in International Arms Transfers.

DTIC Science & Technology

1982-01-01

8tefan a. Robock and Kenneth Sizmonds, International Business and Multinational Entergrises (Wamewood, Illinois: Richard D. Irwin, Inc., 1973)., pp. 70-73...individual voter is socialized into his political attitudes, not, as Sir Ivor Jennings suggested, on casting his first vote, nor at the moment of birth...N.J.: Prentice-Hall, 1974. Branson , William H. Macroeconomic Theory and Policy. New York: Harper and Row Publishers, 1972. Carlton, David and Carlo

An Integrity Framework for Image-Based Navigation Systems

DTIC Science & Technology

2010-06-01

Anton H. and Rorres C. Elementary Linear Algebra . New York, NY: John Wiley & Sons, Inc., 2000. 4. Arthur T. “The Disparity of Parity, Determining...107. Spilker , James J.J. Digital Communications by Satellite. Englewood Cliffs NJ: Prentice Hall, 1977. 108. Strang G. Linear Algebra and its...2.3 The Linearized and Extended Kalman Filters . . . . . . 22 2.3.1 State and Measurement Model Equations . . . 23 2.3.2 The Linearized Kalman Filter

Acquisition Review Quarterly. Vol. 2, No. 1, Winter 1995

DTIC Science & Technology

1995-01-01

and Co. Kotler , P. (1988). Marketing Management: Analysis and Planning (6th ed.), (pp. 280-284). Englewood Cliffs, NJ: Prentice-Hall, Inc. 40- Winter...University of Massachusetts. Dr. Durant is a professor and Chair of the Faculty of Marketing in the College of Business and Mangement at the University...studies related to consumer behav- ior in marketing . In addition to being easy to apply, it is quite useful in diagnosing why one product is viewed more

Improved Modeling of Structural Joint Damping

DTIC Science & Technology

1986-12-01

fourth order beam equation. Griffel has tabulated the results for a number of beam loading geometries and, as seen in Figure 2-11, has plotted the shear... Griffel . Having the solution to the built-in beam symmetric case we can now move on to the development of the Boundary Element theory. 2.3 indirect...December 1985. 9. Greenwood, D. T., Principle? &t PY"affllC3/ New Jersey, Prentice-Hall, Inc., 1965. 10. Griffel , William, Beam Formulas. New York

Total Quality Management Implementation: Selected Readings

DTIC Science & Technology

1989-04-01

October 1986; Kaoru Ishikawa , Watj is Total Quality Control? The Japanese Way (Englewood Cliffs, NJ.r Prentice Hall, Inc. 1985), pp. 59-71 and chapter 7...and teachings of Dr. Kaoru Ishikawa and Prcfess:- Yoshikazu Tsuda. In their presentations I find ideas which conflict with current belie’s in t- s cou...responsible for S. Kaoru Ishikawa . 147iat is Total Quahn Control’ Th, Japar,,I the safety of all passengers and their belongings. w. (Englewood Hills. NJ

Total Quality Management: A Selected Bibliography

DTIC Science & Technology

1993-03-01

Business One Irwin, 1992. 3 0 8 pp. Pp. 47-88: "Different Drummers." (HD62.15 H86 1992) Ishikawa , Kaoru . INTRODUCTION TO QUALITY CONTROL. Tokyo: 3A...Corporation, 1990. 435pp. (TS156 183 1990) Ishikawa , Kaoru . WHAT IS TOTAL QUALITY CONTROL? THE JAPANESE WAY. Englewocd Cliffs, NJ: Prentice-Hall, 1985...Using Measurement Data." (TS156 M34 1987) Ishikawa , Kaoru . INTRODUCTION TO QUALITY CONTROL. Tokyo: 3A Corporation, 1990. 435pp. (TS156 183 1990) Juran

The Subject Matter of Process Improvement: A Topic and Reference Source for Software Engineering Educators and Trainers.

DTIC Science & Technology

1995-05-01

Random House Business Division, 1986. Ishikawa , Kaoru . What is Total Quality Control?: The Japanese Way. En- glewood Cliffs, NJ: Prentice-Hall...by drawing attention to the vital few truly important problems. Cause-and-effect diagrams. Also called fishbone and Ishikawa diagrams due to their...February 1994. 5.2 The Seeds [Aguayo 91] [Crosby 79] [Crosby 92] [Deming 86] [Fellers 92] [Gitlow 87] [Gluckman 93] [Imai 86] [ Ishikawa 85] [Juran

A Cost Simulation Tool for Estimating the Cost of Operating Government Owned and Operated Ships

DTIC Science & Technology

1994-09-01

Horngren , C.T., Foster, G., Datar, S.M., Cost Accounting : A Management Emphasis, Prentice-Hall, Englewood Cliffs, NJ, 1994 IBM Corporation, A Graphical...4. TITLE AND SUBTITLE A COST SIMULATION TOOL FOR 5. FUNDING NUMBERS ESTIMATING THE COST OF OPERATING GOVERNMENT OWNED AND OPERATED SHIPS 6. AUTHOR( S ...normally does not present a problem to the accounting department. The final category, the cost of operating the government owned and operated ships is

Depreciation Accounting in the Uniform Chart of Accounts.

DTIC Science & Technology

1982-12-01

footage of building occupied. Reason( s ) for Compute full cost of Rate setting, cash accounting for patient care flow generation and fund- depreciation ing... Horngren , Charles T., Cost Accounting ; A Managerial Emphasis, Prentice-Hall Inc., 1972. 32. Sawyer, Lawrence B., The Practice of Modern Internal Auditing...Awd ubtlft) S . TYPE or RE PORT a PE*IoO CovIERWO Master’s Thesis; Depreciation Accounting in the Uniform Dembr18 Chart of Accounts .PSOiwON.EORlumm

Network Application Server Using Extensible Mark-Up Language (XML) to Support Distributed Databases and 3D Environments

DTIC Science & Technology

2001-12-01

diides.ncr.disa.mil/xmlreg/user/index.cfm] [ Deitel ] Deitel , H., Deitel , P., Java How to Program 3rd Edition, Prentice Hall, 1999. [DL99...presentation, and data) of information and the programming functionality. The Web framework addressed ability to provide a framework for the distribution...BLANK v ABSTRACT Advances in computer communication technology and an increased awareness of how enhanced information access can lead to improved

An Experimental Characterization of Damping Properties of Thermal Barrier Coatings at Elevated Temperatures

DTIC Science & Technology

2011-03-01

zirconium. For the standard, Brayton open-cycle, gas turbine, typical of modern aircraft power plants, the thermodynamic efficiency is heavily driven by...linearize the radiation emission term around Ti,j0 from a previous the previous step, Taylor expand, and rearrange Eq. (23) in terms of Ti,j to apply as...York: Wiley. 2004. Nilsson, J. W., and Riedel, S. A. Electric Circuits. Prentice Hall. 2007. 512 Noda, N. Thermal Stresses. Taylor & Francis. 2002

Organizational Learning in the Development of Doctrine in the U.S. Army, 1976-1986: A Historically-Based Study

DTIC Science & Technology

1994-04-01

Kotler , P. & Armstrong , G. (1991). Principles of Marketing. Englewood Cliffs, NJ: Prentice-Hall. Kotler , P., Fahey, L. & Jatusripitak, S. (1985). The...total quality management (Garvin, 1991), or the goal of customer orientation (Peters, 1984), or a better marketing focus ( Kotler , 1985), and other...another to produce a product that benefits society. Kotler 117 (1991) defines this a societal marketing. The implication for the military and national

Reorganizing Geographic Combatant Command Headquarters for Joint Force 2020

DTIC Science & Technology

2013-05-01

Corps General James N. Mattis , U.S. Central Command Commander, before the House Armed Services Committee on March 7, 2012, about the posture of U.S...Prentice Hall, 2002. Legal Organization of Defense. http://www.ndu.edu/library/pbrc/36L52.pdf (accessed January 21, 2013). 99 Mattis , James N...Statement of U.S. Marine Corps General James N. Mattis , U.S. Central Command Commander, before the House Armed Services Committee on March 7, 2012

Feed Forward Programming of Car Drivers’ Eye Movement Behavior. A System Theoretical Approach. Volume 1

DTIC Science & Technology

1980-02-01

Standardization February 1980 13. NUMBER OF PAGES Group ( UK ), Box 65, FPO New York 09510 216 14. MONITORING AGENCY NAME A ADDRESS(I differmt bar...with lateral information input, s they- xate on the road’s lines frequently. Beginners, as driving tiea - chers report, have great difficulties in...perceptual system. Boston, Houghton Mifflin Co., 1966. GIBSON, J.J.: Principles of perceptual learning and develop- ment. New Jersey , Prentice Hall Inc

Cognitive Models for Learning to Control Dynamic Systems

DTIC Science & Technology

2008-09-26

1992 [47] G. F. Franklin and J. D. Powell, Feedback Control of Dynamic Systems, New Jersey: Pearson Prentice Hall 2006 [48] M . Fishbein and I . Ajzen ...the course of decision making, the valence of an action Vi ( i = A or M ) is defined as the subjective expected payoff for each action also fluctuates...research: The role of formal models, IEEE Transactions on Systems, Man, and Cybernetics 16, 1986, pp. 439–449. [54] M . I . Jordan, Constrained

Formal Models versus Human Situational Understanding: Inherent Limitations on the Modeling of Business Expertise

DTIC Science & Technology

1981-02-01

New York, 1979. 1221 Kotler , P., MARKETING MANAGEMENT, Fourth Edition, Prentice- Hall, Inc., Englewood, N. J., p. 322, 1980. 123] Dreyfus, S. and H...reader experience and skill, we shall try our hand at illustration by means of a business skill, market - ing management. Not being personally experienced...in this area, we can only speculate. The amount of verisimilitude that experienced marketing decision-makers find in our descrintior will be a test of

Development and Application of a Methodology for Evaluating Type II expired Shelf Life Hazardous Material Generation in the United States Air Force

DTIC Science & Technology

1992-09-01

Air Force Institute of Technology. EPA Perspective, Handout for ENV 022 - Pollution Prevention, 1992. 2. Chiras , Daniel D. Environmental Science : Action...Technology Air University In Partial Fulfillment of the Requirements for the Degree of Master of Science in Engineering and Environmental Management...4 August 1993. 19. Masters, Gilbert M. Introduction to Environmental Engineering and Science . Englewood Cliffs, NJ: Prentice Hall, 1991 20. Messenger

Literature Review: Materials with Negative Poisson’s Ratios and Potential Applications to Aerospace and Defence

DTIC Science & Technology

2006-08-01

and defence industries. In fact, some materials with such anomalous (i.e. NPR) properties have been used in applications such as pyrolytic graphite...real applications such as pyrolytic graphite with NPR of -0.21 for thermal protection in aerospace (Garber, 1963), large single crystals of Ni3Al with...Foundations of Solid Mechanics, Prentice-Hall, p.353, 1968. Garber, A.M., Pyrolytic materials for thermal protection systems, Aerospace Eng., Vol

An Analysis of and a Prescription for the Capital Improvement Programming Process for Small Cities.

DTIC Science & Technology

1980-12-01

thorough analysis and discussion in texts re- lating to business finance, managerial finance, and management accounting . The most notable (that is, the...Theory of the Firm, Prentice-Hall, 1963. DeMoville, W., "Capital Budgeting in Municipalities," Management Accounting , v. 59, no. 1, p. 17-20, 28, July...involves the use of the present value technique. This technique is adequately explained in the literature of basic business finance and management

The Archaeology and History of Lake Ray Roberts. Volume 1. Cultural Resources Survey.

DTIC Science & Technology

1982-03-01

the survey have rendered the information they contain through the recording process and should be determined ineligible for further study. Fifty-five...clay features were actually human hearths ( Heizer and Brooks 1965), and the possibility that the Clovis point was planted ( Heizer 1974). Recent research...15:157-172. Hart, John Fraser 1976 The look of the land. Prentice-Hall, Englewood Cliffs, New Jersey. * 9-5 Heizer , R.F. 1974 Some thoughts on hoaxes

Army Library Institute V: Product/Marketing/Service - Volume I, Report of Proceedings

DTIC Science & Technology

1981-11-01

Strategy for Survival" College and Research Libraries (July) pg. 328-332. Kotler , Philip (1975) Marketing for Nonprofit Organizations (Englewood...refer you to Philip Kotler’s, "Marketing for Non-Profit Organizations" (Prentice-Hall, 1975). The essential Idea of marketing concerns the process by...927-5017 Casey, Philip M. U.S. Army ARRCOM ATTN: DRSAR-LEP-L Rock Island, XL 61299 AV: 793-4208 Cass, Ed C. Chief Archivist, USMA West

Protocol Interoperability Between DDN and ISO (Defense Data Network and International Organization for Standardization) Protocols

DTIC Science & Technology

1988-08-01

Interconnection (OSI) in years. It is felt even more urgent in the past few years, with the rapid evolution of communication technologies and the...services and protocols above the transport layer are usually implemented as user- callable utilities on the host computers, it is desirable to offer them...Networks, Prentice-hall, New Jersey, 1987 [ BOND 87] Bond , John, "Parallel-Processing Concepts Finally Come together in Real Systems", Computer Design

Issues in reflection and debriefing: how nurse educators structure experiential activities.

PubMed

Brackenreg, Jenni

2004-12-01

Experiential learning is particularly useful in vocational education programs where theory needs to be linked to practice. Although experiential learning is often advocated in nursing education and the importance of debriefing and reflection is almost always espoused, the focus in the literature has tended to be on detailed descriptions of the action phase with little close analysis of how the reflective phase is facilitated. The Lewinian model described by Kolb [Experiential Learning. Experience as Source of Learning and Development, Prentice-Hall, New Jersey, 1984] and the structuring approach suggested by Thiagarajan [Experiential Learning Packages, Prentice-Hall, Englewood Cliffs, NJ, 1980] have been used as the theoretical context for an exploration of how nurse teachers describe their facilitation of the debriefing and reflective phases of experiential learning activities. Explication of the entire planned experiential learning experience is important for increasing the chances of the student being able to close the experiential learning loop. The more covert reflective phases for facilitating experiential learning are crucial and if neglected, or inexpertly and insensitively handled, may at best lead to poor learning outcomes or at worst lead to emotional damage and ;unfinished business' for the student. Interviews with eight experienced university educators elicited descriptions of how they constructed experiential activities with special reference to their descriptions of how the debriefing or reflective phases were structured.

A Survey of the Command Information Function in U.S. Army Maneuver Battalions during the Gulf War.

DTIC Science & Technology

1993-11-10

Sudman, Seymore and Norman M. Bradburn. Asking Questions. San Francisco: Jossey-Bass, 1982. Szilagyi , Andrew and Marc Wallace . Organizational Behavior and Performance. USA: Harper Collins, 1990. 110 ...3 to a level of no dissatisfaction that will allow subsequent motivators to be effective I .7 I I I (Szilagi and Wallace 102). I Command information...Prentice-Hall, 1964. Doyle, Joseph B. Frederick Wilhelm von Steuben and the American Revolution. New York: B. Franklin, 1970. Eberhard, Wallace B

30TH Annual Conference of the Military Testing Association Held in Arlington, Virginia on 27 November-2 December 1988

DTIC Science & Technology

1988-12-02

S95-S120. Goldman, Alvin I. 197G. A Theorv of Human Action. Englewood Cliffs, NJ: Prentice Hall. Jones, Robe’ct Alun 1986. " Durkheim , Frazer, and...34) (I . 4 , 1r f emil (’ i. ( 1&.7’ r,, Ftni:i in, 4 04 (4 .T i aIre black , 74 (1.’l? ) ; r,, Ilispaini , I i,: ( . I1 Ve 0 thl ,r minor i t i.s an

Ship Production Symposium Held in Arlington, Virginia on September 13-15, 1989 (The National Shipbuilding Research Program)

DTIC Science & Technology

1989-09-01

1986. 4. Kaoru Ishikawa , What is Total quality control? The Japanese way, Prentice-Hall, Englewood Cliffs, New Jersey, 1985. 22-1o No. 23 C o m b i n...Y. Ichinose presented a paper which disclosed how standards, including flexible standards, were organized and employed by Ishikawa - jima-Harima Heavy...result by sorting out and relating the causes. The cause-and- effect diagram, sometimes called an “ Ishikawa diagram” after the Japanese professor that

Information Sharing within the COEA Process

DTIC Science & Technology

1993-12-01

Foster. Cost Accounting . EnO Cliffs NJ: Prentice Hall, 1991. Irwin, F.C. An Expert System For Measuring. Inting. and Managing System Performance Factors...AD-A273 906 /El~lhll~lR~IUiM "AFIT/GIR/LAR/93D-9 DTIC ELECTE DEC2 11993 INFORMATION SHARING WITHIN THE COEA PROCESS THESIS Constance S . Maginnis, GS...the Requirements for the Degree of Master of Science in Information Resource Management Constance S . Maginnis, B.S. Michael J. Monroe, M.A. GS-13, USAF

An Analysis of Capitalization of Property in the U.S. Coast Guard.

DTIC Science & Technology

1982-12-01

Calculator Statistics, Naval Post- graduate School, 1981. 11. Horngren , Charles T., Cost Accounting , A Managerial Em- phasis, 4th ed., Prentice-Hall, Inc...of the property accounting system is then evaluated through,,’. oo1473 eDIION or Re No is1 OUsoLITE UNCLASSIFIED S / 1S*I4S5IucumvT CLAWFIICATION Ol... accounting records is required. [Ref. 2: pp. 2-27, 2-28] 26 Acquisition (historical) cost , including set up costs , is considered the primary basis for

An Evaluation of the WSSC (Weapon System Support Cost) Cost Allocation Algorithms. II. Installation Support.

DTIC Science & Technology

1983-06-01

S XX3OXX, or XX37XX is found. As a result, the following two host-financed tenant support accounts currently will be treated as unit operations costs ... Horngren , Cost Accounting : A Managerial Emphasis, Prentice-Hall Inc., Englewood Cliffs, NJ, 1972. 10. D. B. Levine and J. M. Jondrow, "The...WSSC COST ALLOCATION Technical Report ~ALGORITHMS II: INSTALLATION SUPPORT 6. PERFORMING ORG. REPORT NUMBER 7. AUTHOR( S ) 9. CONTRACT OR GRANT NUMBER

The Human Resource Management Information Network (HRMIN): A Cost Comparison in Accordance with Office of Management and Budget (OMB) Circular No. A-76, of 5 April 1979.

DTIC Science & Technology

1984-12-01

documentation details to support this presentation can be obtained from NMPC and NPRDC RMS accounting records. Cost estimates and their underlying 62 S ...Economics, Application, Science Research Associates, 1974. Horngren , C.T., Cost Accounting : A Managerial Emphasis, Prentice-Hall, 1977. Krauss, L.I...that will be encountered in the course of this work. Techniques and terms used in Managerial and Cost Accounting , Economics, the Behavioral Sciences

Oversight of and Within the Department of Defense: Is It Becoming Counterproductive?

DTIC Science & Technology

1991-09-01

impacts of producing at higher more economical rates and ID potential costs at various levels of production Chairman Committee on Appropriations ( S ...1988. Horngren , Charles T. and George Foster. Cost Accounti A Managerial Emphasis. Englewood Cliffs: Prentice-Hall, Inc., 1987. Marsh, Robert T...INSTITUTE OF TECHNOLOGY Wright-Patterson Air Force Base, Ohio 92 2 25 090’ " AF:T/GSM/LSG/91S-16 DTJC S ELECT- MAR0 3 1992 D OVERSIGHT OF AND WITHIN

Would GAAP - Based Accounting Practices Improve Financial Management and Decision-Making in the Department of Defense?

DTIC Science & Technology

1990-08-01

was in complete compliance with the act. 6 U. S . General Accounting Office. Manaaina the Cost of Government: Building an Effective Financial Management...34 Journal of Accountancy , April 1987, 58-70. 10 7. S . General Accounting Office. Managing the Cost of Government: Building and Effective Financial...N. J.: Prentice-Hall, 1981. pp. 62-64. 111 Ibid., pp. 63. 112 Horngren , Charles T. Cost Accounting : A Managerial EEmRhsi, 5th ed., Englewood Cliffs

Assessment of the Potential for Human Resource Accounting in Venezuelan Navy Management Decision Making.

DTIC Science & Technology

1981-12-01

Accounting Association, 1957, op. cit, p. 6. 23. Horngren , Charles, " Cost Accounting : A Managerial Emphasis," Solutions Manual, Prentice-Hall...Model," Management Accounting , December 1977. Savich, R. S . and Ehrenreich, K. E., " Cost /Benefits Analysis of Human Resource Accounting Alternatives...A0A112 T40 NAVAL POSTGRADUATE SCHOOL MONTEREY CA F/ S S / ASSESS1ENT OF THE POTENTIAL FOR HUMAN RESOURCE ACCOUNTING IN VE-ETC(Ul EC GS K FI MARN

Follow the Leader Tracking by Autonomous Underwater Vehicles (AUVs) Using Acoustic Communications and Ranging

DTIC Science & Technology

2003-09-01

590-595, September 1996. Deitel , H.M., Deitel , P.J., Nieto, T.R., Lin, T.M., Sadhu, P., XML: How to Program , Prentice Hall, 2001. Du, Y...communications will result in a total track following error equal to the sum of the errors for the two vehicles........48 xv Figure 36. Test point programming ...Refer to (Hunter 2000), ( Deitel 2001), or similar references for additional information regarding the XML standard. Figure 17. XML example

VoIPNET: A Software Based Communications Tool for Low-Bandwidth Networks

DTIC Science & Technology

2007-06-01

Plan Suplemental Tools. <http://www.dir.state.tx.us/pubs/framework/gate2/riskplan/ Deitel , H.M. and Deitel , P.J. Java: How To Program . 5th...Up. 3rd Edition. California: McGraw-Hill, 2003. Deitel , H.M. and Deitel , P.J. C++: How to Program . 5th Edition. New Jersey: Prentice Hall...users. It is possible for a single user to consume all available bandwidth. Hop limits are programmed during EPLRS 8 network planning. CSMA

Framework for Managing Metadata Security Tags as the Basis for Making Security Decisions.

DTIC Science & Technology

2002-12-01

and Performance,” D.H. Associates, Inc., Sep 2001. [3] Deitel , H. M., and Deitel , P. J., Java How to Program , 3rd Edition, Prentice Hall Inc...1999. [4] Deitel , H. M., Deitel , P. J., and Nieto, T. R., Internet and The World Wide Web: How to Program , 2nd Edition, 2002. [5] Grohn, M. J., A...words) This thesis presents an analysis of a capability to employ CAPCO (Controlled Access Program Coordination Office) compliant Metadata security

Computational Vision: A Critical Review

DTIC Science & Technology

1989-10-01

Optic News, 15:9-25, 1989. [8] H. B . Barlow and R. W. Levick . The mechanism of directional selectivity in the rabbit’s retina. J. Physiol., 173:477...comparison, other formulations, e.g., [64], used 16 @V A \\E(t=t2) (a) \\ E(t-tl) ( b ) Figure 7: An illustration of the aperture problem. Left: a bar E is...Ballard and C. M. Brown. Computer Vision. Prentice-Hall, Englewood Cliffs, NJ, 1982. [7] D. H. Ballard, R. C. Nelson, and B . Yamauchi. Animate vision

Wavevector-Frequency Analysis with Applications to Acoustics

DTIC Science & Technology

1994-01-01

Turbulent Boundary Layer Pressure Measured by Microphone Arrays," Journal of the Acoustical Society of America, vol. 49, no. 3, March 1971 , pp. 862-877. 1...ARplications of Green’s FuntionsinScie,.-and Enginlering, Prentice-Hall, Inc., Englewood Hills, NJ, 1971 . 9. 3. Ffowcs-Williams et al., Modern Methods for...variables of a random process are kalled Joint w.merit ,. The m,n-th joint moment of the random variables, v and w, iz flefined by E ,N 1 f (aB) do d- where

Adaptive Control and Parameter Identification of a Doubly-Fed Induction Generator for Wind Power

DTIC Science & Technology

2011-09-01

Computer Controlled Systems, Theory and Design, Third Edition, Prentice Hall, New Jersey, 1997. [27] R. G. Brown and P. Y.C. Hwang , Introduction to...V n y iT iT , (0.0) with Ts as the sampling interval. From [26], the recursive estimate can be interpreted as a Kalman Filter for the process...by substituting t with n. The recursive equations for the RLS can then be derived from the Kalman filter equations used in [27]: 29 $ $ $ 1 1

Power, Performance, and Perception (P3): Integrating Usability Metrics and Technology Acceptance Determinants to Validate a New Model for Predicting System Usage

DTIC Science & Technology

1999-12-01

Ajzen , I . and M . Fishbein . Understanding Attitudes and Predicting Social Behavior. ’ Prentice-Hall, Englewood Cliffs, NJ: 1980. Alwang, Greg. "Speech...Decline: Computer Introduction in the Financial Industry." Technology Forecasting and Social Change. 31: 143-154. Fishbein , M . and I . Ajzen . Belief...Theory of Reasoned Action (TRA) ( Fishbein and Ajzen , 1980) 13 3. Theory of Planned Behavior (TPB) ( Ajzen , 1991) 15 4. Technology Acceptance Model

Modeling and Performance Optimization of Large-Scale Data-Communication Networks.

DTIC Science & Technology

1981-06-01

IT-17, no. 1, pp. 71-76, 1971. 12. Y. Ho, M. Kastner, and E. Wong, "Teams, market signalling, and information theory," IEEE Trans. Automat. Contr...modifies the flow assignment to satisfy end-to-end delay constraints. 3.2.1 Rationale for Min-Hop Strategr The Min-Hop algorithm proposed in this...Prentice-Hall, 1980. Ho, Y., M. Kostner and E. Wong, "Teams, market signalling, and information theory," IEEE Trans. Automat. Contr., vol. AC-23, pp

A Literature Review of the Bacterium Klebsiella spp.: Grays Harbor and Chehalis River Improvements to Navigation Environmental Studies,

DTIC Science & Technology

1981-04-01

Protection Agency. Braman, S. K., R. J. Eberhart, M. A. Asbury, and G. J. Hermann. 1973. Capsular types of Klebsiella pneumonias associated with bovine ... mastitis . American Veterinary Mcdical Association, 162: 109-111. Brock, T. D. Principles of Microbial Ecology. Prentice-Hall, Inc, New Jersey, 1966...isolates. Applied Microbiology, 28: 672-678. McDonald, T. J., J. S. McDonald, and Rose, D. L. 1970. Aerobic gram-negative rods isolated from bovine

An Exploratory Study of the Use of an Inexpensive Cordless Telephone as a Part of a Data Communications Link.

DTIC Science & Technology

1983-08-26

BJ, p. 3. 15. Brabb, GJ, p.5 - 8. 16. Kotler , Ps Principles of Marketing , Prentice Hall, Englewood Cliffs, NJ, 1980, p. 49. 17. Whittemore, BJ, p...15). Utility is defined as the abilityj to satisfyj a need or desire. The marketing discipline recognizes the four categories of utilityj listed...data. Since information posesses the characteristics of goods in the market place and data is the raw material from which information is derived, it is

FUB at TREC 2008 Relevance Feedback Track: Extending Rocchio with Distributional Term Analysis

DTIC Science & Technology

2008-11-01

starting point is the improved version [ Salton and Buckley 1990] of the original Rocchio’s formula [Rocchio 1971]: newQ = α ⋅ origQ + β R r r∈R ∑ − γR...earlier studies about the low effect of the main relevance feedback parameters on retrieval performance (e.g., Salton and Buckley 1990), while they seem...Relevance feedback in information retrieval. In The SMART retrieval system - experiments in automatic document processing, Salton , G., Ed., Prentice Hall

A Review of the Suitability of Available Computer Aided Software Engineering (CASE) Tools for the Small Software Development Environment

DTIC Science & Technology

1989-07-11

LITERATURE CITED [Boeh73] Boehm, Barry W., "Software and its Impact: A Quantitative Assessment," Datamation, 19, 5, (May 1973), pp 48-59. [Boeh76...Boehm, Barry W., "Software Engineering," IEEE Transactions on Computers, C-25, 12, (December 1976), pp 1226-1241. [Boeh81a] Boehm, Barry W., Software...Engineering Economics, Prentice-Hall, Inc., Englewood Cliffs, NJ, (1981). [Boeh8lb] Boehm, Barry W., "An Experiment in Small Scale Application Software

Transient Heat Transfer in Coated Superconductors.

DTIC Science & Technology

1982-10-29

of the use of the SCEPTRE code are contained in the instruction manual and the book on the code. 30 An example of an actual SCEPTRE program is given in...22. 0. Tsukomoto and S. Kobayashi, J. of Appl. Physics, 46, 1359, (1975) 23. Y Iwasa and B.A. Apgar , Cryogenics 18, 267, (1978) 24. D.E. Baynham, V.W...Computer program for circuit and Systems Analysis. Prentice Hall 1971 and J.C. Bowers et. al. Users Manual for Super-Sceptre Government Document AD/A-OIl

Services Supply Chain in the Department of Defense: Comparison and Analysis of Acquisition Management in the Army, Navy, and Air Force

DTIC Science & Technology

2010-05-01

the marketing of services ( Lovelock , 1992; Hutt & Spec, 1998). Given these differences in the production and marketing of services as opposed to...8(1), 45-57. Hutt, M.D., & Speh, T.W. (1998). Business marketing (6th ed.). New York: Dryden Press. Lovelock , C.H. (1992). Are services really...different? In C.H. Lovelock (Ed.), Managing services (2nd ed.) (pp. 1-8). Englewood Cliffs, NJ: Prentice-Hall. Metters, R., King-Metters, K., & Pullman

Health Care Marketing at Keller Army Community Hospital West Point, New York

DTIC Science & Technology

1982-08-01

Kotler , Philip . Marketing for Nonprofit Organizations. Englewood Cliffs: Prentice-Hall, Inc., 1975. MacStravic, Robin E. Marketing Health Care. Germantown...102 (17 November 1980): 68-81. Kotler , Philip . "What Consumerism Means for Marketers." Harvard Business Review. (May-June, 1972): 50-56. and Levy...As a corollary, Kotler predicts that "between 1,000 and 1,500 hospitals of the 7,000 in the U.S. will close in the next five years.. .one reason

Proceedings of the 2009 Antenna Applications Symposium held in Monticello, Illinois on 22-24 September 2009. Volume 1

DTIC Science & Technology

2009-12-12

Circuit Design, Theory and Applications. Prentice-Hall, 1 ed., 2000. 39 MEASUREMENT OF ELECTRICALLY SMALL ANTENNAS Suhail Barot, Paul E. Mayes, Paul ...2] “Ansoft HFSS, Version 9.2.1,” Ansoft Corporation, Pittsburgh, PA. 50 REDUCED-SIZE LINEAR ANTENNA ELEMENTS Paul E. Mayes, Paul W. Klock and...structures," IRE Internation convention, vol. 5, pp. 119-129, Mar 1957. [2] K. M. P. Aghdam, R. Faraji- Dana , and J. Rashed-Mohassel, "Compact dual

Development of a Multilevel Prevention Program for Improved Relationship Functioning in Active Duty Military Members

DTIC Science & Technology

2015-06-01

8: 345-79. 7. Bandura A: Social Foundations of Thought and Action: A Social and Cognitive Theory . Englewood Cliffs, NJ, Prentice Hall, 1986. 8...Some of you may have experienced the end of the romantic relationship you were in prior to your deployment). We’re interested in learning what have...practices and discipline (e.g., what is cor­ rect child behavior, how to respond to misbehavior) and the need to learn how to constructively

The Cuban Missile Crisis of 1962: A Case Study of the Tailored Use of Instruments of National Power

DTIC Science & Technology

2008-01-01

Counsel 0 Sorensen the President General Maxwell CJCS Llewellyn E. U.S. Ambassador at D. Taylor Thompson Large Table 1. EXCOM Members The Foundations...Prentice Hall, 1970. 5. 12 Knappen, M. M. An Introduction to American Foreign Policy. New York: Harper, 1956. 1. 13 Jones , Howard. Crucible ofPower: A...History ofAmerican Foreign Relationsfrom 1897. Wilmington: SR Books, 2001. 233. 14 Jones 227. 15 Freedman, Lawrence. Kennedy’s Wars: Berlin, Cuba

Proceedings of the Scientific Conference on Obscuration and Aerosol Research Held in Aberdeen Maryland on 27-30 June 1989

DTIC Science & Technology

1990-08-01

corneal structure for both normal and swollen corneas. Other problems of future interest are the understanding of the structure of scarred and dystrophied ...METHOD AND RESULTS The system of equations is solved numerically on a Cray X-MP by a finite element method with 9-node Lagrange quadrilaterals ( Becker ...Appl. Math., 42, 430. Becker , E. B., G. F. Carey, and J. T. Oden, 1981. Finite Elements: An Introduction (Vol. 1), Prentice- Hall, Englewood Cliffs, New

Overview of Megaprogramming Course: Lectures and Exercises

DTIC Science & Technology

1995-02-01

U) aci r0- :3 0- - -aC: +Z.- CO( a00 4-M.2 c E- En (D aCd02 W ~ W > 0 C" a)a : 4r=D = zEC -M Z 0 - whC a)- i-u H0o-0 m 0W coo #C0 00 *z m UE Lu.L 0)r...theACM32:1397-1414. Coad, Peter , and Object-Oriented Analysis. Englewood Cliffs, New Ji,-rscy- Edward Yourdon Prentice-Hall. 1990 Datamation NII I

The Post-Award Costs of Contracting Out: The U.S. Navy’s Implementation of OMB Circular A-76

DTIC Science & Technology

1988-06-01

Commercial Activities (CA) Program Update, 6 April 1987. 4. Horngren , C.T. and Foster, G., Cost Accounting : A Managerial Emphasis, 6th Ed., Prentice-Hall... COSTS OF CONTRACTING OUT: THE U.S. NAVY’S IMPLEMENTATION OF OMB CIRCULAR A-76 12 PERSONAL AUTHOR( S ) Cole. Nancy S . and Cnlp Charla P 13a TYPE OF...of contracting out and identifies those costs that are either underestimated or not accounted for in the cost comparison process. Research was

An Incremental Language Conversion Method to Convert C++ into Ada95

DTIC Science & Technology

1996-12-01

P.J. Deitel , C++ How to Program , Prentice Hall, Englewood Cliffs, NY, 1994. [Dewar94] Robert Dewar, "The GNAT Compilation Model", Proceedings of the...example of how to use GNAT’s C++ low-level interface capabilities to interface an Ada tagged type from C++ programs . Figure I-1 shows the package...husband the best of lucks. I also wish my younger sister, Su- How Sheu, the best of luck in starting her family. iii11 There are so many people I need to

The Forward Masking Effects of Low-Level Laser Glare on Target Location Performance in a Visual Search Task.

DTIC Science & Technology

1992-01-01

Oxford University Press, NY, 1984. 24. Neisser , U ., Cognitive Psychology; Chap. 2, Prentice-Hall, Inc., Englewood Cliffs, NJ, 1967. 25. Enoch, J.M...in this study. (ýRA•,’&l AI IC TA U J Ia oiic ti .y ......... .......... ........ DTIC ~ZTL7 c ~T~DIBy Distribu fo. I "". ’.1’...•’.. - , . 1 ii •0... u -der low-ambient lighting conditions, visual search inside the cockpit on a CRT monitor mounted in the instrument panel is not disrupted by laser

Implementing active-learning strategies to improve physics learning in Latin America

NASA Astrophysics Data System (ADS)

Alarcon, Hugo; Zavala, G.; Fernandez, R.; Benegas, J.

2006-12-01

It is evident that the most effective active-learning strategies to improve physics learning at the college level have been developed in the United States. Recently, some universities in Latin America have begun adopting such methods as a part of institutional projects, or motivated by national projects led by education authorities. In this work we will present two cases, a large-scale implementation of Tutorials in Introductory Physics (1) in Mexico supported by the institution as a part of a change in its educational model, and a medium-scale implementation of this method in Chile supported by the national government. In both experiences, the professors involved in the educational experience have previously participated in a training workshop that prepared them for implementing this strategy in the classroom. The training workshop, described elsewhere (2), was designed also under active learning premises, so teachers completed the proposed activities in the same way as their students will do. We will present the first results of these two projects. References: (1) McDermott, L. C., Shaffer, P. S., & PER (1998). "Tutorials in Introductory Physics", Prentice Hall, translated as "Tutoriales para Física Introductoria" (2001) Prentice Hall, Buenos Aires.. (2) Zavala, G., Alarcón, H. and Benegas, J. (2005). "Innovative training of in-service teachers for active learning: A short teacher development course based on Physics Education Research", accepted for publication, J. of Sc. Teach. Ed. This work has been partially supported by Tecnológico de Monterrey through the Chair in Physics Education Research and by MECE Educación Superior Program (Chile).

Central Problems in the Management of Innovation.

DTIC Science & Technology

1984-12-01

whele environment into the decision processes and wther act iv.it -s of eic, ft th(. org’anization s parts. As a , c .q ’ r ; ,, inn ,i<tivo, pi(,t)I m...sulvin , ib enhanced because i ii t a in its a pi-;(, e nt Ed with the whole "law of the S t C -t i ; -4 LIST 5 NAVAL ACADEMY A.N\\D NAVAL POSTGRADUATE...N.J.: Prentice Hall. Argyris, C . and D. Schon 1983 Reasoning, Learning, and Action, San Francisco: Jossey-Bass. Ashby W. R . 1956 An Introduction to

A Methodology for Project Selection Using Economic Analysis and the Analytic Hierarchy Process

DTIC Science & Technology

1992-09-01

5 L 0.278 G 0.065 Figure 7. Lower Levels for Cost Criterion 58 0 I I i I I 0 BEN’ S #1 0 iL 0. 353 WEIGHT 100% USE DEFF&SAFE MOVE NEW 0 L .333 3 L...and George Foster. Cost Accounting : a Managerial Emphasis (Seventh Edition). Englewood Cliffs NJ: Prentice Hall, 1991. 22. Kankey, Roland D...have cost in terms of manpower and/or dollars if it had been accomplished under contract or if it had been done in-house. Man Years S 4. Often it is not

Identifying Fixed Support Costs in Air Force Visibility and Management of Operating and Support Costs (VAMOSC).

DTIC Science & Technology

1983-04-01

Algorithms I: Overview," Technical Report No. 115-2, Desmatics, Inc., 1983. 6. C. T. Horngren , Cost Accounting : A Managerial Emphasis, Prentice-Hall Inc...CHART NATIONA BUREAUJ OF STAf4DARO-I% 3-A S . . . . . . . . . . I.I i ". ’ 1).N’r1F𔃻I."U FmiXE Sc’pioir COSTS IN A VA,(),C * by Robert L. Gardner Dennis...operations and support (O& S ) costs for Air Force aircraft weapon systems and ground communications-electronics (C-E) systems. Included are fuel, materiel, pay

Reengineering Human Performance and Fatigue Research Through Use of Physiological Monitoring Devices, Web-Based and Mobile Device Data Collection Methods, and Integrated Data Storage Techniques

DTIC Science & Technology

2003-12-01

Lin, T. M. and Sadhu, P. XML How to Program . Prentice Hall, 2001. Dement, W. and Greenberg, S. (1966) “Changes in Total Amount of Stage Four Sleep...training in the science of conducting human research as well as how to use the collection equipment and analysis tools available to them at NPS. In order...redesign? • How will development of a PDA based tracking log give support to process redesign? D. SCOPE OF THESIS In efforts to improve data

The Development of the Role of Assistant Secretary of Defense (Public Affairs) as a Reflection of Mass Media Uses and Functions in the United States Federal Government.

DTIC Science & Technology

1980-06-06

activities during the same day. A military issue, censorship of tactical information, became a problem. Military leaders not only needed to be wary of a...Center, Effective Public Relations (Englewood Cliffs, N.J.: Prentice-Hall, 1971), p. 418. 6. Willia. G. McNamara, "A Critical Analysis of the Formation...Public Law 253 of the United States. The effective date was September 17, 1947, when Secretary of the Navy James Forrestal was sworn in as the first

Final Report on Scientific Activities Pursuant to the Provisions of Grant AFOSR-79-0018 during the Period November 1, 1982 to October 31, 1983.

DTIC Science & Technology

1984-05-01

structure. (See, in particular, the extensive work [A] of de Branges in this connection.) The most familiar of these spaces is the so-called "Paley-Wiener...more to say about this in Section 3. Just as in the case of the Paley-Wiener space and the other, related, spa- ces described by de Branges , the spaces...3] De Branges , L.: "Hilbert Spaces of Entire Functions", Prentice Hall Publ. Co. , Englewood Cliffs, N.J., 1968. [4] Duffin, R. J., and A. C

Research as a guide for developing curricula on wave behavior at boundaries

NASA Astrophysics Data System (ADS)

Kryjevskaia, Mila; Stetzer, Mackenzie; Heron, Paula; McDermott, Lillian

2007-03-01

The Physics Education Group at the University of Washington has been developing research-based instructional materials on mechanical waves and physical optics.* As a part of this ongoing process, we continue to assess and refine existing tutorials. In particular, we are focusing on tutorials designed to help students apply boundary conditions to the propagation and refraction of periodic waves. Pretest and post-test results are being used to inform curriculum modifications and to assess the effectiveness of the revised materials. Specific examples of persistent student difficulties will be presented. * Tutorials in Introductory Physics, L.C. McDermott, P.S. Shaffer and the Physics Education Group at the University of Washington, Prentice Hall (2002)

The Teaching Effectiveness of a Relevant Physics Course

NASA Astrophysics Data System (ADS)

Hobson, Art

1998-04-01

If America is to achieve the science literacy that is ssential to industrialized democracy, all students must study such topics as scientific methodology, pseudoscience, critical thinking, ozone depletion, technological risk, and global warming. My large-enrollment liberal-arts physics course covers the great principles of physics along with several such philosophical and societal topics. Students find these topics relevant and fascinating, leading to strong course evaluations and large enrollments by non-scientists even in courses labeled physics. I will describe this course and present some evidence indicating that the course is effective in communicating physics and its interdisciplinary connections. A textbook, Physics: Concepts and Connections (Prentice Hall, 1995, 2nd edition to appear in June 1998), is available.

On some variational acceleration techniques and related methods for local refinement

NASA Astrophysics Data System (ADS)

Teigland, Rune

1998-10-01

This paper shows that the well-known variational acceleration method described by Wachspress (E. Wachspress, Iterative Solution of Elliptic Systems and Applications to the Neutron Diffusion Equations of Reactor Physics, Prentice-Hall, Englewood Cliffs, NJ, 1966) and later generalized to multilevels (known as the additive correction multigrid method (B.R Huthchinson and G.D. Raithby, Numer. Heat Transf., 9, 511-537 (1986))) is similar to the FAC method of McCormick and Thomas (S.F McCormick and J.W. Thomas, Math. Comput., 46, 439-456 (1986)) and related multilevel methods. The performance of the method is demonstrated for some simple model problems using local refinement and suggestions for improving the performance of the method are given.

GOVERNOR'S COUNCIL CHAMBER; SOUTH WALL, UPPER MIDDLE. Glass plate stereopair ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

GOVERNOR'S COUNCIL CHAMBER; SOUTH WALL, UPPER MIDDLE. Glass plate stereopair number PA-1430-139 LC-HABS-GS05-GC-S-4 157.4836. Right (not printed) - Independence Hall Complex, Independence Hall, 500 Chestnut Street, Philadelphia, Philadelphia County, PA

SECOND FLOOR LOBBY; EAST WALL, UPPER LEFT (R). Glass plate ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

SECOND FLOOR LOBBY; EAST WALL, UPPER LEFT (R). Glass plate stereopair number PA-1430-139 LC-HABS-GS05-2L-E-2 (R) 157.4825. Right (not printed) - Independence Hall Complex, Independence Hall, 500 Chestnut Street, Philadelphia, Philadelphia County, PA

SECOND FLOOR LOBBY; EAST WALL, UPPER LEFT (R). Glass plate ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

SECOND FLOOR LOBBY; EAST WALL, UPPER LEFT (R). Glass plate stereopair number PA-1430-139 LC-HABS-GS05-2L-E-2 (R) 157.4825. Left (printed) - Independence Hall Complex, Independence Hall, 500 Chestnut Street, Philadelphia, Philadelphia County, PA

SECOND FLOOR LOBBY; EAST WALL, UPPER RIGHT (R). Glass plate ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

SECOND FLOOR LOBBY; EAST WALL, UPPER RIGHT (R). Glass plate stereopair number PA-1430-139 LC-HABS-GS05-2L-E-4 (R) 157.4827. Right (not printed) - Independence Hall Complex, Independence Hall, 500 Chestnut Street, Philadelphia, Philadelphia County, PA

SECOND FLOOR LOBBY; EAST WALL, UPPER RIGHT (R). Glass plate ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

SECOND FLOOR LOBBY; EAST WALL, UPPER RIGHT (R). Glass plate stereopair number PA-1430-139 LC-HABS-GS05-2L-E-4 (R) 157.4827. Left (printed) - Independence Hall Complex, Independence Hall, 500 Chestnut Street, Philadelphia, Philadelphia County, PA

Books Noted

NASA Astrophysics Data System (ADS)

Walsh, Edward J.

1999-09-01

Atmospheric Chemistry and Global Change Guy P. Brasseur, John J. Orlando, and Geoffrey S. Tyndall, Eds. Oxford University Press: New York, 1999. xviii + 654 pp. ISBN 0-19-510521-4. 70.00. Advances in Supramolecular Chemistry, Vol. 5 George W. Gokel, Ed. JAI Press: Stamford, CT, 1999. ix + 654 pp. ISBN 1-7623-0447-2. 109.50. Advances in Cycloaddition, Vol. 5 Michael Harmata, Ed. JAI Press: Stamford, CT, 1999. ix + 172 pp. ISBN 0-7623-0346-8. 109.50. Characterization of Powders and Aerosols Brian H. Kaye. Wiley-VCH: New York, 1999. xi + 312 pp. ISBN 3-527-28853-8. 205.00. Chemometrics M. Otto. Wiley-VCH: New York, 1999. xvi + 314 pp. ISBN 3-527-29628-x. 69.95. Flow Measurement Methods and Applications Jim E. Hardy, Jim O. Hylton, Tim E. McKnight, C. J. Remenyik, and Frances R. Ruppel. Wiley-Interscience: New York, 1999. ix + 254 pp. ISBN 0-471-24509-7. 79.95. Tailored Polymeric Materials for Controlled Delivery Systems Iain McCulloch and Shalaby W. Shalaby, Eds. ACS Symposium Series 709. Oxford University Press: New York, 1998. xi + 324 pp. ISBN 0-8412-3585-6. 115.00. Chemistry, 7th Edition Karen C. Timberlake. Addison Wesley Longman: Menlo Park, CA, 1999. xxviii + 740 pp. ISBN 0-321-03767-7. 72.19. General Chemistry, 2nd Edition John W. Hill and Ralph H. Petrucci. Prentice Hall: Upper Saddle River, NJ. 1999. xxvi + 1088 pp + appendix and index. ISBN 0-13-010318-7. $97.00.

Teaching Global Warming

NASA Astrophysics Data System (ADS)

Hobson, Art

2004-05-01

Every citizen's education should include socially relevant science courses because, as the American Association for the Advancement of Science puts it, "Without a scientifically literate population, the outlook for a better world is not promising." I have developed a conceptual liberal-arts physics course that covers the major principles of classical physics, emphasizes modern/contemporary physics, and includes societal topics such as global warming, ozone depletion, transportation, exponential growth, scientific methodology, risk assessment, nuclear weapons, nuclear power, and the energy future. The societal topics, occupying only about 15% of the class time, appear to be the main cause of the surprising popularity of this course among non-scientists. I will outline some ideas for incorporating global warming into such a course or into any other introductory physics course. For further details, see my textbook Physics: Concepts and Connections (Prentice Hall, 3rd edition 2003).

SETI: A good introductory physics topic

NASA Astrophysics Data System (ADS)

Hobson, Art

1997-04-01

If America is to achieve the science literacy that is essential to industrialized democracy, all students must study such topics as scientific methodology, pseudoscience, ozone depletion, and global warming. My large-enrollment liberal-arts physics course covers the great principles of physics along with several such philosophical and societal topics. It is easy to include the interdisciplinary context of physics in courses for non-scientists, because these courses are flexible, conceptual, and taught to students whose interests span a broad range. Students find these topics relevant and fascinating, leading to large enrollments by non-scientists even in courses labeled ''physics.'' I will discuss my approach to teaching the search for extra-terrestrial intelligence (SETI), a topic with lots of good physics and with connections to scientific methodology and pseudoscience. A textbook for this kind of course has been published, Physics: Concepts and Connections (Prentice-Hall, 1995).

6. Historic American Buildings Survey W. N. Manning, Photographer, January ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. Historic American Buildings Survey W. N. Manning, Photographer, January 26, 1935 VIEW OF S.E. HALL AND BANISTERS UPSTAIRS, SHOWING MANTEL ACROSS HALL - Freeman-Caver-Christian House, Upper Friendship Road, Oxford, Calhoun County, AL

3. Historic American Buildings Survey W. N. Manning, Photographer, January ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. Historic American Buildings Survey W. N. Manning, Photographer, January 26, 1935 STAIRS IN HALL SHOWING OLD TIME GUN ON WALL, ALSO LIVING ROOM ACROSS HALL - Freeman-Caver-Christian House, Upper Friendship Road, Oxford, Calhoun County, AL

Role modeling excellence in clinical nursing practice.

PubMed

Perry, R N Beth

2009-01-01

Role modeling excellence in clinical nursing practice is the focus of this paper. The phenomenological research study reported involved a group of 8 nurses identified by their colleagues as exemplary. The major theme revealed in this study was that these exemplary nurses were also excellent role models in the clinical setting. This paper details approaches used by these nurses that made them excellent role models. Specifically, the themes of attending to the little things, making connections, maintaining a light-hearted attitude, modeling, and affirming others are presented. These themes are discussed within the framework of Watson [Watson, J., 1989. Human caring and suffering: a subjective model for health services. In: Watson, J., Taylor, R. (Eds.), They Shall Not Hurt: Human Suffering and Human Caring. Colorado University, Boulder, CO] "transpersonal caring" and [Bandura, A., 1997. Social Learning Theory. Prentice Hall, Englewood Cliffs, NJ] "Social Learning Theory." Particular emphasis in the discussion is on how positive role modeling by exemplary practitioners can contribute to the education of clinical nurses in the practice setting.

My secret: the social meaning of HIV/AIDS stigma.

PubMed

Judgeo, N; Moalusi, K P

2014-01-01

This study uses Goffman's [1963. Stigma: Notes on the Management of Spoiled Identity, New Jersey, Prentice-Hall] theory of stigma as an intellectual scaffold to help understand the social meaning of HIV/AIDS stigma from People Living with HIV/AIDS. The study adopts a qualitative approach because of its appropriateness for unravelling subjective phenomena such as the experiences of HIV/AIDS stigma. In-depth interviews were conducted with 10 HIV-positive employees of a retailing company located in the Western Cape province of South Africa who volunteered to participate in the study. The participants with the discreditable stigma internalised society's prejudice towards those living with the virus. As a result, the participants relied on self-isolation and social withdrawal to cope with enacted stigma. Managing information about one's status and deciding whether, who, when, etc., to tell are crucial questions. The participants feared being devalued by family, friends, co-workers and the community. In concurrence with Goffman [1963], the HIV/AIDS stigma is seen as about relationships.

3. EAST FACADE OF THE UPPER FALLS GATE HOUSE, FOREBAY ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. EAST FACADE OF THE UPPER FALLS GATE HOUSE, FOREBAY IN LEFT FOREGROUND, SPOKANE CITY HALL IN LEFT BACKGROUND, LOOKING WEST. - Washington Water Power Spokane River Upper Falls Hydroelectric Development, Gate House, Spokane River, approximately 0.5 mile northeast of intersection of Spokane Falls Boulevard & Post Street, Spokane, Spokane County, WA

Stratification of welding fumes and grinding particles in a large factory hall equipped with displacement ventilation.

PubMed

Niemelä, R; Koskela, H; Engström, K

2001-08-01

The purpose of the study was to investigate the performance of displacement ventilation in a large factory hall where large components of stainless steel for paper, pulp and chemical industries were manufactured. The performance of displacement ventilation was evaluated in terms of concentration distributions of welding fumes and grinding particles, flow field of the supply air and temperature distributions. Large differences in vertical stratification patterns between hexavalent chromium (Cr(VI)) and other particulate contaminants were observed. The concentration of Cr(VI) was notably lower in the zone of occupancy than in the upper part of the factory hall, whereas the concentrations of total airborne particles and trivalent chromium (Cr(III)) were higher in the occupied zone than in the upper zone. The stratification of Cr(VI) had the same tendency as the air temperature stratification caused by the displacement flow field.

Statistical controversies in clinical research: an initial evaluation of a surrogate end point using a single randomized clinical trial and the Prentice criteria

PubMed Central

Heller, G.

2015-01-01

Surrogate end point research has grown in recent years with the increasing development and usage of biomarkers in clinical research. Surrogacy analysis is derived through randomized clinical trial data and it is carried out at the individual level and at the trial level. A common surrogate analysis at the individual level is the application of the Prentice criteria. An approach for the evaluation of the Prentice criteria is discussed, with a focus on its most difficult component, the determination of whether the treatment effect is captured by the surrogate. An interpretation of this criterion is illustrated using data from a randomized clinical trial in prostate cancer. PMID:26254442

The effect of hand hygiene on illness rate among students in university residence halls.

PubMed

White, Cindy; Kolble, Robin; Carlson, Rebecca; Lipson, Natasha; Dolan, Mike; Ali, Yusuf; Cline, Mojee

2003-10-01

Several studies have indicated a connection between hand sanitization and infection control in numerous settings such as extended care facilities, schools, and hospitals. The purpose of this study was to assess the effectiveness of both a hand-hygiene message campaign and the use of an alcohol gel hand sanitizer in decreasing the incidence of upper-respiratory illness among students living in university residence halls. This study involved a total of 430 students recruited from 4 residence halls during the fall semester at the University of Colorado at the Boulder campus. Dormitories were paired into control and product groups. In the product groups, alcohol gel hand-sanitizer dispensers were installed in every room, bathroom, and dining hall. The data were statistically analyzed for the differences between product and control groups in reported symptoms, illness rates, and absenteeism from classes. The overall increase in hand-hygiene behavior and reduction in symptoms, illness rates, and absenteeism between the product group and control group was statistically significant. Reductions in upper respiratory-illness symptoms ranged from 14.8% to 39.9%. Total improvement in illness rate was 20%. The product group had 43% less missed school/work days. Hand-hygiene practices were improved with increased frequency of handwashing through increasing awareness of the importance of hand hygiene, and the use of alcohol gel hand sanitizer in university dormitories. This resulted in fewer upper respiratory-illness symptoms, lower illness rates, and lower absenteeism.

Advantage of the modified Lunn-McNeil technique over Kalbfleisch-Prentice technique in competing risks

NASA Astrophysics Data System (ADS)

Lukman, Iing; Ibrahim, Noor A.; Daud, Isa B.; Maarof, Fauziah; Hassan, Mohd N.

2002-03-01

Survival analysis algorithm is often applied in the data mining process. Cox regression is one of the survival analysis tools that has been used in many areas, and it can be used to analyze the failure times of aircraft crashed. Another survival analysis tool is the competing risks where we have more than one cause of failure acting simultaneously. Lunn-McNeil analyzed the competing risks in the survival model using Cox regression with censored data. The modified Lunn-McNeil technique is a simplify of the Lunn-McNeil technique. The Kalbfleisch-Prentice technique is involving fitting models separately from each type of failure, treating other failure types as censored. To compare the two techniques, (the modified Lunn-McNeil and Kalbfleisch-Prentice) a simulation study was performed. Samples with various sizes and censoring percentages were generated and fitted using both techniques. The study was conducted by comparing the inference of models, using Root Mean Square Error (RMSE), the power tests, and the Schoenfeld residual analysis. The power tests in this study were likelihood ratio test, Rao-score test, and Wald statistics. The Schoenfeld residual analysis was conducted to check the proportionality of the model through its covariates. The estimated parameters were computed for the cause-specific hazard situation. Results showed that the modified Lunn-McNeil technique was better than the Kalbfleisch-Prentice technique based on the RMSE measurement and Schoenfeld residual analysis. However, the Kalbfleisch-Prentice technique was better than the modified Lunn-McNeil technique based on power tests measurement.

Numerical analysis of pressure field on curved self-weighted metallic roofs due to the wind effect by the finite element method

NASA Astrophysics Data System (ADS)

Del Coz Diaz, J. J.; Garcia Nieto, P. J.; Suarez Dominguez, F. J.

2006-07-01

In this paper, an evaluation of distribution of the air pressure is determined throughout the curved and open self-weighted metallic roof due to the wind effect by the finite element method (FEM) [K. Bathe, Finite Element Procedures, Prentice-Hall, Englewood Cliffs, New York, 1996]. Data from experimental tests carried out in a wind tunnel involving a reduced scale model of a roof was used for comparison. The nonlinearity is due to time-averaged Navier-Stokes equations [C.A.J. Fletcher, Computational Techniques for Fluid Dynamics, Springer, Berlin, 1991] that govern the turbulent flow. The calculation has been carried out keeping in mind the possibility of turbulent flow in the vicinities of the walls, and speeds of wind have been analyzed between 30 and 40 m/s. Finally, the forces and moments are determined on the cover, as well as the distribution of pressures on the same one, comparing the results obtained with the Spanish and European Standards rules, giving place to the conclusions that are exposed in the study.

Addressing Gender Disparity in Introductory Physics Courses: Are existing reforms enough?

NASA Astrophysics Data System (ADS)

Finkelstein, Noah; Pollock, Steven; Dubson, Michael

2007-03-01

Previously researchers have reported that by transforming teaching practices in introductory physics, it is possible to eliminate the disparity in achievement of males and females on measures of conceptual learning. [1] We follow-up on the studies of the original researchers by comparing achievement of male and female students on measures of conceptual learning in the introductory physics courses at a large public research university. Just as the original authors find, we observe that reform teaching practices, such as the use of Peer Instruction [2] increase the learning gains of all students in introductory physics. Additionally, we observe a significant reduction in this gender gap in learning gains in some but not all of our transformed courses. Notably, however, the gender gap does not completely disappear in any of our courses. In addition to discussing learning gains, we analyze shifts in student beliefs [3] and examine correlations between student beliefs and learning gains. [1] Lorenzo, M et al. (2006).Am. J. Phys. 74(2): 118-122 [2] Mazur, E. (1997). Peer Instruction (Prentice Hall). [3] Adams, W.K et al. Physical Review, ST:PER. 2,1,010101.

The Impact of a Health Campaign on Hand Hygiene and Upper Respiratory Illness among College Students Living in Residence Halls.

ERIC Educational Resources Information Center

White, Cindy; Kolble, Robin; Carlson, Rebecca; Lipson, Natasha

2005-01-01

Hand hygiene is a key element in preventing the transmission of cold and flu viruses. The authors conducted an experimental-control design study in 4 campus residence halls to determine whether a message campaign about hand hygiene and the availability of gel hand sanitizer could decrease cold and flu illness and school and work absenteeism. Their…

31. VIEW OF DRILL HALL FROM NORTH END OF DRILL ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

31. VIEW OF DRILL HALL FROM NORTH END OF DRILL FLOOR FACING SOUTH. SHOWS EAST AND WEST BALCONIES, VEHICLE ENTRANCE AT THE SOUTHWEST CORNER OF THE DRILL FLOOR, THE CONCESSION STAND IN THE SOUTHEAST CORNER OF THE DRILL FLOOR AND THE FOUR WINDOWS IN THE SOUTH TRUSS SPACE. NOTE CRACKS IN THE UPPER RIGHT CORNER (WEST) OF THE SOUTH WALL. - Yakima National Guard Armory, 202 South Third Street, Yakima, Yakima County, WA

Computer Based Collaborative Problem Solving for Introductory Courses in Physics

NASA Astrophysics Data System (ADS)

Ilie, Carolina; Lee, Kevin

2010-03-01

We discuss collaborative problem solving computer-based recitation style. The course is designed by Lee [1], and the idea was proposed before by Christian, Belloni and Titus [2,3]. The students find the problems on a web-page containing simulations (physlets) and they write the solutions on an accompanying worksheet after discussing it with a classmate. Physlets have the advantage of being much more like real-world problems than textbook problems. We also compare two protocols for web-based instruction using simulations in an introductory physics class [1]. The inquiry protocol allowed students to control input parameters while the worked example protocol did not. We will discuss which of the two methods is more efficient in relation to Scientific Discovery Learning and Cognitive Load Theory. 1. Lee, Kevin M., Nicoll, Gayle and Brooks, Dave W. (2004). ``A Comparison of Inquiry and Worked Example Web-Based Instruction Using Physlets'', Journal of Science Education and Technology 13, No. 1: 81-88. 2. Christian, W., and Belloni, M. (2001). Physlets: Teaching Physics With Interactive Curricular Material, Prentice Hall, Englewood Cliffs, NJ. 3. Christian,W., and Titus,A. (1998). ``Developing web-based curricula using Java Physlets.'' Computers in Physics 12: 227--232.

The Elements of Teaching Nonscientists: Make it Conceptual, Social, Modern, and Interactive

NASA Astrophysics Data System (ADS)

Hobson, Art

2001-03-01

Physics literacy for all students should be a top priority for every physics department. Reasons include each department's self-interest, and the health of our profession. But most importantly, as the American Association for the Adancement of Science puts it, "Without a scientifically literate population, the outlook for a better world is not promising." Because nonscientists have little need and less desire for algebra-based physics problems, these courses should be conceptual (non-algebraic) although they should certainly be numerate. Since 1976, I have developed and taught a course of this type that includes most of the major principles of physics. Its success has stemmed from (1) a conceptual approach, (2) inclusion of relevant societal topics such as energy resources, scientific methodology, pseudoscience, global warming, and technological risk, (3) modern physics topics that occupy 50instruction techniques even in (especially in!) classes of over 200. I will describe this course and present interactive teaching ideas for one socially relevant topic: transportation and energy efficiency. A textbook is available: Physics: Concepts and Connections, by Art Hobson (Prentice Hall, 2nd Edition 1999). Further info: http://www.uark.edu/depts/physics/about/hobson.html

The Elements of Teaching Nonscientists: Make it Conceptual, Social, Modern, and Interactive

NASA Astrophysics Data System (ADS)

Hobson, Art

2000-04-01

Physics literacy for all students should be a top priority for every physics department. Reasons include each department's self-interest, and the health of our profession. But most importantly, as the American Association for the Adancement of Science puts it, "Without a scientifically literate population, the outlook for a better world is not promising." Because nonscientists have little need and less desire for algebra-based physics problems, these courses should be conceptual (non-algebraic) although they should certainly be numerate. Since 1976, I have developed and taught a course of this type that includes most of the major principles of physics. Its success has stemmed from (1) a conceptual approach, (2) inclusion of relevant societal topics such as energy resources, scientific methodology, pseudoscience, global warming, and technological risk, (3) modern physics topics that occupy 50instruction techniques even in (especially in!) classes of over 200. I will describe this course and conduct an "active learning" demonstration of ideas for teaching one socially relevant topic: transportation and energy efficiency. A textbook is available: Physics: Concepts and Connections, by Art Hobson (Prentice Hall, 2nd Edition 1999). Further info: http://www.uark.edu/depts/physics/about/hobson.html

Role stress amongst nurses at the workplace: concept analysis.

PubMed

Riahi, Sanaz

2011-09-01

The present study explicates the concept of role stress amongst nurses through an analysis adopted from Walker and Avant; Strategies for Theory Construction in Nursing, 4th edn, Prentice Hall, New Jersey, NY. Role stress has become a significant problem amongst nurses and has created much distress leading to burnout among many in the nursing profession. It is significant to analyse the concept of role stress and its relative attributes and consequences, in order to recognize the necessary antecedents needed to create better conditions for nurses at the workplace. A modified method developed by Walker and Avant was used for this concept analysis. A model representing the concept of role stress was developed through careful consideration of the attributes, consequences, antecedents and empirical referents of role stress. The concept analysis of role stress among nurses at the workplace recognized the vulnerability of the nursing discipline towards burnout and distress in general. It is critical to be aware of the current state of health care and note the increased workload created for nurses. Nurses are at a greater vulnerability for role stress, making it imperative for health care organizations to critically evaluate and establish preventative measures for the concept of role stress. 2011 Blackwell Publishing Ltd.

A century-old leadership style revitalizes the heroic hospital.

PubMed

Kania, A J

1993-01-01

"Those who fail history are destined to repeat it." Emmett C. Murphy, Ph.D., an international business consultant found that the key to individual and organizational leadership is a heroic commitment to service and the reengineering of the work that it requires. Murphy, whose clients include IBM, General Motors, Johns Hopkins, Centers for Disease Control, Johnson & Johnson, and Memorial Sloan Kettering; was a consultant with Booz-Allen Hamilton and served on the faculties of the Massachusetts Institute of Technology and the State University of New York before founding E. C. Murphy, Ltd. His firm focuses on the application of quality improvement and work reengineering strategies for creating a patient-focused "heroic" organization. Recently, Dr. Murphy and Michael Snell co-authored an intriguing management book based on the fundamental business strategies historically found in an unlikely western figure. The The Genius of Sitting Bull (Prentice Hall, 1993), Murphy and Snell examine the leadership styles of the Sioux chief and General Custer at the peaks of their careers and used 13 heroic strategies common to Sitting Bull's management style as a metaphor for for successful leadership on the great plains of American health care and business life.

10. Historic American Buildings Survey W. N. Manning, Photographer, January ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

10. Historic American Buildings Survey W. N. Manning, Photographer, January 26, 1935 HALL AND STAIRWAY FROM FRONT DOOR - Freeman-Caver-Christian House, Upper Friendship Road, Oxford, Calhoun County, AL

Surrogate Endpoint Evaluation: Principal Stratification Criteria and the Prentice Definition.

PubMed

Gilbert, Peter B; Gabriel, Erin E; Huang, Ying; Chan, Ivan S F

2015-09-01

A common problem of interest within a randomized clinical trial is the evaluation of an inexpensive response endpoint as a valid surrogate endpoint for a clinical endpoint, where a chief purpose of a valid surrogate is to provide a way to make correct inferences on clinical treatment effects in future studies without needing to collect the clinical endpoint data. Within the principal stratification framework for addressing this problem based on data from a single randomized clinical efficacy trial, a variety of definitions and criteria for a good surrogate endpoint have been proposed, all based on or closely related to the "principal effects" or "causal effect predictiveness (CEP)" surface. We discuss CEP-based criteria for a useful surrogate endpoint, including (1) the meaning and relative importance of proposed criteria including average causal necessity (ACN), average causal sufficiency (ACS), and large clinical effect modification; (2) the relationship between these criteria and the Prentice definition of a valid surrogate endpoint; and (3) the relationship between these criteria and the consistency criterion (i.e., assurance against the "surrogate paradox"). This includes the result that ACN plus a strong version of ACS generally do not imply the Prentice definition nor the consistency criterion, but they do have these implications in special cases. Moreover, the converse does not hold except in a special case with a binary candidate surrogate. The results highlight that assumptions about the treatment effect on the clinical endpoint before the candidate surrogate is measured are influential for the ability to draw conclusions about the Prentice definition or consistency. In addition, we emphasize that in some scenarios that occur commonly in practice, the principal strata sub-populations for inference are identifiable from the observable data, in which cases the principal stratification framework has relatively high utility for the purpose of effect modification analysis, and is closely connected to the treatment marker selection problem. The results are illustrated with application to a vaccine efficacy trial, where ACN and ACS for an antibody marker are found to be consistent with the data and hence support the Prentice definition and consistency.

Surrogate Endpoint Evaluation: Principal Stratification Criteria and the Prentice Definition

PubMed Central

Gilbert, Peter B.; Gabriel, Erin E.; Huang, Ying; Chan, Ivan S.F.

2015-01-01

A common problem of interest within a randomized clinical trial is the evaluation of an inexpensive response endpoint as a valid surrogate endpoint for a clinical endpoint, where a chief purpose of a valid surrogate is to provide a way to make correct inferences on clinical treatment effects in future studies without needing to collect the clinical endpoint data. Within the principal stratification framework for addressing this problem based on data from a single randomized clinical efficacy trial, a variety of definitions and criteria for a good surrogate endpoint have been proposed, all based on or closely related to the “principal effects” or “causal effect predictiveness (CEP)” surface. We discuss CEP-based criteria for a useful surrogate endpoint, including (1) the meaning and relative importance of proposed criteria including average causal necessity (ACN), average causal sufficiency (ACS), and large clinical effect modification; (2) the relationship between these criteria and the Prentice definition of a valid surrogate endpoint; and (3) the relationship between these criteria and the consistency criterion (i.e., assurance against the “surrogate paradox”). This includes the result that ACN plus a strong version of ACS generally do not imply the Prentice definition nor the consistency criterion, but they do have these implications in special cases. Moreover, the converse does not hold except in a special case with a binary candidate surrogate. The results highlight that assumptions about the treatment effect on the clinical endpoint before the candidate surrogate is measured are influential for the ability to draw conclusions about the Prentice definition or consistency. In addition, we emphasize that in some scenarios that occur commonly in practice, the principal strata sub-populations for inference are identifiable from the observable data, in which cases the principal stratification framework has relatively high utility for the purpose of effect modification analysis, and is closely connected to the treatment marker selection problem. The results are illustrated with application to a vaccine efficacy trial, where ACN and ACS for an antibody marker are found to be consistent with the data and hence support the Prentice definition and consistency. PMID:26722639

The Shoreline Vegetation of Lake Oahe a Man Made Fluctuating Water Level Reservoir of the Upper Missouri River Basin.

DTIC Science & Technology

1973-06-01

VANDERVEEN ET AL . UNCLASSIFIED 01 JUN 73 DACW45-73-C-0002 F/G 6/6. NL mmmmmmmmIIIIIIIIIIIIIu IIEIIIEEIIIIEE EEIIIIIIIIIEEE IIIIIIIIIIIIIIfl L 2. i~iIi...fluctuation to be the most impor- tant factor affecting vegetation along reservoir shorelines. Hall et al . (1946) studied reservoirs in the Tennessee Valley...Hall, T. F. et al . 1946. Water level relationships of plants in the Tennessee valley. Tenn. Acad. Sci. 10: 18-60. Houston, W. R. 1960. Effects of water

11. Historic American Buildings Survey Photocopy c. 1923 from J. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

11. Historic American Buildings Survey Photocopy c. 1923 from J. J. Glessner The Story of a House UPPER HALL - NORTH AND WEST SIDES - John J. Glessner House, 1800 South Prairie Avenue, Chicago, Cook County, IL

The upper limit of thermoelectric power factors in the metal-band-insulator crossover of the perovskite-type oxygen deficient system SrTiO(₃- δ/₂).

PubMed

Onoda, Masashige; Tsukahara, Shuichi

2011-02-02

The electronic properties and the thermoelectric power factors in the metal-band-insulator crossover of the perovskite-type oxygen deficient system SrTiO(3 - δ/2) with 0.0046 ≤ δ < 0.06 are explored through measurements of x-ray diffraction, electrical resistivity, thermoelectric power, Hall coefficient and magnetic susceptibility. The metallic transport is confirmed to be basically explained through scattering by electron correlations, acoustic phonons and polar optical phonons, where each scattering coefficient is almost linear in the inverse of the effective carrier concentration estimated from the Hall coefficient. The upper limit of the thermoelectric power factor is 2 × 10( - 3) W m( - 1) K( - 2) with the carrier concentration of 2 × 10(20) cm( - 3) at around the Fermi energy comparable to the Debye temperature.

The upper limit of thermoelectric power factors in the metal-band-insulator crossover of the perovskite-type oxygen deficient system SrTiO3 - δ/2

NASA Astrophysics Data System (ADS)

Onoda, Masashige; Tsukahara, Shuichi

2011-02-01

The electronic properties and the thermoelectric power factors in the metal-band-insulator crossover of the perovskite-type oxygen deficient system SrTiO3 - δ/2 with 0.0046 <= δ < 0.06 are explored through measurements of x-ray diffraction, electrical resistivity, thermoelectric power, Hall coefficient and magnetic susceptibility. The metallic transport is confirmed to be basically explained through scattering by electron correlations, acoustic phonons and polar optical phonons, where each scattering coefficient is almost linear in the inverse of the effective carrier concentration estimated from the Hall coefficient. The upper limit of the thermoelectric power factor is 2 × 10 - 3 W m - 1 K - 2 with the carrier concentration of 2 × 1020 cm - 3 at around the Fermi energy comparable to the Debye temperature.

41. Ground level photograph of two floors of skeleton complete ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

41. Ground level photograph of two floors of skeleton complete with 3rd and 4th floors being started,upper floors of county bldg visible - Chicago City Hall, 121 North LaSalle Street, Chicago, Cook County, IL

Smoking cessation: an application of theory of planned behavior to understanding progress through stages of change.

PubMed

Bledsoe, Linda K

2006-07-01

The purpose of this research was to investigate variables relevant to smoking cessation early in the process of change through an application of the Theory of Planned Behavior [Ajzen, I. (1985). From intentions to actions: A theory of planned behavior. In J. Kuhl and J. Beckman (Eds). Action-control: From cognition to behavior (pp.11-39). Heidelberg: Springer.] to the temporal structure provided by the Transtheoretical Model. Study 1 was a preliminary elicitation study (n=68) conducted to ground the concepts used in the model testing in Study 2 [Ajzen, I., Fishbein, M. (1980). Understanding attitudes and predicting social behavior, Englewood Cliffs, NJ: Prentice-Hall.]. Study 2 tested the proposed model fit with data from a sample of 230 adult smokers. Structural equation modeling did not support the Theory of Planned Behavior as a model of motivation for progress through the stages of change and highlighted measurement issues with perceived behavioral control. A modified model using the Theory of Reasoned Action provided a good fit to the data, accounting for approximately 64% of the variance in intention to quit smoking and stage of change. This research addresses the need for a more complete theoretical rationale for progress through stages of change.

The Theory of Planned Behavior as it predicts potential intention to seek mental health services for depression among college students.

PubMed

Bohon, Lisa M; Cotter, Kelly A; Kravitz, Richard L; Cello, Philip C; Fernandez Y Garcia, Erik

2016-01-01

Between 9.5% and 31.3% of college students suffer from depression (American college health association national college health assessment II: reference group executive summary spring 2013. Amer. Coll. Health Assoc. 2013; Eagan K, Stolzenberg EB, Ramirez JJ, Aragon, MC, Suchard, RS, Hurtado S. The American freshman: national norms fall 2014. Higher Educ. Res. Inst.; 2015). Universities need to understand the factors that relate to care-seeking behavior. Across 3 studies, to relate attitudes, social norms, and perceived behavioral control to intention to seek mental health services, and to investigate barriers to care-seeking. University college students (N = 845, 64% female, 26% male, and 10% unspecified). New measures were created in Studies 1 and 2, and were examined using structural equation modeling in Study 3. Partially consistent with the Theory of Planned Behavior (Ajzen, I, Fishbein, M. Understanding Attitudes and Predicting Social Behavior. Englewood Cliffs, NJ: Prentice-Hall; 1980), a model with an excellent fit revealed that more positive attitudes about care and higher perceived behavioral control directly predicted higher intention to seek mental health services. Educating college students about mental health disorders and treatments, enhancing knowledge about available services, and addressing limited access to long-term care might improve treatment rates for students suffering from depression.

An inquiry into the concept of infancy care based on the perspective of Islam.

PubMed

Jafari-Mianaei, Soheila; Alimohammadi, Nasrollah; Banki-Poorfard, Amir-Hossein; Hasanpour, Marzieh

2017-10-01

All schools of thought believe that infancy is crucial to the formation and development of the human character. Nevertheless, a search of literature revealed the lack of a clear definition of the concept of 'infancy care based on an Islamic perspective' in nursing texts. As the lack of a clear definition of a concept conveys the inapplicability of that concept to its relevant field and community, this study was conducted to explore and determine the characteristic features of the concept of infancy care based on the perspective of Islam. Walker and Avant's (Strategies for theory construction in nursing. Prentice Hall, Boston, 2011) literary concept synthesis as the manner of concept development approach was conducted. Islamic documents were surveyed without any time limitation. Findings involved the extraction of six main concepts, including God as the Merciful Nurturer, mother as the symbol of the Creativity and Divinity of God, infant as a person with dignity and potential for excellence, parents as the nurture way paver, basic principles of nurturing, and holistic lifelong health promotion. The theoretical definition of each concept was presented. From the perspective of Islam, infant care is the nurturing of a human who has been conceived with dignity, certain rights, identity, and the capacity for development and excellence. © 2017 John Wiley & Sons Ltd.

Gap Reversal at Filling Factors 3 +1 /3 and 3 +1 /5 : Towards Novel Topological Order in the Fractional Quantum Hall Regime

NASA Astrophysics Data System (ADS)

Kleinbaum, Ethan; Kumar, Ashwani; Pfeiffer, L. N.; West, K. W.; Csáthy, G. A.

2015-02-01

In the region of the second Landau level several theories predict fractional quantum Hall states with novel topological order. We report the opening of an energy gap at the filling factor ν =3 +1 /3 , firmly establishing the ground state as a fractional quantum Hall state. This and other odd-denominator states unexpectedly break particle-hole symmetry. Specifically, we find that the relative magnitudes of the energy gaps of the ν =3 +1 /3 and 3 +1 /5 states from the upper spin branch are reversed when compared to the ν =2 +1 /3 and 2 +1 /5 counterpart states in the lower spin branch. Our findings raise the possibility that at least one of the former states is of an unusual topological order.

Unsteady Heat and Mass Transfer of Chemically Reacting Micropolar Fluid in a Porous Channel with Hall and Ion Slip Currents

PubMed Central

2014-01-01

This paper presents an incompressible two-dimensional heat and mass transfer of an electrically conducting micropolar fluid flow in a porous medium between two parallel plates with chemical reaction, Hall and ion slip effects. Let there be periodic injection or suction at the lower and upper plates and the nonuniform temperature and concentration at the plates are varying periodically with time. The flow field equations are reduced to nonlinear ordinary differential equations using similarity transformations and then solved numerically by quasilinearization technique. The profiles of velocity components, microrotation, temperature distribution and concentration are studied for different values of fluid and geometric parameters such as Hartmann number, Hall and ion slip parameters, inverse Darcy parameter, Prandtl number, Schmidt number, and chemical reaction rate and shown in the form of graphs. PMID:27419211

78 FR 58334 - Proposed Flood Hazard Determinations

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-23

.... Upper Great Miami, Indiana, Ohio Watershed Shelby County, Ohio, and Incorporated Areas Maps Available... De Tour Village Hall, 260 South Superior Street, De Tour Village, MI 49725. Erie County, Ohio, and... Watershed Lawrence County, Ohio, and Incorporated Areas Maps Available for Inspection Online at: www.fema...

Hall effect analysis in irradiated silicon samples with different resistivities

NASA Astrophysics Data System (ADS)

Borchi, E.; Bruzzi, M.; Dezillie, B.; Lazanu, S.; Li, Z.; Pirollo, S.

1999-08-01

The changes induced by neutron irradiation in n- and p-type silicon samples with starting resistivities from 10 /spl Omega/-cm up to 30 k/spl Omega/-cm, grown using different techniques, as float-zone (FZ), Czochralski (CZ) and epitaxial, have been analyzed by Van der Pauw and Hall effect measurements. Increasing the fluence, each set of samples evolves toward a quasi-intrinsic p-type material. This behavior has been explained in the frame of a two-level model, that considers the introduction during irradiation of mainly two defects. A deep acceptor and a deep donor, probably related to the divacancy and to the C/sub i/O/sub i/ complex, are placed in the upper and lower half of the forbidden gap, respectively. This simple model explains quantitatively the data on resistivity and Hall coefficient of each set of samples up to the fluence of /spl ap/10/sup 14/ n/cm/sup 2/.

Moral Behavior of Resident Assistants: A Lived Experience

ERIC Educational Resources Information Center

Stark, Rachael H.

2013-01-01

Resident Assistants (RAs) are traditionally upper-class students who are responsible for enforcing residence-hall policies (Heala, 2006). These undergraduate paraprofessional students are consistently asked to hold their peers accountable for their behavior, yet this task can be a struggle for those RAs who are unable to display consistently moral…

Electric Propulsion Upper-Stage for Launch Vehicle Capability Enhancement

NASA Technical Reports Server (NTRS)

Kemp, Gregory E.; Dankanich, John W.; Woodcock, Gordon R.; Wingo, Dennis R.

2007-01-01

The NASA In-Space Propulsion Technology Project Office initiated a preliminary study to evaluate the performance benefits of a solar electric propulsion (SEP) upper-stage with existing and near-term small launch vehicles. The analysis included circular and elliptical Low Earth Orbit (LEO) to Geosynchronous Earth Orbit (GEO) transfers, and LEO to Low Lunar Orbit (LLO) applications. SEP subsystem options included state-of-the-art and near-term solar arrays and electric thrusters. In-depth evaluations of the Aerojet BPT-4000 Hall thruster and NEXT gridded ion engine were conducted to compare performance, cost and revenue potential. Preliminary results indicate that Hall thruster technology is favored for low-cost, low power SEP stages, while gridded-ion engines are favored for higher power SEP systems unfettered by transfer time constraints. A low-cost point design is presented that details one possible stage configuration and outlines system limitations, in particular fairing volume constraints. The results demonstrate mission enhancements to large and medium class launch vehicles, and mission enabling performance when SEP system upper stages are mounted to low-cost launchers such as the Minotaur and Falcon 1. Study results indicate the potential use of SEP upper stages to double GEO payload mass capability and to possibly enable launch on demand capability for GEO assets. Transition from government to commercial applications, with associated cost/benefit analysis, has also been assessed. The sensitivity of system performance to specific impulse, array power, thruster size, and component costs are also discussed.

Origin of the ``Ocean Bible"

NASA Astrophysics Data System (ADS)

Munk, W. H.

2002-12-01

``The Oceans" is such a landmark for Sverdrup and the Scripps Institution that one ought to take a look at how it came about. The book came very close to NOT being written. Sverdrup was about to decline an invitation by Prentice Hall when his secretary persuaded him to accept. The contract called for 500-600 pages, it ended up with 1087 pages. Royalty was 10% (\\$0.27 to each author for the copy I purchased in 1943). Sverdrup had estimated a market of 550 copies. By the end of 1965 23,766 copies of the American edition alone had been sold. The book was completed in the early war years under very trying conditions for Sverdrup personally. When it did appear in print, a year after Pearl Harbor, the distribution was restricted to the continental United States because ``...it would be of great aid to the enemy should it fall into his hands." The book carries the mark of Sverdrup's lifelong emphasis on the synthesis of observations: ``we have preferred definite statements to mere enumeration of uncorrelated observations and conflicting interpretations." The result was a coherent presentation of ocean science, a remarkable achievement considering how badly the ocean was undersampled. I will describe my experience as a willing listener while Sverdrup was contemplating of how to organize Chapter XV: The Water Masses and Currents of the Oceans.

Suppression of the Hall number due to charge density wave order in high-Tc cuprates

NASA Astrophysics Data System (ADS)

Sharma, Girish; Nandy, S.; Taraphder, A.; Tewari, Sumanta

2018-05-01

Understanding the pseudogap phase in hole-doped high-temperature cuprate superconductors remains a central challenge in condensed-matter physics. From a host of recent experiments there is now compelling evidence of translational-symmetry-breaking charge density wave (CDW) order in a wide range of doping inside this phase. Two distinct types of incommensurate charge order, bidirectional at zero or low magnetic fields and unidirectional at high magnetic fields close to the upper critical field Hc 2, have been reported so far in approximately the same doping range between p ≃0.08 and p ≃0.16 . In concurrent developments, recent high-field Hall experiments have also revealed two indirect but striking signatures of Fermi surface reconstruction in the pseudogap phase, namely, a sign change of the Hall coefficient to negative values at low temperatures in the intermediate range of hole doping and a rapid suppression of the positive Hall number without a change in sign near optimal doping p ˜0.19 . We show that the assumption of a unidirectional incommensurate CDW (with or without a coexisting weak bidirectional order) at high magnetic fields near optimal doping and the coexistence of both types of orders of approximately equal magnitude at high magnetic fields in the intermediate range of doping may help explain the striking behavior of the low-temperature Hall effect in the entire pseudogap phase.

An entropy-based nonparametric test for the validation of surrogate endpoints.

PubMed

Miao, Xiaopeng; Wang, Yong-Cheng; Gangopadhyay, Ashis

2012-06-30

We present a nonparametric test to validate surrogate endpoints based on measure of divergence and random permutation. This test is a proposal to directly verify the Prentice statistical definition of surrogacy. The test does not impose distributional assumptions on the endpoints, and it is robust to model misspecification. Our simulation study shows that the proposed nonparametric test outperforms the practical test of the Prentice criterion in terms of both robustness of size and power. We also evaluate the performance of three leading methods that attempt to quantify the effect of surrogate endpoints. The proposed method is applied to validate magnetic resonance imaging lesions as the surrogate endpoint for clinical relapses in a multiple sclerosis trial. Copyright © 2012 John Wiley & Sons, Ltd.

Potential surrogate endpoints for overall survival in locoregionally advanced nasopharyngeal carcinoma: an analysis of a phase III randomized trial.

PubMed

Chen, Yu-Pei; Chen, Yong; Zhang, Wen-Na; Liang, Shao-Bo; Zong, Jing-Feng; Chen, Lei; Mao, Yan-Ping; Tang, Ling-Long; Li, Wen-Fei; Liu, Xu; Guo, Ying; Lin, Ai-Hua; Liu, Meng-Zhong; Sun, Ying; Ma, Jun

2015-07-29

The gold standard endpoint in trials of locoregionally advanced nasopharyngeal carcinoma (NPC) is overall survival (OS). Using data from a phase III randomized trial, we evaluated whether progression-free survival (PFS), failure-free survival (FFS), distant failure-free survival (D-FFS) or locoregional failure-free survival (LR-FFS) could be reliable surrogate endpoints for OS. Between July 2002 and September 2005, 316 eligible patients with stage III-IVB NPC were randomly assigned to receive either radiotherapy alone or chemoradiotherapy. 2- and 3-year PFS, FFS, D-FFS, and LR-FFS were tested as surrogate endpoints for 5-year OS using Prentice's four criteria. The Spearman's rank correlation coefficient was calculated to assess the strength of the associations. After a median follow-up time of 5.8 years, 2- and 3-year D-FFS and LR-FFS were not significantly different between treatment arms, in rejection of Prentice's second criterion. Being consistent with all Prentice's criteria, 2- and 3-year PFS and FFS were valid surrogate endpoints for 5-year OS; the rank correlation coefficient was highest (0.84) between 3-year PFS and 5-year OS. In conclusion, PFS and FFS at 2 and 3 years may be candidate surrogate endpoints for OS at 5 years; 3-year PFS may be more appropriate for early assessment of long-term survival.

Identification of surrogate endpoints in patients with locoregionally advanced nasopharyngeal carcinoma receiving neoadjuvant chemotherapy plus concurrent chemoradiotherapy versus concurrent chemoradiotherapy alone.

PubMed

Chen, Yu-Pei; Zhang, Wen-Na; Tang, Ling-Long; Mao, Yan-Ping; Liu, Xu; Chen, Lei; Zhou, Guan-Qun; Mai, Hai-Qiang; Shao, Jian-Yong; Jia, Wei-Hua; Kang, Tie-Bang; Zeng, Mu-Sheng; Sun, Ying; Ma, Jun

2015-11-24

In the era of intensity-modulated radiotherapy (IMRT), the efficacy of additional neoadjuvant chemotherapy (NACT) to concurrent chemoradiotherapy (CCRT) in locoregionally advanced nasopharyngeal carcinoma (NPC) is currently being investigated in ongoing trials. Overall survival (OS) is the gold standard endpoint in NPC trials. We performed this analysis to identify surrogate endpoints for OS, which could shorten follow-up duration and speed up assessment of treatment effects. We retrospectively analysed 208 matched-pair patients with locoregionally advanced NPC receiving NACT+CCRT or CCRT. Progression-free survival (PFS), failure-free survival (FFS), distant failure-free survival (D-FFS) and locoregional failure-free survival (LR-FFS) at 2 and 3 years were assessed as surrogates for 5-year OS according to Prentice's criteria. The strength of the associations were assessed using Spearman's rank correlation coefficient. No significant differences were observed between treatment arms for any surrogate endpoint at 2 years, which rejected Prentice's second criterion. In contrast, 3-year LR-FFS, PFS, FFS and D-FFS were consistent with all four of Prentice's criteria; the rank correlation coefficient (0.730) between 3-year PFS and 5-year OS was highest. 3-year PFS, FFS and D-FFS could be valid surrogate endpoints for 5-year OS; 3-year PFS may be the most accurate.

12. Photographic copy of photograph, I.E. Houk, Jr., photographer, 26 ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

12. Photographic copy of photograph, I.E. Houk, Jr., photographer, 26 September 1951 (original print located at U.S. Bureau of Reclamation Upper Columbia Area Office, Yakima, Washington). "Keechelus Dam spillway. Placing concrete with scoopmobile and 'buggies', Hall Atwater Co." - Keechelus Dam, Spillway, Yakim River, 10 miles northwest of Easton, Easton, Kittitas County, WA

Numerical study for peristalsis of Carreau-Yasuda nanomaterial with convective and zero mass flux condition

NASA Astrophysics Data System (ADS)

Hayat, T.; Ahmed, Bilal; Alsaedi, A.; Abbasi, F. M.

2018-03-01

The present communication investigates flow of Carreau-Yasuda nanofluid in presence of mixed convection and Hall current. Effects of viscous dissipation, Ohmic heating and convective conditions are addressed. In addition zero nanoparticle mass flux condition is imposed. Wave frame analysis is carried out. Coupled differential systems after long wavelength and low Reynolds number are numerically solved. Effects of different parameters on velocity, temperature and concentration are studied. Heat and mass transfer rates are analyzed through tabular values. It is observed that concentration for thermophoresis and Brownian motion parameters has opposite effect. Further heat and mass transfer rates at the upper wall enhances significantly when Hartman number increases and reverse situation is noticed for Hall parameter.

Interpretation of transport measurements in ZnO-thin films

NASA Astrophysics Data System (ADS)

Petukhov, Vladimir; Stoemenos, John; Rothman, Johan; Bakin, Andrey; Waag, Andreas

2011-01-01

In order to interpret results of temperature dependent Hall measurements in heteroepitaxial ZnO-thin films, we adopted a multilayer conductivity model considering carrier-transport through the interfacial layer with degenerate electron gas as well as the upper part of ZnO layers with lower conductivity. This model was applied to the temperature dependence of the carrier concentration and mobility measured by Hall effect in a ZnO-layer grown on c-sapphire with conventional high-temperature MgO and low-temperature ZnO buffer. We also compared our results with the results of maximum entropy mobility-spectrum analysis (MEMSA). The formation of the highly conductive interfacial layer was explained by analysis of transmission electron microscopy (TEM) images taken from similar layers.

Quantum group symmetry of the quantum Hall effect on non-flat surfaces

NASA Astrophysics Data System (ADS)

Alimohammadi, M.; Shafei Deh Abad, A.

1996-02-01

After showing that the magnetic translation operators are not the symmetries of the quantum Hall effect (QHE) on non-flat surfaces, we show that another set of operators which leads to the quantum group symmetries for some of these surfaces exists. As a first example we show that the su(2) symmetry of the QHE on a sphere leads to 0305-4470/29/3/010/img6(2) algebra in the equator. We explain this result by a contraction of su(2). Second, with the help of the symmetry operators of QHE on the Poincaré upper half plane, we will show that the ground-state wavefunctions form a representation of the 0305-4470/29/3/010/img6(2) algebra.

Hall Effect–Mediated Magnetic Flux Transport in Protoplanetary Disks

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bai, Xue-Ning; Stone, James M.

2017-02-10

The global evolution of protoplanetary disks (PPDs) has recently been shown to be largely controlled by the amount of poloidal magnetic flux threading the disk. The amount of magnetic flux must also coevolve with the disk, as a result of magnetic flux transport, a process that is poorly understood. In weakly ionized gas as in PPDs, magnetic flux is largely frozen in the electron fluid, except when resistivity is large. When the disk is largely laminar, we show that the relative drift between the electrons and ions (the Hall drift), and the ions and neutral fluids (ambipolar drift) can playmore » a dominant role on the transport of magnetic flux. Using two-dimensional simulations that incorporate the Hall effect and ambipolar diffusion (AD) with prescribed diffusivities, we show that when large-scale poloidal field is aligned with disk rotation, the Hall effect rapidly drags magnetic flux inward at the midplane region, while it slowly pushes flux outward above/below the midplane. This leads to a highly radially elongated field configuration as a global manifestation of the Hall-shear instability. This field configuration further promotes rapid outward flux transport by AD at the midplane, leading to instability saturation. In quasi-steady state, magnetic flux is transported outward at approximately the same rate at all heights, and the rate is comparable to the Hall-free case. For anti-aligned field polarity, the Hall effect consistently transports magnetic flux outward, leading to a largely vertical field configuration in the midplane region. The field lines in the upper layer first bend radially inward and then outward to launch a disk wind. Overall, the net rate of outward flux transport is about twice as fast as that of the aligned case. In addition, the rate of flux transport increases with increasing disk magnetization. The absolute rate of transport is sensitive to disk microphysics, which remains to be explored in future studies.« less

Ionospheric absorption, typical ionization, conductivity, and possible synoptic heating parameters in the upper atmosphere

DOE Office of Scientific and Technical Information (OSTI.GOV)

Walker, J.K.; Bhatnagar, V.P.

1989-04-01

Relations for the average energetic particle heating and the typical Hall and Pedersen conductances, as functions of the ground-based Hf radio absorption, are determined. Collis and coworkers used the geosynchronous GEOS 2 particle data to relate or ''calibrate'' the auroral absorption on the same magnetic field lines with five levels of D region ionization. These ionospheric models are related to a Chapman layer that extends these models into the E region. The average energetic particle heating is calculated for each of these models using recent expressions for the effective recombination coefficient. The corresponding height-integrated heating rates are determined and relatedmore » to the absorption with a quadratic expression. The average Hall and Pedersen conductivities are calculated for each of the nominal absorption ionospheric models. The corresponding height-integrated conductances for nighttime conditions are determined and related to the absorption. Expressions for these conductances during disturbed sunlit conditions are also determined. These relations can be used in conjunction with simultaneous ground-based riometric and magnetic observations to determines the average Hall and Pedersen currents and the Joule heating. The typical daily rate of temperature increase in the mesosphere for storm conditions is several 10 K for both the energetic particle and the Joule heating. The increasing importance of these parameters of the upper and middle atmospheres is discussed. It is proposed that northern hemisphere ionospheric, current, and heating synoptic models and parameters be investigated for use on a regular basis. copyright American Geophysical Union 1989« less

Regularization of Instantaneous Frequency Attribute Computations

NASA Astrophysics Data System (ADS)

Yedlin, M. J.; Margrave, G. F.; Van Vorst, D. G.; Ben Horin, Y.

2014-12-01

We compare two different methods of computation of a temporally local frequency:1) A stabilized instantaneous frequency using the theory of the analytic signal.2) A temporally variant centroid (or dominant) frequency estimated from a time-frequency decomposition.The first method derives from Taner et al (1979) as modified by Fomel (2007) and utilizes the derivative of the instantaneous phase of the analytic signal. The second method computes the power centroid (Cohen, 1995) of the time-frequency spectrum, obtained using either the Gabor or Stockwell Transform. Common to both methods is the necessity of division by a diagonal matrix, which requires appropriate regularization.We modify Fomel's (2007) method by explicitly penalizing the roughness of the estimate. Following Farquharson and Oldenburg (2004), we employ both the L curve and GCV methods to obtain the smoothest model that fits the data in the L2 norm.Using synthetic data, quarry blast, earthquakes and the DPRK tests, our results suggest that the optimal method depends on the data. One of the main applications for this work is the discrimination between blast events and earthquakesFomel, Sergey. " Local seismic attributes." , Geophysics, 72.3 (2007): A29-A33.Cohen, Leon. " Time frequency analysis theory and applications." USA: Prentice Hall, (1995).Farquharson, Colin G., and Douglas W. Oldenburg. "A comparison of automatic techniques for estimating the regularization parameter in non-linear inverse problems." Geophysical Journal International 156.3 (2004): 411-425.Taner, M. Turhan, Fulton Koehler, and R. E. Sheriff. " Complex seismic trace analysis." Geophysics, 44.6 (1979): 1041-1063.

Fluid Dynamics of the Heart and its Valves

NASA Astrophysics Data System (ADS)

Peskin, Charles S.

1997-11-01

The fluid dynamics of the heart involve the interaction of blood, a viscous incompressible fluid, with the flexible, elastic, fiber-reinforced heart valve leaflets that are immersed in that fluid. Neither the fluid motion nor the valve leaflet motion are known in advance: both must be computed simultaneously by solving their coupled equations of motion. This can be done by the immersed boundary method(Peskin CS and McQueen DM: A general method for the computer simulation of biological systems interacting with fluids. In: Biological Fluid Dynamics (Ellington CP and Pedley TJ, eds.), The Company of Biologists Limited, Cambridge UK, 1995, pp. 265-276.), which can be extended to incorporate the contractile fiber architecture of the muscular heart walls as well as the valve leaflets and the blood. In this way we arrive at a three-dimensional computer model of the heart(Peskin CS and McQueen DM: Fluid dynamics of the heart and its valves. In: Case Studies in Mathematical Modeling: Ecology, Physiology, and Cell Biology (Othmer HG, Adler FR, Lewis MA, and Dallon JC, eds.), Prentice-Hall, Englewood Cliffs NJ, 1996, pp. 309-337.), which can be used as a test chamber for the design of prosthetic cardiac valves, and also to study the function of the heart in health and in disease. Numerical solutions of the equations of cardiac fluid dynamics obtained by the immersed boundary method will be presented in the form of a video animation of the beating heart.

Soft computing analysis of the possible correlation between temporal and energy release patterns in seismic activity

NASA Astrophysics Data System (ADS)

Konstantaras, Anthony; Katsifarakis, Emmanouil; Artzouxaltzis, Xristos; Makris, John; Vallianatos, Filippos; Varley, Martin

2010-05-01

This paper is a preliminary investigation of the possible correlation of temporal and energy release patterns of seismic activity involving the preparation processes of consecutive sizeable seismic events [1,2]. The background idea is that during periods of low-level seismic activity, stress processes in the crust accumulate energy at the seismogenic area whilst larger seismic events act as a decongesting mechanism releasing considerable energy [3,4]. A dynamic algorithm is being developed aiming to identify and cluster pre- and post- seismic events to the main earthquake following on research carried out by Zubkov [5] and Dobrovolsky [6,7]. This clustering technique along with energy release equations dependent on Richter's scale [8,9] allow for an estimate to be drawn regarding the amount of the energy being released by the seismic sequence. The above approach is being implemented as a monitoring tool to investigate the behaviour of the underlying energy management system by introducing this information to various neural [10,11] and soft computing models [1,12,13,14]. The incorporation of intelligent systems aims towards the detection and simulation of the possible relationship between energy release patterns and time-intervals among consecutive sizeable earthquakes [1,15]. Anticipated successful training of the imported intelligent systems may result in a real-time, on-line processing methodology [1,16] capable to dynamically approximate the time-interval between the latest and the next forthcoming sizeable seismic event by monitoring the energy release process in a specific seismogenic area. Indexing terms: pattern recognition, long-term earthquake precursors, neural networks, soft computing, earthquake occurrence intervals References [1] Konstantaras A., Vallianatos F., Varley M.R. and Makris J. P.: ‘Soft computing modelling of seismicity in the southern Hellenic arc', IEEE Geoscience and Remote Sensing Letters, vol. 5 (3), pp. 323-327, 2008 [2] Eneva M. and Ben-Zion Y.: ‘Techniques and parameters to analyze seismicity patterns associated with large earthquakes', Geophysics Res., vol. 102, pp. 17785-17795, 1997a [3] Habermann R. E.: ‘Precursory seismic quiescence: past, present and future', Pure Applied Geophysics, vol. 126, pp. 279-318, 1988 [4] Matthews M. V. and Reasenberg P. A.: ‘Statistical methods for investigating quiescence and other temporal seismicity patterns', Pure Applied Geophysics, vol. 126, pp. 357-372, 1988 [5] Zubkov S. I.: ‘The appearance times of earthquake precursors', Izv. Akad. Nauk SSSR Fiz. Zemli (Solid Earth), No. 5, pp. 87-91, 1987 [6] Dobrovolsky I. P., Zubkov S. I. and Miachkin V. I.: ‘Estimation of the size of earthquake preparation zones', Pageoph, vol. 117, pp. 1025-1044, 1979 [7] Dobrovolsky I. P., Gershenzon N. I. And Gokhberg M. B.: ‘Theory of electrokinetic effects occurring at the final stage in the preparation of a tectonic earthquake', Physics of the Earth and Planetary Interiors, vol. 57, pp. 144-156, 1989 [8] Richter C. F.: ‘Elementary Seismology', W.H.Freeman and Co., San Francisco, 1958 [9] Choy G. L. and Boatwright J. L.: ‘Global patterns of radiated seismic energy and apparent stress', Journal of Geophysical Research, vol. 84 (B5), pp. 2348-2350, 1995 [10] Haykin S.: ‘Neural Networks', 2nd Edition, Prentice Hall, 1999 [11] Jang J., Sun T. and Mizutany E.: ‘Neuro-fuzzy and soft computing', Prentice Hall, Upper Saddle River, NJ, 1997 [12] Konstantaras A., Varley M.R., Vallianatos F., Collins G. and Holifield P.: ‘Detection of weak seismo-electric signals upon the recordings of the electrotelluric field by means of neuron-fuzzy technology', IEEE Geoscience and Remote Sensing Letters, vol. 4 (1), 2007 [13] Konstantaras A., Varley M.R., Vallianatos F., Collins G. and Holifield P.: ‘Neuro-fuzzy prediction-based adaptive filtering applied to severely distorted magnetic field recordings', IEEE Geoscience and Remote Sensing Letters, vol. 3 (4), 2006 [14] Maravelakis E., Bilalis N., Keith J. and Antoniadis A.: ‘Measuring and Benchmarking the Innovativeness of SME's: a three dimensional Fuzzy Logic Approach', Production Planning and Control Journal, vol. 17 (3), pp. 283-292, 2006 [15] Bodri B.: ‘A neural-network model for earthquake occurrence', Geodynamics, vol. 32, pp. 289-310, 2001 [16] Skounakis E., Karagiannis V. and Vlissidis A.: ‘A Versatile System for Real-time Analyzing and Testing Objects Quality', Proceedings-CD of the 4th International Conference on "New Horizons in Industry, Business and Education" (NHIBE 2005), Corfu, Greece, pp. 701-708, 2005

Comment on “Historical perspective on seismic hazard to Hispaniola and the northeast Caribbean region” by U. ten Brink et al.

USGS Publications Warehouse

Prentice, Carol S.; Mann, Paul; Peña, Luis R.

2013-01-01

The analysis of historical earthquakes in the northeastern Caribbean by ten Brink et al. [2011, hereafter TB11] addresses the occurrence of large and destructive historical earthquakes associated with the North American-Caribbean plate boundary. One conclusion presented in TB11 is that the recurrence interval for large earthquakes on the left-lateral, strike-slip Septentrional Fault (SF) (Figure 1a) is approximately 300 years. Their Figure 7 shows rupture of the SF across the entire island of Hispaniola in CE 1200, 1542, and 1842. Our comment challenges this model for SF earthquake recurrence because it is inconsistent with our published paleoseismic data that show no large historical earthquake is associated with surface rupture along the SF east of Santiago (Figure 1a)[Prentice et al., 1993; Mann et al., 1998; Prentice et al., 2003].

DOE Office of Scientific and Technical Information (OSTI.GOV)

Breznay, Nicholas P.; Tendulkar, Mihir; Zhang, Li

Here, we study the two-dimensional superconductor-insulator transition (SIT) in thin films of tantalum nitride. At zero magnetic field, films can be disorder-tuned across the SIT by adjusting thickness and film stoichiometry; insulating films exhibit classical hopping transport. Superconducting films exhibit a magnetic-field-tuned SIT, whose insulating ground state at high field appears to be a quantum-corrected metal. Scaling behavior at the field-tuned SIT shows classical percolation critical exponents zν ≈ 1.3, with a corresponding critical field H c << H c2, the upper critical field. The Hall effect exhibits a crossing point near H c, but with a nonuniversal critical valuemore » ρ c xy comparable to the normal-state Hall resistivity. We propose that high-carrier-density metals will always exhibit this pattern of behavior at the boundary between superconducting and (trivially) insulating ground states.« less

Spin Hall Effect and Weak Antilocalization in Graphene/Transition Metal Dichalcogenide Heterostructures.

PubMed

Garcia, Jose H; Cummings, Aron W; Roche, Stephan

2017-08-09

We report on a theoretical study of the spin Hall Effect (SHE) and weak antilocalization (WAL) in graphene/transition metal dichalcogenide (TMDC) heterostructures, computed through efficient real-space quantum transport methods, and using realistic tight-binding models parametrized from ab initio calculations. The graphene/WS 2 system is found to maximize spin proximity effects compared to graphene on MoS 2 , WSe 2 , or MoSe 2 with a crucial role played by disorder, given the disappearance of SHE signals in the presence of strong intervalley scattering. Notably, we found that stronger WAL effects are concomitant with weaker charge-to-spin conversion efficiency. For further experimental studies of graphene/TMDC heterostructures, our findings provide guidelines for reaching the upper limit of spin current formation and for fully harvesting the potential of two-dimensional materials for spintronic applications.

Superconductor to weak-insulator transitions in disordered tantalum nitride films

NASA Astrophysics Data System (ADS)

Breznay, Nicholas P.; Tendulkar, Mihir; Zhang, Li; Lee, Sang-Chul; Kapitulnik, Aharon

2017-10-01

We study the two-dimensional superconductor-insulator transition (SIT) in thin films of tantalum nitride. At zero magnetic field, films can be disorder-tuned across the SIT by adjusting thickness and film stoichiometry; insulating films exhibit classical hopping transport. Superconducting films exhibit a magnetic-field-tuned SIT, whose insulating ground state at high field appears to be a quantum-corrected metal. Scaling behavior at the field-tuned SIT shows classical percolation critical exponents z ν ≈1.3 , with a corresponding critical field Hc≪Hc 2 , the upper critical field. The Hall effect exhibits a crossing point near Hc, but with a nonuniversal critical value ρxy c comparable to the normal-state Hall resistivity. We propose that high-carrier-density metals will always exhibit this pattern of behavior at the boundary between superconducting and (trivially) insulating ground states.

Potential surrogate endpoints for prostate cancer survival: analysis of a phase III randomized trial.

PubMed

Ray, Michael E; Bae, Kyounghwa; Hussain, Maha H A; Hanks, Gerald E; Shipley, William U; Sandler, Howard M

2009-02-18

The identification of surrogate endpoints for prostate cancer-specific survival may shorten the length of clinical trials for prostate cancer. We evaluated distant metastasis and general clinical treatment failure as potential surrogates for prostate cancer-specific survival by use of data from the Radiation Therapy and Oncology Group 92-02 randomized trial. Patients (n = 1554 randomly assigned and 1521 evaluable for this analysis) with locally advanced prostate cancer had been treated with 4 months of neoadjuvant and concurrent androgen deprivation therapy with external beam radiation therapy and then randomly assigned to no additional therapy (control arm) or 24 additional months of androgen deprivation therapy (experimental arm). Data from landmark analyses at 3 and 5 years for general clinical treatment failure (defined as documented local disease progression, regional or distant metastasis, initiation of androgen deprivation therapy, or a prostate-specific antigen level of 25 ng/mL or higher after radiation therapy) and/or distant metastasis were tested as surrogate endpoints for prostate cancer-specific survival at 10 years by use of Prentice's four criteria. All statistical tests were two-sided. At 3 years, 1364 patients were alive and contributed data for analysis. Both distant metastasis and general clinical treatment failure at 3 years were consistent with all four of Prentice's criteria for being surrogate endpoints for prostate cancer-specific survival at 10 years. At 5 years, 1178 patients were alive and contributed data for analysis. Although prostate cancer-specific survival was not statistically significantly different between treatment arms at 5 years (P = .08), both endpoints were consistent with Prentice's remaining criteria. Distant metastasis and general clinical treatment failure at 3 years may be candidate surrogate endpoints for prostate cancer-specific survival at 10 years. These endpoints, however, must be validated in other datasets.

Terrestrial nitrogen cycling in Earth system models revisited

USGS Publications Warehouse

Stocker, Benjamin D; Prentice, I. Colin; Cornell, Sarah; Davies-Barnard, T; Finzi, Adrien; Franklin, Oskar; Janssens, Ivan; Larmola, Tuula; Manzoni, Stefano; Näsholm, Torgny; Raven, John; Rebel, Karin; Reed, Sasha C.; Vicca, Sara; Wiltshire, Andy; Zaehle, Sönke

2016-01-01

Understanding the degree to which nitrogen (N) availability limits land carbon (C) uptake under global environmental change represents an unresolved challenge. First-generation ‘C-only’vegetation models, lacking explicit representations of N cycling,projected a substantial and increasing land C sink under rising atmospheric CO2 concentrations. This prediction was questioned for not taking into account the potentially limiting effect of N availability, which is necessary for plant growth (Hungate et al.,2003). More recent global models include coupled C and N cycles in land ecosystems (C–N models) and are widely assumed to be more realistic. However, inclusion of more processes has not consistently improved their performance in capturing observed responses of the global C cycle (e.g. Wenzel et al., 2014). With the advent of a new generation of global models, including coupled C, N, and phosphorus (P) cycling, model complexity is sure to increase; but model reliability may not, unless greater attention is paid to the correspondence of model process representations ande mpirical evidence. It was in this context that the ‘Nitrogen Cycle Workshop’ at Dartington Hall, Devon, UK was held on 1–5 February 2016. Organized by I. Colin Prentice and Benjamin D. Stocker (Imperial College London, UK), the workshop was funded by the European Research Council,project ‘Earth system Model Bias Reduction and assessing Abrupt Climate change’ (EMBRACE). We gathered empirical ecologists and ecosystem modellers to identify key uncertainties in terrestrial C–N cycling, and to discuss processes that are missing or poorly represented in current models.

Reflections on some early events related to behavior analysis of child development

PubMed Central

Bijou, Sidney W.

1996-01-01

A series of events related to the early application of behavioral principles to child behavior and development is described. The events began in the 1930s at Columbia University with a solicited letter from John B. Watson suggesting a master's degree thesis problem, and continued through the 1950s and 1960s at the University of Washington. Specifically, these happenings resulted in (a) research demonstrating that Skinner's laboratory method for studying nonhuman organisms could be profitably applied to the laboratory study of young normal children; (b) a demonstration that by successive approximations, a normal child can be operantly conditioned to respond to an arbitrary situation; (c) research showing that the effects of simple schedules of reinforcement obtained with nonhuman organisms could be duplicated in young normal and retarded children; (d) the demonstration that Skinner's operant laboratory method could be adapted to study young children in field situations; (e) research showing that operant principles can be successfully applied to the treatment of a young autistic boy with a serious visual handicap; (f) laboratory studies showing that mothers can be trained to treat their own young children who have behavior problems; (g) an in-home study demonstrating that a mother can treat her own child who has behavior problems; (h) a demonstration that operant principles can be applied effectively to teaching reading, writing, and arithmetic to children with retardation; and (i) publication of a book, Child Development: A Systematic and Empirical Theory, in collaboration with Donald M. Baer, by Prentice Hall in their Century Psychological Series. PMID:22478239

Interrole conflict and self-efficacy to manage work and family demands mediate the relationships of job and family demands with stress in the job and family domains.

PubMed

Smoktunowicz, Ewelina; Cieslak, Roman; Demerouti, Evangelia

2017-09-01

This study derives from Work-Home Resources model (ten Brummelhuis, L. L., & Bakker, A. B. (2012). A resource perspective on the work-home interface: The work-home resources model. American Psychologist, 67(7), 545-556. doi: 10.1037/a0027974 ) and Social Cognitive Theory (Bandura, A. (1986). Social foundations of thought and action: A social cognitive theory. Englewood Cliffs, NJ, US: Prentice-Hall, Inc.) to investigate mechanisms responsible for the effect of job and family demands on work- and family-related perceived stress. We hypothesized that interrole conflict and self-efficacy to manage work and family demands operate either independently or sequentially transmitting the effects of demands on perceived stress. A sample of 100 employees of various occupations participated in the study conducted online in two waves: Time 1 (T1) and Time 2 (T2) with a three-month interval. Regression analysis with bootstrapping was applied. Interrole conflict (T1) did not mediate the relationships between demands (T1) and perceived stress (T2), whereas self-efficacy (T1) mediated only those between family demands (T1) and stress (T2). However, data supported the sequential mediation hypotheses: Demands (T1) were associated with increased interrole conflict (T1) which in turn decreased self-efficacy (T1) and ultimately resulted in the elevated perceived stress at work and in the family (T2). Demands originating in one domain can impact stress both in the same and other life areas through the sequence of interrole conflict and context-specific self-efficacy.

Superconductor to weak-insulator transitions in disordered tantalum nitride films

DOE PAGES

Breznay, Nicholas P.; Tendulkar, Mihir; Zhang, Li; ...

2017-10-31

Here, we study the two-dimensional superconductor-insulator transition (SIT) in thin films of tantalum nitride. At zero magnetic field, films can be disorder-tuned across the SIT by adjusting thickness and film stoichiometry; insulating films exhibit classical hopping transport. Superconducting films exhibit a magnetic-field-tuned SIT, whose insulating ground state at high field appears to be a quantum-corrected metal. Scaling behavior at the field-tuned SIT shows classical percolation critical exponents zν ≈ 1.3, with a corresponding critical field H c << H c2, the upper critical field. The Hall effect exhibits a crossing point near H c, but with a nonuniversal critical valuemore » ρ c xy comparable to the normal-state Hall resistivity. We propose that high-carrier-density metals will always exhibit this pattern of behavior at the boundary between superconducting and (trivially) insulating ground states.« less

Strategic Management for Organizational Effectiveness. The Effect of Human Resource Planning on Retention and Related Issues. Volume 1.

DTIC Science & Technology

1984-12-01

elements which are tied together by * what he terms organizational processes. These elements are (1) the external environment, (2) employees and other...of individual employee need and organizational objectives (Hall, 1976; Walker, 1980). The objectives of human resources departments are the selection...level of upper management to the individual employee (Tichy, et al, -8- 1.: 1982, 1981; Galbraith, 1977). Human resource management, like other

Networks - The Air Force’s Newest Weapon Systems

DTIC Science & Technology

2006-02-17

Force networks. Marshall T. Rose, The Simple Book: An Introduction to Management of TCP/IP based internets, (Englewood Cliffs, New Jersey: Prentice...18 November 2005 19. Rose, Marshall T. The Simple Book: An Introduction to Management of TCP/IP based internets, (Englewood Cliffs, New Jersey

Search for the Θ+ Pentaquark in the γd→ΛnK+ Reaction Measured with the CLAS Spectrometer

NASA Astrophysics Data System (ADS)

Niccolai, S.; Mirazita, M.; Rossi, P.; Baltzell, N. A.; Carman, D. S.; Hicks, K.; McKinnon, B.; Mibe, T.; Stepanyan, S.; Tedeschi, D. J.; Adams, G.; Ambrozewicz, P.; Anefalos Pereira, S.; Anghinolfi, M.; Asryan, G.; Avakian, H.; Bagdasaryan, H.; Baillie, N.; Ball, J. P.; Batourine, V.; Battaglieri, M.; Bedlinskiy, I.; Bektasoglu, M.; Bellis, M.; Benmouna, N.; Berman, B. L.; Biselli, A. S.; Boiarinov, S.; Bouchigny, S.; Bradford, R.; Branford, D.; Briscoe, W. J.; Brooks, W. K.; Bültmann, S.; Burkert, V. D.; Butuceanu, C.; Calarco, J. R.; Careccia, S. L.; Carnahan, B.; Chen, S.; Cole, P. L.; Collins, P.; Coltharp, P.; Crabb, D.; Crannell, H.; Crede, V.; Cummings, J. P.; Dashyan, N.; Degtyarenko, P. V.; de Masi, R.; Deppman, A.; de Sanctis, E.; Deur, A.; Devita, R.; Dharmawardane, K. V.; Djalali, C.; Dodge, G. E.; Donnelly, J.; Doughty, D.; Dugger, M.; Dzyubak, O. P.; Egiyan, H.; Egiyan, K. S.; El Fassi, L.; Elouadrhiri, L.; Eugenio, P.; Fedotov, G.; Feldman, G.; Funsten, H.; Garçon, M.; Gavalian, G.; Gilfoyle, G. P.; Giovanetti, K. L.; Girod, F. X.; Goetz, J. T.; Gonenc, A.; Gordon, C. I. O.; Gothe, R. W.; Griffioen, K. A.; Guidal, M.; Guler, N.; Guo, L.; Gyurjyan, V.; Hadjidakis, C.; Hafidi, K.; Hakobyan, H.; Hakobyan, R. S.; Hardie, J.; Hersman, F. W.; Hleiqawi, I.; Holtrop, M.; Hyde-Wright, C. E.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Isupov, E. L.; Ito, M. M.; Jenkins, D.; Jo, H. S.; Joo, K.; Juengst, H. G.; Kellie, J. D.; Khandaker, M.; Kim, W.; Klein, A.; Klein, F. J.; Klimenko, A. V.; Kossov, M.; Kramer, L. H.; Kubarovsky, V.; Kuhn, J.; Kuhn, S. E.; Kuleshov, S. V.; Lachniet, J.; Langheinrich, J.; Lawrence, D.; Lee, T.; Li, Ji; Livingston, K.; Lu, H.; MacCormick, M.; Markov, N.; Mecking, B. A.; Mellor, J.; Melone, J. J.; Mestayer, M. D.; Meyer, C. A.; Mikhailov, K.; Minehart, R.; Miskimen, R.; Mokeev, V.; Morand, L.; Morrow, S. A.; Moteabbed, M.; Mutchler, G. S.; Nadel-Turonski, P.; Napolitano, J.; Nasseripour, R.; Niculescu, G.; Niculescu, I.; Niczyporuk, B. B.; Niroula, M. R.; Niyazov, R. A.; Nozar, M.; de Oliveira Echeimberg, J.; Osipenko, M.; Ostrovidov, A. I.; Park, K.; Pasyuk, E.; Paterson, C.; Pierce, J.; Pivnyuk, N.; Pocanic, D.; Pogorelko, O.; Pozdniakov, S.; Preedom, B. M.; Price, J. W.; Prok, Y.; Protopopescu, D.; Raue, B. A.; Riccardi, G.; Ricco, G.; Ripani, M.; Ritchie, B. G.; Ronchetti, F.; Rosner, G.; Sabatié, F.; Salgado, C.; Santoro, J. P.; Sapunenko, V.; Schumacher, R. A.; Serov, V. S.; Sharabian, Y. G.; Shvedunov, N. V.; Smith, E. S.; Smith, L. C.; Sober, D. I.; Stavinsky, A.; Stepanyan, S. S.; Stokes, B. E.; Stoler, P.; Strakovsky, I. I.; Strauch, S.; Taiuti, M.; Thoma, U.; Tkabladze, A.; Tkachenko, S.; Todor, L.; Tur, C.; Ungaro, M.; Vineyard, M. F.; Vlassov, A. V.; Watts, D. P.; Weinstein, L. B.; Weygand, D. P.; Williams, M.; Wolin, E.; Wood, M. H.; Yegneswaran, A.; Zana, L.; Zhang, J.; Zhao, B.; Zhao, Z.

2006-07-01

For the first time, the reaction γd→ΛnK+ has been analyzed in order to search for the exotic pentaquark baryon Θ+(1540). The data were taken at Jefferson Laboratory, using the Hall-B tagged-photon beam of energy between 0.8 and 3.6 GeV and the CEBAF Large Acceptance Spectrometer (CLAS). No statistically significant structures were observed in the nK+ invariant-mass distribution. The upper limit on the γd→ΛΘ+ integrated cross section has been calculated and found to be between 5 and 25 nb, depending on the production model assumed. The upper limit on the differential cross section is also reported.

Women and Education: A Canadian Perspective.

ERIC Educational Resources Information Center

Gaskell, Jane, Ed.; McLaren, Arlene, Ed.

This four-part book contains 16 papers that explore the relationship between feminist research and education, especially in Canada. The papers in the first part, "Women as Mothers, Women as Teachers," are as follows: "The Evolution of the Sexual Division of Labour in Teaching" (Danylewycz, Light, Prentice); "More than a…

Design and Evaluation of Dual-Expander Aerospike Nozzle Upper Stage Engine

DTIC Science & Technology

2014-09-18

Nozzle , taken from Martin [2] . . . . . 19 2.3 Typical Liquid Rocket Engine Cycles from Huzel and Huang[3], credit J. Hall[4] 21 2.4 Liquid Rocket Engine...giving the maximum thrust. For steady, supersonic flow (no separation from the nozzle ) the exit pressure is constant for a given engine plus nozzle ...performance independent of a rocket’s nozzle . Assuming one-dimensional, steady, and isentropic flow of a perfect gas gives the definition for characteristic

IPACS Electronics: Comments on the Original Design and Current Efforts at Langley Research Center

NASA Technical Reports Server (NTRS)

Gowdey, J. C.

1983-01-01

The development of the integrated power altitude control system (IPACS) is described. The power bridge was fabricated, and all major parts are in hand. The bridge was tested with a 1/4 HP motor for another program. The PWM, Control Logic, and upper bridge driver power supply are breadboarded and are debugged prior to starting testing on a passive load. The Hall sensor circuit for detecting rotor position is in design.

Ocean Spectral Data Assimilation Without Background Error Covariance Matrix

DTIC Science & Technology

2016-01-01

float data (Chu et al. 2007 ), and 97 temporal and spatial variability of the global upper ocean heat content (Chu 2011) from the data 98 of the Global...Melnichenko OV, Wells NC ( 2007 ) Long baroclinic Rossby waves in the 558 tropical North Atlantic observed from profiling floats. J Geophys Res...Hall, J, Harrison D.E. and Stammer , D., Eds., ESA Publication WPP-610 306. 611 612 Tang Y, Kleeman R (2004) SST assimilation experiments in a

A tight and explicit representation of Q in sparse QR factorization

DOE Office of Scientific and Technical Information (OSTI.GOV)

Ng, E.G.; Peyton, B.W.

1992-05-01

In QR factorization of a sparse m{times}n matrix A (m {ge} n) the orthogonal factor Q is often stored implicitly as a lower trapezoidal matrix H known as the Householder matrix. This paper presents a simple characterization of the row structure of Q, which could be used as the basis for a sparse data structure that can store Q explicitly. The new characterization is a simple extension of a well known row-oriented characterization of the structure of H. Hare, Johnson, Olesky, and van den Driessche have recently provided a complete sparsity analysis of the QR factorization. Let U be themore » matrix consisting of the first n columns of Q. Using results from, we show that the data structures for H and U resulting from our characterizations are tight when A is a strong Hall matrix. We also show that H and the lower trapezoidal part of U have the same sparsity characterization when A is strong Hall. We then show that this characterization can be extended to any weak Hall matrix that has been permuted into block upper triangular form. Finally, we show that permuting to block triangular form never increases the fill incurred during the factorization.« less

Late Cretaceous volcanism in south-central New Mexico: Conglomerates of the McRae and Love Ranch Formations

DOE Office of Scientific and Technical Information (OSTI.GOV)

Chapman-Fahey, J.L.; McMillan, N.J.; Mack, G.H.

Evidence to support Late Cretaceous volcanism in south central New Mexico is restricted to a small area of 75-Ma-old andesitic rocks at Copper Flats near Hillsboro, and volcanic clasts in the McRae (Late Cretaceous/Paleocene ) and Love Ranch (Paleocene/Eocene). Formations located in the Jornada del Muerto basin east and northeast of the Caballo Mountains. Major and trace element data and petrographic analysis of 5 samples from Copper Flats lavas and 40 samples of volcanic clasts from the McRae and Love Ranch conglomerates will be used to reconstruct the Cretaceous volcanic field. The McRae Formation consists of two members: the lowermore » Jose Creek and the upper Hall Lake. The lowermost Love Ranch Formation is unconformable in all places on the Hall Lake Member. Stratigraphic variations in clast composition from volcanic rocks in the lower Love Ranch Formation to Paleozoic and Precambrian clasts in the upper Love Ranch Formation reflect the progressive unroofing of the Laramide Rio Grande Uplift. Volcanic clasts in the McRae and Love Ranch Formations were derived from the west and south of the depositional basin, but the source area for McRae clasts is less well constrained. Stratigraphic, chemical, and petrographic data will be used to reconstruct the volcanic complex and more clearly define magma genesis and metasomatism associated with Laramide deformation.« less

The Astronomy Diagnostic Test: Comparing Your Class to Others

NASA Astrophysics Data System (ADS)

Hufnagel, B.; Deming, G.

1999-05-01

A standard diagnostic test can be a powerful tool to assess the conceptual understanding of students, as has been proven for undergraduate physics instruction over the last ten years (e.g., E.F. Redish and R.N. Steinberg 1999, Physics Today, 52:1, 24). If you are now using, or are considering adopting, a more interactive teaching style such as that used by Eric Mazur (Peer Instruction: a User's Manual, [Prentice-Hall: 1997]) or Michael Zeilik and his collaborators (1997, AJP, 65:12, 987), you may want to use a standard diagnostic test designed for undergraduate astronomy classes. Details of the validation of the ADT are at Slater et al., also presented in this session. A comparative database of ADT scores, by class and by question, can help the instructor assess student preparedness and the effectiveness of alternative teaching methods. In the spring of 1999, 19 astronomy instructors at 7 state universities, 4 community colleges, 4 liberal arts schools, 1 woman's college and 1 technical university across the USA gave the ADT to their classes once at the beginning of the course, and again at the end of the course. The average pre-course ADT scores by class from these ~ 1000 students show two surprising results: the conceptual understanding of introductory classes is about the same (34%) regardless of type of school, geographic location, or average student age. However, there is a significant gender difference, with females scoring an average of 29% and males 39%, with the standard errors both less than 1%. The Astronomy Diagnostic Test (ADT) and its comparative by-class database will be available at the National Institute for Science Education (NISE) website after 1 June 1999. This research was supported by the National Science Foundation through Grant DGE-9714489, and by the generosity of the participating astronomy instructors.

Empirical meaning of DTM multifractal parameters in the precipitation context

NASA Astrophysics Data System (ADS)

Portilla Farfan, Freddy; Valencia, Jose Luis; Villeta, Maria; Tarquis, Ana M.; Saa-Requejo, Antonio

2015-04-01

The main objective of this research is to interpret the multifractal parameters in the case of precipitation series from an empirical approach. In order to do so nineteen precipitation series were generated with a daily precipitation simulator derived from year and month estimations and considering the classical statistics, used commonly in hydrology studies, from actual data of four Spanish rain gauges located in a gradient from NW to SE. For all generated series the multifractal parameters were estimated following the technique DTM (Double Trace Moments) developed by Lavalle et al. (1993) and the variations produced considered. The results show the following conclusions: 1. The intermittency, C1, increases when precipitation is concentrating for fewer days, making it more variable, or when increasing its concentration on maximum monthly precipitation days, while it is not affected due to the modification in the variability in the number of days rained. 2. Multifractility, α, increases with the number of rainy days and the variability of the precipitation, yearly as well as monthly, as well as with the concentration of precipitation on the maximum monthly precipitation day. 3. The maximum probable singularity, γs, increases with the concentration of rain on the day of the maximum monthly precipitation and the variability in yearly and monthly level. 4. The non-conservative degree, H, depends on the number of rainy days that appear on the series and secondly on the general variability of the rain. References Lavallée D., S. Lovejoy, D. Schertzer and P. Ladoy, 1993. Nonlinear variability and landscape topography: analysis and simulation. In: Fractals in Geography (N. Lam and L. De Cola, Eds.) Prentice Hall, Englewood Cliffs, 158-192.

Development, validation, and factorial comparison of the McGill Self-Efficacy of Learners For Inquiry Engagement (McSELFIE) survey in natural science disciplines

NASA Astrophysics Data System (ADS)

Ibrahim, Ahmed; Aulls, Mark W.; Shore, Bruce M.

2016-11-01

Sociocognitive theory [Bandura, A. (1986). Social foundations of thought and action: A social cognitive theory. Englewood Cliffs, NJ: Prentice Hall; Bandura, A. (1989). Human agency in social cognitive theory. American Psychologist, 44, 1175-1184. doi:10.1037/0003-066x.44.9.1175; Bandura, A. (1991). Social cognitive theory of self-regulation. Organizational Behavior and Human Decision Processes, 50, 248-287. doi:10.1016/0749-5978(91)90022-L] accords high importance to the mechanisms of human agency and how they are exercised through self-efficacy. In this paper, we developed and validated the McGill Self-Efficacy For Inquiry Engagement (McSELFIE) instrument with undergraduate students in natural science disciplines. We defined inquiry engagement as carrying out the practices of science (POS) that are supported by students' personality characteristics (SPCs) and that result in achieving inquiry-learning outcomes (ILOs). Based on these theoretical perspectives, the McSELFIE is a 60-item, learner-focused survey that addresses three components that are theoretically important for engaging in scientific inquiry: (a) SPCs, (b) ILOs, and (c) POS. Evidence for construct and content validity were obtained by using experts' judgments and confirmatory factor analysis with a sample of 110 undergraduate students enrolled in science disciplines. Internal consistency of the factors and instrument was also examined. The McSELFIE instrument is a reliable and valid instrument for measuring science undergraduate students' self-efficacy for inquiry engagement. Matched pairs analyses were conducted among the instruments' factors. Students reported the highest self-efficacy for openness, applying knowledge, and carrying out investigations. Students reported the lowest self-efficacy for extraversion, understanding metacognitive knowledge, and planning investigations. Theoretical and practical implications are discussed.

Quasiparticle Excitations in the Superconducting State of FeSe Probed by Thermal Hall Conductivity in the Vicinity of the BCS-BEC Crossover

NASA Astrophysics Data System (ADS)

Watashige, Tatsuya; Arsenijević, Stevan; Yamashita, Takuya; Terazawa, Daiki; Onishi, Takafumi; Opherden, Lars; Kasahara, Shigeru; Tokiwa, Yoshifumi; Kasahara, Yuichi; Shibauchi, Takasada; von Löhneysen, Hilbert; Wosnitza, Jochen; Matsuda, Yuji

2017-01-01

There is growing evidence that the superconducting semimetal FeSe (Tc ˜ 8 K) is in the crossover regime between weak-coupling Bardeen-Cooper-Schrieffer (BCS) and strong-coupling Bose-Einstein-condensate (BEC) limits. We report on longitudinal and transverse thermal conductivities, κxx and κxy, respectively, in magnetic fields up to 20 T. The field dependences of κxx and κxy imply that a highly anisotropic small superconducting gap forms at the electron Fermi-surface pocket whereas a more isotropic and larger gap forms at the hole pocket. Below ˜1.0 K, both κxx and κxy exhibit distinct anomalies (kinks) at the upper critical field Hc2 and at a field H* slightly below Hc2. The analysis of the thermal Hall angle (κxy/κxx) indicates a change of the quasiparticle scattering rate at H*. These results provide strong support to the previous suggestion that above H* a distinct field-induced superconducting phase emerges with an unprecedented large spin imbalance.

Design and Characterization of a Secure Automatic Dependent Surveillance-Broadcast Prototype

DTIC Science & Technology

2015-03-26

during the thesis process. Thank you to Mr. Dave Prentice of AFRL for providing the Aeroflex IFR 6000 baseband signals, upon which many design decisions...35 25 Example Aeroflex IFR 6000 signal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 26...Global Positioning System HDL hardware description language I in-phase IFR Instrument Flight Rules IP Internet Protocol IP intellectual property IPSec

Acceleration and focusing of plasma flows

DOE Office of Scientific and Technical Information (OSTI.GOV)

Griswold, Martin Elias

The acceleration of flowing plasmas is a fundamental problem that is useful in a wide variety of technological applications. We consider the problem from the perspective of plasma propulsion. Gridded ion thrusters and Hall thrusters are the most commonly used devices to create flowing plasma for space propulsion, but both suffer from fundamental limitations. Gridded ion sources create good quality beams in terms of energy spread and spatial divergence, but the Child-Langmuir law in the non-neutral acceleration region limits the maximum achievable current density. Hall thrusters avoid this limitation by accelerating ions in quasi-neutral plasma but, as a result, producemore » plumes with high spatial divergence and large energy spread. In addition the more complicated magnetized plasma in the Hall Thruster produces oscillations that can reduce the efficiency of the thruster by increasing electron transport to the anode. We present investigations of three techniques to address the fundamental limitations on the performance of each thruster. First, we propose a method to increase the time-averaged current density (and thus thrust density) produced by a gridded ion source above the Child-Langmuir limit by introducing time-varying boundary conditions. Next, we use an electrostatic plasma lens to focus the Hall thruster plume, and finally we develop a technique to suppress a prominent oscillation that degrades the performance of Hall thrusters. The technique to loosen the constraints on current density from gridded ion thrusters actually applies much more broadly to any space charge limited flow. We investigate the technique with a numerical simulation and by proving a theoretical upper bound. While we ultimately conclude that the approach is not suitable for space propulsion, our results proved useful in another area, providing a benchmark for research into the spontaneously time-dependent current that arises in microdiodes. Next, we experimentally demonstrate a novel approach to reducing plume divergence by using a PL located in the plume of the thruster to focus ions after they were ionized and accelerated. Finally we further improve thruster operation by suppressing a prominent low frequency oscillation in the thruster known as the rotating spoke. The suppression leads to decreased electron transport and more control over the operating conditions in the thruster.« less

Piezoelectric Ignition of Nanocomposite Energetic Materials

DTIC Science & Technology

2013-01-01

Sensitivity, Piezoelectric Crystals, Nanoparticles, Thermites Eric Collins, Michelle L Pantoya, Andreas Neuber, Michael Daniels, Daniel Prentice...use of PZT as an alternative ignition source. Key Words: Aluminum, Ignition, Combustion, Piezocrystal, Nanoparticles, Thermites ... thermites ,” Combustion and Flame, vol. 138, no. 4, pp. 373–383, Sep. 2004. [13] T. Bazyn, N. Glumac, H. Krier, T. S. Ward, M. Schoenitz, and E. L

Statistical Validation of Surrogate Endpoints: Another Look at the Prentice Criterion and Other Criteria.

PubMed

Saraf, Sanatan; Mathew, Thomas; Roy, Anindya

2015-01-01

For the statistical validation of surrogate endpoints, an alternative formulation is proposed for testing Prentice's fourth criterion, under a bivariate normal model. In such a setup, the criterion involves inference concerning an appropriate regression parameter, and the criterion holds if the regression parameter is zero. Testing such a null hypothesis has been criticized in the literature since it can only be used to reject a poor surrogate, and not to validate a good surrogate. In order to circumvent this, an equivalence hypothesis is formulated for the regression parameter, namely the hypothesis that the parameter is equivalent to zero. Such an equivalence hypothesis is formulated as an alternative hypothesis, so that the surrogate endpoint is statistically validated when the null hypothesis is rejected. Confidence intervals for the regression parameter and tests for the equivalence hypothesis are proposed using bootstrap methods and small sample asymptotics, and their performances are numerically evaluated and recommendations are made. The choice of the equivalence margin is a regulatory issue that needs to be addressed. The proposed equivalence testing formulation is also adopted for other parameters that have been proposed in the literature on surrogate endpoint validation, namely, the relative effect and proportion explained.

Synthesis and characterization of indium doped La{sub 3}Co{sub 4}Sn{sub 13} skutterudite superconductor

DOE Office of Scientific and Technical Information (OSTI.GOV)

Neha, P.; Srivastava, P.; Shruti,

2016-05-06

We report the synthesis and characterization of a novel superconductor La{sub 3}Co{sub 4}Sn{sub 12.35}In{sub 0.65} by Indium doping at Tin site in parent compound La{sub 3}Co{sub 4}Sn{sub 13}. We observe enhanced T{sub c} along with improved superconducting properties as onset compared to parent compound. By transport measurements we get superconducting transition with T{sub c}{sup onset} = 4.7 K and T{sub c}{sup zero} = 3.2 K. In magnetization measurements (ZFC-FC) superconducting transition is observed at 5.1 K. Upper critical field (H{sub c2}) and lower critical field (H{sub c1}) calculated by magneto resistance and M-H loop measurement are found to be 1.65more » T and 0.0026 T respectively. Hall measurement shows the majority charge carrier as electrons with carrier density of the order of 10{sup 19} cm{sup −3}. TEP measurement also support the Hall data as the Seebeck coefficient is negative over whole temperature range of measurement.« less

Terahertz response in the quantum-Hall-effect regime of a quantum-well-based charge-sensitive infrared phototransistor

NASA Astrophysics Data System (ADS)

Nakagawa, Daisuke; Takizawa, Kazuhiro; Ikushima, Kenji; Kim, Sunmi; Patrashin, Mikhail; Hosako, Iwao; Komiyama, Susumu

2018-04-01

The characteristics of a charge-sensitive infrared phototransistor (CSIP) based on a GaAs/AlGaAs multiple quantum-well (QW) structure are studied under a magnetic field. In the CSIP, the upper QWs serve as a floating gate that is charged by photoexcitation. The photoinduced charges are detected using the resistance of the lowest QW conducting channel. The conducting channel exhibits the integer quantum Hall effect (QHE) in a perpendicular high magnetic field, yielding the magnetic field dependence of the terahertz (THz) response ΔR. We found two different features of ΔR. One is that ΔR switches sign across the QHE plateau, which is explained simply by an increased electron density in the conducting channel. The other feature is observed as an enhanced positive ΔR when a potential barrier is formed in the conducting channel. The latter mechanism can be interpreted as the promotion of edge/bulk scattering due to photoinduced charges. These findings suggest ways to enhance the THz response by using magnetic fields and potential barriers.

Graphical Requirements for Force Level Planning. Volume 2

DTIC Science & Technology

1991-09-01

technology review includes graphics algorithms, computer hardware, computer software, and design methodologies. The technology can either exist today or...level graphics language. 7.4 User Interface Design Tools As user interfaces have become more sophisticated, they have become harder to develop. Xl...Setphen M. Pizer, editors. Proceedings 1986 Workshop on Interactive 31) Graphics , October 1986. 18 J. S. Dumas. Designing User Interface Software. Prentice

Nitrogen Fertilization of Corn: Plant Biochemistry Effects and Carbon Cycle Implications

NASA Astrophysics Data System (ADS)

Gallagher, M. E.; Hockaday, W. C.; Masiello, C. A.; McSwiney, C. P.; Robertson, G. P.; Baldock, J. A.

2008-05-01

Atmospheric carbon dioxide (CO2) concentrations are rising due to anthropogenic CO2 emissions (Alley et al. 2007; Prentice et al. 2001). About half of the anthropogenic CO2 emitted during the 1990s was absorbed by the terrestrial biosphere and ocean (Prentice et al. 2001). It is possible to estimate the size of terrestrial and oceanic carbon sinks individually using atmospheric CO2 and O2 measurements (Keeling et al. 1996). To best estimate the sizes of these carbon sinks, we need to accurately know the oxidative ratio (OR) of the terrestrial biosphere (Randerson et al. 2006). OR is the ratio of the moles of O2 released per moles of CO2 consumed in gas fluxes between the terrestrial biosphere and atmosphere. Though it is likely that the net OR of the biosphere varies with ecosystem type and nutrient status, OR is assumed constant in carbon sink apportionment calculations (e.g. Prentice et al. 2001). Small shifts in OR can lead to large variations in the calculated sizes of the terrestrial biosphere and ocean carbon sinks (Randerson et al. 2006). OR likely shifts with changes in climate, nutrient status, and land use. These shifts are due, in part, to shifts in plant biochemistry. We are measuring ecosystem OR in corn agricultural ecosystems under a range of nitrogen fertilization treatments at the Kellogg Biological Station-Long Term Ecological Research Site (KBS-LTER) in Michigan. We measure OR indirectly, through its relationship with organic carbon oxidation state (Cox) (Masiello et al. in press 2008). Cox can be measured through elemental analysis and, with basic knowledge of plant nitrogen use patterns, Cox values can be converted to OR values. Cox can also be measured through 13C nuclear magnetic resonance spectroscopy (NMR), which can be combined with a molecular mixing model to determine Cox, OR, and plant biochemical composition (i.e. percentage carbohydrates, lignin, lipids, and proteins) (Baldock et al. 2004). Here we present data showing the effects of varying corn ecosystem nitrogen fertilization rates (from 0 to 292 kg N/ha) on ecosystem OR and plant biochemistry.

Leaf anatomy of a late Palaeozoic cycad

PubMed Central

Lv, Yong; Guo, Yun; Wei, Hai-Bo

2017-01-01

Today, cycads are a small group of gymnospermous plants with a limited distribution in the (sub)tropics, but they were major constituents of Mesozoic floras. Fossil leaves sporadically found in latest Carboniferous and Permian floras have putatively been ascribed to cycads. However, their true affinity remains unclear due to the lack of anatomical evidence. Virtually all modern cycads have pinnate leaves, but this type of leaf morphology is by no means unique for cycads. Pinnate leaves of Plagiozamites oblongifolius Halle 1927 with well-preserved cuticles showing the epidermal anatomy are here described from the upper Permian Xuanwei Formation of Yunnan Province, Southwest China. The cuticles show a clear differentiation into costal and intercostal zones; stomata are confined to the intercostal zones on both the upper and lower leaf surfaces. The external morphology and the epidermal anatomy of these fossil leaves are closely comparable with those of extant cycads, particularly members of the family Zamiaceae. PMID:29093177

Upper Mississippi River Headwaters Reservoirs Damsites Cultural Resources Investigation. Lake Winnibigoshish, Leech Lake, Pokegema Lake, Sandy Lake, Pine River and Gull Lake Reservoirs, Minnesota

DTIC Science & Technology

1988-02-01

Anthony Falls Water Company, who deeded 1995 acres of land at Gull Lake for the purpose (Kane, 1966: 159). Despite the unique nature of the reservoir system...dwelling, laborers’ quarters, engineers’ quarters, a dining hall, an office building, an officer’s ho.se, a wood shed, a chicken coop, a barn, a...a barn, carpenter and blacksmith shops, two warehouses, a wood shed and a chicken coop (Figure 42). The "new" dwelling was destroyed by another fire

Lipotoxicity, β cell dysfunction, and gestational diabetes.

PubMed

Nolan, Christopher J

2014-04-01

Gestational diabetes (GDM) is caused by failure of islet β cells to meet the increased insulin requirements of pregnancy. Recently, Prentice et al. (2014) discovered a 7-fold elevation of the furan fatty acid metabolite 3-carboxy-4-methyl-5-propyl-2-furanopropanoic acid (CMPF) in plasma of women with GDM and showed that CMPF directly induces β cell dysfunction. Copyright © 2014 Elsevier Inc. All rights reserved.

Multi-Sample Cluster Analysis Using Akaike’s Information Criterion.

DTIC Science & Technology

1982-12-20

of Likelihood Criteria for I)fferent Hypotheses," in P. A. Krishnaiah (Ed.), Multivariate Analysis-Il, New York: Academic Press. [5] Fisher, R. A...Methods of Simultaneous Inference in MANOVA," in P. R. Krishnaiah (Ed.), rultivariate Analysis-Il, New York: Academic Press. [8) Kendall, M. G. (1966...1982), Applied Multivariate Statisti- cal-Analysis, Englewood Cliffs: Prentice-Mall, Inc. [1U] Krishnaiah , P. R. (1969), "Simultaneous Test

Prospects for Reenlistment of Prior-Service Personnel.

DTIC Science & Technology

1984-02-01

abilities and characteris- tics in common ( Kotler 1980, Chapter 10). The several segments, in turn, should be distinguishable from one another...Klecka, W. R. Discriminant Analysis. Beverly Hills, CA: Sage Publica- tions, 1980. Kotler , P. Principles of Marketing. Englewood Cliffs, NJ: Prentice...Library Naval War College Newport, RI 02940 Mr. Philip Bernard B-K Dynamics, Inc. 15825 Shady Grove Road Rockville, MD 20850 Dr. Bruce M. Meglino College of

Influence function based variance estimation and missing data issues in case-cohort studies.

PubMed

Mark, S D; Katki, H

2001-12-01

Recognizing that the efficiency in relative risk estimation for the Cox proportional hazards model is largely constrained by the total number of cases, Prentice (1986) proposed the case-cohort design in which covariates are measured on all cases and on a random sample of the cohort. Subsequent to Prentice, other methods of estimation and sampling have been proposed for these designs. We formalize an approach to variance estimation suggested by Barlow (1994), and derive a robust variance estimator based on the influence function. We consider the applicability of the variance estimator to all the proposed case-cohort estimators, and derive the influence function when known sampling probabilities in the estimators are replaced by observed sampling fractions. We discuss the modifications required when cases are missing covariate information. The missingness may occur by chance, and be completely at random; or may occur as part of the sampling design, and depend upon other observed covariates. We provide an adaptation of S-plus code that allows estimating influence function variances in the presence of such missing covariates. Using examples from our current case-cohort studies on esophageal and gastric cancer, we illustrate how our results our useful in solving design and analytic issues that arise in practice.

Analysis of Cost Growth and Cost Composition in the Defense Aerospace Industry

DTIC Science & Technology

1988-09-01

Making. New York: Harcourt Brace Jovanovich, Inc., 1977. 16. Horngren , Charles T. Cost Accounting , A Managerial Emphasis. Englewood Cliffs NJ: Prentice...58 7. Scatter Plot of Cost /DL Hour Ratio, Data Set C ................ .................. 59 8. Scatter Plot of Cost /DL S Ratio, Data Set...C 62 9. Scatter Plot of Cost /DL S Ratio, Then-Year Dollars ................... .................... 63 10. Scatter Plot of OH/TC Ratio, Data Set C

The Coast Artillery Journal. Volume 64, Number 5, May 1926

DTIC Science & Technology

1926-05-01

PROFESSIONAL NOTES Non-Detonating Motor Fnels By hEUT. COL. JAMES PRENTICE Coast Artiller)" Corps No longer need the refiner market his cracked...principles involved. Shortly after this there appeared on the market some sickly yellow gasolines which, when burned in gas engines, emitted frightful...odors. These came in for the ridicule and disapproval of the popular press and soon disappeared from the market . Technical men said that these gasses

Observation of the Zero Hall Plateau in a Quantum Anomalous Hall Insulator

DOE Office of Scientific and Technical Information (OSTI.GOV)

Feng, Yang; Feng, Xiao; Ou, Yunbo

We report experimental investigations on the quantum phase transition between the two opposite Hall plateaus of a quantum anomalous Hall insulator. We observe a well-defined plateau with zero Hall conductivity over a range of magnetic field around coercivity when the magnetization reverses. The features of the zero Hall plateau are shown to be closely related to that of the quantum anomalous Hall effect, but its temperature evolution exhibits a significant difference from the network model for a conventional quantum Hall plateau transition. We propose that the chiral edge states residing at the magnetic domain boundaries, which are unique to amore » quantum anomalous Hall insulator, are responsible for the novel features of the zero Hall plateau.« less

Charge carrier coherence and Hall effect in organic semiconductors.

PubMed

Yi, H T; Gartstein, Y N; Podzorov, V

2016-03-30

Hall effect measurements are important for elucidating the fundamental charge transport mechanisms and intrinsic mobility in organic semiconductors. However, Hall effect studies frequently reveal an unconventional behavior that cannot be readily explained with the simple band-semiconductor Hall effect model. Here, we develop an analytical model of Hall effect in organic field-effect transistors in a regime of coexisting band and hopping carriers. The model, which is supported by the experiments, is based on a partial Hall voltage compensation effect, occurring because hopping carriers respond to the transverse Hall electric field and drift in the direction opposite to the Lorentz force acting on band carriers. We show that this can lead in particular to an underdeveloped Hall effect observed in organic semiconductors with substantial off-diagonal thermal disorder. Our model captures the main features of Hall effect in a variety of organic semiconductors and provides an analytical description of Hall mobility, carrier density and carrier coherence factor.

5. View of Community Hall, first floor interior, entrance hall ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. View of Community Hall, first floor interior, entrance hall on east side of building, facing southeast. Ticket booth center foreground, stairway to auditorium right foreground. - Community Hall, Rainier Avenue & View Drive, Port Gamble, Kitsap County, WA

ENCOURAGING ELECTRICITY SAVINGS IN A UNIVERSITY RESIDENTIAL HALL THROUGH A COMBINATION OF FEEDBACK, VISUAL PROMPTS, AND INCENTIVES

PubMed Central

Bekker, Marthinus J; Cumming, Tania D; Osborne, Nikola K.P; Bruining, Angela M; McClean, Julia I; Leland, Louis S

2010-01-01

This experiment investigated the combined use of visual prompts, daily feedback, and rewards to reduce electricity consumption in a university residential hall. After a 17-day baseline period, the experimental intervention was introduced in the intervention hall, and no change was made in the control hall. Energy usage decreased in the intervention hall, but energy usage did not change appreciably in the control hall. In the intervention hall, mean daytime and nighttime savings were 16.2% and 10.7%, respectively, compared to savings of 3.8% (day) and 6.5% (night) in the control hall. PMID:21119909

Topological phase transition and evolution of edge states in In-rich InGaN/GaN quantum wells under hydrostatic pressure

NASA Astrophysics Data System (ADS)

Łepkowski, S. P.; Bardyszewski, W.

2017-02-01

Combining the k · p method with the third-order elasticity theory, we perform a theoretical study of the pressure-induced topological phase transition and the pressure evolution of topologically protected edge states in InN/GaN and In-rich InGaN/GaN quantum wells. We show that for a certain range of the quantum well parameters, thanks to a negative band gap pressure coefficient, it is possible to continuously drive the system from the normal insulator state through the topological insulator into the semimetal phase. The critical pressure for the topological phase transition depends not only on the quantum well thickness but also on the width of the Hall bar, which determines the coupling between the edge states localized at the opposite edges. We also find that in narrow Hall bar structures, near the topological phase transition, a significant Rashba-type spin splitting of the lower and upper branches of the edge state dispersion curve appears. This effect originates from the lack of the mirror symmetry of the quantum well potential caused by the built-in electric field, and can be suppressed by increasing the Hall bar width. When the pressure increases, the energy dispersion of the edge states becomes more parabolic-like and the spin splitting decreases. A further increase of pressure leads to the transition to a semimetal phase, which occurs due to the closure of the indirect 2D bulk band gap. The difference between the critical pressure at which the system becomes semimetallic, and the pressure for the topological phase transition, correlates with the variation of the pressure coefficient of the band gap in the normal insulator state.

Topological phase transition and evolution of edge states in In-rich InGaN/GaN quantum wells under hydrostatic pressure.

PubMed

Łepkowski, S P; Bardyszewski, W

2017-02-08

Combining the k · p method with the third-order elasticity theory, we perform a theoretical study of the pressure-induced topological phase transition and the pressure evolution of topologically protected edge states in InN/GaN and In-rich InGaN/GaN quantum wells. We show that for a certain range of the quantum well parameters, thanks to a negative band gap pressure coefficient, it is possible to continuously drive the system from the normal insulator state through the topological insulator into the semimetal phase. The critical pressure for the topological phase transition depends not only on the quantum well thickness but also on the width of the Hall bar, which determines the coupling between the edge states localized at the opposite edges. We also find that in narrow Hall bar structures, near the topological phase transition, a significant Rashba-type spin splitting of the lower and upper branches of the edge state dispersion curve appears. This effect originates from the lack of the mirror symmetry of the quantum well potential caused by the built-in electric field, and can be suppressed by increasing the Hall bar width. When the pressure increases, the energy dispersion of the edge states becomes more parabolic-like and the spin splitting decreases. A further increase of pressure leads to the transition to a semimetal phase, which occurs due to the closure of the indirect 2D bulk band gap. The difference between the critical pressure at which the system becomes semimetallic, and the pressure for the topological phase transition, correlates with the variation of the pressure coefficient of the band gap in the normal insulator state.

Numerical Simulations of the XR-5 Hall Thruster for Life Assessment at Different Operating Conditions

NASA Technical Reports Server (NTRS)

Lopez Ortega, Alejandro; Jorns, Benjamin A.; Mikellides, Ioannis G.; Hofer, Richard R.

2015-01-01

NASA's Jet Propulsion Laboratory has been investigating the applicability of Aerojet Rocketdyne's XR-5 thruster, a 4.5 kW class Hall thruster, for deep-space missions. Major considerations for qualifying the XR-5 for deep-space missions are demonstration of a wide throttling envelope and a usable life capability in excess of 10,000 h. Numerical simulations with the 2-D axisymmetric code Hall2De are employed to inform the qualification process by assessing erosion rates at the thruster surfaces in a wide range of throttling conditions without the need for conducting costly endurance testing. In previous work at JPL by Jorns et al., the anomalous collision frequency distribution for 11 different throttling conditions of the XR-5 spanning 0.3-4.5 kW were identified based on probe measurements of the electron temperature in the near plume region. In this paper, we provide estimates for the erosion rates at the channel walls and pole covers for the same 11 conditions. Uncertainties in the plasma measurements and in the anomalous collision frequency distribution are addressed by determining upper and lower bounds of the erosion rates. Results suggest that erosion of the walls only occurs in the last 5% of the acceleration channel and the rate of such erosion decreases as the geometry of the thruster changes in time due to magnetic shielding. A quasi-zero-erosion state is eventually achieved in all the examined throttling conditions. Examination of the results for pole surface erosion and estimated cathode life indicates that the XR-5 propellant throughput capability will exceed 700 kg, which provides 50% margin over the usable throughput capability of 466 kg as already demonstrated in wear testing.

Charge carrier coherence and Hall effect in organic semiconductors

DOE PAGES

Yi, H. T.; Gartstein, Y. N.; Podzorov, V.

2016-03-30

Hall effect measurements are important for elucidating the fundamental charge transport mechanisms and intrinsic mobility in organic semiconductors. However, Hall effect studies frequently reveal an unconventional behavior that cannot be readily explained with the simple band-semiconductor Hall effect model. Here, we develop an analytical model of Hall effect in organic field-effect transistors in a regime of coexisting band and hopping carriers. The model, which is supported by the experiments, is based on a partial Hall voltage compensation effect, occurring because hopping carriers respond to the transverse Hall electric field and drift in the direction opposite to the Lorentz force actingmore » on band carriers. We show that this can lead in particular to an underdeveloped Hall effect observed in organic semiconductors with substantial off-diagonal thermal disorder. Lastly, our model captures the main features of Hall effect in a variety of organic semiconductors and provides an analytical description of Hall mobility, carrier density and carrier coherence factor.« less

Charge carrier coherence and Hall effect in organic semiconductors

PubMed Central

Yi, H. T.; Gartstein, Y. N.; Podzorov, V.

2016-01-01

Hall effect measurements are important for elucidating the fundamental charge transport mechanisms and intrinsic mobility in organic semiconductors. However, Hall effect studies frequently reveal an unconventional behavior that cannot be readily explained with the simple band-semiconductor Hall effect model. Here, we develop an analytical model of Hall effect in organic field-effect transistors in a regime of coexisting band and hopping carriers. The model, which is supported by the experiments, is based on a partial Hall voltage compensation effect, occurring because hopping carriers respond to the transverse Hall electric field and drift in the direction opposite to the Lorentz force acting on band carriers. We show that this can lead in particular to an underdeveloped Hall effect observed in organic semiconductors with substantial off-diagonal thermal disorder. Our model captures the main features of Hall effect in a variety of organic semiconductors and provides an analytical description of Hall mobility, carrier density and carrier coherence factor. PMID:27025354

Preliminary Study of Arcjet Neutralization of Hall Thruster Clusters (Postprint)

DTIC Science & Technology

2007-01-18

Clustered Hall thrusters have emerged as a favored choice for extending Hall thruster options to very high powers (50 kW - 150 kW). This paper...examines the possible use of an arcjet to neutralize clustered Hall thrusters, as the hybrid arcjet- Hall thruster concept can fill a performance niche...and helium, and then demonstrate the first successful operation of a low power Hall thruster -arcjet neutralizer package. In the surrogate anode studies

Development Status of the Helicon Hall Thruster

DTIC Science & Technology

2009-09-15

Hall thruster , the Helicon Hall Thruster , is presented. The Helicon Hall Thruster combines the efficient ionization mechanism of a helicon source with the favorable plasma acceleration properties of a Hall thruster . Conventional Hall thrusters rely on direct current electron bombardment to ionize the flow in order to generate thrust. Electron bombardment typically results in an ionization cost that can be on the order of ten times the ionization potential, leading to reduced efficiency, particularly at low

Measured Early Lateral Energy Fractions in Concert Halls and Opera Houses

NASA Astrophysics Data System (ADS)

BARRON, M.

2000-04-01

In the 30 years since early lateral reflections were first suggested as important for concert halls, spatial impression and source broadening have become almost universally accepted as essential characteristics of halls with good acoustics. Two objective measures of source broadening have been proposed. Measured values of the best defined of these measures, the early lateral energy fraction (LF), are considered here. Results from two independent measurement surveys are discussed. Comparisons of LF values by hall show a significant link between hall mean LF and hall width. There is however considerable overlap between measured LF values in different halls so the relevance of describing halls by their mean early lateral energy fraction values is questionable. The behaviour of LF values within auditoria is discussed for different concert hall plan forms and within opera houses. A measure of source broadening including sound level is proposed and results considered in the context of auditorium design.

The Merits of the Continued Instruction of ADA as a First Language at the Naval Postgraduate School

DTIC Science & Technology

1994-09-01

H., Ada as a Second Language, McGraw Hill Book Company, 1986. Deitel , H.M. and Deitel P.J., C+ + How to Program , Prentice Hatl, 1994. Fastrack...complex language whose success is dependent on its users knowing how to utilize all of its features to yield good programs . (Fastrack) The addition of...Ada in particular as the first programming language at the Naval Postgraduate School The catch-22 of industry’s dedication to C++ and the Department

Design and Implementation of a Personnel Database System for Indonesian Naval Officers.

DTIC Science & Technology

1986-06-01

CONTINU2" SET CONSOLE OFF WAIT SET CONSOLE ON SET PRINT OFF ENDIF EN DDC ERASE ENDDO ERASE RCTU RN 117 LIST OF REFERENCES 1. Mabee TNI-AL, Sistem Personil...1977. 4. Gorman Michael M., Managing .. Data Base For Critical Factors, 1984 QED Information Sciences, Inc. 5. Martin James ., Yffem Des-- ..ign From...and Carry D. Thorp, Jr., Ptryonel UI~mg~gng~nr:Bmf~..~rmf3.Petrocli. Books, Inc, 1978. 7. Martin James ., 2als fEafflg, Prentice-Mall,. Inc., Englevood

A Decision Support System for Planning, Control and Auditing of DoD Software Cost Estimation.

DTIC Science & Technology

1986-03-01

is frequently used in U. S. Air Force software cost estimates. Barry Boehm’s Constructive Cost Estimation Model (COCOMO) was recently selected for use...are considered basic to the proper development of software. Pressman , [Ref. 11], addresses these basic elements in a manner which attempts to integrate...H., Jr., and Carlson, Eric D., Building E fective Decision SUDDOrt Systems, Prentice-Hal, EnglewoodNJ, 1982 11. Pressman , Roger S., o A Practioner’s A

Measurement of the residual energy of muons in the Gran Sasso underground laboratories

NASA Astrophysics Data System (ADS)

MACRO Collaboration; Ambrosio, M.; Antolini, R.; Baldini, A.; Barbarino, G. C.; Barish, B. C.; Battistoni, G.; Becherini, Y.; Bellotti, R.; Bemporad, C.; Bernardini, P.; Bilokon, H.; Bower, C.; Brigida, M.; Bussino, S.; Cafagna, F.; Calicchio, M.; Campana, D.; Carboni, M.; Caruso, R.; Cecchini, S.; Cei, F.; Chiarella, V.; Choudhary, B. C.; Coutu, S.; Cozzi, M.; de Cataldo, G.; Dekhissi, H.; de Marzo, C.; de Mitri, I.; Derkaoui, J.; de Vincenzi, M.; di Credico, A.; Erriquez, O.; Favuzzi, C.; Forti, C.; Fusco, P.; Giacomelli, G.; Giannini, G.; Giglietto, N.; Giorgini, M.; Grassi, M.; Grillo, A.; Guarino, F.; Gustavino, C.; Habig, A.; Hanson, K.; Heinz, R.; Iarocci, E.; Katsavounidis, E.; Katsavounidis, I.; Kearns, E.; Kim, H.; Kyriazopoulou, S.; Lamanna, E.; Lane, C.; Levin, D. S.; Lipari, P.; Longley, N. P.; Longo, M. J.; Loparco, F.; Mancarella, G.; Mandrioli, G.; Margiotta, A.; Marini, A.; Martello, D.; Marzari-Chiesa, A.; Mazziotta, M. N.; Michael, D. G.; Monacelli, P.; Montaruli, T.; Monteno, M.; Mufson, S.; Musser, J.; Nicolò, D.; Nolty, R.; Orth, C.; Osteria, G.; Palamara, O.; Patera, V.; Patrizii, L.; Pazzi, R.; Peck, C. W.; Perrone, L.; Petrera, S.; Pistilli, P.; Popa, V.; Rainò, A.; Reynoldson, J.; Ronga, F.; Satriano, C.; Scapparone, E.; Scholberg, K.; Sciubba, A.; Serra, P.; Sioli, M.; Sirri, G.; Sitta, M.; Spinelli, P.; Spinetti, M.; Spurio, M.; Steinberg, R.; Stone, J. L.; Sulak, L. R.; Surdo, A.; Tarlè, G.; Vakili, M.; Walter, C. W.; Webb, R.

2003-06-01

The MACRO detector was located in the Hall B of the Gran Sasso underground laboratories under an average rock overburden of 3700 hg/cm2. A transition radiation detector composed of three identical modules, covering a total horizontal area of 36 m2, was installed inside the empty upper part of the detector in order to measure the residual energy of muons. This paper presents the measurement of the residual energy of single and double muons crossing the apparatus. Our data show that double muons are more energetic than single ones. This measurement is performed over a standard rock depth range from 3000 to 6500 hg/cm2.

The association between handwashing practices and illness symptoms among college students living in a university dormitory.

PubMed

Thumma, Jyothi; Aiello, Allison E; Foxman, Betsy

2009-02-01

We describe handwashing practices, the association of handwashing with upper respiratory and gastrointestinal symptoms, and the effects of gender on handwashing practices among male (n = 215) and female (n = 243) college students. Self-reported frequency of handwashing was not associated with infectious illness symptom reporting. Only a small proportion of males (10%) and females (7%) reported "always" washing their hands before eating. Females were more likely than males to always wash their hands after urinating (69% vs 43%; P < .0001) and after a bowel movement (84% vs 78%; P = .14). Identifying new strategies to increase handwashing may help prevent infectious disease transmission in residence hall environments.

Observation of anomalous Hall effect in a non-magnetic two-dimensional electron system

PubMed Central

Maryenko, D.; Mishchenko, A. S.; Bahramy, M. S.; Ernst, A.; Falson, J.; Kozuka, Y.; Tsukazaki, A.; Nagaosa, N.; Kawasaki, M.

2017-01-01

Anomalous Hall effect, a manifestation of Hall effect occurring in systems without time-reversal symmetry, has been mostly observed in ferromagnetically ordered materials. However, its realization in high-mobility two-dimensional electron system remains elusive, as the incorporation of magnetic moments deteriorates the device performance compared to non-doped structure. Here we observe systematic emergence of anomalous Hall effect in various MgZnO/ZnO heterostructures that exhibit quantum Hall effect. At low temperatures, our nominally non-magnetic heterostructures display an anomalous Hall effect response similar to that of a clean ferromagnetic metal, while keeping a large anomalous Hall effect angle θAHE≈20°. Such a behaviour is consistent with Giovannini–Kondo model in which the anomalous Hall effect arises from the skew scattering of electrons by localized paramagnetic centres. Our study unveils a new aspect of many-body interactions in two-dimensional electron systems and shows how the anomalous Hall effect can emerge in a non-magnetic system. PMID:28300133

5. ROOFTOPS, ISHERWOOD HALL (BUILDING NO. 104), GRIFFIN (BUILDING NO. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. ROOFTOPS, ISHERWOOD HALL (BUILDING NO. 104), GRIFFIN (BUILDING NO. 110), MELVILLE HALL (BUILDING NO. 116) LOOKING WEST FROM CLOCK TOWER OF MAHAN HALL - U.S. Naval Academy, Annapolis, Anne Arundel County, MD

ION ACOUSTIC TURBULENCE, ANOMALOUS TRANSPORT, AND SYSTEM DYNAMICS IN HALL EFFECT THRUSTERS

DTIC Science & Technology

2017-06-30

17394 4 / 13 HALL EFFECT THRUSTERS Hall Effect Thrusters (HET): Traditionally Modeled in R-Z Named for Hall Current in θ Uses Quasi -1D Electron Fluid...HET): Traditionally Modeled in R-Z Named for Hall Current in θ Uses Quasi -1D Electron Fluid Solve Ohm’s Law→ No e−-momentum Zθ Unrolled to YZ...Current in θ Uses Quasi -1D Electron Fluid Solve Ohm’s Law→ No e−-momentum Zθ Unrolled to YZ Electron ExB Drift Unmagnetized Ions Results in Hall Current

NASA's 2004 Hall Thruster Program

NASA Technical Reports Server (NTRS)

Jacobson, David T.; Manzella, David H.; Hofer, Richard R.; Peterson, Peter Y.

2004-01-01

An overview of NASA's Hall thruster research and development tasks conducted during fiscal year 2004 is presented. These tasks focus on: raising the technology readiness level of high power Hall thrusters, developing a moderate-power/ moderate specific impulse Hall thruster, demonstrating high-power/high specific impulse Hall thruster operation, and addressing the fundamental technical challenges of emerging Hall thruster concepts. Programmatic background information, technical accomplishments and out year plans for each program element performed under the sponsorship of the In-Space Transportation Program, Project Prometheus, and the Energetics Project are provided.

Clinical Relevance of Alternative Endpoints in Colorectal Cancer First-Line Therapy With Bevacizumab: A Retrospective Study.

PubMed

Turpin, Anthony; Paget-Bailly, Sophie; Ploquin, Anne; Hollebecque, Antoine; Peugniez, Charlotte; El-Hajbi, Farid; Bonnetain, Franck; Hebbar, Mohamed

2018-03-01

We studied the relationship between intermediate criteria and overall survival (OS) in metastatic colorectal cancer (mCRC) patients who received first-line chemotherapy with bevacizumab. We assessed OS, progression-free survival (PFS), duration of disease control (DDC), the sum of the periods in which the disease did not progress, and the time to failure of strategy (TFS), which was defined as the entire period before the introduction of a second-line treatment. Linear correlation and regression models were used, and Prentice criteria were investigated. With a median follow-up of 57.6 months for 216 patients, the median OS was 24.5 months (95% confidence interval [CI], 21.3-29.7). The median PFS, DDC, and TFS were 8.9 (95% CI, 8.4-9.7), 11.0 (95% CI, 9.8-12.4), and 11.1 (95% CI, 10.0-13.0) months, respectively. The correlations between OS and DDC (Pearson coefficient, 0.79 [95% CI, 0.73-0.83], determination coefficient, 0.62) and OS and TFS (Pearson coefficient, 0.79 [95% CI, 0.73-0.84], determination coefficient, 0.63) were satisfactory. Linear regression analysis showed a significant association between OS and DDC, and between OS and TFS. Prentice criteria were verified for TFS as well as DDC. DDC and TFS correlated with OS and are relevant as intermediate criteria in the setting of patients with mCRC treated with a first-line bevacizumab-based regimen. Copyright © 2017 Elsevier Inc. All rights reserved.

A Monolithic CMOS Magnetic Hall Sensor with High Sensitivity and Linearity Characteristics

PubMed Central

Huang, Haiyun; Wang, Dejun; Xu, Yue

2015-01-01

This paper presents a fully integrated linear Hall sensor by means of 0.8 μm high voltage complementary metal-oxide semiconductor (CMOS) technology. This monolithic Hall sensor chip features a highly sensitive horizontal switched Hall plate and an efficient signal conditioner using dynamic offset cancellation technique. An improved cross-like Hall plate achieves high magnetic sensitivity and low offset. A new spinning current modulator stabilizes the quiescent output voltage and improves the reliability of the signal conditioner. The tested results show that at the 5 V supply voltage, the maximum Hall output voltage of the monolithic Hall sensor microsystem, is up to ±2.1 V and the linearity of Hall output voltage is higher than 99% in the magnetic flux density range from ±5 mT to ±175 mT. The output equivalent residual offset is 0.48 mT and the static power consumption is 20 mW. PMID:26516864

A Monolithic CMOS Magnetic Hall Sensor with High Sensitivity and Linearity Characteristics.

PubMed

Huang, Haiyun; Wang, Dejun; Xu, Yue

2015-10-27

This paper presents a fully integrated linear Hall sensor by means of 0.8 μm high voltage complementary metal-oxide semiconductor (CMOS) technology. This monolithic Hall sensor chip features a highly sensitive horizontal switched Hall plate and an efficient signal conditioner using dynamic offset cancellation technique. An improved cross-like Hall plate achieves high magnetic sensitivity and low offset. A new spinning current modulator stabilizes the quiescent output voltage and improves the reliability of the signal conditioner. The tested results show that at the 5 V supply voltage, the maximum Hall output voltage of the monolithic Hall sensor microsystem, is up to ±2.1 V and the linearity of Hall output voltage is higher than 99% in the magnetic flux density range from ±5 mT to ±175 mT. The output equivalent residual offset is 0.48 mT and the static power consumption is 20 mW.

Hall effect of copper nitride thin films

NASA Astrophysics Data System (ADS)

Yue, G. H.; Liu, J. Z.; Li, M.; Yuan, X. M.; Yan, P. X.; Liu, J. L.

2005-08-01

The Hall effect of copper nitride (Cu3N) thin films was investigated in our work. Cu3N films were deposited on glass substrates by radio-frequency (RF) magnetron sputtering at different temperatures using pure copper as the sputtering target. The Hall coefficients of the films are demonstrated to be dependent on the deposition gas flow rate and the measuring temperature. Both the Hall coefficient and resistance of the Cu3N films increase with the nitrogen gas flow rate at room temperature, while the Hall mobility and the carrier density of the films decrease. As the temperature changed from 100 K to 300 K, the Hall coefficient and the resistivity of the films decreased, while the carrier density increased and Hall mobility shows no great change. The energy band gap of the Cu3N films deduced from the curve of the common logarithm of the Hall coefficient against 1/T is 1.17-1.31 eV.

27. FIRST FLOOR CENTRAL HALL, EAST WALL, DETAIL OF ENTABLATURE ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

27. FIRST FLOOR CENTRAL HALL, EAST WALL, DETAIL OF ENTABLATURE SHOWING EGG AND DART OVOLO AND GUTTAE OF THE THIRD MUTULE FROM THE SOUTHEAST CORNER - Independence Hall Complex, Independence Hall, 500 Chestnut Street, Philadelphia, Philadelphia County, PA

Nondestructive hall coefficient measurements using ACPD techniques

NASA Astrophysics Data System (ADS)

Velicheti, Dheeraj; Nagy, Peter B.; Hassan, Waled

2018-04-01

Hall coefficient measurements offer great opportunities as well as major challenges for nondestructive materials characterization. The Hall effect is produced by the magnetic Lorentz force acting on moving charge carriers in the presence of an applied magnetic field. The magnetic perturbation gives rise to a Hall current that is normal to the conduction current but does not directly perturb the electric potential distribution. Therefore, Hall coefficient measurements usually exploit the so-called transverse galvanomagnetic potential drop effect that arises when the Hall current is intercepted by the boundaries of the specimen and thereby produce a measurable potential drop. In contrast, no Hall potential is produced in a large plate in the presence of a uniform normal field at quasi-static low frequencies. In other words, conventional Hall coefficient measurements are inherently destructive since they require cutting the material under tests. This study investigated the feasibility of using alternating current potential drop (ACPD) techniques for nondestructive Hall coefficient measurements in plates. Specifically, the directional four-point square-electrode configuration is investigated with superimposed external magnetic field. Two methods are suggested to make Hall coefficient measurements in large plates without destructive machining. At low frequencies, constraining the bias magnetic field can replace constraining the dimensions of the specimen, which is inherently destructive. For example, when a cylindrical permanent magnet is used to provide the bias magnetic field, the peak Hall voltage is produced when the diameter of the magnet is equal to the diagonal of the square ACPD probe. Although this method is less effective than cutting the specimen to a finite size, the loss of sensitivity is less than one order of magnitude even at very low frequencies. In contrast, at sufficiently high inspection frequencies the magnetic field of the Hall current induces a strong enough Hall electric field that produces measurable potential differences between points lying on the path followed by the Hall current even when it is not intercepted by either the edge of the specimen or the edge of the magnetic field. The induced Hall voltage increases proportionally to the square root of frequency as the current is squeezed into a shallow electromagnetic skin of decreasing depth. This approach could be exploited to measure the Hall coefficient near the surface at high frequencies without cutting the specimen.

Fundamental piezo-Hall coefficients of single crystal p-type 3C-SiC for arbitrary crystallographic orientation

NASA Astrophysics Data System (ADS)

Qamar, Afzaal; Dao, Dzung Viet; Phan, Hoang-Phuong; Dinh, Toan; Dimitrijev, Sima

2016-08-01

Piezo-Hall effect in a single crystal p-type 3C-SiC, grown by LPCVD process, has been characterized for various crystallographic orientations. The quantified values of the piezo-Hall effect in heavily doped p-type 3C-SiC(100) and 3C-SiC(111) for different crystallographic orientations were used to obtain the fundamental piezo-Hall coefficients, P 12 = ( 5.3 ± 0.4 ) × 10 - 11 Pa - 1 , P 11 = ( - 2.6 ± 0.6 ) × 10 - 11 Pa - 1 , and P 44 = ( 11.42 ± 0.6 ) × 10 - 11 Pa - 1 . Unlike the piezoresistive effect, the piezo-Hall effect for (100) and (111) planes is found to be independent of the angle of rotation of the device within the crystal plane. The values of fundamental piezo-Hall coefficients obtained in this study can be used to predict the piezo-Hall coefficients in any crystal orientation which is very important for designing of 3C-SiC Hall sensors to minimize the piezo-Hall effect for stable magnetic field sensitivity.

Hole mobilities and the effective Hall factor in p-type GaAs

NASA Astrophysics Data System (ADS)

Wenzel, M.; Irmer, G.; Monecke, J.; Siegel, W.

1997-06-01

We prove the effective Hall factor in p-GaAs to be larger than values discussed in the literature up to now. The scattering rates for the relevant scattering mechanisms in p-GaAs have been recalculated after critical testing the existing models. These calculations allow to deduce theoretical drift and theoretical Hall mobilities as functions of temperature which can be compared with measured data. Theoretical Hall factors in the heavy and light hole bands and an effective Hall factor result. The calculated room temperature values of the drift mobility and of the effective Hall factor are 118 cm2/V s and 3.6, respectively. The fitted acoustic deformation potential E1=7.9 eV and the fitted optical coupling constant DK=1.24×1011 eV/m are close to values published before. It is shown that the measured strong dependence of the Hall mobility on the Hall concentration is not mainly caused by scattering by ionized impurities but by the dependence of the effective Hall factor on the hole concentration.

The first vineyard concert hall in North America

NASA Astrophysics Data System (ADS)

Jaffe, Christopher; Rivera, Carlos

2002-11-01

The first vineyard or surround concert hall designed and built in the Western Hemisphere is the Sala Nezahualcoyotl in Mexico City. The Hall was completed in 1976 and is part of the Cultural Center at the Universidad Nacional Autonoma de Mexico. The hall was named after a Toltec poet, architect, and musician who lived in the 15th century and was the Renaissance man of his day. In order to provide the familiar traditional sound of the rectangular (shoebox) European Hall, the acoustic designers set the criteria for reverberation times through the frequency spectrum and the Initial Time Delay Gap at every seat in the house to match the measurements taken at the Grosser Musik vereinssaal in Vienna and Boston Symphony Hall. In this paper we discuss the techniques used to create the traditional sound in a vineyard hall and the reaction of musicians and audiences to the completed facility. The Sala was the model for Suntory Hall in Japan which in turn spawned a number of vineyard halls in Japan. Most recently, the vineyard style seems to be appealing to more and more symphonic organizations in Europe and North America.

Enhanced spin Hall ratios by Al and Hf impurities in Pt thin films

NASA Astrophysics Data System (ADS)

Nguyen, Minh-Hai; Zhao, Mengnan; Ralph, Daniel C.; Buhrman, Robert A.

The spin Hall effect (SHE) in Pt has been reported to be strong and hence promising for spintronic applications. In the intrinsic SHE mechanism, which has been shown to be dominant in Pt, the spin Hall conductivity σSH is constant, dependent only on the band structure of the spin Hall material. The spin Hall ratio θSH =σSH . ρ , on the other hand, should be proportional to the electrical resistivity ρ of the spin Hall layer. This suggests the possibility of enhancing the spin Hall ratio by introducing additional diffusive scattering to increase the electrical resistivity of the spin Hall layer. Our previous work has shown that this could be done by increasing the surface scattering by growing thinner Pt films in contact with higher resistivity materials such as Ta. In this talk, we discuss another approach: to introduce impurities of metals with negligible spin orbit torque into the Pt film. Our PtAl and PtHf alloy samples exhibit strong enhancement of the spin Hall torque efficiency with impurity concentration due to increased electrical resistivity. Supported in part by Samsung Electronics.

Synchronization of spin-transfer torque oscillators by spin pumping, inverse spin Hall, and spin Hall effects

DOE Office of Scientific and Technical Information (OSTI.GOV)

Elyasi, Mehrdad; Bhatia, Charanjit S.; Yang, Hyunsoo, E-mail: eleyang@nus.edu.sg

2015-02-14

We have proposed a method to synchronize multiple spin-transfer torque oscillators based on spin pumping, inverse spin Hall, and spin Hall effects. The proposed oscillator system consists of a series of nano-magnets in junction with a normal metal with high spin-orbit coupling, and an accumulative feedback loop. We conduct simulations to demonstrate the effect of modulated charge currents in the normal metal due to spin pumping from each nano-magnet. We show that the interplay between the spin Hall effect and inverse spin Hall effect results in synchronization of the nano-magnets.

Nonlinearity in the effect of an inhomogeneous Hall angle

NASA Astrophysics Data System (ADS)

Koon, Daniel W.

2007-03-01

The differential equation for the electric potential in a conducting material with an inhomogeneous Hall angle is extended to the large-field limit. This equation is solved for a square specimen, using a successive over-relaxation [SOR] technique for matrices of up to 101x101 size, and the Hall weighting function -- the effect of local pointlike perturbations on the measured Hall angle -- is calculated as both the unperturbed Hall angle, θH, and the perturbation, δθH, exceed the linear, small angle limit. Preliminary results show that the Hall angle varies by no more than 5% if both | θH |<1 and | δθH |<1. Thus, previously calculated results for the Hall weighting function can be used for most materials in all but the most extreme magnetic fields.

Rule-based fault diagnosis of hall sensors and fault-tolerant control of PMSM

NASA Astrophysics Data System (ADS)

Song, Ziyou; Li, Jianqiu; Ouyang, Minggao; Gu, Jing; Feng, Xuning; Lu, Dongbin

2013-07-01

Hall sensor is widely used for estimating rotor phase of permanent magnet synchronous motor(PMSM). And rotor position is an essential parameter of PMSM control algorithm, hence it is very dangerous if Hall senor faults occur. But there is scarcely any research focusing on fault diagnosis and fault-tolerant control of Hall sensor used in PMSM. From this standpoint, the Hall sensor faults which may occur during the PMSM operating are theoretically analyzed. According to the analysis results, the fault diagnosis algorithm of Hall sensor, which is based on three rules, is proposed to classify the fault phenomena accurately. The rotor phase estimation algorithms, based on one or two Hall sensor(s), are initialized to engender the fault-tolerant control algorithm. The fault diagnosis algorithm can detect 60 Hall fault phenomena in total as well as all detections can be fulfilled in 1/138 rotor rotation period. The fault-tolerant control algorithm can achieve a smooth torque production which means the same control effect as normal control mode (with three Hall sensors). Finally, the PMSM bench test verifies the accuracy and rapidity of fault diagnosis and fault-tolerant control strategies. The fault diagnosis algorithm can detect all Hall sensor faults promptly and fault-tolerant control algorithm allows the PMSM to face failure conditions of one or two Hall sensor(s). In addition, the transitions between health-control and fault-tolerant control conditions are smooth without any additional noise and harshness. Proposed algorithms can deal with the Hall sensor faults of PMSM in real applications, and can be provided to realize the fault diagnosis and fault-tolerant control of PMSM.

Piezo-Hall effect and fundamental piezo-Hall coefficients of single crystal n-type 3C-SiC(100) with low carrier concentration

NASA Astrophysics Data System (ADS)

Qamar, Afzaal; Dao, Dzung Viet; Dinh, Toan; Iacopi, Alan; Walker, Glenn; Phan, Hoang-Phuong; Hold, Leonie; Dimitrijev, Sima

2017-04-01

This article reports the results on the piezo-Hall effect in single crystal n-type 3C-SiC(100) having a low carrier concentration. The effect of the crystallographic orientation on the piezo-Hall effect has been investigated by applying stress to the Hall devices fabricated in different crystallographic directions. Single crystal n-type 3C-SiC(100) and 3C-SiC(111) were grown by low pressure chemical vapor deposition at 1250 °C. Fundamental piezo-Hall coefficients were obtained using the piezo-Hall effect measurements as P11 = (-29 ± 1.3) × 10-11 Pa-1, P12 = (11.06 ± 0.5)× 10-11 Pa-1, and P44 = (-3.4 ± 0.7) × 10-11 Pa-1. It has been observed that the piezo-Hall coefficients of n-type 3C-SiC(100) show a completely different behavior as compared to that of p-type 3C-SiC.

Magneto-transport of an electron bilayer system in an undoped Si/SiGe double-quantum-well heterostructure

DOE PAGES

Laroche, Dominique; Huang, ShiHsien; Nielsen, Erik; ...

2015-04-08

We report the design, the fabrication, and the magneto-transport study of an electron bilayer system embedded in an undoped Si/SiGe double-quantum-well heterostructure. Additionally, the combined Hall densities (n Hall ) ranging from 2.6 × 10 10 cm -2 to 2.7 × 10 11 cm -2 were achieved, yielding a maximal combined Hall mobility (μ Hall ) of 7.7 × 10 5 cm 2/(V • s) at the highest density. Simultaneous electron population of both quantum wells is clearly observed through a Hall mobility drop as the Hall density is increased to n Hall > 3.3 × 10 10 cm -2,more » consistent with Schrödinger-Poisson simulations. Furthermore, the integer and fractional quantum Hall effects are observed in the device, and single-layer behavior is observed when both layers have comparable densities, either due to spontaneous interlayer coherence or to the symmetric-antisymmetric gap.« less

Anomalous Hall effect in calcium-doped lanthanum cobaltite and gadolinium

NASA Astrophysics Data System (ADS)

Baily, Scott Alan

The physical origin of the anomalous (proportional to magnetization) Hall effect is not very well understood. While many theories account for a Hall effect proportional to the magnetization of a material, these theories often predict effects significantly smaller than those found in ferromagnetic materials. An even more significant deficiency of the conventional theories is that they predict an anomalous Hall resistivity that is proportional to a power of the resistivity, and in the absence of a metal insulator transition cannot account for the anomalous Hall effect that peaks near TC. Recent models based on a geometric, or Berry, phase have had a great deal of success describing the anomalous Hall effect in double-exchange systems (e.g., lanthanum manganite and chromium dioxide). In gadolinium, as in double-exchange magnets, the exchange interaction is mediated by the conduction electrons and the anomalous Hall effect may therefore resemble that of CrO2 and other metallic double-exchange ferromagnets. Lanthanum cobaltite is similar to manganite in many ways, but a strong double-exchange interaction is not present. Calcium-doped lanthanum cobaltite films were found to have the largest anomalous Hall effect of any ferromagnetic metal. The primary purpose of this study is to gain insight into the origin of the anomalous Hall effect with the hope that these theories can be extended to account for the effect in other materials. The Hall resistivity, magnetoresistance, and magnetization of a Gadolinium single crystal were measured in fields up to 30 T. Cobaltite films were grown via laser ablation and characterized by a variety of techniques. Hall resistivity, magnetoresistance, magnetization, and magnetothermopower of L 1-xCaxCoO3 samples with 0.15 < x < 0.4 were measured in fields up to 7 T. The Gd results suggest that Berry's phase contributes partially to the Hall effect near TC. Berry's phase theories hold promise for explaining the large anomalous Hall effect in La1-xCaxCoO3 near T C, but the material presents many additional complexities, including a unique low temperature magnetoresistance. At low temperature, the Hall effect may be best explained by spin-polarized carriers scattering off of orbital disorder in spin-ordered clusters.

Valley-chiral quantum Hall state in graphene superlattice structure

NASA Astrophysics Data System (ADS)

Tian, H. Y.; Tao, W. W.; Wang, J.; Cui, Y. H.; Xu, N.; Huang, B. B.; Luo, G. X.; Hao, Y. H.

2016-05-01

We theoretically investigate the quantum Hall effect in a graphene superlattice (GS) system, in which the two valleys of graphene are coupled together. In the presence of a perpendicular magnetic field, an ordinary quantum Hall effect is found with the sequence σxy=ν e^2/h(ν=0,+/-1,+/-2,\\cdots) . At the zeroth Hall platform, a valley-chiral Hall state stemming from the single K or K' valley is found and it is localized only on one sample boundary contributing to the longitudinal conductance but not to the Hall conductivity. Our findings may shed light on the graphene-based valleytronics applications.

The Role of Leadership in Navy Program Offices. Executive Summary

DTIC Science & Technology

1973-05-01

PROGRAM MANAGEMENT COURSE- SSTUDENT STUDY PROGRAM Fort Beivoir, Virginia, 22060 THE ROLE OF LEADERSHIP IN NAVY PROGRAM OFFICES STUDY REPORT PMC 73-1...jLa I1 • 1. Men at the Top. Osborne kLliott 1 2. "Understanding Leadership ". W. 0. H. Prentice, HBR Sep- Oct 1966 j 3. "A Theory of Human Motivation...Drucker, IMI reprint 9. Technical Management Institute Thifnkpiece, " Leadership " 1 • 0. "The Effective Manager ". Peter Drucker, LMI r~print 11. Sur-ival In

Topological Hall Effect in Skyrmions: A Nonequilibrium Coherent Transport Approach

NASA Astrophysics Data System (ADS)

Yin, Gen; Zang, Jiadong; Lake, Roger

2014-03-01

Skyrmion is a topological spin texture recently observed in many materials with broken inversion symmetry. In experiments, one effective method to detect the skyrmion crystal phase is the topological Hall measurement. At adiabatic approximation, previous theoretical studies show that the Hall signal is provided by an emergent magnetic field, which explains the topological Hall effect in the classical level. Motivated by the potential device application of skyrmions as digital bits, it is important to understand the topological Hall effect in the mesoscopic level, where the electron coherence should be considered. In this talk, we will discuss the quantum aspects of the topological Hall effect on a tight binding setup solved by nonequilibrium Green's function (NEGF). The charge distribution, Hall potential distribution, thermal broadening effect and the Hall resistivity are investigated in detail. The relation between the Hall resistance and the DM interaction is investigated. Driven by the spin transferred torque (SST), Skyrmion dynamics is previously studied within the adiabatic approximation. At the quantum transport level, this talk will also discuss the non-adiabatic effect in the skyrmion motion with the presence of the topological Hall effect. This material is based upon work supported by the National Science Foundation under Grant Nos. NSF 1128304 and NSF 1124733. It was also supported in part by FAME, one of six centers of STARnet, an SRC program sponsored by MARCO and DARPA.

MacMS: A Mass Spectrometer Simulator: Abstract of Issue 9906M

NASA Astrophysics Data System (ADS)

Bigger, Stephen W.; Craig, Robert A.

1999-10-01

MacMS is a program for Mac-OS compatible computers that simulates a magnetic sector mass spectrometer (1-4) designed to operate in the mass-to-charge (m/z) ratio range of 1-200 amu. MacMS has two operational modules. The first module (see Figure 1) is called the "Path" module and enables the user to quantitatively examine the trajectory of an ion of given m/z ratio in the electric and magnetic fields of the simulated "instrument". By systematically measuring a series of trajectories of different ions under different electric and magnetic field conditions, the user can determine how the resolution of the "instrument" is affected by these experimentally variable parameters. The user can thus choose suitable instrumental conditions for scanning a given m/z ratio range with good separation between the peaks. The second module (see Figure 2) is called as the "Spectrometer" module and enables the user to record, under any chosen instrumental conditions, the mass spectrum of (i) the instrumental background, (ii) neon, (iii) methane, or (iv) the parent ion of carbon tetrachloride. Both voltage scanning and magnetic scanning are possible (5). A hard copy of any mass spectrum that has been recorded can also be obtained. MacMS can read ASCII data files containing mass spectral information of compounds other than those that are "built-in" to the simulator. The appropriate format for creating such data files is described in the program documentation. There are a number of instructional exercises that can be conducted using the mass spectral information contained within the simulator. These are included in the program documentation. For example, the intensities of the 20Ne+, 21Ne+, and 22Ne+ species can be determined from hard copies of mass spectra of neon that are obtained under different instrumental sensitivities. The relative abundances of the three isotopes of neon can thus be calculated and compared with the literature values (6). The simulator also includes adjustable, fixed-value range and gain settings, which can be used to enhance the resolution and sensitivity of the instrument respectively.

1. Kiser, R. N. Introduction to Mass Spectrometry and its Applications; Prentice-Hall: Englewood Cliffs, N. J., 1965; pp 1-3; pp 32-65.
2. Johnstone, R. A. W.; Rose, M. E. Mass Spectrometry for Chemists and Biochemists, 2nd ed.; Cambridge University Press: Cambridge, 1996.
3. Hill, H. C.; Loudon, A. G. Introduction to Mass Spectrometry; 2nd ed.; Heyden: London, 1972; p 5.
4. Farmer, J. B. In Mass Spectrometry, McDowell, C. A., Ed.; McGraw-Hill: New York, 1963; pp 10-11.
5. Message, G. M. Practical Aspects of Gas Chromatography-Mass Spectrometry, Wiley: New York, 1984; Chapter 3.
6. CRC Handbook of Chemistry and Physics, 55th ed.; CRC: Cleveland, 1974.

Concert hall acoustics

NASA Astrophysics Data System (ADS)

Schroeder, Manfred

2004-05-01

I will review some work at Bell Laboratories on artificial reverberation and concert hall acoustics including Philharmonic Hall (Lincoln Center for the Performing Arts, New York). I will also touch on sound diffusion by number-theoretic surfaces and the measurement of reverberation time using the music as played in the hall as a ``test'' signal.

A Behavioral Weight Control Program for Residence Hall Students.

ERIC Educational Resources Information Center

Domke, Jane A.; And Others

1981-01-01

Compared a weight control treatment specifically tailored to the needs of residence hall students with a standardized behavioral procedure. Although posttreatment results indicated a very slight and nonsignificant advantage for the residence hall condition, this was not true at follow-up. Suggests the residence hall procedure may be overly…

78 FR 58338 - Proposed Flood Hazard Determinations

Federal Register 2010, 2011, 2012, 2013, 2014

2013-09-23

.../preliminaryfloodhazarddata preliminaryfloodhazarddata City of Crystal River City Hall, 123 NW U.S. Highway 19, Crystal River.../preliminaryfloodhazarddata preliminaryfloodhazarddata City of Carbon Hill City Hall, 170 NW 2nd Avenue, Carbon Hill, AL 35549. City of Cordova City Hall, 74 Main Street, Cordova, AL 35550. City of Dora City Hall, 1485 Sharon...

75 FR 22770 - Gary E. Hall and Rita Hall; Notice of Availability of Environmental Assessment

Federal Register 2010, 2011, 2012, 2013, 2014

2010-04-30

... DEPARTMENT OF ENERGY Federal Energy Regulatory Commission [Project No. 13652-000-Montana] Gary E. Hall and Rita Hall; Notice of Availability of Environmental Assessment April 22, 2010. In accordance with the National Environmental Policy Act of 1969, as amended, and the Federal Energy Regulatory...

Facility Focus: Residence Halls.

ERIC Educational Resources Information Center

College Planning & Management, 2002

2002-01-01

Describes residence halls seeking to meet needs beyond traditional mass housing for the 18- to 22-year-old students: Whittemore Hall at the Tuck School of Business at Dartmouth College (for older students); Small Group Housing at Washington University (grouping students with common interests); and the renovation of the residence hall at Boston's…

Upper Campanian calciclastic turbidite sequences from the Hacımehmet area (eastern Pontides, NE Turkey): integrated biostratigraphy and microfacies analysis

NASA Astrophysics Data System (ADS)

Sari, Bilal; Kandemir, Raif; Özer, Sacit; Walaszczyk, Ireneusz; Görmüş, Muhittin; Demircan, Huriye; Yilmaz, Cemil

2014-12-01

The upper Campanian (Cretaceous) of the Hacımehmet area (south of the city of Trabzon; Eastern Pontides) is mainly composed of calciclastic turbidites. The basinal unit of the 119 m thick succession includes thin red pelagic limestone interlayers and conglomerates dominated by volcanic clasts. The overlying upper slope and lower slope units of the sequence consist of an alternation of allochthonous calcarenite/calcirudite beds and pelagic marls and mudstones. Calcarenite/calcirudite beds dominate the upper slope unit of the succession and are composed of transported material, including benthic foraminifers, red algae, bryozoan, crinoid and rudist fragments, inoceramid bivalve prisms and neritic and pelagic carbonate lithoclasts. The occurrence of Helicorbitoides boluensis (Sirel) extracted from the calcarenite/calcirudite beds indicates a Campanian age. Identifiable rudists such as Joufia reticulata Boehm, Bournonia cf. anatolica Ozer, Biradiolites cf. bulgaricus Pamouktchiev and ?Biradiolites sp. from the upper slope unit of the succession indicate a late Campanian- Maastrichtian age. The planktonic foraminifers within the red pelagic limestone beds, marls and mudstones throughout the succession consist mainly of Campanian-Maastrichtian forms and suggest mainly basinal depositional conditions. The presence of Radotruncana cf. calcarata (Cushman) accompanied by Globotruncanita elevata (Brotzen) in the basinal unit of the succession indicates an early late Campanian age for the lower part of the succession. Inoceramid bivalves have been collected from the upper part of the succession. The fauna is dominated by `Inoceramus' tenuilineatus Hall and Meek, 1854 and Cataceramus haldemensis (Giers, 1964); other taxa recognised are: `Inoceramus' algeriensis Heinz, 1932, Platyceramus vanuxemi (Meek and Hayden, 1860), `Inoceramus' cf. nebrascensis Owen, 1852, Cataceramus aff. barabini (Morton, 1834), Cataceramus gandjaensis (Aliev, 1956), and `Inoceramus' sp.; the assemblage indicates the `Inoceramus' tenuilineatus Zone; corresponding to the middle-late Campanian boundary interval. The uppermost part of the succession is characterized by the presence of the trace fossils Scolicia strozzii and Scolicia isp., indicating a mixed Skolithos-Cruziana ichnofacies. This ichnofacies suggests a well-oxygenated environment.

Anti-commutative Gröbner-Shirshov basis of a free Lie algebra

NASA Astrophysics Data System (ADS)

Bokut, L. A.; Chen, Yuqun; Li, Yu

2009-03-01

One of the natural ways to prove that the Hall words (Philip Hall, 1933) consist of a basis of a free Lie algebra is a direct construction: to start with a linear space spanned by Hall words, to define the Lie product of Hall words, and then to check that the product yields the Lie identities (Marshall Hall, 1950). Here we suggest another way using the Composition-Diamond lemma for free anti-commutative (non-associative) algebras (A.I. Shirshov, 1962).

Anomalous Hall resistance in bilayer quantum Hall systems

NASA Astrophysics Data System (ADS)

Ezawa, Z. F.; Suzuki, S.; Tsitsishvili, G.

2007-07-01

We present a microscopic theory of the Hall current in the bilayer quantum Hall system on the basis of noncommutative geometry. By analyzing the Heisenberg equation of motion and the continuity equation of charge, we demonstrate the emergence of the phase current in a system where the interlayer phase coherence develops spontaneously. The phase current arranges itself to minimize the total energy of the system, as it induces certain anomalous behaviors in the Hall current in the counterflow geometry and also in the drag experiment. They explain the recent experimental data for anomalous Hall resistances due to Kellogg [Phys. Rev. Lett. 88, 126804 (2002); 93, 036801 (2004)] and Tutuc [Phys. Rev. Lett. 93, 036802 (2004)] at ν=1 .

Reduced Spin Hall Effects from Magnetic Proximity.

DOE PAGES

Zhang, Wei; Jungfleisch, Matthias B.; Jiang, Wanjun; ...

2015-03-26

We investigate temperature-dependent spin pumping and inverse spin Hall effects in thin Pt and Pd in contact with Permalloy. Our experiments show a decrease of the spin Hall effect with decreasing temperature, which is attributed to a temperature-dependent proximity effect. The spin Hall angle decreases from 0.086 at room temperature to 0.042 at 10 K for Pt and is nearly negligible at 10 K for Pd. By first-principle calculations, we show that the spin Hall conductivity indeed reduces by increasing the proximity-induced spin magnetic moments for both Pt and Pd. This work highlights the important role of proximity-induced magnetic orderingmore » to spin Hall phenomena in Pt and Pd.« less

Tunneling Anomalous and Spin Hall Effects.

PubMed

Matos-Abiague, A; Fabian, J

2015-07-31

We predict, theoretically, the existence of the anomalous Hall effect when a tunneling current flows through a tunnel junction in which only one of the electrodes is magnetic. The interfacial spin-orbit coupling present in the barrier region induces a spin-dependent momentum filtering in the directions perpendicular to the tunneling current, resulting in a skew tunneling even in the absence of impurities. This produces an anomalous Hall conductance and spin Hall currents in the nonmagnetic electrode when a bias voltage is applied across the tunneling heterojunction. If the barrier is composed of a noncentrosymmetric material, the anomalous Hall conductance and spin Hall currents become anisotropic with respect to both the magnetization and crystallographic directions, allowing us to separate this interfacial phenomenon from the bulk anomalous and spin Hall contributions. The proposed effect should be useful for proving and quantifying the interfacial spin-orbit fields in metallic and metal-semiconductor systems.

Experimental test of 200 W Hall thruster with titanium wall

NASA Astrophysics Data System (ADS)

Ding, Yongjie; Sun, Hezhi; Peng, Wuji; Xu, Yu; Wei, Liqiu; Li, Hong; Li, Peng; Su, Hongbo; Yu, Daren

2017-05-01

We designed a 200 W Hall thruster based on the technology of pushing down a magnetic field with two permanent magnetic rings. Boron nitride (BN) is an important insulating wall material for Hall thrusters. The discharge characteristics of the designed Hall thruster were studied by replacing BN with titanium (Ti). Experimental results show that the designed Hall thruster can discharge stably for a long time under a Ti channel. Experiments were performed to determine whether the channel and cathode are electrically connected. When the channel wall and cathode are insulated, the divergence angle of the plume increases, but the performance of the Hall thruster is improved in terms of thrust, specific impulse, anode efficiency, and thrust-to-power ratio. Ti exhibits a powerful antisputtering capability, a low emanation rate of gas, and a large structural strength, making it a potential candidate wall material in the design of low-power Hall thrusters.

Spontaneous Hall effects in the electron system at the SmTiO3/EuTiO3 interface

NASA Astrophysics Data System (ADS)

Ahadi, Kaveh; Kim, Honggyu; Stemmer, Susanne

2018-05-01

Magnetotransport and magnetism of epitaxial SmTiO3/EuTiO3 heterostructures grown by molecular beam epitaxy are investigated. It is shown that the polar discontinuity at the interface introduces ˜3.9 × 1014 cm-2 carriers into the EuTiO3. The itinerant carriers exhibit two distinct contributions to the spontaneous Hall effect. The anomalous Hall effect appears despite a very small magnetization, indicating a non-collinear spin structure, and the second contribution resembles a topological Hall effect. Qualitative differences exist in the temperature dependence of both Hall effects when compared to uniformly doped EuTiO3. In particular, the topological Hall effect contribution appears at higher temperatures and the anomalous Hall effect shows a sign change with temperature. The results suggest that interfaces can be used to tune topological phenomena in itinerant magnetic systems.

Thermally driven anomalous Hall effect transitions in FeRh

NASA Astrophysics Data System (ADS)

Popescu, Adrian; Rodriguez-Lopez, Pablo; Haney, Paul M.; Woods, Lilia M.

2018-04-01

Materials exhibiting controllable magnetic phase transitions are currently in demand for many spintronics applications. Here, we investigate from first principles the electronic structure and intrinsic anomalous Hall, spin Hall, and anomalous Nernst response properties of the FeRh metallic alloy which undergoes a thermally driven antiferromagnetic-to-ferromagnetic phase transition. We show that the energy band structures and underlying Berry curvatures have important signatures in the various Hall effects. Specifically, the suppression of the anomalous Hall and Nernst effects in the antiferromagnetic state and a sign change in the spin Hall conductivity across the transition are found. It is suggested that the FeRh can be used as a spin current detector capable of differentiating the spin Hall effect from other anomalous transverse effects. The implications of this material and its thermally driven phases as a spin current detection scheme are also discussed.

78 FR 26682 - Culturally Significant Objects Imported for Exhibition Determinations: “Hall of Ancient Egypt”

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-07

... Determinations: ``Hall of Ancient Egypt'' AGENCY: Department of State. ACTION: Notice, correction. SUMMARY: On... determinations made by the Department of State pertaining to the exhibition ``Hall of Ancient Egypt.'' The... additional objects to be included in the exhibition ``Hall of Ancient Egypt,'' imported from abroad for...

Interior and Exterior Laser-Induced Fluorescence and Plasma Measurements within a Hall Thruster (Postprint)

DTIC Science & Technology

2002-02-01

ionized xenon in the plume and interior portions of the acceleration channel of a Hall thruster plasma discharge operating at powers ranging from 250...performed in the interior of the Hall thruster with resonance fluorescence collection. Optical access to the interior of the Hall thruster is

A New Definition in Atlanta: Q&A with Beverly Hall

ERIC Educational Resources Information Center

Crow, Tracy

2010-01-01

Beverly Hall has been superintendent of Atlanta Public Schools since 1999. Before coming to Atlanta, Hall was state district superintendent of Newark Public Schools, deputy chancellor for instruction of New York City Public Schools, superintendent of Community School District 27 in New York City, and a principal in Brooklyn. Hall chairs Harvard…

77 FR 21791 - Proposed Flood Hazard Determinations

Federal Register 2010, 2011, 2012, 2013, 2014

2012-04-11

... Town Hall, 2 Renshaw Road, Darien, CT 06820. Town of Fairfield John J. Sullivan Independence Hall, 725 Old Post Road, Fairfield, CT 06824. Town of Greenwich Town Hall, 101 Field Point Road, Greenwich, CT... at: http://www.rampp-team.com/md.htm Town of Accident Town Hall, 104 South North Street, Accident, MD...

Destruction of the Fractional Quantum Hall Effect by Disorder

DOE R&D Accomplishments Database

Laughlin, R. B.

1985-07-01

It is suggested that Hall steps in the fractional quantum Hall effect are physically similar to those in the ordinary quantum Hall effect. This proposition leads to a simple scaling diagram containing a new type of fixed point, which is identified with the destruction of the fractional states by disorder. 15 refs., 3 figs.

Throttling Impacts on Hall Thruster Performance, Erosion, and Qualification for NASA Science Missions

NASA Technical Reports Server (NTRS)

Dankanich, John W.; DeHoyos, Amado

2007-01-01

With the SMART-1, Department of Defense, and commercial industry successes in Hall thruster technologies, NASA has started considering Hall thrusters for science missions. The recent Discovery proposals included a Hall thruster science mission and the In-Space Propulsion Project is investing in Hall thruster technologies. As the confidence in Hall thrusters improve, ambitious multi-thruster missions are being considered. Science missions often require large throttling ranges due to the 1/r(sup 2) power drop-off from the sun. Deep throttling of Hall thrusters will impact the overall system performance. Also, Hall thrusters can be throttled with both current and voltage, impacting erosion rates and performance. Last, electric propulsion thruster lifetime qualification has previously been conducted with long duration full power tests. Full power tests may not be appropriate for NASA science missions, and a combination of lifetime testing at various power levels with sufficient analysis is recommended. Analyses of various science missions and throttling schemes using the Aerojet BPT-4000 and NASA 103M HiVHAC thruster are presented.

Effects of Ionospheric Hall Polarization on Magnetospheric Configurations and Dynamics in Global MHD Simulation

NASA Astrophysics Data System (ADS)

Nakamizo, A.; Yoshikawa, A.; Tanaka, T.

2017-12-01

We investigate how the M-I coupling and boundary conditions affects the results of global simulations of the magnetosphere. More specifically, we examine the effects of ionospheric Hall polarization on magnetospheric convection and dynamics by using an MHD code developed by Tanaka et al. [2010]. This study is motivated by the recently proposed idea that the ionospheric convection is modified by the ionospheric polarization [Yoshikawa et al., 2013]. We perform simulations for the following pairs of Hall conductance and IMF-By; Hall conductance set by αH = 2, 3.5, 5, and uniform distribution (1.0 [S] everywhere), where RH is the ratio of Hall to Pedersen conductance, and IMF-By of positive, negative, and zero. The results are summarized as follows. (a) Large-scale structure: In the cases of uniform Hall conductance, the magnetosphere is completely symmetric under the zero IMF-By. In the cases of non-uniform Hall conductance, the magnetosphere shows asymmetries globally even under the zero IMF-By. Asymmetries become severe for larger αH. The results indicate that ionospheric Hall polarization is one of the important factors to determine the global structure. (b) Formation of NENL: The location becomes closer to the earth and timing becomes earlier for larger RH. The difference is considered to be related to the combined effects of field lines twisting due to ionospheric Hall polarization and M-I energy/current closures. (c) Near-earth convection: In the cases of non-uniform Hall conductance, an inflection structure is formed around premidnight sector on equatorial plane inside 10 RE. Considering that the region 2 FAC is not sufficiently generated in MHD models, the structure corresponds to a convection reversal often shown in the RCM. Previous studies regard the structure as the Harang Reversal in the magnetosphere. In the cases of uniform Hall conductance, by contrast, such structure is not formed, indicating that the Harang Reversal may not be formed without the effect of ionospheric Hall polarization. The above initial research strongly suggests that the ionospheric Hall polarization plays a significant role in the M-I system.

WEB-IS2: Next Generation Web Services Using Amira Visualization Package

NASA Astrophysics Data System (ADS)

Yang, X.; Wang, Y.; Bollig, E. F.; Kadlec, B. J.; Garbow, Z. A.; Yuen, D. A.; Erlebacher, G.

2003-12-01

Amira (www.amiravis.com) is a powerful 3-D visualization package and has been employed recently by the science and engineering communities to gain insight into their data. We present a new web-based interface to Amira, packaged in a Java applet. We have developed a module called WEB-IS/Amira (WEB-IS2), which provides web-based access to Amira. This tool allows earth scientists to manipulate Amira controls remotely and to analyze, render and view large datasets over the internet, without regard for time or location. This could have important ramifications for GRID computing. The design of our implementation will soon allow multiple users to visually collaborate by manipulating a single dataset through a variety of client devices. These clients will only require a browser capable of displaying Java applets. As the deluge of data continues, innovative solutions that maximize ease of use without sacrificing efficiency or flexibility will continue to gain in importance, particularly in the Earth sciences. Major initiatives, such as Earthscope (http://www.earthscope.org), which will generate at least a terabyte of data daily, stand to profit enormously by a system such as WEB-IS/Amira (WEB-IS2). We discuss our use of SOAP (Livingston, D., Advanced SOAP for Web development, Prentice Hall, 2002), a novel 2-way communication protocol, as a means of providing remote commands, and efficient point-to-point transfer of binary image data. We will present our initial experiences with the use of Naradabrokering (www.naradabrokering.org) as a means to decouple clients and servers. Information is submitted to the system as a published item, while it is retrieved through a subscription mechanisms, via what is known as "topics". These topic headers, their contents, and the list of subscribers are automatically tracked by Naradabrokering. This novel approach promises a high degree of fault tolerance, flexibility with respect to client diversity, and language independence for the services (Erlebacher, G., Yuen, D.A., and F. Dubuffet, Current trends and demands in visualization in the geosciences, Electron. Geosciences, 4, 2001).

Anomalous Rashba spin-orbit interaction in electrically controlled topological insulator based on InN/GaN quantum wells

NASA Astrophysics Data System (ADS)

Łepkowski, Sławomir P.; Bardyszewski, Witold

2017-05-01

We study theoretically the topological phase transition and the Rashba spin-orbit interaction in electrically biased InN/GaN quantum wells. We show that that for properly chosen widths of quantum wells and barriers, one can effectively tune the system through the topological phase transition applying an external electric field perpendicular to the QW plane. We find that in InN/GaN quantum wells with the inverted band structure, when the conduction band s-type level is below the heavy hole and light hole p-type levels, the spin splitting of the subbands decreases with increasing the amplitude of the electric field in the quantum wells, which reveals the anomalous Rashba effect. Derived effective Rashba Hamiltonians can describe the subband spin splitting only for very small wave vectors due to strong coupling between the subbands. Furthermore, we demonstrate that for InN/GaN quantum wells in a Hall bar geometry, the critical voltage for the topological phase transition depends distinctly on the width of the structure and a significant spin splitting of the edge states lying in the 2D band gap can be almost switched off by increasing the electric field in quantum wells only by a few percent. We show that the dependence of the spin splitting of the upper branch of the edge state dispersion curve on the wave vector has a threshold-like behavior with the on/off spin splitting ratio reaching two orders of magnitude for narrow Hall bars. The threshold wave vector depends weakly on the Hall bar width, whereas it increases significantly with the bias voltage due to an increase of the energetic distance between the s-type and p-type quantum well energy levels and a reduction of the coupling between the subbands.

Anomalous Rashba spin-orbit interaction in electrically controlled topological insulator based on InN/GaN quantum wells.

PubMed

Łepkowski, Sławomir P; Bardyszewski, Witold

2017-05-17

We study theoretically the topological phase transition and the Rashba spin-orbit interaction in electrically biased InN/GaN quantum wells. We show that that for properly chosen widths of quantum wells and barriers, one can effectively tune the system through the topological phase transition applying an external electric field perpendicular to the QW plane. We find that in InN/GaN quantum wells with the inverted band structure, when the conduction band s-type level is below the heavy hole and light hole p-type levels, the spin splitting of the subbands decreases with increasing the amplitude of the electric field in the quantum wells, which reveals the anomalous Rashba effect. Derived effective Rashba Hamiltonians can describe the subband spin splitting only for very small wave vectors due to strong coupling between the subbands. Furthermore, we demonstrate that for InN/GaN quantum wells in a Hall bar geometry, the critical voltage for the topological phase transition depends distinctly on the width of the structure and a significant spin splitting of the edge states lying in the 2D band gap can be almost switched off by increasing the electric field in quantum wells only by a few percent. We show that the dependence of the spin splitting of the upper branch of the edge state dispersion curve on the wave vector has a threshold-like behavior with the on/off spin splitting ratio reaching two orders of magnitude for narrow Hall bars. The threshold wave vector depends weakly on the Hall bar width, whereas it increases significantly with the bias voltage due to an increase of the energetic distance between the s-type and p-type quantum well energy levels and a reduction of the coupling between the subbands.

Chills

MedlinePlus

... Accessed February 20, 2017. Hall JE. Body temperature regulation and fever. In: Hall JE, ed. Guyton and Hall Textbook of Medical Physiology . 13th ed. Philadelphia, PA: Elsevier; 2016:chap 74. ...

Faster Hall-Effect Current-Measuring Circuit

NASA Technical Reports Server (NTRS)

Sullender, Craig C.; Johnson, Daniel D.; Walker, Daniel D.

1993-01-01

Current-measuring circuit operates on Hall-effect-sensing and magnetic-field-nulling principles similar to those described in article, "Nulling Hall-Effect Current-Measuring Circuit" (LEW-15023), but simpler and responds faster. Designed without feedback loop, and analog pulse-width-modulated output indicates measured current. Circuit measures current at frequency higher than bandwidth of its Hall-effect sensor.

The Other Hall Effect: College Board Physics

ERIC Educational Resources Information Center

Sheppard, Keith; Gunning, Amanda M.

2013-01-01

Edwin Herbert Hall (1855-1938), discoverer of the Hall effect, was one of the first winners of the AAPT Oersted Medal for his contributions to the teaching of physics. While Hall's role in establishing laboratory work in high schools is widely acknowledged, his position as chair of the physics section of the Committee on College Entrance…

A Planar Hall Thruster for Investigating Electron Mobility in ExB Devices (Preprint)

DTIC Science & Technology

2007-08-24

Hall thruster that emits and collects the Hall current across a planar discharge channel is described. The planar Hall thruster (PHT) is being investigated for use as a test bed to study electron mobility in ExB devices. The planar geometry attempts to de-couple the complex electron motion found in annular thrusters by using simplified geometry. During this initial test, the PHT was operated at discharge voltages between 50-150 V to verify operability and stability of the device. Hall current was emitted by hollow cathode electron sources and

Plume Characteristics of the BHT-HD-600 Hall Thruster (Preprint)

DTIC Science & Technology

2006-07-01

Hall thruster on spacecraft, a number of plume properties have been measured. These include current density using a Faraday probe, ion energy distribution using a retarding potential analyzer, and ion species fractions using an E x B probe. The BHT-HD-600 Hall thruster is a nominally 600 W xenon Hall thruster developed by Busek Co. Inc. for the U.S. Air Force Research Laboratory. Plume characterization of Hall thrusters is required to fully understand the impacts of thruster operation on spacecraft. Much of these plume data are

Comment on "Effects of Magnetic Field Gradient on Ion Beam Current in Cylindrical Hall Ion Source

DOE Office of Scientific and Technical Information (OSTI.GOV)

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

It is argued that the key difference of the cylindrical Hall thruster (CHT) as compared to the end-Hall ion source cannot be exclusively attributed to the magnetic field topology [Tang et al. J. Appl. Phys., 102, 123305 (2007)]. With a similar mirror-type topology, the CHT configuration provides the electric field with nearly equipotential magnetic field surfaces and a better suppression of the electron cross-field transport, as compared to both the end-Hall ion source and the cylindrical Hall ion source of Tang et al.

NASA's Hall Thruster Program 2002

NASA Technical Reports Server (NTRS)

Jankovsky, Robert S.; Jacobson, David T.; Pinero, Luis R.; Manzella, David H.; Hofer, Richard R.; Peterson, Peter Y.

2002-01-01

The NASA Hall thruster program currently supports a number of tasks related to high power thruster development for a number of customers including the Energetics Program (formerly called the Space-based Program), the Space Solar Power Program, and the In-space Propulsion Program. In program year 2002, two tasks were central to the NASA Hall thruster program: 1) the development of a laboratory Hall thruster capable of providing high thrust at high power-, and 2) investigations into operation of Hall thrusters at high specific impulse. In addition to these two primary thruster development activities, there are a number of other on-going activities supported by the NASA Hall thruster program. These additional activities are related to issues such as high-power power processor architecture, thruster lifetime, and spacecraft integration.

Universal DC Hall conductivity of Jain's state ν = N/2N +/- 1

NASA Astrophysics Data System (ADS)

Nguyen, Dung; Son, Dam

We present the Fermi-liquid theory of the fractional quantum Hall effect to describe Jain's states with filling fraction ν =N/2 N +/- 1 , that are near half filling. We derive the DC Hall conductivity σH (t) in closed form within the validity of our model. The results show that, without long range interaction, DC Hall conductivity has the universal form which doesn't depend on the detail of short range Landau's parameters Fn. When long range interaction is included, DC Hall conductivity depends on both long range interaction and Landau's parameters. We also analyze the relation between DC Hall conductivity and static structure factor. This work was supported by the Chicago MRSEC, which is funded by NSF through Grant DMR-1420709.

Hall effect mobility for SiC MOSFETs with increasing dose of nitrogen implantation into channel region

NASA Astrophysics Data System (ADS)

Noguchi, Munetaka; Iwamatsu, Toshiaki; Amishiro, Hiroyuki; Watanabe, Hiroshi; Kita, Koji; Yamakawa, Satoshi

2018-04-01

The Hall effect mobility (μHall) of the Si-face 4H-SiC metal–oxide–semiconductor field effect transistor (MOSFET) with a nitrogen (N)-implanted channel region was investigated by increasing the N dose. The μHall in the channel region was systematically examined regarding channel structures, that is, the surface and buried channels. It was experimentally demonstrated that increasing the N dose results in an improvement in μHall in the channel region due to the formation of the buried channel. However, further increase in N dose was found to decrease the μHall in the channel region, owing to the decrease in the electron mobility in the N-implanted bulk region.

Sample size calculation for studies with grouped survival data.

PubMed

Li, Zhiguo; Wang, Xiaofei; Wu, Yuan; Owzar, Kouros

2018-06-10

Grouped survival data arise often in studies where the disease status is assessed at regular visits to clinic. The time to the event of interest can only be determined to be between two adjacent visits or is right censored at one visit. In data analysis, replacing the survival time with the endpoint or midpoint of the grouping interval leads to biased estimators of the effect size in group comparisons. Prentice and Gloeckler developed a maximum likelihood estimator for the proportional hazards model with grouped survival data and the method has been widely applied. Previous work on sample size calculation for designing studies with grouped data is based on either the exponential distribution assumption or the approximation of variance under the alternative with variance under the null. Motivated by studies in HIV trials, cancer trials and in vitro experiments to study drug toxicity, we develop a sample size formula for studies with grouped survival endpoints that use the method of Prentice and Gloeckler for comparing two arms under the proportional hazards assumption. We do not impose any distributional assumptions, nor do we use any approximation of variance of the test statistic. The sample size formula only requires estimates of the hazard ratio and survival probabilities of the event time of interest and the censoring time at the endpoints of the grouping intervals for one of the two arms. The formula is shown to perform well in a simulation study and its application is illustrated in the three motivating examples. Copyright © 2018 John Wiley & Sons, Ltd.

Hall viscosity and electromagnetic response of electrons in graphene

NASA Astrophysics Data System (ADS)

Sherafati, Mohammad; Principi, Alessandro; Vignale, Giovanni

The Hall viscosity is a dissipationless component of the viscosity tensor of an electron liquid with broken time- reversal symmetry, such as a two-dimensional electron gas (2DEG) in the quantum Hall state. Similar to the Hall conductivity, the Hall viscosity is an anomalous transport coefficient; however, while the former is connected with the current response, the latter stems from the stress response to a geometric deformation. For a Galilean-invariant system such as 2DEG, the current density is indeed the generator of the geometric deformation: therefore a connection between the Hall connectivity and viscosity is expected and by now well established. In the case of graphene, a non-Galilean-invariant system, the existence of such a connection is far from obvious, as the current operator is essentially different from the momentum operator. In this talk, I will first present our results of the geometric Hall viscosity of electrons in single-layer graphene. Then, from the expansion of the nonlocal Hall conductivity for small wave vectors, I demonstrate that, in spite of the lack of Galilean invariance, an effective mass can be defined such that the relationship between the Hall conductivity and the viscosity retains the form it has in Galilean-invariant systems, not only for a large number of occupied Landau levels, but also, with very high accuracy, for the undoped system.

75 FR 58411 - Medicare Program; Town Hall Meeting on the Physician Compare Web Site, October 27, 2010

Federal Register 2010, 2011, 2012, 2013, 2014

2010-09-24

...] Medicare Program; Town Hall Meeting on the Physician Compare Web Site, October 27, 2010 AGENCY: Centers for... establish a Physician Compare Web site by January 1, 2011. This notice announces a Town Hall meeting to discuss the Physician Compare Web site. The purpose of this Town Hall meeting is to solicit input from...

A Gift for Reading Hall No. 1

ERIC Educational Resources Information Center

MacWilliams, Bryon

2009-01-01

In this article, the author describes Reading Hall No. 1 of the Russian State Library. He was placed in the first reading hall in the mid-1990s, when the Russian government still honored Soviet traditions of granting certain privileges to certain foreigners. In the first hall, the rules are different. He can request as many books as he wants. He…

Encouraging Electricity Savings in a University Residential Hall through a Combination of Feedback, Visual Prompts, and Incentives

ERIC Educational Resources Information Center

Bekker, Marthinus J.; Cumming, Tania D.; Osborne, Nikola K. P.; Bruining, Angela M.; McClean, Julia I.; Leland, Louis S., Jr.

2010-01-01

This experiment investigated the combined use of visual prompts, daily feedback, and rewards to reduce electricity consumption in a university residential hall. After a 17-day baseline period, the experimental intervention was introduced in the intervention hall, and no change was made in the control hall. Energy usage decreased in the…

Realizing the Educational Potential of Residence Halls. Jossey-Bass Higher and Adult Education Series.

ERIC Educational Resources Information Center

Schroeder, Charles C.; Mable, Phyllis

This book addresses the need for integrating students' formal academic experiences with their informal out-of-class life in their residence halls. Organized in three parts, Part 1 focuses on the role of residence halls in educating students. Part 2 describes a variety of initiatives for promoting student learning in college residence halls. Part 3…

Exposure and materiality of the secondary room and its impact on the impulse response of coupled-volume concert halls

NASA Astrophysics Data System (ADS)

Ermann, Michael; Johnson, Marty

2005-06-01

How does sound decay when one room is partially exposed to another (acoustically coupled)? More specifically, this research aims to quantify how operational and design decisions impact sound fields in the design of concert halls with acoustical coupling. By adding a second room to a concert hall, and designing doors to control the sonic transparency between the two rooms, designers can create a new, coupled acoustic. Concert halls use coupling to achieve a variable, longer, and distinct reverberant quality for their musicians and listeners. For this study a coupled-volume shoebox concert hall is conceived with a fixed geometric volume, form, and primary-room sound absorption. Aperture size and secondary-room sound absorption levels are established as variables. Statistical analysis of sound decay in this simulated hall suggests a highly sensitive relationship between the double-sloped condition and (1) architectural composition, as defined by the aperture size exposing the chamber and (2) materiality, as defined by the sound absorptance in the coupled volume. The theoretical, mathematical predictions are compared with coupled-volume concert hall field measurements and guidelines are suggested for future designs of coupled-volume concert halls.

Strong Intrinsic Spin Hall Effect in the TaAs Family of Weyl Semimetals

NASA Astrophysics Data System (ADS)

Sun, Yan; Zhang, Yang; Felser, Claudia; Yan, Binghai

2016-09-01

Since their discovery, topological insulators are expected to be ideal spintronic materials owing to the spin currents carried by surface states with spin-momentum locking. However, the bulk doping problem remains an obstacle that hinders such an application. In this work, we predict that a newly discovered family of topological materials, the Weyl semimetals, exhibits a large intrinsic spin Hall effect that can be utilized to generate and detect spin currents. Our ab initio calculations reveal a large spin Hall conductivity in the TaAs family of Weyl materials. Considering the low charge conductivity of semimetals, Weyl semimetals are believed to present a larger spin Hall angle (the ratio of the spin Hall conductivity over the charge conductivity) than that of conventional spin Hall systems such as the 4 d and 5 d transition metals. The spin Hall effect originates intrinsically from the bulk band structure of Weyl semimetals, which exhibit a large Berry curvature and spin-orbit coupling, so the bulk carrier problem in the topological insulators is naturally avoided. Our work not only paves the way for employing Weyl semimetals in spintronics, but also proposes a new guideline for searching for the spin Hall effect in various topological materials.

Large anomalous Hall effect driven by a nonvanishing Berry curvature in the noncolinear antiferromagnet Mn3Ge.

PubMed

Nayak, Ajaya K; Fischer, Julia Erika; Sun, Yan; Yan, Binghai; Karel, Julie; Komarek, Alexander C; Shekhar, Chandra; Kumar, Nitesh; Schnelle, Walter; Kübler, Jürgen; Felser, Claudia; Parkin, Stuart S P

2016-04-01

It is well established that the anomalous Hall effect displayed by a ferromagnet scales with its magnetization. Therefore, an antiferromagnet that has no net magnetization should exhibit no anomalous Hall effect. We show that the noncolinear triangular antiferromagnet Mn3Ge exhibits a large anomalous Hall effect comparable to that of ferromagnetic metals; the magnitude of the anomalous conductivity is ~500 (ohm·cm)(-1) at 2 K and ~50 (ohm·cm)(-1) at room temperature. The angular dependence of the anomalous Hall effect measurements confirms that the small residual in-plane magnetic moment has no role in the observed effect except to control the chirality of the spin triangular structure. Our theoretical calculations demonstrate that the large anomalous Hall effect in Mn3Ge originates from a nonvanishing Berry curvature that arises from the chiral spin structure, and that also results in a large spin Hall effect of 1100 (ħ/e) (ohm·cm)(-1), comparable to that of platinum. The present results pave the way toward the realization of room temperature antiferromagnetic spintronics and spin Hall effect-based data storage devices.

Intrinsic quantum spin Hall and anomalous Hall effects in h-Sb/Bi epitaxial growth on a ferromagnetic MnO2 thin film.

PubMed

Zhou, Jian; Sun, Qiang; Wang, Qian; Kawazoe, Yoshiyuki; Jena, Puru

2016-06-07

Exploring a two-dimensional intrinsic quantum spin Hall state with a large band gap as well as an anomalous Hall state in realizable materials is one of the most fundamental and important goals for future applications in spintronics, valleytronics, and quantum computing. Here, by combining first-principles calculations with a tight-binding model, we predict that Sb or Bi can epitaxially grow on a stable and ferromagnetic MnO2 thin film substrate, forming a flat honeycomb sheet. The flatness of Sb or Bi provides an opportunity for the existence of Dirac points in the Brillouin zone, with its position effectively tuned by surface hydrogenation. The Dirac points in spin up and spin down channels split due to the proximity effects induced by MnO2. In the presence of both intrinsic and Rashba spin-orbit coupling, we find two band gaps exhibiting a large band gap quantum spin Hall state and a nearly quantized anomalous Hall state which can be tuned by adjusting the Fermi level. Our findings provide an efficient way to realize both quantized intrinsic spin Hall conductivity and anomalous Hall conductivity in a single material.

Astronaut Hall of Fame

NASA Image and Video Library

2018-04-21

Thomas D. Jones, Ph.D., in the center, is inducted into the Astronaut Hall of Fame (AHOF) during a ceremony inside the Space Shuttle Atlantis attraction at NASA’s Kennedy Space Center Visitor Complex in Florida. At left, Hall of Famer Curt Brown, board chairman, Astronaut Scholarship Foundation (ASF), inducts Jones into the Hall of Fame Class of 2018. At right is Hall of Famer Storey Musgrave, who spoke on Jones behalf during the ceremony. Also inducted was retired astronaut Scott D. Altman. Inductees into the Hall of Fame are selected by a committee of Hall of Fame astronauts, former NASA officials, flight directors, historians and journalists. The process is administered by the Astronaut Scholarship Foundation. To be eligible, an astronaut must have made his or her first flight at least 17 years before the induction. Candidates must be a U.S. citizen and a NASA-trained commander, pilot or mission specialist who has orbited the earth at least once. Including Altman and Jones, 97 astronauts have been inducted into the AHOF.

Magnetic field deformation due to electron drift in a Hall thruster

NASA Astrophysics Data System (ADS)

Liang, Han; Yongjie, Ding; Xu, Zhang; Liqiu, Wei; Daren, Yu

2017-01-01

The strength and shape of the magnetic field are the core factors in the design of the Hall thruster. However, Hall current can affect the distribution of static magnetic field. In this paper, the Particle-In-Cell (PIC) method is used to obtain the distribution of Hall current in the discharge channel. The Hall current is separated into a direct and an alternating part to calculate the induced magnetic field using Finite Element Method Magnetics (FEMM). The results show that the direct Hall current decreases the magnetic field strength in the acceleration region and also changes the shape of the magnetic field. The maximum reduction in radial magnetic field strength in the exit plane is 10.8 G for an anode flow rate of 15 mg/s and the maximum angle change of the magnetic field line is close to 3° in the acceleration region. The alternating Hall current induces an oscillating magnetic field in the whole discharge channel. The actual magnetic deformation is shown to contain these two parts.

Not your grandfather's concert hall

NASA Astrophysics Data System (ADS)

Cooper, Russell; Malenka, Richard; Griffith, Charles; Friedlander, Steven

2004-05-01

The opening of Judy and Arthur Zankel Hall on 12 September 2003, restores Andrew Carnegie's original 1891 concept of having three outstanding auditoriums of different sizes under one roof, and creates a 21st-century venue for music performance and education. With concerts ranging from early music to avant-garde multimedia productions, from jazz to world music, and from solo recitals to chamber music, Zankel Hall expands the breadth and depth of Carnegie Hall's offerings. It allows for the integration of programming across three halls with minifestivals tailored both to the size and strengths of each hall and to the artists and music to be performed. The new flexible space also provides Carnegie Hall with an education center equipped with advanced communications technology. This paper discusses the unique program planned for this facility and how the architects, theatre consultants, and acousticians developed a design that fulfilled the client's expectations and coordinated the construction of the facility under the floor of the main Isaac Stern Auditorium without having to cancel a single performance.

Giant Hall Photoconductivity in Narrow-Gapped Dirac Materials

NASA Astrophysics Data System (ADS)

Song, Justin C. W.; Kats, Mikhail A.

2016-12-01

Carrier dynamics acquire a new character in the presence of Bloch-band Berry curvature, which naturally arises in gapped Dirac materials (GDMs). Here we argue that photoresponse in GDMs with small band gaps is dramatically enhanced by Berry curvature. This manifests in a giant and saturable Hall photoconductivity when illuminated by circularly polarized light. Unlike Hall motion arising from a Lorentz force in a magnetic field, which impedes longitudinal carrier motion, Hall photoconductivity arising from Berry curvature can boost longitudinal carrier transport. In GDMs, this results in a helicity-dependent photoresponse in the Hall regime, where photoconductivity is dominated by its Hall component. We find that the induced Hall conductivity per incident irradiance is enhanced by up to six orders of magnitude when moving from the visible regime (with corresponding band gaps) to the far infrared. These results suggest that narrow-gap GDMs are an ideal test-bed for the unique physics that arise in the presence of Berry curvature, and open a new avenue for infrared and terahertz optoelectronics.

Turbulence Measurements in a Tropical Zoo Hall

NASA Astrophysics Data System (ADS)

Eugster, Werner; Denzler, Basil; Bogdal, Christian

2017-04-01

The Masoala rainforest hall of the Zurich Zoo, Switzerland, covers a ground surface area of 10,856 m2 and reaches 30 m in height. With its transparent ETFE foiled roof it provides a tropical climate for a large diversity of plants and animals. In combination with an effort to estimate dry deposition of elemental mercury, we made an attempt to measure turbulent transfer velocity with an ultrasonic anemometer inside the hall. Not surprising, the largest turbulence elements were on the order of the hall dimension. Although the dimensions of the hall seem to be small (200,000 m3) for eddy covariance flux measurements and the air circulation inside the hall was extremely weak, the spectra of wind velocity components and virtual (sonic) temperature obeyed the general statistical description expected under unconstrained outdoor measurement conditions. We will present results from a two-week measurement campaign in the Masoala rainforest hall and make a suggestion for the deposition velocity to be used to estimate dry deposition of atmospheric components to the tropical vegetation surface.

Roles of nonlocal conductivity on spin Hall angle measurement

NASA Astrophysics Data System (ADS)

Chen, Kai; Zhang, Shufeng

2017-10-01

Spin Hall angle characterizes the rate of spin-charge current conversion and it has become one of the most important material parameters for spintronics physics and device application. A long-standing controversy is that the spin Hall angles for a given material measured by spin pumping and by spin Hall torque experiments are inconsistent and they could differ by as much as an order of magnitude. By using the linear response spin transport theory, we explicitly formulate the relation between the spin Hall angle and measured variables in different experiments. We find that the nonlocal conductivity inherited in the layered structure plays a key role to resolve conflicting values of the spin Hall angle. We provide a generalized scheme for extracting spin transport coefficients from experimental data.

Hall Thruster Technology for NASA Science Missions

NASA Technical Reports Server (NTRS)

Manzella, David; Oh, David; Aadland, Randall

2005-01-01

The performance of a prototype Hall thruster designed for Discovery-class NASA science mission applications was evaluated at input powers ranging from 0.2 to 2.9 kilowatts. These data were used to construct a throttle profile for a projected Hall thruster system based on this prototype thruster. The suitability of such a Hall thruster system to perform robotic exploration missions was evaluated through the analysis of a near Earth asteroid sample return mission. This analysis demonstrated that a propulsion system based on the prototype Hall thruster offers mission benefits compared to a propulsion system based on an existing ion thruster.

Interior detail of dispatch boards in main hall, facing west ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Interior detail of dispatch boards in main hall, facing west - International Longshoremen's & Warehousemen's Union Hall, Naval Civil Engineering Laboratory, Port Hueneme Road, Port Hueneme, Ventura County, CA

View of north front and west sides of hall, facing ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View of north front and west sides of hall, facing south - International Longshoremen's & Warehousemen's Union Hall, Naval Civil Engineering Laboratory, Port Hueneme Road, Port Hueneme, Ventura County, CA

"Nostalgia for What Cannot Be": An Interpretive and Social Biography of Stuart Hall's Early Years in Jamaica and England, 1932-1959

ERIC Educational Resources Information Center

Henry, Annette

2015-01-01

Much has been written about Stuart Hall's intellectual and theoretical contributions especially after the mid-1960s. This interpretive and social biography places Stuart Hall's life from 1932 to 1959 in a socio-historical context, beginning with his childhood in Jamaica and his early years in England. I draw on Hall's own biographical reflections…

Military Space Doctrine: the Great Frontier.

DTIC Science & Technology

1981-04-03

Hall 0745 Conference Registration Fairchild Hall H-1 (Continental breakfast served in conference area included in registration fee 0810 Movie : (optional...roundtable sign-ups 1200 Cadet Lunch Formation Review Eagle and Fledglings 1220 Lunch with Cadet Wing Mitchell Hall (cost collected at registration...Continental breakfast at conference area (included in the registration fee) 0755 Movie : (optional) Space - The New Ocean Fairchild Hall H-i 0800 Opening

Perceived Effectiveness of Hall Director Leadership Style on the Satisfaction of Resident Assistants in Mississippi

ERIC Educational Resources Information Center

Morris, Rheo Joelyn Avorice

2009-01-01

The purpose of this study was to ascertain which leadership style correlates most with RA satisfaction in residence halls at three public universities in Mississippi. When satisfied, RAs will be more efficient in their roles and this will transfer to students residing in the halls. As a result more students in the residence halls will become more…

2017 Astronaut Hall of Fame Induction Ceremony

NASA Image and Video Library

2017-05-19

In the Space Shuttle Atlantis facility at the Kennedy Space Center Visitor Complex in Florida, Astronaut Scholarship Foundation Chairman Dan Brandenstein, left, also a Hall of Fame astronaut, presents inductee Michael Foale with his hall of fame medal. Former NASA Administrator Charlie Bolden, right, a Hall of Fame member, presented Foale for induction. During this year's ceremonies, space shuttle astronaut Ellen Ochoa also was enshrined.

2017 Astronaut Hall of Fame Induction Ceremony

NASA Image and Video Library

2017-05-19

In the Space Shuttle Atlantis facility at the Kennedy Space Center Visitor Complex in Florida, Astronaut Scholarship Foundation Chairman Dan Brandenstein, left, also a Hall of Fame astronaut, presents inductee Ellen Ochoa with her hall of fame medal. Former Johnson Space Center Director Mike Coats, right, a Hall of Fame member, presented Ochoa for induction. During this year's ceremonies, space shuttle astronaut Michael Foale also was enshrined.

122. HISTORIC AMERICAN BUILDINGS SURVEY TEAM MEASURING EXTERIOR OF INDEPENDENCE ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

122. HISTORIC AMERICAN BUILDINGS SURVEY TEAM MEASURING EXTERIOR OF INDEPENDENCE HALL (LEE NELSON ON CORNER LEANING OVER) - Independence Hall Complex, Independence Hall, 500 Chestnut Street, Philadelphia, Philadelphia County, PA

Numerical analysis of Hall effect on the performance of magnetohydrodynamic heat shield system based on nonequilibrium Hall parameter model

NASA Astrophysics Data System (ADS)

Li, Kai; Liu, Jun; Liu, Weiqiang

2017-01-01

Magnetohydrodynamic (MHD) heat shield system, a novel thermal protection technique in the hypersonic field, has been paid much attention in recent years. In the real flight condition, not only the Lorentz force but also the Hall electric field is induced by the interaction between ionized air post shock and magnetic field. In order to analyze the action mechanisms of the Hall effect, numerical methods of coupling thermochemical nonequilibrium flow field with externally applied magnetic field as well as the induced electric field are constructed and validated. Based on the nonequilibrium model of Hall parameter, numerical simulations of the MHD heat shield system is conducted under two different magnetic induction strengths (B0=0.2 T, 0.5 T) on a reentry capsule forebody. Results show that, the Hall effect is the same under the two magnetic induction strengths when the wall is assumed to be conductive. For this case, with the Hall effect taken into account, the Lorentz force counter stream diminishes a lot and the circumferential component dominates, resulting that the heat flux and shock-off distance approach the case without MHD control. However, for the insulating wall, the Hall effect acts in different ways under these two magnetic induction strengths. For this case, with the Hall effect taken into account, the performance of MHD heat shield system approaches the case neglecting the Hall effect when B0 equals 0.2 T. Such performance becomes worse when B0 equals 0.5 T and the aerothermal environment on the capsule shoulder is even worse than the case without MHD control.

Timber Creek bunkhouse and mess hall, Rocky Mountain National Park. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Timber Creek bunkhouse and mess hall, Rocky Mountain National Park. Interior, kitchen and dining area, viewing north. - Timber Creek Bunkhouse & Mess Hall, Trail Ridge Road, Grand Lake, Grand County, CO

4. MESS HALL, FRONT DETAIL OVER DOOR, LOOKING EAST. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. MESS HALL, FRONT DETAIL OVER DOOR, LOOKING EAST. - NIKE Missile Base C-84, Mess Hall, North of Launch Area Entrance Drive, east of Officers' Quarters & Administration Building, Barrington, Cook County, IL

3. MESS HALL, REAR SIDE, LOOKING NORTH. NIKE Missile ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. MESS HALL, REAR SIDE, LOOKING NORTH. - NIKE Missile Base SL-40, Mess Hall, East central portion of base, southeast of Barracks No. 2, northwest of Administration Building, Hecker, Monroe County, IL

2. MESS HALL, RIGHT SIDE, LOOKING EAST. NIKE Missile ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

2. MESS HALL, RIGHT SIDE, LOOKING EAST. - NIKE Missile Base SL-40, Mess Hall, East central portion of base, southeast of Barracks No. 2, northwest of Administration Building, Hecker, Monroe County, IL

Detail of main hall porch on east elevation; camera facing ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Detail of main hall porch on east elevation; camera facing west. - Mare Island Naval Shipyard, Wilderman Hall, Johnson Lane, north side adjacent to (south of) Hospital Complex, Vallejo, Solano County, CA

Interior detail of platform in main hall, with desk, flag, ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Interior detail of platform in main hall, with desk, flag, and banners, facing south - International Longshoremen's & Warehousemen's Union Hall, Naval Civil Engineering Laboratory, Port Hueneme Road, Port Hueneme, Ventura County, CA

KSC-2013-2071

NASA Image and Video Library

2013-04-20

CAPE CANAVERAL, Fla. – At NASA’s Kennedy Space Center Visitor Complex in Florida, Kennedy Space Center Director and Hall of Famer Robert Cabana speaks during the U.S. Astronaut Hall of Fame 2013 induction ceremony. Curt Brown, Eileen Collins and Bonnie Dunbar were inducted into the U.S. Astronaut Hall of Fame. This induction is the twelfth group of space shuttle astronauts named to the AHOF, and the first time two women are inducted at the same time. The year’s inductees were selected by a committee of current Hall of Fame astronauts, former NASA officials, historians and journalists. The selection process is administered by the Astronaut Scholarship Foundation. For more on the U.S. Astronaut Hall of Fame, go to http://www.kennedyspacecenter.com/astronaut-hall-of-fame.aspx For more on the Astronaut Scholarship Foundation, go to http://astronautscholarship.org/ Photo credit: NASA/ Kim Shiflett

Formulation of the relativistic quantum Hall effect and parity anomaly

NASA Astrophysics Data System (ADS)

Yonaga, Kouki; Hasebe, Kazuki; Shibata, Naokazu

2016-06-01

We present a relativistic formulation of the quantum Hall effect on Haldane sphere. An explicit form of the pseudopotential is derived for the relativistic quantum Hall effect with/without mass term. We clarify particular features of the relativistic quantum Hall states with the use of the exact diagonalization study of the pseudopotential Hamiltonian. Physical effects of the mass term to the relativistic quantum Hall states are investigated in detail. The mass term acts as an interpolating parameter between the relativistic and nonrelativistic quantum Hall effects. It is pointed out that the mass term unevenly affects the many-body physics of the positive and negative Landau levels as a manifestation of the "parity anomaly." In particular, we explicitly demonstrate the instability of the Laughlin state of the positive first relativistic Landau level with the reduction of the charge gap.

Remote Diagnostic Measurements of Hall Thruster Plumes

DTIC Science & Technology

2009-08-14

This paper describes measurements of Hall thruster plumes that characterize ion energy distributions and charge state fractions using remotely...charge state. Next, energy and charge state measurements are described from testing of a 200 W Hall thruster at AFIT. Measurements showed variation in...position. Finally, ExB probe charge state measurements are presented from a 6-kW laboratory Hall thruster operated at low discharge voltage levels at AFRL

Performance Characteristics of a 5 kW Laboratory Hall Thruster

DTIC Science & Technology

1996-07-01

Characteristics of a 5 kW Laboratory Hall Thruster James M. Haas’, Frank S. Gulczinski III%, and Alec D. Gallimoret Plasmadynamics and Electric Propulsion...the information learned from the study of this thruster applicable to the understanding of its commercial counterparts. INTRODUCTION Hall thrusters are...few in number at this time; and those that do exist are intended primarily Current generation Hall thruster research has for flight qualification

Quantum Hall effect in ac driven graphene: From the half-integer to the integer case

NASA Astrophysics Data System (ADS)

Ding, Kai-He; Lim, Lih-King; Su, Gang; Weng, Zheng-Yu

2018-01-01

We theoretically study the quantum Hall effect (QHE) in graphene with an ac electric field. Based on the tight-binding model, the structure of the half-integer Hall plateaus at σxy=±(n +1 /2 ) 4 e2/h (n is an integer) gets qualitatively changed with the addition of new integer Hall plateaus at σxy=±n (4 e2/h ) starting from the edges of the band center regime towards the band center with an increasing ac field. Beyond a critical field strength, a Hall plateau with σxy=0 can be realized at the band center, hence fully restoring a conventional integer QHE with particle-hole symmetry. Within a low-energy Hamiltonian for Dirac cones merging, we show a very good agreement with the tight-binding calculations for the Hall plateau transitions. We also obtain the band structure for driven graphene ribbons to provide a further understanding on the appearance of the new Hall plateaus, showing a trivial insulator behavior for the σxy=0 state. In the presence of disorder, we numerically study the disorder-induced destruction of the quantum Hall states in a finite driven sample and find that qualitative features known in the undriven disordered case are maintained.

Spontaneous Hall effect in a chiral p-wave superconductor

NASA Astrophysics Data System (ADS)

Furusaki, Akira; Matsumoto, Masashige; Sigrist, Manfred

2001-08-01

In a chiral superconductor with broken time-reversal symmetry a ``spontaneous Hall effect'' may be observed. We analyze this phenomenon by taking into account the surface properties of a chiral superconductor. We identify two main contributions to the spontaneous Hall effect. One contribution originates from the Bernoulli (or Lorentz) force due to spontaneous currents running along the surfaces of the superconductor. The other contribution has a topological origin and is related to the intrinsic angular momentum of Cooper pairs. The latter can be described in terms of a Chern-Simons-like term in the low-energy field theory of the superconductor and has some similarities with the quantum Hall effect. The spontaneous Hall effect in a chiral superconductor is, however, nonuniversal. Our analysis is based on three approaches to the problem: a self-consistent solution of the Bogoliubov-de Gennes equation, a generalized Ginzburg-Landau theory, and a hydrodynamic formulation. All three methods consistently lead to the same conclusion that the spontaneous Hall resistance of a two-dimensional superconducting Hall bar is of order h/(ekFλ)2, where kF is the Fermi wave vector and λ is the London penetration depth; the Hall resistance is substantially suppressed from a quantum unit of resistance. Experimental issues in measuring this effect are briefly discussed.

The shear-Hall instability in newborn neutron stars

NASA Astrophysics Data System (ADS)

Kondić, T.; Rüdiger, G.; Hollerbach, R.

2011-11-01

Aims: In the first few minutes of a newborn neutron star's life the Hall effect and differential rotation may both be important. We demonstrate that these two ingredients are sufficient for generating a "shear-Hall instability" and for studying its excitation conditions, growth rates, and characteristic magnetic field patterns. Methods: We numerically solve the induction equation in a spherical shell, with a kinematically prescribed differential rotation profile Ω(s), where s is the cylindrical radius. The Hall term is linearized about an imposed uniform axial field. The linear stability of individual azimuthal modes, both axisymmetric and non-axisymmetric, is then investigated. Results: For the shear-Hall instability to occur, the axial field must be parallel to the rotation axis if Ω(s) decreases outward, whereas if Ω(s) increases outward it must be anti-parallel. The instability draws its energy from the differential rotation, and occurs on the short rotational timescale rather than on the much longer Hall timescale. It operates most efficiently if the Hall time is comparable to the diffusion time. Depending on the precise field strengths B0, either axisymmetric or non-axisymmetric modes may be the most unstable. Conclusions: Even if the differential rotation in newborn neutron stars is quenched within minutes, the shear-Hall instability may nevertheless amplify any seed magnetic fields by many orders of magnitude.

Intrinsic Spin-Hall Effect in n-Doped Bulk GaAs

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bernevig, B.Andrei; Zhang, Shou-Cheng; /Stanford U., Phys. Dept.

2010-01-15

We show that the bulk Dresselhauss (k{sup 3}) spin-orbit coupling term leads to an intrinsic spin-Hall effect in n-doped bulk GaAs, but without the appearance of uniform magnetization. The spin-Hall effect in strained and unstrained bulk GaAs has been recently observed experimentally by Kato et. al. [1]. We show that the experimental result is quantitatively consistent with the intrinsic spin-Hall effect due to the Dresselhauss term, when lifetime broadening is taken into account. On the other hand, extrinsic contribution to the spin-Hall effect is several orders of magnitude smaller than the observed effect.

Interplay between snake and quantum edge states in a graphene Hall bar with a pn-junction

DOE Office of Scientific and Technical Information (OSTI.GOV)

Milovanović, S. P., E-mail: slavisa.milovanovic@uantwerpen.be; Peeters, F. M., E-mail: francois.peeters@uantwerpen.be; Ramezani Masir, M., E-mail: mrmphys@gmail.com

2014-09-22

The magneto- and Hall resistance of a locally gated cross shaped graphene Hall bar is calculated. The edge of the top gate is placed diagonally across the center of the Hall cross. Four-probe resistance is calculated using the Landauer-Büttiker formalism, while the transmission coefficients are obtained using the non-equilibrium Green's function approach. The interplay between transport due to edge channels and snake states is investigated. When two edge channels are occupied, we predict oscillations in the Hall and the bend resistance as function of the magnetic field, which are a consequence of quantum interference between the occupied snake states.

Anisotropic anomalous Hall effect in triangular itinerant ferromagnet Fe3GeTe2

NASA Astrophysics Data System (ADS)

Wang, Yihao; Xian, Cong; Wang, Jian; Liu, Bingjie; Ling, Langsheng; Zhang, Lei; Cao, Liang; Qu, Zhe; Xiong, Yimin

2017-10-01

Magnetic frustrated materials are of great interest for their novel spin-dependent transport properties. We report an anisotropic anomalous Hall effect in the triangular itinerant ferromagnet Fe3GeTe2 . When the current flows along the a b plane, Fe3GeTe2 exhibits the conventional anomalous Hall effect below the Curie temperature Tc, which can be depicted by Karplus-Luttinger theory. On the other hand, the topological Hall effect shows up below Tc with current along the c axis. The enhancement of Hall resistivity can be attributed to the chiral effect during the spin-flop process.

Comment on 'Effects of magnetic field gradient on ion beam current in cylindrical Hall ion source' [J. Appl. Phys. 102, 123305 (2007)

DOE Office of Scientific and Technical Information (OSTI.GOV)

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

It is argued that the key difference in the cylindrical Hall thruster (CHT) as compared to the end-Hall ion source cannot be exclusively attributed to the magnetic field topology [Tang et al., J. Appl. Phys. 102, 123305 (2007)]. With a similar mirror-type topology, the CHT configuration provides the electric field with nearly equipotential magnetic field surfaces and a better suppression of the electron cross-field transport, as compared to both the end-Hall ion source and the cylindrical Hall ion source of [Tang et al., J. Appl. Phys. 102, 123305 (2007)].

Monte Carlo simulation of spectral reflectance and BRDF of the bubble layer in the upper ocean.

PubMed

Ma, Lanxin; Wang, Fuqiang; Wang, Chengan; Wang, Chengchao; Tan, Jianyu

2015-09-21

The presence of bubbles can significantly change the radiative properties of seawater and these changes will affect remote sensing and underwater target detection. In this work, the spectral reflectance and bidirectional reflectance characteristics of the bubble layer in the upper ocean are investigated using the Monte Carlo method. The Hall-Novarini (HN) bubble population model, which considers the effect of wind speed and depth on the bubble size distribution, is used. The scattering coefficients and the scattering phase functions of bubbles in seawater are calculated using Mie theory, and the inherent optical properties of seawater for wavelengths between 300 nm and 800 nm are related to chlorophyll concentration (Chl). The effects of bubble coating, Chl, and bubble number density on the spectral reflectance of the bubble layer are studied. The bidirectional reflectance distribution function (BRDF) of the bubble layer for both normal and oblique incidence is also investigated. The results show that bubble populations in clear waters under high wind speed conditions significantly influence the reflection characteristics of the bubble layer. Furthermore, the contribution of bubble populations to the reflection characteristics is mainly due to the strong backscattering of bubbles that are coated with an organic film.

3. Historic American Buildings Survey, Courtesy of Oregon Historical Society, ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

3. Historic American Buildings Survey, Courtesy of Oregon Historical Society, Photo from 'West Shore' VILLIARD HALL, 1886, DEADY HALL, 1876. - University of Oregon, Deady Hall, University of Oregon Campus, Eugene, Lane County, OR

77 FR 18837 - Proposed Flood Hazard Determinations

Federal Register 2010, 2011, 2012, 2013, 2014

2012-03-28

... of Roswell City Hall, 38 Hill Street, Suite 235, Roswell, GA 30075. City of Sandy Springs City Hall, 7840 Roswell Road, Building 500, Sandy Springs, GA 30350. City of Union City City Hall, 5047 Union...

5. MESS HALL, RIGHT AND REAR SIDES, LOOKING NORTHEAST. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

5. MESS HALL, RIGHT AND REAR SIDES, LOOKING NORTHEAST. - NIKE Missile Base SL-40, Mess Hall, East central portion of base, southeast of Barracks No. 2, northwest of Administration Building, Hecker, Monroe County, IL

6. PHOTOCOPY, PLAN AND SCHEDULE DRAWING OF MESS HALL. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

6. PHOTOCOPY, PLAN AND SCHEDULE DRAWING OF MESS HALL. - NIKE Missile Base SL-40, Mess Hall, East central portion of base, southeast of Barracks No. 2, northwest of Administration Building, Hecker, Monroe County, IL

Interior of Mess Hall, showing original columns and quarry tile ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Interior of Mess Hall, showing original columns and quarry tile floor - U.S. Naval Base, Pearl Harbor, Barracks & Mess Hall, Hornet Avenue between Liscome Bay & Enterprise Streets, Pearl City, Honolulu County, HI

7. PHOTOCOPY, ELEVATION AND SECTION DRAWING OF MESS HALL. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

7. PHOTOCOPY, ELEVATION AND SECTION DRAWING OF MESS HALL. - NIKE Missile Base SL-40, Mess Hall, East central portion of base, southeast of Barracks No. 2, northwest of Administration Building, Hecker, Monroe County, IL

4. MESS HALL, FRONT AND LEFT SIDES, LOOKING SOUTHWEST. ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

4. MESS HALL, FRONT AND LEFT SIDES, LOOKING SOUTHWEST. - NIKE Missile Base SL-40, Mess Hall, East central portion of base, southeast of Barracks No. 2, northwest of Administration Building, Hecker, Monroe County, IL

Contextual view of ILWU Hall, facing northwest with commercial port ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Contextual view of ILWU Hall, facing northwest with commercial port buildings visible in the background - International Longshoremen's & Warehousemen's Union Hall, Naval Civil Engineering Laboratory, Port Hueneme Road, Port Hueneme, Ventura County, CA

Contextual view of ILWU Hall, facing southsouthwest, with ocean bank ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Contextual view of ILWU Hall, facing south-southwest, with ocean bank visible in the background - International Longshoremen's & Warehousemen's Union Hall, Naval Civil Engineering Laboratory, Port Hueneme Road, Port Hueneme, Ventura County, CA

Probing the thermal Hall effect using miniature capacitive strontium titanate thermometry

DOE Office of Scientific and Technical Information (OSTI.GOV)

Tinsman, Colin; Li, Gang; Asaba, Tomoya

2016-06-27

The thermal Hall effect is the thermal analog of the electrical Hall effect. Rarely observed in normal metals, thermal Hall signals have been argued to be a key property for a number of strongly correlated materials, such as high temperature superconductors, correlated topological insulators, and quantum magnets. The observation of the thermal Hall effect requires precise measurement of temperature in intense magnetic fields. Particularly at low temperature, resistive thermometers have a strong dependence on field, which makes them unsuitable for this purpose. We have created capacitive thermometers which instead measure the dielectric constant of strontium titanate (SrTiO{sub 3}). SrTiO{sub 3}more » approaches a ferroelectric transition, causing its dielectric constant to increase by a few orders of magnitude at low temperature. As a result, these thermometers are very sensitive at low temperature while having very little dependence on the applied magnetic field, making them ideal for thermal Hall measurements. We demonstrate this method by making measurements of the thermal Hall effect in Bismuth in magnetic fields of up to 10 T.« less

Astronaut Hall of Fame

NASA Image and Video Library

2018-04-21

Scott D. Altman, second from left, is inducted into the Astronaut Hall of Fame (AHOF) during a ceremony inside the Space Shuttle Atlantis attraction at NASA's Kennedy Space Center Visitor Complex in Florida. At far left, Hall of Famer Curt Brown, board chairman, Astronaut Scholarship Foundation (ASF), inducts Altman into the Hall of Fame Class of 2018. At right is Hall of Famer John Grunsfeld, who spoke on Altman's behalf during the ceremony. At far right is Thomas D. Jones, Ph.D., who also was inducted into the AHOF Class of 2018. Inductees into the Hall of Fame are selected by a committee of Hall of Fame astronauts, former NASA officials, flight directors, historians and journalists. The process is administered by the Astronaut Scholarship Foundation. To be eligible, an astronaut must have made his or her first flight at least 17 years before the induction. Candidates must be a U.S. citizen and a NASA-trained commander, pilot or mission specialist who has orbited the earth at least once. Including Altman and Jones, 97 astronauts have been inducted into the AHOF.

Accelerating 3D Hall MHD Magnetosphere Simulations with Graphics Processing Units

NASA Astrophysics Data System (ADS)

Bard, C.; Dorelli, J.

2017-12-01

The resolution required to simulate planetary magnetospheres with Hall magnetohydrodynamics result in program sizes approaching several hundred million grid cells. These would take years to run on a single computational core and require hundreds or thousands of computational cores to complete in a reasonable time. However, this requires access to the largest supercomputers. Graphics processing units (GPUs) provide a viable alternative: one GPU can do the work of roughly 100 cores, bringing Hall MHD simulations of Ganymede within reach of modest GPU clusters ( 8 GPUs). We report our progress in developing a GPU-accelerated, three-dimensional Hall magnetohydrodynamic code and present Hall MHD simulation results for both Ganymede (run on 8 GPUs) and Mercury (56 GPUs). We benchmark our Ganymede simulation with previous results for the Galileo G8 flyby, namely that adding the Hall term to ideal MHD simulations changes the global convection pattern within the magnetosphere. Additionally, we present new results for the G1 flyby as well as initial results from Hall MHD simulations of Mercury and compare them with the corresponding ideal MHD runs.

Influence of Mn concentration on magnetic topological insulator Mn xBi 2−xTe 3 thin-film Hall-effect sensor

DOE PAGES

Ni, Y.; Zhang, Z.; Nlebedim, I. C.; ...

2015-06-11

Hall-effect (HE) sensors based on high-quality Mn-doped Bi 2Te 3 topological insulator (TI) thin films have been systematically studied in this paper. Improvement of Hall sensitivity is found after doping the magnetic element Mn into Bi 2Te 3. The sensors with low Mn concentrations, Mn xBi 2-xTe 3, x = 0.01 and 0.08 show the linear behavior of Hall resistance with sensitivity about 5 Ω/T. And their Hall sensitivity shows weak dependence on temperature. For sensors with high Mn concentration (x = 0.23), the Hall resistance with respect to magnetic field shows a hysteretic behavior. Moreover, its sensitivity shows almostmore » eight times as high as that of the HE sensors with low Mn concentration. The highest sensitivity can reach 43 Ω/T at very low magnetic field. This increase of Hall sensitivity is caused by the occurrence of anomalous HE (AHE) after ferromagnetic phase transition. Our work indicates that the magnetic-element-doped TIs with AHE are good candidates for HE sensors.« less

Magnetometry of micro-magnets with electrostatically defined Hall bars

DOE Office of Scientific and Technical Information (OSTI.GOV)

Lachance-Quirion, Dany; Camirand Lemyre, Julien; Bergeron, Laurent

2015-11-30

Micro-magnets are key components for quantum information processing with individual spins, enabling arbitrary rotations and addressability. In this work, characterization of sub-micrometer sized CoFe ferromagnets is performed with Hall bars electrostatically defined in a two-dimensional electron gas. Due to the ballistic nature of electron transport in the cross junction of the Hall bar, anomalies such as the quenched Hall effect appear near zero external magnetic field, thus hindering the sensitivity of the magnetometer to small magnetic fields. However, it is shown that the sensitivity of the diffusive limit can be almost completely restored at low temperatures using a large currentmore » density in the Hall bar of about 10 A/m. Overcoming the size limitation of conventional etched Hall bars with electrostatic gating enables the measurement of magnetization curves of 440 nm wide micro-magnets with a signal-to-noise ratio above 10{sup 3}. Furthermore, the inhomogeneity of the stray magnetic field created by the micro-magnets is directly measured using the gate-voltage-dependent width of the sensitive area of the Hall bar.« less

78 FR 29762 - Final Flood Hazard Determinations

Federal Register 2010, 2011, 2012, 2013, 2014

2013-05-21

..., Palmetto, GA 30268. City of Roswell City Hall, 38 Hill Street, Suite 235, Roswell, GA 30075. City of Sandy Springs City Hall, 7840 Roswell Road, Building 500, Sandy Springs, GA 30350. City of Union City City Hall...

71. FIRST FLOOR, ROOM 101, ENTRANCE HALL (SIDE WITH FIRE ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

71. FIRST FLOOR, ROOM 101, ENTRANCE HALL (SIDE WITH FIRE DETECTOR), ARCHWAY TO STAIR HALL 100, LOOKING UP, DETAIL OF ARCHWAY SOFFIT. - Octagon House, 1799 (1741) New York Avenue, Northwest, Washington, District of Columbia, DC

Contextual view of ILWU Hall, facing east, with the city ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Contextual view of ILWU Hall, facing east, with the city of Port Hueneme visible in the background - International Longshoremen's & Warehousemen's Union Hall, Naval Civil Engineering Laboratory, Port Hueneme Road, Port Hueneme, Ventura County, CA

DIVA (Data Intensive Architecture)

DTIC Science & Technology

2004-06-01

Itanium-based workstation as a test bench for the larger system concepts. 44 10. Publications [Hall99] M. Hall, P. Kogge, J. Koller, P. Diniz ...White, Dr. Pedro Diniz . Mr. Pablo Moissett • Caltech: Dr. Thomas Sterling, Mr. Daniel Savarese • University of Notre Dame: Dr. Peter Kogge, Dr. Jay...IEEE Computer, April 1995, pp. 23-31. [Hall99] M. Hall, P. Kogge, J. Koller, P. Diniz , J. Chame, J. Draper, J. LaCoss, J. Granacki, J. Brockman

Performance of an 8 kW Hall Thruster

DTIC Science & Technology

2000-01-12

For the purpose of either orbit raising and/or repositioning the Hall thruster must be capable of delivering sufficient thrust to minimize transfer...time. This coupled with the increasing on-board electric power capacity of military and commercial satellites, requires a high power Hall thruster that...development of a novel, high power Hall thruster , capable of efficient operation over a broad range of Isp and thrust. We call such a thruster the bi

Faraday Probe Analysis, Part 2: Evaluation of Facility Effects on Ion Migration in a Hall Thruster Plume (Preprint)

DTIC Science & Technology

2010-02-24

A nested Faraday probe was designed and fabricated to assess facility effects in a systematic study of ion migration in a Hall thruster plume...Current density distributions were studied at 8, 12, 16, and 20 thruster diameters downstream of the Hall thruster exit plane with four probe configurations...measurements are a significant improvement for comparisons with numerical simulations and investigations of Hall thruster performance.

Performance Potential of Plasma Thrusters: Arcjet and Hall Thruster Modeling

DTIC Science & Technology

1993-09-17

FUNDING NUMBERS Performance Potential of Plasma Thrusters: \\ Arcjet and Hall Thruster Modeling FQ 8671-9300908 S ,,G-AFOSR-91-0256 6. AUTHOR(S) Manuel...models for the internal physics and the performance of hydrogen arcjets and Hall thrusters , respectively. These are thought to represent the state of...work. 93-24268 14. SUBJECT TERMS IS. NUMBER OF PAGES Electric Propulsion, Arcjets, Hall Thrusters 15 16. PRICE COOE 17. SECURITY CLASSIFICATION I18

An Inversion Method for Reconstructing Hall Thruster Plume Parameters from the Line Integrated Measurements (Preprint)

DTIC Science & Technology

2007-06-05

From - To) 05-06-2007 Technical Paper 4. TITLE AND SUBTITLE 5a. CONTRACT NUMBER An Inversion Method for Reconstructing Hall Thruster Plume...239.18 An Inversion Method for Reconstructing Hall Thruster Plume Parameters from Line Integrated Measurements (Preprint) Taylor S. Matlock∗ Jackson...dimensional estimate of the plume electron temperature using a published xenon collisional radiative model. I. Introduction The Hall thruster is a high

Comparison of Numerical and Experimental Time-Resolved Near-Field Hall Thruster Plasma Properties

DTIC Science & Technology

2014-03-06

Near-Field Hall Thruster Plasma Properties 5a. CONTRACT NUMBER In-House 5b. GRANT NUMBER 5c. PROGRAM ELEMENT NUMBER 6. AUTHOR(S) 5d...Resolved Near-Field Hall Thruster Plasma Properties Ashley E. Gonzales, Justin W. Koo, and William A. Hargus, Jr. Abstract— Breathing mode oscillations... thruster , HPHall, plume emission. I. INTRODUCTION HALL thrusters are a plasma propulsion technologywidely used due to their low thrust, high specific impulse

Final analysis of proton form factor ratio data at Q 2 = 4.0, 4.8, and 5.6 GeV 2

DOE PAGES

Puckett, A. J. R.; Brash, E. J.; Gayou, O.; ...

2012-04-11

Recently published measurements of the proton electromagnetic form factor ratio R = μ p G E p/G M p at momentum transfers Q 2 up to 8.5 GeV 2 in Jefferson Lab Hall C deviate from the linear trend of previous measurements in Jefferson Lab Hall A, favoring a slower rate of decrease of R with Q 2. While statistically compatible in the region of overlap with Hall A, the Hall C data hint at a systematic difference between the two experiments. This possibility was investigated in a reanalysis of the Hall A data. We find that the original analysismore » underestimated the background in the selection of elastic events. The application of an additional cut to further suppress the background increases the results for R, improving the consistency between Halls A and C.« less

A highly sensitive CMOS digital Hall sensor for low magnetic field applications.

PubMed

Xu, Yue; Pan, Hong-Bin; He, Shu-Zhuan; Li, Li

2012-01-01

Integrated CMOS Hall sensors have been widely used to measure magnetic fields. However, they are difficult to work with in a low magnetic field environment due to their low sensitivity and large offset. This paper describes a highly sensitive digital Hall sensor fabricated in 0.18 μm high voltage CMOS technology for low field applications. The sensor consists of a switched cross-shaped Hall plate and a novel signal conditioner. It effectively eliminates offset and low frequency 1/f noise by applying a dynamic quadrature offset cancellation technique. The measured results show the optimal Hall plate achieves a high current related sensitivity of about 310 V/AT. The whole sensor has a remarkable ability to measure a minimum ± 2 mT magnetic field and output a digital Hall signal in a wide temperature range from -40 °C to 120 °C.

Topological Hall and Spin Hall Effects in Disordered Skyrmionic Textures

NASA Astrophysics Data System (ADS)

Ndiaye, Papa Birame; Akosa, Collins; Manchon, Aurelien; Spintronics Theory Group Team

We carry out a throughout study of the topological Hall and topological spin Hall effects in disordered skyrmionic systems: the dimensionless (spin) Hall angles are evaluated across the energy band structure in the multiprobe Landauer-Büttiker formalism and their link to the effective magnetic field emerging from the real space topology of the spin texture is highlighted. We discuss these results for an optimal skyrmion size and for various sizes of the sample and found that the adiabatic approximation still holds for large skyrmions as well as for few atomic size-nanoskyrmions. Finally, we test the robustness of the topological signals against disorder strength and show that topological Hall effect is highly sensitive to momentum scattering. This work was supported by the King Abdullah University of Science and Technology (KAUST) through the Award No OSR-CRG URF/1/1693-01 from the Office of Sponsored Research (OSR).

Prospect of quantum anomalous Hall and quantum spin Hall effect in doped kagome lattice Mott insulators.

PubMed

Guterding, Daniel; Jeschke, Harald O; Valentí, Roser

2016-05-17

Electronic states with non-trivial topology host a number of novel phenomena with potential for revolutionizing information technology. The quantum anomalous Hall effect provides spin-polarized dissipation-free transport of electrons, while the quantum spin Hall effect in combination with superconductivity has been proposed as the basis for realizing decoherence-free quantum computing. We introduce a new strategy for realizing these effects, namely by hole and electron doping kagome lattice Mott insulators through, for instance, chemical substitution. As an example, we apply this new approach to the natural mineral herbertsmithite. We prove the feasibility of the proposed modifications by performing ab-initio density functional theory calculations and demonstrate the occurrence of the predicted effects using realistic models. Our results herald a new family of quantum anomalous Hall and quantum spin Hall insulators at affordable energy/temperature scales based on kagome lattices of transition metal ions.

G. Stanley Hall and The Journal of Genetic Psychology: A Note.

PubMed

Hogan, John D

2016-01-01

The Journal of Genetic Psychology (originally called The Pedagogical Seminary) has a complicated history. Known primarily as a journal of development psychology, it was originally intended to be a journal of higher education. In addition, G. Stanley Hall created it, at least in part, to curry favor with Jonas Clark, the benefactor of Clark University. The journal had a cumbersome start, with irregular issues for most of its first decade. Hall was a hands-on editor, often contributing articles and reviews as well as the texts of many of his speeches. A substantial number of additional articles were written by Clark University faculty and fellows where Hall was president. After Hall.s death, the editor became Carl Murchison who eventually left Clark University with the journal and continued to publish it privately until his death. Through the years, the journal has been the source for many classic articles in developmental psychology.

Crossover to the anomalous quantum regime in the extrinsic spin Hall effect of graphene

NASA Astrophysics Data System (ADS)

Ferreira, Aires; Milletari, Mirco

Recent reports of spin-orbit coupling enhancement in chemically modified graphene have opened doors to studies of the spin Hall effect with massless chiral fermions. Here, we theoretically investigate the interaction and impurity density dependence of the extrinsic spin Hall effect in spin-orbit coupled graphene. We present a nonperturbative quantum diagrammatic calculation of the spin Hall response function in the strong-coupling regime that incorporates skew scattering and anomalous impurity density-independent contributions on equal footing. The spin Hall conductivity dependence on Fermi energy and electron-impurity interaction strength reveals the existence of experimentally accessible regions where anomalous quantum processes dominate. Our findings suggest that spin-orbit-coupled graphene is an ideal model system for probing the competition between semiclassical and bona fide quantum scattering mechanisms underlying the spin Hall effect. A.F. gratefully acknowledges the financial support of the Royal Society (U.K.).

68. TURBINE HALL, LOOKING DOWN FROM THE CONTROL ROOM INTO ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

68. TURBINE HALL, LOOKING DOWN FROM THE CONTROL ROOM INTO TURBINE HALL AT UNITS 3, 5, AND 2) - Delaware County Electric Company, Chester Station, Delaware River at South end of Ward Street, Chester, Delaware County, PA

Interior view, groundfloor dining hall extending across the rotunda extension ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Interior view, ground-floor dining hall extending across the rotunda extension from it's northern exterior wall to its southern exterior wall, from the north. - U. S. Naval Asylum, Biddle Hall, Gray's Ferry Avenue, Philadelphia, Philadelphia County, PA

Overview of Iodine Propellant Hall Thruster Development Activities at NASA Glenn Research Center

NASA Technical Reports Server (NTRS)

Kamhawi, Hani; Benavides, Gabriel; Haag, Thomas; Hickman, Tyler; Smith, Timothy; Williams, George; Myers, James; Polzin, Kurt; Dankanich, John; Byrne, Larry;

B-periodic oscillations in the Hall-resistance induced by a dc-current-bias under combined microwave-excitation and dc-current bias in the GaAs/AlGaAs 2D system.

PubMed

Liu, Han-Chun; Reichl, C; Wegscheider, W; Mani, R G

2018-05-18

We report the observation of dc-current-bias-induced B-periodic Hall resistance oscillations and Hall plateaus in the GaAs/AlGaAs 2D system under combined microwave radiation- and dc bias excitation at liquid helium temperatures. The Hall resistance oscillations and plateaus appear together with concomitant oscillations also in the diagonal magnetoresistance. The periods of Hall and diagonal resistance oscillations are nearly identical, and source power (P) dependent measurements demonstrate sub-linear relationship of the oscillation amplitude with P over the span 0 < P ≤ 20 mW.

Coherence length saturation at the low temperature limit in two-dimensional hole gas

NASA Astrophysics Data System (ADS)

Shan, Pujia; Fu, Hailong; Wang, Pengjie; Yang, Jixiang; Pfeiffer, L. N.; West, K. W.; Lin, Xi

2018-05-01

The plateau-plateau transition in the integer quantum Hall effect is studied in three Hall bars with different widths. The slopes of the Hall resistance as a function of magnetic field follow the scaling power law as expected in the plateau-plateau transition, and saturate at the low temperature limit. Surprisingly, the saturation temperature is irrelevant with the Hall bar size, which suggests that the saturation of the coherence length is intrinsic.

An Inversion Method for Reconstructing Hall Thruster Plume Parameters from the Line Integrated Measurements (Postprint)

DTIC Science & Technology

2007-07-01

Technical Paper 3. DATES COVERED (From - To) 4. TITLE AND SUBTITLE 5a. CONTRACT NUMBER An Inversion Method for Reconstructing Hall Thruster Plume...298 (Rev. 8-98) Prescribed by ANSI Std. 239.18 An Inversion Method for Reconstructing Hall Thruster Plume Parameters from Line Integrated Measurements... Hall thruster is a high specific impulse electric thruster that produces a highly ionized plasma inside an annular chamber through the use of high

First Firing of a 100-kW Nested-Channel Hall Thruster

DTIC Science & Technology

2013-09-01

Technical Paper 3. DATES COVERED (From - To) September 2013- December 2013 4. TITLE AND SUBTITLE First Firing of a 100-kW Nested-Channel Hall Thruster 5a...STATEMENT A: Approved for public release; distribution unlimited. 1 First Firing of a 100-kW Nested-channel Hall Thruster IEPC-2013-394...converting electrical power to directed kinetic power I. Introduction ESTING the channels of Hall thrusters has proven to be a viable method to increase

Magnetotransport properties of 8-Pmmn borophene: effects of Hall field and strain.

PubMed

Islam, S K Firoz

2018-07-11

The polymorph of 8-Pmmn borophene is an anisotropic Dirac material with tilted Dirac cones at two valleys. The tilting of the Dirac cones at two valleys are in opposite directions, which manifests itself via the valley dependent Landau levels in presence of an in-plane electric field (Hall field). The valley dependent Landau levels cause valley polarized magnetotransport properties in presence of the Hall field, which is in contrast to the monolayer graphene with isotropic non-tilted Dirac cones. The longitudinal conductivity and Hall conductivity are evaluated by using linear response theory in low temperature regime. An analytical approximate form of the longitudinal conductivity is also obtained. It is observed that the tilting of the Dirac cones amplifies the frequency of the longitudinal conductivity oscillation (Shubnikov-de Haas). On the other hand, the Hall conductivity exhibits graphene-like plateaus except the appearance of valley dependent steps which are purely attributed to the Hall field induced lifting of the valley degeneracy in the Landau levels. Finally we look into the different cases when the Hall field is applied to the strained borophene and find that valley dependency is fully dominated by strain rather than Hall field. Another noticeable point is that if the real magnetic field is replaced by the strain induced pseudo magnetic field then the electric field looses its ability to cause valley polarized transport.

A systematic comparison of recurrent event models for application to composite endpoints.

PubMed

Ozga, Ann-Kathrin; Kieser, Meinhard; Rauch, Geraldine

2018-01-04

Many clinical trials focus on the comparison of the treatment effect between two or more groups concerning a rarely occurring event. In this situation, showing a relevant effect with an acceptable power requires the observation of a large number of patients over a long period of time. For feasibility issues, it is therefore often considered to include several event types of interest, non-fatal or fatal, and to combine them within a composite endpoint. Commonly, a composite endpoint is analyzed with standard survival analysis techniques by assessing the time to the first occurring event. This approach neglects that an individual may experience more than one event which leads to a loss of information. As an alternative, composite endpoints could be analyzed by models for recurrent events. There exists a number of such models, e.g. regression models based on count data or Cox-based models such as the approaches of Andersen and Gill, Prentice, Williams and Peterson or, Wei, Lin and Weissfeld. Although some of the methods were already compared within the literature there exists no systematic investigation for the special requirements regarding composite endpoints. Within this work a simulation-based comparison of recurrent event models applied to composite endpoints is provided for different realistic clinical trial scenarios. We demonstrate that the Andersen-Gill model and the Prentice- Williams-Petersen models show similar results under various data scenarios whereas the Wei-Lin-Weissfeld model delivers effect estimators which can considerably deviate under commonly met data scenarios. Based on the conducted simulation study, this paper helps to understand the pros and cons of the investigated methods in the context of composite endpoints and provides therefore recommendations for an adequate statistical analysis strategy and a meaningful interpretation of results.

Resonant Hall effect under generation of a self-sustaining mode of spin current in nonmagnetic bipolar conductors with identical characters between holes and electrons

NASA Astrophysics Data System (ADS)

Sakai, Masamichi; Takao, Hiraku; Matsunaga, Tomoyoshi; Nishimagi, Makoto; Iizasa, Keitaro; Sakuraba, Takahito; Higuchi, Koji; Kitajima, Akira; Hasegawa, Shigehiko; Nakamura, Osamu; Kurokawa, Yuichiro; Awano, Hiroyuki

2018-03-01

We have proposed an enhancement mechanism of the Hall effect, the signal of which is amplified due to the generation of a sustaining mode of spin current. Our analytic derivations of the Hall resistivity revealed the conditions indispensable for the observation of the effect: (i) the presence of the transverse component of an effective electric field due to spin splitting in chemical potential in addition to the longitudinal component; (ii) the simultaneous presence of holes and electrons each having approximately the same characteristics; (iii) spin-polarized current injection from magnetized electrodes; (iv) the boundary condition for the transverse current (J c, y = 0). The model proposed in this study was experimentally verified by using van der Pauw-type Hall devices consisting of the nonmagnetic bipolar conductor YH x (x ≃ 2) and TbFeCo electrodes. Replacing Au electrodes with TbFeCo electrodes alters the Hall resistivity from the ordinary Hall effect to the anomalous Hall-like effect with an enhancement factor of approximately 50 at 4 T. We interpreted the enhancement phenomenon in terms of the present model.

Spin torque efficiency of Ta, W, and Pt in metallic bilayers evaluated by harmonic Hall and spin Hall magnetoresistance measurements

NASA Astrophysics Data System (ADS)

Lau, Yong-Chang; Hayashi, Masamitsu

2017-08-01

We investigate the efficiency of current-induced torque, i.e., the spin torque efficiency, in in-plane magnetized heavy metal/CoFeB/MgO heterostructures (heavy metals = Pt, W, and Ta) using the harmonic Hall technique and the spin Hall magnetoresistance. We find that the amplitude of the external magnetic field has a strong influence on the spin torque efficiency evaluation by the harmonic Hall measurements. This can be corrected by measuring the corresponding Hall resistance susceptibility. The sign and magnitude of the resulting Slonczewski-like spin torque efficiencies are in agreement with previous reports and the measurements utilizing the spin Hall magnetoresistance, except for the Pt underlayer films. The origin of the discrepancy for the Pt underlayer films is unclear. The field like torque efficiencies, upon subtracting the Oersted field contribution, are quite low or negligible. This is in significant contrast to what has been found for the field like torque in heterostructures with perpendicular magnetization. These results suggest that a more advanced model is required in order to describe accurately spin transport and momentum transfer at metallic interfaces.

The role of the men's hall in the development of the Anglo-Saxon superego.

PubMed

Earl, J W

1983-05-01

This paper is a historical study of ritual space--a bit of psychoanalytic anthropology applied to a particular case, the evolution of the men's hall among the early Anglo-Saxons. I focus particularly on the ritual functions of poetry in the hall, the same poetry which is our major evidence regarding the hall, especially the epic Beowulf. I define the hall as a cultural institution, and redefine the native poetic tradition in relation to the hall's varied ritual life, with which the poetry is so occupied. Though my argument is focused on the hall, it includes a framework of theoretical concerns. Early Anglo-Saxon culture is of anthropological interest chiefly because of its rapid and dramatic emergence from Germanic tribal prehistory into a leading role in the civilization of Christian Europe. The conquest of Britain by the Anglo-Saxons in the fifth and sixth centuries, and their conversion soon afterward, is a case history of the transformations of a tribal society suddenly introduced to the special forces of civilization and the higher religions that control them. The Anglo-Saxons are fascinating in this regard because of the fortuitous developments that prepared for this transformation and made it so successful.

Star Formation and the Hall Effect

NASA Astrophysics Data System (ADS)

Braiding, Catherine

2011-10-01

Magnetic fields play an important role in star formation by regulating the removal of angular momentum from collapsing molecular cloud cores. Hall diffusion is known to be important to the magnetic field behaviour at many of the intermediate densities and field strengths encountered during the gravitational collapse of molecular cloud cores into protostars, and yet its role in the star formation process is not well-studied. This thesis describes a semianalytic self-similar model of the collapse of rotating isothermal molecular cloud cores with both Hall and ambipolar diffusion, presenting similarity solutions that demonstrate that the Hall effect has a profound influence on the dynamics of collapse. ... Hall diffusion also determines the strength of the magnetic diffusion and centrifugal shocks that bound the pseudo and rotationally-supported discs, and can introduce subshocks that further slow accretion onto the protostar. In cores that are not initially rotating Hall diffusion can even induce rotation, which could give rise to disc formation and resolve the magnetic braking catastrophe. The Hall effect clearly influences the dynamics of gravitational collapse and its role in controlling the magnetic braking and radial diffusion of the field would be worth exploring in future numerical simulations of star formation.

Concert halls with strong and lateral sound increase the emotional impact of orchestra music.

PubMed

Pätynen, Jukka; Lokki, Tapio

2016-03-01

An audience's auditory experience during a thrilling and emotive live symphony concert is an intertwined combination of the music and the acoustic response of the concert hall. Music in itself is known to elicit emotional pleasure, and at best, listening to music may evoke concrete psychophysiological responses. Certain concert halls have gained a reputation for superior acoustics, but despite the continuous research by a multitude of objective and subjective studies on room acoustics, the fundamental reason for the appreciation of some concert halls remains elusive. This study demonstrates that room acoustic effects contribute to the overall emotional experience of a musical performance. In two listening tests, the subjects listen to identical orchestra performances rendered in the acoustics of several concert halls. The emotional excitation during listening is measured in the first experiment, and in the second test, the subjects assess the experienced subjective impact by paired comparisons. The results showed that the sound of some traditional rectangular halls provides greater psychophysiological responses and subjective impact. These findings provide a quintessential explanation for these halls' success and reveal the overall significance of room acoustics for emotional experience in music performance.

A holographic model for the fractional quantum Hall effect

NASA Astrophysics Data System (ADS)

Lippert, Matthew; Meyer, René; Taliotis, Anastasios

2015-01-01

Experimental data for fractional quantum Hall systems can to a large extent be explained by assuming the existence of a Γ0(2) modular symmetry group commuting with the renormalization group flow and hence mapping different phases of two-dimensional electron gases into each other. Based on this insight, we construct a phenomenological holographic model which captures many features of the fractional quantum Hall effect. Using an -invariant Einstein-Maxwell-axio-dilaton theory capturing the important modular transformation properties of quantum Hall physics, we find dyonic diatonic black hole solutions which are gapped and have a Hall conductivity equal to the filling fraction, as expected for quantum Hall states. We also provide several technical results on the general behavior of the gauge field fluctuations around these dyonic dilatonic black hole solutions: we specify a sufficient criterion for IR normalizability of the fluctuations, demonstrate the preservation of the gap under the action, and prove that the singularity of the fluctuation problem in the presence of a magnetic field is an accessory singularity. We finish with a preliminary investigation of the possible IR scaling solutions of our model and some speculations on how they could be important for the observed universality of quantum Hall transitions.

External electric field driven modification of the anomalous and spin Hall conductivities in Fe thin films on MgO(001)

NASA Astrophysics Data System (ADS)

Pradipto, Abdul-Muizz; Akiyama, Toru; Ito, Tomonori; Nakamura, Kohji

2018-01-01

The effects of applying external electric fields to the anomalous and spin Hall conductivities in Fe thin-film models with different layer thicknesses on MgO(001) are investigated by using first-principles calculations. We observe that, for the considered systems, the application of positive electric field associated with the accumulation of negative charges on the Fe side generally decreases (increases) the anomalous (spin) Hall conductivities. The mapping of the Hall conductivities within the two-dimensional Brillouin zone shows that the electric-field-induced modifications are related to the modification of the band structures of the atoms at the interface with the MgO substrate. In particular, the external electric field affects the Hall conductivities via the modifications of the dx z,dy z orbitals, in which the application of positive electric field pushes the minority-spin states of the dx z,dy z bands closer to the Fermi level. Better agreement with the anomalous Hall conductivity for bulk Fe and a more realistic scenario for the electric field modification of Hall conductivities are obtained by using the thicker layers of Fe on MgO (Fe3/MgO and Fe5/MgO).

Observation of a superfluid Hall effect

PubMed Central

Jiménez-García, Karina; Williams, Ross A.; Beeler, Matthew C.; Perry, Abigail R.; Phillips, William D.; Spielman, Ian B.

2012-01-01

Measurement techniques based upon the Hall effect are invaluable tools in condensed-matter physics. When an electric current flows perpendicular to a magnetic field, a Hall voltage develops in the direction transverse to both the current and the field. In semiconductors, this behavior is routinely used to measure the density and charge of the current carriers (electrons in conduction bands or holes in valence bands)—internal properties of the system that are not accessible from measurements of the conventional resistance. For strongly interacting electron systems, whose behavior can be very different from the free electron gas, the Hall effect’s sensitivity to internal properties makes it a powerful tool; indeed, the quantum Hall effects are named after the tool by which they are most distinctly measured instead of the physics from which the phenomena originate. Here we report the first observation of a Hall effect in an ultracold gas of neutral atoms, revealed by measuring a Bose–Einstein condensate’s transport properties perpendicular to a synthetic magnetic field. Our observations in this vortex-free superfluid are in good agreement with hydrodynamic predictions, demonstrating that the system’s global irrotationality influences this superfluid Hall signal. PMID:22699494

12. BUILDING 324, INTERIOR, ENTRY HALL AND STAIRWAY, FROM SOUTH ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

12. BUILDING 324, INTERIOR, ENTRY HALL AND STAIRWAY, FROM SOUTH ENTRY, LOOKING NORTH, WITH HALL LEADING TO GARAGE TO RIGHT OF STAIRWAY. - Oakland Naval Supply Center, Commanding Officers Residences, Between E & F Streets, West of Fourth Street, Oakland, Alameda County, CA

76 FR 53021 - Public Hearing and Commission Meeting

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-24

... Water Supply System, Halls Cross Roads District, Harford County, Md. Modification to conditions of the... Baltimore. Project Facility: Maryland Water Supply System, Halls Cross Roads District, Harford County, Md... Facility: Maryland Water Supply System, Halls Cross Roads District, Harford County, Md. Modification to...

24. BEDROOM #1 INTERIOR SHOWING OPEN DOOR TO HALL WITH ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

24. BEDROOM #1 INTERIOR SHOWING OPEN DOOR TO HALL WITH HALL LINEN CLOSETS VISIBLE IN BACKGROUND, AND PARTIALLY OPEN DOOR TO CLOSET. VIEW TO EAST. - Big Creek Hydroelectric System, Powerhouse 8, Operator Cottage, Big Creek, Big Creek, Fresno County, CA

KENNEDY SPACE CENTER, FLA. The Astronaut Hall of Fame is dedicated to telling the stories of America’s astronauts. It features the world’s largest collection of personal astronaut mementos plus historic spacecrafts and training simulators. The Hall of Fame is part of the KSC Visitor Complex.

NASA Image and Video Library

2003-07-22

KENNEDY SPACE CENTER, FLA. The Astronaut Hall of Fame is dedicated to telling the stories of America’s astronauts. It features the world’s largest collection of personal astronaut mementos plus historic spacecrafts and training simulators. The Hall of Fame is part of the KSC Visitor Complex.

Comparisons and Evaluation of Hall Thruster Models

DTIC Science & Technology

2002-03-20

COVERED (FROM - TO) 20-04-2001 to 20-04-2002 4. TITLE AND SUBTITLE comparisons and Evaluation of Hall Thruster Models Unclassified 5a. CONTRACT NUMBER...TITLE AND SUBTITLE Comparisons and Evaluation of Hall Thruster Models 5c. PROGRAM ELEMENT NUMBER 5d. PROJECT NUMBER 5d. TASK NUMBER 6. AUTHOR(S...evaluation of Hall thruster models G. J. M. Hagelaar, J. Bareilles, L. Garrigues, and J.-P. Boeuf CPAT, Bâtiment 3R2, Université Paul Sabatier 118 Route

Observations of Hall Reconnection Physics Far Downstream of the X Line.

PubMed

Mistry, R; Eastwood, J P; Haggerty, C C; Shay, M A; Phan, T D; Hietala, H; Cassak, P A

2016-10-28

Observations made using the Wind spacecraft of Hall magnetic fields in solar wind reconnection exhausts are presented. These observations are consistent with the generation of Hall fields by a narrow ion inertial scale current layer near the separatrix, which is confirmed with an appropriately scaled particle-in-cell simulation that shows excellent agreement with observations. The Hall fields are observed thousands of ion inertial lengths downstream from the reconnection X line, indicating that narrow regions of kinetic dynamics can persist extremely far downstream.

Magnet/Hall-Effect Random-Access Memory

NASA Technical Reports Server (NTRS)

Wu, Jiin-Chuan; Stadler, Henry L.; Katti, Romney R.

1991-01-01

In proposed magnet/Hall-effect random-access memory (MHRAM), bits of data stored magnetically in Perm-alloy (or equivalent)-film memory elements and read out by using Hall-effect sensors to detect magnetization. Value of each bit represented by polarity of magnetization. Retains data for indefinite time or until data rewritten. Speed of Hall-effect sensors in MHRAM results in readout times of about 100 nanoseconds. Other characteristics include high immunity to ionizing radiation and storage densities of order 10(Sup6)bits/cm(Sup 2) or more.

The Hall effect in star formation

NASA Astrophysics Data System (ADS)

Braiding, C. R.; Wardle, M.

2012-05-01

Magnetic fields play an important role in star formation by regulating the removal of angular momentum from collapsing molecular cloud cores. Hall diffusion is known to be important to the magnetic field behaviour at many of the intermediate densities and field strengths encountered during the gravitational collapse of molecular cloud cores into protostars, and yet its role in the star formation process is not well studied. We present a semianalytic self-similar model of the collapse of rotating isothermal molecular cloud cores with both Hall and ambipolar diffusion, and similarity solutions that demonstrate the profound influence of the Hall effect on the dynamics of collapse. The solutions show that the size and sign of the Hall parameter can change the size of the protostellar disc by up to an order of magnitude and the protostellar accretion rate by 50 per cent when the ratio of the Hall to ambipolar diffusivities is varied between -0.5 ≤ηH/ηA≤ 0.2. These changes depend upon the orientation of the magnetic field with respect to the axis of rotation and create a preferred handedness to the solutions that could be observed in protostellar cores using next-generation instruments such as ALMA. Hall diffusion also determines the strength and position of the shocks that bound the pseudo and rotationally supported discs, and can introduce subshocks that further slow accretion on to the protostar. In cores that are not initially rotating (not examined here), Hall diffusion can even induce rotation, which could give rise to disc formation and resolve the magnetic braking catastrophe. The Hall effect clearly influences the dynamics of gravitational collapse and its role in controlling the magnetic braking and radial diffusion of the field merits further exploration in numerical simulations of star formation.

Role of ionization and electron drift velocity profile to Rayleigh instability in a Hall thruster plasma

DOE Office of Scientific and Technical Information (OSTI.GOV)

Singh, Sukhmander; Malik, Hitendra K.

Role of ionization to Rayleigh instability is clarified in a Hall thruster plasma under the variety of profiles of electron drift velocity, namely, step-like profile (SLP) and two different super-Gaussian profiles (SGP1 and SGP2). For this, a relevant Rayleigh equation is derived and solved numerically using fourth-order Runge-Kutta method. Interestingly, an upper cutoff frequency of oscillations {omega}{sub max} is realized for the occurrence of the instability that shows dependence on the ionization rate {alpha}, electron drift velocity u{sub 0}, electron cyclotron frequency {Omega}, azimuthal wave number k{sub y}, plasma density n{sub 0}, density gradient {partial_derivative}n{sub 0}/{partial_derivative}x, ion (electron) thermal speedmore » V{sub thI}(V{sub thE}), and ion (electron) plasma frequency {omega}{sub pi}({omega}{sub pe}). The frequency {omega}{sub max} follows the trend {omega}{sub max} (for SGP2) >{omega}{sub max} (for SLP) >{omega}{sub max} (for SGP1) and shows a similar behaviour with ionization for all types of the velocity profiles. The instability is found to grow faster for the higher {alpha} and the ion temperature but it acquires lower rate under the effect of the higher electron temperature; the perturbed potential also varies in accordance with the growth rate. The electron temperature influences the growth rate and cutoff frequency less significantly in comparison with the ion temperature.« less

Correlation between non-Fermi-liquid behavior and superconductivity in (Ca, La)(Fe,Co)As2 iron arsenides: A high-pressure study

NASA Astrophysics Data System (ADS)

Zhou, W.; Ke, F.; Xu, Xiaofeng; Sankar, R.; Xing, X.; Xu, C. Q.; Jiang, X. F.; Qian, B.; Zhou, N.; Zhang, Y.; Xu, M.; Li, B.; Chen, B.; Shi, Z. X.

2017-11-01

Non-Fermi-liquid (NFL) phenomena associated with correlation effects have been widely observed in the phase diagrams of unconventional superconducting families. Exploration of the correlation between the normal state NFL, regardless of its microscopic origins, and the superconductivity has been argued as a key to unveiling the mystery of the high-Tc pairing mechanism. Here we systematically investigate the pressure-dependent in-plane resistivity (ρ ) and Hall coefficient (RH) of a high-quality 112-type Fe-based superconductor Ca1 -xLaxFe1 -yCoyAs2 (x =0.2 ,y =0.02 ). With increasing pressure, the normal-state resistivity of the studied sample exhibits a pronounced crossover from non-Fermi-liquid to Fermi-liquid behaviors. Accompanied with this crossover, Tc is gradually suppressed. In parallel, the extremum in the Hall coefficient RH(T ) curve, possibly due to anisotropic scattering induced by spin fluctuations, is also gradually suppressed. The symbiosis of NFL and superconductivity implies that these two phenomena are intimately related. Further study on the pressure-dependent upper critical field reveals that the two-band effects are also gradually weakened with increasing pressure and reduced to the one-band Werthamer-Helfand-Hohenberg limit in the low-Tc regime. Overall, our paper supports the picture that NFL, multigap, and extreme RH(T ) are all of the same magnetic origin, i.e., the spin fluctuations in the 112 iron arsenide superconductors.

Irradiation tests of ITER candidate Hall sensors using two types of neutron spectra.

PubMed

Ďuran, I; Bolshakova, I; Viererbl, L; Sentkerestiová, J; Holyaka, R; Lahodová, Z; Bém, P

2010-10-01

We report on irradiation tests of InSb based Hall sensors at two irradiation facilities with two distinct types of neutron spectra. One was a fission reactor neutron spectrum with a significant presence of thermal neutrons, while another one was purely fast neutron field. Total neutron fluence of the order of 10(16) cm(-2) was accumulated in both cases, leading to significant drop of Hall sensor sensitivity in case of fission reactor spectrum, while stable performance was observed at purely fast neutron spectrum. This finding suggests that performance of this particular type of Hall sensors is governed dominantly by transmutation. Additionally, it further stresses the need to test ITER candidate Hall sensors under neutron flux with ITER relevant spectrum.

Redistributing Chern numbers and quantum Hall transitions in multi-band lattices

NASA Astrophysics Data System (ADS)

Yu, H. L.; Zhai, Z. Y.; Jiang, C.

2018-07-01

We numerically study the integer quantum Hall effect (IQHE) on m-band lattices. With continuous modulating the next-nearest-neighbor hopping integral t' , it is found that the full band is divided into 2 m - 1 regions. There are m - 1 critical regions with pseudogaps induced by the merging between the two adjacent subbands, where both Chern numbers of the correlating Landau subbands and the corresponding Hall plateau are not well-defined. The other m regions with different well-defined Chern numbers are separated by the above m - 1 critical regions. Due to the redistributing Chern numbers of system induced by the merging of subbands, the Hall conductance exhibits a peculiar phase transition, which is characterized by the direct change of Hall plateau state.

Effect of azimuthal diversion rail on an ATON-type Hall thruster

NASA Astrophysics Data System (ADS)

Xu, Zhang; Liqiu, Wei; Liang, Han; Yongjie, Ding; Daren, Yu

2017-03-01

A newly designed azimuthal diversion rail (ADR) is studied and used to enhance the ionization process in an ATON-type Hall thruster. The diversion rail efficiently reduces the neutral flow axial velocity, and hence, increases the resistance time of atoms in the discharge channel of the Hall thruster. Thrust performances, in terms of thrust, anode efficiency and ion beam divergence, are found to be improved because of the application of the diversion rail, especially at low mass flow rate conditions. Experiment results reveal that the ADR increases the mass utilization under insufficient mass flow rate operating conditions. The design of the ADR broadens the efficient operating range of Hall thrusters and has significant contribution to multi-mode Hall thruster development.

What do you measure when you measure the Hall effect?

NASA Astrophysics Data System (ADS)

Koon, D. W.; Knickerbocker, C. J.

1993-02-01

A formalism for calculating the sensitivity of Hall measurements to local inhomogeneities of the sample material or the magnetic field is developed. This Hall weighting function g(x,y) is calculated for various placements of current and voltage probes on square and circular laminar samples. Unlike the resistivity weighting function, it is nonnegative throughout the entire sample, provided all probes lie at the edge of the sample. Singularities arise in the Hall weighting function near the current and voltage probes except in the case where these probes are located at the corners of a square. Implications of the results for cross, clover, and bridge samples, and the implications of our results for metal-insulator transition and quantum Hall studies are discussed.

Overview of Iodine Propellant Hall Thruster Development Activities at NASA Glenn Research Center

NASA Technical Reports Server (NTRS)

Kamhawi, Hani; Haag, Thomas; Benavides, Gabriel; Hickman, Tyler; Smith, Timothy; Williams, George; Myers, James; Polzin, Kurt; Dankanich, John; Byrne, Larry;

Concert hall acoustics: Repertoire, listening position, and individual taste of the listeners influence the qualitative attributes and preferences.

PubMed

Lokki, Tapio; Pätynen, Jukka; Kuusinen, Antti; Tervo, Sakari

2016-07-01

Some studies of concert hall acoustics consider the acoustics in a hall as a single entity. Here, it is shown that the acoustics vary between different seats, and the choice of music also influences the perceived acoustics. The presented study compared the acoustics of six unoccupied concert halls with extensive listening tests, applying two different music excerpts on three different seats. Twenty eight assessors rated the halls according to the subjective preference of the assesors and individual attributes with a paired comparison method. Results show that assessors can be classified into two preference groups, which prioritize different perceptual factors. In addition, the individual attributes elicited by assessors were clustered into three latent classes.

Residence Hall Seating That Works.

ERIC Educational Resources Information Center

Wiens, Janet

2003-01-01

Describes the seating chosen for residence halls at the Massachusetts Institute of Technology and the University of New England. The seating required depends on ergonomics, aesthetics, durability, cost, and code requirements. In addition, residence halls must have a range of seating types to accommodate various uses. (SLD)

Non-Intrusive, Time-Resolved Hall Thruster Near-Field Electron Temperature Measurements

DTIC Science & Technology

2011-08-01

With the growing interest in Hall thruster technology, comes the need to fully characterize the plasma dynamics that determine performance. Of...instabilities characteristic of Hall thruster behavior, time resolved techniques must be developed. This study presents a non-intrusive method of

Fundamental Studies of the Electrode Regions in Arcjet Thrusters

DTIC Science & Technology

1998-03-01

Hall thruster . This contributed to a comprehensive study of the near exit region of our Hall discharge device. To compliment the LIF diagnostics on our Hall thrusters, we have made extensive measurements of the transient and time average plasma properties using conventional electrostatic

Astronaut Hall of Fame

NASA Image and Video Library

2018-04-21

Inside the Space Shuttle Atlantis attraction at NASA’s Kennedy Space Center Visitor Complex in Florida, two space explorers, Scott D. Altman, second from left, and Thomas D. Jones, Ph.D., far right, are inducted into the U.S. Astronaut Hall of Fame Class of 2018. At far left is Hall of Famer Curt Brown, board chairman, Astronaut Scholarship Foundation, who inducted Altman and Jones into the AHOF. Second from right is Hall of Famer John Grunsfeld, who spoke on behalf of Altman during the ceremony. Inductees into the Hall of Fame are selected by a committee of Hall of Fame astronauts, former NASA officials, flight directors, historians and journalists. The process is administered by the Astronaut Scholarship Foundation. To be eligible, an astronaut must have made his or her first flight at least 17 years before the induction. Candidates must be a U.S. citizen and a NASA-trained commander, pilot or mission specialist who has orbited the earth at least once. Including Altman and Jones, 97 astronauts have been inducted into the AHOF.

Air temperature gradient in large industrial hall

NASA Astrophysics Data System (ADS)

Karpuk, Michał; Pełech, Aleksander; Przydróżny, Edward; Walaszczyk, Juliusz; Szczęśniak, Sylwia

2017-11-01

In the rooms with dominant sensible heat load, volume airflow depends on many factors incl. pre-established temperature difference between exhaust and supply airflow. As the temperature difference is getting higher, airflow volume drops down, consequently, the cost of AHU is reduced. In high industrial halls with air exhaust grids located under the ceiling additional temperature gradient above working zone should be taken into consideration. In this regard, experimental research of the vertical air temperature gradient in high industrial halls were carried out for the case of mixing ventilation system The paper presents the results of air temperature distribution measurements in high technological hall (mechanically ventilated) under significant sensible heat load conditions. The supply airflow was delivered to the hall with the help of the swirl diffusers while exhaust grids were located under the hall ceiling. Basing on the air temperature distribution measurements performed on the seven pre-established levels, air temperature gradient in the area between 2.0 and 7.0 m above the floor was calculated and analysed.

Approaching quantum anomalous Hall effect in proximity-coupled YIG/graphene/h-BN sandwich structure

NASA Astrophysics Data System (ADS)

Tang, Chi; Cheng, Bin; Aldosary, Mohammed; Wang, Zhiyong; Jiang, Zilong; Watanabe, K.; Taniguchi, T.; Bockrath, Marc; Shi, Jing

2018-02-01

Quantum anomalous Hall state is expected to emerge in Dirac electron systems such as graphene under both sufficiently strong exchange and spin-orbit interactions. In pristine graphene, neither interaction exists; however, both interactions can be acquired by coupling graphene to a magnetic insulator as revealed by the anomalous Hall effect. Here, we show enhanced magnetic proximity coupling by sandwiching graphene between a ferrimagnetic insulator yttrium iron garnet (YIG) and hexagonal-boron nitride (h-BN) which also serves as a top gate dielectric. By sweeping the top-gate voltage, we observe Fermi level-dependent anomalous Hall conductance. As the Dirac point is approached from both electron and hole sides, the anomalous Hall conductance reaches ¼ of the quantum anomalous Hall conductance 2e2/h. The exchange coupling strength is determined to be as high as 27 meV from the transition temperature of the induced magnetic phase. YIG/graphene/h-BN is an excellent heterostructure for demonstrating proximity-induced interactions in two-dimensional electron systems.

Remnant Geometric Hall Response in a Quantum Quench.

PubMed

Wilson, Justin H; Song, Justin C W; Refael, Gil

2016-12-02

Out-of-equilibrium systems can host phenomena that transcend the usual restrictions of equilibrium systems. Here, we unveil how out-of-equilibrium states, prepared via a quantum quench in a two-band system, can exhibit a nonzero Hall-type current-a remnant Hall response-even when the instantaneous Hamiltonian is time reversal symmetric (in contrast to equilibrium Hall currents). Interestingly, the remnant Hall response arises from the coherent dynamics of the wave function that retain a remnant of its quantum geometry postquench, and can be traced to processes beyond linear response. Quenches in two-band Dirac systems are natural venues for realizing remnant Hall currents, which exist when either mirror or time-reversal symmetry are broken (before or after the quench). Its long time persistence, sensitivity to symmetry breaking, and decoherence-type relaxation processes allow it to be used as a sensitive diagnostic of the complex out-of-equilibrium dynamics readily controlled and probed in cold-atomic optical lattice experiments.

View looks northeast (44°) across concrete foundation for Second Street ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

View looks northeast (44°) across concrete foundation for Second Street Mess Hall. See HAER photo CA-170-Q-3 for view of Mess Hall building - Edwards Air Force Base, North Base, Second Street Mess Hall T-10, Second Street, Boron, Kern County, CA

78 FR 20341 - Proposed Flood Hazard Determinations

Federal Register 2010, 2011, 2012, 2013, 2014

2013-04-04

... sciences established to review conflicting scientific and technical data and provide recommendations for... of Bolton Town Hall, 663 Main Street, Bolton, MA 01740. Town of Boxborough Town Hall, 29 Middle Road... South School Street, Mayville, WI 53050. City of Watertown City Hall, 106 Jones Street, Watertown, WI...

Contextual view of the Hall of Transportation from Yerba Buena ...

Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

Contextual view of the Hall of Transportation from Yerba Buena Island, showing Palace of Fine and Decorative Arts (Building 3) at far right, camera facing northwest - Golden Gate International Exposition, Hall of Transportation, 440 California Avenue, Treasure Island, San Francisco, San Francisco County, CA

Plasma Properties in the Plume of a Hall Thruster Cluster

DTIC Science & Technology

2003-06-04

The Hall thruster cluster is an attractive propulsion approach for spacecraft requiring very high-power electric propulsion systems. This article...probes in the plume of a low-power, four-engine Hall thruster cluster. Simple analytical formulas are introduced that allow these quantities to be

The contribution of weathering of the main Alpine rivers on the global carbon cycle

NASA Astrophysics Data System (ADS)

Donnini, Marco; Probst, Jean-Luc; Probst, Anne; Frondini, Francesco; Marchesini, Ivan; Guzzetti, Fausto

2013-04-01

On geological time-scales the carbon fluxes from the solid Earth to the atmosphere mainly result from volcanism and metamorphic-decarbonation processes, whereas the carbon fluxes from atmosphere to solid Earth mainly depend on weathering of silicates and carbonates, biogenic precipitation and removal of CaCO3 in the oceans and volcanic gases - seawater interactions. Quantifying each contribution is critical. In this work, we estimate the atmospheric CO2 uptake by weathering in the Alps, using results of the study of the dissolved loads transported by 33 main Alpine rivers. The chemical composition of river water in unpolluted areas is a good indicator of surface weathering processes (Garrels and Mackenzie, 1971; Drever, 1982; Meybeck, 1984; Tardy, 1986; Berner and Berner, 1987; Probst et al., 1994). The dissolved load of streams originates from atmospheric input, pollution, evaporite dissolution, and weathering of carbonate and silicate rocks, and the application of mass balance calculations allows quantification of the different contributions. In this work, we applied the MEGA (Major Element Geochemical Approach) geochemical code (Amiotte Suchet, 1995; Amiotte Suchet and Probst, 1996) to the chemical compositions of the selected rivers in order to quantify the atmospheric CO2 consumed by weathering in Alpine region. The drainage basins of the main Alpine rivers were sampled near the basin outlets during dry and flood seasons. The application of the MEGA geochemical consisted in several steps. First, we subtracted the rain contribution in river waters knowing the X/Cl (X = Na, K, Mg, Ca) ratios of the rain. Next, we considered that all (Na+K) came from silicate weathering. The average molar ratio Rsil = (Na+K)/(Ca+Mg) for rivers draining silicate terrains was estimated from unpolluted French stream waters draining small monolithological basins (Meybeck, 1986; 1987). For the purpose, we prepared a simplified geo-lithological map of Alps according to the lithological classification of Meybeck (1986, 1987). Then for each basin we computed Rsil weighted average considering the surface and the mean precipitation for the surface area of each lithology. Lastly, we estimated the (Ca+Mg) originating from carbonate weathering as the remaining cations after silicate correction. Depending on time-scales of the phenomena (shorter than about 1 million year i.e., correlated to the short term carbon cycle, or longer than about 1 million years i.e., correlated to the long-term carbon cycle), we considered different equations for the quantification of the atmospheric CO2 consumed by weathering (Huh, 2010). The results show the net predominance of carbonate weathering on fixing atmospheric CO2 and that, considering the long-term carbon cycle, the amount of atmospheric CO2 uptake by weathering is about one order of magnitude lower than considering the short-term carbon cycle. Moreover, considering the short-term carbon cycle, the mean CO2 consumed by Alpine basins is of the same order of magnitude of the mean CO2 consumed by weathering by the 60 largest rivers of the world estimated by Gaillardet et al. (1999). References Amiotte-Suchet, P. "Cycle Du Carbone, Érosion Chimique Des Continents Et Transfert Vers Les Océans." Sci. Géol. Mém. Strasbourg 97 (1995): 156. Amiotte-Suchet, P., and J.-L. Probst. "Origins of dissolved inorganic carbon in the Garonne river waters: seasonal and interannual variations." Sci. Géologiques Bull. Strasbourg 49, no. 1-4 (1996): 101-126. Berner, E.K., and R.A. Berner. The Global Water Cycle. Geochemistry and Environment. Prentice Halle. Engelwood Cliffs, NJ, 1987. Drever, J.L. The Geochemistry of Natural Waters. Prentice Hall, 1982. Gaillardet, J., B. Dupré, P. Louvat, and C.J. Allègre. "Global Silicate Weathering and CO2 Consumption Rates Deduced from the Chemistry of Large Rivers." Chemical Geology 159 (1999): 3-30. Garrels, R.M., and F.T. Mackenzie. Evolution of Sedimentary Rocks. New York: W.W. Nortonand, 1971. Huh, Y. "Estimation of Atmospheric CO2 Uptake by Silicate Weathering in the Himalayas and the Tibetan Plateau: a Review of Existing Fluvial Geochemical Data." In Monsoon Evolution and Tectonics-Climate Linkage in Asia, 129-151. Geological Society of London, Special Publications. 342. London, 2010. Meybeck, M. "Composition Chimique Naturelle Des Ruisseaux Non Pollués En France." Bullettin De La Société Géologique 39 (1986): 3-77. Meybeck, M. "Global Chemical Weathering of Surficial Rocks Estimated from River Dissolved Load." Am. J. Sci 287 (1987): 401-428. Probst J.L., Mortatti J. And Tardy Y. 1994- Carbon river fluxes and global weathering CO2 consumption in the Congo and Amazon river basins. Applied Geochemistry, 9, p 1-13 Tardy, Y. Le Cycle De l'Eau. Climats, Paléoclimates Et Géochimie Globale. Masson. Paris, 1986.

A minimum distance estimation approach to the two-sample location-scale problem.

PubMed

Zhang, Zhiyi; Yu, Qiqing

2002-09-01

As reported by Kalbfleisch and Prentice (1980), the generalized Wilcoxon test fails to detect a difference between the lifetime distributions of the male and female mice died from Thymic Leukemia. This failure is a result of the test's inability to detect a distributional difference when a location shift and a scale change exist simultaneously. In this article, we propose an estimator based on the minimization of an average distance between two independent quantile processes under a location-scale model. Large sample inference on the proposed estimator, with possible right-censorship, is discussed. The mouse leukemia data are used as an example for illustration purpose.

20th Annual Residence Hall Construction Report

ERIC Educational Resources Information Center

Agron, Joe

2009-01-01

Even in difficult economic times, colleges and universities continue to invest in residence hall construction projects as a way to attract new students and keep existing ones on campus. According to data from "American School & University"'s 20th annual Residence Hall Construction Report, the median new project completed in 2008 was…

Adaptive Reuse: Reusing Buildings for Future Generations while Maintaining Connections to the Past.

ERIC Educational Resources Information Center

Rossi, John M.

2003-01-01

Describes adaptive reuse of college buildings, which involves reconfiguring existing buildings for entirely new functions, including its benefits. Examples include Bartlett Hall at the University of Chicago, Annenberg Hall and Locker Chambers at Harvard University, Goodrich Hall at Williams College, and Sarratt Student Center at Vanderbilt…

Implementing Proactive Network Management Solutions in the Residence Halls

ERIC Educational Resources Information Center

Bedi, Param

2005-01-01

This paper discusses how to implement networking solutions in residence halls at Arcadia University in Philadelphia. Sections of the paper include: (1) About Arcadia University; (2) Residence Halls Network; (3) How Campus Manager Helped Arcadia University; (4) What Is Campus Manager; (5) How Campus Manager Works; (6) Campus Manager Remediation…

Chapin Hall Center for Children.

ERIC Educational Resources Information Center

Chicago Univ., IL. Chapin Hall Center for Children.

This document consists of two separate publications: (1) "The Power of Knowing", a brief 12-page description of the Chapin Hall Center for Children, and (2) "Projects and Publications", a 67-page list of the center's projects and publications as of Autumn 1997. "The Power of Knowing" describes the Chapin Hall Center…

Study of Energy Loss Mechanisms in the BPT-4000 Hall Thruster

DTIC Science & Technology

2003-06-30

Aerojet has developed a high performance multi-mode flightweight Hall thruster for orbit raising and stationkeeping on geo-synchronous satellites. In...order to further understand and improve upon the performance of this state of the art Hall thruster and other next generation thrusters being planned

Very-Near-Field Plume Model of a Hall Thruster

DTIC Science & Technology

2003-07-20

UNCLASSIFIED Defense Technical Information Center Compilation Part Notice ADP014988 TITLE: Very-Near-Field Plume Model of a Hall Thruster DISTRIBUTION...numbers comprise the compilation report: ADP014936 thru ADP015049 UNCLASSIFIED am 46 Very-Near-Field Plume Model of a Hall Thruster F. Taccogna’, S. LongoŖ

Modeling a Hall Thruster from Anode to Plume Far Field

DTIC Science & Technology

2008-12-31

Two dimensional ax symmetric simulations of xenon plasma plume flow fields from a D55 Anode layer Hall thruster is performed. A hybrid particle-fluid...method is used for the Simulations. The magnetic field surrounding the Hall thruster exit is included in the Calculation. The plasma properties

High Life: 17th Annual Residence Hall Construction Report

ERIC Educational Resources Information Center

Agron, Joe

2006-01-01

Residence hall construction continues to be a priority for colleges and universities. With enrollments on the upswing, higher-education institutions are spending more and building larger facilities to entice students to live on campus. This article presents the findings of "American School & University's" 17th annual Residence Hall Construction…

Hall devices improve electric motor efficiency

NASA Technical Reports Server (NTRS)

Haeussermann, W.

1979-01-01

Efficiency of electric motors and generators is reduced by radial magnetic forces created by symmetric fields within device. Forces are sensed and counteracted by Hall devices on excitation or control windings. Hall generators directly measure and provide compensating control of anu asymmetry, eliminating additional measurements needed for calibration feedback control loop.

Acoustic Requirements for a Multi-Purpose Hall.

ERIC Educational Resources Information Center

Schulte, W. Allen

2002-01-01

This case study examines the proposed design of a new lecture/recital hall in Centennial Hall at Lynchburg College that will be used for lectures, public events, a film studies course, and musical recitals. It explores the audio-visual challenges presented by the differing acoustical requirements for the building. (EV)

Coping Behaviors of Residence Hall Directors

ERIC Educational Resources Information Center

Wilkes, Ben

2017-01-01

This mixed-methods study examined tertiary-level residence-hall directors' reported coping behaviors for three systems of stress: environmental, personal, and work. It surveyed a convenience sample of 128 respondents using the Brief COPE scale (Carver, 1997). Reported length of service, genders, and hall populations were matched with 28 types of…

International Symposium on Gas Kinetics (8th) Held in Nottingham, England on 15-20 July 1984. Abstracts

DTIC Science & Technology

1984-07-20

Hall 16.00 -17.30 Tea, Hugh Stewart Hall 19.00 Buffet/Reception, Hugh Stewart Hall 19.00- 24.00 Cash bar in Hugh Stewart Hall Accesion For STATEMENT ...transfer involving highly vibrationally excited molecules J. R. Barker (SRI), T. C. Brown and K. D. King (Adelaide) 10.45-11.15 Coffee SESSION IV...D. King (Adelaide) and R. G. Gilbert (Sydney) 15.15-15.35 J4 Quantitative intermolecular energy transfer efficiencies from thermal studies C. D. Eley

KSC-2012-2719

NASA Image and Video Library

2012-05-05

CAPE CANAVERAL, Fla. – At NASA’s Kennedy Space Center Visitor Complex in Florida, Astronaut Scholarship Foundation Chairman and Hall of Fame astronaut Charlie Duke speaks during the U.S. Astronaut Hall of Fame induction ceremony. Space shuttle astronauts Franklin Chang Diaz, Kevin Chilton and Charlie Precourt were inducted into the Hall of Fame Class of 2012. The year’s inductees were selected by a committee of current Hall of Fame astronauts, former NASA officials, historians and journalists. The selection process is administered by the Astronaut Scholarship Foundation. Photo credit: NASA/Jim Grossmann

KSC-2012-2726

NASA Image and Video Library

2012-05-05

CAPE CANAVERAL, Fla. – At NASA’s Kennedy Space Center Visitor Complex in Florida, Astronaut Scholarship Foundation Chairman and Hall of Fame astronaut Charlie Duke inducts shuttle astronaut Kevin Chilton into the U.S. Astronaut Hall of Fame Class of 2012 during the induction ceremony. Shuttle astronauts Franklin Chang Diaz and Charlie Precourt also were inducted into the Hall of Fame. The year’s inductees were selected by a committee of current Hall of Fame astronauts, former NASA officials, historians and journalists. The selection process is administered by the Astronaut Scholarship Foundation. Photo credit: NASA/Jim Grossmann

KSC-2012-2731

NASA Image and Video Library

2012-05-05

CAPE CANAVERAL, Fla. – At NASA’s Kennedy Space Center Visitor Complex in Florida, Astronaut Scholarship Foundation Chairman and Hall of Fame astronaut Charlie Duke inducts shuttle astronaut Charlie Precourt into the U.S. Astronaut Hall of Fame Class of 2012 during the induction ceremony. Shuttle astronauts Franklin Chang Diaz and Kevin Chilton also were inducted into the Hall of Fame. The year’s inductees were selected by a committee of current Hall of Fame astronauts, former NASA officials, historians and journalists. The selection process is administered by the Astronaut Scholarship Foundation. Photo credit: NASA/Jim Grossmann

Jefferson Lab Experimental Hall C

NASA Astrophysics Data System (ADS)

Carlini, Roger D.

1996-10-01

Jefferson Lab's Hall C went into initial operation in November 1995. The hall has a short orbit spectrometer (SOS) for short-lived particles such as pions and kaons and a high-momentum spectrometer (HMS) usually used for electrons. The SOS can also be used for protons. The HMS can range to 7 GeV/c. Both the SOS and HMS have typical resolutions of (10-3). Experiments for this hall range from measuring the neutron electric form factor, to color transparency, to creating strange nuclei. This paper will present the optical capabilities of the spectrometers, the parameters of the detection systems, and the overall beam line characteristics of the hall as determined from the results from the recent physics experiments along with the upcoming experimental schedule. Additional information is available at URL http://www.cebaf.gov/hallc.html.

Photo-modulation of the spin Hall conductivity of mono-layer transition metal dichalcogenides

DOE Office of Scientific and Technical Information (OSTI.GOV)

Sengupta, Parijat; Bellotti, Enrico

2016-05-23

We report on a possible optical tuning of the spin Hall conductivity in mono-layer transition metal dichalcogenides. Light beams of frequencies much higher than the energy scale of the system (the off-resonant condition) do not excite electrons but rearrange the band structure. The rearrangement is quantitatively established using the Floquet formalism. For such a system of mono-layer transition metal dichalcogenides, the spin Hall conductivity (calculated with the Kubo expression in presence of disorder) exhibits a drop at higher frequencies and lower intensities. Finally, we compare the spin Hall conductivity of the higher spin-orbit coupled WSe{sub 2} to MoS{sub 2}; themore » spin Hall conductivity of WSe{sub 2} was found to be larger.« less

Quasi-one-dimensional quantum anomalous Hall systems as new platforms for scalable topological quantum computation

NASA Astrophysics Data System (ADS)

Chen, Chui-Zhen; Xie, Ying-Ming; Liu, Jie; Lee, Patrick A.; Law, K. T.

2018-03-01

Quantum anomalous Hall insulator/superconductor heterostructures emerged as a competitive platform to realize topological superconductors with chiral Majorana edge states as shown in recent experiments [He et al. Science 357, 294 (2017), 10.1126/science.aag2792]. However, chiral Majorana modes, being extended, cannot be used for topological quantum computation. In this work, we show that quasi-one-dimensional quantum anomalous Hall structures exhibit a large topological regime (much larger than the two-dimensional case) which supports localized Majorana zero energy modes. The non-Abelian properties of a cross-shaped quantum anomalous Hall junction is shown explicitly by time-dependent calculations. We believe that the proposed quasi-one-dimensional quantum anomalous Hall structures can be easily fabricated for scalable topological quantum computation.

Batch-fabricated high-performance graphene Hall elements

PubMed Central

Xu, Huilong; Zhang, Zhiyong; Shi, Runbo; Liu, Honggang; Wang, Zhenxing; Wang, Sheng; Peng, Lian-Mao

2013-01-01

Hall elements are by far the most widely used magnetic sensor. In general, the higher the mobility and the thinner the active region of the semiconductor used, the better the Hall device. While most common magnetic field sensors are Si-based Hall sensors, devices made from III-V compounds tend to favor over that based on Si. However these devices are more expensive and difficult to manufacture than Si, and hard to be integrated with signal-processing circuits for extending function and enforcing performance. In this article we show that graphene is intrinsically an ideal material for Hall elements which may harness the remarkable properties of graphene, i.e. extremely high carrier mobility and atomically thin active body, to create ideal magnetic sensors with high sensitivity, excellent linearity and remarkable thermal stability. PMID:23383375

Semiclassical theory of Hall viscosity

NASA Astrophysics Data System (ADS)

Biswas, Rudro

2014-03-01

Hall viscosity is an intriguing stress response in quantum Hall systems and is predicted to be observable via the conductivity in an inhomogeneous electric field. This has been studied extensively using a range of techniques, such as adiabatic transport, effective field theories, and Kubo formulae. All of these are, however, agnostic as to the distinction between strongly correlated quantum Hall states and non-interacting ones, where the effect arises due to the fundamental non-commuting nature of velocities and orbit positions in a magnetic field. In this talk I shall develop the semiclassical theory of quantized cyclotron orbits drifting in an applied inhomogeneous electric field and use it to provide a clear physical picture of how single particle properties in a magnetic field contribute to the Hall viscosity-dependence of the conductivity.

Hall effect on magnetohydrodynamic instabilities at an elliptic magnetic stagnation line

NASA Astrophysics Data System (ADS)

Spies, Günther O.; Faghihi, Mustafa

1987-06-01

To answer the question whether the Hall effect removes the unphysical feature of ideal magnetohydrodynamics of predicting small wavelength kink instabilities at any elliptic magnetic stagnation line, a normal mode analysis is performed of the motion of an incompressible Hall fluid about cylindrical Z-pinch equilibria with circular cross sections. The eigenvalue loci in the complex frequency plane are derived for the equilibrium with constant current density. Every particular mode becomes stable as the Hall parameter exceeds a critical value. This value, however, depends on the mode such that it increases to infinity as the ideal growth rate decreases to zero, implying that there always remains an infinite number of slowly growing instabilities. Correspondingly, the stability criterion for equilibria with arbitrary current distributions is independent of the Hall parameter.

Magnetic Reconnection and Modification of the Hall Physics Due to Cold Ions at the Magnetopause

NASA Technical Reports Server (NTRS)

Andre, M.; Li, W.; Toldeo-Redondo, S.; Khotyaintsev, Yu. V.; Vaivads, A.; Graham, D. B.; Norgren, C.; Burch, J.; Lindqvist, P.-A.; Marklund, G.;

The rotation of discs around neutron stars: dependence on the Hall diffusion

NASA Astrophysics Data System (ADS)

Faghei, Kazem; Salehi, Fatemeh

2018-01-01

In this paper, we study the dynamics of a geometrically thin, steady and axisymmetric accretion disc surrounding a rotating and magnetized star. The magnetic field lines of star penetrate inside the accretion disc and are twisted due to the differential rotation between the magnetized star and the disc. We apply the Hall diffusion effect in the accreting plasma, because of the Hall diffusion plays an important role in both fully ionized plasma and weakly ionized medium. In the current research, we show that the Hall diffusion is also an important mechanism in accreting plasma around neutron stars. For the typical system parameter values associated with the accreting X-ray binary pulsar, the angular velocity of the inner regions of disc departs outstandingly from Keplerian angular velocity, due to coupling between the magnetic field of neutron star and the rotating plasma of disc. We found that the Hall diffusion is very important in inner disc and increases the coupling between the magnetic field of neutron star and accreting plasma. On the other word, the rotational velocity of inner disc significantly decreases in the presence of the Hall diffusion. Moreover, the solutions imply that the fastness parameter decreases and the angular velocity transition zone becomes broad for the accreting plasma including the Hall diffusion.

3D Quantum Hall Effect of Fermi Arc in Topological Semimetals

NASA Astrophysics Data System (ADS)

Wang, C. M.; Sun, Hai-Peng; Lu, Hai-Zhou; Xie, X. C.

2017-09-01

The quantum Hall effect is usually observed in 2D systems. We show that the Fermi arcs can give rise to a distinctive 3D quantum Hall effect in topological semimetals. Because of the topological constraint, the Fermi arc at a single surface has an open Fermi surface, which cannot host the quantum Hall effect. Via a "wormhole" tunneling assisted by the Weyl nodes, the Fermi arcs at opposite surfaces can form a complete Fermi loop and support the quantum Hall effect. The edge states of the Fermi arcs show a unique 3D distribution, giving an example of (d -2 )-dimensional boundary states. This is distinctly different from the surface-state quantum Hall effect from a single surface of topological insulator. As the Fermi energy sweeps through the Weyl nodes, the sheet Hall conductivity evolves from the 1 /B dependence to quantized plateaus at the Weyl nodes. This behavior can be realized by tuning gate voltages in a slab of topological semimetal, such as the TaAs family, Cd3 As2 , or Na3Bi . This work will be instructive not only for searching transport signatures of the Fermi arcs but also for exploring novel electron gases in other topological phases of matter.

Proterozoic Diabase Dyke Swarms of Northern Ontario: Paleomagnetic Indicators of Broad-Scale Crustal Deformation of the Archean Superior Province

NASA Astrophysics Data System (ADS)

Halls, H. C.

2004-05-01

Several Proterozoic dyke swarms, all with precise U-Pb ages, (Matachewan, Senneterre, Biscotasing, Marathon and Fort Frances) occur over an area of the southern Superior Province covering more than 300,000 square kilometres. Cutting across this region is the Kapuskasing Zone, a 500 km-long fault zone along which dextral transpression at about 1.9 to 2.0 Ga has produced crustal uplift locally in excess of 20 km and lateral fault displacements of up to 70 km (Percival and West, 1994). The 2446-2473 Ma Matachewan swarm has been a subject for study throughout the last 40 years of Canadian paleomagnetism. However only in the last 20 years has the true size of the swarm been realised (Ernst and Halls, 1984; Halls et al., 1994), and the discovery made that regional variations in the direction of primary magnetization in the dykes are intimately related to the Kapuskasing Zone (KZ). The swarm is now known to span a single reversal of the Earth's magnetic field. The younger N polarity epoch, although barely recorded in the dying stages of the intrusive episode, is well preserved in dykes within uplifted crust inside the KZ. Here fine-grained magnetite, exsolved from dyke feldspars due to slow cooling of the swarm at depth, acquired a remanence of probable thermo-chemical origin prior to or during crustal uplift (Halls and Palmer, 1990; Halls et al., 1994; Halls and Zhang, 2003). The inference is that dykes intruded during the older R polarity epoch carry a near surface primary R magnetization but have been remagnetized to N at depth. Paleomagnetic data from that part of the swarm outside the KZ are therefore dominated by the older R polarity magnetization. They show that the western half of the shield has rotated counter-clockwise about 10 to 20 degrees relative to the eastern half across the KZ (Bates and Halls, 1991; Halls and Stott, 2003). This rotation is also seen in paleomagnetic data from the 2170 Ma Biscotasing swarm, which is now known to occur on both sides of the KZ (Halls and Davis, 2004). Lateral variations in clouding intensity and hydrous alteration levels in dyke feldspars reveal that the shield has been gently tilted towards the south, and that superimposed on this tilting is a series of fault-bounded, mostly uplifted, crustal blocks that constitute the KZ. In summary, results from more than 400 paleomagnetic sites in Ontario dykes show that the Superior province, despite being generally regarded as the epitome of a stable craton, has been regionally deformed, perhaps in several stages centred around 2.0 ± 0.2 Ga. If rotation across the KZ accompanied rifting beneath Hudson Bay, it may explain the overall butterfly - shaped outline of the Superior Province. References: Bates, M. and Halls, H. 1991, CJES 28: 1780; Ernst, R. and Halls, H. 1984, CJES 21:1499; Halls, H. and Palmer, H. 1990, CJES 27: 87; Halls, H., Palmer, H.,Bates, M. and Phinney, W. 1994, CJES 31:1182; Halls, H. and Zhang, B. 2003, Tectonophysics 362:123; Halls, H. and Stott, G. 2003, OGS Open File Rept. No. 6120, 7p; Halls, H. and Davis, D. CJES 41,(in press); Percival, J. and West, G. 1994, CJES 31:1256.