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Sample records for win boltzmann award

  1. Frances Allen Wins Turing Award

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 12; Issue 8. Frances Allen Wins Turing Award. Priti Shankar. Article-in-a-Box Volume 12 Issue 8 August 2007 pp 5-5. Fulltext. Click here to view fulltext PDF. Permanent link: http://www.ias.ac.in/article/fulltext/reso/012/08/0005-0005. Author Affiliations.

  2. Tectonics wins AAP Award

    Science.gov (United States)

    AGU's newest journal, Tectonics, won the 1983 award for excellence in journal design and production given by the Association of American Publishers, Inc. (AAP), in the eighth annual professional and scholarly publishing awards competition. Edited by John F. Dewey, the bimonthly journal is a joint publication of AGU and the European Geophysical Society. Paul E. Tapponnier is the European editor and B.C. Burchfiel is the North American editor. The journal is now in its third year of publication.

  3. CERNois wins prestigious accelerator award

    CERN Multimedia

    Katarina Anthony

    2011-01-01

    During the 2nd International Particle Accelerator Conference, CERN’s Rogelio Tomás García became the first Spaniard to receive the Frank Sacherer Prize for his work in particle beam optics.   Rogelio Tomás García at the 2nd International Particle Accelerator Conference. The Frank Sacherer Prize is awarded to physicists who have made a “significant, original contribution to the accelerator field" early on in their career. This year the prize was given to Rogelio Tomás García who, at only 35 years of age, has made important contributions to the optics design, optics measurement, and correction techniques applied at both the LHC and Brookhaven’s RHIC. “Tomás has had a vital impact on CERN’s beam optics studies and has made very impressive achievements in the field of beam optics,” says Oliver Brüning, Head of the Accelerators and Beam Physics...

  4. Supporting Young Writers with Award-Winning Books

    Science.gov (United States)

    MacKay, Kathryn Lake; Ricks, Paul H.; Young, Terrell A.

    2017-01-01

    This article presents a way to use award-winning books as mentor texts for very young writers. Books were selected as mentor texts from the winners of the Australian Early Childhood Children's Book of the Year Award and the American Theodor Seuss Geisel Award. The authors explain the value of using award-winning texts in the classroom and describe…

  5. Leaders in high temperature superconductivity commercialization win superconductor industry award

    CERN Multimedia

    2007-01-01

    CERN's Large Hadron Collider curretn leads project head Amalia Ballarino named superconductor industry person of the year 2006. Former high temperature superconductivity program manager at the US Department of energy James Daley wins lifetime achievement award. (1,5 page)

  6. Analysis of Latino Award Winning Children's Literature

    Science.gov (United States)

    Gomm, Jeff; Heath, Melissa Allen; Mora, Pat

    2017-01-01

    In this article, we offer information about the specific challenges US Latino immigrant children face. We then determine which of these challenges are included in 72 award winning children's picture books, specifically created for and/or about Latino children. Our analysis offers information to assist school-based mental health professionals,…

  7. NPS’ Award-Winning Dudley Knox Library Launches Mobile Website

    OpenAIRE

    Naval Postgraduate School Public Affairs Office

    2012-01-01

    The Naval Postgraduate School’s Dudley Knox Library (DKL) recently launched a mobile version of its website to offer library users easy access anywhere, anytime to the wealth of information and services already offered by the award-winning library.

  8. Interior design students win two IDEC Student Design Competition awards

    OpenAIRE

    Watson-Bloch, Cathy

    2005-01-01

    Interior Design students in the School of Architecture + Design at Virginia Tech won two of the four awards presented in the 2004-2005 Interior Design Educators Council (IDEC) Student Design Competition. Winners were selected at the International IDEC Conference in Savannah, Ga. with Virginia Tech Interior Design students winning second place and honorable mention.

  9. LHC suppliers win Golden Hadron awards

    CERN Multimedia

    Maximilien Brice

    2004-01-01

    In a ceremony on 30 July, three of the 200 suppliers for the Large Hadron Collider (LHC) were presented with Golden Hadron awards. It is the third year that the awards have been presented to suppliers, not only for their technical and financial achievements but also for their compliance with contractual deadlines. This year the three companies are all involved in the supplies for the LHC's main magnet system.

  10. ATLAS book wins the IPPY awards

    CERN Multimedia

    Abha Eli Phoboo

    2014-01-01

    Hunting the Higgs, published by Papadakis Publishers in collaboration with the ATLAS experiment has won the Bronze prize in the Science category of the Independent Publisher Book Awards (see here). The Award ceremony will be held on 28 May in New York on the eve of the BookExpo America (see here).   “Ours is a souvenir book that gives viewers a glimpse of the discovery of the Higgs boson and the collaborative effort behind it of thousands of scientists in ATLAS,” says Claudia Marcelloni, communications officer of the ATLAS Experiment, who worked on the book with freelance science writer Colin Barras. “The science is noble and the collaboration heartwarming, and the IPPY Award is a great way to celebrate the mind-blowing story of human achievement.” Hunting the Higgs is the inside story of the ATLAS experiment at the Large Hadron Collider. It tells the journey of the experiment, from before the detector was born to the announcement of the discovery of t...

  11. Sexism and Gender-Typing in AATE Award-Winning Plays, 1990-1993.

    Science.gov (United States)

    Stroud, Cynthia D.

    1998-01-01

    Investigates whether the same patterns of sexism and gender-typing found in popular and award-winning children's literature exist in 10 award-winning plays for young people. Finds relatively few instances of nine overtly sexist traits in the plays. (SR)

  12. Resiliency in American Library Association Award Winning Juvenile Fiction: A Correlational Content Analysis

    Science.gov (United States)

    Foreman, Michelle T.

    2010-01-01

    The purpose of this quantitative content analysis was to determine whether there was a relationship between the age, gender, or race of protagonists in contemporary American Library Association award-winning juvenile literature and the representation of resilience by those characters. Award-winning juvenile fiction and biography books were…

  13. Survival in Academy Award-winning actors and actresses.

    Science.gov (United States)

    Redelmeier, D A; Singh, S M

    2001-05-15

    Social status is an important predictor of poor health. Most studies of this issue have focused on the lower echelons of society. To determine whether the increase in status from winning an academy award is associated with long-term mortality among actors and actresses. Retrospective cohort analysis. Academy of Motion Picture Arts and Sciences. All actors and actresses ever nominated for an academy award in a leading or a supporting role were identified (n = 762). For each, another cast member of the same sex who was in the same film and was born in the same era was identified (n = 887). Life expectancy and all-cause mortality rates. All 1649 performers were analyzed; the median duration of follow-up time from birth was 66 years, and 772 deaths occurred (primarily from ischemic heart disease and malignant disease). Life expectancy was 3.9 years longer for Academy Award winners than for other, less recognized performers (79.7 vs. 75.8 years; P = 0.003). This difference was equal to a 28% relative reduction in death rates (95% CI, 10% to 42%). Adjustment for birth year, sex, and ethnicity yielded similar results, as did adjustments for birth country, possible name change, age at release of first film, and total films in career. Additional wins were associated with a 22% relative reduction in death rates (CI, 5% to 35%), whereas additional films and additional nominations were not associated with a significant reduction in death rates. The association of high status with increased longevity that prevails in the public also extends to celebrities, contributes to a large survival advantage, and is partially explained by factors related to success.

  14. Faking or Convincing: Why Do Some Advertising Campaigns Win Creativity Awards?

    Directory of Open Access Journals (Sweden)

    Raoul V. Kübler

    2012-05-01

    Full Text Available Since the Sarbanes-Oxley Act was passed in 2002, it has become commonplace in the advertising industry to use creativity-award-show prizes instead of gross income figures to attract new customers. Therefore, achieving a top creativity ranking and winning creativity awards have become high priorities in the advertising industry. Agencies and marketers have always wondered what elements in the advertising creation process would lead to the winning of creativity awards. Although this debate has been dominated by pure speculation about the success of different routines, approaches and strategies in winning creativity awards, for the first time our study delivers an empirical insight into the key drivers of creativity award success. We investigate what strategies and which elements of an advertising campaign are truly likely to lead to winning the maximum number of creativity awards. Using a sample of 108 campaigns, we identify factors that influence campaign success at international advertising award shows. We identify innovativeness and the integration of multiple channels as the key drivers of creativity award success. In contrast to industry beliefs, meaningful or personally connecting approaches do not seem to generate a significant benefit in terms of winning creativity awards. Finally, our data suggest that the use of so-called “fake campaigns” to win more creativity awards does not prove to be effective.

  15. Faking or Convincing: Why Do Some Advertising Campaigns Win Creativity Awards?

    National Research Council Canada - National Science Library

    Kübler, Raoul V; Proppe, Dennis

    2012-01-01

    .... Although this debate has been dominated by pure speculation about the success of different routines, approaches and strategies in winning creativity awards, for the first time our study delivers...

  16. Analysing the Subject of Peace in Award-Winning Children's and Adolescent Novels in Turkey

    Science.gov (United States)

    Aslan, Canan; Kepenekci, Yasemin Karaman; Güldenoglu, Bilge Nur Dogan; Karagül, Sedat

    2016-01-01

    The purpose of this study is to reveal how the concept of peace is addressed in the national award-winning novels written for secondary school students within the Republic of Turkey. Data for this study was obtained from child and youth literature award organizations, associations and publishers within Turkey. Each group which was researched has…

  17. Inclusive College Teaching: A Study of How Four Award-Winning Faculty Employ Universal Design Instruction

    Science.gov (United States)

    Moore, Carl S.

    2013-01-01

    Using universal design instruction (UDI) as a framework, this study explores the inclusive teaching practices of four award-winning humanities and social sciences faculty at a large urban Research I university located in the northeastern region of the United States. UDI, a framework used to assist teachers in creating proactively inclusive…

  18. Chinese Award-Winning Tutors' Perceptions and Practices of Classroom-Based Assessment

    Science.gov (United States)

    Zhou, Jiming; Deneen, Christopher Charles

    2016-01-01

    This study examines Chinese tertiary award-winning tutors' perceptions and reported practices of classroom-based assessment. Seventeen tutors in the final stage of a national university teaching contest were individually interviewed. An interview framework was developed using three process dimensions of assessment for learning (AfL). A sequential…

  19. Christopher Peters wins 2010 Reference Service Press Award

    OpenAIRE

    Purcell, Laura

    2010-01-01

    Christopher Peters, stacks manager at Virginia Tech's University Libraries, is the co-recipient of the Reference Service Press Award, granted by the American Library Association's Reference and User Services Association (RUSA).

  20. Three Argonne technologies win R&D 100 awards

    CERN Multimedia

    2003-01-01

    "Three technologies developed or co-developed at the U.S. Department of Energy's Argonne National Laboratory have been recognized with R&D 100 Awards, which highlight some of the best products and technologies from around the world" (1 page).

  1. Tourism researcher wins Best Paper Award at international conference

    OpenAIRE

    Ho, Sookhan

    2010-01-01

    Nancy McGehee, associate professor of hospitality and tourism management research at the Pamplin College of Business at Virginia Tech, received a 2010 Best Paper Award at the recent ATLAS (Association for Tourism and Leisure Education) International Conference on Sustainable Tourism.

  2. iPhone Design Award-Winning Projects

    CERN Document Server

    Dannen, Chris

    2010-01-01

    This book profiles developers who have received the prestigious Apple Design Award for iPhone app excellence. You'll learn all about what makes these apps truly standout, including explanations of great user interface design and implementation, as well as the code under the hood that makes these the most responsive, intuitive, useful, and just plain fun apps running on the iPhone. * Insightful profiles of the developers behind Tweetie, Topple 2, AccuTerra, Postage, and Wooden Labyrinth 3D* Detailed explanations of the technical wizardry that makes these apps tick* Full-color screenshots and co

  3. Excellence in the stacks strategies, practices and reflections of award-winning libraries

    CERN Document Server

    Hill, Jacob

    2013-01-01

    Excellence in the Stacks details the philosophies, practices and innovations of award-winning libraries over the last ten years. It will inform the profession and highlight the themes and strategies these liberal-arts colleges share, and where they differ. Using the Association of Research and College Libraries Excellence in Academic Libraries Award standards as guidelines for exploring librarianship, this book gathers the perspectives of all types of librarians at all levels of employment. By highlighting winners' holistic approaches it helps define and focus the energies of college libraries

  4. Clean cities: Award winning coalition -- Paso del Norte

    Energy Technology Data Exchange (ETDEWEB)

    O' Connor, K.

    1999-10-25

    Designated the 41st Clean Cities coalition in November 1995, the Paso del Norte Clean Cities Coalition (PDNCCC) is the first in the country to gain international participation. Spanning the US-Mexico border; the coalition includes stakeholders from El Paso, Texas; Ciudad Juarez, Mexico; and Las Cruces, New Mexico. PDNCCC developed a comprehensive plan to jump-start its program place, alternative fuel vehicles (AFVs) on the road, and eliminate barriers inhibiting alternative fuel market growth. PDNCC raised more than $2.3 million for alternative fuel activities and clean air initiatives in less than 26 months. In 1998, the US Department of Energy (DOE) recognized that PDNCCC accomplishment with its Rainmaker Award for leveraging the most funds from outside sources. PDNCCC is proud of its efforts to drive the alternative fuels and AFV market in the El Paso/Juarez region.

  5. Meet the best Award-winning technologies from Pacific Northwest Laboratory

    Energy Technology Data Exchange (ETDEWEB)

    1990-09-01

    The Battelle Memorial Institute has managed the Pacific Northwest Laboratory (PNL) for the US Department of Energy for 25 years. During this time, numerous new technologies have been discovered and developed at PNL as a result of our research programs. This document will introduce you to some of the more significant discoveries and newly commercialized technologies. Each of the technologies described has received an award from Research Development magazine or the Federal Laboratory Consortium--sometimes both Each technology is available to you through PNL's technology transfer program or one of our licensees. Similarly, our award-winning scientists and engineers are available to assist you as you search for innovative technologies to solve your technical problems. These researchers are familiar with current problems confronting industry, government agencies, and the academic community. They are happy to apply their skills and PNL's resources to your problems. PNL encourages its researchers to work with government agencies, universities, and US industries. PNL technology transfer programs address the nation's drive toward increased competitiveness by being flexible and aggressive, and are designed to tailor results to fit your needs and those of your clients. If you are in search of a new technology or increased competitiveness, consider collaborative efforts with our award-winning staff, whose accomplishments are synopsized in this booklet.

  6. The impact of gender and nationality on winning a professional society award

    Science.gov (United States)

    Holmes, Mary Anne; McKenzie, Judith

    2016-04-01

    Women are under-represented for science awards and fellow status in professional science societies (accounting for career stage) and are over-represented for teaching and service awards (Ball et al., 2015; Lincoln et al., 2012; Holmes et al., 2011). In addition, for the American Geophysical Union, non-U.S. members are under-represented among all awardees. Gender bias in evaluation processes are well-documented (e.g., Valian, 1999), and cultural differences are at play in the under-representation of non U.S. members. U.S. members are more likely to nominate their peers for awards, and to write effusive letters to support the nomination (Ball et al., 2015). There are effective mechanisms to reduce bias in both nomination and evaluation processes, a few of which are: 1) separate the nomination and evaluation processes by creating nomination committees of a diverse group of people who actively seek potential nominees and promote their nominations; this expands the pool of nominees; 2) educate nomination and evaluation committees on the research that demonstrates the impact of implicit bias on nomination and selection processes (e.g., http://www.enei.org.uk/pages/unconscious-bias.html; http://wiseli.engr.wisc.edu/bias.php); 3) minimize use of simple bibliometric indices, which are known to exhibit gender bias (men self-cite more than women; Maliniak et al., 2013) and nationality bias (papers in English language journals are more likely to be cited than non-English journals (Bornmann et al., 2012; González-Alcaide et al., 2012); 4) members of the selection committee should understand the effects of gender on the quality of letters written for women (Trix and Psenka, 2003); 5) establish and follow clear criteria for the award. Professional societies can promote fairness and inclusion by self-study: find and compile the data on the gender, race, ethnicity and nationality of members who are nominated for and win awards, as well as on who is doing the nominating. Compare

  7. Mentor Perspectives on the Place of Undergraduate Research Mentoring in Academic Identity and Career Development: An Analysis of Award Winning Mentors

    Science.gov (United States)

    Hall, Eric E.; Walkington, Helen; Shanahan, Jenny Olin; Ackley, Elizabeth; Stewart, Kearsley A.

    2018-01-01

    This study examines how Undergraduate Research (UR) mentoring fits into the career profile of award-winning UR mentors and the factors that motivate engagement as UR mentors. Twenty-four award-winning UR mentors in four countries were interviewed about their mentoring practices. Six themes emerged: (1) Academic Identity and Motivations; (2)…

  8. Using Systems Thinking to Leverage Technology for School Improvement: Lessons Learned from Award-Winning Secondary Schools/Districts

    Science.gov (United States)

    Levin, Barbara B.; Schrum, Lynne

    2013-01-01

    This paper offers lessons learned about what it takes to successfully leverage technology for school improvement based on a cross-case analysis of eight award-winning secondary schools/districts around the United States. The researchers analyzed data from 150 interviews, 30 focus groups, and more than 300 hours of observation in 150 classrooms,…

  9. Simulations of oscillatory systems with award-winning software, physics of oscillations

    CERN Document Server

    Butikov, Eugene I

    2015-01-01

    Deepen Your Students' Understanding of Oscillations through Interactive Experiments Simulations of Oscillatory Systems: with Award-Winning Software, Physics of Oscillations provides a hands-on way of visualizing and understanding the fundamental concepts of the physics of oscillations. Both the textbook and software are designed as exploration-oriented supplements for courses in general physics and the theory of oscillations. The book is conveniently structured according to mathematical complexity. Each chapter in Part I contains activities, questions, exercises, and problems of varying levels of difficulty, from straightforward to quite challenging. Part II presents more sophisticated, highly mathematical material that delves into the serious theoretical background for the computer-aided study of oscillations. The software package allows students to observe the motion of linear and nonlinear mechanical oscillatory systems and to obtain plots of the variables that describe the systems along with phase diagram...

  10. Right Fronto-Temporal EEG can Differentiate the Affective Responses to Award-Winning Advertisements.

    Science.gov (United States)

    Wang, Regina W Y; Huarng, Shy-Peih; Chuang, Shang-Wen

    2017-04-28

    Affective engineering aims to improve service/product design by translating the customer's psychological feelings. Award-winning advertisements (AAs) were selected on the basis of the professional standards that consider creativity as a prerequisite. However, it is unknown if AA is related to satisfactory advertising performance among customers or only to the experts' viewpoints towards the advertisements. This issue in the field of affective engineering and design merits in-depth evaluation. We recruited 30 subjects and performed an electroencephalography (EEG) experiment while watching AAs and non-AAs (NAAs). The event-related potential (ERP) data showed that AAs evoked larger positive potentials 250-1400 [Formula: see text]ms after stimulus onset, particularly in the right fronto-temporal regions. The behavioral results were consistent with the professional recognition given to AAs by experts. The perceived levels of creativity and "product-like" quality were higher for the AAs than for the NAAs. Event-related spectral perturbation (ERSP) analysis further revealed statistically significant differences in the theta, alpha, beta, and gamma band activity in the right fronto-temporal regions between the AAs and NAAs. Our results confirm that EEG features from the time/frequency domains can differentiate affective responses to AAs at a neural circuit level, and provide scientific evidence to support the identification of AAs.

  11. Quantum customer CERN wins computerworld's prestigious 'best practices in storage' award for systems implementation

    CERN Multimedia

    2007-01-01

    "Quantum Corp., the leading global specialist in backup, recovery and archive, today announced that its customer, European-based nuclear research organization CERN, was awarded Computerworld's prestigious "Best Practices in Storage" award for Systems Implementation.

  12. "I Have a Dream, Too!": The American Dream in Coretta Scott King Award-Winning Books

    Science.gov (United States)

    Parsons, Linda T.; Castleman, Michele

    2011-01-01

    The Coretta Scott King (CSK) Award, instituted in 1969 and recognized as an official award by the American Library Association (ALA) in 1982, is conferred annually to an African American author and an illustrator for their outstanding contributions to literature about the Black experience for children and young adults. A partial impetus for the…

  13. Youth Employability. Monographs on Research and Policy Studies. Five Award-Winning Monographs.

    Science.gov (United States)

    Ohio State Univ., Columbus. National Center for Research in Vocational Education.

    This document presents five winning entries in the second annual competition for papers reporting research and policy studies on the topic of youth employability. In their paper entitled "The Impact of Employment and Training Programs on the Work Attitudes of Disadvantaged Youth," Michael Forcier and Andrew Hahn review and synthesize the…

  14. Scenes of Violence and Sex in Recent Award-Winning LGBT-Themed Young Adult Novels and the Ideologies They Offer Their Readers

    Science.gov (United States)

    Clark, Caroline T.; Blackburn, Mollie V.

    2016-01-01

    This study examines LGBT-inclusive and queering discourses in five recent award-winning LGBT-themed young adult books. The analysis brought scenes of violence and sex/love scenes to the fore. Violent scenes offered readers messages that LGBT people are either the victims of violence-fueled hatred and fear, or, in some cases, showed a gay person…

  15. Drug Enforcement Administration Western Lab wins EPA Federal Green Challenge award for electronics recycling

    Science.gov (United States)

    SAN FRANCISCO - Today, the U.S. Environmental Protection Agency Regional Administrator Jared Blumenfeld presented the Federal Green Challenge award to the Drug Enforcement Administration (DEA) Western Laboratory for increasing its electronics recycling mor

  16. Spatial positioning of gender in two award-winning software programs for learning english: a visual content analysis

    Directory of Open Access Journals (Sweden)

    Kordjazi, Zahra

    2013-01-01

    Full Text Available This research was conducted to identify and interpret how spaces were differentiated by gender in visual images included in two award-winning English-learning software applications (Tell Me More and English at Home. The visual content analysis was based on examining the following values: home, workplace, street and neighborhood environment, leisure areas, and shop. Findings showed that females appeared as subordinate, financially dependent, and powerless; males as dominant, sporty, breadwinners, and powerful. Material writers, software developers, and instructors should be sensitized to such unfair positioning of gender and encouraged to promote alternative spatial discursive practices. Additionally, learners need to be well-informed and visually literate. It is argued that by discovering how females and males are positioned in contemporary interactive texts, consciously structured pictorial descriptions of gender can be articulated and contested in technology-based educational media to reflect gender equality

  17. LHC suppliers win Golden Hadron awards : Sandro Ferraris and Guiseppi Ginola from Simic SpA

    CERN Multimedia

    Maximilien Brice

    2004-01-01

    Simic SpA (Italy) received its award for manufacturing the vacuum vessels for the superconducting dipoles. The 937 blue cylinders manufactured by Simic will provide the thermal insulation for the magnets. Measuring 15 metres in length and 1 metre in diameter, they are designed to withstand a vacuum of 10-4 Pa.

  18. Developing Teaching Self-Efficacy in Research Institutions: A Study of Award-Winning Professors

    Science.gov (United States)

    Morris, David B.; Usher, Ellen L.

    2011-01-01

    The purpose of this study was to assess the sources of award-wining research professors' (six women; six men) teaching self-efficacy through the framework of Bandura's (1986) social cognitive theory. Semi-structured interviews revealed that mastery experiences and social persuasions were particularly influential sources of self-efficacy and that…

  19. College of Architecture and Urban Studies undergraduates win national design awards

    OpenAIRE

    Chadwick, Heather Riley

    2006-01-01

    Two third-year architecture students from Virginia Tech's School of Architecture + Design in the College of Architecture and Urban Studies--Jonathan Hanahan, from Gibsonia, Pa., and Chelsea Greemore, from Alexandria, Va.--have won international awards from the Chicago Chapter of Architecture for Humanity (AFH Chicago).

  20. Award-Winning Performance and Consulting: An Interview with Burt Huber.

    Science.gov (United States)

    Dickelman, Gary

    2001-01-01

    Burt Huber and his team from Ariel Performance Centered Systems won a performance support design award at last year's Online Learning Conference for their system at Payless shoes. Huber discusses some details of his organization's designs; how he approaches a client; how he assesses organizational readiness for performance support; role of…

  1. Another award-winning year for CERN’s apprenticeship training programme

    CERN Multimedia

    Anne Gentil-Beccot

    2015-01-01

    CERN has a long tradition of training apprentices. The Organization’s apprenticeship programme, which is based on the Swiss apprenticeship system, dates back to 1965. Since then, over 200 apprentices have been trained at CERN. Each year, seven or eight apprentice electricians, library assistants and physics laboratory technicians qualify after three or four years of training, depending on the job.   UIG prize ceremony 2014: Angelina Bakker (third from right), apprentice physics laboratory technician at CERN, receives her "Certificat fédéral de capacité". On Tuesday, 25 November 2014, CERN was presented with a prize for being the best apprenticeship training scheme provider in 2014. This prize is awarded each year to eight apprenticeship providers active in the different “vocational categories” in the canton of Geneva. The prizes are awarded by the Geneva Department of Public Education, Culture and Sport (DIP)...

  2. Insights into an Award-Winning Summer Internship Program: The First Six Years.

    Science.gov (United States)

    Kashou, Anthony; Durairajanayagam, Damayanthi; Agarwal, Ashok

    2016-04-01

    Since its inception in 2008, the American Center for Reproductive Medicine's summer internship program in reproductive research and writing has trained 114 students from 23 states within the United States and 10 countries worldwide. Its fundamental goal is to inspire pre-medical and medical students to embrace a career as a physician-scientist. During this intensive course, established scientists and clinicians train interns in the essential principles and fundamental concepts of bench research and scientific writing. Over the first six years (2008~2013), interns have collectively published 98 research articles and performed 12 bench research projects on current and emerging topics in reproductive medicine. Interns have also developed and honed valuable soft skills including time management, communication and presentation skills, as well as life values, which all enhance personal and professional satisfaction. Program graduates are able to recognize the value of medical research and its potential to impact patient care and gain insight into their own career pathway. Between 2011 and 2014, the internship program was thrice awarded a Scholarship in Teaching Award by Case Western Reserve School of Medicine for its innovative teaching approach and positive impact on medical education and student careers. This report highlights the demographics, logistics, implementation, feedback, and results of the first six years of the American Center for Reproductive Medicine's summer internship program at Cleveland Clinic (Cleveland, OH, USA). This may be helpful to other research and academic institutions considering implementing a similar program. In addition, it creates awareness among potential physician-scientists of what the world of research has to offer in both scientific writing and bench research. Finally, it may stimulate further discussion regarding narrowing the gap between physicians and scientists and refinement of the current program.

  3. ESO Telescope Designer Raymond Wilson Wins Prestigious Kavli Award for Astrophysics

    Science.gov (United States)

    2010-06-01

    Raymond Wilson, whose pioneering optics research at ESO made today's giant telescopes possible thanks to "active optics" technology, has been awarded the 2010 Kavli Prize in astrophysics. The founder and original leader of the Optics and Telescopes Group at ESO, Wilson shares the million-dollar prize with two American scientists, Jerry Nelson and Roger Angel. The biennial prize, presented by the Norwegian Academy of Science and Letters, the Kavli Foundation, and the Norwegian Ministry of Education and Research, was instituted in 2008 and is given to researchers who significantly advance knowledge in the fields of nanoscience, neuroscience, and astrophysics, acting as a complement to the Nobel Prize. The award is named for and funded by Fred Kavli, the Norwegian entrepreneur and phi­lanthropist who later founded the Kavlico Corpora­tion in the US - today one of the world's largest suppliers of sensors for aeronautic, automotive and industrial applications. Wilson, who joined ESO in 1972, strived to achieve optical perfection, developing the concept of active optics as a way to enhance the size of telescopic primary mirrors. It is the size of these mirrors that determines the ability of a telescope to gather light and study faint and distant objects. Before active optics, mirrors over six metres in diameter were impossible, being too heavy, costly, and likely to bend from gravity and temperature changes. The use of active optics, which preserves optimal image quality by continually adjusting the mirror's shape during observations, made lighter, thinner so-called "meniscus mirrors" possible. Wilson first led the implementation of active optics in the revolutionary New Technology Telescope at ESO's La Silla Observatory, and continued to develop and improve the technology until his retirement in 1993. Since then, active optics have become a standard part of modern astronomy, applied in every big telescope including ESO's Very Large Telescope (VLT), a telescope array

  4. Brookhaven Lab physicists Edward Beebe and Alexander Pikin win 'Brightness Award' for achievement in ion source physics and technology

    CERN Multimedia

    2003-01-01

    "Edward Beebe and Alexander Pikin, physicists at the U.S. Department of Energy's Brookhaven National Laboratory, have been awarded the Ion Source Prize, known as the "Brightness Award," which recognizes and encourages innovative and significant recent achievements in the fields of ion source physics and technology" (1 page).

  5. Berkeley Lab's Saul Perlmutter wins E.O. Lawrence Award; scientist's work on supernovae reveals accelerating Universe

    CERN Multimedia

    2002-01-01

    Saul Perlmutter, from Lawrence Berkeley National Laboratory Physics Division and leader of the Supernova Cosmology Project based there, has won the DOE's 2002 E.O. Lawrence Award in the physics category (2 pages).

  6. Berkeley Lab's Saul Perlmutter wins E.O. Lawrence Award scientist's work on supernovae reveals accelerating universe

    CERN Multimedia

    2002-01-01

    "Saul Perlmutter, a member of Lawrence Berkeley National Laboratory's Physics Division and leader of the international Supernova Cosmology Project based there, has won the Department of Energy's 2002 E.O. Lawrence Award in the physics category" (1/2 page).

  7. LHC suppliers win Golden Hadron awards : Gianfranco Malvestiti and Ernesto Malvestiti de Ernesto Malvestiti SpA (Italie)

    CERN Multimedia

    Maximilien Brice

    2004-01-01

    Ernesto Malvestiti SpA (Italy) is the main manufacturer of the metal collars needed to ensure the rigidity of the superconducting dipoles. The firm was awarded its prize in recognition of the central role it played during the transition from aluminium to stainless-steel collars.

  8. Awards

    Science.gov (United States)

    The first presentation of the newly approved Charles A. Whitten Medal for Outstanding Achievement in Research on the Form and Dynamics of the Earth and Planets was made to Charles A. Whitten at the 1985 Spring Meeting. In addition, the first presentation of the Harry H. Hess Medal for Outstanding Achievements in Research in the Constitution and Evolution of Earth and Sister Planets was made to Gerald J. Wasserburg at the 1985 Fall Meeting.A full program of honors and awards recognizes AGU members and other outstanding geophysicists who make significant contributions to geophysical knowledge and understanding. In addition to the presentation of the medals and awards listed below, a select committee annually confers the designation of Fellow on AGU members who have distinguished themselves in geophysics.

  9. The Award Winning Black Suns

    Science.gov (United States)

    Holbrook, Jarita

    2018-01-01

    Black Suns: An Astrophysics Adventure is a documentary film focusing on the annular and total solar eclipses of 2012. We made a different kind of astronomy documentary showing the human aspects rather than just focusing on pretty astronomy pictures. The film combines personal stories with science. Our heroes are Hakeem Oluseyi and Alphonse Sterling, who valiantly travel to study the solar corona during total solar eclipses. The goals of the film included presenting three dimensional scientists, to show their paths to becoming astrophysicists, and to show them as they collect data and work as scientists. Drama and tension surround taking data during the small window of time during totality. The Black Suns was filmed in Tokyo, Cairns, Tucson, and Melbourne Florida. Uniquely, the film began through a Kickstarter campaign to fund travel and filming in Tokyo. Many American Astronomical Society members donated to the film! Black Suns won the Jury Prize at the 2017 Art of Brooklyn Film Festival. Black Suns will be screening in full on ???.

  10. Spectacularizing Life and the Everyday in Photojournalism: A Critical Analysis on Award- winning Images in the “Daily Life” Category of the World Press Photo Contest, 2010-2016

    Directory of Open Access Journals (Sweden)

    Li-Hsin Kuo

    2017-10-01

    Full Text Available This paper studies award-winning photographs in the “Daily Life” category of the World Press Photo (WPP contest during 2010-2016, and analyzes how those images from this influential photojournalistic institution in the West look at “life” and “the everyday”. The essay reviews LIFE magazine, from which a certain set of professional conventions in Western photojournalism was “invented”, and explains how it has shaped and encouraged the practices in WPP. The essay argues that award-winning photographic images in this category of WPP from all over the world, particularly those from non-Western areas, have transformed daily lives into cultural/visual spectacles through the contents selected, special angles/visual styles taken, or anticipated readers of the works. Due to the WPP’s immense power in media and culture, this paper further contends that photojournalists from non-Western countries internalize such approaches exercised by Western photographers and jury members, and eventually self-exoticize the daily lives in their own societies.

  11. Deet's Place awarded prestigious Golden Cup award

    OpenAIRE

    Dawson, Brandi

    2007-01-01

    Virginia Tech's premier coffee, ice cream, and pastry shop--Deet's Place--has been recognized with it's second Golden Cup award, presented by the Specialty Coffee Association of America, which recognizes excellence in brewed coffee. The award is presented each year to retailers and restaurants whose specialty coffee is properly ground and brewed. Deet's Place has submitted entries for this award twice, and has received the honor both times, with the previous win in 2000.

  12. Finite Boltzmann schemes

    NARCIS (Netherlands)

    Sman, van der R.G.M.

    2006-01-01

    In the special case of relaxation parameter = 1 lattice Boltzmann schemes for (convection) diffusion and fluid flow are equivalent to finite difference/volume (FD) schemes, and are thus coined finite Boltzmann (FB) schemes. We show that the equivalence is inherent to the homology of the

  13. CERN exhibition wins yet another design prize

    CERN Multimedia

    Joannah Caborn Wengler

    2012-01-01

    The “Universe of Particles” exhibition in CERN’s Globe wins the silver design prize from the German direct business communications association FAMAB.   Not only do tens of thousands of people visit the “Universe of Particles” exhibition each year, but juries for design prizes are crossing its threshold more and more frequently too. In 2011 alone it claimed 8 awards, including winning outright the 2011 Annual Multimedia award, the iF Communication Design for Corporate Architecture award and the Modern Decoration Media award (the Bulletin already reported on some of these in July 2011). The FAMAB award is the latest to join the prestigious list. The jury of FAMAB’s “ADAM 2011” award was particularly impressed by the hands-on nature of the exhibition, which encourages visitors to get interested in science. They also appreciated the way that the space in the Globe is not just a container for the exhibits, but itself ...

  14. Clean Cities Award Winning Coalition: Coachella Valley

    Energy Technology Data Exchange (ETDEWEB)

    ICF Kaiser

    1999-05-20

    Southern California's Coachella Valley became a Clean Cities region in 1996. Since then, they've made great strides. SunLine Transit, the regional public transit provider, was the first transit provider to replace its entire fleet with compressed natural gas buses. They've also built the foundation for a nationally recognized model in the clean air movement, by partnering with Southern California Gas Company to install a refueling station and developing a curriculum for AFV maintenance with the College of the Desert. Today the valley is home to more than 275 AFVs and 15 refueling stations.

  15. A imagem do psiquiatra em filmes ganhadores do Prêmio da Academia entre 1991 e 2001 The image of psychiatrist in Academy Award winning films from 1991 to 2001

    Directory of Open Access Journals (Sweden)

    Maria Thereza Bonilha Dubugras

    2007-04-01

    Full Text Available OBJETIVOS: Os objetivos do estudo são descrever os personagens de psiquiatras existentes em filmes vencedores de um ou mais Prêmios da Academia, entre 1991 e 2001, bem como, verificar se esses filmes transmitem mensagens negativas sobre a psiquiatria ou se apresentam retratos idealizados de profissionais, como algumas produções cinematográficas anteriores ao período estudado. MÉTODO: Foi realizada a análise de caracterização dramática dos personagens. Foram identificados os temas e as mensagens relacionados à psiquiatria presentes nas tramas para comparação com produções anteriores a 1991. RESULTADOS: Nove filmes foram selecionados e analisados 17 personagens. "O Silêncio dos Inocentes" associa psiquiatria e loucura, genialidade e doença mental, análise e canibalismo. De acordo com "As Loucuras do Rei George", "Gênio Indomável" e "Garota, Interrompida", o psiquiatra ideal tem idéias modernas, histórico semelhante ao do paciente, postura informal e demonstra emoção. "Shakespeare Apaixonado" associa a psiquiatria à magia. "Melhor é Impossível" apresenta uma representação positiva da medicação psiquiátrica. "Shine - Brilhante" e "Mente Brilhante" destacam a importância da família para a recuperação do paciente. Em "Céu Azul", a psiquiatria é usada para a interdição de uma pessoa por motivos políticos. CONCLUSÕES: Os filmes estudados não contestam a validade da psiquiatria, mas apresentam uma batalha entre a abordagem tradicional e uma não tradicional, advogando que um psiquiatra deve ser alguém fora dos padrões e excepcionalmente talentoso para ser capaz de entender e tratar uma pessoa. As críticas e as imagens negativas apresentadas nessas tramas podem ser um reflexo do profundo estigma existente na sociedade em relação aos profissionais de saúde mental e pacientes.OBJECTIVES: This study aims at describing characters portraying psychiatrists in Academy Award winning films from 1991 to 2001, and

  16. Ludwig Boltzmann: Atomic genius

    Energy Technology Data Exchange (ETDEWEB)

    Cercignani, C. [Department of Mathematics, Politecnico di Milano (Italy)]. E-mail: carcer@mate.polimi.it

    2006-09-15

    On the centenary of the death of Ludwig Boltzmann, Carlo Cercignani examines the immense contributions of the man who pioneered our understanding of the atomic nature of matter. The man who first gave a convincing explanation of the irreversibility of the macroscopic world and the symmetry of the laws of physics was the Austrian physicist Ludwig Boltzmann, who tragically committed suicide 100 years ago this month. One of the key figures in the development of the atomic theory of matter, Boltzmann's fame will be forever linked to two fundamental contributions to science. The first was his interpretation of 'entropy' as a mathematically well-defined measure of the disorder of atoms. The second was his derivation of what is now known as the Boltzmann equation, which describes the statistical properties of a gas as made up of molecules. The equation, which described for the first time how a probability can evolve with time, allowed Boltzmann to explain why macroscopic phenomena are irreversible. The key point is that while microscopic objects like atoms can behave reversibly, we never see broken coffee cups reforming because it would involve a long series of highly improbable interactions - and not because it is forbidden by the laws of physics. (U.K.)

  17. Gli atomi di Boltzmann

    CERN Document Server

    Lindley, David

    2002-01-01

    Ludwig Boltzmann (1844-1906) è il fisico e matematico austriaco che negli ultimi decenni dell'Ottocento e ancora ai primi del Novecento lottò contro l'opinione dominante tra gli scienziati dell'epoca per affermare la teoria atomica della materia. È noto come con Albert Einstein e fino a oggi la fisica si sia sviluppata e abbia celebrato i propri trionfi lungo le linee anticipate da Boltzmann. La controversia con Mach non riguardava soltanto l'esistenza degli atomi, ma l'intero modo di fare fisica che Boltzmann non riteneva di dover limitare allo studio di quantità misurabili, introducendo invece spiegazioni più elaborate basate su ipotesi più ampie.

  18. Student Reception, Awards Ceremony, and Dance Party

    Science.gov (United States)

    2014-03-01

    In the first part of this event, SPS will award winning undergraduate students for outstanding oral and poster presentations. New this year-Club Physics! Join us for a fun dance party after the awards ceremony. Light refreshments will be served.

  19. Entropy a la Boltzmann

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 6; Issue 9. Entropy à la Boltzmann. Jayanta K Bhattacharjee. General Article Volume 6 Issue 9 September 2001 pp 19-34. Fulltext. Click here to view fulltext PDF. Permanent link: http://www.ias.ac.in/article/fulltext/reso/006/09/0019-0034. Author Affiliations.

  20. Ludluig Eduard Boltzmann

    Indian Academy of Sciences (India)

    Page 1. CPMGlKAlBGE-340/2001. Licenced to post WPP(E) No.6. Resonance - September 2001. Ludluig Eduard Boltzmann. (1844 - 19(6). Registered with Registrar of Newspapers in India vide Regn. No. 66273196. ISSN 0971-8044.

  1. Blackboard Wins Payment from Competitor in Patent Case

    Science.gov (United States)

    Mangan, Katherine

    2008-01-01

    A federal jury in Texas awarded Blackboard Inc. $3.1-million last month, saying that a smaller Canadian competitor, Desire2Learn Inc., had infringed Blackboard's patent for a system of delivering course materials online. The case has been closely watched by campus-technology officials, many of whom feared that a Blackboard win could stifle…

  2. Engineering students win autonomous vehicle competition for third year

    OpenAIRE

    Crumbley, Liz

    2006-01-01

    For the third year in a row, the Virginia Tech College of Engineering's Autonomous Vehicle Team swept the international Intelligent Ground Vehicle Competition (IGVC), winning best and second-best overall and placing first in the three top event categories. The team of mechanical engineering (ME) students also was awarded $15,000 in prize money.

  3. Ludwig Edward Boltzmann

    OpenAIRE

    Rajasekar, S.; Athavan, N.

    2006-01-01

    In this manuscript we present a brief life history of Ludwig Edward Boltzmann and his achivements. Particularly, we discuss his H-theorem, his work on entropy and statistical interpretation of second-law of thermodynamics. We point out his some other contributions in physics, characteristics of his work, his strong support on atomism, character of his personality and relationship with his students and final part of his life.

  4. Telling Tales about Gender: A Critical Analysis of Caldecott Medal-Winning Picturebooks, 1938-2011

    Science.gov (United States)

    Crisp, Thomas; Hiller, Brittany

    2011-01-01

    In the world of children's literature, analyses of the distribution and representation of gender, biological sex, and gendered behavior in picturebooks often focused on Caldecott Award-winning literature. As the most prestigious award for American children's picturebooks, titles that receive this honor have a profound influence on the field of…

  5. Successful Undergraduate Research: Creating Win-Win-Win

    Science.gov (United States)

    Guswa, A. J.; Rhodes, A. L.

    2003-12-01

    Undergraduate involvement in research has the potential to advance science, enhance education, strengthen the research community, and raise general awareness of the importance and impact of scientific understanding. Rather than being competing objectives, these goals are synergistic. Effective research experiences are those that create win-win-win situations: benefits to the student, benefits to the project, and benefits to the scientific community. When structured appropriately, undergraduate research fits into a learner-centered paradigm that puts emphasis on student learning, rather than instructor teaching. Under such a paradigm the student and professor learn together, constructing knowledge by integrating information with critical-thinking and problem-solving skills, and use this knowledge to address issues in real-life contexts. Creating such a learning environment requires that the professor be vested in the outcome of the research, that the student take a meta-cognitive approach to the project and work at a level appropriate to her abilities, and that the student understand how her contribution fits into the project and the larger field. All of these factors lead to greater independence, confidence, and productivity on the part of the student. By providing undergraduates with these experiences, we introduce not only future scientists but also non-scientists to the excitement of discovery and the value of scientific research. Currently, we involve undergraduates in our research on the hydrology and geochemistry of a tropical montane cloud forest in Monteverde, Costa Rica. At the start of each student's involvement, we provide her with the big picture: our project goals, the relevant social issues, and the importance of watershed research. Each student then articulates her own educational and project objectives. Together, we choose tasks that match her skills and interests with our scholarly work. Specific activities range from literature review to

  6. The last SPR dinner awards

    Science.gov (United States)

    Tsurutani, Bruce

    1992-03-01

    Because the Solar-Planetary Relationships section of AGU has officially changed its name to Space Physics and Aeronomy (SPA), the December 10, 1991, section dinner award ceremony at the AGU Fall Meeting in San Francisco was the last of the series. Presumably an SPA dinner award series will be started under President-elect Andy Nagy.We have followed our tradition of recognizing the special talents of section members at the annual dinner. This year we had eight awardees. These awards are given in fun and are intended to be humorous. The selection committee defining the awards (the awards are changed regularly to keep people from trying to win one) and selecting the awardees will have to remain anonymous. (The committee is similar to Skull and Bones, but we are politically correct in that we allow women as members.)

  7. American School & University Architectural Portfolio 2000 Awards: Landscape Architecture.

    Science.gov (United States)

    American School & University, 2000

    2000-01-01

    Presents photographs and basic information on architectural design, costs, square footage, and principle designers of the award winning school landscaping projects that competed in the American School & University Architectural Portfolio 2000. (GR)

  8. Presidential Green Chemistry Challenge: 2012 Small Business Award

    Science.gov (United States)

    Presidential Green Chemistry Challenge 2012 award winner, Elevance Renewable Sciences, used Nobel-prize-winning metathesis catalysis to produce high-value difunctional chemicals from renewable feedstocks including natural oils.

  9. Winning Cores in Parity Games

    DEFF Research Database (Denmark)

    Vester, Steen

    2016-01-01

    in their own right. In particular, we show that the winning core and the winning region for a player in a parity game are equivalently empty. Moreover, the winning core contains all fatal attractors but is not necessarily a dominion itself. Experimental results are very positive both with respect to quality...

  10. Indemnification: Win/lose or win/win

    Energy Technology Data Exchange (ETDEWEB)

    Booth, G.M.

    1996-08-01

    Some of you may be wondering how an oil company employee came to be speaking on indemnity. I`ve been wondering that myself and have even considered the possibility that the conference thought it might be interesting to have a presentation in which the sacrificial lamb is led to the slaughter. I hope that`s not the case. I am not speaking today as a representative of Conoco or as a spokesperson for the operator perspective. I do not intend to tell you what position to take with respect to contractual indemnification. My purpose is to share with you some of my thoughts on indemnification and provide you with some perspective in which to consider your own objectives in structuring indemnities and evaluate whether your current positions meet those objectives. What is contractual indemnification? To some, it is a vehicle by which to transfer all the risk inherent in their operations to another party. Others view it as a means of protecting a deductible or self-insured retention. Some think of it as a bloodbath. There are a few who believe that it is a game in which the only way to win is to ensure the other party loses. The states of Texas and Louisiana believe contractual indemnities are {open_quotes}inequities foisted on certain contractors.{close_quotes} I would like to propose that indemnity can be nothing more than an economic transaction which attempts to allocate risk in a cost effective manner.

  11. Training Restricted Boltzmann Machines

    DEFF Research Database (Denmark)

    Fischer, Asja

    Restricted Boltzmann machines (RBMs) are probabilistic graphical models that can also be interpreted as stochastic neural networks. Training RBMs is known to be challenging. Computing the likelihood of the model parameters or its gradient is in general computationally intensive. Thus, training re...... of the applied sampling procedure and I will introduce a transition operator that leads to faster mixing. Finally, a different parametrisation of RBMs will be discussed that leads to better learning results and more robustness against changes in the data representation....... relies on sampling based approximations of the log-likelihood gradient. I will present an empirical and theoretical analysis of the bias of these approximations and show that the approximation error can lead to a distortion of the learning process. The bias decreases with increasing mixing rate...

  12. Memory for future gambling wins.

    Science.gov (United States)

    Scoboria, Alan; Wilson, Tobi

    2011-09-01

    Analogous to false memories for the past, gambling behavior may be influenced by the development of vivid, believed false "memories" for future gambling outcomes. We examined the degree to which believed memory-like representations for future gambling wins and losses were associated with prior substantial win experiences, frequency of gambling, risk for problem gambling, and other types of gambling expectancies. Regular gamblers with and without prior substantial wins rated the strength of a specific outcome expectancy, their belief that substantial gambling wins and losses would occur in the future, and rated the strength of "memory" for future gambling wins and losses. They then described a future win and a future loss and rated memory-like phenomenal characteristics for these events. Prior winners rated future wins as more believable relative to future losses, and rated future gambling outcomes as more memory-like than did gamblers without prior win experiences. Belief and memory for future wins correlated positively with frequency of gambling and positive response expectancies (e.g. relaxation when gambling). Belief and memory for future losses correlated with negative outcome expectancies and endorsement of problem gambling risk. Expecations about future wins and losses are likely influenced by believed memory-like representations for future wins and losses. (c) 2011 APA, all rights reserved.

  13. 2014 WIN3 Workshop

    CERN Document Server

    Long, Ling; Pries, Rachel; Stange, Katherine

    2016-01-01

    Exploring the interplay between deep theory and intricate computation, this volume is a compilation of research and survey papers in number theory, written by members of the Women In Numbers (WIN) network, principally by the collaborative research groups formed at Women In Numbers 3, a conference at the Banff International Research Station in Banff, Alberta, on April 21-25, 2014. The papers span a wide range of research areas: arithmetic geometry; analytic number theory; algebraic number theory; and applications to coding and cryptography. The WIN conference series began in 2008, with the aim of strengthening the research careers of female number theorists. The series introduced a novel research-mentorship model: women at all career stages, from graduate students to senior members of the community, joined forces to work in focused research groups on cutting-edge projects designed and led by experienced researchers. The goals for Women In Numbers 3 were to establish ambitious new collaborations between women i...

  14. The 1992 and 1993 Carter G. Woodson Book Awards.

    Science.gov (United States)

    Banks, Cherry A. McGee; La Grone, Susan

    1994-01-01

    States that the Carter G. Woodson Book Award was established to encourage the writing, publishing, and dissemination of outstanding social science books that treat ethnic minority and race relation issues sensitively and accurately. Presents an annotated bibliography of the 12 award-winning books for 1992-93. (CFR)

  15. Arthur Ashe Jr. Sports Scholars Awards 2011

    Science.gov (United States)

    Elfman, Lois; Walker, Marlon A.

    2011-01-01

    "Diverse: Issues In Higher Education" established the Sports Scholars Awards to honor undergraduate students of color who have made achieving both academically and athletically a winning combination. Inspired by tennis legend Arthur Ashe Jr.'s commitment to education as well as his love for the game of tennis, "Diverse" invites every college and…

  16. Arthur Ashe Jr. Sports Scholars Awards 2010

    Science.gov (United States)

    Elfman, Lois; Ford, William J.

    2010-01-01

    "Diverse: Issues In Higher Education" established the Sports Scholars Awards to honor undergraduate students of color who have made achieving both academically and athletically a winning combination. Inspired by tennis legend Arthur Ashe Jr.'s commitment to education as well as his love for the game of tennis, they invite every college and…

  17. Winning, losing, and violence.

    Science.gov (United States)

    Sivarajasingam, V; Moore, S; Shepherd, J P

    2005-04-01

    Although international sports events attract huge interest, and results can be a barometer of popular national standing, their impact on violent behaviour has not been investigated. Associations between assault related emergency department (ED) attendances and international sporting events (home and away rugby and soccer matches) in a European capital city (Cardiff) served by one ED, between 1 May 1995 and 30 April 2002 were investigated. The frequency of assault related ED attendances were studied relative to whether the national team won or lost, controlling for potential covariates: match attendance, match location (home/away), results (win/lose), net scores, and day of match (weekend/weekday). Multiple linear regression was used to identify significant associations with ED assault related attendances. Matches which the Wales team won (p = 0.03), match attendance (pSport type made no difference. Violence prevention efforts should be increased on international match days, when the national team is expected to win, when match attendance is large, and for away as well as home matches.

  18. Temperature based Restricted Boltzmann Machines

    Science.gov (United States)

    Li, Guoqi; Deng, Lei; Xu, Yi; Wen, Changyun; Wang, Wei; Pei, Jing; Shi, Luping

    2016-01-01

    Restricted Boltzmann machines (RBMs), which apply graphical models to learning probability distribution over a set of inputs, have attracted much attention recently since being proposed as building blocks of multi-layer learning systems called deep belief networks (DBNs). Note that temperature is a key factor of the Boltzmann distribution that RBMs originate from. However, none of existing schemes have considered the impact of temperature in the graphical model of DBNs. In this work, we propose temperature based restricted Boltzmann machines (TRBMs) which reveals that temperature is an essential parameter controlling the selectivity of the firing neurons in the hidden layers. We theoretically prove that the effect of temperature can be adjusted by setting the parameter of the sharpness of the logistic function in the proposed TRBMs. The performance of RBMs can be improved by adjusting the temperature parameter of TRBMs. This work provides a comprehensive insights into the deep belief networks and deep learning architectures from a physical point of view.

  19. "Is This a Boy or a Girl?": Rethinking Sex-Role Representation in Caldecott Medal-Winning Picturebooks, 1938-2011

    Science.gov (United States)

    Crisp, Thomas; Hiller, Brittany

    2011-01-01

    A number of previous studies have addressed gender role-stereotyping in Caldecott Award-winning picturebooks. Building upon the extensive scholarship examining representations of females in Caldecott books, this current study offers a critical investigation of how gender is represented in Caldecott Medal-winning literature from 1938 to 2011 by…

  20. WIN Belarus report 2007

    Energy Technology Data Exchange (ETDEWEB)

    Vastchenko, Svetlana [Institute of Power and Nuclear Research, Sosny (Belarus)

    2008-07-01

    national WIN: WIN Belarus was established in December 1998 and at present has 17 members. Highlights of the last year and trends in Belarus: There are some problems with the natural gas supply in Belarus from Russia. Energy policy directed to use the local fuel resources and energy saving, but these resources can not provide for Belarus energy demand. Therefore made a decision of NPP construction. At present the NPP site is selected. WIN activities: Collection and analysis of articles in newspapers and journals on energy problems in Belarus and construction of nuclear power plant in our republic. Publication and distribution of newsletters on nuclear problems for public information and authorities, which are available for the press too. We took part in debates with environmental and other opponents on the ecological, economical and safety problems of nuclear technology. We published articles about nuclear energy (safety problems, environment and climate). Female communication: Collaboration with women organizations in Belarus (Women Alliance, Women group in physics and others). Future plans and goals for WIN: Participation in several international conferences and seminars. Publication and distribution of newsletters on nuclear problems for public information and authorities, which are available for the press too. Collection and analysis of articles in newspapers and journals on energy problems in Belarus and construction of nuclear power plant in our republic. Publication articles in newspapers and 'Industrial Safety' journal about using nuclear technology and radiation and power problems. Investigation problems of radioactive waste handling. Preparation trainings for journalists and public organizations on radiation problems, nuclear power and on un-traditional renewed sources of energy. We shall continue debates with opponents on the ecological, economical and safety problems of NPP. Collaboration with women and ecological organizations in Belarus (Women

  1. WIN-T/JTRS Migration

    Science.gov (United States)

    2010-01-01

    Development and Integration Directorate, SIGCOE converted the data in order to support the modeling and simulation tools used by PM WIN-T. WIN-T uses...seldom achievable by any other means. Systems engineers use the results of modeling and simulation to help drive network design decisions...FDC and FDI ) and Army G3/5/7 in order to draw a “line in the sand” and move toward a WIN-T provided transport capability for all TS/ SCI users. The

  2. The effects of national cash awards for science teaching on recipients and their peers

    Science.gov (United States)

    Weld, Jeffrey Donn

    Cash teaching awards available to science teachers in the U.S. have goals to improve science teaching. This study assessed the effectiveness of five national cash award programs at identifying exemplars and inspiring better science teaching. Award winning secondary science teachers provided their perceptions of the effects of an award on their own teaching and on the profession as a whole. Randomly selected secondary science teachers across the U.S. reported their perceptions of the effects of the existence of awards on their own teaching and on the profession. Program directors for the five national cash awards were interviewed to determine the intentions and strategies of their award programs. The criteria that guide the selection of award winners were found to align with research-supported exemplar characteristics, but the methods used for identifying outstanding teachers were found to be inadequate for that purpose. Award winning science teachers perceive awards to result from, rather than to inspire, good teaching. Their motivation derives from student achievement and a job well done. The valued effects of winning an award are the recognition and increased respect that follow. Award winners perceive awards as difficult to win, minimally motivating, and frequently causing of dissension among peers. In most respects award winners perceive increased intrinsic rewards to accompany recognition through cash awards. Randomly selected U.S. science teachers who have not won cash awards perceive them as poor motivational incentives because too few awards exist, the basis for recognition is unclear, and the award itself is not a valued outcome. Most science teachers consider themselves good teachers and would apply for an award despite doubts that they would win. Direct comparisons reveal that winners and nonwinners have widely divergent opinions of awards. Winners of lesser cash amounts have the same perceptions of awards as winners of greater cash amounts. Effective

  3. Wins, winning and winners: the commercial advertising of lottery gambling.

    Science.gov (United States)

    McMullan, John L; Miller, Delthia

    2009-09-01

    This study analyzed a sample of 920 lottery ads that were placed or played in Atlantic Canada from January 2005 to December 2006. A content analysis, involving quantitative and qualitative techniques, was conducted to examine the design features, exposure profiles and focal messages of these ads and to explore the connections between lottery advertising and consumer culture. We found that there was an "ethos of winning" in these commercials that provided the embedded words, signs, myths, and symbols surrounding lottery gambling and conveyed a powerful imagery of plentitude and certitude in a world of potential loss where there was little reference to the actual odds of winning. The tangible and emotional qualities in the ads were especially inviting to young people creating a positive orientation to wins, winning and winners, and lottery products that, in turn, reinforced this form of gambling as part of youthful consumption practices. We concluded that enticing people with the prospects of huge jackpots, attractive consumer goods and easy wins, showcasing top prize winners, and providing dubious depictions that winning is life-changing was narrow and misleading and exploited some of the factors associated with at-risk gambling.

  4. COLLIDE Pro Helvetia Award

    CERN Multimedia

    2016-01-01

    The COLLIDE Pro Helvetia Award is run in partnership with Pro Helvetia, giving the opportunity to Swiss artists to do research at CERN for three months.   From left to right: Laura Perrenoud, Marc Dubois and Simon de Diesbach. The photo shows their VR Project, +2199. Fragment.In are the winning artists of COLLIDE Pro Helvetia. They came to CERN for two months in 2015, and will now continue their last month in the laboratory. Fragment.In is a Swiss based interaction design studio. They create innovative projects, interactive installations, video and game design. Read more about COLLIDE here.

  5. WINS. Market Simulation Tool for Facilitating Wind Energy Integration

    Energy Technology Data Exchange (ETDEWEB)

    Shahidehpour, Mohammad [Illinois Inst. of Technology, Chicago, IL (United States)

    2012-10-30

    results are often text-based demonstrations. WINS includes a powerful visualization tool and user interface capability for transmission analyses, planning, and assessment, which will be of great interest to power market participants, power system planners and operators, and state and federal regulatory entities; and (3) WINS can handle extended transmission models for wind integration studies. WINS models include limitations on transmission flow as well as bus voltage for analyzing power system states. The existing decision tools often consider transmission flow constraints (dc power flow) alone which could result in the over-utilization of existing resources when analyzing wind integration. WINS can be used to assist power market participants including transmission companies, independent system operators, power system operators in vertically integrated utilities, wind energy developers, and regulatory agencies to analyze economics, security, and reliability of various options for wind integration including transmission upgrades and the planning of new transmission facilities. WINS can also be used by industry for the offline training of reliability and operation personnel when analyzing wind integration uncertainties, identifying critical spots in power system operation, analyzing power system vulnerabilities, and providing credible decisions for examining operation and planning options for wind integration. Researches in this project on wind integration included (1) Development of WINS; (2) Transmission Congestion Analysis in the Eastern Interconnection; (3) Analysis of 2030 Large-Scale Wind Energy Integration in the Eastern Interconnection; (4) Large-scale Analysis of 2018 Wind Energy Integration in the Eastern U.S. Interconnection. The research resulted in 33 papers, 9 presentations, 9 PhD degrees, 4 MS degrees, and 7 awards. The education activities in this project on wind energy included (1) Wind Energy Training Facility Development; (2) Wind Energy Course

  6. The Methods Behind PH WINS

    OpenAIRE

    Leider, Jonathon P.; Bharthapudi, Kiran; Pineau, Vicki; Liu, Lin; Harper, Elizabeth

    2015-01-01

    The Public Health Workforce Interests and Needs Survey (PH WINS) has yielded the first-ever nationally representative sample of state health agency central office employees. The survey represents a step forward in rigorous, systematic data collection to inform the public health workforce development agenda in the United States. PH WINS is a Web-based survey and was developed with guidance from a panel of public health workforce experts including practitioners and researchers. It draws heavily...

  7. In the winning mood

    Directory of Open Access Journals (Sweden)

    Marieke de Vries

    2008-01-01

    Full Text Available The present research aimed to test the role of mood in the Iowa Gambling Task (IGT; Bechara et al., 1994. In the IGT, participants can win or lose money by picking cards from four different decks. They have to learn by experience that two decks are overall advantageous and two decks are overall disadvantageous. Previous studies have shown that at an early stage in this card-game, players begin to display a tendency towards the advantageous decks. Subsequent research suggested that at this stage, people base their decisions on conscious gut feelings (Wagar and Dixon, 2006. Based on empirical evidence for the relation between mood and cognitive processing-styles, we expected and consistently found that, compared to a negative mood state, reported and induced positive mood states increased this early tendency towards advantageous decks. Our results provide support for the idea that a positive mood causes stronger reliance on affective signals in decision-making than a negative mood.

  8. Maxwell Paper Anthology. Award-Winning Papers AY 2010

    Science.gov (United States)

    2011-04-01

    Chikungunya virus Eastern equine encephalitis Q fever Rift Valley fever Tularemia Venezuelan equine encephalitis Western equine encephalitis...encephalitis. Rift Valley fever, and eastern equine encephalitis vaccines) to full licensure. Additionally, the inferior pri- ority of infectious-disease...communist troops were killed. 4.534 wounded , and 2,328 captured. 11. John Norton Moore. "Legal Dimensions of the Decision to Intercede in Cambo- dia

  9. Award-winning machine boosts sorghum farming in Sudan | IDRC ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2016-04-28

    Apr 28, 2016 ... Mobilizing local safety nets for enhanced adaptive capacity to climate change in Zimbabwe. In Zimbabwe, the increased frequency of drought, flash floods, and unpredictable rainfall has added to recurrent food deficits for poor households. View moreMobilizing local safety nets for enhanced adaptive ...

  10. PASTE plus teams at core of award-winning program.

    Science.gov (United States)

    2004-11-01

    PASTE is a customized version of the Six Sigma DMAIC model. Best practices should not be taken at face value; you must have your own data to analyze. Develop a specific measurement plan for each project to accurately determine level of success.

  11. Alan Guth and Andrei Linde win international cosmology award

    CERN Multimedia

    2004-01-01

    "Leading theoretical cosmologists Alan Guth, Weisskopf Professor of Physics at the Massachusetts Institute of Technology, and Andrei Linde, Professor of Physics at Stanford University, who played prominent roles in developing and refining the theory of cosmic inflation, have been selected by an international panel of experts to receive the 2004 Cosmology Prize of the Peter Gruber Foundation" (1 page).

  12. Clean Cities Award Winning Coalition: Salt Lake City

    Energy Technology Data Exchange (ETDEWEB)

    ICF Kaiser

    1999-05-20

    Since its designation as a national Clean City in 1994, Salt Lake Clean Cities has put more than 2,600 alternative fuel vehicles (AFVs) on community streets. The 82 business, nonprofit, and government agencies that comprise the coalition are all dedicated to cleaning the air by reducing vehicle exhaust. Salt Lake Clean Cities has the third largest compressed natural gas and propane-refueling infrastructure in the country, with 98 locations available. They sponsor an annual ''Spring Soiree'' to increase public awareness about the program and educate the public about the benefits of alternative fuel and AFVs.

  13. IDRC-supported documentary A Walnut Tree wins awards at ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2016-06-30

    Jun 30, 2016 ... A Walnut Tree follows the lives of Baba, an elderly poet and former teacher, and his family, who were forced to flee their home because of the ongoing conflict between the Pakistani army and the Taliban. The internally displaced family live in a makeshift shelter in the Jalozai settlement near Peshawar in ...

  14. Heavy Water Vodka: flawless purity and award winning design

    OpenAIRE

    Storås, Arill; Sandbu, Kristoffer; Eriksen, Sandra Kristine; Isene, Frode

    2008-01-01

    This thesis presents the findings from an explorative research study of the Chinese vodka market. The research has been conducted on behalf of Heavy Water International, a Norwegian vodka producer. Heavy Water International believes that the vodka market in China has considerable growth potential the next 5-10 years, and wants to enter the Chinese vodka market within 2008. Their first goal is to establish a good distributor-connection and create brand awareness. Heavy Water ...

  15. It Won't Win an Academy Award

    Science.gov (United States)

    Rathz, David V.

    1972-01-01

    The author and a colleague introduced a program where the students decided what they would learn for the year. The result was a film designed, researched, acted and produced by the students. The process of filming Of Mice and Men" rather than the product counted the most. (Author/AS)

  16. Win-win Imageries in a Soap Bubble World

    DEFF Research Database (Denmark)

    Ekman, Susanne

    2015-01-01

    , ranging from New Public Management, over corporate culture, to project work. Each of these trends claims to transcend paradoxes by making contradictory extremes enhance each other rather than hamper each other. This is partly made possible by an increasing immateriality of both money and labor, I argue......This article explores the imagery and notions of personhood underlying the willingness to undertake extreme work among creative knowledge workers. The core argument is that extreme work is informed by pervasive win-win fantasies which can be recognized in a number of current organizational trends....... Drawing on empirical data from creative knowledge industries, this article illustrates how ‘win-win’ workers subscribe to a set of norms promising that extreme work is a ticket to Never-Never Land. These norms are progression, passion, indispensability, and individual agency. The empirical analysis shows...

  17. Win at Work! The Everybody Wins Approach to Conflict Resolution

    CERN Document Server

    Katz, Diane

    2010-01-01

    Proven techniques for resolving workplace conflicts. After years of seeing clients struggling and their businesses suffering with destructive conflicts, Diane Katz developed The Working Circle, a step-by-step process that helps everyone in business resolve conflict in a non-confrontational, creative, collaborative way. Win at Work! provides you with a no-nonsense guide based on real-life examples of people at pivotal points in their careers. Filled with practical wisdom, it reveals how you can move around the roadblocks that, if left unattanded, can stop you in your tracks. Win at Work! also h

  18. CMS Awards

    CERN Multimedia

    2004-01-01

    Ali Mohammad Rafiee receives the CMS Gold Award from Michel Della Negra of CMS. As part of the fifth annual CMS Awards, Iranian contractor HEPCO, located in Arak, an industrial town 200 km west of Tehran, received their Gold Award in a ceremony held on 14 June 2004 (the other award winners were reported in bulletin 13/2004). The Awards are given each year to a small number of the approximately one thousand contractors working on the CMS project. Gold Awards are given for outstanding technical achievement in work carried out for the detector. HEPCO received the Award for the excellent quality of their work in constructing two 25 tonne support tables, two 75 tonne shields (FCS) and eight supporting brackets to lower the HF into the cavern. Welds and machining obtained tolerances that were very difficult in structures of that size. Mr. A. M. Rafiee, the General Manager of the company, acknowledged the benefits of this collaboration, and thanked the efforts and skills of the many staff involved.

  19. Lattices for the lattice Boltzmann method.

    Science.gov (United States)

    Chikatamarla, Shyam S; Karlin, Iliya V

    2009-04-01

    A recently introduced theory of higher-order lattice Boltzmann models [Chikatamarla and Karlin, Phys. Rev. Lett. 97, 190601 (2006)] is elaborated in detail. A general theory of the construction of lattice Boltzmann models as an approximation to the Boltzmann equation is presented. New lattices are found in all three dimensions and are classified according to their accuracy (degree of approximation of the Boltzmann equation). The numerical stability of these lattices is argued based on the entropy principle. The efficiency and accuracy of many new lattices are demonstrated via simulations in all three dimensions.

  20. 2011 EnergyValue Housing Award Report

    Energy Technology Data Exchange (ETDEWEB)

    Sagan, D. [NAHB Research Center, Upper Marlboro, MD (United States); Del Bianco, M. [NAHB Research Center, Upper Marlboro, MD (United States); Wood, A. [NAHB Research Center, Upper Marlboro, MD (United States)

    2012-10-01

    This report details the simulation tool(s) and energy modeling methodology followed in making the energy efficiency estimates, and documents the estimated performance of the EVHA award-winning houses in comparison with the Building America Benchmark and the associated House Simulation Protocols. A summary of each building and its features is included with a brief description of the project and the judges’ comments.

  1. Great comeback rates AHA award. Franciscan Children's develops less costly, alternative programs to save hospital.

    Science.gov (United States)

    Herreria, J

    1998-01-01

    After struggling financially for several years, Boston-based Franciscan Children's Hospital wins the coveted "Great Comeback of the Year" award. With the award, the hospital produces a PR campaign that resulted a plethora of television, print and radio stories. Officials of the Franciscan Children's Hospital announced its financial soundness and commitment to its Boston market area.

  2. C. Cybele Raver: Award for Distinguished Contributions of Applications of Psychology to Education and Training

    Science.gov (United States)

    American Psychologist, 2012

    2012-01-01

    Presents a short biography of the 2012 winner of the American Psychological Association's Award for Distinguished Contributions of Applications of Psychology to Education and Training. C. Cybele Raver is a prolific and award-winning writer who has published widely and served as a reviewer on many high-quality journals. Her publications are well…

  3. Risk and Reward: Perspectives on the Implementation of Kentucky's School-Based Performance Award Program.

    Science.gov (United States)

    Kelley, Carolyn; Protsik, Jean

    1997-01-01

    Provides a qualitative analysis of the Kentucky school-based performance award program at four elementary and two secondary schools. Teachers were motivated to modify teaching approaches to enhance student performance, but seemed to be experiencing high stress levels. Teachers and principals at the six award-winning schools reported attitudes and…

  4. Thermodynamic stabilities of the generalized Boltzmann entropies

    Science.gov (United States)

    Wada, Tatsuaki

    2004-09-01

    We consider the thermodynamic stability conditions (TSC) on the Boltzmann entropies generalized by Tsallis’ q- and Kaniadakis’ κ-deformed logarithmic functions. It is shown that the corresponding TSCs are not necessarily equivalent to the concavity of the generalized Boltzmann entropies with respect to internal energy. Nevertheless, both the TSCs are equivalent to the positivity of standard heat capacity.

  5. Who Will Win the Toss?

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 3; Issue 4. Who Will Win the Toss? H Ramesh V Vinay. General Article Volume 3 Issue 4 April 1998 pp 72-87 ... Author Affiliations. H Ramesh1 V Vinay1. Department of Computer Science, Indian Institute of Science, Bangalore 560 012, India ...

  6. Competitive Sport, Winning and Education.

    Science.gov (United States)

    Arnold, Peter J.

    1989-01-01

    Analyzes the arguments against including competitive sports in the compulsory curriculum. Considers the adverse effects of selfishness and the emphasis upon winning and discusses the role of the teacher in competitive sports. Concludes that teachers can avoid miseducation by altering the value orientation, appealing to rationality, and becoming…

  7. Win a lift to the future!

    CERN Multimedia

    CERN Bulletin

    2010-01-01

    The Communication Group is organising a competition offering people at CERN the chance to submit their ideas and win a ticket to the Lift10 Conference, which will be held in Geneva from 5 to7 May.   Lift is a community of technology "pioneers", created in 2006. It now involves more than 4,000 people from over 60 countries, who meet regularly in Europe and in Asia to explore the social implications of new technologies and the major shifts ahead. CERN is one of the academic partners of the next Lift conference, whose theme is "Connected people”. For this occasion, 10 free tickets to the conference will be awarded to the "CERNois" who come up with the best answers to the question: “How would you contribute to Lift10?” Those taking part in the competition can choose from among the following categories: - run workshop(s); - cover the conference on a blog; - coordinate a discussion during the breaks; - organize a lift@home ...

  8. Lattice Boltzmann simulations of genuinely multidimensional rarefied flows in microchannels

    Science.gov (United States)

    Dellar, Paul; Reis, Tim

    2012-11-01

    We present lattice Boltzmann simulations of rarefied slip flows driven by applied pressure differences across microchannels of finite length. We correctly capture the nonlinear streamwise pressure variation and the cross-channel velocity component, as well as the streamwise velocity and volume flux. The former effects are both absent from almost all previous work that approximated the pressure difference using a uniform body force. We demonstrate second-order convergence of both velocity components towards the asymptotic solution for long microchannels, and slower convergence of the pressure. We use the standard lattice Boltzmann formulation that reduces to a second-order recurrence relation for the streamwise velocity in uniform shear, and whose analytical solution gives a parabolic profile from wall to wall. We therefore cannot capture Knudsen boundary layers, but instead implement Maxwell-Navier slip boundary conditions directly on the hydrodynamic moments of our discrete velocity model. Our only parameter is the tangential momentum accommodation coefficient, so we require no fitting to known solutions. Our moment-based approach shows that existing boundary conditions impose conditions on higher non-hydrodynamic moments rather than on the tangential fluid velocity itself. Supported by Award No. KUK-C1-013-04 made by King Abdullah University of Science and Technology (KAUST) and by EPSRC grant EP/E054625/1.

  9. Patient's Choice Award - a chance to say thank you.

    Science.gov (United States)

    Cole, Elaine

    2016-12-14

    'Winning the Patient's Choice Award has been the highlight of my career so far. And having been nominated by a patient and then voted for by the public, it has reinforced that what I do does make a difference,' says lead bowel function clinical nurse specialist Kelly Stackhouse.

  10. Virginia Tech Professor Receives Award from Non-profit Research Group

    OpenAIRE

    Newbill, Sarah

    2003-01-01

    Alnoor Ebrahim, assistant professor of urban affairs and planning at Virginia Tech's Washington-Alexandria Architecture Center in Alexandria, Va., will be awarded the 2003 "Nonprofit and Voluntary Sector Quarterly" Article Award from the Association for Research on Nonprofit Organizations and Voluntary Action at their annual conference in Colorado on Nov. 21. He was one of two recipients of this award and wins a $500 cash prize for his article, "Information Struggles: The Role of Information ...

  11. Thermal cascaded lattice Boltzmann method

    CERN Document Server

    Fei, Linlin

    2016-01-01

    In this paper, a thermal cascaded lattice Boltzmann method (TCLBM) is developed in combination with the double-distribution-function (DDF) approach. A density distribution function relaxed by the cascaded scheme is employed to solve the flow field, and a total energy distribution function relaxed by the BGK scheme is used to solve temperature field, where two distribution functions are coupled naturally. The forcing terms are incorporated by means of central moments, which is consistent with the previous force scheme [Premnath \\emph{et al.}, Phys. Rev. E \\textbf{80}, 036702 (2009)] but the derivation is more intelligible and the evolution process is simpler. In the method, the viscous heat dissipation and compression work are taken into account, the Prandtl number and specific-heat ratio are adjustable, the external force is considered directly without the Boussinesq assumption, and the low-Mach number compressible flows can also be simulated. The forcing scheme is tested by simulating a steady Taylor-Green f...

  12. Hero Award

    Centers for Disease Control (CDC) Podcasts

    2009-10-07

    This podcast is a lecture given by William H. Foege, MD, MPH when he was honored October 7, 2009 as the 2009 CDC Foundation Hero Award Recipient.  Created: 10/7/2009 by Centers for Disease Control and Prevention (CDC).   Date Released: 10/22/2009.

  13. Gold awards for CERN's top suppliers!

    CERN Multimedia

    2003-01-01

    CERN's awards to the LHC project's best suppliers are now into their second year. Three companies received 'Golden Hadrons' for 2003. The Golden Hadron awards were presented to the delighted representatives of the winning firms by LHC Project Leader Lyn Evans on Friday 16 May. Only three out of the LHC's four hundred suppliers were lucky enough to receive a gold award. The consortium IHI (Japan)-Linde Kryotechnik (Switzerland), the Belgian company JDL Technologies and the Japanese firm Furukawa Electric Company were rewarded not only for their technical and financial achievements but also for their compliance with contractual deadlines. The 2003 Golden Hadron winners with Lyn Evans. From left to right: Armin Senn, Thomas Voigt, Kirkor Kurtcuoglu of LINDE KRYOTECHNIK ; Tadaaki Honda, Project Leader and Motoki Yoshinaga, Associate Director of IHI Corporation ; Lyn Evans, LHC Project Leader; Shinichiro Meguro, Managing Director of FURUKAWA ELECTRIC COMPANY ; Nobuyoshi Saji, Consulting Engineer of IHI Corporatio...

  14. The Methods Behind PH WINS.

    Science.gov (United States)

    Leider, Jonathon P; Bharthapudi, Kiran; Pineau, Vicki; Liu, Lin; Harper, Elizabeth

    2015-01-01

    The Public Health Workforce Interests and Needs Survey (PH WINS) has yielded the first-ever nationally representative sample of state health agency central office employees. The survey represents a step forward in rigorous, systematic data collection to inform the public health workforce development agenda in the United States. PH WINS is a Web-based survey and was developed with guidance from a panel of public health workforce experts including practitioners and researchers. It draws heavily from existing and validated items and focuses on 4 main areas: workforce perceptions about training needs, workplace environment and job satisfaction, perceptions about national trends, and demographics. This article outlines the conceptualization, development, and implementation of PH WINS, as well as considerations and limitations. It also describes the creation of 2 new data sets that will be available in public use for public health officials and researchers--a nationally representative data set for permanently employed state health agency central office employees comprising over 10,000 responses, and a pilot data set with approximately 12,000 local and regional health department staff responses.

  15. An introduction to the theory of the Boltzmann equation

    CERN Document Server

    Harris, Stewart

    2011-01-01

    Boltzmann's equation (or Boltzmann-like equations) appears extensively in such disparate fields as laser scattering, solid-state physics, nuclear transport, and beyond the conventional boundaries of physics and engineering, in the fields of cellular proliferation and automobile traffic flow. This introductory graduate-level course for students of physics and engineering offers detailed presentations of the basic modern theory of Boltzmann's equation, including representative applications using both Boltzmann's equation and the model Boltzmann equations developed within the text. It emphasizes

  16. Boltzmann Transport in Hybrid PIC HET Modeling

    Science.gov (United States)

    2015-07-01

    Paper 3. DATES COVERED (From - To) July 2015-July 2015 4. TITLE AND SUBTITLE Boltzmann transport in hybrid PIC HET modeling 5a. CONTRACT NUMBER In...reproduce experimentally observed mobility trends derived from HPHall, a workhorse hybrid- PIC HET simulation code. 15. SUBJECT TERMS 16. SECURITY...Std. 239.18 Boltzmann transport in hybrid PIC HET modeling IEPC-2015- /ISTS-2015-b- Presented at Joint Conference of 30th International

  17. Lattice Boltzmann model for incompressible axisymmetric flows.

    Science.gov (United States)

    Chen, Sheng; Tölke, Jonas; Geller, Sebastian; Krafczyk, Manfred

    2008-10-01

    A lattice Boltzmann model for incompressible axisymmetric flow is proposed in this paper. Unlike previous axisymmetric lattice Boltzmann models, which were based on "primitive-variables" Navier-Stokes equations, the target macroscopic equations of the present model are vorticity-stream-function formulations. Due to the intrinsic features of vorticity-stream-function formulations, the present model is more efficient, more stable, and much simpler than the existing models. The advantages of the present model are validated by numerical experiments.

  18. Lattice Boltzmann approach for complex nonequilibrium flows.

    Science.gov (United States)

    Montessori, A; Prestininzi, P; La Rocca, M; Succi, S

    2015-10-01

    We present a lattice Boltzmann realization of Grad's extended hydrodynamic approach to nonequilibrium flows. This is achieved by using higher-order isotropic lattices coupled with a higher-order regularization procedure. The method is assessed for flow across parallel plates and three-dimensional flows in porous media, showing excellent agreement of the mass flow with analytical and numerical solutions of the Boltzmann equation across the full range of Knudsen numbers, from the hydrodynamic regime to ballistic motion.

  19. Student understanding of the Boltzmann factor

    Directory of Open Access Journals (Sweden)

    Trevor I. Smith

    2015-09-01

    Full Text Available [This paper is part of the Focused Collection on Upper Division Physics Courses.] We present results of our investigation into student understanding of the physical significance and utility of the Boltzmann factor in several simple models. We identify various justifications, both correct and incorrect, that students use when answering written questions that require application of the Boltzmann factor. Results from written data as well as teaching interviews suggest that many students can neither recognize situations in which the Boltzmann factor is applicable nor articulate the physical significance of the Boltzmann factor as an expression for multiplicity, a fundamental quantity of statistical mechanics. The specific student difficulties seen in the written data led us to develop a guided-inquiry tutorial activity, centered around the derivation of the Boltzmann factor, for use in undergraduate statistical mechanics courses. We report on the development process of our tutorial, including data from teaching interviews and classroom observations of student discussions about the Boltzmann factor and its derivation during the tutorial development process. This additional information informed modifications that improved students’ abilities to complete the tutorial during the allowed class time without sacrificing the effectiveness as we have measured it. These data also show an increase in students’ appreciation of the origin and significance of the Boltzmann factor during the student discussions. Our findings provide evidence that working in groups to better understand the physical origins of the canonical probability distribution helps students gain a better understanding of when the Boltzmann factor is applicable and how to use it appropriately in answering relevant questions.

  20. Relativistic entropy and related Boltzmann kinetics

    Energy Technology Data Exchange (ETDEWEB)

    Kaniadakis, G. [Politecnico di Torino (Italy). Dipartimento di Fisica

    2009-06-15

    It is well known that the particular form of the two-particle correlation function, in the collisional integral of the classical Boltzmann equation, fixes univocally the entropy of the system, which turns out to be the Boltzmann-Gibbs-Shannon entropy. In the ordinary relativistic Boltzmann equation, some standard generalizations, with respect to its classical version, imposed by the special relativity, are customarily performed. The only ingredient of the equation, which tacitly remains in its original classical form, is the two-particle correlation function, and this fact imposes that also the relativistic kinetics is governed by the Boltzmann-Gibbs-Shannon entropy. Indeed the ordinary relativistic Boltzmann equation admits as stationary stable distribution, the exponential Juttner distribution. Here, we show that the special relativity laws and the maximum entropy principle suggest a relativistic generalization also of the two-particle correlation function and then of the entropy. The so obtained, fully relativistic Boltzmann equation, obeys the H-theorem and predicts a stationary stable distribution, presenting power law tails in the high-energy region. The ensued relativistic kinetic theory preserves the main features of the classical kinetics, which recovers in the c{yields}{infinity} limit. (orig.)

  1. CMS AWARDS

    CERN Multimedia

    Steven Lowette

    Working under great time pressure towards a common goal in gradual steps can sometimes cause us to forget to take a step back, and celebrate what marvels have been achieved. A general need was felt within CMS to expand the recognition for our young scientists that made outstanding, well recognized and creative contributions to CMS, which served to significantly advance the performance of CMS as a complete and powerful experiment. Therefore, the Collaboration Board endorsed in March 2009 a proposal from the CB Chair and Advisory Group to award each year the newly created "CMS Achievement Award" to fourteen graduate students and postdocs that made exceptional contributions to the Tracker, ECAL, HCAL and Muon subdetectors as well as the TriDAS project, the Commissioning of CMS and the Offline Software and Computing projects. It was also agreed that there was a need to go back in time, and retroactively attribute awards for the years 2007 and 2008 when CMS went from a bare cavern to a detect...

  2. WIN Chapters: Milestones and Future Plans

    Energy Technology Data Exchange (ETDEWEB)

    Castro, P.; Pelegrí, M.

    2015-07-01

    In this paper the WIN Chapters: milestones and future plans are presented. WIN-IAEA has rewarded-in the three last years - to Australia-2014, South-Africa-2013 and Sweden-2012. WIN-Global -specially WiN IAEA- can collaborate a lot with the CTBTO presenting the content of the Treaty on the Non-Proliferation of Nuclear Weapons actually increasing the signatory members in 2015. Historical decisions on NTP are already affecting WiN IAEA. The research reactors or high flux reactors are important in the field of medical applications and other future applications. In Australia women-scientist of OPAL, can become WiN. Between the OPAL applications there is a production of silicon plates to be used in laptops/mobiles. WIN-Europe activities related with the climatic change and with the academic promotion. 2015 is also a very important year due the celebration of 20th Anniversary of WIN-Spain; plans of this Chapter and Conferences of WIN-Global are presented. In addition there are women working in ITER, in some activities in the EU, China, India, Japan, South Korea, USA and Russia both in the academic (R+D) field and into the Industry. (Author)

  3. Essentially Entropic Lattice Boltzmann Model

    Science.gov (United States)

    Atif, Mohammad; Kolluru, Praveen Kumar; Thantanapally, Chakradhar; Ansumali, Santosh

    2017-12-01

    The entropic lattice Boltzmann model (ELBM), a discrete space-time kinetic theory for hydrodynamics, ensures nonlinear stability via the discrete time version of the second law of thermodynamics (the H theorem). Compliance with the H theorem is numerically enforced in this methodology and involves a search for the maximal discrete path length corresponding to the zero dissipation state by iteratively solving a nonlinear equation. We demonstrate that an exact solution for the path length can be obtained by assuming a natural criterion of negative entropy change, thereby reducing the problem to solving an inequality. This inequality is solved by creating a new framework for construction of Padé approximants via quadrature on appropriate convex function. This exact solution also resolves the issue of indeterminacy in case of nonexistence of the entropic involution step. Since our formulation is devoid of complex mathematical library functions, the computational cost is drastically reduced. To illustrate this, we have simulated a model setup of flow over the NACA-0012 airfoil at a Reynolds number of 2.88 ×106.

  4. Opportunistic Cognitive Relaying: A Win-Win Spectrum Sharing Scheme

    Directory of Open Access Journals (Sweden)

    Luo Haiyan

    2010-01-01

    Full Text Available A cost-effective spectrum sharing architecture is proposed to enable the legacy noncognitive secondary system to coexist with the primary system. Specifically, we suggest to install a few intermediate nodes, namely, the cognitive relays, to conduct the spectrum sensing and coordinate the spectrum access. To achieve the goal of win-win between primary and secondary systems, the cognitive relay may act as a cooperator for both of them, and an Opportunistic Cognitive Relaying (OCR scheme is specially devised. In this scheme, the cognitive relay opportunistically switches among three different working modes, that is, Relay for Primary Link (RPL, Relay for Secondary Link (RSL, or Relay for Neither of the Links (RNL, respectively, based on the channel-dependent observation of both systems. In addition, the transmit power for cognitive relay and secondary transmitter in each mode are optimally determined by maximizing the transmission rate of secondary system while keeping or even reducing the outage probability of primary system. Simulation results validate the efficiency of the proposed spectrum sharing scheme.

  5. Interview with Daan Frenkel, Boltzmann Medallist 2016 : Simulating soft matter through the lens of statistical mechanics.

    Science.gov (United States)

    Frenkel, Daan; Louët, Sabine

    2016-06-01

    Daan Frenkel has been awarded the most important prize in the field of statistical mechanics, the 2016 Boltzmann Medal, named after the Austrian physicist and philosopher Ludwig Boltzmann. The award recognises Frenkel's seminal contributions to the statistical-mechanical understanding of the kinetics, self-assembly and phase behaviour of soft matter. The honour recognises Frenkel's highly creative large-scale simulations of soft matter capable of explaining the self-assembly of complex macromolecular systems, colloidal and biomolecular systems. Frenkel is Professor of Theoretical Chemistry at the University of Cambridge, UK and has been Editor in Chief of EPJE between 2010 and 2014. The award will be given to both Frenkel and his French colleague Yves Pomeau, during the StatPhys Conference on 20th July 2016 in Lyon, France. In this interview with Sabine Louët, Frenkel gives his views on statistical physics, which has become more relevant than ever for interdisciplinary research. He also offers some pearls of wisdom for the next generation Statistical Mechanics experts.

  6. Workshop on Recent Issues in Bioanalysis (WRIB) Poster Award winners 2017.

    Science.gov (United States)

    Simmons, Neil; Lowe, John; Coddens, Annelies

    2017-07-01

    The 11th WRIB held in Los Angeles, CA, USA in April 2017. It drew over 750 professionals representing large Pharmas, Biotechs, CROs and multiple regulatory agencies from around the world, from the global bioanalytical community. Bioanalysis and Bioanalysis Zone are very proud to be supporting the WRIB Poster Awards again this year, and we feature the profiles of the authors of the winning posters. Visit www.bioanalysis-zone.com to see the winning posters in full.

  7. Bayesian modeling using WinBUGS

    CERN Document Server

    Ntzoufras, Ioannis

    2009-01-01

    A hands-on introduction to the principles of Bayesian modeling using WinBUGS Bayesian Modeling Using WinBUGS provides an easily accessible introduction to the use of WinBUGS programming techniques in a variety of Bayesian modeling settings. The author provides an accessible treatment of the topic, offering readers a smooth introduction to the principles of Bayesian modeling with detailed guidance on the practical implementation of key principles. The book begins with a basic introduction to Bayesian inference and the WinBUGS software and goes on to cover key topics, including: Markov Chain Monte Carlo algorithms in Bayesian inference Generalized linear models Bayesian hierarchical models Predictive distribution and model checking Bayesian model and variable evaluation Computational notes and screen captures illustrate the use of both WinBUGS as well as R software to apply the discussed techniques. Exercises at the end of each chapter allow readers to test their understanding of the presented concepts and all ...

  8. The Boltzmann equation from quantum field theory

    Energy Technology Data Exchange (ETDEWEB)

    Drewes, Marco, E-mail: marco.drewes@tum.de [Institut fuer Theoretische Teilchenphysik und Kosmologie, RWTH Aachen, 52056 Aachen (Germany); Physik Department T70, Technische Universitaet Muenchen, James Franck Strasse 1, D-85748 Garching (Germany); Mendizabal, Sebastian [Institut fuer Theoretische Physik, Goethe-Universitaet, 60438 Frankfurt am Main (Germany); Weniger, Christoph [Max-Planck-Institut fuer Physik, Foehringer Ring 6, 80805 Muenchen (Germany)

    2013-01-08

    We show from first principles the emergence of classical Boltzmann equations from relativistic nonequilibrium quantum field theory as described by the Kadanoff-Baym equations. Our method applies to a generic quantum field, coupled to a collection of background fields and sources, in a homogeneous and isotropic spacetime. The analysis is based on analytical solutions to the full Kadanoff-Baym equations, using the WKB approximation. This is in contrast to previous derivations of kinetic equations that rely on similar physical assumptions, but obtain approximate equations of motion from a gradient expansion in momentum space. We show that the system follows a generalized Boltzmann equation whenever the WKB approximation holds. The generalized Boltzmann equation, which includes off-shell transport, is valid far from equilibrium and in a time dependent background, such as the expanding universe.

  9. The Boltzmann Equation in Fluorescent Lamp Theory

    Science.gov (United States)

    Lister, Graeme

    Ken Hines was a wonderful mentor in my formative years as a physicist, and a great friend and companion throughout the rest of his life. He introduced me to the Fokker-Planck equation, which formed the basis of my Masters thesis, and showed me how to use it to derive the Boltzmann equation. Many years later, when my research took me into the field of gas discharge lighting, I was to re-discover the Boltzmann equation and apply it to fluorescent lamp modelling. Herein I discuss the important role the electron energy distribution function plays in understanding the physics of fluorescent lamps, and I describe some of the important insights gained from interpreting the Boltzmann equation.

  10. Boltzmann-Electron Model in Aleph.

    Energy Technology Data Exchange (ETDEWEB)

    Hughes, Thomas Patrick; Hooper, Russell

    2014-11-01

    We apply the Boltzmann-electron model in the electrostatic, particle-in-cell, finite- element code Aleph to a plasma sheath. By assuming a Boltzmann energy distribution for the electrons, the model eliminates the need to resolve the electron plasma fre- quency, and avoids the numerical "grid instability" that can cause unphysical heating of electrons. This allows much larger timesteps to be used than with kinetic electrons. Ions are treated with the standard PIC algorithm. The Boltzmann-electron model re- quires solution of a nonlinear Poisson equation, for which we use an iterative Newton solver (NOX) from the Trilinos Project. Results for the spatial variation of density and voltage in the plasma sheath agree well with an analytic model

  11. 2011 EnergyValue Housing Award Report

    Energy Technology Data Exchange (ETDEWEB)

    Sagan, D.; Del Bianco, M.; Wood, A.

    2012-10-01

    This report details the simulation tool(s) and energy modeling methodology followed in making the energy efficiency estimates and documents the estimated performance of the EVHA award winning houses in comparison with the Building America Benchmark and the associated House Simulation Protocols. A summary of each building and its features is included with a brief description of the project and the judges' comments. The purpose of this report is to assess the energy performance of the 2011 EVHA winners as well as align the EVHA Program with the Building America Program.

  12. Celebrating Cercignani's conjecture for the Boltzmann equation

    KAUST Repository

    Villani, Cédric

    2011-01-01

    Cercignani\\'s conjecture assumes a linear inequality between the entropy and entropy production functionals for Boltzmann\\'s nonlinear integral operator in rarefied gas dynamics. Related to the field of logarithmic Sobolev inequalities and spectral gap inequalities, this issue has been at the core of the renewal of the mathematical theory of convergence to thermodynamical equilibrium for rarefied gases over the past decade. In this review paper, we survey the various positive and negative results which were obtained since the conjecture was proposed in the 1980s. © American Institute of Mathematical Sciences.

  13. Multispeed models in off-lattice Boltzmann simulations

    NARCIS (Netherlands)

    Bardow, A.; Karlin, I.V.; Gusev, A.A.

    2008-01-01

    The lattice Boltzmann method is a highly promising approach to the simulation of complex flows. Here, we realize recently proposed multispeed lattice Boltzmann models [S. Chikatamarla et al., Phys. Rev. Lett. 97 190601 (2006)] by exploiting the flexibility offered by off-lattice Boltzmann methods.

  14. IEEE prize awarded to CERN PhD student

    CERN Multimedia

    2006-01-01

    Rafael Ballabriga Suñe is the recipient of the 2006 Institute of Electrical and Electronics Engineers, Inc. (IEEE) Nuclear and Plasma Sciences Society (NPSS)'s Student Paper Award. Ballabriga's winning paper reported on a prototype chip, which belongs to a new generation of single photon counting hybrid pixel detector readout chips - Medipix3. The award was presented by the deputy programme chair Vince Cianciolo (left) at the IEEE Nuclear Science Symposium held in San Diego on 29 October to 4 November.

  15. Quantum Heat Engine and Negative Boltzmann Temperature

    Science.gov (United States)

    Xi, Jing-Yi; Quan, Hai-Tao

    2017-09-01

    To clarify the ambiguity on negative Boltzmann temperature in literature, we study the Carnot and the Otto cycle with one of the heat reservoirs at the negative Boltzmann temperature based on a canonical ensemble description. The work extraction, entropy production and the efficiency of these cycles are explored. Conditions for constructing and properties of these thermodynamic cycles are elucidated. We find that the apparent “violation” of the second law of thermodynamics in these cycles are due to the fact that the traditional definition of thermodynamic efficiency is inappropriate in this situation. When properly understanding the efficiency and the adiabatic processes, in which the system crosses over “absolute ZERO” in a limit sense, the Carnot cycle with one of the heat reservoirs at a negative Boltzmann temperature can be understood straightforwardly, and it contradicts neither the second nor the third law of thermodynamics. Hence, negative Boltzmann temperature is a consistent concept in thermodynamics. We use a two-level system and an Ising spin system to illustrate our central results. Support from the National Science Foundation of China under Grants Nos. 11375012, 11534002, and The Recruitment Program of Global Youth Experts of China

  16. The Quantum Boltzmann Equation in Semiconductor Physics

    OpenAIRE

    Snoke, D. W.

    2010-01-01

    The quantum Boltzmann equation, or Fokker-Planck equation, has been used to successfully explain a number of experiments in semiconductor optics in the past two decades. This paper reviews some of the developments of this work, including models of excitons in bulk materials, electron-hole plasmas, and polariton gases.

  17. Full Boltzmann equations for leptogenesis including scattering

    CERN Document Server

    Hahn-Woernle, F; Wong, Y Y Y

    2009-01-01

    We study the evolution of a cosmological baryon asymmetry produced via leptogenesis by means of the full classical Boltzmann equations, without the assumption of kinetic equilibrium and including all quantum statistical factors. Beginning with the full mode equations we derive the usual equations of motion for the right-handed neutrino number density and integrated lepton asymmetry, and show explicitly the impact of each assumption on these quantities. For the first time, we investigate also the effects of scattering of the right-handed neutrino with the top quark to leading order in the Yukawa couplings by means of the full Boltzmann equations. We find that in our full Boltzmann treatment the final lepton asymmetry can be suppressed by as much as a factor of 1.5 in the weak wash-out regime (K1), the full Boltzmann treatment and the integrated approach give nearly identical final lepton asymmetries (within 10 % of each other at K>3). Finally, we show that the opposing effects of quantum statistics on decays/i...

  18. Two generalizations of the Boltzmann equation

    OpenAIRE

    Biro, T. S.; Kaniadakis, G.

    2005-01-01

    We connect two different generalizations of Boltzmann's kinetic theory by requiring the same stationary solution. Non-extensive statistics can be produced by either using corresponding collision rates nonlinear in the one-particle densities or equivalently by using nontrivial energy composition rules in the energy conservation constraint. Direct transformation formulas between key functions of the two approaches are given.

  19. Globe exhibit wins international acclaim

    CERN Multimedia

    Katarina Anthony

    2011-01-01

    The Globe’s “Universe of Particles” exhibition has recently received four prestigious awards for its avant-garde design. This external praise is great encouragement for the CERN exhibitions currently on the drawing board.   The Universe of Particles exhibition has won 4 awards for its avant-garde design. Back in 2008, the design company Atelier Brückner was presented with a challenge: to design the layout of a new permanent exhibition for CERN, one that would epitomize both the Organization and its research. The brief was concise but complex: the exhibit had to be symbolic of the Organization, use modern technology, engage and immerse visitors, and, preferably, use touch-screen technology. With the help of IArt, an interactive technology firm, and based on the content provided by CERN’s Education Group, Atelier Brückner developed the “Universe of Particles” exhibit as it is today. Its principal concept centred on the s...

  20. A Win-Win-Win Proposition -- Academia and Industry Working Together for Students

    Science.gov (United States)

    Cogswell, J.

    2011-12-01

    geoscience, to include having applied real problem solving via a robust field camp experience. In addition, we look for the maturity and ability to conduct independent research, to integrate broad suites of data, and to work as a team. We look for the ability to communicate results. We do not look for a focus on petroleum. We have many decades of experience in how to best develop that particular discipline quickly, to meet current and future business conditions. There are recurring themes that facilitate successful transition from Academia to a practicing industry geoscientist. These themes include giving students a good grounding in STEM, not just geology; one-on-one mentoring; sharing our passion for the science by sharing our research; and sharing the entire breadth of career opportunities. Similar best practices have been identified to encourage under-represented minority students and women to study STEM. Perhaps this is a suite of habits we should be practicing more broadly. This suite of habits takes extra time, extra effort, and extra money. But if geoscience mentors in Academia, Industry, and professional societies work together, we will be able to create a win for Academia, a win for Industry, and a win for students. (1) Gonzales and Keane, 2011, "Status of the Geoscience Workforce -- 2011," AGI, p. 123.

  1. Innovative Ideas in Introductory Economics. Volume 2. A Report Developed from the 1979-80 College and University Level Entries in the International Paper Company Foundation Awards Program for the Teaching of Economics.

    Science.gov (United States)

    Nappi, Andrew T., Ed.; Suglia, Anthony F., Ed.

    Award winning projects in K-12 and college level economics are described in this publication. There are two major sections. Section I describes winning projects for 1979-80. A senior research seminar in economics offered undergraduate students a chance to build inexpensive, simplified forecasting models of the U.S. economy. Each student develops…

  2. Teaching Win-Win Better Prepares Students for Subsequent Experiences in Life.

    Science.gov (United States)

    Brainard, Alan J.

    The psychology of competition and winning, especially in relation to learning and motivation, is discussed. The Personalized System of Instruction (PSI) approach to coursework is proposed as a means of using the winning philosophy in education. Also suggested is the inclusion into coursework design of a form of rhetoric developed by Carl Rogers…

  3. Challenging the win-win discourse on conservation and development: analyzing support for marine protected areas

    Directory of Open Access Journals (Sweden)

    Tomas Chaigneau

    2016-03-01

    Full Text Available Conservation designations such as protected areas are increasing in numbers around the world, yet it is widely reported that many are failing to reach their objectives. They are frequently promoted as opportunities for win-win outcomes that can both protect biodiversity and lead to economic benefits for affected communities. This win-win view characterizes the dominant discourse surrounding many protected areas. Although this discourse and the arguments derived from it may lead to initial acceptance of conservation interventions, this study shows how it does not necessarily result in compliance and positive attitudes toward specific protected areas. Consequently, the discourse has important implications not just for making the case for protected area implementation, but also for the likelihood of protected areas reaching their objectives. We explain how the win-win discourse influences support for marine protected areas (MPAs and, ultimately, their success. Using data from focus groups, questionnaires, and in-depth interviews at three MPA sites in the Philippines, we identified three reasons why the win-win discourse can negatively influence prolonged support for MPAs: dashed expectations, inequity, and temptation. Through an understanding of these issues, it becomes possible to suggest improvements that can be made pre-MPA implementation that can lead to prolonged support of MPAs. A focus on less tangible and economic MPA benefits, aligning MPA goals with cultural and social values, and higher levels of transparency when describing MPA outcomes are all ways in which prolonged support of MPAs can be bolstered.

  4. Lattice-Boltzmann simulations of droplet evaporation

    KAUST Repository

    Ledesma-Aguilar, Rodrigo

    2014-09-04

    © the Partner Organisations 2014. We study the utility and validity of lattice-Boltzmann (LB) simulations to explore droplet evaporation driven by a concentration gradient. Using a binary-fluid lattice-Boltzmann algorithm based on Cahn-Hilliard dynamics, we study the evaporation of planar films and 3D sessile droplets from smooth solid surfaces. Our results show that LB simulations accurately reproduce the classical regime of quasi-static dynamics. Beyond this limit, we show that the algorithm can be used to explore regimes where the evaporative and diffusive timescales are not widely separated, and to include the effect of boundaries of prescribed driving concentration. We illustrate the method by considering the evaporation of a droplet from a solid surface that is chemically patterned with hydrophilic and hydrophobic stripes. This journal is

  5. Nonequilibrium thermodynamics of restricted Boltzmann machines

    Science.gov (United States)

    Salazar, Domingos S. P.

    2017-08-01

    In this work, we analyze the nonequilibrium thermodynamics of a class of neural networks known as restricted Boltzmann machines (RBMs) in the context of unsupervised learning. We show how the network is described as a discrete Markov process and how the detailed balance condition and the Maxwell-Boltzmann equilibrium distribution are sufficient conditions for a complete thermodynamics description, including nonequilibrium fluctuation theorems. Numerical simulations in a fully trained RBM are performed and the heat exchange fluctuation theorem is verified with excellent agreement to the theory. We observe how the contrastive divergence functional, mostly used in unsupervised learning of RBMs, is closely related to nonequilibrium thermodynamic quantities. We also use the framework to interpret the estimation of the partition function of RBMs with the annealed importance sampling method from a thermodynamics standpoint. Finally, we argue that unsupervised learning of RBMs is equivalent to a work protocol in a system driven by the laws of thermodynamics in the absence of labeled data.

  6. Generalized Boltzmann equation for neutron stars

    Energy Technology Data Exchange (ETDEWEB)

    Kaniadakis, G. [Politecnico di Torino (Italy). Dipt. di Fisica]|[Istituto Nazionale di Fisica Nucleare, Sezione di Torino (Italy)]|[INFM, Torino (Italy); Lavagno, A. [Politecnico di Torino (Italy). Dipt. di Fisica]|[Istituto Nazionale di Fisica Nucleare, Sezione di Torino (Italy)]|[INFM, Torino (Italy); Quarati, P. [Politecnico di Torino (Italy). Dipt. di Fisica]|[Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari (Italy)]|[INFM, Torino (Italy)

    1997-08-04

    Baryon pairing and neutron superfluidity are believed to play an important role in the evolution of neutron stars. The pairing interaction provides a partial antisymmetrization of the nucleons in the stars with the evidence that fractional statistics must hold. By using a kinetic approach recently proposed [G. Kaniadakis, A. Lavagno and P. Quarati, Nucl. Phys. B 466 (1996) 527], we derive a non-linear Boltzmann equation which takes into account collective effects introduced by an exclusion-inclusion principle. This equation describes the dynamics of particles ruled by a fractional statistics. In addition, we extend this Boltzmann equation to the relativistic case and discuss the relevance of the quark matter in the star core. (orig.).

  7. Generalized Boltzmann Equation for Neutron Stars

    Science.gov (United States)

    Kaniadakis, G.; Lavagno, A.; Quarati, P.

    1997-02-01

    Baryon pairing and neutron superfluidity are believed to play an important role in the evolution of neutron stars. The pairing interaction provides a partial antisymmetrization of the nucleons in the stars with the evidence that fractional statistics must hold. By using a kinetic approach recently proposed [G. Kaniadakis, A. Lavagno and P. Quarati, Nucl. Phys. B 466 (1996) 527], we derive a non-linear boltzmann equation which takes into account collective effects introduced by an exclusion-inclusion principle. This equation describes the dynamics of particles ruled by a fractional statistics. In addition, we extend this Boltzmann equation to the relativistic case and discuss the relevance of the quark matter in the star core.

  8. Generalized Boltzmann formalism for oscillating neutrinos

    Science.gov (United States)

    Strack, P.; Burrows, A.

    2005-05-01

    In the standard approaches to neutrino transport in the simulation of core-collapse supernovas, one will often start from the classical Boltzmann equation for the neutrino’s spatial, temporal, and spectral evolution. For each neutrino species, and its antiparticle, the classical density in phase space, or the associated specific intensity, will be calculated as a function of time. The neutrino radiation is coupled to matter by source and sink terms on the “right-hand side” of the transport equation and together with the equations of hydrodynamics this set of coupled partial differential equations for classical densities describes, in principle, the evolution of core collapse and explosion. However, with the possibility of neutrino oscillations between species, a purely quantum-physical effect, how to generalize this set of Boltzmann equations for classical quantities to reflect oscillation physics has not been clear. To date, the formalisms developed have retained the character of quantum operator physics involving complex quantities and have not been suitable for easy incorporation into standard supernova codes. In this paper, we derive generalized Boltzmann equations for quasiclassical, real-valued phase-space densities that retain all the standard oscillation phenomenology, including the matter-enhanced resonant flavor conversion (Mikheev-Smirnov-Wolfenstein effect), neutrino self-interactions, and the interplay between decohering matter coupling and flavor oscillations. With this formalism, any code(s) that can now handle the solution of the classical Boltzmann or transport equation can easily be generalized to include neutrino oscillations in a quantum-physically consistent fashion.

  9. The quantum Boltzmann equation in semiconductor physics

    Energy Technology Data Exchange (ETDEWEB)

    Snoke, D.W. [Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA, 15260 (United States)

    2011-01-15

    The quantum Boltzmann equation, or Fokker-Planck equation, has been used to successfully explain a number of experiments in semiconductor optics in the past two decades. This paper reviews some of the developments of this work, including models of excitons in bulk materials, electron-hole plasmas, and polariton gases. (Copyright copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  10. The Boltzmann equation in the difference formulation

    Energy Technology Data Exchange (ETDEWEB)

    Szoke, Abraham [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Brooks III, Eugene D. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2015-05-06

    First we recall the assumptions that are needed for the validity of the Boltzmann equation and for the validity of the compressible Euler equations. We then present the difference formulation of these equations and make a connection with the time-honored Chapman - Enskog expansion. We discuss the hydrodynamic limit and calculate the thermal conductivity of a monatomic gas, using a simplified approximation for the collision term. Our formulation is more consistent and simpler than the traditional derivation.

  11. Two generalizations of the Boltzmann equation

    Energy Technology Data Exchange (ETDEWEB)

    Biro, T.S. [KFKI Research Institute for Particle and Nuclear Physics, Budapest (Hungary); Kaniadakis, G. [Instituto Nazionale di Fisica della Materia, Politecnico di Torino, Dipt. di Fisica, Torino (Italy)

    2006-03-15

    We connect two different extensions of Boltzmann's kinetic theory by requiring the same stationary solution. Non-extensive statistics can be produced by either using corresponding collision rates nonlinear in the one-particle densities or equivalently by using nontrivial energy composition rules in the energy conservation constraint part. Direct transformation formulas between key functions of the two approaches are given. (authors)

  12. On the full Boltzmann equations for leptogenesis

    Energy Technology Data Exchange (ETDEWEB)

    Garayoa, J.; Pastor, S.; Pinto, T.; Rius, N.; Vives, O., E-mail: garayoa@ific.uv.es, E-mail: pastor@ific.uv.es, E-mail: teguayco@gmail.com, E-mail: nuria@ific.uv.es, E-mail: vives@ific.uv.es [Depto. de Física Teórica and IFIC, Universidad de Valencia-CSIC, Edificio de Institutos de Paterna, Apt. 22085, 46071 Valencia (Spain)

    2009-09-01

    We consider the full Boltzmann equations for standard and soft leptogenesis, instead of the usual integrated Boltzmann equations which assume kinetic equilibrium for all species. Decays and inverse decays may be inefficient for thermalising the heavy-(s)neutrino distribution function, leading to significant deviations from kinetic equilibrium. We analyse the impact of using the full kinetic equations in the case of a previously generated lepton asymmetry, and find that the washout of this initial asymmetry due to the interactions of the right-handed neutrino is larger than when calculated via the integrated equations. We also solve the full Boltzmann equations for soft leptogenesis, where the lepton asymmetry induced by the soft SUSY-breaking terms in sneutrino decays is a purely thermal effect, since at T = 0 the asymmetry in leptons cancels the one in sleptons. In this case, we obtain that in the weak washout regime (K ∼< 1) the final lepton asymmetry can change up to a factor four with respect to previous estimates.

  13. Video lottery: winning expectancies and arousal.

    Science.gov (United States)

    Ladouceur, Robert; Sévigny, Serge; Blaszczynski, Alexander; O'Connor, Kieron; Lavoie, Marc E

    2003-06-01

    This study investigates the effects of video lottery players' expectancies of winning on physiological and subjective arousal. Participants were assigned randomly to one of two experimental conditions: high and low winning expectancies. Participants played 100 video lottery games in a laboratory setting while physiological measures were recorded. Level of risk-taking was controlled. Participants were 34 occasional or regular video lottery players. They were assigned randomly into two groups of 17, with nine men and eight women in each group. The low-expectancy group played for fun, therefore expecting to win worthless credits, while the high-expectancy group played for real money. Players' experience, demographic variables and subjective arousal were assessed. Severity of problem gambling was measured with the South Oaks Gambling Screen. In order to measure arousal, the average heart rate was recorded across eight periods. Participants exposed to high as compared to low expectations experienced faster heart rate prior to and during the gambling session. According to self-reports, it is the expectancy of winning money that is exciting, not playing the game. Regardless of the level of risk-taking, expectancy of winning is a cognitive factor influencing levels of arousal. When playing for fun, gambling becomes significantly less stimulating than when playing for money.

  14. IEEE prize awarded to CERN PhD student

    CERN Multimedia

    2006-01-01

    Rafael Ballabriga Suñe (right) receives the Student Paper Award. Rafael Ballabriga Suñe is the recipient of the 2006 Institute of Electrical and Electronics Engineers, Inc. (IEEE) Nuclear and Plasma Sciences Society (NPSS)'s Student Paper Award. Ballabriga's winning paper reported on a prototype chip, which belongs to a new generation of single photon counting hybrid pixel detector readout chips - Medipix3. The NPSS established this award in 2005 to encourage outstanding student contributions and greater student participation as principle or sole authors of papers. The prizes were presented at the IEEE Nuclear Science Symposium held in San Diego on 29 October to 4 November. The prototype chip was designed by Ballabriga based on ideas generated within the CERN Medipix team - part of the PH Microelectronics group. It could be used in various fields in the future, including medical imaging, neutron imaging, electron microscopy, radiation monitoring and other applications in high-energy physics. The novel aspe...

  15. Convergence of Convective-Diffusive Lattice Boltzmann Methods

    CERN Document Server

    Elton, B H; Levermore, C D; Elton, Bracy H.; Rodrigue, Garry H.

    1993-01-01

    Lattice Boltzmann methods are numerical schemes derived as a kinetic approximation of an underlying lattice gas. A numerical convergence theory for nonlinear convective-diffusive lattice Boltzmann methods is established. Convergence, consistency, and stability are defined through truncated Hilbert expansions. In this setting it is shown that consistency and stability imply convergence. Monotone lattice Boltzmann methods are defined and shown to be stable, hence convergent when consistent. Examples of diffusive and convective-diffusive lattice Boltzmann methods that are both consistent and monotone are presented.

  16. SigWinR; the SigWin-detector updated and ported to R

    Directory of Open Access Journals (Sweden)

    Breit Timo M

    2009-10-01

    Full Text Available Abstract Background Our SigWin-detector discovers significantly enriched windows of (genomic elements in any sequence of values (genes or other genomic elements in a DNA sequence in a fast and reproducible way. However, since it is grid based, only (life scientists with access to the grid can use this tool. Therefore and on request, we have developed the SigWinR package which makes the SigWin-detector available to a much wider audience. At the same time, we have introduced several improvements to its algorithm as well as its functionality, based on the feedback of SigWin-detector end users. Findings To allow usage of the SigWin-detector on a desktop computer, we have rewritten it as a package for R: SigWinR. R is a free and widely used multi platform software environment for statistical computing and graphics. The package can be installed and used on all platforms for which R is available. The improvements involve: a visualization of the input-sequence values supporting the interpretation of Ridgeograms; a visualization allowing for an easy interpretation of enriched or depleted regions in the sequence using windows of pre-defined size; an option that allows the analysis of circular sequences, which results in rectangular Ridgeograms; an application to identify regions of co-altered gene expression (ROCAGEs with a real-life biological use-case; adaptation of the algorithm to allow analysis of non-regularly sampled data using a constant window size in physical space without resampling the data. To achieve this, support for analysis of windows with an even number of elements was added. Conclusion By porting the SigWin-detector as an R package, SigWinR, improving its algorithm and functionality combined with adequate performance, we have made SigWin-detector more useful as well as more easily accessible to scientists without a grid infrastructure.

  17. BMC Ecology image competition: the winning images.

    Science.gov (United States)

    Harold, Simon; Wong, Yan; Baguette, Michel; Bonsall, Michael B; Clobert, Jean; Royle, Nick J; Settele, Josef

    2013-03-22

    BMC Ecology announces the winning entries in its inaugural Ecology Image Competition, open to anyone affiliated with a research institute. The competition, which received more than 200 entries from international researchers at all career levels and a wide variety of scientific disciplines, was looking for striking visual interpretations of ecological processes. In this Editorial, our academic Section Editors and guest judge Dr Yan Wong explain what they found most appealing about their chosen winning entries, and highlight a few of the outstanding images that didn't quite make it to the top prize.

  18. BMC Ecology image competition: the winning images

    Science.gov (United States)

    2013-01-01

    BMC Ecology announces the winning entries in its inaugural Ecology Image Competition, open to anyone affiliated with a research institute. The competition, which received more than 200 entries from international researchers at all career levels and a wide variety of scientific disciplines, was looking for striking visual interpretations of ecological processes. In this Editorial, our academic Section Editors and guest judge Dr Yan Wong explain what they found most appealing about their chosen winning entries, and highlight a few of the outstanding images that didn’t quite make it to the top prize. PMID:23517630

  19. Examining How Manufacturing Corporations Win Orders

    Directory of Open Access Journals (Sweden)

    Sang-Bing Tsai

    2013-11-01

    Full Text Available This study adopted 14 criteria for order-winners and qualifiers as the attributes for evaluation. The first stage used a simultaneous importance-performance analysis to analyse the competitive market situations of a corporation and its competitors. The second stage used the decision-making trial and evaluation laboratory method to analyse the attributes causal relationships and levels of influence; then two methods of analysis were integrated to analyse and re-formulate the competitive strategies for the winning orders. As well as serving as a novel theory-based method to examine how manufacturers win orders, the proposals in this study can be applied to practical industry experiences.

  20. Some Tractable Win-Lose Games

    OpenAIRE

    Datta, Samir; Krishnamurthy, Nagarajan

    2010-01-01

    Determining a Nash equilibrium in a $2$-player non-zero sum game is known to be PPAD-hard (Chen and Deng (2006), Chen, Deng and Teng (2009)). The problem, even when restricted to win-lose bimatrix games, remains PPAD-hard (Abbott, Kane and Valiant (2005)). However, there do exist polynomial time tractable classes of win-lose bimatrix games - such as, very sparse games (Codenotti, Leoncini and Resta (2006)) and planar games (Addario-Berry, Olver and Vetta (2007)). We extend the results in the ...

  1. How to win friends and influence people

    CERN Document Server

    Carnegie, Dale

    2010-01-01

    For more than sixty years the rock-solid, time-tested advice in this book has carried thousands of now famous people up the ladder of success in their business and personal lives. With more than fifteen million copies sold, How to Win Friends and Influence People is one of the best known motivational books in history, with proven advice for achieving success in life. You’ll learn: three fundamental techniques in handling people; six ways to make people like you; twelve ways to win people to you way of thinking; nine ways to change people without arousing resentment; and much, much more!

  2. Privacy-preserving restricted boltzmann machine.

    Science.gov (United States)

    Li, Yu; Zhang, Yuan; Ji, Yue

    2014-01-01

    With the arrival of the big data era, it is predicted that distributed data mining will lead to an information technology revolution. To motivate different institutes to collaborate with each other, the crucial issue is to eliminate their concerns regarding data privacy. In this paper, we propose a privacy-preserving method for training a restricted boltzmann machine (RBM). The RBM can be got without revealing their private data to each other when using our privacy-preserving method. We provide a correctness and efficiency analysis of our algorithms. The comparative experiment shows that the accuracy is very close to the original RBM model.

  3. Privacy-Preserving Restricted Boltzmann Machine

    Directory of Open Access Journals (Sweden)

    Yu Li

    2014-01-01

    Full Text Available With the arrival of the big data era, it is predicted that distributed data mining will lead to an information technology revolution. To motivate different institutes to collaborate with each other, the crucial issue is to eliminate their concerns regarding data privacy. In this paper, we propose a privacy-preserving method for training a restricted boltzmann machine (RBM. The RBM can be got without revealing their private data to each other when using our privacy-preserving method. We provide a correctness and efficiency analysis of our algorithms. The comparative experiment shows that the accuracy is very close to the original RBM model.

  4. Asymmetric Warfare and the Will to Win

    National Research Council Canada - National Science Library

    Herrera, Cary

    2001-01-01

    This thesis explores the will to win in asymmetric war. Asymmetric war, in which one side has an overwhelming advantage over its opponent, will likely be the war of the future for the United States in the post-Cold War uni-polar world...

  5. Comparing Natural Language Retrieval: WIN and FREESTYLE.

    Science.gov (United States)

    Pritchard-Schoch, Teresa

    1995-01-01

    Compares two natural language processing search engines, WIN (WESTLAW Is Natural) and FREESTYLE, developed by LEXIS. Legal issues in natural language queries were presented to identical libraries in both systems. Results showed that the editorials enhanced relevance; a search would be more thorough using both databases; and if only one system were…

  6. Labor Supply Effects of Winning a Lottery

    NARCIS (Netherlands)

    Picchio, Matteo; Suetens, Sigrid; van Ours, Jan

    2015-01-01

    This paper investigates how winning a substantial lottery prize affects labor supply. Analyzing data from Dutch State Lottery winners, we find that earnings are affected but not employment. Lottery prize winners reduce their hours of work but they are not very likely to withdraw from the labor

  7. Labor supply effects of winning a lottery

    NARCIS (Netherlands)

    Picchio, Matteo; Suetens, Sigrid; van Ours, Jan

    2017-01-01

    This paper investigates how winning a substantial lottery prize affects labor supply. Analyzing data from Dutch State Lottery winners, we find that earnings are affected but not employment. Lottery prize winners reduce their hours of work but they are not very likely to withdraw from the labor

  8. Make Win-Win a Reality: Delighting the Customer be Implementing Oracle HR - Integration Update to Fall 1997 Paper

    Science.gov (United States)

    Mills, J.; Shope, S.

    1998-01-01

    Implementing Oracle Human Resources Management System (HRMS) using a customer and integration approach provides the organization an enormous oppurtunity to create a win-win situation for customers, the HR department and the enterprise.

  9. A win-win strategy for ecological restoration and biodiversity conservation in Southern China

    Science.gov (United States)

    Cao, Shixiong; Shang, Di; Yue, Hui; Ma, Hua

    2017-04-01

    Environmental degradation and poverty are linked, and must be tackled together. Doing so requires a win-win strategy that both restores the environment and ensures a sustainable livelihood for those who are affected by the restoration project. To understand the importance of combining ecological restoration and biodiversity conservation objectives with a consideration of the livelihoods of residents, we examined a successful project in ecologically fragile Changting County, Fujian Province, China. We attribute the project’s success to the development of a win-win strategy that sustainably improved resident livelihoods, in contrast with traditional strategies that focus exclusively on establishing forests and grassland. To develop this win-win strategy, we performed long-term monitoring (since 1984) under a program designed to permit ecological restoration and biodiversity conservation in the county. For our analysis, we chose a range of natural and socioeconomic indicators that could affect the ecological restoration; we then used a contribution model to identify the relative influence of each social, economic, or environmental factor on the dependent variables (vegetation cover, soil erosion, number of plant species). The results showed that by improving livelihoods and mitigating poverty in the long term, the project also reduced damage to the environment by local residents. Our calculations suggest that accounting for socioeconomic factors played a key role in the successful ecological conservation. This win-win path to escaping the poverty trap during ecological restoration provides an example that can be followed by restoration projects elsewhere in the world with suitable modifications to account for unique local conditions.

  10. Winning or not winning: the influence on coach-athlete relationships and goal achievement

    OpenAIRE

    Troncado Mata, Rui; Gomes, Antonio Rui da Silva

    2013-01-01

    This study analyses the relation between sports success and athletes’ perception of coaches’ leadership, athletes’ satisfaction with coaches’ leadership, coach-athlete compatibility, and goal achievement. Sixty-six athletes who qualified for the final Division I play-offs of a professional volleyball championship were grouped into winning (n = 21) and non-winning teams (n = 45). Leadership styles, satisfaction with leadership, coach-athlete compatibility, and goal achievement were evaluated. ...

  11. Can a near win kindle motivation? The impact of nearly winning on motivation for unrelated rewards.

    Science.gov (United States)

    Wadhwa, Monica; Kim, JeeHye Christine

    2015-06-01

    Common intuition and research suggest that winning is more motivating than losing. However, we propose that just failing to obtain a reward (i.e., nearly winning it) in one task leads to broader, positive motivational effects on subsequent unrelated tasks relative to clearly losing or actually obtaining the reward. We manipulated a near-win experience using a game app in Experiments 1 through 3 and a lottery in Experiment 4. Our findings showed that nearly winning in one task subsequently led participants to walk faster to get to a chocolate bar (Experiment 1), salivate more for money (Experiment 2), and increase their effort to earn money in a card-sorting task (Experiment 3). A field study (Experiment 4) demonstrated that nearly winning led people to subsequently spend more money on desirable consumer products. Finally, our findings showed that when the activated motivational state was dampened in an intervening task, the nearly-winning effect was attenuated. © The Author(s) 2015.

  12. Boltzmann and Einstein: Statistics and dynamics–An unsolved ...

    Indian Academy of Sciences (India)

    The struggle of Boltzmann with the proper description of the behavior of classical macroscopic bodies in equilibrium in terms of the properties of the particles out of which they consist will be sketched. He used both a dynamical and a statistical method. However, Einstein strongly disagreed with Boltzmann's statistical method ...

  13. Boltzmann and Einstein: Statistics and dynamics – An unsolved ...

    Indian Academy of Sciences (India)

    Boltzmann and Einstein: Statistics and dynamics –. An unsolved problem. E G D COHEN. The Rockefeller University, 1230 York Avenue, New York, NY 10021, USA. E-mail: egdc@rockefeller.edu. Abstract. The struggle of Boltzmann with the proper description of the behavior of classical macroscopic bodies in equilibrium in ...

  14. Soluble Boltzmann equations for internal state and Maxwell models

    NARCIS (Netherlands)

    Futcher, E.; Hoare, M.R.; Hendriks, E.M.; Ernst, M.H.

    We consider a class of scalar nonlinear Boltzmann equations describing the evolution of a microcanonical ensemble in which sub-systems exchange internal energy ‘randomly’ in binary interactions. In the continuous variable version these models can equally be interpreted as Boltzmann equations for

  15. The Einstein-Boltzmann equations revisited

    Science.gov (United States)

    Nadkarni-Ghosh, Sharvari; Refregier, Alexandre

    2017-10-01

    The linear Einstein-Boltzmann (E-B) equations describe the evolution of perturbations in the universe and its numerical solutions play a central role in cosmology. We revisit this system of differential equations and present a detailed investigation of its mathematical properties. For this purpose, we focus on a simplified set of equations aimed at describing the broad features of the matter power spectrum. We first perform an eigenvalue analysis and study the onset of oscillations in the system signalled by the transition from real to complex eigenvalues. We then provide a stability criterion of different numerical schemes for this linear system and estimate the associated step size. We elucidate the stiffness property of the E-B system and show how it can be characterized in terms of the eigenvalues. While the parameters of the system are time dependent making it non-autonomous, we define an adiabatic regime where the parameters vary slowly enough for the system to be quasi-autonomous. We summarize the different regimes of the system for these different criteria as function of wavenumber k and scalefactor a. We also provide a compendium of analytic solutions for all perturbation variables in six limits on the k-a plane and express them explicitly in terms of initial conditions. These results are aimed to help the further development and testing of numerical cosmological Boltzmann solvers.

  16. Immersed boundary lattice Boltzmann model based on multiple relaxation times

    Science.gov (United States)

    Lu, Jianhua; Han, Haifeng; Shi, Baochang; Guo, Zhaoli

    2012-01-01

    As an alterative version of the lattice Boltzmann models, the multiple relaxation time (MRT) lattice Boltzmann model introduces much less numerical boundary slip than the single relaxation time (SRT) lattice Boltzmann model if some special relationship between the relaxation time parameters is chosen. On the other hand, most current versions of the immersed boundary lattice Boltzmann method, which was first introduced by Feng and improved by many other authors, suffer from numerical boundary slip as has been investigated by Le and Zhang. To reduce such a numerical boundary slip, an immerse boundary lattice Boltzmann model based on multiple relaxation times is proposed in this paper. A special formula is given between two relaxation time parameters in the model. A rigorous analysis and the numerical experiments carried out show that the numerical boundary slip reduces dramatically by using the present model compared to the single-relaxation-time-based model.

  17. Exploring cluster Monte Carlo updates with Boltzmann machines

    Science.gov (United States)

    Wang, Lei

    2017-11-01

    Boltzmann machines are physics informed generative models with broad applications in machine learning. They model the probability distribution of an input data set with latent variables and generate new samples accordingly. Applying the Boltzmann machines back to physics, they are ideal recommender systems to accelerate the Monte Carlo simulation of physical systems due to their flexibility and effectiveness. More intriguingly, we show that the generative sampling of the Boltzmann machines can even give different cluster Monte Carlo algorithms. The latent representation of the Boltzmann machines can be designed to mediate complex interactions and identify clusters of the physical system. We demonstrate these findings with concrete examples of the classical Ising model with and without four-spin plaquette interactions. In the future, automatic searches in the algorithm space parametrized by Boltzmann machines may discover more innovative Monte Carlo updates.

  18. Angelopoulos receives Scarf Award

    Science.gov (United States)

    Lee, Martin

    AGU's third annual F.L. Scarf Award has been awarded to Vassilis Angelopoulos for his Ph.D. thesis, “Transport Phenomena in the Earth's Plasma Sheet,” which he completed at the University of California, Los Angeles, under the supervision of Charles Kennel. As part of the award, Angelopoulos will give an invited talk on a related topic at the upcoming AGU Fall Meeting in San Francisco.The award was established to honor Fred L. Scarf, a pioneer and leader in solar-planetary research. The award is given by the Space Physics and Aeronomy (SPA) section for outstanding dissertation research that contributes directly to solar-planetary science. The major criterion for the award is the impact or potential impact of the research on the field of solar-planetary studies. The awardee receives $1000 and is invited to deliver a paper at one of the following year's AGU meetings.

  19. 2004 Small Business Award

    Science.gov (United States)

    Presidential Green Chemistry Challenge 2004 award winner, Jeneil Biosurfactant Company, makes biobased, rhamnolipid surfactants by fermentation that are less toxic and more biodegradable than conventional surfactants.

  20. Win-Win-Win: Reflections from a Work-Integrated Learning Project in a Non-Profit Organization

    Directory of Open Access Journals (Sweden)

    Dale C MacKrell

    2016-05-01

    Full Text Available This paper reports on the educational aspects of an information systems work-integrated learning (WIL capstone project for an organization which operates to alleviate homelessness in the Australian non-profit sector. The methodology adopted for the study is Action Design Research (ADR which draws on action research and design research as a means for framing a project's progress. Reflective insights by the project stakeholders, namely, students, academics, and the non-profit client, reveal a curriculum at work through internal features of the organization; personal features of the participants and features of the external environment. Preliminary findings suggest that students in a WIL project for a non-profit are highly engaged, especially when they become aware of the project’s social value. As well, the improvement of professional skills and emotional intelligence by students is more likely in real-life practice settings than in other less authentic WIL activities, equipping graduates for the workforce with both strong disciplinary and generic skills. Win-win-win synergies through project collaboration represent worthwhile outcomes to education, industry and research.

  1. Poisson-Boltzmann versus Size-Modified Poisson-Boltzmann Electrostatics Applied to Lipid Bilayers.

    Science.gov (United States)

    Wang, Nuo; Zhou, Shenggao; Kekenes-Huskey, Peter M; Li, Bo; McCammon, J Andrew

    2014-12-26

    Mean-field methods, such as the Poisson-Boltzmann equation (PBE), are often used to calculate the electrostatic properties of molecular systems. In the past two decades, an enhancement of the PBE, the size-modified Poisson-Boltzmann equation (SMPBE), has been reported. Here, the PBE and the SMPBE are reevaluated for realistic molecular systems, namely, lipid bilayers, under eight different sets of input parameters. The SMPBE appears to reproduce the molecular dynamics simulation results better than the PBE only under specific parameter sets, but in general, it performs no better than the Stern layer correction of the PBE. These results emphasize the need for careful discussions of the accuracy of mean-field calculations on realistic systems with respect to the choice of parameters and call for reconsideration of the cost-efficiency and the significance of the current SMPBE formulation.

  2. End Game Strategies: Winning the Peace

    Science.gov (United States)

    2012-03-01

    L. Peace Sr. TITLE: End Game Strategies: Winning the Peace FORMAT: Strategy Research Project DATE: 01 March 2012 WORD COUNT: 7,840 PAGES...have been to bring in members of the army and police forces with former Ba’athist ties and reeducate them while using strict discipline and...Studies Institute, U.S. Army War College, 3 March 2008), 14. 15 Dobbins, et.al., America’s role in nation-building, 7. 16 Harold Zink, American

  3. On the conditions of validity of the Boltzmann equation and Boltzmann H-theorem

    Science.gov (United States)

    Tessarotto, Massimo; Cremaschini, Claudio; Tessarotto, Marco

    2013-03-01

    In this paper the problem is posed of the formulation of the so-called ab initio approach to the statistical description of the Boltzmann-Sinai N -body classical dynamical system (CDS) formed by identical smooth hard spheres. This amounts to introducing a suitably generalized version of the axioms of Classical Statistical Mechanics. The latter involve a proper definition of the functional setting for the N -body probability density function (PDF), so that it includes also the case of the deterministic N -body PDF. In connection with this issue, a further development concerns the introduction of modified collision boundary conditions which differ from the usual ones adopted in previous literature. Both features are proved to be consistent with the validity of exact H-theorems for the N -body and 1 -body PDFs, respectively. Consequences of the axiomatic approach which concern the conditions of validity of the Boltzmann kinetic equation and the Boltzmann H-theorem are investigated. In particular, the role of the modified boundary conditions is discussed. It is shown that both theorems fail in the case in which the N -body PDF is identified with the deterministic PDF. Finally, the issue of applicability of the Zermelo and Loschmidt paradoxes to the ab initio approach presented here is discussed.

  4. Boltzmann equation with double-well potentials

    Science.gov (United States)

    Chiacchiera, Silvia; Macrı, Tommaso; Trombettoni, Andrea

    2016-10-01

    We study the dynamics of an interacting classical gas trapped in a double-well potential at finite temperature. Two model potentials are considered: a cubic box with a square barrier in the middle, and a harmonic trap with a Gaussian barrier along one direction. The study is performed using the Boltzmann equation, solved numerically via the test-particle method. We introduce and discuss a simple analytical model that allows one to provide estimates of the relaxation time, which are compared with numerical results. Finally, we use our findings to make numerical and analytical predictions for the case of a fermionic mixture in the normal-fluid phase in a realistic double-well potential relevant for experiments with cold atoms.

  5. Boltzmann babies in the proper time measure

    Energy Technology Data Exchange (ETDEWEB)

    Bousso, Raphael; Bousso, Raphael; Freivogel, Ben; Yang, I-Sheng

    2007-12-20

    After commenting briefly on the role of the typicality assumption in science, we advocate a phenomenological approach to the cosmological measure problem. Like any other theory, a measure should be simple, general, well defined, and consistent with observation. This allows us to proceed by elimination. As an example, we consider the proper time cutoff on a geodesic congruence. It predicts that typical observers are quantum fluctuations in the early universe, or Boltzmann babies. We sharpen this well-known youngness problem by taking into account the expansion and open spatial geometry of pocket universes. Moreover, we relate the youngness problem directly to the probability distribution for observables, such as the temperature of the cosmic background radiation. We consider a number of modifications of the proper time measure, but find none that would make it compatible with observation.

  6. Adaptive filtering for the lattice Boltzmann method

    Science.gov (United States)

    Marié, Simon; Gloerfelt, Xavier

    2017-03-01

    In this study, a new selective filtering technique is proposed for the Lattice Boltzmann Method. This technique is based on an adaptive implementation of the selective filter coefficient σ. The proposed model makes the latter coefficient dependent on the shear stress in order to restrict the use of the spatial filtering technique in sheared stress region where numerical instabilities may occur. Different parameters are tested on 2D test-cases sensitive to numerical stability and on a 3D decaying Taylor-Green vortex. The results are compared to the classical static filtering technique and to the use of a standard subgrid-scale model and give significant improvements in particular for low-order filter consistent with the LBM stencil.

  7. A Boltzmann Equation for the QCD Plasma

    CERN Document Server

    Blaizot, Jean-Paul; Blaizot, Jean-Paul; Iancu, Edmond

    1999-01-01

    We present a derivation of a Boltzmann equation for the QCD plasma, starting from the quantum field equations. The derivation is based on a gauge covariant gradient expansion which takes consistently into account all possible dependences on the gauge coupling assumed to be small. We point out a limitation of the gradient expansion arising when the range of the interactions becomes comparable with that of the space-time inhomogeneities of the system. The method is first applied to the case of scalar electrodynamics, and then to the description of long wavelength colour fluctuations in the QCD plasma, where our equation coincides with that recently proposed by Arnold, Son and Yaffe. We discuss interesting cancellations among various collision terms, which occur in the calculation of most transport coefficients, but not in that of the quasiparticle lifetime, or in that of the relaxation time of colour excitations.

  8. The Lattice Boltzmann method principles and practice

    CERN Document Server

    Krüger, Timm; Kuzmin, Alexandr; Shardt, Orest; Silva, Goncalo; Viggen, Erlend Magnus

    2017-01-01

    This book is an introduction to the theory, practice, and implementation of the Lattice Boltzmann (LB) method, a powerful computational fluid dynamics method that is steadily gaining attention due to its simplicity, scalability, extensibility, and simple handling of complex geometries. The book contains chapters on the method's background, fundamental theory, advanced extensions, and implementation. To aid beginners, the most essential paragraphs in each chapter are highlighted, and the introductory chapters on various LB topics are front-loaded with special "in a nutshell" sections that condense the chapter's most important practical results. Together, these sections can be used to quickly get up and running with the method. Exercises are integrated throughout the text, and frequently asked questions about the method are dealt with in a special section at the beginning. In the book itself and through its web page, readers can find example codes showing how the LB method can be implemented efficiently on a va...

  9. Lattice Boltzmann model for numerical relativity.

    Science.gov (United States)

    Ilseven, E; Mendoza, M

    2016-02-01

    In the Z4 formulation, Einstein equations are written as a set of flux conservative first-order hyperbolic equations that resemble fluid dynamics equations. Based on this formulation, we construct a lattice Boltzmann model for numerical relativity and validate it with well-established tests, also known as "apples with apples." Furthermore, we find that by increasing the relaxation time, we gain stability at the cost of losing accuracy, and by decreasing the lattice spacings while keeping a constant numerical diffusivity, the accuracy and stability of our simulations improve. Finally, in order to show the potential of our approach, a linear scaling law for parallelization with respect to number of CPU cores is demonstrated. Our model represents the first step in using lattice kinetic theory to solve gravitational problems.

  10. Creativity Awards: Great Expectations?

    Science.gov (United States)

    Kilgour, Mark; Sasser, Sheila; Koslow, Scott

    2013-01-01

    Given the creativity inherent in advertising, one useful measure of creativity may be the advertising creativity award. Although creativity awards have been used by academics, agencies, and clients as indicators of exemplary creative work, there is surprisingly little research as to what creative elements they actually represent. Senior agency…

  11. IDRC Doctoral Research Awards

    International Development Research Centre (IDRC) Digital Library (Canada)

    test

    Example of the letter required by IDRC: Reference: IDRC Awards competition: John Smith (Please indicate the title of the award.) a) As research supervisor of Mr. John Smith, I confirm that I approve and support the research proposal submitted by the candidate. b) Mr. Smith has successfully completed the following course(s):.

  12. Pension Fund award

    CERN Multimedia

    Antonella Del Rosso

    2013-01-01

    The CERN Pension Fund won the Investments & Pensions Europe (IPE) 2013 Gold Award in the Medium Real-Estate Investor category. IPE is the leading European publication on the subject of pensions. The awards were judged by a panel of 22 members, which included leading European investment consultants and pension fund executives.     Théodore Economou (left), the CERN Pension Fund’s Chief Executive Officer, receives the IPE 2013 Gold Award.   The award recognised the “fresh thinking” behind the CERN Pension Fund’s updated real-estate strategy, which has brought it “focus” on “high-quality assets and diversification.” The jury also noted the Fund’s “streamlined and cost-efficient” management, and noted that CERN is “running a tight ship”. While the awards are given by a European institution, they have a worldwide scope, and winners in ot...

  13. Awards aplenty in Krakow

    CERN Multimedia

    2009-01-01

    CERN will be well represented this year at the award ceremony organized by the European Physical Society (EPS) in Krakow. The Gargamelle Collaboration is being awarded the High Energy and Particle Physics prize, while Maurizio Pierini shares the Young Physicist Prize. Both Mick Storr and Andrzej Siemko will be awarded the Medal of the Polish Commission of National Education.This year’s EPS-High Energy and Particle Physics Prize is being awarded to the Gargamelle Collaboration for the discovery of the weak neutral current. Gargamelle’s large bubble chamber is now displayed in the Microcosm garden at CERN in commemoration of the discovery that led to the acceptance of the electroweak theory and the award of the Noble prize to Glashow, Salam and Weinberg in 1979. On 3 September 1973 the collaboration published two papers in the same issue of Physics Letters, one on neutral currents involving electrons, the other on neutral current interactions with hadrons (protons and neut...

  14. Analysis of spectral methods for the homogeneous Boltzmann equation

    KAUST Repository

    Filbet, Francis

    2011-04-01

    The development of accurate and fast algorithms for the Boltzmann collision integral and their analysis represent a challenging problem in scientific computing and numerical analysis. Recently, several works were devoted to the derivation of spectrally accurate schemes for the Boltzmann equation, but very few of them were concerned with the stability analysis of the method. In particular there was no result of stability except when the method was modified in order to enforce the positivity preservation, which destroys the spectral accuracy. In this paper we propose a new method to study the stability of homogeneous Boltzmann equations perturbed by smoothed balanced operators which do not preserve positivity of the distribution. This method takes advantage of the "spreading" property of the collision, together with estimates on regularity and entropy production. As an application we prove stability and convergence of spectral methods for the Boltzmann equation, when the discretization parameter is large enough (with explicit bound). © 2010 American Mathematical Society.

  15. Computational Aeroacoustics Using the Generalized Lattice Boltzmann Equation Project

    Data.gov (United States)

    National Aeronautics and Space Administration — The overall objective of the proposed project is to develop a generalized lattice Boltzmann (GLB) approach as a potential computational aeroacoustics (CAA) tool for...

  16. Testing the Maxwell-Boltzmann distribution using Brownian particles

    National Research Council Canada - National Science Library

    Mo, Jianyong; Simha, Akarsh; Kheifets, Simon; Raizen, Mark G

    2015-01-01

    .... We provide a direct verification of a modified Maxwell-Boltzmann velocity distribution and modified energy equipartition theorem that account for the kinetic energy of the liquid displaced by the particle...

  17. Lattice Boltzmann method fundamentals and engineering applications with computer codes

    CERN Document Server

    Mohamad, A A

    2014-01-01

    Introducing the Lattice Boltzmann Method in a readable manner, this book provides detailed examples with complete computer codes. It avoids the most complicated mathematics and physics without scarifying the basic fundamentals of the method.

  18. Reinforcement Learning via Boltzmann Machines Implemented on Quantum Annealers

    Science.gov (United States)

    Levit, A.; Crawford, D.; Ronagh, P.; Oberoi, J.; Ghadermarzy, N.

    2016-12-01

    Recent studies have suggested promising application of quantum annealing devices as Boltzmann distribution samplers. We exploit this idea to develop a reinforcement learning framework using Boltzmann machines implemented on quantum annealing systems. We apply our method to find optimal policies in Markov decision processes. The evolution of the reinforcement learning algorithms relies on training a Neural Network. We use Quantum Monte-Carlo simulation of an associated network of qubits to provide experimental evidence of suitability of our approach.

  19. Multiple-Relaxation-Time Lattice Boltzmann Models in 3D

    Science.gov (United States)

    dHumieres, Dominique; Ginzburg, Irina; Krafczyk, Manfred; Lallemand, Pierre; Luo, Li-Shi; Bushnell, Dennis M. (Technical Monitor)

    2002-01-01

    This article provides a concise exposition of the multiple-relaxation-time lattice Boltzmann equation, with examples of fifteen-velocity and nineteen-velocity models in three dimensions. Simulation of a diagonally lid-driven cavity flow in three dimensions at Re=500 and 2000 is performed. The results clearly demonstrate the superior numerical stability of the multiple-relaxation-time lattice Boltzmann equation over the popular lattice Bhatnagar-Gross-Krook equation.

  20. Hot electrons in superlattices: quantum transport versus Boltzmann equation

    DEFF Research Database (Denmark)

    Wacker, Andreas; Jauho, Antti-Pekka; Rott, S.

    1999-01-01

    A self-consistent solution of the transport equation is presented for semiconductor superlattices within different approaches: (i) a full quantum transport model based on nonequilibrium Green functions, (ii) the semiclassical Boltzmann equation for electrons in a miniband, and (iii) Boltzmann...... equation for electrons in Wannier-Stark states. We find good quantitative agreement of the approximations (ii) and (iii) with (i) in their respective ranges of validity. (C) 1999 Elsevier Science B.V. All rights reserved....

  1. [Welding arc temperature field measurements based on Boltzmann spectrometry].

    Science.gov (United States)

    Si, Hong; Hua, Xue-Ming; Zhang, Wang; Li, Fang; Xiao, Xiao

    2012-09-01

    Arc plasma, as non-uniform plasma, has complicated energy and mass transport processes in its internal, so plasma temperature measurement is of great significance. Compared with absolute spectral line intensity method and standard temperature method, Boltzmann plot measuring is more accurate and convenient. Based on the Boltzmann theory, the present paper calculates the temperature distribution of the plasma and analyzes the principle of lines selection by real time scanning the space of the TIG are measurements.

  2. The Lennart Nilsson Award.

    Science.gov (United States)

    Peres, M

    2001-01-01

    This article takes a brief look at the photography of Lennart Nilsson as well as the history of, and the formation of a foundation to raise monies for the establishment of an award in his name. Subsequently, a board and an international nominating committee evolved to select individuals to receive the award. Honorees are chosen based on the merits of their efforts in scientific imagery that, like the photography of Nilsson, reveal the unseen in the natural world. Finally, this article discusses the work of the latest two recipients of the award and invites readers to participate in the nomination process.

  3. KOMPUTASI DISTRIBUSI NEUTRON DALAM STATISTIK MAXWELL BOLTZMANN

    Directory of Open Access Journals (Sweden)

    Tuti Purwoningsih

    2013-03-01

    Full Text Available The migration of neutron is arranged by some probability distributions such as probability of spread distribution, probability of distance distribution, probability of energy distribution and probability of flux distribution. One application of these pattern distributions is modelling the reaction between neutron and elements which compose the tissue related to the absorption of neutron in brain cancer tissues. This article explores computation analysis of pattern of distribution of neutron flux in a reactor system. Variables were the amount of neutron simulated and the depth of cylindrical reactor system. Simulations showed that 20-120 minutes was needed in executing 100,000 neutrons to build the distribution pattern of neutrons flux. This pattern was also depended on the depth of the system. In all depths, the peak of neutron flux distribution pattern was in the 3rd bin. Comparison between this simulations and experiment results in literatures showed that by analyzing the simulation of the distribution of neutron flux, a Poisson distribution which follows the Maxwell-Boltzmann was resulted. Perpindahan neutron diatur dengan beberapa peluang distribusi, seperti peluang distribusi sudut hamburan, peluang distribusi jarak perpindahan, peluang distribusi energi transfer, serta peluang distribusi fluks neutron. Salah satu aplikasi dari pola distribusi ini adalah pemodelan reaksi antara neutron dengan elemen-elemen penyusun jaringan yang terkait dengan serapan neutron dan dosis yang terserap oleh jaringan tumor otak pada terapi BNCT (Boron Neutron Capture Therapy. Dalam penelitian ini dibahas analisis komputasi tentang pola distribusi fluks neutron dalam suatu sistem reaktor. Variabel dalam penelitian ini adalah banyaknya neutron yang disimulasikan, serta kedalaman sistem reaktor yang dalam penelitian ini menggunakan sistem reaktor berbentuk silinder. Hasil simulasi menunjukkan bahwa dengan neutron sebanyak 100.000 diperlukan waktu eksekusi sekitar

  4. Is Poisson-Boltzmann theory insufficient for protein folding simulations?

    Science.gov (United States)

    Lwin, Thu Zar; Zhou, Ruhong; Luo, Ray

    2006-01-21

    The Poisson-Boltzmann theory has been widely used in the studies of energetics and conformations of biological macromolecules. Recently, introduction of the efficient generalized Born approximation has greatly extended its applicability to areas such as protein folding simulations where highly efficient computation is crucial. However, limitations have been found in the folding simulations of a well-studied beta hairpin with several generalized Born implementations and different force fields. These studies have raised the question whether the underlining Poisson-Boltzmann theory, on which the generalized Born model is calibrated, is adequate in the treatment of polar interactions for the challenging protein folding simulations. To address the question whether the Poisson-Boltzmann theory in the current formalism might be insufficient, we directly tested our efficient numerical Poisson-Boltzmann implementation in the beta-hairpin folding simulation. Good agreement between simulation and experiment was found for the beta-hairpin equilibrium structures when the numerical Poisson-Boltzmann solvent and a recently improved generalized Born solvent were used. In addition simulated thermodynamic properties also agree well with experiment in both solvents. Finally, an overall agreement on the beta-hairpin folding mechanism was found between the current and previous studies. Thus, our simulations indicate that previously observed limitations are most likely due to imperfect calibration in previous generalized Born models but not due to the limitation of the Poisson-Boltzmann theory.

  5. FY11 Coc Awards

    Data.gov (United States)

    Department of Housing and Urban Development — This report displays the renewal homeless assistance projects being awarded by HUD under the 2011 Continuum of Care (CoC) competitive grants process. Approximately...

  6. Great Indoors Awards 2007

    Index Scriptorium Estoniae

    2007-01-01

    Hollandis Maastrichtis jagati 17. XI esimest korda rahvusvahelist auhinda The Great Indoors Award. Aasta sisekujundusfirmaks valiti Masamichi Katayama asutatud Wonderwall. Auhinna said veel Zaha Hadid, Heatherwick Studio, Ryui Nakamura Architects ja Item Idem

  7. CPD Allocations and Awards

    Data.gov (United States)

    Department of Housing and Urban Development — The CPD Allocation and Award database provides filterable on-screen and exportable reports on select programs, such as the Community Development Block Grant Program,...

  8. Extended lattice Boltzmann scheme for droplet combustion.

    Science.gov (United States)

    Ashna, Mostafa; Rahimian, Mohammad Hassan; Fakhari, Abbas

    2017-05-01

    The available lattice Boltzmann (LB) models for combustion or phase change are focused on either single-phase flow combustion or two-phase flow with evaporation assuming a constant density for both liquid and gas phases. To pave the way towards simulation of spray combustion, we propose a two-phase LB method for modeling combustion of liquid fuel droplets. We develop an LB scheme to model phase change and combustion by taking into account the density variation in the gas phase and accounting for the chemical reaction based on the Cahn-Hilliard free-energy approach. Evaporation of liquid fuel is modeled by adding a source term, which is due to the divergence of the velocity field being nontrivial, in the continuity equation. The low-Mach-number approximation in the governing Navier-Stokes and energy equations is used to incorporate source terms due to heat release from chemical reactions, density variation, and nonluminous radiative heat loss. Additionally, the conservation equation for chemical species is formulated by including a source term due to chemical reaction. To validate the model, we consider the combustion of n-heptane and n-butanol droplets in stagnant air using overall single-step reactions. The diameter history and flame standoff ratio obtained from the proposed LB method are found to be in good agreement with available numerical and experimental data. The present LB scheme is believed to be a promising approach for modeling spray combustion.

  9. Lattice Boltzmann algorithm for continuum multicomponent flow

    Science.gov (United States)

    Halliday, I.; Hollis, A. P.; Care, C. M.

    2007-08-01

    We present a multicomponent lattice Boltzmann simulation for continuum fluid mechanics, paying particular attention to the component segregation part of the underlying algorithm. In the principal result of this paper, the dynamics of a component index, or phase field, is obtained for a segregation method after U. D’Ortona [Phys. Rev. E 51, 3718 (1995)], due to Latva-Kokko and Rothman [Phys. Rev. E 71 056702 (2005)]. The said dynamics accord with a simulation designed to address multicomponent flow in the continuum approximation and underwrite improved simulation performance in two main ways: (i) by reducing the interfacial microcurrent activity considerably and (ii) by facilitating simulational access to regimes of flow with a low capillary number and drop Reynolds number [I. Halliday, R. Law, C. M. Care, and A. Hollis, Phys. Rev. E 73, 056708 (2006)]. The component segregation method studied, used in conjunction with Lishchuk’s method [S. V. Lishchuk, C. M. Care, and I. Halliday, Phys. Rev. E 67, 036701 (2003)], produces an interface, which is distributed in terms of its component index; however, the hydrodynamic boundary conditions which emerge are shown to support the notion of a sharp, unstructured, continuum interface.

  10. Accurate lineshape spectroscopy and the Boltzmann constant.

    Science.gov (United States)

    Truong, G-W; Anstie, J D; May, E F; Stace, T M; Luiten, A N

    2015-10-14

    Spectroscopy has an illustrious history delivering serendipitous discoveries and providing a stringent testbed for new physical predictions, including applications from trace materials detection, to understanding the atmospheres of stars and planets, and even constraining cosmological models. Reaching fundamental-noise limits permits optimal extraction of spectroscopic information from an absorption measurement. Here, we demonstrate a quantum-limited spectrometer that delivers high-precision measurements of the absorption lineshape. These measurements yield a very accurate measurement of the excited-state (6P1/2) hyperfine splitting in Cs, and reveals a breakdown in the well-known Voigt spectral profile. We develop a theoretical model that accounts for this breakdown, explaining the observations to within the shot-noise limit. Our model enables us to infer the thermal velocity dispersion of the Cs vapour with an uncertainty of 35 p.p.m. within an hour. This allows us to determine a value for Boltzmann's constant with a precision of 6 p.p.m., and an uncertainty of 71 p.p.m.

  11. Three Cancer Researchers Win CZ Biohub Prizes.

    Science.gov (United States)

    2017-06-01

    Three cancer researchers are among the first of 47 investigators to receive 5 years of funding through the Chan Zuckerberg Biohub. The financial awards, granted to scientists at the Biohub's three member institutions, will support early stage, high-risk foundational work at the intersection of biology and engineering. ©2017 American Association for Cancer Research.

  12. MIT professor wins major international math prize

    CERN Multimedia

    Allen, S

    2004-01-01

    Mathematicians Isadore Singer of MIT and Sir Michael Francis Atiyah of the University of Edinburgh will share an $875,000 award as winners of the second Abel Prize, which some hope will come to be seen as a Nobel Prize for math.

  13. Awarding a Prize

    DEFF Research Database (Denmark)

    Moeran, Brian

    2013-01-01

    This article describes and analyses the selection and prize awarding processes for a biennial ceramics exhibition in Japan. Based on long-term fieldwork in the “art world” (Becker 1982) of contemporary Japanese ceramics, as well as on participant observation of the processes concerned, the article...... addresses and draws upon two sets of sociological writings: one concerned with prizes and awards; the other with evaluative practices....

  14. European Physical Society awards

    CERN Multimedia

    2004-01-01

    The winners of the 2004 Accelerator Prizes, awarded by the European Physical Society's Interdivisional Group on Accelerators (EPS-IGA), have been announced. Vladmir Shiltsev (Fermilab) and Igor Meshkov (JINR, Joint Institute of Nuclear Research, Dubna) will be presented with their awards during the 9th European Particle Accelerator Conference, EPAC'04, on 8 July 2004 in Lucerne. Both physicists will also give a talk about their work. More details on: http://epac.web.cern.ch/

  15. Does Blue Uniform Color Enhance Winning Probability in Judo Contests?

    Directory of Open Access Journals (Sweden)

    Peter D. Dijkstra

    2018-01-01

    Full Text Available The color of an athlete's uniform may have an effect on psychological functioning and consequently bias the chances of winning contests in sport competition. Several studies reported a winning bias for judo athletes wearing a blue outfit relative to those wearing a white outfit. However, we argue there is no winning bias and that previous studies were confounded and based on small and specific data sets. We tested whether blue biases winning in judo using a very extensive judo data set (45,874 contests from all international judo tournaments between 2008 and 2014. In judo, the first called athlete for the fight used to wear the blue judogi but this was changed to the white judogi in 2011. This switch enabled us to compare the win bias before and after this change to isolate the effect of the color of the judogi. We found a significant win bias for the first called athlete, but this effect was not significantly related to the color of the judogi. The lack of a significant win effect of judogi color suggests that blue does not bias winning in judo, and that the blue-white pairing ensures an equal level of play. Our study shows the importance of thoroughly considering alternative explanations and using extensive datasets in color research in sports and psychology.

  16. Does Blue Uniform Color Enhance Winning Probability in Judo Contests?

    NARCIS (Netherlands)

    Dijkstra, P.D.; Preenen, P.T.Y.; Essen, H. van

    2018-01-01

    The color of an athlete's uniform may have an effect on psychological functioning and consequently bias the chances of winning contests in sport competition. Several studies reported a winning bias for judo athletes wearing a blue outfit relative to those wearing a white outfit. However, we argue

  17. A winning strategy for 3 x n Cylindrical Hex

    DEFF Research Database (Denmark)

    Huneke, S. C.; Hayward, R.; Toft, Bjarne

    2014-01-01

    For Cylindrical Hex on a board with circumference 3, we give a winning strategy for the end-to-end player. This is the first known winning strategy for odd circumference at least 3, answering a question of David Gale. (C) 2014 Elsevier B.V. All rights reserved....

  18. No effect of blue on winning contests in judo

    NARCIS (Netherlands)

    Dijkstra, Peter D.; Preenen, Paul T. Y.

    2008-01-01

    A study by Rowe et al. reported a winning bias for judo athletes wearing a blue outfit relative to those wearing a white one during the 2004 Olympics. It was suggested that blue is associated with a higher likelihood of winning through differential effects of colour on opponent visibility and/or an

  19. Future aircraft cabins and design thinking: optimisation vs. win-win scenarios

    Directory of Open Access Journals (Sweden)

    A. Hall

    2013-06-01

    Full Text Available With projections indicating an increase in mobility over the next few decades and annual flight departures expected to rise to over 16 billion by 2050, there is a demand for the aviation industry and associated stakeholders to consider new forms of aircraft and technology. Customer requirements are recognized as a key driver in business. The airline is the principal customer for the aircraft manufacture. The passenger is, in turn, the airline's principal customer but they are just one of several stakeholders that include aviation authorities, airport operators, air-traffic control and security agencies. The passenger experience is a key differentiator used by airlines to attract and retain custom and the fuselage that defines the cabin envelope for the in-flight passenger experience and cabin design therefore receives significant attention for new aircraft, service updates and refurbishments. Decision making in design is crucial to arriving at viable and worthwhile cabin formats. Too little innovation will result in an aircraft manufacturer and airlines using its products falling behind its competitors. Too much may result in an over-extension with, for example, use of immature technologies that do not have the necessary reliability for a safety critical industry or sufficient value to justify the development effort. The multiple requirements associated with cabin design, can be viewed as an area for optimisation, accepting trade-offs between the various parameters. Good design, however, is often defined as developing a concept that resolves the contradictions and takes the solution towards a win-win scenario. Indeed our understanding and practice of design allows for behaviors that enhance design thinking through divergence and convergence, the use of abductive reasoning, experimentation and systems thinking. This paper explores and defines the challenges of designing the aircraft cabin of the future that will deliver on the multiple

  20. Top Convention Paper Productivity in the U.S.: Analysis of National Communication Association (NCA) and International Communication Association (ICA) Awards 1994-1998.

    Science.gov (United States)

    Musambira, George W.

    2000-01-01

    Investigates the productivity of communication programs by ranking doctoral institutions (1) globally, based on top award winning National Communication Association and International Communication Association conference papers, and (2) according to selected specialties in communication studies. Argues that these results can be used in conjunction…

  1. Professional Development: Learning from the Best. A Toolkit for Schools and Districts Based on the National Awards Program for Model Professional Development.

    Science.gov (United States)

    Hassel, Emily

    This publication provides a step-by-step guide to help schools and districts implement strong, sustainable professional development that drives achievement of student learning goals. The toolkit is based on the experiences of national professional development award winning schools and districts. The most common thread among the winners is that…

  2. Group Creativity Training for Children: Lessons Learned from Two Award-Winning Teams

    Science.gov (United States)

    Shin, Namin; Jang, Yeon-Ju

    2017-01-01

    The development of group creativity can be challenging for both young students and their teachers. This study examined the processes and learning outcomes of group creativity training from the perspectives of elementary school students and teachers while identifying critical factors that contributed to the success of the training. Data were…

  3. Already on the Shelf: Queer Readings of Award-Winning Children's Literature

    Science.gov (United States)

    Ryan, Caitlin L.; Hermann-Wilmarth, Jill M.

    2013-01-01

    This essay explores what it might mean to read children's literature in elementary school classrooms through a queer lens. The authors argue that because queer theory has a history as a literary theory that destabilizes normative associations among gender, sexuality, bodies, and desire, it provides a set of analytical tools classroom communities…

  4. 40 CFR 105.5 - Who is eligible to win an award?

    Science.gov (United States)

    2010-07-01

    ...? A municipality, city, town, borough, county, parish, district, association, government agency, or... by or pursuant to State law; a company, corporation, association, partnership, firm, university, not... government wastewater treatment facility, or U.S. military command to the extent such government and other...

  5. Good to Great: Do Award Winning Schools Meet Successful School Criteria?

    Science.gov (United States)

    Searcey, Chad J.; Snodgrass, Jason T.; Copple, William Bryan, II

    2010-01-01

    Since the inception of the No Child Left Behind Act, school accountability has increased dramatically. The federal government has taken a much more active role in public education than it did prior to NCLB becoming law. Schools across the United States are working diligently to meet increased accountability standards. As schools and districts meet…

  6. Award-winning abstracts from the first Paediatric and Child Health ...

    African Journals Online (AJOL)

    2017-09-22

    Sep 22, 2017 ... intracranial hypertension. Although children with increased brain volume due to CM are at increased risk of death, the majority recover quickly and completely, suggesting that the adverse effects of the condition on respiratory status are reversible and short-lived hence this clinical trial. Objectives. (Primary) ...

  7. Leader to Leader: Enduring Insights on Leadership from the Drucker Foundation's Award-Winning Journal.

    Science.gov (United States)

    Hesselbein, Frances, Ed.; Cohen, Paul M., Ed.

    Amid unprecedented social, demographic, and economic changes, leaders must enhance performance and deliver desired results. The growing importance of managing the explosion in information requires attention to defining organizational missions and visions. The 37 chapters in this work are divided into 7 parts. Part 1, "On Leaders and…

  8. “Planet Earth” wins Emmy

    Science.gov (United States)

    “Planet Earth,” the seven-part public television series that explores the strides made in the earth sciences since the International Geophysical Year (IGY) in 1957-1958, won a 1986 Emmy award last month from the Academy of Television Arts and Sciences in the category of Outstanding Informational Series. The series was produced by WQED/Pittsburgh in association with the National Academy of Sciences.

  9. 3 Columbia U. students win Goldwater Fellowship

    CERN Multimedia

    Zaragovia, V

    2003-01-01

    "Noah Burns, Kiril Datchev, and Lawrence David, are the University of Columbia's three recipients of the Barry M. Goldwater Scholarship. This is an award of $7,500 given annually to cover expenses such as tuition, fees, books and room and board, to about 300 individuals nationwide. The scholarship aims to encourage outstanding students to pursue careers in mathematics, the natural sciences or engineering" (1 page).

  10. Successful scientist: What's the winning formula?

    Science.gov (United States)

    Stull, April J; Ciappio, Eric D

    2014-11-01

    What does it take to become a successful scientist? This question is usually asked or thought about at some point in a young scientist's career. The early stages of a scientific career are fraught with many hardships, and achieving success can seem impossible and daunting. After encountering many obstacles, it becomes easy to focus on failures and lose sight of career goals. The journey to success can seem so simple when looked upon from the outside, but even the best scientists have endured many hardships, which are often not communicated. This educational symposium featured a diverse panel of 5 accomplished scientists representing different work environments, such as government, industry, and academia. They discussed tips on how to have a successful career journey and the key qualities of a successful scientist. Also, they revealed the secret to what's in the winning formula for success. © 2014 American Society for Nutrition.

  11. ISIAQ Academy Awards 2014

    DEFF Research Database (Denmark)

    Nazaroff, William W.; Clausen, Geo; Wargocki, Pawel

    2014-01-01

    The 13th International Conference on Indoor Air Quality and Climate (Indoor Air 2014) was convened in Hong Kong during the week of 7–12 July 2014. Professor Yuguo Li served as the Conference President. One of many highlights was the presentation of awards from the ISIAQ Academy of Fellows, which...... occurred during the opening plenary session. These awards celebrate high achievements in the indoor air sciences. As described in an earlier editorial (Nazaroff, 2012a), the ISIAQ Academy of Fellows has its origins in the creation of the International Academy of Indoor Air Sciences in 1991. In 2005......, that organization was reconstituted as a part of the International Society of Indoor Air Quality and Climate (ISIAQ). The ISIAQ Academy of Fellows is an international, multidisciplinary, scientific, honorific organization established to promote scholarship in the indoor environment and building sciences. The awards...

  12. Lattice Boltzmann Large Eddy Simulation Model of MHD

    CERN Document Server

    Flint, Christopher

    2016-01-01

    The work of Ansumali \\textit{et al.}\\cite{Ansumali} is extended to Two Dimensional Magnetohydrodynamic (MHD) turbulence in which energy is cascaded to small spatial scales and thus requires subgrid modeling. Applying large eddy simulation (LES) modeling of the macroscopic fluid equations results in the need to apply ad-hoc closure schemes. LES is applied to a suitable mesoscopic lattice Boltzmann representation from which one can recover the MHD equations in the long wavelength, long time scale Chapman-Enskog limit (i.e., the Knudsen limit). Thus on first performing filter width expansions on the lattice Boltzmann equations followed by the standard small Knudsen expansion on the filtered lattice Boltzmann system results in a closed set of MHD turbulence equations provided we enforce the physical constraint that the subgrid effects first enter the dynamics at the transport time scales. In particular, a multi-time relaxation collision operator is considered for the density distribution function and a single rel...

  13. Tomography and generative training with quantum Boltzmann machines

    Science.gov (United States)

    Kieferová, Mária; Wiebe, Nathan

    2017-12-01

    The promise of quantum neural nets, which utilize quantum effects to model complex data sets, has made their development an aspirational goal for quantum machine learning and quantum computing in general. Here we provide methods of training quantum Boltzmann machines. Our work generalizes existing methods and provides additional approaches for training quantum neural networks that compare favorably to existing methods. We further demonstrate that quantum Boltzmann machines enable a form of partial quantum state tomography that further provides a generative model for the input quantum state. Classical Boltzmann machines are incapable of this. This verifies the long-conjectured connection between tomography and quantum machine learning. Finally, we prove that classical computers cannot simulate our training process in general unless BQP=BPP , provide lower bounds on the complexity of the training procedures and numerically investigate training for small nonstoquastic Hamiltonians.

  14. Finite-element lattice Boltzmann simulations of contact line dynamics

    Science.gov (United States)

    Matin, Rastin; Krzysztof Misztal, Marek; Hernández-García, Anier; Mathiesen, Joachim

    2018-01-01

    The lattice Boltzmann method has become one of the standard techniques for simulating a wide range of fluid flows. However, the intrinsic coupling of momentum and space discretization restricts the traditional lattice Boltzmann method to regular lattices. Alternative off-lattice Boltzmann schemes exist for both single- and multiphase flows that decouple the velocity discretization from the underlying spatial grid. The current study extends the applicability of these off-lattice methods by introducing a finite element formulation that enables simulating contact line dynamics for partially wetting fluids. This work exemplifies the implementation of the scheme and furthermore presents benchmark experiments that show the scheme reduces spurious currents at the liquid-vapor interface by at least two orders of magnitude compared to a nodal implementation and allows for predicting the equilibrium states accurately in the range of moderate contact angles.

  15. Using NEKTON to solve systems of discrete Boltzmann equations

    Energy Technology Data Exchange (ETDEWEB)

    Torczynski, J.R.

    1992-01-01

    A discrete-velocity-gas (DVG) model of the Boltzmann equation that employs four velocity states has been implemented numerically by using the computational fluid dynamics code NEKTON to solve the DVG species-transport (discrete Boltzmann) equations. The model is applicable to rarefied two-dimensional isothermal flow and is used to simulate flow through a channel. As expected, the velocity profile is found to be uniform for large Knudsen numbers (free molecular flow) and parabolic for small Knudsen numbers (near continuum flow). Since there are no conceptual differences between the four-state model and models employing more velocity states to better represent the Boltzmann equation, implementation of models with more velocity states appear to be straightforward.

  16. Using NEKTON to solve systems of discrete Boltzmann equations

    Energy Technology Data Exchange (ETDEWEB)

    Torczynski, J.R.

    1992-08-01

    A discrete-velocity-gas (DVG) model of the Boltzmann equation that employs four velocity states has been implemented numerically by using the computational fluid dynamics code NEKTON to solve the DVG species-transport (discrete Boltzmann) equations. The model is applicable to rarefied two-dimensional isothermal flow and is used to simulate flow through a channel. As expected, the velocity profile is found to be uniform for large Knudsen numbers (free molecular flow) and parabolic for small Knudsen numbers (near continuum flow). Since there are no conceptual differences between the four-state model and models employing more velocity states to better represent the Boltzmann equation, implementation of models with more velocity states appear to be straightforward.

  17. UK businesses bag innovation awards

    Science.gov (United States)

    Banks, Michael

    2015-09-01

    Five UK firms have received innovation awards from the Institute of Physics (IOP), which publishes Physics World. Hallmarq Veterinary Imaging, Metrasens, M Squared Lasers, Silixa and Tracerco have all won an IOP award for developing new innovative products.

  18. Lattice gas cellular automata and lattice Boltzmann models an introduction

    CERN Document Server

    Wolf-Gladrow, Dieter A

    2000-01-01

    Lattice-gas cellular automata (LGCA) and lattice Boltzmann models (LBM) are relatively new and promising methods for the numerical solution of nonlinear partial differential equations. The book provides an introduction for graduate students and researchers. Working knowledge of calculus is required and experience in PDEs and fluid dynamics is recommended. Some peculiarities of cellular automata are outlined in Chapter 2. The properties of various LGCA and special coding techniques are discussed in Chapter 3. Concepts from statistical mechanics (Chapter 4) provide the necessary theoretical background for LGCA and LBM. The properties of lattice Boltzmann models and a method for their construction are presented in Chapter 5.

  19. On the dispute between Boltzmann and Gibbs entropy

    Energy Technology Data Exchange (ETDEWEB)

    Buonsante, Pierfrancesco; Franzosi, Roberto, E-mail: roberto.franzosi@ino.it; Smerzi, Augusto

    2016-12-15

    The validity of the concept of negative temperature has been recently challenged by arguing that the Boltzmann entropy (that allows negative temperatures) is inconsistent from a mathematical and statistical point of view, whereas the Gibbs entropy (that does not admit negative temperatures) provides the correct definition for the microcanonical entropy. Here we prove that the Boltzmann entropy is thermodynamically and mathematically consistent. Analytical results on two systems supporting negative temperatures illustrate the scenario we propose. In addition we numerically study a lattice system to show that negative temperature equilibrium states are accessible and obey standard statistical mechanics prediction.

  20. Revisiting Boltzmann learning: parameter estimation in Markov random fields

    DEFF Research Database (Denmark)

    Hansen, Lars Kai; Andersen, Lars Nonboe; Kjems, Ulrik

    1996-01-01

    This article presents a generalization of the Boltzmann machine that allows us to use the learning rule for a much wider class of maximum likelihood and maximum a posteriori problems, including both supervised and unsupervised learning. Furthermore, the approach allows us to discuss regularization...... and generalization in the context of Boltzmann machines. We provide an illustrative example concerning parameter estimation in an inhomogeneous Markov field. The regularized adaptation produces a parameter set that closely resembles the “teacher” parameters, hence, will produce segmentations that closely reproduce...

  1. Large Time Behavior of the Vlasov-Poisson-Boltzmann System

    Directory of Open Access Journals (Sweden)

    Li Li

    2013-01-01

    Full Text Available The motion of dilute charged particles can be modeled by Vlasov-Poisson-Boltzmann system. We study the large time stability of the VPB system. To be precise, we prove that when time goes to infinity, the solution of VPB system tends to global Maxwellian state in a rate Ot−∞, by using a method developed for Boltzmann equation without force in the work of Desvillettes and Villani (2005. The improvement of the present paper is the removal of condition on parameter λ as in the work of Li (2008.

  2. Galilean-invariant lattice-Boltzmann models with H theorem.

    Science.gov (United States)

    Boghosian, Bruce M; Love, Peter J; Coveney, Peter V; Karlin, Iliya V; Succi, Sauro; Yepez, Jeffrey

    2003-08-01

    We demonstrate that the requirement of Galilean invariance determines the choice of H function for a wide class of entropic lattice-Boltzmann models for the incompressible Navier-Stokes equations. The required H function has the form of the Burg entropy for D=2, and of a Tsallis entropy with q=1-(2/D) for D>2, where D is the number of spatial dimensions. We use this observation to construct a fully explicit, unconditionally stable, Galilean-invariant, lattice-Boltzmann model for the incompressible Navier-Stokes equations, for which attainable Reynolds number is limited only by grid resolution.

  3. On a Boltzmann-type price formation model

    KAUST Repository

    Burger, Martin

    2013-06-26

    In this paper, we present a Boltzmann-type price formation model, which is motivated by a parabolic free boundary model for the evolution of price presented by Lasry and Lions in 2007. We discuss the mathematical analysis of the Boltzmann-type model and show that its solutions converge to solutions of the model by Lasry and Lions as the transaction rate tends to infinity. Furthermore, we analyse the behaviour of the initial layer on the fast time scale and illustrate the price dynamics with various numerical experiments. © 2013 The Author(s) Published by the Royal Society. All rights reserved.

  4. Awards and honours

    CERN Multimedia

    ATLAS

    2009-01-01

    On the occasion of the international woman day, on 7 March, Fabiola Gianotti, ATLAS spokesperson, was awarded “Commendatore della Repubblica Italiana” by the Italian President for her “scientific knowledge and her excellent management skills demonstrated in guiding the ATLAS project”.

  5. ATLAS Thesis Award 2017

    CERN Multimedia

    Anthony, Katarina

    2018-01-01

    Winners of the ATLAS Thesis Award were presented with certificates and glass cubes during a ceremony on 22 February, 2018. They are pictured here with Karl Jakobs (ATLAS Spokesperson), Max Klein (ATLAS Collaboration Board Chair) and Katsuo Tokushuku (ATLAS Collaboration Board Deputy Chair).

  6. ATLAS Thesis Awards 2015

    CERN Multimedia

    Biondi, Silvia

    2016-01-01

    Winners of the ATLAS Thesis Award were presented with certificates and glass cubes during a ceremony on Thursday 25 February. The winners also presented their work in front of members of the ATLAS Collaboration. Winners: Javier Montejo Berlingen, Barcelona (Spain), Ruth Pöttgen, Mainz (Germany), Nils Ruthmann, Freiburg (Germany), and Steven Schramm, Toronto (Canada).

  7. Global Cancer Humanitarian Award

    Science.gov (United States)

    Pat Garcia-Gonzalez of the Max Foundation accepted the first annual NCI Global Cancer Medicine Humanitarian Award for her work in chronic myeloid leukemia at the NCI, Center for Global Health Symposium for Global Cancer Research, held in Boston on March 25, 2015.

  8. IDRC Doctoral Research Awards

    International Development Research Centre (IDRC) Digital Library (Canada)

    test

    Methodology. • Tentative schedule of field activities. • Ethical considerations. • Gender implications ... List of courses completed and to be completed in the program. • Confirmation that all your course work will be completed and comprehensive/oral exams passed before the award commences. • Confirmation that you have ...

  9. Research Award: Canadian Partnerships

    International Development Research Centre (IDRC) Digital Library (Canada)

    Corey Piccioni

    2013-08-07

    Aug 7, 2013 ... IDRC is one of the world's leaders in generang new knowledge to meet global challenges. We offer a number of research awards providing a unique opportunity to enhance research skills and gain a fresh perspecve on crucial development issues. These one‐year, paid, in‐house programs of training and ...

  10. International Humanitarian Award.

    Science.gov (United States)

    2017-12-01

    The International Humanitarian Award recognizes extraordinary humanitarian services and activism by psychologists, including professional and volunteer work conducted primarily in the field with underserved populations. Award recipients are psychologists who, by their extraordinary service at a difficult time, improve the lives and contribute to the well-being of people in a large or small geographic area anywhere in the world. The 2017 recipient of the APA International Humanitarian Award was selected by the 2016 Committee on International Relations in Psychology (CIRP). The members of the 2016 CIRP were Melissa Morgan Consoli, PhD, and Arpana G. Inman, PhD (Co-chairs); Rehman Abdulrehman, PhD; Gonzalo Bacigalupe, EdD; Frederic Bemak, EdD; Brigitte Khoury, PhD; Susan Nolan, PhD; Nancy Sidun, PsyD; and Danny Wedding, PhD. Dr. Morgan Consoli, Dr. Inman, Dr. Nolan, and Doctor Sidun were members of the subcommittee for the 2017 award. (PsycINFO Database Record (c) 2017 APA, all rights reserved).

  11. Research Award: Climate Change

    International Development Research Centre (IDRC) Digital Library (Canada)

    Office 2004 Test Drive User

    These one‐year, paid, in‐house programs of training and mentorship allow award holders to pursue their research goals and work in one of IDRC's dynamic ... relevance of the proposed research to local, national, and/or regional policy debates in at least one of the following regions: Africa, Asia, or Latin America and the.

  12. C. Cybele Raver: Award for Distinguished Contributions of Applications of Psychology to Education and Training.

    Science.gov (United States)

    2012-11-01

    Presents a short biography of the 2012 winner of the American Psychological Association's Award for Distinguished Contributions of Applications of Psychology to Education and Training. C. Cybele Raver is a prolific and award-winning writer who has published widely and served as a reviewer on many high-quality journals. Her publications are well cited, and she has received support from numerous foundations and federal sources. One of the most highly respected scholars and investigators in developmental science, she studies the various factors that affect children's self-regulation and consequently their academic readiness. Her research has revealed effective new strategies for prevention and intervention at home and at school for the most educationally and economically challenged children. Raver's Award citation and a selected bibliography are also presented. PsycINFO Database Record (c) 2012 APA, all rights reserved.

  13. Customer Satisfaction Perceptions of Dislocated Workers Served by WIN Job Centers in the Mississippi Corridor Consortium

    Science.gov (United States)

    Washburn, Dava Michelle

    2009-01-01

    The purpose of this study was to determine the perceptions of satisfaction of dislocated workers served by WIN Job Centers in the Mississippi Corridor Consortium. Four WIN Job Centers participated in this study: Northeast Mississippi Community College WIN Job Center in Corinth, Northwest Mississippi Community College WIN Job Center in Oxford,…

  14. Virginia Tech students win national championship in financial planning

    OpenAIRE

    Elliott, Jean

    2004-01-01

    Three Virginia Tech students, all seniors studying financial planning in the College of Liberal Arts and Human Sciences, teamed up to win the 2004 American Express Financial Planning Invitational, bringing home $10,000 in scholarship money for the institution.

  15. Immiscible multicomponent lattice Boltzmann model for fluids with ...

    Indian Academy of Sciences (India)

    An immiscible multicomponent lattice Boltzmann model is developed for fluids with high relaxation time ratios, which is based on the model proposed by Shan and Chen (SC). In the SC model, ... Ruofan Qiu1 Anlin Wang1. College of Mechanical Engineering, Tongji University, 4800# Cao'an Road, Shanghai 201804, China ...

  16. Distribution Learning in Evolutionary Strategies and Restricted Boltzmann Machines

    DEFF Research Database (Denmark)

    Krause, Oswin

    The thesis is concerned with learning distributions in the two settings of Evolutionary Strategies (ESs) and Restricted Boltzmann Machines (RBMs). In both cases, the distributions are learned from samples, albeit with different goals. Evolutionary Strategies are concerned with finding an optimum...

  17. Metamaterial characterization using Boltzmann's kinetic equation for electrons

    DEFF Research Database (Denmark)

    Novitsky, Andrey; Zhukovsky, Sergei; Novitsky, D.

    2013-01-01

    Statistical properties of electrons in metals are taken into consideration to describe the microscopic motion of electrons. Assuming degenerate electron gas in metal, we introduce the Boltzmann kinetic equation to supplement Maxwell's equations. The solution of these equations clearly shows the r...

  18. Lattice Boltzmann scheme for diffusion on triangular grids

    NARCIS (Netherlands)

    Sman, van der R.G.M.

    2003-01-01

    In this paper we present a Lattice Boltzmann scheme for diffusion on it unstructured triangular grids. In this formulation of a LB for irregular grids there is no need for interpolation, which is required in other LB schemes on irregular grids. At the end of the propagation step the lattice gas

  19. Convection-diffusion lattice Boltzmann scheme for irregular lattices

    NARCIS (Netherlands)

    Sman, van der R.G.M.; Ernst, M.H.

    2000-01-01

    In this paper, a lattice Boltzmann (LB) scheme for convection diffusion on irregular lattices is presented, which is free of any interpolation or coarse graining step. The scheme is derived using the axioma that the velocity moments of the equilibrium distribution equal those of the

  20. Entropy and Galilean invariance of lattice Boltzmann theories.

    Science.gov (United States)

    Chikatamarla, Shyam S; Karlin, Iliya V

    2006-11-10

    A theory of lattice Boltzmann (LB) models for hydrodynamic simulation is developed upon a novel relation between entropy construction and roots of Hermite polynomials. A systematic procedure is described for constructing numerically stable and complete Galilean invariant LB models. The stability of the new LB models is illustrated with a shock tube simulation.

  1. Diffusion on unstructured triangular grids using Lattice Boltzmann

    NARCIS (Netherlands)

    Sman, van der R.G.M.

    2004-01-01

    In this paper, we present a Lattice Boltzmann scheme for diffusion on unstructured triangular grids. In this formulation there is no need for interpolation, as is required in other LB schemes on irregular grids. At the end of the propagation step, the lattice gas particles arrive exactly at

  2. Measuring Boltzmann's Constant with Carbon Dioxide

    Science.gov (United States)

    Ivanov, Dragia; Nikolov, Stefan

    2013-01-01

    In this paper we present two experiments to measure Boltzmann's constant--one of the fundamental constants of modern-day physics, which lies at the base of statistical mechanics and thermodynamics. The experiments use very basic theory, simple equipment and cheap and safe materials yet provide very precise results. They are very easy and…

  3. Nonequilibrium phenomena in QCD and BEC. Boltzmann and beyond

    Energy Technology Data Exchange (ETDEWEB)

    Stockamp, T.

    2006-12-22

    In chapter 2 we chose the real time formalism to discuss some basic principles in quantum field theory at finite temperature. This enables us to derive the quantum Boltzmann equation from the Schwinger-Dyson series. We then shortly introduce the basic concepts of QCD which are needed to understand the physics of QGP formation. After a detailed account on the bottom-up scenario we show the consistency of this approach by a diagramatical analysis of the relevant Boltzmann collision integrals. Chapter 3 deals with BEC dynamics out of equilibrium. After an introduction to the fundamental theoretical tool - namely the Gross-Pitaevskii equation - we focus on a generalization to finite temperature developed by Zaremba, Nikuni and Griffin (ZNG). These authors use a Boltzmann equation to describe the interactions between condensed and excited atoms and manage in this way to describe condensate growth. We then turn to a discussion on the 2PI effective action and derive equations of motion for a relativistic scalar field theory. In the nonrelativistic limit these equations are shown to coincide with the ZNG theory when a quasiparticle approximation is applied. Finally, we perform a numerical analysis of the full 2PI equations. These remain valid even at strong coupling and far from equilibrium, and thus go far beyond Boltzmann's approach. For simplicity, we limit ourselves to a homogeneous system and present the first 3+1 dimensional study of condensate melting. (orig.)

  4. Lattice Boltzmann simulations of droplet formation during microchannel emulsification

    NARCIS (Netherlands)

    Zwan, van der E.A.; Sman, van der R.G.M.; Schroën, C.G.P.H.; Boom, R.M.

    2009-01-01

    In this study, we compared microchannel droplet formation in a microfluidics device with a two phase lattice Boltzmann simulation. The droplet formation was found to be qualitatively described, with a slightly smaller droplet in the simulation. This was due to the finite thickness of the interface

  5. CMS Industries awarded gold, crystal

    CERN Multimedia

    2006-01-01

    The CMS collaboration honoured 10 of its top suppliers in the seventh annual awards ceremony The representatives of the firms that recieved the CMS Gold and Crystal Awards stand with their awards after the ceremony. The seventh annual CMS Awards ceremony was held on Monday 13 March to recognize the industries that have made substantial contributions to the construction of the collaboration's detector. Nine international firms received Gold Awards, and General Tecnica of Italy received the prestigious Crystal Award. Representatives from the companies attended the ceremony during the plenary session of CMS week. 'The role of CERN, its machines and experiments, beyond particle physics is to push the development of equipment technologies related to high-energy physics,'said CMS Awards Coordinator Domenico Campi. 'All of these industries must go beyond the technologies that are currently available.' Without the involvement of good companies over the years, the construction of the CMS detector wouldn't be possible...

  6. CERN repeats last year's running win

    CERN Multimedia

    2000-01-01

    The CERN first team successfully defended the title won last year in the 20th annual Cross Inter-Entreprises held at Collex-Bossy on Saturday 7 October. 101 teams of four runners representing firms from all over the Geneva area finished the 6.2 km race, through forest and over fields. In spite of two members of last year’s winning team being absent through injury this time, the first team was still 38 seconds faster than in 1999. The second and third CERN teams also excelled with places in the first 15 teams. In this race the teams start at one-minute intervals and the time of each team is that of its third runner to finish, so they try to run in a group of three or four all the way. The full results of all teams can be found at: http://www.Club-association.ch/CHP Placings of the CERN teams 1st 21:53 Cornelis, Ecarnot, Ehmele, Nisbet 6th 22:50 Cornet, Eklund, Rick, Ruiz Llamas 13th 24:24 Dunkel, Guillot, Montejo Raez, Zamiatin 35th 28:22 Cameron, Galbraith, Revol, Scalisi

  7. Awards and honours

    CERN Multimedia

    2009-01-01

    President of the Italian Republic, Giorgio Napolitano, presenting Fabiola Gianotti with her award on 7 March.On the occasion of International Woman’s Day on 7 March, Fabiola Gianotti, ATLAS spokesperson, was awarded "Commendatore della Repubblica Italiana" by the Italian President for her "scientific knowledge and her excellent management skills demonstrated in guiding the ATLAS project". Gianotti received the honorary title also for "her contribution to the prestige of the Italian scientific community in the field of nuclear physics." Further reading (in Italian only): http://www.quirinale.it/Comunicati/Comunicato.asp?id=38192 An article about the beginning of Gianotti’s term of office as ATLAS spokesperson is available from the latest issue of the CERN Courier: http://cerncourier.com/cws/article/cern/38709

  8. Italian students win a trip to CERN

    CERN Multimedia

    2006-01-01

    The six winners of the Progetto Lauree Scientifiche came to CERN to discover the LHC experiments. Six Italian high-school students visited CERN last week as part of a biennial project sponsored by the Italian Research ministry, the University of Ferrara and INFN. A total of 160 enthusiastic students took part in the project, which aims to introduce and foster interest in higher levels of science and technology. The Progetto Lauree Scientifiche prize was awarded to these students for their excellent grades in an examination covering various areas of physics, including laser, solid and particle physics. The winners spent six days at CERN touring the Laboratory and seeing first-hand the various aspects of research in one of the leading European centres, as well as the excitement of the particle physics adventure.

  9. Conductive concrete wins Popular Science prize

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1997-06-01

    A conductive concrete developed by a research team at IRC (Institute for Research in Construction, National Research Council of Canada) has won a prize in the home technology category because of its possible use in heating homes. Following the award, there have been a number of inquiries regarding possible applications for the concrete. Greatest interests in the concrete have been in its potential to heat buildings by using it as flooring. Other possible applications included de-icing pavements to building warming pads for parking aircraft. Essentially, carbon fibres and conductive particles are added to a concrete mix in such a quantity that they form a network within the mix, ensuring high electrical conductivity. A demonstration project is underway to build a 20 by 80 foot conductive concrete pad to test the material`s capability as a snow removal and de-icing tool.

  10. Ombud's Corner: fellows and students – a win-win equation

    CERN Multimedia

    Sudeshna Datta-Cockerill

    2014-01-01

    The hundreds of Fellows and students working at CERN bring precious new blood into the Laboratory. At the same time, CERN offers them invaluable work experience that will have a significant impact on their future careers. It is important that we all work together to make this a win-win situation with lasting positive effects for all concerned over the years to come.   Fellows and students are just setting out on a great professional adventure.  Some of them are very young, others are a bit more experienced … and what happens during this early period can have vast consequences on their approach to work and indeed on their overall careers. They all come here with their hard earned skills and a high degree of motivation, ready to make the most out of an internship at CERN. Sometimes, they are called to integrate into well-established units; at other times, they are asked to join complex collaborations. Almost always they have to deal with new information, new cultures, new t...

  11. CMS Thesis Award

    CERN Multimedia

    2004-01-01

    The 2003 CMS thesis award was presented to Riccardo Ranieri on 15 March for his Ph.D. thesis "Trigger Selection of WH → μ ν b bbar with CMS" where 'WH → μ ν b bbar' represents the associated production of the W boson and the Higgs boson and their subsequent decays. Riccardo received his Ph.D. from the University of Florence and was supervised by Carlo Civinini. In total nine thesis were nominated for the award, which was judged on originality, impact within the field of high energy physics, impact within CMS and clarity of writing. Gregory Snow, secretary of the awarding committee, explains why Riccardo's thesis was chosen, ‘‘The search for the Higgs boson is one of the main physics goals of CMS. Riccardo's thesis helps the experiment to formulate the strategy which will be used in that search.'' Lorenzo Foà, Chairperson of the CMS Collaboration Board, presented Riccardo with an commemorative engraved plaque. He will also receive the opportunity to...

  12. Return migration as a win-win-win scenario? Visions of return among Senegalese migrants, the state of origin and receiving countries

    NARCIS (Netherlands)

    Sinatti, G.

    2015-01-01

    This article explores the topic of return migration as it is understood and practised by different actors who engage with this theme, albeit from different perspectives. Return migration is paraded in policy debates as a triple-win scenario, bringing advantages to receiving states, countries of

  13. 31 CFR 20.605 - Award.

    Science.gov (United States)

    2010-07-01

    ... 31 Money and Finance: Treasury 1 2010-07-01 2010-07-01 false Award. 20.605 Section 20.605 Money...-FREE WORKPLACE (FINANCIAL ASSISTANCE) Definitions § 20.605 Award. Award means an award of financial... award includes: (1) A Federal grant or cooperative agreement, in the form of money or property in lieu...

  14. Chandra Telescope Designer Wins 2002 Rossi Prize

    Science.gov (United States)

    2002-01-01

    Leon Van Speybroeck of the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts has been awarded the 2002 Bruno Rossi Prize of the High Energy Astrophysics Division of the American Astronomical Society. The Rossi Prize recognizes significant contributions in high-energy astrophysics. It is awarded annually in honor of the late Massachusetts Institute of Technology Professor Bruno Rossi, an authority on cosmic ray physics and a pioneer in the field of X-ray astronomy. The prize also includes an engraved certificate and a $1,500 award. Van Speybroeck, who led the effort to design and make the X-ray mirrors for NASA's premier X­ray observatory, the Chandra X-ray Observatory, was recognized for a career of stellar achievements in designing precision X-ray optics. As Telescope Scientist for Chandra, he has worked for more than 20 years with a team that includes scientists and engineers from the Harvard-Smithsonian, NASA's Marshall Space Flight Center, TRW, Inc., Hughes-Danbury (now B.F. Goodrich Aerospace), Optical Coating Laboratories, Inc., and Eastman-Kodak on all aspects of the X-ray mirror assembly that is the heart of the observatory. "Leon is one of the master mirror designers of our time," said Harvey Tananbaum, director of the Chandra X-ray Center. "His contributions were crucial to the spectacular success of the Chandra mission." The Chandra mirrors are the most precise mirrors ever made, smooth with tolerances of a few atoms. If the state of Colorado had the same relative smoothness as the surface of the Chandra X-ray Observatory mirrors, Pike's Peak would be less than an inch tall. The smoothness and alignment of the Chandra's mirrors are enabling scientists to make new discoveries about black holes, neutron stars, and galactic explosions. "Many, many other people made essential contributions to the Chandra program, and hopefully some of them will receive proper recognition," said Van Speybroeck. "In the meantime, I am thoroughly enjoying

  15. Riemann-Theta Boltzmann Machine arXiv

    CERN Document Server

    Krefl, Daniel; Haghighat, Babak; Kahlen, Jens

    A general Boltzmann machine with continuous visible and discrete integer valued hidden states is introduced. Under mild assumptions about the connection matrices, the probability density function of the visible units can be solved for analytically, yielding a novel parametric density function involving a ratio of Riemann-Theta functions. The conditional expectation of a hidden state for given visible states can also be calculated analytically, yielding a derivative of the logarithmic Riemann-Theta function. The conditional expectation can be used as activation function in a feedforward neural network, thereby increasing the modelling capacity of the network. Both the Boltzmann machine and the derived feedforward neural network can be successfully trained via standard gradient- and non-gradient-based optimization techniques.

  16. Accelerated Monte Carlo simulations with restricted Boltzmann machines

    Science.gov (United States)

    Huang, Li; Wang, Lei

    2017-01-01

    Despite their exceptional flexibility and popularity, Monte Carlo methods often suffer from slow mixing times for challenging statistical physics problems. We present a general strategy to overcome this difficulty by adopting ideas and techniques from the machine learning community. We fit the unnormalized probability of the physical model to a feed-forward neural network and reinterpret the architecture as a restricted Boltzmann machine. Then, exploiting its feature detection ability, we utilize the restricted Boltzmann machine to propose efficient Monte Carlo updates to speed up the simulation of the original physical system. We implement these ideas for the Falicov-Kimball model and demonstrate an improved acceptance ratio and autocorrelation time near the phase transition point.

  17. Comparison of Einstein-Boltzmann solvers for testing general relativity

    Science.gov (United States)

    Bellini, E.; Barreira, A.; Frusciante, N.; Hu, B.; Peirone, S.; Raveri, M.; Zumalacárregui, M.; Avilez-Lopez, A.; Ballardini, M.; Battye, R. A.; Bolliet, B.; Calabrese, E.; Dirian, Y.; Ferreira, P. G.; Finelli, F.; Huang, Z.; Ivanov, M. M.; Lesgourgues, J.; Li, B.; Lima, N. A.; Pace, F.; Paoletti, D.; Sawicki, I.; Silvestri, A.; Skordis, C.; Umiltà, C.; Vernizzi, F.

    2018-01-01

    We compare Einstein-Boltzmann solvers that include modifications to general relativity and find that, for a wide range of models and parameters, they agree to a high level of precision. We look at three general purpose codes that primarily model general scalar-tensor theories, three codes that model Jordan-Brans-Dicke (JBD) gravity, a code that models f (R ) gravity, a code that models covariant Galileons, a code that models Hořava-Lifschitz gravity, and two codes that model nonlocal models of gravity. Comparing predictions of the angular power spectrum of the cosmic microwave background and the power spectrum of dark matter for a suite of different models, we find agreement at the subpercent level. This means that this suite of Einstein-Boltzmann solvers is now sufficiently accurate for precision constraints on cosmological and gravitational parameters.

  18. Simple and robust solver for the Poisson-Boltzmann equation

    Science.gov (United States)

    Baptista, M.; Schmitz, R.; Dünweg, B.

    2009-07-01

    A variational approach is used to develop a robust numerical procedure for solving the nonlinear Poisson-Boltzmann equation. Following Maggs and Rossetto [Phys. Rev. Lett. 88, 196402 (2002)], we construct an appropriate constrained free energy functional such that its Euler-Lagrange equations are equivalent to the Poisson-Boltzmann equation. This is a formulation that searches for a true minimum in function space, in contrast to previous variational approaches that rather searched for a saddle point. We then develop, implement, and test an algorithm for its numerical minimization, which is quite simple and unconditionally stable. The analytic solution for planar geometry is used for validation. Some results are presented for a charged colloidal sphere surrounded by counterions and optimizations based upon fast Fourier transforms and hierarchical preconditioning are briefly discussed.

  19. Two Dimensional Lattice Boltzmann Method for Cavity Flow Simulation

    OpenAIRE

    Panjit MUSIK; Krisanadej JAROENSUTASINEE

    2004-01-01

    This paper presents a simulation of incompressible viscous flow within a two-dimensional square cavity. The objective is to develop a method originated from Lattice Gas (cellular) Automata (LGA), which utilises discrete lattice as well as discrete time and can be parallelised easily. Lattice Boltzmann Method (LBM), known as discrete Lattice kinetics which provide an alternative for solving the Navier–Stokes equations and are generally used for fluid simulation, is chosen for the study. A spec...

  20. The relativistic Boltzmann equation on a spherically symmetric gravitational field

    Science.gov (United States)

    Takou, Etienne; Ciake Ciake, Fidèle L.

    2017-10-01

    In this paper, we consider the Cauchy problem for the relativistic Boltzmann equation with near vacuum initial data where the distribution function depends on the time, the position and the impulsion. We consider this equation on a spherically symmetric gravitational field spacetime. The collision kernel considered here is for the hard potentials case. We prove the existence of a unique global (in time) mild solution in a suitable weighted space.

  1. Boltzmann learning of parameters in cellular neural networks

    DEFF Research Database (Denmark)

    Hansen, Lars Kai

    1992-01-01

    The use of Bayesian methods to design cellular neural networks for signal processing tasks and the Boltzmann machine learning rule for parameter estimation is discussed. The learning rule can be used for models with hidden units, or for completely unsupervised learning. The latter is exemplified...... by unsupervised adaptation of an image segmentation cellular network. The learning rule is applied to adaptive segmentation of satellite imagery...

  2. Distributional monte carlo methods for the boltzmann equation

    Science.gov (United States)

    Schrock, Christopher R.

    Stochastic particle methods (SPMs) for the Boltzmann equation, such as the Direct Simulation Monte Carlo (DSMC) technique, have gained popularity for the prediction of flows in which the assumptions behind the continuum equations of fluid mechanics break down; however, there are still a number of issues that make SPMs computationally challenging for practical use. In traditional SPMs, simulated particles may possess only a single velocity vector, even though they may represent an extremely large collection of actual particles. This limits the method to converge only in law to the Boltzmann solution. This document details the development of new SPMs that allow the velocity of each simulated particle to be distributed. This approach has been termed Distributional Monte Carlo (DMC). A technique is described which applies kernel density estimation to Nanbu's DSMC algorithm. It is then proven that the method converges not just in law, but also in solution for Linfinity(R 3) solutions of the space homogeneous Boltzmann equation. This provides for direct evaluation of the velocity density function. The derivation of a general Distributional Monte Carlo method is given which treats collision interactions between simulated particles as a relaxation problem. The framework is proven to converge in law to the solution of the space homogeneous Boltzmann equation, as well as in solution for Linfinity(R3) solutions. An approach based on the BGK simplification is presented which computes collision outcomes deterministically. Each technique is applied to the well-studied Bobylev-Krook-Wu solution as a numerical test case. Accuracy and variance of the solutions are examined as functions of various simulation parameters. Significantly improved accuracy and reduced variance are observed in the normalized moments for the Distributional Monte Carlo technique employing discrete BGK collision modeling.

  3. The high-order Boltzmann machine: learned distribution and topology.

    Science.gov (United States)

    Albizuri, F X; Danjou, A; Grana, M; Torrealdea, J; Hernandez, M C

    1995-01-01

    In this paper we give a formal definition of the high-order Boltzmann machine (BM), and extend the well-known results on the convergence of the learning algorithm of the two-order BM. From the Bahadur-Lazarsfeld expansion we characterize the probability distribution learned by the high order BM. Likewise a criterion is given to establish the topology of the BM depending on the significant correlations of the particular probability distribution to be learned.

  4. Planar Approximation as Two-Field Boltzmann Theory

    OpenAIRE

    Aref'eva, I. Ya.

    1996-01-01

    A modified interaction representation for the master field describing connected $SU(N)$-invariant Wightman's functions in the large $N$ limit of matrix fields is constructed. This construction is based on the representation of the master field in terms of Boltzmannian field theory found before. In the modified interaction representation we deal with two scalar Boltzmann fields ({\\it up} and {\\it down} fields). For up and down fields only half-planar diagrams contribute and this could help to ...

  5. Efficient Asymptotic Preserving Deterministic methods for the Boltzmann Equation

    Science.gov (United States)

    2011-04-01

    a density function f(x, v, t) describing the time evolution of a monoatomic rarefied gas of particles which move with velocity v ∈ IR3 in the position...density, and total energy density, satisfy the compressible Euler equations for a monoatomic gas, therefore the model describes the correct fluid dynamic...RTO-EN-AVT-194 8 - 13 1 THE BOLTZMANN EQUATION 1.5 Other collision operators model for a monoatomic gas leads to a Prandtl number very close to

  6. Winning at litigation through decision analysis creating and executing winning strategies in any litigation or dispute

    CERN Document Server

    Celona, John

    2016-01-01

    This book is the first in-depth guide to applying the philosophy, theory, and methods of decision analysis to creating and executing winning legal strategies. With explanations that progress from introductory to advanced and practice problems at the end of each chapter, this is a book the reader will want to use and refer to for years to come. Practicing decision analysts, operations research and management science students, attorneys and law students will find this book an invaluable addition to their knowledge and skills. John Celona has over three decades of experience in teaching and applying decision analysis. John lectures in the School of Engineering at Stanford University and is on faculty at The Stanford Center for Professional Development, the American Course on Drug Development and Regulatory Sciences, and the Academy of the American Society for Healthcare Risk Management.

  7. Entropic multirelaxation lattice Boltzmann models for turbulent flows.

    Science.gov (United States)

    Bösch, Fabian; Chikatamarla, Shyam S; Karlin, Ilya V

    2015-10-01

    We present three-dimensional realizations of a class of lattice Boltzmann models introduced recently by the authors [I. V. Karlin, F. Bösch, and S. S. Chikatamarla, Phys. Rev. E 90, 031302(R) (2014)] and review the role of the entropic stabilizer. Both coarse- and fine-grid simulations are addressed for the Kida vortex flow benchmark. We show that the outstanding numerical stability and performance is independent of a particular choice of the moment representation for high-Reynolds-number flows. We report accurate results for low-order moments for homogeneous isotropic decaying turbulence and second-order grid convergence for most assessed statistical quantities. It is demonstrated that all the three-dimensional lattice Boltzmann realizations considered herein converge to the familiar lattice Bhatnagar-Gross-Krook model when the resolution is increased. Moreover, thanks to the dynamic nature of the entropic stabilizer, the present model features less compressibility effects and maintains correct energy and enstrophy dissipation. The explicit and efficient nature of the present lattice Boltzmann method renders it a promising candidate for both engineering and scientific purposes for highly turbulent flows.

  8. 1993 architectural design awards.

    Science.gov (United States)

    1993-06-01

    The 10th annual architectural design awards sponsored by Contemporary Long Term Care salute nursing homes and retirement communities that combine a flair for innovative living environments with a sensitivity to the needs of aging residents. These facilities represent the very best in elderly housing that prolongs independence while enhancing efficient operation. The 1993 winners are: King Health Center, U.S. Soldiers' and Airmen's Home, Washington, DC; The Terrace of Los Gatos, Los Gatos, CA; Walker Elder Suites, Edina, MN; The Jefferson, Ballston, VA; The Forum at Rancho San Antonio, Cupertino, CA.

  9. Award for Steve Myers

    CERN Document Server

    2003-01-01

    Last Thursday Steve Myers, Leader of the Accelerator and Beams Division, received one of the UK Institute of Physics awards. He is the recipient of the 2003 Duddel Medal and Prize for his contributions to the development of major charged-particle accelerator projects at CERN. As head of the commissioning group for the Large Electron Positron (LEP) collider, says the citation, his contributions have had «a direct impact on the results from LEP, which have reached a precision and extent far beyond expectation and are key in defining the Standard Model of particle physics».

  10. Winning at Pocker and Games of Chance Winning at Pocker and Games of Chance

    Directory of Open Access Journals (Sweden)

    Anita Flanders Rebelo

    2008-04-01

    Full Text Available It's the modern consumer mind - compete to eat, save to the grave, throw to the wind to win! Never the game that's im portant - it's the beer , the fag. . . and if you're broke it's just the "odds" to turn you on. "Socrates didn't play dice games. He drank a lot. And when he was drunk he would go watch the game and give advice. It was because of bad advice that he was eventually sentenced to death. . . Back then it was more fun. Nobody knew anything about odds. It was just put down your money, you toss the dice, you laugh, you take another drink." - to Cassidy,it's knowing the odds that's put everybody on pot. Rack Cassidy's Winning at Poker and Games of Chance lampoons the illogic logic of modern "instructed" man. It is a disturbingly funny caricature of a nonsensical consumer's mind trying to ratio nalize the game of life, and what comes out is "hash" - not meat and potatoes. The book is high philosophical slapstick comedy ila Charlie Chaplin on paper in today's scene. To Cassidy, consumer thinking has made intellectual nitwits of us. We're always ex plaining in detail about what we don't have the slightest real understanding of, but we go on and on like automats spitting out words and words which in the long run make no sense to our__ selves and much less to the other poor broken down human calculat ing machines - especially when we try to give logic to our il/logical vices and fears.

  11. Table Summarizing Awards Supported by Fellowships and Awards

    International Development Research Centre (IDRC) Digital Library (Canada)

    Liliane Castets-Poupart

    developing country university. Support is for doctoral research awards, full study degrees, post-doc fellowships, internships and sabbaticals in sub-Saharan. Africa, Asia and Latin. America and the Caribbean. Variable. Managed by various developing country institutions. Variable. Fellowships · http://www.idrc.ca/awards.

  12. Connes' embedding problem and winning strategies for quantum XOR games

    Science.gov (United States)

    Harris, Samuel J.

    2017-12-01

    We consider quantum XOR games, defined in the work of Regev and Vidick [ACM Trans. Comput. Theory 7, 43 (2015)], from the perspective of unitary correlations defined in the work of Harris and Paulsen [Integr. Equations Oper. Theory 89, 125 (2017)]. We show that the winning bias of a quantum XOR game in the tensor product model (respectively, the commuting model) is equal to the norm of its associated linear functional on the unitary correlation set from the appropriate model. We show that Connes' embedding problem has a positive answer if and only if every quantum XOR game has entanglement bias equal to the commuting bias. In particular, the embedding problem is equivalent to determining whether every quantum XOR game G with a winning strategy in the commuting model also has a winning strategy in the approximate finite-dimensional model.

  13. BMC Ecology image competition 2014: the winning images

    Science.gov (United States)

    2014-01-01

    BMC Ecology showcases the winning entries from its second Ecology Image Competition. More than 300 individual images were submitted from an international array of research scientists, depicting life on every continent on earth. The journal’s Editorial Board and guest judge Caspar Henderson outline why their winning selections demonstrated high levels of technical skill and aesthetic sense in depicting the science of ecology, and we also highlight a small selection of highly commended images that we simply couldn’t let you miss out on. PMID:25178017

  14. How Insurgents Win: Examining the Dynamics of Modern Insurgencies

    Science.gov (United States)

    2014-06-01

    this thesis. This study identifies that one case does not meet the second requirement stated in the first chapter. La Violencia in Colombia (1948...with a raw coverage score greater than .25. To see the full list of causal recipes, see Appendix C. 0 50 100 150 200 250 300 350 400 450 D u ra ti o n... o f C o n fl ic t (m o n th s ) Duration of wins vs. losses Insurgent Win N=41 Insurgent Loss N=29 33 percent of the time with no outside

  15. How truth wins in opinion dynamics along issue sequences.

    Science.gov (United States)

    Friedkin, Noah E; Bullo, Francesco

    2017-10-24

    How truth wins in social groups is an important open problem. Classic experiments on social groups dealing with truth statement issues present mixed findings on the conditions of truth abandonment and reaching a consensus on the truth. No theory has been developed and evaluated that might integrate these findings with a mathematical model of the interpersonal influence system that alters some or all of its members' positions on an issue. In this paper we provide evidence that a general model in the network science on opinion dynamics substantially clarifies how truth wins in groups. Published under the PNAS license.

  16. Winning the jackpot and depression: Money cannot buy happiness.

    Science.gov (United States)

    Nisslé, Sonja; Bschor, Tom

    2002-01-01

    Life event research examines the effect of life events on the course of psychiatric diseases, but the published literature considers almost only negative events. We describe the cases of two female patients who had to be hospitalized for depression after lottery winnings of over 1M DM. The 4-year follow-up shows a good outcome in both patients. Case analyses suggest that in both patients, winning was a life event relevant to the development of the depressive episode. Desirable life events might influence the course of a psychiatric illness just as negative events do. (Int J Psych Clin Pract 2002; 6: 183-186).

  17. Research Award: Governance and Justice

    International Development Research Centre (IDRC) Digital Library (Canada)

    Office 2004 Test Drive User

    2015-08-06

    Research Award: Governance and Justice. Deadline: August 6, 2015. Please note that all applications must be submitted online. IDRC is one of the world's leaders in generating new knowledge to meet global challenges. We offer a number of research awards providing a unique opportunity to enhance research skills and ...

  18. Step 4: Award Negotiation & Issuance

    Science.gov (United States)

    Before a grant can be awarded and accepted, several pre-award activities must happen to formalize the partnership. Ensuring compliance with federal laws, a review of costs and a negotiation of the appropriate funding level must all happen in order to rece

  19. Coal-Mac, Inc. Phoenix No. 1 mine provides wildlife haven. 2007 Wildlife West Virginia Award

    Energy Technology Data Exchange (ETDEWEB)

    Skinner, A.

    2007-07-15

    Coal Mac, Inc.'s Harless Wood Industrial Park off Holden 22 Mines Road in Logan Country, West Virginia is an award-winning reclamation site in the mountains frequented by geese, wild turkey, deer and black bears. Orchard grass and rye is a temporary cover for the timothy, clover and other seedlings. The area was mined several years ago. Some 40,000-50,000 tons of coal per month are surfaced mined with the current permit that takes in 1,500-2,000 acres. After removing the coal, valleys are backfilled as part of the mining and reclamation plan. 10 photos.

  20. Assessing carbon stocks and modelling win-win scenarios of carbon sequestration through land-use changes

    Energy Technology Data Exchange (ETDEWEB)

    Ponce-Hernandez, R.; Koohafkan, P.; Antoine, J. (eds.)

    2004-07-01

    This publication presents a methodology and software tools for assessing carbon stocks and modelling scenarios of carbon sequestration that were developed and tested in pilot field studies in Mexico and Cuba. The models and tools enable the analysis of land use change scenarios in order to identify in a given area (watershed or district) land use alternatives and land management practices that simultaneously maximize food production, maximize soil carbon sequestration, maximize biodiversity conservation and minimize land degradation. The objective is to develop and implement 'win-win' options that satisfy the multiple goals of farmers, land users and other stakeholders in relation to food security, carbon sequestration, biodiversity and land conservation.

  1. Substituting sugar confectionery with fruit and healthy snacks at checkout - a win-win strategy for consumers and food stores?

    DEFF Research Database (Denmark)

    Winkler, Lise L.; Christensen, Ulla; Glümer, Charlotte

    2016-01-01

    intervention awareness was modest. Most participants believed that the intervention could help other consumers make healthier choices, while fewer expected to be influenced by the intervention themselves. Statistical analyses suggested an intervention effect on sales of carrot snack packs when compared...... a 'responsible' branding opportunity for supermarkets, thus representing a win-win strategy for store managers and consumers in the short term. However, the intervention was too modest to draw conclusions on long-term sales and health implications of this initiative. More research is needed to assess whether...

  2. Awards and Honours

    CERN Multimedia

    Katarina Anthony

    2010-01-01

    Graphene collects the Nobel prize   Nobel Prize winners Andre Geim (left) and Konstantin Novoselov (right). © Sergeom, Wikimedia Commons, and University of Manchester, UK. The Nobel Prize in Physics for 2010 has been awarded to Andre Geim and Konstantin Novoselov, both from the University of Manchester, for their “groundbreaking experiments regarding the two-dimensional material graphene”. Graphene has exceptional properties that have made it a micro-laboratory for quantum physics. Not only is graphene the thinnest material ever made, it is also the strongest, as well as being an excellent conductor and almost completely transparent. At a time when many researchers believed that it was impossible for such thin materials to be stable, Geim and Novoselov extracted graphene from a piece of graphite using only normal adhesive tape. Novoselov, 36, first worked with Andre Geim, 51, as a PhD student in the Netherlands. He subsequentl...

  3. The Probability of Winning a Lotto Jackpot Twice.

    Science.gov (United States)

    Noone, Emeric T., Jr.

    2000-01-01

    Proposes lotto games as a source of problems and exercises for classroom activities as well as applications of basic probability concepts in a practical setting which leads to a greater understanding of the remote chance anyone has of winning a lottery game. (KHR)

  4. License auctions when winning bids are financed through debt

    NARCIS (Netherlands)

    Haan, M.A.; Toolsema-Veldman, Linda

    2006-01-01

    We study an auction where two licenses to operate on a new market are sold, and winning bidders finance their bids on the debt market. Higher bids imply higher debts, which affects product market competition. We compare our results to those of a beauty contest and a standard auction. For the case

  5. Assessment of a WIN Quality Training Demonstration Program. Final Report.

    Science.gov (United States)

    White, Richard N.; And Others

    A project was begun in 1978 to test the feasibility of a high-skill training program that would prepare welfare recipients for well-paying jobs in the private sector. The training for this specially selected Work Incentive Program (WIN) was to be provided by two Bell and Howell schools, one in Columbus, Ohio, and the other in Chicago. Training…

  6. Time-Motion Analysis: Discriminating between winning and losing ...

    African Journals Online (AJOL)

    The ProZone version 3 time-motion analysis program was used to gather data from 18 matches (Test and Super 14 Rugby). Average distances covered by positional groups ranged from 5816m for front rows to 7166m for inside backs. No significant differences (p<0.05) were found between the winning and losing teams.

  7. Fed up: winning the war against childhood obesity

    National Research Council Canada - National Science Library

    Okie, Susan

    2005-01-01

    .... Library of Congress Cataloging-in-Publication Data Okie, Susan. Fed up! : winning the war against childhood obesity / Susan Okie. p. ; cm. Includes bibliographical references and index. ISBN 0-309-09310-4 (hardcover) 1. Obesity in children- United States. 2. Obesity in children- United States- Prevention. [DNLM: 1. Obesity- epidemiology- United ...

  8. The Sport League's Dilemma : Competitive Balance versus Incentives to Win

    NARCIS (Netherlands)

    Palomino, F.A.; Rigotti, L.

    2000-01-01

    We analyze a dynamic model of strategic interaction between a professional sport league that organizes a tournament, the teams competing to win it, and the broadcasters paying for the rights to televise it.Teams and broadcasters maximize expected profits, while the league's objective may be either

  9. Winning in straight sets helps in Grand Slam tennis

    NARCIS (Netherlands)

    Goossens, Dries R.; Kempeneers, Jurgen; Koning, Ruud H.; Spieksma, Frits C. R.

    2015-01-01

    In this contribution, we study whether fatigue resulting from the previous match affects a player's chances of winning his (or her) next match in Grand Slum tennis. We measure relative fatigue levels of two opponents by looking at the difference in number of sets played in their previous match. We

  10. Win, Women, and Money: Collegiate Athletics Today and Tomorrow.

    Science.gov (United States)

    Nyquist, Ewald B.

    1979-01-01

    Problems associated with collegiate athletics involve winning at any cost, accommodating women, and financing sports in an era of declining resources and rising costs. Abuses in athletics programs, presidential responsibility, research of the problems and its results, and predictions for the future are examined with regard to these issues. (JMD)

  11. Tight Focus on Instruction Wins Texas District Prize

    Science.gov (United States)

    Maxwell, Lesli A.

    2009-01-01

    It took a while for four-time finalist Aldine, Texas, to win the Broad Prize for Urban Education. But it took even longer to craft the system that ultimately put the district over the top. Educators in Aldine district have been working for more than a decade to refine their "managed instruction" system. Reviewers examined how the school…

  12. Are we winning? Improving perinatal outcomes at a deeply rural ...

    African Journals Online (AJOL)

    Are we winning? Improving perinatal outcomes at a deeply rural district hospital in South Africa. CB Gaunt. Abstract. No Abstract. Full Text: EMAIL FREE FULL TEXT EMAIL FREE FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT · http://dx.doi.org/10.7196/SAMJ.3699 · AJOL African Journals Online. HOW TO ...

  13. Performing to win unlocking the secrets of the arts for personal and business success

    CERN Document Server

    Powell, Mark

    2016-01-01

    This book explores and demonstrates the transformative learning experiences that organizations and their leaders can derive from the arts. It is through the arts that we have always explored our humanity: through dance and music; art and sculpture; theatre and poetry. The arts allow us to explore our own selves and our relationship to others and to the world around us. This central role of the arts is commonly accepted in everyday life, but the implications of this are not typically extended to the world of business. The authors argues strongly that, to the contrary, the methodologies and approaches that are fundamental to performing artists of all kinds can provide exactly the kind of inspirational, people-centred and performance-related techniques that are missing from much of the typically mechanistic, systems-based and process-driven training and development of managers and executives. Technical proficiency and expertise are not enough to deliver an award-winning result; what enables a truly outstanding p...

  14. On the equivalence of Hopfield networks and Boltzmann Machines.

    Science.gov (United States)

    Barra, Adriano; Bernacchia, Alberto; Santucci, Enrica; Contucci, Pierluigi

    2012-10-01

    A specific type of neural networks, the Restricted Boltzmann Machines (RBM), are implemented for classification and feature detection in machine learning. They are characterized by separate layers of visible and hidden units, which are able to learn efficiently a generative model of the observed data. We study a "hybrid" version of RBMs, in which hidden units are analog and visible units are binary, and we show that thermodynamics of visible units are equivalent to those of a Hopfield network, in which the N visible units are the neurons and the P hidden units are the learned patterns. We apply the method of stochastic stability to derive the thermodynamics of the model, by considering a formal extension of this technique to the case of multiple sets of stored patterns, which may act as a benchmark for the study of correlated sets. Our results imply that simulating the dynamics of a Hopfield network, requiring the update of N neurons and the storage of N(N-1)/2 synapses, can be accomplished by a hybrid Boltzmann Machine, requiring the update of N+P neurons but the storage of only NP synapses. In addition, the well known glass transition of the Hopfield network has a counterpart in the Boltzmann Machine: it corresponds to an optimum criterion for selecting the relative sizes of the hidden and visible layers, resolving the trade-off between flexibility and generality of the model. The low storage phase of the Hopfield model corresponds to few hidden units and hence a overly constrained RBM, while the spin-glass phase (too many hidden units) corresponds to unconstrained RBM prone to overfitting of the observed data. Copyright © 2012 Elsevier Ltd. All rights reserved.

  15. Lattice Boltzmann method for the fractional advection-diffusion equation.

    Science.gov (United States)

    Zhou, J G; Haygarth, P M; Withers, P J A; Macleod, C J A; Falloon, P D; Beven, K J; Ockenden, M C; Forber, K J; Hollaway, M J; Evans, R; Collins, A L; Hiscock, K M; Wearing, C; Kahana, R; Villamizar Velez, M L

    2016-04-01

    Mass transport, such as movement of phosphorus in soils and solutes in rivers, is a natural phenomenon and its study plays an important role in science and engineering. It is found that there are numerous practical diffusion phenomena that do not obey the classical advection-diffusion equation (ADE). Such diffusion is called abnormal or superdiffusion, and it is well described using a fractional advection-diffusion equation (FADE). The FADE finds a wide range of applications in various areas with great potential for studying complex mass transport in real hydrological systems. However, solution to the FADE is difficult, and the existing numerical methods are complicated and inefficient. In this study, a fresh lattice Boltzmann method is developed for solving the fractional advection-diffusion equation (LabFADE). The FADE is transformed into an equation similar to an advection-diffusion equation and solved using the lattice Boltzmann method. The LabFADE has all the advantages of the conventional lattice Boltzmann method and avoids a complex solution procedure, unlike other existing numerical methods. The method has been validated through simulations of several benchmark tests: a point-source diffusion, a boundary-value problem of steady diffusion, and an initial-boundary-value problem of unsteady diffusion with the coexistence of source and sink terms. In addition, by including the effects of the skewness β, the fractional order α, and the single relaxation time τ, the accuracy and convergence of the method have been assessed. The numerical predictions are compared with the analytical solutions, and they indicate that the method is second-order accurate. The method presented will allow the FADE to be more widely applied to complex mass transport problems in science and engineering.

  16. Lattice Boltzmann modeling and simulation of liquid jet breakup

    Science.gov (United States)

    Saito, Shimpei; Abe, Yutaka; Koyama, Kazuya

    2017-07-01

    A three-dimensional color-fluid lattice Boltzmann model for immiscible two-phase flows is developed in the framework of a three-dimensional 27-velocity (D3Q27) lattice. The collision operator comprises the D3Q27 versions of three suboperators: a multiple-relaxation-time (MRT) collision operator, a generalized Liu-Valocchi-Kang perturbation operator, and a Latva-Kokko-Rothman recoloring operator. A D3Q27 version of an enhanced equilibrium distribution function is also incorporated into this model to improve the Galilean invariance. Three types of numerical tests, namely, a static droplet, an oscillating droplet, and the Rayleigh-Taylor instability, show a good agreement with analytical solutions and numerical simulations. Following these numerical tests, this model is applied to liquid-jet-breakup simulations. The simulation conditions are matched to the conditions of the previous experiments. In this case, numerical stability is maintained throughout the simulation, although the kinematic viscosity for the continuous phase is set as low as 1.8 ×10-4 , in which case the corresponding Reynolds number is 3.4 ×103 ; the developed lattice Boltzmann model based on the D3Q27 lattice enables us to perform the simulation with parameters directly matched to the experiments. The jet's liquid column transitions from an asymmetrical to an axisymmetrical shape, and entrainment occurs from the side of the jet. The measured time history of the jet's leading-edge position shows a good agreement with the experiments. Finally, the reproducibility of the regime map for liquid-liquid systems is assessed. The present lattice Boltzmann simulations well reproduce the characteristics of predicted regimes, including varicose breakup, sinuous breakup, and atomization.

  17. Three-dimensional lattice Boltzmann model for compressible flows.

    Science.gov (United States)

    Sun, Chenghai; Hsu, Andrew T

    2003-07-01

    A three-dimensional compressible lattice Boltzmann model is formulated on a cubic lattice. A very large particle-velocity set is incorporated in order to enable a greater variation in the mean velocity. Meanwhile, the support set of the equilibrium distribution has only six directions. Therefore, this model can efficiently handle flows over a wide range of Mach numbers and capture shock waves. Due to the simple form of the equilibrium distribution, the fourth-order velocity tensors are not involved in the formulation. Unlike the standard lattice Boltzmann model, no special treatment is required for the homogeneity of fourth-order velocity tensors on square lattices. The Navier-Stokes equations were recovered, using the Chapman-Enskog method from the Bhatnagar-Gross-Krook (BGK) lattice Boltzmann equation. The second-order discretization error of the fluctuation velocity in the macroscopic conservation equation was eliminated by means of a modified collision invariant. The model is suitable for both viscous and inviscid compressible flows with or without shocks. Since the present scheme deals only with the equilibrium distribution that depends only on fluid density, velocity, and internal energy, boundary conditions on curved wall are easily implemented by an extrapolation of macroscopic variables. To verify the scheme for inviscid flows, we have successfully simulated a three-dimensional shock-wave propagation in a box and a normal shock of Mach number 10 over a wedge. As an application to viscous flows, we have simulated a flat plate boundary layer flow, flow over a cylinder, and a transonic flow over a NACA0012 airfoil cascade.

  18. Phase transitions in restricted Boltzmann machines with generic priors

    Science.gov (United States)

    Barra, Adriano; Genovese, Giuseppe; Sollich, Peter; Tantari, Daniele

    2017-10-01

    We study generalized restricted Boltzmann machines with generic priors for units and weights, interpolating between Boolean and Gaussian variables. We present a complete analysis of the replica symmetric phase diagram of these systems, which can be regarded as generalized Hopfield models. We underline the role of the retrieval phase for both inference and learning processes and we show that retrieval is robust for a large class of weight and unit priors, beyond the standard Hopfield scenario. Furthermore, we show how the paramagnetic phase boundary is directly related to the optimal size of the training set necessary for good generalization in a teacher-student scenario of unsupervised learning.

  19. Thrombosis modeling in intracranial aneurysms: a lattice Boltzmann numerical algorithm

    Science.gov (United States)

    Ouared, R.; Chopard, B.; Stahl, B.; Rüfenacht, D. A.; Yilmaz, H.; Courbebaisse, G.

    2008-07-01

    The lattice Boltzmann numerical method is applied to model blood flow (plasma and platelets) and clotting in intracranial aneurysms at a mesoscopic level. The dynamics of blood clotting (thrombosis) is governed by mechanical variations of shear stress near wall that influence platelets-wall interactions. Thrombosis starts and grows below a shear rate threshold, and stops above it. Within this assumption, it is possible to account qualitatively well for partial, full or no occlusion of the aneurysm, and to explain why spontaneous thrombosis is more likely to occur in giant aneurysms than in small or medium sized aneurysms.

  20. Lattice Boltzmann Modeling of Thrombosis in Giant Aneurysms

    Science.gov (United States)

    Chopard, B.; Ouared, R.; Ruefenacht, D. A.; Yilmaz, H.

    We propose a numerical model of blood flow and blood clotting whose purpose is to describe thrombus formation in cerebral aneurysms. We identify possible mechanisms that can cause occurence of spontaneous thrombosis in unruptured giant intracranial aneurysms. Our main claim is that, under normal conditions, there is a low shear rate threshold below which thrombosis starts and growths. This assumption is supported by several evidences from literature. The proposed mechanisms are incorporated into a Lattice Boltzmann (LB) model for blood flow and platelets adhesion and aggregation. Numerical simulations show that the low shear rate threshold assumption together with aneurysm geometry account well for the observations.

  1. Multi-component lattice-Boltzmann model with interparticle interaction

    CERN Document Server

    Shan, X; Shan, Xiaowen; Doolen, Gary

    1995-01-01

    Abstract: A previously proposed [X. Shan and H. Chen, Phys. Rev. E {\\bf 47}, 1815, (1993)] lattice Boltzmann model for simulating fluids with multiple components and interparticle forces is described in detail. Macroscopic equations governing the motion of each component are derived by using Chapman-Enskog method. The mutual diffusivity in a binary mixture is calculated analytically and confirmed by numerical simulation. The diffusivity is generally a function of the concentrations of the two components but independent of the fluid velocity so that the diffusion is Galilean invariant. The analytically calculated shear kinematic viscosity of this model is also confirmed numerically.

  2. Distributional Monte Carlo Methods for the Boltzmann Equation

    Science.gov (United States)

    2013-03-01

    real valued function over R3 such that ∫ R3 φ (v) Q ( f , f ) dv exists. Cercignani shows [29] ∫ R3 φ (v) Q ( f , f ) dv = 1 4 ∫ R3 ∫ R3 ∫ S + [ f ( v...1957. [26] Cercignani , C. “Existence and Uniqueness in the Large for Boundary Value Problems in Kinetic Theory”. Journal of Mathematical Physics, 8(8...1653–1656, 1967. [27] Cercignani , C. The Boltzmann Equation and Its Applications. Springer-Verlag, 1988. [28] Cercignani , C. Mathematical Methods in

  3. A large eddy lattice Boltzmann simulation of magnetohydrodynamic turbulence

    Science.gov (United States)

    Flint, Christopher; Vahala, George

    2018-02-01

    Large eddy simulations (LES) of a lattice Boltzmann magnetohydrodynamic (LB-MHD) model are performed for the unstable magnetized Kelvin-Helmholtz jet instability. This algorithm is an extension of Ansumali et al. [1] to MHD in which one performs first an expansion in the filter width on the kinetic equations followed by the usual low Knudsen number expansion. These two perturbation operations do not commute. Closure is achieved by invoking the physical constraint that subgrid effects occur at transport time scales. The simulations are in very good agreement with direct numerical simulations.

  4. Restricted Boltzmann machine learning for solving strongly correlated quantum systems

    Science.gov (United States)

    Nomura, Yusuke; Darmawan, Andrew S.; Yamaji, Youhei; Imada, Masatoshi

    2017-11-01

    We develop a machine learning method to construct accurate ground-state wave functions of strongly interacting and entangled quantum spin as well as fermionic models on lattices. A restricted Boltzmann machine algorithm in the form of an artificial neural network is combined with a conventional variational Monte Carlo method with pair product (geminal) wave functions and quantum number projections. The combination allows an application of the machine learning scheme to interacting fermionic systems. The combined method substantially improves the accuracy beyond that ever achieved by each method separately, in the Heisenberg as well as Hubbard models on square lattices, thus proving its power as a highly accurate quantum many-body solver.

  5. Jet propagation within a Linearized Boltzmann Transport model

    Energy Technology Data Exchange (ETDEWEB)

    Luo, Tan; He, Yayun [Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079 (China); Wang, Xin-Nian [Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China Normal University, Wuhan 430079 (China); Nuclear Science Division, Mailstop 70R0319, Lawrence Berkeley National Laboratory, Berkeley, CA 94740 (United States); Zhu, Yan [Departamento de Física de Partículas and IGFAE, Universidade de Santiago de Compostela, E-15706 Santiago de Compostela, Galicia (Spain)

    2014-12-15

    A Linearized Boltzmann Transport (LBT) model has been developed for the study of parton propagation inside quark–gluon plasma. Both leading and thermal recoiled partons are tracked in order to include the effect of jet-induced medium excitation. In this talk, we present a study within the LBT model in which we implement the complete set of elastic parton scattering processes. We investigate elastic parton energy loss and their energy and length dependence. We further investigate energy loss and transverse shape of reconstructed jets. Contributions from the recoiled thermal partons and jet-induced medium excitations are found to have significant influences on the jet energy loss and transverse profile.

  6. 32 CFR 22.610 - Award instruments.

    Science.gov (United States)

    2010-07-01

    ... 32 National Defense 1 2010-07-01 2010-07-01 false Award instruments. 22.610 Section 22.610 National Defense Department of Defense OFFICE OF THE SECRETARY OF DEFENSE DoD GRANT AND AGREEMENT REGULATIONS DoD GRANTS AND AGREEMENTS-AWARD AND ADMINISTRATION Award § 22.610 Award instruments. (a) Each...

  7. Climate Leadership Awards and Conference

    Science.gov (United States)

    The seventh annual Climate Leadership Awards Dinner will be held during the 2018 Climate Leadership Conference; the event publicly recognize individuals and organizations for their outstanding leadership in reducing greenhouse gas emissions.

  8. Climate Leadership Awards Frequent Questions

    Science.gov (United States)

    Provides answers to frequently asked questions regarding the Climate Leadership Awards, sponsored by EPA's Center for Corporate Climate Leadership with co-sponsorship from the Center for Climate and Energy Solutions and The Climate Registry.

  9. 2002 Institute of Physics awards

    CERN Multimedia

    2001-01-01

    The IOP Rutherford Medal and prize was awarded to P Dornan, W Venus and D Plane for their major contributions to the detectors and leadership of the LEP, ALEPH, OPAL and DELPHI experiments (4 paragraphs).

  10. Plascore receives awards from CERN

    CERN Multimedia

    2002-01-01

    Plascore recently was awarded two honors from CERN, European High Energy Physics Lab, for its involvement in the manufacture of Thermoplastic Honeycomb panels for their large superconducting super collider (1/2 page).

  11. Institute of Physics Awards 2002

    CERN Document Server

    2002-01-01

    The IOP Physics Awards for 2002 include: Prof. M Lockwood, Univ. Southhampton and Rutherford Laboratory, Charles Chree Medal and Prize; Dr. S Myers, CERN, Duddell Medal and Prize; Dr S Langridge, Rutherford Laboratory, Charles Vernon Boys Medal and Prize.

  12. Adjoint Parameter Sensitivity Analysis for the Hydrodynamic Lattice Boltzmann Method with Applications to Design Optimization

    DEFF Research Database (Denmark)

    Pingen, Georg; Evgrafov, Anton; Maute, Kurt

    2009-01-01

    We present an adjoint parameter sensitivity analysis formulation and solution strategy for the lattice Boltzmann method (LBM). The focus is on design optimization applications, in particular topology optimization. The lattice Boltzmann method is briefly described with an in-depth discussion of so...

  13. Exact solutions to the Boltzmann equation by mapping the scattering integral into a differential operator

    Energy Technology Data Exchange (ETDEWEB)

    Zabadal, Jorge; Borges, Volnei; Van der Laan, Flavio T., E-mail: jorge.zabadal@ufrgs.br, E-mail: borges@ufrgs.br, E-mail: ftvdl@ufrgs.br [Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, RS (Brazil). Departamento de Engenharia Mecanica. Grupo de Pesquisas Radiologicas; Ribeiro, Vinicius G., E-mail: vinicius_ribeiro@uniritter.edu.br [Centro Universitario Ritter dos Reis (UNIRITTER), Porto Alegre, RS (Brazil); Santos, Marcio G., E-mail: phd.marcio@gmail.com [Universidade Federal do Rio Grande do Sul (UFRGS), Tramandai, RS (Brazil). Departamento Interdisciplinar do Campus Litoral Norte

    2015-07-01

    This work presents a new analytical method for solving the Boltzmann equation. In this formulation, a linear differential operator is applied over the Boltzmann model, in order to produce a partial differential equation in which the scattering term is absent. This auxiliary equation is solved via reduction of order. The exact solution obtained is employed to define a precursor for the buildup factor. (author)

  14. Molecules Best Paper Award 2013

    Directory of Open Access Journals (Sweden)

    Derek J. McPhee

    2013-02-01

    Full Text Available Molecules has started to institute a "Best Paper" award to recognize the most outstanding papers in the area of natural products, medicinal chemistry and molecular diversity published in Molecules. We are pleased to announce the second "Molecules Best Paper Award" for 2013. Candidates were chosen by the Editor-in-Chief and selected editorial board members from among all the papers published in 2009.

  15. Avoiding Boltzmann Brain domination in holographic dark energy models

    Science.gov (United States)

    Horvat, R.

    2015-11-01

    In a spatially infinite and eternal universe approaching ultimately a de Sitter (or quasi-de Sitter) regime, structure can form by thermal fluctuations as such a space is thermal. The models of Dark Energy invoking holographic principle fit naturally into such a category, and spontaneous formation of isolated brains in otherwise empty space seems the most perplexing, creating the paradox of Boltzmann Brains (BB). It is thus appropriate to ask if such models can be made free from domination by Boltzmann Brains. Here we consider only the simplest model, but adopt both the local and the global viewpoint in the description of the Universe. In the former case, we find that if a dimensionless model parameter c, which modulates the Dark Energy density, lies outside the exponentially narrow strip around the most natural c = 1 line, the theory is rendered BB-safe. In the latter case, the bound on c is exponentially stronger, and seemingly at odds with those bounds on c obtained from various observational tests.

  16. Polyelectrolyte Microcapsules: Ion Distributions from a Poisson-Boltzmann Model

    Science.gov (United States)

    Tang, Qiyun; Denton, Alan R.; Rozairo, Damith; Croll, Andrew B.

    2014-03-01

    Recent experiments have shown that polystyrene-polyacrylic-acid-polystyrene (PS-PAA-PS) triblock copolymers in a solvent mixture of water and toluene can self-assemble into spherical microcapsules. Suspended in water, the microcapsules have a toluene core surrounded by an elastomer triblock shell. The longer, hydrophilic PAA blocks remain near the outer surface of the shell, becoming charged through dissociation of OH functional groups in water, while the shorter, hydrophobic PS blocks form a networked (glass or gel) structure. Within a mean-field Poisson-Boltzmann theory, we model these polyelectrolyte microcapsules as spherical charged shells, assuming different dielectric constants inside and outside the capsule. By numerically solving the nonlinear Poisson-Boltzmann equation, we calculate the radial distribution of anions and cations and the osmotic pressure within the shell as a function of salt concentration. Our predictions, which can be tested by comparison with experiments, may guide the design of microcapsules for practical applications, such as drug delivery. This work was supported by the National Science Foundation under Grant No. DMR-1106331.

  17. Lattice Boltzmann simulation of flow around a confined circular cyclinder

    Energy Technology Data Exchange (ETDEWEB)

    Ashrafizaadeh, M.; Zadehgol, A. [Isfahan Univ. of Technology , Mechanical Engineering, Isfahan (Iran, Islamic Republic of)]. E-mail: mahmud@cc.iut.ac.ir

    2002-07-01

    A two dimensional lattice Boltzmann model (LBM) based on a single time relaxation BGK model has been developed. Several benchmark problems including the Poiseuille flow, the lid driven cavity flow and the flow around a circular cylinder have been performed employing a d2q9 lattice. The laminar flow around a circular cylinder within a channel has been extensively investigated using the present lattice Boltzmann model. Both symmetric and asymmetric placement configurations of the circular cylinder within the channel have been considered. A new treatment for the outlet velocity and pressure (density) boundary conditions has been proposed and validated. The present LBM results are in excellent agreement with those of the other existing CFD results. Careful examination of the LBM results and an appropriate calculation of the lift coefficient based on the rectangular lattice representation of the circular cylinder reveals that the periodic oscillation of the lift coefficient has a second harmonic when the cylinder is placed asymmetrically within the channel. The second harmonic could be associated with an asymmetrical shedding pattern of the vortices behind the cylinder from the upper and lower sides of the cylinder. (author)

  18. Moving charged particles in lattice Boltzmann-based electrokinetics

    Science.gov (United States)

    Kuron, Michael; Rempfer, Georg; Schornbaum, Florian; Bauer, Martin; Godenschwager, Christian; Holm, Christian; de Graaf, Joost

    2016-12-01

    The motion of ionic solutes and charged particles under the influence of an electric field and the ensuing hydrodynamic flow of the underlying solvent is ubiquitous in aqueous colloidal suspensions. The physics of such systems is described by a coupled set of differential equations, along with boundary conditions, collectively referred to as the electrokinetic equations. Capuani et al. [J. Chem. Phys. 121, 973 (2004)] introduced a lattice-based method for solving this system of equations, which builds upon the lattice Boltzmann algorithm for the simulation of hydrodynamic flow and exploits computational locality. However, thus far, a description of how to incorporate moving boundary conditions into the Capuani scheme has been lacking. Moving boundary conditions are needed to simulate multiple arbitrarily moving colloids. In this paper, we detail how to introduce such a particle coupling scheme, based on an analogue to the moving boundary method for the pure lattice Boltzmann solver. The key ingredients in our method are mass and charge conservation for the solute species and a partial-volume smoothing of the solute fluxes to minimize discretization artifacts. We demonstrate our algorithm's effectiveness by simulating the electrophoresis of charged spheres in an external field; for a single sphere we compare to the equivalent electro-osmotic (co-moving) problem. Our method's efficiency and ease of implementation should prove beneficial to future simulations of the dynamics in a wide range of complex nanoscopic and colloidal systems that were previously inaccessible to lattice-based continuum algorithms.

  19. A Study of the Boltzmann Sequence-Structure Channel.

    Science.gov (United States)

    Magner, Abram; Kihara, Daisuke; Szpankowski, Wojciech

    2017-02-01

    We rigorously study a channel that maps sequences from a finite alphabet to self-avoiding walks in the two-dimensional grid, inspired by a model of protein folding from statistical physics and studied empirically by biophysicists. This channel, which we call the Boltzmann sequence-structure channel, is characterized by a Boltzmann/Gibbs distribution with a free parameter corresponding to temperature. In our previous work, we verified empirically that the channel capacity appears to have a phase transition for small temperature and decays to zero for high temperature. In this paper, we make some progress toward theoretically explaining these phenomena. We first estimate the conditional entropy between the input sequence and the output fold, giving an upper bound which exhibits a phase transition with respect to temperature. Next, we formulate a class of parameter settings under which the dependence between walk energies is governed by their number of shared contacts. In this setting, we derive a lower bound on the conditional entropy. This lower bound allows us to conclude that the mutual information tends to zero in a nontrivial regime of high temperature, giving some support to the empirical fact regarding capacity. Finally, we construct an example setting of the parameters of the model for which the conditional entropy is exactly calculable and which does not exhibit a phase transition.

  20. Detection of Hypertension Retinopathy Using Deep Learning and Boltzmann Machines

    Science.gov (United States)

    Triwijoyo, B. K.; Pradipto, Y. D.

    2017-01-01

    hypertensive retinopathy (HR) in the retina of the eye is disturbance caused by high blood pressure disease, where there is a systemic change of arterial in the blood vessels of the retina. Most heart attacks occur in patients caused by high blood pressure symptoms of undiagnosed. Hypertensive retinopathy Symptoms such as arteriolar narrowing, retinal haemorrhage and cotton wool spots. Based on this reasons, the early diagnosis of the symptoms of hypertensive retinopathy is very urgent to aim the prevention and treatment more accurate. This research aims to develop a system for early detection of hypertension retinopathy stage. The proposed method is to determine the combined features artery and vein diameter ratio (AVR) as well as changes position with Optic Disk (OD) in retinal images to review the classification of hypertensive retinopathy using Deep Neural Networks (DNN) and Boltzmann Machines approach. We choose this approach of because based on previous research DNN models were more accurate in the image pattern recognition, whereas Boltzmann machines selected because It requires speedy iteration in the process of learning neural network. The expected results from this research are designed a prototype system early detection of hypertensive retinopathy stage and analysed the effectiveness and accuracy of the proposed methods.

  1. Element Free Lattice Boltzmann Method for Fluid-Flow Problems

    Energy Technology Data Exchange (ETDEWEB)

    Jo, Jong Chull; Roh, Kyung Wan; Yune, Young Gill; Kim, Hho Jhung [Korea Institute of Nuclear Safety, Daejeon (Korea, Republic of); Kwon, Young Kwon [US Naval Postgraduate School, New York (United States)

    2007-10-15

    The Lattice Boltzmann Method (LBM) has been developed for application to thermal-fluid problems. Most of the those studies considered a regular shape of lattice or mesh like square and cubic grids. In order to apply the LBM to more practical cases, it is necessary to be able to solve complex or irregular shapes of problem domains. Some techniques were based on the finite element method. Generally, the finite element method is very powerful for solving two or three-dimensional complex or irregular shapes of domains using the iso-parametric element formulation which is based on a mathematical mapping from a regular shape of element in an imaginary domain to a more general and irregular shape of element in the physical domain. In addition, the element free technique is also quite useful to analyze a complex shape of domain because there is no need to divide a domain by a compatible finite element mesh. This paper presents a new finite element and element free formulations for the lattice Boltzmann equation using the general weighted residual technique. Then, a series of validation examples are presented.

  2. Avoiding Boltzmann Brain domination in holographic dark energy models

    Directory of Open Access Journals (Sweden)

    R. Horvat

    2015-11-01

    Full Text Available In a spatially infinite and eternal universe approaching ultimately a de Sitter (or quasi-de Sitter regime, structure can form by thermal fluctuations as such a space is thermal. The models of Dark Energy invoking holographic principle fit naturally into such a category, and spontaneous formation of isolated brains in otherwise empty space seems the most perplexing, creating the paradox of Boltzmann Brains (BB. It is thus appropriate to ask if such models can be made free from domination by Boltzmann Brains. Here we consider only the simplest model, but adopt both the local and the global viewpoint in the description of the Universe. In the former case, we find that if a dimensionless model parameter c, which modulates the Dark Energy density, lies outside the exponentially narrow strip around the most natural c=1 line, the theory is rendered BB-safe. In the latter case, the bound on c is exponentially stronger, and seemingly at odds with those bounds on c obtained from various observational tests.

  3. Outstanding student paper awards

    Science.gov (United States)

    The Hydrology Section presented five outstanding student paper awards at the 1999 Spring Meeting in Boston, Massachusetts, last June.Maneesha Joshi presented a poster titled “Estimation of the Extent and Duration of Melt on the Greenland Ice Sheet using an Edge Detection Technique on Passive Microwave Data.” She received her B.Tech. in civil engineering from the Indian Institute of Technology, Bombay in 1991, and a M.S. in environmental engineering from State University of New York, Buffalo in 1994. Maneesha expects to complete her Ph.D. in civil engineering (remote sensing) in September 1999, under the supervision of Carolyn Merry (Department of Civil and Environmental Engineering & Geodetic Science), Ken Jezek, and John Bolzan (Byrd Polar Research Center) at the Ohio State University, Columbus, Ohio. Her thesis focuses on estimating the extent of melt, melt season, and duration, and absorbed radiation on the Greenland ice sheet from passive microwave and SAR data. Maneesha's other interests include image processing, issues related to global climate change, and photogrammetry.

  4. CERN apprentice receives award

    CERN Multimedia

    2008-01-01

    Another CERN apprentice has received an award for the quality of his work. Stéphane Küng (centre), at the UIG ceremony last November, presided over by Geneva State Councillor Pierre-François Unger, Head of the Department of Economics and Health. Electronics technician Stéphane Küng was honoured in November by the Social Foundation of the Union Industrielle Genevoise (UIG) as one of Geneva’s eight best apprentices in the field of mechatronics. The 20-year-old Genevan obtained his Federal apprentice’s certificate (Certificat fédéral de capacité - CFC) in June 2007, achieving excellent marks in his written tests at the Centre d’Enseignement Professionnel Technique et Artisanal (CEPTA). Like more than 200 youngsters before him, Stéphane Küng spent part of his four-year sandwich course working at CERN, where he followed many practical training courses and gained valuable hands-on experience in various technical groups and labs. "It’ always very gr...

  5. EDITORIAL: MST Best Paper Award for 2004

    Science.gov (United States)

    Gill, Patrick

    2005-12-01

    For the last 13 years, Measurement Science and Technology has awarded a Best Paper prize. The Editorial Board of the journal believes that such a prize is an opportunity to thank authors for submitting their work, and serves as an integral part of the on-going quality review of the journal. An Editorial Board working party, comprising Patrick Gill (Chairman), David Birch and Ralph Tatam undertook the task of selecting as Best Paper 2004 a single contributed paper describing new and significant work, well aligned with the measurement scope of the journal, and presented in clear and rigorous form. They received a number of recommendations from the Editorial and International Advisory Board Members, and they would like to record their thanks to the Members for these recommendations, as they form an all-important first stage in the assessment process. There were responses from some five Board Members. In total, there were 16 papers nominated, plus another six from the working party. All these papers had quality ratings of 2 or higher from the referees, and note was also taken of the total electronic accesses for those papers subsequently short-listed. Review Articles, and papers that included a Board Member as an author, were automatically excluded. From the submitted nominations and working party deliberations, a short list of two papers was drawn up. The winning paper was then selected on the totality of criteria. Thus the paper recommended by the working party for the MST Best Paper Award for 2004 is: 'Adsorptive pressure-sensitive coatings on porous anodised aluminium' by Masaharu Kameda, Norikazu Tezuka, Tomohiro Hangai, Keisuke Asai, Kazuyuki Nakakita and Yutaka Amao, 15 489-500 (2004) This paper describes a novel pressure sensor based on a luminescent coating applied to a porous anodized aluminium layer, with application to the measurement of fluctuating pressures on short timescales with high spatial resolution. The research has particular application to

  6. Formats of Winning Strategies for Six Types of Pushdown Games

    Directory of Open Access Journals (Sweden)

    Wladimir Fridman

    2010-06-01

    Full Text Available The solution of parity games over pushdown graphs (Walukiewicz '96 was the first step towards an effective theory of infinite-state games. It was shown that winning strategies for pushdown games can be implemented again as pushdown automata. We continue this study and investigate the connection between game presentations and winning strategies in altogether six cases of game arenas, among them realtime pushdown systems, visibly pushdown systems, and counter systems. In four cases we show by a uniform proof method that we obtain strategies implementable by the same type of pushdown machine as given in the game arena. We prove that for the two remaining cases this correspondence fails. In the conclusion we address the question of an abstract criterion that explains the results.

  7. Optimizing Distribution Problems using WinQSB Software

    Directory of Open Access Journals (Sweden)

    Daniel Mihai Amariei

    2015-07-01

    Full Text Available In the present paper we are presenting a problem of distribution using the Network Modeling Module of the WinQSB software, were we have 5 athletes which we must assign the optimal sample, function of the obtained time, so as to obtain the maximum output of the athletes. Also we analyzed the case of an accident of 2 athletes, the coupling of 3 athletes with 5 various athletic events causing the maximum coupling, done using the Hungarian algorithm.

  8. Winning end users active support to demand side response

    Energy Technology Data Exchange (ETDEWEB)

    Osorio, Jose [Rede Electrica Nacional, S.A., Lisbon (Portugal); Estanqueiro, Ana [Laboratorio Nacional de Energia e Geologia (LNEG), Lisbon (Portugal)

    2012-07-01

    While objectives proposed for Smart Grids and Smart metering may seem to be able to win easily end user's supports, a considerable amount of studies on social behavior concerning energy efficiency and sustainability show the gap between the values people would like to fulfill and their real life performance. As TSOs envision here a source of System Ancillary Services, measures to make the source really dependable, so that an adequate market design may really work are pointed out. (orig.)

  9. Defeating ISIS by Winning the War of Ideas

    Science.gov (United States)

    2017-03-17

    important state builders, experience deep and meaningful belonging and sisterhood, to live an exciting adventure in which they can find true romance, as...backfire if conducted by individuals without a deep understanding of the differences between each radical jihadist group and their leaders. Defeating...ISIS by Winning the War of Ideas 20 A third effort is Central Command’s Web Ops anti-ISIS campaign or military information support operations. In

  10. Are We Winning? A Brief History of Military Operations Assessment

    Science.gov (United States)

    2014-09-01

    Soviet numerical advantage at the tactical level, Active Defense essentially came down to preparations to “fight to win a draw.” CNA analyst Douglas ...28. Douglas W. Skinner, Airland Battle Doctrine, CNA Professional Paper 463 (1988), p. 9. 29. Ibid., p. 1. 30. For a detailed look at AirLand... Lambert , "Measuring the Success of the Nato Operation in Bosnia & Herzegovina 1995-2000," in 17th European Conference on Operations Research (Budapest

  11. An elementary introduction to Bayesian computing using WinBUGS.

    Science.gov (United States)

    Fryback, D G; Stout, N K; Rosenberg, M A

    2001-01-01

    Bayesian statistics provides effective techniques for analyzing data and translating the results to inform decision making. This paper provides an elementary tutorial overview of the WinBUGS software for performing Bayesian statistical analysis. Background information on the computational methods used by the software is provided. Two examples drawn from the field of medical decision making are presented to illustrate the features and functionality of the software.

  12. Lattice Boltzmann equation method for multiple immiscible continuum fluids

    Science.gov (United States)

    Spencer, T. J.; Halliday, I.; Care, C. M.

    2010-12-01

    This paper generalizes the two-component algorithm of Sec. , extending it, in Sec. , to describe N>2 mutually immiscible fluids in the isothermal continuum regime. Each fluid has an independent interfacial tension. While retaining all its computational advantages, we remove entirely the empiricism associated with contact behavior in our previous multiple immiscible fluid models [M. M. Dupin , Phys. Rev. E 73, 055701(R) (2006)10.1103/PhysRevE.73.055701; Med. Eng. Phys. 28, 13 (2006)10.1016/j.medengphy.2005.04.015] while solidifying the physical foundations. Moreover, the model relies upon a fluid-fluid segregation which is simpler, computationally faster, more free of artifacts (i.e., the interfacial microcurrent), and upon an interface-inducing force distribution which is analytic. The method is completely symmetric between any numbers of immiscible fluids and stable over a wide range of directly input interfacial tension. We present data on the steady-state properties of multiple interface model, which are in good agreement with theory [R. E. Johnson and S. S. Sadhal, Annu. Rev. Fluid Mech. 17, 289 (1985)10.1146/annurev.fl.17.010185.001445], specifically on the shapes of multidrop systems. Section is an analysis of the kinetic and continuum-scale descriptions of the underlying two-component lattice Boltzmann model for immiscible fluids, extendable to more than two immiscible fluids. This extension requires (i) the use of a more local kinetic equation perturbation which is (ii) free from a reliance on measured interfacial curvature. It should be noted that viewed simply as a two-component method, the continuum algorithm is inferior to our previous methods, reported by Lishchuk [Phys. Rev. E 67, 036701 (2003)]10.1103/PhysRevE.76.036701 and Halliday [Phys. Rev. E 76, 026708 (2007)]10.1103/PhysRevE.76.026708. Greater stability and parameter range is achieved in multiple drop simulations by using the forced multi-relaxation-time lattice Boltzmann method developed

  13. The peeling process of infinite Boltzmann planar maps

    DEFF Research Database (Denmark)

    Budd, Timothy George

    2016-01-01

    We start by studying a peeling process on finite random planar maps with faces of arbitrary degrees determined by a general weight sequence, which satisfies an admissibility criterion. The corresponding perimeter process is identified as a biased random walk, in terms of which the admissibility...... criterion has a very simple interpretation. The finite random planar maps under consideration were recently proved to possess a well-defined local limit known as the infinite Boltzmann planar map (IBPM). Inspired by recent work of Curien and Le Gall, we show that the peeling process on the IBPM can...... be obtained from the peeling process of finite random maps by conditioning the perimeter process to stay positive. The simplicity of the resulting description of the peeling process allows us to obtain the scaling limit of the associated perimeter and volume process for arbitrary regular critical weight...

  14. Approximate Message Passing with Restricted Boltzmann Machine Priors

    CERN Document Server

    Tramel, Eric W; Krzakala, Florent

    2015-01-01

    Approximate Message Passing (AMP) has been shown to be an excellent statistical approach to signal inference and compressed sensing problem. The AMP framework provides modularity in the choice of signal prior; here we propose a hierarchical form of the Gauss-Bernouilli prior which utilizes a Restricted Boltzmann Machine (RBM) trained on the signal support to push reconstruction performance beyond that of simple iid priors for signals whose support can be well represented by a trained binary RBM. We present and analyze two methods of RBM factorization and demonstrate how these affect signal reconstruction performance within our proposed algorithm. Finally, using the MNIST handwritten digit dataset, we show experimentally that using an RBM allows AMP to approach oracle-support performance.

  15. Lattice Boltzmann Simulation of Multiple Bubbles Motion under Gravity

    Directory of Open Access Journals (Sweden)

    Deming Nie

    2015-01-01

    Full Text Available The motion of multiple bubbles under gravity in two dimensions is numerically studied through the lattice Boltzmann method for the Eotvos number ranging from 1 to 12. Two kinds of initial arrangement are taken into account: vertical and horizontal arrangement. In both cases the effects of Eotvos number on the bubble coalescence and rising velocity are investigated. For the vertical arrangement, it has been found that the coalescence pattern is similar. The first coalescence always takes place between the two uppermost bubbles. And the last coalescence always takes place between the coalesced bubble and the bottommost bubble. For four bubbles in a horizontal arrangement, the outermost bubbles travel into the wake of the middle bubbles in all cases, which allows the bubbles to coalesce. The coalescence pattern is more complex for the case of eight bubbles, which strongly depends on the Eotvos number.

  16. Lattice Boltzmann modeling an introduction for geoscientists and engineers

    CERN Document Server

    Sukop, Michael C

    2005-01-01

    Lattice Boltzmann models have a remarkable ability to simulate single- and multi-phase fluids and transport processes within them. A rich variety of behaviors, including higher Reynolds numbers flows, phase separation, evaporation, condensation, cavitation, buoyancy, and interactions with surfaces can readily be simulated. This book provides a basic introduction that emphasizes intuition and simplistic conceptualization of processes. It avoids the more difficult mathematics that underlies LB models. The model is viewed from a particle perspective where collisions, streaming, and particle-particle/particle-surface interactions constitute the entire conceptual framework. Beginners and those with more interest in model application than detailed mathematical foundations will find this a powerful "quick start" guide. Example simulations, exercises, and computer codes are included. Working code is provided on the Internet.

  17. Lattice Boltzmann model for melting with natural convection

    Energy Technology Data Exchange (ETDEWEB)

    Huber, Christian [Department of Earth and Planetary Science, University of California - Berkeley, 307 McCone Hall 4767, Berkeley, CA 94720-4767 (United States)], E-mail: chuber@seismo.berkeley.edu; Parmigiani, Andrea [Computer Science Department, University of Geneva, 24, Rue du General Dufour, 1211 Geneva 4 (Switzerland)], E-mail: andrea.parmigiani@terre.unige.ch; Chopard, Bastien [Computer Science Department, University of Geneva, 24, Rue du General Dufour, 1211 Geneva 4 (Switzerland)], E-mail: Bastien.Chopard@cui.unige.ch; Manga, Michael [Department of Earth and Planetary Science, University of California - Berkeley, 177 McCone Hall 4767, Berkeley, CA 94720-4767 (United States)], E-mail: manga@seismo.berkeley.edu; Bachmann, Olivier [Department of Earth and Space Science, University of Washington, Johnson Hall 070, Seattle WA 98195-1310 (United States)], E-mail: bachmano@u.washington.edu

    2008-10-15

    We develop a lattice Boltzmann method to couple thermal convection and pure-substance melting. The transition from conduction-dominated heat transfer to fully-developed convection is analyzed and scaling laws and previous numerical results are reproduced by our numerical method. We also investigate the limit in which thermal inertia (high Stefan number) cannot be neglected. We use our results to extend the scaling relations obtained at low Stefan number and establish the correlation between the melting front propagation and the Stefan number for fully-developed convection. We conclude by showing that the model presented here is particularly well-suited to study convection melting in geometrically complex media with many applications in geosciences.

  18. Poisson-Boltzmann Calculations: van der Waals or Molecular Surface?

    Science.gov (United States)

    Pang, Xiaodong; Zhou, Huan-Xiang

    2012-01-01

    The Poisson-Boltzmann equation is widely used for modeling the electrostatics of biomolecules, but the calculation results are sensitive to the choice of the boundary between the low solute dielectric and the high solvent dielectric. The default choice for the dielectric boundary has been the molecular surface, but the use of the van der Waals surface has also been advocated. Here we review recent studies in which the two choices are tested against experimental results and explicit-solvent calculations. The assignment of the solvent high dielectric constant to interstitial voids in the solute is often used as a criticism against the van der Waals surface. However, this assignment may not be as unrealistic as previously thought, since hydrogen exchange and other NMR experiments have firmly established that all interior parts of proteins are transiently accessible to the solvent. PMID:23293674

  19. Emergence of Compositional Representations in Restricted Boltzmann Machines

    Science.gov (United States)

    Tubiana, J.; Monasson, R.

    2017-03-01

    Extracting automatically the complex set of features composing real high-dimensional data is crucial for achieving high performance in machine-learning tasks. Restricted Boltzmann machines (RBM) are empirically known to be efficient for this purpose, and to be able to generate distributed and graded representations of the data. We characterize the structural conditions (sparsity of the weights, low effective temperature, nonlinearities in the activation functions of hidden units, and adaptation of fields maintaining the activity in the visible layer) allowing RBM to operate in such a compositional phase. Evidence is provided by the replica analysis of an adequate statistical ensemble of random RBMs and by RBM trained on the handwritten digits data set MNIST.

  20. Boundary slip from the immersed boundary lattice Boltzmann models.

    Science.gov (United States)

    Le, Guigao; Zhang, Junfeng

    2009-02-01

    We report an interesting and important observation of the velocity fields from immersed boundary lattice Boltzmann methods (IB-LBM). The computed velocity profiles can deviate from theoretical predictions greatly even for very simple flow situations, both in the immersed boundary layer and the bulk region. A rigorous analysis of the IB-LBM simulated velocity for a symmetric shear flow is carried out, and the analytical solutions indicate a strong dependence of velocity on the relaxation parameter (kinetic viscosity). Also our simulations demonstrate that simply increasing the immersed boundary layer thickness is not an efficient approach to reduce such velocity discrepancy. We hope this work will bring the awareness of this essential issue to people using IB-LBM for various flow situations.

  1. Using an Interactive Lattice Boltzmann Solver in Fluid Mechanics Instruction

    Directory of Open Access Journals (Sweden)

    Mirjam S. Glessmer

    2017-07-01

    Full Text Available This article gives an overview of the diverse range of teaching applications that can be realized using an interactive lattice Boltzmann simulation tool in fluid mechanics instruction and outreach. In an inquiry-based learning framework, examples are given of learning scenarios that address instruction on scientific results, scientific methods or the scientific process at varying levels of student activity, from consuming to applying to researching. Interactive live demonstrations on portable hardware enable new and innovative teaching concepts for fluid mechanics, also for large audiences and in the early stages of the university education. Moreover, selected examples successfully demonstrate that the integration of high-fidelity CFD methods into fluid mechanics teaching facilitates high-quality student research work within reach of the current state of the art in the respective field of research.

  2. Ionic size effects on the Poisson-Boltzmann theory.

    Science.gov (United States)

    Colla, Thiago; Nunes Lopes, Lucas; Dos Santos, Alexandre P

    2017-07-07

    In this paper, we develop a simple theory to study the effects of ionic size on ionic distributions around a charged spherical particle. We include a correction to the regular Poisson-Boltzmann equation in order to take into account the size of ions in a mean-field regime. The results are compared with Monte Carlo simulations and a density functional theory based on the fundamental measure approach and a second-order bulk expansion which accounts for electrostatic correlations. The agreement is very good even for multivalent ions. Our results show that the theory can be applied with very good accuracy in the description of ions with highly effective ionic radii and low concentration, interacting with a colloid or a nanoparticle in an electrolyte solution.

  3. Emergence of Compositional Representations in Restricted Boltzmann Machines.

    Science.gov (United States)

    Tubiana, J; Monasson, R

    2017-03-31

    Extracting automatically the complex set of features composing real high-dimensional data is crucial for achieving high performance in machine-learning tasks. Restricted Boltzmann machines (RBM) are empirically known to be efficient for this purpose, and to be able to generate distributed and graded representations of the data. We characterize the structural conditions (sparsity of the weights, low effective temperature, nonlinearities in the activation functions of hidden units, and adaptation of fields maintaining the activity in the visible layer) allowing RBM to operate in such a compositional phase. Evidence is provided by the replica analysis of an adequate statistical ensemble of random RBMs and by RBM trained on the handwritten digits data set MNIST.

  4. Chemical-potential-based lattice Boltzmann method for nonideal fluids

    Science.gov (United States)

    Wen, Binghai; Zhou, Xuan; He, Bing; Zhang, Chaoying; Fang, Haiping

    2017-06-01

    Chemical potential, as an important thermodynamic quantity, has been popularly used in thermodynamic modeling for complex systems, especially for those involving the phase transitions and chemical reactions. Here we present a chemical-potential-based multiphase lattice Boltzmann model, in which the nonideal force is directly evaluated by a chemical potential. The numerical computation is more efficient than the pressure-tensor-based model [Wen et al. Europhys. Lett. 112, 44002 (2015), 10.1209/0295-5075/112/44002] because the calculations of the pressure tensor and its divergence are avoided. We have derived several chemical potentials of the popular equations of state from the free-energy density function. The theoretical analyses and numerical results support that the present model satisfies thermodynamics and Galilean invariance. An effective chemical-potential boundary condition is also implemented to investigate the wettability of a solid surface, and the contact angle can be linearly tuned by the surface chemical potential.

  5. Determination of the Boltzmann Constant Using the Differential - Cylindrical Procedure

    CERN Document Server

    Feng, X J; Lin, H; Gillis, K A; Moldover, M R

    2015-01-01

    We report in this paper the progresses on the determination of the Boltzmann constant using the acoustic gas thermometer (AGT) of fixed-length cylindrical cavities. First, we present the comparison of the molar masses of pure argon gases through comparing speeds of sound of gases. The procedure is independent from the methodology by Gas Chromatography-Mass Spectrometry (GC-MS). The experimental results show good agreement between both methods. The comparison offers an independent inspection of the analytical results by GC-MS. Second, we present the principle of the novel differential-cylindrical procedure based on the AGT of two fixed-length cavities. The deletion mechanism for some major perturbations is analyzed for the new procedure. The experimental results of the differential-cylindrical procedure demonstrate some major improvements on the first, second acoustic and third virial coefficients, and the excess half-widths. The three acoustic virial coefficients agree well with the stated-of-the-art experime...

  6. Simulating condensation on microstructured surfaces using Lattice Boltzmann Method

    Science.gov (United States)

    Alexeev, Alexander; Vasyliv, Yaroslav

    2017-11-01

    We simulate a single component fluid condensing on 2D structured surfaces with different wettability. To simulate the two phase fluid, we use the athermal Lattice Boltzmann Method (LBM) driven by a pseudopotential force. The pseudopotential force results in a non-ideal equation of state (EOS) which permits liquid-vapor phase change. To account for thermal effects, the athermal LBM is coupled to a finite volume discretization of the temperature evolution equation obtained using a thermal energy rate balance for the specific internal energy. We use the developed model to probe the effect of surface structure and surface wettability on the condensation rate in order to identify microstructure topographies promoting condensation. Financial support is acknowledged from Kimberly-Clark.

  7. Lattice Boltzmann simulations of convection heat transfer in porous media

    Science.gov (United States)

    Liu, Qing; He, Ya-Ling

    2017-01-01

    A non-orthogonal multiple-relaxation-time (MRT) lattice Boltzmann (LB) method is developed to study convection heat transfer in porous media at the representative elementary volume scale based on the generalized non-Darcy model. In the method, two different LB models are constructed: one is constructed in the framework of the double-distribution-function approach, and the other is constructed in the framework of the hybrid approach. In particular, the transformation matrices used in the MRT-LB models are non-orthogonal matrices. The present method is applied to study mixed convection flow in a porous channel and natural convection flow in a porous cavity. It is found that the numerical results are in good agreement with the analytical solutions and/or other results reported in previous studies. Furthermore, the non-orthogonal MRT-LB method shows better numerical stability in comparison with the BGK-LB method.

  8. Consistent forcing scheme in the cascaded lattice Boltzmann method

    Science.gov (United States)

    Fei, Linlin; Luo, Kai Hong

    2017-11-01

    In this paper, we give an alternative derivation for the cascaded lattice Boltzmann method (CLBM) within a general multiple-relaxation-time (MRT) framework by introducing a shift matrix. When the shift matrix is a unit matrix, the CLBM degrades into an MRT LBM. Based on this, a consistent forcing scheme is developed for the CLBM. The consistency of the nonslip rule, the second-order convergence rate in space, and the property of isotropy for the consistent forcing scheme is demonstrated through numerical simulations of several canonical problems. Several existing forcing schemes previously used in the CLBM are also examined. The study clarifies the relation between MRT LBM and CLBM under a general framework.

  9. Generalizing the Boltzmann equation in complex phase space

    Science.gov (United States)

    Zadehgol, Abed

    2016-08-01

    In this work, a generalized form of the BGK-Boltzmann equation is proposed, where the velocity, position, and time can be represented by real or complex variables. The real representation leads to the conventional BGK-Boltzmann equation, which can recover the continuity and Navier-Stokes equations. We show that the complex representation yields a different set of equations, and it can also recover the conservation and Navier-Stokes equations, at low Mach numbers, provided that the imaginary component of the macroscopic mass can be neglected. We briefly review the Constant Speed Kinetic Model (CSKM), which was introduced in Zadehgol and Ashrafizaadeh [J. Comp. Phys. 274, 803 (2014), 10.1016/j.jcp.2014.06.053] and Zadehgol [Phys. Rev. E 91, 063311 (2015), 10.1103/PhysRevE.91.063311]. The CSKM is then used as a basis to show that the complex-valued equilibrium distribution function of the present model can be identified with a simple singularity in the complex phase space. The virtual particles, in the present work, are concentrated on virtual "branes" which surround the computational nodes. Employing the Cauchy integral formula, it is shown that certain variations of the "branes," in the complex phase space, do not affect the local kinetic states. This property of the new model, which is referred to as the "apparent jumps" in the present work, is used to construct new models. The theoretical findings have been tested by simulating three benchmark flows. The results of the present simulations are in excellent agreement with the previous results reported by others.

  10. Training Scalable Restricted Boltzmann Machines Using a Quantum Annealer

    Science.gov (United States)

    Kumar, V.; Bass, G.; Dulny, J., III

    2016-12-01

    Machine learning and the optimization involved therein is of critical importance for commercial and military applications. Due to the computational complexity of many-variable optimization, the conventional approach is to employ meta-heuristic techniques to find suboptimal solutions. Quantum Annealing (QA) hardware offers a completely novel approach with the potential to obtain significantly better solutions with large speed-ups compared to traditional computing. In this presentation, we describe our development of new machine learning algorithms tailored for QA hardware. We are training restricted Boltzmann machines (RBMs) using QA hardware on large, high-dimensional commercial datasets. Traditional optimization heuristics such as contrastive divergence and other closely related techniques are slow to converge, especially on large datasets. Recent studies have indicated that QA hardware when used as a sampler provides better training performance compared to conventional approaches. Most of these studies have been limited to moderately-sized datasets due to the hardware restrictions imposed by exisitng QA devices, which make it difficult to solve real-world problems at scale. In this work we develop novel strategies to circumvent this issue. We discuss scale-up techniques such as enhanced embedding and partitioned RBMs which allow large commercial datasets to be learned using QA hardware. We present our initial results obtained by training an RBM as an autoencoder on an image dataset. The results obtained so far indicate that the convergence rates can be improved significantly by increasing RBM network connectivity. These ideas can be readily applied to generalized Boltzmann machines and we are currently investigating this in an ongoing project.

  11. Partitioned learning of deep Boltzmann machines for SNP data.

    Science.gov (United States)

    Hess, Moritz; Lenz, Stefan; Blätte, Tamara J; Bullinger, Lars; Binder, Harald

    2017-10-15

    Learning the joint distributions of measurements, and in particular identification of an appropriate low-dimensional manifold, has been found to be a powerful ingredient of deep leaning approaches. Yet, such approaches have hardly been applied to single nucleotide polymorphism (SNP) data, probably due to the high number of features typically exceeding the number of studied individuals. After a brief overview of how deep Boltzmann machines (DBMs), a deep learning approach, can be adapted to SNP data in principle, we specifically present a way to alleviate the dimensionality problem by partitioned learning. We propose a sparse regression approach to coarsely screen the joint distribution of SNPs, followed by training several DBMs on SNP partitions that were identified by the screening. Aggregate features representing SNP patterns and the corresponding SNPs are extracted from the DBMs by a combination of statistical tests and sparse regression. In simulated case-control data, we show how this can uncover complex SNP patterns and augment results from univariate approaches, while maintaining type 1 error control. Time-to-event endpoints are considered in an application with acute myeloid leukemia patients, where SNP patterns are modeled after a pre-screening based on gene expression data. The proposed approach identified three SNPs that seem to jointly influence survival in a validation dataset. This indicates the added value of jointly investigating SNPs compared to standard univariate analyses and makes partitioned learning of DBMs an interesting complementary approach when analyzing SNP data. A Julia package is provided at 'http://github.com/binderh/BoltzmannMachines.jl'. binderh@imbi.uni-freiburg.de. Supplementary data are available at Bioinformatics online.

  12. Immersed Boundary-Lattice Boltzmann Method Using Two Relaxation Times

    Directory of Open Access Journals (Sweden)

    Kosuke Hayashi

    2012-06-01

    Full Text Available An immersed boundary-lattice Boltzmann method (IB-LBM using a two-relaxation time model (TRT is proposed. The collision operator in the lattice Boltzmann equation is modeled using two relaxation times. One of them is used to set the fluid viscosity and the other is for numerical stability and accuracy. A direct-forcing method is utilized for treatment of immersed boundary. A multi-direct forcing method is also implemented to precisely satisfy the boundary conditions at the immersed boundary. Circular Couette flows between a stationary cylinder and a rotating cylinder are simulated for validation of the proposed method. The method is also validated through simulations of circular and spherical falling particles. Effects of the functional forms of the direct-forcing term and the smoothed-delta function, which interpolates the fluid velocity to the immersed boundary and distributes the forcing term to fixed Eulerian grid points, are also examined. As a result, the following conclusions are obtained: (1 the proposed method does not cause non-physical velocity distribution in circular Couette flows even at high relaxation times, whereas the single-relaxation time (SRT model causes a large non-physical velocity distortion at a high relaxation time, (2 the multi-direct forcing reduces the errors in the velocity profile of a circular Couette flow at a high relaxation time, (3 the two-point delta function is better than the four-point delta function at low relaxation times, but worse at high relaxation times, (4 the functional form of the direct-forcing term does not affect predictions, and (5 circular and spherical particles falling in liquids are well predicted by using the proposed method both for two-dimensional and three-dimensional cases.

  13. ATLAS Award for Difficult Task

    CERN Multimedia

    2004-01-01

    Two Russian companies were honoured with an ATLAS Award, for supply of the ATLAS Inner Detector barrel support structure elements, last week. On 23 March the Russian company ORPE Technologiya and its subcontractor, RSP Khrunitchev, were jointly presented with an ATLAS Supplier Award. Since 1998, ORPE Technologiya has been actively involved in the development of the carbon-fibre reinforced plastic elements of the ATLAS Inner Detector barrel support structure. After three years of joint research and development, CERN and ORPE Technologiya launched the manufacturing contract. It had a tight delivery schedule and very demanding specifications in terms of mechanical tolerance and stability. The contract was successfully completed with the arrival of the last element of the structure at CERN on 8 January 2004. The delivery of this key component of the Inner Detector deserves an ATLAS Award given the difficulty of manufacturing the end-frames, which very few companies in the world would have been able to do at an ...

  14. ANNULMENT OF THE ARBITRATION AWARD

    OpenAIRE

    Roxana Maria ROBA

    2015-01-01

    The action for annulment appears to be the unique means of appealing that can be exercised against the arbitration award, similar in content and effects to the recourse against judgments, though being not a devolutive appeal. As the legal nature of this means of appeal is concerned, it is determined by the conclusive feature of the arbitration award which is not likely to be appealed and may be put into force. Since in the common law procedure, such a decision can be challenged only by recour...

  15. Molecules Best Paper Award 2015

    Directory of Open Access Journals (Sweden)

    Derek J. McPhee

    2015-01-01

    Full Text Available Molecules instituted some years ago a “Best Paper” award to recognize the most outstanding papers in the area of organic synthesis, natural products, medicinal chemistry and molecular diversity published each year in Molecules. We are pleased to announce the third “Molecules Best Paper Award” for 2015. The winners were chosen by the Editor-in-Chief and selected editorial board members from among all the papers published in 2011. Reviews and research papers were evaluated separately. We are pleased to announce that the following eight papers have won the Molecules Best Paper Award for 2015:[...

  16. Toxins Best Paper Award 2015

    Directory of Open Access Journals (Sweden)

    Vernon L. Tesh

    2015-03-01

    Full Text Available In order to recognize outstanding papers related to biotoxins and toxinology that have been published in Toxins, the Editorial Board established an annual “Toxins Best Paper Award”. We are pleased to announce the first “Toxins Best Paper Award” for 2015. Nominations were selected by the Editorial Board members, with all papers published in 2011 eligible for consideration. Reviews and original research articles were evaluated separately. Following review and voting by the Toxins Best Paper Award Committee, the following three papers have won Toxins Best Paper Awards for 2015:[...

  17. CoC Awards by Program Component

    Data.gov (United States)

    Department of Housing and Urban Development — CoC Awards by Program Component reports provide snapshots of award data broken down by eligible program component types for the year selected. The reports, which can...

  18. Research Award: Innovation for Inclusive Development program

    International Development Research Centre (IDRC) Digital Library (Canada)

    IDRC CRDI

    2011-09-12

    Research Award: Innovation for Inclusive Development program. Deadline: September 12, 2011. Note that all applications must be sent electronically. IDRC offers Research Awards annually to Canadians, permanent residents of. Canada, and citizens of developing countries pursuing master's or doctoral studies.

  19. How to use WinEdt 5 as an interface for TDA

    OpenAIRE

    Jann, Ben

    2003-01-01

    The text editor WinEdt 5 may be easily configured to provide a user interface for TDA. The configuration described below allows you to launch TDA command files directly from within WinEdt (via menu or shortcut). TDA's standard output will be written to disk and displayed in WinEdt automatically. Furthermore, you may also just execute selected parts of a command file.

  20. Key performance indicators for government and non profit agencies: implementing winning KPIs

    National Research Council Canada - National Science Library

    Parmenter, David

    2012-01-01

    "Winning techniques and strategies for nonprofits and government agencies in creating successful and critical key performance indicatorsBy exploring measures that have transformed businesses, David...

  1. Money and mental wellbeing: a longitudinal study of medium-sized lottery wins.

    Science.gov (United States)

    Gardner, Jonathan; Oswald, Andrew J

    2007-01-01

    One of the famous questions in social science is whether money makes people happy. We offer new evidence by using longitudinal data on a random sample of Britons who receive medium-sized lottery wins of between 1000 pounds and 120,000 pounds (that is, up to approximately US$ 200,000). When compared to two control groups -- one with no wins and the other with small wins -- these individuals go on eventually to exhibit significantly better psychological health. Two years after a lottery win, the average measured improvement in mental wellbeing is 1.4 GHQ points.

  2. Money and mental wellbeing : a longitudinal study of medium-sized lottery wins

    OpenAIRE

    Gardner, Jonathan; Oswald, Andrew J.

    2006-01-01

    One of the famous questions in social science is whether money makes people happy. We offer new evidence by using longitudinal data on a random sample of Britons who receive medium-sized lottery wins of between £1000 and £120,000 (that is, up to approximately U.S. $200,000). When compared to two control groups — one with no wins and the other with small wins — these individuals go on eventually to exhibit significantly better psychological health. Two years after a lottery win, th...

  3. 15 CFR 296.22 - Award criteria.

    Science.gov (United States)

    2010-01-01

    ... 15 Commerce and Foreign Trade 1 2010-01-01 2010-01-01 false Award criteria. 296.22 Section 296.22... Competition Process § 296.22 Award criteria. NIST must determine that a proposal successfully meets all of the Award Criteria set forth in this section for the proposal to receive funding under the Program. The...

  4. 46 CFR 502.409 - Arbitration awards.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 9 2010-10-01 2010-10-01 false Arbitration awards. 502.409 Section 502.409 Shipping... Alternative Dispute Resolution § 502.409 Arbitration awards. (a)(1) The award in an arbitration proceeding... arbitration proceeding may not serve as an estoppel in any other proceeding for any issue that was resolved in...

  5. 40 CFR 36.605 - Award.

    Science.gov (United States)

    2010-07-01

    ... REQUIREMENTS FOR DRUG-FREE WORKPLACE (FINANCIAL ASSISTANCE) Definitions § 36.605 Award. Award means an award of...: (1) A Federal grant or cooperative agreement, in the form of money or property in lieu of money. (2... include: (1) Technical assistance that provides services instead of money. (2) Loans. (3) Loan guarantees...

  6. 22 CFR 312.605 - Award.

    Science.gov (United States)

    2010-04-01

    ... PEACE CORPS GOVERNMENTWIDE REQUIREMENTS FOR DRUG-FREE WORKPLACE (FINANCIAL ASSISTANCE) Definitions § 312.605 Award. Award means an award of financial assistance by the Peace Corps or other Federal agency...)(2) of this section, this paragraph is not applicable for the Peace Corps. ...

  7. A lattice Boltzmann model for multiphase flows with moving contact line and variable density

    Science.gov (United States)

    Huang, Jizu; Wang, Xiao-Ping

    2018-01-01

    In this paper, we develop an efficient lattice Boltzmann model for the two-phase moving contact line problem with variable density. The Navier-Stokes and Cahn-Hilliard equations are recovered from the lattice Boltzmann model proposed by Fakhari and Rahimian [5]. To improve numerical stability, we present a semi-implicit lattice Boltzmann method together with a mixed finite difference scheme. In order to describe the behavior of the contact line motion on the boundary, we incorporate the generalized Navier boundary condition [25] by the nonequilibrium extrapolation method [8]. The proposed method is easy to implement and retains the advantage of the standard lattice Boltzmann method. Numerical tests are carried out to verify the proposed method. Our numerical results show that the present approach is able to model two-phase flows with variable density and moving contact line.

  8. Predictions of Thrombus Formation Using Lattice Boltzmann Method (Modeling of Adhesion Force for Particles to Wall)

    National Research Council Canada - National Science Library

    TAMAGAWA, Masaaki; MATSUO, Sumiaki

    2004-01-01

    ...) with Lattice Boltzmann Method (LBM), applying to orifice-pipe blood flow and flow around a cylinder, which is simple model of turbulent shear stress in the high speed rotary blood pumps and complicated geometry of medical fluid machines...

  9. An introduction to the Boltzmann equation and transport processes in gases

    CERN Document Server

    Kremer, Gilberto M; Colton, David

    2010-01-01

    This book covers classical kinetic theory of gases, presenting basic principles in a self-contained framework and from a more rigorous approach based on the Boltzmann equation. Uses methods in kinetic theory for determining the transport coefficients of gases.

  10. Research Award: Information and Networks

    International Development Research Centre (IDRC) Digital Library (Canada)

    IDRC CRDI

    IDRC is one of the world's leaders in generating new knowledge to meet global challenges. We offer a number of research awards providing a unique opportunity to enhance research skills and gain a fresh perspective on crucial development issues. These one‐year, paid, in‐house programs of training and mentorship ...

  11. Research Award: Think Tank Iniave

    International Development Research Centre (IDRC) Digital Library (Canada)

    Corey Piccioni

    2013-08-07

    Aug 7, 2013 ... These one‐year, paid, in‐house programs of training and mentorship allow award holders to pursue their research goals and work in one of IDRC's dynamic program or division teams. The Think Tank Iniave is a global program that supports independent policy research organizaons – or "think tanks" – in ...

  12. Materials Best Paper Award 2013

    OpenAIRE

    Ophelia Han; Maryam Tabrizian

    2013-01-01

    Materials is instituting an annual award to recognize the outstanding papers in the area of materials science and engineering published in Materials. We are pleased to announce the first “Materials Best Paper Award” for 2013. Nominations were selected by the Section Editor-in-Chiefs and Editorial Board members of Materials from all papers published in 2009.

  13. Research Award: Foundations for Innovation

    International Development Research Centre (IDRC) Digital Library (Canada)

    Office 2004 Test Drive User

    IDRC is one of the world's leaders in generating new knowledge to meet global challenges. We offer a number of research awards providing a unique opportunity to enhance research skills and gain a fresh perspective on crucial development issues. These one‐year, paid, in‐house programs of training and mentorship ...

  14. Two awards for Herwig Schopper

    CERN Multimedia

    2004-01-01

    Former CERN Director-General Herwig Schopper has received two prestigious awards, from UNESCO and from the American Institute of Physics. Herwig Schopper receives the UNESCO Albert Einstein Gold Medal from Koïchiro Matsuura, Director-General of UNESCO. Without any great fanfare, Herwig Schopper has just received two major awards. UNESCO awarded him the Albert Einstein Gold Medal in Paris on 15 April, while on 2 May in Denver the American Institute of Physics (AIP) presented him with the Tate Medal for International Leadership in Physics (together with a USD 10 000 prize). Both awards were in recognition of Herwig Schopper's pivotal role in the construction of international scientific cooperation. Today President of the SESAME Council - the International Centre for Synchrotron Light for Experimental Science and Applications in the Middle East (see Bulletin No. 26/2003) - Herwig Schopper was Director-General of CERN from 1981 to 1988. President of the European Physical Society from 1994 to 1996, he wa...

  15. Carter G. Woodson Book Awards.

    Science.gov (United States)

    Social Education, 2000

    2000-01-01

    Presents the recipients of the 1999 Carter G. Woodson book awards that honor books focusing on ethnic minorities and race relations that are appropriate for elementary and secondary levels. Includes books that cover topics such as life for Japanese Americans in internment camps and lives of 12 black women. (CMK)

  16. Homeland Security Master's Degrees Awarded

    OpenAIRE

    Center for Homeland Defense and Security

    2011-01-01

    Center for Homeland Defense and Security, PRESS RELEASES MONTEREY, Calif. – Twenty-nine professionals who work in the homeland security field were awarded master’s degrees March 25 at the Naval Postgraduate School Center for Homeland Defense and Security. The...

  17. Impact on Learning Award Winners.

    Science.gov (United States)

    School Planning & Management, 2000

    2000-01-01

    Presents awardees of the School Planning & Management magazine's third annual "Impact on Learning Award" given to architectural firms whose K-12 school facilities have solved real-world problems through design, engineering, and technology solutions. Each selection presents the design challenge faced and its solution along with project details. (GR)

  18. Research Award: Donor Partnerships Division

    International Development Research Centre (IDRC) Digital Library (Canada)

    Corey Piccioni

    2013-08-07

    Deadline: August 7, 2013. Please note that all applicafions must be sent electronically. IDRC is one of the world's leaders in generang new knowledge to meet global challenges. We offer a number of research awards providing a unique opportunity to enhance research skills and gain a fresh perspecve on crucial.

  19. Research Award: IDRC Challenge Fund

    International Development Research Centre (IDRC) Digital Library (Canada)

    Corey Piccioni

    2013-08-07

    Deadline: August 7, 2013. Please note that all applicafions must be sent electronically. IDRC is one of the world's leaders in generang new knowledge to meet global challenges. We offer a number of research awards providing a unique opportunity to enhance research skills and gain a fresh perspecve on crucial.

  20. Research Award: Supporng Inclusive Growth

    International Development Research Centre (IDRC) Digital Library (Canada)

    Corey Piccioni

    2013-08-07

    Aug 7, 2013 ... IDRC is one of the world's leaders in generang new knowledge to meet global challenges. We offer a number of research awards providing a unique opportunity to enhance research skills and gain a fresh perspecve on crucial development issues. These one‐year, paid, in‐house programs of training and ...

  1. Research Award: IDRC Challenge Fund

    International Development Research Centre (IDRC) Digital Library (Canada)

    Corey Piccioni

    2014-08-06

    Aug 6, 2014 ... IDRC is one of the world's leaders in generating new knowledge to meet global challenges. We offer a number of research awards providing a unique opportunity to enhance research skills and gain a fresh perspective on crucial development issues. These one‐year, paid, in‐house programs of training ...

  2. Research Award: Policy and Evaluation

    International Development Research Centre (IDRC) Digital Library (Canada)

    Office 2004 Test Drive User

    These awards may be part of an academic requirement. • Your proposed research must focus on one or more developing countries and/or. Canada. Candidates ... Strong research, analytical, and writing skills;. • Strong communication and interpersonal skills; and. • Good judgement, initiative, and ability to set priorities and ...

  3. Chemists awarded international innovation grant

    OpenAIRE

    Doss, Catherine

    2008-01-01

    Three chemists in the College of Science at Virginia Tech have been awarded the top prize in an international innovation grant competition sponsored by Collano, a Switzerland-based company that works to establish new benchmarks for bonding materials with specialized adhesives systems.

  4. Research Award: Think Tank Initiative

    International Development Research Centre (IDRC) Digital Library (Canada)

    Office 2004 Test Drive User

    These one‐year, paid, in‐house programs of training and mentorship allow award holders to pursue their research goals and work in one of IDRC's dynamic program ... Further, the proposal should demonstrate the relevance of the proposed research to local/national/regional policy debates in Asia, Africa or Latin. America.

  5. The FEMP Awards Program: Fostering Institutional Change and Energy Management Excellence

    Energy Technology Data Exchange (ETDEWEB)

    McDermott, Christa; Malone, Elizabeth L.

    2014-05-20

    This report assesses the use of institutional change principles and the institutional impact of award-winning projects through interviews with 22 Department of Energy Federal Energy Management Program (DOE FEMP) award winners. Award winners identified institutional facilitators and barriers in their projects and programs as well as factors in their implementation processes, thus providing information that can guide other efforts. We found that award winners do use strategies based on eight principles of institutional change, most frequently in terms of making changes to infrastructure, engaging leadership, and capitalizing on multiple motivations for making an energy efficiency improvement. The principles drawn on the least often were commitment and social empowerment. Award winners also faced five major types of obstacles that were institutional in nature: lack of resources, constraints of rules, psychological barriers, lack of information, and communication problems. We also used the seven categories of Energy Management Excellence (EME) as a lens to interpret the interview data and assess whether these categories relate to established institutional change principles. We found that the eight principles reflect strategies that have been found to be useful in improving energy efficiency in organizations, whereas the EME categories capture more of a blend of social contextual factors and strategies. The EME categories fill in some of the social context gaps that facilitate institutional change and energy management excellence, for example, personal persistence, a culture that supports creativity and innovation, regular engagement with tenants, contractors, and staff at all levels. Taking together the use of principles, EME criteria, and obstacles faced by interviewees, we make recommendations for how FEMP can better foster institutional change in federal agencies.

  6. Trends in Funding for Dissertation Field Research: Why Do Political Science and Sociology Students Win so Few Awards?

    Science.gov (United States)

    Agarwala, Rina; Teitelbaum, Emmanuel

    2010-01-01

    Despite the size and growth of political science and sociology relative to other disciplines, political science and sociology graduate students have received a declining share of funding for dissertation field research in recent years. Specifically, political science and sociology students are losing out to competitive applicants from…

  7. Picturing Science: The Who, What, and Where of Images in Children's Award-Winning Science Trade Books

    Science.gov (United States)

    Neutze, Donna Lee

    2008-01-01

    Educators, students, and parents are among those who have stereotypical preconceived ideas about science and scientists. The study reports on a content analysis of graphic images in 303 of the "Outstanding Science Trade Books for Students K-12" from the years 1973 through 2005. Using quantitative and qualitative content analysis, all of the images…

  8. General Douglas MacArthur Military Leadership Writing Competition, Command and General Staff College 2012 Award Winning Essays

    Science.gov (United States)

    2013-01-01

    stressful and painful experiences as a normal aspect of existence, part of life that is overall interesting and worthwhile.16 Although there is some...Additionally the chemical and physiological connection between emotion and memory is fairly well established.30 Accessing the endorphin -memory link

  9. Documenting the 'terroir' aspects of award-winning Danish conserves: a model for the development of authentic food products

    DEFF Research Database (Denmark)

    Christensen, Laurids Siig; Hoorfar, Jeffrey; Sorensen, J.

    2012-01-01

    An example of the qualities embedded in the foods produced by small companies based on small Danish islands and reflections on the association between the qualities of the products and their geographical origin is presented. This case study discusses how it can be ensured that qualities in the pr......An example of the qualities embedded in the foods produced by small companies based on small Danish islands and reflections on the association between the qualities of the products and their geographical origin is presented. This case study discusses how it can be ensured that qualities...

  10. Habitat Metro Denver -- Perfecting Award-Winning Affordable Homes Using Building America's Integrated Design Approach

    Energy Technology Data Exchange (ETDEWEB)

    2004-12-01

    Habitat for Humanity's goal is to supply quality housing to poor families while reducing their energy cost burden, especially in light of ever-increasing energy prices. Habitat Metro Denver partnered with the U.S. Department of Energy's Building America Project and the National Renewable Energy Laboratory to improve their construction and design process to create an affordable home that is not only cost-effective and volunteer friendly to build but highly energy efficient and a comfortable place to live.

  11. On kinetic Boltzmann equations and related hydrodynamic flows with dry viscosity

    Directory of Open Access Journals (Sweden)

    Nikolai N. Bogoliubov (Jr.

    2007-01-01

    Full Text Available A two-component particle model of Boltzmann-Vlasov type kinetic equations in the form of special nonlinear integro-differential hydrodynamic systems on an infinite-dimensional functional manifold is discussed. We show that such systems are naturally connected with the nonlinear kinetic Boltzmann-Vlasov equations for some one-dimensional particle flows with pointwise interaction potential between particles. A new type of hydrodynamic two-component Benney equations is constructed and their Hamiltonian structure is analyzed.

  12. L{sup 2}-stability of the Vlasov-Maxwell-Boltzmann system near global Maxwellians

    Energy Technology Data Exchange (ETDEWEB)

    Ha, Seung-Yeal, E-mail: syha@snu.ac.kr; Xiao, Qinghua, E-mail: pdexqh@hotmail.com [Department of Mathematical Sciences, Seoul National University, Seoul 151-747 (Korea, Republic of); Xiong, Linjie, E-mail: xlj@whu.edu.cn; Zhao, Huijiang, E-mail: hhjjzhao@hotmail.com [School of Mathematics and Statistics, Wuhan University, Wuhan 430072 (China)

    2013-12-15

    We present a L{sup 2}-stability theory of the Vlasov-Maxwell-Boltzmann system for the two-species collisional plasma. We show that in a perturbative regime of a global Maxwellian, the L{sup 2}-distance between two strong solutions can be controlled by that between initial data in a Lipschitz manner. Our stability result extends earlier results [Ha, S.-Y. and Xiao, Q.-H., “A revisiting to the L{sup 2}-stability theory of the Boltzmann equation near global Maxwellians,” (submitted) and Ha, S.-Y., Yang, X.-F., and Yun, S.-B., “L{sup 2} stability theory of the Boltzmann equation near a global Maxwellian,” Arch. Ration. Mech. Anal. 197, 657–688 (2010)] on the L{sup 2}-stability of the Boltzmann equation to the Boltzmann equation coupled with self-consistent external forces. As a direct application of our stability result, we show that classical solutions in Duan et al. [“Optimal large-time behavior of the Vlasov-Maxwell-Boltzmann system in the whole space,” Commun. Pure Appl. Math. 24, 1497–1546 (2011)] and Guo [“The Vlasov-Maxwell-Boltzmann system near Maxwellians,” Invent. Math. 153(3), 593–630 (2003)] satisfy a uniform L{sup 2}-stability estimate. This is the first result on the L{sup 2}-stability of the Boltzmann equation coupled with self-consistent field equations in three dimensions.

  13. WHK Interns Win Big at Frederick County Science Fair | Poster

    Science.gov (United States)

    Three Werner H. Kirsten student interns claimed awards at the 35th Annual Frederick County Science and Engineering Fair—and got a shot at the national competition—for imaginative projects that reached out to the rings of Saturn and down to the details of advanced cancer diagnostics.

  14. Berners-Lee wins inaugural Millennium Technology prize

    CERN Multimedia

    2004-01-01

    "World Wide Web inventor Tim Berners-Lee today was named recipient of the first-ever Millennium Technology Prize. The honor, which is accompanied by one million euros, is bestowed by the Finnish Technology Award Foundation as an international acknowledgement of outstanding technological innovation aimed at promoting quality of life and sustainable economic and societal development" (1 page)

  15. Mechanistic slumber vs. statistical insomnia: the early history of Boltzmann's H-theorem (1868-1877)

    Science.gov (United States)

    Badino, M.

    2011-11-01

    An intricate, long, and occasionally heated debate surrounds Boltzmann's H-theorem (1872) and his combinatorial interpretation of the second law (1877). After almost a century of devoted and knowledgeable scholarship, there is still no agreement as to whether Boltzmann changed his view of the second law after Loschmidt's 1876 reversibility argument or whether he had already been holding a probabilistic conception for some years at that point. In this paper, I argue that there was no abrupt statistical turn. In the first part, I discuss the development of Boltzmann's research from 1868 to the formulation of the H-theorem. This reconstruction shows that Boltzmann adopted a pluralistic strategy based on the interplay between a kinetic and a combinatorial approach. Moreover, it shows that the extensive use of asymptotic conditions allowed Boltzmann to bracket the problem of exceptions. In the second part I suggest that both Loschmidt's challenge and Boltzmann's response to it did not concern the H-theorem. The close relation between the theorem and the reversibility argument is a consequence of later investigations on the subject.

  16. Dr. Solco Tromp and the Tromp Award

    Science.gov (United States)

    Greene, J. Scott; Rietveld, Wop J.

    2017-09-01

    The Tromp Award is the highest honor awarded by the International Society of Biometeorology (ISB). The award acknowledges outstanding research in biometeorology by a scientist under the age of 35 and was established in conjunction with the Tromp Foundation and the ISB. In honor of the 60th anniversary of the ISB, this article will provide a brief summary of the life of Dr. Solco Tromp and of the six awardees of the Tromp Award since the inaugural issuance of the award in 1999. The Tromp Award was established in part to recognize and support the efforts of young biometeorological professionals. As the brief summary of the awardees and a few of their selected subsequent publications have shown, the ISB and the Tromp Award has proven effective at identifying and supporting promising young scientists.

  17. Modelling viscoacoustic wave propagation with the lattice Boltzmann method.

    Science.gov (United States)

    Xia, Muming; Wang, Shucheng; Zhou, Hui; Shan, Xiaowen; Chen, Hanming; Li, Qingqing; Zhang, Qingchen

    2017-08-31

    In this paper, the lattice Boltzmann method (LBM) is employed to simulate wave propagation in viscous media. LBM is a kind of microscopic method for modelling waves through tracking the evolution states of a large number of discrete particles. By choosing different relaxation times in LBM experiments and using spectrum ratio method, we can reveal the relationship between the quality factor Q and the parameter τ in LBM. A two-dimensional (2D) homogeneous model and a two-layered model are tested in the numerical experiments, and the LBM results are compared against the reference solution of the viscoacoustic equations based on the Kelvin-Voigt model calculated by finite difference method (FDM). The wavefields and amplitude spectra obtained by LBM coincide with those by FDM, which demonstrates the capability of the LBM with one relaxation time. The new scheme is relatively simple and efficient to implement compared with the traditional lattice methods. In addition, through a mass of experiments, we find that the relaxation time of LBM has a quantitative relationship with Q. Such a novel scheme offers an alternative forward modelling kernel for seismic inversion and a new model to describe the underground media.

  18. Flow visualisation of downhill skiers using the lattice Boltzmann method

    Science.gov (United States)

    Asai, Takeshi; Hong, Sungchan; Ijuin, Koichi

    2017-03-01

    In downhill alpine skiing, skiers often exceed speeds of 120 km h-1, with air resistance substantially affecting the overall race times. To date, studies on air resistance in alpine skiing have used wind tunnels and actual skiers to examine the relationship between the gliding posture and magnitude of drag and for the design of skiing equipment. However, these studies have not revealed the flow velocity distribution and vortex structure around the skier. In the present study, computational fluid dynamics are employed with the lattice Boltzmann method to derive the relationship between total drag and the flow velocity around a downhill skier in the full-tuck position. Furthermore, the flow around the downhill skier is visualised, and its vortex structure is examined. The results show that the total drag force in the downhill skier model is 27.0 N at a flow velocity of 15 m s-1, increasing to 185.8 N at 40 m s-1. From analysis of the drag distribution and the flow profile, the head, upper arms, lower legs, and thighs (including buttocks) are identified as the major sources of drag on a downhill skier. Based on these results, the design of suits and equipment for reducing the drag from each location should be the focus of research and development in ski equipment. This paper describes a pilot study that introduces undergraduate students of physics or engineering into this research field. The results of this study are easy to understand for undergraduate students.

  19. A Boltzmann Constant Determination Based on Johnson Noise Thermometry.

    Science.gov (United States)

    Flowers-Jacobs, N E; Pollarolo, A; Coakley, K J; Fox, A E; Rogalla, H; Tew, W L; Benz, S P

    2017-10-01

    A value for the Boltzmann constant was measured electronically using an improved version of the Johnson Noise Thermometry (JNT) system at the National Institute of Standards and Technology (NIST), USA. This system is different from prior ones, including those from the 2011 determination at NIST and both 2015 and 2017 determinations at the National Institute of Metrology (NIM), China. As in all three previous determinations, the main contribution to the combined uncertainty is the statistical uncertainty in the noise measurement, which is mitigated by accumulating and integrating many weeks of cross-correlated measured data. The second major uncertainty contribution also still results from variations in the frequency response of the ratio of the measured spectral noise of the two noise sources, the sense resistor at the triple-point of water and the superconducting quantum voltage noise source. In this paper, we briefly describe the major differences between our JNT system and previous systems, in particular the input circuit and approach we used to match the frequency responses of the two noise sources. After analyzing and integrating 49 days of accumulated data, we determined a value: k = 1.380 642 9(69)×10-23 J/K with a relative standard uncertainty of 5.0×10-6 and relative offset -4.05×10-6 from the CODATA 2014 recommended value.

  20. Recursive regularization step for high-order lattice Boltzmann methods

    Science.gov (United States)

    Coreixas, Christophe; Wissocq, Gauthier; Puigt, Guillaume; Boussuge, Jean-François; Sagaut, Pierre

    2017-09-01

    A lattice Boltzmann method (LBM) with enhanced stability and accuracy is presented for various Hermite tensor-based lattice structures. The collision operator relies on a regularization step, which is here improved through a recursive computation of nonequilibrium Hermite polynomial coefficients. In addition to the reduced computational cost of this procedure with respect to the standard one, the recursive step allows to considerably enhance the stability and accuracy of the numerical scheme by properly filtering out second- (and higher-) order nonhydrodynamic contributions in under-resolved conditions. This is first shown in the isothermal case where the simulation of the doubly periodic shear layer is performed with a Reynolds number ranging from 104 to 106, and where a thorough analysis of the case at Re=3 ×104 is conducted. In the latter, results obtained using both regularization steps are compared against the Bhatnagar-Gross-Krook LBM for standard (D2Q9) and high-order (D2V17 and D2V37) lattice structures, confirming the tremendous increase of stability range of the proposed approach. Further comparisons on thermal and fully compressible flows, using the general extension of this procedure, are then conducted through the numerical simulation of Sod shock tubes with the D2V37 lattice. They confirm the stability increase induced by the recursive approach as compared with the standard one.

  1. Large-scale lattice-Boltzmann simulations over lambda networks

    Science.gov (United States)

    Saksena, R.; Coveney, P. V.; Pinning, R.; Booth, S.

    Amphiphilic molecules are of immense industrial importance, mainly due to their tendency to align at interfaces in a solution of immiscible species, e.g., oil and water, thereby reducing surface tension. Depending on the concentration of amphiphiles in the solution, they may assemble into a variety of morphologies, such as lamellae, micelles, sponge and cubic bicontinuous structures exhibiting non-trivial rheological properties. The main objective of this work is to study the rheological properties of very large, defect-containing gyroidal systems (of up to 10243 lattice sites) using the lattice-Boltzmann method. Memory requirements for the simulation of such large lattices exceed that available to us on most supercomputers and so we use MPICH-G2/MPIg to investigate geographically distributed domain decomposition simulations across HPCx in the UK and TeraGrid in the US. Use of MPICH-G2/MPIg requires the port-forwarder to work with the grid middleware on HPCx. Data from the simulations is streamed to a high performance visualisation resource at UCL (London) for rendering and visualisation. Lighting the Blue Touchpaper for UK e-Science - Closing Conference of ESLEA Project March 26-28 2007 The George Hotel, Edinburgh, UK

  2. A Boltzmann constant determination based on Johnson noise thermometry

    Science.gov (United States)

    Flowers-Jacobs, N. E.; Pollarolo, A.; Coakley, K. J.; Fox, A. E.; Rogalla, H.; Tew, W. L.; Benz, S. P.

    2017-10-01

    A value for the Boltzmann constant was measured electronically using an improved version of the Johnson Noise Thermometry (JNT) system at the National Institute of Standards and Technology (NIST), USA. This system is different from prior ones, including those from the 2011 determination at NIST and both 2015 and 2017 determinations at the National Institute of Metrology (NIM), China. As in all three previous determinations, the main contribution to the combined uncertainty is the statistical uncertainty in the noise measurement, which is mitigated by accumulating and integrating many weeks of cross-correlated measured data. The second major uncertainty contribution also still results from variations in the frequency response of the ratio of the measured spectral noise of the two noise sources, the sense resistor at the triple-point of water and the superconducting quantum voltage noise source. In this paper, we briefly describe the major differences between our JNT system and previous systems, in particular the input circuit and approach we used to match the frequency responses of the two noise sources. After analyzing and integrating 50 d of accumulated data, we determined a value: k~=1.380 642 9(69)× {{10}-23} J K-1 with a relative standard uncertainty of 5.0× {{10}-6} and relative offset -4.05× {{10}-6} from the CODATA 2014 recommended value.

  3. Equivalence of restricted Boltzmann machines and tensor network states

    Science.gov (United States)

    Chen, Jing; Cheng, Song; Xie, Haidong; Wang, Lei; Xiang, Tao

    2018-02-01

    The restricted Boltzmann machine (RBM) is one of the fundamental building blocks of deep learning. RBM finds wide applications in dimensional reduction, feature extraction, and recommender systems via modeling the probability distributions of a variety of input data including natural images, speech signals, and customer ratings, etc. We build a bridge between RBM and tensor network states (TNS) widely used in quantum many-body physics research. We devise efficient algorithms to translate an RBM into the commonly used TNS. Conversely, we give sufficient and necessary conditions to determine whether a TNS can be transformed into an RBM of given architectures. Revealing these general and constructive connections can cross fertilize both deep learning and quantum many-body physics. Notably, by exploiting the entanglement entropy bound of TNS, we can rigorously quantify the expressive power of RBM on complex data sets. Insights into TNS and its entanglement capacity can guide the design of more powerful deep learning architectures. On the other hand, RBM can represent quantum many-body states with fewer parameters compared to TNS, which may allow more efficient classical simulations.

  4. Stability and stabilization of the lattice Boltzmann method.

    Science.gov (United States)

    Brownlee, R A; Gorban, A N; Levesley, J

    2007-03-01

    We revisit the classical stability versus accuracy dilemma for the lattice Boltzmann methods (LBM). Our goal is a stable method of second-order accuracy for fluid dynamics based on the lattice Bhatnager-Gross-Krook method (LBGK). The LBGK scheme can be recognized as a discrete dynamical system generated by free flight and entropic involution. In this framework the stability and accuracy analysis are more natural. We find the necessary and sufficient conditions for second-order accurate fluid dynamics modeling. In particular, it is proven that in order to guarantee second-order accuracy the distribution should belong to a distinguished surface--the invariant film (up to second order in the time step). This surface is the trajectory of the (quasi)equilibrium distribution surface under free flight. The main instability mechanisms are identified. The simplest recipes for stabilization add no artificial dissipation (up to second order) and provide second-order accuracy of the method. Two other prescriptions add some artificial dissipation locally and prevent the system from loss of positivity and local blowup. Demonstration of the proposed stable LBGK schemes are provided by the numerical simulation of a one-dimensional (1D) shock tube and the unsteady 2D flow around a square cylinder up to Reynolds number Re approximately 20,000.

  5. Real-time keypoint recognition using restricted Boltzmann machine.

    Science.gov (United States)

    Yuan, Miaolong; Tang, Huajin; Li, Haizhou

    2014-11-01

    Feature point recognition is a key component in many vision-based applications, such as vision-based robot navigation, object recognition and classification, image-based modeling, and augmented reality. Real-time performance and high recognition rates are of crucial importance to these applications. In this brief, we propose a novel method for real-time keypoint recognition using restricted Boltzmann machine (RBM). RBMs are generative models that can learn probability distributions of many different types of data including labeled and unlabeled data sets. Due to the inherent noise of the training data sets, we use an RBM to model statistical distributions of the training data. Furthermore, the learned RBM can be used as a competitive classifier to recognize the keypoints in real-time during the tracking stage, thus making it advantageous to be employed in applications that require real-time performance. Experiments have been conducted under a variety of conditions to demonstrate the effectiveness and generalization of the proposed approach.

  6. Lattice Boltzmann heat transfer model for permeable voxels

    Science.gov (United States)

    Pereira, Gerald G.; Wu, Bisheng; Ahmed, Shakil

    2017-12-01

    We develop a gray-scale lattice Boltzmann (LB) model to study fluid flow combined with heat transfer for flow through porous media where voxels may be partially solid (or void). Heat transfer in rocks may lead to deformation, which in turn can modulate the fluid flow and so has significant contribution to rock permeability. The LB temperature field is compared to a finite difference solution of the continuum partial differential equations for fluid flow in a channel. Excellent quantitative agreement is found for both Poiseuille channel flow and Brinkman flow. The LB model is then applied to sample porous media such as packed beds and also more realistic sandstone rock sample, and both the convective and diffusive regimes are recovered when varying the thermal diffusivity. It is found that while the rock permeability can be comparatively small (order milli-Darcy), the temperature field can show significant variation depending on the thermal convection of the fluid. This LB method has significant advantages over other numerical methods such as finite and boundary element methods in dealing with coupled fluid flow and heat transfer in rocks which have irregular and nonsmooth pore spaces.

  7. Volumetric lattice Boltzmann simulation for blood flow in aorta arteries

    Science.gov (United States)

    Deep, Debanjan; Yu, Huidan (Whitney); Teague, Shawn

    2012-11-01

    Complicated moving boundaries pose a major challenge in computational fluid dynamics for complex flows, especially in the biomechanics of both blood flow in the cardiovascular system and air flow in the respiratory system where the compliant nature of the vessels can have significant effects on the flow rate and wall shear stress. We develop a computation approach to treat arbitrarily moving boundaries using a volumetric representation of lattice Boltzmann method, which distributes fluid particles inside lattice cells. A volumetric bounce-back procedure is applied in the streaming step while momentum exchange between the fluid and moving solid boundary are accounted for in the collision sub-step. Additional boundary-induced migration is introduced to conserve fluid mass as the boundary moves across fluid cells. The volumetric LBM (VLBM) is used to simulate blood flow in both normal and dilated aorta arteries. We first compare flow structure and pressure distribution in steady state with results from Navier-Stokes based solver and good agreements are achieved. Then we focus on wall stress within the aorta for different heart pumping condition and present quantitative measurement of wall shear and normal stress.

  8. A Continuum Poisson-Boltzmann Model for Membrane Channel Proteins.

    Science.gov (United States)

    Xiao, Li; Diao, Jianxiong; Greene, D'Artagnan; Wang, Junmei; Luo, Ray

    2017-07-11

    Membrane proteins constitute a large portion of the human proteome and perform a variety of important functions as membrane receptors, transport proteins, enzymes, signaling proteins, and more. Computational studies of membrane proteins are usually much more complicated than those of globular proteins. Here, we propose a new continuum model for Poisson-Boltzmann calculations of membrane channel proteins. Major improvements over the existing continuum slab model are as follows: (1) The location and thickness of the slab model are fine-tuned based on explicit-solvent MD simulations. (2) The highly different accessibilities in the membrane and water regions are addressed with a two-step, two-probe grid-labeling procedure. (3) The water pores/channels are automatically identified. The new continuum membrane model is optimized (by adjusting the membrane probe, as well as the slab thickness and center) to best reproduce the distributions of buried water molecules in the membrane region as sampled in explicit water simulations. Our optimization also shows that the widely adopted water probe of 1.4 Å for globular proteins is a very reasonable default value for membrane protein simulations. It gives the best compromise in reproducing the explicit water distributions in membrane channel proteins, at least in the water accessible pore/channel regions. Finally, we validate the new membrane model by carrying out binding affinity calculations for a potassium channel, and we observe good agreement with the experimental results.

  9. High-order regularization in lattice-Boltzmann equations

    Science.gov (United States)

    Mattila, Keijo K.; Philippi, Paulo C.; Hegele, Luiz A.

    2017-04-01

    A lattice-Boltzmann equation (LBE) is the discrete counterpart of a continuous kinetic model. It can be derived using a Hermite polynomial expansion for the velocity distribution function. Since LBEs are characterized by discrete, finite representations of the microscopic velocity space, the expansion must be truncated and the appropriate order of truncation depends on the hydrodynamic problem under investigation. Here we consider a particular truncation where the non-equilibrium distribution is expanded on a par with the equilibrium distribution, except that the diffusive parts of high-order non-equilibrium moments are filtered, i.e., only the corresponding advective parts are retained after a given rank. The decomposition of moments into diffusive and advective parts is based directly on analytical relations between Hermite polynomial tensors. The resulting, refined regularization procedure leads to recurrence relations where high-order non-equilibrium moments are expressed in terms of low-order ones. The procedure is appealing in the sense that stability can be enhanced without local variation of transport parameters, like viscosity, or without tuning the simulation parameters based on embedded optimization steps. The improved stability properties are here demonstrated using the perturbed double periodic shear layer flow and the Sod shock tube problem as benchmark cases.

  10. Lattice Boltzmann Simulation Optimization on Leading Multicore Platforms

    Energy Technology Data Exchange (ETDEWEB)

    Williams, Samuel; Carter, Jonathan; Oliker, Leonid; Shalf, John; Yelick, Katherine

    2008-02-01

    We present an auto-tuning approach to optimize application performance on emerging multicore architectures. The methodology extends the idea of search-based performance optimizations, popular in linear algebra and FFT libraries, to application-specific computational kernels. Our work applies this strategy to a lattice Boltzmann application (LBMHD) that historically has made poor use of scalar microprocessors due to its complex data structures and memory access patterns. We explore one of the broadest sets of multicore architectures in the HPC literature, including the Intel Clovertown, AMD Opteron X2, Sun Niagara2, STI Cell, as well as the single core Intel Itanium2. Rather than hand-tuning LBMHD for each system, we develop a code generator that allows us identify a highly optimized version for each platform, while amortizing the human programming effort. Results show that our auto-tuned LBMHD application achieves up to a 14x improvement compared with the original code. Additionally, we present detailed analysis of each optimization, which reveal surprising hardware bottlenecks and software challenges for future multicore systems and applications.

  11. Stable lattice Boltzmann model for Maxwell equations in media

    Science.gov (United States)

    Hauser, A.; Verhey, J. L.

    2017-12-01

    The present work shows a method for stable simulations via the lattice Boltzmann (LB) model for electromagnetic waves (EM) transiting homogeneous media. LB models for such media were already presented in the literature, but they suffer from numerical instability when the media transitions are sharp. We use one of these models in the limit of pure vacuum derived from Liu and Yan [Appl. Math. Model. 38, 1710 (2014), 10.1016/j.apm.2013.09.009] and apply an extension that treats the effects of polarization and magnetization separately. We show simulations of simple examples in which EM waves travel into media to quantify error scaling, stability, accuracy, and time scaling. For conductive media, we use the Strang splitting and check the simulations accuracy at the example of the skin effect. Like pure EM propagation, the error for the static limits, which are constructed with a current density added in a first-order scheme, can be less than 1 % . The presented method is an easily implemented alternative for the stabilization of simulation for EM waves propagating in spatially complex structured media properties and arbitrary transitions.

  12. Lattice Boltzmann method for one-dimensional vector radiative transfer.

    Science.gov (United States)

    Zhang, Yong; Yi, Hongliang; Tan, Heping

    2016-02-08

    A one-dimensional vector radiative transfer (VRT) model based on lattice Boltzmann method (LBM) that considers polarization using four Stokes parameters is developed. The angular space is discretized by the discrete-ordinates approach, and the spatial discretization is conducted by LBM. LBM has such attractive properties as simple calculation procedure, straightforward and efficient handing of boundary conditions, and capability of stable and accurate simulation. To validate the performance of LBM for vector radiative transfer, four various test problems are examined. The first case investigates the non-scattering thermal-emitting atmosphere with no external collimated solar. For the other three cases, the external collimated solar and three different scattering types are considered. Particularly, the LBM is extended to solve VRT in the atmospheric aerosol system where the scattering function contains singularities and the hemisphere space distributions for the Stokes vector are presented and discussed. The accuracy and computational efficiency of this algorithm are discussed. Numerical results show that the LBM is accurate, flexible and effective to solve one-dimensional polarized radiative transfer problems.

  13. Teach for America and Teacher Ed: Heads They Win, Tails We Lose

    Science.gov (United States)

    Labaree, David

    2010-01-01

    Teach for America (TFA) is a marvel at marketing, offering elite college students a win-win option: by becoming corps members, they can do good and do well at the same time. Teacher education (TE) programs are in a hopeless position in trying to compete with TFA for prospective students. They cannot provide students with the opportunity to do…

  14. Anthropogenic contamination of a phreatic drinking water winning: 3-dimensional reactive transport modelling

    NARCIS (Netherlands)

    Griffioen, J.|info:eu-repo/dai/nl/091129265; van der Grift, B.|info:eu-repo/dai/nl/373433484; Maas, D.; van den Brink, C.|info:eu-repo/dai/nl/187443416; Zaadnoordijk, J. W.

    2003-01-01

    Groundwater is contaminated at the regional scale by agricultural activities and atmospheric deposition. A 3-D transport model was set-up for a phreatic drinking water winning, where the groundwater composition was monitored accurately. The winning is situated at an area with unconsolidated

  15. Striatal connectivity changes following gambling wins and near-misses: Associations with gambling severity

    NARCIS (Netherlands)

    Holst, R.J. van; Chase, H.W.; Clark, L.

    2014-01-01

    Frontostriatal circuitry is implicated in the cognitive distortions associated with gambling behaviour. 'Near-miss' events, where unsuccessful outcomes are proximal to a jackpot win, recruit overlapping neural circuitry with actual monetary wins. Personal control over a gamble (e.g., via choice) is

  16. Prevention of rhinovirus and poliovirus uncoating by WIN 51711, a new antiviral drug.

    Science.gov (United States)

    Fox, M P; Otto, M J; McKinlay, M A

    1986-07-01

    WIN 51711, a potent new antipicornavirus drug, has been shown to inhibit an early event in the replication cycle of human poliovirus type 2 and human rhinovirus type 2. WIN 51711 was not virucidal and had no measurable effect on the adsorption of [3H]uridine-labeled virions to cells. When virion penetration of the plasma membrane was determined through loss of sensitivity to neutralizing antisera, WIN 51711 had no effect on poliovirus penetration, but inhibited rhinovirus penetration by 40%. In the presence of WIN 51711, exposure of neutral red-encapsidated virus-infected cells to light at 3 h postinfection resulted in a 3-log reduction in the number of infectious centers, indicating that WIN 51711 maintained the viral RNA in the encapsidated state after penetrating the cell membrane. The inhibition of uncoating by WIN 51711 in the neutral red assay was found to be concentration dependent, with a concentration of 0.03 micrograms/ml resulting in a 90% inhibition of uncoating. Sucrose gradient sedimentation of lysates from whole cells infected with [3H]uridine-labeled poliovirus showed that poliovirions remained intact in the presence of WIN 51711, but were uncoated in the absence of drug. WIN 51711 also prevented thermal inactivation of poliovirus infectivity, indicating a direct stabilizing effect of this compound on virion capsid conformation.

  17. 26 CFR 31.3402(q)-1 - Extension of withholding to certain gambling winnings.

    Science.gov (United States)

    2010-04-01

    ... 26 Internal Revenue 15 2010-04-01 2010-04-01 false Extension of withholding to certain gambling... to certain gambling winnings. (a)(1) General rule. Every person, including the Government of the.... With respect to reporting requirements for certain payments of gambling winnings not subject to...

  18. 26 CFR 1.6011-3 - Requirement of statement from payees of certain gambling winnings.

    Science.gov (United States)

    2010-04-01

    ... 26 Internal Revenue 13 2010-04-01 2010-04-01 false Requirement of statement from payees of certain gambling winnings. 1.6011-3 Section 1.6011-3 Internal Revenue INTERNAL REVENUE SERVICE, DEPARTMENT OF THE... of statement from payees of certain gambling winnings. (a) General rule. Except as provided in...

  19. Jackpot? Gender Differences in the Effects of Lottery Wins on Separation

    Science.gov (United States)

    Boertien, Diederik

    2012-01-01

    In this study, information on small to modest lottery wins from the British Household Panel Survey (N = 2,563) was used to investigate the effect of income on separation. The analysis demonstrated that money matters within relationships. Lottery wins temporarily reduced the odds of separation after men won. Men spent more on leisure and became…

  20. LHCb Early Career Scientist Awards

    CERN Multimedia

    Patrick Koppenburg for the LHCb Collaboration

    2016-01-01

    On 15 September 2016, the LHCb collaboration awarded the first set of prizes for outstanding contributions of early career scientists.   From left to right: Guy Wilkinson (LHCb spokesperson), Sascha Stahl, Kevin Dungs, Tim Head, Roel Aaij, Conor Fitzpatrick, Claire Prouvé, Patrick Koppenburg (chair of committee) and Sean Benson. Twenty-five nominations were submitted and considered by the committee, and 5 prizes were awarded to teams or individuals for works that had a significant impact within the last year. The awardees are: Roel Aaij, Sean Benson, Conor Fitzpatrick, Rosen Matev and Sascha Stahl for having implemented and commissioned the revolutionary changes to the LHC Run-2 high-level-trigger, including the first widespread deployment of real-time analysis techniques in High Energy Physics;   Kevin Dungs and Tim Head for having launched the Starterkit initiative, a new style of software tutorials based on modern programming methods. “Starterkit is a group of ph...

  1. New awards for CERN science

    CERN Multimedia

    2013-01-01

    Earlier this week, the European Physical Society (EPS) announced its High Energy and Particle Physics prizes for 2013, and I’m pleased to say that the LHC featured highly. With all that has been happening in the last few years, that’s perhaps not too surprising, but these awards nevertheless constitute a great honour for our community.   The High Energy and Particle Physics Prize went to the ATLAS and CMS collaborations “for the discovery of a Higgs boson, as predicted by the Brout-Englert-Higgs mechanism”, and to Michel Della Negra, Peter Jenni and Tejinder Virdee “for their pioneering and outstanding leadership roles in the making of the ATLAS and CMS experiments”. Among the other awards, the Young Experimental Physicist Prize went to Diego Martinez Santos “for his outstanding contributions to the trigger and commissioning of the LHCb experiment, and the analyses leading to first evidence for the rare decay B0s→ ...

  2. Molecules Best Paper Award 2012

    Directory of Open Access Journals (Sweden)

    Derek J. McPhee

    2012-02-01

    Full Text Available Molecules starts to institute the “Best Paper” award to recognize these outstanding papers in the area of natural products, medicinal chemistry and molecular diversity published in Molecules. We are pleased to announce the first “Molecules Best Paper Award” for 2012. Nominations were selected by the editor-in-chief and selected editorial board members from all the papers published in 2008. [...

  3. Molecules Best Paper Award 2014

    Directory of Open Access Journals (Sweden)

    Derek J. McPhee

    2014-01-01

    Full Text Available Molecules instituted some years ago a “Best Paper” award to recognize the most outstanding papers in the area of natural products, medicinal chemistry and molecular diversity published each year in Molecules. We are pleased to announce the third “Molecules Best Paper Award” for 2014. The winners were chosen by the Editor-in-Chief and selected editorial board members from among all the papers published in 2010. Reviews and research papers were evaluated separately.

  4. Using sound to unmask losses disguised as wins in multiline slot machines.

    Science.gov (United States)

    Dixon, Mike J; Collins, Karen; Harrigan, Kevin A; Graydon, Candice; Fugelsang, Jonathan A

    2015-03-01

    Losses disguised as wins (LDWs) are slot machine outcomes where participants bet on multiple lines and win back less than their wager. Despite losing money, the machine celebrates these outcomes with reinforcing sights and sounds. Here, we sought to show that psychophysically and psychologically, participants treat LDWs as wins, but that we could expose LDWs as losses by using negative sounds as feedback. 157 participants were allocated into one of three conditions: a standard sound condition where LDWs, despite being losses, are paired with winning sights and sounds; a silent condition, where LDWs are paired with silence; and a negative sound condition where LDWs and regular losses are both followed by a negative sound. After viewing a paytable, participants conducted 300 spins on a slot machine simulator while heart rate deceleration (HRD) and skin conductance responses (SCRs) were monitored. Participants were then shown 20 different spin outcomes including LDWs and asked whether they had won or lost on that outcome. Participants then estimated on how many spins (out of 300) they won more than they wagered. SCRs were similar for losses and LDWs (both smaller than actual wins). HRD, however, was steeper for both wins and LDWs, compared to losses. In the standard condition, a majority of participants (mis)categorized LDWs as wins, and significantly overestimated the number of times they actually won. In the negative sound condition, this pattern was reversed; most participants correctly categorized LDWs as losses, and they gave high-fidelity win estimates. We conclude that participants both think and physiologically react to LDWs as though they are wins, a miscategorization that misleads them to think that they are winning more often than they actually are. Sound can be used to effectively prevent this misconception and unmask the disguise of LDWs.

  5. Iranian PhD student wins human-rights prize

    Science.gov (United States)

    Cartwright, Jon

    2013-11-01

    A physicist imprisoned in Iran while on a break from his PhD studies in the US has been awarded a human-rights prize. Omid Kokabee, who had been based at the University of Texas in Austin, has been given the Andrei Sakharov Prize from the American Physical Society (APS) for "his courage in refusing to use his physics knowledge to work on projects that he deemed harmful to humanity, in the face of extreme physical and psychological pressure".

  6. Dynamic permeability of porous media by the lattice Boltzmann method

    Science.gov (United States)

    Adler, P.; Pazdniakou, A.

    2012-04-01

    The main objective of our work is to determine the dynamic permeability of three dimensional porous media by means of the Lattice Boltzmann method (LBM). The Navier-Stokes equation can be numerically solved by LBM which is widely used to address various fluid dynamics problems. Space is discretized by a three-dimensional cubic lattice and time is discretized as well. The generally accepted notation for lattice Boltzmann models is DdQq where D stands for space dimension and Q for the number of discrete velocities. The present model is denoted by D3Q19. Moreover, the Two Relaxation Times variant of the Multi Relaxation Times model is implemented. Bounce back boundary conditions are used on the solid-fluid interfaces. The porous medium is spatially periodic. Reconstructed media were used; they are obtained by imposing a porosity and a correlation function characterized by a correlation length. Real samples can be obtained by MicroCT. In contrast with other previous contributions, the dynamic permeability K(omega) which is a complex number, is derived by imposing an oscillating body force of pulsation omega on the unit cell and by deriving the amplitude and the phase shift of the resulting time dependent seepage velocity. The influence of two limiting parameters, namely the Knudsen number Kn and the discretization for high frequencies, on K(omega) is carefully studied for the first time. Kn is proportional to nu/(cs H) where nu is the kinematic viscosity, cs the speed of sound in the fluid and H a characteristic length scale of the porous medium. Several porous media such as the classical plane Poiseuille flow and the reconstructed media are used to show that it is only for small enough values of Kn that reliable results are obtained. Otherwise, the data depend on Kn and may even be totally unphysical. However, it should be noticed that the limiting value of Kn could not be derived in general since it depends very much on the structure of the medium. Problems occur at

  7. Peristaltic particle transport using the Lattice Boltzmann method

    Energy Technology Data Exchange (ETDEWEB)

    Connington, Kevin William [Los Alamos National Laboratory; Kang, Qinjun [Los Alamos National Laboratory; Viswanathan, Hari S [Los Alamos National Laboratory; Abdel-fattah, Amr [Los Alamos National Laboratory; Chen, Shiyi [JOHNS HOPKINS UNIV.

    2009-01-01

    Peristaltic transport refers to a class of internal fluid flows where the periodic deformation of flexible containing walls elicits a non-negligible fluid motion. It is a mechanism used to transport fluid and immersed solid particles in a tube or channel when it is ineffective or impossible to impose a favorable pressure gradient or desirous to avoid contact between the transported mixture and mechanical moving parts. Peristaltic transport occurs in many physiological situations and has myriad industrial applications. We focus our study on the peristaltic transport of a macroscopic particle in a two-dimensional channel using the lattice Boltzmann method. We systematically investigate the effect of variation of the relevant dimensionless parameters of the system on the particle transport. We find, among other results, a case where an increase in Reynolds number can actually lead to a slight increase in particle transport, and a case where, as the wall deformation increases, the motion of the particle becomes non-negative only. We examine the particle behavior when the system exhibits the peculiar phenomenon of fluid trapping. Under these circumstances, the particle may itself become trapped where it is subsequently transported at the wave speed, which is the maximum possible transport in the absence of a favorable pressure gradient. Finally, we analyze how the particle presence affects stress, pressure, and dissipation in the fluid in hopes of determining preferred working conditions for peristaltic transport of shear-sensitive particles. We find that the levels of shear stress are most hazardous near the throat of the channel. We advise that shear-sensitive particles should be transported under conditions where trapping occurs as the particle is typically situated in a region of innocuous shear stress levels.

  8. Implementing the lattice Boltzmann model on commodity graphics hardware

    Science.gov (United States)

    Kaufman, Arie; Fan, Zhe; Petkov, Kaloian

    2009-06-01

    Modern graphics processing units (GPUs) can perform general-purpose computations in addition to the native specialized graphics operations. Due to the highly parallel nature of graphics processing, the GPU has evolved into a many-core coprocessor that supports high data parallelism. Its performance has been growing at a rate of squared Moore's law, and its peak floating point performance exceeds that of the CPU by an order of magnitude. Therefore, it is a viable platform for time-sensitive and computationally intensive applications. The lattice Boltzmann model (LBM) computations are carried out via linear operations at discrete lattice sites, which can be implemented efficiently using a GPU-based architecture. Our simulations produce results comparable to the CPU version while improving performance by an order of magnitude. We have demonstrated that the GPU is well suited for interactive simulations in many applications, including simulating fire, smoke, lightweight objects in wind, jellyfish swimming in water, and heat shimmering and mirage (using the hybrid thermal LBM). We further advocate the use of a GPU cluster for large scale LBM simulations and for high performance computing. The Stony Brook Visual Computing Cluster has been the platform for several applications, including simulations of real-time plume dispersion in complex urban environments and thermal fluid dynamics in a pressurized water reactor. Major GPU vendors have been targeting the high performance computing market with GPU hardware implementations. Software toolkits such as NVIDIA CUDA provide a convenient development platform that abstracts the GPU and allows access to its underlying stream computing architecture. However, software programming for a GPU cluster remains a challenging task. We have therefore developed the Zippy framework to simplify GPU cluster programming. Zippy is based on global arrays combined with the stream programming model and it hides the low-level details of the

  9. Podolsky electromagnetism and a modification in Stefan-Boltzmann law

    Energy Technology Data Exchange (ETDEWEB)

    Bonin, Carlos Alberto; Bufalo, Rodrigo Santos; Escobar, Bruto Max Pimentel; Zambrano, German Enrique Ramos [Instituto de Fisica Teorica (IFT/UNESP), Sao Paulo, SP (Brazil)

    2009-07-01

    Full text. As it is well-known, gauge fields that emerge from the gauge principle are massless vector fields. Considering the photon as a Proca particle, experience sets an upper limit on its mass. This limit is m{sub Proca} < 6X10{sup -17}eV (PDG 2006). However, a mass term, regardless how small, breaks the gauge symmetry. Nevertheless, there exists a theory in which is possible to introduce a mass term preserving all symmetries of Maxwell electromagnetism, including the gauge one: such theory is known as Podolsky Electromagnetism. Podolsky theory is a second- order-derivative theory and has some remarkable properties, despite those already mentioned: the theory has two sectors, a massive one and massless one, it depends on a free parameter (which happens to be the mass of the massive sector) that, like all other elementary particles's masses of the Standard Model, must be fixed through experiences, and the fact that the electrostatic potential is finite everywhere, including over a punctual charge. Just like Maxwell electromagnetism, Podolsky's is a constrained theory and, since it is of second order in the derivatives, it consists in a much richer theoretical structure. Therefore, from both, theoretical and experimental points of view, Podolsky electromagnetism is a very attractive theory. In this work we study a gas of Podolsky photons at finite temperature through path integration. We show that the massless sector leads to the famous Planck's law for black-body radiation and, therefore, to the Stefan-Boltzmann law. We also show that the massive sector of the Podolsky theory induces a modification in both these laws. It is possible to set limits on the Podolsky parameter through comparison of our results with data from cosmic microwave background radiation. (author)

  10. Survey of electrochemical metal winning processes. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Vaaler, L.E.

    1979-03-01

    The subject program was undertaken to find electrometallurgical technology that could be developed into energy saving commercial metal winning processes. Metals whose current production processes consume significant energy (excepting copper and aluminum) are magnesium, zinc, lead, chromium, manganese, sodium, and titanium. The technology of these metals, with the exception of titanium, was reviewed. Growth of titanium demand has been too small to justify the installation of an electrolyte process that has been developed. This fact and the uncertainty of estimates of future demand dissuaded us from reviewing titanium technology. Opportunities for developing energy saving processes were found for magnesium, zinc, lead, and sodium. Costs for R and D and demonstration plants have been estimated. It appeared that electrolytic methods for chromium and manganese cannot compete energywise or economically with the pyrometallurgical methods of producing the ferroalloys, which are satisfactory for most uses of chromium and manganese.

  11. WinFood data from Kenya and Cambodia

    DEFF Research Database (Denmark)

    Owino, Victor O; Skau, Jutta Kloppenborg Heick; Omollo, Selina

    2015-01-01

    context. A high rate of morbidity among infants made some assessments very difficult, especially drawing of blood and saliva samples. CONCLUSIONS: The challenges were largely contextual. Improvement of local laboratory capacity, training of staff and sensitization of the communities and the Ethics Review...... during randomized, controlled trials (WinFood Study) designed to assess the efficacy of locally produced complementary foods based on traditional animal-source foods (edible termites and spiders) to support growth and nutritional status in Kenyan and Cambodian infants. METHODS: In a randomized...... deuterium oxide enrichment in saliva samples following a standard dose of deuterium solution (0.5 g/kg body weight) to infants. Blood nutrition indicators were determined following the drawing of 3 mL of blood by venipuncture. RESULTS: Challenges included rapid depletion of food rations, high rate of loss...

  12. Winning the war on terror: psychology as a strategic framework.

    Science.gov (United States)

    Beecroft, Nicholas

    2006-01-01

    International relations is fundamentally about people. Psychology provides a wide range of tools to understand the rise of Islamic fundamentalist terrorism and offers part of the framework for its resolution. Western societies need to avoid being consumed with fear, revenge or anger which might lead to polarisation and perpetuate the cycle of violence. Understanding the enemy and the virulence of their ideas is essential to winning the hearts and minds of their potential supporters through dialogue, public diplomacy and foreign policy. The West needs to build trust, relationships, reputation and address double standards in its behaviour in order to build a global coalition of people with shared values. The concept of 'war on terror' has been damaging, not least by inhibiting western societies from the self-reflection required to overcome the challenge of terrorism.

  13. 10 years of Elsevier/JQSRT awards

    Science.gov (United States)

    Stoop, José; Bernath, Peter F.; Mengüç, M. Pinar; Mishchenko, Michael I.; Rothman, Laurence S.

    2017-10-01

    The Elsevier award program administered by the Editorial Board of the Journal of Quantitative Spectroscopy and Radiative Transfer (JQSRT) was conceived in June of 2006 at the 9th Electromagnetic and Light Scattering Conference in St. Petersburg, Russia. Initially the program included three annual Elsevier/JQSRT awards for exceptional early-career scientists working in the main research fields covered by JQSRT: quantitative spectroscopy, radiative transfer, and electromagnetic scattering. In June of 2010 at the 12th Electromagnetic and Light Scattering Conference in Helsinki, Finland, it was decided to expand the award program to include three biennial Elsevier awards intended to celebrate fundamental life-time achievements of internationally recognized leaders in the same research fields. Finally, in 2013 the Elsevier award program was augmented to include a fourth annual early-career award in the category of atmospheric radiation and remote sensing.

  14. Climate Leadership Award for Excellence in GHG Management (Goal Achievement Award)

    Science.gov (United States)

    Apply to the Climate Leadership Award for Excellence in GHG Management (Goal Achievement Award), which publicly recognizes organizations that achieve publicly-set aggressive greenhouse gas emissions reduction goals.

  15. Nominations for Renewable Natural Resources Awards

    Science.gov (United States)

    2006-03-01

    The Renewable Natural Resources Foundation (RNRF) is seeking nominations for three annual awards that honor interdisciplinary achievements in renewable natural resources fields. The RNRF is a consortium of 14 educational, professional, and scientific organizations, including AGU. The RNRF's Sustained Achievement Award honors the long-term contributions of an individual to the protection and conservation of natural resources. The Outstanding Achievement Award recognizes a single project, publication, piece of legislation, or similar concrete achievement that occurred within the last three years.

  16. Donges Receives 2013 Donald L. Turcotte Award

    Science.gov (United States)

    2014-07-01

    Jonathan F. Donges was awarded the 2013 Donald L. Turcotte Award, given annually to recent Ph.D. recipients for outstanding dissertation research that contributes directly to the field of nonlinear geophysics. Donges's Ph.D. thesis is entitled "Functional network macroscopes for probing past and present Earth system dynamics." He gave an invited talk and was formally presented with the award at the 2013 AGU Fall Meeting, held 9-13 December in San Francisco, Calif.

  17. Biswas Receives 2012 Donald L. Turcotte Award

    Science.gov (United States)

    2013-06-01

    Asim Biswas has been awarded the Donald L. Turcotte Award, given annually to recent Ph.D. recipients for outstanding dissertation research that contributes directly to the field of nonlinear geophysics. Asim's Ph.D. thesis is entitled "Multi-scale controls on spatial patterns of soil water storage in the hummocky regions of North America." He gave an invited talk and was formally presented with the award at the 2012 AGU Fall Meeting, held 3-7 December in San Francisco, Calif.

  18. Patient safety reporting systems: sustained quality improvement using a multidisciplinary team and "good catch" awards.

    Science.gov (United States)

    Herzer, Kurt R; Mirrer, Meredith; Xie, Yanjun; Steppan, Jochen; Li, Matthew; Jung, Clinton; Cover, Renee; Doyle, Peter A; Mark, Lynette J

    2012-08-01

    Since 1999, hospitals have made substantial commitments to health care quality and patient safety through individual initiatives of executive leadership involvement in quality, investments in safety culture, education and training for medical students and residents in quality and safety, the creation of patient safety committees, and implementation of patient safety reporting systems. At the Weinberg Surgical Suite at The Johns Hopkins Hospital (Baltimore), a 16-operating-room inpatient/outpatient cancer center, a patient safety reporting process was developed to maximize the usefulness of the reports and the long-term sustainability of quality improvements arising from them. A six-phase framework was created incorporating UHC's Patient Safety Net (PSN): Identify, report, analyze, mitigate, reward, and follow up. Unique features of this process included a multidisciplinary team to review reports, mitigate hazards, educate and empower providers, recognize the identifying/reporting individuals or groups with "Good Catch" awards, and follow up to determine if quality improvements were sustained over time. Good Catch awards have been given in recognition of 29 patient safety hazards identified since 2008; in each of these cases, an initiative was developed to mitigate the original hazard. Twenty-five (86%) of the associated quality improvements have been sustained. Two Good Catch award-winning projects--vials of heparin with an unusually high concentration of the drug that posed a potential overdose hazard and a rapid infusion device that resisted practitioner control--are described in detail. A multidisciplinary team's analysis and mitigation of hazards identified in a patient safety reporting process entailed positive recognition with a Good Catch award, education of practitioners, and long-term follow-up.

  19. Climate Leadership Award for Organizational Leadership

    Science.gov (United States)

    Apply to the Climate Leadership Award for Organizational Leadership, which publicly recognizes organizations for their comprehensive greenhouse gas inventories and aggressive emissions reduction goals.

  20. Presidential Green Chemistry Challenge: 2009 Academic Award

    Science.gov (United States)

    Presidential Green Chemistry Challenge 2009 award winner, Professor Krzysztof Matyjaszewski, developed Atom Transfer Radical Polymerization to make polymers with copper catalysts and environmentally friendly reducing agents.

  1. Daily Public Assistance Grants Award Activity

    Data.gov (United States)

    Department of Homeland Security — Daily activity of Public Assistance Grant Awards, including FEMA Region, State, Disaster Declaration Number, Event description, Mission Assigned agency, Assistance...

  2. Atoms, mechanics, and probability Ludwig Boltzmann's statistico-mechanical writings : an exegesis

    CERN Document Server

    Darrigol, Olivier

    2018-01-01

    One of the pillars of modern science, statistical mechanics, owes much to one man, the Austrian physicist Ludwig Boltzmann (1844-1906). As a result of his unusual working and writing styles, his enormous contribution remains little read and poorly understood. The purpose of this book is to make the Boltzmann corpus more accessible to physicists, philosophers, and historians, and so give it new life. The means are introductory biographical and historical materials, detailed and lucid summaries of every relevant publication, and a final chapter of critical synthesis. Special attention is given to Boltzmann's theoretical tool-box and to his patient construction of lofty formal systems even before their full conceptual import could be known. This constructive tendency largely accounts for his lengthy style, for the abundance of new constructions, for the relative vagueness of their object--and for the puzzlement of commentators. This book will help the reader cross the stylistic barrier and see how ingeniously B...

  3. Development of a coarse-grained water forcefield via multistate iterative Boltzmann inversion

    CERN Document Server

    Moore, Timothy C; McCabe, Clare

    2015-01-01

    A coarse-grained water model is developed using multistate iterative Boltzmann inversion. Following previous work, the k-means algorithm is used to dynamically map multiple water molecules to a single coarse-grained bead, allowing the use of structure-based coarse-graining methods. The model is derived to match the bulk and interfacial properties of liquid water and improves upon previous work that used single state iterative Boltzmann inversion. The model accurately reproduces the density and structural correlations of water at 305 K and 1.0 atm, stability of a liquid droplet at 305 K, and shows little tendency to crystallize at physiological conditions. This work also illustrates several advantages of using multistate iterative Boltzmann inversion for deriving generally applicable coarse-grained forcefields.

  4. PB-AM: An open-source, fully analytical linear poisson-boltzmann solver

    Energy Technology Data Exchange (ETDEWEB)

    Felberg, Lisa E. [Department of Chemical and Biomolecular Engineering, University of California Berkeley, Berkeley California 94720; Brookes, David H. [Department of Chemistry, University of California Berkeley, Berkeley California 94720; Yap, Eng-Hui [Department of Systems and Computational Biology, Albert Einstein College of Medicine, Bronx New York 10461; Jurrus, Elizabeth [Division of Computational and Statistical Analytics, Pacific Northwest National Laboratory, Richland Washington 99352; Scientific Computing and Imaging Institute, University of Utah, Salt Lake City Utah 84112; Baker, Nathan A. [Advanced Computing, Mathematics, and Data Division, Pacific Northwest National Laboratory, Richland Washington 99352; Division of Applied Mathematics, Brown University, Providence Rhode Island 02912; Head-Gordon, Teresa [Department of Chemical and Biomolecular Engineering, University of California Berkeley, Berkeley California 94720; Department of Chemistry, University of California Berkeley, Berkeley California 94720; Department of Bioengineering, University of California Berkeley, Berkeley California 94720; Chemical Sciences Division, Lawrence Berkeley National Labs, Berkeley California 94720

    2016-11-02

    We present the open source distributed software package Poisson-Boltzmann Analytical Method (PB-AM), a fully analytical solution to the linearized Poisson Boltzmann equation. The PB-AM software package includes the generation of outputs files appropriate for visualization using VMD, a Brownian dynamics scheme that uses periodic boundary conditions to simulate dynamics, the ability to specify docking criteria, and offers two different kinetics schemes to evaluate biomolecular association rate constants. Given that PB-AM defines mutual polarization completely and accurately, it can be refactored as a many-body expansion to explore 2- and 3-body polarization. Additionally, the software has been integrated into the Adaptive Poisson-Boltzmann Solver (APBS) software package to make it more accessible to a larger group of scientists, educators and students that are more familiar with the APBS framework.

  5. Nobel prize awards in radiochemistry

    Energy Technology Data Exchange (ETDEWEB)

    Adloff, J.P. [Strasbourg Univ. (France)

    2012-07-01

    In 1996 the Editors of Radiochimica Acta brought out a special volume of the journal to celebrate the hundredth anniversary of the discovery of radioactivity. On the occasion of the 50{sup th} anniversary of Radiochimica Acta, which follows closely upon the centenary of Marie Curie's second Nobel Prize in 1911, the author has the privilege to informally review 'Radiochemistry and Nobel Prize Awards', including discoveries of radioelements and new fields in chemistry based on radiochemical methods. (orig.)

  6. NETPATH-WIN: an interactive user version of the mass-balance model, NETPATH

    Science.gov (United States)

    El-Kadi, A. I.; Plummer, L.N.; Aggarwal, P.

    2011-01-01

    NETPATH-WIN is an interactive user version of NETPATH, an inverse geochemical modeling code used to find mass-balance reaction models that are consistent with the observed chemical and isotopic composition of waters from aquatic systems. NETPATH-WIN was constructed to migrate NETPATH applications into the Microsoft WINDOWS® environment. The new version facilitates model utilization by eliminating difficulties in data preparation and results analysis of the DOS version of NETPATH, while preserving all of the capabilities of the original version. Through example applications, the note describes some of the features of NETPATH-WIN as applied to adjustment of radiocarbon data for geochemical reactions in groundwater systems.

  7. Application of configuration software WinCC in logistics automatic control system

    Science.gov (United States)

    Weng, Yifang; Duan, Zhengang; Lian, Xiaoqin; Zhang, Xiaoli; Yang, Wenying

    2006-11-01

    This paper presents the application of WinCC in Logistics Automatic Control System on the experiment facility of miniature warehouse. The information management system, the supervisory control system and the PLC execution part are developed. The communication between WinCC and PLC based on the PROFIBUS protocol is implemented. DDE Communication, VB as server and WinCC as client, is realized. The system combines information management and supervisory control together and works well. It would be applicable to industry after deeper study.

  8. An integrated Boltzmann+hydrodynamics approach to heavy ion collisions

    Energy Technology Data Exchange (ETDEWEB)

    Petersen, Hannah

    2009-04-22

    In this thesis the first fully integrated Boltzmann+hydrodynamics approach to relativistic heavy ion reactions has been developed. After a short introduction that motivates the study of heavy ion reactions as the tool to get insights about the QCD phase diagram, the most important theoretical approaches to describe the system are reviewed. The hadron-string transport approach that this work is based on is the Ultra-relativistic Quantum Molecular Dynamics (UrQMD) approach. Predictions for the charged particle multiplicities at LHC energies are made. The next step is the development of a new framework to calculate the baryon number density in a transport approach. Time evolutions of the net baryon number and the quark density have been calculated at AGS, SPS and RHIC energies. Studies of phase diagram trajectories using hydrodynamics are performed. The hybrid approach that has been developed as the main part of this thesis is based on the UrQMD transport approach with an intermediate hydrodynamical evolution for the hot and dense stage of the collision. The full (3+1) dimensional ideal relativistic one fluid dynamics evolution is solved using the SHASTA algorithm. Three different equations of state have been used, namely a hadron gas equation of state without a QGP phase transition, a chiral EoS and a bag model EoS including a strong first order phase transition. For the freeze-out transition from hydrodynamics to the cascade calculation two different set-ups are employed. The parameter dependences of the model are investigated and the time evolution of different quantities is explored. The hybrid model calculation is able to reproduce the experimentally measured integrated as well as transverse momentum dependent v{sub 2} values for charged particles. The multiplicity and mean transverse mass excitation function is calculated for pions, protons and kaons in the energy range from E{sub lab}=2-160 A GeV. The HBT correlation of the negatively charged pion source

  9. The Initial Boundary Value Problem for the Boltzmann Equation with Soft Potential

    Science.gov (United States)

    Liu, Shuangqian; Yang, Xiongfeng

    2017-01-01

    Boundary effects are central to the dynamics of the dilute particles governed by the Boltzmann equation. In this paper, we study both the diffuse reflection and the specular reflection boundary value problems for the Boltzmann equation with a soft potential, in which the collision kernel is ruled by the inverse power law. For the diffuse reflection boundary condition, based on an L 2 argument and its interplay with intricate {L^∞} analysis for the linearized Boltzmann equation, we first establish the global existence and then obtain the exponential decay in {L^∞} space for the nonlinear Boltzmann equation in general classes of bounded domain. It turns out that the zero lower bound of the collision frequency and the singularity of the collision kernel lead to some new difficulties for achieving the a priori {L^∞} estimates and time decay rates of the solution. In the course of the proof, we capture some new properties of the probability integrals along the stochastic cycles and improve the {L^2-L^∞} theory to give a more direct approach to overcome those difficulties. As to the specular reflection condition, our key contribution is to develop a new time-velocity weighted {L^∞} theory so that we could deal with the greater difficulties stemming from the complicated velocity relations among the specular cycles and the zero lower bound of the collision frequency. From this new point, we are also able to prove that the solutions of the linearized Boltzmann equation tend to equilibrium exponentially in {L^∞} space with the aid of the L 2 theory and a bootstrap argument. These methods, in the latter case, can be applied to the Boltzmann equation with soft potential for all other types of boundary condition.

  10. Simple Navier’s slip boundary condition for the non-Newtonian Lattice Boltzmann fluid dynamics solver

    DEFF Research Database (Denmark)

    Svec, Oldrich; Skoček, Jan

    2013-01-01

    The ability of the Lattice Boltzmann method, as the fluid dynamics solver, to properly simulate macroscopic Navier’s slip boundary condition is investigated. An approximate equation relating the Lattice Boltzmann variable slip boundary condition with the macroscopic Navier’s slip boundary condition...

  11. 2000 Carter G. Woodson Book Award Winners and Honor Books.

    Science.gov (United States)

    Social Education, 2001

    2001-01-01

    Presents the award winners and honor books at the elementary and secondary levels for the 2000 Carter G. Woodson Book Awards. Explains that these awards recognize exceptional books that address issues related to ethnicity. Provides reviews of each book. (CMK)

  12. 2011 Awards Gala | NIH MedlinePlus the Magazine

    Science.gov (United States)

    ... of health, five recipients will be honored: Distinguished Medical Informatics Award Larry Ellison, Founder and CEO, Oracle Paul G. Rogers Health Communications Award Mehmet Oz, MD, and Michael Roizen, MD, ... Distinguished Medical Science Award Purnell W. Choppin, MD, President Emeritus, ...

  13. Dielectric boundary force in numerical Poisson-Boltzmann methods: Theory and numerical strategies

    Science.gov (United States)

    Cai, Qin; Ye, Xiang; Wang, Jun; Luo, Ray

    2011-10-01

    Continuum modeling of electrostatic interactions based upon the numerical solutions of the Poisson-Boltzmann equation has been widely adopted in biomolecular applications. To extend their applications to molecular dynamics and energy minimization, robust and efficient methodologies to compute solvation forces must be developed. In this study, we have first reviewed the theory for the computation of dielectric boundary force based on the definition of the Maxwell stress tensor. This is followed by a new formulation of the dielectric boundary force suitable for the finite-difference Poisson-Boltzmann methods. We have validated the new formulation with idealized analytical systems and realistic molecular systems.

  14. Turbulent jet computations based on MRT and Cascaded Lattice Boltzmann models

    OpenAIRE

    Geller, S; Uphoff, S.; Krafczyk, M.

    2012-01-01

    In this contribution a numerical study of a turbulent jet flow is presented. The simulation results of two different variants of the Lattice Boltzmann method (LBM) are compared. The first is the well-established D3Q19 MRT model extended by a Smagorinsky Large Eddy Simulation (LES) model. The second is the D3Q27 Factorized Cascaded Lattice Boltzmann (FCLB) model without any additional explicit turbulence model. For this model no studies of turbulent flow with high resolution on nonuniform grid...

  15. Lattice-Boltzmann simulation of laser interaction with weakly ionized helium plasmas.

    Science.gov (United States)

    Li, Huayu; Ki, Hyungson

    2010-07-01

    This paper presents a lattice Boltzmann method for laser interaction with weakly ionized plasmas considering electron impact ionization and three-body recombination. To simulate with physical properties of plasmas, the authors' previous work on the rescaling of variables is employed and the electromagnetic fields are calculated from the Maxwell equations by using the finite-difference time-domain method. To calculate temperature fields, energy equations are derived separately from the Boltzmann equations. In this way, we attempt to solve the full governing equations for plasma dynamics. With the developed model, the continuous-wave CO2 laser interaction with helium is simulated successfully.

  16. A double-distribution-function lattice Boltzmann method for bed-load sediment transport

    OpenAIRE

    Cai, Li; Xu, Wenjing; Luo, Xiaoyu

    2017-01-01

    The governing equations of bed-load sediment transport are the shallow water equations and the Exner equation. To embody the advantages of the lattice Boltzmann method (e.g., simplicity, efficiency), the three-velocity (D1Q3) and five-velocity (D1Q5) double-distribution-function lattice Boltzmann models (DDF-LBMs), which can present the numerical solution for one-dimensional bed-load sediment transport, are proposed here based on the quasi-steady approach. The so-called DDF-LBM means we use t...

  17. A lattice Boltzmann coupled to finite volumes method for solving phase change problems

    Directory of Open Access Journals (Sweden)

    El Ganaoui Mohammed

    2009-01-01

    Full Text Available A numerical scheme coupling lattice Boltzmann and finite volumes approaches has been developed and qualified for test cases of phase change problems. In this work, the coupled partial differential equations of momentum conservation equations are solved with a non uniform lattice Boltzmann method. The energy equation is discretized by using a finite volume method. Simulations show the ability of this developed hybrid method to model the effects of convection, and to predict transfers. Benchmarking is operated both for conductive and convective situation dominating solid/liquid transition. Comparisons are achieved with respect to available analytical solutions and experimental results.

  18. Fractional Boltzmann equation for multiple scattering of resonance radiation in low-temperature plasma

    Energy Technology Data Exchange (ETDEWEB)

    Uchaikin, V V; Sibatov, R T, E-mail: vuchaikin@gmail.com, E-mail: ren_sib@bk.ru [Ulyanovsk State University, 432000, 42 Leo Tolstoy str., Ulyanovsk (Russian Federation)

    2011-04-08

    The fractional Boltzmann equation for resonance radiation transport in plasma is proposed. We start with the standard Boltzmann equation; averaging over photon frequencies leads to the appearance of a fractional derivative. This fact is in accordance with the conception of latent variables leading to hereditary and non-local dynamics (in particular, fractional dynamics). The presence of a fractional material derivative in the equation is concordant with heavy tailed distribution of photon path lengths and with spatiotemporal coupling peculiar to the process. We discuss some methods of solving the obtained equation and demonstrate numerical results in some simple cases.

  19. Global weak solutions and uniform L-stability of the Boltzmann-Enskog equation

    Science.gov (United States)

    Ha, Seung-Yeal; Noh, Se Eun

    We present the regularity theory of renormalized solutions and uniform L-stability estimates of the Boltzmann-Enskog model. We use a multi-dimensional Bony-type functional to control the time-phase space integral of a truncated collision operator. We employ Cercignani's arguments and a Bony-type functional to show that the renormalized solutions to the Boltzmann-Enskog model are weak solutions in usual distributional sense. For the uniform L-stability estimate, we use Lu's trick together with the Hölder inequality.

  20. Boltzmann's H-theorem and the assumption of molecular chaos

    Energy Technology Data Exchange (ETDEWEB)

    Boozer, A D, E-mail: boozer@unm.edu [Department of Physics, University of New Mexico, Albuquerque, NM 87131 (United States)

    2011-09-15

    We describe a simple dynamical model of a one-dimensional ideal gas and use computer simulations of the model to illustrate two fundamental results of kinetic theory: the Boltzmann transport equation and the Boltzmann H-theorem. Although the model is time-reversal invariant, both results predict that the behaviour of the gas is time-asymmetric. We show that the assumption of molecular chaos is a necessary condition, but not a sufficient condition, for such time-asymmetric results to correctly describe the model, and we use computer simulations to investigate the conditions under which the assumption of molecular chaos holds.

  1. Application of Lattice Boltzmann Methods in Complex Mass Transfer Systems

    Science.gov (United States)

    Sun, Ning

    Lattice Boltzmann Method (LBM) is a novel computational fluid dynamics method that can easily handle complex and dynamic boundaries, couple local or interfacial interactions/reactions, and be easily parallelized allowing for simulation of large systems. While most of the current studies in LBM mainly focus on fluid dynamics, however, the inherent power of this method makes it an ideal candidate for the study of mass transfer systems involving complex/dynamic microstructures and local reactions. In this thesis, LBM is introduced to be an alternative computational method for the study of electrochemical energy storage systems (Li-ion batteries (LIBs) and electric double layer capacitors (EDLCs)) and transdermal drug design on mesoscopic scale. Based on traditional LBM, the following in-depth studies have been carried out: (1) For EDLCs, the simulation of diffuse charge dynamics is carried out for both the charge and the discharge processes on 2D systems of complex random electrode geometries (pure random, random spheres and random fibers). Steric effect of concentrated solutions is considered by using modified Poisson-Nernst-Plank (MPNP) equations and compared with regular Poisson-Nernst-Plank (PNP) systems. The effects of electrode microstructures (electrode density, electrode filler morphology, filler size, etc.) on the net charge distribution and charge/discharge time are studied in detail. The influence of applied potential during discharging process is also discussed. (2) For the study of dendrite formation on the anode of LIBs, it is shown that the Lattice Boltzmann model can capture all the experimentally observed features of microstructure evolution at the anode, from smooth to mossy to dendritic. The mechanism of dendrite formation process in mesoscopic scale is discussed in detail and compared with the traditional Sand's time theories. It shows that dendrite formation is closely related to the inhomogeneous reactively at the electrode-electrolyte interface

  2. Research Award: Governance, Security, and Justice

    International Development Research Centre (IDRC) Digital Library (Canada)

    IDRC CRDI

    2014-08-06

    Research Award: Governance, Security, and Justice. Deadline: August 6, 2014. Please note that all applications must be submitted online. IDRC is one of the world's leaders in generating new knowledge to meet global challenges. We offer a number of research awards providing a unique opportunity to enhance research ...

  3. IDRC Doctoral Research Awards 2017 | IDRC - International ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Using the criteria listed below, the IDRC selection committee will rate each application and will identify successful awardees, ensuring that the selection of awards represents all three IDRC program areas. Some awards may be made conditionally, i.e. the candidate will be sent comments which must be addressed before ...

  4. Research award: Collaborative Adaptation Research Initiative in ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2017-09-06

    Sep 6, 2017 ... We offer a number of research awards providing a unique opportunity to enhance research skills and gain a fresh perspective on crucial development issues. These one‐year, paid, in‐house programs of training and mentorship allow award holders to pursue their research goals and work in one of IDRC's ...

  5. Tables Summarizing Awards Supported by IDRC

    International Development Research Centre (IDRC) Digital Library (Canada)

    Carole Labrie

    2013-04-04

    Apr 4, 2013 ... university. Support is for doctoral research awards, full study degrees, post-doc fellowships, internships and sabbaticals in sub-Saharan. Africa, Asia and Latin. America and the Caribbean. Variable. Managed by various developing country institutions. Variable. B. Awards Not Granted Through Competitions.

  6. Virginia Tech student receives Student Leadership Award

    OpenAIRE

    Dickerson, Susan

    2004-01-01

    The Outstanding Undergraduate Student Leader Award is one of 10 University Student Leadership Awards given annually by Virginia Tech's Department of Student Activities in the Division of Student Affairs to recognize outstanding members, extraordinary achievements by an organization, advisers, volunteerism, and service-learning experiences.

  7. The 1995 Carter G. Woodson Book Awards.

    Science.gov (United States)

    Social Education, 1996

    1996-01-01

    Provides concise and interesting reviews of the recipients of the 1995 Carter G. Woodson Book awards. The awards celebrate books for young readers that "treat topics related to ethnic minorities and race relations sensitively and accurately." Reviewed works include biographies of Benjamin Banneker, Marian Anderson, and Harriet Beecher…

  8. Carter G. Woodson Book Awards, 2009

    Science.gov (United States)

    Social Education, 2010

    2010-01-01

    In an effort to promote cultural literacy in children and young adults, the Racism and Social Justice Committee of the National Council for the Social Studies created the Carter G. Woodson Book Award. The purpose of the Woodson Award, given annually since 1974, is to promote the writing, publishing, and dissemination of sensitive and accurate…

  9. The 1994 Carter G. Woodson Book Awards.

    Science.gov (United States)

    Savage, Marsha K.

    1995-01-01

    Presents an annotated bibliography of six books that won the 1994 Carter G. Woodson Book Award presented by the National Council for the Social Studies. States that the award was established to inspire contemporary authors to continue to write books related to ethnic minorities. (CFR)

  10. Judicial Review of Labor Arbitration Awards.

    Science.gov (United States)

    Seitz, Reynolds C.

    The review of grievance arbitration awards in public education constitutes the topic of this second chapter in a book on school law. A discussion of landmark cases outside of education underscores the general principles that have motivated courts to undertake review of arbitration awards. Supreme Court decisions in three cases known as the…

  11. NOTE receives the prestigious ALICE Industrial Award

    CERN Multimedia

    2006-01-01

    "NOTE Lund has been given the ALICE Industrial Award due to good co-operation, great capacity for innovation and high quality of work, as a PCB manufacturer in the CERN project ALICE. Only a small number of awards have so far been conferred to a select number of companies."

  12. 46 CFR Sec. 6 - Awarding of work.

    Science.gov (United States)

    2010-10-01

    ... 46 Shipping 8 2010-10-01 2010-10-01 false Awarding of work. Sec. 6 Section 6 Shipping MARITIME... of work. (a) Those portions of all bids reflecting the total aggregate cost of the work involved shall be opened publicly. The work shall be awarded to the contractor submitting the lowest qualified...

  13. The European Young Chemist Award 2014.

    Science.gov (United States)

    Pignataro, Bruno

    2014-12-08

    The future's bright! The European Young Chemist Award for 2014 was awarded at the 5th EuCheMS Chemistry Congress in Instanbul. Impressions and reflections from the Convener of the event, Professor Bruno Pignataro, are given in the Guest Editorial. © 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  14. Research Award: Food, Environment, and Health | IDRC ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    2016-09-07

    Research Award: Food, Environment, and Health. Deadline: September 7, 2016. Please note that all applications must be submitted online. IDRC is one of the world's leaders in generating new knowledge to meet global challenges. We offer a number of research awards providing a unique opportunity to enhance research ...

  15. 38 CFR 17.257 - Awards procedures.

    Science.gov (United States)

    2010-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2010-07-01 2010-07-01 false Awards procedures. 17.257 Section 17.257 Pensions, Bonuses, and Veterans' Relief DEPARTMENT OF VETERANS AFFAIRS MEDICAL Grants for Exchange of Information § 17.257 Awards procedures. Applications for grants for planning or implementing...

  16. 38 CFR 17.355 - Awards procedures.

    Science.gov (United States)

    2010-07-01

    ... 38 Pensions, Bonuses, and Veterans' Relief 1 2010-07-01 2010-07-01 false Awards procedures. 17.355 Section 17.355 Pensions, Bonuses, and Veterans' Relief DEPARTMENT OF VETERANS AFFAIRS MEDICAL Grants to the Republic of the Philippines § 17.355 Awards procedures. All applications for grants to the...

  17. 2004 National Awards for Museum & Library Service

    Science.gov (United States)

    Institute of Museum and Library Services, 2004

    2004-01-01

    The National Awards for Museum and Library Service give national recognition to institutions that play an integral and essential part in our learning society. The awards celebrate the efforts of libraries and museums of all sizes to connect with their increasingly diverse communities and to serve as centers of lifelong learning. As the pace of…

  18. Research Award: Agriculture and Food Security Program

    International Development Research Centre (IDRC) Digital Library (Canada)

    Office 2004 Test Drive User

    2015-08-06

    Research Award: Agriculture and Food Security. Program. Deadline: August 6, 2015. Please note that all applications must be submitted online. IDRC is one of the world's leaders in generating new knowledge to meet global challenges. We offer a number of research awards providing a unique opportunity to enhance ...

  19. Research Award: Ecosystems and Human Health (Ecohealth ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Jean-Claude Dumais

    Research Award: Ecosystems and Human Health (Ecohealth). Deadline: 12 September 2012. Please note that all applications must be sent electronically. IDRC's Research Awards are a unique opportunity for master's and doctoral-level students, as well as recent graduates to enhance their research skills and gain a fresh ...

  20. 28 CFR 545.29 - Special awards.

    Science.gov (United States)

    2010-07-01

    ... 28 Judicial Administration 2 2010-07-01 2010-07-01 false Special awards. 545.29 Section 545.29 Judicial Administration BUREAU OF PRISONS, DEPARTMENT OF JUSTICE INSTITUTIONAL MANAGEMENT WORK AND COMPENSATION Inmate Work and Performance Pay Program § 545.29 Special awards. (a) Inmates who perform...