Sample records for physics contribution aux

  1. CONTRIBUTION A L'TUDE DU DURCISSEMENT DU NIOBIUM ET DE CERTAINS DE SES ALLIAGES LIS AUX INTERSTITIELS,

    E-print Network

    Paris-Sud XI, Université de

    387 CONTRIBUTION A L'�TUDE DU DURCISSEMENT DU NIOBIUM ET DE CERTAINS DE SES ALLIAGES LI�S AUX traction effectués sous vide entre 20 et 1 200 °C sur divers alliages de Niobium ont permis de distinguer. Abstract. 2014 Tensile tests were run on different Niobium alloys from 20 to 1 200 °C in high vacuum

  2. Hermann Weyl's Contribution to Physics

    NASA Astrophysics Data System (ADS)

    Yang, Chen Ning

    2013-05-01

    In May 1954, at the age of 69, Hermann Weyl gave a lecture1 in Lausanne, as President Ursprung already mentioned. This lecture was largely autobiographical, centering upon various stages of his thinking, especially about philosophy. It touched upon Weyl's first important work in physics: The next epochal event for me was that I made an important mathematical discovery. It concerned the regularity in the distribution of the eigenfrequencies of a continuous medium, like a membrane, an elastic body, or the electromagnetic ether. The idea was one of many, as they probably come to every young person preoccupied with science but while the others soon burst like soap bubbles, this one led, as a short inspection showed, to the goal. I was myself rather taken aback by it as I had not believed myself capable of anything like it...

  3. Beauty and physics: 13 important contributions of Chen Ning Yang

    NASA Astrophysics Data System (ADS)

    Shi, Yu

    2014-06-01

    In 2012, Chen Ning Yang received a 90th birthday gift in the form of a black cube inscribed with his 13 most important contributions, which cover four major areas of physics: statistical mechanics, condensed matter physics, particle physics and field theory. We briefly describe these 13 contributions and make general comments about Yang's distinctive style as a trailblazing leader in research.

  4. Marie Curie's contribution to Medical Physics.

    PubMed

    Jean-Claude, Rosenwald; Nüsslin, Fridtjof

    2013-09-01

    On occasion of its 50th anniversary, the International Organization for Medical Physics (IOMP) from now on is going to celebrate annually an International Day of Medical Physics for which the 7th November, the birthday of Marie Sklodowska Curie, a most exceptional character in science at all and a pioneer of medical physics, has been chosen. This article briefly outlines her outstanding personality, sketches her fundamental discovery of radioactivity and emphasizes the impact of her various achievements on the development of medical physics at large. PMID:23958429

  5. Contributions of Women to Physics 1898-1998

    NASA Astrophysics Data System (ADS)

    Herzenberg, Caroline L.

    1996-05-01

    In 1999 the American Physical Society will celebrate its centenary with many events which will include exhibits on the history of physics. For the celebration, the APS Committee on the Status of Women in Physics is creating a historical archive entitled ''Contributions of Women to Physics 1898 - 1998.'' This is being done with the use of an interactive Webpage on the Internet (http://www.physics.ucla.edu/cwp/). This project is currently in its initial phase, which is to create an electronic archive containing information including the names, major contributions, and major publications of women who have made fundamental, major, or significant contributions to physics this century. There are many more women in our field than most of us realize, and this is a substantial undertaking. Participation by all members of the physics community is invited in identifying names and major contributions of women physicists for this archive. The current status of this project will be reported on.

  6. Physical Disability Contributes to Caregiver Stress in Dementia Caregivers

    Microsoft Academic Search

    David G. Bruce; Glenys A. Paley; Pamela Nichols; David Roberts; Peter J. Underwood; Frank Schaper

    2005-01-01

    Background. Previous findings of studies on the impact of physical illness on caregiver health have been inconsistent. The authors wanted to determine whether physical disability, as determined by the SF-12 survey that provides information on both physical and mental health problems, contributes to caregiver stress. Methods. The authors interviewed 91 primary caregivers (aged 38-85 years) of persons with dementia who

  7. Comment on new physics contributions to Gamma_{12}^s

    E-print Network

    Christian W. Bauer; Nicholas Daniel Dunn

    2010-06-29

    A recent measurement by the D0 collaboration finds a like-sign di-muon charge asymmetry in the B system that is roughly 3 sigma larger than the value predicated by the Standard Model. This suggests new physics contributing to B-Bbar mixing. For the current central value of the CP asymmetry, the required size of Gamma_{12}^s is larger than Standard Model estimates of this quantity. In this paper, we will explore the constraints on new physics contributions to Gamma_{12}^s. We show that there are two dimension six operators of Standard Model fields in the electroweak Hamiltonian whose coefficients are not constrained enough to rule out possible contributions from new physics. We argue that a more precise measurement of tau(B_s)/tau(B_d), which is possible with currently available data, could either support or strongly constrain the existence of new physics in Gamma_{12}^s.

  8. Contributions of 20th Century Women to Physics

    NSDL National Science Digital Library

    "There are more female physicists than people know about!" This claim is made by the producers of this well-documented archive of citation and biographical information about 20th century women physicists, led by UCLA Physics Professor Emeritus, Nina Byers. This archive contains information about more than 50 women in the past century (to 1976) who have made original and important contributions to physics. The archive was compiled by UCLA staff and others "active in fields in which contributions have been made." Details about important contributions, publications, honors, employment history, and references are provided for each woman included in the database. Visitors can search the archive by name or by specific physics fields. A database of the print references used to compile information about the women cited is also available.

  9. PII S0360-3016(02)03802-6 PHYSICS CONTRIBUTION

    E-print Network

    Pouliot, Jean

    PII S0360-3016(02)03802-6 PHYSICS CONTRIBUTION INVERSE PLANNING FOR INTERSTITIAL GYNECOLOGIC The tandem-and-ovoids intracavitary system is an integral part of radiation therapy for treatment to a variety of different patient anatomy types. Furthermore, because of this system, even large cervical

  10. PII S0360-3016(01)02691-8 PHYSICS CONTRIBUTION

    E-print Network

    Pouliot, Jean

    PII S0360-3016(01)02691-8 PHYSICS CONTRIBUTION A COMPARISON BETWEEN TANDEM AND OVOIDS gynecologic brachy- therapy systems--the tandem and ovoids and the Syed-Neblett gynecologic template of the central cervical region, for the interstitial system. On the other hand, becau

  11. PII S0360-3016(01)01667-4 PHYSICS CONTRIBUTION

    E-print Network

    Christensen, Gary E.

    targets) of interest for radiation therapy of cervical cancers is achievable. © 2001 Elsevier Science IncPII S0360-3016(01)01667-4 PHYSICS CONTRIBUTION IMAGE-BASED DOSE PLANNING OF INTRACAVITARY- beam and multiple-ICT course of radiation therapy for locally advanced cervix cancer. These changes

  12. Contributions of athletic identity to child and adolescent physical activity

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Identity theorists maintain that domain-specific self-concepts help explain the differential investment of people's time and effort in various activities. This study examined the contribution of athletic identity and three key demographic variables to physical activity and sports team participation...

  13. Children's Physical Activity: The Contribution of Playing and Walking

    ERIC Educational Resources Information Center

    Mackett, Roger L.; Paskins, James

    2008-01-01

    This paper draws on research in which 200 children were fitted with motion sensors and asked to keep travel and activity diaries. The findings show that walking and playing away from home can contribute significantly to children's volume of physical activity, with consequent implications for their health. Not only do both playing and walking…

  14. Dick Dalitz: Examples of His Contributions to Particle Physics

    E-print Network

    Gary R. Goldstein

    2007-04-30

    Dick Dalitz produced lasting contributions to particle physics for 50 years. Along with Dalitz pairs, Dalitz plots and CDD poles, he did major work in parity violation, hyperon resonance identification, the quark model, and hypernuclei. These topics will be summarized, with some emphasis on the author's collaboration with Dalitz on quark spin and fragmentation correlations, and, particularly, the work on the identification of the top quark and its mass. Short biographical information is interspersed. This paper is based on a presentation at the International School of Subnuclear Physics, Erice 2006.

  15. Dick Dalitz:. Examples of His Contributions to Particle Physics

    NASA Astrophysics Data System (ADS)

    Goldstein, Gary R.

    2008-07-01

    Dick Dalitz produced lasting contributions to particle physics for 50 years. Along with Dalitz pairs, Dalitz plots and CDD poles, he did major work in parity violation, hyperon resonance identification, the quark model, and hypernuclei. These topics will be summarized, with some emphasis on the author's collaboration with Dalitz on quark spin and fragmentation correlations, and, particularly, the work on the identification of the top quark and its mass. Short biographical information is interspersed. This paper is based on a presentation at the International School of Subnuclear Physics, Erice 2006.

  16. Victor Trakhtengerts: His contribution to space plasma physics

    NASA Astrophysics Data System (ADS)

    Demekhov, A. G.

    2015-01-01

    A brief overview is given of the works by Victor Trakhtengerts (1939-2007) to show his contribution to the development of space plasma physics. The focus is on the following areas of his research: cyclotron interaction of waves and particles in the Earth's magnetosphere and related matters; resonance processes in magnetosphere-ionosphere interaction; nonlinear phenomena accompanying the impact of powerful HF radiation on ionospheric plasma; and collective effects in atmospheric electricity.

  17. 'Physical education makes you fit and healthy'. Physical education's contribution to young people's physical activity levels

    Microsoft Academic Search

    S. Fairclough; G. Stratton

    2004-01-01

    The purpose of this study was to assess physical activity levels during high school physical education lessons. The data were considered in relation to recommended levels of physical activity to ascertain whether or not physical education can be effective in helping young people meet health-related goals. Sixty-two boys and 60 girls (aged 11-14 years) wore heart rate telemeters during physical

  18. Instructional Time Research in Physical Education: Contributions and Current Issues

    Microsoft Academic Search

    Amelia M. Lee; Carol Poto

    1988-01-01

    The study of instructional time in classrooms and in physical education has a long history with several modifications along the way. Tracing this history, starting with its roots in models of the classroom teaching process, helps to explain why instructional time has gained the interest of so many in physical education. Instructional time is generally studied with the goal of

  19. There is a rich history of the physical sciences contribut-ing to cancer research and treatment. Max Delbrck, a

    E-print Network

    There is a rich history of the physical sciences contribut- ing to cancer research and treatment gradually become resistant to chemotherapy. Francis Crick and Maurice Wilkins, two physicists, the biologist of cancer biology. Treatments have also been influenced by the physi- cal sciences. Chemotherapy began

  20. SEARCHING FOR NEW PHYSICS: CONTRIBUTIONS TO LEP AND THE LHC

    E-print Network

    Fernandez, Thomas

    education, and I am grateful for that. Dylan, my older brother, pursued his dreams with sacrifice is the statistical interpretation of experimental physics results. My original exposure to this field was with Hannu hypothesis testing with background uncertainty. This was followed by many useful discussions with Bob Cousins

  1. Conceptual and Physical Object Qualities Contribute Differently to Motor Affordances

    ERIC Educational Resources Information Center

    Vingerhoets, G.; Vandamme, K.; Vercammen, A.

    2009-01-01

    Priming studies have demonstrated that an object's intrinsic and extrinsic qualities (size, orientation) influence subsequent motor behavior thus suggesting that these object qualities "afford" actions that are congruent with the prime. We present four experiments that aim to evaluate the relative effect of conceptual and physical object qualities…

  2. Forward physics with the LHCf experiment: a LHC contribution to cosmic-ray physics

    NASA Astrophysics Data System (ADS)

    Bonechi, L.; Adriani, O.; Berti, E.; Bongi, M.; Castellini, G.; D'Alessandro, R.; Del Prete, M.; Haguenauer, M.; Itow, Y.; Kasahara, K.; Makino, Y.; Masuda, K.; Matsubayashi, E.; Menjo, H.; Mitsuka, G.; Muraki, Y.; Papini, P.; Perrot, A.-L.; Ricciarini, S.; Sako, T.; Sakurai, N.; Shimizu, Y.; Suzuki, T.; Tamura, T.; Tiberio, A.; Torii, S.; Tricomi, A.; Turner, W. C.

    2014-04-01

    LHCf is a small detector installed at LHC accelerator to measure neutral particle ?ow in the forward direction of proton -proton (p - p) and proton -nucleus (p - A) interactions. Thanks to the optimal performance that has characterized the last years' running of the LHC collider, several measurements have been taken since 2009 in different running conditions. After data taking for p - p interactions at ?s = 900 GeV, 2.76 TeV and 7 TeV and proton - Lead nucleus (p -Pb) at ?sNN = 5.02 TeV (energy of a couple of projectile and target nucleons in their center of mass reference frame), LHCf is now going to complete its physics program with the 13 TeV p - p run foreseen in 2015. The complete set of results will become a reference data set of forward physics for the calibration and tuning of the hadronic interaction models currently used for the simulation of the atmospheric showers induced by very high energy cosmic rays. For this reason we think that LHCf is giving an important contribution for the study of cosmic rays at the highest energies. In this paper the experiment, the published results and the current status are reviewed.

  3. Content in physical education 1 The Contribution of Two Research Programs on Teaching Content

    E-print Network

    Paris-Sud XI, Université de

    Content in physical education 1 The Contribution of Two Research Programs on Teaching Content: "Pedagogical Content Knowledge" and "Didactics of Physical Education" Chantal Amade-Escot, Toulouse University Abstract Content in physical education has been the subject of research for some years, with most studies

  4. Contributions of basic nuclear physics to the nuclear waste management

    NASA Astrophysics Data System (ADS)

    Flocard, Hubert

    2002-04-01

    Nuclear fission is presently a contested method of electricity production. The issue of nuclear waste management stands out among the reasons why. On the other hand, the nuclear industry has demonstrated its capacity to reliably generate cheap electricity while producing negligible amounts of greenhouse gases. These assets explain why this form of energy is still considered among the options for the long term production of electricity at least in developed countries. However, in order to tackle the still not adequately answered question of the waste, new schemes may have to be considered. Among those which have been advanced recently, the less polluting cycles such as those based on Thorium rather than Uranium and/or the transmutation of the minor actinides and some long lived fission products of the present cycle have been actively investigated. In both cases, it turns that the basic knowledge underlying these methods is either missing or incomplete. This situation opens a window of opportunity for useful contributions from basic nuclear physicists. This article describes some of them and presents the ongoing activities as well as some of the projects put forth for the short or medium term. .

  5. NASA/Marshall Space Flight Center's Contributions to Space Plasma Physics

    NASA Technical Reports Server (NTRS)

    Adrian, M. L.; Six, N. Frank (Technical Monitor)

    2002-01-01

    Since the mid-l970's, the Space Plasma Physics Group at NASA's Marshall Space Flight Center has contributed critical instrumentation to numerous satellite and sounding rocket missions exploring the plasmas of near-Earth space. This talk will review major discoveries in Earth's ionosphere, plasmasphere, and magnetosphere directly attributable to the researchers of the Space Plasma Physics Group and the significance of these discoveries to the field of plasma physics.

  6. The Contribution of Secondary School Physical Education to Lifetime Physical Activity

    Microsoft Academic Search

    Stuart Fairclough; Gareth Stratton; Graham Baldwin

    2002-01-01

    The promotion of lifetime participation in physical activity is a major goal of physical education, which this study considered in the context of curricular and extracurricular opportunities. Questionnaires focusing on PE provision were completed by 51 heads of physical education (HoPE). Results showed that team games predominated over lifetime activities in Key Stages 3 and 4 (p < .01), while

  7. Physical Activity Energy Expenditure in Dutch Adolescents: Contribution of Active Transport to School, Physical Education, and Leisure Time Activities

    ERIC Educational Resources Information Center

    Slingerland, Menno; Borghouts, Lars B.; Hesselink, Matthijs K. C.

    2012-01-01

    Background: Detailed knowledge about physical activity energy expenditure (PAEE) can guide the development of school interventions aimed at reducing overweight in adolescents. However, relevant components of PAEE have never been objectively quantified in this population. This study investigated the contribution of active transport to and from…

  8. Auxin sensitivities of all Arabidopsis Aux/IAAs for degradation in the presence of every TIR1/AFB.

    PubMed

    Shimizu-Mitao, Yasushi; Kakimoto, Tatsuo

    2014-08-01

    Auxin plays a key role in regulation of almost all processes of plant growth and development. Different physiological processes are regulated by different ranges of auxin concentrations; however, the underlying mechanisms creating these differences are largely unknown. The first step of auxin signaling is auxin-dependent interaction of an auxin receptor with transcriptional co-repressors (Aux/IAA), which leads to Aux/IAA degradation. Arabidopsis has six homologous auxin receptors (TIR1 and five AFBs), 29 Aux/IAA proteins and two types of active auxins, IAA and phenylacetic acid (PAA). Therefore, a large number of possible combinations between these three factors may contribute to the creation of complex auxin responses. Using a yeast heterologous reconstitution system, we investigated auxin-dependent degradation of all Arabidopsis Aux/IAAs in combination with every TIR or AFB receptor component. We found that TIR1 and AFB2 were effective in mediating Aux/IAA degradation. We confirmed that the Aux/IAA domain II, which binds TIR1, is essential for degradation. IAA and other natural auxins, 4-chloroindole-3-acetic acid (4-Cl-IAA) and PAA, induced Aux/IAA degradation; and IAA and 4-Cl-IAA had higher activity than PAA. Effective auxin concentrations for Aux/IAA degradation depended on both Aux/IAAs and TIR1 or AFB2 receptors, which is consistent with the Aux/IAA-TIR1/AFB co-receptor concept. PMID:24880779

  9. doi:10.1016/j.ijrobp.2005.07.972 PHYSICS CONTRIBUTION

    E-print Network

    Pouliot, Jean

    doi:10.1016/j.ijrobp.2005.07.972 PHYSICS CONTRIBUTION 3D INVERSE TREATMENT PLANNING FOR THE TANDEM AND OVOID APPLICATOR IN CERVICAL CANCER KELLY D. DEWITT, M.D.,* I. CHOW JOE HSU, M.D.,* JOYCELYN SPEIGHT, M guidelines on 15 patients treated in our department with high-dose-rate brachytherapy for cervical cancer

  10. Collision detection and reaction: A contribution to safe physical Human-Robot Interaction

    Microsoft Academic Search

    Sami Haddadin; Alin Albu-schäffer; Alessandro De Luca; Gerd Hirzinger

    2008-01-01

    In the framework of physical Human-Robot In- teraction (pHRI), methodologies and experimental tests are presented for the problem of detecting and reacting to collisions between a robot manipulator and a human being. Using a lightweight robot that was especially designed for interactive and cooperative tasks, we show how reactive control strategies can significantly contribute to ensuring safety to the human

  11. The contribution of walking to work to adult physical activity levels: a cross sectional study

    PubMed Central

    2014-01-01

    Objective To objectively examine the contribution to adult physical activity levels of walking to work. Methods Employees (n = 103; 36.3 ± 11.7 years) at 17 workplaces in south-west England, who lived within 2 miles (3.2 km) of their workplace, wore Actigraph accelerometers for seven days during waking hours and carried GPS receivers during the commute to and from work. Physical activity volume (accelerometer counts per minute (cpm)) and intensity (minutes of moderate to vigorous physical activity (MVPA)) were computed overall and during the walk to work. Results Total weekday physical activity was 45% higher in participants who walked to work compared to those travelling by car (524.6. ± 170.4 vs 364.6?±?138.4 cpm) and MVPA almost 60% higher (78.1?±?24.9 vs 49.8?±?25.2 minutes per day). No differences were seen in weekend physical activity, and sedentary time did not differ between the groups. Combined accelerometer and GPS data showed that walking to work contributed 47.3% of total weekday MVPA. Conclusions Walking to work was associated with overall higher levels of physical activity in young and middle-aged adults. These data provide preliminary evidence to underpin the need for interventions to increase active commuting, specifically walking, in adults. PMID:24618001

  12. Compliance potential mapping: a tool to assess potential contributions of walking towards physical activity guidelines

    PubMed Central

    2014-01-01

    Background Walking for transport is increasingly considered an important component for meeting physical activity guidelines. This is true for individuals of all ages, and particularly important for seniors, for whom other physical activities may not be recommended. In order to evaluate the potential contributions of walking to physical activity, in this paper the concept of Compliance Potential Mapping is introduced. The concept is illustrated using seniors as a case study. Methods Based on estimates of walking trip distance and frequency, estimates of expected total daily walking distance are obtained. These estimates are converted to weekly walking minutes, which are in turn compared to recommended physical activity guidelines for seniors. Once estimates of travel behavior are available, the approach is straightforward and based on relatively simple map algebra operations. Results Compliance Potential Mapping as a tool to assess the potential contributions of walking towards physical activity is demonstrated using data from Montreal’s 2008 travel survey. The results indicate that the central parts of Montreal Island display higher potential for compliance with physical activity guidelines, but with variations according to age, income, occupation, possession of driver’s license and vehicle, and neighborhood and accessibility parameters. Conclusions Compliance Potential Maps offer valuable information for public health and transportation planning and policy analysis. PMID:24885360

  13. Center For Theoretical Geo/Cosmo Plasma Physics Dr. Tom Chang is internationally known for his contributions in space plasma physics,

    E-print Network

    the prestigious National Thompson Award from ASTM. Dr. John R. Jasperse is head of the theoretical space plasma for his contributions in space plasma physics, condensed matter physics, complexity, and the theory Physics. He was the President of the Society of Engineering Science and a member of the NASA Space Physics

  14. III -INTRODUCTION AUX TESTS STATISTIQUES

    E-print Network

    Croisille, Jean-Pierre

    III - INTRODUCTION AUX TESTS STATISTIQUES J-P. Croisille Universit´e de Lorraine UEL - Ann´ee 2012/2013 Jean-Pierre CROISILLE - Laboratoire LMAM UEL: L'influence des math´ematiques sur la soci´et´e #12 LMAM UEL: L'influence des math´ematiques sur la soci´et´e #12;CHOIX DE L'HYPOTHESE NEUTRE ET DE L

  15. Final Report, CONTRIBUTIONS TO STUDIES OF CP VIOLATION AND HADRONIC PHYSICS WITH THE BABAR COLLABORATION

    SciTech Connect

    Brown, David Norvil [University of Louisville] [University of Louisville

    2013-07-25

    The University of Louisville High Energy Physics group has undertaken a long-term effort in understanding baryon production in elementary particle processes in the 10 GeV energy region. We have contributed significantly to the broad program of the BaBar Collaboration, particularly in support of computing, data visualization, and simulation. We report here on progress in the areas of service to the Collaboration and understanding of baryon production via measurement of inclusive hadronic particle spectra.

  16. The contribution of dance to daily physical activity among adolescent girls

    PubMed Central

    2011-01-01

    Background Structured physical activity (PA) programs are well positioned to promote PA among youth, however, little is known about these programs, particularly dance classes. The aims of this study were to: 1) describe PA levels of girls enrolled in dance classes, 2) determine the contribution of dance classes to total moderate-to-vigorous physical activity (MVPA), and 3) compare PA between days with a dance class (program days) and days without a dance class (non-program days). Methods Participants were 149 girls (11-18 years) enrolled in dance classes in 11 dance studios. Overall PA was assessed with accelerometry for 8 consecutive days, and girls reported when they attended dance classes during those days. The percent contribution of dance classes to total MVPA was calculated, and data were reduced to compare PA on program days to non-program days. Data were analyzed using mixed models, adjusting for total monitoring time. Results Girls engaged in 25.0 ± 0.9 minutes/day of MVPA. Dance classes contributed 28.7% (95% CI: 25.9%-31.6%) to girls' total MVPA. Girls accumulated more MVPA on program (28.7 ± 1.4 minutes/day) than non-program days (16.4 ± 1.5 minutes/day) (p < 0.001). Girls had less sedentary behavior on program (554.0 ± 8.1 minutes/day) than non-program days (600.2 ± 8.7 minutes/day) (p < 0.001). Conclusions Dance classes contributed a substantial proportion (29%) to girls' total MVPA, and girls accumulated 70% more MVPA and 8% less sedentary behavior on program days than on non-program days. Dance classes can make an important contribution to girls' total physical activity. PMID:21816074

  17. Aide aux doctorants pour la participation des Aide aux doctorants pour la participation des colloques

    E-print Network

    Di Girolami, Cristina

    Aide aux doctorants pour la participation à des colloques Aide aux doctorants pour la participation à des colloques retour Formation doctorale Aide aux doctorants pour la participation à des colloques aide vient compléter les financements déjà prévus par les laboratoires et les �coles doctorales pour

  18. Assessing the Contribution of Parks to Physical Activity using GPS and Accelerometry

    PubMed Central

    Evenson, Kelly R.; Wen, Fang; Hillier, Amy; Cohen, Deborah A.

    2013-01-01

    Purpose Parks offer a free option for physical activity in many communities. How much time people spend using parks and the contribution that parks makes to their physical activity is not known. This study describes patterns of park use and physical activity among a diverse adult sample. Methods From five US states, 238 adults enrolled in or near 31 study parks. Participants wore a global positioning system (GPS) monitor (Qstarz BT-Q1000X) and an ActiGraph accelerometer (GT1M) concurrently for three weeks. Parks were mapped from local and national park shape files. Park visits and travel to and from the parks were derived from the objective data. Results Participants visited parks a median of 2.3 times/week and park visits lasted a median of 42.0 minutes. Overall, participants engaged in a median of 21.7 minutes/day of moderate activity and 0.1 minutes/day of vigorous activity, with an average of 8.2% of all moderate and 9.4% of all vigorous activity occurring within the parks. Among those with at least one park visit (n=218), counts per minute, moderate, moderate to vigorous physical activity (MVPA), number and time in MVPA bouts/day, and sedentary behavior were all higher on days when a park was visited compared to days when a park was not visited. Considering several definitions of active travel, walking or bicycling to and from the park added an additional 3.7 to 6.6 mean minutes of MVPA per park visit. Conclusion Parks contributed as a place and destination for physical activity, but were underutilized. One of the next steps in this line of inquiry is to understand characteristics of parks used more often as a place and destination for physical activity. PMID:23531716

  19. Relative Contributions of Adiposity and Muscularity to Physical Function in Community-dwelling Older Adults

    PubMed Central

    Jankowski, Catherine M.; Gozansky, Wendolyn S.; Van Pelt, Rachael E.; Schenkman, Margaret L.; Wolfe, Pamela; Schwartz, Robert S.; Kohrt, Wendy M.

    2015-01-01

    Objective To determine the relative contributions of adiposity and muscularity to multi-dimensional performance-based and perceived physical function in older adults living independently. Methods and Procedures Data from 109 women and men, aged 60 or older, with low serum dehydroepiandrosterone (DHEA) sulfate levels were included in this cross-sectional analysis of baseline measures from a single-site, randomized, controlled trial of DHEA replacement therapy. Physical function was determined by means of performance on the 100-point Continuous Scale-Physical Functional Performance (CS-PFP) test and by self-reporting using the physical function subscale of the Medical Outcomes Short Form-36 (SF36PF). Body composition was measured by dual-energy X-ray absorptiometry (DXA). Linear regression analyses were used to determine the contributions of body mass index (BMI; kg body mass/m2), fat index (FI; kg fat/m2), and appendicular skeletal muscle index (ASMI; kg muscle/m2) to the CS-PFP and SF36PF scores, adjusted for age and sex. Results Age-adjusted regression analyses indicated that FI, but not ASMI, was a significant (P < 0.001) determinant of CS-PFP (R2 = 0.54) and SF36PF (R2 = 0.37). When adjusted for age and sex, BMI was nearly as good a predictor of CS-PFP (R2 = 0.50) and SF36PF (R2 = 0.34) as FI. Discussion Adiposity was a stronger predictor of measured and self-reported physical function than was muscularity in older adults living independently. BMI, adjusted for sex, is a reasonable substitute for adiposity in the prediction of physical function. PMID:18292753

  20. Adult Active Transport in the Netherlands: An Analysis of Its Contribution to Physical Activity Requirements

    PubMed Central

    Fishman, Elliot; Böcker, Lars; Helbich, Marco

    2015-01-01

    Introduction Modern, urban lifestyles have engineered physical activity out of everyday life and this presents a major threat to human health. The Netherlands is a world leader in active travel, particularly cycling, but little research has sought to quantify the cumulative amount of physical activity through everyday walking and cycling. Methods Using data collected as part of the Dutch National Travel Survey (2010 – 2012), this paper determines the degree to which Dutch walking and cycling contributes to meeting minimum level of physical activity of 150 minutes of moderate intensity aerobic activity throughout the week. The sample includes 74,465 individuals who recorded at least some travel on the day surveyed. As physical activity benefits are cumulative, all walking and cycling trips are analysed, including those to and from public transport. These trips are then converted into an established measure of physical activity intensity, known as metabolic equivalents of tasks. Multivariate Tobit regression models were performed on a range of socio-demographic, transport resources, urban form and meteorological characteristics. Results The results reveal that Dutch men and women participate in 24 and 28 minutes of daily physical activity through walking and cycling, which is 41% and 55% more than the minimum recommended level. It should be noted however that some 57% of the entire sample failed to record any walking or cycling, and an investigation of this particular group serves as an important topic of future research. Active transport was positively related with age, income, bicycle ownership, urban density and air temperature. Car ownership had a strong negative relationship with physically active travel. Conclusion The results of this analysis demonstrate the significance of active transport to counter the emerging issue of sedentary lifestyle disease. The Dutch experience provides other countries with a highly relevant case study in the creation of environments and cultures that support healthy, active living. PMID:25849902

  1. Article original Rsistance aux antiseptiques et antibiotiques

    E-print Network

    Paris-Sud XI, Université de

    'espèce Staphylococcus epidermidis comme réservoirs possibles de plasmides de résistance aux antibiotiques mais aussi aux are resistant to many antibiotics and especially the Enterococcus and the species Staphylococcus epidermidis for the bacterial species studied (Staphylococcus, Streptococcus and Bacillus), the scattering of the minimum

  2. Contributing to Meaning Making: Facilitating Discourse in the High School Physics Classroom

    NASA Astrophysics Data System (ADS)

    Hovan, Scot Alan

    The Next Generation Science Standards (NGSS) identify eight practices as essential to science and engineering, and these practices include asking students to construct explanations, to engage in argumentation, and to communicate scientific information. However, few teacher-training programs instruct teachers how to facilitate such discourse in the classroom. Modeling Instruction is one movement in physics education that organizes high school physics content around a small number of student-derived scientific models, and it relies on student discourse for the design, development, and deployment of these models. This research is a self-study of one high school physics teacher's experience facilitating large group discourse in the high school modeling physics classroom. Whiteboard meetings and graded discussions were examined by applying the analytical framework created by Mortimer and Scott (2003) to characterize the classroom talk and the discourse facilitation moves that I employed. In addition, elements of discourse analysis were used to examine some of the tensions that I experienced in the facilitation of this discourse. The findings suggest that deliberate identification of the teaching purposes for the discussion can help determine the scaffolding needed for students to enter the Discourse (Gee, 2011) of being a participant in these large group conversations. In addition, connecting the dialogic dimension of exploring student ideas with the authoritative dimension of introducing the scientific view and supporting the internalization of that view is necessary to contribute to meaning making in the science classroom.

  3. Can exergaming contribute to improving physical activity levels and health outcomes in children?

    PubMed

    Daley, Amanda J

    2009-08-01

    Physical inactivity among children is a serious public health problem. It has been suggested that high levels of screen time are contributory factors that encourage sedentary lifestyles in young people. As physical inactivity and obesity levels continue to rise in young people, it has been proposed that new-generation active computer- and video-console games (otherwise known as "exergaming") may offer the opportunity to contribute to young people's energy expenditure during their free time. Although studies have produced some encouraging results regarding the energy costs involved in playing active video-console games, the energy costs of playing the authentic versions of activity-based video games are substantially larger, highlighting that active gaming is no substitute for real sports and activities. A small number of exergaming activities engage children in moderate-intensity activity, but most do not. Only 3 very small trials have considered the effects of exergaming on physical activity levels and/or other health outcomes in children. Evidence from these trials has been mixed; positive trends for improvements in some health outcomes in the intervention groups were noted in 2 trials. No adequately powered randomized, controlled trial has been published to date, and no trial has assessed the long-term impact of exergaming on children's health. We now need high-quality randomized, controlled trials to evaluate the effectiveness and sustainability of exergaming, as well as its clinical relevance; until such studies take place, we should remain cautious about its ability to positively affect children's health. PMID:19596728

  4. Is It Really Just a Social Construction?: The Contribution of the Physical Environment to Sense of Place

    Microsoft Academic Search

    RICHARD C. STEDMAN

    2003-01-01

    Although sense of place definitions nominally include the physical environment, much research has emphasized the social construction of sense of place and neglect the potentially important contributions of the physical environment to place meanings and attachment. This article presents research that tests several models that integrate (1) characteristics of the environment, (2) human uses of the environment, (3) constructed meanings,

  5. Title: Motivational characteristics of obese adolescents toward physical activity: contribution1 of self-determination theory2

    E-print Network

    Paris-Sud XI, Université de

    1 Title: Motivational characteristics of obese adolescents toward physical activity: contribution1 61 62 63 64 65 1 Title: Motivational characteristics of obese adolescents toward physical activity represents a key component of obesity4 treatment.5 Objective: Based on Self-determination theory, this cross

  6. REFLECTIONS ON MY CONTRIBUTIONS TO PARTICLE PHYSICS AND RECENT EXPERIMENTAL RESULTS FROM RHIC.

    SciTech Connect

    SAMIOS,N.P.

    2002-01-18

    My talk today will be composed of two parts. The first part will consist of a summary of some of my experimental contributions over the years. It will not be exhaustive but will highlight the findings that had relevance to the progress of our understanding of particle physics as it has evolved over the years. This section will be divided into three periods: Early, Intermediate and Late, with an in depth discussion of a few of the more significant results. The second part will consist of a discussion of the recently completed Relativistic Heavy Ion Collider (RHIC) machine at Brookhaven National Laboratory (BNL). This will encompass the parameters of the accelerator and some of the interesting and exciting early experimental results emanating from this machine.

  7. New physics contributions to the muon anomalous magnetic moment: A numerical code

    NASA Astrophysics Data System (ADS)

    Queiroz, Farinaldo S.; Shepherd, William

    2014-05-01

    We consider the contributions of individual new particles to the anomalous magnetic moment of the muon, utilizing the generic framework of simplified models. We also present analytic results for all possible one-loop contributions, allowing easy application of these results for more complete models which predict more than one particle capable of correcting the muon magnetic moment. Additionally, we provide a mathematica code to allow the reader to straightforwardly compute any one-loop contribution. Furthermore, we derive bounds on each new particle considered, assuming either the absence of other significant contributions to a? or that the anomaly has been resolved by some other mechanism. The simplified models we consider are constructed without the requirement of SU(2)L invariance, but appropriate chiral coupling choices are also considered. In summary, we found the following particles capable of explaining the current discrepancy, assuming unit couplings: 2 TeV (0.3 TeV) neutral scalar with pure scalar (chiral) couplings, 4 TeV doubly charged scalar with pure pseudoscalar coupling, 0.3-1 TeV neutral vector boson depending on what couplings are used (vector, axial, or mixed), 0.5-1 TeV singly charged vector boson depending on which couplings are chosen, and 3 TeV doubly charged vector-coupled bosons. We also derive the following 1? lower bounds on new particle masses assuming unit couplings and that the experimental anomaly has been otherwise resolved: a doubly charged pseudoscalar must be heavier than 7 TeV, a neutral scalar than 3 TeV, a vector-coupled new neutral boson 600 GeV, an axial-coupled neutral boson 1.5 TeV, a singly charged vector-coupled W' 1 TeV, a doubly charged vector-coupled boson 5 TeV, scalar leptoquarks 10 TeV, and vector leptoquarks 10 TeV. We emphasize that the quoted numbers apply within simplified models, but the reader can easily use our mathematica code to calculate the contribution of their own model of new physics.

  8. Combatting cancer in the third millennium--the contribution of medical physics.

    PubMed

    Webb, Steve

    2008-06-01

    In this invited opening Plenary Lecture at the 1st European Conference on Medical Physics, I indicated some of the roles of medical physics, and specifically medical radiation therapy physics, in the development of improved cancer care for the third millennium. It is said that you are only asked to predict the future if you are seriously old and/or will not be around long enough to know if you were correct. Hopefully, however, I will be able to contribute to this field for many years to come and many of my suggestions will be enacted. "Crystal ball gazing" is, however, a very unscientific process. Scientists are trained to study and analyse situations, report their findings and stop at that. "Future gazing" is not predicting the short-term developments; it is about being bold, radical and stating what today is impossible or almost unthinkable. So-called "scientific prophets" can be entertaining (which I also hope I was in this lecture) but at worst look egocentric and possibly ridiculous. I seem to have survived three previous requests to make scientific predictions [Webb S. The future of photon external-beam radiotherapy: the dream and the reality. Physica Medica 2001;17(4):207-15; Webb S. Radiotherapy physics: the next ten years of technical development. Imaging and Oncology 2005;1:43-50; Webb S, Evans PM. Innovative techniques in radiation therapy editorial, overview and crystal ball gaze to the future. In: Webb S, Evans PM, editors. Innovative techniques in radiation therapy. Seminars in Radiation Oncology 2006;16(4):193-8]. I proposed that important progress usually comes from two quite distinct directions. Firstly, there is "big hit science", that is discoveries or inventions so important that the medical world changes forever because of them. These are what people remember, what reaches the media and what make some people household names. These are rare. Secondly, there is "incremental development" which is how the vast majority of scientists work. Small parts of a big problem are dissected out, solved and contribute to the progress of a bigger field. Sometimes the second way leads to the first, often unplanned to be so. To set the scene I briefly told the story of a few famous "big hit science" stories in which medical physicists have played a leading role--the invention of X-ray computed tomography (CT), the development of intensity-modulated radiation therapy (IMRT) and the invention of the emission tomography imaging modalities: single-photon emission computed tomography (SPECT) and positron emission tomography (PET). I suggested some of the areas I consider important for development. Some are fairly easy to identify and others are more speculative and unusual. I suggested that the goal of medicine and supporting science is to ensure that people live long and die quickly and I contrasted this with the past scenarios. Digressing to philosophy I suggested that there may be a difficulty in that the highly developed world works mainly to make itself even more developed and that many developed governments and aspiring medical physicists may not be as interested as they should be in assisting developing countries. There is therefore, sadly, likely to be an ongoing imbalance of resources. Scientific publishing is also at cross roads where the need to act independently, openly and with wide availability clashes somewhat with the need to generate revenue and support learned societies. Turning to detailed observations, I described how I think the following fields can be advanced: (1) improving the diagnosis of disease, (2) improving the planning of radiotherapy, (3) improving the delivery of radiation treatment and (4) improving the assessment of response to treatment. I ended on a highly philosophical note, which is somewhat critical of how much practical medical physics is currently organised in universities and hospitals and I suggested what should be the real agenda for scientific progress. PMID:18295523

  9. i:\\staff\\auxs\\auxs_uho\\common\\forms_current\\correspondence\\pet agreement.doc University Housing

    E-print Network

    Bertini, Robert L.

    cat litter down the toilets. Housing staff reserves the right to conduct periodic animal welfarei:\\staff\\auxs\\auxs_uho\\common\\forms_current\\correspondence\\pet agreement.doc University Housing Cat arriving on-campus. B. Service animals must be pre-approved by the Disability Resource Center. C. Cats

  10. Roles and activities of Aux\\/IAA proteins in Arabidopsis

    Microsoft Academic Search

    Jason W Reed

    2001-01-01

    Auxin induces various distinct developmental responses, partly by regulating gene expression. The Aux\\/IAA genes are a large gene family, many of which are induced by auxin. Work on ArabidopsisAux\\/IAA genes has begun to reveal that they can regulate development and auxin-induced gene expression. Furthermore, auxin responses require Aux\\/IAA protein turnover. Finally, recent evidence suggests that Aux\\/IAA proteins can mediate light

  11. Aux\\/IAA Proteins Contain a Potent Transcriptional Repression Domain

    Microsoft Academic Search

    Shiv B. Tiwari; Gretchen Hagen; Tom J. Guilfoyle

    2004-01-01

    Aux\\/IAA proteins are short-lived nuclear proteins that repress expression of primary\\/early auxin response genes in protoplast transfection assays. Repression is thought to result from Aux\\/IAA proteins dimerizing with auxin response factor (ARF) transcriptional activators that reside on auxin-responsive promoter elements, referred to as AuxREs. Most Aux\\/IAA proteins contain four conserved domains, designated domains I, II, III, and IV. Domain II

  12. Contributing Factors in Students' Choice of a Physical Therapist Assistant Career: A Contrast with the Physical Therapist Career Pathway

    ERIC Educational Resources Information Center

    Mele, Robert V.

    2009-01-01

    The health care professions have gained significant notoriety as one of the fastest growing career opportunities in the country. In particular, physical therapy has gained a reputation as a vital and significant member of the health care team. The physical therapy field has struggled to provide adequate services to meet patients' needs due to the…

  13. Daily physical activity and its contribution to the health-related quality of life of ambulatory individuals with chronic stroke

    Microsoft Academic Search

    Debbie Rand; Janice J Eng; Pei-Fang Tang; Chihya Hung; Jiann-Shing Jeng

    2010-01-01

    BACKGROUND: Participation in daily physical activity (PA) post-stroke has not previously been investigated as a possible explanatory variable of health-related quality of life (HRQL). The aims were 1) to determine the contribution of daily PA to the HRQL of individuals with chronic stroke and 2) to assess the relationship between the functional ability of these individuals to the amount of

  14. Pythagorean triplets and quadruples: An exceedingly minor contribution to the craft of teaching physics

    E-print Network

    Pontius Jr., Duane H.

    physics Alabama Section of the American Association of Physics Teachers Annual Meeting 25 February 2012 Duane H. Pontius, Jr. T. Morris Hackney Professor of Physics Birmingham-Southern College #12;Selecting vector components · If you're like me, you dance your fingers across the numbers on the keyboard and get

  15. How a gender gap in belonging contributes to the gender gap in physics participation

    NASA Astrophysics Data System (ADS)

    Stout, Jane G.; Ito, Tiffany A.; Finkelstein, Noah D.; Pollock, Steven J.

    2013-01-01

    A great deal of research indicates that feeling a secure sense of belonging in academic settings is critical to students' achievement. In the current work, we present data collected over multiple semesters of a calculus-based introductory physics class indicating that women feel a lower sense of belonging than men in physics. This finding is important because our data also indicate that having a strong sense of belonging in physics positively predicts the degree to which all students see the value of physics in their daily life (an outcome that predicts motivation and persistence in achievement settings) as well as performance on exams in the course. We identify one potential antecedent of women's relatively lower sense of belonging in physics, namely, negative cultural stereotypes about women's inferior ability in physics compared to men. We then discuss pedagogical strategies that might be employed to enhance women's sense of belonging in physics.

  16. Pathologie vgtale (synthse) Rsistances aux herbicides

    E-print Network

    Boyer, Edmond

    Pathologie végétale (synthèse) Résistances aux herbicides chez les mauvaises herbes H Darmency J; accepté le 27 mai 1990) Résumé — L'usage inconsidéré des herbicides pour un désherbage systématique des grandes cultures a conduit à l'apparition de mauvaises herbes résistantes. Huit familles d'herbicides

  17. "Friluftsliv": A Contribution to Equity and Democracy in Swedish Physical Education? An Analysis of Codes in Swedish Physical Education Curricula

    ERIC Educational Resources Information Center

    Backman, Erik

    2011-01-01

    During the last decade, expanding research investigating the school subject Physical Education (PE) indicates a promotion of inequalities regarding which children benefit from PE teaching. Outdoor education and its Scandinavian equivalent "friluftsliv," is a part of the PE curriculum in many countries, and these practices have been claimed to have…

  18. Physical quality of pelleted animal feed 3. Contribution of feedstuff components

    Microsoft Academic Search

    M. Thomas; T. van Vliet

    1998-01-01

    An overview is given of effects of the diet ingredients and their composition (e.g., starch, protein, sugar, fat and fibre content) on production characteristics of pellets and on their physical quality (pellet hardness and pellet durability) as compound animal feeds. Large differences exist in the effect on pellet physical quality within and between groups of diet ingredients when incorporated in

  19. Experimental Semiconductor Physics: The Will to Contribute to the Country’s Economic Development

    NASA Astrophysics Data System (ADS)

    Vigil Santos, Elena

    During the second half of the 1960s the Physics School staff increased sharply. Before this, it had experienced near depletion due to the emigration of many of its members shortly after the triumph of the Revolution. This renaissance took place thanks to the incorporation of the first physicists to graduate from the Physics School itself, and to the return of those who had graduated abroad, mainly from the former Soviet Union. This group of young physicists—with a heavy schedule of teaching duties in spite of their lack of experience—gave strong support to the development of physics in Cuba.

  20. Understanding the Physical-Symptom Experience: The Distinctive Contributions of Anxiety and Depression

    Microsoft Academic Search

    Jerry Suls; M. Bryant Howren

    2012-01-01

    Individuals tend to believe that the somatic sensations they are currently experiencing or have experienced accurately reflect their physical functioning; however, the experience of somatic symptoms is also affected by psychological and social factors. For two decades, the dominant perspective has been that the general tendency to experience negative emotions—negative affectivity (NA; also known as neuroticism or negative emotionality)—inflates physical-symptom

  1. The contribution of conceptual frameworks to knowledge translation interventions in physical therapy.

    PubMed

    Hudon, Anne; Gervais, Mathieu-Joël; Hunt, Matthew

    2015-04-01

    There is growing recognition of the importance of knowledge translation activities in physical therapy to ensure that research findings are integrated into clinical practice, and increasing numbers of knowledge translation interventions are being conducted. Although various frameworks have been developed to guide and facilitate the process of translating knowledge into practice, these tools have been infrequently used in physical therapy knowledge translation studies to date. Knowledge translation in physical therapy implicates multiple stakeholders and environments and involves numerous steps. In light of this complexity, the use of explicit conceptual frameworks by clinicians and researchers conducting knowledge translation interventions is associated with a range of potential benefits. This perspective article argues that such frameworks are important resources to promote the uptake of new evidence in physical therapist practice settings. Four key benefits associated with the use of conceptual frameworks in designing and implementing knowledge translation interventions are identified, and limits related to their use are considered. A sample of 5 conceptual frameworks is evaluated, and how they address common barriers to knowledge translation in physical therapy is assessed. The goal of this analysis is to provide guidance to physical therapists seeking to identify a framework to support the design and implementation of a knowledge translation intervention. Finally, the use of a conceptual framework is illustrated through a case example. Increased use of conceptual frameworks can have a positive impact on the field of knowledge translation in physical therapy and support the development and implementation of robust and effective knowledge translation interventions that help span the research-practice gap. PMID:25060959

  2. Some physical and chemical factors contributing to fragipan strength in Kentucky soils

    Microsoft Academic Search

    M. L. Norfleet; A. D. Karathanasis

    1996-01-01

    Sixteen pedons developed in various parent materials in Kentucky were studied in order to quantify fragipan strength and expression. The contribution to soil strength by clay, bulk density and amorphous or poorly crystalline chemical constituents in the soil fraction were also examined. The triple beam balance apparatus was successfully used to calculate strength of undisturbed, moist clods. Most argillic horizons

  3. Collaborateurs aux lignes directrices en soins primaires

    PubMed Central

    Allan, G. Michael; Kraut, Roni; Crawshay, Aven; Korownyk, Christina; Vandermeer, Ben; Kolber, Michael R.

    2015-01-01

    Résumé Objectif Déterminer la profession des collaborateurs scientifiques aux lignes directrices, les variables associées aux différences de participation des collaborateurs et si oui ou non les lignes directrices en soins primaires fournissent un énoncé sur les conflits d’intérêts. Type d’étude Analyse rétrospective des lignes directrices en soins primaires affichées sur le site web de l’Association médicale canadienne. Deux extracteurs de données indépendants ont examiné les lignes directrices et ont extrait les données pertinentes. Contexte Canada Principaux paramètres à l’étude Commanditaires des lignes directrices, territoire (national ou provincial) visé par les lignes directrices, profession des collaborateurs scientifiques aux lignes directrices et énoncés de conflits d’intérêts rapportés dans les lignes directrices. Résultats Sur les 296 lignes directrices de pratique clinique trouvées dans la section de la médecine familiale de l’Infobanque AMC, 65 apparaissaient en double et 35 se rapportaient de façon limitée à la médecine familiale. Vingt ne fournissaient aucune information sur les collaborateurs scientifiques, ce qui laissait 176 lignes directrices propices à l’analyse. Au total, il y avait 2495 collaborateurs (auteurs et membres de comité) : 1343 (53,8 %) spécialistes autres que des médecins de famille, 423 (17,0 %) médecins de famille, 141 (5,7 %) infirmières, 75 (3,0 %) pharmaciens, 269 (10,8 %) autres cliniciens, 203 (8,1 %) scientifiques non cliniciens et 41 (1,6 %) collaborateurs de profession inconnue. La proportion des collaborateurs de ces professions différait significativement entre les lignes directrices nationales et provinciales, de même qu’entre les lignes directrices financées par l’industrie et celles qui ne l’étaient pas (p < 0,001 dans les 2 cas). Dans le cas des lignes directrices de pratique clinique provinciales, 30,8 % des collaborateurs étaient des médecins de famille et 37,3 % étaient d’autres spécialistes, comparativement à 13,9 % et à 57,4 %, respectivement, dans le cas des lignes directrices nationales. Parmi les lignes directrices financées par l’industrie, 7,8 % des collaborateurs étaient des médecins de famille et 68,6 % étaient d’autres spécialistes, comparativement à 19,4 % et à 49,9 %, respectivement, parmi les lignes directrices qui n’étaient pas financées par l’industrie. Les conflits d’intérêts n’étaient pas rapportés dans 68,9 % des cas. Lorsqu’ils l’étaient, les énoncés sur les conflits d’intérêts se rapportaient à 48,6 % aux spécialistes autres que les médecins de famille, à 30,0 % aux pharmaciens, à 27,7 % aux médecins de famille et à 10,0 % ou moins aux autres groupes; les différences étaient statistiquement significatives (p < 0,001). Conclusion Les spécialistes autres que les médecins de famille sont plus nombreux que tous les autres fournisseurs de soins de santé et sont plus de 3 fois plus enclins à collaborer aux lignes directrices en soins primaires que ne le sont les médecins de famille. Les énoncés sur les conflits d’intérêts n’apparaissaient que dans une minorité de lignes directrices, et lorsqu’ils apparaissaient, les spécialistes autres que les médecins de famille étaient plus enclins à les rapporter. Les lignes directrices ciblant les médecins de famille devraient compter plus de médecins de famille et de soins primaires et moins de collaborateurs en conflit d’intérêts.

  4. New physics contribution to B{yields}K{pi} decays in soft collinear effective theory

    SciTech Connect

    Huitu, K. [Department of Physics, and Helsinki Institute of Physics, P.O.Box 64, FIN-00014, University of Helsinki (Finland); Khalil, S. [Centre for Theoretical Physics, British University in Egypt, El Sherouk City, 11837 (Egypt) and Department of Mathematics, Ain Shams University, Faculty of Science, Cairo, 11566 (Egypt)

    2010-05-01

    We analyze the 5{sigma} difference between the CP asymmetries of the B{sup 0{yields}}K{sup +{pi}-} and B{sup +{yields}}K{sup +{pi}0} decays within the soft collinear effective theory. We find that in the standard model, such a big difference cannot be achieved. We classify then the requirements for the possible New Physics models, which can be responsible for the experimental results. As an example of a New Physics model we study minimal supersymmetric models, and find that the measured asymmetry can be obtained with nonminimal flavor violation.

  5. Huiles essentielles et bactéries résistantes aux antibiotiques

    Microsoft Academic Search

    V.-G. de Billerbeck

    2007-01-01

    Résumé  L’objectif de ce travail est de faire un screening de l’activité antimicrobienne de 40 huiles essentielles sur deux souches\\u000a bactériennes résistantes aux antibiotiques (Staphylococcus aureus et Pseudomonas aeruginosa), souvent responsables de maladies nosocomiales, dans le dessein de créer des formulations d’huiles essentielles pour l’assainissement\\u000a de l’air en milieu hospitalier. S. aureus est une bactérie à Gram positif responsable d’infections des

  6. Contribution of neighborhood income and access to quality physical activity resources to physical activity in ethnic minority women over time.

    PubMed

    Lee, Rebecca E; Mama, Scherezade K; Adamus-Leach, Heather J; Soltero, Erica G

    2015-01-01

    Purpose. To create and test an index to indicate both availability and quality of physical activity (PA) resources (PARs), to examine associations between access to quality PARs and changes in PA, and to determine whether this association differed in lower- and higher-income neighborhoods. Design. Longitudinal, 6-month intervention. Setting. Houston and Austin, Texas. Subjects. African-American and Hispanic or Latina women. Measures. Women (N = 410) completed a questionnaire and accelerometry to measure PA. Neighborhoods (N = 163) were classified as lower- or higher-income by median household income at the census-tract level. PARs were audited using the PARA (physical activity resource assessment). Access to quality PARs was determined by a composite index (QPAR) of features, amenities, and incivilities. Analysis. Repeated measures analyses of variance were used to examine changes in PA by (1) neighborhood income (lower/higher) and QPAR (lower/higher) groups, and (2) neighborhood income (lower/higher) and number of PARs (lower/higher) groups, adjusting for ethnicity, household income, and body mass index. Results. Women in neighborhoods with lower QPAR scores had small increases in self-reported vigorous PA (M ? = 327.8 metabolic equivalent of task [MET]-min/wk) and decreases in accelerometer PA (M = -3.4 min/d), compared to those with higher QPAR scores who had larger increases in self-reported vigorous PA (M ? = 709.8 MET-min/wk) and increased accelerometer PA (M = 3.9 min/d). There was a significant interaction between changes in leisure-time PA, QPAR score, and number of PARs (p = .049). Women with both more PARs and higher QPAR scores reported greater increases in leisure-time PA than women with fewer PARs and lower QPAR scores. Conclusion. Access to higher-quality PARs can help increase or maintain PA over time regardless of neighborhood income. PAR quality is a separate and distinct, important determinant of PA in ethnic minority women. PMID:24524382

  7. L'Anse Aux Meadows, Newfoundland

    NASA Technical Reports Server (NTRS)

    2008-01-01

    L'Anse aux Meadows is a site on the northernmost tip of the island of Newfoundland, located in the Province of Newfoundland and Labrador, Canada, where the remains of a Viking village were discovered in 1960 by the Norwegians Helge and Anne Ingstad. The only authenticated Viking settlement in North America outside Greenland, it was the site of a multi-year archaeological dig that found dwellings, tools and implements that verified its time frame. The settlement, dating more than five hundred years before Christopher Columbus, contains the earliest European structures in North America. Named a World Heritage site by UNESCO, it is thought by many to be the semi-legendary 'Vinland' settlement of explorer Leif Ericson around AD 1000. The settlement at L'Anse aux Meadows consisted of at least eight buildings, including a forge and smelter, and a lumber yard that supported a shipyard. The largest house measured 28.8 by 15.6 m and consisted of several rooms. Sewing and knitting tools found at the site indicate women were present at L'Anse aux Meadows

    The image was acquired on September 14, 2007, covers an area of 14.2 x 14.6 km, and is located at 51.5 degrees north latitude, 55.6 degrees west longitude.

    The U.S. science team is located at NASA's Jet Propulsion Laboratory, Pasadena, Calif. The Terra mission is part of NASA's Science Mission Directorate.

  8. How socio-economic status contributes to participation in leisure-time physical activity

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The aim of this cross-sectional study was to identify individual, social, and environmental contributors (mediators) to individual- and area-level differences in leisure-time physical activity across socio-economic groups. A two-stage stratified sampling design was used to recruit 20– to 65-year-old...

  9. Contribution of Physical Education and Sport to Health-Related Fitness in High School Students

    ERIC Educational Resources Information Center

    Beets, Michael W.; Pitetti, Kenneth H.

    2005-01-01

    This study compared health-related fitness variables of high school students (14 to 19-years-old; 120 males, 67 females) participating in physical education (PE) and school-sponsored sports (SSS) to students participating solely in PE. Cardiovascular fitness, the primary variable of interest, was measured using the 20-Meter Shuttle Ran (number of…

  10. Physical Activity Patterns in Portuguese Adolescents: The Contribution of Extracurricular Sports

    ERIC Educational Resources Information Center

    Silva, Pedro; Sousa, Michael; Aires, Luisa; Seabra, Andre; Ribeiro, Jose; Welk, Gregory; Mota, Jorge

    2010-01-01

    In Portugal, two sports systems exist, one through schools and the other in community clubs. The purpose was to determine the impact of extra-curricular sports (EC sports) on boys' and girls' moderate to vigorous physical activity (MVPA). 208 adolescents (79 boys and 129 girls), between 12 and 18 years old, wore an accelerometer over seven days.…

  11. Facilitated CommunicationThe Contribution of Physical, Emotional and Mental Support

    Microsoft Academic Search

    M. Mary Konstantareas; Gregory Gravelle

    1998-01-01

    This study examined types of support in Facilitated Communication with 12 non-verbal individuals with autism. Literacy tasks of graduated difficulty that included letter identification, word comprehension, labelling and sentence completion were employed to address the possible presence of literacy under three conditions of support: physical, emotional and mental. Although full facilitator support resulted in high performance levels on all tasks,

  12. How Do Maternal Reasoning and Physical Punishment Contribute to Development of Verbal Competence and Behavior Problems?

    ERIC Educational Resources Information Center

    Jester, Jennifer M.; Muzik, Maria; Berube, Renee; Narang, Sonia; Tuttle, Brenda; Jacobson, Joseph

    As part of a longitudinal investigation of the effect of prenatal alcohol exposure on children's cognitive and socioemotional development, this study examined the role of physical punishment on the development of children's externalizing behavior. Participating in this phase were 296 inner-city African-American families with 7-year-olds who had…

  13. Difference, Adapted Physical Activity and Human Development: Potential Contribution of Capabilities Approach

    ERIC Educational Resources Information Center

    Silva, Carla Filomena; Howe, P. David

    2012-01-01

    This paper is a call to Adapted Physical Activity (APA) professionals to increase the reflexive nature of their practice. Drawing upon Foucault's concept of governmentality (1977) APA action may work against its own publicized goals of empowerment and self-determination. To highlight these inconsistencies, we will draw upon historical and social…

  14. Teaching the Nature of Science in Physics Courses: The Contribution of Classroom Historical Inquiries

    ERIC Educational Resources Information Center

    Maurines, Laurence; Beaufils, Daniel

    2013-01-01

    Physics and chemistry programs at the secondary school level in France recommend introducing components of the history of science (HS). Emphasis is placed on a "cultural" dimension, which is poorly defined but essentially refers to elements of epistemological nature. Moreover, the few examples of activities based on HS suggested by the programs…

  15. On the physical contributions to the third-order nonlinear optical response in plasmonic nanocomposites

    NASA Astrophysics Data System (ADS)

    Fernández-Hernández, Roberto Carlos; Gleason-Villagran, Roberto; Torres-Torres, Carlos; Rodríguez-Fernández, Luis; Crespo-Sosa, Alejandro; Cheang-Wong, Juan Carlos; López-Suárez, Alejandra; Rangel-Rojo, Raúl; Oliver, Alicia; Alejandro Reyes-Esqueda, Jorge

    2012-12-01

    Au and Ag isotropic and anisotropic nanocomposites were prepared using the ion implantation technique. Their optical properties were studied at several wavelengths in the optical range 300-800 nm, across their plasmon resonances. The linear regime was characterized by measuring the absorption spectrum and the third-order nonlinear regime by means of the Z-scan technique using a tunable picosecond pulsed laser system (26 ps). Open-aperture Z-scan traces show a superposition of different optical nonlinear absorption (NLA) processes in the whole range studied. We associate these phenomena with the excitation of inter- and intra-band electronic transitions, which contribute with a positive sign to NLA, and to the formation of hot-electrons, which contribute with opposite sign to NLA. Closed-aperture traces for measuring nonlinear refraction (NLR) show different signs for Au and Ag samples, and a change of sign in Au is found when purely inter-band transitions are excited. In this work, for the appropriate wavelength, it is worth remarking on the free-electron response to the exciting light and its strong contribution to the nonlinear optical properties for low (intra-band) and high (hot-electrons) irradiances.

  16. The contribution of temperament, popularity, and physical appearance to children’s happiness

    Microsoft Academic Search

    Mark D. Holder; Ben Coleman

    2008-01-01

    The relation between the happiness of 9–12 year old children and their temperament, popularity, and physical appearance was\\u000a examined. Participants included 432 children and their parents and teachers. Happiness in children was assessed using a self-rating\\u000a scale, parents’ ratings, teachers’ ratings, and the Happiness and Satisfaction Subscale of the Piers-Harris Children’s Self-Concept\\u000a Scale 2 (Piers-Harris 2) [Piers, E. V., & Herzberg,

  17. Contributions of local knowledge to the physical limnology of Lake Como, Italy

    PubMed Central

    Laborde, Sarah; Imberger, Jörg; Toussaint, Sandy

    2012-01-01

    This article shows how local knowledge may be valuably integrated into a scientific approach in the study of large and complex hydrological systems where data collection at high resolution is a challenge. This claim is supported through a study of the hydrodynamics of a large lake where qualitative data collected from professional fishers was combined with theory to develop a hypothesis that was then verified by numerical modeling. First the fishermen’s narratives were found to describe with accuracy internal wave motions that were evident in water column temperature records, which revealed their practical knowledge of the lake’s hydrodynamics. Second, local knowledge accounts emphasized the recurrent formation of mesoscale gyres and return flows in certain zones of the lake in stratified conditions, which did not appear in the physical data because of limitations of sampling resolution. We hypothesized that these features developed predominantly because of the interaction of wind-driven internal motions with the lake’s bathymetry, and the Earth’s rotation in the widest areas of the basin. Numerical simulation results corroborated the fishers’ descriptions of the flow paths and supported the hypothesis about their formation. We conclude that the collaboration between scientific and local knowledge groups, although an unusual approach for a physical discipline of the geosciences, is worth exploring in the pursuit of a more comprehensive understanding of complex geophysical systems such as large lakes. PMID:22493231

  18. The relative contributions of physical and microbiological factors to cohesive sediment stability

    NASA Astrophysics Data System (ADS)

    Lundkvist, M.; Grue, M.; Friend, P. L.; Flindt, M. R.

    2007-05-01

    The stabilising effects of natural benthic diatom and bacterial assemblages on cohesive sediments were compared with those caused by physico-chemical binding alone. Cohesive sediment beds were reconstructed in 4 annular laboratory miniflumes, using sediment collected at 5-6 m water depth from a local fjord. The sediment was left to stabilise (consolidate) for 1, 2, 5 and 10 days, before being fully resuspended in a series of erosion experiments. The flumes were aerated and subjected to different light/dark conditions; antibiotics were used to isolate diatom from bacteria effects. During consolidation, a constant current velocity was maintained, at a speed well below erosion threshold. 'Natural' sediment regained 27% of its original stability after 1 day, and 85% after 5 days. Complete 'natural' sediment stability was regained within 10 days. Benthic diatoms (mainly Nitzchia sp., Gyrosigma sp. and Pennales sp.) were responsible for about 80% of the biostabilisation, whilst bacteria contributed ˜12%, indicating the importance of light as a controlling factor for surface sediment stability. Relative to physico-chemical binding, the increase in erosion threshold induced by benthic diatoms was 120%, and by bacteria 20%. Where the assemblage consisted of both diatoms and bacteria, the increase was 150%, indicating that natural bed values are not a simple summation of the two effects, i.e. diatoms plus bacteria. Using the results, a first generation empirical relationship describing the relative contributions of microbenthic and physico-chemical factors in the development of erosion threshold is presented. Empirical relationships containing biostabilisation coefficients are important for better computer model predictions of sediment transport.

  19. Neuroimaging Techniques: a Conceptual Overview of Physical Principles, Contribution and History

    SciTech Connect

    Minati, Ludovico [Scientific Direction, Istituto Nazionale Neurologico Carlo Besta, via Celoria 11, 20133, Milan (Italy)

    2006-06-08

    This paper is meant to provide a brief overview of the techniques currently used to image the brain and to study non-invasively its anatomy and function. After a historical summary in the first section, general aspects are outlined in the second section. The subsequent six sections survey, in order, computed tomography (CT), morphological magnetic resonance imaging (MRI), functional magnetic resonance imaging (fMRI), diffusion-tensor magnetic resonance imaging (DWI/DTI), positron emission tomography (PET), and electro- and magneto-encephalography (EEG/MEG) based imaging. Underlying physical principles, modelling and data processing approaches, as well as clinical and research relevance are briefly outlined for each technique. Given the breadth of the scope, there has been no attempt to be comprehensive. The ninth and final section outlines some aspects of active research in neuroimaging.

  20. Solvent contribution to the stability of a physical gel characterized by quasi-elastic neutron scattering

    E-print Network

    Sylvie Spagnoli; Isabelle Morfin; Miguel A. Gonzalez; Pierre Carcabal; Marie Plazanet

    2015-02-05

    The dynamics of a physical gel, namely the Low Molecular Mass Organic Gelator {\\textit Methyl-4,6-O-benzylidene-$\\alpha$ -D-mannopyranoside ($\\alpha$-manno)} in water and toluene are probed by neutron scattering. Using high gelator concentrations, we were able to determine, on a timescale from a few ps to 1 ns, the number of solvent molecules that are immobilised by the rigid network formed by the gelators. We found that only few toluene molecules per gelator participate to the network which is formed by hydrogen bonding between the gelators' sugar moieties. In water, however, the interactions leading to the gel formations are weaker, involving dipolar, hydrophobic or $\\pi-\\pi$ interactions and hydrogen bonds are formed between the gelators and the surrounding water. Therefore, around 10 to 14 water molecules per gelator are immobilised by the presence of the network. This study shows that neutron scattering can give valuable information about the behaviour of solvent confined in a molecular gel.

  1. Contributing Factors Analysis for the Changes of the Gross Motor Function in Children With Spastic Cerebral Palsy After Physical Therapy

    PubMed Central

    Yi, Tae Im; Kim, Sung Heon; Han, Kyung Hee

    2013-01-01

    Objective To investigate the factors which contribute to the improvements of the gross motor function in children with spastic cerebral palsy after physical therapy. Methods The subjects were 45 children with spastic cerebral palsy with no previous botulinum toxin injection or operation history within 6 months. They consisted of 24 males (53.3%) and 21 females (46.7%), and the age of the subjects ranged from 2 to 6 years, with the mean age being 41±18 months. The gross motor function was evaluated by Gross Motor Function Measure (GMFM)-88 at the time of admission and discharge, and then, the subtractions were correlated with associated factors. Results The GMFM-88 was increased by 7.17±3.10 through 52±16 days of physical therapy. The more days of admission, the more improvements of GMFM-88 were attained. The children with initial GMFM-88 values in the middle range showed more improvements in GMFM-88 (p<0.05). The children without dysphagia and children with less spasticity of lower extremities also showed more improvements in GMFM-88 (p<0.05). Conclusion We can predict the improvements of the gross motor function after physical therapy according to the days of admission, initial GMFM-88, dysphagia, and spasticity of lower extremities. Further controlled studies including larger group are necessary. PMID:24236252

  2. REVIEW: The contribution of medical physics to the development of psoralen photochemotherapy (PUVA) in the UK: a personal reminiscence

    NASA Astrophysics Data System (ADS)

    Diffey, Brian

    2006-07-01

    Psoralen photochemotherapy (PUVA) is the combined treatment of skin disorders with a photosensitizing drug (Psoralen) and UltraViolet A radiation. The introduction of PUVA therapy has arguably been the most important development in dermatology over the past 30 years and from the first days of the treatment being introduced in the UK, British medical physicists were an integral part of the effort to establish it. Medical physicists have contributed to this development in a number of ways, from designing irradiation units in the early days of the technique, through to collaborating with dermatologists in prosecuting clinical and experimental studies aimed at improving patient outcomes. That the dose of UVA radiation is administered quantitatively, and not qualitatively, has probably been the single most important contribution made by several medical physicists over this period. However, despite concerns that were expressed almost 30 years ago about the accuracy with which UVA doses are administered to patients, the medical physics community still has some way to go before we can be satisfied that statements about UVA irradiance and dose can be made with confidence.

  3. Contribution of different physical forces to the disjoining pressure of a thin water film being pressed by an oil droplet.

    PubMed

    Kumar, Deepak; Biswas, Sanjay K

    2010-08-01

    With an objective to understand the nature of forces which contribute to the disjoining pressure of a thin water film on a steel substrate being pressed by an oil droplet, two independent sets of experiments were done. (i) A spherical silica probe approaches the three substrates; mica, PTFE and steel, in a 10mM electrolyte solution at two different pHs (3 and 10). (ii) The silica probe with and without a smeared oil film approaches the same three substrates in water (pH=6). The surface potential of the oil film/water was measured using a dynamic light scattering experiment. Assuming the capacity of a substrate for ion exchange the total interaction force for each experiment was estimated to include the Derjaguin-Landau-Verwey-Overbeek (DLVO) force, hydration repulsion, hydrophobic attraction and oil-capillary attraction. The best fit of these estimates to the force-displacement characteristics obtained from the two sets of experiment gives the appropriate surface potentials of the substrates. The procedure allows an assessment of the relevance of a specific physical interaction to an experimental configuration. Two of the principal observations of this work are: (i) The presence of a surface at constant charge, as in the presence of an oil film on the probe, significantly enhances the counterion density over what is achieved when both the surfaces allow ion exchange. This raises the corresponding repulsion barrier greatly. (ii) When the substrate surface is wettable by oil, oil-capillary attraction contributes substantially to the total interaction. If it is not wettable the oil film is deformed and squeezed out. PMID:20447645

  4. FAS1005 : Introduction aux sciences humaines Automne 2013

    E-print Network

    Parrott, Lael

    ses fictions. Freud et L'« humiliation » psychanalytique. Sigmund Freud, L'homme aux loups Recueil (l'humain et ses fictions) 7- 17 octobre : Freud et la Psychanalyse L'homme moderne comme la somme de

  5. Auxin modulates the degradation rate of Aux\\/IAA proteins

    Microsoft Academic Search

    Nathan Zenser; Amanda Ellsmore; Colin Leasure; Judy Callis

    2001-01-01

    Aux\\/IAA gene family members were first identified by their rapid transcriptional increase in response to auxin. Auxin\\/indole-3-acetic acid protein (Aux\\/IAA) luciferase (LUC) fusions expressed in Arabidopsis under control of a non-auxin-responsive promoter were used to monitor the effect of auxin on protein abundance independent of transcriptional regulation by auxin. After 2 hr in the presence of 1 muM exogenous dichlorophenoxyacetic

  6. RSISTIVIT LECTRIQUE DU BISMUTH IRRADI AUX NEUTRONS RAPIDES

    E-print Network

    Paris-Sud XI, Université de

    L-247 R�SISTIVIT� �LECTRIQUE DU BISMUTH IRRADI� AUX NEUTRONS RAPIDES G. QUELARD Section d'Etude des Solides Irradiés, C.E.N., 92260 Fontenay-aux-Roses, France Résumé. 2014 Nous avons irradié du bismuth, à damage in bismuth, at 20 K has been studied by means of electrical resistivity. Results are independent

  7. Optimizing the physical contribution to the sensitivity and signal to noise ratio of extraordinary magnetoresistance quantum well structures

    NASA Astrophysics Data System (ADS)

    Shao, Y.; Solin, S. A.; Ram-Mohan, L. R.; Yoo, Keon-Ho

    2007-06-01

    For applications to extraordinary magnetoresistance (EMR) quantum well sensor design, the electron areal density n2D, the mobility ?, and the products n3D1/2?2 and n3D1/2?5/2 are key physical parameters to be optimized for enhanced device sensitivity and signal to noise ratio. We model the electron areal density and carrier mobility in a two-dimensional electron gas layer developed in a ?-doped AlInSb /InSb heterostructure. The nonparabolic band structure due to the nature of the small energy band gap of InSb is accounted for. The detailed description of the energy dispersion and the energy dependent effective mass are obtained by the k •P method of band structure calculation. The transport properties are calculated by including contributions of scattering from ionized impurities, the background neutral impurities, the deformation potential acoustic phonons, and the polar optical phonons. We calculate the dependencies of n2D, ?, n3D1/2?2, and n3D1/2?5/2 on temperature, spacer layer thickness, doping density, and the quantum well thickness. This has important implications for EMR sensor design.

  8. Arabidopsis SHR and SCR transcription factors and AUX1 auxin influx carrier control the switch between adventitious rooting and xylogenesis in planta and in in vitro cultured thin cell layers

    PubMed Central

    Della Rovere, F.; Fattorini, L.; D’Angeli, S.; Veloccia, A.; Del Duca, S.; Cai, G.; Falasca, G.; Altamura, M. M.

    2015-01-01

    Background and Aims Adventitious roots (ARs) are essential for vegetative propagation. The Arabidopsis thaliana transcription factors SHORT ROOT (SHR) and SCARECROW (SCR) affect primary/lateral root development, but their involvement in AR formation is uncertain. LAX3 and AUX1 auxin influx carriers contribute to primary/lateral root development. LAX3 expression is regulated by SHR, and LAX3 contributes to AR tip auxin maximum. In contrast, AUX1 involvement in AR development is unknown. Xylogenesis is induced by auxin plus cytokinin as is AR formation, but the genes involved are largely unknown. Stem thin cell layers (TCLs) form ARs and undergo xylogenesis under the same auxin plus cytokinin input. The aim of this research was to investigate SHR, SCR, AUX1 and LAX3 involvement in AR formation and xylogenesis in intact hypocotyls and stem TCLs in arabidopsis. Methods Hypocotyls of scr-1, shr-1, lax3, aux1-21 and lax3/aux1-21 Arabidopsis thaliana null mutant seedlings grown with or without auxin plus cytokinin were examined histologically, as were stem TCLs cultured with auxin plus cytokinin. SCR and AUX1 expression was monitored using pSCR::GFP and AUX1::GUS lines, and LAX3 expression and auxin localization during xylogenesis were monitored by using LAX3::GUS and DR5::GUS lines. Key Results AR formation was inhibited in all mutants, except lax3. SCR was expressed in pericycle anticlinally derived AR-forming cells of intact hypocotyls, and in cell clumps forming AR meristemoids of TCLs. The apex was anomalous in shr and scr ARs. In all mutant hypocotyls, the pericycle divided periclinally to produce xylogenesis. Xylary element maturation was favoured by auxin plus cytokinin in shr and aux1-21. Xylogenesis was enhanced in TCLs, and in aux1-21 and shr in particular. AUX1 was expressed before LAX3, i.e. in the early derivatives leading to either ARs or xylogenesis. Conclusions AR formation and xylogenesis are developmental programmes that are inversely related, but they involve fine-tuning by the same proteins, namely SHR, SCR and AUX1. Pericycle activity is central for the equilibrium between xylary development and AR formation in the hypocotyl, with a role for AUX1 in switching between, and balancing of, the two developmental programmes. PMID:25617411

  9. Soins Aux Brules Apres Un Accident Nucleaire

    PubMed Central

    Bargues, L.; Donat, N.; Jault, P.; Leclerc, T.

    2010-01-01

    Summary Les lésions radiques sont dues le plus souvent à des radio-isotopes utilisés dans l’industrie. L’explosion d’un réacteur nucléaire, les armes nucléaires ou une attaque terroriste constituent un risque d’afflux massif de victimes brûlées. Les radiations ionisantes occasionnent des brûlures thermiques, des syndromes d’irradiation aiguë avec pancytopénie et des signes cutanés retardés. Après une période de latence, des symptômes cutanés apparaissent et leur profondeur est proportionnelle à la dose reçue. Les protocoles habituels de réanimation des brûlés s’appliquent ici. Les soins aux irradiés nécessitent aussi une mesure de l’irradiation et une décontamination par des personnels entraînés. En cas de catastrophe nucléaire, la priorité est d’optimiser les structures existantes et de préserver les moyens pour les patients ayant la plus forte probabilité de survie. Après un accident nucléaire isolé, les difficultés dans les centres de brûlés sont l’évaluation de la profondeur et les techniques chirurgicales de couverture cutanée. La préparation des moyens médicaux et des centres de brûlés est nécessaire pour faire face à la prise en charge de ces brûlures différentes et complexes. PMID:21991218

  10. CdS spray : laboration. Proprits physiques applications aux cellules solaires Cu2S-CdS

    E-print Network

    Paris-Sud XI, Université de

    have realized an apparatus to fabricate CdS thin films by spray. The different studies on physical585 CdS « spray » : élaboration. Propriétés physiques applications aux cellules solaires Cu2S-CdS M au point un appareillage de fabrication de lames de CdS par la méthode de pulvérisa- tion chimique

  11. Long-Term Effects of Witnessing Marital Violence for Women: The Contribution of Childhood Physical and Sexual Abuse

    Microsoft Academic Search

    Margaret M. Feerick; Jeffrey J. Haugaard

    1999-01-01

    A sample of 313 college women completed a questionnaire about experiences with violence in childhood and adulthood and adult adjustment and relationship functioning. Nine percent of the women reported having witnessed some type of physical conflict between their parents. Witnessing marital violence was associated with other family mental health risks, childhood physical and sexual abuse, and adult physical assaults by

  12. The Contribution of Physical Activity and Media Use during Childhood and Adolescence to Adult Women's Body Image

    Microsoft Academic Search

    Amy Slater; Marika Tiggemann

    2006-01-01

    This study aimed to investigate the effects of both past and current physical activity and media use on women's body image. A sample of 144 female undergraduate students completed measures of current physical activity, media use and body image, as well as providing retrospective reports of their physical activity participation and media usage during childhood and adolescence. Regression analyses showed

  13. Chemical composition and geologic history of saline waters in Aux Vases and Cypress Formations, Illinois Basin

    USGS Publications Warehouse

    Demir, I.; Seyler, B.

    1999-01-01

    Seventy-six samples of formation waters were collected from oil wells producing from the Aux Vases or Cypress Formations in the Illinois Basin. Forty core samples of the reservoir rocks were also collected from the two formations. Analyses of the samples indicated that the total dissolved solids content (TDS) of the waters ranged from 43,300 to 151,400 mg/L, far exceeding the 35,400 mg/mL of TDS found in typical seawater. Cl-Br relations suggested that high salinities in the Aux Vases and Cypress formation waters resulted from the evaporation of original seawater and subsequent mixing of the evaporated seawater with concentrated halite solutions. Mixing with the halite solutions increased Na and Cl concentrations and diluted the concentration of other ions in the formation waters. The elemental concentrations were influenced further by diagenetic reactions with silicate and carbonate minerals. Diagenetic signatures revealed by fluid chemistry and rock mineralogy delineated the water-rock interactions that took place in the Aux Vases and Cypress sandstones. Dissolution of K-feldspar released K into the solution, leading to the formation of authigenic illite and mixed-layered illite/smectite. Some Mg was removed from the solution by the formation of authigenic chlorite and dolomite. Dolomitization, calcite recrystallization, and contribution from clay minerals raised Sr levels significantly in the formation waters. The trend of increasing TDS of the saline formation waters with depth can be explained with density stratification. But, it is difficult to explain the combination of the increasing TDS and increasing Ca/Na ratio with depth without invoking the controversial 'ion filtration' mechanism.

  14. Auxin modulates the degradation rate of Aux/IAA proteins.

    PubMed

    Zenser, N; Ellsmore, A; Leasure, C; Callis, J

    2001-09-25

    Aux/IAA gene family members were first identified by their rapid transcriptional increase in response to auxin. Auxin/indole-3-acetic acid protein (Aux/IAA) luciferase (LUC) fusions expressed in Arabidopsis under control of a non-auxin-responsive promoter were used to monitor the effect of auxin on protein abundance independent of transcriptional regulation by auxin. After 2 hr in the presence of 1 microM exogenous dichlorophenoxyacetic acid (2,4D), a synthetic auxin, the levels of pea IAA6 (PSIAA6) and Arabidopsis IAA1 LUC activity were 35% and 67%, respectively, of mock-treated genetically identical seedlings, whereas the activity of LUC alone from equivalently treated seedlings remained unaltered. The steady-state level of an Aux/IAA fusion protein lacking domain II, one of the conserved domains found in all Aux/IAA proteins, was not reduced in the presence of auxin. Higher levels of exogenous auxin were required to affect the steady-state level of the PSIAA6LUC fusion with a point mutation in domain II. A 13-aa consensus sequence from domain II fused to LUC created an auxin-responsive fusion protein. The change in steady-state levels in response to auxin is extremely rapid, with a decrease in LUC activity detectable by 2 min after auxin application. Direct half-life measurements show that the decrease caused by exogenous auxin is due to the decrease in fusion protein half-life. These results suggest that auxin rapidly modulates the degradation rate of Aux/IAA proteins, with higher levels of auxin increasing the proteolytic rate of Aux/IAA family members. PMID:11573012

  15. "An Affirmation of the Abilities of Woman": Women's Contributions to the American Academy of Kinesiology and Physical Education

    ERIC Educational Resources Information Center

    Park, Roberta J.

    2006-01-01

    Women attained leadership roles within the American Physical Education Association much earlier than in organizations like the American Medical Association and the American Physiological Society. Women also were members of the American Academy of Physical Education before its official founding in 1930. Archival records and responses by current…

  16. Contrasting Modes of Diversification in the Aux/IAA and ARF Gene Families1[w

    E-print Network

    Remington, David

    Contrasting Modes of Diversification in the Aux/IAA and ARF Gene Families1[w] David L. Remington families in plants. The Aux/IAA and ARF gene families, consisting of 29 and 23 loci in Arabidopsis morphological development. We developed scenarios for the genomic proliferation of the Aux/IAA and ARF families

  17. Christian HOTTIN Les monuments commmoratifs ddis aux savants -1999 LES MONUMENTS COMMEMORATIFS

    E-print Network

    Paris-Sud XI, Université de

    Christian HOTTIN ­ Les monuments commémoratifs dédiés aux savants - 1999 1 LES MONUMENTS COMMEMORATIFS DEDIES AUX UNIVERSITAIRES ET AUX SAVANTS : ENTRE ESPACE COMMUNAUTAIRE ET ESPACE PUBLIC Christian.hottin@culture.gouv.fr INTRODUCTION Tout autant que les hommes politiques ou les gens de lettres, les universitaires et les savants

  18. The Contribution of Former Work-Related Activity Levels to Predict Physical Activity and Sedentary Time during Early Retirement: Moderating Role of Educational Level and Physical Functioning

    PubMed Central

    Van Dyck, Delfien; Cardon, Greet; Deforche, Benedicte; De Bourdeaudhuij, Ilse

    2015-01-01

    Background The transition to retirement introduces a decline in total physical activity and an increase in TV viewing time. Nonetheless, as more time becomes available, early retirement is an ideal stage to implement health interventions. Therefore, knowledge on specific determinants of physical activity and sedentary time is needed. Former work-related physical activity has been proposed as a potential determinant, but concrete evidence is lacking. The aim of this study was to examine if former work-related sitting, standing, walking or vigorous activities predict physical activity and sedentary time during early retirement. Additionally, moderating effects of educational level and physical functioning were examined. Methods In total, 392 recently retired Belgian adults (>6 months, <5 years) completed the International Physical Activity Questionnaire, the SF-36 Health Survey and a questionnaire on sociodemographics and former work-related activities. Generalized linear regression analyses were conducted in R. Moderating effects were examined by adding cross-products to the models. Results More former work-related sitting was predictive of more screen time during retirement. Lower levels of former work-related vigorous activities and higher levels of former work-related walking were associated with respectively more cycling for transport and more walking for transport during retirement. None of the predictors significantly explained passive transportation, cycling and walking for recreation, and leisure-time moderate-to-vigorous physical activity during retirement. Several moderating effects were found, but the direction of the interactions was not univocal. Conclusions Former-work related behaviors are of limited importance to explain physical activity during early retirement, so future studies should focus on other individual, social and environmental determinants. Nonetheless, adults who previously had a sedentary job had higher levels of screen time during retirement, so this is an important subgroup to focus on during interventions. Because of the inconsistent moderating effects of educational level and physical functioning, no clear recommendations can be formulated. PMID:25826218

  19. Pathologie vgtale Sensibilit aux Pythium et mauvaise germination

    E-print Network

    Paris-Sud XI, Université de

    Pathologie végétale Sensibilité aux Pythium et mauvaise germination en sol froid chez le haricot et de composés azotés en cours de germination, leurs téguments sont moins riches en leuco qualités de la variété Vernandon. haricot = Phaseolus vulgaris / germination / sol froid / Pythium Summary

  20. , INRAAdaptation des Herbivores aux Theix 63122 Saint-Gens-Champanelle

    E-print Network

    Paris-Sud XI, Université de

    B. DUMONT , INRAAdaptation des Herbivores aux Milieux Theix 63122 Saint-Genès-Champanelle Déterminisme des choix alimentaires des herbivores au pâturage : principales théories Comment mieux gérer les zones agricoles en déprise ? Comment les herbivores peuvent-ils contribuer à entretenir ces espaces

  1. Bienvenue aux gays du monde entier . Tourisme gay et mondialisation

    E-print Network

    Paris-Sud XI, Université de

    - 1 - « Bienvenue aux gays du monde entier ». Tourisme gay et mondialisation Emmanuel JAURAND-94010 CRETEIL Résumé Le tourisme gay est le tourisme identitaire et communautaire des homosexuels rapport à la globalisation, le tourisme gay peut apparaître paradoxal. Il repose en partie sur des

  2. Plant embryogenesis requires AUX/LAX-mediated auxin influx.

    PubMed

    Robert, Hélène S; Grunewald, Wim; Sauer, Michael; Cannoot, Bernard; Soriano, Mercedes; Swarup, Ranjan; Weijers, Dolf; Bennett, Malcolm; Boutilier, Kim; Friml, Ji?í

    2015-02-15

    The plant hormone auxin and its directional transport are known to play a crucial role in defining the embryonic axis and subsequent development of the body plan. Although the role of PIN auxin efflux transporters has been clearly assigned during embryonic shoot and root specification, the role of the auxin influx carriers AUX1 and LIKE-AUX1 (LAX) proteins is not well established. Here, we used chemical and genetic tools on Brassica napus microspore-derived embryos and Arabidopsis thaliana zygotic embryos, and demonstrate that AUX1, LAX1 and LAX2 are required for both shoot and root pole formation, in concert with PIN efflux carriers. Furthermore, we uncovered a positive-feedback loop between MONOPTEROS (ARF5)-dependent auxin signalling and auxin transport. This MONOPTEROS-dependent transcriptional regulation of auxin influx (AUX1, LAX1 and LAX2) and auxin efflux (PIN1 and PIN4) carriers by MONOPTEROS helps to maintain proper auxin transport to the root tip. These results indicate that auxin-dependent cell specification during embryo development requires balanced auxin transport involving both influx and efflux mechanisms, and that this transport is maintained by a positive transcriptional feedback on auxin signalling. PMID:25617434

  3. Analyse des donnes fonctionnelles Une petite introduction aux SVM

    E-print Network

    Villa-vialaneix, Nathalie

    Analyse des données fonctionnelles Une petite introduction aux SVM SVM pour données fonctionnelles References Analyse de données fonctionnelles par Machines à Vecteurs de Support (SVM) Nathalie Villa Nathalie Villa SVM fonctionnels, Séminaire CANSO, Limoges #12;Analyse des données fonctionnelles Une petite

  4. Scaling up of physical activity interventions in Brazil: how partnerships and research evidence contributed to policy action

    PubMed Central

    Hoehner, Christine M.; Hallal, Pedro C.; Reis, Rodrigo S.; Simoes, Eduardo J.; Malta, Deborah C.; Pratt, Michael; Brownson, Ross C.

    2013-01-01

    The global health burden due to physical inactivity is enormous and growing. There is a need to consider new ways of generating evidence and to identify the role of government in promoting physical activity at the population level. In this paper, we summarize key findings from a large-scale cross-national collaboration to understand physical activity promotion in Brazil. We describe the main aspects of the partnership of Project GUIA (Guide for Useful Interventions for Activity in Brazil and Latin America) that sustained the collaborative effort for eight years and describe how the evidence gathered from the collaboration triggered political action in Brazil to scale up a physical activity intervention at the national level. Project GUIA is a cross-national multidisciplinary research partnership designed to understand and evaluate current efforts for physical activity promotion at the community level in Latin America. This example of scaling up is unprecedented for promoting health in the region and is an example that must be followed and evaluated. PMID:24323944

  5. Predicting Long-Term Outcomes for Women Physically Abused in Childhood: Contribution of Abuse Severity versus Family Environment

    ERIC Educational Resources Information Center

    Griffin, Margaret L.; Amodeo, Maryann

    2010-01-01

    Objective: Child physical abuse (CPA) has been associated with adverse adult psychosocial outcomes, although some reports describe minimal long-term effects. The search for the explanation for heterogeneous outcomes in women with CPA has led to an examination of a range of CPA-related factors, from the severity of CPA incidents to the childhood…

  6. COMMUNICATION Des fivres rcurrentes hrditaires aux syndromes

    E-print Network

    Boyer, Edmond

    fever. Genetic diseases, inborn. Autoimmune diseases. Cloning, molecular. Genetic screening Marc DELPECH to autoinflammatory syn- dromes : the contribution of genetics Key-words (Index medicus) : Familial mediterranean impliqués a conduit à une modification de la nosologie et on sait aussi maintenant qu'il en existe d

  7. Distinct contributions of adverse childhood experiences and resilience resources: a cohort analysis of adult physical and mental health.

    PubMed

    Logan-Greene, Patricia; Green, Sara; Nurius, Paula S; Longhi, Dario

    2014-01-01

    Although evidence is rapidly amassing as to the damaging potential of early life adversities on physical and mental health, as yet few investigations provide comparative snapshots of these patterns across adulthood. This population-based study addresses this gap, examining the relationship of adverse childhood experiences (ACEs) to physical and mental health within a representative sample (n = 19,333) of adults, comparing the prevalence and explanatory strength of ACEs among four birth cohorts spanning ages 18-79. This assessment accounts for demographic and socioeconomic factors, as well as both direct and moderating effects of resilience resources (social/emotional support, life satisfaction, and sleep quality). Findings demonstrate (1) increasing trends of reported ACEs across younger cohorts, including time period shifts such as more prevalent family incarceration, substance abuse, and divorce, (2) significant bivariate as well as independent associations of ACEs with poor health within every cohort, controlling for multiple covariates (increasing trends in older age for physical health), and (3) robust patterns wherein resilience resources moderated ACEs, indicating buffering pathways that sustained into old age. Theoretical and practice implications for health professionals are discussed. PMID:25255340

  8. Distinct Contributions of Adverse Childhood Experiences and Resilience Resources: A Cohort Analysis of Adult Physical and Mental Health

    PubMed Central

    Logan-Greene, Patricia; Green, Sara; Nurius, Paula S.; Longhi, Dario

    2014-01-01

    Although evidence is rapidly amassing as to the damaging potential of early life adversities on physical and mental health, as yet few investigations provide comparative snapshots of these patterns across adulthood. This population-based study addresses this gap, examining the relationship of adverse childhood experiences (ACEs) to physical and mental health within a representative sample (n = 19,333) of adults, comparing the prevalence and explanatory strength of ACEs among four birth cohorts spanning ages 18–79. This assessment accounts for demographic and socioeconomic factors, as well as both direct and moderating effects of resilience resources (social/emotional support, life satisfaction, and sleep quality). Findings demonstrate (1) increasing trends of reported ACEs across younger cohorts, including time period shifts such as more prevalent family incarceration, substance abuse, and divorce, (2) significant bivariate as well as independent associations of ACEs with poor health within every cohort, controlling for multiple covariates (increasing trends in older age for physical health), and (3) robust patterns wherein resilience resources moderated ACEs, indicating buffering pathways that sustained into old age. Theoretical and practice implications for health professionals are discussed. PMID:25255340

  9. The contribution of Maria Sklodowska-Curie and Pierre Curie to Nuclear and Medical Physics. A hundred and ten years after the discovery of radium.

    PubMed

    Diamantis, Aristidis; Magiorkinis, Emmanouil; Papadimitriou, Athanasios; Androutsos, Georgios

    2008-01-01

    This review aims to commemorate the life, and the accomplishments of Pierre and Marie Curie in Physics and in Medicine. Although they are primarily known for their discoveries of the elements of radium and polonium, which took place two years after the discovery of radioactivity by Henry Becquerel, Pierre's discovery of the piezo-electric phenomenon, his research on crystal symmetry, magnetism and paramagnetic substances, are equally important. With the discovery of the two radioactive elements, Pierre and Marie Curie established the new field of Nuclear Physics. It is not an over-statement to say that their discovery contributed much to our modern way of life. Marie received the Nobel Prize twice and later she became the first woman to become member of the French Academy of Sciences. Today, both Pierre and Marie Curie rest in Panthéon, in Paris. PMID:18392225

  10. Contribution of J-Multiplet Levels to the Physical Properties of EuPd3 with the Trivalent Electronic State

    NASA Astrophysics Data System (ADS)

    Takeuchi, Tetsuya; Nakamura, Ai; Hedo, Masato; Nakama, Takao; ?nuki, Yoshichika

    2014-11-01

    EuPd3 is one of the few Eu intermetallic compounds with the trivalent electronic state of the Eu ion. We succeeded in growing single crystals of EuPd3 by the Bridgeman method, and studied the electronic, thermal, and magnetic properties by measuring the electrical resistivity, specific heat, thermal expansion, magnetic susceptibility, and magnetization. The observed temperature dependences of the magnetic susceptibility in the temperature range between 2 and 800 K and of specific heat up to 150 K are analyzed by considering the contribution of the J-multiplet levels 7FJ with J = 0–6. Since the ground-state J-multiplet 7F0 is a singlet for the trivalent Eu ion, the magnetic susceptibility is due mainly to the mixing of the excited J-multiplet levels to the ground state by applying a magnetic field. The observed magnetic susceptibility can be explained by considering the mixing of the J-multiplet levels with J = 0–4. In addition, the specific heat data are well analyzed using the same J-multiplet levels with J = 0–2, showing a large specific heat contribution due to the J-multiplet levels even below room temperature. The excited levels with larger J values are located at much higher energies than the present experimental temperature range and irrelevant to the analyses.

  11. Early results of the LHCf experiment and their contribution to ultra-high-energy cosmic ray physics

    NASA Astrophysics Data System (ADS)

    Adriani, O.; Bonechi, L.; Bongi, M.; Castellini, G.; D'Alessandro, R.; Faus, A.; Fukatsu, K.; Haguenauer, M.; Itow, Y.; Kasahara, K.; Macina, D.; Mase, T.; Masuda, K.; Matsubara, Y.; Menjo, H.; Mitsuka, G.; Muraki, Yasushi; Nakai, M.; Noda, K.; Papini, P.; Perrot, A.-L.; Ricciarini, S.; Sako, T.; Suzuki, K.; Suzuki, T.; Shimizu, Y.; Taki, K.; Tamura, T.; Torii, S.; Tricomi, A.; Velasco, J.; Turner, W. C.; Yoshida, K.; LHCf Collaboration

    2011-03-01

    LHCf is an experiment dedicated to the measurement of neutral particles emitted in the very forward region of LHC collisions. The physics goal is to provide data for calibrating hadron interaction models that are used in the study of Extremely High-Energy Cosmic-Rays. The LHCf experiment acquired data from April to July 2010 during commissioning time of LHC operations at low luminosity. Production spectra of photons and neutrons emitted in the very forward region ($\\eta>$ 8.4) have been obtained. In this paper preliminary results of the photon spectra taken at $\\sqrt{s}$ = 7TeV are reported.

  12. Early results of the LHCf Experiment and their contribution to Ultra-High-Energy Cosmic Ray Physics

    E-print Network

    Adriani, O; Bongi, M; Castellini, G; D'Alessandro, R; Faus, A; Fukatsu, K; Haguenauer, M; Itow, Y; Kasahara, K; Macina, D; Mase, T; Masuda, K; Matsubara, Y; Menjo, H; Mitsuka, G; Muraki, Y; Nakai, M; Noda, K; Papini, P; Perrot, A L; Ricciarini, S; Sako, T; Suzuki, K; Suzuki, T; Shimizu, Y; Taki, K; Tamura, T; Torii, S; Tricomi, A; Velasco, J; Turner, W C; Yoshida, K

    2011-01-01

    LHCf is an experiment dedicated to the measurement of neutral particles emitted in the very forward region of LHC collisions. The physics goal is to provide data for calibrating hadron interaction models that are used in the study of Extremely High-Energy Cosmic-Rays. The LHCf experiment acquired data from April to July 2010 during commissioning time of LHC operations at low luminosity. Production spectra of photons and neutrons emitted in the very forward region ($\\eta>$ 8.4) have been obtained. In this paper preliminary results of the photon spectra taken at $\\sqrt{s}$ = 7TeV are reported.

  13. Protein-Protein Interactions among the Aux\\/IAA Proteins

    Microsoft Academic Search

    Jungmook Kim; Klaus Harter; Athanasios Theologis

    1997-01-01

    The plant hormone indoleacetic acid (IAA) transcriptionally activates early genes in plants. The Aux\\/IAA family of early genes encodes proteins that are short-lived and nuclear-localized. They also contain a putative prokaryotic beta alpha alpha DNA binding motif whose formation requires protein dimerization. Here, we show that the pea PS-IAA4 and Arabidopsis IAA1 and IAA2 proteins perform homo- and heterotypic interactions

  14. I -INTRODUCTION AUX STATISTIQUES J-P. Croisille

    E-print Network

    Croisille, Jean-Pierre

    I - INTRODUCTION AUX STATISTIQUES J-P. Croisille Universit´e de Lorraine UEL - Ann´ee 2012/2013 Jean-Pierre CROISILLE - Laboratoire LMAM UEL: L'influence des math´ematiques sur la soci´et´e #12´ees/multivari´ees Jean-Pierre CROISILLE - Laboratoire LMAM UEL: L'influence des math´ematiques sur la soci´et´e #12;Donn

  15. APPLICATION DES PALIERS A GAZ AUX GYROSCOPES Par G. GOBERT,

    E-print Network

    Paris-Sud XI, Université de

    43 APPLICATION DES PALIERS A GAZ AUX GYROSCOPES Par G. GOBERT, Centre d'�tudes Nucléaires de Saclay gyroscope dont le rotor de 4 cm de diamètre pesant plusieurs centaines de grammes tourne à une vitesse to the construction of a gyroscope. The rotor is 4 cm in diameter and runs at 180 000 r. p. m. Its weight is 500 g. LE

  16. AUX\\/IAA Proteins Are Active Repressors, and Their Stability and Activity Are Modulated by Auxin

    Microsoft Academic Search

    Shiv B. Tiwari; Xiao-Jun Wang; Gretchen Hagen; Tom J. Guilfoyle

    2001-01-01

    Aux\\/IAA genes are early auxin response genes that encode short-lived nuclear proteins with four conserved domains, referred to as I, II, III, and IV. Arabidopsis Aux\\/IAA proteins repressed transcription on auxin-responsive reporter genes in protoplast transfection assays. Mutations in domain II resulted in increased repression, whereas mutations in do- mains I and III partially relieved repression. Aux\\/IAA proteins fused to

  17. Auxin regulates SCFTIR1-dependent degradation of AUX\\/IAA proteins

    Microsoft Academic Search

    William M. Gray; Stefan Kepinski; Dean Rouse; Ottoline Leyser; Mark Estelle

    2001-01-01

    The plant hormone auxin is central in many aspects of plant development. Previous studies have implicated the ubiquitin-ligase SCFTIR1 and the AUX\\/IAA proteins in auxin response. Dominant mutations in several AUX\\/IAA genes confer pleiotropic auxin-related phenotypes, whereas recessive mutations affecting the function of SCFTIR1 decrease auxin response. Here we show that SCFTIR1 is required for AUX\\/IAA degradation. We demonstrate that

  18. Behavioral responses to orexin, orexin receptor gene expression, and spontaneous physical activity contribute to individual sensitivity to obesity

    PubMed Central

    Boland, Kelsey; Teske, Jennifer A.; Billington, Charles; Kotz, Catherine M.

    2012-01-01

    There is significant variability in diet-induced obesity (DIO) among humans and rodents, which has been associated with differences in intrinsic spontaneous physical activity (SPA). The orexin neuropeptides positively modulate SPA through multiple brain sites, but the effects of DIO on orexin's activity are not well understood. In this study, we tested the hypothesis that DIO sensitivity is mediated by decreased SPA and changes in the function of the orexins. As a DIO model, we used male Sprague-Dawley rats fed a high-fat (HF; 45% kcal from fat) or a low-fat (LF; 10% kcal from fat) diet for 10 wk. We measured SPA before and after HF or LF feeding and expression of orexin receptors by real-time PCR after dietary treatments. We tested DIO effects on orexin signaling by measuring SPA after injection of orexin A in the rostral lateral hypothalamus (RLH) before and after 10 wk of HF feeding. Finally, we tested whether daily orexin A RLH injections prevent DIO caused by HF feeding. Our results show that resistance to DIO is associated with an increase in SPA, SPA after injection of orexin A in RLH, and orexin receptor expression in sites that mediate orexin's effect on SPA, including RLH. We show that daily injections of orexin peptide in RLH prevent DIO without altering food intake. We estimate that the energetic cost of SPA after orexin A RLH injection accounts for approximately 61% of the extra caloric intake associated with HF intake, suggesting additional effects of orexins. In summary, our results suggest that variability in DIO sensitivity is mediated through adaptations in the activity of the orexin peptides and their receptors. PMID:22829584

  19. Expression and regulation of the early auxin-responsive Aux/IAA genes during strawberry fruit development.

    PubMed

    Liu, Du-juan; Chen, Jian-ye; Lu, Wang-jin

    2011-02-01

    The plant hormone auxin transcriptionally activates Aux/IAA genes. Auxin plays an important role in regulating fruit growth and ripening of strawberry and Aux/IAA genes have been extensively studied in Arabidopsis, rice and tomato, but little information is available on strawberry fruit. In the present work, two full-length of early auxin-responsive Aux/IAA genes, termed FaAux/IAA1 and FaAux/IAA2 respectively, were isolated and characterized from strawberry fruit. Moreover, the expression profiles of two FaAux/IAA genes during fruit development, and the effect of naphthalene acetic acid (NAA) on their expressions of fruits at two different developmental stages were also investigated. The results showed that the levels of FaAux/IAA1 and FaAux/IAA2 transcripts were very high at early stage of fruit development, and decreased sharply at ripening stage (after white stage). In addition, NAA applied at the stage of large green and white fruit obviously increased the accumulations of FaAux/IAA1 and FaAux/IAA2 transcripts. These data suggested that the expressions of both FaAux/IAA1 and FaAux/IAA2 genes were likely to be involved in early fruit development, and the enhancement of FaAux/IAAs transcripts might be attributed at least or partially to auxin-induced fruit growth and delayed fruit ripening of strawberry. PMID:20563652

  20. The contribution of lifestyle coaching of overweight patients in primary care to more autonomous motivation for physical activity and healthy dietary behaviour: results of a longitudinal study

    PubMed Central

    2014-01-01

    Background Combined lifestyle interventions (CLIs) have been advocated as an effective instrument in efforts to reduce overweight and obesity. The odds of maintaining higher levels of physical activity (PA) and healthier dietary behaviour improve when people are more intrinsically motivated to change their behaviour. To promote the shift towards more autonomous types of motivation, facilitator led CLIs have been developed including lifestyle coaching as key element. The present study examined the shift in types of motivation to increase PA and healthy dieting among participants of a primary care CLI, and the contribution of lifestyle coaching to potential changes in motivational quality. Methods This prospective cohort study included participants of 29 general practices in the Netherlands that implemented a CLI named ‘BeweegKuur’. Questionnaires including items on demographics, lifestyle coaching and motivation were sent at baseline and after 4 months. Aspects of motivation were assessed with the Behavioural Regulation and Exercise Questionnaire (BREQ-2) and the Regulation of Eating Behaviour Questionnaire (REBS). We performed a drop out analysis to identify selective drop-out. Changes in motivation were analysed with t-tests and effect size interpretations (Cohen’s d), and multivariate regression analysis was used to identify predictors of motivational change. Results For physical activity, changes in motivational regulation were fully in line with the tenets of Self Determination Theory and Motivational Interviewing: participants made a shift towards a more autonomous type of motivation (i.e. controlled types of motivation decreased and autonomous types increased). Moreover, an autonomy supportive coaching style was generally found to predict a larger shift in autonomous types of motivation. For healthy dietary behaviour, however, except for a small decrease in external motivation, no favourable changes in different types of motivation were observed. The relation between coaching and motivation appeared to be influenced by the presence of physical activity guidance in the programme. Conclusions Motivation of participants of a real life primary care CLI had changed towards a more autonomous motivation after 4 months of intervention. Autonomy-supportive lifestyle coaching contributed to this change with respect to physical activity. Lifestyle coaching for healthy diet requires thorough knowledge about the problem of unhealthy dieting and solid coaching skills. PMID:25027848

  1. Paternité des articles et intérêts concurrents : une analyse des recommandations aux auteurs des journaux traitant de pratique pharmaceutique

    PubMed Central

    Courbon, Ève; Tanguay, Cynthia; Lebel, Denis; Bussières, Jean-François

    2014-01-01

    RÉSUMÉ Contexte : La présence d’auteurs honorifiques et fantômes ainsi que les intérêts concurrents représentent des difficultés bien documentées, liées à la publication d’articles scientifiques. Il existe des lignes directrices encadrant la rédaction et la publication de manuscrits scientifiques, notamment celles de l’International Committee of Medical Journal Editors (ICMJE). Objectifs : L’objectif principal de cette étude descriptive et transversale visait à recenser les instructions portant sur la paternité des articles et les intérêts concurrents provenant des recommandations aux auteurs des journaux traitant de pratique pharmaceutique. L’objectif secondaire visait à déterminer des mesures correctrices pour une paternité des articles plus transparente. Méthode : La recherche a débuté par l’identification des journaux traitant de pratique pharmaceutique. La consultation des instructions aux auteurs des journaux a permis ensuite de recenser les recommandations destinées à éviter les problèmes de paternité des articles et d’intérêts concurrents. Finalement, les membres de l’équipe de recherche se sont consultés afin de définir des mesures correctrices possibles à l’intention des chercheurs. Résultats : Des 232 journaux traitant de pharmacie, 33 ont été définis comme traitant de pratique pharmaceutique. Un total de 24 (73 %) journaux mentionnaient suivre la politique de l’ICMJE, 14 (42 %) demandaient aux auteurs de remplir un formulaire de déclaration d’intérêts concurrents au moment de la soumission de l’article, 17 (52 %) présentaient une définition de la qualité d’auteur et 5 (15 %) demandaient de détailler les contributions de chaque auteur. Une grille de 40 critères a été élaborée pour définir l’attribution du statut d’auteur. Conclusion : Moins de la moitié des journaux demandait aux auteurs de transmettre un formulaire de déclaration des intérêts concurrents au moment de la soumission d’un article et seulement la moitié des journaux avait donné une définition de la qualité d’auteur. La publication scientifique de travaux sur les pratiques pharmaceutiques n’est pas à l’abri des manques de transparence liés à la publication. L’utilisation d’une grille décrivant la contribution de chaque auteur et la publication en ligne des travaux peuvent contribuer à limiter ces risques. PMID:24970938

  2. Physics

    NASA Astrophysics Data System (ADS)

    Bromley, D. A.

    1980-07-01

    Nuclear, plasma, elementary particle, and atomic and molecular physics are surveyed along with the physics of condensed matter and relativistic astrophysics. Attention is given to the discovery of quarks, psi particles, bosons and nuclear quantum states, the role of group theory and the search for a unified field theory. Also considered are magnetic and inertial confinement regarding fusion power, and the use of tunable lasers and microwave spectroscopy to study Rydberg states. In addition, surface physics, amorphous solids, superfluidity and gravitational collapse are discussed.

  3. Des furoncles résistants aux antibiotiques: penser à la myiase !!

    PubMed Central

    Ajili, Faida; Abid, Rim; Bousseta, Najeh; Mrabet, Ali; Karoui, Ghazi; Louzir, Bassem; Battikh, Riadh; Othmani, Salah

    2013-01-01

    Les myiases sont des infections parasitaires par des larves de mouches. La localisation cutanée doit être évoquée de retour d'un pays tropical devant une évolution inhabituelle de lésions cutanées. Nous rapportons une observation d'un militaire tunisien, ayant séjourné en République Démocratique du Congo. Il était atteint de myiase cutanée simulatrice d'une furonculose résistante aux antibiotiques. L'intérêt de cette observation est de souligner l'importance d’évoquer la myiase dont le traitement est simple et rapide chez un patient de retour de zone d'endémie. PMID:24106569

  4. Physics

    NSDL National Science Digital Library

    K-12 Outreach,

    Physics is the scientific study of the basic principles of the universe, including matter, energy, motion and force, and their interactions. Major topics include classical mechanics, thermodynamics, light and optics, electromagnetism and relativity.

  5. Structure-Function Analysis of the Presumptive Arabidopsis Auxin Permease AUX1

    Microsoft Academic Search

    Ranjan Swarup; Joanna Kargul; Alan Marchant; Daniel Zadik; Abidur Rahman; Rebecca Mills; Anthony Yemm; Lorraine Williams; Paul Millner; Seiji Tsurumi; Ian Moore; Richard Napier; Ian D. Kerr; Malcolm J. Bennetta

    2004-01-01

    We have investigated the subcellular localization, the domain topology, and the amino acid residues that are critical for the function of the presumptive Arabidopsis thaliana auxin influx carrier AUX1. Biochemical fractionation experiments and confocal studies using an N-terminal yellow fluorescent protein (YFP) fusion observed that AUX1 colocalized with plasma membrane (PM) markers. Because of its PM localization, we were able

  6. Structure-Function Analysis of the Presumptive Arabidopsis Auxin Permease AUX1W?

    PubMed Central

    Swarup, Ranjan; Kargul, Joanna; Marchant, Alan; Zadik, Daniel; Rahman, Abidur; Mills, Rebecca; Yemm, Anthony; May, Sean; Williams, Lorraine; Millner, Paul; Tsurumi, Seiji; Moore, Ian; Napier, Richard; Kerr, Ian D.; Bennett, Malcolm J.

    2004-01-01

    We have investigated the subcellular localization, the domain topology, and the amino acid residues that are critical for the function of the presumptive Arabidopsis thaliana auxin influx carrier AUX1. Biochemical fractionation experiments and confocal studies using an N-terminal yellow fluorescent protein (YFP) fusion observed that AUX1 colocalized with plasma membrane (PM) markers. Because of its PM localization, we were able to take advantage of the steep pH gradient that exists across the plant cell PM to investigate AUX1 topology using YFP as a pH-sensitive probe. The YFP-coding sequence was inserted in selected AUX1 hydrophilic loops to orient surface domains on either apoplastic or cytoplasmic faces of the PM based on the absence or presence of YFP fluorescence, respectively. We were able to demonstrate in conjunction with helix prediction programs that AUX1 represents a polytopic membrane protein composed of 11 transmembrane spanning domains. In parallel, a large aux1 allelic series containing null, partial-loss-of-function, and conditional mutations was characterized to identify the functionally important domains and amino acid residues within the AUX1 polypeptide. Whereas almost all partial-loss-of-function and null alleles cluster in the core permease region, the sole conditional allele aux1-7 modifies the function of the external C-terminal domain. PMID:15486104

  7. L'apport d'internet aux Petites Entreprises (PE) touristiques dans la construction de leur

    E-print Network

    Paris-Sud XI, Université de

    RIPME L'apport d'internet aux Petites Entreprises (PE) touristiques dans la construction de leur auteur, publié dans "Revue Internationale PME 26, 1 (2013) xx-xx" #12;L'apport d'internet aux Petites les PE demeure faible (Eurostat 2010) et pourtant parmi les ap- plications IT, internet est pour les

  8. Mesures de correlation robustes aux occultations Correlation measures that are robust near occlusions

    E-print Network

    Paris-Sud XI, Université de

    Mesures de corr´elation robustes aux occultations Correlation measures that are robust near`eme des occultations. Un protocole d'´evaluation est propos´e (huit crit`eres, trois paires d'images synth`eme famille), dont les seize mesures propos´ees, sont les plus robustes aux occultations. Mots Cl´es Corr

  9. WORKING PAPER N 2009 -29 Mise aux normes des filires agro-alimentaires

    E-print Network

    Paris-Sud XI, Université de

    WORKING PAPER N° 2009 - 29 Mise aux normes des filières agro-alimentaires : Leçons de l'expérience internationale Mélise Jaud Codes JEL : F13, O13, Q17, Q18 Mots-clés : Filières agro-alimentaires, normes SPS, PED ­ ÉCOLE NORMALE SUPÉRIEURE halshs-00574965,version1-9Mar2011 #12;Mise aux normes des filières agro

  10. ASSIMILATION DES EXPRIENCES DE HALL ET FARADAY AUX EFFETS DU GYROSCOPE;

    E-print Network

    Paris-Sud XI, Université de

    269 ASSIMILATION DES EXP�RIENCES DE HALL ET FARADAY AUX EFFETS DU GYROSCOPE; PAR 31. B. �LIE. L élémentaires suivant O.x, c'est-à-dire perpendiculaires aux deux premières. Or le gyroscope présente le fait

  11. Aux\\/IAA Proteins Repress Expression of Reporter Genes Containing Natural and Highly Active Synthetic Auxin Response Elements

    Microsoft Academic Search

    Tim Ulmasov; Jane Murfett; Gretchen Hagen; Tom J. Guilfoyle

    1997-01-01

    A highly active synthetic auxin response element (AuxRE), referred to as DR5, was created by petforming site-directed mutations in a natural composite AuxRE found in the soybean GH3 promoter. DR5 consisted of tandem direct repeats of 11 bp that included the auxin-responsive TGTCTC element. The DR5 AuxRE showed greater auxin responsiveness than a natural composite AuxRE and the GH3 promoter

  12. Phenotypes Associated with Down-Regulation of Sl-IAA27 Support Functional Diversity Among Aux/IAA Family

    E-print Network

    Paris-Sud XI, Université de

    Phenotypes Associated with Down-Regulation of Sl-IAA27 Support Functional Diversity Among Aux/IAA auxin is known to regulate several as- pects of plant development, and Aux/IAA transcription fac- tors play a pivotal role in auxin signaling. To extend our understanding of the multiple functions of Aux/IAAs

  13. Conséquences comportementales de la violence faite aux enfants

    PubMed Central

    Al Odhayani, Abdulaziz; Watson, William J.; Watson, Lindsay

    2013-01-01

    Résumé Objectif Discuter des répercussions de la violence sur le développement comportemental durant l’enfance, mettre en évidence certains signes comportementaux susceptibles d’alerter les médecins à la présence d’une maltraitance continue d’un enfant et explorer le rôle précis du médecin de famille dans une telle situation clinique. Sources des données Une recension systématique a servi à examiner la recherche pertinente, les articles de révision clinique et les sites web des organismes de protection de la jeunesse. Message principal Le comportement d’un enfant est une manifestation extériorisée de sa stabilité et de sa sécurité intérieures. C’est une lentille au travers de laquelle le médecin de famille peut observer le développement de l’enfant pendant toute sa vie. Tous les genres de violence sont dommageables pour les enfants, qu’elle soit physique, affective ou psychologique, et peuvent causer des problèmes à long terme dans le développement du comportement et de la santé mentale. Les médecins de famille doivent connaître les indices de maltraitance et de négligence envers les enfants et être aux aguets de ces derniers afin d’entreprendre les interventions appropriées et améliorer les résultats pour ces enfants. Conclusion La violence faite aux enfants peut causer un développement psychologique désordonné et des problèmes de comportement. Les médecins de famille exercent un rôle important dans la reconnaissance des signes comportementaux laissant présager une maltraitance, ainsi que pour offrir de l’aide afin de protéger les enfants.

  14. Climate Change 2013: The Physical Science Basis. An overview of the Working Group 1 contribution to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC)

    NASA Astrophysics Data System (ADS)

    Allen, S. K.; Plattner, G.; Nauels, A.; Xia, Y.; Qin, D.; Stocker, T. F.

    2013-12-01

    Climate change 2013: The Physical Science Basis, is the Working Group I (WGI) contribution to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC). The WGI contribution extends from observations and paleoclimate information regarding past changes in the climate system, a comprehensive evaluation of climate models, the detection and attribution of observed changes to natural or anthropogenic forcing, through to projected future changes on both near-term and long-term time scales. Human influence on the climate system is now detected with increased certainty, both globally and in most regions. Since the mid-20th century, the increase in anthropogenic greenhouse gas concentrations has led to surface warming over almost the entire globe, while at the same time, the ocean has continued to warm and store energy. Satellite based observations reveal with improved precision that summer sea ice extent is declining rapidly in the Arctic, glaciers are retreating world-wide, and global mean sea level continues to rise. Concurrent with a continued increase in atmospheric CO2 concentrations, the oceanic uptake of CO2 has resulted in decreasing pH of seawater since the beginning of the industrial era. Projections of future changes in the climate system to the end of the 21st century are based on a series of new climate models and new scenarios, but are broadly consistent with previous assessment findings, confirming widespread and significant changes across the climate system. Greater warming is projected to occur over land than ocean, with the most rapid warming in the Arctic region. Based on modeled changes in seasonal mean precipitation, the contrast between wet and dry regions, and wet and dry seasons is projected to increase as global temperatures rise. Confidence in projections of global mean sea level rise has increased since the previous IPCC assessment report, and projections now include future rapid ice-sheet dynamical changes. On long time scales, warming is dominated by total emissions of CO2, and many changes will persist for centuries even if CO2 emissions were stopped. In 2014 the Fifth Assessment cycle of the IPCC will be completed following the release of the reports of Working Groups II (impacts, adaptation and vulnerability) and Working Groups III (mitigation of climate change), and finally the combined synthesis product based on all three underlying Working Group assessment reports.

  15. Hormone de croissance placentaire. Signification par rapport aux hormones de croissance et

    E-print Network

    Boyer, Edmond

    Hormone de croissance placentaire. Signification par rapport aux hormones de croissance et. Placentalgrowth hormone. Significance relative to pituitary growth hormo- nes and placental lactogen hormone growth hormone (PGH). This entity, agonist of pituitary GH, appears responsible for the elevated IGFI

  16. Protein-protein interaction and gene co-expression maps of ARFs and Aux/IAAs in Arabidopsis.

    PubMed

    Piya, Sarbottam; Shrestha, Sandesh K; Binder, Brad; Stewart, C Neal; Hewezi, Tarek

    2014-01-01

    The phytohormone auxin regulates nearly all aspects of plant growth and development. Based on the current model in Arabidopsis thaliana, Auxin/indole-3-acetic acid (Aux/IAA) proteins repress auxin-inducible genes by inhibiting auxin response transcription factors (ARFs). Experimental evidence suggests that heterodimerization between Aux/IAA and ARF proteins are related to their unique biological functions. The objective of this study was to generate the Aux/IAA-ARF protein-protein interaction map using full length sequences and locate the interacting protein pairs to specific gene co-expression networks in order to define tissue-specific responses of the Aux/IAA-ARF interactome. Pairwise interactions between 19 ARFs and 29 Aux/IAAs resulted in the identification of 213 specific interactions of which 79 interactions were previously unknown. The incorporation of co-expression profiles with protein-protein interaction data revealed a strong correlation of gene co-expression for 70% of the ARF-Aux/IAA interacting pairs in at least one tissue/organ, indicative of the biological significance of these interactions. Importantly, ARF4-8 and 19, which were found to interact with almost all Aux-Aux/IAA showed broad co-expression relationships with Aux/IAA genes, thus, formed the central hubs of the co-expression network. Our analyses provide new insights into the biological significance of ARF-Aux/IAA associations in the morphogenesis and development of various plant tissues and organs. PMID:25566309

  17. Protein-protein interaction and gene co-expression maps of ARFs and Aux/IAAs in Arabidopsis

    PubMed Central

    Piya, Sarbottam; Shrestha, Sandesh K.; Binder, Brad; Stewart, C. Neal; Hewezi, Tarek

    2014-01-01

    The phytohormone auxin regulates nearly all aspects of plant growth and development. Based on the current model in Arabidopsis thaliana, Auxin/indole-3-acetic acid (Aux/IAA) proteins repress auxin-inducible genes by inhibiting auxin response transcription factors (ARFs). Experimental evidence suggests that heterodimerization between Aux/IAA and ARF proteins are related to their unique biological functions. The objective of this study was to generate the Aux/IAA-ARF protein-protein interaction map using full length sequences and locate the interacting protein pairs to specific gene co-expression networks in order to define tissue-specific responses of the Aux/IAA-ARF interactome. Pairwise interactions between 19 ARFs and 29 Aux/IAAs resulted in the identification of 213 specific interactions of which 79 interactions were previously unknown. The incorporation of co-expression profiles with protein-protein interaction data revealed a strong correlation of gene co-expression for 70% of the ARF-Aux/IAA interacting pairs in at least one tissue/organ, indicative of the biological significance of these interactions. Importantly, ARF4-8 and 19, which were found to interact with almost all Aux-Aux/IAA showed broad co-expression relationships with Aux/IAA genes, thus, formed the central hubs of the co-expression network. Our analyses provide new insights into the biological significance of ARF-Aux/IAA associations in the morphogenesis and development of various plant tissues and organs. PMID:25566309

  18. Observation de chloroplastes rsistants aux triazines chez une panicode, Setaria viridis L.

    E-print Network

    Paris-Sud XI, Université de

    Observation de chloroplastes résistants aux triazines chez une panicoïdée, Setaria viridis L. R�SUM� Mauvaise herbe, Setaria viridis L., Résistance chloroplasti- que, Résistance aux triazines, Détoxication des triazi- nes. Chez une espèce de la tribu des Panicoïdées (Setaria viridis L.) qui métabolise

  19. Yokonolide B, a Novel Inhibitor of Auxin Action, Blocks Degradation of AUX/IAA Factors*S

    E-print Network

    Jones, Alan M.

    Yokonolide B, a Novel Inhibitor of Auxin Action, Blocks Degradation of AUX/IAA Factors*S ReceivedB is to block AUX/IAA protein degradation; how- ever, YkB is not a general proteasome inhibitor. YkB blocks 1. Gain of function mutants such as shy2-2, slr1, and axr2-1 encoding AUX/IAA transcriptional

  20. Auxin-induced SCFTIR1Aux\\/IAA interaction involves stable modification of the SCFTIR1 complex

    Microsoft Academic Search

    Stefan Kepinski; Ottoline Leyser

    2004-01-01

    The plant hormone auxin can regulate gene expression by destabilizing members of the Aux\\/IAA family of transcriptional repressors. Auxin-induced Aux\\/IAA degradation requires the protein-ubiquitin ligase SCFTIR1, with auxin acting to enhance the interaction between the Aux\\/IAAs and SCFTIR1. SKP1, Cullin, and an F-box-containing protein (SCF)-mediated degradation is an important component of many eukaryotic signaling pathways. In all known cases to

  1. Réactions aux interfaces de bicristaux compatibles et incompatibles

    NASA Astrophysics Data System (ADS)

    Taisne, A.; Décamps, B.; Priester, L.

    2003-03-01

    La rupture intergranulaire peut apparaître suite à la non accommodation des contraintes au voisinage de l'interface. La transmission du glissement au travers d'une interface est un des modes de relaxation possible qui dépend des paramètres suivants : facteurs géométriques (caractéristiques de l'interface et systèmes de glissement activés), constantes élastiques de chacune des phases. Dans cette étude, la microscopie électronique à transmission (MET) est utilisée pour analyser les configurations de dislocations résultant d'une déformation par fatigue de bicristaux d'acier austénoferritique de désorientations contrôlées. Deux types de bicristaux sont étudiés, compatible et incompatible plastiquement. Pour chacun d'eux, la déformation est initiée soit dans la phase ferritique ? soit dans la phase austénitique ? selon la localisation d'une entaille préalable à l'essai mécanique. Les résultats permettent de remonter aux mécanismes élémentaires qui régissent le transfert “direct” ou “indirect” des dislocations à travers l'interface. Une corrélation avec le comportement des bicristaux à l'échelle macroscopique est également tentée.

  2. Auxin represses stomatal development in dark-grown seedlings via Aux/IAA proteins.

    PubMed

    Balcerowicz, Martin; Ranjan, Aashish; Rupprecht, Laura; Fiene, Gabriele; Hoecker, Ute

    2014-08-01

    Stomatal development is tightly regulated through internal and external factors that are integrated by a complex signalling network. Light represents an external factor that strongly promotes stomata formation. Here, we show that auxin-resistant aux/iaa mutants, e.g. axr3-1, exhibit a de-repression of stomata differentiation in dark-grown seedlings. The higher stomatal index in dark-grown axr3-1 mutants when compared with the wild type is due to increased cell division in the stomatal lineage. Excessive stomata in dark-grown seedlings were also observed in mutants defective in auxin biosynthesis or auxin perception and in seedlings treated with the polar auxin transport inhibitor NPA. Consistent with these findings, exogenous auxin repressed stomata formation in light-grown seedlings. Taken together, these results indicate that auxin is a negative regulator of stomatal development in dark-grown seedlings. Epistasis analysis revealed that axr3-1 acts genetically upstream of the bHLH transcription factors SPCH, MUTE and FAMA, as well as the YDA MAP kinase cascade, but in parallel with the repressor of photomorphogenesis COP1 and the receptor-like protein TMM. The effect of exogenous auxin required the ER family of leucine-rich repeat receptor-like kinases, suggesting that auxin acts at least in part through the ER family. Expression of axr3-1 in the stomatal lineage was insufficient to alter the stomatal index, implying that cell-cell communication is necessary to mediate the effect of auxin. In summary, our results show that auxin signalling contributes to the suppression of stomatal differentiation observed in dark-grown seedlings. PMID:25063454

  3. Evidence supporting an intentional Neandertal burial at La Chapelle-aux-Saints

    PubMed Central

    Rendu, William; Beauval, Cédric; Crevecoeur, Isabelle; Bayle, Priscilla; Balzeau, Antoine; Bismuth, Thierry; Bourguignon, Laurence; Delfour, Géraldine; Faivre, Jean-Philippe; Lacrampe-Cuyaubère, François; Tavormina, Carlotta; Todisco, Dominique; Turq, Alain; Maureille, Bruno

    2014-01-01

    The bouffia Bonneval at La Chapelle-aux-Saints is well known for the discovery of the first secure Neandertal burial in the early 20th century. However, the intentionality of the burial remains an issue of some debate. Here, we present the results of a 12-y fieldwork project, along with a taphonomic analysis of the human remains, designed to assess the funerary context of the La Chapelle-aux-Saints Neandertal. We have established the anthropogenic nature of the burial pit and underlined the taphonomic evidence of a rapid burial of the body. These multiple lines of evidence support the hypothesis of an intentional burial. Finally, the discovery of skeletal elements belonging to the original La Chapelle aux Saints 1 individual, two additional young individuals, and a second adult in the bouffia Bonneval highlights a more complex site-formation history than previously proposed. PMID:24344286

  4. Evidence supporting an intentional Neandertal burial at La Chapelle-aux-Saints.

    PubMed

    Rendu, William; Beauval, Cédric; Crevecoeur, Isabelle; Bayle, Priscilla; Balzeau, Antoine; Bismuth, Thierry; Bourguignon, Laurence; Delfour, Géraldine; Faivre, Jean-Philippe; Lacrampe-Cuyaubère, François; Tavormina, Carlotta; Todisco, Dominique; Turq, Alain; Maureille, Bruno

    2014-01-01

    The bouffia Bonneval at La Chapelle-aux-Saints is well known for the discovery of the first secure Neandertal burial in the early 20th century. However, the intentionality of the burial remains an issue of some debate. Here, we present the results of a 12-y fieldwork project, along with a taphonomic analysis of the human remains, designed to assess the funerary context of the La Chapelle-aux-Saints Neandertal. We have established the anthropogenic nature of the burial pit and underlined the taphonomic evidence of a rapid burial of the body. These multiple lines of evidence support the hypothesis of an intentional burial. Finally, the discovery of skeletal elements belonging to the original La Chapelle aux Saints 1 individual, two additional young individuals, and a second adult in the bouffia Bonneval highlights a more complex site-formation history than previously proposed. PMID:24344286

  5. Saint-Louis-Eisenthr (Sainte-Marie-aux-Mines, France de l'Est) : sans doute la plus belle mine

    E-print Network

    Paris-Sud XI, Université de

    Saint-Louis-Eisenthür (Sainte-Marie-aux-Mines, France de l'Est) : sans doute la plus belle mine d Sainte-Marie-aux-Mines (Alsace, France), Saint-Louis-Eisenthür, opened to the Public since 1988 : perhaps the finest renaissance Silvermine in Europe The mine Saint-Louis-Eisenthür is located in the Pb

  6. CIEAEM 57 Italie Italy Foire aux ides, Session de Poster Piazza Armerina, Forum of Ideas, Poster Session

    E-print Network

    Spagnolo, Filippo

    CIEAEM 57 ­ Italie ­ Italy Foire aux idées, Session de Poster Piazza Armerina, Forum of Ideas and in higher grades in the mathematical language of functions). #12;CIEAEM 57 ­ Italie ­ Italy Foire aux idées

  7. Subcellular Trafficking of the Arabidopsis Auxin Influx Carrier AUX1 Uses a Novel Pathway Distinct from PIN1[W

    PubMed Central

    Kleine-Vehn, Jürgen; Dhonukshe, Pankaj; Swarup, Ranjan; Bennett, Malcolm; Friml, Ji?í

    2006-01-01

    The directional flow of the plant hormone auxin mediates multiple developmental processes, including patterning and tropisms. Apical and basal plasma membrane localization of AUXIN-RESISTANT1 (AUX1) and PIN-FORMED1 (PIN1) auxin transport components underpins the directionality of intercellular auxin flow in Arabidopsis thaliana roots. Here, we examined the mechanism of polar trafficking of AUX1. Real-time live cell analysis along with subcellular markers revealed that AUX1 resides at the apical plasma membrane of protophloem cells and at highly dynamic subpopulations of Golgi apparatus and endosomes in all cell types. Plasma membrane and intracellular pools of AUX1 are interconnected by actin-dependent constitutive trafficking, which is not sensitive to the vesicle trafficking inhibitor brefeldin A. AUX1 subcellular dynamics are not influenced by the auxin influx inhibitor NOA but are blocked by the auxin efflux inhibitors TIBA and PBA. Furthermore, auxin transport inhibitors and interference with the sterol composition of membranes disrupt polar AUX1 distribution at the plasma membrane. Compared with PIN1 trafficking, AUX1 dynamics display different sensitivities to trafficking inhibitors and are independent of the endosomal trafficking regulator ARF GEF GNOM. Hence, AUX1 uses a novel trafficking pathway in plants that is distinct from PIN trafficking, providing an additional mechanism for the fine regulation of auxin transport. PMID:17114355

  8. ETUDE DE LA COURBE DE BRAGG RELATIVE AUX RAYONS DU RADIUM C' par Mlle IRNE CURIE et M. FRANOIS BEHOUNEK

    E-print Network

    Boyer, Edmond

    ETUDE DE LA COURBE DE BRAGG RELATIVE AUX RAYONS DU RADIUM C' par Mlle IRÈNE CURIE et M. FRANÇOIS BEHOUNEK Sommaire. 2014 On a construit la courbe de Bragg relative aux rayons du RaC' dans l'air avec un'ionisation le long d'un faisceau de rayons x canalisés, dite « courbe de Bragg », a été étudiée par un grand

  9. What can global positioning systems tell us about the contribution of different types of urban greenspace to children’s physical activity?

    PubMed Central

    Lachowycz, Kate; Jones, Andrew P.; Page, Angie S.; Wheeler, Benedict W.; Cooper, Ashley R.

    2013-01-01

    Urban greenspace is hypothesised to be an important location for physical activity in children, but their actual use of the resource to be active is not well known. In this study, global positioning systems (GPS) and accelerometers were used to measure activity within green environments for 902 English children aged 11-12. We summarised activity intensities in different types of greenspace on weekday evenings, weekend days, and by season. Parks were used for as much as 30% of outdoors moderate-vigorous activity at weekends and use was consistent across seasons. The findings suggest the importance of certain types of greenspace to children’s physical activity. PMID:22365385

  10. Aux\\/IAA Proteins Are Phosphorylated by Phytochrome in Vitro1

    Microsoft Academic Search

    Adan Colon-Carmona; Donna L. Chen; Kuo-Chen Yeh; Steffen Abel

    2000-01-01

    Auxin\\/indole-3-acetic acid (Aux\\/IAA) genes encode short-lived transcription factors that are induced as a primary response to the plant growth hormone IAA or auxin. Gain-of-function mutations in Arabidopsis genes, SHY2\\/IAA3, AXR3\\/IAA17, and AXR2\\/IAA7 cause pleiotropic phenotypes consistent with enhanced auxin responses, possibly by increasing Aux\\/IAA protein stability. Semidominant mutations shy2-1D, shy2-2, axr3-1, and axr2-1 induce ectopic light responses in dark-grown seedlings.

  11. Diagenesis and reservoir quality of the Upper Mississippian Aux Vases Sandstone, Illinois Basin

    USGS Publications Warehouse

    Pitman, Janet K.; Henry, Mitchell E.; Leetaru, Hannes E.

    1999-01-01

    Conventional reservoir quality data for more than 300 wells provided by the Illinois and Indiana state geological surveys were analyzed to determine the factors governing porosity and permeability in the Upper Mississippian Aux Vases Sandstone, an important hydrocarbon-producing unit in the Illinois Basin. In addition, approximately 150 samples of the Aux Vases Sandstone were collected for mineralogical and geochemical analysis to reconstruct the burial and diagenetic history and to establish the timing of diagenesis relative to the entrapment of hydrocarbons. One aspect of the study involved linking inorganic and organic diagenesis to late Paleozoic tectonism and hydrothermal fluid-flow events in the region.

  12. Cinétique de photodéposition aux temps longs et réalisation de réseaux permanents modulables

    NASA Astrophysics Data System (ADS)

    Hugonnot, E.; Delville, J. P.

    2002-06-01

    La cinétique de photodéposition aux temps longs est étudiée expérimentalement dans une solution à base de chromate et théoriquement en utilisant un modèle thermodynamique de croissance de goutte. Un comportement universel de la croissance aux temps longs est alors trouvé. L'application de la photodéposition à la réalisation de réseaux holographiques est montrée et l'ajustement du modèle à partir de la figure de diffraction expérimentale permet de remonter à l'évolution temporelle de la morphologie induite par le champ laser.

  13. Naive Students' Conceptual Development and Beliefs: The Need for Multiple Analyses to Determine What Contributes to Student Success in a University Introductory Physics Course

    ERIC Educational Resources Information Center

    Chu, Hye-Eun; Treagust, David F.; Chandrasegaran, A. L.

    2008-01-01

    This research involved naive physics learners who were interested in majoring in science or engineering. In a semester-long quasi-experimental study, open-ended pretests and weekly interviews were used to analyse the progressive development of students' conceptions relating to sound and wave motion. Semi-structured interviews were also conducted…

  14. Thinking Differently about Curriculum: Analysing the Potential Contribution of Physical Education as Part of "Health and Wellbeing" during a Time of Revised Curriculum Ambitions in Scotland

    ERIC Educational Resources Information Center

    Thorburn, Malcolm; Jess, Mike; Atencio, Matthew

    2011-01-01

    Purpose: Following an explanation of the current policy context the paper addresses three particularly pressing challenges: the curriculum focus for physical education as part of health and wellbeing; the major implications for subject knowledge; and how translating curriculum change into professional learning and practice might feasibly occur. In…

  15. Physical, Cognitive and Emotional Factors Contributing to Quality of Life, Functional Health and Participation in Community Dwelling in Chronic Kidney Disease

    PubMed Central

    Seidel, Ulla K.; Gronewold, Janine; Volsek, Michaela; Todica, Olga; Kribben, Andreas; Bruck, Heike; Hermann, Dirk M.

    2014-01-01

    Background Quality of life (QoL) impairment is a well-known consequence of chronic kidney disease (CKD). The factors influencing QoL and late life functional health are poorly examined. Methods Using questionnaires combined with neuropsychological examinations, we prospectively evaluated physical, cognitive, and emotional factors influencing QoL, functional health and participation in community dwelling in 119 patients with CKD stages 3–5 including hemodialysis (61.5±15.7years; 63% men) and 54 control patients of the same age without CKD but with similar cardiovascular risk profile. Results Compared with control patients, CKD patients showed impairment of the physical component of QoL and overall function, assessed by the SF-36 and LLFDI, whereas disability, assessed by LLFDI, was selectively impaired in CKD patients on hemodialysis. Multivariable linear regressions (forced entry) confirmed earlier findings that CKD stage (??=??0.24; p?=?0.012) and depression (??=??0.30; p?=?0.009) predicted the QoL physical component. Hitherto unknown, CKD stage (??=??0.23; p?=?0.007), cognition (??=?0.20; p?=?0.018), and depression (??=??0.51; <0.001) predicted disability assessed by the LLFDI, while age (??=??0.20; p?=?0.023), male gender (B?=?5.01; p?=?0.004), CKD stage (??=??0.23; p?=?0.005), stroke history (B?=??9.00; p?=?0.034), and depression (??=??0.41; p<0.001) predicted overall function. Interestingly, functional health deficits, cognitive disturbances, depression, and anxiety were evident almost only in CKD patients with coronary heart disease (found in 34.2% of CKD patients). The physical component of QoL and functional health decreased with age and depressive symptoms, and increased with cognitive abilities. Conclusions In CKD, QoL, functional health, and participation in community dwelling are influenced by physical, cognitive, and emotional factors, most prominently in coronary heart disease patients. PMID:24614180

  16. CHANGEMENT ORGANISATIONNEL ET IMPLEMENTATION DES TIC : POURQUOI FAIRE ATTENTION AUX DIMENSIONS ECONOMIQUES DE LA

    E-print Network

    Paris-Sud XI, Université de

    1 CHANGEMENT ORGANISATIONNEL ET IMPLEMENTATION DES TIC : POURQUOI FAIRE ATTENTION AUX DIMENSIONS réinterprétation d'études de cas traitant du couplage entre implémentation des ERP et changements organisationnels changements organisationnels, et faisons appel pour cela à des outils de l'économie cognitive, jamais

  17. Initiation aux applications de l'acupuncture en obsttrique 24 -25 novembre 2011

    E-print Network

    Brest, Université de

    Initiation aux applications de l'acupuncture en obstétrique 24 - 25 novembre 2011 Public concerné acupuncteurs Objectifs · Comprendre les principes essentiels de l'acupuncture appliquée à l'obstétrique · Connaître les effets antalgiques de l'acupuncture lors de l'accouchement mais aussi ses effets sur le col

  18. Journe de perfectionnement aux applications de l'acupuncture en obsttrique

    E-print Network

    Brest, Université de

    Journée de perfectionnement aux applications de l'acupuncture en obstétrique 1er décembre 2011 omnipraticiens acupuncteurs Objectifs : Préciser les bases essentielles des techniques d'acupuncture adaptées à l'obstétrique Préciser les meilleures indications de l'acupuncture en obstétrique Apporter une base rationnelle à l

  19. Modelisation des Co-Expositions aux Pesticides : une Approche Bayesienne Nonparametrique

    E-print Network

    Paris-Sud XI, Université de

    Modelisation des Co-Expositions aux Pesticides : une Approche Bay´esienne Nonparam´etrique Am analysis framework. The goal is to determine mixture of pesticides residues which are simultaneously of pesticides is assessed from the available consumption data and contamination analyses. We propose to model

  20. PROBLMES POSS POUR L'APPLICATION DES ALLIAGES DE NIOBIUM AUX AUBES DE TURBINE

    E-print Network

    Boyer, Edmond

    513 PROBL�MES POS�S POUR L'APPLICATION DES ALLIAGES DE NIOBIUM AUX AUBES DE TURBINE par G. GAUJE et R. BRUNETAUD Direction Technique de la SNECMA Résumé. 2014 L'emploi d'alliages de niobium à la place of niobium alloys instead of the current alloys with nickel or cobalt as parent metal for manufacturing

  1. L'ethnologue face aux racismes : l'exemple tsigane** Patrick Williams*

    E-print Network

    Paris-Sud XI, Université de

    L'ethnologue face aux racismes : l'exemple tsigane** Patrick Williams* Ayant fait depuis des majoritaire. The ethnologist and racisms : the example of gipsies Victims of exclusion for centuries, gipsy française, 1988/2 (Ethnologie et racismes, ss la dir. Jacques Gutwirth et Jean-Claude Schmitt), pp. 173

  2. L'adaptation des pratiques de communication orale aux missions des contrleurs de gestion

    E-print Network

    Paris-Sud XI, Université de

    1 L'adaptation des pratiques de communication orale aux missions des contrôleurs de gestion logique du contrôle de gestion, plus la pratique de techniques spécifiques de communication orale devrait of reality. This research aims at precising the required oral communication competencies through the study

  3. Des lois de l'induction aux thormes de Thvenin et de Norton Maria Timofeeva1

    E-print Network

    Paris-Sud XI, Université de

    Des lois de l'induction aux théorèmes de Thévenin et de Norton Maria Timofeeva1 , Gilles Allègre2 circuit permettent au final d'obtenir les schémas équivalents de Thévenin et de Norton de la spire sous. Mots clés : loi de Lenz, loi de l'auto-induction, théorème de Thévenin, théorème de Norton. 1

  4. Rseaux migratoires et structures de pouvoir : la Church of Pentecost du Ghana face aux

    E-print Network

    Paris-Sud XI, Université de

    4 Réseaux migratoires et structures de pouvoir : la Church of Pentecost du Ghana face aux communautés francophones Sandra FANCELLO L'Église de Pentecôte, originaire du Ghana et aujourd'hui implantée le Togo ont progressivement adopté la langue française comme langue liturgique, au Ghana, le débat

  5. Diet preferences of herbivores at pasture Laboratoire adaptation des herbivores aux milieux, Inra, Theix,

    E-print Network

    Paris-Sud XI, Université de

    Review Diet preferences of herbivores at pasture B Dumont Laboratoire adaptation des herbivores aux selection / foraging abilities / herbivores Résumé - Préférences alimentaires des herbivores au pâturage. L alimentaires des herbivores devrait aider à mieux comprendre les choix que ceux-ci réalisent dans la situation

  6. Cloning and expression analysis of novel Aux/IAA family genes in Gossypium hirsutum

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Members of the auxin/indole-3-acetic acid (Aux/IAA) gene family encode proteins to mediate the responses of auxin gene expression and to regulate various aspects of plant morphological development. In this paper, we report the identification of nine cDNAs that contain complete open reading frame (OR...

  7. Rencontres halieutiques -Rsum Session 1 -La pche et l'aquaculture face aux enjeux

    E-print Network

    Paris-Sud XI, Université de

    Rencontres halieutiques - Résumé Session 1 - La pêche et l'aquaculture face aux enjeux du écosystèmes (ESE), AGROCAMPUS OUEST Pêche et aquaculture : les enjeux environnementaux Le secteur des pêches et de l'aquaculture est aujourd'hui un secteur en pleine mutation. L'enjeu est de placer ces

  8. Distribution et extension de la rsistance chloroplastique aux triazines chez les adventices annuelles en France

    E-print Network

    Paris-Sud XI, Université de

    Mauvaise herbe, grande dispersion sont Amaranthus retrojlexus L., Chenopodium album L. et Solanum nigrum L Chenopodium album L., l'existence d'individus dont les chloroplastes sont insensibles aux triazines. Ces. The 3 most widen distributed species are Amaranthus retroflexus L.,Triazine resistance, Chenopodium

  9. LE VOYAGE AUX AMRIQUES ET LES REVUES SAVANTES FRANAISES AU XIXE

    E-print Network

    Paris-Sud XI, Université de

    LE VOYAGE AUX AM�RIQUES ET LES REVUES SAVANTES FRAN�AISES AU XIXE SI�CLE Mona HUERTA* Pouvait " touristes " avant la lettre [...] mais aussi des savants : naturalistes, ingénieurs, médecins, géologues : LA PRESSE DE GRANDE DIFFUSION ET LES SOCI�T�S SAVANTES La presse de grande diffusion et les revues

  10. ARF-Aux/IAA interactions through domain III/IV are not strictly required for auxin-responsive gene expression.

    PubMed

    Wang, Shucai; Hagen, Gretchen; Guilfoyle, Tom J

    2013-06-01

    Auxin response factors (ARFs), together with auxin/indole acetic acid proteins (Aux/IAAs), are transcription factors that play key roles in regulating auxin-responsive transcription in plants. Current models for auxin signaling predict that auxin response is dependent on ARF-Aux/IAA interactions mediated by the related protein-protein interaction domain (i.e., referred to as the CTD) found in the ARF and Aux/IAA C-terminal regions. When auxin concentrations in a cell are low, ARF activators residing on the promoters of auxin response genes are thought to be inactive because of the association with dominant Aux/IAA repressors. When auxin concentrations are elevated, the Aux/IAA repressors are recruited to auxin receptors and degraded via the ubiquitin-proteasome pathway. Destruction of the Aux/IAA repressors allows the ARF activators to function in derepressing/activating auxin response genes. While this auxin signaling pathway is simple and attractive, it is unclear whether auxin-regulated gene expression is solely dependent on ARF-Aux/IAA interactions. Here we show that auxin can affect the expression of auxin response genes in a manner that is independent of the ARF activator CTD. PMID:23603958

  11. Identification and Analyses of AUX-IAA target genes controlling multiple pathways in developing fiber cells of Gossypium hirsutum L

    PubMed Central

    Nigam, Deepti; Sawant, Samir V

    2013-01-01

    Technological development led to an increased interest in systems biological approaches in plants to characterize developmental mechanism and candidate genes relevant to specific tissue or cell morphology. AUX-IAA proteins are important plant-specific putative transcription factors. There are several reports on physiological response of this family in Arabidopsis but in cotton fiber the transcriptional network through which AUX-IAA regulated its target genes is still unknown. in-silico modelling of cotton fiber development specific gene expression data (108 microarrays and 22,737 genes) using Algorithm for the Reconstruction of Accurate Cellular Networks (ARACNe) reveals 3690 putative AUX-IAA target genes of which 139 genes were known to be AUX-IAA co-regulated within Arabidopsis. Further AUX-IAA targeted gene regulatory network (GRN) had substantial impact on the transcriptional dynamics of cotton fiber, as showed by, altered TF networks, and Gene Ontology (GO) biological processes and metabolic pathway associated with its target genes. Analysis of the AUX-IAA-correlated gene network reveals multiple functions for AUX-IAA target genes such as unidimensional cell growth, cellular nitrogen compound metabolic process, nucleosome organization, DNA-protein complex and process related to cell wall. These candidate networks/pathways have a variety of profound impacts on such cellular functions as stress response, cell proliferation, and cell differentiation. While these functions are fairly broad, their underlying TF networks may provide a global view of AUX-IAA regulated gene expression and a GRN that guides future studies in understanding role of AUX-IAA box protein and its targets regulating fiber development. PMID:24497725

  12. Uracil DNA Glycosylase BKRF3 Contributes to Epstein-Barr Virus DNA Replication through Physical Interactions with Proteins in Viral DNA Replication Complex

    PubMed Central

    Su, Mei-Tzu; Liu, I-Hua; Wu, Chia-Wei; Chang, Shu-Ming; Tsai, Ching-Hwa; Yang, Pei-Wen; Chuang, Yu-Chia; Lee, Chung-Pei

    2014-01-01

    ABSTRACT Epstein-Barr virus (EBV) BKRF3 shares sequence homology with members of the uracil-N-glycosylase (UNG) protein family and has DNA glycosylase activity. Here, we explored how BKRF3 participates in the DNA replication complex and contributes to viral DNA replication. Exogenously expressed Flag-BKRF3 was distributed mostly in the cytoplasm, whereas BKRF3 was translocated into the nucleus and colocalized with the EBV DNA polymerase BALF5 in the replication compartment during EBV lytic replication. The expression level of BKRF3 increased gradually during viral replication, coupled with a decrease of cellular UNG2, suggesting BKRF3 enzyme activity compensates for UNG2 and ensures the fidelity of viral DNA replication. In immunoprecipitation-Western blotting, BKRF3 was coimmunoprecipitated with BALF5, the polymerase processivity factor BMRF1, and the immediate-early transactivator Rta. Coexpression of BMRF1 appeared to facilitate the nuclear targeting of BKRF3 in immunofluorescence staining. Residues 164 to 255 of BKRF3 were required for interaction with Rta and BALF5, whereas residues 81 to 166 of BKRF3 were critical for BMRF1 interaction in glutathione S-transferase (GST) pulldown experiments. Viral DNA replication was defective in cells harboring BKRF3 knockout EBV bacmids. In complementation assays, the catalytic mutant BKRF3(Q90L,D91N) restored viral DNA replication, whereas the leucine loop mutant BKRF3(H213L) only partially rescued viral DNA replication, coupled with a reduced ability to interact with the viral DNA polymerase and Rta. Our data suggest that BKRF3 plays a critical role in viral DNA synthesis predominantly through its interactions with viral proteins in the DNA replication compartment, while its enzymatic activity may be supplementary for uracil DNA glycosylase (UDG) function during virus replication. IMPORTANCE Catalytic activities of both cellular UDG UNG2 and viral UDGs contribute to herpesviral DNA replication. To ensure that the enzyme activity executes at the right time and the right place in DNA replication forks, complex formation with other components in the DNA replication machinery provides an important regulation for UDG function. In this study, we provide the mechanism for EBV UDG BKRF3 nuclear targeting and the interacting domains of BKRF3 with viral DNA replication proteins. Through knockout and complementation approaches, we further demonstrate that in addition to UDG activity, the interaction of BKRF3 with viral proteins in the replication compartment is crucial for efficient viral DNA replication. PMID:24872582

  13. Climate Change 2013: The Physical Science Basis. An overview of the Working Group 1 contribution to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC).

    NASA Astrophysics Data System (ADS)

    Allen, Simon K.; Plattner, Gian-Kasper; Nauels, Alexander; Xia, Yu; Stocker, Thomas F.

    2014-05-01

    The Working Group 1 contribution to the IPCC Fifth Assessment Report (AR5) extends from observations and paleoclimate information regarding past changes in the climate system, a comprehensive evaluation of climate models, the detection and attribution of observed changes to natural or anthropogenic forcing, through to projected future changes on both near-term and long-term time scales. Human influence on the climate system is now detected with increased certainty, both globally and in most regions. Since the mid-20th century, the increase in anthropogenic greenhouse gas concentrations has led to surface warming over almost the entire globe, while at the same time, the ocean has continued to warm and store energy. Satellite based observations reveal with improved precision that summer sea ice extent is declining rapidly in the Arctic, glaciers are retreating world-wide, and global mean sea level continues to rise. Concurrent with a continued increase in atmospheric CO2 concentrations, the oceanic uptake of CO2 has resulted in decreasing pH of seawater since the beginning of the industrial era. Projections of future changes in the climate system to the end of the 21st century are based on a series of new climate models and new scenarios, but are broadly consistent with previous assessment findings, confirming widespread and significant changes across the climate system. Greater warming is projected to occur over land than ocean, with the most rapid warming in the Arctic region. Based on modeled changes in seasonal mean precipitation, the contrast between wet and dry regions, and wet and dry seasons is projected to increase as global temperatures rise. Confidence in projections of global mean sea level rise has increased since the previous IPCC assessment report, and projections now include future rapid ice-sheet dynamical changes. On long time scales, warming is dominated by total emissions of CO2, and many changes will persist for centuries even if CO2 emissions were stopped. In 2014, the Fifth Assessment cycle of the IPCC will be completed following the release of the reports of Working Groups II (impacts, adaptation and vulnerability) and Working Groups III (mitigation of climate change), and finally the Synthesis Report, the combined synthesis product based on all three underlying Working Group assessment reports.

  14. Structure and expression analysis of early auxin-responsive Aux\\/IAA gene family in rice ( Oryza sativa )

    Microsoft Academic Search

    Mukesh Jain; Navneet Kaur; Rohini Garg; Jitendra K. Thakur; Akhilesh K. Tyagi; Jitendra P. Khurana

    2006-01-01

    Auxin exerts pleiotropic effects on plant growth and development by regulating the expression of early auxin-responsive genes\\u000a of auxin\\/indoleacetic acid (Aux\\/IAA), small auxin-up RNA, and GH3 classes. These genes have been studied extensively in dicots like soybean and Arabidopsis. We had earlier characterized a cDNA of the first monocot member of Aux\\/IAA family from rice. The achievement of the large

  15. The Tomato Aux\\/IAA Transcription Factor IAA9 Is Involved in Fruit Development and Leaf Morphogenesis

    Microsoft Academic Search

    Hua Wang; Brian Jones; Zhengguo Li; Pierre Frasse; Corinne Delalande; Farid Regad; Salma Chaabouni; Alain Latche; Jean-Claude Pech; Mondher Bouzayena; Nationale Superieure

    2005-01-01

    Auxin\\/indole-3-acetic acid (Aux\\/IAA) proteins are transcriptional regulators that mediate many aspects of plant responses to auxin. While functions of most Aux\\/IAAs have been defined mainly by gain-of-function mutant alleles in Arabidopsis thaliana, phenotypes associated with loss-of-function mutations have been scarce and subtle. We report here that the downregulation of IAA9, a tomato (Solanum lycopersicum) gene from a distinct subfamily of

  16. Genome-wide identification, functional analysis and expression profiling of the Aux/IAA gene family in tomato.

    PubMed

    Audran-Delalande, Corinne; Bassa, Carole; Mila, Isabelle; Regad, Farid; Zouine, Mohamed; Bouzayen, Mondher

    2012-04-01

    Auxin is a central hormone that exerts pleiotropic effects on plant growth including the development of roots, shoots, flowers and fruit. The perception and signaling of the plant hormone auxin rely on the cooperative action of several components, among which auxin/indole-3-acetic acid (Aux/IAA) proteins play a pivotal role. In this study, we identified and comprehensively analyzed the entire Aux/IAA gene family in tomato (Solanum lycopersicum), a reference species for Solanaceae plants, and the model plant for fleshy fruit development. Functional characterization using a dedicated single cell system revealed that tomato Aux/IAA proteins function as active repressors of auxin-dependent gene transcription, with, however, different Aux/IAA members displaying varying levels of repression. Phylogenetic analysis indicated that the Aux/IAA gene family is slightly contracted in tomato compared with Arabidopsis, with a lower representation of non-canonical proteins. Sl-IAA genes display distinctive expression pattern in different tomato organs and tissues, and some of them display differential responses to auxin and ethylene, suggesting that Aux/IAAs may play a role in linking both hormone signaling pathways. The data presented here shed more light on Sl-IAA genes and provides new leads towards the elucidation of their function during plant development and in mediating hormone cross-talk. PMID:22368074

  17. Dodo remains from an in situ context from Mare aux Songes, Mauritius

    NASA Astrophysics Data System (ADS)

    Meijer, Hanneke J. M.; Gill, Arike; de Louw, Perry G. B.; van den Hoek Ostende, Lars W.; Hume, Julian P.; Rijsdijk, Kenneth F.

    2012-03-01

    Since 2005, excavations at Mare aux Songes, Mauritius, have revealed the presence of a very rich, ˜4,200-year-old fossil bone bed including dodo ( Raphus cucullatus) bones and bone fragments. The recently excavated dodo assemblage comprises at least 17 individuals and is characterised by the presence of small and fragile skeletal elements, a dominance of leg elements and an absence of juveniles. The hydrology of the area suggests that dodos, like many other species, were probably lured to Mare aux Songes by the presence of freshwater during times of drought. The most likely scenario for the origin of the fossil deposit is that animals became trapped in the sediment in repeated miring events, which would favour the conservation of hindlimbs. Such a scenario is fully in accordance with the taphonomic characteristics of the bone assemblage.

  18. Genome-wide analysis of Aux/IAA and ARF gene families in Populus trichocarpa

    SciTech Connect

    Kalluri, Udaya C [ORNL; DiFazio, Stephen P [West Virginia University; Brunner, A. [Virginia Polytechnic Institute and State University (Virginia Tech); Tuskan, Gerald A [ORNL

    2007-01-01

    Auxin/Indole-3-Acetic Acid (Aux/IAA) and Auxin Response Factor (ARF) transcription factors are key regulators of auxin responses in plants. A total of 35 Aux/IAA and 39 ARF genes were identified in the Populus genome. Comparative phylogenetic analysis revealed that the subgroups PoptrARF2, 6, 9 and 16 and PoptrIAA3, 16, 27 and 29 have differentially expanded in Populus relative to Arabidopsis. Activator ARFs were found to be two fold-overrepresented in the Populus genome. PoptrIAA and PoptrARF gene families appear to have expanded due to high segmental and low tandem duplication events. Furthermore, expression studies showed that genes in the expanded PoptrIAA3 subgroup display differential expression. The gene-family analysis reported here will be useful in conducting future functional genomics studies to understand how the molecular roles of these large gene families translate into a diversity of biologically meaningful auxin effects.

  19. The "Vsoil Platform" : a tool to integrate the various physical, chemical and biological processes contributing to the soil functioning at the local scale.

    NASA Astrophysics Data System (ADS)

    Lafolie, François; Cousin, Isabelle; Mollier, Alain; Pot, Valérie; Moitrier, Nicolas; Balesdent, Jérome; bruckler, Laurent; Moitrier, Nathalie; Nouguier, Cédric; Richard, Guy

    2014-05-01

    Models describing the soil functioning are valuable tools for addressing challenging issues related to agricultural production, soil protection or biogeochemical cycles. Coupling models that address different scientific fields is actually required in order to develop numerical tools able to simulate the complex interactions and feed-backs occurring within a soil profile in interaction with climate and human activities. We present here a component-based modelling platform named "VSoil", that aims at designing, developing, implementing and coupling numerical representation of biogeochemical and physical processes in soil, from the aggregate to the profile scales. The platform consists of four softwares, i) Vsoil_Processes dedicated to the conceptual description of processes and of their inputs and outputs, ii) Vsoil_Modules devoted to the development of numerical representation of elementary processes as modules, iii) Vsoil_Models which permits the coupling of modules to create models, iv) Vsoil_Player for the run of the model and the primary analysis of results. The platform is designed to be a collaborative tool, helping scientists to share not only their models, but also the scientific knowledge on which the models are built. The platform is based on the idea that processes of any kind can be described and characterized by their inputs (state variables required) and their outputs. The links between the processes are automatically detected by the platform softwares. For any process, several numerical representations (modules) can be developed and made available to platform users. When developing modules, the platform takes care of many aspects of the development task so that the user can focus on numerical calculations. Fortran2008 and C++ are the supported languages and existing codes can be easily incorporated into platform modules. Building a model from available modules simply requires selecting the processes being accounted for and for each process a module. During this task, the platform displays available modules and checks the compatibility between the modules. The model (main program) is automatically created when compatible modules have been selected for all the processes. A GUI is automatically generated to help the user providing parameters and initial situations. Numerical results can be immediately visualized, archived and exported. The platform also provides facilities to carry out sensitivity analysis. Parameters estimation and links with databases are being developed. The platform can be freely downloaded from the web site (http://www.inra.fr/sol_virtuel/) with a set of processes, variables, modules and models. However, it is designed so that any user can add its own components. Theses adds-on can be shared with co-workers by means of an export/import mechanism using the e-mail. The adds-on can also be made available to the whole community of platform users when developers asked for. A filtering tool is available to explore the content of the platform (processes, variables, modules, models).

  20. Optimiser le processus d'innovation grce aux traces informatiques d'usages

    E-print Network

    Turner, William

    'analyse de traces informatiques d'interaction. La méthode proposée s'inscrit en complément des méthodes ethnométhodologique. Nous souhaitons savoir s'il est envisageable de fournir aux concepteurs un tableau de bord'objectif pourrait consister à rendre ce tableau de bord des usages interactif, et à tirer profit de la plasticité

  1. L'intervenant face aux objectifs de mission: entre tensions vécues et régulations tentées

    Microsoft Academic Search

    Michel Verstraeten

    2006-01-01

    Lorsqu’on s’intéresse aux récits de missions de conseil, on constate que les objectifs de mission qui sont proposés à l’intervenant suscitent souvent chez lui des questions délicates :faut-il poursuivre ce travail avec lequel je ne me sens pas en accord ?dans quelle voie faut-il s'engager face à une incompatibilité entre les souhaits du commanditaire et les objectifs contractualisés ?faut-il aller

  2. L’hostilité aux OGM survit-elle à des produits attractifs ?

    Microsoft Academic Search

    Elsa Kassardjian; Stéphane Robin; Bernard Ruffieux

    2008-01-01

    Nous testons ici les dispositions à payer des consommateurs pour des aliments transgéniques de seconde génération, c’est-à-dire ayant des caractéristiques innovantes attractives pour le consommateur par rapport au produit conventionnel. Nous testons également les dispositions à payer de tels produits lorsqu’ils sont obtenus avec des technologies alternatives aux biotechnologies transgéniques. Les résultats indiquent que la disposition à payer positive pour

  3. L'hostilité aux OGM survit-elle à des produits attractifs ?

    Microsoft Academic Search

    Elsa Kassardjian; Stéphane Robin; Bernard Ruffieux

    2008-01-01

    Nous testons ici les dispositions à payer des consommateurs pour des aliments transgéniques de seconde génération, c'est-à-dire ayant des caractéristiques innovantes attractives pour le consommateur par rapport au produit conventionnel. Nous testons également les dispositions à payer de tels produits lorsqu'ils sont obtenus avec des technologies alternatives aux biotechnologies transgéniques. Les résultats indiquent que la disposition à payer positive pour

  4. Gopolitiques de Brest 2010 Migrations forces et vulnrabilits diffrencies face aux

    E-print Network

    Paris-Sud XI, Université de

    ravagea Londres en 1666 ou du tremblement de terre de Lisbonne en 1755 ou encore du Dust 1 Cet article est Sellin et Linda Gardelle (Ed.) (2012) 137-156" #12;Géopolitiques de Brest 2010 2 bowl aux Etats Unis souligne François Gemenne « jusqu'à l'exode provoqué par l'ouragan Katrina en 2005, la migration du Dust

  5. Electronic and geometric structure of AuxCuy clusters studied by density functional theory

    NASA Astrophysics Data System (ADS)

    Kadioglu, Y.; Üzengi Aktürk, O.; Tomak, M.

    2014-01-01

    We have determined the stable structures of AuCun, Au2Cun, Au3Cun and AuxCu8-x clusters. It has been observed that AuCun, Au2Cun and Au3Cun systems have two-dimensional (2D) structures up to six atoms and they become three-dimensional (3D) afterwards. AuxCu8-x clusters favor 3D structures till the Au7Cu1 cluster. We have found a lowest energy isomer of Au6Cu2 from the literature. Bond lengths, binding energies, density of states (DOS), highest occupied molecular orbital-lowest unoccupied molecular orbital (HOMO-LUMO) gaps, ionization potential (IP) and electron affinity (EA) have been calculated for these structures using the first principles density functional theory (DFT) within the generalized gradient approximation (GGA) and the local density approximation (LDA). Generally, we have observed the overlap between s electrons of Cu and p electrons of Au near the Fermi level. Charge transfers are calculated by using the Löwdin analysis. It is observed that one Cu atom does not significantly modify the clusters which have more gold atoms. It is also seen that these clusters generally have nonmagnetic properties and results are consistent with the hybridization between s and d orbitals of Au in AuxCu8-x clusters.

  6. Approche aux soins en milieu communautaire à des adultes ayant une déficience développementale

    PubMed Central

    Osmun, W.E.; Chan, Nelson; Solomon, Robert

    2015-01-01

    Résumé Objectif Passer en revue les obligations d’ordre médical, éthique et juridique dans les soins aux adultes ayant une déficience développementale (DD) qui vivent dans la communauté. Sources des données Des recherches ont été faites dans Google et MEDLINE à l’aide des mots disabled, disability, vulnerable et community. Les lois pertinentes ont fait l’objet d’un examen. Message principal Le traitement d’un patient ayant une DD varie en fonction de facteurs comme la pathogenèse du problème actuel du patient, ses affections concomitantes, la gravité de ses déficiences et ses soutiens sociaux habituels. Bien que l’on s’entende sur les bienfaits du transfert des soins institutionnels vers des soins communautaires pour les patients ayant une DD, il s’est révélé difficile de leur dispenser des soins de grande qualité en milieu communautaire. Par ailleurs, il existe peu de travaux de recherche sur les façons d’offrir efficacement des soins aux adultes ayant une DD. En tant que professionnels des soins primaires, les médecins de famille sont souvent le premier point de contact pour les patients et sont à la fois responsables de la coordination et de la continuité des soins. Compte tenu de l’importance accrue accordée aux soins préventifs et à la détection précoce des maladies, la participation active du patient revêt aussi une grande importance. Les valeurs et les objectifs du patient sont des éléments essentiels à prendre en compte, même s’ils vont à l’encontre de la bonne santé du patient ou des propres valeurs du clinicien. Les lois s’appliquant aux personnes vulnérables varient d’une province à l’autre. Par conséquent, l’obligation de signaler des mauvais traitements suspectés pourrait différer selon que la personne vulnérable habite dans un centre de soins ou la communauté, que la personne qui soupçonne le comportement abusif est un fournisseur de services ou un professionnel de la santé ou encore que les circonstances spécifiques répondent à la définition légale de mauvais traitement ou de négligence. Conclusion Les professionnels des soins primaires doivent dispenser aux adultes ayant une DD des soins empreints de compassion qui respectent les souhaits du patient.

  7. JOURNAL DE PHYSIQUE Colloque C4, supplkment au no 5, tome 35, Mai 1974,page C4-213 CONTRIBUTION OF GIANT SPIN CLUSTERS TO

    E-print Network

    Paris-Sud XI, Université de

    : APPLICATION TO Ni-Cu (*) K. LEVIN and D. L. MILLS Physics Department, University of California, Irvine des neutrons, et la chaleur specifique. Nous croyons que ce modble s'applique aux alliages de Ni-Cu temperaturesdans les alliages Ni-Cu, pour des concentrations et des temperatures voisines des conditions critiques

  8. Overexpression of the non-canonical Aux/IAA genes causes auxin-related aberrant phenotypes in Arabidopsis.

    PubMed

    Sato, Atsuko; Yamamoto, Kotaro T

    2008-06-01

    Degradation of Aux/IAA proteins which are triggered by the ubiquitin ligase complex containing the auxin F-box receptors (AFBs), is thought to be the primary reaction of auxin signaling. Upon auxin perception, AFBs bind domain II of Aux/IAA proteins that is conserved in most of the 29 family members in Arabidopsis. However, IAA20 and IAA30 lack domain II. Furthermore, IAA31, which forms a single clade with IAA20 and IAA30 in Aux/IAA protein family, has a partially conserved domain II, which contains an amino acid substitution that would cause a dominant mutation of Aux/IAA genes. It has been shown that the half-lives of these proteins are much longer than those of the canonical Aux/IAA proteins. We generated overexpression lines (OXs) of IAA20, IAA30 and IAA31 by the use of cauliflower mosaic virus 35S promoter to better understand the molecular function of atypical Aux/IAA proteins in Arabidopsis. OXs of the three genes exhibited similar auxin-related aberrant phenotypes, with IAA20 OX showing the most severe defects: Some of them showed a semi-dwarf phenotype; gravitropic growth orientation was often affected in hypocotyl and root; vasculature of cotyledons was malformed; the primary root stopped growing soon after germination because of collapse of root apical meristem. IAA 20 and IAA30 were early auxin inducible, but IAA31 was not. These results showed that the wild-type genes of the three Aux/IAAs could disturb auxin physiology when ectopically overexpressed. PMID:18298415

  9. Townes' contribution to nonlinear optics

    NASA Astrophysics Data System (ADS)

    Garmire, Elsa

    2015-03-01

    In honour of the Fiftieth Anniversary of the Nobel Prize in Physics, this talk introduced the contributions of Nicholas Basov and Alexei Prokhorov, who shared the prize with Charles Townes. The talk then detailed the quantum electronics research of Townes, particularly at MIT, which was related to nonlinear optics. The years from 1961 to 1968 were particularly exciting, as the ruby laser enabled a wide variety of new physics to be discovered and explored.

  10. What Makes each Aux/IAA Gene Unique in its Gene Family, Expression Pattern or Properties of the Gene Product?

    PubMed

    Muto, Hideki; Watahiki, Masaaki K; Yamamoto, Kotaro T

    2007-09-01

    In the auxin signal transduction, two protein families, Aux/IAAs and auxin response factors, play a crucial role just downstream of auxin F-box receptors. Distinct and overlapping phenotypes of the dominant Aux/IAA mutants suggest some functional differentiation of the Aux/IAA genes in auxin signaling. Taking advantage of unique phenotypes of the msg2/iaa19 mutants, we carried out promoter-exchange experiments, where cDNA of the msg2, axr2/iaa7 or slr/iaa14 gene was driven by the MSG2 or AXR2 promoter. The cDNAs were translationally fused to the green fluorescent protein gene to measure levels of expressed protein. Results showed that many abnormal phenotypes of the dominant Aux/IAA mutants were governed by their promoter activity, but some were dependent on their gene products. The latter result highlights the possible importance of Aux/IAA protein level controled by auxin F-box receptors. PMID:19704610

  11. Supervising the Secondary School Physical Education Program.

    ERIC Educational Resources Information Center

    Heitmann, Helen M.

    1988-01-01

    Physical education contributes to the physical, mental, and emotional health of young people. Administrators must recognize these contributions and ensure an effective program by evaluating and retraining teachers to keep abreast of the recent knowledge explosion in physical education. (CJH)

  12. Carl Neumann's Contributions to Electrodynamics

    NASA Astrophysics Data System (ADS)

    Schlote, Karl-Heinz

    2004-09-01

    I examine the publications of Carl Neumann (1832 1925) on electrodynamics, which constitute a major part of his work and which illuminate his approach to mathematical physics. I show how Neumann contributed to physics at an important stage in its development and how his work led to a polemic with Hermann Helmholtz (1821 1894). Neumann advanced and extended the ideas of the Königsberg school of mathematical physics. His investigations were aimed at founding a mathematically exact physical theory of electrodynamics, following the approach of Carl G.J. Jacobi (1804 1851) on the foundation of a physical theory as outlined in Jacobi’s lectures on analytical mechanics. Neumann’s work also shows how he clung to principles that impeded him in appreciating and developing new ideas such as those on field theory that were proposed by Michael Faraday (1791 1867) and James Clerk Maxwell (1831 1879).

  13. History of Medical Physics.

    ERIC Educational Resources Information Center

    Laughlin, John S.

    1983-01-01

    Traces the development of basic radiation physics that underlies much of today's medical physics and looks separately at the historical development of two major subfields of medical physics: radiation therapy and nuclear medicine. Indicates that radiation physics has made important contributions to solving biomedical problems in medical…

  14. Diversity of stability, localization, interaction and control of downstream gene activity in the Maize Aux/IAA protein family.

    PubMed

    Ludwig, Yvonne; Berendzen, Kenneth W; Xu, Changzheng; Piepho, Hans-Peter; Hochholdinger, Frank

    2014-01-01

    AUXIN/INDOLE-3-ACETIC ACID (Aux/IAA) proteins are central regulators of auxin signal transduction. They control many aspects of plant development, share a conserved domain structure and are localized in the nucleus. In the present study, five maize Aux/IAA proteins (ZmIAA2, ZmIAA11, ZmIAA15, ZmIAA20 and ZmIAA33) representing the evolutionary, phylogenetic and expression diversity of this gene family were characterized. Subcellular localization studies revealed that ZmIAA2, ZmIAA11 and ZmIAA15 are confined to the nucleus while ZmIAA20 and ZmIAA33 are localized in both the nucleus and the cytoplasm. Introduction of specific point mutations in the degron sequence (VGWPPV) of domain II by substituting the first proline by serine or the second proline by leucine stabilized the Aux/IAA proteins. While protein half-life times between ?11 min (ZmIAA2) to ?120 min (ZmIAA15) were observed in wild-type proteins, the mutated forms of all five proteins were almost as stable as GFP control proteins. Moreover, all five maize Aux/IAA proteins repressed downstream gene expression in luciferase assays to different degrees. In addition, bimolecular fluorescence complementation (BiFC) analyses demonstrated interaction of all five Aux/IAA proteins with RUM1 (ROOTLESS WITH UNDETECTABLE MERISTEM 1, ZmIAA10) while only ZmIAA15 and ZmIAA33 interacted with the RUM1 paralog RUL1 (RUM-LIKE 1, ZmIAA29). Moreover, ZmIAA11, ZmIAA15 ZmIAA33 displayed homotypic interaction. Hence, despite their conserved domain structure, maize Aux/IAA proteins display a significant variability in their molecular characteristics which is likely associated with the wide spectrum of their developmental functions. PMID:25203637

  15. Auxin-induced, SCF(TIR1)-mediated poly-ubiquitination marks AUX/IAA proteins for degradation.

    PubMed

    Maraschin, Felipe dos Santos; Memelink, Johan; Offringa, Remko

    2009-07-01

    The plant hormone auxin (indole-3-acetic acid or IAA) regulates plant development by inducing rapid cellular responses and changes in gene expression. Auxin promotes the degradation of Aux/IAA transcriptional repressors, thereby allowing auxin response factors (ARFs) to activate the transcription of auxin-responsive genes. Auxin enhances the binding of Aux/IAA proteins to the receptor TIR1, which is an F-box protein that is part of the E3 ubiquitin ligase complex SCF(TIR1). Binding of Aux/IAA proteins leads to degradation via the 26S proteasome, but evidence for SCF(TIR1)-mediated poly-ubiquitination of Aux/IAA proteins is lacking. Here we used an Arabidopsis cell suspension-based protoplast system to find evidence for SCF(TIR1)-mediated ubiquitination of the Aux/IAA proteins SHY2/IAA3 and BDL/IAA12. Each of these proteins showed a distinct abundance and repressor activity when expressed in this cell system. Moreover, the amount of endogenous TIR1 protein appeared to be rate-limiting for a proper auxin response measured by the co-transfected DR5::GUS reporter construct. Co-transfection with 35S::TIR1 led to auxin-dependent degradation, and excess of 35S::TIR1 even led to degradation of Aux/IAAs in the absence of auxin treatment. Expression of the mutant tir1-1 protein or the related F-box protein COI1, which is involved in jasmonate signaling, had no effect on Aux/IAA degradation. Our results show that SHY2/IAA3 and BDL/IAA12 are poly-ubiquitinated and degraded in response to increased auxin or TIR1 levels. In conclusion, our data provide experimental support for the model that SCF(TIR1)-dependent poly-ubiquitination of Aux/IAA proteins marks these proteins for degradation by the 26S proteasome, leading to activation of auxin-responsive gene expression. PMID:19309453

  16. Morphological variations in AuxSiy nanostructures under variable pressure and annealing conditions

    NASA Astrophysics Data System (ADS)

    Rath, A.; Dash, J. K.; Juluri, R. R.; Satyam, P. V.

    2015-03-01

    Well-ordered, substrate symmetry-driven, AuxSiy structures of average size ~25 nm were formed under ultra-high vacuum (UHV) conditions using molecular beam epitaxy method. Post-annealing was done at 500 °C in three different vacuum conditions: (1) low vacuum (LV) (10-2 mbar), (2) high vacuum (HV) (10-5 mbar) and (3) UHV (10-10 mbar) (MBE chamber). For both HV and LV cases, the AuxSiy nanostructures were found to have their corners rounded unlike in UHV case where the structures have sharp edges. In all the above three cases, samples were exposed to air before annealing. In situ annealing inside UHV chamber without exposing to air resulted in well-aligned rectangles with sharp corners, while sharp but irregular island structures were found for air exposed and UHV annealing system. The role of residual gases present in LV and HV annealing environment and inhibition of lateral surface diffusion due to the presence of surface oxide (through air exposure) would be discussed. Annealing at various conditions yielded variation in the coverage and correspondingly, the average area of nanostructures varied from a ~329 nm2 (as deposited) to ~2,578 nm2 (at high temperature). High-resolution transmission electron microscopy (planar and cross section) has been utilized to study the morphological variations.

  17. Contributions to environmental mechanics: Introduction

    NASA Astrophysics Data System (ADS)

    Raats, Peter A. C.; Smiles, David E.; Warrick, Arthur W.

    In the second half of the 20th century, environmental mechanics developed from a collection of loosely connected principles and techniques t o a coherent quantitative treatment of flow and transport in the soil-plant-atmosphere continuum. John Philip was in many respects the life and soul of this adventure . He contributed foremost to the physics of water in unsaturated soils, but also to micrometeorology and physical ecology. In this introductory chapter we briefly review how his contributions influenced and are related to the activities of his colleagues and provide an overview of the present status of theory of soil water movement. We also indicate how the various contributions to this volume fit in this context. We start with a discussion of the nature, foundation, and application of the Richards equation, with emphasis on the dominant role of John Philip in finding analytical solutions of this equation. This is followed by a discussion of various developments beyond the Richards equation: multiphase flow, simultaneous transport of water and heat, flow of water in soils subject to swelling-shrinkage, transport of solutes in unsaturated soils, and flow and transport processes at various scales in space and time. The varied contributions of John Philip to micrometeorology and physical ecology are also reviewed briefly. In the concluding section, some challenges for environmental mechanics are indicated.

  18. Charm contribution to bulk viscosity

    NASA Astrophysics Data System (ADS)

    Laine, M.; Sohrabi, Kiyoumars A.

    2015-02-01

    In the range of temperatures reached in future heavy ion collision experiments, hadronic pair annihilations and creations of charm quarks may take place within the lifetime of the plasma. As a result, charm quarks may increase the bulk viscosity affecting the early stages of hydrodynamic expansion. Assuming thermalisation, we estimate the charm contribution to bulk viscosity within the same effective kinetic theory framework in which the light parton contribution has been computed previously. The time scale at which this physics becomes relevant is related to the width of the transport peak associated with the trace anomaly correlator and is found to be fm/c for MeV.

  19. Charm contribution to bulk viscosity

    E-print Network

    M. Laine; Kiyoumars A. Sohrabi

    2015-02-24

    In the range of temperatures reached in future heavy ion collision experiments, hadronic pair annihilations and creations of charm quarks may take place within the lifetime of the plasma. As a result, charm quarks may increase the bulk viscosity affecting the early stages of hydrodynamic expansion. Assuming thermalization, we estimate the charm contribution to bulk viscosity within the same effective kinetic theory framework in which the light parton contribution has been computed previously. The time scale at which this physics becomes relevant is related to the width of the transport peak associated with the trace anomaly correlator, and is found to be 600 MeV.

  20. Du suicide de Mme Follin en 1828 aux suicides du dbut du XXe sicle: pour une tude

    E-print Network

    Paris-Sud XI, Université de

    Du suicide de Mme Follin en 1828 aux suicides du début du XXe siècle: pour une étude des violences'extinction du suicide, Revue de Rouen, 1844). Introduction Le 16 décembre 1828 le préfet de la Seine « suicide » chez les aliénés « fous moraux » ou suicidaires. L'ouverture des cerveaux permettrait de définir

  1. Identification de ligands des enzymes de rsistance aux aminoglycosides par RMN. NMR identification of ligands of aminoglycoside resistance enzymes.

    E-print Network

    Paris-Sud XI, Université de

    - 1 - Identification de ligands des enzymes de résistance aux aminoglycosides par RMN. NMR identification of ligands of aminoglycoside resistance enzymes. Frédérique Maurice1 , Guillaume Bégis2 , Laurent principalement la conséquence de l'action d'enzymes qui modifient chimiquement ces antibiotiques et les empêchent

  2. Evolution des missions de CO2 lies aux mobilits quotidiennes : une stabilit en trompe l'oeil

    E-print Network

    Paris-Sud XI, Université de

    1 Evolution des émissions de CO2 liées aux mobilités quotidiennes : une stabilité en trompe l : une stabilité en trompe l'oeil », Recherche ­ Transport - Sécurité, vol. 27, n°2, pp.128-139. halshs

  3. 238 C. WOLF. -L'IRRADIATION DU LAIT L'IRRADIATION DU LAIT AUX ETATS-UNIS

    E-print Network

    Paris-Sud XI, Université de

    Depuis 1931, les laits contenant de la vitamine D font, aux Etats- Unis, l'objet d'un commerce Impor-tanb. C'est, en effet, à cette date que le premier lait liquide à vitamine D fut mis sur le marché époque. Le lait, à vitamine D le plus-c

  4. L'acceptabilit du placement de marques dans les jeux vido : une application aux joueurs de 15-35 ans

    E-print Network

    Paris-Sud XI, Université de

    managerial implications. Key-words: Advergaming, acceptability, brand placement, product placement, video1 L'acceptabilité du placement de marques dans les jeux vidéo : une application aux joueurs de 15 placement de marques dans les jeux vidéo souffre du peu de recherches sur l'attitude des joueurs à son égard

  5. Shoot-supplied ammonium targets the root auxin influx carrier AUX1 and inhibits lateral root emergence

    E-print Network

    Kronzucker, Herbert J.

    Shoot-supplied ammonium targets the root auxin influx carrier AUX1 and inhibits lateral root in shoots but relates to the auxin response in roots. Expression analyses of an auxin-responsive reporter, DR5:GUS, and direct assays of auxin transport demonstrated that SSA inhibits root acro- petal

  6. Thomas Young's contributions to geometrical optics.

    PubMed

    Atchison, David A; Charman, W Neil

    2011-07-01

    In addition to his work on physical optics, Thomas Young (1773-1829) made several contributions to geometrical optics, most of which received little recognition in his time or since. We describe and assess some of these contributions: Young's construction (the basis for much of his geometric work), paraxial refraction equations, oblique astigmatism and field curvature, and gradient-index optics. PMID:21214628

  7. Contributed Paper Assessing Citizen Contributions to Butterfly

    E-print Network

    Illinois at Chicago, University of

    Contributed Paper Assessing Citizen Contributions to Butterfly Monitoring in Two Large Cities K. C, we compared butterfly data collected over 10 years in Chicago, Illinois (U.S.A.), and New York City were associated with the reported proportion of the estimated regional pool of butterfly species. We

  8. Research in physical chemistry and chemical education: Part A: Water Mediated Chemistry of Oxidized Atmospheric Compounds Part B: The Development of Surveying Tools to Determine How Effective Laboratory Experiments Contribute to Student Conceptual Understanding

    NASA Astrophysics Data System (ADS)

    Maron, Marta Katarzyna

    This dissertation is a combination of two research areas, experimental physical chemistry, Chapters I to V, and chemical education, Chapters VI to VII. Chapters I to V describe research on the water-mediated chemistry of oxidized atmospheric molecules and the impact that water has on the spectra of these environmental systems. The role of water in the Earth's atmosphere has been of considerable interest due to its ability to impact chemistry and climate. Oxidized atmospheric molecules in the presence of water have the ability to form hydrogen bonded water complexes. The spectroscopic investigation of nitric acid-water complexes, outlined in Chapter III, was undertaken to characterize intermolecular hydrogen bonds in a water-restricted environment at ambient temperatures. Additionally, this characterization of nitric acid-water complexes allowed for the comparison of calculated overtone OH-stretching vibrational band frequencies, intensities, and anharmonicities of intermolecular hydrogen-bonded water complexes with experimental observations. Oxidized organic molecules, such as aldehydes and ketones, in addition to forming hydrogen-bonded water complexes can undergo a hydration reaction of the carbonyl group and form germinal diols in the presence of water. This chemistry has been studied extensively in bulk aqueous media, however little is known about this process in the gas-phase at low water concentrations. The focus of the studies outlined in Chapters IV and V is motivated by the ability of pyruvic acid and formaldehyde to form germinal diols and water complexes in water-restricted environment. This water-mediated chemistry changes the physical and chemical properties of these organic molecules, therefore, impacting the partitioning between gas and particle phase, as well as the chemistry and photochemistry of oxidized organic molecules in the Earth's atmosphere. The results presented in this dissertation may help resolve the significant discrepancy between atmospherically measured oxidized organic molecules and predictions of atmospheric models at different relative humidities. The chemical education portion of this manuscript presented in Chapters VI and VII includes the development of a survey to determine how effective a laboratory experiment is in contributing to students' understanding of fundamental chemistry. The specific example used is an electrochemical cell. Our initial results showed that while most of our students could answer quantitative questions about the operation of the cell, their conceptual understanding of the microscopic processes that occur within the cell was inconsistent with the material presented in class. In particular, we noticed that while many students were able to correctly describe the events that take place at the surface of the anode and cathode, their understanding of the events that take place at the salt bridge was lacking. In this investigation, we were able to confirm the misconceptions reported in previous studies. Our results suggest that a relatively modest, incremental revision of the experiment reduces these misconceptions and helped the students to develop a molecular-scale picture of the processes that occur within an electrochemical cell.

  9. APPLIED PHYSICS APPLIED PHYSICS

    E-print Network

    Mottram, Nigel

    MSc APPLIED PHYSICS #12;MSc APPLIED PHYSICS This taught Masters course is based on the strong research in Applied Physics in the University's Department of Physics. The department has an impressive photonics and quantum optics, Physics and the Life Sciences, and solid state physics. The knowledge gained

  10. Physical fitness training for people with stroke 

    E-print Network

    Saunders, David H.

    2009-01-01

    INTRODUCTION: Impaired physical fitness may contribute to functional limitations and disability after stroke. Physical fitness (including cardiorespiratory fitness and muscle strength/power) can be improved by appropriate ...

  11. Isolation of PsPIN2 and PsAUX1 from etiolated pea epicotyls and their expression on a three-dimensional clinostat

    NASA Astrophysics Data System (ADS)

    Hoshino, Tomoki; Hitotsubashi, Reiko; Miyamoto, Kensuke; Tanimoto, Eiichi; Ueda, Junichi

    We isolated novel cDNAs containing the complete open reading frames of a putative auxin influx carrier, PsAUX1, and a putative auxin efflux carrier, PsPIN2, from etiolated pea epicotyls. High levels of homology were found on nucleotide and deduced amino acid sequences among PsPIN2, PsPIN1 (Accession No. AY222857) and AtPINs. Phylogenetic analyses based on deduced amino acid sequences revealed that PsPIN2 belonged to a subclade including AtPIN3, AtPIN4 and AtPIN7, while PsPIN1 belonged to the same clade as AtPIN1. The results were similar for PsAUX1 and AtAUX1, where PsAUX1 belongs to the same subclade as AtAUX1 and CS-AUX1. Expression of PsPIN1, PsPIN2 and PsAUX1 in pea epicotyl segments was promoted upon incubation of the segments with auxin (indole-3-acetic acid). In 3.5-d-old etiolated pea seedlings, relatively high expression of PsPIN1 and PsAUX1 was observed in the hook region, growing epicotyls and root tips as compared with those in mature regions of epicotyls and roots. Expression of PsPIN2 in roots was less than that in shoots. Simulated microgravity conditions on a three-dimensional clinostat remarkably increased gene expression of PsPIN1 and PsAUX1 in the hook and the internodes of pea epicotyls, but the increase in PsPIN2 was less. In contrast, polar auxin transport of pea epicotyls was substantially suppressed under simulated microgravity conditions on a 3D clinostat, similar to data from a space experiment on STS-95. These results suggest that PsPINs and PsAUX1 are auxin-inducible genes, and that the expression of PsPINs and PsAUX1 genes is sensitive to gravistimulation.

  12. Étude de l’activité virucide in vitro des Gouttes aux Essences® sur le virus para-influenzae de type 3

    Microsoft Academic Search

    L. Haddioui; B. Fabre; P. Bruel

    2009-01-01

    Résumé  Le traitement par les huiles essentielles des infections respiratoires limite le recours systématique aux antibiotiques (Phytothérapie\\u000a 6 (2004) 175–9). Plusieurs virus sont responsables de ces infections virales respiratoires: virus influenza, virus respiratoire\\u000a syncytial, virus para-influenzae, adénovirus, rhinovirus... Cette étude a consisté à mettre en évidence l’activité virucide\\u000a in vitro du produit Gouttes aux Essences®, complexe de cinq huiles essentielles vis-à-vis

  13. Etude sur les tendons en materiaux composites et leur application aux ancrages postcontraints

    NASA Astrophysics Data System (ADS)

    Chennouf, Adil

    L'objectif general de la presente these est d'evaluer le comportement a l'arrachement et au fluage d'ancrages injectes constitues de tendons en materiaux composites afin d'etablir des recommandations plus appropriees et realistes pour le dimensionnement et la conception. Quatre types de tendons en materiaux composites, deux a base de fibres d'aramide et deux a base de fibres de carbone, ont ete utilises dans l'etude. Les travaux de recherche de cette these ont porte notamment sur: (I) Une caracterisation physique et mecanique des tendons en materiaux composites utilises dans l'etude. (II) Une etude en laboratoire sur les coulis de scellement. La premiere etape de cette etude a concerne le developpement d'un coulis de scellement performant adapte aux tendons en materiaux composites et a differentes situations d'injection. La seconde etape a traite des essais de caracterisations physique et mecanique du coulis de scellement developpe comparativement a trois coulis de scellement usuels d'un meme rapport E/L de 0,4. (III) Une etude sur des modeles reduits d'ancrages injectes. (IV) Une etude sur des modeles d'ancrages a grande echelle. La synthese de ces etudes a permis d'enoncer les principales conclusions suivantes: (1) Les valeurs moyennes des charges de rupture des tendons en materiaux composites ont ete de 1% a 29% superieures a celles specifiees par les manufacturiers. (2) L'etude sur les coulis de scellement a permis le developpement de coulis de ciment repondant aux criteres fixes, soient une grande stabilite, une bonne fluidite, une legere expansion et de bonnes caracteristiques mecaniques. (3) Les tendons en materiaux composites ont montre des contraintes d'adherence maximum superieures a celles des tendons en acier. (4) Le type de fibre, la configuration et le fini de surface des tendons en materiaux composites gouvernent leur resistance a l'adherence. (5) L'introduction de sable et d'autres ajouts comme les fines de silice et la poudre d'aluminium au coulis de ciment a permis d'ameliorer la resistance a l'adherence. (6) Il existe une relation lineaire entre la charge maximum et la longueur ancree des tendons. Des equations sont proposees. (7) La capacite a l'arrachement des ancrages injectes augmente avec l'augmentation du module d'elasticite du milieu encaissant. (8) Les mono-tendons et multi-tendons en materiaux composites injectes sur 1000 mm ont montre des comportements a l'arrachement acceptables conformement aux codes. (9) Les rigidites apparentes des tendons a base de fibres d'aramide sont de trois a cinq fois inferieures a celles des tendons a base de fibres de carbone. (10) L'amorce de la decohesion en haut de la zone ancree ne semble se produire qu'au-dela d'une charge de 0,35 fpu pour les tendons a base de fibres de carbone alors qu'elle prend naissance des l'application de la charge pour les tendons a base de fibres d'aramide. (11) Le taux de fluage depend du niveau de chargement ainsi que des caracteristiques geometriques et mecaniques de l'ancrage (type de fibres, fini de surface, nombre de tendons, etc.). (12) Des equations regissant le comportement au fluage des tendons en materiaux composites ont ete etablies pour une periode d'essai de 60 mn. (Abstract shortened by UMI.)

  14. AXR2 Encodes a Member of the Aux/IAA Protein Family1 Punita Nagpal, Loni M. Walker2

    E-print Network

    Estelle, Mark

    AXR2 Encodes a Member of the Aux/IAA Protein Family1 Punita Nagpal, Loni M. Walker2 , Jeff C. Young, and find that it is the same as IAA7, a member of the IAA (indole-3-acetic acid) family of auxin-inducible genes. The axr2-1 mutation changes a single amino acid in conserved domain II of AXR2/IAA7. We isolated

  15. Projet de Note aux Comptes Rendus (17 ao^ut 2012) A Cramer-Rao inequality for non differentiable

    E-print Network

    Coudière, Yves

    Projet de Note aux Comptes Rendus (17 ao^ut 2012) A Cram´er-Rao inequality for non differentiable of the bound is related to the original Cram´er-Rao bound, although it does not require the differentiability of the model. Moreover, we show our efficiency bound to be always greater than the Cram´er-Rao bound in smooth

  16. Golfe Persique et mer Rouge : notes sur les routes de la cramique aux IX-XIIe sicles

    E-print Network

    Paris-Sud XI, Université de

    1 Golfe Persique et mer Rouge : notes sur les routes de la céramique aux IX-XIIe siècles Axelle : Société Française d'Etude de la Céramique Orientale, Musée Cernuschi. Le golfe Persique et la mer Rouge'Iran à partir du Golfe, ont successivement mis en place leurs propres réseaux avec la péninsule arabique

  17. Niveau socioéconomique et processus du recours aux soins par les familles de patients souffrant de troubles psychiques au Burkina Faso

    PubMed Central

    Yaogo, Ahmed; Sommer, Alain; Moulaï, Pierre; Chebili, Saïd; Abaoub-Germain, Agnès

    2014-01-01

    Introduction Le Burkina Faso a connu une amélioration constante depuis deux décennies de l'offre de soins en psychiatrie. De même, le taux d'alphabétisation sans cesse croissant s'accompagne d'une profonde modification des conceptions et des comportements. La présente étude visait à déterminer l?impact des déterminants socioéconomiques sur le processus du recours aux soins par les familles. Méthodes Il s'est agi d'une enquête transversale portant sur 200 familles, menée dans le service de psychiatrie du Centre Hospitalier Universitaire Yalgado Ouédraogo de Ouagadougou. Variable à expliquer: premier recours aux soins par les familles (guérisseur traditionnel ou prières religieuses vs. consultations psychiatrique ou médicale). Variable explicative: catégorie socioprofessionnelle classée en suivant la nomenclature des professions et catégories socioprofessionnelles; niveau d’études. L'analyse statistique a été effectuée à l'aide du logiciel SAS version 9.2. Le test du Khi deux a été utilisé. Résultats Il existait une association entre le choix du premier recours et la Profession et la catégorie socioprofessionnelledu « décideur » (p = 0.0006) ainsi que leniveau d’études du « décideur » (p = 0.0001). Conclusion La Profession et Catégorie Sociale et le niveau d'instruction scolaire pourraient être un marqueur important dans les politiques visant à optimiser les processus de recours aux soins des patients dans le circuit de soins. PMID:25161751

  18. B physics prospects at LHCb

    E-print Network

    Tomas Lastovicka

    2006-05-28

    The LHCb experiment at LHC is a single-arm spectrometer designed to pursue an extensive study of B physics and CP violation. In this contribution the physics which will be performed by LHCb is reviewed.

  19. Physical activity - preventive medicine (image)

    MedlinePLUS

    Physical activity contributes to health by reducing the heart rate, decreasing the risk for cardiovascular disease, and reducing ... loss that is associated with age and osteoporosis. Physical activity also helps the body use calories more efficiently, ...

  20. Physics: Encyclopedia of physics

    SciTech Connect

    Prokhorov, A.M.; Chomet, S.

    1988-01-01

    This Encylopedia provides some 3,100 detailed entries - illustrated with charts, graphs, and diagrams - spanning ''pure'' physics, astrophysics, radiophysics, plasma physics, superconductors, and more)

  1. Synthesis and thermoelectric properties of p-type Ba8AuxSi46-x clathrate

    NASA Astrophysics Data System (ADS)

    Saisho, Makoto; Bin, Liu; Nagatomo, Yuya; Nakakohara, Yusuke; Teranishi, Ryo; Munetoh, Shinji

    2012-08-01

    Poly-crystalline Ba8AuxSi46-x clathrates were synthesized by the arc melting method and a subsequent annealing treatment. The as-synthesized sample contained some precipitates rich in Au at the grain boundaries, and the precipitates were reduced by annealing at 1000 °C. The Au content of the clathrate phase for the as-synthesized sample, Ba7.4Au4.7Si41.3, was slightly lower than that for the stoichiometric composition, Ba8Au6Si40. In the annealed samples, the Au content of the clathrate phase increased with annealing time. These results indicated that Au can diffuse from Au-rich precipitates to the clathrate phase by annealing. The Seebeck coefficient of the as-synthesized and 1 hour annealed sample, Ba7.5Au5.7Si40.3, were -80 and +100 ?V/K at 500 °C, respectively. This suggested that the carrier type was changed by the Au content in the clathrate. In the samples annealed for longer than 1 hour, the Seebeck coefficient decreased with annealing time. This indicated that the hole carrier concentration increased in excess because of overdoping due to the diffusion of Au.

  2. Research in Physical Chemistry and Chemical Education: Part A--Water Mediated Chemistry of Oxidized Atmospheric Compounds Part B--The Development of Surveying Tools to Determine How Effective Laboratory Experiments Contribute to Student Conceptual Understanding

    ERIC Educational Resources Information Center

    Maron, Marta Katarzyna

    2011-01-01

    This dissertation is a combination of two research areas, experimental physical chemistry, Chapters I to V, and chemical education, Chapters VI to VII. Chapters I to V describe research on the water-mediated chemistry of oxidized atmospheric molecules and the impact that water has on the spectra of these environmental systems. The role of water…

  3. Statut phospho-calcique en hémodialyse chronique dans l’Oriental Marocain: évaluation de l’adhésion aux recommandations K/DOQI et KDIGO

    PubMed Central

    Benabdellah, Nawal; Karimi, Ilham; Bentata, Yassamine; Yacoubi, Hicham; Haddiya, Intissar

    2013-01-01

    Les troubles phosphocalciques sont fréquents en hémodialyse chronique. Leurs conséquences justifient une prévention et un traitement adaptés aux recommandations des sociétés savantes. L’objectif de notre étude était de déterminer le statut phosphocalcique de nos patients hémodialysés chroniques (HDC) et l’évaluation des taux de conformité des indicateurs aux recommandations K/DOQI et KDIGO. Ainsi, nous avons réalisé une étude transversale incluant les 83 patients HDC du centre d’hémodialyse de l’hôpital Al Farabi d’Oujda. L’âge moyen de nos patients était de 49.8± 15.6 ans. Une prédominance masculine a été notée. La conformité des indicateurs du bilan phosphocalcique chez nos patients hémodialysés chroniques par rapport aux recommandations KDIGO était de l’ordre de 21.6%. Le pourcentage des patients ayant des données phosphocalciques conformes aux cibles recommandées par les K/DOQI était Les patients répondants simultanément aux quatres critères recommandés par les K/DOQI n’étaient que 8.4%. PMID:24570784

  4. Physical and Microstructural Properties of Radio-Frequency Plasma-Enhanced Chemical Vapor Deposition Grown n-Type Phosphorus Doped Amorphous Carbon Films on the Contribution to Carbon-Based Solar Cells

    Microsoft Academic Search

    Mohamad Rusop; Hiroshi Ebisu; Mitsuhiro Adachi; Tetsuo Soga; Takashi Jimbo

    2005-01-01

    The physical and microstructural properties of phosphorus doped n-type amorphous carbon (n-C:P) films grown from a radio-frequency (rf) discharge in methane gas as a function of rf power (Prf) was previously determined, and their influence on the electronic properties is now analyzed. It is shown that Prf plays a major role in the deposition of n-C:P films. The Raman scattering,

  5. Engineering contributions to the life sciences

    Microsoft Academic Search

    L. A. Geddes

    2006-01-01

    This paper discusses the contributions that physicians have made to the physical sciences. Some of the physicians mentioned by the author are William Gilbert who gave the first accurate treatise on magnetism, Thomas Young who gave us Young's modulus was also the first to discover the interference of light waves, Luigi Galvani who started the study on current electricity and

  6. Minority Contributions to Science, Engineering, and Medicine.

    ERIC Educational Resources Information Center

    Funches, Peggy; And Others

    Offering an historical perspective on the development of science, engineering, medicine, and technology and providing current role models for minority students, the bulletin lists the outstanding contributions made by: (1) Blacks - medicine, chemistry, architecture, engineering, physics, biology, and exploration; (2) Hispanos - biomedical…

  7. Croissance Par Epitaxie EN Phase Vapeur aux Organo - et Caracterisation des Heterostructures Contraintes a Base de Phosphur de Indium

    Microsoft Academic Search

    Chuong Anh Tran

    1994-01-01

    Trois systemes heteroepitaxiaux a base de InP:InP\\/Si, InAs\\/InP et InAsP\\/InP ont ete fabriques par epitaxie en phase vapeur aux organo-metalliques (EPVOM)conventionelle. En plus l'epitaxie par couches atomiques (ECA) a ete utilisee pour fabriquer des puits quantiques ultra-minces et des superreseaux a courte periode InAs\\/InP. L'epitaxie de InP sur le silicium pose des problemes lies a un desaccord de maille de

  8. Genome-wide analysis of Aux/IAA gene family in Solanaceae species using tomato as a model.

    PubMed

    Wu, Jian; Peng, Zhen; Liu, Songyu; He, Yanjun; Cheng, Lin; Kong, Fuling; Wang, Jie; Lu, Gang

    2012-04-01

    Auxin plays key roles in a wide variety of plant activities, including embryo development, leaf formation, phototropism, fruit development and root initiation and development. Auxin/indoleacetic acid (Aux/IAA) genes, encoding short-lived nuclear proteins, are key regulators in the auxin transduction pathway. But how they work is still unknown. In order to conduct a systematic analysis of this gene family in Solanaceae species, a genome-wide search for the homologues of auxin response genes was carried out. Here, 26 and 27 non redundant AUX/IAAs were identified in tomato and potato, respectively. Using tomato as a model, a comprehensive overview of SlIAA gene family is presented, including the gene structures, phylogeny, chromosome locations, conserved motifs and cis-elements in promoter sequences. A phylogenetic tree generated from alignments of the predicted protein sequences of 31 OsIAAs, 29 AtIAAs, 31 ZmIAAs, and 26 SlIAAs revealed that these IAAs were clustered into three major groups and ten subgroups. Among them, seven subgroups were present in both monocot and dicot species, which indicated that the major functional diversification within the IAA family predated the monocot/dicot divergence. In contrast, group C and some other subgroups seemed to be species-specific. Quantitative real-time PCR (qRT-PCR) analysis showed that 19 of the 26 SlIAA genes could be detected in all tomato organs/tissues, however, seven of them were specifically expressed in some of tomato tissues. The transcript abundance of 17 SlIAA genes were increased within a few hours when the seedlings were treated with exogenous IAA. However, those of other six SlIAAs were decreased. The results of stress treatments showed that most SIIAA family genes responded to at least one of the three stress treatments, however, they exhibited diverse expression levels under different abiotic stress conditions in tomato seedlings. SlIAA20, SlIAA21 and SlIAA22 were not significantly influenced by stress treatments even though at least one stress-related cis-element was identified in their promoter regions. In conclusion, our comparative analysis provides an insight into the evolution and expression patterns in various tissues and in response to auxin or stresses of the Aux/IAA family members in tomato, which will provide a very useful reference for cloning and functional analysis of each member of AUX/IAA gene family in Solanaceae crops. PMID:22314799

  9. COURBES D'IONISATION DANS LE KRYPTON ET LE XNON PURS RELATIVES AUX RAYONS 03B1 DU POLONIUM

    E-print Network

    Paris-Sud XI, Université de

    COURBES D'IONISATION DANS LE KRYPTON ET LE X�NON PURS RELATIVES AUX RAYONS 03B1 DU POLONIUM Par R polonium dans le krypton et le xénon purs. Les parcours trouvés sont : RKr = 3,03 ± 0,01 cm; RXe = 2,17 ± 0 sont d'environ 30 pour 100 dans le krypton et de 40 pour 100 dans le xénon. Dans l'air la perte par

  10. Echo of the quantum phase transition of CeCu6-xAux in XPS: Breakdown of Kondo screening

    NASA Astrophysics Data System (ADS)

    Klein, M.; Kroha, J.; v. Löhneysen, H.; Stockert, O.; Reinert, F.

    2009-02-01

    We present an x-ray photoemission study of the heavy fermion system CeCu6-xAux across the magnetic quantum phase transition of this compound at temperatures above the single-ion Kondo temperature TK . In dependence of the Au concentration x we observe a sudden change in the f -occupation number nf and the core-hole potential Udf at the critical concentration xc=0.1 . We interpret these findings in the framework of the single-impurity Anderson model. Our results are in excellent agreement with findings from earlier ultraviolet photoemission spectroscopy measurements and provide further information about the precursors of quantum criticality at elevated temperatures.

  11. Contribution of intermediate submicrometer structures to physical properties near Tc in Pb(Zn1/3Nb2/3)O3-9%PbTiO3

    NASA Astrophysics Data System (ADS)

    Ohwada, Kenji; Mizuki, Jun'Ichiro; Namikawa, Kazumichi; Matsushita, Mitsuyoshi; Shimomura, Susumu; Nakao, Hironori; Hirota, Kazuma

    2011-06-01

    Complementary use of coherent x-ray diffraction (CXD), x-ray diffuse scattering, conventional x-ray diffraction techniques, and dielectric measurements has enabled us to investigate Pb(Zn1/3Nb2/3)-9%PbTiO3 with a multiple-length-scale approach from the macroscale (lattice constants, bulk averaged) and microscale to the nanoscale [polar nanoregions (PNRs)] and discuss the contribution of each scale to the dielectric permittivity. We estimate that diffuse scattering mainly originates from intra-PNR dynamics, which contributes to “ionic” polarization and results in high-frequency permittivity. Meanwhile, the appearance of intermediate submicrometer (sub-?m) structures observed by CXD is consistent with the appearance of low-frequency dielectric relaxation. The sub-?m structures exhibit large fluctuations at Tc. This is also consistent with previously reported results obtained by x-ray intensity fluctuation spectroscopy and should give a lower limit for the low-frequency dielectric dispersion. We have suggested that the fluctuation is due to the competition between the growth of sub-?m structures and the appearance of the macroscopic tetragonal-ferroelectric phase. Since the present CXD mainly detected the strain field spreading throughout the crystal, we here demonstrate that the sub-?m structures are due to networks among PNRs connected by the strain field.

  12. Mathematics: Contributions by Women.

    ERIC Educational Resources Information Center

    Dewar, Jacqueline M.

    1991-01-01

    Describes a core course in a women's-studies program at Loyola Marymount University. Provides information, resources, and an annotated bibliography useful for making students more aware of women's contributions to mathematics. Contains 38 references. (ASK)

  13. Knowledge Digraph Contribution (KDC)

    E-print Network

    Golden, Richard M.

    1 Knowledge Digraph Contribution (KDC) Analysis Software Tutorial Richard Golden School the sequential order of response data items to identify which sequential regularities (i.e.,"digraphs, estimate digraph parameters for individual participants for the purpose of investigating individual

  14. Librer et cologiser les sciences sociales (Foyer Jean, ISCC) Version longue de l'article publi dans Hemes n60, Edgar Morin aux risques d'une pense libre.

    E-print Network

    Paris-Sud XI, Université de

    dans Hemes n°60, Edgar Morin aux risques d'une pensée libre. Introduction : Edgar Morin est en passe d j'ai fait référence aux écrits d'Edgar Morin comme l'une des inspirations fondamentales de mon : en quoi la pensée d'Edgar Morin peut-elle être utile à un (jeune) chercheur en science sociale ? En

  15. Measuring Physical Activity Environments

    PubMed Central

    Sallis, James F.

    2010-01-01

    Physical activity is usually done in specific types of places, referred to as physical activity environments. These often include parks, trails, fitness centers, schools, and streets. In recent years, scientific interest has increased notably in measuring physical activity environments. The present paper provides an historical overview of the contributions of the health, planning, and leisure studies fields to the development of contemporary measures. The emphasis is on attributes of the built environment that can be affected by policies to contribute to the promotion of physical activity. Researchers from health fields assessed a wide variety of built environment variables expected to be related to recreational physical activity. Settings of interest were schools, workplaces, and recreation facilities, and most early measures used direct observation methods with demonstrated inter-observer reliability. Investigators from the city planning field evaluated aspects of community design expected to be related to people’s ability to walk from homes to destinations. GIS was used to assess walkability defined by the 3Ds of residential density, land-use diversity, and pedestrian-oriented designs. Evaluating measures for reliability or validity was rarely done in the planning-related fields. Researchers in the leisure studies and recreation fields studied mainly people’s use of leisure time rather than physical characteristics of parks and other recreation facilities. Although few measures of physical activity environments were developed, measures of aesthetic qualities are available. Each of these fields made unique contributions to the contemporary methods used to assess physical activity environments. PMID:19285214

  16. Darwin's contributions to genetics.

    PubMed

    Liu, Y-S; Zhou, X-M; Zhi, M-X; Li, X-J; Wang, Q-L

    2009-01-01

    Darwin's contributions to evolutionary biology are well known, but his contributions to genetics are much less known. His main contribution was the collection of a tremendous amount of genetic data, and an attempt to provide a theoretical framework for its interpretation. Darwin clearly described almost all genetic phenomena of fundamental importance, such as prepotency (Mendelian inheritance), bud variation (mutation), heterosis, reversion (atavism), graft hybridization (Michurinian inheritance), sex-limited inheritance, the direct action of the male element on the female (xenia and telegony), the effect of use and disuse, the inheritance of acquired characters (Lamarckian inheritance), and many other observations pertaining to variation, heredity and development. To explain all these observations, Darwin formulated a developmental theory of heredity - Pangenesis - which not only greatly influenced many subsequent theories, but also is supported by recent evidence. PMID:19638672

  17. EDITORIAL: Physics competitions Physics competitions

    NASA Astrophysics Data System (ADS)

    Jordens, H.; Mathelitsch, L.

    2010-07-01

    This editorial opens the second special section on physics competitions in European Journal of Physics. In the first section last year, we asked for feedback on the idea of such a section and on the content of the articles. We received no answer whatsoever, which can be interpreted in two ways: the section is not interesting enough to raise motivation for feedback, or the reader is satisfied. Having no indication which scenario is the correct one, we are optimistic and favour the second. The section at hand contains three articles. Again, as last year, the organizer of the annual Olympiad reports on tasks and outcomes of this competition. The Olympiad took place in Merida, Mexico, and was by far the largest event with 316 contestants from 68 countries. Again, the predominance of Asian/Chinese students was manifest, showing how serious the training is taken by both their authorities and students. Unfortunately, the winners of the last International Young Physicists' Tournament (IYPT), the team from Korea, did not accept the offer to report on their prize-winning contribution. We are thankful that two students from Austria, who achieved second place with their team, took over and reported on the task which they presented in the finals of the competition. It connects the fields of sport and physics and explains a special move in skateboarding. The third contribution introduces a different competition, 'International Conference of Young Scientists'. On one hand, as in the Olympiad, it addresses individuals, not teams. On the other, as in the IYPT, students have several months to prepare and also the quality of the presentation is an important element of the judgment. In fact, this competition comes closer to real scientific research compared to the other events. Finally and again, we hope that this section will serve several purposes: To show the competitions as a very important tool in the support of gifted students. To raise awareness amongst university teachers, and to help bridge the gap between physics teaching at schools and university. To point out that the tasks in these competitions are often suitable for university labs and as exercises. For more information, please consult the following websites: Physics Olympiad: http://ipho.phy.ntnu.edu.tw IYPT: http://www.iypt.org/new ICYS: http://metal.elte.hu/~icys/

  18. Les managers de proximité et les changements : quels sont les difficultés, les rôles et les comportements des Chefs de groupe face aux changements organisationnels ?

    Microsoft Academic Search

    Jérémy Vignal

    2011-01-01

    Alors que les organisations sont de plus en plus souvent confrontées à des problématiques de changements, le taux de réussite de leur mise en oeuvre reste relativement faible. De par leur positionnement particulier dans l'organisation, les managers de proximité ont une incidence forte sur la réussite ou l'échec des changements. Or, la littérature consacrée aux changements ne traite que très

  19. 0.1 Contenus des cours proposes en M1 dans BIM En premi`ere annee, il existe quatre modules obligatoires (2 assures aux pre-

    E-print Network

    Arleo, Angelo

    0.1 Contenus des cours propos´es en M1 dans BIM En premi`ere ann´ee, il existe quatre modules- tidisciplinarit´e de BIM. Ces cours allient toujours de la Biologie aux concepts d'Informatique ou de Math´ecialit´e : BIM 6 ECTS Niveau : 400 Semestre : 1 Responsable : Alessandra Carbone et Martine Boccara R

  20. Manuscrit auteur publi dans Urbanisme, dossier villes indiennes, n355, juillet-aot 2007, Dynamiques d'urbanisation : des megacities aux villages urbains

    E-print Network

    Paris-Sud XI, Université de

    -50 1 Dynamiques d'urbanisation : des megacities aux villages urbains Kamala Marius-Gnanou1 et François. Moriconi-Ebrard (http://ifpindia.org/Built-Up-Areas-in-India-e- GEOPOLIS.html ) 4 Dans les frontières

  1. Enseigner la France en gographie aux jeunes coliers (1788-2008) Teaching geography at school to teach France to the young pupils (1788-

    E-print Network

    Boyer, Edmond

    Enseigner la France en géographie aux jeunes écoliers (1788-2008) Teaching geography at school to teach France to the young pupils (1788- 2008) Summary For the last two centuries, the ways of teaching geography of France to the young French pupils from 9 to 11 years old have known many transformations

  2. La micro-finance est-elle une solution efficace aux causes du rationnement bancaire ? Une analyse conomtrique travers les modles probit et binomial ngatif : Le cas du

    E-print Network

    Paris-Sud XI, Université de

    business) social capital (same sex, same ethnic group), informal sources of credit (itinerant bankers1 La micro-finance est-elle une solution efficace aux causes du rationnement bancaire ? Une analyse des pairs, activités similaires), le capital social (même sexe, même ethnie), les sources informelles

  3. Segr (Gabriel). Au nom du King. Elvis, les fans et l'ethnologue. Montreuil. Aux lieux d'tre (enqutes), 2007, 139 p., 12 .

    E-print Network

    Paris-Sud XI, Université de

    1 Segré (Gabriel). ­ Au nom du King. Elvis, les fans et l'ethnologue. Montreuil. Aux lieux d'ethnologue Gabriel Segré livre un nouvel ouvrage sur le « phénomène Presley » et les groupes de fans. Sous le titre Au nom du king. Elvis, les fans et l'ethnologue, ce livre regroupe en dix-huit chapitres des notes d

  4. Physics in perspective, volume 1

    NASA Technical Reports Server (NTRS)

    1972-01-01

    Progress in physics and its subfields is presented and the contribution of physics is related to progress in other scientific disciplines and the manner in which these have been utilized by our civilization. The future course of endeavor in the various subfields of physics and the extent to which these will require resources of manpower, facilities, and funding are discussed. The rational responses of the total research effort in physics to alternative funding levels are assayed.

  5. Avicenna's contribution to cardiology

    PubMed Central

    Chamsi-Pasha, Mohammed A.R.; Chamsi-Pasha, Hassan

    2014-01-01

    Ibn Sina, known in the West as Avicenna, was the most famous and influential of all the Islamic philosopher-scientists. His most important medical works are the Canon of Medicine medical encyclopedia and a treatise on cardiac drugs. His Canon of Medicine remained the standard text in both the East and West until the 16th century. Avicenna's description of cardiac diseases was logically presented perhaps for the first time in the history of medicine. Avicenna was the first to describe carotid sinus hypersensitivity, which presents with vasovagal syncope. He was a pioneer in pulsology and the first correct explanation of pulsation was given by Avicenna, after he refined Galen's theory of the pulse. Besides, he discussed the action of available drugs on the heart in details and mentioned their indications and contraindications. In conclusion, Avicenna made important contributions to cardiology. This article describes some of his contributions in this field. PMID:24678465

  6. Stueckelberg and Molecular Physics

    NASA Astrophysics Data System (ADS)

    Lacki, Jan

    The first period of E. C. G. Stueckelberg's scientific career was marked by important contributions he made to molecular physics.1 After publishing his thesis in 1927 in Basel [1] Stueckelberg joined the prestigious Palmer Physical Laboratory in Princeton where he worked under the guidance of Karl Taylor Compton, brother of Arthur Holly Compton. Stueckelberg owed this position devoted several papers to problems of molecular physics. Stueckelberg had the benefit at Princeton of exchanges with other gifted members of the Palmer Physical Laboratory, Philip M. Morse and E. U. Condon among others.3 to a recommendation by A. Sommerfeld.2 In this stimulating environment, he devoted several papers to problems of molecular physics. Stueckelberg had the benefit at Princeton of exchanges with other gifted members of the Palmer Physical Laboratory, Philip M. Morse and E. U. Condon among others.3

  7. Physics for Physical Sciences

    NSDL National Science Digital Library

    Dicker, Jason

    Created by Jason Dicker at Launceston College in Tasmania, these materials present information and examples of the physics concepts of radioactivity, motion, and current electricity. The Radioactivity portion contains sections on natural types of radioactivity, radioactive decay, and problems for students such as designing "a series of experiments to show that 'radioactivity' has nothing to do with sunlight" without using a Geiger counter. The Motion portion contains pages about vectors, projectile motion, momentum, and force. The final section, Current Electricity, has links to pages about charge and current, voltage, resistance, and some problems about electricity for students to solve. This is an excellent resource for physics educators in higher education to use to explain physics principles in the physical sciences.

  8. CONTRIBUTIONS REGARDING THE MANAGEMENT OF THE EFFECTS OF GLOBAL WARMING

    Microsoft Academic Search

    Gabriela PRELIPCEAN; Angela Cozorici; Mariana LUPAN

    2011-01-01

    The paper contains analyses about the effects of global warming and climate change. The impacts of climate change may be physical,ecological, social or economic. Evidence of observed climate change includes the increasing temperature, CO2 emissions, droughts, floods, etc. Human activities have contributed to a number of the observed changes in climate. This contribution has principally been through the burning of

  9. Johannes Kepler and his contribution to Applied Mathematics

    Microsoft Academic Search

    Franz Pichler

    1998-01-01

    The worldwide renown of Johannes Kepler is based above all on his contribution to astronomy. The 3 Kepler's Laws relating to the planets are well known and will ensure that his name is remembered by future generations. Besides his astronomical work, Kepler also made important contributions in the fields of theology, physics, phylosophy and mathematics. The actual paper discusses the

  10. Stueckelberg and Molecular Physics

    Microsoft Academic Search

    Jan Lacki

    2009-01-01

    The first period of E. C. G. Stueckelberg’s scientific career was marked by important contributions he made to molecular physics.1 After publishing his thesis in 1927 in Basel [1] Stueckelberg joined the prestigious Palmer Physical Laboratory in Princeton\\u000a where he worked under the guidance of Karl Taylor Compton, brother of Arthur Holly Compton. Stueckelberg owed this position\\u000a devoted several papers

  11. The Physical Tourist

    Microsoft Academic Search

    Wolfgang Schreier; Karl-Heinz Schlote

    2008-01-01

    We provide a tour of Leipzig, one of the cultural centers of Germany that contributed a significant chapter in the history\\u000a of physics. In the nineteenth century the city and University of Leipzig were home to one of the oldest physical institutes\\u000a in Germany, and in the late 1920s the arrival of Werner Heisenberg (1901-1976), Peter Debye (1884-1966), and Friedrich

  12. An improved technique for modeling initial reservoir hydrocarbon saturation distributions: Applications in Illinois (USA) aux vases oil reservoirs

    USGS Publications Warehouse

    Udegbunam, E.; Amaefule, J.O.

    1998-01-01

    An improved technique for modeling the initial reservoir hydrocarbon saturation distributions is presented. In contrast to the Leverett J-function approach, this methodology (hereby termed flow-unit-derived initial oil saturation or FUSOI) determines the distributions of the initial oil saturations from a measure of the mean hydraulic radius, referred to as the flow zone indicator (FZI). FZI is derived from porosity and permeability data. In the FUSOI approach, capillary pressure parameters, S(wir), P(d), and ??, derived from the Brooks and Corey (1966) model [Brooks, R.H., Corey, A.T., 1966. Hydraulic properties of porous media, Hydrology Papers, Colorado State Univ., Ft. Collins, No. 3, March.], are correlated to the FZI. Subsequent applications of these parameters then permit the computation of improved hydrocarbon saturations as functions of FZI and height above the free water level (FWL). This technique has been successfully applied in the Mississippian Aux Vases Sandstone reservoirs of the Illinois Basin (USA). The Aux Vases Zeigler field (Franklin County, IL, USA) was selected for a field-wide validation of this FUSOI approach because of the availability of published studies. With the initial oil saturations determined on a depth-by-depth basis in cored wells, it was possible to geostatistically determine the three-dimensional (3-D) distributions of initial oil saturations in the Zeigler field. The original oil-in-place (OOIP), computed from the detailed initialization of the 3-D reservoir simulation model of the Zeigler field, was found to be within 5.6% of the result from a rigorous material balance method.An improved technique for modeling the initial reservoir hydrocarbon saturation distributions is presented. In contrast to the Leverett J-function approach, this methodology (hereby termed flow-unit-derived initial oil saturation or FUSOI) determines the distributions of the initial oil saturations from a measure of the mean hydraulic radius, referred to as the flow zone indicator (FZI). FZI is derived from porosity and permeability data. In the FUSOI approach, capillary pressure parameters, Swir, Pd, and ??, derived from the Brooks and Corey (1966) model, are correlated to the FZI. Subsequent applications of these parameters then permit the computation of improved hydrocarbon saturations as functions of FZI and height above the free water level (FWL). This technique has been successfully applied in the Mississippian Aux Vases Sandstone reservoirs of the Illinois Basin (USA). The Aux Vases Zeigler field (Franklin County, IL, USA) was selected for a field-wide validation of this FUSOI approach because of the availability of published studies. With the initial oil saturations determined on a depth-by-depth basis in cored wells, it was possible to geostatistically determine the three-dimensional (3-D) distributions of initial oil saturations in the Zeigler field. The original oil-in-place (OOIP), computed from the detailed initialization of the 3-D reservoir simulation model of the Zeigler field, was found to be within 5.6% of the result from a rigorous material balance method.

  13. 75 FR 43799 - Employee Contribution Elections and Contribution Allocations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-07-27

    ...default employee contributions made on his or her behalf. In contrast, section 1600.34...default employee contribution made to his or her account. However, the amount of the refund...employee contributions or change his or her contribution percentage or amount at...

  14. Estimating areas contributing recharge to wells, lessons from previous studies

    USGS Publications Warehouse

    Franke, O. Lehn; Reilly, T.E.; Pollock, D.W.; LaBaugh, J.W.

    1998-01-01

    Factors relating to the estimation of areas contributing recharge to wells, such as complexity of the ground-water flow system, effects of changing hydrologic conditions, and effects of well-screen locations and pumping rates, are reviewed. The point of view that simulation is the best means to obtain physically based estimates of contributing areas is emphasized. An extensive list of USGS reports that include estimation of contributing areas is provided.

  15. Collins Mechanism Contributions to Single Spin Asymmetry

    SciTech Connect

    Yuan,F.

    2009-05-26

    We present recent developments on the single transverse spin physics, in particular, the Collins mechanism contributions in various hadronic reactions, such as semi-inclusive hadron production in DIS process, azimuthal distribution of hadron in high energy jet in pp collisions. We will demonstrate that the transverse momentum dependent and collinear factorization approaches are consistent with each other in the description of the Collins effects in the semi-inclusive hadron production in DIS process.

  16. Collins Mechanism Contributions to Single Spin Asymmetry

    SciTech Connect

    Yuan, Feng

    2009-09-11

    We present recent developments on the single transverse spin physics,in particular, the Collins mechanism contributions in various hadronic reactions,such as semi-inclusive hadron production in DIS process, azimuthal distributionof hadron in high energy jet in pp collisions. We will demonstrate thatthe transverse momentum dependent and collinear factorization approaches areconsistentwith each other in the description of the Collins effects in the semi-inclusivehadron production in DIS process.

  17. Collins Mechanism Contributions to Single Spin Asymmetry

    SciTech Connect

    Yuan,F.

    2009-05-25

    We present recent developments on the single transverse spin physics, in particular, the Collins mechanism contributions in various hadronic reactions, such as semi-inclusive hadron production in DIS process, azimuthal distribution of hadron in high energy jet in pp collisions. We will demonstrate that the transverse momentum dependent and collinear factorization approaches are consistent with each other in the description of the Collins effects in the semi-inclusive hadron production in DIS process.

  18. Students' Daily Physical Activity Behaviors: The Role of Quality Physical Education in a Comprehensive School Physical Activity Program

    ERIC Educational Resources Information Center

    Chen, Wiyun; Hypnar, Andrew J.; Mason, Steve A.; Zalmout, Sandy

    2014-01-01

    The purpose of this study was to examine the contribution of quality physical education (QPET) in a Comprehensive School Physical Activity Program (CSPAP) which is intended to promote physical activity (PA) behaviors in and outside of schools. Participants were nine elementary physical education teachers and their fourth- and fifth-grade students…

  19. Activities contributing to energy expenditure among Guatemalan adults

    Microsoft Academic Search

    Cria O Gregory; Manuel Ramirez-Zea; Reynaldo Martorell; Aryeh D Stein

    2007-01-01

    BACKGROUND: Guatemala has experienced a substantial increase in overweight and obesity in recent years, yet physical activity patterns and consequent energy expenditure are largely unexplored in this population. METHODS: To describe overall physical activity levels (PAL) and activities contributing to daily energy expenditure, we analyzed time spent in daily activities as reported by 985 women and 819 men, living in

  20. A Profile of Corporate Contributions.

    ERIC Educational Resources Information Center

    Smith, Hayden W.

    The extent and distribution of charitable contributions by corporations were studied. In addition to a history of giving from 1936 to 1981, information is presented on corporate contributions in 1977 in terms of the distribution of companies (1) by size of contributions, (2) by contributions as percentage of net income, (3) by industry, and (4) by…

  1. Flavor Physics and CP Violation at LHC

    E-print Network

    Andreas Schopper

    2006-05-29

    Flavor Physics at LHC will contribute significantly to the search for New Physics via precise and complementary measurements of CKM angles and the study of loop decays. Here we present the expected experimental sensitivity and physics performance of the LHC experiments that will to B-physics.

  2. @Why Physics Comprehensive Physics Major.

    E-print Network

    Yoo, S. J. Ben

    @Why Physics Comprehensive Physics Major. From the basic laws of physics to the resulting emergent behavior, physics studies what the universe is made of and how it works. As a Physics major that surrounds us, to the structure and evolution of the entire universe. We offer three degrees in Physics

  3. Casimir effect in dielectrics: Surface area contribution

    SciTech Connect

    Molina-Paris, C. [Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Visser, M. [Physics Department, Washington University, St. Louis, Missouri 63130-4899 (United States)

    1997-11-01

    In this paper we take a deeper look at the technically elementary but physically robust viewpoint in which the Casimir energy in dielectric media is interpreted as the change in the total zero-point energy of the electromagnetic vacuum summed over all states. Extending results presented in previous papers we approximate the sum over states by an integral over the density of states {ital including finite volume corrections}. For an arbitrarily shaped finite dielectric, the first finite-volume correction to the density of states is shown to be proportional to the surface area of the dielectric interface and is explicitly evaluated as a function of the permeability and permitivity. Since these calculations are founded in an elementary and straightforward way on the underlying physics of the Casimir effect they serve as an important consistency check on field-theoretic calculations. As a concrete example we discuss Schwinger{close_quote}s suggestion that the Casimir effect might be the underlying physical basis behind {ital sonoluminescence}. The recent controversy concerning the relative importance of volume and surface contributions is discussed. For sufficiently large bubbles the volume effect is always dominant. Furthermore we can explicitly calculate the surface area contribution as a function of refractive index. {copyright} {ital 1997} {ital The American Physical Society}

  4. Physical Activities for Preschool.

    ERIC Educational Resources Information Center

    Adkins, Dorothy C.; And Others

    The underlying premise of the University of Hawaii Physical Activities for Preschool curriculum is that important contributions to a positive self-concept are made by motor independence and a realistic body image. Program objectives include: (1) the development of strength, endurance, and flexibility in skills that involve the muscles,…

  5. Semantic physical science

    PubMed Central

    2012-01-01

    The articles in this special issue arise from a workshop and symposium held in January 2012 (Semantic Physical Science’). We invited people who shared our vision for the potential of the web to support chemical and related subjects. Other than the initial invitations, we have not exercised any control over the content of the contributed articles. PMID:22856527

  6. MILESTONES IN SOIL PHYSICS

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This special issue of “Soil Science“ celebrates the enormous accomplishments made during the past century or more in the field of soil science, including some of the key articles published in Soil Science during its 90 years of existence. In this article, we focus on the contributions in soil physic...

  7. Energy assessment: physical activity

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Physical activity is an important component of total energy expenditure, contributing to energy intake needs; it also provides certain health benefits. This review chapter provides state-of-the-art information to researchers and clinicians who are interested in developing research studies or interv...

  8. Physical Education: Essential Issues

    ERIC Educational Resources Information Center

    Green, Ken, Ed.; Hardman, Ken, Ed.

    2005-01-01

    This book is aimed primarily at under and postgraduate students pursuing entire programmes or discrete courses and modules in the broad area of physical education and sport in schools. It consists of a collection of what is considered to be essential readings in the sense that they are contributions from eminent authors on a breadth of salient…

  9. Computations in Plasma Physics.

    ERIC Educational Resources Information Center

    Cohen, Bruce I.; Killeen, John

    1983-01-01

    Discusses contributions of computers to research in magnetic and inertial-confinement fusion, charged-particle-beam propogation, and space sciences. Considers use in design/control of laboratory and spacecraft experiments and in data acquisition; and reviews major plasma computational methods and some of the important physics problems they…

  10. Physical Changes

    NSDL National Science Digital Library

    Mr. Jolley

    2005-10-29

    After completing this tutorial you should be able to identify a physical change as well as describe what happens to a substance that undergoes a phase change. Physical changes cause a change in the physical properties of a substance without changing what the substance actually is. Physical Change Definition What are some common physical properties? Physical Properties You\\'ve already learned about chemical properties and changes. Now test your knowledge of physical and chemical properties. Physical Properties Quiz An important physical change is a phase change. Go to ...

  11. Quark Flavor Physics Review

    E-print Network

    Aida X. El-Khadra

    2014-03-20

    I review the status of lattice-QCD calculations relevant to quark flavor physics. The recent availability of physical-mass ensembles with large physical volumes generated by a growing number of lattice collaborations is an exciting development and I discuss their impact on the landscape of lattice flavor physics calculations. The activities of the newly formed FLAG-2 collaboration which provides averages of quantities calculated in lattice QCD that are relevant for quark flavor physics are also discussed. My talk covers (a subset of) the same quantities reviewed by FLAG-2, including results for $K$, $D_{(s)}$, and $B_{(s)}$ meson decay constants and semileptonic decay form factors, as well as for hadronic matrix elements of neutral ($K$, $D$, and $B_{(s)}$) meson mixing. I also briefly discuss recent progress towards understanding nonleptonic $K$ decay and long-distance contributions to $\\Delta m_K$.

  12. Contribution of resonance tunneling of molecule to physical observables

    E-print Network

    P. M. Krassovitskiy; F. M. Pen'kov

    2014-12-12

    Probabilities of resonant tunneling through a potential barrier are compared for a rigid molecule and an excited molecule. It is shown that the resonance spectrum is mainly governed by the transmission resonance spectrum of the rigid molecule. Analytical expressions for the probability for the tunneling of the rigid molecule through a barrier allow resonance-spectrum-averaged observables, including quantum diffusion, to be estimated.

  13. Econophysics: can statistical physics contribute to the science of economics?

    NASA Astrophysics Data System (ADS)

    Amaral, L. A. N.; Cizeau, P.; Gopikrishnan, P.; Liu, Y.; Meyer, M.; Peng, C.-K.; Stanley, H. E.

    1999-09-01

    We address a current question in econophysics: Are fluctuations in economic indices correlated? To this end, we analyze 1-minute data on a stock index, the Standard and Poor index of the 500 largest stocks. We extend the 6-year data base studied by Mantegna and Stanley by including the 13 years 1984-1996 inclusive, with a recording frequency of 15 seconds. The total number of data points in this 13 years period exceed 4.5 million, which allows for a very detailed statistical analysis. We find that the fluctuations in the volatility are correlated, and that the correlations are well described by a power law. We also briefly describe some recent scaling results in economics, specifically some surprising features that appear to be common to the growth rates of business firms, countries, research budgets, and bird populations.

  14. Could Applied Physics and Industry contribute to Increase of GDP?

    NASA Astrophysics Data System (ADS)

    Gaina, Alex

    2006-11-01

    It is explained that the accentuation on the agriculture could not increase significantly the GDP/capita in the Republic of Moldova, while the revival of the branches of industry, which were developed in the former Moldavian S.S.R., such as microelectronics, hidropumping will increase singnificantly the GDP.

  15. Sports physical

    MedlinePLUS

    A person gets a sports physical by a doctor to find out if it's safe to start a new sport or a new sports season. Most states require a sports physical before children and teens can play. Sports physicals ...

  16. Reports | Physical Sciences in Oncology

    Cancer.gov

    Contributions from outside the field of cancer biology are the cornerstone of the Physical Sciences in Oncology initiative. In order to gather ideas and suggestions from the research community about the latest science and new opportunities, the NCI organizes Workshops and Think Tanks that bring together thought leaders from the fields of cancer biology, physics, chemistry, mathematics, modeling, engineering, and nanotechnology.

  17. DEPARTMENT OF PHYSICS Physics 32300

    E-print Network

    Lombardi, John R.

    DEPARTMENT OF PHYSICS Syllabus Physics 32300 Quantum Mechanics for Engineers Designation: required for Physics majors in the Applied Physics Option Undergraduate Catalog description: Basic experiments, wave: Physics 20700 and 20800, Math 39100 and Math 39200 Textbook and other suggested material: Scherrer

  18. DEPARTMENT OF PHYSICS Physics 42200

    E-print Network

    Lombardi, John R.

    DEPARTMENT OF PHYSICS Syllabus Physics 42200 Biophysics Designation: Undergraduate Catalog and membranes. In depth study of the physical basis of selected systems including vision, nerve transmission. Prerequisites: Prereq.: 1 yr. of Math, 1 yr. of Physics (elective for Physics Majors and Biomedical Engineering

  19. Phenotypes associated with down-regulation of Sl-IAA27 support functional diversity among Aux/IAA family members in tomato.

    PubMed

    Bassa, Carole; Mila, Isabelle; Bouzayen, Mondher; Audran-Delalande, Corinne

    2012-09-01

    The phytohormone auxin is known to regulate several aspects of plant development, and Aux/IAA transcription factors play a pivotal role in auxin signaling. To extend our understanding of the multiple functions of Aux/IAAs further, the present study describes the functional characterization of Sl-IAA27, a member of the tomato Aux/IAA gene family. Sl-IAA27 displays a distinct behavior compared with most Aux/IAA genes regarding the regulation of its expression by auxin, and the Sl-IAA27-encoded protein harbors a unique motif of unknown function also present in Sl-IAA9 and remarkably conserved in monocot and dicot species. Tomato transgenic plants underexpressing the Sl-IAA27 gene revealed multiple phenotypes related to vegetative and reproductive growth. Silencing of Sl-IAA27 results in higher auxin sensitivity, altered root development and reduced Chl content in leaves. Both ovule and pollen display a dramatic loss of fertility in Sl-IAA27 down-regulated lines, and the internal anatomy of the flower and the fruit are modified, with an enlarged placenta in smaller fruits. In line with the reduced Chl content in Sl-IAA27 RNA interference (RNAi) leaves, genes involved in Chl synthesis display lower expression at the level of transcript accumulation. Even though Sl-IAA27 is closely related to Sl-IAA9 in terms of sequence homology and the encoded proteins share common structural features, the data indicate that the two genes regulate tomato fruit initiation and development in a distinct manner. PMID:22764281

  20. COMMUNIQU DE PRESSE I PARIS -MARSEILLE I 25 AOUT 2014 Les glaciers tropicaux ont ragi aux coups de froid de l'Antarctique et du Groenland au

    E-print Network

    van Tiggelen, Bart

    + COMMUNIQU� DE PRESSE I PARIS - MARSEILLE I 25 AOUT 2014 Les glaciers tropicaux ont réagi aux-Unis, de Colombie et du Royaume-Uni. Leur étude, menée sur 21 glaciers andins, est publiée le 24 août 2014 sur le site de la revue Nature. Comme ailleurs sur la planète, les glaciers des tropiques (situés de

  1. COMMUNIQU DE PRESSE NATIONAL I PARIS I 24 AOUT 2014 Les glaciers tropicaux ont ragi aux coups de froid de l'Antarctique et du Groenland au

    E-print Network

    PARIS I 24 AOUT 2014 Les glaciers tropicaux ont réagi aux coups de froid de l'Antarctique et du-Uni. Leur étude, menée sur 21 glaciers andins, est publiée le 24 août 2014 sur le site de la revue Nature. Comme ailleurs sur la planète, les glaciers des tropiques (situés de part et d'autre de l

  2. Bienvenue aux quipes fminines et masculines U9, U10 (7 contre 7), U11 (9 contre 9) et U12 (11 contre 11).

    E-print Network

    Charette, André

    e édition Bienvenue aux équipes féminines et masculines U9, U10 (7 contre 7), U11 (9 contre 9) et U soccer des Carabins. Dates U9, U10 et U11 : 11 mai U12 : 12 mai Lieu CEPSUM 2100, boul. Édouard à la saison 9 #12;Tarifs U9 et U10 : 250$ par équipe / 225$ avant le 1er mars 2013 U11 et U12 : 300

  3. L'Universit d'Ottawa s'est associe Western Union Solutions d'affaires pour offrir aux tudiants trangers un

    E-print Network

    Petriu, Emil M.

    L'Université d'Ottawa s'est associée àWestern Union Solutions d'affaires pour offrir aux étudiants sera ensuite convertie en dollars canadiens. · Western Union Solutions d'affaires et l'Université d les fonds à Western Union Solutions d'affaires. �tape 4 : Attendez la confirmation du paiement · L

  4. Practical Physics

    NSDL National Science Digital Library

    2012-08-17

    The Nuffield Foundation was created in 1943 by William Morris, the founder of Morris Motors. He wanted to contribute to improvements in society, primarily the "advancement of social well-being." According to the site, he "emphasised the importance of education, training and research in achieving that goal." This website, created by the Foundation, is a logical extension of his work, containing practical activities designed for use in the classroom with students in high school and college. The activities here are arranged into a dozen topics, including Astronomy, Atoms and nuclei, and Physics applications. The activities here include "Hearing a laser beam," "What's the frequency?," and 75 others that use video clips, interactive graphics, and other visual materials to make these concepts and principles come alive. The Forces and Motion area is one of the best, as it is host to activities that really delve into the concepts of speed, velocity, and acceleration. Visitors can also use the search engine to look for specific items of interest.

  5. Radiation Oncology Physics and Medical Physics Education

    NASA Astrophysics Data System (ADS)

    Bourland, Dan

    2011-10-01

    Medical physics, an applied field of physics, is the applications of physics in medicine. Medical physicists are essential professionals in contemporary healthcare, contributing primarily to the diagnosis and treatment of diseases through numerous inventions, advances, and improvements in medical imaging and cancer treatment. Clinical service, research, and teaching by medical physicists benefits thousands of patients and other individuals every day. This talk will cover three main topics. First, exciting current research and development areas in the medical physics sub-specialty of radiation oncology physics will be described, including advanced oncology imaging for treatment simulation, image-guided radiation therapy, and biologically-optimized radiation treatment. Challenges in patient safety in high-technology radiation treatments will be briefly reviewed. Second, the educational path to becoming a medical physicist will be reviewed, including undergraduate foundations, graduate training, residency, board certification, and career opportunities. Third, I will introduce the American Association of Physicists in Medicine (AAPM), which is the professional society that represents, advocates, and advances the field of medical physics (www.aapm.org).

  6. Physics Formulary

    NSDL National Science Digital Library

    Wevers, Johan

    Provided by physicist Johan Wevers and written at the undergraduate to postgraduate level, the Physics Formulary provides 108 pages of physics formulas. According to the authors, the Formulary â??is intended to be a short reference for anyone who works with physics and often needs to look up equations.â? The Formulary is available in a number of formats, including Adobe PDF, and presents formulas relating all major areas of physics including mechanics, electricity & magnetism, relativity, oscillations, waves, optics, statistical physics, thermodynamics, transport phenomena, quantum physics, plasma physics, solid state physics, theory of groups, nuclear physics, quantum field theory & particle physics, and astrophysics. This is a great resource for students and teachers of both introductory and advanced physics.

  7. Sl-IAA3, a tomato Aux/IAA at the crossroads of auxin and ethylene signalling involved in differential growth.

    PubMed

    Chaabouni, Salma; Jones, Brian; Delalande, Corinne; Wang, Hua; Li, Zhengguo; Mila, Isabelle; Frasse, Pierre; Latché, Alain; Pech, Jean-Claude; Bouzayen, Mondher

    2009-01-01

    Whereas the interplay of multiple hormones is essential for most plant developmental processes, the key integrating molecular players remain largely undiscovered or uncharacterized. It is shown here that a member of the tomato auxin/indole-3-acetic acid (Aux/IAA) gene family, Sl-IAA3, intersects the auxin and ethylene signal transduction pathways. Aux/IAA genes encode short-lived transcriptional regulators central to the control of auxin responses. Their functions have been defined primarily by dominant, gain-of-function mutant alleles in Arabidopsis. The Sl-IAA3 gene encodes a nuclear-targeted protein that can repress transcription from auxin-responsive promoters. Sl-IAA3 expression is auxin and ethylene dependent, is regulated on a tight tissue-specific basis, and is associated with tissues undergoing differential growth such as in epinastic petioles and apical hook. Antisense down-regulation of Sl-IAA3 results in auxin and ethylene-related phenotypes, including altered apical dominance, lower auxin sensitivity, exaggerated apical hook curvature in the dark and reduced petiole epinasty in the light. The results provide novel insights into the roles of Aux/IAAs and position the Sl-IAA3 protein at the crossroads of auxin and ethylene signalling in tomato. PMID:19213814

  8. The PB1 Domain in Auxin Response Factor and Aux/IAA Proteins: A Versatile Protein Interaction Module in the Auxin Response[OPEN

    PubMed Central

    2015-01-01

    An integral part of auxin-regulated gene expression involves the interplay of two types of transcription factors, the DNA binding auxin response factor (ARF) activators and the interacting auxin/indole acetic acid (Aux/IAA) repressors. Insight into the mechanism of how these transcription factors interact with one another has recently been revealed from crystallographic information on ARF5 and ARF7 C-terminal domains (i.e., a protein-protein interaction domain referred to as domain III/IV that is related to domain III/IV in Aux/IAA proteins). Three-dimensional structures showed that this domain in ARF5 and ARF7 conforms to a well-known PB1 (Phox and Bem1) domain that confers protein-protein interactions with other PB1 domain proteins through electrostatic contacts. Experiments verifying the importance of charged amino acids in conferring ARF and Aux/IAA interactions have confirmed the PB1 domain structure. Some in planta experiments designed to test the validity of PB1 interactions in the auxin response have led to updated models for auxin-regulated gene expression and raised many questions that will require further investigation. In addition to the PB1 domain, a second protein interaction module that functions in ARF-ARF dimerization and facilitates DNA binding has recently been revealed from crystallography studies on the ARF1 and ARF5 DNA binding domains. PMID:25604444

  9. Une alternative aux hypothèses de Boussinesq des gaz chauds : L'approximation polytropique

    NASA Astrophysics Data System (ADS)

    Rey, Claude; Benjeddou, Sa??d

    2004-02-01

    A new approximation is proposed for the balance equations of heated gas flows, taking into account completely the couplings between dynamic and thermal fields, as well as compressibility, stating in a polytropic formulation the relation between the quantities of corresponding state. The polytropic exponent is the new variable that characterises the transfers; it substitutes the temperature for the pressure and the density that are physical quantities difficult to grasp. The method opens interesting prospects for the study of heated gases, for experiments, or for modelling and numerical simulation. To cite this article: C. Rey, S. Benjeddou, C. R. Mecanique 332 (2004).

  10. Casimir effect in dielectrics: Surface area contribution

    E-print Network

    Carmen Molina-Paris; Matt Visser

    1997-07-08

    In this paper we take a deeper look at the technically elementary but physically robust viewpoint in which the Casimir energy in dielectric media is interpreted as the change in the total zero point energy of the electromagnetic vacuum summed over all states. Extending results presented in previous papers [hep-th/9609195; hep-th/9702007] we approximate the sum over states by an integral over the density of states including finite volume corrections. For an arbitrarily-shaped finite dielectric, the first finite-volume correction to the density of states is shown to be proportional to the surface area of the dielectric interface and is explicitly evaluated as a function of the permeability and permitivity. Since these calculations are founded in an elementary and straightforward way on the underlying physics of the Casimir effect they serve as an important consistency check on field-theoretic calculations. As a concrete example we discuss Schwinger's suggestion that the Casimir effect might be the underlying physical basis behind sonoluminescence}. The recent controversy concerning the relative importance of volume and surface contributions is discussed. For sufficiently large bubbles the volume effect is always dominant. Furthermore we can explicitly calculate the surface area contribution as a function of refractive index.

  11. EMSL Contribution Plan

    SciTech Connect

    Campbell, Allison A.

    2008-12-01

    This Contribution Plan is EMSL’s template for achieving our vision of simultaneous excellence in all aspects of our mission as a national scientific user facility. It reflects our understanding of the long-term stewardship we must work toward to meet the scientific challenges faced by the Department of Energy (DOE) and the nation. During the next decade, we will implement the strategies contained in this Plan, working closely with the scientific community, our advisory committees, DOE’s Office of Biological and Environmental Research, and other key stakeholders. This Plan is fully aligned with the strategic plans of DOE, its Office of Science, and the Pacific Northwest National Laboratory (PNNL). We recognize that shifts in science and technology, national priorities, and resources made available through the Federal budget process create planning uncertainties and, ultimately, a highly dynamic planning environment. Accordingly, this Plan should be viewed as a living document and we continually evaluate the changing needs and opportunities posed by our stakeholders (i.e., DOE, users, staff, advisory committees), work closely with them to understand and respond to those changes, and align our strategy accordingly. This Plan is organized around two sections. Section 1 describes our vision and four strategic outcomes: 1) Scientific Innovation, 2) Capabilities that Transform Science, 3) Outstanding Management and Operations, and Engaged and Proactive Users. These outcomes provide the framework for seven critical actions we must take during the next 3 to 5 years: 1) Establishing leadership in EMSL science themes, 2) building and deploying transformational capabilities, 3) integrating computation with experiment, 4) ensuring EMSL’s workforce meets the scientific challenges of the future, 5) creating partnerships, 6) attracting and engaging users in EMSL’s long-term strategy, and 7) building a research infrastructure that meets emerging scientific needs. Section 2 describes EMSL’s detailed business plan, including an analysis of opportunity, organizational investments, and actionable milestones.

  12. Sea salt CCN contribution

    NASA Astrophysics Data System (ADS)

    Hudson, J. G.; Jha, V.; Noble, S.

    2011-12-01

    Volatility measurements (Twomey 1971; Hudson and Da 1996) showed that most CCN over the ocean are not NaCl. However, other reports indicate NaCl as a major CCN component. Here we contrast cloud condensation nuclei (CCN) spectral volatility (thermal fractionation) measurements from three aircraft field projects to provide insight into the relative contribution of sea salt. The most remote location, PASE (mid-Pacific), had the highest average CCN concentrations (NCCN) probably because it was the least cloudy whereas the less remote, but more cloudy,RICO(Caribbean)had the lowest average NCCN (Hudson and Noble 2009). In RICO particle concentrations in all size ranges larger than 0.3 micrometers were well correlated with wind speed (R ~ 0.87) but uncorrelated with NCCN (Fig. 1A). Smaller particles in RICO were correlated with NCCN but uncorrelated with wind speed. In PASE only particles larger than 10 micrometers were correlated with wind speed and concentrations in these size ranges were uncorrelated with NCCN. Particles smaller than 10 micrometers in PASE were uncorrelated with wind speed but well correlated with NCCN. In both projects particle concentrations smaller than these respective sizes were highly correlated with NCCN, at all S in PASE but mainly with NCCN at high S in RICO. CCN volatility measurements showed high correlations between refractory NCCN and wind speed, especially for low supersaturation (S) NCCN, and no correlation of volatile NCCN at all S with wind speed. In PASE there was only a weak positive correlation between refractory NCCN and wind and also no correlation between volatile NCCN and wind. These results indicate that in clean maritime air the wind originated component of NCCN can be substantial (i.e., > 30% for wind > 14 m/s) but that in maritime air with higher NCCN the wind derived CCN component is probably less than 10%. The contrast in cloudiness between the two projects was responsible for many of the differences noted between them. A third project (POST) showed appropriately intermediate results to those of RICO and PASE. The results indicate that the effects of clouds on NCCN play a major role in the relative influence of sea salt on NCCN and ultimately on climate. Hudson, J.G. and S. Noble, 2009: Geophys. Res. Let., 36, L13812, Hudson, J.G. and X. Da, 1996: J. Geophys. Res., 101, 4435-4442. Twomey, S.: 1971: J. Atmos. Sci., 28, 377-381.

  13. Modélisation du cycle de vie d'un polluant en atmosphère : application aux oxydes d'azote (NO{X})

    NASA Astrophysics Data System (ADS)

    Hamzi, R.; Bourmada, N.; Benamrane, B. T.; Londiche, H.

    2005-05-01

    Les problèmes de l'environnement nécessitent des modélisations particulièrement difficiles, mais d'une grande importance sociale. C'est un domaine récent, où les données sont encore peu nombreuses, mais où les attentes sont considérables, tant auprès du public que des politiques et des industriels. En effet, la modélisation consiste à définir un modèle qui permettra de représenter efficacement le processus étudié. Dans cette optique le comportement modélisé n'est que la manifestation extérieure d'une structure plus profonde. La complexité du système et du problème posé détermine celle du modèle, qui va de la simple représentation qualitative d'un comportement aux formules mathématiques les plus élaborées. Lorsque la modélisation est exprimée mathématiquement, on recourt généralement à un programme de simulation pour calculer le comportement prévisionnel du modèle. La compréhension du cycle de vie d'un polluant en atmosphère, dans notre cas les oxydes d'azote (NOX), nécessite la modélisation de l'évolution des réactifs et des produits en fonction du temps exprimée par des équations différentielles. La réalisation de la simulation à partir de ces modèles, nous permet de connaître l'ensemble des processus ayant lieu lors de l'émission du polluant en atmosphère jusqu'à sa consommation.

  14. Constructing Cardiovascular Fitness Knowledge in Physical Education

    ERIC Educational Resources Information Center

    Zhang, Tan; Chen, Ang; Chen, Senlin; Hong, Deockki; Loflin, Jerry; Ennis, Catherine

    2014-01-01

    In physical education, it has become necessary for children to learn kinesiological knowledge for understanding the benefits of physical activity and developing a physically active lifestyle. This study was conducted to determine the extent to which cognitive assignments about healthful living and fitness contributed to knowledge growth on…

  15. How Do Education Students Learn Physics?

    ERIC Educational Resources Information Center

    Mistades, Voltaire Mallari

    2011-01-01

    Research in physics education has identified students' attitudes and beliefs that contribute to higher gains in learning. The study investigated the extent of change in education majors' attitudes, beliefs and cognitive expectations after going through an introductory physics course. Using the MPEX (Maryland Physics Expectations) Survey and the…

  16. Differences in Physical Activity during School Recess

    ERIC Educational Resources Information Center

    Ridgers, Nicola D.; Saint-Maurice, Pedro F.; Welk, Gregory J.; Siahpush, Mohammad; Huberty, Jennifer

    2011-01-01

    Background: School recess provides a daily opportunity for physical activity engagement. The purpose of this study was to examine physical activity levels during recess by gender, ethnicity, and grade, and establish the contribution of recess to daily school physical activity levels. Methods: Two hundred and ten children (45% boys) from grades 3…

  17. Lightning Physics and Effects

    NASA Astrophysics Data System (ADS)

    Orville, Richard E.

    2004-03-01

    Lightning Physics and Effects is not a lightning book; it is a lightning encyclopedia. Rarely in the history of science has one contribution covered a subject with such depth and thoroughness as to set the enduring standard for years, perhaps even decades, to come. This contribution covers all aspects of lightning, including lightning physics, lightning protection, and the interaction of lightning with a variety of objects and systems as well as the environment. The style of writing is well within the ability of the technical non-expert and anyone interested in lightning and its effects. Potential readers will include physicists; engineers working in the power industry, communications, computer, and aviation industries; atmospheric scientists; geophysicists; meteorologists; atmospheric chemists; foresters; ecologists; physicians working in the area of electrical trauma; and, lastly, architects. This comprehensive reference volume contains over 300 illustrations, 70 tables with quantitative information, and over 6000 reference and bibliography entries.

  18. Sports Physicals

    MedlinePLUS

    ... Digestive System How the Body Works Main Page Sports Physicals KidsHealth > Kids > Staying Healthy > Keeping Fit and ... baseball, football, or basketball. What Happens During a Sports Physical There are two main parts to a ...

  19. Sports Physicals

    MedlinePLUS

    ... important. What Is a Sports Physical? In the sports medicine field, the sports physical exam is known as ... of any potential conditions you may have. Most sports medicine doctors believe the medical history is the most ...

  20. Physical activity

    MedlinePLUS

    Physical activity -- which includes an active lifestyle and routine exercise -- plus eating well, is the best way to ... shortness of breath when you are active Build physical activity into your regular routine Simple lifestyle changes can ...

  1. Physics Notes

    ERIC Educational Resources Information Center

    School Science Review, 1972

    1972-01-01

    Seventeen experiments in physics are described to demonstrate various physical phenomena. These include the areas of velocity of sound, damped oscillations, plastic deformation of wires, materials, testing, air resistance, spectrum optical filtering, and some new improvised apparatus. (PS)

  2. Physical Therapy

    Microsoft Academic Search

    Victoria Marchese; Kripa Dholakia; Lori Brake

    \\u000a Physical therapists diagnose and manage conditions that cause movement dysfunction which affect an individual’s physical and\\u000a functional ability. They work toward restoring, maintaining, and promoting not only optimal physical function, but optimal\\u000a wellness, fitness, and quality of life as it relates to movement and health. Physical therapists provide interventions which\\u000a prevent the onset and progression of impairments, activity limitations, and

  3. Contributing factors of obesity among stressed adolescents

    PubMed Central

    Tajik, Esra; Zulkefli, Nor Afiah Mohd; Baharom, Anisah; Minhat, Halimatus Sakdiah; Latiff, Latiffah Abd

    2014-01-01

    Background: Many adolescents suffer from common mental disorders such as stress, which affects health through the psychosocial process, eating behavior, food choices and physical activity. During adolescence, dietary patterns are formed and can affect the occurrence of diseases in later life. This is a review of the results in the pertinent literature, from 1989 until November 2013, concerning stress and the contributing factors that lead to obesity among adolescents. The aim of this review is to identify obesity among stressed adolescents as well as the contributing factors. Methods: A descriptive design was used for both quantitative and qualitative studies while, in addition, psychological theories were used for the qualitative studies. The articles were screened to ensure their quality and included in this review accordingly. Ten articles were included in the review comprising cross-sectional, cohort, review and meta-analysis. Interviews and questionnaires were used for data collection. Results: The literature provided obvious information focusing on emotional stress and obesity for both boys and girls. This review revealed that stress results in overweight and obesity among adolescents through changes in lifestyle including decreased physical activity and increased food intake. Gender and economic status are the main components that affect obesity in stressed adolescents. Conclusion: Obesity is a consequence of stress among adolescents and is exacerbated by the wrong eating attitude. Developing proper food choices among adolescents can help prevent obesity and other complications in adulthood.

  4. Heavy-quark contribution to the proton's magnetic moment

    E-print Network

    Xiangdong Ji; D. Toublan

    2006-05-05

    We study the contribution to the proton's magnetic moment from a heavy quark sea in quantum chromodynamics. The heavy quark is integrated out perturbatively to obtain an effective dimension-6 magnetic moment operator composed of three gluon fields. The leading contribution to the matrix element in the proton comes from a quadratically divergent term associated with a light-quark tensor operator. With an approximate knowledge of the proton's tensor charge, we conclude that a heavy sea-quark contribution to the proton's magnetic moment is positive in the asymptotic limit. We comment on the implication of this result for the physical strange quark.

  5. Report Ocean WG Contributions from

    E-print Network

    Stoffelen, Ad

    Report Ocean WG Contributions from SMHI, MISU, KNMI Andreas Sterl #12;Contributions SMHI: Heat budget of Arctic Ocean Tuning MISU: Overturning and water masses KNMI: warm SST bias in Southern Ocean #12;SMHI #12;Ocean heat transport into the Arctic in CMIP5-simulations with EC-Earth solid: RCP4

  6. Physics Education Technology: Interactive Physics Simulations

    NSDL National Science Digital Library

    This collection of interactive, research-based simulations introduces students to basic physical phenomena. The simulations cover a variety of topics: motion, sound, and waves; light and radiation; electricity, magnets, and circuits; chemistry; and many others. The simulations can be run from the web site or downloaded for later use, and are accompanied by a collection of lessons and activities that use them. There is also information on how to download and run the simulations and links to publications about the project and studies of the effectiveness of the simulations in teaching. Educators are also invited to contribute ideas for lesson or activities that use the simulations.

  7. Physics 2000

    NSDL National Science Digital Library

    Provided by the Chemistry and Physics Departments at the University of Colorado at Boulder, Physics 2000 is a non-threatening introduction to physics. In Einstein's Legacy, cartoon characters guide visitors through visual and conceptual lessons on X-rays, Cat Scans, and Microwave Ovens. A third lesson, Lasers, is still under construction. The Atomic Lab explores two physics phenomena: the two slit experiment and Bose-Einstein condensation. Applets are used throughout the site to allow visitors to interact with animations to demonstrate physics principles. Users can, for example, stretch and shift two waves to learn about wave interference or adjust the frequency of laser beams to cool and trap atoms.

  8. U.S. Contributions to ITER

    SciTech Connect

    Ned R. Sauthoff

    2005-05-13

    The United States participates in the ITER project and program to enable the study of the science and technology of burning plasmas, a key programmatic element missing from the world fusion program. The 2003 U.S. decision to enter the ITER negotiations followed an extensive series of community and governmental reviews of the benefits, readiness, and approaches to the study of burning plasmas. This paper describes both the technical and the organizational preparations and plans for U.S. participation in the ITER construction activity: in-kind contributions, staff contributions, and cash contributions as well as supporting physics and technology research. Near-term technical activities focus on the completion of R&D and design and mitigation of risks in the areas of the central solenoid magnet, shield/blanket, diagnostics, ion cyclotron system, electron cyclotron system, pellet fueling system, vacuum system, tritium processing system, and conventional systems. Outside the project, the U .S. is engaged in preparations for the test blanket module program. Organizational activities focus on preparations of the project management arrangements to maximize the overall success of the ITER Project; elements include refinement of U.S. directions on the international arrangements, the establishment of the U.S. Domestic Agency, progress along the path of the U.S. Department of Energy's Project Management Order, and overall preparations for commencement of the fabrication of major items of equipment and for provision of staff and cash as specified in the upcoming ITER agreement.

  9. EDITORIAL: Physics competitions Physics competitions

    Microsoft Academic Search

    H. Jordens; L. Mathelitsch

    2009-01-01

    1. Physics competitions: aims and realizations One aim of physics competitions is to increase the interest of young students, primarily at upper secondary level, to physics and natural sciences in general. A competition has motivational aspects known usually from sports events or games---comparing one's own ability with others, of course with the desire to be better and to win. If

  10. Comprehensive Genome-Wide Analysis of the Aux/IAA Gene Family in Eucalyptus: Evidence for the Role of EgrIAA4 in Wood Formation.

    PubMed

    Yu, Hong; Soler, Marçal; San Clemente, Hélène; Mila, Isabelle; Paiva, Jorge A P; Myburg, Alexander A; Bouzayen, Mondher; Grima-Pettenati, Jacqueline; Cassan-Wang, Hua

    2015-04-01

    Auxin plays a pivotal role in various plant growth and development processes, including vascular differentiation. The modulation of auxin responsiveness through the auxin perception and signaling machinery is believed to be a major regulatory mechanism controlling cambium activity and wood formation. To gain more insights into the roles of key Aux/IAA gene regulators of the auxin response in these processes, we identified and characterized members of the Aux/IAA family in the genome of Eucalyptus grandis, a tree of worldwide economic importance. We found that the gene family in Eucalyptus is slightly smaller than that in Populus and Arabidopsis, but all phylogenetic groups are represented. High-throughput expression profiling of different organs and tissues highlighted several Aux/IAA genes expressed in vascular cambium and/or developing xylem, some showing differential expression in response to developmental (juvenile vs. mature) and/or to environmental (tension stress) cues. Based on the expression profiles, we selected a promising candidate gene, EgrIAA4, for functional characterization. We showed that EgrIAA4 protein is localized in the nucleus and functions as an auxin-responsive repressor. Overexpressing a stabilized version of EgrIAA4 in Arabidopsis dramatically impeded plant growth and fertility and induced auxin-insensitive phenotypes such as inhibition of primary root elongation, lateral root emergence and agravitropism. Interestingly, the lignified secondary walls of the interfascicular fibers appeared very late, whereas those of the xylary fibers were virtually undetectable, suggesting that EgrIAA4 may play crucial roles in fiber development and secondary cell wall deposition. PMID:25577568

  11. Imaginaire et développement des réseaux techniques. Les apports de l'histoire de l'électrification rurale en France et aux Etats-Unis

    Microsoft Academic Search

    Olivier Coutard

    Résumé L'historiographie accumulée depuis une quinzaine d'années sur le développement des réseaux techniques conduit à redonner une place véritable à l'imaginaire, au-delà de la phase d'appropriation initiale de ces techniques. C'est ce que l'on se propose d'illustrer dans cet article à partir de l'histoire de l'électrification rurale en France et aux Etats-Unis, qui atteste d'un volontarisme fort de l'Etat en

  12. Quantification of social contributions to earthquake mortality

    NASA Astrophysics Data System (ADS)

    Main, I. G.; NicBhloscaidh, M.; McCloskey, J.; Pelling, M.; Naylor, M.

    2013-12-01

    Death tolls in earthquakes, which continue to grow rapidly, are the result of complex interactions between physical effects, such as strong shaking, and the resilience of exposed populations and supporting critical infrastructures and institutions. While it is clear that the social context in which the earthquake occurs has a strong effect on the outcome, the influence of this context can only be exposed if we first decouple, as much as we can, the physical causes of mortality from our consideration. (Our modelling assumes that building resilience to shaking is a social factor governed by national wealth, legislation and enforcement and governance leading to reduced levels of corruption.) Here we attempt to remove these causes by statistically modelling published mortality, shaking intensity and population exposure data; unexplained variance from this physical model illuminates the contribution of socio-economic factors to increasing earthquake mortality. We find that this variance partitions countries in terms of basic socio-economic measures and allows the definition of a national vulnerability index identifying both anomalously resilient and anomalously vulnerable countries. In many cases resilience is well correlated with GDP; people in the richest countries are unsurprisingly safe from even the worst shaking. However some low-GDP countries rival even the richest in resilience, showing that relatively low cost interventions can have a positive impact on earthquake resilience and that social learning between these countries might facilitate resilience building in the absence of expensive engineering interventions.

  13. Hempel's dilemma and the physics of computation

    E-print Network

    Beenakker, C W J

    2007-01-01

    Carl Gustav Hempel (1905-1997) formulated the dilemma that carries his name in an attempt to determine the boundaries of physics. Where does physics go over into metaphysics? The purpose of this contribution is to indicate how a recently developed field of research, the physics of computation, might offer a new answer to that old question: The boundary between physics and metaphysics is the boundary between what can and what cannot be computed in the age of the universe.

  14. Is the metal contribution to the astrophysical opacity incorrect

    SciTech Connect

    Magee, N.H. Jr.; Merts, A.L.; Huebner, W.F.

    1984-08-01

    Numerical tests by Simon have indicated that an arbitrary increase in the metal (atomic number Z>2) contribution to the opacity by a factor of 2 to 3 leads to Cepheid models that, in some aspects, are in better agreement with observations than models using the standard opacity. We show that such a large increase in opacity is incompatible with atomic physics.

  15. Tesla's contribution to radiowave propagation

    Microsoft Academic Search

    Aleksandar Marincic; Djuradj Budimir

    2001-01-01

    We review Nikola Tesla's contribution to radiowave propagation and wireless power transmission. Tesla's patents, published and unpublished notes about radiowave propagation and wireless power transmission are less known, and if known to some extent, they are usually wrongly interpreted

  16. Physics 2000

    NSDL National Science Digital Library

    Physics 2000 relies heavily on the use of interactive applets. These are different from the typical animations you see on the Internet because you can actually interact with them. This is an older site from the Center for Integrated Plasma Studies at the University of Colorado, Boulder. It uses cartoon characters to explain physics concepts. A downloadable version of Physics 2000 is available by contacting the Center for Integrated Plasma Studies via postal mail.

  17. Neutrino physics

    SciTech Connect

    Harris, Deborah A.; /Fermilab

    2008-09-01

    The field of neutrino physics has expanded greatly in recent years with the discovery that neutrinos change flavor and therefore have mass. Although there are many neutrino physics results since the last DIS workshop, these proceedings concentrate on recent neutrino physics results that either add to or depend on the understanding of Deep Inelastic Scattering. They also describe the short and longer term future of neutrino DIS experiments.

  18. Mathematization in introductory physics

    NASA Astrophysics Data System (ADS)

    Brahmia, Suzanne M.

    Mathematization is central to STEM disciplines as a cornerstone of the quantitative reasoning that characterizes these fields. Introductory physics is required for most STEM majors in part so that students develop expert-like mathematization. This dissertation describes coordinated research and curriculum development for strengthening mathematization in introductory physics; it blends scholarship in physics and mathematics education in the form of three papers. The first paper explores mathematization in the context of physics, and makes an original contribution to the measurement of physics students' struggle to mathematize. Instructors naturally assume students have a conceptual mastery of algebra before embarking on a college physics course because these students are enrolled in math courses beyond algebra. This paper provides evidence that refutes the validity of this assumption and categorizes some of the barriers students commonly encounter with quantification and representing ideas symbolically. The second paper develops a model of instruction that can help students progress from their starting points to their instructor's desired endpoints. Instructors recognize that the introductory physics course introduces new ideas at an astonishing rate. More than most physicists realize, however, the way that mathematics is used in the course is foreign to a large portion of class. This paper puts forth an instructional model that can move all students toward better quantitative and physical reasoning, despite the substantial variability of those students' initial states. The third paper describes the design and testing of curricular materials that foster mathematical creativity to prepare students to better understand physics reasoning. Few students enter introductory physics with experience generating equations in response to specific challenges involving unfamiliar quantities and units, yet this generative use of mathematics is typical of the thinking involved in doing physics. It contrasts with their more common experience with mathematics as the practice of specified procedures to improve efficiency. This paper describes new curricular materials based on invention instruction provide students with opportunities to generate mathematical relationships in physics, and the paper presents preliminary evidence of the effectiveness of this method with mathematically underprepared engineering students.

  19. Climate Physics

    ERIC Educational Resources Information Center

    Space, William

    2007-01-01

    Numerous connections exist between climate science and topics normally covered in physics and physical science courses. For instance, lessons on heat and light can be used to introduce basic climate science, and the study of electric circuits provides a context for studying the relationship between electricity consumption and carbon pollution. To…

  20. Physics Notes.

    ERIC Educational Resources Information Center

    School Science Review, 1980

    1980-01-01

    Describes equipment, activities, and experiments useful in physics instruction, including among others, a list of articles relating to physics topics, computer interface that makes a computer cost effective, use of a guitar in vibrating string experiments, and photoelectric aids to the measurement of distance, speed, velocity, and acceleration.…

  1. Bs Physics

    E-print Network

    Thomas Kuhr; for the Belle collaboration; the CDF collabortion; the D0 collaboration

    2011-03-04

    While B0 and B+ mesons are well studied, mainly by the B factories, less is known about Bs mesons. Specifically large new physics effects may still be present in the Bs system. This unexplored region is studied by the CDF, D0, and Belle experiments. In this article their recent measurements on the Bs physics sector are presented.

  2. Physics Magic

    Microsoft Academic Search

    Nathaniel Lasry; Pierre-Osias Christin

    2006-01-01

    The purpose of this paper is to show the magic of physics by showing the physics of magic. What usually makes magic tricks interesting is that something unexpected occurs. Similarly, demonstrations are interesting inasmuch as they produce something unexpected. Since expectations are linked to preconceptions, a demonstration making use of a flaw in a preconception will result in something unexpected.

  3. Plasma Physics

    Microsoft Academic Search

    Kyoji Nishikawa; Masashiro Wakatani

    1990-01-01

    Beginning at an introductory level, this text presents a thorough treatment of plasma physics, including an extensive discussion of its applications in thermonuclear fusion research. A novel feature of this book is its comprehensive description of the various concepts and formulas widely used in fusion theory based on the fundamental equations of the plasma fluid. The physics of fusion plasmas

  4. Football Physics

    NSDL National Science Digital Library

    Gay, Timothy J. (Timothy James), 1953-

    Dr. Tim Gay at the University of Nebraska - Lincoln discusses the physical concepts related to football such as vectors, impulse, and atoms. The website provides seven current as well as archived QuickTime videos of entertaining lectures to help students understand physical concepts. The lessons covered are: Inertia; Vectors; Newton's Third Law; Impulse; Quickness, Speed, Power and Strength; and Quickness and Ankle Injuries.

  5. Contribution of gallium experiments to the understanding of solar physics and neutrino physics

    SciTech Connect

    Gavrin, V. N., E-mail: gavrin@inr.ru [Russian Academy of Sciences, Institute for Nuclear Research (Russian Federation)

    2013-10-15

    The results of gallium measurements of solar neutrino and measurements with artificial sources of neutrinos are presented. Conclusions are drawn from these results, and the potential of the SAGE experiment for studying transitions of active neutrinos to sterile states for {Delta}m{sup 2} > 0.5 eV{sup 2} and a sensitivity of a few percent to the disappearance of electron neutrinos is examined.

  6. Physics Quizzes and Physics Trivia

    NSDL National Science Digital Library

    On this site, visitors can access thirty-five quizzes, each with five to ten questions, covering various aspects of physics. The topics here include: special relativity, Ohmâ??s lore, orbital mechanics, inside the atom, types of energy storage, and subatomic and modern physics. For accessibility, each quiz can be played in either Flash or html format. Also, each questionâ??s answer contains a brief explanation why it is the correct answer to help visitors more thoroughly understand the physics principle being tested. This is a useful resource for students to refresh or enhance their knowledge of physics, or for educators to use in the classroom to test studentsâ?? understanding.

  7. Physics World

    NSDL National Science Digital Library

    2012-07-13

    Created by the Institute of Physics, Physics World brings together "news, views and information for the global physics community." First-time users may wish to wander through the site's blog, which contains compelling entries on how athletes could benefit from an understanding of the physics of their sports. The site is also a fast-moving place to get news from the field, via the Headlines area. Scholars and others should scroll down to the White Papers area, which features compelling new works from a range of institutes and professional organizations. The Multimedia section is quite a pip, as it contains reports on the hunt for the elusive Higgs boson and a report on how plasma applications are shaping the modern world. Finally, the In depth area collects reports from the world's leading physicists and professional science writers on topics from radioactive contamination to modeling the entire universe. Interested visitors can sign up for the Physics World RSS feeds on the site.

  8. On Dragon and Turkeys: Physics for Future Citizens

    ERIC Educational Resources Information Center

    Colletti, Leonardo

    2010-01-01

    Too often teachers describe physics solely as a technical discipline, which contributes concretely to changing our material world. In a society where prejudices and superstitions still play an important, sometimes tragic, role, there is much more to emphasise about physics. A physics teacher should introduce high school students to physics by…

  9. What can I do with a degree in Physical Education?

    E-print Network

    Hickman, Mark

    government, the health and fitness industry, and sport coaching. A Physical Education degree is usefulWhat can I do with a degree in Physical Education? Education Planning your career Choosing a career.canterbury.ac.nz/liaison/best_prep.shtml What is Physical Education? Physical education focuses on the study of movement and its contribution

  10. College of Natural Science and Mathematics Department of Physics

    E-print Network

    Hartman, Chris

    physics College of Natural Science and Mathematics Department of Physics 907-474-7339 www, and contributes greatly to other disciplines such as the biosciences and medicine. The undergraduate curriculum of physics, climate sciences and meteorology. The Computational Physics concentration is relevant

  11. Leonardo da Vinci's contributions to neuroscience.

    PubMed

    Pevsner, Jonathan

    2002-04-01

    Leonardo da Vinci (1452-1519) made far-reaching contributions to many areas of science, technology and art. Leonardo's pioneering research into the brain led him to discoveries in neuroanatomy (such as those of the frontal sinus and meningeal vessels) and neurophysiology (he was the first to pith a frog). His injection of hot wax into the brain of an ox provided a cast of the ventricles, and represents the first known use of a solidifying medium to define the shape and size of an internal body structure. Leonardo developed an original, mechanistic model of sensory physiology. He undertook his research with the broad goal of providing physical explanations of how the brain processes visual and other sensory input, and integrates that information via the soul. PMID:11998691

  12. Recent Langley helicopter acoustics contributions

    NASA Technical Reports Server (NTRS)

    Morgan, Homer G.; Pao, S. P.; Powell, C. A.

    1988-01-01

    The helicopter acoustics program at NASA Langley has included technology for elements of noise control ranging from sources of noise to receivers of noise. The scope of Langley contributions for about the last decade is discussed. Specifically, the resolution of two certification noise quantification issues by subjective acoustics research, the development status of the helicopter system noise prediction program ROTONET are reviewed and the highlights from research on blade rotational, broadband, and blade vortex interaction noise sources are presented. Finally, research contributions on helicopter cabin (or interior) noise control are presented. A bibliography of publications from the Langley helicopter acoustics program for the past 10 years is included.

  13. Résistance aux antituberculeux

    Microsoft Academic Search

    N. Veziris; E. Cambau; W. Sougakoff; J. Robert; V. Jarlier

    2005-01-01

    Mycobacteria responsible for tuberculosis (M. tuberculosis, M. bovis, M. africanum) are susceptible to a very small number of antibiotics. As soon as these drugs were used in humans all gave rise to the selection of resistant mycobacteria. Study of the mechanisms of acquired resistance, with the help of the genetics of mycobacteria, led to a more accurate understanding of the

  14. Physics Phridays

    NASA Astrophysics Data System (ADS)

    Falbo, Maria

    2007-12-01

    Teaching high school physics involves cheerleading, coaching, and acting (in addition to course preparation, equipment maintenance/construction, and grading). One is like a performer that has to be "on" all the time to keep the attention and interest of students in order to engage them in the content. But what happens once the course is over? We hope that we have sparked some interest in physics that will continue and that our students take what they've learned with them, but the reality is often disappointing. Can we do better than hope? "Physics Phridays" might be a starting point.

  15. Physical urticaria.

    PubMed

    Dice, John P

    2004-05-01

    Physical urticarias are a unique subgroup of chronic urticaria in which patients develop urticaria secondary to environmental stimuli. Common triggers include exercise, temperature changes, cold, heat, pressure, sunlight, vibration, and water. Systemic symptoms have occurred during severe episodes. Physical urticarias are responsible for approximately 20% to 30% of all cases of chronic urticaria. A basic knowledge of these unusual disorders is important for all healthcare providers. This article covers the following types of physical urticarias: dermatographism, cholinergic urticaria, local heat urticaria, exercise-induced anaphylaxis, vibratory angioedema, solar urticaria, and aquagenic urticaria. PMID:15120149

  16. Physics research needs for ITER

    SciTech Connect

    Sauthoff, N.R.

    1995-07-01

    Design of ITER entails the application of physics design tools that have been validated against the world-wide data base of fusion research. In many cases, these tools do not yet exist and must be developed as part of the ITER physics program. ITER`s considerable increases in power and size demand significant extrapolations from the current data base; in several cases, new physical effects are projected to dominate the behavior of the ITER plasma. This paper focuses on those design tools and data that have been identified by the ITER team and are not yet available; these needs serve as the basis for the ITER Physics Research Needs, which have been developed jointly by the ITER Physics Expert Groups and the ITER design team. Development of the tools and the supporting data base is an on-going activity that constitutes a significant opportunity for contributions to the ITER program by fusion research programs world-wide.

  17. Rock mechanics contributions from defense programs

    SciTech Connect

    Heuze, F.E.

    1992-02-01

    An attempt is made at illustrating the many contributions to rock mechanics from US defense programs, over the past 30-plus years. Large advances have been achieved in the technology-base area covering instrumentation, material properties, physical modeling, constitutive relations and numerical simulations. In the applications field, much progress has been made in understanding and being able to predict rock mass behavior related to underground explosions, cratering, projectile penetration, and defense nuclear waste storage. All these activities stand on their own merit as benefits to national security. But their impact is even broader, because they have found widespread applications in the non-defense sector; to name a few: the prediction of the response of underground structures to major earthquakes, the physics of the earth`s interior at great depths, instrumentation for monitoring mine blasting, thermo-mechanical instrumentation useful for civilian nuclear waste repositories, dynamic properties of earthquake faults, and transient large-strain numerical modeling of geological processes, such as diapirism. There is not pretense that this summary is exhaustive. It is meant to highlight success stories representative of DOE and DOD geotechnical activities, and to point to remaining challenges.

  18. IDS contribution to ITRF2008

    Microsoft Academic Search

    Jean-Jacques Valette; Frank G. Lemoine; Pascale Ferrage; Philippe Yaya; Zuheir Altamimi; Pascal Willis; Laurent Soudarin

    2010-01-01

    For the first time, the International DORIS Service (IDS) has produced a technique level combination based on the contributions of seven analysis centers (ACs), including the European Space Operations Center (ESOC), Geodetic Observatory Pecny (GOP), Geoscience Australia (GAU), the NASA Goddard Space Flight Center (GSFC), the Institut Géographique National (IGN), the Institute of Astronomy, Russian Academy of Sciences (INASAN, named

  19. Original Contribution Involvement of Na+

    E-print Network

    Brand, Paul H.

    Original Contribution Involvement of Na+ /K+ -ATPase in hydrogen peroxide-induced hypertrophy production of reactive oxygen species (ROS) was required for ouabain-induced hypertrophy in cultured cardiac alone is sufficient to induce hypertrophy. A moderate amount of H2O2 was continuously generated

  20. Environmental Contributions to Allergic Disease

    E-print Network

    Levetin, Estelle

    disease is more complex than increased exposure to pollution and allergens and that early childhood factors on the manifesta- tion of allergic disease. Exposure to indoor allergens and contaminants has been, we feel that the emphasis on indoor allergens has overshadowed the contribution of outdoor exposure

  1. Caroline Herschel's contributions to astronomy

    Microsoft Academic Search

    Marilyn Bailey Ogilvie

    1975-01-01

    The nature of the contributions to astronomy of Caroline Lucretia Herschel (1750–1848) are explored in this article. Her accomplishments included new observational discoveries and the skilled and accurate transcription and reduction of astronomical data. Although she made important additions to the sum total of astronomical facts available to the scientist, she herself showed little interest or ability in applying these

  2. SAN FRANCISCO ESTUARY INSTITUTE CONTRIBUTION

    E-print Network

    on the Margins of San Francisco Bay Final Report An RMP Technical Report by Craig Jones Sea Engineering, Inc Estuary Institute #12;This report should be cited as: Jones, C., Yee, D., Davis J. A., McKee, L. J on the Margins of San Francisco Bay. Draft Report. An RMP Technical Report. Contribution No. 663. San Francisco

  3. SEQUENCE ANALYSIS Contributions by Ulam

    E-print Network

    SEQUENCE ANALYSIS Contributions by Ulam to Molecular Genetics by Walter B. Goad L ord Rayleigh once as an avalanche of detail, still growing, gathered about the way sequences of nu- cleotide bases in DNA encode of thinking precisely about relationships among sequences, in par- ticular, how to devise quantitative mea

  4. Supporting Enterprise. A College Contribution.

    ERIC Educational Resources Information Center

    Bolton, John F.; Cook, David

    This report describes the experience of one college--Percival Whitley College in Calderdale, England--in contributing to the strategy for economic regeneration of the surrounding metropolitan district. It charts the success of the borough and the college working together to attract national and European funding. A checklist for implementing…

  5. Physical Abuse

    MedlinePLUS

    ... Physical indicators Sprains, dislocations, fractures, or broken bones Burns from cigarettes, appliances, or hot water Abrasions on ... suspicious hospitalizations Victims are brought to different medical facilities for treatment to prevent medical practitioners from observing ...

  6. Physics Notes

    ERIC Educational Resources Information Center

    School Science Review, 1972

    1972-01-01

    Twelve ideas are presented for physics teachers to implement in the laboratory or classroom. Topics covered include electromagnetic induction, microbalance, capacitors, determination of light velocity, and the compound pendulum. Information regarding laboratory equipment is also provided. (PS)

  7. Magic Physics?

    ERIC Educational Resources Information Center

    Featonby, David

    2010-01-01

    This article examines several readily available "magic tricks" which base their "trickery" on physics principles, and questions the use of the word "magic" in the 21st century, both in popular children's science and in everyday language. (Contains 18 figures.)

  8. Atomic Physics

    NSDL National Science Digital Library

    Christopher Griffith

    This collection provides a basic introduction to Atomic Physics. It reviews the building blocks of atomic structure, explores atomic isotopes, explains Einstein's famous equation E = mc2, and introduces the various types of radiation.

  9. Contest Physics.

    ERIC Educational Resources Information Center

    Moehnke, Randy

    1994-01-01

    Discusses the use of contests to keep physics interesting and exciting for the students. Includes: balloon car, egg drop, tennis ball catapult, bridge building, mousetrap vehicle, musical instrument, slide photo, electric junk dissection, windmill generator, and solar heater. (MVL)

  10. Physics Magic

    E-print Network

    Lasry, N; Lasry, Nathaniel; Christin, Pierre-Osias

    2006-01-01

    The purpose of this paper is to show the magic of physics by showing the physics of magic. What usually makes magic tricks interesting is that something unexpected occurs. Similarly, demonstrations are interesting inasmuch as they produce something unexpected. Since expectations are linked to preconceptions, a demonstration making use of a flaw in a preconception will result in something unexpected. Given the numerous misconceptions in physics, many demonstrations can be dressed up as magic tricks. The first objective of this paper is to share with other physics teachers the excitement of creating and using magical classroom demonstrations. The second objective is to provide interested instructors with practical means to convert a classical demonstration into a magic trick. To illustrate the procedure, two classical demonstrations will be re-presented as the magic tricks we have presented in our courses. The final goal is to use current ideas in educational psychology to explain why using magic has worked so ...

  11. Combustion Physics.

    ERIC Educational Resources Information Center

    Jones, A. R.

    1985-01-01

    Discusses how physics is used to improve the efficiency of combustion, pointing out that the interdisciplinary topic has applications to problems of real industrial relevance and practical value. (JN)

  12. Physical urticarias.

    PubMed

    Mahmood, T

    1994-05-01

    Chronic urticaria can be produced by a number of stimuli that cause mast cell mediator release. Patients with urticaria caused by physical agents account for roughly one-fifth of all cases of chronic urticaria. There are about 20 different types of physical urticaria. Two forms, dermographism and cholinergic urticaria, are quite common and represent more than two-thirds of all cases of physically caused urticaria. More than one agent may precipitate urticaria in a given individual. Urticarial response can be easily reproduced in the sensitive patient and, generally, lasts less than one hour. Systemic features such as flushing, dizziness, headaches, and even hypotension, may occur during severe episodes. Identification of the causative physical agent is necessary for effective therapy. PMID:8172038

  13. Physics Notes

    ERIC Educational Resources Information Center

    School Science Review, 1973

    1973-01-01

    Ideas are proposed for physics teachers to use in their classrooms. Subjects include: alpha particles, spectrometer experiments, refractive index of glass, measurement of surface tension, projectile motion, and radiant heat. (PS)

  14. Contrairement aux apparences, le piano est un systme acoustique et mcanique sophistiqu dont la facture demeure ce jour trs largement empirique. Les connaissances, trs prcises, des concepteurs et fabricants

    E-print Network

    Boyer, Edmond

    Contrairement aux apparences, le piano est un système acoustique et mécanique sophistiqué dont la fabricants de pianos sont issues de siècles d'expérimentations, d'échecs, de succès... Et intriguent beaucoup fonctionnement d'un piano et de ses différents éléments, il est possible de confirmer ou non ces connaissances et

  15. Robert Hooke's Seminal Contribution to Orbital Dynamics

    NASA Astrophysics Data System (ADS)

    Nauenberg, Michael

    2005-03-01

    During the second half of the seventeenth century, the outstanding problem in astronomy was to understand the physical basis for Kepler’s laws describing the observed orbital motion of a planet around the Sun. In the middle 1660s,Robert Hooke (1635 1703) proposed that a planet’s motion is determined by compounding its tangential velocity with the change in radial velocity impressed by the gravitational attraction of the Sun, and he described his physical concept to Isaac Newton (1642 1726) in correspondence in 1679. Newton denied having heard of Hooke’s novel concept of orbital motion, but shortly after their correspondence he implemented it by a geometric construction from which he deduced the physical origin of Kepler’s area law,which later became Proposition I, Book I, of his Principia in 1687.Three years earlier, Newton had deposited a preliminary draft of it, his De Motu Corporum in Gyrum (On the Motion of Bodies), at the Royal Society of London, which Hooke apparently was able to examine a few months later, because shortly there-after he applied Newton’s construction in a novel way to obtain the path of a body under the action of an attractive central force that varies linearly with the distance from its center of motion (Hooke’s law). I show that Hooke’s construction corresponds to Newton’s for his proof of Kepler’s area law in his De Motu. Hooke’s understanding of planetary motion was based on his observations with mechanical analogs. I repeated two of his experiments and demonstrated the accuracy of his observations.My results thus cast new light on the significance of Hooke’s contributions to the development of orbital dynamics, which in the past have either been neglected or misunderstood.

  16. Processed foods: contributions to nutrition.

    PubMed

    Weaver, Connie M; Dwyer, Johanna; Fulgoni, Victor L; King, Janet C; Leveille, Gilbert A; MacDonald, Ruth S; Ordovas, Jose; Schnakenberg, David

    2014-06-01

    Both fresh and processed foods make up vital parts of the food supply. Processed food contributes to both food security (ensuring that sufficient food is available) and nutrition security (ensuring that food quality meets human nutrient needs). This ASN scientific statement focuses on one aspect of processed foods: their nutritional impacts. Specifically, this scientific statement 1) provides an introduction to how processed foods contribute to the health of populations, 2) analyzes the contribution of processed foods to "nutrients to encourage" and "constituents to limit" in the American diet as recommended by the Dietary Guidelines for Americans, 3) identifies the responsibilities of various stakeholders in improving the American diet, and 4) reviews emerging technologies and the research needed for a better understanding of the role of processed foods in a healthy diet. Analyses of the NHANES 2003-2008 show that processed foods provide both nutrients to encourage and constituents to limit as specified in the 2010 Dietary Guidelines for Americans. Of the nutrients to encourage, processed foods contributed 55% of dietary fiber, 48% of calcium, 43% of potassium, 34% of vitamin D, 64% of iron, 65% of folate, and 46% of vitamin B-12. Of the constituents to limit, processed foods contributed 57% of energy, 52% of saturated fat, 75% of added sugars, and 57% of sodium. Diets are more likely to meet food guidance recommendations if nutrient-dense foods, either processed or not, are selected. Nutrition and food science professionals, the food industry, and other stakeholders can help to improve the diets of Americans by providing a nutritious food supply that is safe, enjoyable, affordable, and sustainable by communicating effectively and accurately with each other and by working together to improve the overall knowledge of consumers. PMID:24760975

  17. Understanding Physics

    Microsoft Academic Search

    Robin Jakeways

    1998-01-01

    There are many books on the market now that cover the material in a typical first-year University Physics course. They mostly originate in the USA where introductory College Physics is clearly big business, and in general they are of an excellent standard. A number of departments, including my own, use one of these as an all-embracing first-year text. Not the

  18. TOTEM Physics

    E-print Network

    K. Eggert; V. Avati; M. Deile; for the TOTEM Collaboration

    2006-02-10

    This article discusses the physics programme of the TOTEM experiment at the LHC. A new special beam optics with beta* = 90 m, enabling the measurements of the total cross-section, elastic pp scattering and diffractive phenomena already at early LHC runs, is explained. For this and the various other TOTEM running scenarios, the acceptances of the leading proton detectors and of the forward tracking stations for some physics processes are described.

  19. FSU High Energy Physics

    SciTech Connect

    Prosper, Harrison B. [Florida State University; Adams, Todd [Florida State University; Askew, Andrew [Florida State University; Berg, Bernd [Florida State University; Blessing, Susan K. [Florida State University; Okui, Takemichi [Florida State University; Owens, Joseph F. [Florida State University; Reina, Laura [Florida State University; Wahl, Horst D. [Florida State University

    2014-12-01

    The High Energy Physics group at Florida State University (FSU), which was established in 1958, is engaged in the study of the fundamental constituents of matter and the laws by which they interact. The group comprises theoretical and experimental physicists, who sometimes collaborate on projects of mutual interest. The report highlights the main recent achievements of the group. Significant, recent, achievements of the group’s theoretical physicists include progress in making precise predictions in the theory of the Higgs boson and its associated processes, and in the theoretical understanding of mathematical quantities called parton distribution functions that are related to the structure of composite particles such as the proton. These functions are needed to compare data from particle collisions, such as the proton-proton collisions at the CERN Large Hadron Collider (LHC), with theoretical predictions. The report also describes the progress in providing analogous functions for heavy nuclei, which find application in neutrino physics. The report highlights progress in understanding quantum field theory on a lattice of points in space and time (an area of study called lattice field theory), the progress in constructing several theories of potential new physics that can be tested at the LHC, and interesting new ideas in the theory of the inflationary expansion of the very early universe. The focus of the experimental physicists is the Compact Muon Solenoid (CMS) experiment at CERN. The report, however, also includes results from the D0 experiment at Fermilab to which the group made numerous contributions over a period of many years. The experimental group is particularly interested in looking for new physics at the LHC that may provide the necessary insight to extend the standard model (SM) of particle physics. Indeed, the search for new physics is the primary task of contemporary particle physics, one motivated by the need to explain certain facts, such as the non-zero neutrino masses or the overwhelming astrophysical evidence for an invisible form of matter, called dark matter, that has had a marked effect on the evolution of structure in the universe. The report highlights the main, recent, experimental achievements of the experimental group, which include the investigation of properties of the W and Z bosons; the search for new heavy stable charged particles and the search for a proposed property of nature called supersymmetry in proton-proton collisions that yield high energy photons. In addition, we report a few results from a more general search for supersymmetry at the LHC, initiated by the group. The report also highlights the group's significant contributions, both theoretical and experimental, to the 2012 discovery of the Higgs boson and the measurement of its properties.

  20. Perturbative nuclear physics

    SciTech Connect

    Beane, Silas R. [Department of Physics, University of New Hampshire, Durham, New Hampshire 03824-3568 (United States); Kaplan, David B. [Institute for Nuclear Theory, University of Washington, Seattle, Washington 98195-1550 (United States); Instituto de Fisica Teorica, IFT-UAM/CSIC, Cantoblanco 28049 (Spain); Vuorinen, Aleksi [CERN, Physics Department, TH Unit, CH-1211 Geneva 23 (Switzerland); Institut fur Theoretische Physik, TU Wien, Wiedner Hauptstr. 8-10, A-1040 Vienna (Austria)

    2009-07-15

    We present a new formulation of effective field theory for nucleon-nucleon (NN) interactions that treats pion interactions perturbatively, and we offer evidence that the expansion converges satisfactorily to third order in the expansion, which we have computed analytically for s- and d-wave NN scattering. Starting with the Kaplan-Savage-Wise (KSW) expansion about the nontrivial fixed point corresponding to infinite NN scattering length, we cure the convergence problems with that theory by modifying the short distance pion interaction, essentially resumming those contributions in the contact interactions. This method appears to make possible a host of high precision analytic few-body calculations in nuclear physics.

  1. Contributing factors to depressed mood in Multiple Sclerosis William D. Vossa

    E-print Network

    Dennis, Nancy

    Contributing factors to depressed mood in Multiple Sclerosis William D. Vossa , Peter A. Arnettb, CA: Academic Press.] to Multiple Sclerosis (MS), it was hypothesized that physical disability Ltd. Keywords: Neuropsychology; Multiple sclerosis; Depression Multiple Sclerosis (MS) has been

  2. Quantum Physics

    NASA Astrophysics Data System (ADS)

    Le Bellac, Michel

    2006-03-01

    Quantum physics allows us to understand the nature of the physical phenomena which govern the behavior of solids, semi-conductors, lasers, atoms, nuclei, subnuclear particles and light. In Quantum Physics, Le Bellac provides a thoroughly modern approach to this fundamental theory. Throughout the book, Le Bellac teaches the fundamentals of quantum physics using an original approach which relies primarily on an algebraic treatment and on the systematic use of symmetry principles. In addition to the standard topics such as one-dimensional potentials, angular momentum and scattering theory, the reader is introduced to more recent developments at an early stage. These include a detailed account of entangled states and their applications, the optical Bloch equations, the theory of laser cooling and of magneto-optical traps, vacuum Rabi oscillations, and an introduction to open quantum systems. This is a textbook for a modern course on quantum physics, written for advanced undergraduate and graduate students. Completely original and contemporary approach, using algebra and symmetry principles Introduces recent developments at an early stage, including many topics that cannot be found in standard textbooks. Contains 130 physically relevant exercises

  3. Aspects of Hadron Physics

    E-print Network

    C. D. Roberts; M. S. Bhagwat; S. V. Wright; A. Holl

    2008-02-01

    Detailed investigations of the structure of hadrons are essential for understanding how matter is constructed from the quarks and gluons of Quantum chromodynamics (QCD), and amongst the questions posed to modern hadron physics, three stand out. What is the rigorous, quantitative mechanism responsible for confinement? What is the connection between confinement and dynamical chiral symmetry breaking? And are these phenomena together sufficient to explain the origin of more than 98% of the mass of the observable universe? Such questions may only be answered using the full machinery of nonperturbative relativistic quantum field theory. This contribution provides a perspective on progress toward answering these key questions. In so doing it will provide an overview of the contemporary application of Dyson-Schwinger equations in Hadron Physics. The presentation assumes that the reader is familiar with the concepts and notation of relativistic quantum mechanics, with the functional integral formulation of quantum field theory and with regularisation and renormalisation in its perturbative formulation.

  4. Physics Based on Physical Monism

    E-print Network

    Seong-Dong Kim

    2006-03-22

    Based on a physical monism, which holds that the matter and space are classified by not a difference of their kind but a difference of magnitude of their density, I derive the most fundamental equation of motion, which is capable of providing a deeper physical understanding than the known physics. For example, this equation answers to the substantive reason of movement, and Newton's second law, which has been regarded as the definition of force, is derived in a substantive level from this equation. Further, the relativistic energy-mass formula is generalized to include the potential energy term, and the Lorentz force and Maxwell equations are newly derived.

  5. Eight Hundred Years of Physics Teaching.

    ERIC Educational Resources Information Center

    Bishop, George

    This book uses a biographical pattern to trace the history of physics teaching. Whenever possible the story of an influential person or institution is used to tell the story of that period. The book begins with the contributions of the Greeks, the Romans, and the Arabs to physics and its teaching. Chapters include: (1) "The First Beginnings of…

  6. Mobile system to motivate teenagers' physical activity

    Microsoft Academic Search

    Sonia M. Arteaga; Mo Kudeki; Adrienne Woodworth; Sri Kurniawan

    2010-01-01

    This paper reports a mobile persuasive application to motivate teenagers to start and continue being physically active. Being physically active can lead to reduced risks of having weight and cardiovascular problems; however efforts in this direction had variable success. Designing technology that will be engaging and motivating for teenagers requires an understanding of the factors that contribute to behavior adoption

  7. The Other Hall Effect: College Board Physics

    ERIC Educational Resources Information Center

    Sheppard, Keith; Gunning, Amanda M.

    2013-01-01

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

  8. Integrating Physical Activity into Academic Pursuits

    ERIC Educational Resources Information Center

    Gaus, Mark D.; Simpson, Cynthia G.

    2009-01-01

    Children of today may be the first generation in the United States in more than 200 years to have a life expectancy shorter than their parents. Low levels of fitness caused by physical inactivity and poor nutritional habits of many of today's youth may be a contributing factor. Combating low fitness levels with physical activity is of utmost…

  9. Physical Education Curriculum Reform in Finland

    ERIC Educational Resources Information Center

    Yli-Piipari, Sami

    2014-01-01

    The Finnish education system has received worldwide attention due to the top academic performance of Finnish school students. Physical education, as an integral part of the Finnish education curriculum, potentially contributes to the overall success. The purpose of this article is to summarize Finnish physical education reform during the past…

  10. Effective Field Theory in Nuclear Physics

    E-print Network

    Martin J. Savage; Barry R. Holstein

    2000-12-15

    The Electromagnetic and Hadronic Physics sub-community of nuclear physics held a town hall meeting at Jefferson Lab during November 30 to December 4 of 2000. This is is our combined contribution to the white paper that will result from this meeting.

  11. The Evolution of the Physical Activity Field

    ERIC Educational Resources Information Center

    Blair, Steven N.; Powell, Kenneth E.

    2014-01-01

    This article includes an historical review of research on physical activity and health, and how the findings have contributed to physical activity participation and promotion today. In the 20th century, research began to accumulate on the effects of exercise on physiological functions, and later on the relation between regular activity and various…

  12. Department of Physics 117 Clark Hall

    E-print Network

    Cohen, Itai

    've worked with physics professor Itai Cohen in soft condensed matter, with astronomy professor James Lloyd schools in the world, and made lasting and important contributions. Physics Department of Credits: Front their teaching skills through our Undergraduate Teaching Assistant (UTA) program. We host colloquia, technical

  13. Women in Physics in Fermi's Time

    Microsoft Academic Search

    Nina Byers

    2003-01-01

    Enrico Fermi lived from 1901 to 1954, a period of great progress in physics and a period in which opportunities for women to study and work in institutions of higher learning increased significantly in Europe and North America. Though there are a few examples of women who made important contributions to physics in the 18th century such as Emilie du

  14. Parton distributions incorporating QED contributions

    Microsoft Academic Search

    A. D. Martin; R. G. Roberts; W. J. Stirling; R. S. Thorne

    2005-01-01

    We perform a global parton analysis of deep inelastic and related hard-scattering data, including ${{\\\\mathcal{O}}}(\\\\alpha_{\\\\rm QED})$ corrections to the parton evolution. Although the quality of the fit is essentially unchanged, there are two important physical consequences. First, the different DGLAP evolution of u and d type quarks introduces isospin violation, i.e. $u^p \\\

  15. Experiments in Physics Physics 1291

    E-print Network

    Columbia University

    and Conservation of Energy 97 1-9 Standing Waves 105 1-10 Specific Heat and Mechanical Equivalent of Heat 115 #12 wave and particle properties (physical optics), will be treated in lecture during the second semester

  16. 5 CFR 1620.13 - Retroactive contributions.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ...2010-01-01 2010-01-01 false Retroactive contributions. 1620.13 Section...Personnel Act Employees § 1620.13 Retroactive contributions. (a) An employing authority can make retroactive employer contributions on...

  17. 22 CFR 130.6 - Political contribution.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...2010-04-01 2010-04-01 false Political contribution. 130.6 Section 130...INTERNATIONAL TRAFFIC IN ARMS REGULATIONS POLITICAL CONTRIBUTIONS, FEES AND COMMISSIONS § 130.6 Political contribution. Political...

  18. Physics Songs and Physics Poems

    NSDL National Science Digital Library

    Smith, Walter F.

    Hosted by Haverford College and maintained by Associate Professor of Physics Walter F. Smith, the PhysicsSongs.org Web site is just that. Students and educators will find songs that have been written about such things as Gauss's Law, The Twelve Days of Newton, The Relativity Song, and more. Words are provided, and some even contain playable recordings. Who said learning isn't fun?

  19. Sport, Physical Activity and Well-Being: An Objectivist Account

    ERIC Educational Resources Information Center

    Bloodworth, Andrew; McNamee, Mike; Bailey, Richard

    2012-01-01

    It is widely maintained that sport and physical activities contribute to the development of young people's well-being. Others argue that sports' contribution to good living is so strong that it is even thought to be a human right. Typically, however, the value of physical activity and sport to our well-being is conceptualized and researched within…

  20. Genetic contributions and their optimization.

    PubMed

    Woolliams, J A; Berg, P; Dagnachew, B S; Meuwissen, T H E

    2015-04-01

    Genetic contributions were first formalized in 1958 by James and McBride (Journal of Genetics, 56, 55-62) and have since been shown to provide a unifying framework for theories of gain and inbreeding. As such they have underpinned the development of methods that provide the most effective combination of maximizing gain whilst managing inbreeding and loss of genetic variation. It is shown how this optimum contribution technology can be developed from theory and adapted to provide practical selection protocols for a wide variety of situations including overlapping generations and multistage selection. The natural development of the theory to incorporate genomic selection and genomic control of inbreeding is also shown. PMID:25823835

  1. [Physical urticarias].

    PubMed

    Barbaud, A

    2003-05-01

    Ten percent of chronic urticarias are physical urticarias. Patients suffering from physical urticaria all have a suggestive history with specific eliciting stimuli (cold, heat, water, sun.) and wheals in the areas where the stimulus acts. The involved pathomechanisms are not well known. An unknown allergen (related to a cold or a heat injury, a polar molecule contained in the stratum corneum and soluble into water, a photoallergen) could induce a mast cell mediator release, followed by an infiltration by eosinophil then neutrophils polymorphonuclears. T-cells are not highly involved. Dermographism, the most frequent can be cured by anti-H1. In diagnosing cholinergic urticaria physical exercise has to be done by the patient (jogging, running, riding), anti-H1 are efficient. In other physical urticarias (delayed-pressure, cold, solar, heat, vibratory urticarias) as to be managed as follows: (1) to perform specific tests with respectively (weights; ice cube; UVA, UVB and visible light exposure; hot water contained in a tube; a vortex mixer); (2) to avoid eliciting stimuli; (3) to treat the associated diseases e.g. in secondary cold urticaria; (4) to try to induce a physical tolerance, a review is enclosed concerning cold, solar, heat and aquagenic urticarias; (5) to associate or not non sedative 2(nd) generation antihistamines. All the other alternative treatments are discussed but none of them has been evaluated. PMID:12843805

  2. Soil physics: a Moroccan perspective

    NASA Astrophysics Data System (ADS)

    Lahlou, Sabah; Mrabet, Rachid; Ouadia, Mohamed

    2004-06-01

    Research on environmental pollution and degradation of soil and water resources is now of highest priority worldwide. To address these problems, soil physics should be conceived as a central core to this research. This paper objectives are to: (1) address the role and importance of soil physics, (2) demonstrate progress in this discipline, and (3) present various uses of soil physics in research, environment and industry. The study of dynamic processes at and within the soil vadose zone (flow, dispersion, transport, sedimentation, etc.), and ephemeral phenomena (deformation, compaction, etc.), form an area of particular interest in soil physics. Soil physics has changed considerably over time. These changes are due to needed precision in data collection for accurate interpretation of space and time variation of soil properties. Soil physics interacts with other disciplines and sciences such as hydro(geo)logy, agronomy, environment, micro-meteorology, pedology, mathematics, physics, water sciences, etc. These interactions prompted the emergence of advanced theories and comprehensive mechanisms of most natural processes, development of new mathematical tools (modeling and computer simulation, fractals, geostatistics, transformations), creation of high precision instrumentation (computer assisted, less time constraint, increased number of measured parameters) and the scale sharpening of physical measurements which ranges from micro to watershed. The environment industry has contributed to an enlargement of many facets of soil physics. In other words, research demand in soil physics has increased considerably to satisfy specific and environmental problems (contamination of water resources, global warming, etc.). Soil physics research is still at an embryonic stage in Morocco. Consequently, soil physicists can take advantage of developments occurring overseas, and need to build up a database of soil static and dynamic properties and to revise developed models to meet our conditions. Large, but special, investment is required to promote research programs in soil physics, which consider developments in this discipline and respect Moroccan needs. These programs will be highlighted herein.

  3. Distinguishing possible mechanisms for auxin-mediated developmental control in Arabidopsis: models with two Aux/IAA and ARF proteins, and two target gene-sets.

    PubMed

    Bridge, L J; Mirams, G R; Kieffer, M L; King, J R; Kepinski, S

    2012-01-01

    New models of gene transcriptional responses to auxin signalling in Arabidopsis are presented. This work extends a previous model of auxin signalling to include networks of gene-sets which may control developmental responses along auxin gradients. Key elements of this new study include models of signalling pathways and networks involving two Aux-IAA proteins (IAAs), auxin response factors (ARFs) and gene targets. Hypotheses for the gene network topologies which may be involved in developmental responses have been tested against experimental observations for root hair growth in particular. In studying these models, we provide a framework for the analysis of auxin signalling with multiple IAAs and ARFs, and discuss the implications of bistability in such systems. PMID:22067512

  4. Ordered BaAl4- Type Variants in the BaAuxSn4-x System: A Unified View on Their Phase Stabilities versus Valence Electron Counts

    SciTech Connect

    Lin, Qisheng [Ames Laboratory; Miller, Gordon J. [Ames Laboratory; Corbett, John D. [Ames Laboratory

    2014-05-28

    Three ordered structures of the tetragonal BaAl4 type were identified in the Ba–Au–Sn system, from which a unified view of the interplay between the valence electron counts (VECs) and phase stabilities of these three types of derivatives can be developed. The BaNiSn3 (I4mm), ThCr2Si2 (I4/mmm), and CaBe2Ge2 (P4/nmm) type BaAuxSn4–x phases occurred respectively at x = 0.78(1)–1, 1.38(1)–1.47(1), and 1.52(1)–2.17(1), consistent with theoretical atomic “coloring” analyses that reveal an optimal VEC of 14 for the ThCr2Si2 type but larger and smaller values respectively for the BaNiSn3- and CaBe2Ge2-type structures.

  5. Activities Contributing to Total Energy Expenditure in the United States: Results from the NHAPS Study

    Microsoft Academic Search

    Linda Dong; Gladys Block; Shelly Mandel

    2004-01-01

    BACKGROUND: Physical activity is increasingly recognized as an important factor influencing health and disease status. Total energy expenditure, both low-intensity and high-intensity, contributes to maintenance of healthy body weight. This paper presents the results of a quantitative approach to determining the activities that contribute to total energy expenditure in the United States. METHODS: Data from the National Human Activity Pattern

  6. How Can Sport Biomechanics Contribute to the Advance of World Record and Best Athletic Performance?

    ERIC Educational Resources Information Center

    Li, Li

    2012-01-01

    Modern history has evidence that sport biomechanics provide valuable contribution in the pursuit of "faster, higher, and stronger." In this article, the contribution of sport biomechanics to the Olympic Games has been divided into three different categories: improve the physical capacity of the athletes, develop innovative techniques in a given…

  7. How Can Sport Biomechanics Contribute to the Advance of World Record and Best Athletic Performance?

    Microsoft Academic Search

    Li Li

    2012-01-01

    Modern history has evidence that sport biomechanics provide valuable contribution in the pursuit of “faster, higher, and stronger.” In this article, the contribution of sport biomechanics to the Olympic Games has been divided into three different categories: improve the physical capacity of the athletes, develop innovative techniques in a given sport, and help athletes interact with the environment more effectively.

  8. Genome-Wide Identification and Expression Profiling Analysis of the Aux/IAA Gene Family in Medicago truncatula during the Early Phase of Sinorhizobium meliloti Infection

    PubMed Central

    Zhang, Lei; Sun, Tao; Xu, Luqin; Tie, Shuanggui; Wang, Huizhong

    2014-01-01

    Background Auxin/indoleacetic acid (Aux/IAA) genes, coding a family of short-lived nuclear proteins, play key roles in wide variety of plant developmental processes, including root system regulation and responses to environmental stimulus. However, how they function in auxin signaling pathway and symbiosis with rhizobial in Medicago truncatula are largely unknown. The present study aims at gaining deeper insight on distinctive expression and function features of Aux/IAA family genes in Medicago truncatula during nodule formation. Principal Findings Using the latest updated draft of the full Medicago truncatula genome, a comprehensive identification and analysis of IAA genes were performed. The data indicated that MtIAA family genes are distributed in all the M. truncatula chromosomes except chromosome 6. Most of MtIAA genes are responsive to exogenous auxin and express in tissues-specific manner. To understand the biological functions of MtIAA genes involved in nodule formation, quantitative real-time polymerase chain reaction (qRT-PCR) was used to test the expression profiling of MtIAA genes during the early phase of Sinorhizobium meliloti (S. meliloti) infection. The expression patterns of most MtIAA genes were down-regulated in roots and up-regulated in shoots by S. meliloti infection. The differences in expression responses between roots and shoots caused by S. meliloti infection were alleviated by 1-NOA application. Conclusion The genome-wide identification, evolution and expression pattern analysis of MtIAA genes were performed in this study. The data helps us to understand the roles of MtIAA-mediated auxin signaling in nodule formation during the early phase of S. meliloti infection. PMID:25226164

  9. Elevated Seismic Activity Beneath the Slumbering Morne aux Diables Volcano, Northern Dominica and the Monitoring Role of the Seismic Research Centre

    NASA Astrophysics Data System (ADS)

    Watts, R. B.; Robertson, R. E.; Abraham, W.; Cole, P.; de Roche, T.; Edwards, S.; Higgins, M.; Johnson, M.; Joseph, E. P.; Latchman, J.; Lynch, L.; Nath, N.; Ramsingh, C.; Stewart, R. C.

    2012-12-01

    Since June 2009, periods of elevated seismic activity have been experienced around the flanks of Morne Aux Diables Volcano in northern Dominica. This long-dormant volcano is a complex of 7 andesitic lava domes with a central depression where a cold soufrière is evident. Prior to this activity, seismicity was very quiet except for a short period in 2000 and an intense short-lived swarm in April 2003. The most recent earthquake activity has been regularly felt by residents in villages on all flanks of the complex. In Dec 09/Jan10, scientists from the Seismic Research Centre (SRC), based in Trinidad & Tobago, in collaboration with staff of the Office of Disaster Management (ODM) and Dominica Public Seismic Network (DPSN) improved the monitoring capacity around this volcano from 1 to 7 seismic stations. Earthquakes are determined to be volcano-tectonic in nature and located at shallow depths (<4 km) beneath the central depression. Additionally, in Jan/Feb 10 geothermal sampling was undertaken and 2 permanent GPS sites were deployed. Public information leaflets prepared by SRC scientists using a "Question & Answer" format have been distributed to concerned citizens whilst many public meetings were carried out by ODM staff. Field investigations indicate that the previous Late Pleistocene activity of Morne Aux Diables switched from Pelèan dome growth and gravitational collapse to more explosive pumice-falls and associated ignimbrites, both styles forming extensive pyroclastic fans around the central complex. The town of Portsmouth is located on one of these fans ~5 km southwest of the central depression. Sporadic, short bursts of seismic activity continue at the time of writing.

  10. The Influence of Accelerator Science on Physics Research

    NASA Astrophysics Data System (ADS)

    Haussecker, Enzo F.; Chao, Alexander W.

    2011-06-01

    We evaluate accelerator science in the context of its contributions to the physics community. We address the problem of quantifying these contributions and present a scheme for a numerical evaluation of them. We show by using a statistical sample of important developments in modern physics that accelerator science has influenced 28% of post-1938 physicists and also 28% of post-1938 physics research. We also examine how the influence of accelerator science has evolved over time, and show that on average it has contributed to a physics Nobel Prize-winning research every 2.9 years.

  11. Physics of iron

    SciTech Connect

    Anderson, O.

    1993-10-01

    This volume comprises papers presented at the AIRAPT Conference, June 28 to July 1993. The iron sessions at the meeting were identified as the Second Ironworkers Convention. The renewal of interest stems from advances in technologies in both diamond-anvil cell (DAC) and shock wave studies as well as from controversies arising from a lack of consensus among both experimentalists and theoreticians. These advances have produced new data on iron in the pressure-temperature regime of interest for phase diagrams and for temperatures of the core/mantle and inner-core/outer-core boundaries. Particularly interesting is the iron phase diagram inferred from DAC studies. A new phase, {beta}, with a {gamma}-{beta}-{epsilon} triple point at about 30 GPa and 1190 K, and possible sixth phase, {omega}, with an {epsilon}-{Theta}-melt triple point at about 190 GPa and 4000 K are deemed possible. The importance of the equation of state of iron in consideration of Earth`s heat budget and the origin of its magnetic field invoke the interest of theoreticians who argue on the basis of molecular dynamics and other first principles methods. While the major thrust of both meetings was on the physics of pure iron, there was notable contributions on iron alloys. Hydrogen-iron alloys, iron-sulfur liquids, and the comparability to rhenium in phase diagram studies are discussed. The knowledge of the physical properties of iron were increased by several contributions.

  12. DOCTORAL PROGRAMME MATHEMATICS AND PHYSICS, Subprogramme PHYSICS,

    E-print Network

    Â?umer, Slobodan

    program Master degrees from the fields of mathematics, physics, mechanical engineering, electricalDOCTORAL PROGRAMME MATHEMATICS AND PHYSICS, Subprogramme PHYSICS, Module NUCLEAR ENGINEERING Engineering module treats nuclear technology, operation, nuclear safety, reactor physics, environmental issues

  13. Bonne gouvernance versus dmocratie: les rhtoriques de la banque mondiale et des ONG du Nord face aux

    E-print Network

    Paris-Sud XI, Université de

    Bonne gouvernance versus démocratie: les rhétoriques de la banque mondiale et des ONG du Nord face professionnels des ONG du Nord, les chercheurs en Sciences sociales se sont penchés avec beaucoup d'attention sur la question de la contribution des ONG locales à la gouvernance dans leur pays. Si deux rhétoriques

  14. Parton distributions incorporating QED contributions

    Microsoft Academic Search

    A. D. Martin; R. G. Roberts; W. J. Stirling; R. S. Thorne

    2005-01-01

    We perform a global parton analysis of deep inelastic and related hard-scattering data, including {{mathcal{O}}}(alpha_QED) corrections to the parton evolution. Although the quality of the fit is essentially unchanged, there are two important physical consequences. First, the different DGLAP evolution of u and d type quarks introduces isospin violation, i.e. u^p neq d^n, which is found to be unambiguously in

  15. Johannes Kepler and his contribution to Applied Mathematics

    NASA Astrophysics Data System (ADS)

    Pichler, Franz

    The worldwide renown of Johannes Kepler is based above all on his contribution to astronomy. The 3 Kepler's Laws relating to the planets are well known and will ensure that his name is remembered by future generations. Besides his astronomical work, Kepler also made important contributions in the fields of theology, physics, phylosophy and mathematics. The actual paper discusses the advances by Kepler in the application of mathematics to the solution of "real life problems". The author made a concise account of some of the disciples by Kepler: Klug, Wieleitner, Caspar, Hammer, paying particular attention to works published by Kepler while he was living in Linz (1612-1628). The Kepler's contribution to applied mathematics is an example supremely worthy of emulation, the author concludes.

  16. Physical Security

    SciTech Connect

    None

    2008-01-01

    The future of physical security at government facilities and national laboratories is rapidly progressing beyond the cliché of gates, guns and guards, and is quickly being replaced by radars, sensors and cameras. Learn more about INL's security research at http://www.facebook.com/idahonationallaboratory.

  17. Physics Demonstrations

    NSDL National Science Digital Library

    A collection of in-depth physics demonstrations with instructions for doing it yourself, videos that let you see how it's done, and suggestions for developing some of the demos into experiments. The demonstrations were developed and tested by The Science House, the mathematics and science learning outreach project of North Carolina State University.

  18. Soil Physics

    Microsoft Academic Search

    T. J. Marshall; J. W. Holmes; C. W. Rose

    1996-01-01

    Now in its third edition, this textbook gives a comprehensive account of soil physics with emphasis on field applications for students and research workers engaged in water resources studies, soil sciences, and plant sciences. The authors have added chapters on soil erosion, conservation, and the role of soil in affecting water quality to this new edition. The book gives an

  19. Soil physics

    Microsoft Academic Search

    W. A. Jury; W. H. Gardner

    1991-01-01

    In response to shifting research interests, this 5th edition book has been prepared to present contemporary information on traditional as well as current soil physics topics. Soil solid phase and soil dynamics have been reduced from 5 chapters in the previous edition to a single chapter here. Wind and water erosion have been eliminated. Information concerning transport of heat, water

  20. DOING Physics.

    ERIC Educational Resources Information Center

    Zwicker, Earl, Ed.

    1983-01-01

    Several good features of a projectile motion experiment (students fire their own rockets) are described, including accuracy achieved, low cost and relative safety. Also described is a simple novelty toy (originally distributed by McDonalds foods) illustrating physics concepts. Blowing on this toy pipe propels a thread around in a loop. (JN)

  1. Physics Notes.

    ERIC Educational Resources Information Center

    School Science Review, 1982

    1982-01-01

    Demonstrations, procedures, games, teaching suggestions and information on a variety of physics topics are presented, including hydraulic rams, units and formulae, static electric motors, a computer graphics program, diffraction, adaptation of a basic meter, photoelasticity, photo-diodes, radioactive decay, and analog-digital conversions. (DC)

  2. Physics Notes.

    ERIC Educational Resources Information Center

    School Science Review, 1981

    1981-01-01

    Laboratory procedures, equipment, teaching ideas, and resource materials related to physics are discussed. Topics include the construction of a liquid-metal pump, a hydraulic jack, and an apparatus which helps teach time/velocity graphs; current/voltage characteristics of a tungsten filament lamp; and an electric circuit game. (DC)

  3. Unifying Physics

    NASA Astrophysics Data System (ADS)

    Goradia, Shantilal

    2013-04-01

    Century old GR fails to unify quantum physics, nuclear force or distinguish between the mass of living bodies from inert mass. Probabilistic gravity [1] explains strong coupling (nuclear force). The natural log of the age of the universe, 10E60 in Planck times, equaling 137 (1/Alpha) extends physics to deeper science, if we stand on the shoulders of giants like Feynman and Gamow. Implications of [1] are that it is not the earth, but M and S numbers of the particles of the earth are remotely interacting with corresponding numbers of the particles of the moon and the sun respectively, neglecting other heavenly bodies in this short draft. This new physics is likely to enable creative scientific minds to throw light on a theoretical basis for an otherwise arbitrary cosmological constant, uniformity of microwave background, further vindication of Boltzmann, quantum informatics, Einstein’s later publicized views and more, eliminating the need to spend money for implicitly nonexistent quantum gravity and graviton.[4pt] [1] Journal of Physical Science and Applications 2 (7) (2012) 265-268.

  4. Quantum Physics

    Microsoft Academic Search

    E. Celeghini; M. A. del Olmo

    1969-01-01

    In Quantum Mechanics operators must be hermitian and, in a direct product space, symmetric. These properties are saved by Lie algebra operators but not by those of quantum algebras. A possible correspondence between observables and quantum algebra operators is suggested by extending the definition of matrix el- ements of a physical observable, including the eventual projection on the appro- priate

  5. Physics Notes.

    ERIC Educational Resources Information Center

    School Science Review, 1983

    1983-01-01

    Presented are physics experiments, laboratory procedures, demonstrations, and classroom materials/activities. Experiments include: speed of sound in carbon dioxide; inverse square law; superluminal velocities; and others. Equipment includes: current switch; electronic switch; and pinhole camera. Discussion of mechanics of walking is also included.…

  6. Physics Notes.

    ERIC Educational Resources Information Center

    School Science Review, 1978

    1978-01-01

    Discusses some high school physics demonstrations and experiments on a variety of topics: such as uses of the dipole, the vapour-liquid critical point, velocity of sound in metallic rods, the flux-density near a bar magnet, and a different style logic gate using basic units. (GA)

  7. Physics Portfolios

    ERIC Educational Resources Information Center

    Whitworth, Brooke A.; Bell, Randy L.

    2013-01-01

    Traditionally, teachers assess students' physics understanding through lab activities, responses to open-ended word problems, and tests. But there is another way to measure student understanding, one in which students apply their learning to the world around them. This article shows how to implement student portfolios, which allow students to…

  8. Physics & reality

    Microsoft Academic Search

    Albert Einstein

    2003-01-01

    Editor's Note: There is probably no modern scientist as famous as Albert Einstein. Born in Germany in 1879 and educated in physics and mathematics at the Swiss Federal Polytechnic School in Zurich, he was at first unable to find a teaching post, working instead as a technical assistant in the Swiss Patent Office from 1901 until 1908. Early in 1905,

  9. Woman in Physics in Slovenia

    NASA Astrophysics Data System (ADS)

    Zeleznik, Nadja; Conradi, Marjetka; Remskar, Maja

    2009-04-01

    Slovenian female physicists are organized in an informal network that incorporates more than 100 women working in research, academia, government, and industry. In the past three years we have accomplished several actions in order to motivate young girls and students to pursue physics. Our main achievement was publishing the monograph Physics—My Education in September 2007. The book includes 79 autobiographic contributions of female physicists presenting their life and work in different areas: science (institutes and universities), teaching, industry, and government. We have also organized an exhibition about Slovene women in physics, presenting the very first female physicists and all the next generations. A very popular item among women and men was also a T-shirt with our logo. By selling the books and T-shirts we have collected money for scholarships for female students of physics. The first four scholarships were awarded on March 8, 2008, in the spirit of the International Women's Day.

  10. Undergraduate physics research at ILP

    NASA Astrophysics Data System (ADS)

    Grobe, Rainer

    2007-10-01

    I will describe how undergraduate physics students can become involved in research work in theoretical atomic and laser physics. This is an ideal research area in which even high school students or students in their Freshman year can actively contribute by performing a wide variety of computer simulations. I will also describe how the curriculum of physics department has evolved in the last thirty years to make student research work one of its center missions. Illinois State University has a Bachelor's degree sequence in computational physics that was created to foster student-faculty collaborative research projects. Originally intended as a recruitment tool, it turned into a retention tool for our majors. I will give a few examples of research projects that involve undergraduate students in an essential way. These range from classical mechanical simulations to accompany of our studies of how matter in form of electron-positron pairs can be created from vacuum to bio-optical imaging schemes.

  11. Physics Demonstrations: Fowler's Physics Applets

    NSDL National Science Digital Library

    Michael Fowler, Commonwealth Professor of Physics at the University of Virginia, offers this prime collection of (some still in progress) physics demonstrations. Applets (Java) demonstrate such classic principles as Newton's Cannon (in which the user may fire red cannonballs at different velocities from a tall mountain -- and see which of them will orbit the earth), Group Velocity and Phase Velocity, Two-dimensional Collisions, Projectile Motion, Brownian Motion, and One-dimensional One-atom classical Gas, among others. Inquisitive users may download the applet as a .zip file, as source code, or with related class materials. A series of related applets are listed, as are links to resources such as TIPTOP, The Internet Pilot to Physics (described in the April 19, 1996 Scout Report).

  12. Corporate PAC Campaign Contributions in Perspective

    Microsoft Academic Search

    Jeffrey Milyo; David Primo; Timothy Groseclose

    2000-01-01

    There is a vast empirical literature on the allocation of corporate PAC contributions in Congressional elections and the influence that these contributions have on the policy-making process. The attention given to PAC contributions is far in excess of their actual importance. Corporate PAC contributions account for about 10% of Congressional campaign spending and major corporations allocate far more money to

  13. Sensitivity to new physics: a e versus a ?

    NASA Astrophysics Data System (ADS)

    Chizhov, M. V.

    2009-09-01

    At present it is generally believed that “new physics” effects contribute to leptonic anomalous magnetic moment, a l , via quantum loops only and they are proportional to the squared lepton mass, m {/l 2}. An alternative mechanism for a contribution by new physics is proposed. It occurs at the tree level and exhibits a linear rather than quadratic dependence on m l . This leads to a much larger sensitivity of a e to the new physics than was expected so far.

  14. Physics Back in TIME

    NASA Astrophysics Data System (ADS)

    Korsunsky, Boris

    2014-03-01

    Recently, I came into possession of an unusual item: a collection of 1928 TIME magazines. I began flipping through the pages out of sheer curiosity—and was soon astonished by the scale and the depth of their physics coverage. Back then, TIME had a special "Science" section in almost every issue and devoted quite a bit of space to the events that would hardly be mentioned in any popular magazine these days. Some of them were fleeting and merely curious, some truly timeless. Many of the articles and notes were devoted to physics: the people, the discoveries, the inventions, the conventions. I found the reading both entertaining and enlightening and would like to offer a sampler here. I hope that these little tidbits of history will lighten up the classroom discussions and help inspire your students by reminding them that physics is a dynamic, ever-changing field to which they may well contribute one day. I have found that my own students love it when a little bit of history is brought up; it always generates interesting questions and seems to spark the students' interest in the topic.

  15. Women in Physics.

    ERIC Educational Resources Information Center

    Roth, Laura M.; O'Fallon, Nancy M.

    This booklet presents information about career opportunities for women in physics. Included are summaries of research areas in physics (optical physics, solid-state physics, materials science, nuclear physics, high-energy physics, astrophysics, cryogenics, plasma physics, biophysics, atmospheric physics) and differences between theory and…

  16. DEPARTMENT OF PHYSICS Physics 21900

    E-print Network

    Lombardi, John R.

    the principles of vibrations & waves 10. to understand the principles of thermal physics as applied to expansion & optics as applied to reflection & refraction and total internal reflection Topics Covered: 1. Units, Pressure, Pascal principle Archimedes Principle, Bernoulli Equation 11. Vibration & Waves Natural

  17. Experiments in Physics Physics 1291

    E-print Network

    Columbia University

    -8 Projectile Motion and Conservation of Energy 97 1-9 Standing Waves 105 1-10 Specific Heat and Mechanical Equivalent of Heat 115 #12;#12;Introduction 1-0 General Instructions 1 Purpose of the Laboratory nature of light, with its dual wave and particle properties (physical optics), will be treated in lecture

  18. DEPARTMENT OF PHYSICS Physics 20300

    E-print Network

    Lombardi, John R.

    physics. Included are mechanics, Newton's laws of motion, and heat. Emphasis is on the basic principles in one and two dimensional motion 2. understand and use the concepts of forces and Newton's Laws in Two Dimensions 4. Forces and Newton's Laws of Motion 5. Dynamics of Uniform Circular Motion 6. Work

  19. Contribution from pressure-sensitive adhesives

    NASA Astrophysics Data System (ADS)

    Cunningham, Gilbert

    1996-03-01

    The successful use of many security papers, foils and films depends on the technology of chemical fastening systems -- especially pressure sensitive adhesives. These are adhesives activated not by heat or by the evaporation of water or some other solvent, but simply by the act of application -- by pressure. These adhesives provide the means whereby laminations, substrates and seals are made effective. In addition to their physical properties these adhesives are often required to possess optical properties to allow the security materials to be visibly active and indeed the adhesive system may itself contribute as a carrier for a variety of security materials. Recent advances in adhesives chemistry have made it possible to achieve virtually all the required physical performance characteristics combined with a choice of optical properties ranging from total opacity to invisibility and including controlled translucency and tinting. The implications for security printing and packaging are important. Opacity is easy to achieve, for example by loading the adhesive with aluminum powder, by the selection of totally opaque materials like metallized film or by various printing processes. But achieving transparency is a different matter, and transparency is mandatory for applications involving the protection of documents, photographs, etc. with a clear film over-laminate. Obvious examples would be for passports, visas and other personal identification. But some security devices may themselves require protection; for example holograms or embossings. And transparency in the test laboratory is not enough. The Australian driving licence is stuck to the windshield, so the transparency of the adhesive must be sustained over long periods without deterioration due to prolonged u/v exposure, climatic conditions or aging. The commercial label market has helped to push the technology forward. There is a strong demand for the 'no-label look' for packaging of clear plastic and glass containers where the content can be easily seen without interference and where wording or symbols can be read through the container. You see this increasingly with pharmaceuticals, cosmetics and toiletries, even bottled beer. Achieving transparency is one thing but this property must be combined with all the physical properties required of the pressure sensitive adhesive. First there is the question of permanence, re-positionability and removability and the degree to which these features are required. Secondly many complications arise from the range of materials to which the adhesive must be anchored and the range to which it will be applied and must bond. Obviously these surfaces vary from those with the highest surface energy (polycarbonate for example) to those apolar surfaces engineered for minimum attraction (PTFE -- 'Teflon' for example).

  20. EDITORIAL: Physics competitions Physics competitions

    NASA Astrophysics Data System (ADS)

    Jordens, H.; Mathelitsch, L.

    2011-07-01

    International tests on competences, such as TIMSS or PISA, and knowledge of young students have revealed low average scores in many countries, often unexpectedly. One effective measure to increase the average standard of a population is to bring the last third of the group to a higher level. Therefore, many nations put some effort into this activity. This brings the danger that not enough attention is paid to students at the other end, those who are talented. Indeed, it is a very difficult task for a teacher to support the less able and at the same time challenge the gifted students, to lead them to the limits of their abilities and provide for a smooth transition to university study. Physics competitions have been proven to fulfil these last demands to a large degree, and therefore are an important additional and, to some extent, complementary tool for the promotion of talented students. This third special section on physics competitions in European Journal of Physics contains three papers, each dealing with a different form of science contest. The first continues the series of presentations of tasks performed at the International Young Physicists' Tournament, which was held in Vienna in 2011. First place went to the team from Singapore, and they have put their investigation on vertical oscillations of coupled magnets into written form (not required by the tournament, where an oral presentation and a defence and discussion are the central aspects). Their paper shows how rich in physics this problem is, and what level of solutions high-school students can already achieve. Sadly, those responsible for the organization of last year's International Physics Olympiad did not provide us with a report on this competition. This is unfortunate, since the Olympiad in Zagreb was very successful and, in particular, the experimental tasks were creative and demanding. Very similar to the aims and the execution of the Physics Olympiad is the International Olympiad on Astronomy and Astrophysics. Those in charge of the competition give an overview of this relatively young tournament. They give a few examples of theoretical and experimental tasks, and one can see the strong connection between astronomy and physics, between the large scales in the universe and the small scales in particle physics. The third paper introduces a special competition called 'First Step to Nobel Prize in Physics'. It was conceived as a national event in Poland and has gained international reputation and acceptance since 1992. Papers are submitted from young students prior to university and are refereed in the same manner as real research papers. This means that the most important criterion is the originality and novelty of the activity performed in theoretical or experimental physics. The aims of this competition are set out below and can be seen as a credo for all competitions: promotion of scientific interest among young pupils selection and promotion of outstanding pupils enhancing motivation stimulation of school work establishing friendly relations between young physicists.

  1. Nuclear Physics of Neutron Stars

    E-print Network

    J. Piekarewicz

    2009-01-28

    Understanding the equation of state (EOS) of cold nuclear matter, namely, the relation between the pressure and energy density, is a central goal of nuclear physics that cuts across a variety of disciplines. Indeed, the limits of nuclear existence, the collision of heavy ions, the structure of neutron stars, and the dynamics of core-collapse supernova, all depend critically on the equation of state of hadronic matter. In this contribution I will concentrate on the special role that nuclear physics plays in constraining the EOS of cold baryonic matter and its impact on the properties of neutron stars.

  2. Conceptual Physics

    NSDL National Science Digital Library

    Hewitt, Paul G.

    2003-01-01

    From Prentice Hall and Pearson Education comes the online Conceptual Physics Tutorial. The site provides information for students on mechanics, properties of matter, heat, sound and light, electricity and magnetism, and atomic and nuclear physics. Each chapter contains subheadings and various described links to sites that focus on that particular subject. Under momentum, for example, more than a dozen sites are included under subheadings such as impulse changes, bouncing, conservation of momentum, collisions, and momentum vectors. Other highlights of the site include links to simulations found on the Web and questions of the week, along with their answer. Even though some of the provided links were dead, the repository of information should prove useful to visitors.

  3. Positron Physics

    NASA Technical Reports Server (NTRS)

    Drachman, Richard J.

    2003-01-01

    I will give a review of the history of low-energy positron physics, experimental and theoretical, concentrating on the type of work pioneered by John Humberston and the positronics group at University College. This subject became a legitimate subfield of atomic physics under the enthusiastic direction of the late Sir Harrie Massey, and it attracted a diverse following throughout the world. At first purely theoretical, the subject has now expanded to include high brightness beams of low-energy positrons, positronium beams, and, lately, experiments involving anti-hydrogen atoms. The theory requires a certain type of persistence in its practitioners, as well as an eagerness to try new mathematical and numerical techniques. I will conclude with a short summary of some of the most interesting recent advances.

  4. Physical Impairment

    NASA Astrophysics Data System (ADS)

    Trewin, Shari

    Many health conditions can lead to physical impairments that impact computer and Web access. Musculoskeletal conditions such as arthritis and cumulative trauma disorders can make movement stiff and painful. Movement disorders such as tremor, Parkinsonism and dystonia affect the ability to control movement, or to prevent unwanted movements. Often, the same underlying health condition also has sensory or cognitive effects. People with dexterity impairments may use a standard keyboard and mouse, or any of a wide range of alternative input mechanisms. Examples are given of the diverse ways that specific dexterity impairments and input mechanisms affect the fundamental actions of Web browsing. As the Web becomes increasingly sophisticated, and physically demanding, new access features at the Web browser and page level will be necessary.

  5. IDS contribution to ITRF2008

    NASA Astrophysics Data System (ADS)

    Valette, J.; Lemoine, F.; Ferrage, P.; Altamimi, Z.; Willis, P.; Stepanek, P.; Otten, M.; Govind, R.; Kuzin, S.; Le Bail, K.; Moore, P.; Yaya, P.; Soudarin, L.

    2009-12-01

    The International DORIS Service (IDS), in operation since 2003, submitted three sets of solutions to ITRF2005 from the IGN/JPL, LEGOS/CLS, and INASAN analysis centers, but no DORIS technique combination. Since that time new analysis centers have become operational including the Geodetic Observatory Pecny (GOP), the European Space Operations Center (ESOC), Geoscience Australia (GAU), the NASA Goddard Space Flight Center (GSC), and the University of Newcastle (NCL). These analysis centers run different software, including Gypsy (IGN & INASAN), GINS (LCA), Bernese (GOP), NAPEOS (ESOC), GEODYN (Geoscience Australia and NASA GSFC) and FAUST (NCL). In order to contribute to ITRF2008, seven analysis centers processed DORIS data from TOPEX/Poseidon, SPOT2, SPOT3, SPOT4, SPOT5, and ENVISAT from 1992 to 2008, producing weekly SINEX solutions or normal equations. The weekly SINEX files from seven AC’s were processed with the CATREF software. Three iterations of an IDS weekly combined time series were completed. The IDS-1, and IDS-2 combinations were preliminary station-only solutions. In the final combination, IDS-3, both stations and the Earth Orientation Paramters (EOP’s) were adjusted. Between each of the IDS combinations, the combination strategy (station filtering, outliers, weighting, scale or geocenter contributions) was improved and the AC’s SINEX series were refined. Some series were extended in data span while others were recomputed to correct anomalies or to improve the quality of the submissions, based on feedback from the combination analyses and intercenter comparisons. For example in IDS-1, both the GAU and GSC solutions were affected by a 20 mm scale offset that was removed in IDS-2 and IDS-3 after the application of improved troposphere modelling in the GEODYN software. The analysis for IDS-1 showed a higher station position WRMS in the vicinity of the high solar flux periods (late 2001-2002). Consequently for IDS-2, several AC’s (LCA, GAU, GSC) recomputed their orbits to estimate drag coefficients more frequently to mitigate this effect. The analysis of the frequency and amplitude of geocenter and scale signals was used to define the AC contributions to geocenter and scale in the final combination IDS-3. The comparisons of IDS-3 w.r.t. ITRF2008 are presented. Future prospects and plans for the IDS DORIS analyses are discussed.

  6. b Physics

    SciTech Connect

    Perret, Pascal [Laboratoire de Physique Corpusculaire, Universite Blaise Pascal, IN2P3-CNRS F-63177 Aubiere cedex (France)

    1998-10-19

    A summary of the most recent and important measurements in b physics is presented. The production of beauty particles in Z decays, b quark couplings, lifetimes, B{sup 0}-B{sup 0} oscillations, semileptonic b decays and studies of the number of charm quarks produced in b decays are reviewed. Extraction of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements |V{sub td}|, |V{sub cb}|, |V{sub ub}| and implication for |V{sub ts}| are discussed.

  7. Physical Activity

    Microsoft Academic Search

    Frank W. Booth; P. Darrell Neufer

    The successful coordination of hundreds of biological processes that allow the unanesthetized human to undergo maximal aerobic\\u000a work is one of the elegant marvels in modern biology. It is difficult to identify other examples of normal function that are\\u000a more complex in integrative or systems biology. Aerobic physical activity has long been recognized as producing a high metabolic\\u000a state that

  8. Forward Physics

    NASA Astrophysics Data System (ADS)

    Avati, V.

    2008-03-01

    Forward Physics measurements at the LHC start will be done by TOTEM, LHCf, and by the forward calorimeters of ATLAS (ZDC) and CMS (CASTOR, ZDC) at moderate luminosities. These detectors will measure the forward particle production and energy flow also relevant for cosmic ray experiments, and low-x QCD processes. Dedicated beam optics allows TOTEM to measure the total pp cross section, elastic scattering as well as diffraction.

  9. Quantum Physics

    NASA Astrophysics Data System (ADS)

    Rae, Alastair

    2012-03-01

    Preface to the second edition; Preface to the first edition; 1. Quantum physics; 2. Which way are the photons pointing?; 3. What can be hidden in a pair of photons?; 4. Wonderful Copenhagen?; 5. Is it all in the mind?; 6. Many worlds; 7. Is it a matter of size?; 8. Backwards and forwards; 9. Only one way forward?; 10. Can we be consistent?; 11. Illusion or reality?; Further reading.

  10. Michael Faraday and his contribution to anesthesia.

    PubMed

    Bergman, N A

    1992-10-01

    Michael Faraday (1791-1867) was a protégé of Humphry Davy. He became one of Davy's successors as Professor of Chemistry at the Royal Institution of Great Britain. Of Faraday's many brilliant discoveries in chemistry and physics, probably the best remembered today is his work on electromagnetic induction. Faraday's contribution to introduction of anesthesia was his published announcement in 1818 that inhalation of the vapor of ether produced the same effects on mentation and consciousness as the breathing of nitrous oxide. He most likely became familiar with the central nervous system effects of nitrous oxide through his association with Davy, an avid user of the gas. Sulfuric ether was a common, convenient, cheap, and easily available substance, in contrast to nitrous oxide, which required expensive, cumbersome, and probably not widely available apparatus for its production and administration. The capability for inhaling intoxicating vapors eventually became commonly available with the use of ether instead of the gas. The first surgical anesthetics were a consequence of the resulting student "ether frolics." The 1818 announcement on breathing ether vapor was published anonymously; however, notations in Faraday's handwriting in some of his personal books clearly establish Michael Faraday as the author of this brief communication. PMID:1416178

  11. Dynamical contribution into enzyme catalytic efficiency

    E-print Network

    A. E. Sitnitsky

    2006-03-31

    A realistic physical model for the so called rate promoting vibration (RPV) at enzyme action is constructed. The origin of the RPV is assumed to be an oscillating electric field produced by long-lived localized vibrational modes in protein dynamics, namely, by the so called discrete breather (DB) in secondary structure. The strength of interaction of the RPV with the reaction coordinate is evaluated and its effect on the reaction acceleration is assessed within the framework of modern theory for thermally activated escape rate at periodic driving. We reveal the phenomenon of resonant activation in our model elucidating why the frequency of the RPV in the range $100\\div200 cm^{-1}$ was chosen by the evolution of enzymes as an optimal one. The effect of the RPV on the reaction acceleration is shown to vary from moderate one (up to $10^3\\div10^4$) in the case of three-site DB to enormous (up to $10^6\\div10^8$) in the case of five-site DB and thus can significantly contribute into enzyme catalytic efficiency. Also the model is shown to be compatible with the known functional dependence of enzymatic reaction rates on solvent viscosity.

  12. Solar Physics

    NASA Technical Reports Server (NTRS)

    Wu, S. T.

    2000-01-01

    The areas of emphasis are: (1) develop theoretical models of the transient release of magnetic energy in the solar atmosphere, e.g., in solar flares, eruptive prominences, coronal mass ejections, etc.; (2) investigate the role of the Sun's magnetic field in the structuring of solar corona by the development of three-dimensional numerical models that describe the field configuration at various heights in the solar atmosphere by extrapolating the field at the photospheric level; (3) develop numerical models to investigate the physical parameters obtained by the ULYSSES mission; (4) develop numerical and theoretical models to investigate solar activity effects on the solar wind characteristics for the establishment of the solar-interplanetary transmission line; and (5) develop new instruments to measure solar magnetic fields and other features in the photosphere, chromosphere transition region and corona. We focused our investigation on the fundamental physical processes in solar atmosphere which directly effect our Planet Earth. The overall goal is to establish the physical process for the Sun-Earth connections.

  13. Gender and Physics: Feminist Philosophy and Science Education

    ERIC Educational Resources Information Center

    Rolin, Kristina

    2008-01-01

    Physics education reform movements should pay attention to feminist analyses of gender in the culture of physics for two reasons. One reason is that feminist analyses contribute to an understanding of a "chilly climate" women encounter in many physics university departments. Another reason is that feminist analyses reveal that certain styles of…

  14. Challenging stereotypes: Muslim girls talk about physical activity, physical education and sport

    Microsoft Academic Search

    Kelly Knez; Doune Macdonald; Rebecca Abbott

    2012-01-01

    Often labelled as ‘problematic’ within health and physical education (HPE) and sporting literature, young Muslim women's participation is frequently understood through both cultural and religious limitations seen to be placed upon them. Although these factors are negotiated by many young Muslim women, and contribute to the way in which some will understand and participate in physical activity, it would be

  15. Physical Education Teacher Education: Creating a Foundation to Increase the Status of Physical Education in Schools

    ERIC Educational Resources Information Center

    Richardson, Karen Pagnano

    2011-01-01

    Physical education teacher education (PETE) programs have contributed to the marginalization of physical education in three significant ways. First, the nature of content knowledge is contested. Is content knowledge disciplinary knowledge, or is movement the content knowledge of our field? Second, PETE has failed to produce a critical mass of K-12…

  16. Cerebellar contributions to spatial memory.

    PubMed

    Tomlinson, Simon P; Davis, Nick J; Morgan, Helen M; Bracewell, R Martyn

    2014-08-22

    There is mounting evidence for a role for the cerebellum in working memory (WM). The majority of relevant studies has examined verbal WM and has suggested specialisation of the right cerebellar hemisphere for language processing. Our study used theta burst stimulation (TBS) to examine whether there is a converse cerebellar hemispheric specialisation for spatial WM. We conducted two experiments to examine spatial WM performance before and after TBS to mid-hemispheric and lateral locations in the posterior cerebellum. Participants were required to recall the order of presentation of targets on a screen or the targets' order of presentation and their locations. We observed impaired recollection of target order after TBS to the mid left cerebellar hemisphere and reduced response speed after TBS to the left lateral cerebellum. We suggest that these results give evidence of the contributions of the left cerebellar cortex to the encoding and retrieval of spatial information. PMID:25004407

  17. PREFACE: 15th Russian Youth Conference on Physics and Astronomy (PhysicA.SPb)

    NASA Astrophysics Data System (ADS)

    Sokolovskii, Grigorii; Averkiev, Nikita

    2013-08-01

    The fifteenth Russian Youth Conference on Physics and Astronomy PhysicA.SPb was held 23-24 October 2012 in Saint-Petersburg, Russia. The Conference continues the tradition of Saint-Petersburg Seminars on Physics and Astronomy originating from the mid-90s. The main feature of PhysicA.SPb since then, remains the combination of both scientific and educational quality of the contributions delivered to the young audience. This feature makes it possible to combine the whole spectrum of modern Physics and Astronomy within one conference. PhysicA.SPb 2012 has brought together more than 150 students, young scientists and their professors from many universities and research institutes across Russia, as well as from Belarus, Ukraine, Finland, France and the United Kingdom. Oral and poster presentations were combined into a few well-defined sections among which one should name Astronomy and Astrophysics, Physics of semiconductors, Physics of solid state, Physics and technology of the alternative energetics, Nanostructured and thin-film materials, THz and UHF materials and devices, and Physics of the quantum-sized structures. This issue of the Journal of Physics: Conference Series presents the extended contributions from participants of PhysicA.SPb 2012 that were peer-reviewed by expert referees through processes administered by the Presiders of the Organising and Programme Committees to the best professional and scientific standards. Grigorii S. Sokolovskii and Nikita S. Averkiev Editors

  18. PREFACE: 16th Russian Youth Conference on Physics and Astronomy (PhysicA.SPb/2013)

    NASA Astrophysics Data System (ADS)

    2014-12-01

    The sixteenth Russian Conference on Physics and Astronomy PhysicA.SPb was held 23-24 October 2013 in Saint-Petersburg, Russia. The Conference continues the tradition of Saint-Petersburg Seminars on Physics and Astronomy originating from mid-90s. Since then PhysicA.SPb maintains both scientific and educational quality of contributions delivered to the young audience. This is the main feature of the Conference that makes it possible to combine the whole spectrum of modern Physics and Astronomy within one event. PhysicA.SPb/2013 has brought together about 200 students, young scientists and their colleague professors from many universities and research institutes across whole Russia as well as from Belarus, Ukraine, Switzerland, Turkey, Finland and France. Oral and poster presentations were combined into a few well-defined sections among which one should name Astronomy and Astrophysics, Plasma physics, hydro- and aero-dynamics, Physics of quantum-sized structures, Nanostructured and thin-film materials, Biophysics, THz and UHF materials and devices, Optoelectronic devices, Optics and spectroscopy, Atomic and elementary particles physics, Defects and impurities in solid state, Physics and technology of the alternative energetics. This issue of the Journal of Physics: Conference Series presents the extended contributions from participants of PhysicA.SPb/2013 that were peer-reviewed by expert referees through processes administered by the Presiders of the Organising and Programme Committees to the best professional and scientific standards. The Editors: Nikita S. Averkiev, Sergey A. Poniaev and Grigorii S. Sokolovskii

  19. Possible NASA Contributions to HEAT

    NASA Technical Reports Server (NTRS)

    Shepherd, J. M.

    2004-01-01

    A four-year experiment (HEAT) has been proposed (one summer in the field, 2005) to determine the sources and causes for the enhanced cloud-to-ground lightning over Houston, Texas, in association with simultaneous experiments by the Environmental Protection Agency (EPA) and the Texas Natural Resource Conservation Commission (TNRCC). Houston is the third most populous city in the United States and the region contains 50% of the petroleum refining capacity of the United States. Recent studies covering the period 1989-2000 document a 50% increase of cloud-to-ground lightning in the Houston area as compared to background values, which is second in flash density only to the Tampa Bay, Florida area. It is suggested that the elevated flash densities could result from several factors, including, 1) the convergence due to the urban heat island effect and complex sea breeze, and 2) the increasing levels of air pollution from anthropogenic sources producing numerous small droplets and thereby suppressing mean droplet size. The latter effect would enable more cloud water to reach the mixed phase region where it is involved in the formation of precipitation and the separation of electric charge, leading to an enhancement of lightning. The primary goals of HEAT are to examine the effects of (1) pollution, (2) the urban heat island, and (3) the complex coastline, on storms and lightning characteristics in the Houston area. The project is a multi- agency effort and will employ numerous observing capabilities and expertise. Dr. Shepherd has been asked to serve as a possible co- investigator to contribute expertise in areas related to urban impacts on precipitation variability. Dr. Shepherd is also a key NASA representative in the interagency effort. This presentation will provide an overview of recent NASA research focused on urban rainfall in Houston and offer potential NASA capabilities that could contribute to HEAT.

  20. New Physics and the Unitarity Triangle

    E-print Network

    David London

    1997-08-27

    After reviewing the present experimental constraints on the unitarity triangle, I discuss the various ways in which new physics can manifest itself in measurements of the parameters of the unitarity triangle. Apart from one exception, which I describe, new physics enters principally through new contributions to B0-B0(bar) mixing. Different models of new physics can be partially distinguished by looking at their effects on rare, flavour-changing $B$ penguin decays. (Invited talk given at the Symposium Twenty Beautiful Years of Bottom Physics, Chicago, IL, USA, June 29 -- July 2, 1997.)

  1. Physics of Forced Unsteady Separation

    NASA Technical Reports Server (NTRS)

    Carr, Lawrence W. (editor)

    1992-01-01

    This report contains the proceedings of a workshop held at NASA Ames Research Center in April 1990. This workshop was jointly organized by NASA, the Air Force Office of Scientific Research (AFOSR), and the Army Research Office (ARO), and was directed toward improved understanding of the physical processes that cause unsteady separation to occur. The proceedings contain the written contributions for the workshop, and include selected viewgraphs used in the various presentations.

  2. Solar Physics - Plasma Physics Workshop

    NASA Technical Reports Server (NTRS)

    Baum, P. J.; Beckers, J. M.; Newman, C. E.; Priest, E. R.; Rosenberg, H.; Smith, D. F.; Sturrock, P. A.; Wentzel, D. G.

    1974-01-01

    A summary of the proceedings of a conference whose purpose was to explore plasma physics problems which arise in the study of solar physics is provided. Sessions were concerned with specific questions including the following: (1) whether the solar plasma is thermal or non-themal; (2) what spectroscopic data is required; (3) what types of magnetic field structures exist; (4) whether magnetohydrodynamic instabilities occur; (5) whether resistive or non-magnetohydrodynamic instabilities occur; (6) what mechanisms of particle acceleration have been proposed; and (7) what information is available concerning shock waves. Very few questions were answered categorically but, for each question, there was discussion concerning the observational evidence, theoretical analyses, and existing or potential laboratory and numerical experiments.

  3. Department of Physics Department of Physics

    E-print Network

    Heller, Barbara

    Department of Physics Department of Physics Life Sciences Building 3101 S. Dearborn St. Chicago, IL 60616 312.567.3480 www.iit.edu/csl/physics Chair: Grant Bunder The Department of Physics offers B.S., M.S., and Ph.D. degrees in physics. Within the department, there are many opportunities for interdisciplinary

  4. 314 Department of Physics Department of Physics

    E-print Network

    Nagle, John F.

    314 Department of Physics Department of Physics Physics, one of the basic sciences, has its origin led to the detailed understanding of a remarkable variety of physical phenomena. Our knowledge now comprehension of the physical world forms an impressive part of the intellectual and cultural heritage of our

  5. Physics and Astronomy Radiation Safety Physics Concentration

    E-print Network

    Thaxton, Christopher S.

    Physics and Astronomy Radiation Safety Physics Concentration Strongly recommended courses Credits Environucleonics Lab 1 PHY 3211 Modern Physics II 3 PHY 3230 Thermal Physics 3 PHY 4330 Digital Electronics 3 PHY 4820 Medical Physics 3 CHE 1101 Intro. Chemistry I 3 CHE 1110 Intro. Chemistry I Lab 1 CHE 1102 Intro

  6. PHYSICS OF BURNING PHYSICS INACCESSIBLE TO

    E-print Network

    PHYSICS OF BURNING PLASMAS: PHYSICS INACCESSIBLE TO PRESENT FACILITIES FIRE Physics Workshop May 2000 F. Perkins and N. Sauthoff Princeton Plasma Physics Laboratory FIRE Workshop 1 May 2000 #12;OUTLINE · Introduction · Three Classes of Burning Plasma Physics inaccessable to contemporary tokamak

  7. Physics and Astronomy Engineering/Physics Concentration

    E-print Network

    Thaxton, Christopher S.

    Physics and Astronomy Engineering/Physics Concentration Strongly recommended courses Credits Term Electromagnetic Fields & Waves 3 PHY 3230 Thermal Physics 3 PHY 4020 Computational Methods in Physics.) taken Grade PHY 4620 Optics 4 PHY 3211 Modern Physics II 3 PHY 4730 Analog Circuits 3 PHY 4640 Quantum

  8. Physics (Phys) (Department of Physics and Engineering)

    E-print Network

    Dresden, Gregory

    229Physics Physics (Phys) (Department of Physics and Engineering) McCormick Foundation PROFESSORSILU INSTRUCTOR CUMMING VISITING PROFESSOR BOLLER MAJORS A major in physics leading to a Bachelor of Science degree requires completion of 50 credits including the following: 1. Physics 111, 112, 113, 114, 210, 215

  9. Department of Physics Department of Physics

    E-print Network

    Heller, Barbara

    Department of Physics Department of Physics Life Sciences Building 3101 S. Dearborn St. Chicago, IL 60616 312.567.3480 www.iit.edu/csl/physics Chair: Christopher White The Department of Physics offers B.S., M.S., and Ph.D. degrees in physics. Within the department, there are many opportunities

  10. SYLLABUS: PHYSICS 8120 PLASMA PHYSICS SPRING 2005

    E-print Network

    Wiita, Paul J.

    SYLLABUS: PHYSICS 8120 PLASMA PHYSICS SPRING 2005 Instructor: Prof. Paul J. Wiita Class Timings at an appropriate level. Other texts to which you may wish to refer: 1) Peter A. Sturrock, Plasma Physics 2) Nicholas A. Krall & Alvin W. Trivelpiece, Principles of Plasma Physics 3) Lyman Spitzer, Jr., Physics

  11. Physics Animations

    NSDL National Science Digital Library

    If you would like a taste of classical mechanics in an animated form, this website is right up your alley. This site from the physics department at the University of Toronto offers up over 100 helpful animations that cover quantum mechanics, vectors, waves, relativity, and optics. Visitors can scroll through the topical headings to look for items of interest and should note the entire website is searchable as well. There are some great topical animations here, such as one on fluid mechanics that involves a theoretical dropping of a ball from the CN Tower in Toronto. Animations have also been translated into Catalan, Spanish, and Basque.

  12. Higgs Physics

    E-print Network

    Krämer, M

    2015-01-01

    We discuss the interpretation of the LHC Higgs data and the test of the Higgs mechanism. This is done in a more model-independent approach relying on an effective Lagrangian, as well as in specific models like composite Higgs models and supersymmetric extensions of the Standard Model. The proper interpretation of the data requires the inclusion of higher-order corrections both for the relevant Higgs parameters and the production and decay processes. We review recent results obtained within the Collaborative Research Centre / Transregio 9 "Computational Particle Physics".

  13. Physics Applets

    NSDL National Science Digital Library

    These physics applets involve astrophysics, energy and environment, mechanics, and thermodynamics. The astrophysics applets are related to spectroscopy, photometry, orbital mechanics and cosmology, and include a simulation of colliding galaxies. The energy and environment applets are about weather, exponential growth, voltage, work, population growth and units, and include simulators of the global warming greenhouse effect and circuits. The mechanics applets involve motion in one and two dimensions, friction, energy conservation, and gravity as it relates to Kepler's third law. The thermodynamics applets explore the ideal gas law, Maxwellian velocity distribution, and thermodynamic equilibrium. There are also tools such as a graphing applet, FitsReader, and a spreadsheet.

  14. Higgs Physics

    E-print Network

    M. Krämer; M. Muhlleitner

    2015-02-23

    We discuss the interpretation of the LHC Higgs data and the test of the Higgs mechanism. This is done in a more model-independent approach relying on an effective Lagrangian, as well as in specific models like composite Higgs models and supersymmetric extensions of the Standard Model. The proper interpretation of the data requires the inclusion of higher-order corrections both for the relevant Higgs parameters and the production and decay processes. We review recent results obtained within the Collaborative Research Centre / Transregio 9 "Computational Particle Physics".

  15. Physics Discoveries

    NSDL National Science Digital Library

    The Physics Discoveries section of the National Science Foundation (NSF) website brings together a "panoply of discoveries and innovations that began with NSF support." Indeed, it is quite a panoply and visitors will enjoy scrolling through the dozens of resources presented here. The projects profiled include new gene sequencing, celebrations of Marie Curie's birthday, space turbulence studies, and quantum computing. Each of these resources includes a press release, video coverage related to each project, and a set of additional websites. Visitors can also print out relevant materials and share these links via a range of social media tools.

  16. Flipped physics

    NASA Astrophysics Data System (ADS)

    Kettle, Maria

    2013-09-01

    This paper defines flipped learning and then examines its practical implementation in AS and A2 level physics classes, that is, classes for 16-18 year olds. The effect of this teaching style on student learning behaviour and its impact on test results are evaluated. The paper recounts the difficulties of implementing it and evaluates student preferences. It concludes with comments about this teaching style’s appropriateness for various groups of students and identifies those for whom it is not suitable. A list of useful websites is included.

  17. Travailleurs âgés, nouvelles technologies et changements organisationnels : un réexamen à partir de l'enquête « Reponse ». Suivi d'un commentaire de Luc Behaghel : emploi des seniors - Des effets du changement technologique aux recommandations

    Microsoft Academic Search

    Patrick Aubert; Luc Behaghel; Sévane Ananian

    2006-01-01

    [fre] L'adoption par les entreprises d'innovations technologiques (micro-ordinateur, internet), de changements organisationnels ou leur ouverture au marché international posent la question de l'adaptation des travailleurs âgés (seniors) : les entreprises concernées évincent-elles plus souvent ou non les seniors de leur main-d'oeuvre ? L'analyse du stock d'emploi en 1998 confirme l'hypothèse d'un biais de ces changements défavorable aux seniors. Dans l'industrie

  18. Le dpartement d'Etudes Slaves de l'Universit Blaise Pascal propose aux tudiants un parcours complet en tudes russes depuis la premire anne de Licence. Le cursus de russe

    E-print Network

    Sart, Remi

    · Le département d'Etudes Slaves de l'Université Blaise Pascal propose aux étudiants un parcours étudiantes ont toutes deux préparé un Master 1 d'études Russophones toujours à l'Université Blaise Pascal. L toujours à l'Université Blaise Pascal et occupe conjointement un emploi à mi-temps tandis que l

  19. EDITORIAL: Physics competitions Physics competitions

    NASA Astrophysics Data System (ADS)

    Jordens, H.; Mathelitsch, L.

    2009-11-01

    1. Physics competitions: aims and realizations One aim of physics competitions is to increase the interest of young students, primarily at upper secondary level, to physics and natural sciences in general. A competition has motivational aspects known usually from sports events or games—comparing one's own ability with others, of course with the desire to be better and to win. If competitions reach nationwide and even international levels, additional stimulation is created. Competitions provide greatest attraction to possible winners, to the group of gifted people in a particular field. This implies that science contests are excellent tools for the promotion of talented students. Traditional teaching has been shown to have problems in supporting this group of students. Very often teachers are overstretched with the demands of teaching both low- and high-level students. Extracurricular activities are therefore a good chance to relieve the teacher, and to give talented students the opportunity for appropriate training and challenge. The competitions, however, have a broader impact and address more young people than one might guess from the statements above. Training courses and selection at school level give a larger group of students extra and, to some extent, complimentary education in physics. The degree of complexity of the tasks corresponds very often to the standards of the next level of education in the school system. Interestingly, many physics competitions have their origin in countries beyond the former Iron Curtain. They started as regional and national tournaments, were joined by neighbouring countries and have grown, in some cases, to events with participants from more than 80 countries. Although the features mentioned above are common to the different competitions, there are distinct differences between them [1]. The International Physics Olympiad (IPhO) is the oldest international physics competition for students at upper secondary level [2]. It dates back to 1967, when the first Olympiad was organized in Warsaw, Poland. Today this Olympiad is a worldwide enterprise, and in the 2008 competition in Hanoi, Vietnam, students from 82 countries took part. An overview of the problems and a summary of the results of this Olympiad are given in the first paper, prepared by the organizers of the competition [3]. The students work on four or five different problems, three theoretical ones on one day, and one or two experimental tasks on another. On each day, they have five hours to accomplish their tasks. The problems are prepared by the local organizer, usually a team of physicists from universities in the home country. The level is set by an international syllabus, and the content and wording of the problems have to be agreed by a majority of the supervisors (one from each participating country) in an initial meeting. Afterwards the tasks are translated into the various languages of the competitors; the students also write their results in their own language. The number of awards (gold, silver and bronze, as well as honorable mentions) varies from competition to competition, since it depends on the number of participants. A team consists of at most five students, but they do not act as a team—they work independantly. The selection process in individual countries varies, but is usually executed in several steps, starting from school competitions and going on to regional and national ones. Training courses are often organized on the same levels. Big differences can be seen in training courses at the highest level, the duration ranging from one week to several months. The International Young Physicists Tournament (IYPT) is completely different in spirit [4]. Whereas the students work individually in the Olympiad, IYPT is a competition between teams. In addition, the 17 tasks are known almost a year in advance. The problems are very open, allow for different approaches and include experimental as well as theoretical work. The students are allowed to use any method they like, are coached by teachers, and are encouraged

  20. Physics and Society: A sub-discipline of Physics

    NASA Astrophysics Data System (ADS)

    Hafemeister, David

    2012-03-01

    The Forum on Physics and Society was born in the tumultuous 1960's and 70's and has a long record of accomplishments over the past 40 years. *303 APS session in 40 years, an average of 7.7/year. *10 Books (3 Forum Studies, 7 AIP Conf. Proceedings, 4 booklets). *Physics and Society has published results that have been widely referenced. *2 Forum Board Members became U.S. Congressmen [V. Ehlers (R-MI), R. Holt (D-NJ)], others have had notable public service careers. *Szilard and Burton-Forum Awards recognize positive contributions of physicists in society. *The Forum helped establish the Congressional Science Fellowships. This talk will update the 1999 Forum History (http://www.aps.org/units/fps/history.cfm) and provide anecdotal humor. Lastly, back-of-the-envelope calculations from my text, Physics of Society Issues: Calculations on National Security, Environment and Energy (Springer, 2007), will be provided.

  1. January 2010 Physics 3300

    E-print Network

    deYoung, Brad

    1 January 2010 Physics 3300 Introduction to Physical Oceanography Instructor: Brad de Young Physics and Physical Oceanography Memorial University, bdeyoung@mun.ca Room C-3000 737-8738 Physics 3300 Introduction to Physical Oceanography deals with the physics of the processes in the ocean, providing an integrating view

  2. DET/MPS - THE GSFC ENERGY BALANCE PROGRAM, DIRECT ENERGY TRANSFER/MULTIMISSION SPACECRAFT MODULAR POWER SYSTEM (MACINTOSH A/UX VERSION)

    NASA Technical Reports Server (NTRS)

    Jagielski, J. M.

    1994-01-01

    The DET/MPS programs model and simulate the Direct Energy Transfer and Multimission Spacecraft Modular Power System in order to aid both in design and in analysis of orbital energy balance. Typically, the DET power system has the solar array directly to the spacecraft bus, and the central building block of MPS is the Standard Power Regulator Unit. DET/MPS allows a minute-by-minute simulation of the power system's performance as it responds to various orbital parameters, focusing its output on solar array output and battery characteristics. While this package is limited in terms of orbital mechanics, it is sufficient to calculate eclipse and solar array data for circular or non-circular orbits. DET/MPS can be adjusted to run one or sequential orbits up to about one week, simulated time. These programs have been used on a variety of Goddard Space Flight Center spacecraft projects. DET/MPS is written in FORTRAN 77 with some VAX-type extensions. Any FORTRAN 77 compiler that includes VAX extensions should be able to compile and run the program with little or no modifications. The compiler must at least support free-form (or tab-delineated) source format and 'do do-while end-do' control structures. DET/MPS is available for three platforms: GSC-13374, for DEC VAX series computers running VMS, is available in DEC VAX Backup format on a 9-track 1600 BPI tape (standard distribution) or TK50 tape cartridge; GSC-13443, for UNIX-based computers, is available on a .25 inch streaming magnetic tape cartridge in UNIX tar format; and GSC-13444, for Macintosh computers running AU/X with either the NKR FORTRAN or AbSoft MacFORTRAN II compilers, is available on a 3.5 inch 800K Macintosh format diskette. Source code and test data are supplied. The UNIX version of DET requires 90K of main memory for execution. DET/MPS was developed in 1990. A/UX and Macintosh are registered trademarks of Apple Computer, Inc. VMS, DEC VAX and TK50 are trademarks of Digital Equipment Corporation. UNIX is a registered trademark of AT&T Bell Laboratories.

  3. Leaks in Brain May Contribute to Dementia

    MedlinePLUS

    ... on this page, please enable JavaScript. Leaks in Brain May Contribute to Dementia Study finds blood vessels ... News) -- Age-related blood vessel leaks in the brain may contribute to the development of Alzheimer's disease ...

  4. 31 CFR 537.414 - Charitable contributions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...this part, no charitable contribution of funds, goods, services, or technology, including contributions to relieve human suffering, such as food, clothing, or medicine, may be made by, to, or for the benefit of, or received from, a person whose...

  5. 31 CFR 560.426 - Charitable contributions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...this part, no charitable contribution of funds, goods, services, or technology, including contributions to relieve human suffering, such as food, clothing or medicine, may be made by, to, or for the benefit of, or received from, the Government of...

  6. 31 CFR 588.408 - Charitable contributions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ...this part, no charitable contribution of funds, goods, services, or technology, including contributions to relieve human suffering, such as food, clothing or medicine, may be made by, to, or for the benefit of, or received from, a person whose...

  7. 31 CFR 549.408 - Charitable contributions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ...this part, no charitable contribution of funds, goods, services, or technology, including contributions to relieve human suffering, such as food, clothing or medicine, may be made by, to, or for the benefit of, or received from, a person whose...

  8. On Ramachandra's Contributions to Transcendental Number Theory

    E-print Network

    Paris-Sud XI, Université de

    On Ramachandra's Contributions to Transcendental Number Theory Michel WALDSCHMIDT Universit P. et M(C) for the complex topology? The other contributions of Ramachandra to transcendental number theory are dealt

  9. Coauthorship in Physics

    NASA Astrophysics Data System (ADS)

    Tarnow, Eugen

    2002-06-01

    In a large and detailed survey on the ethics of scientific coauthorship, members of the American Physical Society (APS) were asked to judge the number of appropriate coauthors on his or her last published paper. Results show that the first or second coauthor are more appropriate than later coauthors about whom there is equal and considerable doubt. The probability of any third and subsequent coathors being judged as inappropriate is 23% for the APS guideline, 67% for the tighter guideline of the International Committee of Medical Journal Editors, 59% if the guideline requires "direct contributions to scientific discovery or invention". Only 3% of respondents report having personally rejected an undeserving scientist who expected to be an author on the last published paper. Respondents seem to be divided into two non-overlapping populations - those who report no inappropriate coauthorship and those who have a more graduated view.

  10. The contribution of media analysis to the evaluation of environmental interventions: the Commuting and Health in Cambridge study

    E-print Network

    Kesten, Joanna; Cohn, Simon; Ogilvie, David

    2014-05-21

    , promotional media dis- courses from stakeholders emphasised anticipated bene- fits of the busway, such as that it would provide reliable, frequent, fast, good value for money, all of which are known to be important in the selection of mode of transport... RESEARCH ARTICLE The contribution of media Active travel, physical activity and health Globally, physical inactivity is the fourth leading risk factor with higher total physical activity [5,6] and physical well- being [7] and lower cardiovascular...

  11. Scalar contribution to the BFKL kernel

    SciTech Connect

    Gerasimov, R. E., E-mail: R.E.Gerasimov@gmail.com; Fadin, V. S., E-mail: Fadin@inp.nsk.s [Russian Academy of Sciences, Budker Institute of Nuclear Physics, Siberian Division (Russian Federation)

    2010-07-15

    The contribution of scalar particles to the kernel of the Balitsky-Fadin-Kuraev-Lipatov (BFKL) equation is calculated. A great cancellation between the virtual and real parts of this contribution, analogous to the cancellation in the quark contribution in QCD, is observed. The reason of this cancellation is discovered. This reason has a common nature for particles with any spin. Understanding of this reason permits to obtain the total contribution without the complicated calculations, which are necessary for finding separate pieces.

  12. Capabilities and Contributions of Unwed Fathers

    Microsoft Academic Search

    Robert I. Lerman

    2010-01-01

    Summary:Young, minority, and poorly educated fathers in fragile families have little capacity to support their children financially and are hard-pressed to maintain stability in raising those children. In this article, Robert Lerman examines the capabilities and contributions of unwed fathers, how their capabilities and contributions fall short of those of married fathers, how those capabilities and contributions differ by the

  13. Capabilities and Contributions of Unwed Fathers

    Microsoft Academic Search

    Robert I. Lerman

    2010-01-01

    Young, minority, and poorly educated fathers in fragile families have little capacity to support their children financially and are hard-pressed to maintain stability in raising those children. In this article, Robert Lerman examines the capabilities and contributions of unwed fathers, how their capabilities and contributions fall short of those of married fathers, how those capabilities and contributions differ by the

  14. The contribution of psychology to education

    Microsoft Academic Search

    Edward L. Thorndike

    1910-01-01

    Outlines the contributions of psychology to an understanding of the aims, materials, means and methods of education. The three ways in which psychology contributes to a knowledge of methods of teaching are delineated. The work done by psychologists which is of special significance to the theory and practice of education have also been discussed. Incidental contributions from studies of sensory

  15. 26 CFR 1.401(m)-1 - Employee contributions and matching contributions.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... (2) Automatic satisfaction by certain plans...satisfied with respect to employee contributions...the plan to which the employee contributions or matching...plan that provides for employee contributions or matching...plan must provide for satisfaction of...

  16. 26 CFR 1.401(m)-1 - Employee contributions and matching contributions.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... (2) Automatic satisfaction by certain plans...satisfied with respect to employee contributions...the plan to which the employee contributions or matching...plan that provides for employee contributions or matching...plan must provide for satisfaction of...

  17. 26 CFR 1.401(m)-1 - Employee contributions and matching contributions.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... (2) Automatic satisfaction by certain plans...satisfied with respect to employee contributions...the plan to which the employee contributions or matching...plan that provides for employee contributions or matching...plan must provide for satisfaction of...

  18. IDS contribution to ITRF2008

    NASA Astrophysics Data System (ADS)

    Valette, Jean-Jacques; Lemoine, Frank G.; Ferrage, Pascale; Yaya, Philippe; Altamimi, Zuheir; Willis, Pascal; Soudarin, Laurent

    2010-12-01

    For the first time, the International DORIS Service (IDS) has produced a technique level combination based on the contributions of seven analysis centers (ACs), including the European Space Operations Center (ESOC), Geodetic Observatory Pecny (GOP), Geoscience Australia (GAU), the NASA Goddard Space Flight Center (GSFC), the Institut Géographique National (IGN), the Institute of Astronomy, Russian Academy of Sciences (INASAN, named as INA), and CNES/CLS (named as LCA). The ACs used five different software packages to process the DORIS data from 1992 to 2008, including NAPEOS (ESA), Bernese (GOP), GEODYN (GAU, GSC), GIPSY/OASIS (INA), and GINS (LCA). The data from seven DORIS satellites, TOPEX/Poseidon, SPOT-2, SPOT-3, SPOT-4, SPOT-5, Envisat and Jason-1 were processed and all the analysis centers produced weekly SINEX files in either variance-covariance or normal equation format. The processing by the analysis centers used the latest GRACE-derived gravity models, forward modelling of atmospheric gravity, updates to the radiation pressure modelling to improve the DORIS geocenter solutions, denser parameterization of empirically determined drag coefficients to improve station and EOP solutions, especially near the solar maximum in 2001-2002, updated troposphere mapping functions, and an ITRF2005-derived station set for orbit determination, DPOD2005. The CATREF software was used to process the weekly AC solutions, and produce three iterations of an IDS global weekly combination. Between the development of the initial solution IDS-1, and the final solution, IDS-3, the ACs improved their analysis strategies and submitted updated solutions to eliminate troposphere-derived biases in the solution scale, to reduce drag-related degradations in station positioning, and to refine the estimation strategy to improve the combination geocenter solution. An analysis of the frequency content of the individual AC geocenter and scale solutions was used as the basis to define the scale and geocenter of the IDS-3 combination. The final IDS-3 combination has an internal position consistency (WRMS) that is 15 to 20 mm before 2002 and 8 to 10 mm after 2002, when 4 or 5 satellites contribute to the weekly solutions. The final IDS-3 combination includes solutions for 130 DORIS stations on 67 different sites of which 35 have occupations over 16 years (1993.0-2009.0). The EOPs from the IDS-3 combination were compared with the IERS 05 C04 time series and the RMS agreement was 0.24 mas and 0.35 mas for the X and Y components of polar motion. The comparison to ITRF2005 in station position shows an agreement of 6 to 8 mm RMS in horizontal and 10.3 mm in height. The RMS comparison to ITRF2005 in station velocity is at 1.8 mm/year on the East component, to 1.2 mm/year in North component and 1.6 mm/year in height.

  19. Aerosol contributions to speleothem geochemistry

    NASA Astrophysics Data System (ADS)

    Dredge, J. A.; Fairchild, I. J.; Harrison, R.; Woodhead, J. D.; Hellstrom, J.

    2011-12-01

    The term "aerosols" encompasses the suspension of both fine solid or liquid particles within a gaseous medium. Aerosols become suspended into the earth's atmosphere through a multitude of processes both natural and anthropogenic. Atmospheric aerosols enter cave networks as a result of cave ventilation processes and are either deposited, or cycled and removed from the system. Speleothem offer a multiproxy palaeoclimate resource; many of the available proxies have been extensively investigated and utilised for palaeoclimatic reconstructions in a range of studies. The potential contribution of aerosols to speleothem chemistry and their applicability for palaeoenvironmental reconstructions remains untested and the extent of their value as an addition to palaeoclimate sciences unknown. Aerosols through incorporation into speleothem may provide a novel palaeoenvironmental resource. The aerosol component of interest is that which is transported into the cave atmosphere and deposited and are available for incorporation into precipitated calcite. Aerosol deposition and therefore distribution in the cave has shown to be a complex function of ventilation and changing environmental factors. Through detailed monitoring aerosols have been detected, identified, characterised and quantified to determine their prominence in the cave system. Investigations are on a case study basis, searching for suitable aerosol proxies of environmentally significant emission processes. Case studies include: Palaeofires at Yarrangobilly Caves, Australia; anthropogenic emissions at St Michaels Cave, Gibraltar and Cheddar gorge, UK; and drip water aerosol production and geochemical addition in Obir cave, Austria. Monitoring has allowed for the temporal and spatial determination of aerosols in karst networks. Speleothem samples will be analysed in combination with in-situ monitoring to determine incorporation factors and record preservation. By understanding how aerosols are transmitted within the cave and ultimately incorporated into speleothems, a record of aerosol emission event frequency, intensity and timing can be produced and directly correlated with changing palaeoclimate. Speleothem through aerosol incorporation have the potential to preserve a record of a multitude of processes not yet constrained by previously investigated proxies, providing an additional dimension to speleological palaeoenvironmental investigations.

  20. The Future of Theoretical Physics and Cosmology

    NASA Astrophysics Data System (ADS)

    Gibbons, G. W.; Shellard, E. P. S.; Rankin, S. J.

    2003-11-01

    Based on lectures given in honor of Stephen Hawking's 60th birthday, this book comprises contributions from the world's leading theoretical physicists. Popular lectures progress to a critical evaluation of more advanced subjects in modern cosmology and theoretical physics. Topics covered include the origin of the universe, warped spacetime, cosmological singularities, quantum gravity, black holes, string theory, quantum cosmology and inflation. The volume provides a fascinating overview of the variety of subjects to which Stephen Hawking has contributed.

  1. Physical Properties

    NSDL National Science Digital Library

    David Teegarden

    2004-01-01

    In several of the previous chapters we have talked about the strength of polymers and pointed out some of the unusual properties that make them both interesting and extremely useful materials. Now it is time to understand some of the fundamental reasons for this behavior. We will examine the structure of polymers a bit more carefully so that we can better understand their physical and mechanical properties and discover why plastics such as HDPE (high-density polyethylene), PS (polystyrene), and Kevlar are so different from each other. In this case, the "structure" on which we will focus is the morphology of the sample. We will see that polymers characteristically have amorphous and/or crystalline morphologies.

  2. Using internet assessment tools for health and physical education instruction

    Microsoft Academic Search

    Roland Thornburg; Kory Hill

    2004-01-01

    Conclusions  Physical education should provide opportunities for students to participate in activities that promote fitness and well-being.\\u000a Implementing best practices into the physical education curriculum can contribute to the understanding and application of\\u000a a healthy lifestyle for students. Technology applied in the physical education curriculum can provide an opportunity for improved\\u000a instruction and enhanced student learning in physical education. The current

  3. Negative phototropism is seen in Arabidopsis inflorescences when auxin signaling is reduced to a minimal level by an Aux/IAA dominant mutation, axr2.

    PubMed

    Sato, Atsuko; Sasaki, Shu; Matsuzaki, Jun; Yamamoto, Kotaro T

    2015-03-01

    Inflorescences of a dominant mutant of Arabidopsis Aux/IAA7, axr2, showed negative phototropism with a similar fluence response curve to the positive phototropism of wild-type stems. Application of a synthetic auxin, NAA, and an inhibitor of polar auxin transport, NPA, increased and decreased respectively the magnitude of the phototropic response in the wild type, while in axr2 application of NAA reduced the negative phototropic response and NPA had no effect. Decapitation of the apex induced a small negative phototropism in wild-type stems, and had no effect in axr2 plants. Inflorescences of the double mutants of auxin transporters, pgp1 pgp19, showed no phototropic response, while decapitation resulted in a negative phototropic response. These results suggest that negative phototropism can occur when the level of auxin or of auxin signaling is reduced to a minimal level, and that in plant axial organs the default phototropic response to unilateral blue light may be negative. Expression of axr2 protein by an endodermis-specific promoter resulted in agravitropism of inflorescences in a similar way to that of axr2, but phototropism was normal, confirming that the endodermis does not play a critical role in phototropism. PMID:25738325

  4. Ampleur et impact des évènements indésirables graves liés aux soins: étude d'incidence dans un hôpital du Centre-Est tunisien

    PubMed Central

    Bouafia, Nabiha; Bougmiza, Iheb; Bahri, Fathi; Letaief, Mondher; Astagneau, Pascal; Njah, Mansour

    2013-01-01

    Introduction La prévention des événements indésirables représente une priorité de santé du fait de leur fréquence et de leur gravité potentielle. Ce travail a été mené afin d'avoir un diagnostic de la situation épidémiologique relative aux événements indésirables survenant dans notre hôpital. Méthodes Une étude prospective a été menée auprès de tous les patients qui ont été hospitalisés au CHU Farhat Hached - Sousse (Tunisie) sur une période d'un mois dans quatorze services de l'hôpital. La détection d'évènement indésirable grave (EIG) était basée sur les critères adoptés dans différentes études. Les tests T et Chi 2 ont été utilisés pour identifier les facteurs contribuant à l'apparition d'évènements indésirables. Résultats Au total, 162 EIG ont été identifiés pendant la période. 45% de ces évènements étaient des infections nosocomiales. Ces EIG ont eu comme conséquences un décès chez 9,2% des patients, la mise en jeu du pronostic vital de 26% des patients et la prolongation de la durée de séjour chez 61,7% d'entre eux. L'admission dans des circonstances particulières et l'exposition à des soins invasifs étaient identifiés comme des facteurs de risque potentiels EIG. Conclusion Le renforcement de la stratégie de gestion des risques sanitaires en ciblant préférentiellement le risque infectieux constitue une étape fondamentale dans l'amélioration de la sécurité des patients au sein de notre établissement de santé. PMID:24711868

  5. Pronounced matrix effect in YbMo2Al4-type Ca(AuxZn2-x)Au4 (x=0.09-0.89)

    NASA Astrophysics Data System (ADS)

    Mishra, Trinath; Lin, Qisheng; Corbett, John D.

    2014-10-01

    Electron-poor polar intermetallics Ca(AuxZn2-x)Au4 have been synthesized through fusion of stoichiometric metals in sealed tantalum tubes at 800 °C and annealing at 400 °C for one week. Single crystal X-ray diffraction analyses reveal that this phase belongs to the YbMo2Al4-type structure (I4/mmm, Pearson symbol tI14), a?6.943-7.017 Å, c?5.278-5.286 Å, Z=2, with homogeneous composition range of x=0.09(1)-0.89(1). The structure exhibits a three-dimensional framework of (Au8)1/2 featuring square and octagonal channels extending in c, in which Ca and the infinite linear chains of [(Au,Zn)2]1/2 are located, respectively. Mulliken population analyses demonstrate that Zn prefers to form the linear chains in the whole homogeneous composition range, consistent with experimental observations. Crystal orbital Hamilton population (COHP) analyses reveal that the channel-to-chain Au-Zn contact has strong bonding interactions regardless of its large interatomic distance (~2.85 Å), a signature of pronounced matrix effect. The last mentioned effect in YbMo2Al4-type structures is expected in case the linear chains are defined by small size atoms.

  6. Physics Based University Courses

    ERIC Educational Resources Information Center

    Beeby, J. L.

    1974-01-01

    Two physics courses which serve as alternatives to general college courses in physics are outlined: physics with astrophysics and physics with electronics. Details are given of the structure of the courses and third year options are specified. (DT)

  7. Physics 6321 Coastal oceanography

    E-print Network

    deYoung, Brad

    Physics 6321 Coastal oceanography · Instructor: Dr. Iakov Afanassiev · Office: Physics C-4065 · email: yakov@physics.mun.ca · Course Times: TBD Room TBD · Office Hours: unlimited · Web Page: http://www.physics

  8. Anatomical and Physiological Factors Contributing to Chronic Muscle Pain

    PubMed Central

    Gregory, Nicholas S.; Sluka, Kathleen A.

    2015-01-01

    Chronic muscle pain remains a significant source of suffering and disability despite the adoption of pharmacologic and physical therapies. Muscle pain is mediated by free nerve endings distributed through the muscle along arteries. These nerves project to the superficial dorsal horn and are transmitted primarily through the spinothalamic tract to several cortical and subcortical structures, some of which are more active during the processing of muscle pain than other painful conditions. Mechanical forces, ischemia, and inflammation are the primary stimuli for muscle pain, which is reflected in the array of peripheral receptors contributing to muscle pain-ASIC, P2X, and TRP channels. Sensitization of peripheral receptors and of central pain processing structures are both critical for the development and maintenance of chronic muscle pain. Further, variations in peripheral receptors and central structures contribute to the significantly greater prevalence of chronic muscle pain in females. PMID:24633937

  9. Communities of on-line physics educators

    NASA Astrophysics Data System (ADS)

    MacIsaac, Dan

    2000-04-01

    I briefly describe the nature, content, scope, history, and culture of PHYS-L and related electronic mailing lists dedicated to the teaching and learning of physics (including PHYSHARE, TAP-L and PhysLrnR). I also describe etiquette and writing guidelines for contributing to discussions on mailing lists. Finally, I review technical guidelines for controlling physics list subscriptions and related archive software.

  10. Physics teaching in developing countries

    NASA Astrophysics Data System (ADS)

    Talisayon, V. M.

    1984-05-01

    The need for endogeneous learning materials that will relate physics to the student's culture and environment spurred countries like India, Thailand, The Philippines and Indonesia to develop their own physics curriculum materials and laboratory equipment. Meagre resources and widespread poverty necessitated the development of laboratory materials from everyday items, recycled materials and other low-cost or no-cost local materials. The process of developing learning materials for one's teaching-learning needs in physics and the search from within for solutions to one's problems contribute in no small measure to the development of self-reliance in physics teaching of a developing country. Major concerns of developing countries are food supply, livelihood, health, nutrition and growth of economy. At the level of the student and his family, food, health, and livelihood are also primary concerns. Many physics teaching problems can be overcome on a large scale, given political support and national will. In countries where national leadership recognises that science and technology developed is essential to national development and that science education in turn is crucial to science and technology development, scarce resources can be allocated to science education. In developing countries where science education receives little or no political support, the most important resource in the physics classroom is the physics teacher. A highly motivated and adequately trained teacher can rise above the constraining circumstances of paucity of material resources and government apathy. In developing countries the need is great for self-reliance in physics teaching at the country level, and more importantly at the teacher level.

  11. Physical Plant Strategic Plan 2010 PHYSICAL PLANT

    E-print Network

    Westfall, Peter H.

    Physical Plant Strategic Plan ­ 2010 1 PHYSICAL PLANT 2010 STRATEGIC PLAN Strategic Planning and Assessment Reports MISSION STATEMENT The Physical Plant provides building and service environments conducive Physical Plant will be recognized both within the university and externally as an efficient and effective

  12. Physics Procedia 00 (2013) 15 Physics Procedia

    E-print Network

    Adler, Joan

    2013-01-01

    Physics Procedia 00 (2013) 1­5 Physics Procedia Educating the next generation of Computational Physicists Joan Adler Physics Department, Technion -IIT, Haifa, Israel, 32000 Abstract Many "senior" Computational Physics researchers began their careers perched on of the other vertices of the Landau triangle

  13. People's Physics Book The People's Physics Book

    E-print Network

    California at Santa Cruz, University of

    #12;People's Physics Book The People's Physics Book Authors James H. Dann, Ph.D. James J. Dann. All rights reserved. Textbook Website http://scipp.ucsc.edu/outreach/index2.html #12;People's Physics) "Each discovery, each advance, each increase in the sum of human riches, owes its being to the physical

  14. Physics and Astronomy Chemical Physics Concentration

    E-print Network

    Thaxton, Christopher S.

    Physics and Astronomy Chemical Physics Concentration Strongly recommended courses Credits Term Dept Fields & Waves 3 PHY 3230 Thermal Physics 3 PHY 4640 Quantum Mechanics 3 PHY 4020 Computational Methods in Physics & Engineering 3 PHY 4330 Digital Electronics 3 CHE 1101 Intro. Chemistry I 3 CHE 1110 Intro

  15. People's Physics Book The People's Physics Book

    E-print Network

    California at Santa Cruz, University of

    People's Physics Book The People's Physics Book Authors James H. Dann, Ph.D. James J. Dann. All rights reserved. Textbook Website http://scipp.ucsc.edu/outreach/index2.html #12;People's Physics) "Each discovery, each advance, each increase in the sum of human riches, owes its being to the physical

  16. Physics Procedia 00 (2013) 16 Physics Procedia

    E-print Network

    Adler, Joan

    2013-01-01

    Physics Procedia 00 (2013) 1­6 Physics Procedia Educating the next generation of Computational Physicists Joan Adler Physics Department, Technion -IIT, Haifa, Israel, 32000 Abstract Many "senior" Computational Physics researchers began their careers perched on of the other vertices of the Landau triangle

  17. Teaching Physics with the Physics Suite

    NSDL National Science Digital Library

    Redish, Edward F.

    This book provides a brief introduction to the implications of Physics Education Research for physics instruction and can be used as a handbook for improving physics teaching. The author reviews the cognitive basis for the current instructional concensus in PER and discusses a dozen popular active-engagement teaching methods and many various methods and tools to improve physics instruction.

  18. SYLLABUS: PHYSICS 8120 PLASMA PHYSICS FALL 2007

    E-print Network

    Wiita, Paul J.

    SYLLABUS: PHYSICS 8120 PLASMA PHYSICS FALL 2007 Instructor: Prof. Paul J. Wiita Class Timings time. Required Text: Russell M. Kulsrud, Plasma Physics for Astrophysics (Princeton University Press A. Sturrock, Plasma Physics 3) Nicholas A. Krall & Alvin W. Trivelpiece, Principles of Plasma

  19. SYLLABUS: PHYSICS 8120 PLASMA PHYSICS FALL 2007

    E-print Network

    Wiita, Paul J.

    SYLLABUS: PHYSICS 8120 PLASMA PHYSICS FALL 2007 Instructor: Prof. Paul J. Wiita Class Timings to see me at some other time. Required Text: Russell M. Kulsrud, Plasma Physics for Astrophysics and Fluids 2) Peter A. Sturrock, Plasma Physics 3) Nicholas A. Krall & Alvin W. Trivelpiece, Principles

  20. PREFACE: 31st European Physical Society Conference on Plasma Physics

    NASA Astrophysics Data System (ADS)

    Dendy, Richard

    2004-12-01

    This special issue of Plasma Physics and Controlled Fusion comprises refereed papers contributed by invited speakers at the 31st European Physical Society Conference on Plasma Physics. The conference was jointly hosted by the Rutherford Appleton Laboratory, by the EURATOM/UKAEA Fusion Association and by Imperial College London, where it took place from 28 June to 2 July 2004. The overall agenda for this conference was set by the Board of the Plasma Physics Division of the European Physical Society, chaired by Friedrich Wagner (MPIPP, Garching) and his successor Jo Lister (CRPP, Lausanne). It built on developments in recent years, by further increasing the scientific diversity of the conference programme, whilst maintaining its depth and quality. A correspondingly diverse Programme Committee was set up, whose members are listed below. The final task of the Programme Committee has been the preparation of this special issue. In carrying out this work, as in preparing the scientific programme of the conference, the Programme Committee formed specialist subcommittees representing the different fields of plasma science. The chairmen of these subcommittees, in particular, accepted a very heavy workload on behalf of their respective research communities. It is a great pleasure to take this opportunity to thank: Emilia R Solano (CIEMAT, Madrid), magnetic confinement fusion; Jürgen Meyer-ter-Vehn (MPQ, Garching), laser-plasma interaction and beam plasma physics; and Jean-Luc Dorier (CRPP, Lausanne), dusty plasmas. The relatively few papers in astrophysical and basic plasma physics were co-ordinated by a small subcommittee which I led. Together with Peter Norreys (RAL, Chilton), we five constitute the editorial team for this special issue. The extensive refereeing load, compressed into a short time interval, was borne by the Programme Committee members and by many other experts, to whom this special issue owes much. We are also grateful to the Local Organizing Committee chaired by Henry Hutchinson (RAL, Chilton), and to the Plasma Physics and Controlled Fusion journal team (Institute of Physics Publishing, Bristol), for their work on this conference. At the 2004 European Physical Society Conference on Plasma Physics, plenary invited speakers whose talks spanned the entire field were followed, each day, by multiple parallel sessions which also included invited talks. Invited speakers in both these categories were asked to contribute papers to this special issue (the contributed papers at this conference, and at all recent conferences in this series, are archived at http://epsppd.epfl.ch). The Programme Committee is very grateful to the many invited speakers who have responded positively to this request. Invited papers appear here in their order of presentation during the week beginning 28 June 2004; this ordering provides an echo of the character of the conference, as it was experienced by those who took part. Programme Committee 2004 Professor Richard Dendy UKAEA Culham Division, UK Chairman and guest editor Dr Jean-Luc Dorier Centre de Recherches en Physique des Plasmas, Lausanne, Switzerland (Co-ordinator of dusty plasmas and guest editor) Professor Jürgen Meyer-ter-Vehn Max-Planck-Institut für Quantenoptik, Garching, Germany (Co-ordinator of laser-plasma interaction and beam plasma physics and guest editor) Dr Peter Norreys Rutherford Appleton Laboratory, Chilton, UK (Scientific Secretary and guest editor) Dr Emilia R Solano CIEMAT Laboratorio Nacional de Fusión, Madrid, Spain ( Co-ordinator of magnetic confinement fusion and guest editor) Dr Shalom Eliezer Soreq Nuclear Research Centre, Israel Dr Wim Goedheer FOM-Instituut voor Plasmafysica, Rijnhuizen, Netherlands Professor Henry Hutchinson Rutherford Appleton Laboratory, Chilton, UK Professor John Kirk Max-Planck-Institut für Kernphysik, Heidelberg, Germany Dr Raymond Koch Ecole Royale Militaire/Koninklijke Militaire School, Brussels, Belgium Professor Gerrit Kroesen Technische Universiteit Eindhoven, Netherlands Dr Martin Lampe Naval Research Laboratory, Washington DC,