WorldWideScience

Sample records for sports hall leaving

  1. High-performance LED luminaire for sports hall

    Science.gov (United States)

    Lee, Xuan-Hao; Yang, Jin-Tsung; Chien, Wei-Ting; Chang, Jung-Hsuan; Lo, Yi-Chien; Lin, Che-Chu; Sun, Ching-Cherng

    2015-09-01

    In this paper, we present a luminaire design with anti-glare and energy-saving effects for sports hall. Compared with traditional lamps using in a badminton court, the average illuminance on the ground of the proposed LED luminaire is enhanced about 300%. Besides, the uniformity is obviously enhanced and improved. The switch-on speed of lighting in sports hall is greatly reduced from 5-10 minutes to 1 second. The simulation analysis and the corresponding experiment results are demonstrated.

  2. Maximizing utilization of sport halls during peak hours

    DEFF Research Database (Denmark)

    Iversen, Evald Bundgård; Forsberg, Peter

    the number of participants 7.5 persons higher pr. activity compared to club activities. This implies that clubs during peak hours could include more participants. Another possibility to increase utilization is if the management of sport facilities forced sport clubs and other organisers to adapt......BACKGROUNDDuring peak hours (4.30pm-8pm) demand for timeslots in sport halls in Denmark are high and there are few timeslots available. Further, focus on how public resources are spent most efficient is increasing (Iversen, 2013). This makes it interesting to analyse how utilization could...... be increased during peak hours. DATA AND METHODOLOGYData is collected by observation of activities during two weeks on for example whether halls are used or not; the amount of playing field used; and number of participants (Iversen, 2012). Data on 1.331 activities in 36 sport halls across 4 municipalities have...

  3. The influence of profiled ceilings on sports hall acoustics : Ground effect predictions and scale model measurements

    NARCIS (Netherlands)

    Wattez, Y.C.M.; Tenpierik, M.J.; Nijs, L.

    2018-01-01

    Over the last few years, reverberation times and sound pressure levels have been measured in many sports halls. Most of these halls, for instance those made from stony materials, perform as predicted. However, sports halls constructed with profiled perforated steel roof panels have an unexpected

  4. Typology of Retractable Roof Structures in Stadiums and Sports Halls

    Directory of Open Access Journals (Sweden)

    Andrej Mahovič

    2015-10-01

    Full Text Available Retractable roof structures are one of the four fundamental systems (in addition to the playing area, stands and facade in a stadium and sports hall. The roof protects users against various weather conditions and creates optimum circumstances for carrying out different activities. Stadiums and sports halls with retractable roof structures can host a greater variety of activities, improve the quality of their implementation and the quality of visitors’ experience, and affect the perception and experience of people using or observing such buildings. A retractable roof structure allows for natural lighting and ventilation of the venue, gives optimal conditions for grass growth on the playing field, and reduces costs of use and maintenance of the building. Different typologies of movement of roof structures (frequency of opening and closing, design of the structure, and methods of movement are categorised in terms of their architectural and structural design. Application of different retractable roof systems worldwide is indicator of their effectiveness and efficiency, and is basis for use of movement also in other fundamental systems of stadiums and sports halls. Research and identification of characteristics of retractable roof structures lead to the design of new moving systems that can with the application of the moving principle change the purpose of movable elements or assume the characteristics of other fundamental systems.

  5. Energy cost models for air supported sports hall in cold climates considering energy efficiency

    OpenAIRE

    Nord, Natasa; Mathisen, Hans Martin; Cao, Guangyu

    2015-01-01

    The aim of the study was to develop models for energy planning for an air supported sports hall by analyzing different energy efficiency possibilities. This is a very specific building type suitable for sport activities in cold climates. The observed hall was operated when outdoor temperature was under 5 °C, while the most common measured indoor air temperature was 8 °C during the year. Neither indoor nor outdoor temperature influenced the overpressure. Based on the measurements, the specific...

  6. The supermodule insertion tool of the CMS electromagnetic calorimeter is leaving to the experimental hall located at P5.

    CERN Multimedia

    2006-01-01

    The supermodule insertion tool of the CMS electromagnetic calorimeter is leaving to the experimental hall located at P5. A successful test has been performed with a real supermodule, visible as a silver-coloured box on the last picture.

  7. Using Sustainable Materials in the Design of Sports Halls in Order to Improve the Quality of Sports Spaces

    Directory of Open Access Journals (Sweden)

    Hussein Hassani

    2017-01-01

    Full Text Available Abstract The establishment of any urban element in the location of the city follows certain rules and principles that in the case of observing the success and efficiency of that element will result in that specific location. Therefore, this study has been conducted with the aim to find out the most proper place among sports complexes in Urmia to redesign. In this regard, requirements and obligations of location finding were identified after studying international experiences and study the top regulations and documents, then, effective parameters were categorized in the two levels of main indices and options according to AHP. In following, information received from opinions of experts, managers and professionals were determined in determine the importance of the indexes and analysis and weights of indexes. Finally, Urmia two thousand seater sports hall was selected among other candidate places as the best place to redesign and also environmental problems are considered as an important situation in construction. Waste Management has activated the warning signs and alerts to the environment. Reuse, recycle and reduce the wastes is the only ways to recycle created wastes. However, these executive cases have more space for progress. In this study, we investigate the use of building materials in two-thousand seater sports hall of Young house of Urmia that emphasis is on the recyclable materials. Recycling as one of the strategies is to minimize wastes. And ultimately Sport Cultural of Young house has been redesigned from sustainable materials and suggestion was designed and presented with more details ranging from architectural maps and sections and the main structure of the stadium in three-dimensional.

  8. A Parametric Modelling Process for the Integration of Architecture and Structure in Large Multi-functional Sports Hall Design: a Case Study

    NARCIS (Netherlands)

    Pan, W.; Sun, Yimin; Turrin, M.; Paul, JC; Kawaguchi, K.; Ohsaki, M.; Takeuchi, T.

    2016-01-01

    The integration of architectural (functional spaces) and structural design is especially crucial for the conceptual design of large multi-functional sports halls, due to the strict regulations for functional spaces, the requirement of large-span structure, and the complex interrelationships between

  9. Steel Construction of Modern Building of Former Sports Hall at Chopin Street in Zielona Góra

    Science.gov (United States)

    Michalak, Bartosz

    2016-06-01

    Modernism in architecture of the lubuskie voivodeship is not dominating style. Objects created in the period of its greatest popularity are still fighting for recognition of their value as historical monuments. One of such facilities in Zielona Góra is building at Chopin street, where today is The Teacher Training Centre. However, originally object was intended to be a sports hall. The topic worth of further analysis is the construction of the building. The skeleton is a unique steel frame, made in 1930 by the famous pre-war company Fabrik und für Brückenbau Eisenkonstruktionen BEUCHELT & Co. Grünberg in Schlesien. In order to build walls the brick technology was used. It is a rarely seen combination that indicates the attempt to experiment with new solutions by engineers of the era of modernism.

  10. Steel Construction of Modern Building of Former Sports Hall at Chopin Street in Zielona Góra

    Directory of Open Access Journals (Sweden)

    Michalak Bartosz

    2016-06-01

    Full Text Available Modernism in architecture of the lubuskie voivodeship is not dominating style. Objects created in the period of its greatest popularity are still fighting for recognition of their value as historical monuments. One of such facilities in Zielona Góra is building at Chopin street, where today is The Teacher Training Centre. However, originally object was intended to be a sports hall. The topic worth of further analysis is the construction of the building. The skeleton is a unique steel frame, made in 1930 by the famous pre-war company Fabrik und für Brückenbau Eisenkonstruktionen BEUCHELT & Co. Grünberg in Schlesien. In order to build walls the brick technology was used. It is a rarely seen combination that indicates the attempt to experiment with new solutions by engineers of the era of modernism.

  11. Hall A

    Data.gov (United States)

    Federal Laboratory Consortium — The instrumentation in Hall A at the Thomas Jefferson National Accelerator Facility was designed to study electroand photo-induced reactions at very high luminosity...

  12. Hall C

    Data.gov (United States)

    Federal Laboratory Consortium — Hall C's initial complement of equipment (shown in the figure), includes two general-purpose magnetic spectrometers. The High Momentum Spectrometer (HMS) has a large...

  13. School sport and academic achievement.

    Science.gov (United States)

    Bradley, John; Keane, Francis; Crawford, Susan

    2013-01-01

    Physical Education and School Sport (PESS) is an integral part of the school curriculum in Ireland. Historically the "Healthy Body, Healthy Mind" philosophy has promoted the inclusion of PESS alongside more cognitive school subjects. Research suggests that PESS can promote cognitive function and provide educational benefits. However, there is little research on how the choice of school sport influences academic achievement. This study investigated how participation in school sport influences the Leaving Certificate points score in an Irish secondary school. In particular, the study will investigate how the particular sport chosen by students participating in school sport during their Leaving Certificate years influences their Leaving Certificate results. We recorded the Leaving Certificate scores and sports participation from 402 boys graduating from a secondary school in the Ireland during 2008-2011. Sports participation was assigned 1 of 4 categories: rugby, rowing, soccer, and no sport. Participation in sports during the Leaving Certificate years conferred a 25.4-point benefit to the final Leaving Certificate score. However, participation in rowing, the only individual sport available in the study, resulted in significantly higher Leaving Certificate scores than rugby, soccer and no sport (p benefit over the next highest group, rugby. Promoting participation in school sport and providing access to a range of team and individual sports throughout the secondary school years may be a beneficial way to improve students' Leaving Certificate results. © 2013, American School Health Association.

  14. Experimental halls workshop summary

    International Nuclear Information System (INIS)

    Thorndike, A.

    1976-01-01

    A brief discussion is given of: (1) pros and cons of open areas as compared with enclosed halls; (2) experimental hall needs of ep, anti p p, and other options; (3) hall for the lepton detector; and, (4) hall for the hadron spectrometer

  15. Indoorising the outdoors: Lifestyle sports revisited

    NARCIS (Netherlands)

    Salome, L.R.

    2012-01-01

    Since the early nineties, lifestyle sports such as surfing, snowboarding and skydiving are on a large scale offered in artificial sport environments. In snow domes, on artificial white water courses, in climbing halls and in wind tunnels, these alternative outdoor sports are accessible for a broad

  16. Paide Spordihall = Paide Sports Hall / Margit Mutso

    Index Scriptorium Estoniae

    Mutso, Margit, 1966-

    2010-01-01

    Paides Aiavilja 1 asuva spordihalli arhitektuursest lahendusest. Arhitektid: Maarja Kask, Karli Luik, Ralf Lõoke, kaasautor Jaan Port (Salto AB). Sisearhitekt Ville Lausmäe (VL Sisearhitektuur). Žürii liikme Kalle Komissarovi hinnang kultuurkapitali aastapreemiale esitatud hoonele

  17. Geography of a Sports Metropolis

    DEFF Research Database (Denmark)

    Feddersen, Arne; Ahlfeldt, Gabriel M.

    2010-01-01

    This study analyses the sports infrastructure of Hamburg, Germany, from the residents’ perspective. Empirical evidence is provided for the Sports Place Theory developed by BALE (2003) using a micro-level dataset of 1,319 sports facilities, which is merged with highly disaggregated data......, locations’ endowment of sports infrastructure is captured by potentiality variables, while accounting for natural and unnatural barriers. Given potential demand, central areas are found to be relatively underprovided with a sports infrastructure compared to peripheral areas where opportunity cost...... in the form of price of land is lower. The determinants of spatial distribution vary systematically across types of sports facilities. Publicly provided open sports fields and sport halls tend to be concentrated in areas of relatively low income which is in line with their social infrastructure character...

  18. Sports Physicals

    Science.gov (United States)

    ... Staying Safe Videos for Educators Search English Español Sports Physicals KidsHealth / For Teens / Sports Physicals What's in ... beginning of your sports season. What Is a Sports Physical? In the sports medicine field, the sports ...

  19. Skyrmions and Hall viscosity

    OpenAIRE

    Kim, Bom Soo

    2017-01-01

    We discuss the contribution of magnetic Skyrmions to the Hall viscosity and propose a simple way to identify it in experiments. The topological Skyrmion charge density has a distinct signature in the electric Hall conductivity that is identified in existing experimental data. In an electrically neutral system, the Skyrmion charge density is directly related to the thermal Hall conductivity. These results are direct consequences of the field theory Ward identities, which relate various physica...

  20. Quantum spin Hall phases

    International Nuclear Information System (INIS)

    Murakami, Shuichi

    2009-01-01

    We review our recent theoretical works on the quantum spin Hall effect. First we compare edge states in various 2D systems, and see whether they are robust or fragile against perturbations. Through the comparisons we see the robust nature of edge states in 2D quantum spin Hall phases. We see how it is protected by the Z 2 topological number, and reveal the nature of the Z 2 topological number by studying the phase transition between the quantum spin Hall and insulator phases. We also review our theoretical proposal of the ultrathin bismuth film as a candidate to the 2D quantum spin Hall system. (author)

  1. Facility Focus: Residence Halls.

    Science.gov (United States)

    College Planning & Management, 2003

    2003-01-01

    Describes four examples of residence hall design, one renovation and three new residence halls, that exemplify design principles that meet student and institutional requirements. The examples are at (1) the University of Illinois at Chicago; (2) Bowdoin College; (3) Muhlenberg College; and (4) Spring Arbor University. (SLD)

  2. Healthy Dining Hall Eating

    Science.gov (United States)

    ... Healthy Dining Hall Eating What's in this article? Good Intentions What Does Your Body Need? Choosing Carbs Choosing Veggies (and Fruit) Choosing Protein Choosing Dairy Snack Attacks Meeting Special Dietary Needs Portion Sizes Portion ...

  3. Halls Lake 1990

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Salt marsh habitats along the shoreline of Halls Lake are threatened by wave erosion, but the reconstruction of barrier islands to reduce this erosion will modify or...

  4. Sports Supplements

    Science.gov (United States)

    ... Staying Safe Videos for Educators Search English Español Sports Supplements KidsHealth / For Teens / Sports Supplements What's in ... really work? And are they safe? What Are Sports Supplements? Sports supplements (also called ergogenic aids ) are ...

  5. Guide to Eating for Sports

    Medline Plus

    Full Text Available ... can leave an athlete feeling anxious or jittery. Caffeine can also cause trouble sleeping. All of these can drag down a person's sports performance. Plus, taking certain medications — including supplements — can make ...

  6. Hall effect in hopping regime

    Energy Technology Data Exchange (ETDEWEB)

    Avdonin, A., E-mail: avdonin@ifpan.edu.pl [Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa (Poland); Skupiński, P. [Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa (Poland); Grasza, K. [Institute of Physics, Polish Academy of Sciences, Al. Lotników 32/46, 02-668 Warszawa (Poland); Institute of Electronic Materials Technology, ul. Wólczyńska 133, 01-919 Warszawa (Poland)

    2016-02-15

    A simple description of the Hall effect in the hopping regime of conductivity in semiconductors is presented. Expressions for the Hall coefficient and Hall mobility are derived by considering averaged equilibrium electron transport in a single triangle of localization sites in a magnetic field. Dependence of the Hall coefficient is analyzed in a wide range of temperature and magnetic field values. Our theoretical result is applied to our experimental data on temperature dependence of Hall effect and Hall mobility in ZnO. - Highlights: • Expressions for Hall coefficient and mobility for hopping conductivity are derived. • Theoretical result is compared with experimental curves measured on ZnO. • Simultaneous action of free and hopping conduction channels is considered. • Non-linearity of hopping Hall coefficient is predicted.

  7. Particulate matter and polycyclic aromatic hydrocarbons in a selected athletic hall: ambient concentrations, origin and effects on human health

    Science.gov (United States)

    Kuskowska, Karolina; Rogula-Kozłowska, Wioletta; Rogula-Kopiec, Patrycja

    2018-01-01

    The paper presents the results of research on the concentration of 16 polycyclic aromatic hydrocarbons (PAHs) associated with total suspended particles (TSP) and their respirable fraction (PM4) in one of the Warsaw sports halls. Samples of dust were collected for 15 days simultaneously inside and outside (atmospheric air) of the sports hall. The obtained data allowed calculating diagnostic ratios indicating the origin of the PAHs and selected indicators of cumulative exposure to the PAH mixture. Both PM and PAH in the surveyed area were derived from the combustion of solid fuels; this involved pollution both in the atmospheric air and in the air inside the sports hall. It has been shown that the exposure of sports hall users to PAHs is significantly higher than the exposure resulting from concentrations recorded in the atmospheric air.

  8. Particulate matter and polycyclic aromatic hydrocarbons in a selected athletic hall: ambient concentrations, origin and effects on human health

    Directory of Open Access Journals (Sweden)

    Kuskowska Karolina

    2018-01-01

    Full Text Available The paper presents the results of research on the concentration of 16 polycyclic aromatic hydrocarbons (PAHs associated with total suspended particles (TSP and their respirable fraction (PM4 in one of the Warsaw sports halls. Samples of dust were collected for 15 days simultaneously inside and outside (atmospheric air of the sports hall. The obtained data allowed calculating diagnostic ratios indicating the origin of the PAHs and selected indicators of cumulative exposure to the PAH mixture. Both PM and PAH in the surveyed area were derived from the combustion of solid fuels; this involved pollution both in the atmospheric air and in the air inside the sports hall. It has been shown that the exposure of sports hall users to PAHs is significantly higher than the exposure resulting from concentrations recorded in the atmospheric air.

  9. Hall Sweet Home

    Science.gov (United States)

    Oguntoyinbo, Lekan

    2011-01-01

    Many urban and commuter universities have their sights set on students who are unlikely to connect with the college and likely to fail unless the right strategies are put in place to help them graduate. In efforts to improve retention rates, commuter colleges are looking to an unusual suspect: residence halls. The author discusses how these…

  10. Spin Hall noise

    NARCIS (Netherlands)

    Kamra, A.; Witek, F.P.; Meyer, S.; Huebl, H.; Geprägs, S.; Gross, R.; Bauer, G.E.W.; Goennenwein, S.T.B.

    2014-01-01

    We measure the low-frequency thermal fluctuations of pure spin current in a platinum film deposited on yttrium iron garnet via the inverse spin Hall effect (ISHE)-mediated voltage noise as a function of the angle ? between the magnetization and the transport direction. The results are consistent

  11. Anomalous Hall effect

    Czech Academy of Sciences Publication Activity Database

    Nagaosa, N.; Sinova, Jairo; Onoda, S.; MacDonald, A. H.; Ong, N. P.

    2010-01-01

    Roč. 82, č. 2 (2010), s. 1539-1592 ISSN 0034-6861 Institutional research plan: CEZ:AV0Z10100521 Keywords : anomalous Hall effect * spintronics Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 51.695, year: 2010

  12. The Monty Hall Dilemma.

    Science.gov (United States)

    Granberg, Donald; Brown, Thad A.

    1995-01-01

    Examines people's behavior in the Monty Hall Dilemma (MHD), in which a person must make two decisions to win a prize. In a series of five studies, found that people misapprehend probabilities in the MHD. Discusses the MHD's relation to illusion of control, belief perseverance, and the status quo bias. (RJM)

  13. Sports physical

    Science.gov (United States)

    ... this page: //medlineplus.gov/ency/patientinstructions/000673.htm Sports physical To use the sharing features on this ... or routine checkups. Why do you Need a Sports Physical? The sports physical is done to: Find ...

  14. Team Sports

    Science.gov (United States)

    ... with Paralysis > Health > Staying active > Team sports Team sports ☷ ▾ Page contents Basketball Quad rugby Sled hockey Softball ... Basketball Basketball is probably the most well-developed sport for wheelchair users in the United States, for ...

  15. Sport tourism

    OpenAIRE

    Eva Schwartzhoffová

    2010-01-01

    Sport tourism is one specific type of travel and tourism. The goal of this article is to introduce the definition and importance of sport tourism to academic and sports professionals. At present, sport tourism is a diverse social, economic and cultural phenomenon arising from the unique interaction of activity, people and place. The second part of this article reports about sports events as an important part of sport tourism.

  16. Magnetometria por efeito Hall

    OpenAIRE

    Fernández Pinto, Janeth

    2010-01-01

    Construímos um magnetômetro utilizando dois sensores Hall de GaAs (Toshiba- THS118) operando em um modo diferencial. Cada sensor tem um circuito préamplificador associado a ele e a diferencia de voltagem entre eles é amplificada com um ganho variável de 30 - 7000. Os sensores Hall têm dimensões típicas de 1,5 x 1,7 x 0,6 mm3 e foram montados separados um do outro de 0,71 mm, em uma configuração espacial planar. O magnetômetro foi testado usando tanto correntes dc (Idc) quant...

  17. Paired Hall states

    International Nuclear Information System (INIS)

    Greiter, M.

    1992-01-01

    This dissertation contains a collection of individual articles on various topics. Their significance in the corresponding field as well as connections between them are emphasized in a general and comprehensive introduction. In the first article, the author explores the consequences for macroscopic effective Lagrangians of assuming that the momentum density is proportional to the flow of conserved current. The universal corrections obtained for the macroscopic Lagrangian of a superconductor describe the London Hall effect, and provide a fully consistent derivation of it. In the second article, a heuristic principle is proposed for quantized Hall states: the existence and incompressibility of fractionally quantized Hall states is explained by an argument based on an adiabatic localization of magnetic flux, the process of trading uniform flux for an equal amount of fictitious flux attached to the particles. This principle is exactly implemented in the third article. For a certain class of model Hamiltonians, the author obtains Laughlin's Jastrow type wave functions explicitly from a filled Landau level, by smooth extrapolation in quantum statistics. The generalization of this analysis to the torus geometry shows that theorems restricting the possibilities of quantum statistics on closed surfaces are circumvented in the presence of a magnetic field. In the last article, the existence is proposed of a novel incompressible quantum liquid, a paired Hall state, at a half filled Landau level. This state arises adiabatically from free fermions in zero magnetic field, and reduces to a state previously proposed by Halperin in the limit of tightly bound pairs. It supports unusual excitations, including neutral fermions and charge e/4 anyons with statistical parameter θ = π/8

  18. Planar Hall Effect MRAM

    OpenAIRE

    Bason, Y.; Klein, L.; Yau, J. -B.; Hong, X.; Hoffman, J.; Ahn, C. H.

    2005-01-01

    We suggest a new type of magnetic random access memory (MRAM) that is based on the phenomenon of the planar Hall effect (PHE) in magnetic films, and we demonstrate this idea with manganite films. The PHE-MRAM is structurally simpler than currently developed MRAM that is based on magnetoresistance tunnel junctions (MTJ), with the tunnel junction structure being replaced by a single layer film.

  19. Spin Hall effect devices

    Czech Academy of Sciences Publication Activity Database

    Jungwirth, Tomáš; Wunderlich, Joerg; Olejník, Kamil

    2012-01-01

    Roč. 11, č. 5 (2012), s. 382-390 ISSN 1476-1122 EU Projects: European Commission(XE) 268066 - 0MSPIN; European Commission(XE) 215368 - SemiSpinNet Grant - others:AV ČR(CZ) AP0801 Program:Akademická prémie - Praemium Academiae Institutional research plan: CEZ:AV0Z10100521 Keywords : spin Hall effect * spintronics * spin transistor Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 35.749, year: 2012

  20. Spin Hall effect

    Czech Academy of Sciences Publication Activity Database

    Sinova, Jairo; Valenzuela, O.V.; Wunderlich, Joerg; Back, C.H.; Jungwirth, Tomáš

    2015-01-01

    Roč. 87, č. 4 (2015), s. 1213-1259 ISSN 0034-6861 R&D Projects: GA MŠk(CZ) LM2011026; GA ČR GB14-37427G EU Projects: European Commission(XE) 268066 - 0MSPIN Institutional support: RVO:68378271 Keywords : spin Hall effect * spintronics Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 33.177, year: 2015

  1. Quantum critical Hall exponents

    CERN Document Server

    Lütken, C A

    2014-01-01

    We investigate a finite size "double scaling" hypothesis using data from an experiment on a quantum Hall system with short range disorder [1-3]. For Hall bars of width w at temperature T the scaling form is w(-mu)T(-kappa), where the critical exponent mu approximate to 0.23 we extract from the data is comparable to the multi-fractal exponent alpha(0) - 2 obtained from the Chalker-Coddington (CC) model [4]. We also use the data to find the approximate location (in the resistivity plane) of seven quantum critical points, all of which closely agree with the predictions derived long ago from the modular symmetry of a toroidal sigma-model with m matter fields [5]. The value nu(8) = 2.60513 ... of the localisation exponent obtained from the m = 8 model is in excellent agreement with the best available numerical value nu(num) = 2.607 +/- 0.004 derived from the CC-model [6]. Existing experimental data appear to favour the m = 9 model, suggesting that the quantum Hall system is not in the same universality class as th...

  2. SPORT MARKETING

    Directory of Open Access Journals (Sweden)

    Omer Špirtović

    2010-03-01

    Full Text Available Word „marketing“ comes from AngloSaxon linguistic domain and implies in a narrow sense the market. Under marketing, we consider certain process, which should create and solve relations of exchange between manufacturers on one side, and consumers on the other. Discussion about sport marketing implies its theoretical definition and generalization, and then its actual definition in sport environment. Sport marketing belongs to business function of sport organization and represents primaly an economical process of connecting produktion (sport organizations with sportsmen and coaches and consumption (sport and other public. Sport marketing is the reality in sport today, and cannot be observed as fashionabless of capitalistic production. Today is almost impossible for sport organization to make business without its business part called sport marketing if it wants to survive in sport arena.

  3. The Sport Imagery Questionnaire for Children (SIQ-C)

    Science.gov (United States)

    Hall, C. R.; Munroe-Chandler, K. J.; Fishburne, G. J.; Hall, N. D.

    2009-01-01

    Athletes of all ages report using imagery extensively to enhance their sport performance. The Sport Imagery Questionnaire (Hall, Mack, Paivio, & Hausenblas, 1998) was developed to assess cognitive and motivational imagery used by adult athletes. No such instrument currently exists to measure the use of imagery by young athletes. The aim of the…

  4. Botswana team sport players' perception of cohesion and imagery ...

    African Journals Online (AJOL)

    Perception of cohesion and imagery use among 45 elite team sport players in Botswana were assessed with the Group Environment Questionnaire (Carron et al., 1985) and the Sport Imagery Questionnaire (Hall et al., 1998) to determine whether a relationship exists between the variables, and whether imagery use will ...

  5. Quantum hall effect. A perspective

    International Nuclear Information System (INIS)

    Aoki, Hideo

    2006-01-01

    Novel concepts and phenomena are emerging recently in the physics of quantum Hall effect. This article gives an overview, which starts from the fractional quantum Hall system viewed as an extremely strongly correlated system, and move on to present various phenomena involving internal degrees of freedom (spin and layer), non-equilibrium and optical properties, and finally the spinoff to anomalous Hall effect and the rotating Bose-Einstein condensate. (author)

  6. Magnesium Hall Thruster

    Science.gov (United States)

    Szabo, James J.

    2015-01-01

    This Phase II project is developing a magnesium (Mg) Hall effect thruster system that would open the door for in situ resource utilization (ISRU)-based solar system exploration. Magnesium is light and easy to ionize. For a Mars- Earth transfer, the propellant mass savings with respect to a xenon Hall effect thruster (HET) system are enormous. Magnesium also can be combusted in a rocket with carbon dioxide (CO2) or water (H2O), enabling a multimode propulsion system with propellant sharing and ISRU. In the near term, CO2 and H2O would be collected in situ on Mars or the moon. In the far term, Mg itself would be collected from Martian and lunar regolith. In Phase I, an integrated, medium-power (1- to 3-kW) Mg HET system was developed and tested. Controlled, steady operation at constant voltage and power was demonstrated. Preliminary measurements indicate a specific impulse (Isp) greater than 4,000 s was achieved at a discharge potential of 400 V. The feasibility of delivering fluidized Mg powder to a medium- or high-power thruster also was demonstrated. Phase II of the project evaluated the performance of an integrated, highpower Mg Hall thruster system in a relevant space environment. Researchers improved the medium power thruster system and characterized it in detail. Researchers also designed and built a high-power (8- to 20-kW) Mg HET. A fluidized powder feed system supporting the high-power thruster was built and delivered to Busek Company, Inc.

  7. Sport Marketing

    OpenAIRE

    Ekmekci, Ridvan; Ekmekçi, Aytul Yeter

    2009-01-01

    Abstract  Marketing which is entered to almost our whole life, now more than goods and services, became an important  concept of ideas, persons, institutions, events, and facilities. As a main activities of business co. marketing has an important place in sports industry. Recently, the development of special sport marketing strategies and the presentation of sport goods and services to consumers are gaining importance. Efforts of increasing income of sport clubs, because of sport organization...

  8. Sport Toekomstverkenning

    OpenAIRE

    Marieke van Bakel; Ine Pulles; Annet Tiessen-Raaphorst; Frank den Hertog; Robert Vonk; Casper Schoemaker

    2017-01-01

    Deze publicatie verschijnt enkel digitaal op www.sporttoekomstverkenning.nl. Welke maatschappelijke veranderingen beïnvloeden de sport in Nederland? Waar gaat het heen met de sport tussen nu en 2040? Welke kansen, maar ook keuzes biedt dit voor de sportsector en het sportbeleid? Deze vragen staan centraal in deze toekomstverkenning over sport die werd uitgevoerd door het RIVM en het SCP, op verzoek van het ministerie van Volksgezondheid, Welzijn en Sport (VWS). In de Sport Toekomstverken...

  9. Spin Hall effect transistor

    Czech Academy of Sciences Publication Activity Database

    Wunderlich, Joerg; Park, B.G.; Irvine, A.C.; Zarbo, Liviu; Rozkotová, E.; Němec, P.; Novák, Vít; Sinova, Jairo; Jungwirth, Tomáš

    2010-01-01

    Roč. 330, č. 6012 (2010), s. 1801-1804 ISSN 0036-8075 R&D Projects: GA AV ČR KAN400100652; GA MŠk LC510 EU Projects: European Commission(XE) 215368 - SemiSpinNet Grant - others:AV ČR(CZ) AP0801 Program:Akademická prémie - Praemium Academiae Institutional research plan: CEZ:AV0Z10100521 Keywords : spin Hall effect * spintronics * spin transistor Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 31.364, year: 2010

  10. Sports Tourism

    Directory of Open Access Journals (Sweden)

    Gozalova Marina

    2014-07-01

    Full Text Available Introduction. This article is devoted to sports tourism. The purpose of this article is to examine theoretical material on sports tourism, to analyze sports tourism in Russia and to search for promising areas for the study of sports tourism in our country. Material and methods. In this part the authors develop the idea of the role of doing sports and keeping fit. For anyone who really wants to be healthy, fitness has become an integral part of their lives. Results. The purpose of this research is to study theoretical material on sports tourism, to analyze sports tourism in Russia and to search for promising areas for the study of sports tourism in our country. On the basis of their research the authors come to the conclusion that sports and tourism are interconnected. There are important factors affecting the situation of sports tourism in Russia. The paper examines sports tourism attractions in Russia. Conclusion. The authors conclude that there exists a high correlation dependence of foreign and domestic development of sports tourism on resources allocated for sports infrastructure. All in all, sports tourism tours draw visitors to their favorite sporting event, facility, or destination throughout the world.

  11. The ISOLDE hall

    CERN Multimedia

    Maximilien Brice

    2002-01-01

    Since 1992, after its move from the 600 MeV SC, ISOLDE is a customer of the Booster (then 1 GeV, now 1.4 GeV). The intense Booster beam (some 3E13 protons per pulse) is directed onto a target, from which a mixture of isotopes emanates. After ionization and electrostatic acceleration to 60 keV, they enter one of the 2 spectrometers (General Purpose Separator: GPS, and High Resolution Separator: HRS) from which the selected ions are directed to the experiments. The photos show: the REX-ISOLDE post accelerator; the mini-ball experiment; an overview of the ISOLDE hall. In the picture (_12) of the hall, the separators are behind the wall. From either of them, beams can be directed into any of the many beamlines towards the experiments, some of which are visible in the foreground. The elevated cubicle at the left is EBIS (Electron Beam Ion Source), which acts as a charge-state multiplier for the REX facility. The ions are further mass analzyzed and passed on to the linac which accelerates them to higher energies. T...

  12. SPORT FACILITIES - SPORT ACTIVITIES HARDWARE

    Directory of Open Access Journals (Sweden)

    Zoran Mašić

    2008-08-01

    Full Text Available Realisation of sport activities always demanded certain conditions. Among those, sports facilities are certainly necessary. Since there were important changes in the process of training itself and successful performance, as well as, the results achieved by the sportsmen; there is a need for adequate sports facilities, that include whole variety of systems,equipment and necessities. Nowadays, Sport facilities are not only “the place of event”, but also a condition/necessity in achieving best sport results. It is demanded that these facilities are comfortable, absolutely secure and that they can accommodate transmissions: an opening, the course of sports activities and the announcement of the winner. The kind of sport activity, age, sex; so the “sports level” of the competitors is emphasising the specific demands to wards sports facilities.

  13. Farm Hall: The Play

    Science.gov (United States)

    Cassidy, David C.

    2013-03-01

    It's July 1945. Germany is in defeat and the atomic bombs are on their way to Japan. Under the direction of Samuel Goudsmit, the Allies are holding some of the top German nuclear scientists-among them Heisenberg, Hahn, and Gerlach-captive in Farm Hall, an English country manor near Cambridge, England. As secret microphones record their conversations, the scientists are unaware of why they are being held or for how long. Thinking themselves far ahead of the Allies, how will they react to the news of the atomic bombs? How will these famous scientists explain to themselves and to the world their failure to achieve even a chain reaction? How will they come to terms with the horror of the Third Reich, their work for such a regime, and their behavior during that period? This one-act play is based upon the transcripts of their conversations as well as the author's historical work on the subject.

  14. Taking Leave?

    CERN Multimedia

    2000-01-01

    Planning a holiday? Then if you're a member of the personnel, you'll need to use the Laboratory's new leave system that will be put in place on 1 October. Leave allocations don't change - you are entitled to just as much holiday as before - but instead of being credited annually, your leave will be credited on a monthly basis, and this information will be communicated on your salary slip. The reason for the change is that with the various new leave schemes such as Recruitment by Saved Leave (RSL) and the Progressive Retirement Programme (PRP), a streamlined procedure was required for dealing with all kinds of leave. In the new system, each member of the personnel will have leave accounts to which leave will be credited monthly from the payroll and debited each time an absence is registered in the CERN Electronic Document Handling system (EDH). Leave balances will appear on monthly pay slips, and full details of leave transactions and balances will be available through EDH at all times. As the leave will be c...

  15. Sports Injuries

    Science.gov (United States)

    ... sometimes you can injure yourself when you play sports or exercise. Accidents, poor training practices, or improper ... can also lead to injuries. The most common sports injuries are Sprains and strains Knee injuries Swollen ...

  16. Sports Safety

    Science.gov (United States)

    Playing sports can be fun, but it can also be dangerous if you are not careful. You can help ... you are healthy before you start playing your sport Wearing the right shoes, gear, and equipment Drinking ...

  17. SPORT MARKETING

    OpenAIRE

    Omer Špirtović; Danilo Aćimović; Ahmet Međedović; Zoran Bogdanović

    2010-01-01

    Word „marketing“ comes from AngloSaxon linguistic domain and implies in a narrow sense the market. Under marketing, we consider certain process, which should create and solve relations of exchange between manufacturers on one side, and consumers on the other. Discussion about sport marketing implies its theoretical definition and generalization, and then its actual definition in sport environment. Sport marketing belongs to business function of sport organization and represents primaly an eco...

  18. oh sport

    Directory of Open Access Journals (Sweden)

    Elena Grigoryeva

    2017-03-01

    Sports play a very important and diverse role in the present-day global culture. On the occasion of the 105th anniversary of Coubertin’s Ode we would like to wish sports to return to the main words of the Ode and to correspond with them: “Oh sport, you are the peace”.

  19. Sport Biomechanist

    Science.gov (United States)

    Sullivan, Megan

    2005-01-01

    If you are an athlete or sports enthusiast, you know that every second counts. To find that 1-2% improvement that can make the difference between 1st and 5th place, sport biomechanists use science to investigate sports techniques and equipment, seeking ways to improve athlete performance and reduce injury risk. In essence, they want athletes to…

  20. Hall Effect Gyrators and Circulators

    Science.gov (United States)

    Viola, Giovanni; DiVincenzo, David P.

    2014-04-01

    The electronic circulator and its close relative the gyrator are invaluable tools for noise management and signal routing in the current generation of low-temperature microwave systems for the implementation of new quantum technologies. The current implementation of these devices using the Faraday effect is satisfactory but requires a bulky structure whose physical dimension is close to the microwave wavelength employed. The Hall effect is an alternative nonreciprocal effect that can also be used to produce desired device functionality. We review earlier efforts to use an Ohmically contacted four-terminal Hall bar, explaining why this approach leads to unacceptably high device loss. We find that capacitive coupling to such a Hall conductor has much greater promise for achieving good circulator and gyrator functionality. We formulate a classical Ohm-Hall analysis for calculating the properties of such a device, and show how this classical theory simplifies remarkably in the limiting case of the Hall angle approaching 90°. In this limit, we find that either a four-terminal or a three-terminal capacitive device can give excellent circulator behavior, with device dimensions far smaller than the ac wavelength. An experiment is proposed to achieve GHz-band gyration in millimeter (and smaller) scale structures employing either semiconductor heterostructure or graphene Hall conductors. An inductively coupled scheme for realizing a Hall gyrator is also analyzed.

  1. Hall Effect Gyrators and Circulators

    Directory of Open Access Journals (Sweden)

    Giovanni Viola

    2014-05-01

    Full Text Available The electronic circulator and its close relative the gyrator are invaluable tools for noise management and signal routing in the current generation of low-temperature microwave systems for the implementation of new quantum technologies. The current implementation of these devices using the Faraday effect is satisfactory but requires a bulky structure whose physical dimension is close to the microwave wavelength employed. The Hall effect is an alternative nonreciprocal effect that can also be used to produce desired device functionality. We review earlier efforts to use an Ohmically contacted four-terminal Hall bar, explaining why this approach leads to unacceptably high device loss. We find that capacitive coupling to such a Hall conductor has much greater promise for achieving good circulator and gyrator functionality. We formulate a classical Ohm-Hall analysis for calculating the properties of such a device, and show how this classical theory simplifies remarkably in the limiting case of the Hall angle approaching 90°. In this limit, we find that either a four-terminal or a three-terminal capacitive device can give excellent circulator behavior, with device dimensions far smaller than the ac wavelength. An experiment is proposed to achieve GHz-band gyration in millimeter (and smaller scale structures employing either semiconductor heterostructure or graphene Hall conductors. An inductively coupled scheme for realizing a Hall gyrator is also analyzed.

  2. Topological Hall and spin Hall effects in disordered skyrmionic textures

    KAUST Repository

    Ndiaye, Papa Birame

    2017-02-24

    We carry out a thorough study of the topological Hall and topological spin Hall effects in disordered skyrmionic systems: the dimensionless (spin) Hall angles are evaluated across the energy-band structure in the multiprobe Landauer-Büttiker formalism and their link to the effective magnetic field emerging from the real-space topology of the spin texture is highlighted. We discuss these results for an optimal skyrmion size and for various sizes of the sample and find that the adiabatic approximation still holds for large skyrmions as well as for nanoskyrmions. Finally, we test the robustness of the topological signals against disorder strength and show that the topological Hall effect is highly sensitive to momentum scattering.

  3. City and Town Halls; townHalls13

    Data.gov (United States)

    University of Rhode Island Geospatial Extension Program — Locations of city and town halls in Rhode Island. Derived using information originally compiled by the State of Rhode Island (http://www.ri.gov), and built upon...

  4. Anomalous Hall effect

    Science.gov (United States)

    Nagaosa, Naoto; Sinova, Jairo; Onoda, Shigeki; MacDonald, A. H.; Ong, N. P.

    2010-04-01

    The anomalous Hall effect (AHE) occurs in solids with broken time-reversal symmetry, typically in a ferromagnetic phase, as a consequence of spin-orbit coupling. Experimental and theoretical studies of the AHE are reviewed, focusing on recent developments that have provided a more complete framework for understanding this subtle phenomenon and have, in many instances, replaced controversy by clarity. Synergy between experimental and theoretical works, both playing a crucial role, has been at the heart of these advances. On the theoretical front, the adoption of the Berry-phase concepts has established a link between the AHE and the topological nature of the Hall currents. On the experimental front, new experimental studies of the AHE in transition metals, transition-metal oxides, spinels, pyrochlores, and metallic dilute magnetic semiconductors have established systematic trends. These two developments, in concert with first-principles electronic structure calculations, strongly favor the dominance of an intrinsic Berry-phase-related AHE mechanism in metallic ferromagnets with moderate conductivity. The intrinsic AHE can be expressed in terms of the Berry-phase curvatures and it is therefore an intrinsic quantum-mechanical property of a perfect crystal. An extrinsic mechanism, skew scattering from disorder, tends to dominate the AHE in highly conductive ferromagnets. The full modern semiclassical treatment of the AHE is reviewed which incorporates an anomalous contribution to wave-packet group velocity due to momentum-space Berry curvatures and correctly combines the roles of intrinsic and extrinsic (skew-scattering and side-jump) scattering-related mechanisms. In addition, more rigorous quantum-mechanical treatments based on the Kubo and Keldysh formalisms are reviewed, taking into account multiband effects, and demonstrate the equivalence of all three linear response theories in the metallic regime. Building on results from recent experiment and theory, a

  5. Gauge invariance and fractional quantized Hall effect

    International Nuclear Information System (INIS)

    Tao, R.; Wu, Y.S.

    1984-01-01

    It is shown that gauge invariance arguments imply the possibility of fractional quantized Hall effect; the Hall conductance is accurately quantized to a rational value. The ground state of a system showing the fractional quantized Hall effect must be degenerate; the non-degenerate ground state can only produce the integral quantized Hall effect. 12 references

  6. A game generalizing Hall's theorem

    OpenAIRE

    Rabern, Landon

    2012-01-01

    We characterize the initial positions from which the first player has a winning strategy in a certain two-player game. This provides a generalization of Hall's theorem. Vizing's edge coloring theorem follows from a special case.

  7. Shared Magnetics Hall Thruster Project

    Data.gov (United States)

    National Aeronautics and Space Administration — In the proposed Phase II program, Busek Co. will demonstrate an innovative methodology for clustering Hall thrusters into a high performance, very high power...

  8. Shared Magnetics Hall Thruster Project

    Data.gov (United States)

    National Aeronautics and Space Administration — In the proposed Phase I program, Busek Co. will demonstrate an innovative methodology for clustering Hall thrusters into a high performance, very high power...

  9. "Hall mees" Linnateatris / Triin Sinissaar

    Index Scriptorium Estoniae

    Sinissaar, Triin

    1999-01-01

    Tallinn Linnateatri ja Raadioteatri ühislavastus "Hall mees" Gill Adamsi näidendi järgi, lavastaja Eero Spriit, osades Helene Vannari ja Väino Laes, kunstnik Kustav - Agu Püüman. Esietendus 22. okt

  10. Sheldon-Hall syndrome

    Directory of Open Access Journals (Sweden)

    Bamshad Michael J

    2009-03-01

    Full Text Available Abstract Sheldon-Hall syndrome (SHS is a rare multiple congenital contracture syndrome characterized by contractures of the distal joints of the limbs, triangular face, downslanting palpebral fissures, small mouth, and high arched palate. Epidemiological data for the prevalence of SHS are not available, but less than 100 cases have been reported in the literature. Other common clinical features of SHS include prominent nasolabial folds, high arched palate, attached earlobes, mild cervical webbing, short stature, severe camptodactyly, ulnar deviation, and vertical talus and/or talipes equinovarus. Typically, the contractures are most severe at birth and non-progressive. SHS is inherited in an autosomal dominant pattern but about half the cases are sporadic. Mutations in either MYH3, TNNI2, or TNNT3 have been found in about 50% of cases. These genes encode proteins of the contractile apparatus of fast twitch skeletal muscle fibers. The diagnosis of SHS is based on clinical criteria. Mutation analysis is useful to distinguish SHS from arthrogryposis syndromes with similar features (e.g. distal arthrogryposis 1 and Freeman-Sheldon syndrome. Prenatal diagnosis by ultrasonography is feasible at 18–24 weeks of gestation. If the family history is positive and the mutation is known in the family, prenatal molecular genetic diagnosis is possible. There is no specific therapy for SHS. However, patients benefit from early intervention with occupational and physical therapy, serial casting, and/or surgery. Life expectancy and cognitive abilities are normal.

  11. Theory of spin Hall effect

    OpenAIRE

    Chudnovsky, Eugene M.

    2007-01-01

    An extension of Drude model is proposed that accounts for spin and spin-orbit interaction of charge carriers. Spin currents appear due to combined action of the external electric field, crystal field and scattering of charge carriers. The expression for spin Hall conductivity is derived for metals and semiconductors that is independent of the scattering mechanism. In cubic metals, spin Hall conductivity $\\sigma_s$ and charge conductivity $\\sigma_c$ are related through $\\sigma_s = [2 \\pi \\hbar...

  12. Transport Signatures of the Hall Viscosity.

    Science.gov (United States)

    Delacrétaz, Luca V; Gromov, Andrey

    2017-12-01

    Hall viscosity is a nondissipative response function describing momentum transport in two-dimensional systems with broken parity. It is quantized in the quantum Hall regime, and contains information about the topological order of the quantum Hall state. Hall viscosity can distinguish different quantum Hall states with identical Hall conductances, but different topological order. To date, an experimentally accessible signature of Hall viscosity is lacking. We exploit the fact that Hall viscosity contributes to charge transport at finite wavelengths, and can therefore be extracted from nonlocal resistance measurements in inhomogeneous charge flows. We explain how to determine the Hall viscosity from such a transport experiment. In particular, we show that the profile of the electrochemical potential close to contacts where current is injected is sensitive to the value of the Hall viscosity.

  13. Not your grandfather's concert hall

    Science.gov (United States)

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

    2004-05-01

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

  14. AMERICAN SPORT AND THE SPORTS HEROES OF THE ROARING TWENTIES

    Directory of Open Access Journals (Sweden)

    Michał Mazurkiewicz

    2014-04-01

    Full Text Available The aim of the article is to show the role of sport in American society against the background of a very important—for many reasons—period of great social transformation in the United States, one which visibly gathered pace in the 1920s. The author presents different aspects of popular culture, which was in full bloom on account of the following factors: the joy after World War I, a sense of optimism, the development of the economy and industry, the growth of big cities, and the greater affluence of the citizens. The analysis of that unusual decade corroborates the role of sport and its great power of influence on society. In an age when technology and mass production had robbed experiences and objects of their uniqueness, sports provided some of the unpredictability and drama that people craved when looking for romance and adventure. The reasons for the popularity of sport in the USA are presented, as well as the major sports diciplines and heroes of American sport who, in a time when mass production seemed to be making individuals less significant, met with a favorable response—people clung to the heroic personalities of sports figures. The analysis of the beginnings of professionalism in sport, the beginnings of organized support, and sports broadcasting, leaves no doubt as to the significance of the period. As the article demonstrates, it was a time of rapid and profound transformation in the realm of sport. Every serious examination of phenomena in contemporary American sport—and this is also true in the case of other countries—without a knowledge of the specificity of sport in the 1920s, would be far from perfect.

  15. Iodine Hall Thruster

    Science.gov (United States)

    Szabo, James

    2015-01-01

    Iodine enables dramatic mass and cost savings for lunar and Mars cargo missions, including Earth escape and near-Earth space maneuvers. The demonstrated throttling ability of iodine is important for a singular thruster that might be called upon to propel a spacecraft from Earth to Mars or Venus. The ability to throttle efficiently is even more important for missions beyond Mars. In the Phase I project, Busek Company, Inc., tested an existing Hall thruster, the BHT-8000, on iodine propellant. The thruster was fed by a high-flow iodine feed system and supported by an existing Busek hollow cathode flowing xenon gas. The Phase I propellant feed system was evolved from a previously demonstrated laboratory feed system. Throttling of the thruster between 2 and 11 kW at 200 to 600 V was demonstrated. Testing showed that the efficiency of iodine fueled BHT-8000 is the same as with xenon, with iodine delivering a slightly higher thrust-to-power (T/P) ratio. In Phase II, a complete iodine-fueled system was developed, including the thruster, hollow cathode, and iodine propellant feed system. The nominal power of the Phase II system is 8 kW; however, it can be deeply throttled as well as clustered to much higher power levels. The technology also can be scaled to greater than 100 kW per thruster to support megawatt-class missions. The target thruster efficiency for the full-scale system is 65 percent at high specific impulse (Isp) (approximately 3,000 s) and 60 percent at high thrust (Isp approximately 2,000 s).

  16. Sports Digitalization

    DEFF Research Database (Denmark)

    Xiao, Xiao; Hedman, Jonas; Tan, Felix Ter Chian

    2017-01-01

    evolution, as digital technologies are increasingly entrenched in a wide range of sporting activities and for applications beyond mere performance enhancement. Despite such trends, research on sports digitalization in the IS discipline is surprisingly still nascent. This paper aims at establishing......Ever since its first manifesto in Greece around 3000 years ago, sports as a field has accumulated a long history with strong traditions while at the same time, gone through tremendous changes toward professionalization and commercialization. The current waves of digitalization have intensified its...... a discourse on sports digitalization within the discipline. Toward this, we first provide an understanding of the institutional characteristics of the sports industry, establishing its theoretical importance and relevance in our discipline; second, we reveal the latest trends of digitalization in the sports...

  17. Reliability-Based Robustness Analysis for a Croatian Sports Hall

    DEFF Research Database (Denmark)

    Čizmar, Dean; Kirkegaard, Poul Henning; Sørensen, John Dalsgaard

    2011-01-01

    This paper presents a probabilistic approach for structural robustness assessment for a timber structure built a few years ago. The robustness analysis is based on a structural reliability based framework for robustness and a simplified mechanical system modelling of a timber truss system...... is expressed and evaluated by a robustness index. Next, the robustness is assessed using system reliability indices where the probabilistic failure model is modelled by a series system of parallel systems....

  18. Sport Management.

    Science.gov (United States)

    Parkhouse, Bonnie L., Ed.; And Others

    1984-01-01

    Traditional teaching and coaching positions have become scarce but the expanding field of sport management has created its own job market, demanding new skills and preparation. Three articles are offered that explore different aspects and possibilities for a sport management career. (DF)

  19. Sports Nutrition.

    Science.gov (United States)

    Missouri State Dept. of Health, Jefferson City.

    This guide deals with various aspects of sports and nutrition. Twelve chapters are included: (1) "Sports and Nutrition"; (2) "Eat to Compete"; (3) "Fit Folks Need Fit Food"; (4) "The Food Guide Pyramid"; (5) "Fat Finder's Guide"; (6) "Pre- and Post-Event Meals"; (7) "Tips for the…

  20. Sport Toekomstverkenning

    NARCIS (Netherlands)

    Marieke van Bakel; Ine Pulles; Annet Tiessen-Raaphorst; Frank den Hertog; Robert Vonk; Casper Schoemaker

    2017-01-01

    Deze publicatie verschijnt enkel digitaal op www.sporttoekomstverkenning.nl. Welke maatschappelijke veranderingen beïnvloeden de sport in Nederland? Waar gaat het heen met de sport tussen nu en 2040? Welke kansen, maar ook keuzes biedt dit voor de sportsector en het sportbeleid? Deze vragen

  1. ac spin-Hall effect

    International Nuclear Information System (INIS)

    Entin-Wohlman, O.

    2005-01-01

    Full Text:The spin-Hall effect is described. The Rashba and Dresselhaus spin-orbit interactions are both shown to yield the low temperature spin-Hall effect for strongly localized electrons coupled to phonons. A frequency-dependent electric field E(ω) generates a spin-polarization current, normal to E, due to interference of hopping paths. At zero temperature the corresponding spin-Hall conductivity is real and is proportional to ω 2 . At non-zero temperatures the coupling to the phonons yields an imaginary term proportional to ω. The interference also yields persistent spin currents at thermal equilibrium, at E = 0. The contributions from the Dresselhaus and Rashba interactions to the interference oppose each other

  2. Novel concepts in Hall sensors

    Science.gov (United States)

    Mani, R. G.

    1996-03-01

    Hall effect devices are widely used as position sensors and contactless switches in applications ranging from electric motors to soft drink machines and automobiles. Such devices typically operate in an adverse environment where offset voltages originating from various physical effects limit the effective sensitivity of the sensor to the weak magnetic field (B device that automatically reduces such spurious offsets is desirable because improved 'signal to offset' would relax manufacturing tolerances and other constraints within the sensor system. Here, we examine some techniques and sensor configurations (R. G. Mani, K. von Klitzing, F. Jost, K. Marx, S. Lindenkreuz, and H. P. Trah, Appl. Phys. Lett. 67, 2223, 1995.) based on the so called 'anti Hall bar' geometry that promise the possibility of a Silicon based Hall sensor with a field equivalent offset well below 1 mT.

  3. Teaching Sport as History, History through Sport

    Science.gov (United States)

    Wheeler, Robert F.

    1978-01-01

    Describes an undergraduate history course based on two themes: sport as a reflection of society and sport as a socializing agent affecting society. The course focuses on sports and industrialization, traditional and modern sports, political and economic aspects of sport, and inequality and discrimination in sports. (Author/JK)

  4. Computational Modeling of Hall Thruster Erosion

    Data.gov (United States)

    National Aeronautics and Space Administration — Hall thrusters are being developed by NASA, DOD, and industry to meet a variety of on-board space propulsion needs. Hall thrusters have been operated successfully...

  5. ATLAS Assembly Hall Open Day

    CERN Multimedia

    Patrice Loiez

    2004-01-01

    To mark the 50th Anniversary of the founding of CERN, a day of tours, displays and presentations was held in October 2004. The assembly halls for the experiments that were waiting to be installed on the LHC, such as ATLAS shown here, were transformed into display areas and cafés.

  6. The Other Hall Effect: College Board Physics

    Science.gov (United States)

    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…

  7. Sport Psychology.

    Science.gov (United States)

    Krotee, March L.

    1980-01-01

    Sport psychology is defined in terms of human behavior in athletic situations. The psychosocial cross-cultural setting provides a model for studying trait and state psychosocial attributes and suggests issues and concerns for further study. (JMF)

  8. [Sports purpura].

    Science.gov (United States)

    Kluger, Nicolas

    2012-10-01

    Recreational or regular physical and sport activities may be responsible for a wide range of cutaneous complications. Among them, "sports purpura" is a peculiar symptom that can occur during a large number of sports. "Effort purpura" defines any purpura occurring within the context of physical exercise irrespective of its cause. Therefore this clinical diagnosis includes various aetiologies. Diagnosis of traumatic purpura is often easy if the sport is mentioned in the anamnesis; cutaneous exercise - induced vasculitis must be also noted. Purpura can reveal systemic diseases or internal haemorrhage, such as spleen rupture, thrombopathies or systemic vasculitis, and other effort purpuras must be taken into account, including those related to the environment (cold, sun exposure...). Knowledge of a physical activity before the occurrence of purpura should be known by practitioner to avoid unnecessary and costly explorations in most of the cases. Copyright © 2012 Elsevier Masson SAS. All rights reserved.

  9. Sport Technology

    CSIR Research Space (South Africa)

    Kirkbride, T

    2007-11-01

    Full Text Available Technology is transforming the games themselves and at times with dire consequences. Tony Kirkbride, Head: CSIR Technology Centre said there are a variety of sports technologies and there have been advances in material sciences and advances...

  10. Loophole ethics in sports

    Directory of Open Access Journals (Sweden)

    Øyvind Kvalnes

    2010-01-01

    Full Text Available Ethical challenges in sports occur when the practitioners are caught between the will to win and the overall task of staying within the realm of acceptable values and virtues. One way to prepare for these challenges is to formulate comprehensive and specific rules of acceptable conduct. In this paper we will draw attention to one serious problem with such a rule-based approach. It may inadvertently encourage what we will call loophole ethics, an attitude where every action that is not explicitly defined as wrong, will be seen as a viable option. Detailed codes of conduct leave little room for personal judgement, and instead promote a loophole mentality. We argue that loophole ethics can be avoided by operating with only a limited set of general principles, thus leaving more space for personal judgement and wisdom.http://dx.doi.org/10.5324/eip.v4i1.1740

  11. Rapportage sport 2008

    NARCIS (Netherlands)

    Koen Breedveld; Carlijn Kamphuis; Annet Tiessen-Raaphorst

    2008-01-01

    Sport boeit. Sport bindt. Sport bevordert de gezondheid. En sport betaalt. Sport is anno 2008 ongekend populair. Tweederde van de Nederlanders doet aan sport. Na zwemmen en fietsen is fitness de meest populaire sport geworden. Daarnaast zetten anderhalf miljoen Nederlanders zich als vrijwilliger

  12. Sports Accidents

    CERN Document Server

    Kiebel

    1972-01-01

    Le Docteur Kiebel, chirurgien à Genève, est aussi un grand ami de sport et de temps en temps médecin des classes genevoises de ski et également médecin de l'équipe de hockey sur glace de Genève Servette. Il est bien qualifié pour nous parler d'accidents de sport et surtout d'accidents de ski.

  13. An Audit of the Egress System in Multi-Storey Annexes of Four Halls ...

    African Journals Online (AJOL)

    A principal consideration in this case is the provision of an effective egress system that could be located at appropriate places to aid people to safety. The absence of these measures in multi-storey blocks leaves occupants at greater risk. This paper presents results of a study carried out in students' Halls of Residence at the ...

  14. Social Cultural Factors Influencing Women's Participation in Sports ...

    African Journals Online (AJOL)

    This study investigated the socio-cultural factors influencing women's participation in sports as perceived by female undergraduates in the University of Ilorin. Two hundred female undergraduate students residing in school halls of residence were involved in the study. These were selected using simple randomsampling.

  15. Scanning vector Hall probe microscope

    Czech Academy of Sciences Publication Activity Database

    Fedor, J.; Cambel, V.; Gregušová, D.; Hanzelka, Pavel; Dérer, J.; Volko, J.

    2003-01-01

    Roč. 74, č. 12 (2003), s. 5105 - 5110 ISSN 0034-6748 Institutional research plan: CEZ:AV0Z2065902 Keywords : VHPM * Hall sensor * Helium cryostat Subject RIV: JB - Sensors, Measurment, Regulation Impact factor: 1.343, year: 2003 http://web. ebscohost .com/ehost/pdf?vid=8&hid=115&sid=a7c0555a-21f4-4932-b1c6-a308ac4dd50b%40sessionmgr2

  16. Facial Sports Injuries

    Science.gov (United States)

    ... Marketplace Find an ENT Doctor Near You Facial Sports Injuries Facial Sports Injuries Patient Health Information News ... should receive immediate medical attention. Prevention Of Facial Sports Injuries The best way to treat facial sports ...

  17. Tunneling Anomalous and Spin Hall Effects.

    Science.gov (United States)

    Matos-Abiague, A; Fabian, J

    2015-07-31

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

  18. Spin Hall effect by surface roughness

    KAUST Repository

    Zhou, Lingjun

    2015-01-08

    The spin Hall and its inverse effects, driven by the spin orbit interaction, provide an interconversion mechanism between spin and charge currents. Since the spin Hall effect generates and manipulates spin current electrically, to achieve a large effect is becoming an important topic in both academia and industries. So far, materials with heavy elements carrying a strong spin orbit interaction, provide the only option. We propose here a new mechanism, using the surface roughness in ultrathin films, to enhance the spin Hall effect without heavy elements. Our analysis based on Cu and Al thin films suggests that surface roughness is capable of driving a spin Hall angle that is comparable to that in bulk Au. We also demonstrate that the spin Hall effect induced by surface roughness subscribes only to the side-jump contribution but not the skew scattering. The paradigm proposed in this paper provides the second, not if only, alternative to generate a sizable spin Hall effect.

  19. Sports Marketing.

    Science.gov (United States)

    Ohio State Dept. of Education, Columbus. Div. of Career-Technical and Adult Education.

    This document presents the Ohio Integrated Technical and Academic Competency profile for sports marketing. The profile is to serve as the basis for curriculum development in Ohio's secondary, adult, and postsecondary programs. The profile includes a comprehensive listing of 999 specialty key indicators for evaluating mastery of 113 competencies in…

  20. Racquet Sports.

    Science.gov (United States)

    Zebas, Carole J., Ed.; Groppel, Jack L., Ed.

    1983-01-01

    In six articles on racquet sports, the origins of the games are traced, methods for teaching skills such as footwork, racquetball strategy, and badminton techniques are discussed, and the biomechanics of the one- and two-handed backhand in tennis are reviewed. Information about paddle tennis is included. (PP)

  1. Sports Ballistics

    Science.gov (United States)

    Clanet, Christophe

    2015-01-01

    This review describes and classifies the trajectories of sports projectiles that have spherical symmetry, cylindrical symmetry, or (almost) no symmetry. This classification allows us to discuss the large diversity observed in the paths of spherical balls, the flip properties of shuttlecocks, and the optimal position and stability of ski jumpers.

  2. Interfacing Sport

    DEFF Research Database (Denmark)

    Andersen, Tem Frank

    This study tries to map out the possible interplay between interactive digital media (including mobile and wearable technologies) and sport as performance and participation. The ambition is to create a model providing the analytical framework for understanding questions like "are we running...

  3. Sports Fitness

    Science.gov (United States)

    ... motivator. Physically, you need strength and endurance. Your training will vary with your sport. You would not train the same way for pole vaulting as for swimming. You might, however, cross train. Cross training simply means that you include a variety of ...

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

    Energy Technology Data Exchange (ETDEWEB)

    Feng, Yang; Feng, Xiao; Ou, Yunbo; Wang, Jing; Liu, Chang; Zhang, Liguo; Zhao, Dongyang; Jiang, Gaoyuan; Zhang, Shou-Cheng; He, Ke; Ma, Xucun; Xue, Qi-Kun; Wang, Yayu

    2015-09-16

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

  5. Planar Hall effect bridge magnetic field sensors

    DEFF Research Database (Denmark)

    Henriksen, A.D.; Dalslet, Bjarke Thomas; Skieller, D.H.

    2010-01-01

    Until now, the planar Hall effect has been studied in samples with cross-shaped Hall geometry. We demonstrate theoretically and experimentally that the planar Hall effect can be observed for an exchange-biased ferromagnetic material in a Wheatstone bridge topology and that the sensor signal can...... be significantly enhanced by a geometric factor. For the samples in the present study, we demonstrate an enhancement of the sensor output by a factor of about 100 compared to cross-shaped sensors. The presented construction opens a new design and application area of the planar Hall effect, which we term planar...

  6. Listening to the acoustics in concert halls

    Science.gov (United States)

    Beranek, Leo L.; Griesinger, David

    2004-05-01

    How does acoustics affect the symphonic music performed in a concert hall? The lecture begins with an illustrated discussion of the architectural features that influence the acoustics. Boston Symphony Hall, which was built in 1900 when only one facet of architectural design was known, now rates as one of the world's great halls. How this occurred will be presented. Music is composed with some acoustical environment in mind and this varies with time from the Baroque to the Romantic to the Modern musical period. Conductors vary their interpretation according to the hall they are in. Well-traveled listeners and music critics have favorite halls. The lecture then presents a list of 58 halls rank ordered according to their acoustical quality based on interviews of music critics and conductors. Modern acoustical measurements made in these halls are compared with their rankings. Music recordings will be presented that demonstrate how halls sound that have different measured acoustical parameters. Photographs of a number of recently built halls are shown as examples of how these known acoustical factors have been incorporated into architectural design.

  7. Anomalous Hall effect in polycrystalline Ni films

    KAUST Repository

    Guo, Zaibing

    2012-02-01

    We systematically studied the anomalous Hall effect in a series of polycrystalline Ni films with thickness ranging from 4 to 200 nm. It is found that both the longitudinal and anomalous Hall resistivity increased greatly as film thickness decreased. This enhancement should be related to the surface scattering. In the ultrathin films (46 nm thick), weak localization corrections to anomalous Hall conductivity were studied. The granular model, taking into account the dominated intergranular tunneling, has been employed to explain this phenomenon, which can explain the weak dependence of anomalous Hall resistivity on longitudinal resistivity as well. © 2011 Elsevier Ltd. All rights reserved.

  8. Hall-effect arc protector

    Science.gov (United States)

    Rankin, R.A.; Kotter, D.K.

    1997-05-13

    The Hall-Effect Arc Protector is used to protect sensitive electronics from high energy arcs. The apparatus detects arcs by monitoring an electrical conductor, of the instrument, for changes in the electromagnetic field surrounding the conductor which would be indicative of a possible arcing condition. When the magnitude of the monitored electromagnetic field exceeds a predetermined threshold, the potential for an instrument damaging are exists and the control system logic activates a high speed circuit breaker. The activation of the breaker shunts the energy imparted to the input signal through a dummy load to the ground. After the arc condition is terminated, the normal signal path is restored. 2 figs.

  9. Temperature Gradient in Hall Thrusters

    International Nuclear Information System (INIS)

    Staack, D.; Raitses, Y.; Fisch, N.J.

    2003-01-01

    Plasma potentials and electron temperatures were deduced from emissive and cold floating probe measurements in a 2 kW Hall thruster, operated in the discharge voltage range of 200-400 V. An almost linear dependence of the electron temperature on the plasma potential was observed in the acceleration region of the thruster both inside and outside the thruster. This result calls into question whether secondary electron emission from the ceramic channel walls plays a significant role in electron energy balance. The proportionality factor between the axial electron temperature gradient and the electric field is significantly smaller than might be expected by models employing Ohmic heating of electrons

  10. Library rooms or Library halls

    Directory of Open Access Journals (Sweden)

    Alfredo Serrai

    2013-12-01

    Full Text Available Library Halls, understood as Renaissance and Baroque architectural creations, along with the furnishings and decorations, accomplish a cognitive task and serve to transmit knowledge. The design of these spaces based on the idea that they should reflect the merits and content of the collections housed within them, in order to prepare the mind of the reader to respect and admire the volumes. In accordance with this principle, in the fifteenth century library rooms had a basilican shape, with two or three naves, like churches, reflecting thus the spiritual value of the books contained there. Next to that inspiring function, library rooms had also the task of representing the entire logical and conceptual universe of human knowledge in a figurative way, including for this purpose also the and Kunst- und Wunderkammern, namely the collections of natural, artficial objects, and works of art. The importance of library rooms and their function was understood already in the early decades of the seventeenth century, as underlined in the treatise, Musei sive Bibliothecae tam privatae quam publicae Extructio, Instructio, Cura, Usus, written by the Jesuit Claude Clément and published in 1635. Almost the entire volume is dedicated to the decoration and ornamentation of the Saloni, and the function of the library is identified exclusively with the preservation and decoration of the collection, neglecting more specifically bibliographic aspects or those connected to library science. The architectural structure of the Saloni was destined to change in relation to two factors, namely the form of books, and the sources of light. As a consequence, from the end of the sixteenth century – or perhaps even before if one considers the fragments of the Library of Urbino belonging to Federico da Montefeltro – shelves and cabinets have been placed no longer in the center of the room, but were set against the walls. This new disposition of the furniture, surmounted by

  11. Invitational Engineering in the Residence Halls.

    Science.gov (United States)

    Murphy, Jack; Purkey, William

    1981-01-01

    Presents various ways in which a residence hall environment may be specifically engineered to encourage individual participation in the process of education. Invitational engineering is defined as one way to transpose psychological principles to residence halls so they contribute to the developmental life of students. (RC)

  12. Quantum Hall effect in quantum electrodynamics

    International Nuclear Information System (INIS)

    Penin, Alexander A.

    2009-01-01

    We consider the quantum Hall effect in quantum electrodynamics and find a deviation from the quantum-mechanical prediction for the Hall conductivity due to radiative antiscreening of electric charge in an external magnetic field. A weak dependence of the universal von Klitzing constant on the magnetic field strength, which can possibly be observed in a dedicated experiment, is predicted

  13. Reversal of the Hall field in indium

    International Nuclear Information System (INIS)

    Ozimek, E.J.; Leisure, R.G.; Hsu, D.K.

    1978-01-01

    The Hall effect in single crystal has been investigated at 63 kOe over the 6-280 K temperature range. The Hall coefficient reverses sign as a function of temperature. The high temperature value is less negative than theoretical predictions. (Auth.)

  14. Integral and fractional quantum Hall Ising ferromagnets

    Czech Academy of Sciences Publication Activity Database

    Výborný, Karel; Čertík, Ondřej; Pfannkuche, D.; Wodzinski, D.; Wójs, A.; Quinn, J.J.

    2007-01-01

    Roč. 75, č. 4 (2007), 045434/1-045434/10 ISSN 1098-0121 R&D Projects: GA MŠk LC510 Institutional research plan: CEZ:AV0Z10100521 Keywords : quantum Hall ferromagnet * fractional quantum Hall effect ( FQHE) * Ising ferromagnet * exact diagonalization Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 3.172, year: 2007

  15. 20th Annual Residence Hall Construction Report

    Science.gov (United States)

    Agron, Joe

    2009-01-01

    Even in difficult economic times, colleges and universities continue to invest in residence hall construction projects as a way to attract new students and keep existing ones on campus. According to data from "American School & University"'s 20th annual Residence Hall Construction Report, the median new project completed in 2008 was…

  16. Mesoscopic effects in the quantum Hall regime

    Indian Academy of Sciences (India)

    Home; Journals; Pramana – Journal of Physics; Volume 58; Issue 2 ... Mesoscopic effects; quantum Hall transitions; finite-size scaling. ... When band mixing between multiple Landau levels is present, mesoscopic effects cause a crossover from a sequence of quantum Hall transitions for weak disorder to classical behavior ...

  17. The Scientific Humanism of G. Stanley Hall

    Science.gov (United States)

    Meyer, Donald H.

    1971-01-01

    This paper presents the humanistic psychology of the pioneer American psychologist Granville Stanley Hall (1844-1924), examining Hall's effort to develop a system of psychology that is at once rigorously scientific and, simultaneously, capable of verifying essential human values. (Author)

  18. Novel optical probe for quantum Hall system

    Indian Academy of Sciences (India)

    to 8 T using SPV spectroscopy. Keywords. Surface photovoltage spectroscopy; quantum Hall effect; Landau levels; edge states. PACS Nos 73.43.-f; 07.60.-j; 73.43.Fj. 1. Introduction. Integer quantum Hall effect (QHE) arises from quantization of energy of two- dimensional electron gas (2DEG) under perpendicular magnetic ...

  19. Writing lives in sport

    DEFF Research Database (Denmark)

    Christensen, Mette Krogh

    Writing lives in sport is a book of stories about sports-persons. The people concerned include sports stars, sports people who are not quite so famous, and relatively unknown physical education teachers and sports scientists.Writing lives in sport raises questions about writing biographies...... in the academis world of sport studies. It does not set out to be a methodological treatise but through the writing of lives in sports does raise questions of method. Each essay in this collection deals with problems of writing sports-people's lives. These essays could be said to fall along a spectrum from those...

  20. Report on Sport 2003

    NARCIS (Netherlands)

    Koen Breedveld; Rob Goossens; Maarten van Bottenburg; Wil Ooijendijk; Vincent Hildebrandt; Maarten Stiggelbout; Jo Lucassen; Hugo van der Poel

    2003-01-01

    Original title: Rapportage Sport 2003. There has been a huge increase in the interest in sport in recent decades. The number of people taking part in sport has grown strongly and more sport is broadcast on television than ever before. The government has invested a great deal in sport, not

  1. Monitoring of Hall's Harbor wharf

    Science.gov (United States)

    Newhook, John P.; Bakht, Baidar; Mufti, Aftab A.; Tadros, Gamil

    2001-08-01

    The Hall's Harbour wharf in Nova Scotia is the first Canadian project to demonstrate the application of fibre reinforced polymer reinforcement, the steel-free concrete deck slab concept and fibre optic monitoring systems to structures in the marine environment. The extreme environmental exposure conditions make the site an excellent location for testing both material performance and sensing system durability. The early results of the monitoring program indicate that the innovative structure is meeting service level performance requirements. Long-term durability assessment is continuing and being complemented by controlled field and laboratory testing programs. Continuous remote monitoring of the fibre optic sensors is producing valuable reinforcement strain information for tracking structural response to ambient conditions. The fibre optic sensors themselves were found to be rugged enough to withstand the construction process and exposure environment; however, further work is required to achieve feasible field units for some types of fibre optic sensing instruments and associated equipment.

  2. Sports Medicine Today

    Science.gov (United States)

    Ryan, Allan J.

    1978-01-01

    Includes a general discussion of sports medicine including exercise and conditioning techniques, prevention of illness and injury, treatment of and rehabilitation after sports injury, and the future of sports medicine. (BB)

  3. Dealing with Sports Injuries

    Science.gov (United States)

    ... Videos for Educators Search English Español Dealing With Sports Injuries KidsHealth / For Teens / Dealing With Sports Injuries ... a long way toward preventing injuries. Types of Sports Injuries Common reasons why teens get injured playing ...

  4. Sports and Concussions

    Science.gov (United States)

    ... Staying Safe Videos for Educators Search English Español Sports and Concussions KidsHealth / For Teens / Sports and Concussions ... skiers or snowboarders How Can I Prevent a Sports Concussion? Start With the Right Equipment Everyone should ...

  5. Sports cream overdose

    Science.gov (United States)

    Sports creams are creams or ointments used to treat aches and pains. Sports cream overdose can occur if someone uses this ... Two ingredients in sports creams that can be poisonous are: Menthol Methyl salicylate

  6. Eye Injuries in Sports

    Science.gov (United States)

    ... and Sugar Substitutes Exercise and Fitness Exercise Basics Sports Safety Injury Rehabilitation Emotional Well-Being Mental Health ... Splints Home Prevention and Wellness Exercise and Fitness Sports Safety Eye Injuries in Sports Eye Injuries in ...

  7. Transport measurements and simulations of GaAs/AlGaAs ``anti-Hall-bar within a Hall bar'' devices

    Science.gov (United States)

    Kriisa, Annika; Mani, Ramesh G.

    2009-03-01

    Hall effect measurements are often carried out in the Hall geometry, which is a thin rectangular plate with current and Hall voltage contacts at the external boundary. The motivation of this study is to further understand the impact on Hall effect when a hole is inserted inside Hall geometry. One way on conducting this investigation is to superimpose an ``anti-Hall bar'' inside the standard Hall bar, where the anti Hall bar is actually the hole inside the Hall device with contacts on the inside boundary of this hole. This configuration is thought to generate an ordinary Hall effect within the interior boundary such that the interior Hall voltage divided by the interior injected current equals the Hall resistance. One believes that it might also be possible to simultaneously realize multiple independent Hall effects by injecting multiple currents into the multiply connected device [1]. We have studied Hall effect in the doubly connected ``anti-Hall bar within a Hall bar'' geometry fabricated out of the GaAs/AlGaAs semiconductor system. Also the simulations of the distribution of the Hall current and potential profile within the specimen are conducted. To attain understanding of how the Hall effect arises in this geometry, the simulation plots are compared to the experimental results. [1] R. G. Mani and K. von Klitzing, App. Phys. Lett. 1993, 64, 1262-1264.

  8. SUSTAINED LIVEABILITY: A FRAMEWORK BEYOND ENERGY CONSCIOUS BUILDING CONSERVATION OF MARKET HALLS

    Directory of Open Access Journals (Sweden)

    Neveen Hamza

    2017-11-01

    Full Text Available Market halls are commonly found in  contexts of cultural and heritage value. Positioned in urban centres and transport networks, these unique buildings were originally constructed in the 19th century to ensure better food distribution in growing European cities, then copied to other territories such as Egypt.  We argue that leaving market halls, with their large spanning structures and indoor open space, for dilapidation is a lost opportunity for sustaining community engagement, and educating the public on the original sustainability, neighbourhood regeneration and cultural thinking that underpinned these buildings. The proposed framework extends current sustainable ‘heritage conservation frameworks’ beyond concepts of adding renewable energy technologies, recycling and sustainable goods movement,  to ‘sustaining liveability and social inclusion’. We argue that market halls offer the opportunities to merge the daily activities of buying and selling food with creating local creative economies such as culinary art exhibitions, and culinary schools. The paper consists of two parts: the first discusses the historical urban context of market halls in Cairo; the second proposes a sustainable heritage conservation model for market halls.

  9. Preventing Children's Sports Injuries

    Science.gov (United States)

    ... Dealing With Sports Injuries Concussions: What to Do Sports and Concussions Burner (Stinger) Concussions: Alex's Story Compulsive Exercise Repetitive Stress Injuries View more Partner Message About Us Contact ...

  10. The quantum Hall effects: Philosophical approach

    Science.gov (United States)

    Lederer, P.

    2015-05-01

    The Quantum Hall Effects offer a rich variety of theoretical and experimental advances. They provide interesting insights on such topics as gauge invariance, strong interactions in Condensed Matter physics, emergence of new paradigms. This paper focuses on some related philosophical questions. Various brands of positivism or agnosticism are confronted with the physics of the Quantum Hall Effects. Hacking's views on Scientific Realism, Chalmers' on Non-Figurative Realism are discussed. It is argued that the difficulties with those versions of realism may be resolved within a dialectical materialist approach. The latter is argued to provide a rational approach to the phenomena, theory and ontology of the Quantum Hall Effects.

  11. Quantized Hall conductance as a topological invariant

    International Nuclear Information System (INIS)

    Niu, Q.; Thouless, Ds.J.; Wu, Y.S.

    1984-10-01

    Whenever the Fermi level lies in a gap (or mobility gap) the bulk Hall conductance can be expressed in a topologically invariant form showing the quantization explicitly. The new formulation generalizes the earlier result by TKNN to the situation where many body interaction and substrate disorder are also present. When applying to the fractional quantized Hall effect we draw the conclusion that there must be a symmetry breaking in the many body ground state. The possibility of writing the fractionally quantized Hall conductance as a topological invariant is also carefully discussed. 19 references

  12. Childhood Sports Participation and Adolescent Sport Profile.

    Science.gov (United States)

    Gallant, François; O'Loughlin, Jennifer L; Brunet, Jennifer; Sabiston, Catherine M; Bélanger, Mathieu

    2017-12-01

    We aimed to increase understanding of the link between sport specialization during childhood and adolescent physical activity (PA). The objectives were as follows: (1) describe the natural course of sport participation over 5 years among children who are early sport samplers or early sport specializers and (2) determine if a sport participation profile in childhood predicts the sport profile in adolescence. Participants ( n = 756, ages 10-11 years at study inception) reported their participation in organized and unorganized PA during in-class questionnaires administered every 4 months over 5 years. They were categorized as early sport samplers, early sport specializers, or nonparticipants in year 1 and as recreational sport participants, performance sport participants, or nonparticipants in years 2 to 5. The likelihood that a childhood sport profile would predict the adolescent profile was computed as relative risks. Polynomial logistic regression was used to identify predictors of an adolescent sport profile. Compared with early sport specialization and nonparticipation, early sport sampling in childhood was associated with a higher likelihood of recreational participation (relative risk, 95% confidence interval: 1.55, 1.18-2.03) and a lower likelihood of nonparticipation (0.69, 0.51-0.93) in adolescence. Early sport specialization was associated with a higher likelihood of performance participation (1.65, 1.19-2.28) but not of nonparticipation (1.01, 0.70-1.47) in adolescence. Nonparticipation in childhood was associated with nearly doubling the likelihood of nonparticipation in adolescence (1.88, 1.36-2.62). Sport sampling should be promoted in childhood because it may be linked to higher PA levels during adolescence. Copyright © 2017 by the American Academy of Pediatrics.

  13. Creating sport consumers in Dutch sport policy

    NARCIS (Netherlands)

    van der Roest, Jan Willem; Vermeulen, Jeroen; van Bottenburg, Maarten

    2015-01-01

    This article deals with the tension between the association logic and the market logic that appears in the domain of voluntary sport clubs (VSCs). We present a qualitative analysis of sport policy texts of fifteen Dutch national sport organizations (NSOs) and the national umbrella organization to

  14. Creating sport consumers in Dutch sport policy

    NARCIS (Netherlands)

    van der Roest, Jan Willem; Vermeulen, Jeroen; van Bottenburg, Maarten; LS Sportontw. & Managing Social Issues; UU LEG Research USG Public Matters Managing Social Issues; LS Management van Cultuur en Zingeving

    2014-01-01

    This article deals with the tension between the association logic and the market logic that appears in the domain of voluntary sport clubs (VSCs). We present a qualitative analysis of sport policy texts of fifteen Dutch national sport organizations (NSOs) and the national umbrella organization to

  15. Safe! Sports, Campers & Reducing Sports Injuries.

    Science.gov (United States)

    Thomson, Beth J.

    1989-01-01

    Acceptance of adult roles by children increases "adult injuries," notably broken bones from sports. Suggests camp administrators be familiar with clientele, particular sports, and the kinds of injuries that generally result in each. Discusses children's age, types of sports, and other factors that come into play when anticipating and treating…

  16. [Medicine in sports or sport medicine?] ].

    Science.gov (United States)

    Heimer, S; Tonković-Lojović, M

    2001-01-01

    Sports medicine is a profession pertaining to primary health care of sport population (competitors, coaches, referees, participants in sports recreation). It embraces the physical and mental health protection and promotion of participants in relation to a particular sport activity and sport environment, directing athletes to a sport and adapting them to sport and the sport to them. Sports medicine takes part in selection procedure, training process planning and programming, and cares for epidemiological, hygienic, nutritional and other problems in sport. The Republic of Croatia belongs to those world states in which the field of sports medicine is regulated neither by a law or by profession. A consequence is that wide circle of physicians and paramedics work in clubs and various medical units without any legal or/and professional control not being adequately educated nor having licence for it. This review is an appeal to the Croatian Medical Chamber and the Ministry of Health to make efforts to promote the education and medical profession in sports medicine.

  17. Spin Hall effect, Hall effect and spin precession in diffusive normal metals

    OpenAIRE

    Shchelushkin, R. V.; Brataas, Arne

    2005-01-01

    We study transport in normal metals in an external magnetic field. This system exhibits an interplay between a transverse spin imbalance (spin Hall effect) caused by the spin-orbit interaction, a Hall effect via the Lorentz force, and spin precession due to the Zeeman effect. Diffusion equations for spin and charge flow are derived. The spin and charge accumulations are computed numerically in experimentally relevant thin film geometries. The out-of-plane spin Hall potential is suppressed whe...

  18. Topologically induced fractional Hall steps in the integer quantum Hall regime of MoS 2

    Science.gov (United States)

    Firoz Islam, SK; Benjamin, Colin

    2016-09-01

    The quantum magnetotransport properties of a monolayer of molybdenum disulfide are derived using linear response theory. In particular, the effect of topological terms on longitudinal and Hall conductivity is analyzed. The Hall conductivity exhibits fractional steps in the integer quantum Hall regime. Further complete spin and valley polarization of the longitudinal conductivitity is seen in presence of these topological terms. Finally, the Shubnikov-de Hass oscillations are suppressed or enhanced contingent on the sign of these topological terms.

  19. SUPPLEMENT TO HUMANISTIC CONCEPT OF YOUTHS’ SPORTS

    Directory of Open Access Journals (Sweden)

    Duško Bjelica

    2011-08-01

    Full Text Available Sport of the children and youths represents an ideal educative medium able to contribute to optimal personal and social development of the youths. However, positive influence of sports on their psycho-physical development does not have to be always expressed, especially when the victory on competitions is over-stressed. In such circumstances, a sportive environment can become to the children and youths a source of high pressure and stress, which can be the reason why they leave the sport, failing to realise their potential sport talents and predispositions. Whether the youths’ sport will become a mean for improvement of their psycho-physical development or the source of negative experiences mostly depends on the way it is organised and coached by adults, as well as on the aims they find primary. If we accept the humanistic concept of the youths’ sport, in which the victory is not the only aim, we will teach the children how to enjoy the sports, how to develop their inner motivation and how to become successful if they do their best. In this way, we will increase the chance to use a great educative potential and to put it in the service of health and proper development of the youths.

  20. Bound values for Hall conductivity of heterogeneous medium under ...

    Indian Academy of Sciences (India)

    Bound values for Hall conductivity under quantum Hall effect (QHE) conditions in inhomogeneous medium has been studied. It is shown that bound values for Hall conductivity differ from bound values for metallic conductivity. This is due to the unusual character of current percolation under quantum Hall effect conditions.

  1. Athletics hall, Odenwald school, Heppenheim, Germany

    Energy Technology Data Exchange (ETDEWEB)

    Schuler, M. [Trans Solar GmbH, Stuttgart (Germany)

    1999-07-01

    This building, completed in 1995, is a good example of how to use a glazed foyer, not only as a climatic buffer zone, but also for preheating the inlet air by solar gains. The completely glazed west-oriented foyer is used as a huge air collector to preheat ventilation air during the heating period. The glass superstructure across the hall stores a movable curtain, serves as a skylight and enhances the natural ventilation of the hall due to the chimney effect. The stiffening ribs of the floor are also used as an air duct to the hall and as an installation duct. Photovoltaic-powered fans are used to move solar preheated air into the hall. (author)

  2. AA under construction in its hall

    CERN Multimedia

    CERN PhotoLab

    1980-01-01

    The Antiproton Accumulator was installed in a specially built hall. Here we see it at an "early" stage of installation, just a few magnets on the floor, no vacuum chamber at all, but: 3 months later there was circulating beam !

  3. Multiscale Modeling of Hall Thrusters Project

    Data.gov (United States)

    National Aeronautics and Space Administration — New multiscale modeling capability for analyzing advanced Hall thrusters is proposed. This technology offers NASA the ability to reduce development effort of new...

  4. Light Metal Propellant Hall Thruster, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — Busek proposes to develop light metal Hall Effect thrusters that will help reduce the travel time, mass, and cost of SMD spacecraft. Busek has identified three...

  5. "Is Social Inclusion through PE, Sport and PA Still a Rhetoric?" Evaluating the Relationship between Physical Education, Sport and Social Inclusion

    Science.gov (United States)

    Dagkas, Symeon

    2018-01-01

    This Special Issue is part of "Educational Review's" Hall of Fame, comprising the journal's most read and highly cited papers. As part of this I will be critiquing a milestone paper within the field(s) of Sport, PE and (I will extend to) PA by Professor Richard Bailey. The paper (see EJ691124) has been amongst the most-cited in the…

  6. BS sport

    OpenAIRE

    Pruchnický, Lukáš

    2014-01-01

    Předmětem diplomové práce je návrh novostavby sportovního zařízení na úrovni dokumentace pro provedení stavby. Návrh klade důraz na dispoziční řešení včetně zajištění konstrukce pro statické stránce, architektonické, požární bezpečnosti, úspory energie a bezpečnosti při užívání objektu. Práce obsahuje textovou i grafickou část. Grafická část práce je zpracována v programu ArchiCad. The subject of the diploma thesis is to design a new building of sports facilities at the documentation for b...

  7. Mesoscopic effects in the quantum Hall regime

    Indian Academy of Sciences (India)

    The seven magnetic sub-bands are well separated by energy gaps at disorder strengthW =0.5. The Hall conductance of each of the q magnetic sub-bands, when they are separated by energy gaps, have been shown to be quantized [13]. The Hall conductance σ r (in units of e2/h), when the lowest r sub-bands are occupied, ...

  8. Hall effect in organic layered conductors

    Directory of Open Access Journals (Sweden)

    R.A.Hasan

    2006-01-01

    Full Text Available The Hall effect in organic layered conductors with a multisheeted Fermi surfaces was considered. It is shown that the experimental study of Hall effect and magnetoresistance anisotropy at different orientations of current and a quantizing magnetic field relative to the layers makes it possible to determine the contribution of various charge carriers groups to the conductivity, and to find out the character of Fermi surface anisotropy in the plane of layers.

  9. Sports Medicine in China.

    Science.gov (United States)

    Bloomquist, Lorraine E.

    This report on a visit to the People's Republic of China in April 1985 to explore methodology of sports science research, treatment of injuries, and role of sports in everyday life discusses the following topics: (1) introduction to China; (2) sports and physical culture; (3) sports medicine and rehabilitation; (4) health factors; (5) cost of…

  10. Report on Sport 2008

    NARCIS (Netherlands)

    Koen Breedveld; Carlijn Kamphuis; Annet Tiessen-Raaphorst

    2008-01-01

    Original title: Rapportage sport 2008. Sport: it appeals to people; it brings people together; it promotes health; and it is profitable. Today, in 2008, sport is enjoying popularity as never before. Two-thirds of the Dutch population take part in some form of sport. After swimming and cycling,

  11. Sport and culture

    NARCIS (Netherlands)

    Annet Tiessen-Raaphorst; Andries van den Broek

    2016-01-01

    Oringinal title: Sport en cultuur Many people derive enjoyment from sport and culture in their free time: attending matches, performances, exhibitions or festivals, following sport and culture via the media or participating in a sport or cultural activity. Who takes part in which activities? Does

  12. COMMUNICATIONS IN SPORT

    Directory of Open Access Journals (Sweden)

    Spasoje Bjelica

    2006-06-01

    Full Text Available Analyzing questions related to business communications, especially communications in sport, is possible if the analysis of the size and the subject of the communication concept has been done before, in order to enter into a specific stratum of sport communications. This stratum contains the subjects of communications which could be realized in sport or somehow are connected with sport.

  13. Report on Sport 2003

    OpenAIRE

    Koen Breedveld; Rob Goossens; Maarten van Bottenburg; Wil Ooijendijk; Vincent Hildebrandt; Maarten Stiggelbout; Jo Lucassen; Hugo van der Poel

    2003-01-01

    Original title: Rapportage Sport 2003. There has been a huge increase in the interest in sport in recent decades. The number of people taking part in sport has grown strongly and more sport is broadcast on television than ever before. The government has invested a great deal in sport, not least because of the growing awareness of the positive effect that sport can have on health, social cohesion and the economy. Sport is now an integral part of society and has developed into the biggest infor...

  14. Sport Specialization, Part I

    OpenAIRE

    Myer, Gregory D.; Jayanthi, Neeru; Difiori, John P.; Faigenbaum, Avery D.; Kiefer, Adam W.; Logerstedt, David; Micheli, Lyle J.

    2015-01-01

    Context: There is increased growth in sports participation across the globe. Sports specialization patterns, which include year-round training, participation on multiple teams of the same sport, and focused participation in a single sport at a young age, are at high levels. The need for this type of early specialized training in young athletes is currently under debate. Evidence Acquisition: Nonsystematic review. Study Design: Clinical review. Level of Evidence: Level 4. Conclusion: Sports sp...

  15. Sport and measurement of competition

    NARCIS (Netherlands)

    Koning, R.H.

    Sport is becoming an activity of increasing importance: over time more people participate in sport (active sport consumption), more time is spent watching sport (passive sport consumption). An important part of sport consumption is passive sport consumption where production and consumption are

  16. Parental Leave in Denmark

    DEFF Research Database (Denmark)

    Rostgaard, Tine; Christoffersen, Mogens; Weise, Hanne

    This artcle considders the political aims for different leave schemes and reviews studies af these schemes. The use of parental leave is sensitive to the financial loss involved in taking leave: a decrease in the benefit payments has had a significant influence on take-up, while, in general......, families'' loss of income is less if leave is taken up by the mothers. Only few fathers participate in parental leave....

  17. 75 FR 22770 - Gary E. Hall and Rita Hall; Notice of Availability of Environmental Assessment

    Science.gov (United States)

    2010-04-30

    ... project and concludes that exempting the project from licensing, with appropriate environmental measures.... Hall and Rita Hall; Notice of Availability of Environmental Assessment April 22, 2010. In accordance with the National Environmental Policy Act of 1969, as amended, and the Federal Energy Regulatory...

  18. MANAGEMENT PARTICULARITIES IN SPORTS

    Directory of Open Access Journals (Sweden)

    FLORIN NEFERU

    2017-02-01

    Full Text Available Management applied in sport contributes to achieving full functionality of sports structures, the large masses of people, a plurality of means and skills, objectives and intentions. Through the efforts of management in sport individuals or groups of people are coordinated towards achieving a common goal, complicated and difficult process due to concerns divergent which always, through his, they are converted into cutting issues ensuring mobility objectives. Sports management helps to master and control both situations and complex systems ensuring permanent and continuous management of a multitude of sporting activities generating efficiency. Particularities of management in sport resides in that it applies to all forms of sports, all sports disciplines, which provides an organized leading to superior results in sporting competitions.

  19. [Sports medicine in Germany].

    Science.gov (United States)

    Dickhuth, H-H

    2005-08-01

    Sports medicine covers many different aspects, ranging from clinical specialties, such as internal medicine, orthopedics or pediatrics to physiology and sports sciences. The requirements for sports medicine evolve mainly from exercise physiology (elite, leisure and health oriented physical activity), orthopedics and traumatology as well as from preventive and rehabilitative issues. In the new German curriculum, sports medicine is defined as a subspecialty. Historically, sports medicine in Germany has a federal structure with a governing body (Deutsche Gesellschaft für Sportmedizin und Prävention). Due to these facts, University Departments of Sports Medicine (which vary greatly in size and performance) are either attached to Medical or non-Medical Faculties, such as Sports Sciences. In medical schools, sports medicine can be selected as an elective subject. However, the main part of teaching sports medicine is covered by Sports Science Faculties. In an international context, the strength of German sports medicine is its clinical orientation and close cooperation with the sport itself, especially high-performance sports. In the future, like in the Anglo- American countries, sports medicine in Germany will play a major role in health prevention and rehabilitation.

  20. Air temperature gradient in large industrial hall

    Science.gov (United States)

    Karpuk, Michał; Pełech, Aleksander; Przydróżny, Edward; Walaszczyk, Juliusz; Szczęśniak, Sylwia

    2017-11-01

    In the rooms with dominant sensible heat load, volume airflow depends on many factors incl. pre-established temperature difference between exhaust and supply airflow. As the temperature difference is getting higher, airflow volume drops down, consequently, the cost of AHU is reduced. In high industrial halls with air exhaust grids located under the ceiling additional temperature gradient above working zone should be taken into consideration. In this regard, experimental research of the vertical air temperature gradient in high industrial halls were carried out for the case of mixing ventilation system The paper presents the results of air temperature distribution measurements in high technological hall (mechanically ventilated) under significant sensible heat load conditions. The supply airflow was delivered to the hall with the help of the swirl diffusers while exhaust grids were located under the hall ceiling. Basing on the air temperature distribution measurements performed on the seven pre-established levels, air temperature gradient in the area between 2.0 and 7.0 m above the floor was calculated and analysed.

  1. Extrinsic spin Hall effect in graphene

    Science.gov (United States)

    Rappoport, Tatiana

    The intrinsic spin-orbit coupling in graphene is extremely weak, making it a promising spin conductor for spintronic devices. In addition, many applications also require the generation of spin currents in graphene. Theoretical predictions and recent experimental results suggest one can engineer the spin Hall effect in graphene by greatly enhancing the spin-orbit coupling in the vicinity of an impurity. The extrinsic spin Hall effect then results from the spin-dependent skew scattering of electrons by impurities in the presence of spin-orbit interaction. This effect can be used to efficiently convert charge currents into spin-polarized currents. I will discuss recent experimental results on spin Hall effect in graphene decorated with adatoms and metallic cluster and show that a large spin Hall effect can appear due to skew scattering. While this spin-orbit coupling is small if compared with what it is found in metals, the effect is strongly enhanced in the presence of resonant scattering, giving rise to robust spin Hall angles. I will present our single impurity scattering calculations done with exact partial-wave expansions and complement the analysis with numerical results from a novel real-space implementation of the Kubo formalism for tight-binding Hamiltonians. The author acknowledges the Brazilian agencies CNPq, CAPES, FAPERJ and INCT de Nanoestruturas de Carbono for financial support.

  2. Field theory approach to quantum hall effect

    International Nuclear Information System (INIS)

    Cabo, A.; Chaichian, M.

    1990-07-01

    The Fradkin's formulation of statistical field theory is applied to the Coulomb interacting electron gas in a magnetic field. The electrons are confined to a plane in normal 3D-space and also interact with the physical 3D-electromagnetic field. The magnetic translation group (MTG) Ward identities are derived. Using them it is shown that the exact electron propagator is diagonalized in the basis of the wave functions of the free electron in a magnetic field whenever the MTG is unbroken. The general tensor structure of the polarization operator is obtained and used to show that the Chern-Simons action always describes the Hall effect properties of the system. A general proof of the Streda formula for the Hall conductivity is presented. It follows that the coefficient of the Chern-Simons terms in the long-wavelength approximation is exactly given by this relation. Such a formula, expressing the Hall conductivity as a simple derivative, in combination with diagonal form of the full propagator allows to obtain a simple expressions for the filling factor and the Hall conductivity. Indeed, these results, after assuming that the chemical potential lies in a gap of the density of states, lead to the conclusion that the Hall conductivity is given without corrections by σ xy = νe 2 /h where ν is the filling factor. In addition it follows that the filling factor is independent of the magnetic field if the chemical potential remains in the gap. (author). 21 ref, 1 fig

  3. Major international sport profiles.

    Science.gov (United States)

    Patel, Dilip R; Stier, Bernhard; Luckstead, Eugene F

    2002-08-01

    Sports are part of the sociocultural fabric of all countries. Although different sports have their origins in different countries, many sports are now played worldwide. International sporting events bring athletes of many cultures together and provide the opportunity not only for athletic competition but also for sociocultural exchange and understanding among people. This article reviews five major sports with international appeal and participation: cricket, martial arts, field hockey, soccer, and tennis. For each sport, the major aspects of physiological and biomechanical demands, injuries, and prevention strategies are reviewed.

  4. Introducing the National Institute for Sports Medicine in Hungary: a complex sports medical healthcare and screening system.

    Science.gov (United States)

    Laki, Judit; Soós, Ágnes; Jákó, Péter; Tállay, András; Perjés, Ábel; Szabó, Anita Megyeriné

    2017-01-01

    The Hungarian National Institute for Sports Medicine (NISM) was founded in 1952 to provide medical coverage for national teams, screening and periodic health evaluation (PHE) for all Hungarian athletes. The system of 'all in one and ASAP' evolved by now to a specific state-funded healthcare provider with complex sports medical and sport-related services available for athletes. The NISM created a countrywide network to make health clearance available for all athletes close to their place of residency. This centralised system guarantees the uniformity and financial independence of the network, as it is directly financed by the government and free for every competitive athlete. Thus, it leaves no chance for conflict of interest in evaluating athletes' eligibility. In 2013, NISM established an online registry for preparticipation screening and PHE. This made the registry available for sports physicians and certain data for both sports physicians and athletes themselves. Furthermore, NISM created a nationwide, centrally coordinated, out of turn care with central coordination for elite athletes nationwide. Outpatient and inpatient clinics of NISM provide sports-specific care. Most of the minimally invasive techniques used at the Department of Sports Surgery are applied only here in the country. The medical staff of NISM has special experience in Sports Medicine and sport-related conditions. All tasks are managed within the same system, within institutional frames by professionals at Sports Medicine, which guarantees institutional expertise, competence and responsibility. Our aim is to introduce the complex system, the services and the recent achievements of the Hungarian NISM.

  5. Shielding consideration for the SSCL experimental halls

    International Nuclear Information System (INIS)

    Bull, J.; Coyne, J.; Mokhov, N.; Stapleton, G.

    1994-03-01

    The Superconducting Super Collider which is being designed and built in Waxahachie, Texas consists Of series of proton accelerators, culminating in a 20 Te proton on proton collider. The collider will be in a tunnel which will be 87 km in circumference and. on average about 30 meters underground. The present design calls for two large interaction halls on the east side of the ring. The shielding for these halls is being designed for an interaction rate of 10 9 Hz or 10 16 interactions per year, based on 10 7 seconds per operational year. SSC guidelines require that the shielding be designed to meet the criterion of 1mSv per year for open areas off site 2mSv per year for open areas on site, and 2mSv per year for controlled areas. Only radiation workers will be routinely allowed to work in controlled areas. It should be pointed that there is a potential for an accidental full beam loss in either of the experimental halls, and this event would consist of the loss of the full circulating beam up to 4 x 10 14 protons. With the present design. the calculated dose equivalent for this event is about 10% of the annual dose equivalent for the normal p-p interactions, so that die accident condition does not control the shielding. If, for instance, local shielding within the experimental hall is introduced into the calculations, this could change. The shielding requirements presented here are controlled by the normal p-p interactions. Three important questions were addressed in the present calculations. They are (1) the thickness of the roof over the experimental halls, (2) the configuration of the shafts and adits which give access to the halls, and (3) the problem of ground water and air activation

  6. Enhanced Performance of Cylindrical Hall Thrusters

    International Nuclear Information System (INIS)

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

    2007-01-01

    The cylindrical thruster differs significantly in its underlying physical mechanisms from the conventional annular Hall thruster. It features high ionization efficiency, quiet operation, ion acceleration in a large volume-to-surface ratio channel, and performance comparable with the state-of-the-art conventional Hall thrusters. Very significant plume narrowing, accompanied by the increase of the energetic ion fraction and improvement of ion focusing, led to 50-60% increase of the thruster anode efficiency. These improvements were achieved by overrunning the discharge current in the magnetized thruster plasma

  7. Prototype dining hall energy efficiency study

    Energy Technology Data Exchange (ETDEWEB)

    Mazzucchi, R.P.; Bailey, S.A.; Zimmerman, P.W.

    1988-06-01

    The energy consumption of food service facilities is among the highest of any commercial building type, owing to the special requirements for food preparation, sanitation, and ventilation. Consequently, the US Air Force Engineering and Services Center (AFESC) contracted with Pacific Northwest Laboratory (PNL) to collect and analyze end-use energy consumption data for a prototypical dining hall and make specific recommendations on cost-effective energy conservation options. This information will be used to establish or update criteria for dining hall designs and retrofits as appropriate. 6 refs., 21 figs., 23 tabs.

  8. Sport and globalization

    DEFF Research Database (Denmark)

    Gems, Gerald R.; Pfister, Gertrud Ursula

    2014-01-01

    The authors describe, analyze and evaluate sport related globalization processes with a focus on transnationalism, colonialism, imperialism, and, more generally, geopolitical developments. They provide a variety of theoretical frameworks as they explore the emergence of modern sport and its...

  9. Sports and Concussion

    Science.gov (United States)

    ... this page please turn JavaScript on. Feature: Concussion Sports and Concussion Past Issues / Summer 2015 Table of ... ages—reducing blows to the head by playing sports safely and avoiding falls is vital to a ...

  10. Goodbye, Mandatory Maternity Leaves

    Science.gov (United States)

    Nation's Schools, 1972

    1972-01-01

    In precedent-setting decrees, courts and federal and State authorities have branded compulsory maternity leaves either unconstitutional or illegal. School administrators are urged to prod boards of education to adopt more lenient maternity leave policies -- now. (Author)

  11. DRUGS IN SPORT

    Directory of Open Access Journals (Sweden)

    David R. Mottram

    2005-12-01

    Full Text Available This new edition includes fresh information regarding drugs use and abuse in sport and the updated worldwide anti-doping laws, and changes to the prohibited and therapeutic use exemption lists. The objectives of the book are to review/discuss the latest information on drugs in sport by considering i actions of drugs and hormones, ii medication and nutritional supplements in sport, iii the latest doping control regulations of the WADA, iv the use of banned therapeutic drugs in sport, v an assessment of the prevalence of drug taking in sport. FEATURES A common, uniform strategy and evidence-based approach to organizing and interpreting the literature is used in all chapters. This textbook is composed of twelve parts with sub-sections in all of them. The topics of the parts are: i An introduction to drugs and their use in sport, ii Drug use and abuse in sport, iii Central nervous system stimulants, iv WADA regulations in relation to drugs used in the treatment of respiratory tract disorders, v Androgenic anabolic steroids, vi Peptide and glycoprotein hormones and sport, vii Blood boosting and sport, viii Drug treatment of inflammation in sports injuries, ix Alcohol, anti-anxiety drugs and sport, x Creatine, xi Doping control and sport, xii Prevalence of drug misuse in sport. Each specific chapter has been systematically developed from the data available in prospective, retrospective, case-control, and cross-sectional studies. The tables and figures are numerous, helpful and very useful. AUDIENCE The book provides a very useful resource for students on sports related courses, coaches and trainers, researchers, nutritionists, exercise physiologists, pharmacologists, healthcare professionals in the fields of sports medicine and those involved in the management and administration side of sport. The readers are going to discover that this is an excellent reference book. Extensively revised new edition of this book is also a first-rate resource for

  12. Investigating sport celebrity endorsement and sport event ...

    African Journals Online (AJOL)

    When detailed product information is not available to consumers inferences are made using product cues to reduce uncertainty and to form perceptions of products. Advertisers can make use of sport sponsorship and sport celebrity endorsement as extrinsic cues to influence consumers\\' pre-purchase attitudes. These cues ...

  13. SOCIAL ASPECTS OF SPORT

    OpenAIRE

    YETİM, Azmi

    2000-01-01

    Sport is themost effective and common social institute of modern societies. The mostimportant element of societies is individual. Societies in which individualshealthy, well educated, social and cultured could be thought as modern basicaim of sport is to support the development of human in terms of physical mentaland social. And also sport is very effective phenomenon to create a modernsociety. In addition personel benefits and missions sport has very importantsocial effects. In this age, it ...

  14. Drugs in sport

    OpenAIRE

    Robinson, D

    2007-01-01

    This new edition includes fresh information regarding drugs use and abuse in sport and the updated worldwide anti-doping laws, and changes to the prohibited and therapeutic use exemption lists. The objectives of the book are to review/discuss the latest information on drugs in sport by considering i) actions of drugs and hormones, ii) medication and nutritional supplements in sport, iii) the latest doping control regulations of the WADA, iv) the use of banned therapeutic drugs in sport, v) an...

  15. Sport in the Netherlands

    NARCIS (Netherlands)

    Annet Tiessen-Raaphorst; Koen Breedveld

    2007-01-01

    Sport is a popular pastime in the Netherlands; 10 million people take part in at least one sport. To do this, they can choose from more than 27,000 non-profit sports clubs, or more than 5,000 commercial providers such as fitness centres or riding stables. These clubs and commercial providers

  16. LAW IMPLEMENTATION IN SPORT

    Directory of Open Access Journals (Sweden)

    Mexhid Krasniqi

    2011-09-01

    Full Text Available This work offers a short review of sports marketing and management. It presents different ways of advertising some products either in sports events or throng electronic mediums. In addition, it reviles different aspects of the influence that politics and discrimination has on sport as well as the way of solving eventual arguments of any kind.

  17. Sport and Social Organization.

    Science.gov (United States)

    Nixon, Howard L., II

    Sport is examined in relation to a number of basic aspects of social organization. Each of the seven sections includes a brief clarification of the key sociological concepts used for analysis, a consideration of various applications of those concepts to sport, and a review and discussion of what is known about specific aspects of sport in relation…

  18. Changing spaces for sports

    DEFF Research Database (Denmark)

    Kural, René

    2010-01-01

    The author argues that the fundamental values associated with sports seem to have changed. Accordingly spaces for sports are also undergoing change.The essay gives a number of examples of these new sports spaces. Their common denominator lies in their urban proximity, the combination of previously...... irreconcilable functions, high adaptability and the fact that they often make use of urban residual areas....

  19. Sport Specialization, Part I

    Science.gov (United States)

    Myer, Gregory D.; Jayanthi, Neeru; Difiori, John P.; Faigenbaum, Avery D.; Kiefer, Adam W.; Logerstedt, David; Micheli, Lyle J.

    2015-01-01

    Context: There is increased growth in sports participation across the globe. Sports specialization patterns, which include year-round training, participation on multiple teams of the same sport, and focused participation in a single sport at a young age, are at high levels. The need for this type of early specialized training in young athletes is currently under debate. Evidence Acquisition: Nonsystematic review. Study Design: Clinical review. Level of Evidence: Level 4. Conclusion: Sports specialization is defined as year-round training (greater than 8 months per year), choosing a single main sport, and/or quitting all other sports to focus on 1 sport. Specialized training in young athletes has risks of injury and burnout, while the degree of specialization is positively correlated with increased serious overuse injury risk. Risk factors for injury in young athletes who specialize in a single sport include year-round single-sport training, participation in more competition, decreased age-appropriate play, and involvement in individual sports that require the early development of technical skills. Adults involved in instruction of youth sports may also put young athletes at risk for injury by encouraging increased intensity in organized practices and competition rather than self-directed unstructured free play. Strength-of-Recommendation Taxonomy (SORT): C. PMID:26502420

  20. Changing spaces for sports

    DEFF Research Database (Denmark)

    Kural, René

    2010-01-01

    The author argues that the fundamental values associated with sports seem to have changed. Accordingly spaces for sports are also undergoing change.The essay gives a number of examples of these new sports spaces. Their common denominator lies in their urban proximity, the combination of previously...

  1. Sports and Your Eyes

    Science.gov (United States)

    ... Tricks Links to More Information Optical Illusions Printables Sports and Your Eyes Gear up! If you play sports, you know they can be a lot of ... the right safety gear. Think about your favorite sport. Do you wear anything to protect your eyes, ...

  2. 4 Corruption in Sport

    OpenAIRE

    Andreff, Wladimir

    2016-01-01

    International audience; A typology of sport corruption differentiates petty corruption, barter corruption, corruption at the level of sport governing bodies, betting scandals and point-shaving. A deeper analysis goes further as regards match fixing-related bets and global online fraudulent sport betting networks and suggests new tools for combatting match fixing.

  3. Researching Sport Education Appreciatively

    Science.gov (United States)

    Pill, Shane; Hastie, Peter

    2016-01-01

    In order to plan and enact appropriate learning environments in physical education (PE) teachers are increasingly directed to models based practice. The Sport Education model is one of these models for PE curriculum and teaching design that informs the content and pedagogical direction of sport teaching in PE. Despite Sport Education being well…

  4. Report on Sport 2014

    NARCIS (Netherlands)

    Annet Tiessen-Raaphorst

    2015-01-01

    More than half the Dutch population participated in sport on a weekly basis in 2014. Fitness training and running are the most popular sports among adults. Government interventions at the level of neighbourhoods, primary schools, secondary schools and sports clubs are intended to persuade more

  5. A NACURH White Paper on Residence Hall Government.

    Science.gov (United States)

    Wyatt, Kevin W.; Stoner, Kenneth L.

    1984-01-01

    Presents a white paper on residence hall government, summarizing fundamental principles in organizing and maintaining a residence hall association on campus. These include determining needs, identifying support, obtaining income, ensuring effective leadership, and developing system maintenance. (JAC)

  6. The Refined Lecture Hall Theorem via Abacus Diagrams

    OpenAIRE

    Bradford, Laura; Harris, Meredith; Jones, Brant; Komarinski, Alex; Matson, Carly; O'Shea, Edwin

    2012-01-01

    Bousquet-M\\'elou & Eriksson's lecture hall theorem generalizes Euler's celebrated distinct-odd partition theorem. We present an elementary and transparent proof of a refined version of the lecture hall theorem using a simple bijection involving abacus diagrams.

  7. Bound values for Hall conductivity of heterogeneous medium under ...

    Indian Academy of Sciences (India)

    - ditions in inhomogeneous medium has been studied. It is shown that bound values for. Hall conductivity differ from bound values for metallic conductivity. This is due to the unusual character of current percolation under quantum Hall effect ...

  8. eSport: Construct specifications and implications for sport management

    OpenAIRE

    Cunningham, G.; Fairley, S.; Ferkins, L.; Lock, Daniel; Kerwin, S.; Shaw, S.; Wicker, P.

    2018-01-01

    The purpose of this article is to add to the conceptual discussion on eSport, analyze the role of\\ud eSport within sport management, and suggest avenues for future eSport research. The authors\\ud suggest that debates surround the degree to which eSport represents formal sport, and\\ud disagreements likely stem from conceptualizations of sport and context. Irrespective of one’s\\ud notion of eSport as formal sport, the authors suggest the topic has a place in sport management\\ud scholarship and ...

  9. Relationship between sport commitment and sport consumer behavior

    Directory of Open Access Journals (Sweden)

    Norberta Elisa Fernandes

    2013-12-01

    Full Text Available The purpose of this study was to examine the relationships between sport commitment and three types of sport consumer behaviors: participation frequency, sporting goods and media consumption. A survey was conducted among sport participants of both individual and team sports, fitness and outdoor activities (n= 900. The survey included questions related to demographic information, measures of sport commitment and sport consumption behavior. The results analyzed trough structural equation modeling showed that the sport commitment influences positively the participation frequency, sporting goods consumption and media consumption. Implications of these results are discussed and suggestions for future research on sport consumers are provided.

  10. Ion instabilities in the Hall plasma

    International Nuclear Information System (INIS)

    Gordeev, A.V.; Grechina, A.V.

    1992-01-01

    Instabilities of the Hall plasma are investigated to study the properties of plasma with small ion number per unit length, taking into account ion dynamics and electron mass finiteness. The availability of a universal mechanism resulting in a high two-stream instability with maximum increment of (ω Hi ω He ) 1/2 order is shown

  11. Judicious Leadership for Residence Hall Living.

    Science.gov (United States)

    Gathercoal, Forrest

    This book presents a theory of judicious leadership for residence hall management that advocates the creation of an ethical and educational perspective based on the U.S. Bill of Rights. It argues that by recognizing college students' citizenship rights, providing them an opportunity to experience individual liberties, and helping them to…

  12. Pseudospin anisotropy classification of quantum Hall ferromagnets

    Czech Academy of Sciences Publication Activity Database

    Jungwirth, Tomáš; MacDonald, A. H.

    2000-01-01

    Roč. 63, č. 3 (2000), s. 035305-1 - 035305-9 ISSN 0163-1829 R&D Projects: GA ČR GA202/98/0085 Institutional research plan: CEZ:AV0Z1010914 Keywords : quantum Hall ferromagnets * anisotropy Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 3.065, year: 2000

  13. Anomalous Hall conductivity: Local orbitals approach

    Czech Academy of Sciences Publication Activity Database

    Středa, Pavel

    2010-01-01

    Roč. 82, č. 4 (2010), 045115/1-045115/9 ISSN 1098-0121 Institutional research plan: CEZ:AV0Z10100521 Keywords : anomalous Hall effect * Berry phase correction * orbital polarization momentum Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 3.772, year: 2010

  14. Intrinsic anomalous Hall effect and local polarizabilities

    Czech Academy of Sciences Publication Activity Database

    Středa, Pavel; Jonckheere, T.

    2010-01-01

    Roč. 82, č. 11 (2010), 113303/1-113303/4 ISSN 1098-0121 R&D Projects: GA ČR GA202/08/0551 Institutional research plan: CEZ:AV0Z10100521 Keywords : orbital polarization momentum * Berry phase correction * anomalous Hall effect Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 3.772, year: 2010

  15. Surprises from the spin Hall effect

    Czech Academy of Sciences Publication Activity Database

    Sinova, Jairo; Jungwirth, Tomáš

    2017-01-01

    Roč. 70, č. 7 (2017), s. 39-42 ISSN 0031-9228 Institutional support: RVO:68378271 Keywords : spintronics * spin Hall effect * magnetic recording Subject RIV: BM - Solid Matter Physics ; Magnetism OBOR OECD: Condensed matter physics (including formerly solid state physics, supercond.) Impact factor: 4.188, year: 2016

  16. Chapin Hall Projects and Publications. Autumn 1999.

    Science.gov (United States)

    Chicago Univ., IL. Chapin Hall Center for Children.

    This guide chronicles the ongoing work and writings of the Chapin Hall Center for Children at the University of Chicago, a policy research center dedicated to bringing sound information, rigorous analyses, innovative ideas, and an independent, multidisciplinary perspective to bear on policies and programs affecting children. This guide, organized…

  17. Anomalous Hall effect in disordered multiband metals

    Czech Academy of Sciences Publication Activity Database

    Kovalev, A.A.; Sinova, Jairo; Tserkovnyak, Y.

    2010-01-01

    Roč. 105, č. 3 (2010), 036601/1-036601/4 ISSN 0031-9007 Institutional research plan: CEZ:AV0Z10100521 Keywords : anomalous Hall effect * spintronics Subject RIV: BM - Solid Matter Physics ; Magnetism Impact factor: 7.621, year: 2010

  18. Individualization in a Lecture Hall Setting.

    Science.gov (United States)

    Halyard, Rebecca A.

    A two-quarter Human Anatomy and Physiology course for health-science students has been developed which incorporates the principles of individualization while maintaining the lecture hall setting. The lecture method contributes the following components to the course: (1) no special equipment or supplies; (2) personal interaction between instructor…

  19. line wear debris hall effect sensor

    African Journals Online (AJOL)

    USER

    2013-07-02

    Jul 2, 2013 ... environmental monitoring/control, use of low noise electronic components and method of opposing environmental ... Keywords: Hall Effect, sensor, noise reduction, hysteresis, temperature dependent drift, stability, full scale deflection, ... must conform to available standards and the characteristics must be.

  20. Spin Hall effect on a noncommutative space

    International Nuclear Information System (INIS)

    Ma Kai; Dulat, Sayipjamal

    2011-01-01

    We study the spin-orbital interaction and the spin Hall effect of an electron moving on a noncommutative space under the influence of a vector potential A(vector sign). On a noncommutative space, we find that the commutator between the vector potential A(vector sign) and the electric potential V 1 (r(vector sign)) of the lattice induces a new term, which can be treated as an effective electric field, and the spin Hall conductivity obtains some correction. On a noncommutative space, the spin current and spin Hall conductivity have distinct values in different directions, and depend explicitly on the noncommutative parameter. Once this spin Hall conductivity in different directions can be measured experimentally with a high level of accuracy, the data can then be used to impose bounds on the value of the space noncommutativity parameter. We have also defined a new parameter, σ=ρθ (ρ is the electron concentration, θ is the noncommutativity parameter), which can be measured experimentally. Our approach is based on the Foldy-Wouthuysen transformation, which gives a general Hamiltonian of a nonrelativistic electron moving on a noncommutative space.

  1. Inertial-Hall effect: the influence of rotation on the Hall conductivity

    Directory of Open Access Journals (Sweden)

    Julio E. Brandão

    2015-01-01

    Full Text Available Inertial effects play an important role in classical mechanics but have been largely overlooked in quantum mechanics. Nevertheless, the analogy between inertial forces on mass particles and electromagnetic forces on charged particles is not new. In this paper, we consider a rotating non-interacting planar two-dimensional electron gas with a perpendicular uniform magnetic field and investigate the effects of the rotation in the Hall conductivity. The rotation introduces a shift and a split in the Landau levels. As a consequence of the break of the degeneracy, the counting of the states fully occupied below the Fermi energy increases, tuning the Hall quantization steps. The rotation also changes the quantum Hall plateau widths. Additionally, we find the Hall quantization steps as a function of rotation at a fixed value of the magnetic field.

  2. Chiral heat transport in driven quantum Hall and spin Hall edge states

    Science.gov (United States)

    Arrachea, Liliana; Fradkin, Eduardo

    2012-02-01

    We consider a model for an edge state of electronic systems in the quantum Hall regime with filling ν=1 as well as in the quantum spin Hall regime. In both cases the system is in contact with two reservoirs by tunneling at point contacts. Both systems are locally driven by applying an ac voltage in one of the contacts. By weakly coupling them to a third reservoir, the transport of the generated heat is studied in two different ways: i) when the third reservoir acts as a thermometer the local temperature is sensed, and ii) when the third reservoir acts as a voltage probe the time-dependent local voltage is sensed. Our results indicate a chiral propagation of the heat along the edge in the quantum Hall case and in the quantum spin Hall case (if the injected electrons are spin polarized). The temperature profile shows that electrons along the edge thermalize with the closest upstream reservoir.

  3. Digital technology impacts on the Arnhem transfer hall structural design

    NARCIS (Netherlands)

    Van de Straat, R.; Hofman, S.; Coenders, J.L.; Paul, J.C.

    2015-01-01

    The new Transfer Hall in Arnhem is one of the key projects to prepare the Dutch railways for the increased future demands for capacity. UNStudio developed a master plan in 1996 for the station area of which the completion of the Transfer Hall in 2015 will be a final milestone. The Transfer Hall is a

  4. Magnetoresistance in quantum Hall metals due to Pancharatnam ...

    Indian Academy of Sciences (India)

    We derive the trial Hall resistance formula for the quantum Hall metals to address both the integer and fractional quantum Hall effects. Within the degenerate (and crossed) Landau levels, and in the presence of changing magnetic field strength, one can invoke two physical processes responsible for the electron conduction ...

  5. Magnetoresistance in quantum Hall metals due to Pancharatnam ...

    Indian Academy of Sciences (India)

    Abstract. We derive the trial Hall resistance formula for the quantum Hall metals to address both the integer and fractional quantum Hall effects. Within the degenerate (and crossed) Landau levels, and in the presence of changing magnetic field strength, one can invoke two physical processes responsible for the electron ...

  6. Marketing of sport tourism

    OpenAIRE

    A.S. Teletov; V.I. Karpets

    2015-01-01

    The aim of the article. The aim of the article is to clarify the concept of «sport tourism marketing», to examine the state of its objects and to determine prospects for development of sport tourism in Ukraine. The paper singles out the role of sport in life; compares different types of cities in terms of provision the infrastructure for tourism development in the field of sports. Authors show the example of the campaign. The results of the analysis. The article deals with sport tourism as...

  7. Adventure and Extreme Sports.

    Science.gov (United States)

    Gomez, Andrew Thomas; Rao, Ashwin

    2016-03-01

    Adventure and extreme sports often involve unpredictable and inhospitable environments, high velocities, and stunts. These activities vary widely and include sports like BASE jumping, snowboarding, kayaking, and surfing. Increasing interest and participation in adventure and extreme sports warrants understanding by clinicians to facilitate prevention, identification, and treatment of injuries unique to each sport. This article covers alpine skiing and snowboarding, skateboarding, surfing, bungee jumping, BASE jumping, and whitewater sports with emphasis on epidemiology, demographics, general injury mechanisms, specific injuries, chronic injuries, fatality data, and prevention. Overall, most injuries are related to overuse, trauma, and environmental or microbial exposure. Copyright © 2016 Elsevier Inc. All rights reserved.

  8. SPORTS MARKETING AS A BUSINESS FUNCTION IN MODERN SPORTS

    OpenAIRE

    Danilo Aćimović; Omer Špirtović

    2013-01-01

    Discussion about sport marketing implies its theoretical definition and generalization, and then its actual definition in sport environment. Sport marketing, belongs to the newer type of the marketing. It appeared in time of increasing activity and significance of sport in the world. Huge human potential, with which sport as an activity disposes, implied the need to organize more properly and use it purposefully. “Sport marketing belongs to business function of sport organization and represen...

  9. Sports eyewear protective standards.

    Science.gov (United States)

    Dain, Stephen J

    2016-01-01

    Eye injuries sustained during sport comprise up to 20 per cent of all injuries to the eye serious enough for medical attention to be sought. The prevalence of eye injuries in sport is not easily assessed due to lack of authoritative participation rates, so most studies report total numbers in a time period. The evidence on the proportion of all ocular injuries that are from sport is reviewed. The relative frequencies in different sports are compared in a qualitative manner and the sports with greater numbers of ocular injuries are detailed. In common with occupational injuries to the eye, most sports eye injuries are considered preventable. The hierarchy of action for occupational risk is detailed and adapted to use in a sports scenario. All the available international, regional and national standards on sports eye protection are detailed and their provisions compared. The major function of the standards is to provide adequate protection against the hazard of the sport concerned. These are detailed and compared as a function of energy transfer. Eye protection must not introduce additional or secondary hazards (for instance, fracturing into sharp fragments on impact) and not introduce features that would deter the wearing of eye protection (for instance, restricting field of view to impede playing the sport). The provisions of the standards intended to limit secondary hazards are detailed and compared. The need for future work in standards writing and the activities of the International Standardization Organization in sports eye protection are detailed. © 2016 Optometry Australia.

  10. Sport and migrants' acculturation

    DEFF Research Database (Denmark)

    Morela, Eleftheria

    the acculturation process and to identify factors that may regulate the acculturation process through sport participation. The second study focuses on adolescent migrants and aimed at identifying differences in acculturation attitudes and acculturative stress among young migrants who participate in sports and those...... who do not.Furthermore, it investigates the role of the coach-created sporting environment in the acculturation process within those participating in sport. The results revealed significant differences regarding the level of acculturative stress with migrant participants engaging in sports scoring...... multiculturalism. Sport is considered to be a vehicle for bringing people together, and recently there has been an increasing policy interest in the use of sport as a venue for promoting social integration and intercultural dialogue. Regardless of its political significance, research on the integrative role...

  11. Is Sport Nationalism Justifiable?

    Directory of Open Access Journals (Sweden)

    José Luis Pérez Triviño

    2012-01-01

    Full Text Available The article aims to clarify the deep relationships established between sport and nationalism by considering, among other factors, the instrumentalisation of sport by political elites, political apathy of citizens, economic resources for sport, the question of violence or identitarian matters. In order to define if the combination of sport and nationalism is admissible, the paper defines sport nationalism and distinguishes the political use of sport for purposes of domestic and foreign policy. In the first section the analysis focuses on whether a causal link with respect to the contribution to violence can be established and with respect to its use in the internal politics of a state, the paper differentiates between normal political circumstances and political crises in order to properly address the question of whether there are grounds to assert that sport can distract citizens from asserting their genuine interests.

  12. Technology and Sport

    DEFF Research Database (Denmark)

    Møller, Rasmus Bysted; Møller, Verner

    2015-01-01

    The relationship between sport and technology is close and can be both fruitful and destructive. Technology has a constitutive function in sport as it makes the activity possible and it can enhance performance as well as the sporting experience. The use of football boots is clearly more comfortable...... and effective than playing in bare feet in a game of football. However, sport challenges its athletes by demanding the employment of less efficient means rather than more efficient means in pursuit of sport specific goals. Therefore technology can potentially subtract from the sporting experience and even...... has long been a heated topic and with gene technology waiting around the corner the relationship between sport and technology has become strained and is more and more often viewed as problematic rather than benign. In this chapter we follow up on this trend by exposing what we consider a tendency...

  13. FUNCTION of MANAGEMENT IN SPORT

    Directory of Open Access Journals (Sweden)

    Srećko Novaković

    2011-03-01

    Full Text Available In the sport management coordination represents the basic deposit of management, and terms through numerous activities. Brother-in-law activity in sport has the specific management so speak about the management of sport event, management of sports facilities, management of management to the human activities, financial management in sport etc. The sportively management has presumed the specific management related to sports activities whose basic task of coordinations of sports activities. Management of sport organisations have been confided sport managers of special profile which differs towards the type of sport, rank of contest etc. The sport managers could utter survived the statement that in sport have not been educated special diameters manager, besides sport coaches. Specifically, in the role of manager in sport prevails almost all diameters of professional in professional or the volunteer relationship.

  14. Negative leave balances

    CERN Multimedia

    Human Resources Department

    2005-01-01

    Members of the personnel entitled to annual leave and, where appropriate, saved leave and/or compensatory leave are requested to take note of the new arrangements described below, which were recommended by the Standing Concertation Committee (SCC) at its meeting on 1Â September 2005 and subsequently approved by the Director-General. The changes do not apply to members of the personnel participating in the Progressive Retirement Programme (PRP) or the Part-time Work as a pre-retirement measure, for whom the specific provisions communicated at the time of joining will continue to apply. Â Negative balances in annual leave, saved leave and/or compensatory leave accounts at the end of the leave year (30th September) and on the date on which bonuses are credited to the saved leave account (31st December): Where members of the personnel have a leave account with a negative balance on 30Â September and/or 31Â December, leave will automatically be transferred from one account to another on the relevant dates i...

  15. Negative leave balances

    CERN Multimedia

    Human Resources Department

    2005-01-01

    Members of the personnel entitled to annual leave and, where appropriate, saved leave and/or compensatory leave are requested to take note of the new arrangements described below, which were recommended by the Standing Concertation Committee (SCC) at its meeting on 1 September 2005 and subsequently approved by the Director-General. The changes do not apply to members of the personnel participating in the Progressive Retirement Programme (PRP) or the Part-time Work as a pre-retirement measure, for whom the specific provisions communicated at the time of joining will continue to apply.  Negative balances in annual leave, saved leave and/or compensatory leave accounts at the end of the leave year (30th September) and on the date on which bonuses are credited to the saved leave account (31st December): Where members of the personnel have a leave account with a negative balance on 30 September and/or 31 December, leave will automatically be transferred from one account to another on the relevant dates in or...

  16. THE SPORT MARKETING MANAGEMENT MODEL

    OpenAIRE

    Alexandru Lucian MIHAI

    2015-01-01

    Sport marketing involves marketing fundamentals applied in one industry, the sport business industry. The development of sport marketing fundamentals is therefore based on basic marketing principles. The practice and activities of sport marketing are also based on basic marketing activities, but are modified and adapted to the sport business industry. Therefore, sport marketing is based on its primary and parent discipline - marketing. Sport marketing is one of the most important function...

  17. Diagnostics Systems for Permanent Hall Thrusters Development

    Science.gov (United States)

    Ferreira, Jose Leonardo; Soares Ferreira, Ivan; Santos, Jean; Miranda, Rodrigo; Possa, M. Gabriela

    This work describes the development of Permanent Magnet Hall Effect Plasma Thruster (PHALL) and its diagnostic systems at The Plasma Physics Laboratory of University of Brasilia. The project consists on the construction and characterization of plasma propulsion engines based on the Hall Effect. Electric thrusters have been employed in over 220 successful space missions. Two types stand out: the Hall-Effect Thruster (HET) and the Gridded Ion Engine (GIE). The first, which we deal with in this project, has the advantage of greater simplicity of operation, a smaller weight for the propulsion subsystem and a longer shelf life. It can operate in two configurations: magnetic layer and anode layer, the difference between the two lying in the positioning of the anode inside the plasma channel. A Hall-Effect Thruster-HET is a type of plasma thruster in which the propellant gas is ionized and accelerated by a magneto hydrodynamic effect combined with electrostatic ion acceleration. So the essential operating principle of the HET is that it uses a J x B force and an electrostatic potential to accelerate ions up to high speeds. In a HET, the attractive negative charge is provided by electrons at the open end of the Thruster instead of a grid, as in the case of the electrostatic ion thrusters. A strong radial magnetic field is used to hold the electrons in place, with the combination of the magnetic field and the electrostatic potential force generating a fast circulating electron current, the Hall current, around the axis of the Thruster, mainly composed by drifting electrons in an ion plasma background. Only a slow axial drift towards the anode occurs. The main attractive features of the Hall-Effect Thruster are its simple design and operating principles. Most of the Hall-Effect Thrusters use electromagnet coils to produce the main magnetic field responsible for plasma generation and acceleration. In this paper we present a different new concept, a Permanent Magnet Hall

  18. Sprinters in the Course of a Marathon: Withdrawal from Elite Competitive Sport in Adolescence

    Science.gov (United States)

    Mudrak, Jiri

    2010-01-01

    This paper attempts to explain, using a multi-case study approach, why some young elite athletes, who have shown extraordinary talent in childhood, leave competitive sport in adolescence. Semi-structured interviews were conducted with five young elite athletes who decided to withdraw from elite sport. Interview data were analyzed using the…

  19. SPORTS MARKETING AS A BUSINESS FUNCTION IN MODERN SPORTS

    Directory of Open Access Journals (Sweden)

    Danilo Aćimović

    2013-07-01

    Full Text Available Discussion about sport marketing implies its theoretical definition and generalization, and then its actual definition in sport environment. Sport marketing, belongs to the newer type of the marketing. It appeared in time of increasing activity and significance of sport in the world. Huge human potential, with which sport as an activity disposes, implied the need to organize more properly and use it purposefully. “Sport marketing belongs to business function of sport organization and represents primarily an economical process of connecting production (sport organizations with sportsmen and coaches and consumption (sport and other public. It can be seen in the fact besides promoting sport it conducts certain (limited productive activity (exchange of sport equipment, exchange of sport requisites and material goods that create sport clubs through competitions.

  20. American Medical Society for Sports Medicine recommended sports ultrasound curriculum for sports medicine fellowships.

    Science.gov (United States)

    Finnoff, Jonathan T; Berkoff, David; Brennan, Fred; DiFiori, John; Hall, Mederic M; Harmon, Kimberly; Lavallee, Mark; Martin, Sean; Smith, Jay; Stovak, Mark

    2015-02-01

    The American Medical Society for Sports Medicine (AMSSM) developed a musculoskeletal ultrasound curriculum for sports medicine fellowships in 2010. As the use of diagnostic and interventional ultrasound in sports medicine has evolved, it became clear that the curriculum needed to be updated. Furthermore, the name 'musculoskeletal ultrasound' was changed to 'sports ultrasound' (SPORTS US) to reflect the broad range of diagnostic and interventional applications of ultrasound in sports medicine. This document was created to outline the core competencies of SPORTS US and to provide sports medicine fellowship directors and others interested in SPORTS US education with a guide to create a SPORTS US curriculum. By completing this SPORTS US curriculum, sports medicine fellows and physicians can attain proficiency in the core competencies of SPORTS US required for the practice of sports medicine. Published by the BMJ Publishing Group Limited. For permission to use (where not already granted under a licence) please go to http://group.bmj.com/group/rights-licensing/permissions.

  1. Developing Sport Psychology in a girls' sport academy curriculum

    African Journals Online (AJOL)

    similar Sport Psychology curricula. Keywords: adolescent girls; curriculum; Life Orientation; life skills; sport; sport academy; sport psychology. Introduction. The Academy for Girls' Leadership and ..... context by means of age-appropriate stories and metaphors according to the Sport. Psychology principle of visualisation (cf.

  2. Comparison of eSports and Traditional Sports Consumption Motives

    Science.gov (United States)

    Lee, Donghun; Schoenstedt, Linda J.

    2011-01-01

    With recognition of the need for studying eSports in this interactive digital communication era, this study explored 14 motivational factors affecting the time spent on eSports gaming. Using a sample of 515 college students and athletic event attendees, we further compared eSports game patterns to their non-eSport or traditional sport involvements…

  3. Junior Sport and the Evolution of Sport Cultures.

    Science.gov (United States)

    Siedentop, Daryl

    2002-01-01

    Addresses junior sport and sport culture in New Zealand, recommending that it receive serious consideration for its crucial role in the future of New Zealand's sport culture. The paper presents three goals for junior sport programs (educative, public health, and elite development), describes characteristics of junior sport (e.g., youth want to…

  4. [Sport and rheumatoid arthritis].

    Science.gov (United States)

    Proschek, D; Rehart, S

    2014-06-01

    Sport is becoming increasingly more important in our society. Due to the changing age spectrum with a greater number of elderly and substantially more active people, an increasing number of people with underlying orthopedic diseases are becoming interested in participating in sport. This article deals with the possibilities and effects of sporting activities for people with rheumatoid arthritis within the framework of a conservative therapy. A literature search was carried out using medical search engines, in particular PubMed, and also via the recommendations of specialist societies and patient help groups. The quality of life of patients with rheumatoid arthritis consists of physical, mental and social components. Sport as a means of rehabilitation influences all of these components. Sport should be comprehended as a form of therapy and be adapted to the needs of the individual patient. The willingness to actively participate in sport should always be highly rated and encouraged. Sport is therefore an important pillar of therapy in a conservative total concept. The main aspects of sport therapeutic activities are functional, pedagogical and experience-oriented aspects. The clinical symptoms, extent of damage and physical impairment must, however, be evaluated and taken into consideration for the therapeutic concept. The amount of data on the complex topic of sport and rheumatoid arthritis is low and is mainly dealt with as retrospective reviews. A prospective randomized study basis is lacking. The aim must therefore be to confirm the currently available recommendations for various types of sport in controlled studies.

  5. Neurologic emergencies in sports.

    Science.gov (United States)

    Williams, Vernon B

    2014-12-01

    Sports neurology is an emerging area of subspecialty. Neurologists and non-neurologists evaluating and managing individuals participating in sports will encounter emergencies that directly or indirectly involve the nervous system. Since the primary specialty of sports medicine physicians and other practitioners involved in the delivery of medical care to athletes in emergency situations varies significantly, experience in recognition and management of neurologic emergencies in sports will vary as well. This article provides a review of information and elements essential to neurologic emergencies in sports for the practicing neurologist, although content may be of benefit to readers of varying background and expertise. Both common neurologic emergencies and less common but noteworthy neurologic emergencies are reviewed in this article. Issues that are fairly unique to sports participation are highlighted in this review. General concepts and principles related to treatment of neurologic emergencies that are often encountered unrelated to sports (eg, recognition and treatment of status epilepticus, increased intracranial pressure) are discussed but are not the focus of this article. Neurologic emergencies can involve any region of the nervous system (eg, brain, spine/spinal cord, peripheral nerves, muscles). In addition to neurologic emergencies that represent direct sports-related neurologic complications, indirect (systemic and generalized) sports-related emergencies with significant neurologic consequences can occur and are also discussed in this article. Neurologists and others involved in the care of athletes should consider neurologic emergencies in sports when planning and providing medical care.

  6. The ``cinquefoil" resistive/Hall measurement geometry

    Science.gov (United States)

    Koon, Daniel W.

    2000-03-01

    This talk begins by analyzing the charge transport weighting functions -- the sensitivity of resistive and Hall measurements to local macroscopic inhomogeneities -- of bridge-shaped transport specimens. As expected, such measurements sample only that region of the specimen between the central voltage electrodes, in the limit of narrow current channels connected by even narrower arms to the voltage electrodes. The bridge geometry has a few advantages over the van der Pauw cloverleaf geometry -- including ease in zeroing out the null-field Hall voltage -- but also some disadvantages. The talk concludes with an analysis of a hybrid geometry, the “cinquefoil” or five-leafed clover, which combines the best features of both.

  7. Induced radioisotopes in a linac treatment hall.

    Science.gov (United States)

    Vega-Carrillo, Héctor René; de Leon-Martinez, Héctor Asael; Rivera-Perez, Esteban; Luis Benites-Rengifo, Jorge; Gallego, Eduardo; Lorente, Alfredo

    2015-08-01

    When linacs operate above 8MV an undesirable neutron field is produced whose spectrum has three main components: the direct spectrum due to those neutrons leaking out from the linac head, the scattered spectrum due to neutrons produced in the head that collides with the nuclei in the head losing energy and the third spectrum due to room-return effect. The third category of spectrum has mainly epithermal and thermal neutrons being constant at any location in the treatment hall. These neutrons induce activation in the linac components, the concrete walls and in the patient body. Here the induced radioisotopes have been identified in concrete samples located in the hall and in one of the wedges. The identification has been carried out using a gamma-ray spectrometer. Copyright © 2015 Elsevier Ltd. All rights reserved.

  8. Stuart Hall and Cultural Studies, circa 1983

    Directory of Open Access Journals (Sweden)

    Ann Curthoys

    2017-11-01

    Full Text Available Stuart Hall sought to internationalise theoretical debates and to create Cultural Studies as interdisciplinary. We chart his theoretical journey through a detailed examination of a series of lectures delivered in 1983 and now published for the first time. In these lectures, he discusses theorists such as E.P. Thompson, Raymond Williams, Louis Althusser, Levi Strauss and Antonio Gramsci, and explores the relationship between ideas and social structure, the specificities of class and race, and the legacies of slavery. We note his turn towards metaphors of divergence and dispersal and highlight how autobiographical and deeply personal Hall is in these lectures, especially in his ego histoire moment of traumatic memory recovery.

  9. Theory of fractional quantum hall effect

    International Nuclear Information System (INIS)

    Kostadinov, I.Z.

    1985-08-01

    A theory of the Fractional Quantum Hall Effect is constructed based on magnetic flux fractionization, which lead to instability of the system against selfcompression. A theorem is proved stating that arbitrary potentials fail to lift a specific degeneracy of the Landau level. For the case of 1/3 fractional filling a model 3-particles interaction is constructed breaking the symmetry. The rigid 3-particles wave function plays the role of order parameter. In a BCS type of theory the gap in the single particles spectrum is produced by the 3-particles interaction. The mean field critical behaviour and critical parameters are determined as well as the Ginsburg-Landau equation coefficients. The Hall conductivity is calculated from the first principles and its temperature dependence is found. The simultaneous tunnelling of 3,5,7 etc. electrons and quantum interference effects are predicted. (author)

  10. Music hall Markneukirchen; Musikhalle in Markneukirchen

    Energy Technology Data Exchange (ETDEWEB)

    Anon.

    1996-01-01

    The article presents the new building of the music hall Markneukirchen. From the planned use of the building result very high demands on the ventilation system in order to keep to a sound power level of less than 30 dB(A) in the hall. The building services are dealt with using numerous flowsheets and diagrams: Heat supply, ventilation system, sanitary system, building management, instrumentation and control, electric and lighting systems. (BWI) [Deutsch] Der vorliegende Beitrag stellt den Neubau der Musikhalle Markneukirchen vor. Durch das Nutzungskonzept ergeben sich fuer die Einhaltung eines Schalleistungspegels von weniger als 30 dB(A) im Saalbereich an die Lueftungsanlage sehr hohe Ansprueche. Es werden die raumlufttechnischen Anlagen anhand zahlreicher Flussbilder und Abbildungen vorgestellt: Waermeversorgung, Lueftungstechnik, Sanitaertechnik, Gebaeudeleit- und MSR-Technik, Elektro- und Lichttechnik. (BWI)

  11. Acoustics in rock and pop music halls

    DEFF Research Database (Denmark)

    Adelman-Larsen, Niels Werner; Thompson, Eric Robert; Gade, Anders Christian

    2007-01-01

    The existing body of literature regarding the acoustic design of concert halls has focused almost exclusively on classical music, although there are many more performances of rhythmic music, including rock and pop. Objective measurements were made of the acoustics of twenty rock music venues...... frequency sounds are typically highly amplified, they play an important role in the subjective ratings and the 63-Hz-band must be included in objective measurements and recommendations....

  12. SPS beam to the West Hall

    CERN Multimedia

    CERN PhotoLab

    1976-01-01

    One of the two target stations feeding the West Hall (see Annual Report 1976). After the proton beam was split into three branches, the outer two were directed on to targets in the cast iron shielding box, the centre one passing through the box to another target station downstream. Five different targets could be put in each beam, controlled by the mechanism seen on top.

  13. SERVIR Town Hall - Connecting Space to Village

    Science.gov (United States)

    Limaye, Ashutosh S.; Searby, Nancy D.; Irwin, Daniel; Albers, Cerese

    2013-01-01

    SERVIR, a joint NASA-USAID project, strives to improve environmental decision making through the use of Earth observations, models, and geospatial technology innovations. SERVIR connects these assets with the needs of end users in Mesoamerica, East Africa, and Hindu Kush-Himalaya regions. This Town Hall meeting will engage the AGU community by exploring examples of connecting Space to Village with SERVIR science applications.

  14. Viscoelastic-electromagnetism and Hall viscosity

    OpenAIRE

    Hidaka, Yoshimasa; Hirono, Yuji; Kimura, Taro; Minami, Yuki

    2012-01-01

    We introduce a kind of electromagnetism, which we call viscoelastic-electromagnetism, to investigate viscoelastic transport phenomena. It is shown that Cartan's formalism of general relativity is essential for viscoelastic theory, and then the corresponding electric and magnetic fields are regarded as a velocity gradient and a Burgers vector density, respectively. As an application of this formalism, the Streda formula for the Hall viscosity is obtained.

  15. Acoustics in rock and pop music halls

    DEFF Research Database (Denmark)

    Adelman-Larsen, Niels Werner; Thompson, Eric Robert; Gade, Anders Christian

    2007-01-01

    The existing body of literature regarding the acoustic design of concert halls has focused almost exclusively on classical music, although there are many more performances of rhythmic music, including rock and pop. Objective measurements were made of the acoustics of twenty rock music venues in D...... frequency sounds are typically highly amplified, they play an important role in the subjective ratings and the 63-Hz-band must be included in objective measurements and recommendations....

  16. Industrial steel hall with bridge grane

    OpenAIRE

    Jurejevčič, Nejc

    2016-01-01

    In introduction this diploma thesis describes all main characteristics of (single block)? industrial steel hall with bridge crane. Load arrangement on the supporting structure which covers general actions (snow load and wind action), self-weight and dynamic load of bridge crane was designed with moment resisting frame in transverse direction and frame with concentric diagonal bracing in longitudinual direction. Actions induced by crane bridge was considered in design of runway beam. Steel hal...

  17. Refleksiv Sports Management

    DEFF Research Database (Denmark)

    Adamsen, Billy

    2013-01-01

    Sports management and its development is closely linked to the development of modern society and modern rationality. This article applies sociological theories and practical management philosophy to shed light on how sports management and its rationality in Denmark (Europe) and the United States...... have changed and undergone different phases for more than a century, and to show that, in late modernity, they are entering a new phase in which they seem to be more reflexive and communicative. This trend is evident in American sports management and will also soon be reflected in Danish sports...... management. My analysis of this development will also be based on a specific case study from the American world of sports, namely the story of Oakland Athletics baseball club’s reorganisation in the 1990s, because it both provides a rare insight into a modern sports organisation and demonstrates...

  18. Sport-related concussions

    Directory of Open Access Journals (Sweden)

    Jéssica Natuline Ianof

    Full Text Available ABSTRACT Traumatic brain injury (TBI is a major cause of lifelong disability and death worldwide. Sport-related traumatic brain injury is an important public health concern. The purpose of this review was to highlight the importance of sport-related concussions. Concussion refers to a transient alteration in consciousness induced by external biomechanical forces transmitted directly or indirectly to the brain. It is a common, although most likely underreported, condition. Contact sports such as American football, rugby, soccer, boxing, basketball and hockey are associated with a relatively high prevalence of concussion. Various factors may be associated with a greater risk of sport-related concussion, such as age, sex, sport played, level of sport played and equipment used. Physical complaints (headache, fatigue, dizziness, behavioral changes (depression, anxiety, irritability and cognitive impairment are very common after a concussion. The risk of premature return to activities includes the prolongation of post-concussive symptoms and increased risk of concussion recurrence.

  19. NANOTECHNOLOGY AND SPORT

    Directory of Open Access Journals (Sweden)

    Zoran Mašić

    2010-03-01

    Full Text Available We can say that sports are continuously evolving. To improve the quality of this work, changes are being made in all of these segments: development and selection of athletes, the improvement of technology for preparation and performance tactics, training methods for relaxation. On the other hand these are followed by rule changes, modern sports facilities, as well as legal regulations. One direction in the improvement of sports results is an attempt at rational spending of existing resources for athletes, regardless of whether in team or individual sports. Nanotechnology is also contributioning toward this direction. This paper points out the appearance of nanotechnology, its essence, i.e., the way it may effect the development of sports. Of course, it also points to the potential risk of applying nanotechnology to sports.

  20. Ethics in sports medicine.

    Science.gov (United States)

    Dunn, Warren R; George, Michael S; Churchill, Larry; Spindler, Kurt P

    2007-05-01

    Physicians have struggled with the medical ramifications of athletic competition since ancient Greece, where rational medicine and organized athletics originated. Historically, the relationship between sport and medicine was adversarial because of conflicts between health and sport. However, modern sports medicine has emerged with the goal of improving performance and preventing injury, and the concept of the "team physician" has become an integral part of athletic culture. With this distinction come unique ethical challenges because the customary ethical norms for most forms of clinical practice, such as confidentiality and patient autonomy, cannot be translated easily into sports medicine. The particular areas of medical ethics that present unique challenges in sports medicine are informed consent, third parties, advertising, confidentiality, drug use, and innovative technology. Unfortunately, there is no widely accepted code of sports medicine ethics that adequately addresses these issues.

  1. SPORTS ACTIVITIES SPONSORSHIP

    Directory of Open Access Journals (Sweden)

    DURBĂCEA - BOLOVAN MARIAN

    2017-12-01

    Full Text Available Sports and economy have discovered each other, hoping to serve common interests. In view of transferring in a more efficient way the information about their products or services to consumers, the business operator finances sports activities for advertising purposes. A company involved in sports sponsorship can instantly transmit the message about its products to millions of potential buyers, thus increasing the market share and hence the profit that it generates. By sponsoring sport it is meant any agreement / convention, under which one party the sponsor makes available to the beneficiary the material resources, financial and / or other benefits in exchange for its association with a sport or sportsman and especially the promise to use this association with sport or sportsman for the purpose of advertising, especially TV advertising. The growing use of athletes as spokespersons for a product is largely due to the ability of athletes to attract public attention and the credibility they enjoy.

  2. Anode Fall Formation in a Hall Thruster

    International Nuclear Information System (INIS)

    Dorf, Leonid A.; Raitses, Yevgeny F.; Smirnov, Artem N.; Fisch, Nathaniel J.

    2004-01-01

    As was reported in our previous work, accurate, nondisturbing near-anode measurements of the plasma density, electron temperature, and plasma potential performed with biased and emissive probes allowed the first experimental identification of both electron-repelling (negative anode fall) and electron-attracting (positive anode fall) anode sheaths in Hall thrusters. An interesting new phenomenon revealed by the probe measurements is that the anode fall changes from positive to negative upon removal of the dielectric coating, which appears on the anode surface during the course of Hall thruster operation. As reported in the present work, energy dispersion spectroscopy analysis of the chemical composition of the anode dielectric coating indicates that the coating layer consists essentially of an oxide of the anode material (stainless steel). However, it is still unclear how oxygen gets into the thruster channel. Most importantly, possible mechanisms of anode fall formation in a Hall thruster with a clean and a coated anodes are analyzed in this work; practical implication of understanding the general structure of the electron-attracting anode sheath in the case of a coated anode is also discussed

  3. Sport accidents in childhood.

    OpenAIRE

    Sahlin, Y

    1990-01-01

    Injuries among children during sporting activities are common. This study is a one year study including children between five and fourteen years of age who sustained their injuries during sporting activities and were treated at Trondheim Regional and University Hospital. Sport accidents account for 27 per cent of all childhood accidents in this age group. Fifty-three per cent of the injured were boys, and 47 per cent were girls. The boys sustained more severe injuries than the girls. Soccer c...

  4. Sports Specialization, Part II

    Science.gov (United States)

    Myer, Gregory D.; Jayanthi, Neeru; DiFiori, John P.; Faigenbaum, Avery D.; Kiefer, Adam W.; Logerstedt, David; Micheli, Lyle J.

    2016-01-01

    Context: Many coaches, parents, and children believe that the best way to develop elite athletes is for them to participate in only 1 sport from an early age and to play it year-round. However, emerging evidence to the contrary indicates that efforts to specialize in 1 sport may reduce opportunities for all children to participate in a diverse year-round sports season and can lead to lost development of lifetime sports skills. Early sports specialization may also reduce motor skill development and ongoing participation in games and sports as a lifestyle choice. The purpose of this review is to employ the current literature to provide evidence-based alternative strategies that may help to optimize opportunities for all aspiring young athletes to maximize their health, fitness, and sports performance. Evidence Acquisition: Nonsystematic review with critical appraisal of existing literature. Study Design: Clinical review. Level of Evidence: Level 4. Conclusion: Based on the current evidence, parents and educators should help provide opportunities for free unstructured play to improve motor skill development and youth should be encouraged to participate in a variety of sports during their growing years to influence the development of diverse motor skills. For those children who do choose to specialize in a single sport, periods of intense training and specialized sport activities should be closely monitored for indicators of burnout, overuse injury, or potential decrements in performance due to overtraining. Last, the evidence indicates that all youth should be involved in periodized strength and conditioning (eg, integrative neuromuscular training) to help them prepare for the demands of competitive sport participation, and youth who specialize in a single sport should plan periods of isolated and focused integrative neuromuscular training to enhance diverse motor skill development and reduce injury risk factors. Strength of Recommendation Taxonomy (SORT): B. PMID

  5. SPORT MARKETING MIX STRATEGIES

    OpenAIRE

    Alexandru Lucian MIHAI

    2013-01-01

    This paper presents a brief overview of a significant element of the sport marketing management model called the marketing mix. The marketing mix is crucial because it defines the sport business, and much of the sport marketer’s time is spent on various functions within the marketing mix. The marketing mix is the strategic combination of the product, price, place and promotion elements. These elements are typically called the four Ps of marketing. Decisions and strategies for each are importa...

  6. SportOn

    OpenAIRE

    Lynghøj, Jesper Ebbesen; Holm, Emil Broo

    2016-01-01

    Abstract More than ever, it is possible for individuals to create or get involved in some kind of public debate on digital platforms. Whether it involves politics or sport events, people have the opportunity to comment on these events via social media platforms. Our thesis focus on creating a concept, where both journalists and users of sports journalistic can participate online, and share the sports stories they are passionated about. We look at the possibilities of making a sportssite, w...

  7. Sport-related concussions

    OpenAIRE

    Ianof, Jéssica Natuline; Freire, Fabio Rios; Calado, Vanessa Tomé Gonçalves; Lacerda, Juliana Rhein; Coelho, Fernanda; Veitzman, Silvia; Schmidt, Magali Taino; Machado, Sergio; Velasques, Bruna; Ribeiro, Pedro; Basile, Luis Fernando Hindi; Paiva, Wellingson Silva; Amorim, Robson; Anghinah, Renato

    2014-01-01

    ABSTRACT Traumatic brain injury (TBI) is a major cause of lifelong disability and death worldwide. Sport-related traumatic brain injury is an important public health concern. The purpose of this review was to highlight the importance of sport-related concussions. Concussion refers to a transient alteration in consciousness induced by external biomechanical forces transmitted directly or indirectly to the brain. It is a common, although most likely underreported, condition. Contact sports such...

  8. Spinal injury in sport

    Energy Technology Data Exchange (ETDEWEB)

    Barile, Antonio [Department of Radiology, University of L' Aquila, S. Salvatore Hospital, Via Vetoio, Coppito, 67100 L' Aquila (Italy)]. E-mail: antonio.barile@cc.univaq.it; Limbucci, Nicola [Department of Radiology, University of L' Aquila, S. Salvatore Hospital, Via Vetoio, Coppito, 67100 L' Aquila (Italy); Splendiani, Alessandra [Department of Radiology, University of L' Aquila, S. Salvatore Hospital, Via Vetoio, Coppito, 67100 L' Aquila (Italy); Gallucci, Massimo [Department of Radiology, University of L' Aquila, S. Salvatore Hospital, Via Vetoio, Coppito, 67100 L' Aquila (Italy); Masciocchi, Carlo [Department of Radiology, University of L' Aquila, S. Salvatore Hospital, Via Vetoio, Coppito, 67100 L' Aquila (Italy)

    2007-04-15

    Spinal injuries are very common among professional or amateur athletes. Spinal sport lesions can be classified in overuse and acute injuries. Overuse injuries can be found after years of repetitive spinal load during sport activity; however specific overuse injuries can also be found in adolescents. Acute traumas are common in contact sports. Most of the acute injuries are minor and self-healing, but severe and catastrophic events are possible. The aim of this article is to review the wide spectrum of spinal injuries related to sport activity, with special regard to imaging finding.

  9. Sports Diplomacy of Norway

    Directory of Open Access Journals (Sweden)

    Kobierecki Michał Marcin

    2017-12-01

    Full Text Available Norway is perceived as a country with a clear international identity. The aim of the article is to investigate the sports diplomacy of Norway and to examine its influence on the international brand of this country. The author will define the term “sports diplomacy” and attempt to outline the strategy of Norway’s public diplomacy; an analysis of the methods used in Norwegian sports diplomacy will follow. The main hypothesis of this paper is that sports diplomacy only plays a subsidiary role in Norwegian nation branding.

  10. Spinal injury in sport

    International Nuclear Information System (INIS)

    Barile, Antonio; Limbucci, Nicola; Splendiani, Alessandra; Gallucci, Massimo; Masciocchi, Carlo

    2007-01-01

    Spinal injuries are very common among professional or amateur athletes. Spinal sport lesions can be classified in overuse and acute injuries. Overuse injuries can be found after years of repetitive spinal load during sport activity; however specific overuse injuries can also be found in adolescents. Acute traumas are common in contact sports. Most of the acute injuries are minor and self-healing, but severe and catastrophic events are possible. The aim of this article is to review the wide spectrum of spinal injuries related to sport activity, with special regard to imaging finding

  11. Leave Your Ego at the Door’: A Narrative Investigation into Effective Wingsuit Flying

    Science.gov (United States)

    Arijs, Cedric; Chroni, Stiliani; Brymer, Eric; Carless, David

    2017-01-01

    In recent years there has been a rapid growth in interest in extreme sports. For the most part research has focused on understanding motivations for participation in extreme sports and very little research has attempted to investigate the psychological structure of effective performance. Those few studies that have attempted to explore this issue have tested models designed for traditional sport on adventure sports. However, extreme sports are not the same as adventure sports or traditional sports. This study employed a narrative approach to investigate experiences of effective performance in the extreme sport of proximity wingsuit flying. An overarching theme we labeled ‘leave your ego at the door,’ emerged based on four sub-themes: (1) know thy self, (2) know thy skills, (3) know the environment now, and (4) tame the ‘inner animal.’ These themes are presented and discussed in relation to performance and discovery narratives identified within elite sport, thereby shedding light on how participants’ experiences of the extreme sport of proximity wingsuit flying differ from dominant stories within traditional sports. PMID:29204131

  12. Leave Your Ego at the Door’: A Narrative Investigation into Effective Wingsuit Flying

    Directory of Open Access Journals (Sweden)

    Cedric Arijs

    2017-11-01

    Full Text Available In recent years there has been a rapid growth in interest in extreme sports. For the most part research has focused on understanding motivations for participation in extreme sports and very little research has attempted to investigate the psychological structure of effective performance. Those few studies that have attempted to explore this issue have tested models designed for traditional sport on adventure sports. However, extreme sports are not the same as adventure sports or traditional sports. This study employed a narrative approach to investigate experiences of effective performance in the extreme sport of proximity wingsuit flying. An overarching theme we labeled ‘leave your ego at the door,’ emerged based on four sub-themes: (1 know thy self, (2 know thy skills, (3 know the environment now, and (4 tame the ‘inner animal.’ These themes are presented and discussed in relation to performance and discovery narratives identified within elite sport, thereby shedding light on how participants’ experiences of the extreme sport of proximity wingsuit flying differ from dominant stories within traditional sports.

  13. The Temporary Leave Dilemma -

    DEFF Research Database (Denmark)

    Amilon, Anna

    2010-01-01

    Lone mothers have to take care of a sick child with little or no help from the child’s other parent and have to carry all costs connected to leave-taking. This paper empirically tests whether lone mothers take more temporary parental leave to care for sick children than partnered mothers and whet...

  14. Design and Production of Trophies for Selected Sports and Games ...

    African Journals Online (AJOL)

    Design and production of trophies for games and sports particularly in a form of metal art has been in existence for so many years. Presently they are practiced with much improvement and modern technology as compared to the ancient times where leaves, horns and other objects were used as trophies to award warriors ...

  15. Hall viscosity: A link between quantum Hall systems, plasmas and liquid crystals

    Energy Technology Data Exchange (ETDEWEB)

    Lingam, Manasvi, E-mail: manasvi@physics.utexas.edu

    2015-07-17

    In this Letter, the assumption of two simple postulates is shown to give rise to a Hall viscosity term via an action principle formulation. The rationale behind the two postulates is clearly delineated, and the connections to an intrinsic angular momentum are emphasized. By employing this methodology, it is shown that Hall viscosity appears in a wide range of fields, and the interconnectedness of quantum Hall systems, plasmas and nematic liquid crystals is hypothesized. Potential avenues for experimental and theoretical work arising from this cross-fertilization are also indicated. - Highlights: • Connections between simple 2D fluid models in different fields of physics presented. • Structure emerges via varied physical mechanisms driven by internal angular momentum. • Properties of these models such as Casimirs, equilibria and stability are analyzed.

  16. Guide to Eating for Sports

    Medline Plus

    Full Text Available ... sports than chowing down on carbs or chugging sports drinks. The good news is that eating to reach ... in sweat can usually be made up with sports drinks or food eaten after exercise. Ditch Dehydration Speaking ...

  17. Treating and Preventing Sports Hernias

    Science.gov (United States)

    ... Close ‹ Back to Healthy Living Treating and Preventing Sports Hernias If you play ice hockey, tennis or ... for the most commonly misdiagnosed groin pain—a sports hernia. A sports hernia often results from overuse ...

  18. Guide to Eating for Sports

    Medline Plus

    Full Text Available ... For Kids For Parents MORE ON THIS TOPIC Nutrition & Fitness Center Sports Physicals Figuring Out Fat and Calories Sports Center Vitamins and Minerals Sports Supplements Female Athlete Triad Contact ...

  19. Sport and male sexuality.

    Science.gov (United States)

    Sgrò, P; Di Luigi, L

    2017-09-01

    The relationships between sport and sexuality in males are of great social and clinical interest, because of sports and motor activities that highly promote social and sexual relationships. Even if few literature exist, two main questions should be taken into account: whether and how physical exercise and sport positively or negatively influence sexual health and behavior and/or whether and how sexual behavior may affect a sub-sequent sport performance. Physical exercise and sport per se can influence, positively or negatively, the hypothalamic-pituitary-testicular axis function and, consequently, the individual's reproductive and/or sexual health. This depends on individual factors such as genetic and epigenetic ones and on different variables involved in the practice of sport activities (type of sport, intensity and duration of training, doping and drug use and abuse, nutrition, supplements, psychological stress, allostatic load, etc.). If well conducted, motor and sport activities could have beneficial effects on sexual health in males. Among different lifestyle changes, influencing sexual health, regular physical activity is fundamental to antagonize the onset of erectile dysfunction (ED). However, competitive sport can lead both reproductive and/or sexual tract damages and dysfunctions, transient (genital pain, hypoesthesia of the genitalia, hypogonadism, DE, altered sexual drive, etc.) or permanent (hypogonadism, DE, etc.), by acting directly (traumas of the external genitalia, saddle-related disorders in cyclists, etc.) or indirectly (exercise-related hypogonadism, drug abuse, doping, stress, etc.). Sexual activities shortly performed before a sport competition could differently influence sport performance. Due to the few existing data, it is advisable to avoid an absolute pre-competition sexual abstinence.

  20. Sports medicine in New Zealand.

    OpenAIRE

    Milne, C J

    1992-01-01

    Sports medicine in New Zealand is characterized by a team approach. Experienced professionals work together to the benefit of athletes, be they elite performers or those in sport for purely recreational purposes. A no-fault accident compensation scheme is used to provide speedy access to treatment services for those injured in sport and also for advice on accident prevention. Recent initiatives include a task force on drugs in sport and the creation of regional sports foundations. Sports medi...

  1. Sports Specialization in Young Athletes

    OpenAIRE

    Jayanthi, Neeru; Pinkham, Courtney; Dugas, Lara; Patrick, Brittany; LaBella, Cynthia

    2013-01-01

    Context: Sports specialization is intense training in 1 sport while excluding others. Sports specialization in early to middle childhood has become increasingly common. While most experts agree that some degree of sports specialization is necessary to achieve elite levels, there is some debate as to whether such intense practice time must begin during early childhood and to the exclusion of other sports to maximize potential for success. There is a concern that sports specialization before ad...

  2. Olympic Information in the SPORT Database.

    Science.gov (United States)

    Belna, Alison M.; And Others

    1984-01-01

    Profiles the SPORT database, produced by Sport Information Resource Centre, Ottawa, Ontario, which provides extensive coverage of individual sports including practice, training and equipment, recreation, sports medicine, physical education, sport facilities, and international sport history. Olympic coverage in SPORT, sports sciences, online…

  3. Youth Sports Safety Statistics

    Science.gov (United States)

    ... Hemecourt P, Collins C, Comstock RD. Assessment and management of sport-related concussions in United States high schools. Am ... KE, Xu L, McGuire LC, Coronado VG. Nonfatal sports and recreation related traumatic brain injuries ... NT. Diagnosis and management of exercise-induced asthma. Physician Sportsmed. 1996;24( ...

  4. Subarachnoid Haemorrhage and Sports.

    Science.gov (United States)

    Sousa Nanji, Liliana; Melo, Teresa P; Canhão, Patrícia; Fonseca, Ana Catarina; Ferro, José Manuel

    2015-01-01

    Some cases of subarachnoid haemorrhage (SAH) have been associated with vigorous physical activity, including sports. Our research aimed to describe the association between SAH and sports and to identify the types of sports that were more frequently found as precipitating factors in a tertiary single-centre SAH register. We retrieved information from a prospectively collected SAH registry and reviewed discharge notes of acute SAH patients admitted to the Stroke Unit of Hospital de Santa Maria, Lisbon, between 1995 and 2014. Out of 738 patients included in the analysis, 424 (57.5%) cases of SAH were preceded by physical activity. Nine cases (1.2%) were associated with sports, namely running (2 cases), aerobics (2 cases), cycling, body balance, dance, surf and windsurf. Patients with SAH while practicing sports were younger than controls (average age 43.1 vs. 57.0 years; p = 0.007). In 1 patient, there was a report of trauma to the neck. Patients in the sports group only had Hunt and Hess scale grades 1 (11.1%) or 2 (88.9%) at admission, while patients in the control group had a wider distribution in severity. Our findings indicate that SAH precipitated by sports is not very frequent and is uncommonly related to trauma. Patients who suffered SAH associated with sports were younger and apparently had a milder clinical presentation.

  5. Sports: Art or Violence?

    Science.gov (United States)

    Intercom, 1977

    1977-01-01

    The lesson plan for grades six through nine demonstrates an innovative way of analyzing student ideas and attitudes about sports activity. It includes readings, photographs, and teacher suggestions designed to generate ideas and reactions to personal and social aspects of sports. (Author/DB)

  6. Prevent Children's Sports Injuries.

    Science.gov (United States)

    Micheli, Lyle J.

    1983-01-01

    Children who actively take part in sports are susceptible to special injury risks because their bodies are still growing. Parents should keep both the child's individual physical and emotional makeup and the demands of the sport in mind when selecting an activity. Proper training methods and equipment are discussed. (PP)

  7. Back pain and sports

    Science.gov (United States)

    ... and a sense of well-being. Almost any sport places some stress on your spine. That is why it's important to keep the muscles and ligaments that support your spine flexible ... many sports injuries. Getting these muscles to the point where ...

  8. Listening to Sports Idioms.

    Science.gov (United States)

    Wirkus, Tom; Bohlken, Bob

    In the book, "Talking from 9 to 5," Deborah Tannen suggests that females have difficulty listening to males in the workplace because of the masculine inclination to talk sports the majority of the time. Men use sports idioms, metaphors, and cliches, making business a "peculiar language" which excludes "naive"…

  9. Sport, Religion and Charisma

    DEFF Research Database (Denmark)

    Møller, Verner

    2017-01-01

    Since the end of the Second World War, the popularity of modern elite sport has grown immensely and so has the economical interests in sport. Athletes have become attractive advertising partners. Much money is at stake so it is understandable that companies are alarmed when their poster boys or g...

  10. Concussion in Sports

    Science.gov (United States)

    ACSM Information On… Concussion in Sports A concussion is an injury to the brain where force causes the brain to move within the skull. A person does ... deceleration force, and concussions occur in many different sports. While an athlete does not need to hit ...

  11. Sport and Social Inequalities

    NARCIS (Netherlands)

    Spaaij, R.; Farquharson, K.; Marjoribanks, T.

    2015-01-01

    This article reviews recent research on the relationship between sport and social inequalities, focusing on gender, race, nation and social mobility. Through an engagement with these areas of research, we highlight how sport reflects and reinforces broader hierarchical structures; how it serves as a

  12. Sports Dehydration Safety Tips

    Science.gov (United States)

    Sports Dehydration Safety Tips Everything you need to know to keep your kids safe from dehydration when playing sports. To keep kids in top ... to stay hydrated by drinking plenty of fluids. Dehydration occurs when a body loses more water than ...

  13. Somatotypes in Sport

    Directory of Open Access Journals (Sweden)

    Tóth Teodor

    2014-03-01

    Full Text Available The submitted article deals with the evaluation of the somatotype of persons and determination of a suitable somatotype for selected sports. In the introduction the method for determining and evaluating a somatotype according to Carter and Heath is characterised. The processes used for calculating the individual components - endomorphy, mesomorphy, ectomorphy - are presented as well as a description of these elements. The calculated components are subsequently put into a somatograph. The evaluation of a somatotype is of great benefit and offers a guideline with the selection of sporting activities; it subsequently helps assign athletes into a suitable position where they will be able to best develop their talents in view of their bodily construction. In this work two types of sports are evaluated - basketball and bodybuilding. With each sport the measurements which give the prerequisites for the given sport are presented. The selection of the presented sports was made with regard to the different requirements and demands in the scope of bodily constitution. The aim of the presented paper is to assess physical parameters of subjects groups in relation to selected sports (basketball and bodybuilding. Based on the body constitution to determine the conditions for developing the physical condition and success in the appointed sports. Another objective is to compare the rating form and equation methods for somatotype determination. The sample consist 32 subjects with age between 22-28 years of both sexes, who are dedicated to basketball, or bodybuilding at amateur level.

  14. Computer vision for sports

    DEFF Research Database (Denmark)

    Thomas, Graham; Gade, Rikke; Moeslund, Thomas B.

    2017-01-01

    The world of sports intrinsically involves fast and accurate motion that is not only challenging for competitors to master, but can be difficult for coaches and trainers to analyze, and for audiences to follow. The nature of most sports means that monitoring by the use of sensors or other devices...

  15. Sports Subsidies Soar. Commentary

    Science.gov (United States)

    Toma, J. Douglas

    2010-01-01

    Doug Lederman's article, "Sports Subsidies Soar," discusses the issue on institutional subsidies for sports program. His article invites an obvious question: why are so many universities willing to subsidize athletics through either a direct transfer of institutional funds, assessing a dedicated student fee, or a combination of these? This…

  16. Eating Disorders and Sports.

    Science.gov (United States)

    Moriarty, Dick; Moriarty, Mary

    Since sports can sometimes lend themselves to eating disorders, coaches and sports administrators must get involved in the detection and treatment of this problem. While no reliable studies or statistics exist on the incidence of anorexia nervosa and/or bulimia among athletes, some research suggests that such disorders occur frequently among…

  17. Sport, mindfulness en boeddhisme

    NARCIS (Netherlands)

    Jan de Leeuw

    2016-01-01

    Binnenkort gaat in Nederland een Academie voor Mindfulness in Sport (AMS) van start. Dat is een techniek die ingezet wordt voor bewustwording van eigen gevoelens en gedachten van het moment, zonder daar op te reageren. Een beroemdheid uit de wereld van de sport die zweert bij mindfulness is Phil

  18. Christianity and sport

    Directory of Open Access Journals (Sweden)

    Gojković Goran

    2017-01-01

    Full Text Available In this paper we will demonstrate, relying on theology, that Christianity, i.e. ascetic experience of the Church and sport are two sides of the same coin which is reflected in community or, rather, communion (When Christianity is concerned, or team work towards the goal when it comes to sport.

  19. Mathematics and Sports

    Indian Academy of Sciences (India)

    nal stereotype of a mathematician is a highly nonathletic, myopic individual with his head buried in books. Reality, of course, is other- wise. One finds many who are proficient in both mathematics and sports, but even so, rarely there's someone who combines the two. Mathematics in sports? Certainly. Tendulkar does not ...

  20. Sports-related concussions.

    Science.gov (United States)

    Conder, Robert L; Conder, Alanna A

    2015-04-01

    Concussions are an inherent part of collision sports such as football and soccer. As a subset of traumatic brain injury, concussions are neurometabolic events that cause transient neurologic dysfunction. Following a concussion, some athletes require longer neurologic recovery than others. Education and intervention aimed at prevention and management can minimize the long-term sequelae of sports-related concussions.

  1. Commemorative Symposium on the Hall Effect and its Applications

    CERN Document Server

    Westgate, C

    1980-01-01

    In 1879, while a graduate student under Henry Rowland at the Physics Department of The Johns Hopkins University, Edwin Herbert Hall discovered what is now universally known as the Hall effect. A symposium was held at The Johns Hopkins University on November 13, 1979 to commemorate the lOOth anniversary of the discovery. Over 170 participants attended the symposium which included eleven in­ vited lectures and three speeches during the luncheon. During the past one hundred years, we have witnessed ever ex­ panding activities in the field of the Hall effect. The Hall effect is now an indispensable tool in the studies of many branches of condensed matter physics, especially in metals, semiconductors, and magnetic solids. Various components (over 200 million!) that utilize the Hall effect have been successfully incorporated into such devices as keyboards, automobile ignitions, gaussmeters, and satellites. This volume attempts to capture the important aspects of the Hall effect and its applications. It includes t...

  2. Nonlinearity in the effect of an inhomogeneous Hall angle

    Science.gov (United States)

    Koon, Daniel W.

    2007-03-01

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

  3. EPIDEMIOLOGY OF PEDIATRIC SPORTS INJURIES: INDIVIDUAL SPORTS

    Directory of Open Access Journals (Sweden)

    Dennis J. Caine

    2005-06-01

    Full Text Available The objective of the book is to review comprehensively what is known about the distribution and determinants of injury rates in a variety of individual sports, and to suggest injury prevention measures and guidelines for further research. This book provides comprehensive compilation and critical analysis of epidemiological data over children's individual sports: including equestrian, gymnastics, martial arts, skiing and snowboarding, tennis, track and field, and wrestling. This book encourages coaches and sports administrators to discuss rules, equipment standards, techniques, and athlete conditioning programs. In turn, they can inform parents about the risks and how they can help their children avoid or limit injury in sports. A common, uniform strategy and evidence-based approach to organizing and interpreting the literature is used in all chapters. All the sports-specific chapters are laid out with the same basic headings, so that it is easy for the reader to find common information across chapters. Chapter headings are: 1 Epidemiology of children's individual sports injuries, 2 Equestrian injuries, 2 Gymnastics injuries, 3 Martial arts injuries, 4 Skiing and snowboard injuries, 5 Tennis injuries, 6 Track and field injuries, 7 Wrestling injuries, 8 Injury prevention and future research. Chapter headings include: i Incidence of injury, ii Injury characteristics, iii Injury severity, iv njury risk factors, v Suggestions for injury prevention, vi Suggestions for further research. In each sports-specific chapter, an epidemiological picture has been systematically developed from the data available in prospective cohort, retrospective cohort, case-control, and cross-sectional studies. The tables are numerous, helpful and very useful. The book provides a very useful resource for sport scientist, pediatricians, family practitioners and healthcare professionals in the field of child and adolescent injury and prevention The readers are going to

  4. Performance of a Cylindrical Hall-Effect Thruster with Magnetic Field Generated by Permanent Magnets

    Science.gov (United States)

    Polzin, Kurt A.; Raitses, Yevgeny; Fisch, Nathaniel J.

    2008-01-01

    While Hall thrusters can operate at high efficiency at kW power levels, it is difficult to construct one that operates over a broad envelope down to 100W while maintaining an efficiency of 45- 55%. Scaling to low power while holding the main dimensionless parameters constant requires a decrease in the thruster channel size and an increase in the magnetic field strength. Increasing the magnetic field becomes technically challenging since the field can saturate the miniaturized inner components of the magnetic circuit and scaling down the magnetic circuit leaves very little room for magnetic pole pieces and heat shields. An alternative approach is to employ a cylindrical Hall thruster (CHT) geometry. Laboratory model CHTs have operated at power levels ranging from the order of 50 Watts up to 1 kW. These thrusters exhibit performance characteristics which are comparable to conventional, annular Hall thrusters of similar size. Compared to the annular Hall thruster, the CHT has a lower insulator surface area to discharge chamber volume ratio. Consequently, there is the potential for reduced wall losses in the channel of a CHT, and any reduction in wall losses should translate into lower channel heating rates and reduced erosion. This makes the CHT geometry promising for low-power applications. Recently, a CHT that uses permanent magnets to produce the magnetic field topology was tested. This thruster has the promise of reduced power consumption over previous CHT iterations that employed electromagnets. Data are presented for two purposes: to expose the effect different controllable parameters have on the discharge and to summarize performance measurements (thrust, Isp, efficiency) obtained using a thrust stand. These data are used to gain insight into the thruster's operation and to allow for quantitative comparisons between the permanent magnet CHT and the electromagnet CHT.

  5. Overview of sports vision

    Science.gov (United States)

    Moore, Linda A.; Ferreira, Jannie T.

    2003-03-01

    Sports vision encompasses the visual assessment and provision of sports-specific visual performance enhancement and ocular protection for athletes of all ages, genders and levels of participation. In recent years, sports vision has been identified as one of the key performance indicators in sport. It is built on four main cornerstones: corrective eyewear, protective eyewear, visual skills enhancement and performance enhancement. Although clinically well established in the US, it is still a relatively new area of optometric specialisation elsewhere in the world and is gaining increasing popularity with eyecare practitioners and researchers. This research is often multi-disciplinary and involves input from a variety of subject disciplines, mainly those of optometry, medicine, physiology, psychology, physics, chemistry, computer science and engineering. Collaborative research projects are currently underway between staff of the Schools of Physics and Computing (DIT) and the Academy of Sports Vision (RAU).

  6. Sports: The Infectious Hazards.

    Science.gov (United States)

    Minooee, Arezou; Wang, Jeff; Gupta, Geeta K

    2015-10-01

    Although the medical complications of sports are usually traumatic in nature, infectious hazards also arise. While blood-borne pathogens such as HIV, hepatitis B, and hepatitis C, cause significant illness, the risk of acquiring these agents during sporting activities is minimal. Skin infections are more commonplace, arising from a variety of microbial agents including bacterial, fungal, and viral pathogens. Sports involving water contact can lead to enteric infections, eye infections, or disseminated infections such as leptospirosis. Mumps, measles, and influenza are vaccine-preventable diseases that have been transmitted during sporting events, both in players and in spectators. Prevention is the key to many of these infections. Players should be vaccinated and should not participate in sports if their infection can be spread by contact, airborne, or droplet transmission.

  7. Policy, Sport and Integration

    DEFF Research Database (Denmark)

    Agergaard, Sine; Sørensen, Jan Kahr

    2010-01-01

    in sport, although sports clubs do get economic support and are seen as having the potential to solve crucial social issues. The purpose of this article is to analyse and discuss the ways in which the political assumption that sport can enhance social integration is reflected in the practical governance......Increased public funding, more governmental involvement and an emphasis on the instrumental values of physical activities have in general become characteristic of Western nations’ policies towards sport. Denmark is, however, a little different in that there is still little political intervention...... of integration issues in particular in sports clubs. The article is based on a local field study in which we interviewed 10 talented football players with ethnic minority backgrounds and eight coaches and club leaders from six different football clubs. Distinguishing between integration and assimilation...

  8. Effect of Imagination on Sport Achievements of Novice Soccer Players

    Directory of Open Access Journals (Sweden)

    Aleksandra E. Gorovaya

    2011-01-01

    Full Text Available This article describes the connection between the use of types of mental imagery by athletes and the level of their imagination. Taking the model of imagery use suggested by K. Martin, S. Moritz and С Hall, the authors used a Russian version of "The Sport Imagery Questionnaire" (SIQ with soccer players 8, 10 and 14 years old. The data shows that subjects with a higher level of imagination are more inclined to use mental imagery in their practice. Age differences in types of imagery usage are shown. The results indicated that mentalimagery training can result in enhanced performance among junior athletes.

  9. Basic Instrumentation for Hall A at Jefferson Jab

    International Nuclear Information System (INIS)

    The Jefferson Lab Hall A Collaboration

    2003-01-01

    The instrumentation in Hall A at the JLab was designed to study electro- and photo-induced reactions at very high luminosity and good momentum and angular resolution for at least one of the reaction products. A collaboration of approximately 50 institutions from all over the world has actively contributed and participated in the design, construction and commissioning of the Hall A instrumentation. The basic Hall A equipment is described herein

  10. Eventqual: a measure of perceived quality of sporting event spectators

    Directory of Open Access Journals (Sweden)

    Ferran Calabuig Moreno, Javier Mundina Gómez, Josep Crespo Hervàs

    2010-07-01

    Full Text Available The purpose of this study was to develop a scale for measuring the perceived quality of the spectators at sporting events. A consulting expert’s method, known as Delphi, was used in order to propose a first version of the scale. This preliminary scale was administered to a small sample and a few items were eliminated after its analysis leaving a smaller scale. This scale was administered to a sample of 2,111 spectators at a mega-sporting event of multi-sport nature. The scale, named EVENTQUAL, showed good levels of reliability and validity. It underwent an exploratory factor analysis which identified four dimensions of perceived quality of sporting event spectators, which are the tangibles, staff, complementary services and accessibility

  11. Precision of single-engage micro Hall effect measurements

    DEFF Research Database (Denmark)

    Henrichsen, Henrik Hartmann; Hansen, Ole; Kjær, Daniel

    2014-01-01

    Recently a novel microscale Hall effect measurement technique has been developed to extract sheet resistance (RS), Hall sheet carrier density (NHS) and Hall mobility (μH) from collinear micro 4-point probe measurements in the vicinity of an insulating boundary [1]. The technique measures in less......]. In this study we calculate the measurement error on RS, NHS and μH resulting from electrode position errors, probe placement, sample size and Hall signal magnitude. We show the relationship between measurement precision and electrode pitch, which is important when down-scaling the micro 4-point probe to fit...

  12. High Efficiency Hall Thruster Discharge Power Converter Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Busek leveraged previous, internally sponsored, high power, Hall thruster discharge converter development which allowed it to design, build, and test new printed...

  13. Hall Sensor Output Signal Fault-Detection & Safety Implementation Logic

    Directory of Open Access Journals (Sweden)

    Lee SangHun

    2016-01-01

    Full Text Available Recently BLDC motors have been popular in various industrial applications and electric mobility. Recently BLDC motors have been popular in various industrial applications and electric mobility. In most brushless direct current (BLDC motor drives, there are three hall sensors as a position reference. Low resolution hall effect sensor is popularly used to estimate the rotor position because of its good comprehensive performance such as low cost, high reliability and sufficient precision. Various possible faults may happen in a hall effect sensor. This paper presents a fault-tolerant operation method that allows the control of a BLDC motor with one faulty hall sensor and presents the hall sensor output fault-tolerant control strategy. The situations considered are when the output from a hall sensor stays continuously at low or high levels, or a short-time pulse appears on a hall sensor signal. For fault detection, identification of a faulty signal and generating a substitute signal, this method only needs the information from the hall sensors. There are a few research work on hall effect sensor failure of BLDC motor. The conventional fault diagnosis methods are signal analysis, model based analysis and knowledge based analysis. The proposed method is signal based analysis using a compensation signal for reconfiguration and therefore fault diagnosis can be fast. The proposed method is validated to execute the simulation using PSIM.

  14. Neutronic design of MYRRHA reactor hall shielding

    Directory of Open Access Journals (Sweden)

    Celik Yurdunaz

    2017-01-01

    Full Text Available The lateral shielding of a 600 MeV proton linear accelerator beam line in the MYRRHA reactor hall has been assessed using neutronic calculations by the MCNPX code complemented with analytical predictions. Continuous beam losses were considered to define the required shielding thickness that meets the requirements for the dose rate limits. Required shielding thicknesses were investigated from the viewpoint of accidental full beam loss as well as beam loss on collimator. The results confirm that the required shielding thicknesses are highly sensitive to the spatial shape of the beam and strongly divergent beam losses. Therefore shielding barrier should be designed according to the more conservative assumptions.

  15. Fractional quantization and the quantum hall effect

    International Nuclear Information System (INIS)

    Guerrero, J.; Calixto, M.; Aldaya, V.

    1998-01-01

    Quantization with constrains is considered in a group-theoretical framework, providing a precise characterization of the set of good operators, i.e., those preserving the constrained Hilbert space, in terms of the representation of the subgroup of constraints. This machinery is applied to the quantization of the torus as symplectic manifold, obtaining that fractional quantum numbers are permitted, provided that we allow for vector valued representations. The good operators turn out to be the Wilson loops and, for certain representations of the subgroup of constraints, the modular transformations. These results are applied to the Fractional Quantum Hall Effect, where interesting implications are derived

  16. Optically induced Hall effect in semiconductors

    Energy Technology Data Exchange (ETDEWEB)

    Idrish Miah, M; Gray, E Mac A, E-mail: m.miah@griffith.edu.a [Nanoscale Science and Technology Centre, Griffith University, Nathan, Brisbane, QLD 4111 (Australia)

    2009-03-01

    We describe an experiment which investigates the effect of a longitudinal electric field on the spin-polarized carriers generated by a circularly polarized light in semiconductors. Our experiment observes the effect as a Hall voltage resulting from nonequilibrium magnetization induced by the spin-carrier electrons accumulating at the transverse boundaries of the sample as a result of asymmetries in scattering for spin-up and spin-down electrons in the presence of spin-orbit interaction. It is found that the effect depends on the longitudinal electric field and doping density as well as on temperature. The results are presented by discussing the dominant spin relaxation mechanisms in semiconductors.

  17. Hall conductivity for two dimensional magnetic systems

    International Nuclear Information System (INIS)

    Desbois, J.; Ouvry, S.; Texier, C.

    1996-01-01

    A Kubo inspired formalism is proposed to compute the longitudinal and transverse dynamical conductivities of an electron in a plane (or a gas of electrons at zero temperature) coupled to the potential vector of an external local magnetic field, with the additional coupling of the spin degree of freedom of the electron to the local magnetic field (Pauli Hamiltonian). As an example, the homogeneous magnetic field Hall conductivity is rederived. The case of the vortex at the origin is worked out in detail. A perturbative analysis is proposed for the conductivity in the random magnetic impurity problem (Poissonian vortices in the plane). (author)

  18. Chiral heat transport in driven quantum Hall and quantum spin Hall edge states

    Science.gov (United States)

    Arrachea, Liliana; Fradkin, Eduardo

    2011-12-01

    We consider a model for an edge state of electronic systems in the quantum Hall regime with filling ν=1 and in the quantum spin Hall regime. In both cases, the system is in contact with two reservoirs by tunneling at point contacts. Both systems are locally driven by applying an ac voltage in one of the contacts. By weakly coupling them to a third reservoir, the transport of the generated heat is studied in two different ways: (i) when the third reservoir acts as a thermometer, the local temperature is sensed and (ii) when the third reservoir acts as a voltage probe, the time-dependent local voltage is sensed. Our results indicate a chiral propagation of the heat along the edge in the quantum Hall and in the quantum spin Hall cases (if the injected electrons are spin polarized). We also show that a analogous picture is obtained if instead of heating by ac driving the system is put in contact to a stationary reservoir at a higher temperature. In both cases, the temperature profile shows that the electrons along the edge thermalize with the closest “upstream” reservoir.

  19. Sport tourist expectations of a world championship sporting event ...

    African Journals Online (AJOL)

    Sport tourists have preconceived expectations of the type and quality of services to be offered at a particular event. The extent to which these expectations are met will determine sport tourism satisfaction. For the purpose of this study the definition of a sport tourist was taken as any individual that facilitates or organise a sport ...

  20. Developing Sport Psychology in a Girls' Sport Academy Curriculum

    Science.gov (United States)

    Lewis, Andrew

    2014-01-01

    This article explores the initial steps in developing and presenting Sport Psychology in a leadership and sport curriculum at Stellenbosch University's (SU) Centre for Human Performance Sciences' (CHPS) Academy for Girls' Leadership and Sport Development. Sport Psychology does not feature within the South African school curriculum specifically,…

  1. Sports facilities: a problem of school sports in Nigeria | Olajide ...

    African Journals Online (AJOL)

    Facilities are very central to meaningful sports participation whether in School sports, amateur, recreational or competitive status. They are as important to the athletes as the laboratories are to the scientists. Without facilities sports cannot take place. This does not however imply that sports facility is the only variable that is ...

  2. Developing Sport Psychology in a girls' sport academy curriculum ...

    African Journals Online (AJOL)

    What was gained during this process, as well as the associated challenges encountered, suggest possible areas for research as well as changes and adjustments which could be made in similar Sport Psychology curricula. Keywords: adolescent girls; curriculum; Life Orientation; life skills; sport; sport academy; sport ...

  3. Some Sports Managers' Views about Values Education through Sports

    Science.gov (United States)

    Balci, Velittin; Erdeveciler, Övünç

    2017-01-01

    The indirect aim of this study is to ensure that sports and participation in sports are seen as new tools for values education. From this indirect goal, it was aimed to analyse the views of some Amateur Sports Club managers and supporters who were supposed to directly contribute to sports and the athletes about values education. The study was…

  4. Sport Nutritionist: A New Sport Education Role

    Science.gov (United States)

    Martin, Matthew R.; Zimmerman, Ryan; Ciotto, Carol

    2015-01-01

    Considering the challenges associated with adolescent obesity and the need for innovative and meaningful physical education curricula, the authors of this article decided to create a new sport education role to help students learn about the fundamental nutritional concepts and practices that contribute to a healthy and active lifestyle. The new…

  5. Maternity Leave Policies

    Science.gov (United States)

    Strang, Lucy; Broeks, Miriam

    2017-01-01

    Abstract Over recent years many European Union countries have made changes to the design of the maternity leave provision. These policy developments reflect calls for greater gender equality in the workforce and more equal share of childcare responsibilities. However, while research shows that long period of leave can have negative effects on women's labour market attachment and career advancements, early return to work can be seen as a factor preventing exclusive breastfeeding, and therefore, potentially having negative health impacts for babies. Indeed, the World Health Organisation recommends exclusive breastfeeding up to 6 months of age to provide babies with the nutrition for healthy growth and brain development, protection from life-threatening ailments, obesity and non-communicable diseases such as asthma and diabetes. Therefore, labour market demands on women may be at odds with the health benefits for children gained by longer periods of maternity leave. The aim of this article is to examine the relationship between leave provision and health benefits for children. We examine maternity and parental leave provision across European countries and its potential impact on the breastfeeding of very young babies (up to 6-months of age). We also consider economic factors of potential extension of maternity leave provision to 6 months, such as costs to businesses, effects on the female labour market attachment, and wider consequences (benefits and costs) for individuals, families, employers and the wider society. PMID:28983432

  6. Injuries in extreme sports.

    Science.gov (United States)

    Laver, Lior; Pengas, Ioannis P; Mei-Dan, Omer

    2017-04-18

    Extreme sports (ES) are usually pursued in remote locations with little or no access to medical care with the athlete competing against oneself or the forces of nature. They involve high speed, height, real or perceived danger, a high level of physical exertion, spectacular stunts, and heightened risk element or death.Popularity for such sports has increased exponentially over the past two decades with dedicated TV channels, Internet sites, high-rating competitions, and high-profile sponsors drawing more participants.Recent data suggest that the risk and severity of injury in some ES is unexpectedly high. Medical personnel treating the ES athlete need to be aware there are numerous differences which must be appreciated between the common traditional sports and this newly developing area. These relate to the temperament of the athletes themselves, the particular epidemiology of injury, the initial management following injury, treatment decisions, and rehabilitation.The management of the injured extreme sports athlete is a challenge to surgeons and sports physicians. Appropriate safety gear is essential for protection from severe or fatal injuries as the margins for error in these sports are small.The purpose of this review is to provide an epidemiologic overview of common injuries affecting the extreme athletes through a focus on a few of the most popular and exciting extreme sports.

  7. Genetics & sport: bioethical concerns.

    Science.gov (United States)

    Miah, Andy

    2012-12-01

    This paper provides an overview of the ethical issues pertaining to the use of genetic insights and techniques in sport. Initially, it considers a range of scientific findings that have stimulated debate about the ethical issues associated with genetics applied to sport. It also outlines some of the early policy responses to these discoveries from world leading sports organizations, along with knowledge about actual use of gene technologies in sport. Subsequently, it considers the challenges with distinguishing between therapeutic use and human enhancement within genetic science, which is a particularly important issue for the world of sport. Next, particular attention is given to the use of genetic information, which raises questions about the legitimacy and reliability of genetic tests, along with the potential public value of having DNA databanks to economize in health care. Finally, the ethics of gene transfer are considered, inviting questions into the values of sport and humanity. It argues that, while gene modification may seem conceptually similar to other forms of doping, the requirements upon athletes are such that new forms of enhancement become increasingly necessary to discover. Insofar as genetic science is able to create safer, more effective techniques of human modification, then it may be an appealing route through which to modify athletes to safeguard the future of elite sports as enterprises of human excellence.

  8. MANAGEMENT OF SPORT COMPLEXES

    Directory of Open Access Journals (Sweden)

    Marian STAN

    2015-07-01

    Full Text Available The actuality of the investigated theme. Nowadays, human evolution, including his intellectual development, proves the fact that especially the creation manpower and the employment was the solution of all life’s ambitions in society. So, the fact is that in reality, man is the most important capital of the society. Also, in an individual’s life, the practice of sport plays a significant role and that’s why the initiation, the launch and the management of sports complexes activity reveal the existence of specific management features that we will identify and explain in the current study. The aim of the research refers to the elaboration of a theoretical base of the management of the sport complexes, to the pointing of the factors that influence the efficient existence and function of a sport complex in our country and to the determination of the responsibilities that have a manager who directs successfully the activity of the sport complexes. The investigation is based on theoretical methods, such as: scientific documentation, analysis, synthesis, comparison and on empirical research methods, like: study of researched literature and observation. The results of the research indicate the fact that the profitability of a sport complex must assure a particular structure to avoid the bankruptcy risk and also, that the administration of the sport complexes activity must keep in view the reliable functions of the contemporaneous management.

  9. Cylindrical Hall Thrusters with Permanent Magnets

    International Nuclear Information System (INIS)

    Raitses, Yevgeny; Merino, Enrique; Fisch, Nathaniel J.

    2010-01-01

    The use of permanent magnets instead of electromagnet coils for low power Hall thrusters can offer a significant reduction of both the total electric power consumption and the thruster mass. Two permanent magnet versions of the miniaturized cylindrical Hall thruster (CHT) of different overall dimensions were operated in the power range of 50W-300 W. The discharge and plasma plume measurements revealed that the CHT thrusters with permanent magnets and electromagnet coils operate rather differently. In particular, the angular ion current density distribution from the permanent magnet thrusters has an unusual halo shape, with a majority of high energy ions flowing at large angles with respect to the thruster centerline. Differences in the magnetic field topology outside the thruster channel and in the vicinity of the channel exit are likely responsible for the differences in the plume characteristics measured for the CHTs with electromagnets and permanent magnets. It is shown that the presence of the reversing-direction or cusp-type magnetic field configuration inside the thruster channel without a strong axial magnetic field outside the thruster channel does not lead to the halo plasma plume from the CHT.

  10. Avalanche breakdown of the quantum hall effects

    CERN Document Server

    Komiyama, S

    1999-01-01

    Heat stability of two-dimensional electron gas (2DEG) systems in the integer quantum hall effect (IQHE) regime is discussed, and a heat instability is suggested to be the intrinsic mechanism behind the breakdown of the IQHE. Phenomenological argument is provided to suggest that the 2DEG system in the IQHE state becomes thermally unstable when the Hall electric field E sub y reaches a threshold value E sub b. Above E sub b , excited nonequilibrium electrons (holes), which are initially present in the conductor as the temperature fluctuation, are accelerated by E sub y and the 2DEG thereby undergoes a transition to a warm dissipative state. The critical field, E sub b , of this abrupt transition is theoretically estimated and shown to be in fare agreement with experimentally reported values. Consideration of the dynamics of electrons suggests that the transition is a process of avalanche electron-hole pair multiplication, in which a small number of non-equilibrium carriers, gains kinetic energy within a Landau ...

  11. Planar Hall Effect in Magnetic Conducting Oxides

    Science.gov (United States)

    Akouala, Christer Rajiv

    Magnetic semiconductors are of interest for use in non-volatile memory device read heads, magnetoresistive sensors, and other spintronic devices. Research in this area has mostly focused on generating magnetic semiconductors by doping non-magnetic semiconductors with magnetic ions. This work has instead taken advantage of the defectinduced magnetism in several semiconducting oxides. The planar Hall effect (PHE) is a phenomenon that can be used for characterizing magnetic semiconductors. Along with the anisotropic magnetoresistance (AMR), PHE has the potential to provide insight into the mechanism for magnetic behavior in magnetic conducting oxide thin films that are undoped. PHE has therefore been studied in undoped ZnO, SnO2, CdO, and CuO using magnetotransport and magnetometry techniques. The measurements included both AMR and PHE taken at various temperatures from 300 to 4.2K in a Quantum Design Physical Property Measurement System (QD-PPMS) and in a custom-built magnetotransport set-up. Complementary measurements include XRD, and resistivity measurements. Resistivity vs. temperature, Hall effect, and magnetoresistance measurements were performed in the PPMS. Magnetic hysteresis and magnetization vs. temperature were acquired using a Quantum Design Magnetic Properties Measurement System (QD-MPMS).

  12. Undulator Hall Air Temperature Fault Scenarios

    International Nuclear Information System (INIS)

    Sevilla, J.

    2010-01-01

    Recent experience indicates that the LCLS undulator segments must not, at any time following tuning, be allowed to change temperature by more than about ±2.5 C or the magnetic center will irreversibly shift outside of acceptable tolerances. This vulnerability raises a concern that under fault conditions the ambient temperature in the Undulator Hall might go outside of the safe range and potentially could require removal and retuning of all the segments. In this note we estimate changes that can be expected in the Undulator Hall air temperature for three fault scenarios: (1) System-wide power failure; (2) Heating Ventilation and Air Conditioning (HVAC) system shutdown; and (3) HVAC system temperature regulation fault. We find that for either a system-wide power failure or an HVAC system shutdown (with the technical equipment left on), the short-term temperature changes of the air would be modest due to the ability of the walls and floor to act as a heat ballast. No action would be needed to protect the undulator system in the event of a system-wide power failure. Some action to adjust the heat balance, in the case of the HVAC power failure with the equipment left on, might be desirable but is not required. On the other hand, a temperature regulation failure of the HVAC system can quickly cause large excursions in air temperature and prompt action would be required to avoid damage to the undulator system.

  13. Aleatorism and Sporting Performance

    Directory of Open Access Journals (Sweden)

    Kosiewicz Jerzy

    2017-03-01

    Full Text Available A sporting spectacle is an important cultural event, essentially influencing social and individual lives. In spite of this, there does not yet exist a monograph that analyzes, describes, and explains sporting performance from the point of view of aleatorism as part of the theory of sport and physical culture. Unfortunately, no monograph has developed this issue in a multi-aspectual, holistic, culturological, and philosophical way, dealing with its axiological values (aesthetic and praxeological. This applies to the relations between this phenomenon and the mechanisms that bring about the development and growth of interest in the social dimension.

  14. SPORT AND EXERCISE PSYCHOLOGY

    Directory of Open Access Journals (Sweden)

    Andy Lane

    2008-09-01

    Full Text Available DESCRIPTION The book introduces the undergraduate psychology student to both academic and professional aspects of Sport and Exercise Psychology. It uses up to date research evidence, established theory and a variety of activities that help the student consider and understand academic and professional aspects of this particular academic discipline. PURPOSE The book aims to provide the undergraduate psychology student with a structured introduction to the subject area and an insight into the theoretical evidence and practical suggestions that underpin what a Sport and Exercise psychologist does. The book also aims to support one term or one semester courses in Sport and Exercise Psychology. It is also appropriate for Masters level courses. FEATURES The book begins with a chapter on applied sports psychology to give the reader an insight into the domain of sport psychology, providing an overview of the techniques that could be used. The next three chapters focus on mood, anxiety and self confidence, which influence performance. This leads on to four chapters that focus on managing psychological states. There is also a chapter on leadership which interestingly includes leadership development in coaches and in athletes. Two chapters focus on the effects of exercise on psychological states, providing a balance between the benefits and potential drawbacks. The final chapter examines the issue of placebo effects. Throughout each chapter there are useful activities than can help the reader's understanding of practical and theoretical issues. These also have practical implications for the work of a Sport and Exercise Psychologist. Key ethical issues are raised on a regular basis throughout the text. The book offers an excellent blend of theory and practical suggestions which are critically discussed thus giving valuable insights regarding the research process and applied practice which is often lacking in the more well known standard textbooks for Sport

  15. Athletic pubalgia (sports hernia).

    Science.gov (United States)

    Litwin, Demetrius E M; Sneider, Erica B; McEnaney, Patrick M; Busconi, Brian D

    2011-04-01

    Athletic pubalgia or sports hernia is a syndrome of chronic lower abdomen and groin pain that may occur in athletes and nonathletes. Because the differential diagnosis of chronic lower abdomen and groin pain is so broad, only a small number of patients with chronic lower abdomen and groin pain fulfill the diagnostic criteria of athletic pubalgia (sports hernia). The literature published to date regarding the cause, pathogenesis, diagnosis, and treatment of sports hernias is confusing. This article summarizes the current information and our present approach to this chronic lower abdomen and groin pain syndrome. Copyright © 2011 Elsevier Inc. All rights reserved.

  16. The Development of Sports Medicine.

    Science.gov (United States)

    Waddington, Ivan

    1996-01-01

    The development of sports medicine was influenced by medicalization and increasing competitiveness in modern sport, with sports physicians helping to develop performance enhancing drugs and techniques. This paper discusses sports medicine and drug use in Eastern European countries, early development of anabolic steroids in the United States, and…

  17. Sport in the Netherlands 2009

    NARCIS (Netherlands)

    Annet Tiessen-Raaphorst; Koen Breedveld

    2009-01-01

    Sport is a popular pastime in the Netherlands; More than 10 million people take part in at least one sport. To do this, they can choose from more than 27,000 non-profit sports clubs, or more than 7,200 commercial providers such as fitness centres or riding stables. Among the most popular sports

  18. Key Topics in Sports Medicine

    OpenAIRE

    2006-01-01

    Key Topics in Sports Medicine is a single quick reference source for sports and exercise medicine. It presents the essential information from across relevant topic areas, and includes both the core and emerging issues in this rapidly developing field. It covers: 1) Sports injuries, rehabilitation and injury prevention, 2) Exercise physiology, fitness testing and training, 3) Drugs in sport, 4) Exercise and health promotion, 5) Sport and exercise for special and clinical populations, 6) The ps...

  19. Quantum Hall samples prepared by helium-ion implantation

    International Nuclear Information System (INIS)

    Bruus, H.; Lindelof, P.E.; Veje, E.

    1990-01-01

    We have produced GaAs/GaAlAs heterostructure based quantum Hall samples with a wide range of electron mobilities using ion implantation. The purpose has been to optimize the samples for use in metrology. We have in particular studied the critical current and the non-ohmic behavior of our samples in the vicinity of a quantum Hall plateau. (orig.)

  20. A Business-Oriented Student Program: Residence Hall Stores.

    Science.gov (United States)

    Valerio, Vance R.

    1983-01-01

    Describes a residence hall store program which provides prepackaged food and snacks to students at Marquette University. Results of a survey of 21 colleges which have residence hall stores revealed primarily informal organizations. Stores can be a successful student development technique which teaches principles of small-business management. (JAC)

  1. Magnetoresistance in quantum Hall metals due to Pancharatnam ...

    Indian Academy of Sciences (India)

    topological insulators [10,11] and quantum Hall metals [12–21] are the other major solid- state systems that currently need proper and consistent formulations to understand their electronic properties, regardless of whether these systems have the potential for future technological marvels. Here, we shall derive the trial Hall ...

  2. Mary E. Hall: Dawn of the Professional School Librarian

    Science.gov (United States)

    Alto, Teresa

    2012-01-01

    A century ago, a woman named Mary E. Hall convinced school leaders of the need for the professional school librarian--a librarian who cultivated a love of reading, academic achievement, and independent learning skills. After graduating from New York City's Pratt Institute Library School in 1895, Hall developed her vision for the high school…

  3. Role of the Hall Effect on the Magnetorotational Instability

    Science.gov (United States)

    Bejarano, Cecilia; Gómez, Daniel

    Within the framework of magnetohydrodynamics, the Hall effect might become significant either in fully ionized low density plasmas or in cold plasmas with a low ionization fraction. We address the role of the Hall current in the development of the magnetorotational instability. The instability criterion and the instability growth rate are derived from a one-dimensional model.

  4. Pair spectrometer hodoscope for Hall D at Jefferson Lab

    Energy Technology Data Exchange (ETDEWEB)

    Barbosa, F.; Hutton, C.; Sitnikov, A. [Thomas Jefferson National Accelerator Facility, Newport News, VA 23606 (United States); Somov, A., E-mail: somov@jlab.org [Thomas Jefferson National Accelerator Facility, Newport News, VA 23606 (United States); Somov, S.; Tolstukhin, I. [National Research Nuclear University MEPhI, Moscow (Russian Federation)

    2015-09-21

    We present the design of the pair spectrometer hodoscope fabricated at Jefferson Lab and installed in the experimental Hall D. The hodoscope consists of thin scintillator tiles; the light from each tile is collected using wave-length shifting fibers and detected using a Hamamatsu silicon photomultiplier. Light collection was measured using relativistic electrons produced in the tagger area of the experimental Hall B.

  5. Critical current in the Integral Quantum Hall Effect

    International Nuclear Information System (INIS)

    Kostadinov, I.Z.

    1985-11-01

    A multiparticle theory of the Integral Quantum Hall Effect (IQHE) was constructed operating with pairs wave function as an order parameter. The IQHE is described with bosonic macroscopic states while the fractional QHE with fermionic ones. The calculation of the critical current and Hall conductivity temperature dependence is presented. (author)

  6. Spin hall effect associated with SU(2) gauge field

    Science.gov (United States)

    Tao, Y.

    2010-01-01

    In this paper, we focus on the connection between spin Hall effect and spin force. Here we investigate that the spin force due to spin-orbit coupling, which, in two-dimensional system, is equivalent to forces of Hirsch and Chudnovsky besides constant factors 3 and frac{3}{2} respectively, is a part of classic Anandan force, and that the spin Hall effect is an anomalous Hall effect. Furthermore, we develop the method of AC phase to derive the expression for the spin force, and note that the most basic spin Hall effect indeed originate from the AC phase and is therefore an intrinsic quantum mechanical property of spin. This method differs from approach of Berry phase in the study of anomalous Hall effect , which is the intrinsic property of the perfect crystal. On the other hand, we use an elegant skill to show that the Chudnovsky-Drude model is reasonable. Here we have improved the theoretical values of spin Hall conductivity of Chudnovsky. Compared to the theoretical values of spin Hall conductivity in the Chudnovsky-Drude model, ours are in better agreement with experimentation. Finally, we discuss the relation between spin Hall effect and fractional statistics.

  7. Stuart Hall on Racism and the Importance of Diasporic Thinking

    Science.gov (United States)

    Rizvi, Fazal

    2015-01-01

    In this article, I want to show how my initial encounter with the work of Stuart Hall was grounded in my reading of the later philosophy of Ludwig Wittgenstein, and was shaped by my interest in understanding the nature of racism across the three countries in which I had lived. Over the years, Hall's various writings have helped me to make sense of…

  8. Useful Pedagogical Applications of the Classical Hall Effect

    Science.gov (United States)

    Houari, Ahmed

    2007-01-01

    One of the most known phenomena in physics is the Hall effect. This is mainly due to its simplicity and to the wide range of its theoretical and practical applications. To complete the pedagogical utility of the Hall effect in physics teaching, I will apply it here to determine the Faraday constant as a fundamental physical number and the number…

  9. Bulk Versus Edge in the Quantum Hall Effect

    OpenAIRE

    Kao, Y. -C.; Lee, D. -H.

    1996-01-01

    The manifestation of the bulk quantum Hall effect on edge is the chiral anomaly. The chiral anomaly {\\it is} the underlying principle of the ``edge approach'' of quantum Hall effect. In that approach, $\\sxy$ should not be taken as the conductance derived from the space-local current-current correlation function of the pure one-dimensional edge problem.

  10. Photobiomodulation on sports injuries

    Science.gov (United States)

    Liu, Xiao-Guang; Liu, Timon C.; Jiao, Jian-Ling; Li, Cheng-Zhang; Xu, Xiao-Yang

    2003-12-01

    Sports injuries healing has long been an important field in sports medicine. The stimulatory effects of Low intensity laser (LIL) irradiation have been investigated in several medical fields, such as cultured cell response, wound healing, hormonal or neural stimulation, pain relief and others. The aim of this study was to evaluate whether LIL irradiation can accelerate sports injuries healing. Some experimental and clinical studies have shown the laser stimulation effects on soft tissues and cartilage, however, controversy still exists regarding the role of LIL when used as a therapeutic device. Summarizing the data of cell studies and animal experiments and clinic trials by using the biological information model of photobiomodulation, we conclude that LIL irradiation is a valuable treatment for superficial and localized sports injuries and that the injuries healing effects of the therapy depend on the dosage of LIL irradiation.

  11. Doping control in sport

    DEFF Research Database (Denmark)

    Overbye, Marie Birch

    2016-01-01

    Doping testing is a key component enforced by anti-doping authorities to detect and deter doping in sport. Policy is developed to protect athletes' right to participate in doping-free sport; and testing is a key tool to secure this right. Accordingly, athletes' responses to anti-doping efforts.......e., the efforts of stakeholders involved in testing) in their own sport both nationally and worldwide. Moreover, it seeks to identify whether specific factors such as previous experience of testing and perceived proximity of doping have an impact on athletes' perceptions of the testing system. The study comprises...... a web-based questionnaire (N = 645; response rate 43%) and uses qualitative findings to elaborate on and explain quantitative results. Results showed that two-thirds of the athletes reported the national testing programme in their sport to be appropriate. A majority of the athletes who had an opinion...

  12. Parenting in sport.

    Science.gov (United States)

    Knight, Camilla J; Berrow, Steffan R; Harwood, Chris G

    2017-08-01

    This paper provides a brief summary and commentary on the growing literature on parenting in sport, with a particular emphasis on literature from the last 2-3 years. Following a brief introduction overviewing the topic area, we firstly focus on the influence of parental involvement on children. Specifically, we examine the range of factors that influence children's perceptions of parental involvement and the consequences of different behaviors. Next we discuss the factors influencing parental involvement, such as the challenges and stressors associated with parenting children in sport and the culture within different sports. Finally, our review focuses upon the strategies developed by parents to facilitate their involvement in their children's sport, as well as the few papers focused upon parent education and support. We conclude by examining the need for further research and examination of support strategies for parents. Crown Copyright © 2017. Published by Elsevier Ltd. All rights reserved.

  13. Ocular Injuries In Sport

    Directory of Open Access Journals (Sweden)

    Onur İNAM

    2016-03-01

    Full Text Available Sports related ocular injury is one of the most important reasons of morbidity, blindness and labor loss. Especially children and those who play paintball, basketball and ice hockey are at high risk. Sports can be classified as high risk group, moderate risk group and low risk group according to the risk of these injuries. The extent of the trauma to the eye depends on the shape, velocity and rigidity of the trauma object. Physician can have an opinion about the severity of the trauma by having a carefully taken anamnesis and physical examination. In this manner, sports physicians should do the first aid procedures to the injury and should know in which cases decide not to continue the game. The most important feature of sports-related ocular injury is 90% of these injuries can be preventable in nature. Protective eyeglasses usage and taking simple precautions substantially protects player from serious ocular injuries.

  14. SPORT MARKETING MIX STRATEGIES

    Directory of Open Access Journals (Sweden)

    Alexandru Lucian MIHAI

    2013-06-01

    Full Text Available This paper presents a brief overview of a significant element of the sport marketing management model called the marketing mix. The marketing mix is crucial because it defines the sport business, and much of the sport marketer’s time is spent on various functions within the marketing mix. The marketing mix is the strategic combination of the product, price, place and promotion elements. These elements are typically called the four Ps of marketing. Decisions and strategies for each are important for the marketer. Information for making educated decisions involving the four Ps comes from the marketing research involving primarily the four Cs - consumer, competitor, company and climate. A critical decision and one of the greatest challenges for the sport business is how to strategically combine the four Ps to best satisfy the consumer, meet company objectives, enhance market position, and enhance competitive advantages.

  15. Rethinking enhancement in sport.

    Science.gov (United States)

    Miah, Andy

    2006-12-01

    This article explores the arguments surrounding the use of human enhancement technologies in sport, arguing for a reconceptualization of the doping debate. First, it develops an overview and critique of the legislative structures on enhancement. Subsequently, a conceptual framework for understanding the role of technological effects in sport is advanced. Finally, two case studies (hypoxic chambers and gene transfer) receive specific attention, through which it is argued that human enhancement technologies can enrich the practice of elite sports rather than diminish them. In conclusion, it is argued that elite sports are at a pivotal moment in their history as an increasing range of enhancements makes less relevant the protection of the natural human through anti-doping.

  16. Sport injuries in adolescents

    Directory of Open Access Journals (Sweden)

    Susanne Habelt

    2011-11-01

    Full Text Available In spite of the wide range of injuries in adolescents during sports activities, there are only a few studies investigating the type and frequency of sport injuries in puberty. However, this information may help to prevent, diagnose and treat sports injuries among teens. 4468 injuries in adolescent patients were treated over a ten year period of time: 66,97% were boys and 32.88% girls. The most frequent sports injuries were football (31.13% followed by handball (8.89% and sports during school (8.77%. The lower extremity was involved in 68.71% of the cases. Knee problems were seen in 29.79% of the patients; 2.57% spine and 1.99% head injuries. Injuries consisted primarily of distortions (35.34% and ligament tears (18.76%; 9,00% of all injuries were fractures. We found more skin wounds (6:1 and fractures (7:2 in male patients compared to females. The risk of ligament tears was highest during skiing. Three of four ski injuries led to knee problems. Spine injuries were observed most often during horse riding (1:6. Head injuries were seen in bicycle accidents (1:3. Head injuries were seen in male patients much more often then in female patients (21:1. Fractures were noted during football (1:9, skiing (1:9, inline (2:3, and during school sports (1:11. Many adolescents participate in various sports. Notwithstanding the methodological problems with epidemiological data, there is no doubt about the large number of athletes sustain musculoskeletal injuries, sometimes serious. In most instances, the accident does not happened during professional sports and training. Therefore, school teachers and low league trainer play an important role preventing further accidence based on knowledge of individual risk patterns of different sports. It is imperative to provide preventive medical check-ups, to monitor the sport-specific needs for each individual sports, to observe the training skills as well as physical fitness needed and to evaluation coaches education.

  17. Sport injuries in adolescents

    Science.gov (United States)

    Habelt, Susanne; Hasler, Carol Claudius; Steinbrück, Klaus; Majewski, Martin

    2011-01-01

    In spite of the wide range of injuries in adolescents during sports activities, there are only a few studies investigating the type and frequency of sport injuries in puberty. However, this information may help to prevent, diagnose and treat sports injuries among teens. 4468 injuries in adolescent patients were treated over a ten year period of time: 66,97% were boys and 32.88% girls. The most frequent sports injuries were football (31.13%) followed by handball (8.89%) and sports during school (8.77%). The lower extremity was involved in 68.71% of the cases. Knee problems were seen in 29.79% of the patients; 2.57% spine and 1.99% head injuries. Injuries consisted primarily of distortions (35.34%) and ligament tears (18.76%); 9,00% of all injuries were fractures. We found more skin wounds (6:1) and fractures (7:2) in male patients compared to females. The risk of ligament tears was highest during skiing. Three of four ski injuries led to knee problems. Spine injuries were observed most often during horse riding (1:6). Head injuries were seen in bicycle accidents (1:3). Head injuries were seen in male patients much more often then in female patients (21:1). Fractures were noted during football (1:9), skiing (1:9), inline (2:3), and during school sports (1:11). Many adolescents participate in various sports. Notwithstanding the methodological problems with epidemiological data, there is no doubt about the large number of athletes sustain musculoskeletal injuries, sometimes serious. In most instances, the accident does not happened during professional sports and training. Therefore, school teachers and low league trainer play an important role preventing further accidence based on knowledge of individual risk patterns of different sports. It is imperative to provide preventive medical check-ups, to monitor the sport-specific needs for each individual sports, to observe the training skills as well as physical fitness needed and to evaluation coaches education. PMID

  18. Sports: Ice -Doping Time

    OpenAIRE

    Barys Tasman

    2013-01-01

    In 2013 the systematic degradation of Belarusian sports continued, which was most vivid in the mass and most popular kinds of sports – soccer, hockey, track and field athletics, and also in the traditional Olympic disciplines – cycling, boxing, weight-lifting. The national ice hockey team lost the qualification tournament and failed to get to the Olympic Games in Sochi. The football national team took the last place in the qualifying group tournament at the 2014 World Cup. At the World Forum ...

  19. Western Sport and Spiritualism

    OpenAIRE

    Kosiewicz Jerzy

    2014-01-01

    Sport activity of achievement-oriented (professional, Olympic, spectacular character) is first of all exposition of rivalry and striving for variously understood sports success (resulting from measurable or discretionary criteria). It refers to winning a competition or taking another expected place as well as to other forms of satisfaction, such as financial gratification or social (political, ethnic, professional) recognition. Spirituality is here neither an aim, nor an expected value - it c...

  20. SPORT I POLITIKA

    Directory of Open Access Journals (Sweden)

    Mensur Memić

    2005-04-01

    Full Text Available Sport and politic are two big appearance and human activities which have as difference so the same segments. New society, democratic society necessity cultivate realization of sport-politic.We could say they are dominates phenomens of modern society. Like this they are manifestationed on the different necessity ways and have different roles. They are sa different as same. Everybody who take part in one or other sphere know from society from sociolog aspect how are two society components connected and reservationed beetwen. Why I am telling it: because the future of sportsmen depend from the future of politics will. Its needed to show how politic manage or give s the hope for development and animate possibility that young people during their evolution can do sport. Politic also depend from sports instutitions on creation mood of young people that their cadres got general and society dope. These two concepts can be near define. Sport as activity and as a appeal represent specific sights orientation of young people in aim curing knight games and evervthing in aim of health formation and effort of results, but they are not only meanings, through the sport can progress and big number acquaintance, friendship and intimacy, through sport ali cultural heredity can be keeping and the lands vvhich belong. Sport sociological looking is important element society life people. Second concept-politic, according to the famous politicians we can definite as a action that direct with another activities and business. Politic is substance, process of manifestation, manner, and it mean that politic has its subject activities vvhich is consist on behavour other social groups.

  1. MANAGEMENT AND SPORTING ACTIVITIES

    Directory of Open Access Journals (Sweden)

    MONICA DELIA BÎCĂ

    2015-10-01

    Full Text Available “Using applied science in sport management as creates opportunities for rationalization and systematization of sports activity, relying on the knowledge and application of the laws that control the dynamics and phenomena. Management is on the border between art and science. Arts management is manifested by "science" as opposed to use and harness the creative compromise that can produce increased efficiency and effectiveness.”

  2. Sport Spaces for All

    DEFF Research Database (Denmark)

    Wagner, Anne Margrethe

    2010-01-01

    Præsentation af det digitale værktøj "Idrætsrum for alle" ved konferencen Sport-Architektur-Form i Dresden den 29-30. oktober 2010......Præsentation af det digitale værktøj "Idrætsrum for alle" ved konferencen Sport-Architektur-Form i Dresden den 29-30. oktober 2010...

  3. HYDROSOLUBLE VITAMINS AND SPORT

    OpenAIRE

    Vladmila Bojanić; Jelena Radović; Zoran Bojanić; Marko Lazović

    2011-01-01

    Vitamins are organic substances needed for normal cell functioning in the human body, and therefore human health. People who train sports require an optimal psychophysical performance in order to achieve the best sports results. Athletes’ needs for vitamins may be higher than in general population, also they are taking vitamin supplements more often than other people. Thus, it is very important for them to be familiar with the vitamins’ roles and recommended intake levels.Hydrosoluble vitamin...

  4. Sports during a crisis

    OpenAIRE

    Barys Tasman

    2016-01-01

    The crisis in the economy immediately affected the sports industry, one of the largest expense items of the Belarusian budget. Investments in youth and mass sports, as well as in football declined significantly. The situation is aggravated by corruption, doping and other scandals and managerial confusion. The most positive outcomes are associated with the global leadership of Belarusian rowing and canoeing and a recovering athletics sector. Trends: • Organizational changes in athletics; • Deg...

  5. Caffeine and sports performance.

    Science.gov (United States)

    Burke, Louise M

    2008-12-01

    Athletes are among the groups of people who are interested in the effects of caffeine on endurance and exercise capacity. Although many studies have investigated the effect of caffeine ingestion on exercise, not all are suited to draw conclusions regarding caffeine and sports performance. Characteristics of studies that can better explore the issues of athletes include the use of well-trained subjects, conditions that reflect actual practices in sport, and exercise protocols that simulate real-life events. There is a scarcity of field-based studies and investigations involving elite performers. Researchers are encouraged to use statistical analyses that consider the magnitude of changes, and to establish whether these are meaningful to the outcome of sport. The available literature that follows such guidelines suggests that performance benefits can be seen with moderate amounts (~3 mg.kg-1 body mass) of caffeine. Furthermore, these benefits are likely to occur across a range of sports, including endurance events, stop-and-go events (e.g., team and racquet sports), and sports involving sustained high-intensity activity lasting from 1-60 min (e.g., swimming, rowing, and middle and distance running races). The direct effects on single events involving strength and power, such as lifts, throws, and sprints, are unclear. Further studies are needed to better elucidate the range of protocols (timing and amount of doses) that produce benefits and the range of sports to which these may apply. Individual responses, the politics of sport, and the effects of caffeine on other goals, such as sleep, hydration, and refuelling, also need to be considered.

  6. Unconventional quantum Hall effect in Floquet topological insulators

    KAUST Repository

    Tahir, M.

    2016-07-27

    We study an unconventional quantum Hall effect for the surface states of ultrathin Floquet topological insulators in a perpendicular magnetic field. The resulting band structure is modified by photon dressing and the topological property is governed by the low-energy dynamics of a single surface. An exchange of symmetric and antisymmetric surface states occurs by reversing the lights polarization. We find a novel quantum Hall state in which the zeroth Landau level undergoes a phase transition from a trivial insulator state, with Hall conductivity αyx = 0 at zero Fermi energy, to a Hall insulator state with αyx = e2/2h. These findings open new possibilities for experimentally realizing nontrivial quantum states and unusual quantum Hall plateaus at (±1/2,±3/2,±5/2, ...)e2/h. © 2016 IOP Publishing Ltd Printed in the UK.

  7. Accurate micro Hall effect measurements on scribe line pads

    DEFF Research Database (Denmark)

    Østerberg, Frederik Westergaard; Petersen, Dirch Hjorth; Wang, Fei

    2009-01-01

    be extracted from micro four-point measurements performed on a rectangular pad. The dimension of the investigated pad is 400 × 430 ¿m2, and the probe pitches range from 20 ¿m to 50 ¿m. The Monte Carlo method is used to find the optimal way to perform the Hall measurement and extract Hall mobility most......Hall mobility and sheet carrier density are important parameters to monitor in advanced semiconductor production. If micro Hall effect measurements are done on small pads in scribe lines, these parameters may be measured without using valuable test wafers. We report how Hall mobility can...... accurate in less than a minute. Measurements are performed on shallow trench isolation patterned silicon wafers to verify the results from the Monte Carlo method....

  8. A Novel Hall Effect Sensor Using Elaborate Offset Cancellation Method

    Directory of Open Access Journals (Sweden)

    Vlassis N. Petoussis

    2009-01-01

    Full Text Available The Hall effect is caused by a traverse force that is formed in the electrons or holes of metal element or semiconductor when are polarized by current source and simultaneously all the system it is found vertical in external magnetic field. Result is finally the production of difference of potential (Hall voltage in address vertical in that of current and magnetic field directions. In the present work is presented a new Hall sensor exploiting the former operation. In combination with his pioneering form and using dynamic spinning current technique with an elaborate sequence, it leads to satisfactory results of produced Hall voltage with small noise in a presence of external magnetic field. Anyone can see both the spinning current and anti-Hall technique in the same sensor simultaneously.

  9. Sports related to drowning.

    Science.gov (United States)

    Szpilman, David; Orlowski, James P

    2016-09-01

    Aquatic sports are included in the top list of risky practices as the environment per se carries a possibility of death by drowning if not rescued in time. Not only are aquatic sports related to a high risk of death, but also all sports practiced on the water, over the water and on ice. Whatever the reason a person is in the water, drowning carries a higher possibility of death if the individual is unable to cope with the water situation, which may simply be caused by an inability to stay afloat and get out of the water or by an injury or disease that may lead to physical inability or unconsciousness. The competitive nature of sports is a common pathway that leads the sports person to exceed their ability to cope with the environment or simply misjudge their physical capability. Drowning involves some principles and medical interventions that are rarely found in other medical situations as it occurs in a deceptively hostile environment that may not seem dangerous. Therefore, it is essential that health professionals are aware of the complete sequence of action in drowning. This article focuses on the pulmonary injury in sports and recreational activities where drowning plays the major role. Copyright ©ERS 2016.

  10. TRAVEL AND HOME LEAVE

    CERN Multimedia

    Human Resources Division

    2002-01-01

    Administrative procedures for : Travel to the home station and home leave (hl) Additional travel to the home station (at) Travel to the home station and home leave for family reasons (hlf) As part of the process of simplifying administrative procedures, HR and AS Divisions have devised a new, virtually automatic procedure for payment of travel expenses to the home station. The changes are aimed at rationalising administrative procedures and not at reducing benefits. The conditions of eligibility are unchanged. The new procedure, which will be operational with effect from 1st June 2002, will greatly simplify the administrative processing of claims for travel expenses and the recording of home leaves. Currently, requests for payment are introduced manually into the Advances and Claims system (AVCL) by divisional secretariats. All travel to the home station starting prior to 1st June 2002 will be processed according to the existing system whereas that starting on 1st June and after will be processed accordi...

  11. Performance of a Cylindrical Hall-Effect Thruster Using Permanent Magnets

    Science.gov (United States)

    Polzin, Kurt A.; Raitses, Y.; Merino, E.; Fisch, N. J.

    2009-01-01

    While annular Hall thrusters can operate at high efficiency at kW power levels, it is difficult to construct one that operates over a broad envelope from 1 kW down to 100 W while maintaining an efficiency of 45-55%. Scaling to low power while holding the main dimensionless parameters constant requires a decrease in the thruster channel size and an increase in the magnetic field strength. Increasing the magnetic field becomes technically challenging since the field can saturate the miniaturized inner components of the magnetic circuit and scaling down the magnetic circuit leaves very little room for magnetic pole pieces and heat shields. In addition, the central magnetic pole piece defining the interior wall of the annular channel can experience excessive heat loads in a miniaturized Hall thruster, with the temperature eventually exceeding the Curie temperature of the material and in extreme circumstances leading to accelerated erosion of the channel wall. An alternative approach is to employ a cylindrical Hall thruster (CHT) geometry. Laboratory model CHTs have operated at power levels ranging from 50 W up to 1 kW. These thrusters exhibit performance characteristics that are comparable to conventional, annular Hall thrusters of similar size. Compared to the annular Hall thruster, the CHTs insulator surface area to discharge chamber volume ratio is lower. Consequently, there is the potential for reduced wall losses in the channel of a CHT, and any reduction in wall losses should translate into lower channel heating rates and reduced erosion, making the CHT geometry promising for low-power applications. This potential for high performance in the low-power regime has served as the impetus for research and development efforts aimed at understanding and improving CHT performance. Recently, a 2.6 cm channel diameter permanent magnet CHT (shown in Fig. 1) was tested. This thruster has the promise of reduced power consumption over previous CHT iterations that employed

  12. EL CROWN HALL. CONTEXTO Y PROYECTO / The Crown Hall. Context and project

    Directory of Open Access Journals (Sweden)

    José Santatecla Fayós

    2010-05-01

    Full Text Available RESUMEN El artículo enmarca el edificio del Crown Hall en el contexto docente y arquitectónico de Mies van der Rohe. Revisa sus inicios en la Bauhaus con su primera intervención en un espacio docente para la Bauhaus de Berlín en 1932, así como su marcha a Estados Unidos, los planteamientos arquitectónicos del campus del IIT y el proyecto del Crown Hall. El texto incide en el estudio del proceso proyectual del Crown Hall analizando la evolución de su concepción arquitectónica a través de las diferentes versiones del proyecto. Se constata la transición desde los primeros planteamientos arquitectónicos de los edificios del campus del IIT proyectados por Mies hacia el planteamiento del gran espacio unitario del Crown Hall. Este proyecto se puede entender desde la creciente importancia de la estructura, la claridad constructiva y el manejo del acero y vidrio como únicos materiales de la imagen del edificio y el carácter flexible y unitario del espacio. Finalmente se hace referencia al concepto del “espacio universal” en la arquitectura de Mies, como un concepto abstracto que supera los de flexibilidad de uso o unidad espacial, insinuando, a modo de reflexión, las principales variables que definirían el espacio universal miesiano. SUMMARY The article showcases the Crown Hall building in the educational and architectural context of Mies van der Rohe. It reviews his beginnings in the Bauhaus with his first intervention in an educational space for the Bauhaus of Berlin in 1932, as well as his sojourn to the United States, and the architectural approaches to the IIT campus and the Crown Hall project. The text touches on the study of the planning process for the Crown Hall, analysing the evolution of its architectural conception, through the different versions of the project. The article covers the transition from the first architectural approaches for the IIT campus buildings, planned by Mies, to the approach of the large unitary space

  13. Concept of Operating Indoor Skiing Halls with

    DEFF Research Database (Denmark)

    Paul, Joachim

    2003-01-01

    Indoor skiing halls are conventionally operated at low temperatures and with either crushed ice as snow substitute or snow made from freezing water in cold air. Both systems have a high energy demand for air cooling, floor freezing and consequently snow harvest. At the same time the snow at the top...... floor cooling/freezing and insulation become obsolete, significant savings in piping and building costs can be achieved. Due to the much higher evaporating temperature for the refrigeration system, the energy demand is kept low. Since the same equipment is used for both snowmaking and air cooling......, the running time of the equipment is high, resulting in a better economy. Using Binary Snow, with its unique qualities such as fluffy, crisp, white and ¿ since made daily ¿ "fresh and hygienic", offers great advantages in operating costs, investment costs and quality....

  14. Magnetic circuit for hall effect plasma accelerator

    Science.gov (United States)

    Manzella, David H. (Inventor); Jacobson, David T. (Inventor); Jankovsky, Robert S. (Inventor); Hofer, Richard (Inventor); Peterson, Peter (Inventor)

    2009-01-01

    A Hall effect plasma accelerator includes inner and outer electromagnets, circumferentially surrounding the inner electromagnet along a thruster centerline axis and separated therefrom, inner and outer magnetic conductors, in physical connection with their respective inner and outer electromagnets, with the inner magnetic conductor having a mostly circular shape and the outer magnetic conductor having a mostly annular shape, a discharge chamber, located between the inner and outer magnetic conductors, a magnetically conducting back plate, in magnetic contact with the inner and outer magnetic conductors, and a combined anode electrode/gaseous propellant distributor, located at a bottom portion of the discharge chamber. The inner and outer electromagnets, the inner and outer magnetic conductors and the magnetically conducting back plate form a magnetic circuit that produces a magnetic field that is largely axial and radially symmetric with respect to the thruster centerline.

  15. Frequency spectrum of Calder Hall reactor noise

    International Nuclear Information System (INIS)

    Cummins, J.D.

    1960-01-01

    The frequency spectrum of the noise power of Calder Hall reactor No. 1 has been obtained by analysing a tape recording of the backed off power. The root mean square noise power due to all frequencies above 0.001 cycles per second was found to be 0.13%. The noise power for this reactor, is due mainly to modulations of the power level by reactivity variations caused in turn by gas temperature changes. These gas temperature changes are caused by a Cyclic variation in the feedwater regulator to the heat exchanger. The apparatus and method used to determine the noise power are described in this memorandum. It is shown that for frequencies in the range 0.001 to 0.030 cycles per second the noise spectrum falls at 60 decibels per decade of frequency. (author)

  16. Numerical investigation of a Hall thruster plasma

    International Nuclear Information System (INIS)

    Roy, Subrata; Pandey, B.P.

    2002-01-01

    The dynamics of the Hall thruster is investigated numerically in the framework of a one-dimensional, multifluid macroscopic description of a partially ionized xenon plasma using finite element formulation. The model includes neutral dynamics, inelastic processes, and plasma-wall interaction. Owing to disparate temporal scales, ions and neutrals have been described by set of time-dependent equations, while electrons are considered in steady state. Based on the experimental observations, a third order polynomial in electron temperature is used to calculate ionization rate. The results show that in the acceleration channel the increase in the ion number density is related to the decrease in the neutral number density. The electron and ion velocity profiles are consistent with the imposed electric field. The electron temperature remains uniform for nearly two-thirds of the channel; then sharply increases to a peak before dropping slightly at the exit. This is consistent with the predicted electron gyration velocity distribution

  17. Gauge Physics of Spin Hall Effect

    Science.gov (United States)

    Tan, Seng Ghee; Jalil, Mansoor B. A.; Ho, Cong Son; Siu, Zhuobin; Murakami, Shuichi

    2015-12-01

    Spin Hall effect (SHE) has been discussed in the context of Kubo formulation, geometric physics, spin orbit force, and numerous semi-classical treatments. It can be confusing if the different pictures have partial or overlapping claims of contribution to the SHE. In this article, we present a gauge-theoretic, time-momentum elucidation, which provides a general SHE equation of motion, that unifies under one theoretical framework, all contributions of SHE conductivity due to the kinetic, the spin orbit force (Yang-Mills), and the geometric (Murakami-Fujita) effects. Our work puts right an ambiguity surrounding previously partial treatments involving the Kubo, semiclassical, Berry curvatures, or the spin orbit force. Our full treatment shows the Rashba 2DEG SHE conductivity to be instead of -, and Rashba heavy hole instead of -. This renewed treatment suggests a need to re-derive and re-calculate previously studied SHE conductivity.

  18. Fractional quantum Hall effect in optical lattices

    International Nuclear Information System (INIS)

    Hafezi, M.; Demler, E.; Lukin, M. D.; Soerensen, A. S.

    2007-01-01

    We analyze a recently proposed method to create fractional quantum Hall (FQH) states of atoms confined in optical lattices [A. Soerensen et al., Phys. Rev. Lett. 94, 086803 (2005)]. Extending the previous work, we investigate conditions under which the FQH effect can be achieved for bosons on a lattice with an effective magnetic field and finite on-site interaction. Furthermore, we characterize the ground state in such systems by calculating Chern numbers which can provide direct signatures of topological order and explore regimes where the characterization in terms of wave-function overlap fails. We also discuss various issues which are relevant for the practical realization of such FQH states with ultracold atoms in an optical lattice, including the presence of a long-range dipole interaction which can improve the energy gap and stabilize the ground state. We also investigate a detection technique based on Bragg spectroscopy to probe these systems in an experimental realization

  19. Nonadiabatic effects in the Quantum Hall regime

    International Nuclear Information System (INIS)

    Page, D.A.; Brown, E.

    1993-01-01

    The authors consider the effect of a finite electric field on the states of a Bloch electron in two dimensions, with a uniform magnetic field present. They make use of the concept of electric time translation symmetry and treat the electric and magnetic fields symmetrically in a time dependent formalism. In addition to a wave vector k, the states are characterized by a frequency specifying the behavior under electric time translations. An effective Hamiltonian is employed to obtain the splitting of an isolated Bloch band into open-quotes frequencyclose quotes subbands. The time-averaged velocity and energy of the states are expressed in terms of the frequency dispersion. The relationship to the Stark ladder eigenstates in a scalar potential representation of the electric field is examined. This is seen to justify the use of the averaged energy in determining occupation of the states. In the weak electric field (adiabatic) limit, an expression is recovered for the quantized Hall conductivity of a magnetic subband as a topological invariant. A numerical procedure is outlined and results obtained over a range of electric field strengths. A transition between strong and weak field regimes is seen, with level repulsions between the frequencies playing an important role. The numerical results show how the magnetic subband structure and quantized Hall conductivity emerge as the electric field becomes weaker. In this regime, the behavior can be understood by comparison to the predictions of the adiabatic approximation. The latter predicts crossings in the frequencies at certain locations in wave vector space. Nonadiabatic effects are seen to produce gaps in the frequency spectrum at these locations. 35 refs., 14 figs

  20. State of development of sport and technical and applied sports in the sports organizations of Ukraine

    Directory of Open Access Journals (Sweden)

    N.V. Tikhonova

    2014-10-01

    Full Text Available Purpose : the study of the development of sport and technical and applied sports in the sports organizations of Ukraine. Material : the results of analysis of scientific and methodical literature, statistical reports of the Ministry of Youth and Sports, controls for Physical Culture and Sport, the governing bodies of education and science, society websites promoting Defence of Ukraine, the Sports Committee of Ukraine. Results : technical sports solve complex health and educational problems, promote patriotic education of children. In Ukraine today gaining popularity of sports-technical and applied sports. According to statistics the number of students enrolled in 2013 increased by 6% (1720 people in relation to 2012. Total 30484 person. The most popular among children and adolescents are: military-sport all-around (amount involved is 23.9% of the total number of pupils, fire-applied sports (8.8%, parachute (8.7%, automotive (8.1 %, model aircraft (7.8%, underwater (5.8%, radio sport (7.1%. The most abundant component in the number of sports clubs have engaged in occupations which covered 18264 children and adolescents. Conclusions : Implementation of measures for further development of sports engineering, aviation and military applied sports will foster a versatile development, hardened physically, technically trained people. As the formation of the younger generation of sustained interest and needs in the classroom technical creativity, provide training for young people for military service and active labor.

  1. Paide gümnaasiumi spordihoone konkurss = Paide Gymnasium Sports Hall Competition / Tiit Trummal

    Index Scriptorium Estoniae

    Trummal, Tiit, 1954-

    2006-01-01

    Žürii liige konkursist, võidutöödest. Žürii koosseis. Konkursi tulemused: I preemia - Karli Luik, Ralf Lõoke, Maarja Kask, töö "Täheke"; II - Ott Kadarik, Villem Tomiste, Mihkel Tüür, töö "Unioon"; III - Koit Ojaliiv, Juhan Rohtla, kaasautor Tõnu Laigu, töö "Kivi"; ostupreemia - Lauri Saar, Tõnu Laanemäe, Indrek Järve, Jaak-Adam Looveer (PAIK Arhitektid), töö "Sensei"

  2. Sports Specialization in Young Athletes

    Science.gov (United States)

    Jayanthi, Neeru; Pinkham, Courtney; Dugas, Lara; Patrick, Brittany; LaBella, Cynthia

    2013-01-01

    Context: Sports specialization is intense training in 1 sport while excluding others. Sports specialization in early to middle childhood has become increasingly common. While most experts agree that some degree of sports specialization is necessary to achieve elite levels, there is some debate as to whether such intense practice time must begin during early childhood and to the exclusion of other sports to maximize potential for success. There is a concern that sports specialization before adolescence may be deleterious to a young athlete. Evidence Acquisition: PubMed and OVID were searched for English-language articles from 1990 to 2011 discussing sports specialization, expert athletes, or elite versus novice athletes, including original research articles, consensus opinions, and position statements. Results: For most sports, there is no evidence that intense training and specialization before puberty are necessary to achieve elite status. Risks of early sports specialization include higher rates of injury, increased psychological stress, and quitting sports at a young age. Sports specialization occurs along a continuum. Survey tools are being developed to identify where athletes fall along the spectrum of specialization. Conclusion: Some degree of sports specialization is necessary to develop elite-level skill development. However, for most sports, such intense training in a single sport to the exclusion of others should be delayed until late adolescence to optimize success while minimizing injury, psychological stress, and burnout. PMID:24427397

  3. Sport-specific balance.

    Science.gov (United States)

    Zemková, Erika

    2014-05-01

    This review includes the latest findings based on experimental studies addressing sport-specific balance, an area of research that has grown dramatically in recent years. The main objectives of this work were to investigate the postural sway response to different forms of exercise under laboratory and sport-specific conditions, to examine how this effect can vary with expertise, and to provide examples of the association of impaired balance with sport performance and/or increasing risk of injury. In doing so, sports where body balance is one of the limiting factors of performance were analyzed. While there are no significant differences in postural stability between athletes of different specializations and physically active individuals during standing in a standard upright position (e.g., bipedal stance), they have a better ability to maintain balance in specific conditions (e.g., while standing on a narrow area of support). Differences in magnitude of balance impairment after specific exercises (rebound jumps, repeated rotations, etc.) and mainly in speed of its readjustment to baseline are also observed. Besides some evidence on an association of greater postural sway with the increasing risk of injuries, there are many myths related to the negative influence of impaired balance on sport performance. Though this may be true for shooting or archery, findings have shown that in many other sports, highly skilled athletes are able to perform successfully in spite of increased postural sway. These findings may contribute to better understanding of the postural control system under various performance requirements. It may provide useful knowledge for designing training programs for specific sports.

  4. Epilepsy and sports participation.

    Science.gov (United States)

    Howard, Gregory M; Radloff, Monika; Sevier, Thomas L

    2004-02-01

    Epilepsy is a common disease found in 2% of the population, affecting both young and old. Unfortunately, epileptics have previously been discouraged from participation in physical activity and sports for fear of inducing seizures or increasing seizure frequency. Despite a shift in medical recommendations toward encouraging rather than restricting participation, the stigma remains and epileptics continue to be less active than the general population. This results in increased body mass index, decreased aerobic endurance, poorer self-esteem, and higher levels of anxiety and depression. Although there are rare cases of exercise-induced seizures, studies have shown that physical activity can decrease seizure frequency, as well as lead to improved cardiovascular and psychologic health. The majority of sports are safe for epileptics to participate in with special attention to adequate seizure control, close monitoring of medications, and preparation of family, coaches, or trainers. Contact sports including football, hockey, and soccer have not been shown to induce seizures, and epileptics should not be precluded from participation. Water sports and swimming are felt to be safe if seizures are well controlled and direct supervision is present. Additional care must be taken in sports involving heights such as gymnastics, harnessed rock climbing, or horseback riding. Sports such as hang-gliding, scuba diving, or free climbing are not recommended, given the risk of severe injury or death, if a seizure were to occur during the activity. This article reviews the risks and benefits of physical activity in epileptics, discusses sports in which epileptics may participate, and addresses how to decrease possible risks for injury.

  5. Maternity Leave in Taiwan

    Science.gov (United States)

    Feng, Joyce Yen; Han, Wen-Jui

    2010-01-01

    Using the first nationally representative birth cohort study in Taiwan, this paper examines the role that maternity leave policy in Taiwan plays in the timing of mothers returning to work after giving birth, as well as the extent to which this timing is linked to the amount of time mothers spend with their children and their use of breast milk…

  6. REMINDER: Saved Leave Scheme (SLS)

    CERN Multimedia

    2003-01-01

    Transfer of leave to saved leave accounts Under the provisions of the voluntary saved leave scheme (SLS), a maximum total of 10 days'* annual and compensatory leave (excluding saved leave accumulated in accordance with the provisions of Administrative Circular No 22B) can be transferred to the saved leave account at the end of the leave year (30 September). We remind you that unused leave of all those taking part in the saved leave scheme at the closure of the leave year accounts is transferred automatically to the saved leave account on that date. Therefore, staff members have no administrative steps to take. In addition, the transfer, which eliminates the risk of omitting to request leave transfers and rules out calculation errors in transfer requests, will be clearly shown in the list of leave transactions that can be consulted in EDH from October 2003 onwards. Furthermore, this automatic leave transfer optimizes staff members' chances of benefiting from a saved leave bonus provided that they ar...

  7. Use of Sports Science Knowledge by Turkish Coaches.

    Science.gov (United States)

    Kilic, Koray; Ince, Mustafa Levent

    The purpose of this study is to examine the following research questions in Turkish coaching context: a) What are coaches' perceptions on the application of sport science research to their coaching methods? b) What sources do coaches utilize to obtain the knowledge they need? c) What barriers do coaches encounter when trying to access and apply the knowledge they need for their sport? In addition, differences in research questions responses were examined based on gender, years of coaching experience, academic educational level, coaching certificate level, coaching team or individual sports, and being paid or unpaid for coaching. The participants were 321 coaches (255 men, 66 women) from diverse sports and coaching levels working in Ankara. The questionnaire "New Ideas for Coaches" by Reade, Rodgers and Hall (2008) was translated, adapted into Turkish, and validated for the current study. According to our findings among Turkish coaches, there is a high prevalence of beliefs that sport science contributes to sport (79.8%);however, there are gaps between what coaches are looking for and the research that is being conducted. Coaches are most likely to attend seminars or consult other coaches to get new information. Scientific publications were ranked very low by the coaches in getting current information. The barriers to coaches' access to sport science research are finding out the sources of information, being able to implement the sport science knowledge into the field of coaching, lack of monetary support in acquiring knowledge, and language barriers. Also, differences in perceptions and preferences for obtaining new information were identified based on coaches' gender, coaching contexts (i.e., professional-amateur), coaching settings (i.e., team/individual), and their other demographic characteristics (i.e., coaching experience, coaching educational level, and coaching certificate level). Future coach education programs should emphasize the development of coaches

  8. INTRODUCTION TO THE SPECIAL ISSUE ON COMBAT SPORT

    Directory of Open Access Journals (Sweden)

    Andrew M. Lane

    2006-07-01

    Full Text Available Combat Sports Special Issue Editorial INTRODUCTION TO THE SPECIAL ISSUE ON COMBAT SPORT The World heavyweight professional boxing championship is arguable the biggest prize in sport. Why is this the case? It is not just the glamour that is appealing, but also the intriguing appeal of two combatants in a fixed environment. All combat sports share this similarity and in doing so, combat sports become appealing for spectators to watch, provide competitors with their ultimate challenge, and provide sport scientists and medics with a rich environment to apply their work. The role of research and theory driven interventions is key to the credibility of sport science and sports medicine. An intervention and/or treatment must be based on sound reason and the effects should be considered beforehand, both positive and negative. Equally, the nature of combat sport, where the aim is to strike, throw, or grapple with an opponent which can lead to injury, invariably raises questions on whether it is morally acceptable for these activities to be called a sport. Therefore, thorough investigation of the nature of medical issues is needed. The case for banning boxing in inextricably linked to the notion that the aim of the sport is to cause harm to the opponent; if harm was minimized and injury became less of an injury, the case for banning boxing would be weak. Quite clearly there are a plethora of arguments that point to a need for theory driven research in combat sport, and plugging this gap in the literature is an aim of this special issue of the Journal of Sports Science and Medicine. Possibly the most convincing argument for me to get involved in driving this issue stems from experiences in applied work with professional boxers (Hall and Lane, 2001; Lane and Hall, 2003, amateur boxers (Lane, 2002, kickboxers (Lane, et al., 1999 and tae-kwon-do athletes (Chapman et al., 1997 in which a raft of situations and issues were presented that required answers based

  9. Nutrition in team sports.

    Science.gov (United States)

    Mujika, Iñigo; Burke, Louise M

    2010-01-01

    Team sports are based on intermittent high-intensity activity patterns, but the exact characteristics vary between and within codes, and from one game to the next. Despite the challenge of predicting exact game demands, performance in team sports is often dependent on nutritional factors. Chronic issues include achieving ideal levels of muscle mass and body fat, and supporting the nutrient needs of the training program. Acute issues, both for training and in games, include strategies that allow the player to be well fuelled and hydrated over the duration of exercise. Each player should develop a plan of consuming fluid and carbohydrate according to the needs of their activity patterns, within the breaks that are provided in their sport. In seasonal fixtures, competition varies from a weekly game in some codes to 2-3 games over a weekend road trip in others, and a tournament fixture usually involves 1-3 days between matches. Recovery between events is a major priority, involving rehydration, refuelling and repair/adaptation activities. Some sports supplements may be of value to the team athlete. Sports drinks, gels and liquid meals may be valuable in allowing nutritional goals to be met, while caffeine, creatine and buffering agents may directly enhance performance. Copyright © 2011 S. Karger AG, Basel.

  10. Sports in postmodern era

    Directory of Open Access Journals (Sweden)

    Paul Miron

    2009-06-01

    Full Text Available The present study tries to make a resume from a socio-cultural point of view of the sportiv peisage analized in the evolutionof society trying to answer some questions such as: What is the place of sports in our modern society? How does sportinfluence social and cultural evolutions? What are the cultural tendencies which can be distinguished in the sports practice?These are a few questions which could lead to establishing raports between sports, culture and society. Sport is more andmore amrked by the charactersitics of postmoderinsm. New social values are being vehiclated by current generations whichinfluence sportive behaviours. The popularity of sports has a big influence in the process of globalisation of politics,economics and culture. In our days we observe the fact that some contradictions are being manifested: globalisation andindividualisation, „sportivisation” and „desportivisation”, a culture of health and a culture of amusement and finally,spontaneity and fragmentation compared to the security and autentification of the individual.

  11. Sports Medicine: What is a Sports Medicine Specialist?

    Science.gov (United States)

    What is a Sports Medicine Specialist? A physician with significant specialized training in both the treatment and prevention of illness and injury. The Sports Medicine Specialist helps patients maximize function and minimize ...

  12. Transport measurements of GaAs/AlGaAs devices in the ``anti-Hall-bar within a Hall bar" geometry

    Science.gov (United States)

    Kriisa, Annika; Mani, Ramesh

    2009-11-01

    Hall effect measurements are often carried out in the Hall geometry, which is a thin rectangular plate with current and Hall voltage contacts at the external boundary. The motivation of this study is to further understand the impact on Hall effect when a hole is inserted inside the Hall geometry. One way on conducting this investigation is to superimpose an ``anti-Hall bar'' inside the standard Hall bar, where the anti Hall bar is actually the hole inside the Hall device with contacts on the inside boundary of this hole. This configuration is thought to generate an ordinary Hall effect within the interior boundary. One believes that it might also be possible to simultaneously realize multiple independent Hall effects by injecting multiple currents into the multiply connected device [1]. We have experimentally studied the Hall effect in the doubly connected ``anti-Hall bar within a Hall bar'' geometry fabricated out of the GaAs/AlGaAs semiconductor system, and convey the results in this presentation. [4pt] [1] R. G. Mani and K. von Klitzing, Z. Phys. B 92, 335 (1993).

  13. The prevalence of sick leave

    DEFF Research Database (Denmark)

    Backhausen, Mette; Damm, Peter; Bendix, Jane

    2018-01-01

    Objective We aimed to investigate the prevalence of sick leave and self-reported reasons given for sick leave during pregnancy. Furthermore, we aimed to estimate the frequency of long-term sick leave during pregnancy in relation to pre-baseline maternal characteristics and to identify predictors...... on sick leave and the associated reasons. Descriptive statistics and logistic regression analysis were applied. Results The prevalence of sick leave was 56% of employed pregnant women in the first 32 weeks of gestation and more than one in four reported long-term sick leave (>20 days, continuous...... was a negative predictor. Conclusions The prevalence of sick leave was 56% in the first 32 weeks of gestation and more than one in four women reported long-term sick leave. The majority of reasons for sick leave were pregnancy-related and low back pain was the most frequently given reason....

  14. Hall conductance and topological invariant for open systems.

    Science.gov (United States)

    Shen, H Z; Wang, W; Yi, X X

    2014-09-24

    The Hall conductivity given by the Kubo formula is a linear response of quantum transverse transport to a weak electric field. It has been intensively studied for quantum systems without decoherence, but it is barely explored for systems subject to decoherence. In this paper, we develop a formulism to deal with this issue for topological insulators. The Hall conductance of a topological insulator coupled to an environment is derived, the derivation is based on a linear response theory developed for open systems in this paper. As an application, the Hall conductance of a two-band topological insulator and a two-dimensional lattice is presented and discussed.

  15. Acoustic investigations of concert halls for rock music

    DEFF Research Database (Denmark)

    Adelman-Larsen, Niels Werner; Thompson, Eric Robert; Gade, Anders Christian

    2007-01-01

    Objective measurement data and subjective evaluations have been collected from 20 small-/medium-sized halls in Denmark used for amplified rhythmic music concerts (pop, rock, jazz). The purpose of the study was to obtain knowledge about optimum acoustic conditions for this type of hall. The study...... is motivated by the fact that most concert tickets sold in Denmark relate to concerts within these genres in this kind of venue. The subjective evaluations were carried out by professional musicians and sound engineers who responded on the basis of their experiences working in these (and other) halls. From...

  16. Effective Field Theory of Fractional Quantized Hall Nematics

    Energy Technology Data Exchange (ETDEWEB)

    Mulligan, Michael; /MIT, LNS; Nayak, Chetan; /Station Q, UCSB; Kachru, Shamit; /Stanford U., Phys. Dept. /SLAC

    2012-06-06

    We present a Landau-Ginzburg theory for a fractional quantized Hall nematic state and the transition to it from an isotropic fractional quantum Hall state. This justifies Lifshitz-Chern-Simons theory - which is shown to be its dual - on a more microscopic basis and enables us to compute a ground state wave function in the symmetry-broken phase. In such a state of matter, the Hall resistance remains quantized while the longitudinal DC resistivity due to thermally-excited quasiparticles is anisotropic. We interpret recent experiments at Landau level filling factor {nu} = 7/3 in terms of our theory.

  17. Signal conditioning and processing for metallic Hall sensors.

    Czech Academy of Sciences Publication Activity Database

    Entler, Slavomír; Ďuran, Ivan; Sládek, P.; Vayakis, G.; Kočan, M.

    2017-01-01

    Roč. 123, November (2017), s. 783-786 ISSN 0920-3796. [SOFT 2016: Symposium on Fusion Technology /29./. Prague, 05.09.2016-09.09.2016] R&D Projects: GA MŠk LG14002 Institutional support: RVO:61389021 Keywords : Hall sensor * Lock-in * Synchronous detection * Current spinning * Hall effect * Planar hall effect suppression Subject RIV: JF - Nuclear Energetics OBOR OECD: Nuclear related engineering Impact factor: 1.319, year: 2016 http://www.sciencedirect.com/science/article/pii/S0920379617305070

  18. Anomalous Hall effect in Fe/Gd bilayers

    KAUST Repository

    Xu, W. J.

    2010-04-01

    Non-monotonic dependence of anomalous Hall resistivity on temperature and magnetization, including a sign change, was observed in Fe/Gd bilayers. To understand the intriguing observations, we fabricated the Fe/Gd bilayers and single layers of Fe and Gd simultaneously. The temperature and field dependences of longitudinal resistivity, Hall resistivity and magnetization in these films have also been carefully measured. The analysis of these data reveals that these intriguing features are due to the opposite signs of Hall resistivity/or spin polarization and different Curie temperatures of Fe and Gd single-layer films. Copyright (C) EPLA, 2010

  19. Sport's offer as an instrument of sports marketing mix

    Directory of Open Access Journals (Sweden)

    Gašović Milan

    2004-01-01

    Full Text Available Taking logical postulate that a product is all what can be offered on the market in order to satisfy needs, demands or wants of customer, regarding the core of sport's offer (product, marketing experts must give answers to three key questions: What can sports companies, teams or individuals offer to consumer? What needs can sports companies, teams or individuals satisfy? What instruments (techniques and methods should use marketing experts in sports organizations in order to satisfy identified customer needs? .

  20. Sporting embodiment: sports studies and the (continuing) promise of phenomenology

    OpenAIRE

    Allen-Collinson, Jacquelyn

    2009-01-01

    Whilst in recent years sports studies have addressed the calls ‘to bring the body back in’ to theorisations of sport and physical activity, the ‘promise of phenomenology’ remains largely under-realised with regard to sporting embodiment. Relatively few accounts are grounded in the ‘flesh’ of the lived sporting body, and phenomenology offers a powerful framework for such analysis. A wide-ranging, multi-stranded, and interpretatively contested perspective, phenomenology in general has been take...

  1. Materials for giant spin Hall effect devices

    Science.gov (United States)

    Jayanthinarasimham, Avyaya

    Studies presented in this thesis are an effort to control the growth of beta W and explore the in-plane current induced effects in a beta W and CoFeB bilayer. Physical vapor deposited W films beyond 5 nm transform from beta to the stable bulk alpha phase. beta W films with 5 nm thickness when integrated with the other films for large scale fabrication presents a small process window for etch and deposition errors. Also, CoFeB on W does not generate perpendicular magnetic anisotropy (PMA) even when it is capped with MgOjTa(Capping) layers. The beta W with larger thickness process window and a CoFeB with PMA deposited on top of W is necessary for an ideal functioning spin Hall effect (SHE) device. This thesis will focus on overcoming the above mentioned challenges. 2 sccm of O2 gas was introduced during the growth of beta W, this resulted in thicker films with beta W. If a large amount of O2 was introduced, it resulted in complete oxidation and loss of crystallinity. Thus an optimum amount of oxygen is necessary. However, introducing O2 during the deposition can effect other metals present on the wafer, which is not ideal. N2 was utilized to achieve thicker beta W films. Upon introducing N with similar concentration of O, it lead to amorphization of W, thus revealing a kinetic control. A pulsed N2 of 1 sccm at 2-second period was used to kinetically control the growth of beta W. Both the techniques were able to grow beta W from 5 nm up to 20 nm thick films. Films with N-assisted growth exhibited lower resistance and higher metallic character. 1 nm Ta, Mo and CoFe were used as insert layers between beta W and CoFeB to induce PMA. 1 nm Mo insert layer and 5 nm Mo under layer have largely different interfaces with CoFeB even when annealed in ultra high vacuum (UHV) environment. Thus, 1 nm Mo layer does not show any PMA. The CoFe insert layer adds to the bulk anisotropy and dominates the interface anisotropy, and does not lead to any PMA. The 1 nm Ta insert exhibits

  2. Western Sport and Spiritualism

    Directory of Open Access Journals (Sweden)

    Kosiewicz Jerzy

    2014-06-01

    Full Text Available Sport activity of achievement-oriented (professional, Olympic, spectacular character is first of all exposition of rivalry and striving for variously understood sports success (resulting from measurable or discretionary criteria. It refers to winning a competition or taking another expected place as well as to other forms of satisfaction, such as financial gratification or social (political, ethnic, professional recognition. Spirituality is here neither an aim, nor an expected value - it constitutes rather an additional or redundant quality. A competitor focuses his/her attention first of all on the main aim assumed in planned or current rivalry. Emotional sensations which are experienced by athletes before, during or after competitions testify to mental and emotional stress which accompanies sports combat.

  3. SPORT PROMOTION STRATEGIES

    Directory of Open Access Journals (Sweden)

    Alexandru Lucian MIHAI

    2013-10-01

    Full Text Available In sport marketing, the word promotion covers a range of interrelated activities. All of these activities are designed to attract attention, stimulate the interest and awareness of consumers, and of course, encourage them to purchase a sport product. Promotion is about communicating with and educating consumers. The purpose of a sport promotional strategy is to build brand loyalty and product credibility, develop image, and position the brand. A promotional strategy is similar to a marketing strategy, but the promotional strategy seeks short-term objectives, both direct and indirect. Promotional objectives usually include increased sales, stimulate impulse buying, raise customer traffic, and present and reinforce image. It also provides information about products and services, publicizes new stores or websites, and creates and enhances customer satisfaction.

  4. Perceived Impacts of Sport

    Directory of Open Access Journals (Sweden)

    IOANNIS DOUVIS

    2008-01-01

    Full Text Available It was the purpose of this preliminary project to measure how individuals perceive the impacts of sport in such areas as the economy, the environment, culture, community image and the quality of life, among other areas. The instrument was initially field tested in 1999 with a sample of 702 residents in the North eastern part of the United States. Their views suggest that they perceive sports to make a generally positive contribution to their communities and the local region. Some negative impacts were also identified, mostly of an environmental nature. However, the findings suggest that sports for the most part are perceived to play a major role in the lives of people and contribute in significant ways to the economy, and community pride.

  5. Commuting, Exercise and Sport

    DEFF Research Database (Denmark)

    Larsen, Jonas

    2018-01-01

    The uniqueness of this article is that it deals with long-distance bike commuting in pro-cycling Copenhagen and its environs. Informed by practice theory and sensuous studies of urban and sport practices, I discuss the ‘things and environments’, ‘meanings’ and ‘competences and biological bodies......’ that typify long-distance commuter cycling. This article develops cycling literature and the ‘mobilities paradigm’ in the following ways: by outlining a practice approach to cycling; challenging the idea that commuter cycling is only for short distances; undermining the distinction between utility and sport...... cycling; and lastly by connecting the ‘mobilities paradigm’ with literature on active travel and sport studies....

  6. The importance of sport psychology in school sport | le Roux ...

    African Journals Online (AJOL)

    The primary aim of this investigation was to determine whether the application of Sport Psychology in the coaching of school sport is a necessity or a luxury. The study revealed that school athletes desire further information about Sport Psychology and want the services to be more available. Teacher coaches need some ...

  7. Sport tourist expectations of a world championship sporting event ...

    African Journals Online (AJOL)

    ... on the economic and psychic income potential of the event. Sport event organisers should pursue multiple goals when designing the product and service parameters of a particular event. Keywords: Sport tourist, Expectations, Service experience, Satisfaction South African Journal for Research in Sport, Physical Education ...

  8. Sport Psychology: Myths in Sport Education and Physical Education

    Science.gov (United States)

    Griffin, Joy

    2008-01-01

    From a sport and exercise psychology viewpoint, this article describes the increasing professionalization of youth sport and how many well-intentioned people are using misconceptions or myths to organize and administer youth sport programs. For example, professionalization has led to specialization and year-round training, while playing multiple…

  9. Direct Drive Hall Thruster System Development

    Science.gov (United States)

    Hoskins, W. Andrew; Homiak, Daniel; Cassady, R. Joseph; Kerslake, Tom; Peterson, Todd; Ferguson, Dale; Snyder, Dave; Mikellides, Ioannis; Jongeward, Gary; Schneider, Todd

    2003-01-01

    The sta:us of development of a Direct Drive Ha!! Thruster System is presented. 13 the first part. a s:udy of the impacts to spacecraft systems and mass benefits of a direct-drive architecture is reviewed. The study initially examines four cases of SPT-100 and BPT-4000 Hall thrusters used for north-south station keeping on an EXPRESS-like geosynchronous spacecraft and for primary propulsion for a Deep Space- 1 based science spacecraft. The study is also extended the impact of direct drive on orbit raising for higher power geosynchronous spacecraft and on other deep space missions as a function of power and delta velocity. The major system considerations for accommodating a direct drive Hall thruster are discussed, including array regulation, system grounding, distribution of power to the spacecraft bus, and interactions between current-voltage characteristics for the arrays and thrusters. The mass benefit analysis shows that, for the initial cases, up to 42 kg of dry mass savings is attributable directly to changes in the propulsion hardware. When projected mass impacts of operating the arrays and the electric power system at 300V are included, up to 63 kg is saved for the four initial cases. Adoption of high voltage lithium ion battery technology is projected to further improve these savings. Orbit raising of higher powered geosynchronous spacecraft, is the mission for which direct drive provides the most benefit, allowing higher efficiency electric orbit raising to be accomplished in a limited period of time, as well as nearly eliminating significant power processing heat rejection mass. The total increase in useful payload to orbit ranges up to 278 kg for a 25 kW spacecraft, launched from an Atlas IIA. For deep space missions, direct drive is found to be most applicable to higher power missions with delta velocities up to several km/s , typical of several Discovery-class missions. In the second part, the status of development of direct drive propulsion power

  10. STRESS FRACTURES IN SPORT

    Directory of Open Access Journals (Sweden)

    Đivo Ban

    2009-11-01

    Full Text Available Children and adolescents today, all before starting with regular sports activities and involvement in semi-professional and top professional sport, so it increases the num- ber of discovered stress fractures in this age. This type of injury can occur as a consequence of action one strong force, or the many repeated small force strength, to be exact, when the load (stress transcend ability reparations bones. Stress fractures are recorded and described up to the lower limbs. Research has been confirmed that the bones of lower leg are mostly made in injury, and with the el- derly and with the population of children and young adolescents. Occur in many sports, something to them is greater when the frequency of running and often are present in the female population. According to the results of numerous investigations, mistakes in the training are the most common cause of the emergence of stress fracture. In a direct comparison with complemented these injuries is the condition of muscles, so it is important that at the sa- me time carry out exercises strengthen muscles and stretching. Typical clinical signs of stress fractures are localized painful sensitivity to palpa- tion and runoff in a small number of cases. The basic diagnostic procedure is a medical check, it is the small, radiology and scintigraphyc diagnostics (most accurate and mag- netic resonance imaging. Treatment is usually without surgery and conservative, with rest and reducing stress, and its activity athlete breaks mainly between four and eight weeks. Only the very need surgical treatment The most important thing is that attention is focused on the proper prevention and to take all that it ever occurred to stress fractures that athletes ramble of the courts and the competition (better education of sports workers, separation of groups with increa- sed risk of the formation of an injury, adaptation activities age and abilities of athletes, adequate sports equipment, high-quality sports

  11. Sports Medicine: A Functional Definition.

    Science.gov (United States)

    Kegerreis, Sam

    1981-01-01

    Sports medicine represents a specific body of knowledge which can be practiced as a subspecialty by numerous members of medical society. Professional and sandlot athletes are equally deserving of competent and expedient sports medical care. (JN)

  12. Sport Management Survey. Employment Perspectives.

    Science.gov (United States)

    Quain, Richard J.; Parks, Janet B.

    1986-01-01

    A survey of sport management positions was designed to determine projected vacancy rates in six sport management career areas. Respondents to the survey were also questioned regarding their awareness of college professional preparation programs. Results are presented. (MT)

  13. Guide to Eating for Sports

    Medline Plus

    Full Text Available ... down on carbs or chugging sports drinks. The good news is that eating to reach your peak ... should provide the vitamins and minerals needed for good health and sports performance. Protein Power Athletes may ...

  14. Guide to Eating for Sports

    Medline Plus

    Full Text Available ... Out Fat and Calories Sports Center Vitamins and Minerals Sports Supplements Female ... Visit the Nemours Web site. Note: All information on TeensHealth® is for educational purposes only. ...

  15. Guide to Eating for Sports

    Medline Plus

    Full Text Available ... Sexual Health Food & Fitness Diseases & Conditions Infections Drugs & Alcohol School & Jobs Sports Expert Answers (Q&A) Staying ... than chowing down on carbs or chugging sports drinks. The good news is that eating to reach ...

  16. Guide to Eating for Sports

    Medline Plus

    Full Text Available ... Health Food & Fitness Diseases & Conditions Infections Drugs & Alcohol School & Jobs Sports Expert Answers (Q&A) Staying Safe Videos for Educators Search English Español A Guide to Eating for Sports KidsHealth / ...

  17. Grebet af sport?

    DEFF Research Database (Denmark)

    Andersen, Tem Frank

    2017-01-01

    I sommeren 1936 blev de Olympiske Lege gennemført i Tyskland. Mediehistorisk var det en begivenhed, fordi det var de første tv-transmitterede Olympiske Lege. Selvom transmissionen kun nåede ud til små biografteatre i de tyske storbyer, så var det noget af en præstation. Over 70 timers sport med de...... fleste af de discipliner, vi kender fra Legene. (...) Uanset hvornår vi daterer sportens begyndelse, så har den haft en dobbelthed. Sport er ikke kun for dem på banen, men også dem på sidelinjerne....

  18. Nuclear medicine in sports

    International Nuclear Information System (INIS)

    Sharma, Anshu Rajnish

    2010-01-01

    Nuclear medicine can synergistically contribute to the sports medicine field, in the management of sports-related stress injures. Bone scintigraphy is commonly requested for evaluation of athletes with pain. Three-Phase 99m Tc MDP Bone Scan has emerged as the imaging reference standard for diagnosing such injuries. The inherently high-contrast resolution of the bone scan allows early detection of bone trauma and becomes positive within six to seventy-two hours after the onset of symptoms. The bone scan is able to demonstrate stress injuries days to weeks before the radiograph

  19. Sports and Child Development

    Science.gov (United States)

    2016-01-01

    The role of curricular activities for the formation of education, health and behavioural outcomes has been widely studied. Yet, the role of extra-curricular activities has received little attention. This study analyzes the effect of participation in sports clubs—one of the most popular extra-curricular activities among children. We use alternative datasets and flexible semi-parametric estimation methods with a specific way to use the panel dimension of the data to address selection into sports. We find positive and robust effects on children’s school performance and peer relations. Crowding out of passive leisure activities can partially explain the effects. PMID:27144474

  20. MARKETING STRATEGY IN SPORTS SPONSORSHIP

    Directory of Open Access Journals (Sweden)

    Srećko Novaković

    2012-09-01

    Full Text Available Sponsorship, as a very successful form of marketing, is quite common in sports. Thanks to the financial means which come from sponsorship, sports teams and individuals achieve top results. In return for that, sponsors take advantage by enhancing their brand and image for longer period. An extensive influence of sponsorship over sports development has been achieved through properly selected elements of sports strateg.y

  1. THE HEURISTIC FUNCTION OF SPORT

    Directory of Open Access Journals (Sweden)

    Adam Petrović

    2012-09-01

    Full Text Available Being a significant area of human activity, sport has multiple functions. One of the more important functions of sport, especially top sport, is the inventive heuristic function. Creative work, being a process of creating new values, represents a significant possibility for advancement of sport. This paper aims at pointing at the various dimensions of human creative work, at the creative work which can be seen in sport (in a narrow sense and at the scientific and practical areas which borderline sport. The method of theoretical analysis of different approaches to the phenomenon of creative work , both in general and in sport, was applied in this paper. This area can be systematized according to various criterion : the level of creative work, different fields where it appears, the subjects of creative work - creators etc. Case analysis shows that the field of creative work in sport is widening and deepening constantly. There are different levels of creativity not only in the system of training and competition, but in a wider social context of sport as well. As a process of human spirit and mind the creative work belongs not just to athletes and coaches, but also to all the people and social groups who's creative power manifests itself in sport. The classification of creative work in sport according to various criterion allows for heuristic function of sport to be explained comprehensively and to create an image how do the sparks of human spirit improve the micro cosmos of sport. A thorough classification of creative work in sport allows for a detailed analysis of all the elements of creative work and each of it’s area in sport. In this way the progress in sport , as a consequence of innovations in both competitions and athletes’ training and of everything that goes with those activities, can be guided into the needed direction more easily as well as studied and applied.

  2. 75 FR 75363 - Absence and Leave; Sick Leave

    Science.gov (United States)

    2010-12-03

    ... who might become ill as a result of exposure to a patient or employee with the H1N1 virus. A new leave... examination or treatment. OPM's Authority To Regulate Advanced Sick Leave Two agencies opposed allowing... leave that an employee may use for his or her own medical, dental, or optical examination or treatment...

  3. Hall penetration of a magnetic field into a uniform conductor

    International Nuclear Information System (INIS)

    Gordeev, A.V.

    1992-01-01

    It is shown that magnetic fields can convect into a uniform conductor due to the breakdown of quasineutrality associated with the Hall field. The nonlinear equation describing this process is derived and studied. 9 refs., 2 figs

  4. Quantum Hall Ferroelectrics and Nematics in Multivalley Systems

    Science.gov (United States)

    Sodemann, Inti; Zhu, Zheng; Fu, Liang

    2017-10-01

    We study broken symmetry states at integer Landau-level fillings in multivalley quantum Hall systems whose low-energy dispersions are anisotropic. When the Fermi surface of individual pockets lacks twofold rotational symmetry, like in bismuth (111) [Feldman et al. , Observation of a Nematic Quantum Hall Liquid on the Surface of Bismuth, Science 354, 316 (2016), 10.1126/science.aag1715] and in Sn1 -xPbxSe (001) [Dziawa et al., Topological Crystalline Insulator States in Pb1 -xSnxSe , Nat. Mater. 11, 1023 (2012), 10.1038/nmat3449] surfaces, interactions tend to drive the formation of quantum Hall ferroelectric states. We demonstrate that the dipole moment in these states has an intimate relation to the Fermi surface geometry of the parent metal. In quantum Hall nematic states, like those arising in AlAs quantum wells, we demonstrate the existence of unusually robust Skyrmion quasiparticles.

  5. High Throughput Hall Thruster for Small Spacecraft, Phase II

    Data.gov (United States)

    National Aeronautics and Space Administration — Busek is developing a high throughput nominal 100-W Hall Effect Thruster. This device is well sized for spacecraft ranging in size from several tens of kilograms to...

  6. Performance of an 8 kW Hall Thruster

    National Research Council Canada - National Science Library

    Pote, B

    2000-01-01

    ... in addition to high Isp for station keeping. To satisfy these requirements, Busek Co. embarked on the development of a novel, high power Hall thruster, capable of efficient operation over a broad range of Isp and thrust...

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

    National Research Council Canada - National Science Library

    Walker, Quentin E; Cappelli, Mark A; Hargus, William A

    2007-01-01

    ... to a surrogate anode from the plume of low power arcjets operating on hydrogen and helium, and then demonstrate the first successful operation of a low power Hall thruster-arcjet neutralizer package...

  8. Measuring the Hall weighting function for square and cloverleaf geometries

    Science.gov (United States)

    Scherschligt, Julia K.; Koon, Daniel W.

    2000-02-01

    We have directly measured the Hall weighting function—the sensitivity of a four-wire Hall measurement to the position of macroscopic inhomogeneities in Hall angle—for both a square shaped and a cloverleaf specimen. Comparison with the measured resistivity weighting function for a square geometry [D. W. Koon and W. K. Chan, Rev. Sci. Instrum. 69, 12 (1998)] proves that the two measurements sample the same specimen differently. For Hall measurements on both a square and a cloverleaf, the function is nonnegative with its maximum in the center and its minimum of zero at the edges of the square. Converting a square into a cloverleaf is shown to dramatically focus the measurement process onto a much smaller portion of the specimen. While our results agree qualitatively with theory, details are washed out, owing to the finite size of the magnetic probe used.

  9. What do you measure when you measure the Hall effect?

    Science.gov (United States)

    Koon, D. W.; Knickerbocker, C. J.

    1993-02-01

    A formalism for calculating the sensitivity of Hall measurements to local inhomogeneities of the sample material or the magnetic field is developed. This Hall weighting function g(x,y) is calculated for various placements of current and voltage probes on square and circular laminar samples. Unlike the resistivity weighting function, it is nonnegative throughout the entire sample, provided all probes lie at the edge of the sample. Singularities arise in the Hall weighting function near the current and voltage probes except in the case where these probes are located at the corners of a square. Implications of the results for cross, clover, and bridge samples, and the implications of our results for metal-insulator transition and quantum Hall studies are discussed.

  10. Iodine Hall Thruster for Space Exploration, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — Busek Co Inc proposes to develop a high power (high thrust) electric propulsion system featuring an iodine fueled Hall Effect Thruster (HET). The system to be...

  11. Magnetohydrodynamic simulations of Gamble I POS with Hall effect

    International Nuclear Information System (INIS)

    Roderick, N.F.; Frese, M.H.; Peterkin, R.E.; Payne, S.S.

    1989-01-01

    Two dimensional single fluid magnetohydrodynamic simulations have been conducted to investigate the effects of the Hall electric field on magnetic field transport in plasma opening switches of the type used on Gamble I. The Hall terms were included in the magnetic field transport equation in the two dimensional simulation code MACH2 through the use of a generalized Ohm's law. Calculations show the Hall terms augment the field transport previously observed to occur through ion fluid motion and diffusion. For modest values of microturbulent collision frequency, board current channels were observed . Results also show the magnetic field transport to be affected by the cathode boundary conditions with the Hall terms included. In all cases center of mass motion was slight

  12. Magnesium Hall Thruster for Solar System Exploration, Phase II

    Data.gov (United States)

    National Aeronautics and Space Administration — The innovation being developed in this program is a Mg Hall Effect Thruster system that would open the door for In-Situ Resource Utilization based solar system...

  13. Hall Mobility of Amorphous Ge2Sb2Te5

    National Research Council Canada - National Science Library

    Baily, S. A; Emin, David; Li, Heng

    2006-01-01

    The electrical conductivity, Seebeck coefficient, and Hall coefficient of 3 micron thick films of amorphous Ge2Sb2Te5 have been measured as functions of temperature from room temperature down to as low as 200 K...

  14. Quantum Computing With Quasiparticles of the Fractional Quantum Hall Effect

    National Research Council Canada - National Science Library

    Averin, Dmitri

    2001-01-01

    The focus of this project was the theoretical study of quantum computation based on controlled transfer of individual quasiparticles in systems of quantum antidots in the regime of the Fractional Quantum Hall Effect (FQHE...

  15. Low Temperature Hall Measurements of Neutron Irradiated Silicon Carbide

    National Research Council Canada - National Science Library

    Bonavita, Ange1o

    2004-01-01

    .... No features suggesting annealing were found below a temperature of 340K. Temperature dependant Hall effect measurements were taken over a range of 100K to 340K recording resistivity, carrier densities, and mobility...

  16. Simultaneous effects of Hall and convective conditions on peristaltic ...

    Indian Academy of Sciences (India)

    stress fluid in an inclined asymmetric channel with convective conditions. Soret and Dufour and Hall effects are taken into account. Analysis has been carried out in a wave frame of reference. Expressions for velocity, pressure gradient, temperature ...

  17. High Input Voltage Hall Thruster Discharge Converter, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — The overall scope of this Phase I/II effort is the development of a high efficiency 15kW (nominal) Hall thruster discharge converter. In Phase I, Busek Co. Inc. will...

  18. A High Performance Cathode Heater for Hall Thrusters, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — High current hollow cathodes are the baseline electron source for next generation high power Hall thrusters. Currently for electron sources providing current levels...

  19. Hall effects and related phenomena in disordered Rashba 2DEG

    International Nuclear Information System (INIS)

    Inoue, Jun-ichiro; Kato, Takashi; Bauer, Gerrit E W; Molenkamp, Laurens W

    2009-01-01

    We review our recent work on the spin and anomalous Hall effects and other related phenomena caused by the intrinsic spin–orbit interaction. We focus our attention on disorder effects on these transport properties by adopting a model of a two-dimensional electron gas with a Rashba-type spin–orbit interaction. A spin-polarized model is adopted to calculate the anomalous Hall effect and anisotropic magnetoresistance. It is shown that the spin Hall conductivity in the ballistic transport regime is cancelled by the so-called vertex corrections for the disorder scattering, and that the anomalous Hall conductivity and anisotropic magnetoresistance vanish unless the lifetime is spin dependent. We further present results on spin accumulation under an electric field

  20. Dual Mode Low Power Hall Thruster, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — Sample and return missions desire and missions like Saturn Observer require a low power Hall thruster that can operate at high thrust to power as well as high...

  1. Positive operator valued measures and the quantum Monty Hall problem

    Directory of Open Access Journals (Sweden)

    Claudia Zander

    2006-09-01

    Full Text Available A quantum version of the Monty Hall problem, based upon the Positive Operator Valued Measures (POVM formalism, is proposed. It is shown that basic normalization and symmetry arguments lead univocally to the associated POVM elements, and that the classical probabilities associated with the Monty Hall scenario are recovered for a natural choice of the measurement operators.Uma visão quântica do problema Monty Hall é proposta baseada no formalismo das Medidas Avaliadas do Operador Positivo (POVM. Demonstra-se que os argumentos de normalização básica e simetria levam de maneira inequívoca para elementos associados a POVM e que as probabilidades clássicas associadas ao cenário Monty Hall são recuperadas para uma escolha natural de medidas operadoras.

  2. High Throughput Hall Thruster for Small Spacecraft Project

    Data.gov (United States)

    National Aeronautics and Space Administration — Busek Co. Inc. proposes to develop a high throughput, nominal 100 W Hall Effect Thruster (HET). This HET will be sized for small spacecraft (< 180 kg), including...

  3. Imaging of Low Compressibility Strips in the Quantum Hall Liquid

    OpenAIRE

    Finkelstein, G.; Glicofridis, P. I.; Tessmer, S. H.; Ashoori, R. C.; Melloch, M. R.

    1999-01-01

    Using Subsurface Charge Accumulation scanning microscopy we image strips of low compressibility corresponding to several integer Quantum Hall filling factors. We study in detail the strips at Landau level filling factors $\

  4. Observation of the anomalous Hall effect in GaAs

    International Nuclear Information System (INIS)

    Miah, M Idrish

    2007-01-01

    Devices for the direct detection of the spin current, based on the anomalous Hall effect (AHE), are fabricated on n-type GaAs bulk semiconductor materials. The AHE is observed in the device when the photoinduced spin-polarized electrons are injected into it, and it is found that the effect depends on the applied electric field. The origin of the field-dependent observed Hall effect is discussed based on the D'yakonov-Perel' (DP) spin relaxation mechanism. The spin-dependent Hall effect is also found to be enhanced with increasing doping concentration. The present experimental results might have potential applications in semiconductor spintronic devices since the effect is closely related to the spin Hall effect

  5. Observation of the anomalous Hall effect in GaAs

    Energy Technology Data Exchange (ETDEWEB)

    Miah, M Idrish [Nanoscale Science and Technology Centre, School of Science, Griffith University, Nathan, Brisbane, QLD 4111 (Australia); Department of Physics, University of Chittagong, Chittagong, Chittagong - 4331 (Bangladesh)

    2007-03-21

    Devices for the direct detection of the spin current, based on the anomalous Hall effect (AHE), are fabricated on n-type GaAs bulk semiconductor materials. The AHE is observed in the device when the photoinduced spin-polarized electrons are injected into it, and it is found that the effect depends on the applied electric field. The origin of the field-dependent observed Hall effect is discussed based on the D'yakonov-Perel' (DP) spin relaxation mechanism. The spin-dependent Hall effect is also found to be enhanced with increasing doping concentration. The present experimental results might have potential applications in semiconductor spintronic devices since the effect is closely related to the spin Hall effect.

  6. Iodine Hall Thruster for Space Exploration, Phase II

    Data.gov (United States)

    National Aeronautics and Space Administration — In the Phase I program, Busek Co. Inc. tested an existing Hall thruster, the BHT-8000, on iodine propellant. The thruster was fed by a high flow iodine feed system,...

  7. 2D Electrostatic Potential Solver for Hall Thruster Simulation

    National Research Council Canada - National Science Library

    Koo, Justin W

    2006-01-01

    ...) for Hall thruster simulation. It is based on a finite volume discretization of a current conservation equation where the electron current density is described by a Generalized Ohm's law description...

  8. Quantum Theory of Conducting Matter Superconductivity and Quantum Hall Effect

    CERN Document Server

    Fujita, Shigeji; Godoy, Salvador

    2009-01-01

    Explains major superconducting properties including zero resistance, Meissner effect, sharp phase change, flux quantization, excitation energy gap, and Josephson effects using quantum statistical mechanical calculations. This book covers the 2D superconductivity and the quantum Hall effects

  9. Magnesium Hall Thruster for Solar System Exploration, Phase I

    Data.gov (United States)

    National Aeronautics and Space Administration — Busek proposes to prove the feasibility of a Mg Hall effect thruster system that would open the door for In-Situ Resource Utilization (ISRU) based solar system...

  10. The integer quantum hall effect revisited

    Energy Technology Data Exchange (ETDEWEB)

    Michalakis, Spyridon [Los Alamos National Laboratory; Hastings, Matthew [Q STATION, CALIFORNIA

    2009-01-01

    For T - L x L a finite subset of Z{sup 2}, let H{sub o} denote a Hamiltonian on T with periodic boundary conditions and finite range, finite strength intetactions and a unique ground state with a nonvanishing spectral gap. For S {element_of} T, let q{sub s} denote the charge at site s and assume that the total charge Q = {Sigma}{sub s {element_of} T} q{sub s} is conserved. Using the local charge operators q{sub s}, we introduce a boundary magnetic flux in the horizontal and vertical direction and allow the ground state to evolve quasiadiabatically around a square of size one magnetic flux, in flux space. At the end of the evolution we obtain a trivial Berry phase, which we compare, via a method reminiscent of Stokes Theorem. to the Berry phase obtained from an evolution around an exponentially small loop near the origin. As a result, we show, without any averaging assumption, that the Hall conductance is quantized in integer multiples of e{sup 2}/h up to exponentially small corrections of order e{sup -L/{zeta}}, where {zeta}, is a correlation length that depends only on the gap and the range and strength of the interactions.

  11. Hall MHD reconnection in cometary magnetotail

    International Nuclear Information System (INIS)

    Jovanovic, Dusan; Shukla, Padma Kant; Morfill, Gregor

    2005-01-01

    The fine structure of cometary tails (swirls, loops and blobs) is studied in the framework of resistive magnetic reconnection without a guide field in a dusty plasma. For a high-beta plasma (β ∼ 1) consisting of electrons, ions, and immobile dust grains, a two-fluid description is used to study electromagnetic perturbations with the frequency below Ωi, propagating at an arbitrary angle, and including the effects of Hall current. A zero-order current associated with the anti-parallel magnetic configuration may exist even in the limit of zero plasma temperature in a dusty plasma due to a symmetry breaking between electrons and ions by dust grains that yields an E-vector x B-vector current. In the perturbed state, a new linear electromagnetic mode is found in dusty plasma which is evanescent below the Rao cut-off frequency and has the characteristic wavelength comparable to the ion skin depth, which enables the reconnection at short spatial scales. The role of the dust is found to be twofold, yielding a new mode outside of the current sheet and altering the continuity conditions at its edge by an inhomogeneous Doppler shift associated with the E-vector x B-vector current

  12. Brand new hall in the main building

    CERN Multimedia

    Corinne Pralavorio

    2014-01-01

    The renovation of the UNIQA and post office premises is getting under way, with their reopening scheduled for the spring.   The renovation of the large hall in the main building (Building 500) has finally reached the home straight. As of this week, building contractors will get to work on the last part – the offices of UNIQA and La Poste. In the last week of November, the two concessions moved their offices across Route Scherrer to the same part of Building 510 where UBS was temporarily housed during the bank’s refurbishment. Their services were therefore unavailable for one day. The renovation work will last until the spring, with the new offices expected to open in May 2015. Between now and then, the windows and insulation will be completely refitted, with a view to reducing heat loss considerably, and, above all, the premises will be modernised to improve customer reception and service. For example, UNIQA’s new premises will feature a confidential area, guarantee...

  13. Following the Path Blazed by Jan Hall

    Science.gov (United States)

    Hollberg, Leo

    It was a great pleasure to gather with friends in August 2004 for the symposium honoring Jan Hall and celebrating his 70th birthday, and this book provides a unique opportunity to record some words commemorating Jan's incredible contributions to science and to our lives. At best, my recollections are a faded, myopic snapshot of some events that come to mind after many years of association with Jan. Reflecting on the years that have passed since I first entered Jan's lab, I see that many things have changed, technology has advanced (mostly for the better), the world has evolved in dramatic and significant ways (some good and some not), and I have grown older (but unfortunately not wiser as one might have hoped). Nonetheless, after many years, I find myself still following the path pointed out by Jan's visions and investing most of my productive time and energy working as a scientist trying to get atoms, lasers, electronics, (and the institutional bureaucracy that comes along with them) to work in some kind of harmony…

  14. Acoustics in Halls for Speech and Music

    Science.gov (United States)

    Gade, Anders C.

    This chapter deals specifically with concepts, tools, and architectural variables of importance when designing auditoria for speech and music. The focus will be on cultivating the useful components of the sound in the room rather than on avoiding noise from outside or from installations, which is dealt with in Chap. 11. The chapter starts by presenting the subjective aspects of the room acoustic experience according to consensus at the time of writing. Then follows a description of their objective counterparts, the objective room acoustic parameters, among which the classical reverberation time measure is only one of many, but still of fundamental value. After explanations on how these parameters can be measured and predicted during the design phase, the remainder of the chapter deals with how the acoustic properties can be controlled by the architectural design of auditoria. This is done by presenting the influence of individual design elements as well as brief descriptions of halls designed for specific purposes, such as drama, opera, and symphonic concerts. Finally, some important aspects of loudspeaker installations in auditoria are briefly touched upon.

  15. SPORTS JOURNALISM AND MEDIA RESEARCH

    Directory of Open Access Journals (Sweden)

    Velizar Sredanović

    2008-08-01

    Full Text Available Communicology theoreticians, sociologists, and sports experts strive to explain significance of sport, power and influence of media (TV in particular and sports journalism through analysis of media and viewers. Phenomena observed on number of football (soccer and Olympic games through a prism of media research of the Television of Montenegro.

  16. Energy Expenditure of Sport Stacking

    Science.gov (United States)

    Murray, Steven R.; Udermann, Brian E.; Reineke, David M.; Battista, Rebecca A.

    2009-01-01

    Sport stacking is an activity taught in many physical education programs. The activity, although very popular, has been studied minimally, and the energy expenditure for sport stacking is unknown. Therefore, the purposes of this study were to determine the energy expenditure of sport stacking in elementary school children and to compare that value…

  17. The Sport-Stress Connection.

    Science.gov (United States)

    Santomier, James

    1983-01-01

    This article explains how and why stress mechanisms operate in students who participate in sports. Students respond to different sport situations with various physical, psychological, and social reactions. When developing and supervising sports, school personnel should take into consideration the physical and psychological development of…

  18. Sport-related maxillofacial fractures

    NARCIS (Netherlands)

    Ruslin, M.; Boffano, P.; ten Brincke, Y.J.D.; Forouzanfar, T.; Brand, H.S.

    2016-01-01

    Sports and exercise are important causes of maxillofacial injuries. Different types of sports might differ in frequency and type of fractures. The aim of the present study was to explore the possible relation between the types of sport practiced and the frequency and nature of the facial bone

  19. Opvoeding in en door sport?

    NARCIS (Netherlands)

    Buisman, Albert

    2005-01-01

    2004 is the European Year of Education through Sport. The European Commission believes that sport is a valuable instrument in creating more open and tolerant societies. Therefore it is necessary that sport and its values play a greater part in education. This article examines the relationship

  20. What is the Hallé? | Smith | Philosophical Papers

    African Journals Online (AJOL)

    I address what I call 'the number issue', which is raised by our ordinary talk and beliefs about certain social groups and institutions, and I take the Hallé orchestra as my example. The number issue is that of whether the Hallé is one individual or several individuals. I observe that if one holds that it is one individual, one faces ...

  1. Energy Spectrum and Quantum Hall Effect in Twisted Bilayer Graphene

    OpenAIRE

    Moon, Pilkyung; Koshino, Mikito

    2012-01-01

    We investigate the electronic spectra and quantum Hall effect in twisted bilayer graphenes with various rotation angles under magnetic fields, using a model rigorously including the interlayer interaction. We describe the spectral evolution from discrete Landau levels in the weak field regime to the fractal band structure in the strong field regime, and estimate the quantized Hall conductivity for each single gap. In weak magnetic fields, the low-energy conduction band of the twisted bilayer ...

  2. The Hall Effect in Hydrided Rare Earth Films

    Science.gov (United States)

    Koon, D. W.; Azofeifa, D. E.; Clark, N.

    We describe two new techniques for measuring the Hall effect in capped rare earth films during hydriding. In one, we simultaneously measure resistivity and the Hall coefficient for a rare earth film covered with four different thicknesses of Pd, recovering the charge transport quantities for both materials. In the second technique, we replace Pd with Mn as the covering layer. We will present results from both techniques.

  3. Spin and Isospin: Exotic Order in Quantum Hall Ferromagnets

    Science.gov (United States)

    Girvin, Steven M.

    Quantum mechanics is a strange business, and the quantum physics of strongly correlated many-electron systems can be stranger still. Good examples are the various quantum Hall effects. They are among the most remarkable many-body quantum phenomena discovered in the second half of the 20th century, comparable in intellectual import to superconductivity and superfluidity. The quantum Hall effects are an extremely rich set of phenomena with deep and truly fundamental theoretical implications...

  4. The Quantum Hall Effect: Novel Excitations and Broken Symmetries

    OpenAIRE

    Girvin, Steven M.

    1999-01-01

    These pedagogical lecture notes present a general introduction to most aspects of the integer and fractional quantum Hall effects. This is followed by an extensive discussion of quantum Hall ferromagnetism, both for spins in single-layer systems and `pseudospins' in double-layer systems. The effective field theories describing various broken symmetry states and `skyrmion' and `meron' spin textures are derived and discussed in some detail. Pedagogical presentations on Berry phases and lowest L...

  5. Project of industrial hall with a bridge crane

    OpenAIRE

    Ambrožič, Klemen

    2014-01-01

    In graduation thesis design of steel industrial hall with a bridge crane is performed. The first chapter contains technical report of the structure. Followed by the second chapter, which analyzes bridge crane and crane track. The influences of bridge crane are determined. These influences are considered for design of the crane track, fatigue check and displacements of the crane supporting structure. Fatigue check contains basic detail. The third chapter contains analysis of the hall supportin...

  6. Iodine Plasma Species Measurements in a Hall Effect Thruster Plume

    Science.gov (United States)

    2013-05-01

    from a 200 W Hall Effect Thruster fueled by iodine vapor was analyzed. The plasma source included a laboratory propellant feed system and a laboratory...distribution is unlimited Abstract • The plasma plume from a 200 W Hall Effect Thruster fueled by iodine vapor was analyzed. • The plasma source... pressure with I2 – Plume divergence lower with I2 – Dimers (I2+) measured at beam centroid (a few %) Iodine Xenon 7 Distribution A: Approved for public

  7. Sports Journalism and the Quality of Sport and Sport Culture in Romania

    OpenAIRE

    Cristian GHENA

    2014-01-01

    The issue of recognition of a sports journalism as a quality component of social life that can positively influence the sports and its perception by the population is omnipresent in contemporary society in Romania.

  8. Anisotropic intrinsic spin Hall effect in quantum wires

    International Nuclear Information System (INIS)

    Cummings, A W; Akis, R; Ferry, D K

    2011-01-01

    We use numerical simulations to investigate the spin Hall effect in quantum wires in the presence of both Rashba and Dresselhaus spin-orbit coupling. We find that the intrinsic spin Hall effect is highly anisotropic with respect to the orientation of the wire, and that the nature of this anisotropy depends strongly on the electron density and the relative strengths of the Rashba and Dresselhaus spin-orbit couplings. In particular, at low densities, when only one subband of the quantum wire is occupied, the spin Hall effect is strongest for electron momentum along the [1-bar 10] axis, which is the opposite of what is expected for the purely 2D case. In addition, when more than one subband is occupied, the strength and anisotropy of the spin Hall effect can vary greatly over relatively small changes in electron density, which makes it difficult to predict which wire orientation will maximize the strength of the spin Hall effect. These results help to illuminate the role of quantum confinement in spin-orbit-coupled systems, and can serve as a guide for future experimental work on the use of quantum wires for spin-Hall-based spintronic applications. (paper)

  9. Spin Hall effect and spin swapping in diffusive superconductors

    Science.gov (United States)

    Espedal, Camilla; Lange, Peter; Sadjina, Severin; Mal'shukov, A. G.; Brataas, Arne

    2017-02-01

    We consider the spin-orbit-induced spin Hall effect and spin swapping in diffusive superconductors. By employing the nonequilibrium Keldysh Green's function technique in the quasiclassical approximation, we derive coupled transport equations for the spectral spin and particle distributions and for the energy density in the elastic scattering regime. We compute four contributions to the spin Hall conductivity, namely, skew scattering, side jump, anomalous velocity, and the Yafet contribution. The reduced density of states in the superconductor causes a renormalization of the spin Hall angle. We demonstrate that all four of these contributions to the spin Hall conductivity are renormalized in the same way in the superconducting state. In its simplest manifestation, spin swapping transforms a primary spin current into a secondary spin current with swapped current and polarization directions. We find that the spin-swapping coefficient is not explicitly but only implicitly affected by the superconducting gap through the renormalized diffusion coefficients. We discuss experimental consequences for measurements of the (inverse) spin Hall effect and spin swapping in four-terminal geometries. In our geometry, below the superconducting transition temperature, the spin-swapping signal is increased an order of magnitude while changes in the (inverse) spin Hall signal are moderate.

  10. Shear-driven Instabilities in Hall-magnetohydrodynamic Plasmas

    Science.gov (United States)

    Bejarano, Cecilia; Gómez, Daniel O.; Brandenburg, Axel

    2011-08-01

    The large-scale dynamics of plasmas is well described within the framework of magnetohydrodynamics (MHD). However, whenever the ion density of the plasma becomes sufficiently low, the Hall effect is likely to become important. The role of the Hall effect has been studied in several astrophysical plasma processes, such as magnetic reconnection, magnetic dynamo, MHD turbulence, or MHD instabilities. In particular, the development of small-scale instabilities is essential to understand the transport properties in a number of astrophysical plasmas. The magneto-rotational instability (MRI), which takes place in differentially rotating accretion disks embedded in relatively weak magnetic fields, is just one example. The influence of the large-scale velocity flows on small-scale instabilities is often approximated by a linear shear flow. In this paper, we quantitatively study the role of the Hall effect on plasmas embedded in large-scale shear flows. More precisely, we show that an instability develops when the Hall effect is present, which we therefore term as the Hall magneto-shear instability. As a particular case, we recover the so-called MRI and quantitatively assess the role of the Hall effect on its development and evolution.

  11. Volunteers in Sport Organizations

    Directory of Open Access Journals (Sweden)

    VESNA CILERDZIC

    2010-01-01

    Full Text Available The research is done in order to describe student’s attitudes on volunteering in sport. The sample consists of 231 students from Serbia, average age 21,06±3,12years. They were from eight colleges and faculties. For nominal and ordinal variables, frequencies were determined. Many of examined students have volunteering experiences. The results confirm that students believe that we live in a society which his generally thought only to its own benefit; they think that volunteering can not solve the problems in society; that people do not have enough experience with volunteering and people do not have time to volunteering; volunteering is for young people; in their family and among friends, there are no volunteers; everyone could be volunteer only if that wishes; do not believe that volunteering is a waste of time and it helps in future career. The prevalent number of students, regardless of the Faculty which they belong, rarely volunteered in areas outside of sport. Results also shows that students from sport faculties have less experience in volunteering in sport than students from other faculties, but this difference is not dramatic.

  12. Sport-Related Concussions

    Science.gov (United States)

    Brady, Don; Brady, Flo

    2011-01-01

    Sport-related concussions (SRC) are not limited to specific age ranges, professional athletes, or gender. The primary focus of much of SRC research pertains to the assessment, management, and return to play (RTP) of the concussed athlete. This article highlights some major issues of SRC along with some controversies that presently exist within the…

  13. MARKETING MIX IN SPORT

    Directory of Open Access Journals (Sweden)

    Srećko Novaković

    2011-03-01

    Full Text Available Marketing mix'' along the term of life cycle has robbed the trademark for the conception of marketing and the market direction of company, corporations and institutions. Essence marketing-mixa is in the simultaneous determining of the target market group of consumer (the buyer or stays the public and specially prepared and the coordinated impact of elements mixa, and this is the product, price, distributions and graduation ceremonies. Given that is mix combinations of verified variables, companies he use in order to would achieve are wished the scope sales on the target market. In the wider context significant influence of environment on the chosen structure marketing-mixa have not only technological, economic and competitive services already and socially-owned, legislative, legal and political services. From those reasons chant the marketing -mixa occasionally replaces expression are coordinated term acts on the market. Elements marketing-mix-and at sport marketings same are as well as at marketings every other activity. They contain the sportively product and the service, appreciate the sport product and services, distribution of sport product and services and the promotion of sport product and services.

  14. FUNDRAISING IN SPORT

    Directory of Open Access Journals (Sweden)

    Milica Radović

    2006-06-01

    Full Text Available Fundrising is the kind of marketing strategy, which the main gool is to provide the money and the other resources. It is the moust important tasks of nonprofit organizacio( sport organiyation and the other organiyation which need money for development project. Fundraising is independent and sistematical way of compilation the financial resource and anather keind of help in nonprofit organization from the private persone, the enterprice, the associate ect.Fundraising enable the activity and realization projects. Aim of this working paper is to givs contibution these important problem of menagement, to explain it and apply it in sport. Today it we haven`t enought the financial resourceies, without activity to provide it, we will very quickly loss sympathy and support who could help as. Financial problems are present not only in the sport organization , but in the culture, social, eco, education and other organizations. Todey there is strong competition at the fundraising market. Sport has advantages in the mass actions frequently and in his places in the psyche and body development people in all of growth, rather then the another nonprofit organization. Fundraising provide a lot of many and create pozitive image in public environment

  15. Burnout in Youth Sports.

    Science.gov (United States)

    Rotella, Robert J.; And Others

    1991-01-01

    Burnout is a condition of withdrawal from participation in sports as a result of stress. The most significant advance in the study of burnout has been a cognitive-affective model that contains situational, cognitive appraisal, physiological, and behavioral components. Suggestions for preventing and treating burnout are presented. (BC)

  16. The Economics of Sports.

    Science.gov (United States)

    Kern, William S., Ed.

    This collection of papers presents a picture of economic principles at work in the dynamic world of big-time sports. Papers were given at the 35th Annual Lecture-Seminar Series presented by the Department of Economics at Western Michigan University during the 1998-99 school year. After an "Introduction" (William S. Kern), the six papers…

  17. Sports Injuries in Children.

    Science.gov (United States)

    Taft, Timothy N.

    1991-01-01

    A literature review revealed an absence of well-controlled studies concerning the prevention of sports injuries in children. A checklist outlines some causes of the overuse syndrome, including (1) training errors; (2) the nature of playing surfaces; (3) muscle imbalance; (4) anatomic malalignments; (5) construction of shoes; and (6) various…

  18. Sports Teams Extend Reach

    Science.gov (United States)

    Shah, Nirvi

    2012-01-01

    Unlike traditional high school athletic teams, Unified Sports teams are designed to immerse students with intellectual disabilities in a facet of school culture that has largely eluded them. Nationwide, more than 2,000 schools in 42 states have the teams, where the ideal is for about half the athletes on each team to be students with intellectual…

  19. Mathematics and Sports

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 4; Issue 12. Mathematics and Sports. Vivek S Borkar. Book Review Volume 4 Issue 12 December 1999 pp 107-108. Fulltext. Click here to view fulltext PDF. Permanent link: http://www.ias.ac.in/article/fulltext/reso/004/12/0107-0108. Author Affiliations.

  20. Nutrition in Children's Sports.

    Science.gov (United States)

    Smith, Nathan J.

    Young athletes need to be aware of the importance of good nutrition to athletic performance. A basic diet plan, worked out with a physician to satisfy energy and weight needs, is essential. The best eating schedule and amount and type of food varies with different sports depending on the intensity and duration of physical activity. Weight control…

  1. ABC of Sports Medicine*

    African Journals Online (AJOL)

    overuse injuries, osteoporosis and exercise, infections, the overtraining syndrome, sudden death, assessment of physical performance, nutritional aids, drug use, and team medical care. Included in the section on general topics are chapters on the benefits of exercise, sports for older persons and those with disabilities, ...

  2. Doping in sport

    African Journals Online (AJOL)

    Objective. To determine the attitudes, beliefs and knowledge of talented young athletes residing in Gauteng regarding prohibited performance-enhancing drugs (PEDs) and anti-doping rules and regulations. Methods. This was a survey study using a quantitative research approach. South African TuksSport academy ...

  3. Defending College Sports.

    Science.gov (United States)

    Blum, Debra E.

    1994-01-01

    A philosophy professor who supports college athletics battles to maintain credibility among his academic peers. His interest is in adding balance to criticism of college sports and calling attention to positive aspects such as teamwork and discipline. The professor also teaches a seminar in ethics for first-year athletes. (MSE)

  4. Sport og etik

    DEFF Research Database (Denmark)

    Møller, Rasmus Bysted

    Sportsidealismens grundsyn på forholdet mellem sport og moral har længe domineret sportsetikken. Opfattelsen, der går ud på, at sporten udgør frugtbar jord for dyrkelse af et moralsk sindelag, fordi sporten indeholder en moralsk dimension i kraft af sin egen-natur, understøttes ikke af den...... forholdet mellem sport og moral kom således til at bekræfte og delvist forklare empirien på området. Endeligt kunne sportsidealismens hovedtese tilbagevises, for så vidt at den omhandler forholdet mellem sport og moral i dette sidste ords moderne betydning. Dette skete i artiklens afsluttende fjerde afsnit......, hvor forskellen mellem antik og moderne etik blev tydeliggjort. På baggrund af den præsenterede undersøgelse af forholdet mellem sport og moral kan vi konkludere, at sporten isoleret set ikke egner sig som arnested for udviklingen af et moralsk sindelag, idet sporten ikke indeholder den af...

  5. Simulation in Sport Finance

    Science.gov (United States)

    Drayer, Joris; Rascher, Dan

    2010-01-01

    Simulations have long been used in business schools to give students experience making real-world decisions in a relatively low risk environment. The OAKLAND A'S BASEBALL BUSINESS SIMULATOR takes a traditional business simulation and applies it to the sport industry, in which sales of tangible products are replaced by sales of experiences provided…

  6. Sport in China.

    Science.gov (United States)

    Knuttgen, Howard G., Ed.; And Others

    Part 1 of this book, "Evoluation and Organization of Physical Culture," examines the history and current organization of physical education and sport in the People's Republic of China. This part includes chapters on: the evolution and organization of physical culture; physical culture in China today; the organizational structure of…

  7. Rapportage sport 2003

    NARCIS (Netherlands)

    Breedveld, K.; Meulen, R. van der; Hildebrandt, V.; Harms, L.; Goossens, R.; Lucassen, J.; Ooijendijk, W.; Stiggelbout, M.; Poel, H. van der; Bottenburg, M. van

    2003-01-01

    De Rapportage Sport is een coproductie van het Sociaal Cultureel Planbureau, het Centraal Bureau voor Statistiek, NOC-NSF, TNO, de Universiteit van Tilburg en het W.J.H. Mulier Instituut. Het bestaat uit twee delen. In het eerste deel worden de ontwikkelingen beschreven op het terrein van het

  8. Sports, Race, and Ressentiment.

    Science.gov (United States)

    Dowling, William C.

    2000-01-01

    Discusses the problem of college sports corruption and the debate over "the plight of the black athlete," suggesting that this debate is actually not about race or athletics but a code for examining contradictions between education and mass democracy. Calls this the problem of "ressentiment." Examines how athletes have used the "plight of the…

  9. Drugs in sport

    National Research Council Canada - National Science Library

    Mottram, D. R. (David R.)

    2005-01-01

    ...-Doping Agency (WADA) Methods and advances in doping control, and the sanctions for testing positive The use of therapeutic drugs banned in sport Evaluation of the status of creatine as a legitimate nutritional supplement Ethical, political and administrative issues in monitoring drug use An assessment of the prevalence of drug taking in sp...

  10. AI Sport Forecast Software

    Directory of Open Access Journals (Sweden)

    Kiyomi Cerezo Takahash

    2008-12-01

    Full Text Available This article aims to explain the development of an application whose function is to predict the results of different sporting encounters. To do this an analysis of the influential factors, algorithms and technology implemented, will be carried out.

  11. Saved Leave Scheme (SLS) : Simplified procedure for the transfer of leave to saved leave accounts

    CERN Multimedia

    HR Division

    2001-01-01

    As part of the process of streamlining procedures, the HR and AS Divisions have jointly developed a system whereby annual and compensatory leave will henceforth be automatically transferred1) to saved leave accounts. Under the provisions of the voluntary saved leave scheme (SLS), a maximum total of 10 days'2) annual and compensatory leave (excluding saved leave accumulated in accordance with the provisions of Administrative Circular No. 22 B) can be transferred to the saved leave account at the end of the leave year (30 September). Previously, every person taking part in the scheme has been individually issued with a form for the purposes of requesting the transfer of leave to the leave account and the transfer has then had to be done manually by HR Division. To streamline the procedure, unused leave of all those taking part in the saved leave scheme at the closure of of the leave-year accounts will henceforth be transferred automatically to the saved leave account on that date. This simplification is in the ...

  12. REMINDER Saved Leave Scheme (SLS) : Transfer of leave to saved leave accounts

    CERN Multimedia

    HR Division

    2002-01-01

    Under the provisions of the voluntary saved leave scheme (SLS), a maximum total of 10 days'*) annual and compensatory leave (excluding saved leave accumulated in accordance with the provisions of Administrative Circular No. 22B) can be transferred to the saved leave account at the end of the leave year (30 September). We remind you that, since last year, unused leave of all those taking part in the saved leave scheme at the closure of the leave-year accounts is transferred automatically to the saved leave account on that date. Therefore, staff members have no administrative steps to take. In addition, the transfer, which eliminates the risk of omitting to request leave transfers and rules out calculation errors in transfer requests, will be clearly shown in the list of leave transactions that can be consulted in EDH from October 2002 onwards. Furthermore, this automatic leave transfer optimizes staff members' chances of benefiting from a saved leave bonus provided that they are still participants in the schem...

  13. Sabbatical Leaves in Higher Education.

    Science.gov (United States)

    Eberle, August W.; Thompson, Robert E.

    This document presents a status report of various sabbatical leave policies and plans at 386 higher education institutions across the U.S. The report provides information that can serve as a guide for institutions that do not presently provide sabbatical leaves of absence or that can be compared with existing sabbatical leave plans. It was found…

  14. Imaging of orthopedic sports injuries

    International Nuclear Information System (INIS)

    Vanhoenacker, F.M.; Gielen, J.L.; Maas, M.

    2007-01-01

    This volume provides an updated review of imaging abnormalities in orthopedic sports injuries. The first part of the book contains background information on relevant basic science and general imaging principles in sports traumatology. The second part comprises a topographic discussion of sports injuries. Each chapter highlights the merit of different imaging techniques, focused on a specific clinical problem. In the third part, natural history, monitoring and follow-up by imaging are discussed. This well-illustrated book will be of value for musculoskeletal radiologists, orthopedic surgeons, sports physicians and everyone else involved in sports medicine. (orig.)

  15. SAFETY ASPECTS OF SPORTS COMPETITION

    Directory of Open Access Journals (Sweden)

    Srećko Novaković

    2011-09-01

    Full Text Available Sport, as an activity of public interest in contemporary conditions of life,has an important role in almost every state. Financial and security of participation of the state in the sports field, through the budgets of all levels are important issues regardless of the status and relationships of government and non-governmental organizations and sports associations. Cooperation and clear definition of security responsibilities between public authorities and sports clubs is essential and widely accepted phenomenon. The causes of conflict in sport competitions are polyvalent. It affects the study of this type of security phenomena that must be approached from different aspects. The causes of conflict in sports competitions may be direct and indirect, structural, economic - social, political and cultural - perceptual. All together they contribute to the occurrence of conflict and measuring the occurrence and development of modern security phenomenon in sport competitions

  16. Direct catastrophic injury in sports.

    Science.gov (United States)

    Boden, Barry P

    2005-11-01

    Catastrophic sports injuries are rare but tragic events. Direct (traumatic) catastrophic injury results from participating in the skills of a sport, such as a collision in football. Football is associated with the greatest number of direct catastrophic injuries for all major team sports in the United States. Pole vaulting, gymnastics, ice hockey, and football have the highest incidence of direct catastrophic injuries for sports in which males participate. In most sports, the rate of catastrophic injury is higher at the collegiate than at the high school level. Cheerleading is associated with the highest number of direct catastrophic injuries for all sports in which females participate. Indirect (nontraumatic) injury is caused by systemic failure as a result of exertion while participating in a sport. Cardiovascular conditions, heat illness, exertional hyponatremia, and dehydration can cause indirect catastrophic injury. Understanding the common mechanisms of injury and prevention strategies for direct catastrophic injuries is critical in caring for athletes.

  17. Knowledge, Attitudes, and Beliefs of Youth Sports Coaches Regarding Sport Volume Recommendations and Sport Specialization.

    Science.gov (United States)

    Post, Eric G; Trigsted, Stephanie M; Schaefer, Daniel A; Cadmus-Bertram, Lisa A; Watson, Andrew M; McGuine, Timothy A; Brooks, M Alison; Bell, David R

    2018-02-22

    Overuse injuries in youth athletes are becoming increasingly common which may be a result of the prevalence of year-round specialized sport participation. Previous research has identified sport volume recommendations related to months per year, hours per week, and simultaneous participation in multiple sports leagues. Coaches are a primary influence on a youth athlete's decision to specialize in a single sport. Therefore, identifying coaches' baseline beliefs and perceptions is important for developing strategies to educate coaches about safe sport participation. A total of 253 youth sport coaches (207 males) completed an anonymous online questionnaire regarding knowledge of sport volume recommendations and attitudes and beliefs regarding sport specialization. Eligible participants were required to serve as a head or assistant coach of a youth sport team in the past 12 months whose members were between the ages of 12 and 18. Most coaches were unaware of recommendations regarding the maximum number of months per year (79.4%), hours per week in one sport (79.3%), or number of simultaneous leagues for an athlete to participate in to reduce injury (77.6%). Fewer than half (43.2%) of all coaches were "very" or "extremely" concerned about the risk of injury in youth sports. A majority (60.1%) believed that sport specialization was either "quite a bit" or "a great deal" of a problem. Two-thirds (67.2%) responded that year-round participation in a single sport was either "very" or "extremely" likely to increase an athlete's risk of injury. Although the responses to this survey were predominantly from coaches from one state, our results suggest that coaches are unaware of sport volume recommendations but are concerned about specialization. Future efforts are needed to communicate these recommendations to coaches in order to reduce the risk of overuse injury in youth sports.

  18. Sanctions for doping in sport

    Directory of Open Access Journals (Sweden)

    Mandarić Sanja

    2014-01-01

    Full Text Available Top-level sport imposes new and more demanding physical and psychological pressures, and the desire for competing, winning and selfassertion leads athletes into temptation to use prohibited substances in order to achieve the best possible results. Regardless of the fact that the adverse consequences of prohibited substances are well-known, prestige and the need to dominate sports arenas have led to their use in sports. Doping is one of the biggest issues in sport today, and the fight against it is a strategic objective on both global and national levels. World Anti-Doping Agency, the International Olympic Committee, international sports federations, national anti-doping agencies, national sports federations, as well as governments and their repressive apparatuses are all involved in the fight against doping in sport. This paper points to a different etymology and phenomenology of doping, the beginnings of doping in sport, sports doping scandals as well as the most important international instruments regulating this issue. Also, there is a special reference in this paper to the criminal and misdemeanor sanctions for doping in sport. In Serbia doping in sport is prohibited by the Law on Prevention of Doping in Sports which came into force in 2005 and which prescribes the measures and activities aimed at prevention of doping in sport. In this context, the law provides for the following three criminal offenses: use of doping substances, facilitating the use of doping substances, and unauthorized production and putting on traffic of doping substances. In addition, aiming at curbing the abuse of doping this law also provides for two violations. More frequent and repetitive doping scandals indicate that doping despite long-standing sanctions is still present in sports, which suggests that sanctions alone have not given satisfactory results so far.

  19. Negotiating leave in the workplace

    DEFF Research Database (Denmark)

    Bloksgaard, Lotte

    In Denmark leave entitlement is not only regulated by law but is also part of the various collective agreements established in the respective occupational sectors and at the local workplace level. Consequently, Danish fathers have very different leave entitlements, depending on the sector, branch...... and workplace in which they are employed. The paper focuses on fathers’ negotiations of parental leave in three large Danish work places, offering men different opportunities for leave. With a focus on the differences in the work place contexts/opportunities for leave, the aim of the paper is firstly to explore...... men’s negotiations of parental leave at work place level and secondly, to explore and discuss how Danish fathers construct leave practices – and individual male identities – in the workplace....

  20. Living and Learning: "Does Residence Hall Roommate Placement of Traditional Freshman Students at MSOE Effect Their Satisfaction with the Residence Halls?"

    Science.gov (United States)

    Breese, William Ellis, II

    2012-01-01

    The purpose of this study is to examine if residence hall roommate placement of traditional freshman students at MSOE affects their satisfaction with the residence halls. The idea behind this study is that if residence hall roommate placement is done purposefully, with the participation of incoming freshmen through appropriate placement…

  1. Marketing management of sport and tourism - Introduction

    OpenAIRE

    Bieger, Thomas; Beritelli, Pietro

    2003-01-01

    Marketing Management of sport and tourism does not just mean marketing of touristic sport products. Marketing management of sport and tourism can be divided into marketing of sport activities, events or infrastructure for people outside the location and marketing of tourism through sport activities, events and sport infrastructure. A system approach is introduced to serve as a model for explaining interrelations between the different elements in the sport and tourism context. As such destinat...

  2. Paid Family Leave, Fathers' Leave-Taking, and Leave-Sharing in Dual-Earner Households

    OpenAIRE

    Bartel, Ann P.; Rossin-Slater, Maya; Ruhm, Christopher J.; Stearns, Jenna; Waldfogel, Jane

    2015-01-01

    This paper provides quasi-experimental evidence on the impact of paid leave legislation on fathers' leave-taking, as well as on the division of leave between mothers and fathers in dual-earner households. Using difference-in-difference and difference-in-difference-in-difference designs, we study California's Paid Family Leave (CA-PFL) program, which is the first source of government-provided paid parental leave available to fathers in the United States. Our results show that fathers in Califo...

  3. [Sports and osteoarthrosis].

    Science.gov (United States)

    Schäfer, M; Dreinhöfer, K

    2009-12-01

    Many risk factors for developing osteoarthrosis exist. Osteoarthrosis is the most common cause of chronic disability in middle-aged and older people. On the one hand, physical exercise can lead to arthrosis; on the other hand, physical exercise is commonly used in preventing and treating it. Experimental and clinical studies have shown that increased high-impact running or competitive sports result in a higher risk for osteoarthrosis than moderate low-impact running. In particular, sudden-impact loading and twisting movements of the joints can result in premature osteoarthrosis. Also, sports with a high risk for injuries can lead to secondary osteoarthrosis. Preventive exercises to strengthen the skeletal muscles seem to have a pivotal role. There are different therapeutic approaches to osteoarthrosis, which will be more important in the future. Exercise should be a core treatment for people with osteoarthritis, irrespective of age, comorbidity, pain severity, or disability. Exercise should include local muscle strengthening and general aerobic fitness.

  4. Sports injuries Lesiones deportivas

    Directory of Open Access Journals (Sweden)

    Santiago Patiño Giraldo

    2007-04-01

    Full Text Available Stress generated by sports practice has increased the probability that athletes suffer from acute and chronic injuries. Worldwide, there have been many different investigations concerning the incidence of sport injuries. The different ways in which results have been presented makes it difficult to compare among them. Rates of sports injuries vary between 1.7 and 53 per 1.000 hours of sports practice; 0.8 and 90.9 per 1.000 hours of training; 3.1 and 54.8 per 1.000 hours of competition, and 6.1 and 10.9 per 100 games. The great variability among the incidence rates may be explained by differences among sports, countries, competitive levels, ages and methodology used in the studies. Sports injuries have been defined as those occurring when athletes are practicing sports and that result in tissue alterations or damages, affecting the operation of the corresponding structures. Contact sports such as soccer, rugby, martial arts, basketball, handball and hockey generate greater risk of injuries. The probability of lesions is higher during competition than in training. El estrés generado por la práctica deportiva ha originado una mayor probabilidad de que los atletas presenten lesiones agudas y crónicas. En el ámbito mundial existen diferentes investigaciones acerca de la incidencia de lesiones deportivas. La comparación de sus resultados es difícil por las diferencias en las características de la población y en la forma de reportar los datos, que varía ampliamente entre los estudios (proporciones o tasas de incidencia o tasas por cada 100 ó 1.000 participantes o tasas por horas de juego o por número de partidos jugados. Las tasas varían entre 1,7 y 53 lesiones por 1.000 horas de práctica deportiva, entre 0,8 y 90,9 por 1.000 horas de entrenamiento, entre 3,1 y 54,8 por 1.000 horas de competición y de 6,1 a 10,9 por 100 juegos. La gran variación entre las tasas de incidencia se explica por las diferencias existentes entre los deportes

  5. PRIVATE SECURITY IN SPORT

    Directory of Open Access Journals (Sweden)

    Dragan Vukasović

    2011-09-01

    Full Text Available Given the importance of sport for international integration, affirmation, a sense of belonging and other values of general interest, in order to maintain and open new prospects of development, it is necessary to form the private security system along with state security system, with a view to creating conditions for development sports athletes to achieve better results both in domestic and international competitions. Private security is only one element of an integrated security system which, with its efficient organization with the use of adequate means and measures should provide answers to new challenges, risks and threats. Private security in line with the new understanding of the concept of security has an important role in providing athletes.

  6. ETHICS AND CHANGES IN SPORT

    Directory of Open Access Journals (Sweden)

    Jovo Radoš

    2008-08-01

    Full Text Available Ethics, as a practical philosophy, is found in essential relationships and relations with other relevant practical disciplines (economics, law, politics, sport, etc.. Every human activity is ethically grounded. Therefore, human ethics, which includes sport ethics, is one of the fundamental criteria for establishing moral relations in different are as of sport life. Sport morale stems from a universally accepted ethics legal principles that aim at maintaining sport spirit based on the Olympics codex and humanity principles, among which are: consciousness and honesty, righteousness, cultural-behavior principle, openness, and the like. Changes in sport (organizational, structural, competition, etc. need to be adequately adjusted to universal, and generally accepted, values. Avoiding deontological ethics inevitably leads to increased sports immorality (referees_ fixing match results, spectators_ aggressive behavior, cheating using for bidden doping, etc.. Thus, projecting and introducing innovations in the field of sport, which, after all, are necessary and unavoidable in all areas of life, including sport, will eventually show its positive results only if the aforementioned aspects of sport ethics are taken into consideration.

  7. Onepoto sports changing facilities

    OpenAIRE

    Byrd, Hugh

    2011-01-01

    Located in the centre of a small extinct volcano, the sports changing rooms are the focus for community activities. The construction exploits natural and local products such as the volcanic rock contained in stainless steel gabions. The roof awnings serve several purposes: to increase rainwater harvesting area, to provide shade for spectator seating and for solar panels. Short-listed for the NZIA sustainability award.

  8. The neuropathology of sport

    Science.gov (United States)

    Daneshvar, Daniel H.; Alvarez, Victor E.; Stein, Thor D.

    2014-01-01

    The benefits of regular exercise, physical fitness and sports participation on cardiovascular and brain health are undeniable. Physical activity reduces the risk for cardiovascular disease, type 2 diabetes, hypertension, obesity, and stroke, and produces beneficial effects on cholesterol levels, antioxidant systems, inflammation, and vascular function. Exercise also enhances psychological health, reduces age-related loss of brain volume, improves cognition, reduces the risk of developing dementia, and impedes neurodegeneration. Nonetheless, the play of sports is associated with risks, including a risk for mild TBI (mTBI) and, rarely, catastrophic traumatic injury and death. There is also growing awareness that repetitive mTBIs, such as concussion and subconcussion, can occasionally produce persistent cognitive, behavioral, and psychiatric problems as well as lead to the development of a neurodegeneration, chronic traumatic encephalopathy (CTE). In this review, we summarize the beneficial aspects of sports participation on psychological, emotional, physical and cognitive health, and specifically analyze some of the less common adverse neuropathological outcomes, including concussion, second-impact syndrome, juvenile head trauma syndrome, catastrophic sudden death, and CTE. CTE is a latent neurodegeneration clinically associated with behavioral changes, executive dysfunction and cognitive impairments, and pathologically characterized by frontal and temporal lobe atrophy, neuronal and axonal loss, and abnormal deposits of paired helical filament (PHF)-tau and 43 kDa TAR deoxyribonucleic acid (DNA)-binding protein (TDP-43). CTE often occurs as a sole diagnosis, but may be associated with other neurodegenerative disorders, including motor neuron disease (CTE-MND). Although the incidence and prevalence of CTE are not known, CTE has been reported most frequently in American football players and boxers. Other sports associated with CTE include ice hockey, professional

  9. Diabetes in Sports

    OpenAIRE

    Shugart, Christine; Jackson, Jonathan; Fields, Karl B.

    2010-01-01

    Context: Exercise is recommended for individuals with diabetes mellitus, and several facets of the disease must be considered when managing the diabetic athlete. The purpose of this article is to review diabetes care in the context of sports participation. Evidence Acquisition: Relevant studies were identified through a literature search of MEDLINE and the Cochrane database, as well as manual review of reference lists of identified sources. Results: Diabetics should be evaluated for complicat...

  10. Aquatic sports and safety

    Directory of Open Access Journals (Sweden)

    Володимир Миколайович Зюзь

    2016-11-01

    Full Text Available Aquatic sports or boating, has become a mass sport and recreation. It is as delightful a holiday as one might wish for, gaining strength around the world and especially in Ukraine. More and more people are eager to see the beauty of the underwater world, enjoy exciting sailing races, long journeys along beautiful rivers and unexplored areas, as well as smooth sailing at the height of the season. The article analyzes the modern aquatic (water tourism hazards that can lie in wait for a person in the water during camping trips and various boating competitions. This kind of sports is dangerous in principle, as aqueous medium is always perilous whether water is rough or calm. Accidents are always possible and tourists may find themselves in water, hypothermia, impossibility to breathe, impactions against different objects in the water resulting. Ships, food and equipment may also be damaged or lost, that is the consequences may be extremely negative. This article includes description of boating types, extreme forms of boating, the design features of the swimming facilities used in boating, practical skills and the ability to apply the facilities; characteristics of waves and currents; types of rivers; forms and methods of transportation and rescue of the drowning people; rendering assistance and first aid to the victims; promotion of safety rules on the water during the boating. The main goals and objectives in preparing aquatic tourism professionals whose main duty is safety, training topics, theoretical and practical materials for training the basics of safety that makes it possible to get acquainted with all the requirements have been discussed. The first attempt to develop general educational standards in training professionals in water sports and safety basing on the new priorities and the principles of modern vocational education has been made in the articles

  11. The neuropathology of sport

    OpenAIRE

    McKee, Ann C.; Daneshvar, Daniel H.; Alvarez, Victor E.; Stein, Thor D.

    2013-01-01

    The benefits of regular exercise, physical fitness and sports participation on cardiovascular and brain health are undeniable. Physical activity reduces the risk for cardiovascular disease, type 2 diabetes, hypertension, obesity, and stroke, and produces beneficial effects on cholesterol levels, antioxidant systems, inflammation, and vascular function. Exercise also enhances psychological health, reduces age-related loss of brain volume, improves cognition, reduces the risk of developing deme...

  12. The neuropathology of sport.

    Science.gov (United States)

    McKee, Ann C; Daneshvar, Daniel H; Alvarez, Victor E; Stein, Thor D

    2014-01-01

    The benefits of regular exercise, physical fitness and sports participation on cardiovascular and brain health are undeniable. Physical activity reduces the risk for cardiovascular disease, type 2 diabetes, hypertension, obesity, and stroke, and produces beneficial effects on cholesterol levels, antioxidant systems, inflammation, and vascular function. Exercise also enhances psychological health, reduces age-related loss of brain volume, improves cognition, reduces the risk of developing dementia, and impedes neurodegeneration. Nonetheless, the play of sports is associated with risks, including a risk for mild TBI (mTBI) and, rarely, catastrophic traumatic injury and death. There is also growing awareness that repetitive mTBIs, such as concussion and subconcussion, can occasionally produce persistent cognitive, behavioral, and psychiatric problems as well as lead to the development of a neurodegeneration, chronic traumatic encephalopathy (CTE). In this review, we summarize the beneficial aspects of sports participation on psychological, emotional, physical and cognitive health, and specifically analyze some of the less common adverse neuropathological outcomes, including concussion, second-impact syndrome, juvenile head trauma syndrome, catastrophic sudden death, and CTE. CTE is a latent neurodegeneration clinically associated with behavioral changes, executive dysfunction and cognitive impairments, and pathologically characterized by frontal and temporal lobe atrophy, neuronal and axonal loss, and abnormal deposits of paired helical filament (PHF)-tau and 43 kDa TAR deoxyribonucleic acid (DNA)-binding protein (TDP-43). CTE often occurs as a sole diagnosis, but may be associated with other neurodegenerative disorders, including motor neuron disease (CTE-MND). Although the incidence and prevalence of CTE are not known, CTE has been reported most frequently in American football players and boxers. Other sports associated with CTE include ice hockey, professional

  13. Professional Team Sports Clubs

    DEFF Research Database (Denmark)

    Storm, Rasmus K.

    Professional football in Europe is characterized by persistent deficits, growing debts and additional financial problems among the majority of the top league clubs. Despite these problems, these clubs have an abnormally high survival rate. This paper focuses on this apparent paradox and poses the...... in Europe, this paper argues that professional team sports clubs (PTSCs) are cases of an economic phenomenon normally found in socialist or post-socialist economies....

  14. Conference on sports

    CERN Document Server

    Guenin

    1983-01-01

    Le Docteur Guenin, lui-même un grand sportif, qui exerce entre beaucoup d'autres activités la course à pieds et le ski de fond, est aussi sécrétaire médical du journal "Vie et Santé. Il nous parle de l'exercice du sport, gym aérobic, jogging etc. avec présention de quelques dias et d'un film du Dr.Kupper.

  15. Paid Family Leave, Fathers' Leave-Taking, and Leave-Sharing in Dual-Earner Households.

    Science.gov (United States)

    Bartel, Anne P; Rossin-Slater, Maya; Ruhm, Christopher J; Stearns, Jenna; Waldfogel, Jane

    Using difference-in-difference and difference-in-difference-in-difference designs, we study California's Paid Family Leave (CA-PFL) program, the first source of government-provided paid parental leave available to fathers in the Unites States. Relative to the pre-treatment mean, fathers of infants in California are 46 percent more likely to be on leave when CA-PFL is available. In households where both parents work, we find suggestive evidence that CA-PFL increases both father-only leave-taking (i.e., father on leave while mother is at work) and joint leave-taking (i.e., both parents on leave at the same time). Effects are larger for fathers of first-born children than for fathers of later-born children.

  16. [Doping and sports].

    Science.gov (United States)

    Lippi, G; Guidi, G

    1999-09-01

    Doping is widely known as the use of banned substances and practices by athletes in an attempt to improve sporting performances. The term doping likely derives from "dope", an ancient expression referred to a primitive alcoholic drink that was used as a stimulant in South African ceremonial dances; gradually, the term was extended and finally adopted his current significance. There are at least two essential reasons to support the fight against doping: the potential harmful effects on athletes and the depth corruption of the fair competition. An exhaustive list of banned substances and methods has been drawn by the International Olympic Committee and further accepted by other International Sport Authorities and Federations. This list, regularly updated, is basically divided into doping substances (stimulants, narcotic analgesics, anabolic agents, diuretics, peptide and glycoprotein hormones and analogues), doping methods (blood doping, pharmacological, chemical and physical manipulation) and drugs subjected to certain restrictions (alcohol, marijuana, local anesthetics, corticosteroids and beta-blockers). Although there might be some medical conditions, which could legitimate the need of these substances or methods, there is no place for their use in sport. Thus, an athlete's consume of any of these substances or methods will result in disqualification. Aim of the present review is to provide a synthetic description of both the desirable effects and the potentially harmful consequences of the use of some of the major doping substances and methods.

  17. Sports and disability.

    Science.gov (United States)

    Wilson, Pamela E; Clayton, Gerald H

    2010-03-01

    Participation in recreational and competitive sports at an early age has long been touted as a positive influence on growth and development, and for fostering lifelong healthy lifestyles. The benefits of an active lifestyle include not only fitness, but the promotion of a sense of inclusion and improved self-esteem. These benefits are well documented in all populations, and their importance has been summarized in the recent Healthy People 2010 guidelines. The American Academy of Pediatrics has recently produced a summary statement on the benefits of activity for disabled children. They note that children with disabilities tend to have an overall lower level of fitness and an increased level of obesity. For this population, developing a lifelong desire to be active can be a simple means for limiting illness and much of the morbidity associated with sedentary lifestyles often associated with disability. For disabled youth, participation in disabled sports programs available nationally and internationally can be an effective means to promote such precepts. The goal of this focused review is to improve the learner's knowledge of the positive impact that active lifestyles can have on overall health in the disabled youth population and, as a result, modify their practice by incorporating recreational and competitive sport activities as part of improving overall patient care. Copyright 2010 American Academy of Physical Medicine and Rehabilitation. Published by Elsevier Inc. All rights reserved.

  18. Seville City Hall Chapter Room ceiling decoration

    Directory of Open Access Journals (Sweden)

    Robador, M. D.

    2010-02-01

    Full Text Available The present article describes a chemical and physical study of the colour, chemical composition and mineral phases of the decorative materials in the Seville City Hall Chapter House ceiling. The findings showed that the inner most layer of material, calcite, was covered with white lead, in turn concealed under a layer of gilded bole. The ceiling underwent re-gilding, also over bole, due in all likelihood to wear on the original gold leaf. In the nineteenth century, the entire ceiling with the exception of the inscriptions was whitewashed with calcite and white lead. Silver was employed on King John I’s sword (coffer 27. Gold leaf was used to adorn the royal attributes: crowns, belts, sceptres, swords and rosary beads. The high reliefs were likewise gilded. The pigments identified on the ceiling adornments included azurite, malachite, vermilion and gas black. A lime and ground dolomite mortar was used throughout.

    El objetivo de este trabajo es el estudio de diferentes aspectos, como el color, la composición química y las fases mineralógicas presentes en los diferentes materiales que forman la ornamentación del techo de la Sala Capitular del Ayuntamiento de Sevilla, mediante métodos físicos y químicos. Nuestros resultados muestran que el dorado fue realizado sobre una capa de bol previamente depositada sobre una lámina de blanco de plomo que cubría un estrato de calcita. Posteriormente, y probablemente debido a alteraciones en el dorado original, el techo fue de nuevo dorado usando una técnica similar. En el siglo XIX, casi todo el techo, excepto las zonas con inscripciones, fue blanqueado usando una mezcla de calcita y blanco de plomo. Se empleó plata para cubrir la espada del rey Juan I (casetón 27. Finísimas láminas de oro se usaron para decorar los atributos reales: coronas, cinturones, cetros, espadas y rosarios. En diferentes partes de la decoración fueron detectados pigmentos como azurita, malaquita, bermellón y

  19. Concert halls with strong lateral reflections enhance musical dynamics.

    Science.gov (United States)

    Pätynen, Jukka; Tervo, Sakari; Robinson, Philip W; Lokki, Tapio

    2014-03-25

    One of the most thrilling cultural experiences is to hear live symphony-orchestra music build up from a whispering passage to a monumental fortissimo. The impact of such a crescendo has been thought to depend only on the musicians' skill, but here we show that interactions between the concert-hall acoustics and listeners' hearing also play a major role in musical dynamics. These interactions contribute to the shoebox-type concert hall's established success, but little prior research has been devoted to dynamic expression in this three-part transmission chain as a complete system. More forceful orchestral playing disproportionately excites high frequency harmonics more than those near the note's fundamental. This effect results in not only more sound energy, but also a different tone color. The concert hall transmits this sound, and the room geometry defines from which directions acoustic reflections arrive at the listener. Binaural directional hearing emphasizes high frequencies more when sound arrives from the sides of the head rather than from the median plane. Simultaneously, these same frequencies are emphasized by higher orchestral-playing dynamics. When the room geometry provides reflections from these directions, the perceived dynamic range is enhanced. Current room-acoustic evaluation methods assume linear behavior and thus neglect this effect. The hypothesis presented here is that the auditory excitation by reflections is emphasized with an orchestra forte most in concert halls with strong lateral reflections. The enhanced dynamic range provides an explanation for the success of rectangularly shaped concert-hall geometry.

  20. Hamaoka Atomic Energy Hall, Chubu Electric Power Co., Inc

    International Nuclear Information System (INIS)

    Kawasaki, Yukio

    1979-01-01

    Hamaoka Nuclear Power Station was constructed in the very large site of about 1.6 million m 2 surrounded by sand dunes and pine forests at the southern tip of Shizuoka Prefecture. Hamaoka Atomic Energy Hall was built on the right side of this power station. This hall had been planned as a part of the works commemorating the 20th anniversary of the founding of the company, and was opened in August, 1972. The building is of steel frame type, and has two floors of 1135 m 2 total area. The first floor comprises cinema room, power generation corner and open gallery, and the second floor comprises meeting room, native land corner and observation room. Moreover, there is observation platform on the roof. The purpose of the hall is coexistence and coprosperity with the regional residents, and 13 persons make explanations to visitors having reached to 1.9 million as of the end of June, 1979. It is incorporated in the sightseeing route centering around the Omaezaki lighthouse. The cinema hall accommodates 120 men, and the films concerning nuclear power generation and the construction of a nuclear power plant are shown. In the power generation corner, the explanation on nuclear power generation is made with models and panels. The third hall is being built now as energy corner, and it will be completed in autumn, 1979. (Kako, I.)