Precision Measurement of the Spin Structure of the Proton and the Deuteron

Experiment E155 at the Stanford Linear Accelerator Center measured the spin structure functions g1 and g2 of the proton and deuteron using deep inelastic scattering of 50 GeV polarized electrons from dynamically polarized, solid 15NH3 and 6LiD targets. Three independent spectrometers, covering a large kinematic region, 0.014 \u3c xBjorken \u3c 0.9 and 1 \u3c Q2 \u3c 40 (GeV /c)2, detected 200 million events. A fully self-consistent and statistically sound approach to calculating radiative corrections was developed, providing well-defined statistical errors for the E155 data set. Also, a comprehensive fit to the global data set was created which simultaneously describes all existing data on p, d and n ( 3He) targets. The results represent a significant increase in the accuracy of the world data set and, together with the existing data, give improved results for the Bjorken sum rule and the quark spins. The gluon contribution to the nucleon spin is confirmed to be significant

Challenging the Status Quo : car ownership and the Generation Y : an analysis of the German Market

Purpose – This work aims to identify how people of the Generation Y in Germany see the future of mobility with a special focus on car ownership. Furthermore, determinants influencing car ownership are analyzed and implications for the automotive industry are drawn. Design/Methodology – The research relies on primary data collected through an online survey among 20 – 27 years old people in Germany. In order to draw valid conclusions, the data was analyzed carrying out logistic regressions. Findings – Two main factors that influence the likelihood if people own a car were identified. Living in rural areas and being employed are positively associated with car possession, while no significant relationship between environmental attitude and car ownership could be identified. Research limitations – The older part of the Generation Y, those above 27 years, was not covered by the data, therefore no general conclusions on the behavior of the whole generation and international differences can be drawn. Practical implications – This research can help corporations in the automotive and mobility industries to further understand and differentiate their target segment. People of the Generation Y cannot be seen as one homogenous group but need to be identified as fragmented subgroups with entirely different needs and desires. Originality – To the knowledge of the author, this is the first study that combines the topics of Generation Y and sharing economy with the trends in the automotive industry to identify peoples’ perception of mobility.Proposta – O objetivo deste trabalho é identificar como a geração Y alemã vê o futuro da mobilidade com especial atenção na compra de automóveis. Além disso, os fatores que influenciam a compra de carro privado são analisados assim como o impacto que causam na indústria automóvel. Metodologia – A pesquisa é baseada em dados primários que foram recolhidos através de um questionário online. A população alvo são alemães entre os 20-27 anos. Com o objetivo de obter conclusões válidas, a data foi analisada através de regressões logísticas. Resultados – Os dois fatores que influenciam a probabilidade de as pessoas comprarem carro privado foram identificadas. Viver em áreas rurais e ter um emprego estão associadas positivamente à posse de carro, no entanto não existe uma relação significativa entre atitude ambiental e ter carro. Limitações de Pesquisa – A parte mais velha da geração Y, ou seja, acima dos 27 não foi usada para a data, o que significa que não é possível tirar conclusões gerais no comportamento completo da geração Y e pode haver diferenças internacionais. Implicações práticas – Esta pesquisa pode ajudar empresas na indústria automóvel e de mobilidade a perceberem melhor e diferenciar o seu segmento objetivo. A população da geração Y não pode ser vista como um grupo homogéneo, tem que ser identificado como um grupo fragmentado com diferentes necessidades e objetivos. Originalidade – Para conhecimento do autor, esta pesquisa é o primeiro estudo que combina tópicos sobre a geração Y e economia da partilha com as tendências da indústria automóvel para identificar a perceção que as pessoas tem sobre mobilidade

Influence of airfoil geometry on delta wing leading-edge vortices and vortex-induced aerodynamics at supersonic speeds

An assessment of the influence of airfoil geometry on delta wing leading edge vortex flow and vortex induced aerodynamics at supersonic speeds is discussed. A series of delta wing wind tunnel models were tested over a Mach number range from 1.7 to 2.0. The model geometric variables included leading edge sweep and airfoil shape. Surface pressure data, vapor screen, and oil flow photograph data were taken to evaluate the complex structure of the vortices and shocks on the family of wings tested. The data show that airfoil shape has a significant impact on the wing upper surface flow structure and pressure distribution, but has a minimal impact on the integrated upper surface pressure increments

Introduction

The papers and videos presented here are the result of the international conference 'Teaching Classics in the Digital Age' held online on the 15 and 16 June 2020. As digital media provide new possibilities for teaching and outreach in Classics, the conference 'Teaching Classics in the Digital Age' aimed at presenting current approaches to digital teaching and sharing best practices by bringing together different projects and practitioners from all fields of Classics (including Classical Archaeology, Greek and Latin Studies and Ancient History). Furthermore, it aimed at starting a discussion about principles, problems and the future of teaching Classics in the 21st century within and beyond its single fields

Seeking solitude after being ostracized:A replication and beyond

Individuals may respond to ostracism by either behaving prosocially or antisocially. A recent paper provides evidence for a third response: solitude seeking, suggesting that ostracized individuals may ironically engage in self-perpetuating behaviors which exacerbate social isolation. To examine this counterintuitive response to ostracism, we conceptually replicated the original paper in three studies (N = 1,118). Ostracism experiences were associated with preference for solitude across four samples (Study 1), and being ostracized increased participants’ desires for solitude (Studies 2 and 3). Extending beyond the original paper, we demonstrated that only the experience of being ostracized, but not ostracizing others or the feeling of conspicuousness, triggered the desire for solitude. Diverging from the original paper, trait extraversion did not moderate the effect of ostracism on solitude desires. Taken together, the current research provides additional and stronger empirical evidence that solitude seeking is a common response to ostracism

Alter und 'Demenz' im Diskurs der Mitte des 18. Jahrhunderts: Johann August Unzer und sein Umfeld

Johann August Unzer (1727-1799) gilt als einer der drei wichtigsten deutschsprachigen Mediziner der Mitte des 18. Jahrhunderts. Er kann zu den „Halleschen Psychomedizinern“ gerechnet werden, die damals an der Universität Halle das leibseelische Zusammenspiel erforschten. Als früher ‚Medizinjournalist‘ vermittelte er in seiner Wochenschrift „Der Arzt“ einer breiten Leserschaft neueste wissenschaftliche Erkenntnisse. Die Dissertation untersucht die Publikationen Unzers und seines Gelehrtenkreises auf ihren Umgang mit Alter und der Erkrankung, die heute als Demenz konzeptualisiert ist. Die Forschung zu Alter und ‚Demenz‘ im 18. Jahrhundert, zu Unzers medizinischen Konzepten oder zu Alter und ‚Demenz‘ in Unzers Werk ist bisher dünn gesät oder fehlt ganz. Ziel der Arbeit war es, diese drei Aspekte ausführlich darzustellen und schließlich nach Parallelen zwischen dem Umgang des 18. und des 21. Jahrhunderts mit Alter und Demenz zu fragen. Auf eine statistische Auswertung der Texte wurde verzichtet. Textstellen, in denen Unzer das Alter, seine Krankheiten, seine Charakterzüge und seinen moralischen Status diskutiert, wurden in eine chronologische Abfolge gebracht und in thematisch getrennten Kapiteln vor die sozialen, gesellschaftlichen, wissenschaftlichen und politischen Hintergründe ihrer Entstehungszeit gestellt. Im Sinne der Historisch-kritischen Methode wurden sie möglichst ohne ethische Wertung aus ihrer historischen Perspektive diskutiert. Entsprechungen für das gegenwärtige Konzept der Demenz wurden anhand minimaler allgemein bekannter Rahmenbedingungen wie Gedächtnisstörungen oder deviantes Verhalten alter Menschen ermittelt. Bei der Gegenüberstellung des 18. Jahrhunderts und der Gegenwart ergab sich ein zwiespältiges Bild. Fortschritten in der Medizintechnik, gesellschaftlichen Umwälzungen und ethischen Umwertungen stehen Umgangsformen gegenüber, die sich – beispielsweise angesichts hohen Zeit- und Kostendrucks in Pflegekontexten – über die Jahrhunderte kaum verändert haben. Unzers Gedächtniskonzepte sind zwar aus heutiger Sicht realitätsfern, in sich jedoch schlüssig. Sein ganzheitlicher Ansatz kann für das 21. Jahrhundert schließlich als Vorbild dienen

Mjerenje električnog faktora oblika neutrona Gn E dvojno-polariziranim kvazielestičnim raspršenjem u JLabu

We determined the electric form factor of the neutron Gn E via the reaction ~d(~e, e ′n)p using a longitudinally polarized electron beam and a frozen, polarized 15ND3 target at Jefferson Lab. The knocked out neutrons were detected in a segmented plastic scintillator in coincidence with the quasi-elastically scattered electrons which were tracked in Hall C’s High Momentum Spectrometer. To extract Gn E , we compared the experimental beam–target asymmetry with theoretical calculations based on different Gn E models. We report the results of the fall 2001 run at Q2 = 0.5 and 1.0 (GeV/c) 2 .Odredili smo električni faktor oblika neutrona Gn E reakcijom ~d(~e, e ′n)p primjenom uzdužno polariziranog elektronskog snopa i smrznute polarizirane mete 15ND3 u JLabu. Izbačene neutrone opažali smo u hodoskopu od plastičnih scintilatora, sudesno s kvazi-elastično raspćenim elektronima koji su mjereni u spektrometru za velike impulse u Hali C. Da bismo odredili Gn E , usporedili smo mjerenu asimetriju snop-meta s teorijskim računima zasnovamin na više modela Gn E . Izvješćujemo o ishodima od jeseni 2001. na Q2 = 0.5 i 1.0 (GeV/c) 2

Konstruktionen von (Nicht-)Behinderung

Ziel des Beitrages ist es, den Blick sowohl auf die Konstruktionsprozesse von Dis/Ability bzw. Nicht/Behinderung als auch auf das – diesen Praktiken der Unterscheidung – zu Grunde liegende komplexe und interdependente Wechselverhältnis zwischen Behinderung und Nichtbehinderung zu richten. Um dieses höchst selten kritisch hinterfragte Wechselverhältnis sichtbar(er) zu machen, wird in den Disability Studies seit einigen Jahren die Schreibweise mit dem Schrägstrich genutzt. Damit wird dem Tatbestand Rechnung getragen, dass Nichtbehinderung als fraglos gegeben und im vom medizinischen Blick dominierten Alltagswissen als Normalfall gilt. Konkret gesprochen, wird im Beitrag also aufgezeigt, wie die Kategorie Dis/Ability bzw. Nicht/Behinderung in Bildungsprozessen konstruiert wird. (DIPF/Orig.

Mjerenje električnog faktora oblika neutrona Gn E dvojno-polariziranim kvazielestičnim raspršenjem u JLabu

We determined the electric form factor of the neutron Gn E via the reaction ~d(~e, e ′n)p using a longitudinally polarized electron beam and a frozen, polarized 15ND3 target at Jefferson Lab. The knocked out neutrons were detected in a segmented plastic scintillator in coincidence with the quasi-elastically scattered electrons which were tracked in Hall C’s High Momentum Spectrometer. To extract Gn E , we compared the experimental beam–target asymmetry with theoretical calculations based on different Gn E models. We report the results of the fall 2001 run at Q2 = 0.5 and 1.0 (GeV/c) 2 .Odredili smo električni faktor oblika neutrona Gn E reakcijom ~d(~e, e ′n)p primjenom uzdužno polariziranog elektronskog snopa i smrznute polarizirane mete 15ND3 u JLabu. Izbačene neutrone opažali smo u hodoskopu od plastičnih scintilatora, sudesno s kvazi-elastično raspćenim elektronima koji su mjereni u spektrometru za velike impulse u Hali C. Da bismo odredili Gn E , usporedili smo mjerenu asimetriju snop-meta s teorijskim računima zasnovamin na više modela Gn E . Izvješćujemo o ishodima od jeseni 2001. na Q2 = 0.5 i 1.0 (GeV/c) 2