A cosmic gamma-ray burst on May 14, 1975

A cosmic gamma-ray burst is reported that occurred at 29309.11 s UTC, May 14, 1975. The burst was detected at an atmospheric depth of 4 g/sq cm residual atmosphere with the University of California double scatter gamma-ray telescope launched on a balloon from Palestine, Texas at 1150 UTC, May 13, 1975. The burst was observed both in the single scatter mode by the top liquid scintillator tank in anti-coincidence with the surrounding plastic scintillator and in the double scatter mode from which energy and directional information are obtained. The burst is 24 standard deviations above the background for single scatter events. The total gamma-ray flux in the burst, incident on the atmosphere with photon energy greater than 0.5 MeV, is 0.59 + or - 0.15 photons/sq cm. The initial rise time to 90% of maximum is 0.015 + or - 0.005 s and the duration is 0.11 s. Time structure down to the 5 ms resolution of the telescope is seen. The mean flux over this time period is 5.0 + or - 1.3 photons/sq cm/s and the maximum flux is 8.5 + or - 2.1 photons/sq cm/s

The Social Psychology of Identity and Intergroup Conflict: From Theory to Practice

Cataloged from PDF version of article.This paper reviews the seminal theories of social psychology which have guided scholarship on inter-group conflicts and describes how these theories have been used by conflict resolution practitioners to design Track Two diplomacy initiatives among citizens in conflict zones. The authors hope that such a review will provide scholars of conflict resolution and international politics with a better understanding of how complex social theories are adapted for use in the applied world, and how gaps between theory and practice can be identified and addressed. The paper begins with an overview of three of the main theoretical contributions of social psychology to the problem of inter-group conflict: social identity theory, stereotyping and prejudice, and contact theory. We then review how these theories have been applied by conflict resolution specialists in international and ethnic conflicts as they have sought to moderate intergroup hostilities in conflict zones. The paper concludes with an analysis of the gaps between theory and practice, namely: theory of change gap, transfer strategies gap, and unit of analysis gap. Finally, based on the reviewed social psychology research, the article makes policy recommendations about how these gaps between theory and practice can be narrowed. © 2011 International Studies Association

Three-axis electron-beam test facility

An electron beam test facility, which consists of a precision multidimensional manipulator built into an ultra-high-vacuum bell jar, was designed, fabricated, and operated at Lewis Research Center. The position within the bell jar of a Faraday cup which samples current in the electron beam under test, is controlled by the manipulator. Three orthogonal axes of motion are controlled by stepping motors driven by digital indexers, and the positions are displayed on electronic totalizers. In the transverse directions, the limits of travel are approximately + or - 2.5 cm from the center with a precision of 2.54 micron (0.0001 in.); in the axial direction, approximately 15.0 cm of travel are permitted with an accuracy of 12.7 micron (0.0005 in.). In addition, two manually operated motions are provided, the pitch and yaw of the Faraday cup with respect to the electron beam can be adjusted to within a few degrees. The current is sensed by pulse transformers and the data are processed by a dual channel box car averager with a digital output. The beam tester can be operated manually or it can be programmed for automated operation. In the automated mode, the beam tester is controlled by a microcomputer (installed at the test site) which communicates with a minicomputer at the central computing facility. The data are recorded and later processed by computer to obtain the desired graphical presentations

1/t pressure and fermion behaviour of water in two dimensions

A variety of metal vacuum systems display the celebrated 1/t pressure, namely power-law dependence on time t, with the exponent close to unity, the origin of which has been a long-standing controversy. Here we propose a chemisorption model for water adsorbates, based on the argument for fermion behaviour of water vapour adsorbed on a stainless-steel surface, and obtain analytically the power-law behaviour of pressure, with an exponent of unity. Further, the model predicts that the pressure should depend on the temperature T according to T^(3/2), which is indeed confirmed by our experiment. Our results should help elucidate the unique characteristics of the adsorbed water.Comment: 11 pages, 4 figure

High definition systems in Japan

The successful implementation of a strategy to produce high-definition systems within the Japanese economy will favorably affect the fundamental competitiveness of Japan relative to the rest of the world. The development of an infrastructure necessary to support high-definition products and systems in that country involves major commitments of engineering resources, plants and equipment, educational programs and funding. The results of these efforts appear to affect virtually every aspect of the Japanese industrial complex. The results of assessments of the current progress of Japan toward the development of high-definition products and systems are presented. The assessments are based on the findings of a panel of U.S. experts made up of individuals from U.S. academia and industry, and derived from a study of the Japanese literature combined with visits to the primary relevant industrial laboratories and development agencies in Japan. Specific coverage includes an evaluation of progress in R&D for high-definition television (HDTV) displays that are evolving in Japan; high-definition standards and equipment development; Japanese intentions for the use of HDTV; economic evaluation of Japan's public policy initiatives in support of high-definition systems; management analysis of Japan's strategy of leverage with respect to high-definition products and systems

In the Shadow of the Accretion Disk: Higher Resolution Imaging of the Central Parsec in NGC 4261

The physical conditions in the inner parsec of accretion disks believed to orbit the central black holes in active galactic nuclei can be probed by imaging the absorption (by ionized gas in the disk) of background emission from a radio counterjet. We report high angular resolution VLBI observations of the nearby (about 40 Mpc) radio galaxy NGC 4261 that confirm free-free absorption of radio emission from a counterjet by a geometrically thin, nearly edge-on disk at 1.6, 4.8, and 8.4 GHz. The angular width and depth of the absorption appears to increase with decreasing frequency, as expected. We derive an average electron density of ~10E4 per cc at a disk radius of about 0.2 pc, assuming that the inner disk inclination and opening angles are the same as at larger radii. Pressure balance between the thermal gas and the magnetic field in the disk implies an average field strength of 0.1 milligauss at a radius of 0.2 pc. These are the closest-in free-free absorption measurements to date of the conditions in an extragalactic accretion disk orbiting a black hole with a well-determined mass. If a standard advection-dominated accretion flow exists in the disk center, then the transition between thin and thick disk regions must occur at a radius less than 0.2 pc (4000 Schwarzschild radii).Comment: 20 pages including 12 figures. Accepted for publication in Ap

Strong, Safe, And Secure: Negotiating Early Fathering And Military Service Across The Deployment Cycle

Military fathers of young children often endure repeated separations from their children, and these may disrupt the early parent–child relationship. Postdeployment reunification also poses challenges; disruptions that have occurred must often be repaired in the context of heightened emotions on the part of each family member at a time when fathers are themselves readjusting to the routines and responsibilities of family life. The current study employed qualitative research with the central aim of informing a richer understanding of these experiences. Interviews were conducted with 14 military fathers of young children who had experienced separation from their families during deployment. Narratives were coded using principles of grounded theory, and common parenting themes were extracted. Fathers shared their hopes that their young children would develop qualities of strength, confidence, and self‐sufficiency. They also discussed difficulty in supporting the development of these qualities in their young children due to problems dealing with the negative emotions and difficult behaviors that their children exhibited. Reliance on their parenting partner was commonly cited as an effective strategy as fathers transitioned back to family life. Implications for intervention programs include the provision of parenting and self‐care skills and inclusion of the father's parenting partner in the intervention. RESUMEN Padres militares de niños pequeños a menudo enfrentan repetidas separaciones de sus hijos, las cuales pueden alterar las tempranas relaciones padre‐hijo. La reunificación posterior a la asignación militar también presenta retos; las interrupciones que han ocurrido muy a menudo se arreglan en el contexto de fuertes emociones por parte de cada miembro de la familia en un momento en que los papás están ellos mismos reajustándose a rutinas y responsabilidades de la vida familiar. La investigación cualitativa puede resultar en una mejor comprensión de estas experiencias. Para el presente estudio, se entrevistó a 14 militares, padres de niños pequeños, quienes habían experimentado la separación familiar durante sus asignaciones militares. Se codificaron las narrativas usando principios de teoría básica, y se extrajeron temas de crianza comunes. Los papás compartieron sus esperanzas de que sus pequeños niños desarrollaran su fortaleza, confianza y autosuficiencia. También discutieron la dificultad de apoyar el desarrollo de estas características en sus pequeños niños después de la separación por servicio militar debido a problemas relacionados con emociones negativas y conductas difíciles que sus hijos mostraban. Se citó reiteradamente el depender de la pareja en la crianza como estrategia efectiva en la transición de vuelta a la vida familiar. Las implicaciones para programas de intervención incluyen la incorporación de la pareja de quien dependen los papás para la crianza como parte de la intervención, así como la provisión de habilidades de crianza y autocuidado. RÉSUMÉ Les pères de jeunes enfants qui servent dans l’armée endurent souvent des séparations répétées d’avec leurs enfants, séparations qui peuvent perturber la relation précoce père‐enfant. La réunification après le déploiement peut également poser certains défis: les perturbations qui se sont passées doivent aussi être réparées dans le contexte d’émotions intensifiées de la part de chaque membre de la famille à un moment où les pères eux‐mêmes se réadaptent aux routines et aux responsabilités de la vie de famille. Des recherches qualitatives peuvent mener à une compréhension plus riche de ces expériences. Cette étude a interviewé 14 pères engagés dans l’armée, pères de jeunes enfants qui avaient tous fait l’expérience de la séparation de leurs familles durant le déploiement. Les récits ont été codés en utilisant les principes de la théorie ancrée et les thèmes de parentage commun ont été extraits. Les pères ont partagé leurs espoirs que leurs jeunes enfants feraient preuve de qualités de force, de confiance et d’auto‐suffisance en grandissant. Ils ont aussi discuté la difficulté qui existe à soutenir le développement de ces qualités chez leurs jeunes enfants après le déploiement à cause de problèmes liés aux émotions et aux comportements difficiles dont faisaient preuve leurs enfants. La dépendance envers le partenaire de parentage s’est trouvé fréquemment citée comme étant une stratégie efficace alors qu’ils transitionnaient dans le retour à la vie familiale. Les implications pour des programmes d’intervention comprennent l’inclusion du partenaire de parentage du père dans l’intervention et dans l’accumulation des précautions de parentage et des capacités à prendre soin de soi. ZUSAMMENFASSUNG Väter von Kleinkindern, die im Militär dienen, erfahren oft wiederholte Trennungen von ihren Kindern, welche die frühe Eltern‐Kind‐Beziehung stören können. Auch die Wiedervereinigung nach einem Einsatz beim Militär stellt eine Herausforderung dar: Brüche, die aufgetreten sind, müssen oft im Zusammenhang mit verstärkten Emotionen auf Seiten jedes Familienmitglieds wiedergutgemacht werden. Dies geschieht zu einer Zeit, in der sich die Väter wieder den Routinen und Aufgaben des Familienlebens anpassen. Qualitative Forschung kann zu einem umfangreicheren Verständnis dieser Erfahrungen beitragen. Die aktuelle Studie befragte 14 Väter von Kleinkindern, die beim Militär waren und Trennung von ihren Familien während eines Einsatzes erlebt hatten. Narrative wurden nach den Prinzipien der „Grounded Theory“ kodiert und allgemeine Themen zur Elternschaft wurden extrahiert. Die Väter teilten ihre Hoffnung mit, dass ihre Kinder Eigenschaften wie Stärke, Selbstvertrauen und Selbstständigkeit entwickeln. Sie diskutierten auch Schwierigkeiten bei der Unterstützung der Entwicklung dieser Eigenschaften bei ihren Kleinkindern nach einem Einsatz, aufgrund von Problemen im Umgang mit negativen Emotionen und schwierigen Verhaltensweisen, die ihre Kinder zeigten. Das Vertrauen in das andere Elternteil wurde allgemein als wirksame Strategie zitiert, wenn sie zurück ins Familienleben übergegangen sind. Implikationen für Interventionsprogramme umfassen die Einbeziehung des anderen Elternteils in die Intervention und die Bereitstellung von Erziehungs‐ und Selbstfürsorge‐Fähigkeiten. ABSTRACT 抄録：幼い子どものいる軍人の父親は、子どもとの別れを繰り返すことにしばしば耐えている。そして、これは、早期の親－子関係を中断するだろう。帰還後の家族の再統合もまた問題をはらんでいる。父親自身が家族生活のルーチンと責任に再適応している時に、家族メンバーそれぞれが高揚した感情というコンテクストの中で、生じていた中断がしばしば修復されなければならない。質的研究によりこれらの経験をより豊かに理解する情報をえることができる。この研究では、配備の間に家族との別れを体験した、14人の幼い子どものいる軍人の父親にインタビューした。談話はグランデット・セオリーの原則を用いてコード化され、共通の育児のテーマが抽出された。父親達は、幼い子どもが、強さ、自信、そして自給自足という素質を発達させるだろうという希望を共有していた。彼らはまた、子ども達が示す否定的な感情や難しい行動を扱う問題のために、帰還後に幼い子どものこれらの素質を発達させるように支援するのが難しいと議論した。養育パートナーへの信頼は、彼らが家族との生活に戻る移行における効果的な戦略として、共通して言及された。介入プログラムに対して持つ意味には、父親の養育パートナーを介入に含めること、そして養育スキルとセルフケアのスキルを提供することが、含まれるPeer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/108646/1/imhj21465.pd

Dynamics and energetics of the South Pacific Convergence Zone during FGGE SOP-1 and South Pacific Convergence Zone and global-scale

Significant accomplishments (papers published, conference presentations, and education degrees) are presented. The focus of the current research is outlined. Plans for the coming year are discussed briefly

Nonlinear Scattering of a Bose-Einstein Condensate on a Rectangular Barrier

We consider the nonlinear scattering and transmission of an atom laser, or Bose-Einstein condensate (BEC) on a finite rectangular potential barrier. The nonlinearity inherent in this problem leads to several new physical features beyond the well-known picture from single-particle quantum mechanics. We find numerical evidence for a denumerably infinite string of bifurcations in the transmission resonances as a function of nonlinearity and chemical potential, when the potential barrier is wide compared to the wavelength of oscillations in the condensate. Near the bifurcations, we observe extended regions of near-perfect resonance, in which the barrier is effectively invisible to the BEC. Unlike in the linear case, it is mainly the barrier width, not the height, that controls the transmission behavior. We show that the potential barrier can be used to create and localize a dark soliton or dark soliton train from a phonon-like standing wave.Comment: 15 pages, 15 figures, new version includes clarification of definition of transmission coefficient in general nonlinear vs. linear cas