Spectroscopic binaries with elliptical orbits

The radial velocity curves of many spectroscopic binaries (SBs) are perturbed by gas streams or proximity effects. For SBs with circular orbits, these perturbations can give rise to spurious orbital eccentricities of high statistical significance. But tests to identify such anomalous orbits can be constructed since perturbed velocity curves are in general no longer Keplerian. The derived tests are applied both to synthetic and to observed velocity curves.Comment: 9pages,3figures,accepted by A&

Irene Wilsing to Mr. Meredith (4 October 1962)

https://egrove.olemiss.edu/mercorr_pro/1947/thumbnail.jp

Geleceğin Öğretim Elemanlarının Öğretimde Planlama, Etkili Öğretim ve Değerlendirmeyle İlgili İhtiyaçları: Bir Örnek Olay Çalışması

The purpose of this study was to assess the needs of research assistants at Middle East Technical University in relation to instructional planning, effective teaching and evaluation, and their awareness level related to self-improvement in an academic context. Data sources were the research assistants who were enrolled on tire program in the Fall term of 2001-2002 academic year, the instructor and her assistant. During the study, qualitative data were gathered and a content analysis technique was adopted to analyze data. Results revealed that prospective instructors have a subject-oriented approach in planning, teaching and evaluation, and they view self-improvement as the improvement of knowledge in the subject. Although program goals seem to be in line with needs, certain practices should be implemented to achieve better outcomes.Bu çalışmanın amacı, Orta Doğu Teknik Üniversitesi’nde araştırma görevlilerinin öğretimde planlama, etkili öğretim, değerlendirme ve akademik ortamda kendilerini geliştirmeye ilişkin duyarlık düzeyini arttırmadaki ihtiyaçlarını değerlendirmektir. Bu çalışmaya 2001-2002 Akademik Yılı Sonbahar Dönemi’nde ilgili dersi alan bütün araştırma görevlileri, dersin öğretim üyesi ve asistanı katılmışlardır. Çalışmada, nitel araştırma yöntemleri kullanılmış ve veriler, temaların kodlanmasını, kategorilere ayrılmasını ve genel boyutların belirlenmesini kapsayan içerik analizi tekniği ile değerlendirilmiştir. Çalışmanın bulguları, geleceğin öğretim elemanlarının ders planı hazırlama, sınıf dinamiği ve değerlendirmeyle ilgili olarak konu ağırlıklı yaklaşıma ve akademik bir ortamda kendilerini geliştirmek için sadece alana yönelik bilgiyi arttırmanın yeterli olduğu inancına sahip olduklarını ortaya koymuştur. Sonuç olarak, söz konusu programın hedefleri her ne kadar ihtiyaçlara yönelik olsa da daha iyi sonuçlar elde etmek için pratikte bazı yeni uygulamalara gereksinim duyulmaktadır

Millisecond Pulsar Velocities

We present improved timing parameters for 13 millisecond pulsars (MSPs) including 9 new proper motion measurements. These new proper motions bring to 23 the number of MSPs with measured transverse velocities. In light of these new results we present and compare the kinematic properties of MSPs with those of ordinary pulsars. The mean transverse velocity of MSPs was found to be 85+/-13 km/s; a value consistent with most models for the origin and evolution of MSPs and approximately a factor of four lower than that of ordinary pulsars. We also find that, in contrast to young ordinary pulsars, the vast majority of which are moving away from the Galactic plane, almost half of the MSPs are moving towards the plane. This near isotropy would be expected of a population that has reached dynamic equilibrium. Accurate measurements of MSP velocities have allowed us to correct their measured spin-down rates for Doppler acceleration effects, and thereby derive their intrinsic magnetic field strengths and characteristic ages. We find that close to half of our sample of MSPs have a characteristic age comparable to or greater than the age of the Galaxy.Comment: 10 pages LaTeX including 2 LaTeX tables and 3 postscript figures; submitted to MNRA

Einfluss der Hirnmorphologie auf die Inzidenz klinisch inapparenter, cerebraler Embolisationen im Rahmen der kathetergestützten Aortenklappenimplantation

Die Aortenklappenstenose ist einer der häufigsten Herzklappenfehler. Als kausal wirkende, kurative Therapie existiert aktuell nur die Implantation einer Aortenklappenprothese. Dafür eignet sich sowohl der operative Aortenklappenersatz als auch die interventionelle, kathetergestützte Aortenklappenimplantation. Während der Prozedur der interventionellen, kathetergestützten Aortenklappenimplantation kommt es zu mechanischen Belastungen von Aorta und Aortenklappe. Dadurch können cerebrale Embolien verursacht werden, welche sich magnetresonanztomographisch als Diffusionsstörungen darstellen. Ziel der vorliegenden Arbeit ist es, die Beziehung zwischen der Hirnmorphologie und dem Auftreten dieser Diffusionsstörungen zu untersuchen. Die Hirnmorphologie wurde anhand von präinterventionellen MRT erhoben und umfasst die Parameter Hyperintensitäten in der weißen Hirnsubstanz, Hirnvolumen, Hirninfarkte, lakunäre Hirninfarkte und Territorialinfarkte. Die darüber hinaus erhobenen Daten zu Patienteneigenschaften und prozeduralen Eigenschaften stehen in keiner Beziehung zu Diffusionsstörungen. Im Bereich der hirnmorphologischen Paramater zeigen die Hyperintensitäten in der weißen Hirnsubstanz eine signifikante Assoziation zu dem Auftreten von Diffusionsstörungen nach kathetergestützter Aortenklappenimplantation. Trotz der Limitation durch das monozentrische Studienprotokoll mit relativ kleinem Stichprobenumfang zeigen die vorliegenden Daten die Beziehung zwischen Hyperintensitäten in der weißen Hirnsubstanz und dem Auftreten von Diffusionsstörungen nach interventioneller, kathetergestützter Aortenklappenimplantation auf. Weitere Studien sind nötig, um die Rolle der Hirnmorphologie, insbesondere der Hyperintensitäten in der weißen Hirnsubstanz, als Risikofaktor für das Auftreten von Diffusionsstörungen nach interventioneller, kathetergestützter Aortenklappenimplantation näher zu untersuchen

O trabalho do/a assistente social na política de saúde: o desvelar do cotidiano do exercício profissional nas instituições

Nesta tese partimos da premissa do trabalho do/a assistente social como atividade inscrita no processo de produção e inserida na divisão social do trabalho, sendo, portanto, o profissional que vivencia em seu cotidiano os rebatimentos das relações institucionais. O estudo adota como objeto central o trabalho dos/as assistentes sociais atuantes na política de saúde na cidade de São Paulo. No cenário pandêmico vivenciado no mundo, o campo de pesquisa foi ampliado de modo a discutir o trabalho do/a assistente social nas instituições de saúde de referência para atendimento à Covid-19, buscando identificar as repercussões da pandemia no exercício profissional, sobretudo os rebatimentos nas atribuições e competências profissionais. Para a apreensão do objeto a pesquisa estabeleceu uma fundamentação teórica acerca da contrarreforma, na proposta econômica no sistema capitalismo, como um caminho para efetivar a lógica de Estado neoliberal, reconhecendo a intencionalidade desse modelo de gestão. Consequentemente, o estudo apresenta uma reflexão sobre o modelo neoliberal na materialidade da Política de Saúde de 1990 a 2020, considerando fundamental a história para a compreensão das relações de força e como caminho para agir no tempo presente. Metodologicamente, a pesquisa foi desenvolvida em duas fases: em um primeiro momento uma pesquisa de campo pautada na metodologia quantitativa direcionada aos/às assistentes sociais atuantes nos hospitais de referência para atendimento à Covid-19; e, posteriormente, uma pesquisa de campo composta por metodologia quantitativa e qualitativa, cuja proposta foi analisar o trabalho do/a assistente social nos espaços sócio-ocupacionais da Política de Saúde (nas instituições de gestão pública e de gestão via Organização Social) e os rebatimentos da contrarreforma do Estado no processo de trabalho. Ambas as fases foram fundamentais para compreender o cotidiano do exercício profissional nas instituições de saúde. Este estudo identifica a importância do fortalecimento na direção da profissão para o enfrentamento das relações de força presentes no cotidiano profissional, que repercutem em todos os trabalhadores (independentemente do espaço sócio-ocupacional em que estão inseridos) diante das implicações particulares dos modelos de gestãoIn this thesis we start from the premise of the social worker’s work as an activity inscribed in the production process and inserted in the social division of work, being, therefore, the professional who experiences the impacts of institutional relations in their daily life. The study adopts as a central object the work of social workers that are active in health policy in São Paulo. In the pandemic scenario experienced around the world, the research field was expanded in order to discuss the work of the social worker in health institutions that are reference in the assistance of Covid-19 patients, seeking to identify the pandemic repercussions on their professional practice, especially the effect in their duties and professional competencies. For the comprehension of the object, the research established a theoretical foundation about the counter-reform, in the capitalism economic proposal, as a way of actualizing the neoliberal state logic, recognizing the intentionality of this management model. Consequently, the study presents a reflection on the neoliberal model in the Health Policy materiality from 1990 to 2020, considering history as an essential element for the understanding of power relations and as a way of acting in the present time. Methodologically, the research was developed in two phases: at first a field research based on quantitative methodology directed to social workers acting in health institutions that are reference in the assistance of Covid-19 patients; and, later, a field research composed of quantitative and qualitative methodology, whose proposal was to analyze the work of social workers in health policy socio-occupational spaces (in public management institutions and institutions that are managed via social organization) and the consequences of the state counter-reform in the work process. Both phases were fundamental to understand the professional practice daily work in health institutions. This study identifies the importance of strengthening the profession in a way that social workers can face power relations that are present in their daily professional life, which have repercussions on all workers (regardless of the socio-occupational space in which they are inserted) in view of the particular implications of management modelsCoordenação de Aperfeiçoamento de Pessoal de Nível Superior – CAPE