Highly efficient room temperature spin injection in a metal-insulator-semiconductor light emitting diode

We demonstrate highly efficient spin injection at low and room temperature in an AlGaAs/GaAs semiconductor heterostructure from a CoFe/AlOx tunnel spin injector. We use a double-step oxide deposition for the fabrication of a pinhole-free AlOx tunnel barrier. The measurements of the circular polarization of the electroluminescence in the Oblique Hanle Effect geometry reveal injected spin polarizations of at least 24% at 80K and 12% at room temperature

Factors related to successful job reintegration of people with a lower limb amputation

Objective: To study demographically, amputation-, and employment-related factors that show a relationship to successful job reintegration of patients after lower limb amputation. Design: Cross-sectional study. Setting: University hospital. Patients: Subjects had an acquired unilateral major amputation of the lower limb at least 2 years before, were aged 18 to 60 years (mean, 46yr), and were living in the Netherlands. All 322 patients were working at the time of amputation and were recruited from orthopedic workshops. Intervention: Questionnaires sent to subjects to self-report (1) demographic and amputation information and (2) job characteristics and readjustment postamputation. Questionnaire sent to rehabilitation specialists to assess physical work load. Main Outcome Measures: Demographically related (age, gender); amputation-related (comorbidity; reason and level; problems with stump, pain, prosthesis use and problems, mobility, rehabilitation); and employment-related (education, physical workload) information about the success of job reintegration. Results: Job reintegration was successful in 79% and unsuccessful in 21% of the amputees. Age at the time of amputation, wearing comfort of the prosthesis, and education level were significant indicators of successful job reintegration. Subjects with physically demanding jobs who changed type of job before and after the amputation more often successfully returned to work than subjects who tried to stay at the same type of job. Conclusions: Older patients with a low education level and problems with the wearing comfort of the prosthesis are a population at risk who require special attention during the rehabilitation process in order to return to work. Lowering the physical workload by changing to another type of work enhances the chance of successful reintegration

Дуга нестабильности в украинской геополитике

Статья посвящена проблеме формирования геополитического вектора современной Украины. В статье показаны негативные, фактически кризисные явления и процессы в государственном строительстве Украины. Украина - рубежная страна между современным Западом и Востоком. Усиливающееся противостояние Запада и России может привести к расколу украинского общества и государства в целом. Устремленность политиков страны в сторону Запада несет восточнославянским народам огромный вред. Происходит подмена решения жизненноважных экономических проблем политическими акциями, направленными на раскол восточнославянских народов. Украина по воле ее руководителей становится организатором антироссийской политики в современных условиях. Попытки продвинуть идеи "оранжевой революции" при поддержке США на Восток не увенчались успехом, но наносят огромный экономический и иной вред государству и всему украинскому народу.Стаття присвячена проблемі формування геополітичного вектора Сучасної України. В статті показані негативні, фактично кризові явища і процеси в державному будівництві України. Україна - країна рубежу між сучасним Заходом і Сходом. Протистояння Заходу і Росії, що посилюється, може привести до розколу українського суспільства і держави в цілому. Спрямованість політиків країни у бік Заходу несе східно-слов'янським народам величезну шкоду. Відбувається підміна рішення життєважливих економічних проблем політичними акціями, направленими на розкол східнослов'янських народів. України по волі її керівників стає організатором антиросійської політики в сучасних умовах. Спроби просунути ідеї "оранжевої революції" при підтримці США на схід не увінчалися успіхом, але наносять величезний економічний і інша шкода державі та всьому українському народу.The article is devoted to the problem of forming of geopolitical vector of Modern Ukraine. The negative, actually crisis phenomena and processes in state building of Ukraine are shown in the article. Ukraine is a border country between modern the West and the East. Increasing opposition of the West and Russia can result in the dissidence of Ukrainian society and state on the whole. The tendency of politicians of country toward the West carries enormous harm to the east Slavonic people. There is substitution of decision economic problems by the political actions directed on the dissidence of eastslavonic people. Ukraine on will of its leaders becomes the organizer of anti-russian policy in modern terms. Attempts to move forward the ideas of "orange revolution" at support of the USA east were not crowned by success, but inflict enormous economic and other harm to the state to all Ukrainian people

Vocational perspectives after spinal cord injury

Objective: To give insight into the vocational situation several years after a traumatic spinal cord injury (SCI) and describe the personal experiences and unmet needs; to give an overview of health and functional status per type of SCI and their relationship with employment status. Design: Descriptive analysis of data from a questionnaire. Setting: Dutch rehabilitation centre with special department for patients with spinal cord injuries. Subjects: Fifty-seven patients with a traumatic SCI, aged 18-60 years, admitted to the rehabilitation centre from 1990 to 1998. Main measures: Questionnaire with items related to vocational outcome, job experiences, health and functional status. Results: Of 49 patients who were working at the moment of SCI 60% currently had a paid job. Vocational outcome was related to a higher educational level. A significant relation between the SCI-specific health and functional status and employment was not found. The respondents who changed to a new employer needed more time to resume work, but seemed more satisfied with the job and lost fewer working hours than those who resumed work with the same employer. In spite of reasonable to good satisfaction with the current work situation, several negative experiences and unmet needs were reported. Conclusions: Despite a high participation in paid work following SCI, the effort of the disabled worker to have and keep a job should not be underestimated

Історичне краєзнавство як складова національної освіти: теоретичний аспект

Аналізується процес утвердження історичного краєзнавства в системі національної освіти. Розглядаються теоретичні питання про предмет, об’єкт і завдання історичного краєзнавства. Акцентується увага на виховній і консолідуючій функції історичного краєзнавства в процесі відродження української нації.Анализируется процесс становления исторического краеведения в системе национального образования. Рассматриваются теоретические вопросы о предмете, объекте и задачах исторического краеведения. Внимание акцентируется на воспитательной и консолидирующей функциях исторического краеведения в процессе возрождения украинской нации.The processes of the formation of the local history studies in the system of the national education had been analyzed. The theoretical aspects of the objects and tasks of the local history studies had been shown. The educational and consolidation functions of the local history studies in the Ukrainian national resurrection process had been pointed

Microglia morphotyping in the adult mouse CNS using hierarchical clustering on principal components reveals regional heterogeneity but no sexual dimorphism

Microglia are the resident macrophages of the central nervous system (CNS) and play a pivotal role in immune surveillance and CNS homeostasis. Morphological transitions in microglia are indicative for local changes in the CNS microenvironment and serve as a proxy for the detection of alterations in the CNS, both in health and disease. Current strategies to ‘measure’ microglia combine advanced morphometrics with clustering approaches to identify and categorize microglia morphologies. However, these studies are labor intensive and clustering approaches are often subject to relevant feature selection bias. Here, we provide a morphometrics pipeline with user-friendly computational tools for image segmentation, automated feature extraction and morphological categorization of microglia by means of hierarchical clustering on principal components (HCPC) without the need for feature inclusion criteria. With this pipeline we provide new and detailed insights in the distribution of microglia morphotypes across sixteen CNS regions along the rostro-caudal axis of the adult C57BL/6J mouse CNS. Although regional variations in microglia morphologies were evident, we found no evidence for male–female dimorphism at any CNS region investigated, indicating that - by and large - microglia in adult male and female mice are morphometrically indistinguishable. Taken together, our newly developed pipeline provides valuable tools for objective and unbiased identification and categorization of microglia morphotypes and can be applied to any CNS (disease) model.</p

Музичні жанри: класифікаційні проблеми

Music genres – one of the main terms of the theoretical music studies and music practice, which reflect àesthetic and regulative constants of the music art. The music genres belong to the most important communicative-semantic basics of the artistic systems. This article is an attempt to figure out regulative basics for the development of the music genre theory

Seeing the Forrest through the trees:Oculomotor metrics are linked to heart rate

Fluctuations in a person’s arousal accompany mental states such as drowsiness, mental effort, or motivation, and have a profound effect on task performance. Here, we investigated the link between two central instances affected by arousal levels, heart rate and eye movements. In contrast to heart rate, eye movements can be inferred remotely and unobtrusively, and there is evidence that oculomotor metrics (i.e., fixations and saccades) are indicators for aspects of arousal going hand in hand with changes in mental effort, motivation, or task type. Gaze data and heart rate of 14 participants during film viewing were used in Random Forest models, the results of which show that blink rate and duration, and the movement aspect of oculomotor metrics (i.e., velocities and amplitudes) link to heart rate–more so than the amount or duration of fixations and saccades. We discuss that eye movements are not only linked to heart rate, but they may both be similarly influenced by the common underlying arousal system. These findings provide new pathways for the remote measurement of arousal, and its link to psychophysiological features