776 research outputs found

    Phase boundary texturing influence on laminated compound durability under local thermal effect

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    Destruction process modeling has been conducted for a laminated material under a local pointed thermal effect. Temperature field dependence on the coating surface texturing parameters has been studied. A mathematical model of the load distribution in the laminated material with wavy coating surface texturing under thermal effect is presented

    Genus <i>Nicotiana</i> L.: a review of traits significant for ornamental crop production

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    Background. The collection of Nicotiana L. species (Solanaceae) maintained at the All-Russian Scientific Research Institute of Tobacco, Makhorka and Tobacco Products (VNIITTI) is a valuable genetic resource used in breeding and genetic research on interspecific hybridization, cytoplasmic male sterility, and as a genebank for resistance to major tobacco diseases. Many species have ornamental features and properties: bright color and unusual morphology of the corolla, aroma, peculiar plant shape and others, and are promising for use in landscaping and garden designing. To identify and evaluate such species the collection was for the first time screened for a set of morphological and ornamental characters.Materials and methods. Thirty-seven accessions of Nicotiana spp. were studied in the greenhouses and at the experimental breeding site of VNIITTI using breeding methods and agricultural practices developed at the Institute and generally accepted in crop production.Results and conclusion. Phenotypic assessment of 37 Nicotiana accessions resulted in identifying for the first time 14 traits of ornamental value and selecting 18 original species and 10 hybrids of N. alata × N. × sanderae environmentally adapted to the local conditions and promising for landscaping and garden designing: with bright flowers, prolonged flowering, and relative resistance to stressful weather conditions. The typicality and stability of their progeny was assessed, and their germplasm was maintained and preserved in vivo

    Antithrombotic therapy for atrial fibrillation and comorbidities — how to choose the optimal solution?

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    The review discusses the problem of anticoagulant therapy for the prevention of stroke and systemic embolism in patients with atrial fibrillation and comorbidities (hypertension, heart defects, including after heart valve surgery, coronary artery disease, diabetes mellitus, chronic kidney disease, gastrointestinal diseases, anemia, cancer), as well as with a high risk of emergency operations and injuries

    ОСОБЕННОСТИ ПОДАЧИ НОВОСТНОГО КОНТЕНТА НА РЕГИОНАЛЬНОМ ТЕЛЕВИДЕНИИ РОССИИ

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    The article investigates the peculiarities of news content on regional television in Russia. In order to identify these aspects, the authors reviewed the news materials of two TV channels: «Moscow 24» of the Moscow region and GTRK «Tver» of the Tver region. The object of the research is news programs on regional television. The subject of the study is the specifics of news on regional television. Special attention is paid to the specifics of news materials and their requirements. Peculiarities of news content presentation in information programs of regional TV channels were revealed.El artículo investiga las peculiaridades del contenido de las noticias en la televisión regional en Rusia. Para identificar estos aspectos, los autores revisaron los materiales de noticias de dos canales de televisión: «Moscú 24» de la región de Moscú y GTRK «Tver» de la región de Tver. El objeto de la investigación son los programas de noticias en la televisión regional. El tema del estudio son los detalles de las noticias en la televisión regional. Se presta especial atención a los detalles de los materiales de noticias y sus requisitos. Se revelaron las peculiaridades de la presentación del contenido de las noticias en los programas de información de los canales de televisión regionales.В статье исследовано особенности подачи новостного контента на региональном телевидении России. С целью выявления данных аспектов авторы рассмотрели новостные материалы двух телеканалов: «Москва 24» Московского региона и ГТРК «Тверь» Тверской области. Объектом исследования являются новостные программы на региональном телевидении. Предмет исследования – специфика новостей на региональном телевидении. Особое внимание уделено специфике новостных материалов и предъявляемым к ним требованиям. Выявлены особенности подачи новостного контента в информационных программах региональных телеканалов

    Excitonic effects on the two-color coherent control of interband transitions in bulk semiconductors

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    Quantum interference between one- and two-photon absorption pathways allows coherent control of interband transitions in unbiased bulk semiconductors; carrier population, carrier spin polarization, photocurrent injection, and spin current injection may all be controlled. We extend the theory of these processes to include the electron-hole interaction. Our focus is on photon energies that excite carriers above the band edge, but close enough to it so that transition amplitudes based on low order expansions in k\mathbf{k} are applicable; both allowed-allowed and allowed-forbidden two-photon transition amplitudes are included. Analytic solutions are obtained using the effective mass theory of Wannier excitons; degenerate bands are accounted for, but envelope-hole coupling is neglected. We find a Coulomb enhancement of two-color coherent control process, and relate it to the Coulomb enhancements of one- and two-photon absorption. In addition, we find a frequency dependent phase shift in the dependence of photocurrent and spin current on the optical phases. The phase shift decreases monotonically from π/2\pi /2 at the band edge to 0 over an energy range governed by the exciton binding energy. It is the difference between the partial wave phase shifts of the electron-hole envelope function reached by one- and two-photon pathways.Comment: 31 pages, 4 figures, to be published in Phys. Rev.

    Concurrent thermochemoradiotherapy for brain high-grade glioma

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    Despite the achievements in the current strategies for treatment, the prognosis in malignant glioma patients remains unsatisfactory. Hyperthermia is currently considered to be the most effective and universal modifier of radiotherapy and chemotherapy. Preliminary treatment outcomes for 28 patients with newly diagnosed (23) and recurrent (5) high-grade gliomas were presented. All the patients received multimodality treatment including surgery, thermoche-moradiotherapy followed by 4 cycles of adjuvant chemotherapy. All the patients endured thermochemoradiotherapy well. A complication, limited skin burn (II stage), was diagnosed in two cases and treated conservatively without treatment interruption. A month after thermochemoradiotherapy the results were as follows: complete regression was achieved in 4 cases, partial regression in 4 cases, stable disease in 14 cases and disease progression in 6 cases (one of them is pseudo-progression). After completing the adjuvant chemotherapy 2 more patients demonstrated complete response and 1 patient had disease progression. Introduction of local hyperthermia in multimodal therapy of malignant glioma does not impair the combined modality treatment tolerability of patients with malignant gliomas. A small number of studied patients and short follow-up time do not allow making reliable conclusions about the impact of local hyperthermia on the treatment outcomes; however, there is a tendency towards the increase in disease-free survival in the patients with newly diagnosed malignant gliomas

    Pulmonary vasculitis: diagnosis and treatment

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    Pulmonary vasculitis is a group of rapidly progressing severe diseases characterized by vascular inflammation, destruction and necrosis of the pulmonary tissue. The pathological process in the lungs varies from diffuse alveolar hemorrhage to inflammation of the parenchyma, pleural effusion, thrombotic and thromboembolic complications. Depending on the size of the affected vessels, vasculites are divided into vasculites of large, medium and small vessels. Most frequently the lung is found in the small vessels vasculitis, including ANCA-associated vasculitis [granulomatosis with polyangiitis (GP), eosinophilic granulomatosis with polyangiitis (EGPA) and microscopic polyangiitis (MPA)] and the disease is glomerular basement membrane (goodpasture syndrome). Clinical examination of other systems and organs involved in the pathological process, including the skin and kidneys, as well as the detection of autoantibodies can improve approaches to early diagnosis and treatment of vasculitis. Treatment of life-threatening pulmonary bleeding and irreversible damage to organs, especially the kidneys, requires rapid diagnosis of these conditions. Vasculitis is a rare disease with lesions of many organs, and methods of their treatment, including biological, are rapidly developing, which requires the cooperation of doctors of various specialties and specialized centers to achieve better control of the disease

    The mode of life of inhabitants of Syktyvkar in the period of industrialization (based on the materials of the Komi press of the 1930s)

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    В статье на материале региональной прессы восстанавливаются жилищно-бытовые условия проживания рабочих и специалистов г. Сыктывкара в период форсированной индустриализации.The article is based on the materials of the Komi press. Using these facts, the author of the article reconstructs the living conditions of workers and specialists of Syktyvkar in the period of forced industrialization

    Lithologic-facies and paleogeographic features of Mid-Upper Jurassic oil-gas bearing sediments in Nurolsk depression (Western Siberia)

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    Bathonian-Callovian-Oxfordian sedimentation environment reconstruction in SE Nurolsk depression, Western Siberia has been described. Paleogeographic and litho-geochemical features of sediments, numerous plant remains and ichnofossils indicated the fact that this territory during the Naunaksk suite formation was the transition in-situ sedimentogenesis. Based on the integrated research data, the potential litho-facies were identified in the Mid-Upper sediments within Nurolsk depression, Western Siberia
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