794 research outputs found
Efficiency of oil companies in Russia in the context of energy and sustainable development
No full textThe transformation of the energy market and the development of its technologies radically change the industry and uncover new segments for competition. Scientific and technological progress is gradually changing the market structure and replacing petroleum products with other energy sources, creating new consumption sectors. However, the oil and gas industry still plays a major role in the energy and fuel balance of the world (almost 60% of global energy consumption is concentrated in the oil and gas sector). Due to the specifics of the petroleum sector, the companies tend to be large and have a significant direct and indirect influence on the oil industry as a whole. In this article, the authors of the study compared Russian and international companies in the oil and gas sector and identified the distinctive features of each group. To reveal the main factors influencing financial performance, we construct models of the dependence of net profit on various macroeconomic, microeconomic, institutional, and additional factors. The basic panel data model is tested, taking into account fixed and random individual effects. Results show that the profit of each major oil and gas company is affected by revenue, production costs, and tax deductions. The key interest rate set by the Central Bank of Russia is also important for the activities of oil and gas companies. A distinctive factor for petroleum corporations is the negative impact of financial leverage on the profits of domestic companies and the negative impact of investment in the environmental area for foreign companies. According to our forecasts, the total profit of the eight largest oil producers in Russia will decrease by 60% in 2020. Such forecasts are not very encouraging, but due to the current market situation, they are not surprising. © 2020 The Author
Expanding the Applicability of the Competitive Modes Conjecture
No full textThe Competitive Modes Conjecture is a relatively new approach in the field of Dynamical Systems, aiming to understand chaos in strange attractors using Resonance Theory. Up till now, the Conjecture has only been used to study multipolynomial systems because of their simplicity. As such, the study of non-multipolynomial systems is sparse, filled with ambiguity, and lacks mathematical structure. This paper strives to rectify this dilemma, providing the mathematical background needed to rigorously apply the Competitive Modes Conjecture to a certain set of non-multipolynomial systems. Afterwards, we provide an example of this new theory in the non-multipolynomial Wimol-Banlue Attractor, something that up to this point has not been possible as far as the authors know.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Numerical Analysi
Hemodynamic effects of atropine and glycopyrrolate in isoflurane-xylazine-anesthetized dogs
No full textThe purpose of this study was to evaluate and compare the haemodynamic changes caused by the administration of i.v. atropine or glycopyrrolate after i.v. xylazine in isoflurane-anaesthetized dogs. Six healthy Beagles (8.2 to 10.7 kg) were used in 2 trials separated by 7 days. Anaesthesia was induced and maintained with isoflurane in 100% oxygen with controlled ventilation. Once constant end-tidal isoflurane (1.8%) and arterial partial pressure of carbon dioxide (35 to 45 mm Hg) values were reached, baseline data were recorded and xylazine (0.5 mg/kg, i.v.) was given. In trial 1 atropine (0.1 mg/kg, i.v.) was given 5 min after xylazine, and in trial 2 glycopyrrolate (0.025, mg/kg, i.v.), was given 5 min after xylazine. Haemodynamic variables were recorded 3 min after xylazine and 3 min after anticholinergic administration. In trial 2, bilateral vagotomies were performed 10 min after glycopyrrolate, and haemodynamic variables were recorded 3 min later. Heart rate, cardiac index, and stroke index decreased; arterial pressure and systemic vascular resistance increased after xylazine. Heart rate, cardiac index, and rate pressure product increased after anticholinergic administration. Significant differences between atropine and glycopyrrolate were not observed in any of the haemodynamic parameters. Similarly, significant differences between glycopyrrolate and bilateral vagotomy were not observed. The authors conclude that i.v. atropine and glycopyrrolate have equivalent haemodynamic actions during the increased pressure phase after i.v. xylazine in isoflurane-anaesthetized dogs; that i.v. atropine and glycopyrrolate produce comparable increases in heart rate and that both may increase the risk of myocardial hypoxia associated with an increase in rate pressure product; and that vagal blockade produced by high-dose glycopyrrolate (0.025 mg/kg, i.v.) is similar to that produced by bilateral vagotomy..RE: 20 ref.; RN: 51-55-8; 55-48-1; 26675-46-7; 7361-61-7; SC: CA; ZA; VE; 0I; 0V; 6VSource type: Electronic(1) http://upei-resolver.asin-risa.ca?sid=SP:CABI&id=pmid:&id=&issn=0161-3499&isbn=&volume=22&issue=2&spage=163&pages=163-169&date=1993&title=Veterinary%20Surgery&atitle=Hemodynamic%20effects%20of%20atropine%20and%20glycopyrrolate%20in%20isoflurane-xylazine-anesthetized%20dogs.&aulast=Lemke&pid=%3Cauthor%3ELemke%2c%20K%20A%3bTranquilli%2c%20W%20J%3bThurmon%2c%20J%20C%3bBenson%2c%20G%20J%3bOlson%2c%20W%20A%3C%2Fauthor%3E%3CAN%3E19932283834%3C%2FAN%3E%3CDT%3EJournal%20article%3C%2FDT%3
Nomenclatural standards and microsatellite profiles of raspberry cultivars bred at the I.V. Michurin Federal Scientific Center
No full textNomenclatural standards of three raspberry (Rubus idaeus L.) cultivars ‘Kleopatra’ (WIR-98480), ‘Sulamif’’ (WIR-98517) and ‘Shakhrazada’ (WIR-98536) bred at the I.V. Michurin Federal Scientific Center (FSC) were prepared according to the International Code of Nomenclature for Cultivated Plants. The nomenclatural standards of these cultivars have been transferred to N.I. Vavilov Federal Research Center of the All-Russian Institute of Plant Genetic Resources (VIR) for storage in the Herbarium of Cultivated Plants of the World, Their Wild Relatives and Weeds (WIR). Plant material for herbarium specimens was collected in the experimental field of the I.V. Michurin FSC by the cultivars’ author and handed to VIR for genotyping as well as for preservation in the live collection of VIR in compliance with the comprehensive strategy for registering and preserving domestic cultivars of the vegetatively propagated crops in a genebank. Microsatellite profiles of the three cultivars in question were obtained by using six nuclear SSR-markers. The genotyped specimens of the same raspberry cultivars, genotypically identical to the nomenclatural standards, were transferred to the VIR field collection and preservation in controlled conditions in the VIR in vitro collection
Potential of Professional Thinking and Emotional Burnout in the Professions of Socionomic Type
No full textThe analysis of specific features of professional thinking and emotional exhaustion among teachers and doctors in the context of COVID-19 pandemic. The growing demand for practical social psychological support of members of “person to person” professions during the unstable epidemiological situation due to COVID-19 have preconditioned the consideration of emotional exhaustion in the terms of interconnection with professional thinking that is able to contribute new professional and personal meaning to the activity process, thus becoming the cognitive resource that balances the levels and components of emotional exhaustion. The method of content analysis and expert evaluation alongside with mathematical statistical methods, such as correlation method of Charles Spearman and Student’s t-distribution, were used. Participants: 55 people, the members of professions of socionomic type, 25 teachers and 30 doctors, length of time worked – 10-25 years, men – 30%, women – 70%. The methods of studying the specific features of emotional exhaustion (V.V. Boyko; Christina Maslach, S. Jackson, adapted by N.E. Vodopiyanova) and components of professional thinking (the author’s method of self-analysis of the problem situation by I.V. Serafimovich and M.M. Kashapov). It has been demonstrated that suprasituatedness of thinking is negatively correlated with emotional burnout, while situatedness is positively correlated with it. It has been specified that the emotional burnout is more pronounced in doctors. It has been identified that adequacy and sufficiency of analysis of a problem situation are positively associated with the self-esteem of professional success and self-satisfaction, whereas validity is associated with the capability to cope with psychologically destructive circumstances. Under the high efficiency of analysis emotional involvement reduces, and when increasing the depth of analysis emotional burnout enhances. The obtained results about the partial connection of components of professional thinking and signs of emotional exhaustion can be used as the arguments for the author’s position of the ability of usage of thinking as a cognitive resource for solving practical problems.</p
Развитие амилоидного лихена у пациентки с атопическим дерматитом
No full textThe article considers a case of cutaneous amyloidosis that occurred in the setting of atopic dermatitis in a 32-year-old female patient. The patient has suffered from atopic dermatitis since the first months of her life, and homeopathic preparations have been used for treatment. Treatment with conventional medications and physiotherapy at the age of 20 years old resulted in a long-term remission, however, the patient noticed skin thickening in the areas of former rashes. Pathological examination of skin biopsy material and histochemical examination (hematoxylin and eosin, Van Gieson, toluidine blue, Congo red staining, PAS reaction) allowed to diagnose amyloid lichen. Amyloid lichen is a rare and severe complication of atopic dermatitis. Its incidence in patients with atopic dermatitis is approximately 0.8%. Contemporary methods of treating patients with atopic dermatitis accompanied by cutaneous amyloidosis are discussed. Topical products aimed at relieving inflammation and itching are used for initial treatment of amyloid lichen. Surgical treatments, as well as laser and phototherapy, may be used. Systemic medications (antihistamines, acitretin, cyclophosphamide and cyclosporine, upadacitinib, baricitinib) are an effective treatment option. Successful use of biological agents (dupilumab) has been reported.Представлено описание 32-летней пациентки с атопическим дерматитом, на фоне которого развился амилоидоз кожи. Пациентка больна атопическим дерматитом с первых месяцев жизни, для лечения применялись гомеопатические препараты. В результате лечения, проведенного традиционными медикаментозными и физиотерапевтическими средствами в возрасте 20 лет, наступила длительная ремиссия, но пациентка обратила внимание на уплотнение кожи в участках бывших высыпаний. Использование патологоанатомического исследования биопсийного материала кожи и гистохимическое исследование (окраски гематоксилин-эозином, по Ван Гизону, толуидиновым синим, конго красным, ШИК-реакция) позволили установить диагноз амилоиднного лихена. Амилоидный лихен является редким и тяжелым осложнением атопического дерматита. Частота его встречаемости у пациентов с атопическим дерматитом составляет приблизительно 0,8%. Обсуждены современные методы терапии больных атопическим дерматитом, сопровождающимся амилоидозом кожи. Для начального лечения амилоидного лихена используются топические препараты, направленные на купирование воспаления и зуда. Возможно применение хирургических методов лечения, а также лазеро- и фототерапии. Эффективным способом лечения являются системные препараты (антигистаминные препараты, ацитретин, циклофосфамид и циклоспорин, упадацитиниб, барицитиниб). Сообщалось об успешном применении биологических препаратов (дупилумаб)
How sociology of emotions is possible, and how it helps to understand happiness and justice
No full textThe article is a reflection-review of the book by Scott R. Harris An Invitation to the Sociology of Emotions (translated from English by O.A. Simonova; Moscow: HSE; 2020). Certainly, such a type of scientific works does not need a review after publication, but this book requires special attention for sociology of emotions seems to be a marginal area of Russian sociology, at least in the institutional perspective. After a brief description of the origins and manifestations of the ‘affective turn’, the author considers its consequences for social sciences (recognition of the cultural nature of emotions, perception of ‘emotional standards’ in the course of socialization, etc.), and reconstructs the sociological model for the study of emotions as developed by Harris: reliance on symbolic interactionism and the social exchange theory, analysis of the normative aspect of emotions (cultural expectations about how one should feel in different situations, social standards for assessing the acceptability of emotions, etc.) and of the ‘procedural’ side of the emotional life (exchange of emotions, management of emotions, identification of emotions, and ‘emotional labor’). © I.V. Trotsuk, 2021
On the Bolotin's reduced beam model versus various boundary conditions
No full textThis paper is devoted to the construction of asymptotically correct simplified models of nonlinear beam equations for various boundary conditions. V.V. Bolotin mentioned that in some cases (e.g., if compressed load is near the buckling value), the so-called „nonlinear inertia“ must be taken into account. The effect of nonlinear inertia on the oscillations of the clamped-free beam is investigated in many papers. Bolotin used some physical assumption and did not compare the order of nonlinear terms in original equations. Below we propose our method for deriving those, which we will named “Bolotin's equations“. This approach is based on fractional analysis of original boundary value problems.Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Mathematical Physic
Method for Author Attribution Using Word Embeddings
No full textIn this paper we look at a methodology of revealing an unknown document’s author through the use of extracting the author's characteristics from their writing style The method used explores identifying sources of unknown documents, using a model of distributive semantics to form a set of queries to a search engine. The dataset used is the PAN @ CLEF 2019 shared task on Cross-domain Authorship Attribution are in the following languages: English, French, Italian, and Spanish, each of which contains 5 problematic questions, which gives a total of 20 problematic questions. The problem relates to Natural Language Programming where the process is done through the attribution of the user that can be used to identify an author’s work. The method explores identifying sources of unknown document, using a model of distributive semantics to form a set of queries to a search engine. The method used to reveal the unknown authors is done through distributional semantics; this is based on the following hypothesis: the linguistic units that are observed in close contexts have similar semantic meaning, in this area when looking at linguistics this is calculated based on the proximity of linguistic elements in terms of semantic load based on their distribution in large textual boxes.В этой статье рассматривается методология определения автора текста с помощью анализа стиля письма и определения особенностей, характерных для конкретного автора. Данный метод исследует возможности идентификации источников анализируемых документов с использованием модели дистрибутивной семантики для формирования набора запросов для поисковой машины. Используемый набор данных является совместной задачей PAN @ CLEF 2019 в Кросс-доменной Атрибуции Авторских прав на таких языках как английский, французский, итальянский и испанский, каждый из которых имеет 5 задач, что в совокупности ставит 20 задач. Общая задача, объединяющая эти 20 задач, связана с программированием на естественном языке, в рамках которого данный процесс осуществляется через атрибуцию пользователя, которая может быть использована для идентификации работы автора. Приведенный здесь метод исследует выявление источников неизвестного документа, используя модель дистрибутивной семантики для формирования набора запросов к поисковой системе. Метод, используемый для выявления неизвестных авторов, базируется на дистрибутивной семантике и на следующей гипотезе: лингвистические единицы, которые присутствуют в сходных контекстах, имеют сходное семантическое значение. Анализируемые лингвистические единицы рассчитываются, исходя из близости лингвистических элементов с точки зрения семантической нагрузки, основанной на их распределении в больших текстовых отрывках
Nonproportionality of inorganic scintillators
No full textA scintillator is a transparent material that emits a flash of light when it absorbs a ?-ray photon or an energetic particle. Scintillation crystals are widely used as spectroscopic detectors of ionizing radiation in nuclear science, space exploration, medical imaging, homeland security, etc. This thesis is about nonproportional response of inorganic scintillators to ionising radiation of different energies. Nonproportionality is the nonlinear dependence of the total light output of the scintillator on the detected amount of ionization energy, i.e., the emitted number of photons/MeV at 10 keV is not necessarily the same as at 100 keV or at 1000 keV. This dependence is due to a scintillation efficiency that depends on the density of the ionization track. The production of secondary electrons during slowing down of the primary electron inside the scintillator is a probabilistic process and may occur in different ways for the same absorbed energy. The dependence of the absolute light yield on the energy of secondary electrons and the probabilistic mechanism of their creation result in variability of the total number of photons produced inside the scintillator. This process leads to broadening of the photoabsorption peak in the pulse height spectrum measured by a scintillation detector.Radiation, Radionuclides & ReactorsApplied Science
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