Reflection of electrons from a domain wall in magnetic nanojunctions

Electronic transport through thin and laterally constrained domain walls in ferromagnetic nanojunctions is analyzed theoretically. The description is formulated in the basis of scattering states. The resistance of the domain wall is calculated in the regime of strong electron reflection from the wall. It is shown that the corresponding magnetoresistance can be large, which is in a qualitative agreement with recent experimental observations. We also calculate the spin current flowing through the wall and the spin polarization of electron gas due to reflections from the domain wall.Comment: 7 pages, 4 figure

Study of multicharged heavy ion generation from CO2 laser-produced plasma

The results of lead ion generation with charge state from Pb10+ to Pb35+ from laser-heated plasma are presented. CO2 lasers producing 10.6-μm wavelength radiation at power densities in the range 4.1011-6.1014 W/cm2 in TBKI and CERN were used. Results of detailed numerical simulations presented in the paper are in good agreement with the experimental data. Work done in collaboration with CERN, ITEP, and TBKI was aimed at the specification of requirements for a laser system that will be able to drive an ion source for the hadron collider (LHC) at CER

Issues of strategic approach in management accounting

Мanagement accounting focuses on the internal activities of enterprises, the outside business environment in which he operates remains largely unnoticed.Therefore, there is a great need for the concept of management accounting, iestrategic management accounting, which focuses on the external environment. The research justified the need for the introduction of strategic management accounting. Developed a description and conceptual framework for the introduction of strategic management accounting in the field of strategic information based on the analysis of economic literature

ЗАСТОСУВАННЯ ТЕОРІЇ КАТАСТРОФ ДЛЯ МОДЕЛЮВАННЯ ФІНАНСОВОЇ СТІЙКОСТІ БАНКІВСЬКОЇ СИСТЕМИ

The article describes the theoretical aspects of the theory of catastrophes, defines the subject and the essential features of disasters. It argues the feasibility of the main instruments of catastrophe theory to modeling the financial stability of the banking system and emphasizes the importance of catastrophe theory tools for study of the state and dynamics of the banking system. It also researches problematic aspects of implementation methods and bifurcation theory of catastrophes that are used for study and prediction of the systems stability (banking system) at gradual changes of its control parameters.Описаны теоретические аспекты теории катастроф, определены предмет, существенные признаки катастроф. Охарактеризованы основные причины применения теории катастроф к моделированию финансовой устойчивости банковской системы. Подчеркнута важность использования инструментария теории катастроф для исследования состояния и динамики развития банковской системы. Исследованы проблемные аспекты внедрения методов теории катастроф и бифуркаций, которые применяются для изучения и прогнозирования неустойчивости систем (банковской системы) при плавном изменении ее управляющих параметров.Описано теоретичні аспекти теорії катастроф, визначено предмет, істотні ознаки катастроф. Охарактеризовано основні причини застосування теорії катастроф до моделювання фінансової стійкості банківської системи. Наголошено на важливості використання інструментарію теорії катастроф для дослідження стану і динаміки розвитку банківської системи. Досліджено проблемні аспекти впровадження методів теорії катастроф і біфуркацій, які застосовують для вивчення і прогнозування нестійкості систем (банківської системи) за плавної зміни її керівних параметрів

THE IMPACT OF FIXED DENTURES ON THE TISSUES OF THE ORAL CAVITY AND THE COURSE OF GASTROINTESTINAL DISEASES

The article presents the results of scientific research on the negative impact of fixed denture structures on the tissues of the oral cavity and gastrointestinal tract in patients with chronic gastritis. The relevance of the work lies in the fact that orthopedic treatment not only eliminates aesthetic defects, restores the impaired function of the dentoalveolar system, but also has a significant preventive value for the prevention of gastrointestinal diseases. The aim of our research was to study the effect of fixed dentures made of different structural materials on the tissues of the oral cavity and gastrointestinal tract in chronic gastritis. Objects and methods of the study. We examined patients of the gastroenterological department who were inpatients with chronic gastritis and used fixed dentures. The examination took into account complaints of burning sensation, itching, redness of the gingival mucosa, gingival swelling, increased salivation or dryness in the oral cavity, heightened perception of acidity and the presence of microcurrents in the oral cavity; type of denture and visually determined the material from which it is made; compliance of the denture with clinical and technological requirements, the period of its use, diagnosis of the underlying disease for which the patient is undergoing inpatient treatment. Study results and conclusions. According to the results of the study, it was found that out of 86 patients examined, 44 patients (51.16%) of both groups used soldered bridges, 42 (48.84%) full-cast bridges. Pathological manifestations of the negative effects of soldered dentures in the oral cavity and gastrointestinal tract were detected in 41 of 44 patients, which is 47.7% of the total number of patients examined. Out of 42 patients (48.84%) in both groups, 11 (12.8%) had full-cast bridges. Soldered bridges cause 35% more complications in the oral cavity and digestive system than full-cast dentures. Negative manifestations and exacerbation of somatic pathology when using fixed dentures are observed 3 times more often in patients with hyperacid gastritis

Yuz tasvirini Gabor filtri asosida segmentlash

As one of the important parts of face recognition, face image segmentation has become a major focus of human feature recognition. In this paper, the AdaBoost algorithm and Gabor texture analysis algorithm are used to segment an image containing multiple faces, which effectively reduces the false detection rate in face image segmentation. In face image segmentation, the image containing face data is first analyzed by texture using the Gabor algorithm, and different thresholds are set for different skin-like areas, thereby removing skin-like areas in the background image. Then, the face areas are detected using the AdaBoost algorithm, and the detected face areas are segmented. Experiments have shown that the proposed method can quickly and accurately segment faces in the image, and effectively reduce the loss and false detection rates.Yuzni tanib olish muhim qismlaridan biri sifatida yuz tasvirini segmentatsiyalash inson belgilarini aniqlashning asosiy yo‘nalishiga aylangan. Ushbu maqolada AdaBoost algoritmi va Gabor tekstura tahlili algoritmidan foydalanilib, bir nechta yuzlarni o‘z ichiga olgan tasvir segmentatsiyalanadi, bu esa yuz tasvirini segmentatsiyalashdagi noto‘g‘ri aniqlash darajasini samarali kamaytirilgan, yuz tasvirini segmentatsiyalashda, yuz ma’lumotlarini o‘z ichiga olgan tasvir avval Gabor algoritmi orqali tekstura bo‘yicha tahlil qilinadi va turli teriga o‘xshash sohalarni turli bo‘sag‘alari o‘rnatiladi, bu orqali tasvirni fon ma’lumotlaridagi teriga o‘xshash sohalar olib tashlanadi. So‘ngra AdaBoost algoritmi yordamida yuz sohalari aniqlanadi va aniqlangan yuz sohalari segmentatsiyalanadi. Tajribalar taklif etilgan usulni tasvirdagi yuzlarni tez va aniq segmentatsiyalay olishi hamda yo‘qotish va noto‘g‘ri aniqlash darajasini samarali kamaytirishini ko‘rsatdi