Use of a laser for the spectral analysis of semiconductor materials

Conventional applications of lasers for emission spectroscopy involving direct recording of light pulses of an evaporated substance emitted from the sample under the action of the laser light (direct method) were examined. Use of the laser light for conversion of the substance to a vapor and feeding the vapors into the conventional source of emission such as arc, sparks, etc. (the so called 2 stage excitation) were studied for use in the spectral analysis, of semiconductors. The direct method has a high reproducibility (5-7%); the 2 stage excitation method, characterized by the same intensity as obtained with the conventional constant, current arc, has better reproducibility than the direct method (15-20%). Both methods can be used for the analysis of samples without prior preparation. Advantages of these methods are the elimination of impurities picked up during trituration of the samples into powders and shortening of the analytical procedures

Methods of identification parameters and state of ac - electrotechnical complexes mining shovels

Статья посвящена вопросам анализа методов идентификации параметров и состояния электроприводов переменного тока. Сравниваются прямые и косвенные способы измерения массы породы в ковше карьерных экскаваторов. Приводятся методы идентификации момента нагрузки электроприводов с асинхронными двигателями с короткозамкнутым ротором на основе градиентного поиска минимума функции, фильтров с конечной импульсной характеристикой, наблюдателей, оптимальной фильтрации Калмана и искусственных нейронных сетей.Article is devoted to the analysis of identification methods parameters and state of AC electric drives. Compares the direct and indirect measuring methods the mass of rocks in the bucket mining shovels. The methods of identifying the load torque of electric drives with asynchronous motors with squirrel-cage rotor based on gradient search of minimum functions, filters with finite impulse response, observers optimal Kalman filtering and artificial neural networks

Comparison of machine learning methods for analysis of ulcerative colitis proteomic data

Ulcerative colitis is a chronic inflammatory disease of the gastrointestinal system, affecting adults and children. Its cause is unknown, and the knowledge of reliable biomarkers is limited, especially for children. That makes the search for new biomarkers and pushing forth the analysis of the available data particularly challenging. We investigate proteomic data from children patients as a promising source, and tackle the problem implementing the recently developed parenclitic network approach to machine learning algorithms that solve classification task for proteomic data from healthy and diseased. We expect our approach to be applicable to other gastrointestinal diseases

HORMONE AND RADIATION THERAPY IN HIGH- AND VERY HIGH-RISK PATIENTS WITH PROSTATE CANCER

The prevalence of prostate cancer (PC) is steadily growing every year. In the Russian Federation, its peak morbidity is in the age group of 70 years. Some patients refuse surgery or have contraindications because of comorbidity. Teleradiotherapy in combination with or without hormone therapy is an alternative treatment. The paper analyzes the authors’ results of treating high- and very high-risk patients with PC who received hormone and radiation therapy. The study retrospectively included the data of 132 patients who had been allocated to 3 groups according to the duration of adjuvant hormone therapy. The treatment results were assessed over a 5-year follow-up period according the following parameters: a lower decreased prostate-specific antigen (PSA) score, recurrence rate, and 5-year relapse-free survival determined the by PSA level

Communication Skills of University Youth: Employers’ Expectations from Business and Government

В статье анализируются востребованные на рынке труда коммуникативные навыки работников, которые должны быть ориентиром при подготовке будущих специалистов. На основе контент-анализа объявлений о вакансиях выделены круг должностных обязанностей, связанных с дело- вой коммуникацией, и набор коммуникативных компетенций для их выполнения.The article analyzes the communication skills of workers in demand in the labor market, which should be a guideline in the training of future specialists. Based on the content analysis of job advertisements, a range of job responsibilities related to business communication and a set of communication competencies for their implementation have been identified

ФАКТОРЫ ПРОГНОЗА ПРИ РАКЕ ПРЕДСТАТЕЛЬНОЙ ЖЕЛЕЗЫ

Prostate cancer is most common and its heterogenicity is presently apparent. There is a continuous search for the factors allowing the prediction of the poor course and biological difference of tumors. The College of American Pathologists classifies the currently known prognostic factors into 3 categories: 1) the factors whose prognostic importance and successful use have been proven in practice; 2) those that have been widely studied biologically and clinically, but the significance of which needs to be proven in extensive statistical studies; 3) all other factors that have been inadequately studied to demonstrate their prognostic value. Category 1 prognostic factors, such as prostate-specific antigen levels, TNM stage, Gleason grading, and the status of surgical margins, enjoy wide application. Category 2 factors are not used IN clinical practice so extensively. The value of some Category 3 factors (the biomarkers p53, Ki-67, Bcl-2, receptors of androgens) is indubitably and they claim to be widely applied in clinical practice with time. The clinical significance of molecular biological markers calls for further investigation.Рак предстательной железы широко распространен, и в настоящее время очевидной является гетерогенность этого заболевания. Постоянно идут поиски факторов, позволяющих предсказать неблагоприятное течение и биологическое различие опухолей. Коллегия американских патологов (College of American Pathologists) классифицировала известные в настоящее время прогностические факторы на 3 категории: I категория - факторы, прогностическая важность и успешное применение которых в практике доказаны; II - факторы, которые широко изучены биологически и клинически, но значимость которых требуется доказать в широких статистических исследованиях; III - все другие факторы, которые недостаточно изучены, чтобы продемонстрировать их прогностическую ценность. Широкое клиническое применение имеют прогностические факторы I категории, такие как уровень простатспецифического антигена, стадия TNM, градация Глисона и состояние хирургических краев. Факторы II категории не так широко используются в клинической практике. Ценность некоторых факторов III категории (биомаркеры р53, Ki-67, Bcl-2, рецепторы андрогенов) несомненна, и со временем они претендуют на широкое применение в клинической практике. Значение молекулярно-биологических маркеров для клиники требует дальнейшего изучения

НОВЫЕ ТЕНДЕНЦИИ В ПРИМЕНЕНИИ ТАКСОТЕРА (ДОЦЕТАКСЕЛА) ПРИ РАКЕ ПРЕДСТАТЕЛЬНОЙ ЖЕЛЕЗЫ

The papers on studies of the efficacy of Taxotere in prostate cancer (PC) are reviewed. The use of Taxotere is shown to increase survival in patients with metastatic hormone-refractory PC. Taxoterebased neoadjuvant and adjuvant chemotherapies are rather safe and have no sig nificant impact on further surgical and radiation therapies in patients with PC. Проведен обзор работ, посвященных исследованию эффективности Таксотера при раке предстательной железы (РПЖ). Показано, что применение Таксотера способствует увеличению выживаемости больных метастатическим гормонорефрактерным РПЖ. Неоадъювантная и адъювантная химиотерапия на основе Таксотера эффективна, достаточно безопасна и не оказывает значимого влияния на последующее хирургическое и лучевое лечение больных РПЖ.

Ductal prostate cancer

Prostate cancer (PC) preserves its leading position among male tumors. Ductal carcinoma is the second common type of prostate adenocarcinoma. The paper describes different types of ductal carcinoma, which have their morphological pattern. Ductal adenocarcinoma is a relatively rare morphological type of prostate adenocarcinoma traditionally regarded as a more aggressive type of PC, which is represented by the common forms with high Gleason scores (9, 10) and no well-defined treatment regimen. This paper describes 3 cases of ductal PC diagnosed at our center