HARDENING OF PARTS OF TURBINE ENGINE AXIAL-FLOW COMPRESSOR ROTOR

Investigation on the hardening of parts of the axial-flow compressor rotor

К вопросу определения показателей топливоиспользования парогазовых установок

The paper analyzes general principles of the developed methodology for determination of fuel consumption indices of the plants which are using high-temperature gas and steam power cycles in any their combination for generation of power energy and heat.Проанализированы общие положения разработанной методики определения показателей топливоиспользования установок, использующих для выработки электроэнергии и теплоты высокотемпературный газовый и паросиловой циклы в любом их сочетании

Measurement errors. Analysis and evaluation

The manual for the course of physics is intended to familiarize 1st year students with the basics of the theory of errors, as well as methods for calculating errors that are necessary when performing laboratory works. The manual presents theoretical material on the analysis and methods for calculating the errors of direct and indirect measurements. In addition, methodological materials are given for performing laboratory work, the purpose of which is to consolidate the skill of conducting precision measurements and processing their results

РОЛЬ СОЦІАЛЬНИХ МЕРЕЖ У ДИСТАНЦІЙНІЙ ОСВІТІ ЛІКАРІВ НА ПІСЛЯДИПЛОМНОМУ ЕТАПІ

 The article presents the experience of social networks using as an interactive platform for training of interns and post-graduates of the Family Medicine, Therapy and Cardiology Department of Zaporizhian State Medical University. The description includes the structure and principles of functioning of created pages in “Facebook” and “VKontakte”, the basic forms and methods of teaching, ways of interactivity, the advantages of this option of distance education in the specialty “General practice – Family medicine” and “Internal medicine” above the other methods of post-graduate stage.Стаття висвітлює досвід використання соціальних мереж як інтерактивної платформи для дистанційного навчання лікарів-інтернів та випускників кафедри сімейної медицини, терапії та кардіології факультету післядипломної освіти Запорізького державного медичного університету. Описано структуру та принципи функціонування створених сторінок у мережах “Facebook” і “Вконтакте”, основні форми та засоби навчання, шляхи інтерактивної взаємодії, переваги цього варіанта дистанційної освіти за фахом “Загальна практика – сімейна медицина” і “Внутрішні хвороби” над іншими на післядипломному етапі

Some Methodological Aspects of Selection Serials to Be Included in the Information Environment for Researchers in a Technical or Natural Science (by Example of Optoelectronics and Optical Systems)

A comprehensive citation analysis-based methodology for selecting the world scientific serials to be included in information environment for researchers in a specific natural or technical science is featured. The case study was fulfilled for serials to be included in information environment for researchers in optoelectronics and optical systems (OOS) with the use of Journal Citation Reports (JCR) data. The indices taken for serials evaluation were: total citedness of a serial in the selected journals specialized in OOS; the “discipline impact factor” (Hirst 1978) i.e. the impact factor which numerator is the magnitude of a serial citedness not by all the JCR-indexed journals, but by the ones specialized in OOS, the denominator being the number of papers in a cited serial; the magnitude of total citedness of the journals specialized in OOS in a serial under evaluation; the “discipline susceptibility factor” of a serial (Lazarev and Skalaban 2016; Lazarev et al. 2017), i.e. the number of citations to the mentioned specialized journals made in a serial being evaluated divided by the number of papers in a citing serial. The citation window is one year, the publication window is “5+1” years (i.e. 5 previous years plus the year of citing). With the application of the outlined methodology, the selection of serials believed to be necessary to implement research in OOS has been accomplished, and after application of threshold values, merging and elimination some of the data, the list of 538 serials has been determined. The second pair of indices reflects the susceptibility of the serials being evaluated to the research field represented by cited specialized journals

Health status of older US workers and nonworkers, National Health Interview Survey, 1997-2011.

This is the final version of the article. Available from the publisher via the DOI in this record.INTRODUCTION: Many US workers are increasingly delaying retirement from work, which may be leading to an increase in chronic disease at the workplace. We examined the association of older adults' health status with their employment/occupation and other characteristics. METHODS: National Health Interview Survey data from 1997 through 2011 were pooled for adults aged 65 or older (n = 83,338; mean age, 74.6 y). Multivariable logistic regression modeling was used to estimate the association of socioeconomic factors and health behaviors with 4 health status measures: 1) self-rated health (fair/poor vs good/very good/excellent); 2) multimorbidity (≤1 vs ≥2 chronic conditions); 3) multiple functional limitations (≤1 vs ≥2); and 4) Health and Activities Limitation Index (HALex) (below vs above 20th percentile). Analyses were stratified by sex and age (young-old vs old-old) where interactions with occupation were significant. RESULTS: Employed older adults had better health outcomes than unemployed older adults. Physically demanding occupations had the lowest risk of poor health outcomes, suggesting a stronger healthy worker effect: service workers were at lowest risk of multiple functional limitations (odds ratio [OR], 0.82; 95% confidence interval [CI], 0.71-0.95); and blue-collar workers were at lowest risk of multimorbidity (OR, 0.84; 95% CI, 0.74-0.97) and multiple functional limitation (OR, 0.84; 95% CI, 0.72-0.98). Hispanics were more likely than non-Hispanic whites to report fair/poor health (OR, 1.62; 95% CI, 1.52-1.73) and lowest HALex quintile (OR, 1.21; 95% CI, 1.13-1.30); however, they were less likely to report multimorbidity (OR, 0.78; 95% CI, 0.73-0.83) or multiple functional limitations (OR, 0.82; 95% CI, 0.77-0.88). CONCLUSION: A strong association exists between employment and health status in older adults beyond what can be explained by socioeconomic factors (eg, education, income) or health behaviors (eg, smoking). Disability accommodations in the workplace could encourage employment among older adults with limitations.Funding sources included the National Institute for Occupational Safety and Health (grant no. R01OH03915), the National Institute on Aging (grant no. F30AG040886), and the European Regional Development Fund and European Social Fund to the European Centre for Environment and Human Health (University of Exeter Medical School)

К вопросу ограничения нагрузки отопительных отборов для получения резервной мощности теплофикационных турбоагрегатов

The paper considers problems pertaining to limitation of heating extraction load of power-and-heat supply turbo-generators with the purpose to obtain a reserve power.Graphical dependences for determination of time period within which an indoor temperature is decreased by 1 оС according to relative heat expenditure for heating and a value of outdoor temperature. The paper reveals the possibility to limit a heating load by 20% within some hours time while observing comfortable indoor conditions.Рассматриваются вопросы ограничения нагрузки отопительных отборов теплофикационных турбоагрегатов для получения резервной мощности.Приводятся графические зависимости для определения времени, в течение которого температура внутри помещения снижается на 1 оС в зависимости от относительного расхода теплоты на отопление и температуры наружного воздуха. Показывается возможность ограничения отопительной нагрузки примерно на 20 % в течение нескольких часов при соблюдении комфортных условий в помещении

Вісник Харківського національного університету

The adsorption of reduced forms of molybdo-phosphoric, molybdo-antimono-phosphoric and molybdosilicic heteropoly acids with few anion-exchanger on the base of tetradecylammonium nitrate absorbed onto amorphous silica was investigated. The interaction of heteropoly acids with immobilized quaternary ammonium salts was investigated via UV/VIS and solid-phase spectrophotometric methods. The significant influence of the surface groups on the chromophorous system of adsorbed heteropoly anions was shown. Unexpected strong fixing of HPA on the surface was found to be a result of formation of ion associates between heteropoly acids and immobilized tetradecylammonium nitrate and HPA interaction with active groups of the nonmodified silica surface

Near-Infrared Super Resolution Imaging with Metallic Nanoshell Particle Chain Array

We propose a near-infrared super resolution imaging system without a lens or a mirror but with an array of metallic nanoshell particle chain. The imaging array can plasmonically transfer the near-field components of dipole sources in the incoherent and coherent manners and the super resolution images can be reconstructed in the output plane. By tunning the parameters of the metallic nanoshell particle, the plasmon resonance band of the isolate nanoshell particle red-shifts to the near-infrared region. The near-infrared super resolution images are obtained subsequently. We calculate the field intensity distribution at the different planes of imaging process using the finite element method and find that the array has super resolution imaging capability at near-infrared wavelengths. We also show that the image formation highly depends on the coherence of the dipole sources and the image-array distance.Comment: 15 pages, 6 figure

Опыт освоения ПГУ Оршанской ТЭЦ

Some data on technical characteristics and running-in of the steam and gas unit at the Orsha Thermal Power Station are given in the paper. The paper contains results of the regime optimization and research in respect of higher operational efficiency of steam and gas unit under partial thermal loadings.Приведены краткие данные о технических характеристиках и освоении ПГУ Оршанской ТЭЦ. Даны результаты выполненных исследований по оптимизации режимов и повышению эффективности работы ПГУ при частичных тепловых нагрузках