The Method of Selecting Boiler Houses under Technical Re-Equipment in a Mini-CHP

The development of the energy sector is aimed at improving the energy efficiency of heat and electricity. One way is to use cogeneration technologies. A large number of boiler houses created the preconditions for the creation of a mini-CHPP through their technical re-equipment. The purpose of the work is to develop a methodology for selecting and ranking boiler houses for transformation into a mini-CHPP. To achieve the goal, the following tasks were solved: the ef-fects of the formation of a mini-CHP in the energy district were revealed; a system of criteria has been developed that determines the feasibility of transforming a boiler house; a ranking co-efficient was proposed that reflects the potential for improving efficiency; the methodology was tested. The difference of the work is the complexity of the methodology, which takes into ac-count both the advantages of cogeneration technologies and energy balances, as well as individ-ual features of each boiler house. Multi-criteria selection of boiler houses is based on the pur-pose, fuel used, heat output and functions in heat supply systems. The technical condition, pro-spective balances of production and consumption of electricity in the energy district of a mini-CHPP are taken into account. The significance of the results lies in the fact that the proposed methodology makes it possible to increase the validity of decisions when transforming a boiler house into a mini-CHPP. The use of the selection results will lead to an increase in the economic efficiency of the heat supply system

Gender differences of basketball players aged 12-13 years according to the response to a moving object

Purpose: The study aims at the determining gender differences of basketball players aged 12-13 years in response to an object in motion that determines the predominance of excitation and inhibition processes. Material: The participants of the study are 58 basketball players aged 12-13 years, 35 are male basketball players and 23 are female. Male basketball players had 4-5-year training experience, female had 1,5-2-year experience. All athletes had normal visual acuity and were healthy at the time of the study. Young basketball players were informed about the purpose of the study. The computer program containing visual stimuli, moving with acceleration from different points of the monitor was used for testing. Results: The deviations from the target data as well the pole were taken into consideration. It demonstrated the predominance of excitation and inhibition processes of basketball players of different sexes. The response accuracy to visual stimuli without taking into account the pole during perception with the left eye and the right eye is shown. Conclusions: It was found out that the females’ response accuracy during monocular perception is more closely related to the response accuracy during binocular imaging, whereas the role of the males’ leading eye is increased during perception of objects from a convenient side. This may indicate the peculiar reactions under the conditions of double perception of objects in solving complex spatial problems

Reducing the environmental impact of surgery on a global scale: systematic review and co-prioritization with healthcare workers in 132 countries

Background Healthcare cannot achieve net-zero carbon without addressing operating theatres. The aim of this study was to prioritize feasible interventions to reduce the environmental impact of operating theatres. Methods This study adopted a four-phase Delphi consensus co-prioritization methodology. In phase 1, a systematic review of published interventions and global consultation of perioperative healthcare professionals were used to longlist interventions. In phase 2, iterative thematic analysis consolidated comparable interventions into a shortlist. In phase 3, the shortlist was co-prioritized based on patient and clinician views on acceptability, feasibility, and safety. In phase 4, ranked lists of interventions were presented by their relevance to high-income countries and low–middle-income countries. Results In phase 1, 43 interventions were identified, which had low uptake in practice according to 3042 professionals globally. In phase 2, a shortlist of 15 intervention domains was generated. In phase 3, interventions were deemed acceptable for more than 90 per cent of patients except for reducing general anaesthesia (84 per cent) and re-sterilization of ‘single-use’ consumables (86 per cent). In phase 4, the top three shortlisted interventions for high-income countries were: introducing recycling; reducing use of anaesthetic gases; and appropriate clinical waste processing. In phase 4, the top three shortlisted interventions for low–middle-income countries were: introducing reusable surgical devices; reducing use of consumables; and reducing the use of general anaesthesia. Conclusion This is a step toward environmentally sustainable operating environments with actionable interventions applicable to both high– and low–middle–income countries

Electronic Learning in Educational Process: Problems and Perspectives

The paper describes the preconditions and specifics of electronic learning resources in Russian universities and focuses on the priorities in the development of electronic education. As it is revealed, there are certain problems with employing electronic resources in mixed forms of learning, i.e. when such resources are only a part of the educational process, not a complete substitute. The paper explores the advantages and shortcomings of electronic learning in full-time instruction basing on the outcomes of a survey for students and teachers carried out in one the Russian universities. These outcomes help to assess the effectiveness of electronic learning and further perspectives of mixed forms of instruction. The paper finally provides some recommendations on how to increase the effectiveness of electronic learning by means of its integration with traditional technologies in educatio

Management of female handball players' activity applying interactive technologies

The efficiency of developed methods for the control of female handball players' readiness to competitive activity was determined. The opportunities of team management regarding the specification of playing role, the formation of the starting line of players and the replacement according to game priorities in attack or defense were considered. The availability of the adequate zone of handball players' mobilizing readiness that allows to have a significant influence on individual effectiveness in the conditions of optimal management and to increase the quality of team game was determined

Properties of playing and tactical thinking of female handball players with different qualification

Basic properties of varieties of tactical thought of handballers are considered. The level of their display is shown for the sportswomen of different qualification. 78 sportswomen took part in research. For determination of parameters of tactical and playing thought the method of «Balltest» is utillized in an attack and defence. Priority of exactness and speed of thought is set depending on the level of sporting trade of handballers. Different influence of speed of thought is well-proven on the rightness of decision of playing situations of different orientation in the handballers of mass digits and high level of display of the indicated properties of thought for the sportswomen of high qualification. It is discovered that a level of display of basic properties of tactical thought is in defence substantially below of other varieties of thought. It is marked that with the increase of trade of players there were possibilities to growth of quantitative and speed parameters of tactical thought

Вплив психофізичного стану гандболісток різної кваліфікації на їх підготовленість

Studied features a selection of handball players of various skill levels through interdependence parameters psychophysical condition. The study involved 243 handball players of various skill levels. Conducted anthropometric measurements, physical fitness testing, to determine the state of psycho-physiological functions, the calculation of the success of competitive activities. Found that for every subsequent stage of preparing young handball players are selected with certain anthropometric parameters. The selection of qualified athletes indicate a significant advantage of psychophysiological indicators. At the middle level of general physical preparedness depending on the length and circumference of the lower limbs in the making of sportsmanship. Middle and high dependence on the success of competitive activity indicators of spatial perception, logical and spatial thinking is installed in a group of skilled athletes. Identifying additional parameters for the selection of the stages of many years of sports training handball.Изучались особенности отбора гандболисток разной квалификации через взаимозависимость параметров психофизического состояния. В исследованиях принимали участие 243 гандболистки разной квалификации. Проводились антропометрические измерения, тестирование физической подготовленности, определение состояния психофизиологических функций, расчет успешности соревновательной деятельности. Выяснено, что на каждый последующий этап подготовки юные гандболистки отбираются с определенными антропометрических параметрами. Отбор же квалифицированных спортсменок указывает на существенное преимущество психофизиологических показателей. Установлена средняя степень зависимости общей физической подготовленности от длины и окружности нижних конечностей в период становления спортивного мастерства. Средняя и высокая степень зависимости успешности соревновательной деятельности от показателей восприятия пространства, логического и пространственного мышления установлена в группе квалифицированных спортсменов. Обозначены дополнительные параметры для отбора на этапах многолетней спортивной подготовки гандболисток.Вивчалися особливості відбору гандболісток різної кваліфікації через взаємозалежність параметрів психофізичного стану. У дослідженнях приймали участь 243 гандболістки різної кваліфікації. Проводилися антропометричні вимірювання, тестування фізичної підготовленості, визначення стану психофізіологічних функцій, розрахунок успішності змагальної діяльності. З’ясовано, що на кожний наступний етап підготовки юні гандболістки відбираються з певними антропометричних параметрами. Відбір же кваліфікованих спортсменок вказує на істотну перевагу психофізіологічних показників. Встановлена середня ступінь залежності загальної фізичної підготовленості від довжини і обхвату нижніх кінцівок у період становлення спортивної майстерності. Середня і висока ступінь залежності успішності змагальної діяльності від показників сприйняття простору, логічного і просторового мислення встановлена в групі кваліфікованих спортсменів. Позначені додаткові параметри для відбору на етапах багаторічної спортивної підготовки гандболісток

Properties of playing and tactical thinking of female handball players with different qualification

Basic properties of varieties of tactical thought of handballers are considered. The level of their display is shown for the sportswomen of different qualification. 78 sportswomen took part in research. For determination of parameters of tactical and playing thought the method of «Balltest» is utillized in an attack and defence. Priority of exactness and speed of thought is set depending on the level of sporting trade of handballers. Different influence of speed of thought is well-proven on the rightness of decision of playing situations of different orientation in the handballers of mass digits and high level of display of the indicated properties of thought for the sportswomen of high qualification. It is discovered that a level of display of basic properties of tactical thought is in defence substantially below of other varieties of thought. It is marked that with the increase of trade of players there were possibilities to growth of quantitative and speed parameters of tactical thought

Palaeoecological and palaeoclimatic conditions on the Karelian Isthmus (northwestern Russia) during the Holocene

© 2020 University of Washington. Published by Cambridge University Press. The Holocene evolution of climate in easternmost Fennoscandia and adjoining regions is poorly known, compared with regions to the west. To address this, a 224-cm-long sediment core from Lake Medvedevskoe, situated on the Central Upland of the Karelian Isthmus, northwestern Russia, was examined to investigate variations in the Holocene climate. Analyses indicate that the dry and cold late Pleistocene climate was replaced by the warmer and more humid early Holocene climate after ca. 10.5 cal ka BP. During the early Holocene, the lake transitioned from an oligotrophic to a mesotrophic state, characterized by a Corynocera ambigua/Microtendipes pedellus-type phase, which has been found in other lakes across Fennoscandia. Taxonomic shifts in the chironomid and cladoceran communities associated with climatic amelioration were identified at ca. 10.6 and 9.17 cal ka BP using breakpoint analysis. Reconstructed July temperatures indicate climatic patterns comparable to those seen in eastern Fennoscandia. The warm period between ca. 9.5 and 5.5 cal ka BP (T July 14.5-15°C) was interrupted by a slight cooling between ca. 8.5 and 8.1 cal ka BP, possibly relating to the 8.2 event, with peak temperature reached at ca. 7.8 cal ka BP. Neoglacial cooling started after ca. 5.5 cal ka BP, the median reconstructed July temperature dropped to 2-3°C cooler than present (mean T July 13.5°C) before recovering in recent time

Recent shift in biological communities: A case study from the Eastern European Russian Arctic (Bol`shezemelskaya Tundra)

Recent Arctic warming has major influences on biological communities, especially in freshwater environments. There is substantial evidence that lake ecosystems in the Canadian Arctic and Fennoscandia are undergoing changes that have been linked to human-induced climate warming during the past 150–100 years. However, only few data linking recent climatic changes with the changes in biological communities are available from the Russian Arctic. We investigated a short sediment core (bottom of the core dates to 1830 CE) from Lake Bolshoy Kharbey, the biggest lake of the Bol`shezemelskaya Tundra, western Russian Arctic, using chironomid, cladocera, diatom and palynological analyses. Variations in biological proxy were linked to regional meteorological data and compared with the available sub-recent palaeoecological and hydrobiological studies from the region. The overall change in species composition was the smallest for terrestrial vegetation (0.485 SD) followed by cladoceran communities (0.966 SD). Chironomid taxonomic turnover was 1.331 SD, and the greatest rate of change was observed in diatom assemblages (1.701 SD). Changes in biological communities demonstrated a correlation with meteorologically recorded climatic parameters (air temperature and precipitation). The strongest taxonomic shifts in biological communities took place in 1880 and 1980. Both dates can be linked with prominent and recent climatic events: 1880 can be related to the end of the Little Ice Age in the region and 1980 is the beginning of the modern accelerating warming