bluuebunny/crossref_metadata_2025 huggingface dataset:
DIFFERENT MUSCULOSKELETAL PAINS AND SOCIOCULTURAL FEATURES: THE CASE OF PRIVATE NOBEL PHYSICAL THERAPY AND REHABILITATION MEDICAL CENTER
Authors: KAŞ ÖZDEMİR Atiye , ŞİMŞEK Şule , OYMAK SOYSAL Ayşe Nur , ERDAL Recep
Published: June 2021

Aim: It was conducted to evaluate the effect of some sociodemographic and cultural characteristics on pain perception and pain intensity in different musculoskeletal pains and to determine some characteristics related to pain. Method: By recording the demographic information and sociocultural characteristics of all participants; Scandinavian Musculoskeletal Questionnaire and McGill Pain Scale Short Form were used to assess pain perception and pain intensity. Results: 544 patients, 372 women and 172 men, with subacute and chronic musculoskeletal pain were included in this study. The average age of the participants was 40.74±14.53 years. When the effect of sociocultural factors on pain intensity and pain perception (sensory and perceptual dimensions) is examined; it was determined that as the education level increased, the severity of pain (p = 0.002) and pain perception decreased (p = 0.0001), and the pain intensity of the participants living in the village was higher (p = 0.014). While the severity of pain and pain perception were higher in female individuals, it was determined that they also increased with age. When the relationship between pain intensity and pain perception of the participants is examined; positive high relationship (r = 0.630, p = 0.0001) was found between the intensity of pain and sensory pain perception, and a moderate relationship (r = 0.597, p = 0.0001) was found between perceptual dimension. A high positive correlation was found between sensory and perceptual pain dimensions (r = 0.658, p = 0.0001) Conclusion: Chronic pain experience and pain perception levels are affected by social and cultural characteristics. Sociocultural characteristics of individuals should also be taken into consideration in pain relief. Studies examining the effects of different sociocultural characteristics such as language, religious belief, family structure, pet feeding or interaction with animals on musculoskeletal pain are also needed.
‘TRANS-’ APPROACH TO ARCHITECTURE AND MUSIC INTERACTION: THE RELATIONSHIP BETWEEN MARCOS NOVAK’S LIQUID ARCHITECTURE AND MUSIC
Authors: ÖZKAN ÜSTÜN Gizem , DİNÇ KALAYCI Pınar
Published: June 2021

Aim: The aim of this research is to identify the Novak’s relationship of ‘liquid architecture and music’ as an approach that diverges from the architecture music relationships that have been built throughout the historical process. Method: In describing the approach, initially, the intellectual and critical foundations and features of liquid architecture were emphasized, and subsequently, its relationship with music was discussed through case studies in comparison to the current relationship between architecture and music. Results: When the current relationships of the architecture and music are evaluated, the attitude apart from the arising sensations and affections doesn’t exist within the relationship of liquid architecture and music. Liquid architecture, which has characteristics such as continuity, timelessness, plurality, poetry and obscurity, acquires the characteristics of the individual varying based on his/her body, senses, perceptions, and emotions as the way of producing architecture. It is claimed that the liquidity approach will influence music and architecture in different ways than is known, and that music will transform into a new form of architecture, while architecture becoming a new form of music. In this context, it extends ‘beyond (trans-)’ the limits of current approaches. Conclusion: The sixth category of methodical approaches in architecture music interaction can be defined as the relationship of liquid architecture and music. The way it relates to music and the way it produces architecture also suggests a direction of development to concrete architecture and virtually warns about renewing its theory and tools.
Tasarım Aktivizmi Bağlamında Konu Odaklı Tasarımcılığın Dijital Platformlarının İncelenmesi
Authors: ODUNCU Semih
Published: June 2021

Çevresel politikaların yetersizliğinden doğan ve günlük sonuçları gittikçe daha görünür hale gelen sosyal, ekonomik ve politik sorunlara çözüm arayışları tasarım alanında daha yüksek sesle tartışılmaya başlanmıştır. Daha yaşanabilir bir dünya ülküsüyle tasarım aktivizmi hareketine dahil olan ve aktivist bir yaklaşım gösteren tasarımcılar benzer sorunların çözümüne katkı sağlayabilmek amacıyla farklı bakış açılarıyla bir araya gelmektedirler. Özellikle dijital platformlarda bir araya gelen tasarımcıların farklı alanlardaki konulara çözüm arayışlarını özetleyen bir başlık olarak Konu Odaklı Tasarım, tasarım literatüründe daha önce kapsamlı şekilde incelenmemiştir. 2020’de tüm dünyayı etkisi altına alan küresel salgından sonra iletişimde dijitalleşmenin çok hızlı şekilde normalleşmesi, çevreci aktivist hareketlerin de dijital platformlardaki varlık sahasını yüksek oranda artırmıştır. Bu çalışmada tasarımda aktivizmin tarihsel gelişimi özetlenmiş ve farklı uzmanlık alanlarındaki aktivist tasarımcıların ortak bir sorunu çözebilmek adına bir araya geldiği dijital platformlar detaylı şekilde incelenmiştir. Ayrıca tasarımda aktivizmin dijital platformlardaki gelişimi ekseninde konu odaklı tasarım kavramı tanımlanmıştır. Konu odaklı tasarımın dijital platformlar aracılığıyla aktivizm konusunda sağladığı olanaklar değerlendirilmiştir.
Protocol for preparing minced Artemia nauplii v1
Authors: Lakshmanan Ranjith , Prabu Dhanasekaran Linga , C Kalidas , A Mathanbabu , Raju Saravanan
Published: June 2021

Protocol for preparing minced Artemia napulii as feed for young medusa of upside-down jellyfish Cassiopea andromeda Laboratory hatched Artemia nauplii (Instar I & II stage) were filtered using a 250-micron sieve and concentrated to volume. The Artemia nauplii concentrate were centrifuging @ 8000 rpm for 3 minutes. The supernatant was removed and Artemia nauplii biomass was macerated using a sterile plastic pestle. Completely minced Artemia biomass was homogenously mixed with 5 mL of distilled water to make the concentration of 900-1100 nauplii/mL. Two drops ( ) of minced Artemia biomass was fed to young medusa.
Historical and Linguocultural Analysis of Pathopsychological Terms with -Mania and -Phobia Term Elements
Authors: Popovych Yaroslava
Published: June 2021

The article is devoted to the analysis of the origin of psychological clinical terminology and the impact on its development of historical, mythological and cultural realities/characters of Ancient Greece and Rome. Concerning that clinical terminology’s development took much time it has obviously made it harder to understand than those terms, that were recently composed. The application and understanding of «phobia» and «mania» in ancient authors’ original texts were analyzed to clarify whether the meaning and usage changed throughout the years. Among those text were works of the physicians Hippocrates and Areteus of Cappadocia, historian Pausanias and even philosophers Plato, Seneca, to see if the attitude to each term of those authors has changed in modern pathopsychic terminology. All the results of this study are summarized and represented in 10 categories, depending on the meaning of their attributive components, the origin of the term is analyzed and the corresponding linguistic and cultural commentary is given to it. Comments are related to mythological reality, which can make meaning of the term not clear to those, who are not aware of that specific myth and the historical and cultural features of Ancient Greece and Rome, which influenced the formation of each individual term. In addition, this article contains rare terms, that have -mania and -phobia component, and a similar first element. However, the language sources (Ancient Greek/ Latin) are different, that certify the development of this group of terms, for Latin is used in clinical terminology more rarely, than Greek.
ENERGY EFFICIENCY ASSESSMENT OF THE HOUSING STOCK IN BELARUSIAN REGIONS
Authors: Kameka Volha , Svetlana Izmailovich , Lisichonak Alena
Published: June 2021

The need to ensure energy efficiency of the Belarusian economy at the present stage is justified. Indicators characterizing the level of fuel energy consumption and the impact of fuel consumption on the environment for the Belarusian regions are calculated. The authors found that Vitebsk region is characterized by high heat capacity Gross regional product. Also, Vitebsk region is characterized by a high volume of pollutant emissions into the air. We are talking about the emissions generated from fuel combustion for the production of heat and electricity. It has been substantiated that the main directions of regional development should be to reduce the consumption of fuel resources and the volume of emissions. The authors analyzed the structure of final consumption of fuel and energy resources by sectors of consumption, which showed that the main consumers of fuel and energy resources in Belarus are industry and housing sector.In this article the highest priority has been given by authors to energy efficiency in housing sector. It is noted that improving the energy efficiency of the housing stock can reduce the energy load on the region. It is proposed to use a system of indicators to assess the level of energy efficiency. The scientific novelty is in the application of a systematic approach to assessing energy efficiency. Previous studies were limited to considering individual energy efficiency indicators, rather than their systems. It is proposed to include the following groups of indicators in the system: technical, financial and economic, environmental. In contrast to the previously proposed groups of indicators, the system developed by the authors includes environmental indicators. The relevance of their study is due to regional characteristics, which is especially important for the Vitebsk region.The proposed system of indicators is able to give a holistic view of the level of energy efficiency of the housing stock. Thus, it becomes possible to identify reserves for the growth of energy efficiency in the housing sector in Belarus.
ECOLOGICAL AND ECONOMICAL SUBSTATIATION OF PRODUCTION OF HYDROGEN
Authors: Kovalenko Nataliia , Hutsol Taras , Labenko Oleksander , Glowacki Szymon , Sorokin Dmytro
Published: June 2021

Hydrogen production from biomass may become one of the leading areas of bioenergy in Ukraine soon.Currently, the main direction of biomass energy production in Ukraine is the production of thermal energy for distributed heat supply of enterprises and private households by burning biomass of wood and agricultural origin. Nowadays in Ukraine, there is a technology for the production of biohydrogen. We calculated the environmental and economic effects of hydrogen production as a source of energy. We have come up with the following conclusion that if there is a demand for the final product, hydrogen production will be attractive from economic standpoint and will not require a green tariff or other support from the government.The market price of biohydrogen will be $ 4-5 per kg and will be comparable to that which the European Union aims to achieve.We assume that hydrogen may be a cleaner source of energy for end users, especially in the transport sector in the future.One of the main issues of Ukraine's possible participation in Europe's hydrogen energy program as a supplier and producer of renewable hydrogen is the possibility of its technically safe and cost-effective transportation to EU countries.As the main hypothesis considered transportation of hydrogen using the gas transmission system of Ukraine as part of a mixture with natural gas. Calculations show that, of course, obtaining energy from hydrogen, even in mass production, will be more expensive than alternative traditional and non-traditional methods. The development of this technology, in any case, is promising in terms of the development of energy independence and environmental development of states. The effect of scale in mass production of hydrogen energy should also work, which will significantly reduce the cost of this technology.
SEASONAL DYNAMICS OF PHYTOPLANKTON AND SOME HYDROCHEMICAL INDICATORS OF THE PEIPSI-PSKOV LAKE
Authors: Drozdenko Tatyana , Fedorov Sergey , Kek Irina
Published: June 2021

The Peipsi-Pskov Lake is the largest freshwater body in Europe, ranking fourth in area and fifth in volume. It is characterized by shallow water and a high level of trophy. The water in the lake is poorly mineralized and has little transparency due to suspended sediments and the development of plankton. Phytoplankton acts as a primary link in trophic chains, quickly reacts to changes in the aquatic environment and serves as a convenient object in monitoring studies.The average concentrations of total nitrogen in the lake during the observation period were in the range of 525-818 µg/dm3. The content of ammonium, nitrate, and nitrite nitrogen in the samples was mostly below the detection limits. The values of total phosphorus varied from 20 µg/dm3 to 54 µg/dm3, and its concentrations were lower than the sensitivity of the method during the flood recession.The maximum values of total nitrogen and phosphorus were recorded in August: in Lake Peipsi - 1.12 mg/dm3 and 0.09 mg/dm3, in Lake Pskov - 1.59 mg/dm3 and 0.14 mg/dm3, respectively. BOD5 values ranged from 1.96 mg/dm3 in autumn to 4.26 mg/dm3 in summer.During the growing season of 2020, 244 species taxa of phytoplankton from 8 phylums were identified in the Peipsi-Pskov Lake: Chlorophyta, Bacillariophyta, Cyanobacteria, Chrysophyta, Euglenophyta, Cryptophyta, Dinophyta and Xanthophyta. Floristic complex was characterized as сhlorophyta-diatom-cyanobacterial.The number of phytoplankton varied between 2.1 and 16.2 million cells/l depending on the season. The average number was 7.6 million cells/l. The biomass values ranged from 0.9 g/m3 to 3.6 g/m3. The average biomass was 2.3 g/m3.According to the ecological and geographical characteristics of the lake, widespread freshwater forms of microalgae predominated, preferring stagnant-flowing, slightly alkaline waters.Saprobiological analysis showed that the waters of the Peipsi-Pskov Lake were classified as moderately polluted, class III of water purity quality.
MECHANICAL PROPERTIES OF WOOD PLASTIC COMPOSITES WITH THE ACTIVATED WOOD FILLER
Authors: Shulga Galia , Neiberte Brigita , Vitolina Sanita , Verovkins Anrijs , Brovkina Julia , Betkers Talrits
Published: June 2021

The aim of the research was a study of the effect of activation of birch sawdust microparticles with a dilute solution of sodium hydroxide at a low temperature on mechanical properties and water sorption of the obtained wood plastic composite (WPC) samples obtained from a by-product of a domestic wood mechanical processing and a recycled polymer municipal waste. It was found that the mechanical (tensile, bending) properties of the WPC samples filled with the activated birch sawdust microparticles were higher than those of the samples filled with the initial sawdust. The sorption and swelling degree of the WPC samples with the activated filler were lower than those for the samples with the initial sawdust. However, the difference in the values of the water sorption and the swelling degree for the samples filled with the activated and initial wood microparticles were relatively low in comparison with the observed essential difference in their mechanical properties. This fact was explained by the enhanced content of carbonyl groups in the activated sawdust microparticles that are able to absorb water.
EVALUATION OF VIBRATION-BASED GLOBAL STRUCTURAL HEALTH MONITORING METHOD FOR MEDIUM-RISE BUILDINGS
Authors: Gaile Liga , Radins Ivars
Published: June 2021

The automated monitoring of a building’s structural health during its exploitation is a way to extend its design life without compromising structural safety.  In turn, it helps increase the rate of building renovation works compared to demolition works, which reduces future construction and demolition waste levels.This research explores the vibration-based global monitoring method application to structurally stiff medium-rise reinforced concrete buildings by analysing predicted building vibration amplitudes and spectrum under regular city traffic excitation. These predictions are based on the results obtained from finite element calculations of building models with variated structural stiffness and inertial mass of the building.Regular traffic-generated ground frequency spectrum differs from the first natural frequencies of medium-rise reinforced concrete buildings, and the vibration energy is low. Nevertheless, it is found that the structural identification of such building dynamic parameters is still possible, particularly natural frequencies. It was found that the ratio between fundamental frequency for the fixed base model of the building and elastic spring foundation model is the decisive parameter for selecting the building part to be monitored. Structural health monitoring vibration-based methods are also a promising technology for medium-rise mass house buildings when tailored according to some damage sensitive feature.
WATER SPRINGS AS A RESOURCE FOR NATURE TOURISM IN LATVIA: A TOURIST PERSPECTIVE
Authors: Bikse Jānis , Gavinolla Mahender Reddy
Published: June 2021

Water springs are considered as one of the important natural resource for tourism due to its socio-economic, cultural, health and religious benefits. Tourists are motivated to visit the water springs due to various reasons like sacredness, health benefits, education and cultural enrichment.  Latvia is blessed with several water springs, which are potential attractions for the sacred water or holy water tourism. There are several studies conducted on various aspects of water springs in general. However, the research in the context of tourism, particularly motivations and interest of tourist is very scant. In this regard, aim of the paper is to know the motivations and potential benefits of the water spring tourism to tourist in Latvia. Initially authors reviewed existing literature to know the state of the spring tourism. Semi structured interviews and online-survey method to obtain visitors responses.  Interviews were held with the visitor, covering various aspects like motivations and benefits of water spring tourism. To the best of the author’s knowledge, very few studies conducted on spring tourism in Latvia, to provide a detailed overview on tourist motivations and potential benefits of visiting water spring tourism. Overall, the study results provide the basis for understanding the most frequently visited water spring resources by the tourists in Latvia. Nature appreciation, natural setting followed by mineral and health benefits are the major reasons to visit the water springs. Further, it allows decision makers to incorporate tourist opinion and their suggestions in the sustainable planning, promotion and management of water springs as tourist destinations in Latvia.
USING OF AIRBORNE LIDAR ALTIMETRY AND SEMI-AUTOMATED GIS TOOLS FOR IDENTIFICATION AND MAPPING OF FLUVIAL TERRACES IN THE AUGŠDAUGAVA SPILLWAY VALLEY
Authors: Soms Juris , Vorsalvs Valdis
Published: June 2021

River terraces are one of the typical and widespread Quaternary fluvial landforms in Latvia. Until recently, distinguishing and mapping of these features have required extensive field surveys. However, the availability of high resolution digital elevation models (DEM) derived from airborne laser altimetry and application of modern geographic information systems (GIS) provides sufficient background to resolve these tasks. In this study, we apply an integrated methodology based on using of remote sensing, i.e. laser scanning or Light Detection and Ranging (LiDAR) data and combining of semi-automated TerEx tools for the detection of fluvial terraces in DEM. The empirical tests performed using the tools in the study area reveal that the application of TerEx gives the reliable results. However, presence of minor landforms which increase the topographical roughness of the surface directly influence the quality of extracted data, thus leading to the necessity of additional manual editing. The obtained data indicate that the terrace sequence in the Augšdaugava spillway valley consists of eight different terrace levels – T1 to T8. Only terraces T1 and T2 are easily recognizable in the study area, whereas the upper terraces do not have explicit edges.
ON ONE SCIENTIFICALLY BASED SOWING MANAGEMENT FOR GETTING PARETO-OPTIMAL CROPS HARVEST
Authors: Guseynov Sharif E. , Aleksejevs Ruslans , Matyukhin Sergey , Aleksejeva Jekaterina , Semenova Galina
Published: June 2021

In the present work, we construct and study a mathematical model for one important agrarian problem of grain production, in which it is necessary to obtain such a guaranteed harvest of crops, the yield of which depends on soil-climatic conditions, so that the gross income from the sale of the grown crop is maximum. The constructed mathematical model is a multi-criteria optimization problem (with five criteria), and it can be attributed to optimal control, in which the controlled parameters are the kind and proportion of crops to be sown. Based on the results obtained, a concrete example is implemented using the application package Mathcad, version 14.0.0.163.
EXPRESSION OF COMMUNICATION SKILLS AND BENEFITS FOR CREATING AN EFFECTIVE MENTORING ENVIRONMENT. COMPARATIVE ANALYSIS OF THE CASE OF LITHUANIA AND LATVIA
Authors: Bartuševičienė Vitalija , Bartkute-Norkuniene Vaida , Jodienė Rasa , Zvaigzne Anda , Kotāne Inta , Mietule Iveta , Murinska Sandra
Published: June 2021

This paper presents a comparative analysis of the survey results on communication competencies in mentoring in Lithuania and Latvia. In mentoring, it is imperative to examine barriers to communication competencies between business consultants (from now on referred to as "mentors") and start-up entrepreneurs or those intending to start a business (from now on referred to as "mentees") and propose solutions on how to enhance and maintain the business mentor network by utilizing communication technologies.
IMPROVING ADAPTIVE LEARNING IN A SMART LEARNING ENVIRONMENT
Authors: Marzano Gilberto , Abuze Anda , Nur Yeliz
Published: June 2021

It has been broadly argued that, in the near future, the demand for skilled labor will increase whilst that for routine activities will decrease. In this regard, the need for making greater investments in education to re-skill workers and support continuous learning has been invoked as an essential requirement for preserving people’s employability.Digital technology is deemed increasingly necessary to sustain the educational endeavor, for the possibilities it offers to make more accessible and low-cost educational interventions. It allows for the creation of personalized learning paths and customized digital learning solutions, for courses to be available to a large attendance of learners, and for teaching-learning activities to be offered at significantly reduced cost.In this article, a learning unit structure designed to improve adaptive learning is proposed, and mechanisms for adaptive learning in a smart learning environment are discussed.The implemented teaching-learning solution is also illustrated. This is a preliminary application based on an approach that combines the teacher experience with learning analytics.
COVID-19 NEWS AND AUDIENCE AGGRESSIVENESS: ANALYSIS OF NEWS CONTENT AND AUDIENCE REACTION DURING THE STATE OF EMERGENCY IN LATVIA (2020–2021)
Authors: Rozukalne Anda , Kleinberga Vineta , Grūzītis Normunds
Published: June 2021

This research focuses on the interrelation between news content on COVID-19 of three largest online news sites in Latvia (delfi.lv, apollo.lv, tvnet.lv) and the audience reaction to the news in the Latvian and Russian channels during the state of emergency. By using a tool for audience behaviour analysis, the Index of the Internet Aggressiveness (IIA), for analysis of audience comments, the study aims to uncover how and whether news about COVID-19 affect the level of audience aggressiveness. The study employs two data collection methods: news content analysis and IIA data analysis, in which ten index peaks are selected in each of the two emergency periods (spring 2020, fall and winter 2020/21). The study data consists of content analysis of 400 news items and analysis of ~80,000 comments, identifying the level of aggressiveness, the number and structure of comment keywords. The results show that the level of public aggressiveness is only partially formed by the attitude towards COVID-19 news: less than half of the most aggressively commented news is devoted to information about COVID-19. An increase in the level of aggressiveness of the audience of online news sites can be observed at the end of 2020 and at the beginning of 2021 when it is higher than over the course of 2020.IIA is an online comment analysis platform, which analyses user-generated comments on news on online news sites according to pre-selected keywords, allowing to grasp the dynamics of commenters’ verbal aggressiveness. In addition, IIA exploits a machine learned classifier to recognize not only potentially aggressive keywords but also to analyse the entire comments. In January 2021, the IIA data set consists of ~24.89 million comments (~611.97 million words) added to ~1.34 million news articles.
ENHANCED PARTICIPANTS' REGISTRATION MODEL ON OPEN PUBLIC EVENTS
Authors: Andersons Aigars , Ritter Siegfried , Prodani Rafail , Bushati Jozef
Published: June 2021

The Digital transformation (DT) has challenged most of the Event Management (EM) services at a time when organizers of open public events still faced a lot of manual operations upon registration of the public event’s participants. This survey demonstrates a model to increase a level of digitalization and use of technology, with increased self-service level for registered participants and digital data transfer. The model is based on outcomes from the series of several case studies, practical tests and research activities in Latvia, Albania, and Germany. The paper examines different ways how organizers are able to innovate their routine activities and encourage the broader public to learn and use various digital technologies: Radio-frequency identification (RFID), Near-field Communication (NFC), Quick Response (QR) codes and Mobile apps with a purpose to link the physical and the digital world in the one coherent model. In this research the major part of event management process modelling had been done by Business process Model and Notation (BPMN2) approach. The approach proposed by authors aims to reduce the costs and workload of organizers associated with participants’ registration in open public events where preliminary registration is still practically impossible or forbidden because of personal data protection issues.
INDICATORS OF FORMALIZED DESCRIPTION QUALITY AND ANALYSIS OF PRODUCTION TECHNOLOGIES
Authors: Andreev Dmitry , Dementiev Alexander , Lyokhin Sergey , Verteshev Sergey , Timofeeva Olga
Published: June 2021

This paper discusses conceptual basis for assessment and analysis of model quality relating to formalized description of technologies. The authors give indicators used to assess formalized and textual descriptions of technologies. They raise some questions concerning the analysis of technologies that enable to make a list of indicators. The paper examines decomposition structures of specific technologies and provides the calculations of introduced coefficients.
ALGORITHMIC PROCEDURES FOR CONSTRUCTING ONTOLOGICAL REPRESENTATIONS OF PRODUCTION TECHNOLOGIES
Authors: Mironov Timur , Andreev Dmitry , Bruttan Iuliia , Motaylenko Lilia , Lineva Elena
Published: June 2021

This paper focuses on formalized description of technologies as a category of procedural knowledge. It describes the model of ontological representation of technologies. The authors present the algorithms of staged combined design of unified decomposition constructions that enable to form decomposition structures of technologies. The article introduces the extended algorithm to construct ontological representation of technologies.
DIGITAL DATA PROCESSING BASED ON WAVELET TRANSFORMS
Authors: Timoshevskaya Olga , Londikov Vladimir , Andreev Dmitry , Samsonenkov Victor , Klets Tatyana
Published: June 2021

The paper focuses on the main theoretical principles and properties of wavelet transforms. The problem of digital data processing based on wavelet transforms is considered. The analysis and processing of signals and functions that are non-stationary in time and inhomogeneous in space are presented. The authors propose methods of progressive coefficients’ values that combine wavelet decomposition and quantization, the main purpose of which is to convey the most important piece of information about a signal.
CONCRETE, REINFORCED BY CARBON FIBRE COMPOSITE STRUCTURE, LOAD BEARING CAPACITY DURING CRACKING
Authors: Annamaneni Krishna Kiran , Dobariya Bhumika Vallabhbhai , Andrejs Krasnikovs
Published: June 2021

Different authors conducted studies on fiber reinforced concretes (FRC) with carbon fibres of different lengths and some results showed that concrete mix with homogeneously distributed short fibres in their volume have good strength and ultra-strain compared to normal plain concrete mix. However, this study is focused more on 3-dimensional (3D) carbon fibre reinforced plastic (epoxy) CFRP composite thin rods frame used as a reinforcement in concrete which shows good increase in loadbearing and ductility. Were investigated concrete mixes with superplasticizer, nano-silica, quartz sand, fine natural sand and gravels. Diagonal cross bracing carbon fibre epoxy frames were used as a reinforcement giving better ductility results. Proposed study approach is to show that the reinforced concrete with provided materials have an increased performance in terms of ductility, sustainability, and load bearing in cracked statement. Total, four groups of concrete and each group with three beams were casted and tested in this experiment, three groups with three different shapes of carbon frames and three beams without frames to compare the mechanical properties after 28 days. Failure mechanisms in any particular case were analysed.
PEDAGOGICAL CONDITIONS FOR THE FORMATION OF GRAPHIC CULTURE OF SCHOOL STUDENTS IN THE PROCESS OF USING COMPUTER TECHNOLOGIES
Authors: Grinev Dmitrii , Savraev Igor , Shlat Natalia
Published: June 2021

The aim of the study is the scientific and experimental identification of a complex of effective pedagogical conditions for the formation of the graphic culture of school students in the process of using computer technologies. In the article, based on the analysis of the structure of graphic culture in the system of the general culture of the personality of a student of the XXI century, as well as identifying the features of the use of computer technologies in modern school education, the effectiveness of creating pedagogical conditions for the formation of the graphic culture of school students is theoretically and experimentally substantiated: the use of a complex of program-methodological and pedagogical teaching aids using computer technology, the implementation of an active learning model in the organization of educational activities and the interaction of the teacher and students in the classroom. The article describes an empirical study of the conditions for the formation of the graphic culture of school students in sketching lessons: the diagnosed parameters are determined, a comprehensive test of the level of graphic culture in secondary school students is carried out, an assessment of the effectiveness of the influence of a complex of pedagogical learning conditions on the formation of the graphic culture of students is given. The experiment revealed the need to create special pedagogical conditions that form the basis for the development and implementation of the elective course program “Technical Sketching Using CAD”.
AN ALTERNATIVE APPROACH TO REDUCING AGING OF INNOVATIVE INDUSTRIAL PRODUCTS IN TERMS OF INDUSTRY 4.0
Authors: Petrova Desislava
Published: June 2021

The rapid progress in the field of industrial and information-communication techno-logies and their impact on production systems are putting increasing pressure on the engineering structure. That is why modern technological deve-lopment has created conditions in which innova-tive obsolescence already takes precedence over physical. A particularly important point in this direction is the correct determination of the degree of influence of innovative aging on products and processes in order to establish its impact on the technical, economic and social results of industrial activity. In addition, the impact of this process is globalizing, resulting in innovative obsolescence of technology and lagging behind the level of advan-ced technologies from modern ones world-wide. The further use of innovatively obsolete equipment and technological processes leads to certain losses, the amount of which will depend on the degree of this lag. This report proposes an alternative approach to reducing the innovative obsolescence of industrial products by modernizing and creating sustainability in the engineering space. At the same time, innovative progress in the future will put increasing pressure on the technological structure and on the distinctive features of this process. A theoretical attempt has been made to calculate mathematically innovative aging, and the impact of destructive innovations is difficult to capture with this model.
VERICUT - CONFIGURING CNC SYSTEMS FOR TURNING CENTER WITH SUB-SPINDLE
Authors: Kaldashev Tsvetan
Published: June 2021

This report discusses the configuration of some preparatory and auxiliary commands for the Fanuc 18i TB CNC system for a counter-spindle lathe using special macros called Vericut macros. In most cases, this is necessary because the Vericut library of machines and CNC systems does not have the specific machine and system or do not correspond to the actual ones, i. e. there is no match between them. The need to configure the CNC control system is related to the fact that it is possible to perform simulation, optimization and verification of control programs in a virtual environment before proceeding to the processing of workpieces on the real machine.
INVESTIGATION OF THE INFLUENCE OF THE MODIFIERS P, SR, TI AND COMBINATIONS OF THEM ON THE STRUCTURE AND MECHANICAL PROPERTIES OF ALSI25 ALLOY
Authors: Panov Ivan , Dochev Boyan , Dimova Desislava
Published: June 2021

The most commonly used elements to modify primary silicon crystals in the structure of hypereutectic aluminum-silicon alloys are phosphorus and sulfur. Phosphorus has been shown to have the highest coefficient of modification with respect to the primary silicon and is therefore a preferred modifier. There are also data on the positive effect of the modifiers Sb, Sr, Ti, and B on the silicon crystals in the structure of this type of alloys. The influence of the modifiers phosphorus, strontium, titanium and combinations of them on the size and shape of both the primary silicon crystals and the silicon crystals in the composition of the eutectic of the AlSi25 alloy has been studied in this work. Mechanical tests have been performed to determine both the strength and the plastic parameters of the investigated alloy (in unmodified and modified state). The classic for this type of alloys modifier - phosphorus - has been introduced into the melt by the ligature CuP10. Strontium has been introduced by the ligature AlSr10, and titanium - by the ligature AlTi5B1, the two ligatures in the form of rods. The investigated alloy has also been modified by combinations of the used modifiers: phosphorus and strontium, phosphorus and titanium.The influence of the used modifiers on the structure and mechanical properties of AlSi25 alloy has been discussed.
METHODS FOR MEASURING LASER POWER
Authors: Lazov Lyubomir , Karadzhov Tsanko
Published: June 2021

Today we are witnessing the rapid development of the laser industry. Laser sources with new wavelengths, higher powers and energies, different modes of operation (generation of laser pulses), as well as various applications in industry, medicine, environmental protection etc. are emerging. This requires the development of new physical methods and principles for accurate measurement of power, energy, and other parameters of laser sources. In different types of laser technological processes, accurate measurement of laser power is extremely important in terms of quality, repeatability, and validation of the process. In most cases, accurate laser power measurement is a difficult task, especially when working with high-power lasers or having to perform real-time measurements.The report analyses and systematizes the physical principles and methods on which existing laser measuring instruments are based. This research also aims to help researchers and technologists find and develop new approaches to solving this challenging measurement problem.
CONSEQUENCES OF THE BASIC LAW OF FLAT INTERLOCKING OF INVOLUTE CYLINDRICAL GEARS
Authors: Cvetanov Genadi , Karadzhov Tsanko
Published: June 2021

Three consequences based on the basic law of the flat interlocking have been determined that allow the generation of asymmetric tooth profile on different poloidal circles. Gears with asymmetric profile are used in both mechanical engineering and measuring devices. Qualitative indicators of engagement that cannot be accomplished with a symmetric profile have been developed. A specific example of generation III has been presented. The qualitative indicators of engagement, which are invariant to the parameters of the tool, have been improved.
EVALUATION OF DAMAGE OF ROUNDWOOD ASSORTIMENTS CAUSED BY VARIED CONSTRUCTION, TECHNICAL SOLUTIONS AND CONDITIONS OF HARVESTER HEAD FEED ROLLERS
Authors: Miklašēvičs Ziedonis
Published: June 2021

The purpose of this study was to evaluate the depth of damages caused by harvester head feed roller spikes to birtch veneer logs, harvested according to top diameter group (18x25cm, 25cm), spruce sawlogs (6x10cm), spruce and pine sawlogs according to top diameter group (10x14cm, 14x18cm). Thirteen technical solutions and conditions of the harvester head soft feed rollers (Moipu Standard, Rib), standard feed rollers (Multi-Tree Handling (MTH), Steel Thumbnail) and agreesive feed rollers (TP) were tested in this study.Regulation parameters of hydraulic system and angles of delimbing knife blades during the harvesting of stems in different woodland types and seasonality using single grip harvesters: John Deere 1270E, John Deere 1070E and John Deere 1070D equipped with harvester heads: H754; H480C and H460 were examined in clearcutting and thinning operations in twenty four wood felling sites in Kurzeme and Vidzeme region of Latvia.
LASER ABLATION OF PAINT COATINGS IN INDUSTRY
Authors: Lazov Lyubomir , Angelov Nikolay , Teirumnieks Edmunds , Adijāns Imants , Pacejs Antons , Teirumnieka Ērika
Published: June 2021

A comparison is made between the laser and sandblasting methods for removing paint from industrial facilities. The advantages of laser ablation are discussed. The possibilities of laser paint removal systems - stationary and moving - are shown. The main factors influencing the laser ablation process and the indicators that determine the quality of the obtained surface are systematized. Researchers' publications on this technological process are analyzed.
Caesarean section ‒ global trends (literature review)
Authors: Lebedenko Elizaveta Yu. , Mikhel’son Aleksandr F. , Bespalaya Angelina V. , Sablina Natalia V. , Rymashevskii M. A.
Published: June 2021

Caesarean section (CS) is the most commonly performed surgical operation in the world. Since its introduction in obstetric practice, caesarean section rates have continuously increased in both developed and developing countries. A substantial proportion of this increment was due to unnecessary operations attributable to nonevidencebased indications, professional convenience, maternal request, and overmedicalisation of childbirth. The review examines current data on operative abdominal delivery in the world.
Therapeutic effects of lignans in women in perimenopausal and postmenopausal periods (review of literature)
Authors: Ozolinya Lyudmila A. , Litvinova Valentina V.
Published: June 2021

Today, there is a tendency towards an increase of the number of the female population that has crossed the line of menopause, which makes it more urgent to improve the quality of life of women and to develop safe methods for the prevention and treatment of climacteric syndrome (CS), which is an integral medical, social and economic problems. In view of the presence of contraindications for use and defined risks of complications with the use of hormone menopausal therapy (HRT), it is necessary to develop alternative methods for the prevention and treatment of perimenopausal symptoms. This literary review of domestic and foreign sources demonstrates information about the role of the plant lignan 7-hydroxymatairezinol (7-HMR) in maintaining the physical and psychoemotional health of women in the period of peri- and postmenopause. As a result of the analysis of the therapeutic effects of the 7-HMR molecule, the ability to relieve the main symptoms of CS (neurovegetative presentations and emotional disorders), to improve the general state of health and metabolic profile of perimenopausal women was revealed. High safety and low incidence of side effects were noted, as well as a positive effect on the dynamics of body weight. The presence of a stable anti-inflammatory and antioxidant activity 7-HMR makes it possible to recommend this lignan to women in the climacteric period as an effective drug for the prevention of the formation of immune deficiency, which contributes to the development of oncological and autoimmune diseases. The proven antitumor activity confirms the promise of using the 7-HMR for the implementation of oncopreventive measures in women of peri- and postmenopausal age.
Assessment of reproductive potential in patients after myomectomy
Authors: Van Yan , Romadanova Yuliya A. , Bakhvalova Alla A. , Fedina Ekaterina V. , Zinov’yev Aleksandr A. , Shabanova Dar’ya D. , Bryunin Dmitriy V.
Published: June 2021

The aim of the study is to assess the restoration of anatomical and functional integrity of the uterus and identify changes in hormonal profile in women after laparoscopic and abdominal myomectomy.
Material and methods. 58 patients aged 36,2 5,9 years old with uterine myoma underwent myomectomy: 31 patients underwent laparoscopic myomectomy and 27 patients underwent abdominal myomectomy.
The selection of surgical approach didnt depend on the size, the number and localization of uterine myomas and the patients concomitant pathology.
The hormonal profile of the patients including AMH level was assessed befor myomectomy and in the 6 months after the operation. Postoperative assessment was performed on day 5th8th after surgery and in 1 and 6 months after myomectomy.
Results. No significant differences were found in the processes of reparation of the uterus and in hormonal profile of the patients after laparoscopic or abdominal myomectomy. The time required for the patients reabilitation and for the restoration of the ovarian function and uterine morphological structure was similar in both groups.
Conclusion. The hormonal profile of the patients and the anatomical and functional restoration of myometrium after myomectomy doesnt depend on the surgical approach if myomectomy is performed by an experienced surgeon after the correct assessment of the clinical situation.
The role of cholecalciferol in the pathogenesis of polycystic ovary syndrome
Authors: Safi Aigul T. , Ospanova Aigerim B. , Kalinchenko Svetlana Yu. , Orazov Mekan R.
Published: June 2021

Objective to evaluate and compare clinical, anamnestic and laboratory data of patients with polycystic ovary syndrome (PCOS) and without syndrome, including the level of vitamin 25(OH) D3.
Material and methods. In this work, 81 patients were examined, who, at the 1st stage of the study, were divided into two groups depending on the presence or absence of signs of PCOS. The main group included 51 patients with signs of PCOS. The control group included 30 healthy women without signs of PCOS, matched by sex and age with the main group. The main and control groups were compared by clinical and anamnestic data, including birth weight, by the presence of complications of pregnancy and childbirth in their mothers during their gestation, by the level of vitamin D. PCOS was verified on the basis of diagnostic criteria Rotterdam (2003) and International guidelines on PCOS (2018). Vitamin 25(OH)D3 was determined by mass spectrometry (ng/ml).
At the 2nd stage of the study, the main group with PCOS was divided into 2 subgroups depending on the waist circumference (WT). Subsequently, the subgroups were compared with each other in the same parameters as at stage 1, as well as in the level of insulin, low-density lipoprotein (LDL), triglycerides (TG), anti-Mllerian hormone (AMH), follicle-stimulating hormone (FSH) and luteinizing hormone (LH). To reflect the statistical results, the parametric parameters of the Students t-test were applied for two independent samples with equal or different variance. For nominal data Pearsons Chi-test, when the means are not calculated and a test is carried out for the presence of a relationship between nominal variables.
Results. There was no statistically significant difference in vitamin 25(OH)D3 levels in patients with and without PCOS. Statistically significant differences in vitamin 25(OH)D3 levels were found in women with PCOS, depending on the waist circumference (WT). In these subgroups, differences were also found in the level of insulin, LDL, TG.
Conclusion. The values of the level of vitamin 25(OH)D3 do not differ in the groups of patients with PCOS and without PCOS, but significantly correlate with the metabolic profile of patients.
The method of stopping continuing bleeding in case of through-and-through lung injury
Authors: Kolobkov Artemii K. , Markevich Vitaliy Y.
Published: June 2021

The analysis of the structure of chest injuries in peacetime and wartime was carried out; a statistical analysis of the staged treatment of patients with ongoing bleeding with a perforating wound of the lungs during the war in Afghanistan, armed conflicts in the North Caucasus and according to the case histories of patients of the clinic of military-field surgery. The structure of the life-threatening consequences of chest injuries during military conflicts included continuing bleeding developing in 22.5% of cases with a through wound of the lungs; in peacetime in 18.6% of cases. The medical and technical requirements for the method of stopping the ongoing bleeding with a through wound of the lungs are formulated. Biological models of ongoing bleeding with a through wound of the lungs have been developed to conduct tests of the developed method. A method of stopping continuing bleeding in case of through-and-through lung injury in accordance with medical and technical requirements has been developed. The high efficiency of the developed method of stopping bleeding in case of through lung injury was experimentally confirmed (6 figures, 4 tables, bibliography: 7 refs).