bluuebunny/crossref_metadata_2025 huggingface dataset:
Dual Plasticizer/Thermal Stabilizer Effect of Epoxidized Chia Seed Oil (Salvia hispanica L.) to Improve Ductility and Thermal Properties of Poly(Lactic Acid)
Authors: Dominguez-Candela Ivan , Ferri Jose Miguel , Cardona Salvador Cayetano , Lora Jaime , Fombuena Vicent
Published: April 2021

The use of a new bio-based plasticizer derived from epoxidized chia seed oil (ECO) was applied in a poly(lactic acid) (PLA) matrix. ECO was used due to its high epoxy content (6.7%), which led to an improved chemical interaction with PLA. Melt extrusion was used to plasticize PLA with different ECO content in the 0–10 wt.% range. Mechanical, morphological, and thermal characterization was carried out to evaluate the effect of ECO percentage. Besides, disintegration and migration tests were studied to assess the future application in packaging industry. Ductile properties improve by 700% in elongation at break with 10 wt.% ECO content. Field emission scanning electron microscopy (FESEM) showed a phase separation with ECO content equal or higher than 7.5 wt.%. Thermal stabilization was improved 14 °C as ECO content increased. All plasticized PLA was disintegrated under composting conditions, not observing a delay up to 5 wt.% ECO. Migration tests pointed out a very low migration, less than 0.11 wt.%, which is to interest to the packaging industry.
An FPGA-Based Hardware Accelerator for CNNs Inference on Board Satellites: Benchmarking with Myriad 2-Based Solution for the CloudScout Case Study
Authors: Rapuano Emilio , Meoni Gabriele , Pacini Tommaso , Dinelli Gianmarco , Furano Gianluca , Giuffrida Gianluca , Fanucci Luca
Published: April 2021

In recent years, research in the space community has shown a growing interest in Artificial Intelligence (AI), mostly driven by systems miniaturization and commercial competition. In particular, the application of Deep Learning (DL) techniques on board Earth Observation (EO) satellites might lead to numerous advantages in terms of mitigation of downlink bandwidth constraints, costs, and increment of the satellite autonomy. In this framework, the CloudScout project, funded by the European Space Agency (ESA), represents the first time in-orbit demonstration of a Convolutional Neural Network (CNN) applied to hyperspectral images for cloud detection. The first instance of this use case has been done with an INTEL Myriad 2 VPU on board a CubeSat optimized for low cost, size, and power efficiency. Nevertheless, this solution introduces multiple drawbacks due to its design not specifically being for the space environment, thus limiting its applicability to short-lifetime Low Earth Orbit (LEO) applications. The current work provides a benchmark between the Myriad 2 and our custom hardware accelerator designed for Field Programmable Gate Arrays (FPGAs). The metrics used for comparison include inference time, power consumption, space qualification, and components. The obtained results show that the FPGA-based solution is characterized by a reduced inference time, and a higher possibility of customization, but at the cost of greater power consumption and a longer Time to Market. As a conclusion, the proposed approach might extend the potential market of DL-based solutions to long-term LEO or interplanetary exploration missions through deployment on space-qualified FPGAs, with a limited cost in energy efficiency.
Detecting and Analyzing the Evolution of Subsidence Due to Coal Fires in Jharia Coalfield, India Using Sentinel-1 SAR Data
Authors: Riyas Moidu Jameela , Syed Tajdarul Hassan , Kumar Hrishikesh , Kuenzer Claudia
Published: April 2021

Public safety and socio-economic development of the Jharia coalfield (JCF) in India is critically dependent on precise monitoring and comprehensive understanding of coal fires, which have been burning underneath for more than a century. This study utilizes New-Small BAseline Subset (N-SBAS) technique to compute surface deformation time series for 2017–2020 to characterize the spatiotemporal dynamics of coal fires in JCF. The line-of-sight (LOS) surface deformation estimated from ascending and descending Sentinel-1 SAR data are subsequently decomposed to derive precise vertical subsidence estimates. The most prominent subsidence (~22 cm) is observed in Kusunda colliery. The subsidence regions also correspond well with the Landsat-8 based thermal anomaly map and field evidence. Subsequently, the vertical surface deformation time-series is analyzed to characterize temporal variations within the 9.5 km2 area of coal fires. Results reveal that nearly 10% of the coal fire area is newly formed, while 73% persisted throughout the study period. Vulnerability analyses performed in terms of the susceptibility of the population to land surface collapse demonstrate that Tisra, Chhatatanr, and Sijua are the most vulnerable towns. Our results provide critical information for developing early warning systems and remediation strategies.
GENDER ASPECTS IN THE FORMATION OF PROFESSIONAL ORIENTATION OF SUBJECTS OF SPORTS ACTIVITIES
Authors: Bulhakova Tetiana , Zhukova Galіna
Published: April 2021

Gender stereotypes are intertwined in relations in society, reflect gender differences, and consolidate traditional gender roles. The concept of gender stereotype means the ability of a person to generally assess the relationships of people in the world and is the basis for inferences and uncritical conclusions. The positive function of stereotypes is the person will be able to react quickly to the changes even with limited data. The process of cognition is a reflection of objective reality, in which stereotypes often have a conservative effect. They form erroneous knowledge and ideas, which negatively affect the processes of interpersonal interaction.
PROTESTANT ENVIRONMENT OF UKRAINE: IN SEARCH OF RELIGIOUS TYPOLOGIES (ON THE EXAMPLE OF THE ALLUKRAINIAN UNION OF CHURCHES OF EVANGELICAL CHRISTIAN BAPTISTS)
Authors: Kunderenko Ivan
Published: April 2021

Applying the typology of R. Niebuhr to the Protestant environment of Ukraine is nearly impossible, because despite the preserved faith statements, the level of involvement of Protestants in Ukrainian society has changed significantly. Thus, the usual classification is not efficient due to the dynamics of the social dimension of Protestants and the background of theological conservatism. Author agrees with the proposed paradigm of D. Hollinger, that in any interaction with society there are two dimensions, in the middle of which we can make a certain ranking. The impact can be individual or structural, as well as reactionary or preventive. The following vectors have become especially common among Protestants: 1. Christian relief; 2. Creating alternative Christian institutions; 3. Evangelism, not just a method to introduce beliefs to others, but also as a vehicle of structural changes in society; 4. Prophetic proclamation as a way to react on existing negative trends; 5. Political lobbying with an attempt to prevent the adoption of certain bills, or vice versa, their promotion; 6. Creation of political parties or political groups; 7. Nonviolent resistance; 8. The practice of Christian incarnation as a manifestation of faithfulness to God with the understanding that the attainability of ethical standards is possible only within the Christian community; 9. Individual impact with understanding that Christians hold views and moral (ethical) principles that differ from secular society, however Christians apply those principles, within and outside boundaries of Christendom.
Synergy Effect of K Doping and Nb Oxide Coating on Li1.2Ni0.13 Co0.13Mn0.54O2 Cathodes
Authors: Kim Hyung Gi , Park Yong Joon
Published: April 2021

The Li-rich oxides are promising cathode materials due to their high energy density. However, characteristics such as low rate capability, unstable cyclic performance, and rapid capacity fading during cycling prevent their commercialization. These characteristics are mainly attributed to the phase instability of the host structure and undesirable side reactions at the cathode/electrolyte interface. To suppress the phase transition during cycling and interfacial side reactions with the reactive electrolyte, K (potassium) doping and Nb oxide coating were simultaneously introduced to a Li-rich oxide (Li1.2Ni0.13Co0.13Mn0.54O2). The capacity and rate capability of the Li-rich oxide were significantly enhanced by K doping. Considering the X-ray diffraction (XRD) analysis, the interslab thickness of LiO2 increased and cation mixing decreased due to K doping, which facilitated Li migration during cycling and resulted in enhanced capacity and rate capability. The K-doped Li-rich oxide also exhibited considerably improved cyclic performance, probably because the large K+ ions disturb the migration of the transition metals causing the phase transition and act as a pillar stabilizing the host structure during cycling. The Nb oxide coating also considerably enhanced the capacity and rate capability of the samples, indicating that the undesirable interfacial layer formed from the side reaction was a major resistance factor that reduced the capacity of the cathode. This result confirms that the introduction of K doping and Nb oxide coating is an effective approach to enhance the electrochemical performance of Li-rich oxides.
Innovation in sports organizations
Authors: Osokin N.A.
Published: April 2021

This paper analyzes the distinctive features of innovation in sport. Namely, the authors assess the various components of the innovation process in sports organizations. It was determined that the key aspect of sports innovation is the need to balance between individual organizational and collective goals. Sports organizations form meta-organizations that broaden the innovation potential by providing access to a larger resource and knowledge base as well as facilitating constant information flow. In conclusion this study proposes an approach to collecting innovation data on sports organizations.
About the project approach to diversification management of defense industry enterprises
Authors: Ershova I.V. , Murukina A.D. , Prilutskaya M.A. , Shcholokov V.F.
Published: April 2021

The diversified growth strategy is one of four reference strategies that have been actively pursued by companies operating in open markets since the middle of the last century. Today, this task at the state level has been set for defense enterprises, where the production process is fundamentally different from civilian production. The article discusses the directions of the defense industry diversification. The author's approach to the classification of strategies for diversified growth in relation to the defense industry enterprises is proposed. A review of regulatory legal acts on the use of the term "Defense industry enterprises diversification" is carried out; the author's interpretation of the definition is given. Current problems of the production of high-tech civilian and dual-use products by enterprises of the Sverdlovsk region are considered; the project approach to diversification management is proposed.
Problems of innovative strategic development of the defense complex
Authors: Agalarov Z.S.
Published: April 2021

The article deals with the problems of innovative strategic development of the Russian defense complex. The periods of conversion development in Russia, USA and China are analyzed. An assessment of the effectiveness of conversions in these countries is given.
Model Updating of a Euler-Bernoulli Beam Using the Response Method
Authors: İNAN Cevher Yusuf , OKTAV Akın
Published: April 2021

In this study, the computational model is updated using an analytical model instead of an experimental one. Continuous and discrete parameter models of a Euler–Bernoulli beam are constructed analytically and computationally. To construct the computational models, Ansys™ software is employed, and 1-D beam elements are chosen to get the finite element model of a cantilever beam. To get analytical solutions for the continuous and discrete parameter models, a state-space representation is employed. In the first step, only mass and stiffness matrices are considered to model the beam. Eigenfrequencies and eigenvectors of the beam are calculated. The analytical and computational eigenfrequencies of continuous and discrete parameter models are compared. In the seconds step, non-proportional viscous damping and non-proportional structural damping matrices are introduced into the analytical discrete parameter model. Then, the frequency response functions of the model are generated. The damping matrices are identified using the generated frequency response functions. The damping matrices used in the analytical model, and the damping matrices identified using the frequency response functions are compared. It is observed that the assigned damping matrices and the identified damping matrices are identical, which shows that the computational model can be accurately updated provided the FRFs are available.
On the possibility of assessment of the level of safety culture automation on the basis of observation of current parameters
Authors:   Institute of Mathematical Machines and Systems Problems, Begun V.V. , Voloshyn P.O. ,   Private enterprise
Published: April 2021

Safety culture (SC) is a modern paradigm of safety management of ultra-complex technical systems, primarily NPPs. According to the latest researches, the probability of an error made by a human, who professes the principles of safety culture, and the occurrence of accidents in general, compared to previ-ous methods of safety management, is reduced by hundreds of times. Therefore, it is necessary to pro-vide support as much as possible at all levels of government, to train all specialists and explore new pos-sibilities of this paradigm. This article is aimed at developing offers for an algorithm for automated as-sessment of the level of SC power units based on current indicators and indicators of structural units with a selected discreteness in order to further develop an appropriate cloud-based software which will eliminate subjectivism and record the smallest deviations, which, in its turn, will allow to take appropri-ate measures to improve the safety of nuclear power plants in the early stages of negative processes. The term «safety culture» was first formulated by the IAEA in 1986 in the course of the analysis of the causes of the Chernobyl disaster, and published in INSAG-1. The report stated that the lack of safety culture was one of the main causes of the disaster. Safety culture is defined as a set of values and ac-tions that occur as a result of an agreement reached in the team between the top managers and employ-ees to give security the highest priority in order to protect people and the environment. Further under-standing of this concept has led to a new perspective on the causes of other accidents and incidents at nuclear power plants that occurred in the past. The experience of NPP operation shows that their occur-rence is somehow related to people's behavior (namely, their attitude to safety issues), i.e., the current state of the level of safety culture. But as a current safety parameter (SC) it is estimated with a long pe-riod of time. The article offers automation of the assessment process.
Critical Thinking Development of Primary School Pupils by Means of Inventive Problems
Authors: Gavrysh Iryna , Dotsenko Svitlana
Published: April 2021

The purpose of the research is to determine the effective tools for the critical thinking development for primary school pupils.

Methodology. The retrospective analysis of the primary education systems development in Ukraine and in highly developed countries was used, the primary school is determined to be the initial stage of the pupils’ critical thinking development. The material of the study is primary school educational programmes, branches of education, and existing academic subjects, it indicates the necessity to develop and implement the particular subject, and its aim is to develop critical thinking and the abilities to express one’s own opinion, assess risks and solve problems. According to the State Standard of Primary Education the key competencies require the following skills: creativity; initiative; the abilities to justify one’s position logically, to manage emotions constructively, to assess risks, to make decisions, to solve problems, to cooperate with others.

Results. The article clarifies that critical thinking is a type of thinking aimed at solving problems, namely studying the argument line (hypotheses, criteria, definitions, arguments, facts, etc.), analyzing alternative solutions; forecasting and assessing consequences. It is proved in practice that inventive problems serve as an effective way to develop critical thinking. The basis of such problems is the theory of inventive problem solving (TIPS). It is determined that an inventive problem contains a cognitive contradiction, its solving promotes the pupils’ critical thinking development. The authors’ subject ‘Eureka’ for pupils of 2-4 classes is offered. Its aim is to develop pupils’ critical thinking, creative and inventive abilities, and also primary skills to carry out natural science researches. The results of the subject approbation are given.

Conclusions. Primary school pupils’ critical thinking development can be achieved through the introduction of a range of new subjects at the initial stages of education. The aim of such subjects is to teach pupils to solve inventive problems.
Comparative Analysis of Distance Learning Systems in the United Arab Emirates and the United States of America
Authors: Nalyvaiko Oleksii , Khomenko Albina , Vereshchak Daria , Poliakov Danilo
Published: April 2021

The article is devoted to the current problem of distance learning. In the theoretical field, various aspects of the functioning of distance education are considered on the example of the analysis of the works of leading scientists in this field.
The main aims of this research are: to analyze some of the best educational systems in the world (including distance learning) – systems of the USA and the UAE; to describe the main features of distance education in the USA and the UAE; to make some proposals, based on the experience of these countries, to optimize the system of distance education in Ukraine; to analyze the opportunities of their implementation and adaptation in Ukrainian education institutions. The theoretical basis of the study was open sources of information and educational portals of leading higher education institutions in the UAE and the United States.
The methodology is the following. The theoretical framework of the study presents the leading experience of implementing distance learning of students in the context of state and educational policy of the represented countries. A comparative analysis of educational systems in the UAE and the United States is done within the framework of the introduction of distance learning.
The study presents the research results, they are the proposals for optimizing the process of distance learning in Ukraine based on the experience of the UAE and the United States. The main ones are: development of criteria, requirements and recommendations for distance learning based on the following indicators: a) the amount of educational material; b) course duration; c) duration of the lesson d) technical requirements (e.g., the availability of a headset, a stable Internet connection, etc.); providing students and pedagogical staff with the necessary material and technical resources and checking the compliance of material and technical support with the educational requirements; establishment of centers for quality control of the distance learning process.
The conclusions present the prospects of the study: developing of future comparative studies of distance learning systems; finding the most effective ways to make distance learning process better; elaborating and reasoning new approaches of teaching in the conditions of distance learning; setting up new platforms, applications, videos and so on in order to provide the process of distance learning; finding perspective directions of developing distance education and so on.
The Peculiarities of Teaching Foreign Languages by Means of Information and Communication Technologies
Authors: Shevchuk Anna
Published: April 2021

The paper investigates the peculiarities of teaching foreign languages by means of Information and Communication Technologies (ICT). In the course of a comprehensive study the most effective for the development of students’ linguistic and communicative competence, the following types of ICT were singled out and analysed: Internet-based project work, online correspondence by e-mail, chat, blogs, wikis and podcasts and training programs.

The aim of the article is to identify the peculiarities of teaching foreign languages by means of ICT

The theoretical, empirical and statistical methods have been used to reach the purpose. To check the effectiveness of applying ICT in teaching foreign languages empirical (diagnostic) methods such as testing, observation and discussion were used. The pedagogical experiment with the fourth-year students of Simon Kuznets Kharkiv National University of Economics was conducted. The pedagogical experiment showed the effectiveness of developing foreign language activity by means of ICT.

The statistical methods helped to evaluate the results of the research. Using ICT is really helpful to increase students’ language competencies and, respectively, it provides the development of foreign language communicative competence in general.

Conclusion: ICT creates a new environment and opportunities for foreign language acquisition; they have become an important educational tool successfully used in foreign language teaching.
PERTINENCIA DE LOS POSGRADOS MÉDICOS EN COSTA RICA
Authors: Sancho Ugalde Hilda , Cerdas Salas Oscar , Ureña Villanueva Stefany
Published: April 2021

Se hace un análisis del desarrollo de los posgrados médicos en Costa Rica, así como del desarrollo del sector salud a nivel nacional y de los factores que han incidido en la formación de especialistas y las demandas del país sobre este recurso humano.  Varios factores inciden en su pertinencia: el cambio de la pirámide demográfica, el avance de la tecnología en el campo de la medicina, el aumento de la población migrante, y los procesos de jubilación de los profesionales médicos.  El resultado señala la necesidad de continuar con la formación de este recurso humano, pertinente para el logro de cubrir las necesidades que en el campo de la salud requiere el país.
PILEFLEBITIS POSTERIOR A APENDICITIS AGUDA
Authors: García Quirós Christian , Alfaro Alfaro Jairo
Published: April 2021

La pileflebitis o piletromboflebitis corresponde a la trombosis séptica de la vena porta y de sus ramas debido a un foco infeccioso a nivel intraabdominal. Entre las etiologías más frecuentes podemos encontrar la diverticulitis, la apendicitis y colangitis. También se puede asociar a estados de hipercoagulabilidad, neoplasias y deficiencia de factores de la coagulación.

El tratamiento se enfoca en la erradiación del foco infeccioso mediante terapia antibiótica y en la prevención de su extensión e isquemia mesentérica mediante la anticoagulación.

Describimos el caso de un paciente con antecedente de apendicitis aguda quien desarrolla trombosis séptica de la vena porta, esplénica y mesentérica superior
HIPOTIROIDISMO DURANTE EL EMBARAZO
Authors: Alvarado Rodríguez Valeria Lucía , Fonseca Figueroa José Daniel , Morales Vindas Verónica
Published: April 2021

Resumen

Las enfermedades tiroideas están entre los trastornos endocrinos más frecuentemente reportados durante el embarazo, en parte debido a los cambios fisiológicos que ocurren principalmente en el primer trimestre. En pacientes embarazadas, el hipotiroidismo clínico tiene una prevalencia de 0.3-1.9%, mientras que el hipotiroidismo subclínico de 1.5-5%. Estos porcentajes dependen de diferentes variables como la ingesta de yodo. Se ha visto que el hipotiroidismo generalmente representa un riesgo para la unidad materno-fetal, por lo que se debe tener en cuenta el rango de referencia trimestral de TSH según la población para realizar un diagnóstico apropiado. El tratamiento consiste en levotiroxina oral, según las metas establecidas. Además, la captación de aquellas pacientes que presenten factores de riesgo, así como aquellas con diagnóstico previo de hipotiroidismo permite darles el seguimiento adecuado. Por lo anterior, es necesario que los diferentes servicios cuenten con bases de datos a nivel regional o nacional para establecer rangos de referencia trimestrales específicos para la población.
Detailed Analysis and Identification of Key Factors Resulting in Motor Accidents Across the UK
Authors: Garg Harshita
Published: April 2021

Motor accidents across the globe amount to a large number of deaths every year. The collisions result in not just the personal injury to people involved but also in the loss of money to the motor insurance companies, trauma to the people involved, and added pressure on the emergency services. With the help of data analytics techniques, this project aims to identify critical factors that might contribute to the accidents. Upon investigating the temporal features and geo-spatial features of the motor accident locations, we tried to establish a correlation between the accident intensity and its key factors. For this exploratory analysis, we also considered weather conditions and daily average traffic flow data. We then trained Supervised learning models on the data to find out the best performing multi-label classification model.
Exploring the Difficulties Encountered by the Non-English Department Students in Learning the English Language: A Study on the Tertiary Level of Education in Bangladesh
Authors: Jelane Md. Musrifur
Published: April 2021

Most of the non-English departments at the tertiary level of education in Bangladesh conduct the English language course for the development of English language skills of the non-English department students. However, the non-English department students at the tertiary level of education in Bangladesh face many troubles in learning the English language efficiently. The purpose of this study was to explore the difficulties encountered by the non-English department students at the tertiary level of education in Bangladesh in learning the English language. This study followed a quantitative research approach. Data collected from 100 non-English department students both from public and private universities of Bangladesh through survey questionnaires and semi-structured interviews. The findings of this study disclosed that the non-English department students face the most difficulty in productive skills (speaking and writing). Moreover, duration of the class and semester, syllabus design, needs analysis, classroom techniques, and methods are the significant factors that affect the English language learning of the non-English department students.
Lebenswege erzählen. Rekonstruktion biographischer Bewältigungsstrategien von Adoleszenten am Übergang Schule-Beruf
Authors: Siegert Karolina
Published: April 2021

Die vorliegende Studie beleuchtet mit Hilfe eines biographischen Forschungszugangs die Komplexität des Übergangsprozesses von benachteiligten Jugendlichen am Übergang von der Schule ins nachschulische Leben. Entgegen der gängigen Betonung der Ablösung vom Elternhaus wird im Rahmen der Arbeit die anhaltende familiale Bedeutung in der Lebensphase herausgearbeitet. Das Konzept der Entwicklungsaufgaben wird daher intergenerational konturiert und ungleichheitstheoretisch ausgeleuchtet. Die Ergebnisse zeigen, dass die Eltern und ihre (Berufs-)Biographien eine hohe Bedeutung für die eigene Übergangsgestaltung der Adoleszenten haben. Die biographischen Texte illustrieren die jeweiligen Bewältigungs- und Gestaltungsstrategien der Jugendlichen, die Konsequenzen für eine biographieorientierte Beratung am Übergang zulassen. Weiterhin lassen die Erkenntnisse Implikationen für Hochschullehre zu, indem biographieanalytische und ungleichheitstheoretische Aspekte in der Adoleszenzphase im Lehrplan verankert werden. (DIPF/Orig.)
Influence of the Leningrad Nuclear Power Plant on Zooplankton and Zoobenthos of the Gulf of Finland Koporskaya Guba
Authors:   Kulakov D.V., Makushenko M.Y., Vereshchagina Y.A.
Published: April 2021

The effects of warm water discharge from Leningrad nuclear power plant (Leningrad NPP) on the physical, chemical and biological properties of a natural water pond (Gulf of Finland Koporskaya Guba) were studied during 2010–2014 period. Quantity and biomass changes in environmental occupied benthic and plankton communities were studied for water pollution assessment. Data collected by IEG RAS were used for assessing of the ecological state of Koporskaya Guba as a cooling pond of Leningrad NPP.
Aquatic Vegetation Role in the Processes of Water Bodies Self-purification in Terms of Oil Products
Authors:   Bondarenko V.V., Suchkova N.B.
Published: April 2021

Issues of the aquatic vegetation involvement into processes of water environment self-purification from oil products pollution have been discussed. The role of plants both in provision of favorable conditions for destructors and in direct destruction has been shown. The significance of submerged vegetation for creation of conditions to intensify oil products oxidation, as well as its role in the polyaromatic hydrocarbons transformation has been outlined.
Long-term Dynamics of Ammonia Nitrogen Content and Runoff in the muddle Amur Water
Authors:   Shesterkin V.P., Shesterkina N.M.
Published: April 2021

The long-term dynamic of the content and runoff of ammonia nitrogen in the water of the Middle Amur are discussed. There are decreasing of ammonia runoff in 1.4 times in comparison with 1981-2000, and dominance of nitrate nitrogen in runoff of mineral forms in recent years. Trends in runoff changes are due to transformation on the watershed. At present anthropogenic components of runoff is formed by the Songhua River runoff and is more pronounced in the wintertime.
Copper (II) Sorption out of Water systems modified with Aluminum Silicates in Dynamic Conditions
Authors:   Khuramshina I.Z. Nikiforov A.F., Lipunov I.N., Nekrasov A.V., Ushakova L.I., Baranova O.Y.
Published: April 2021

Parameters of the sorption processes of Cu2+ extraction from water systems with natural aluminum silicate and its modified forms in dynamic conditions have been considered. The optimal conditions of Cu2+ concentration, sorbent element composition before and after Cu2+sorption processes have been found. Some prepositions on the nature of copper and sorbents interaction have been made.
Development and Substantiation of Regional Water Quality Standards in Respect of Heavy Metals Content for the Upper Kama Basin Water Bodies
Authors:   Venitsianov E.V., Miroshnichenko S.A., Lepikhin A.P., Gubernatorova T.N.
Published: April 2021

The paper presents a new methodology for establishing regional water quality standards for the Upper Kama water bodies. Water bodies of the Upper Kama Basin are receiving wastewater from one of the largest industrial complexes of the Kama basin – Solikamsk-Berezniki industrial hub. The approach takes into account factors that determine the content of heavy metals in natural waters and the spatial/temporal variability of their content in the water bodies of the Upper Kama basin. The developed approach is implemented in establishment of regional water quality standards for the Upper Kama basin.
Comparative Analysis of Water Resources Use Effectiveness in the West Siberia Regions in Comparison with the Russian and West European Levels
Authors:   Rybkina I.D.
Published: April 2021

Analysis of the world experience in water resources use effectiveness assessment has been done. The water consumption dynamics in the West Siberia regions over the 1995–2013 period has been shown, comparison of the use effectiveness with the Russian and West European (Germany as an example) levels has been carried out. Critical significance of the regions’ sector specialization for specific water consumption and water consumption per pros regional product unit has been revealed.
Reduction of Cesium Radio/nuclides from Natural Waters and Liquid Radioactive Waste
Authors:   Nogovitsina E.V., Voronina A.V., Betenekov N.D., Nikiforov A.F.
Published: April 2021

Life tests on treatment with a ferrocyanidic sorbent of natural waters radioactively contaminated with 137Сs have been conducted. The sorbent’s operational characteristics have been investigated in the prolonged filter cycle mode. Assessment of the sorbent’s applicability for the cesium radio nuclides reduction in natural waters radio/chemical analysis methods has been carried out. The determined sorbent resource was 120 thousand of columnar volumes, while potential calculated resource was 400 thousand of columnar volumes. The sorbent’s effectiveness in radiochemical analysis has been proved, cesium yield was (0.97 ± 0.02) in radiochemical analysis of aquatic media.
Epidemiological Features of the Incidence of COVID-19 in Moscow in the Period
from March 1 to August 31, 2020
Authors: Ivanenko AV , Soloviev DV , Volkova NA , Glinenko VM , Smirnova OA , Shvedova IS , Bakhmutskaya EV , Melnikov DA
Published: April 2021

Introduction: Coronavirus (SARS-CoV-2) infection is a global healthcare and social problem due to a rapid ubiquitous spread of the virus, a high rate of complications and deaths. The disease is often asymptomatic, which can contribute to its spread, while the most common complication is the development of pneumonia with or without acute respiratory failure and respiratory distress syndrome, which are often fatal. These characteristics of the disease, along with the almost complete lack of immunity in the population around the world (before the mass spread), allowed SARS-CoV-2 to spread freely among the population of all countries. Our objective was to assess the epidemiological features of the incidence of the novel coronavirus disease (COVID-19) in the population of the city of Moscow. Materials and methods: We conducted a retrospective analysis of all confirmed COVID-19 cases, the total number of diagnostic tests for COVID-19, and the incidence of upper respiratory tract infections registered in Moscow from March 1 to August 31, 2020. The correlation analysis was performed by calculating the Spearman’s correlation coefficient and subsequent statistical significance of differences in the compared relative values (p) from the Student’s t-test. Confidence intervals were determined with the calculation of average errors of the compared variables – m(σ). Conclusion: The revealed features of the COVID-19 incidence in Moscow help establish the factors influencing the development of the epidemic process in the city and give an accurate prediction of the COVID-19 situation for the future.
Effects of Meteorological Factors on COVID-19 Incidence and Mortality
in Moscow in April–June 2020
Authors: Krivosheev VV , Stolyarov AI
Published: April 2021

We studied the impact of meteorological factors including atmospheric pressure, relative and absolute humidity, air temperature, wind speed, and precipitation quantity on COVID-19 incidence and mortality rates in Moscow during the first wave of the pandemic from 1st April to 25th June 2020 using a correlation analysis. The calculations created new scientific knowledge about the effects of fluctuations in average daily values of weather parameters on the dynamics of the COVID-19 pandemic and demonstrated their statistical significance. We established that meteorological factors had a greater influence on the incidence than on mortality from the novel coronavirus disease. Atmospheric pressure and wind speed had the strongest effect on incidence and mortality rates of Muscovites while air temperature and precipitation quantity demonstrated the least impact. Correlation coefficients of 0.50–0.70 enabled us to assert that the meteorological factors start influencing the incidence and mortality 6 to 8 weeks before the disease onset. Based on empirical data, we also estimated that the most likely period between the disease onset and death of COVID-19 patients ranged from 8.63 to 22.13 days, the average being 12.63 days. The resulting statistical patterns demonstrate high convergence with actual data and international experience and allow determination of the degree of influence of meteorological conditions on the development of the COVID-19 pandemic in different periods and prognosis of the worst scenarios in the city enabling appropriate and timely preventive measures.
Spatial Distribution Of Chlorofil-a In Laguna Kabori Manokwari Regency
Authors: Warnetti Suci Widya , Pattiasina Thomas Frans , Saleh Fitriyah Irmawati  Elyas , Alianto Alianto , Talakua Selfanie , Matulessy Marthin
Published: April 2021

Kabori Lagoon is a lagoon located in Manokwari Regency, West Papua, where the water quality data is still very limited. Chlorophyll-a is the most important photosynthetic pigment for aquatic plants such as phytoplankton. The purpose of this study was to determine the horizontal distribution of chlorophyll-a based on the spatial data approach in the waters of the Kabori Lagoon. The study was conducted from April to May 2019. The sampling point was determined by purposive sampling at eight points for sampling of chlorophyll-a and water parameters including physics and chemistry (temperature, DO, salinity, brightness and depth). Measurement of physical and chemical parameters is carried out in situ. Chlorophyll-a analysis was carried out at the Laboratory of Water Productivity and Quality, Faculty of Marine and Fisheries Sciences, Hasanuddin University. Spatial data processing used ArcGIS 10.4 and Surfer 16 to create chlorophyll-a distribution maps and bathymetry. The results showed that the chlorophyll-a content in Observation I was in the range of 0.12-2.40 mg/m3 and in Observation II it was in the range of 1.43-10.84 mg/m3. Based on the chlorophyll-a content, the Kabori Lagoon is included in the mesotrophic category. Spatially, the distribution of chlorophyll-a content varies, but tends to be higher in the southern part of the lagoon than in the northern part of the lagoon.

 Spatial distribution, Chlorophyll-A, Kabori Lagoon, Mesotrophic
La inversión fija en el sector manufacturero mexicano 1985-94: El rol de los factores financieros y el impacto de la liberalización financiera
Authors: Gelos Gaston , Werner Wainfeld Alejandro
Published: April 2021

En este trabajo se estudian los efectos de los factores financieros, como el flujo de caja y el valor del colateral de las empresas, sobre la inversión fija en el sector manufacturero mexicano. Para este fin se utiliza la Encuesta Industrial Anual, recopilada por el INEGI. En un primer análisis, se examina el efecto de diversas variables macroeconómicas sobre la inversión, donde se obtiene el resultado de que la relación entre la tasa de interés real y la inversión cambia de positiva a negativa después del inicio de la liberalización financiera. En la parte principal del estudio, se analiza la importancia de las restricciones de financiamiento, investigando el efecto del flujo de caja y del valor de los bienes raíces (como una medida de colateral) sobre la formación de capital fijo. Estimaciones no paramétricas indican una clara relación entre el flujo de caja y la inversión. Los resultados de un método estándar, en el cual se incluye el flujo de caja en regresiones de inversión convencionales, indican que las restricciones de liquidez influyeron en forma importante sobre la inversión, especialmente en el caso de las empresas pequeñas. Esta clase de empresas, en particular las exportadoras, parecen haber sido las más favorecidas por la liberalización financiera. Mediante un enfoque novedoso, se consideró el alto número de observaciones con cero inversión y la posibilidad de que existan costos fijos en el proceso de inversión, por lo que se estimó un modelo Tobit con efectos fijos incluyendo, además del flujo de caja, el valor de los bienes raíces propiedad de la empresa, como una medida de las garantías con las que cuenta la misma. Se concluye que el valor de los bienes raíces tiene una influencia muy significativa sobre la inversión y que la importancia de este tipo de garantías aumentó después de la liberalización financiera. Debido a esto concluimos que la liberalización se tradujo no tanto en una reducción gradual de la sobretasa del costo de fondos externos sobre el costo de fondos internos, sino más bien en una mayor liquidez en la economía, que recién entonces permitió a muchas empresas el acceso al crédito.
La crisis financiera en Asia: Orígenes y evolución en 1997 y 1998
Authors: del Villar Rafael , Murillo Garza José Antonio , Backal Daniel
Published: April 2021

La crisis financiera que estalla inicialmente en Tailandia en julio de 1997, se ha extendido a nivel regional y global. La crisis ha provocando serias repercusiones económicas, políticas y sociales en Corea, Indonesia, Malasia, Tailandia e incluso, aunque en menor medida, en Japón. La crisis asiática ha tenido una severidad tal que a nivel global ha generado una caída importante en el crecimiento económico mundial y ha afectado la estabilidad del sistema financiero. Las repercusiones han sido especialmente severas en los países de América Latina. Este documento analiza en forma detallada las causas de la crisis y su evolución, así como una descripción de los avances en la resolución de la misma durante 1997 y 1998 en Japón, Corea del Sur, Indonesia, Malasia y Tailandia.
STUDY OF SERUM VITAMIN-D IN TYPE-2 DIABETES MELLITUS PATIENTS.
Authors: Jain Ajay , sarkar Debina , Kaushik G.G. , Sharma Ankita
Published: April 2021

Background: Type-2 diabetes mellitus (T2DM) is a progressive and chronic disease characterized by
both β-cell dysfunction and increased insulin resistance. Diabetes mellitus is now considered a giant
killer disease of the 21st century with its vicious prongs in the South-East Asian countries, specially India, which is rightly said to
be the ''Diabetes Capital'' of the world. Vitamin D has important effects on insulin action, and may impact on a number of
pathways which may be of importance in the development of type 2 diabetes mellitus. Materials & Methods: In this study 62
Type-2 diabetic patients, 62 healthy controls were enrolled. Biochemical analytes measured were Serum glucose (Fasting Blood
Sugar & Post Prandial Blood Sugar), Glycosylated Haemoglobin, Serum Vitamin-D. Results: The mean Serum Vitamin-D in
Type-2 diabetic subjects were (16.3 ±3.0) while in healthy subjects(controls) the values were (39.3±5.2) respectively. These
values were found to be statistically highly signicant(p<0.001). Conclusion: Serum Vitamin-D levels were decreased in Type 2
diabetic subjects as compared to the values in healthy subjects(controls).
GIANT OVARIAN SEROUS CYSTOADENOMA IN PATIENT AFFECTED BY COVID19: EXPERIENCE OF AN EXCEPTIONAL CASE
Authors: Villarreal Vallejo Vanessa Valeria , Negrete Burbano Astrid Estefanía , Pilaguano Socasi Karina Estefanía , Machado Unigarro Priscilla Elizabeth , Revelo Yánez Angélica Patricia
Published: April 2021

In the last 40 years, humanity has been affected by three major pandemics that have claimed many
deaths: the increase in the incidence and prevalence rates of chronic non-communicable diseases, the
pandemic of the immunodeciency virus disease human-AIDS (HIV / AIDS) and currently the pandemic caused by covid-19.
Covid-19 is an emerging viral infectious disease, which has contributed to increasing mortality from chronic diseases in a very
short time. Epidemics of unknown emerging diseases such as covid-19 put to the test not only the technical and human capacity
of health professionals who directly care for the sick, but, and above all, that of health systems and society usually.
For an adequate understanding of this phenomenon, they must be approached with a general approach that integrates many
elements that, otherwise, can only give a partial vision of the matter. Due to the aforementioned, we consider it necessary to
present this clinical case, based on ovarian pathology of a positive patient for the new coronovarirus and its subsequent
interdisciplinary management.
Giant ovarian cysts are considered this way when they weigh more than 12 kilos. They are a rare entity today. By denition, a
cystic growth of the ovary must be at least 3 cm in diameter to be called a cyst.
In the 1970s and 1980s, 20 cases of cysts greater than 20 kg were reported in the world literature. Ovarian tumors are not as
common as those of the uterus and breast. They constitute the third group of benign and malignant tumors in women. Ovarian
serous cystadenoma arises from the supercial (coelomic) epithelium, made up of cystic areas.
There are macroscopically small tumors and massive tumors that occupy the entire pelvis and even the abdominal cavity. Until
now, no literature has been found that gives us information on ovarian pathology during the course of the pandemic that we are
now experiencing; reason for which this clinical case is presented.
Objective: Describe the adnexal pathology associated with covid-19 infection.
Design: Prospective, observational in a single center.
Methodology: This is a systematic review of adnexal pathology in a patient affected by the new coronavirus (Covid-19);
emphasizing its clinical characteristics and its short-term complications. The information and images obtained belong to the
medical staff in charge of the case, whose reinforcements are provided by the Excel, Word and JPG statistical package.
Carcinoma papilar intraquístico invasivo en mama de hombre de 91 años
Authors: Orante Ana , Gramajo Marisol
Published: April 2021

El carcinoma papilar intraquístico invasivo es una neoplasia rara vez diagnosticada en glándula mamaria masculina. El diagnóstico suele ser tardío y requiere de la resección completa de la lesión. Se presenta el caso de un hombre de 91 años con tumoración en glándula mamaria derecha de tres años de evolución.
Eszközhasználatra utaló fogazati elváltozás Szalaszend–Nagy- és Kishegy honfoglalás kori (10. századi) temetőjéből
Authors: Mateovics-László Orsolya , Líbor Csilla
Published: April 2021

A Magyar Nemzeti Múzeum Régészeti és Örökségvédelmi Igazgatósága 2018 tavaszán kezdte meg az M30-as autópálya építéséhez kapcsolódó megelőző régészeti feltárásait. A Szalaszend–Nagy- és Kis¬hegy nevű lelőhely egy bronzkori földvártól délre fekvő területen került elő, ahol a 10. századi anyagot csupán néhány temetkezés képviselte, mégis egy igen fontos régészeti és embertani információt hordozó leletegyüttest rejtett magában. Embertani szempontból a legjelentősebb sír az SNR 407. számú férfié volt, akinek a maradványai sajátos módon engedtek betekintést a 10. századi népesség életmódjába. Az itt meg¬figyelt fogzománc-elváltozások olyan foglalkozáshoz kapcsolódó tevékenységhez köthetők, amelyhez mind¬két kézre szükség van, és egy szilárd, kemény tárgyat a fogak között kellett tartani, esetleg mozgatni.
Complex needs nursing team as a structural element of a multidisciplinary team in managing patients with diabetic foot syndrome
Authors:   South Ural State Medical University, Chelyabinsk, Pavlov Y. I. , Lapik S. V. ,   Tyumen State Medical University, Tyumen
Published: April 2021

Aim. To prove the efficiency of organizational model of nursing support for the activities of an interdisciplinary team (IDT) for the management of patients with diabetic foot syndrome (DFS) in outpatient medical care. Materials and methods. Modeling, questionnaire method, clinical observation and monitoring of 178 patients with DFS. Results. The developed organizational model of the complex needs nursing team has proven its effectiveness. It was based on the creation of a clearly functioning DFS on the principles of prevention of the development the purulent necrotic complications in the risk group. The complex needs nursing team is a professional structure that can be monitored and recorded, adapted to solve the problems that appears in patients in need of long term nursing care. Conclusions. Analysis of the implementation results showed that the system of nursing patronage makes it possible to bring medical care closer to patients with DFS, provides early identification of persons with risk of developing an acute purulent-necrotic process or other complications of diabetes mellitus.