bluuebunny/crossref_metadata_2025 huggingface dataset:
Ação dos aditivos estabilizador de hidratação e incorporador de ar em pastas de cimento Portland
Authors: Antoniazzi Juliana Pippi , Mohamad Gihad , Casali Juliana Machado , Schmidt Raquel Petry Brondani , Trindade Bernardete
Published: July 2020

Resumo A argamassa estabilizada é uma mistura pronta que contém os aditivos incorporador de ar (AIA) e estabilizador de hidratação (AEH) em sua composição a fim de aumentar sua trabalhabilidade e o período de aplicação por até 72 h. O trabalho avaliou a ação desses aditivos em pastas de cimento Portland, empregados isoladamente e combinados, desprezando-se o efeito do agregado. No estado fresco foram determinadas viscosidade, densidade de massa, ar incorporado e tempo de pega. Foram avaliadas no estado endurecido capilaridade, densidade de massa e resistência mecânica. Os resultados demonstraram interferência e ação cruzada de efeitos entre os aditivos, demonstrando que o AEH também pode incorporar ar às pastas e que o AIA pode causar retardo no tempo de pega. A viscosidade demonstrou ter relação com a estabilidade das bolhas incorporadas, e não com o teor de ar. O AEH proporcionou maior fluxo de água por capilares, contrariamente ao AIA. A resistência mecânica das pastas com altos teores de AEH sofreu redução, indicando possível retardo na formação de compostos hidratados. Os teores intermediários de AEH demostraram ser mais adequados para misturas estabilizadas de cimento, podendo ser associados a teores mais elevados de AIA sem comprometer suas propriedades.
Propriedades mecânicas das argamassas estabilizadas: evolução com a idade e o grau de hidratação
Authors: Casali Juliana Machado , Mees Sabrina , Oliveira Alexandre Lima de , Betioli Andrea Murillo , Calçada Luciana Maltez
Published: July 2020

Resumo O objetivo deste estudo foi avaliar as propriedades do estado fresco e endurecido e o grau de hidratação das argamassas estabilizadas ao longo do tempo. As argamassas foram produzidas com a mesma relação água/materiais secos (13%) e teor de aditivo incorporador de ar (0,35% em relação à massa do cimento), com três teores de aditivo estabilizador de hidratação (0%, 0,4% e 0,8%). As argamassas foram caracterizadas no estado fresco em dois tempos de utilização (0 hora e 48 horas) pela: consistência, densidade de massa, teor de ar incorporado, retenção de água, tempo de pega e parâmetros reológicos. As propriedades do estado endurecido foram avaliadas aos 7, 14, 28, 42 e 56 dias: resistência à compressão e tração; densidade da massa aparente e módulo de elasticidade dinâmico. Também foi avaliado o grau de hidratação por três métodos: perda ao fogo, análise termogravimétrica e difração de raios X. Os resultados obtidos demostraram influência do teor de aditivo estabilizador nas propriedades avaliadas. O grau de hidratação foi influenciado pelo teor de aditivo estabilizador e pelo tempo de utilização. Porém, não foi possível correlacionar grau de hidratação com a resistência à compressão, sendo esta influenciada também por outros fatores.
Argamassa autonivelante com adição de resíduos de mármores e granitos: propriedades físicas e mecânicas
Authors: Mendes Gabriela Azambuja , Effting Carmeane , Schackow Adilson
Published: July 2020

Resumo Foram desenvolvidas misturas de argamassas autonivelantes para contrapiso com resíduos do corte de mármores e granitos (adição de 40% e 50% RCMG em relação à massa de cimento), e sem o resíduo, variando-se a quantidade de aditivo modificador de viscosidade e superplastificante, relação água/cimento e cimento/areia. Sequencialmente foram ensaiadas dosagens com fíler calcário em substituição ao RCMG, com adição de fibras de polipropileno, e foi estudado um produto comercializado. Propriedades nos estados fresco (espalhamento/flow, healing time, retenção de fluxo após 20min e 30min e tempo de pega) e endurecido (massa específica, absorção de água, índice de vazios, resistência à compressão e tração na flexão) foram ensaiadas conforme a ASTM 1708. A mistura otimizada com 50% RCMG, fator água/cimento de 0,55, proporção cimento/areia de 1:1,5 (em massa utilizando o cimento CPV-ARI) obteve resistência à compressão de 38,89 ± 2,10 MPa aos 28 dias, apresentando o melhor desempenho entre as argamassas testadas. A adição de material fino nas dosagens de argamassas autonivelantes contribuiu para o espalhamento do material e reduziu o problema de segregação. O RCMG quando empregado em misturas de argamassas autonivelantes permite diminuir os impactos ambientais pertinentes das atividades de exploração e beneficiamento de rochas ornamentais.
Análise espaço temporal da alteração do uso do solo sob influência de um polo gerador de viagens em Goiânia, GO, Brasil
Authors: Portis Gabriela Tobias , Santos Alex Mota dos , Nunes Fabrizia Gioppo
Published: July 2020

Resumo As análises da dinâmica de alteração nos padrões de uso e ocupação do solo, que são importantes no planejamento de áreas urbanas, podem ser realizadas de forma indireta por meio de imagens orbitais de sensoriamento remoto. As imagens orbitais têm se revelado importantes ferramentas para medir e monitorar as atividades humanas na Terra. Desse modo, este artigo tem como objetivo mapear as áreas de entorno do Passeio das Águas Shopping, situado na região norte de Goiânia, GO, atribuindo a ele a condição de polo gerador de viagens (PVG). Assim, foi avaliada a dinâmica de alteração de uso e cobertura do solo em seu entorno. A metodologia empregada teve como base o processamento digital de imagens orbitais em ambiente de sistema de informação geográfica (SIG). Os resultados revelaram que, em um intervalo de 10 anos, houve redução da área de vegetação e aumento significativo das áreas pavimentada e construída, a ponto de promover mudanças significativas no padrão de uso do solo após a implementação do PGV.
Evaluation method for building performance in Light Wood Frame in Brazil
Authors: Sotsek Nicolle Christine , Leitner Drielle Sanchez , Santos Bruno Lacerda , Messias Janilce dos Santos Negrão , Santos Adriana de Paula Lacerda
Published: July 2020

Abstract Light wood frame (LWF) is a construction system considered innovative in Latin American countries, which has been used as a strategy to mitigate housing deficits. Since this construction system is new in these countries, a rigorous assessment of their manufacturing, construction and use is essential. Thus, this research aims to develop a method to evaluate the performance of LWF buildings in Brazil to help builders optimise the construction system in the country. The study made use of the literature to identify valuable criteria for a building performance evaluation using qualitative tools, such as questionnaires and the Delphi technique, to select specific criteria for the LWF system. Finally, statistic tools, criteria groups and weights were generated. As a result, the study established a framework with 5 dimensions, 19 criteria and 41 sub-criteria, thus understanding which the most important criteria are to be evaluated during the LWF building performance evaluation. Finally, the criteria with the highest scores refer to structural durability, maintenance, sealing and control of thermal, acoustic, visual and air quality comfort.
Influência da utilização de diferentes teores de lama vermelha nas propriedades de ladrilhos hidráulicos
Authors: Romano Roberto Cesar de Oliveira , Bernardo Heitor Montefusco , Dantas Sérgio Roberto Andrade , Cincotto Maria Alba , Pileggi Rafael Giuliano
Published: July 2020

Resumo A redução do consumo de ligante em composições de concretos e argamassas juntamente com a utilização de materiais cimentícios suplementares (SCM) são alternativas que propiciam a redução do impacto ambiental no setor construtivo, o que possibilita a diminuição de custos e potencializa as características dos materiais cimentícios. A geração de lama vermelha (LV) pela indústria do alumínio, pelo processo Bayer, resulta em um passivo ambiental que muito tem a contribuir com esse propósito. Este estudo foi realizado com o objetivo de avaliar o impacto da utilização de diferentes teores de LV em associação com cimento Portland nas propriedades de ladrilhos hidráulicos. Foram avaliados os efeitos na cor, porosidade, absorção de água, resistência à abrasão e à flexão, e permeabilidade ao ar. Os resultados indicaram impacto significativo quanto à permeabilidade ao ar e à cor das peças, não sendo observados impactos estatisticamente significativos nas demais propriedades avaliadas.
Aplicação de metodologias de inspeção em ponte de concreto armado
Authors: Medeiros Alisson Gadelha de , Sá Maria das Vitórias Vieira Almeida de , Silva Filho José Neres da , Anjos Marcos Alyssandro Soares dos
Published: July 2020

Resumo Manifestações patológicas atingem obras civis em ambientes agressivos distintos. Com isso, ações por inspeções técnicas e eventuais intervenções são necessárias através do uso de metodologias específicas, que minimizem subjetividades nesse processo e garantam soluções adequadas quanto à durabilidade. Este artigo aplica metodologias de inspeção em uma ponte situada no nordeste brasileiro. Para tanto, foram identificadas manifestações patológicas e escolhidos elementos a serem avaliados no cálculo de deterioração da metodologia GDE (grau de deterioração de estruturas) adaptada e análise técnica da norma DNIT. O grau de deterioração global da estrutura obtido pela metodologia GDE foi de 64,03, que qualifica em “nível de deterioração alto”, e a nota técnica atribuída pela norma DNIT foi igual a 3, sendo considerada uma estrutura como “potencialmente problemática”. A experiência e qualificação técnica nessas avaliações são fatores imperativos. Entretanto, na metodologia GDE adaptada, a subjetividade da inspeção ficou reduzida com a existência de formulações matemáticas nas quais os elementos foram avaliados através das presentes manifestações patológicas por fatores de ponderação. Dessa forma, foi possível quantificar e classificar o estado de conservação da estrutura, indicar a necessidade de intervenção e obter comparação entre metodologias de inspeções em pontes, na garantia do refinamento de resultados e de reprodução em outras pesquisas.
Tempo de espera e duração da consulta médica na região metropolitana de Manaus, Brasil: estudo transversal de base populacional, 2015
Authors: Galvão Tais Freire , Tiguman Gustavo Magno Baldin , Costa Filho Douglas Borges da , Silva Marcus Tolentino
Published: July 2020

Objetivo. Analisar o tempo de espera e a duração de consulta médica na região metropolitana de Manaus, Brasil. Métodos. Estudo transversal, realizado com adultos residentes na região em 2015. O tempo de espera para consulta e a duração da consulta, em minutos, foram referidos pelos participantes. A análise foi realizada por regressão de Tobit e ponderada pelo desenho amostral. Resultados. Foram entrevistados 4.001 indivíduos. O tempo médio de espera foi de 125,4 minutos (IC95%120,2;130,5), enquanto a consulta durou, em média, 52,5 minutos (IC95%48,0;57,0). Mulheres, pessoas pobres, pessoas com baixa escolaridade, indígenas, residentes em municípios do interior, sem seguro de saúde e atendidos por ginecologistas esperaram mais pela consulta (p<0,05). O tempo de consulta foi menor em pessoas não brancas, com estado de saúde ruim e com plano de saúde (p<0,05). Conclusão. A consulta médica durou, em média, metade do tempo de espera. Observaram-se iniquidades sociais nesses períodos de tempo.
POLÍTICA EXTERNA E DIPLOMACIA DA SAÚDE GLOBAL EM TEMPOS DE PANDEMIA: O BRASIL NA CONTRAMÃO DA HISTÓRIA
Authors: Alvarenga Alexandre Andrade , Rocha Erika Maria Sampaio , Filippon Jonathan , Andrade Maria Angelica Carvalho
Published: July 2020

O artigo analisa a atuação internacional do Brasil durante uma pandemia por novo coronavírus, considerando o papel estratégico da política externa, uma tradição diplomática brasileira nos fóruns multilaterais e na área da saúde global. Analise como a política externa brasileira está respondendo aos principais desafios domésticos e internacionais relacionados ao combate à pandemia e quais são os resultados práticos dessa atuação. Parte-se da hipótese de que o Brasil está atuando abaixo das exigências e das habilidades e tradição diplomática do país. Conclui que, para além do efeito prejudicial no cenário de governança global da saúde, para negar uma ciência por meio de ações e políticas sistemáticas, o governo brasileiro é responsável por exportar uma população a mortes evitáveis.
DARPA's Role in Machine Learning
Authors: Alspector Joshua , Dietterich Thomas G.
Published: July 2020

Machine learning methods provide a way for artificial intelligence systems to learn from experience. This article describes four threads of machine learning research supported and guided by the Defense Advanced Research Projects Agency — probabilistic modeling for speech recognition, probabilistic relational models, the integration of multiple machine learning approaches into a task‐specific system, and neural network technology. These threads illustrate the Defense Advanced Research Projects Agency way of creating timely advances in a field.
Vision and Robotics
Authors: Strat Thomas M. , Chellappa Rama , Patel Vishal M.
Published: July 2020

Vision and robotics has the well‐defined goal of meeting or exceeding human‐level capabilities in perception, locomotion, and manipulation. Not surprisingly, that is perhaps easier said than done. Beginning in the 1970s, the Defense Advanced Research Projects Agency started the ambitious Imaging Understanding program that would continue for more than 20 years. The Imaging Understanding program began with fundamental research and slowly evolved into a host of more applied efforts with specific systems goals. Robotics programs followed a similar arc as the early research‐oriented programs generated capabilities from which practical systems could be built. A culmination of the vision and robotics research was the Defense Advanced Research Projects Agency Grand Challenge, which turned the impossibility of a self‐driving car into an imminent reality. This article tells the story of how some of the modern‐day technologies we enjoy today trace their evolution from research sponsored by the Defense Advanced Research Projects Agency over the last 40 years.
Estimating the full range of thermal conductivity dryout curve
Authors: Yildiz A.
Published: July 2020

The efficiency of shallow ground heat exchangers is controlled by the thermal conductivity of the soil they are placed in, which is predominantly a function of soil type, mineralogy, density and water content. As such systems are placed at shallow depths where hydrological regime is highly fluctuant due to rainfall and evaporation, it is important to have soil-specific information on how thermal conductivity changes with water content. There are numerous models available in the literature, most of which are not able to define the full range of the thermal conductivity dryout curve (TCDC) with a single equation. This study suggests a modified sigmoid curve to define the TCDC, and introduces yet another statistical model to estimate the fitting parameters of the equation. Validation using data from the literature shows that the model is capable of producing the full range of TCDC for soils with 90% and less sand content.
Increasing efficiency of rail steel refining in CCM tundish based on rational organization of hydrodynamic processes
Authors: Protopopov E. V. , Chislavlev V. V. , Temlyantsev M. V. , Golovatenko A. V.
Published: July 2020

Quality and operational properties of rails determine duration of their operational service. The main parameters that determine quality of steel are chemical heterogeneity and presence of non-metallic inclusions in metal. Efficiency of homogenization of metal melt and its refining from non-metallic inclusions in tundish is largely determined by organization of hydrodynamic processes, internal geometry of ladle, and presence of additional refractory elements. Using physical and mathematical modeling, study of the influence of additional refractory elements of various configurations of intermediate ladle on processes of melt flow was carried out. Physical modeling of hydrodynamic processes in the tundish taking into account requirements of similarity theory was made on specially created laboratory-experimental complex. Numerical experiments were carried out using computational fluid dynamics methods (finite volumes) on three-dimensional turbulent mathematical model with a singlephase representation of metal melt flow in tundish. To evaluate efficiency of melt homogenization according to results of physical and mathematical modeling, new technique has been developed based on analysis of distribution of time of liquid placement in continuous flow reactor. According to the results of experiments, configuration of the internal volume of tundish of four-strand CCM is proposed. A construction is considered that provides effective homogenization of molten rail steel and its refining from non-metallic inclusions. The design of full-profile compartments was developed and tested under industrial conditions, which ensure rational organization of melt flows, its homogenization and efficient refining of rail steel from non-metallic inclusions in the tundish. Industrial research was carried out under the conditions of four-strand CCM No. 1 of EAF shop at JSC “EVRAZ ZSMK”.
Influence of pulse-plasma modification of VK10KS solid alloy surface by titanium and boron on its structure and properties
Authors: Oskolkova T. N. , Simachev A. S.
Published: July 2020

Modification of the surface of VK10KS solid alloy with titanium alongside with boron by the method of pulse-plasma exposure (electro-explosive alloying) is considered. In this case, a superhard (27,500 MPa nanohardness) layer is formed with a thickness of 2.0 – 2.5 μm and a low (μ = 0.10) friction coefficient compared to the friction coefficient of a hard alloy in the sintered state (μ = 0.41). This layer consists of finely dispersed high-hard phases TiB2, (Ti, W)C, W2C (according to scanning, transmission electron microscopy and X-ray phase analysis). Below is a hardened (with a nanohardness of 17,000 MPa) surface layer (heat affected zone) 10 – 15 μm thick, identified by W2C and WC carbides and alloyed with a cobalt binder. This layer smoothly passes into the base. By profilometric studies it was established that after electroexplosive alloying with titanium and boron, the roughness increases (Ra = 2.00 μm) compared to the initial one (Ra = 1.32 μm), but remains within the specifications (Ra = 2.50 μm). The authors have revealed changes that occur in the surface carbide and near-surface cobalt phases during electroexplosive alloying. In the carbide phase, accumulations of dislocations were indicated. In the cobalt binder, deformation bands (slip bands), single dislocations, and also finely dispersed tungsten carbide precipitates were found. This change can be explained by stabilization of the cubic modification of cobalt, the crystal lattice of which has a large number of slip planes during deformation and a greater ability to harden compared to the hexagonal modification of cobalt. Additional alloying with a cobalt binder will positively affect the operational stability of tungsten carbide alloys as a whole due to their stabilization.
Analysis of the use of rare earth metals in ferrous metallurgy of Russia and world
Authors: Volkov A. I. , Stulov P. E. , Leont’ev L. I. , Uglov V. A.
Published: July 2020

The analysis of the current state of production of rare earth metals (REM) in Russia and in the world was made. Information about REM production in different countries of the world and about new foreign projects for REM production and processing is provided. The article presents the balance of production, export and import of raw materials and products with REM, including scandium and yttrium, in Russia. The maximum volume of REM consumption in Russia was calculated taking into account imported products with REM. This data was compared with other countries, including the former USSR. Much attention is paid to the use of REM in metallurgy. Data on the influence of REM on the properties of cast iron and steel are presented. Information is given about the forms of REM used for their use in the Russian ferrous metallurgy. We have studied the structure of REM consumption in ferrous and non-ferrous metallurgy. On the example of two enterprises (one of them specializes in mass production, and the second – on production of special steels), the structure of REM consumption for steel alloying was studied by type and scope of its application. The development peculiarities of REM consumption in Russian ferrous metallurgy were investigated. The volume of consumption was calculated; data on imports of raw materials with REM for metallurgy and the producers of ferroalloys with REM in Russia is given. We have analyzed the spectrum of steel products with REM. A comparison of the consumption of REM in the metallurgy of Russia and foreign countries is presented. The reasons for insufficient consumption of REM in the Russian metallurgy are considered, an assessment is given on the change in production volumes of certain types of steel and cast iron, and recommendations are made on the growth of REM consumption in metallurgy.
Structure and hardness of wear-resistant coatings with low-frequency current modulation deposited on low carbon steel
Authors: Saraev Yu. N. , Bezborodov V. P. , Perovskaya M. V. , Semenchuk V. M.
Published: July 2020

Influence of the modes of manual electric arc surfacing of coatings with T-590 electrodes on low-alloy steel 09G2S on their structure and hardness was investigated. It is shown that the pulsed arc surfacing of coatings by electrodes forms a fine-dendritic structure of the deposited metal. Microstructure of the heat-affected zone after surfacing consists of several sections: the overheating zone with a widmanstett structure and the normalization zone with a characteristic fine-grained ferrite-perlite structure. In the initial state, the base metal (steel 09G2S) has a hardness of ~2500 MPa. The hardness of the deposited coating material due to strong mixing with the steel metal is ~ 2700 – 3000 MPa, and of thermal impact zone: 2100 – 2300 MPa. When applying the coating on DC mode, heating temperature of the surfacing bath is higher; this, as a consequence, causes grain growth. When coating on pulse modes, a structure with smaller component sizes is formed by directed low-frequency high-energy impact of the electric arc on the formed metal and due to the constant reciprocating motion of the melt with the frequency of current modulation. It was established that the application of the pulse-arc surfacing method allows preserving the previously formed hardening phases in the deposited coatings.
Development trends of iron and steel industry in Russia
Authors: Kostyukhin Yu. Yu. , Savon D. Yu.
Published: July 2020

The article presents detailed analysis of iron and steel industrial production, assessment of the present state of labour costs in metallurgical companies with increase in production, and revealing the reserves emerging under the influence of expected and unexpected factors of the metallurgy consumer market. The authors assume that in the current circumstances it becomes especially significant to strengthen the position of a low-cost manufacturer in the world metallurgical industry by means of rapid introduction of best world’s practices and best available technologies, highly effective IT-based investment projects.
Innovative development of the regions and multiplier-based performance impact assessment of local resources
Authors: Bayzakov S. B. , Uandykova M. K.
Published: July 2020

One of the most important tasks of innovative development of a country and its regions is building an innovative vector of development essential for reaching a competitive level and economic growth. The authors have explored tasks and issues and tasks connected with quantitative explanation of still unresolved dependence of export-oriented countries’ economic growth on export volumes and prices in the foreign market. They used a three- way model of innovative development to study the productivity of resources in different areas of development.

As a result of their research the authors introduced a different approach to the notion of innovative development. It allows researchers to view it as a system and integrity in three co-related directions: technique and technology, currency and finance, and society and politics. Thus, they have the opportunity to estimate how much each sector of national (regional) economy individually and all of them together contribute to the economic growth. This approach provides the opportunity to examine the basic holistically co-related directions which allow measuring the level of innovative development, estimating the economy’s innovativeness, determining and viewing differently the innovative paradigm. The authors used mathematical model to study and introduce productivities of major types of resources. They point out that effective functioning of economy (including financial) makes it possible to develop industries gradually and to smooth out economic development of the regions, to avoid structural shifts and disproportions in economy which finally results in the possibility of productive implementation of programs of the country’s innovative development.

The authors have systematically studied the correlation between the productivity of resources and the achievement of systematic multiplier effect (there is no wide research found on this problem, the authors dealt with individual indicators of multiplier effect)
Peculiarities of competitive behaviour of successful businesses in digital economy
Authors: Filosofova T. G. , Surkova Yu. A.
Published: July 2020

The contemporary world market abounds in companies varying in their competitive behaviour which represents their objectives and specific activity. The article shows that among various types of economic activity connected with digitalization as the most important trend of economic development a special place belongs to high technology, and market conditions are determined by businesses which make use of such technologies. As a rule, these businesses have the best performance and take top positions of the ratings based on a wide range of parameters. The authors assume that use of artificial intelligence gradually becomes a significant factor determining a company’s success at the world market. They have also found out that market entities show the tendency to use different platforms in their business activities more frequently. Major market players take interest in external innovation purchasing it at the market or interacting with other companies and even competitors. They also are interested in processing and analyzing big data and internet of things (IoT). The authors point out that demand for business incubators tends to grow as well. They have analyzed the inner changes at different stages of development of Google and the corresponding changes of competitive behaviour pattern at the corresponding markets and defined major factors which influence stable position of the company at the market. Intellectualization of economic activity of business can be considered as ambivalent: on the one hand, companies’ more frequent exploration of digital economics becomes an essential part of their successful competitive behaviour at the market, and on the other hand it appears to be the factor which effects the development of exterritorial buseness environment connected with the world processes and formation of geoeconomic space.
Employees’ process and risk-oriented thinking
Authors: Soloviev V. P. , Pereskokova T. A.
Published: July 2020

The authors of the article explore the problem of introducing process and risk-oriented thinking in national organizations. In 2000 the International Organization for Standartization, ISO, announced process approach as the basis principle of management in any organization. It became the embodiment of Deming’s postulate who recommended to consider any activity as a technological process. The authors show the practicability of transition from the functional structure of an organization to integrated process. New ISO 9000:2015 standards reflect presentday challenges and require that organizations should carry out risk assessment and accounting. One of the key objectives of the quality management system is to act as the prevention tool. Preventive action lies in using riskoriented thinking in formulating requirements to the quality management system. The authors introduce the system analysis method in risk management to reveal potential risks and plan preventive action.
Cyriax syndrome in a young male professional soccer player: A case report
Authors: Tsobgny Panka Chrislain , Tchebegna Patrick Yvan
Published: July 2020

Cyriax syndrome is a neglected cause of lower chest or upper abdominal pain. The pain is due to an irritation of the intercostal nerves by the incomplete dislocation of the costal cartilage of the ribs. This study presents a rare case of a young male soccer player with cyriax syndrome and offers medical insight into the clinical diagnosis and one therapeutic modality of this condition. He came to the sports clinic reporting severe pain in the right lower rib cage near the costal cartilage junction which he has experienced for about three weeks. A chest x-ray detected nothing. After the failure of initial conservative measures, persistence of the pain led authors to initiate two separate local infiltrations using 1% lidocaine ten days apart. This resulted in a gradual decrease in pain. Cyriax syndrome is an unrecognised pathology, thus it is important for team physicians to consider this diagnosis when assessing athletes with persistent chest pain.
Association of polymorphisms in TP53 and the promoter region of IL10 with gastric cancer in a Kazakh population
Authors: Kulmambetova Gulmira , Shtefanov Ivan , Aitkulova Akbota , Imanbekova Meruyert , Iskakova Aisha , Makishev Abay , Ramankulov Yerlan
Published: July 2020

The emerging evidence indicates that single nucleotide polymorphisms (SNPs) of the TNF, IL10, TP53, and CD14 genes may determine individual susceptibility to gastric cancer. We aimed to investigate the associations for polymorphisms of the TNF, IL10, TP53, and CD14 genes in a population of Kazakhs, to identify potential risk or protective associations of the SNPs with gastric cancer. A case group of 143 patients hospitalized for gastric cancer was enrolled. Controls were 355 volunteers with no history of any cancer and frequency matched with cases by age. Differences in proportions for categorical variables and the assessment of genotypic frequencies conforming to the Hardy–Weinberg equilibrium law were evaluated by the chi-square test. Associations between genetic polymorphisms and the risk of gastric cancer were estimated by regression analysis. For genetic analysis, three genetic models (additive, dominant, and recessive) were used. Four significant associations were found. The SNPs rs1042522 of TP53 and rs1800896 of IL10 were risk factors for gastric cancer by the additive model. Two polymorphisms of IL10 were protective of gastric cancer, namely, rs1800872 by additive model and rs1800871 by recessive model. No signiﬁcant associations were observed between TNF and CD14 polymorphisms and gastric cancer. The polymorphisms TP53 rs1042522 and IL10 rs1800896 are associated with gastric cancer risk, while the polymorphisms IL10 rs1800872 and rs1800871 are protective of gastric cancer in the population of Kazakhs.
COVID-19 Pandemi Döneminde Türkiye’deki Üniversitelerin Uzaktan Eğitim Sistemlerinin İncelenmesi
Authors: DURAK Gürhan , ÇANKAYA Serkan , İZMİRLİ Serkan
Published: July 2020

Bu araştırmanın amacı, Covid-19 pandemisi döneminde Türkiye’deki üniversitelerin acil uzaktan eğitime geçişte yaptıkları çalışmaları incelemektir. Araştırmada tarama modeli kullanılmıştır. Araştırma evrenini Türkiye’deki tüm üniversiteler (208 üniversite) oluşturmaktadır. Her bir üniversite ile ilgili veriler üniversitelerin acil uzaktan eğitim sürecinde görevli kişilerden (UZEM’de ve Bilgi İşlem Dairesi’ndeki görevliler vb.) edinilmiştir. Araştırmada tüm evrene erişilmeye çalışılmış ancak 33 katılımcıya (üniversiteye) ulaşılabilmiştir. Araştırmanın verileri bir çevrimiçi anket formu (Google Form) ile toplanmıştır. Araştırmadan elde edilen bulgulara göre en çok kullanılan öğrenme yönetim sistemleri Moodle ve ALMS’dir. Üniversiteler tarafından en çok kullanılan canlı ders yazılımlarının Big Blue Button ve Perculus olduğu görülmüştür. YÖK’ün derslerin senkron işlenmesini tavsiye etmesine rağmen tüm derslerini senkron olarak yürütebilen üniversite sayısı sadece 6’dır. Üniversitelerin çoğu daha önce kurulu olan öğrenme yönetim sistemi (f=29) ve canlı ders yazılımı (f=24) üzerinden süreçleri yönetmeye çalışmışlardır. Üniversitelerin yaklaşık yarısı öğrencilerin ders devam takibini yapmıştır. Katılımcılar, uzaktan eğitime hazırlık sürecinde öğretim elemanlarının eğitimini en çok zorlandıkları durum olarak belirtmişlerdir.
Üniversite Öğrencilerinin Gelecekleriyle İlgili Kaygı ve Beklentilerinin Belirlenmesi
Authors: ZENGİN Burhanettin , ŞENGEL Ümit
Published: July 2020

Dünyada yaşanan önemli değişimlerin meydana getirdiği belirsizlikler başta genç nüfus olmak üzere çoğu insanın geleceğe yönelik kaygı ve beklenti düzeylerini etkileyebilmektedir. Bu bağlamda araştırmada Türkiye’de turizm eğitimi alan öğrencilerin kaygı ve beklenti düzeylerinin belirlenmesi ve kaygı ve beklenti düzeylerini etkileyen faktörlerin ortaya konması amaçlanmaktadır. Araştırmada nicel araştırma yöntemlerinden yararlanılmış ve veri toplama aracı olarak anket tekniği kullanmıştır. Türkiye’de kamu ve vakıf üniversitelerinde öğrenim gören toplam 2.578 öğrenciden veriler elde edilmiştir. Çalışmanın sonuçlarına göre üç beklenti, bir kaygı boyutu oluşmuştur. Bu boyutlar öğrencilerin bazı betimleyici değişkenlerine göre anlamlı farklılıklar göstermiştir. Aile yapısı, terör ve eğitimin niteliği Türkiye’deki üniversite öğrencilerinin kaygı ve beklenti düzeylerini etkileyen en önemli üç faktördür. Bununla birlikte, öğrencilerin kaygı ve beklentileri arasında anlamlı bir korelasyon da tespit dilmiştir.
Ortalama Evlilik Yaşının Yükselmesini Etkileyen Faktörler ve Cinsiyete Göre Farklılıklar
Authors: ERALP Anıl , GÖKMEN Şahika
Published: July 2020

Son yıllarda sosyal hayatta yaşanan dönüşüm ve bireyselleşme ile Türkiye’de ortalama ilk evlilik yaşının yükseldiği görülmektedir. Bireylerin evliliği ertelemesi, toplumun temel yapıtaşı olan aile kurumunun devamının sağlanması işlevini sarsmaktadır. Bu çalışmada Türkiye’de evliliği erteleme ya da geç evlenme sorunu olarak adlandırılan bireylerin evlenme yaşını öteleyen faktörlerin etkisi ve cinsiyet bakımından farklılığı, yaşam analizi ile incelenmiştir. Bu çerçevede TÜİK AYA 2016 verileri içerisinde yer alan temel sosyo-ekonomik ve evlilik karar ölçeklerinden yararlanılmış olup, ortalama evlilik yaşının yükselmesinde etkisi olan faktörler Cox regresyon modeli üzerinden araştırılmıştır. Çalışmada elde edilen bulgular literatürdeki diğer çalışmalarla uyumlu olup, özellikle kadınların bireyselleşmeye daha eğilimli olduğu ve dolayısıyla bunun evliliği erteleme üzerinde olumsuz etkileri olduğunu işaret ettiği söylenebilir. Buna karşılık erkeklerin tutumlu ve az çalışma saati olan eş ile ve kadınların ise cömert ve kendini eşin ailesine ezdirmeyen eş adayı ile karşılaşmış olmaları bireylerin evliliği erteleme riskini düşürdüğü görülmüştür. Bu aynı zamanda, Türkiye’deki geleneksel aile yapısının korunduğunun bir göstergesi olarak yorumlanabilir.
Evaluation of Clinical Outcomes of Veneers Made at Kurdistan Board of Restorative Dentistry/ Sulaymaniyah Center; A Retrospective Study
Authors: Raof Pinar , Alzahawi Abdulsalam
Published: July 2020

Objective: To evaluate veneers made at Kurdistan board of restorative dentistry/ Sulaymaniyah center, regarding their mechanical (debonding, marginal adaptation, and fracture of restorations), biological (gingival index, gingival recession, postoperative sensitivity, and secondary caries), and esthetical (color matching, with marginal discoloration) qualities.          

Methods: One hundred and ten units of veneers applied to 15 patients were selected and evaluated according to clinical evaluation parameters from modified United States public health service criteria (USPHS) and FDI criteria. After signing informed consent, each patient was recalled and had the mechanical, biological, and esthetic aspects of their veneers clinically examined by the dental mirror, sharp explorer, periodontal probe, and visual inspection.

Results: Overall, the veneers made at the Kurdistan board of restorative dentistry/ Sulaymaniyah center were considered to be successful restorations with a high survival rate (97.2%) as only three veneers were found to have failed. And most of the patients, n= 94 (85.4%), were very satisfied with the color of their restorations. A total of 45 units of veneers (40.9%) were found to have mild gingivitis, while 14 units of veneers (12.7%) were found to have postoperative sensitivity. Only seven units of veneers (6.3%) were found to have secondary caries. 

Conclusions: Veneers made and fitted in the Kurdistan board of restorative dentistry/ Sulaymaniyah center were found to have an acceptable prognosis and longevity regarding their success rate and patient satisfaction.
Korespondencija Emanuela Vidovića
Authors: Bulimbašić Sandi
Published: July 2020

U tekstu se na temelju arhivskih izvora, ponajprije korespondencije
Emanuela Vidovića, odnosno pisama koje je u razdoblju od 1903. do
1916. pisao književnom kritičaru don Anti Petraviću i kiparu Ivanu
Meštroviću, pobliže rasvjetljava Vidovićeva uloga i svestrani doprinos organizaciji umjetničkog života u Splitu početkom 20. stoljeća.
Pisma otkrivaju i nepoznate detalje o Vidovićevim razmišljanjima o
izložbama, umjetnosti i vlastitom umjetničkom stvaralaštvu.
Izložba Sto listova jugoslovenske moderne grafike Komisije za kulturne veze sa inostranstvom i njezina uloga u razvijanju kulturnih veza Jugoslavije s inozemstvom u prvoj polovini 1950-ih
Authors: Magaš Bilandžić Lovorka
Published: July 2020

U članku se na primjeru zbirke/izložbe Komisije za kulturne veze sa inostranstvom Sto listova jugoslovenske moderne grafike razmatra način na koji su putujuće izložbe u prvoj polovini 1950-ih korištene kao poligon za uspostavljanje i jačanje međudržavničkih i kulturnih veza Federativne Narodne Republike Jugoslavije. Izložba Sto listova jugoslovenske moderne grafike u dvije je istovjetne verzije i pod različitim nazivima od 1953. do 1956. godine simultano gostovala diljem Južne Amerike i Europe (Grčka, Njemačka, Poljska). Na temelju arhivske, bibliotečne i periodičke građe analizira se djelovanje Komisije za kulturne veze sa inostranstvom, svrha, sadržaj i važnost formirane zbirke suvremene jugoslavenske grafike te propagandni karakter i recepcija izložbe u domaćem i inozemnom kontekstu.
The effect of ultrasound on the treatment of domestic wastewater from organic and biological contamination
Authors: Vashkurak Uliana , Shevchuk Liliya , Aftanaziv Ivan , Romaniv Anna
Published: July 2020

The effectiveness of the uses of ultrasonic cavitation for wastewater treatment has been investigated. The influence of the gases of different nature (nitrogen, oxygen, air, mixture of nitrogen and oxygen gases in the ratio of 1:1) on the destruction of organic and biological contaminants has been carried out. It is confirmed that ultrasound cavitation increases the purification effect of gases. It is established that the deepest purification from organic contaminants was achieved by the common action of air with ultrasound, the degree of water purification from organic compounds being 80% and from biological contaminants – by the common action of nitrogen with ultrasound – the degree of water purification from biological compounds being 99,5%. The effective rate constant was calculated.
Structures and properties of three new homobinuclear nanosized supramolecular copper coordination polymers derived from carboxylate type ligands and benzimidazole
Authors: Mukred Rasel , Osman Mohammed Samir
Published: July 2020

Three new homobinuclear nanosized supramolecular copper coordination polymers are hydrothermally synthesized by self-assembly reaction of L-tyrosine (Tyr), terephthalic acid (H2bdc), pyromellitic acid (H4btec) and benzimidazole (Hbzim) with copper chloride salt to generate with formula [[Cu2(tyr)2(bzim)2(Cl)2(H2O)2]]n 1, [[Cu2(bdc)2(bzim)2(H2O)6].3H2O]n 2 and [Cu2(H2btec)(bzim)(H2O)6].2H2O]n 3, which have been investigated by elemental analysis, molar conductivity and magnetic measurements, FT-IR and UV-Vis spectroscopy, (TGA/DTA) thermal analysis and X-ray powder diffraction(XRPD) analysis as well as MM2 theoretical calculations. The magnetic moment and electronic spectra of the complexes are certainly indicating the octahedral geometries. Thermal analysis of the complexes confirms the suggested structures and thermal stability. The results of the XRPD analysis and the average nanosized values of the complexes have nanosized supramolecular polymers in the triclinic system. The MM2 theoretical calculations are supported by the proposed structures.
Components of Event-Related Potentials in studies of perceptual learning
Authors: Kleeva D.F. , Rebreikina A.B. , Sysoeva O.V.
Published: July 2020

Perceptual learning is defined by increased effectiveness of completing perceptual tasks as a result of experience or training. This review presents the analysis of changes in the components of event-related potentials (ERPs) after visual and auditory perceptual learning in humans. The use of the EEG method, which has a high temporal resolution, makes it possible to trace the spatio-temporal dynamics of changes in the functioning of the brain during learning, which remains hidden in behavioral experimental studies. A review of neurophysiological studies indicates that perceptual learning induces changes across all levels of cortical hierarchy, starting with the early sensory components of ERPs (C1) and ending with the later integrative components (N170, MMN, P2). We also analyzed the short-term and long-term effects of learning. The reviewed neurophysiological data can serve as the basis for the development of new approaches of effective learning, as well as for the objective evaluation of existing methodics by assessing neuronal dynamics at different stages of stimuli processing.
Can learning new words in auditory modality lead to rapid cortical plasticity in adults
Authors: Razorenova A.M. , Tyulenev N.B. , Rytikova A.M. , Chernyshev B.V. , Skavronskaya V.V.
Published: July 2020

A stable relation between words and referent objects or events underlies human language. One of the most fundamental questions is how brain processes new words in order to form new lexical items. The answer to such questions will bring significant breakthrough in multiple fields, ranging from methods of language teaching and speech correction programs for children with late development to clinical rehabilitation of patients with speech impairments and neurophysiological functional tests of language network. This review presents the current state of Russian and foreign studies dedicated to new words learning in auditory modality. We tried to consider all varieties of techniques and paradigms in the field. Equal attention is paid both to studies of the phonological processing of a word (recognition of a phonetic pattern), and to works which consider the ways in which word acquire semantics. We discuss experiments carried out with an aid of such neuroimaging methods as fMRI, EEG / MEG, etc.
Brain activity during moral judgement of action
Authors: Arutyunova K.R. , Sozinova I.M. , Alexandrov Y.I.
Published: July 2020

Interdisciplinary studies of cognitive and neurophysiological mechanisms of moral judgement often combine tools borrowed from philosophy, psychology and neuroscience. In this work, we review the studies of brain activity during moral judgement at different stages of individual development. Generally, it has been shown that moral judgement is accompanied by activations in brain areas related to emotion and social cognition; and these activations may vary across individuals of different age groups. We discuss these data from the positions of the system-evolutionary theory and compare our view with the domain-general approach to cognitive processes and brain activity underlying moral judgement. We suggest that moral judgement, as part of individual behaviour, is supported by activity of functional systems formed at different stages of individual development; therefore brain activity during moral judgement is accounted for by the specificity of distribution of neural elements of functional systems across the brain structures, which is determined by the history of an individual’s interactions with the environment.
The Impact of the Training Mode on Students” Performance
Authors: Adaskina A.A. , Meluhina N.A.
Published: July 2020

The article presents the results of a study of the influence of the training regime on the subjective characteristics of working capacity (well-being, activity, mood), as well as on the number of absenteeism classes during the school year by students in grades 5–6. Currently, two training modes are used in the Russian Federation: traditional (4 quarters separated by autumn, winter and spring breaks) and modular (consisting of 6 intervals of 5-6 weeks separated by weekly breaks). The study involved students of grades 5-6 (152 students), parents (128 people) and teachers (25 people). The study was conducted using a specially designed questionnaire, which includes three blocks. An analysis of the attendance of students in two Moscow schools was conducted. In the course of the study, the following results were obtained: in the modular mode of instruction, by the end of the school year, students feel more active and are in a good mood. In the traditional mode of instruction, students feel more tired by the end of the school year. Signs of fatigue are observed. Statistically significant differences were obtained when analyzing the responses of students and teachers. In the traditional mode of training, the number of missed classes and the number of frequently ill children is significantly higher than in the modular mode. The modular mode, based on a uniformly distributed load, according to subjective assessments of students in grades 5-6, teachers and parents is more preferable to maintain performance.
Psychological and Pedagogical Technologies of Working with Teenagers to Level the Manifestations of Learned Helplessness
Authors: Shalaginova K.S. , Dekina E.V. , Kulikova T.I.
Published: July 2020

The article discusses the prerequisites for the emergence of learned helplessness in adolescents, offers psychological and pedagogical technologies for its study and prevention. Diagnostic and preventive programs are based on the selected components of learned helplessness: motivational, cognitive, and emotional. The article presents the materials of an empirical study obtained on a sample of teenagers in grades 5-6 in the number of 66 students who had a state of learned helplessness. The criteria and indicators for assigning children to a risk group based on the state of learned helplessness were marker words in the speech of a schoolchild. We used the author's questionnaire, the questionnaire “Motivation for success and fear of failure” by A.A. Rean, “Method of research of self-esteem and the level of claims” by Dembo-Rubinstein, the projective test “Nonexistent animal”, “Phillips school anxiety Test”, “Maddy's resilience Test” (adaptation by D.A. Leontiev), “Torrence creativity Test”. The study revealed the characteristics of adolescents with the phenomenon of “learned helplessness”. To overcome the conditions of learned helplessness in this category of students, the “Path to Success” program was developed and tested, recommendations were made to teachers on leveling the manifestations of learned helplessness in adolescents. To prevent and overcome the syndrome of learned helplessness, create emotional well-being of adolescents as targets of psychological influence, the formation of adequate self-esteem and the level of claims of adolescents, the development of an objective, adequate attitude to the results of their activities, orientation not to error, but to obtain new knowledge are identified.