bluuebunny/crossref_metadata_2025 huggingface dataset:
Effects of Separate and Combined Chronic Ingestion of Codeine and Tramadol on Feeding Behaviour of Female Albino Rats.
Authors: Balogun S.K. , Osuh J.I. , Onibokun O.O.
Published: July 2020

Tramadol and codeine are both opioids used for pain control and management but are prone to misuse and abuse despite the various side effects. This study, therefore, examined the effects of chronic exposure to Codeine and Tramadol on feeding behaviour. Twenty-Four (24) Female Albino Rats weighing between 150-200g and 4-6 weeks old, were used. They were divided into 4 experimental groups of Codeine, Tramadol, combined Codeine and Tramadol and Control groups with 6 rats in each group and exposed to 8mg/kg of codeine, 20mg/kg of tramadol, combined 8mg/kg of codeine and 20mg/kg of tramadol, and normal saline for 28 days. Records of the amount of food ingested and the bodyweight of the rats were taken daily for the duration of the experiment. Randomized block ANOVA showed a significant effect of Codeine and Tramadol on feeding behavior (F (3,641) = 25.53, p < 0.001, η2= .11), and body weight (F (3,641) = 76.67, p < 0.001, η2= .26), among the female rats. Female rats in the combined codeine and tramadol group ingested less food (x ̅=33.45), compared to codeine group alone (x ̅=40.71), tramadol group alone (x ̅=39.96) and control group (x ̅=49.38).  Female rats in the combined codeine and tramadol group gained less weight (x ̅=132.67), compared to codeine group alone (x ̅=137.67), tramadol group alone (x ̅=133.33), and control group (x ̅=164.25). The mean differences were significant (p<.001). It was concluded that chronic exposure to tramadol and codeine has effects on feeding behaviour and subsequent body weight.
Biomarkers in predicting cardiovascular risk: new prospects of troponin I
Authors: Kontsevaya A. V. , Myrzamatova A. О. , Drapkina O. M.
Published: July 2020

Risk stratification is an important aspect of effective control of cardiovascular diseases. Risk scores based on conventional risk factors did not solve the stratification problem completely due to a number of factors. One way to increase the accuracy of predicting cardiovascular risk may be to supplement conventional scores with cardiovascular biomarkers. Cardiac troponins are the most reliable cardiovascular biomarkers in the diagnosis of acute myocardial infarction. However, recent studies have shown that they have the potential to use as an addition to cardiovascular risk stratification scores. Cardiac troponins meet the requirements for new biomarkers: cardiospecificity, prognostic value, change in levels in response to risk reduction actions, evidence value, economic efficiency. A large number of population studies demonstrate the association of elevated levels of cardiac troponin I with adverse cardiovascular events. To assess the prospects of supplementing conventional risk scores with new biomarkers, including troponin I, the study of the role of biomarkers in cardiovascular risk prediction in men and women of working age is started in Russia.
Features of the adaptation of foreign students to the process studying at a Russian university
Authors: Vishnevskaya Marina
Published: July 2020

This article is devoted to the study of the peculiarities of adaptation of foreign students to the learning process in Russian universities. Adaptation of students to the University is considered as a process of their adaptation to the conditions of the University, to new methods and forms of education, to the norms of the student body and to future professional activities. Foreign students are representatives of different cultures and, in this regard, may differ greatly from Russian young people, so the process of their adaptation has its own characteristics. This point is very important for University teachers to understand and take into account. How the process of adaptation of a foreign student will take place depends on the effectiveness of his/her education at the University, mastering the future profession.
The success of adaptation is determined by many objective and subjective factors. The language barrier was identified as one of the main difficulties for foreign students: more than half of the students of the Yakovlev state University have great difficulties communicating in Russian. The process of adaptation of students is influenced by the level of development of adaptability. In the course of the research, the diagnostics of foreign students' adaptability was carried out, for this purpose, the methods "self-Assessment of psychological adaptability" and "Assessment of emotional and activity adaptability" were used. The research was conducted at the I.Ya. Yakovlev Chuvash state pedagogical University. After processing and analyzing the results, the author concludes that the adaptability of most students is at a low level of development. At the same time, there are more girls with low socio-psychological adaptation than boys. In addition, a method was conducted aimed at studying the level of students ' anxiety. The analysis of the data showed that there is a link between the level of anxiety and the level of adaptability: the higher the anxiety indicators, the lower the adaptability indicators. In conclusion, it is concluded that more than half of foreign students experience difficulties related to adaptation to higher education.
AHP & fuzzy logic hybrid method for decision making in project management in a forestry industry
Authors: Caggy Almir Lima , Almeida Ely Sena de
Published: July 2020

Abstract: This paper aims to present the use of a hybrid tool to support decision making in a forestry industry in the state of Sao Paulo. It was applied the Analytical Hierarchy Process (AHP) and Fuzzy logic techniques in Microsoft's Excel® platform, aiming to disseminate an unrestricted tool of use across the company. A solid result was reached, where it was possible to rank all the qualitative aspects concerned by the company strategy, highlighting how the facility would be moving its efforts to achieve competitiveness gains within its projects.
THE ANTECEDENTS OF RECOGNIZE THE VALUE IN THE ABSORPTIVE CAPACITY
Authors: FILENGA DOUGLAS , SANCHEZ OTÁVIO P.
Published: July 2020

ABSTRACT Purpose: The ability of individuals to recognize the value of external, corporate-applicable information is critical to organizational absorptive capacity. This study aims to define and operationalize the recognize the value construct, identify its antecedents and predictive power. Originality/value: It analyzes how this construct occurs at the level of the individual, workgroups and processes, besides indicating its relationship with the other predictors present in the literature. The theoretical bases can be classified by Cohen and Levinthal (1990) and Zahra and George (2002). The first one considers absorptive capacity as a stock of knowledge, the second one, as dynamic capacity. Design/methodology/approach: We adopt the Structural Equation Modeling technique to test a variance model, with four predictors of general recognize the value. We use a non-probabilistic sample consisting of 283 individuals who answered an electronic questionnaire. Findings: The results are satisfactory, as the model shows a 40% prediction power of how recognize the value occurs. The work processes were found to show higher predictive power (β = 0.417), meaning that that processes of recognize the value are enablers of the organizational recognize the value of new information. The other hypotheses were also supported, but with comparatively minor effects. The study is limited to the identification and analysis of the effects of predictors and does not contemplate its consequences, whose research is suggested.
Uma metodologia de custo zero para medida de atrito de rolamento em VANTs
Authors: Pellegrini C.C. , Alves V.R.
Published: July 2020

Resumo A despeito do fato que medidas do coeficiente de atrito de rolamento são importantes em diversas áreas, o assunto em geral não é adequadamente tratado no ensino médio ou superior. Tal situação priva o estudante do conhecimento dos recursos experimentais utilizados para medir o coeficiente de atrito, além de comprometer o entendimento do fenômeno. Além disso, certos pares de materiais de interesse para a engenharia simplesmente não são encontrados na literatura, como no caso dos pneus utilizados em veículos aéreos não tripulados (VANTs). Na tentativa de suprir ambas as lacunas, o presente trabalho apresenta uma metodologia para a determinação do coeficiente de atrito de rolamento em VANTs. O método empregado é extremamente simples, em termos de implementação e da teoria utilizada, mas apresenta interesse do ponto de vista didático e devido ao fato de seu custo ser praticamente zero, utilizando apenas um plano inclinado e medidas da distância percorrida pelo VANT. Os resultados mostram valores do coeficiente de atrito dependentes do peso do veículo. Os valores obtidos são discutidos e sugestões para o aprimoramento futuro do experimento são apresentadas.
Alguns conceitos no ensino da Cosmologia que quase sempre levam a confusão
Authors: Horvath Jorge Ernesto
Published: July 2020

Resumo O ensino da evolução do nosso Universo é um dos temas mais complexos que podem ser abordados na sala de aula. Os conceitos envolvidos estão amiúde muito longe de qualquer intuição, e resultam difíceis de expor e discutir. Apontamos nesta comunicação alguns destes conceitos básicos relativos ao Big Bang, esmiuçando seu contexto científico e os erros mais comuns por parte dos estudantes e seus professores, com a intenção de melhorar o ensino neste ramo das ciências. Os perigos das analogias didáticas utilizadas são apontados em cada caso.
Physical activity impact on motor development and oxidative stress biomarkers in school children with intellectual disability
Authors: Alghadir Ahmad H. , Gabr Sami A.
Published: July 2020

SUMMARY OBJECTIVE Lower physical fitness and poor motor performance were shown to be linked with higher levels of oxidative stress in children and adolescents with intellectual disabilities. Therefore, a moderate aerobic exercise for 12-weeks was performed to evaluate the effects of physical activity scores on motor functions, oxidative stress, and intelligence quotients (IQ) in school children with intellectual disability. METHODS A total of 65 school children aged (12-18 Yrs) were randomly included in this study. Intellectual disability (ID),motor skills,physical fitness(VO2max), total energy expenditure (TEE), MDA, 8-OHdG, TAC, NO, and total oxidative stress(OS)were assessed using pre-validated WISC-IQ score test, BOT-2 test, PA questionnaire, and immunoassay techniques respectively. RESULTS WISC-IQ and BOT-2 set scores of intellectual and motor skills performance showed a significant correlation with physical activity status and the regulation of oxidative stress-free radicals in school children with mild and moderate ID following 12 weeks of moderate exercise. The intellectual and motor skills performance of the participants correlated positively with the increase in TAC activity and physical fitness scores and negatively with MDA, 8-OHdG, NO, and Total-OS, respectively. Stepwise multiple regression analysis of the demographic, physical status and oxidative stress parameters explained around78.0 to 93.4 % of intellectual disability variation among schoolchildren. CONCLUSION Moderate aerobic training for12 weeks has a positive impact on improving intellectual ability of schoolchildren with ID via modulating redox status, improves physical fitness, and motor skills proficiency.
Comparison of serum NEDD-9, CA 15-3, and CEA levels and PET metabolic parameters in breast cancer patients with 18 F-FDG PET / CT
Authors: Arslan Esra , Aral Hale , Aksoy Tamer , Afşar Çiğdem Usul , Karabulut Senem , Trabulus Fadime Didem Can , Gürsu Rıza Umar , Çermik Tevfik Fikret
Published: July 2020

SUMMARY OBJECTIVE Analyze the over expression of neural precursor cell expressed developmentally down-regulated protein 9 (NEDD-9) deregulated associated with a poor prognosis in various carcinomas. Our objective was to investigate the relationship between the levels of NEDD-9, CA 15-3, and CEA and PET (SUVmax, MTV40, TLG40) with the clinical parameters of patients with breast cancer (BC). METHODS One hundred and eleven patients (82 BC patients who underwent 18F-FDG PET/CT and 29 healthy controls) were evaluated. SUVmax, MTV, and TLG of the primary tumor were compared with the molecular and histopathological subtypes. 18F-FDG, MTV, and TLG were evaluated based on the clinical data, i.e., nodal involvement, distant metastasis, ER and PR status, Ki-67, serum levels of NEDD-9, CA15-3, and CEA. We compared the NEDD-9 in the BC and healthy control groups. RESULTS The mean ± SD of SUVmax in the 82 patients was 13.0 ± 8.6. A statistically significant relationship (p = 0.022) was found between the molecular subtypes and 18F-FDG uptake. The relationship between 18F-FDG uptake and TLG measured in patients <50 years, ER-PR negativity, and HER2 positivity were statistically significant (p=0.015, 0.007, 0.046, and 0.001, respectively). MTV40, TLG40, and CA 15-3 in metastatic patients were statistically significant (p=0.004, 0.005, and 0.003, respectively). NEDD-9 in the BC group was significantly higher than in the healthy group (p=0.017). There was a positive correlation between SUVmax and Ki67 and CA 15-3; MTV40 and CEA; CA 15-3, CEA, SUVmax, and MTV40; a negative correlation was found between CEA, TLG40, and age. CONCLUSION The use of SUVmax, MTV40, and TLG40 parameters with NEDD-9 and tumor markers has been shown to provide a high diagnostic, predictive, and prognostic value for the management of BC. This is considered to be the basis of interventions focused on the treatment objectives related to NEDD-9.
Immunological aspects of coronavirus disease during pregnancy: an integrative review
Authors: Silva Camila Radelley Azevedo Costa da , Oliveira Lisiane Vital de , Lopes Lorenna Peixoto , Santos Wancler Albert Gomes dos , Agra Isabela Karine Rodrigues
Published: July 2020

SUMMARY OBJECTIVE To review the immunological aspects of the 2019 coronavirus disease (COVID-19) in pregnancy, based on the scientific evidence currently available. METHODS An integrative review was performed by two independent researchers, based on the literature available in the MEDLINE (via PubMed) and LILACS databases, using the descriptors “pregnancy” and “COVID-19”. This search included articles published up until 14th April 2020 published in English, Spanish or Portuguese. After reading the articles available in their entirety, those related specifically to the immunological aspects of the disease in pregnancy were selected. We initially found a total of 62 articles; 52 were accessed in full-text, and 5 were finally selected. RESULTS Pregnant women are more affected by respiratory diseases possibly because of physiological, immune, and anatomical changes. Some studies highlight the important shift to a T-helper lymphocyte type 2 (Th2) immune response in pregnancy, as a potential contributor to the severity in cases of COVID-19. Additionally, the cytokine storm present in severe cases leads to an increased inflammatory state, which may deteriorate the clinical prognosis in this population. Therefore, pregnant women may represent a vulnerable group to COVID-19 infection, primarily due to the immune imbalance in the maternal-fetal interface. CONCLUSION Maternal immune response probably plays an important role in the pathophysiology of this infection, although some details remain unsolved. Although further studies are needed to deeply investigate the immunological aspects of the disease in pregnancy, our findings may provide insights into the possible immune mechanisms involved in the pathophysiology of COVID-19 in pregnancy.
BEYOND THE VIRUS: There cannot be a pandemic without the State
Authors: Toniol Rodrigo
Published: July 2020

Abstract Abstract: This paper starts with the acknowledgment of the importance of the State as an order-ing principle for the experience of the pandemic. Such a statement implies two complementary movements - although these will not be exhausted in the following pages. Firstly, it means that the notion of pandemic itself has a genealogy. It means that its emergence is the result of a histor-ical process and of specific political configurations, which are strongly associated with the con-solidation of the modern State. Second, if the treatment of the notion of a pandemic needs to be considered on the basis of its relationship with the state, an analysis of “pandemic” processes is undoubtedly a political debate. I finish by suggesting benefits of a possible approximation be-tween the notion of environmental justice and the critical principles for the analysis of the pan-demic that we are facing.
Lessons from the Covid-19 pandemic: sustainability is an indispensable condition of Global Health Security
Authors: Ventura Deisy de Freitas Lima , Giulio Gabriela Marques di , Rached Danielle Hanna
Published: July 2020

Abstract Among the possible developments of the Covid-19 pandemic at the international and national levels is the advancement of the Global Health Security (GHS) agenda. On the one hand, GHS might be able to give priority to health problems on the political agenda-setting, on the other, however, it might open up space for public security actors in decision-making processes to the detriment of the power of health authorities. This article critically analyzes the concept and the progress of the GHS agenda seeking to demonstrate that there can be no security in matters of public health when sustainability in its multiple dimensions is not taken into account. At the end, sustainability has a twofold responsibility: to maintain the consistency and permanence of emergency response actions, especially with investments in public health systems, with universal access, and to minimize the structural causes of pandemics linked to the environment.
COVID-19: Local/regional inequalities and impacts over critical healthcare infrastructure in Brazil
Authors: Sousa Júnior Wilson Cabral de , Gonçalves Demerval Aparecido , Cruz Dafne Brito
Published: July 2020

Abstract This article addresses regional inequalities about critical healthcare infrastructure for coping with the COVID-19, based on geospatial analysis and compartmental modeling (SEIR). The study sites were the São Paulo Macro Metropolis (MMP) and the Metropolitan Region of Vale do Paraíba/Litoral Norte (RMVPLN). The results indicated the absence of ICU beds in more than 2/3 of the municipalities, in addition to the concentration in regional hubs, for which the migration of COVID-19 cases from neighboring municipalities should be considered. The analysis with the SEIR model, performed for scenarios with and without social isolation, showed that the isolation adopted in the regions was able to postpone the collapse of the health infrastructure, reducing the reproduction rate of the disease. The simulations indicated a reproduction rate of 0.95 in order to avoid collapse in the health infrastructure for RMVPLN in the analyzed period. In addition, for future resilience, it is essential to address inequalities in terms of health infrastructure available for public and private access.
The Brazilian Amazon in Times of COVID-19: from crisis to transformation?
Authors: Castro Fabio de , Lopes Gabriela Russo , Brondizio Eduardo Sonnewend
Published: July 2020

Abstract The COVID-19 crisis is not a new issue. Conditions leading to it have been taking shape for decades. This pandemic is rather a symptom of much deeper challenges resulting from contemporary production and consumption structures, social inequalities, nature deterioration, and global connectivity. To think about the post-pandemic world is to envision solutions that tackle the root causes of the problem. Local communities and indigenous groups in the Brazilian Amazon are a source of much-needed social innovations that rely on alternative views of Nature and social relations. This essay aims to turn the attention to these practices as starting point to rethink our present and reshape our future. New pathways are needed in order to overcome the region’s ‘old normal’ marked by destructive resource expropriation and social inequalities, and move to a ‘new normal’ that rely on transformations to a more sustainable and equity-based society.
Violências contra adolescentes: análise das notificações realizadas no setor saúde, Brasil, 2011-2017
Authors: Pereira Vinícius Oliveira de Moura , Pinto Isabella Vitral , Mascarenhas Márcio Dênis Medeiros , Shimizu Helena Eri , Ramalho Walter Massa , Fagg Christopher William
Published: July 2020

RESUMO: Introdução: A violência sofrida na adolescência resulta em sérios prejuízos e sofrimento para a sociedade. Este estudo objetivou caracterizar o perfil das violências, das vítimas e dos prováveis autores das violências perpetradas contra adolescentes, bem como descrever o percentual de municípios notificantes por unidade da Federação. Métodos: Estudo transversal, realizado com dados de notificação de violência contra adolescentes do Sistema de Informação de Agravos de Notificação referentes ao período de 2011 a 2017. A significância estatística das diferenças entre as proporções na comparação entre sexos foi testada com o qui-quadrado. Estimaram-se razões de proporção para os tipos de violência mais frequentes segundo variáveis selecionadas. Resultados: As notificações foram procedentes de 75,4% dos municípios brasileiros. A violência física predominou no sexo masculino, na idade de 15 a 19 anos. A violência psicológica predominou no sexo feminino, entre 10 e 14 anos, quando praticada de forma repetitiva, no domicílio, por agressores familiares. A violência sexual prevaleceu no sexo feminino, entre 10 e 14 anos, nas raças/cores indígena, negra e amarela, quando perpetrada de forma repetitiva, no domicílio. A negligência predominou no sexo masculino, entre 10 e 14 anos, quando praticada de forma repetitiva, por agressores familiares. Conclusões: Violências sexuais ocorreram preponderantemente no sexo feminino e geram consideráveis impactos negativos à saúde mental, física, sexual e reprodutiva. Violências comunitárias perpetradas com objetos perfurocortantes e arma de fogo tiveram destaque no sexo masculino e são fatores de risco significativos para a sobremortalidade masculina. Como os problemas são complexos, demandam atuação intersetorial para seu enfrentamento.
Análise das notificações de violência por parceiro íntimo contra mulheres, Brasil, 2011-2017
Authors: Mascarenhas Márcio Dênis Medeiros , Tomaz Gabriela Rodrigues , Meneses Gabriel Medina Sobreira de , Rodrigues Malvina Thais Pacheco , Pereira Vinícius Oliveira de Moura , Corassa Rafael Bello
Published: July 2020

RESUMO: Objetivo: Analisar as notificações de violência por parceiro íntimo (VPI) contra mulheres. Métodos: Estudo transversal com dados de notificação compulsória de VPI contra mulheres (≥ 15 anos de idade) registrados no Sistema de Informação de Agravos de Notificação (Sinan) no período de 2011 a 2017, analisados por meio do teste χ2 e regressão de Poisson com variância robusta para estimar razões de proporção (RP) e respectivos intervalos de confiança de 95% (IC95%). Resultados : Foram notificados 454.984 casos de violência perpetrados por homens contra mulheres, dos quais 62,4% eram VPI. Os tipos de violência mais relatados foram os abusos físicos (86,6%), psicológicos (53,1%) e sexuais (4,8%). VPI esteve associada, positivamente, às mulheres de 20-39 anos de idade (RP = 1,70; IC95% 1,68; 1,71), gestantes (RP = 1,07; IC95% 1,06; 1,08), parceria conjugal (RP = 1,55; IC95% 1,54; 1,56), ocorrência no domicílio (RP = 1,80; IC95% 1,79; 1,81), reincidência da violência (RP = 1,77; IC95% 1,76; 1,78) e ingestão alcoólica pelo agressor (RP = 1,12; IC95% 1,12; 1,13). Violência física associou-se ao grupo de 20-39 aos de idade (RP = 1,03; IC95% 1,02; 1,03). Violência psicológica predominou entre mulheres com ≥ 40 anos de idade (RP = 1,33; IC95% 1,31; 1,35). Violência sexual foi relatada em maior proporção entre gestantes (RP = 2,71; IC95% 2,59; 2,83) e mulheres com deficiência ou transtorno (RP = 2,30; IC95% 2,17; 2,44). Conclusão: A maioria das notificações de violência contra a mulher registradas nos serviços de saúde foi perpetrada por parceiro íntimo, com destaque para a violência física, psicológica e sexual. Foi possível identificar fatores associados à VPI como idade, escolaridade, gestação, ocorrência no domicílio, reincidência e ingestão de bebida alcoólica pelo agressor.
Avaliação da Atenção Primária à Saúde na ótica dos usuários: reflexões sobre o uso do Primary Care Assessment Tool-Brasil versão reduzida nos inquéritos telefônicos
Authors: Perillo Rosângela Durso , Bernal Regina Tomie Ivata , Poças Kátia Crestine , Duarte Elisabeth Carmen , Malta Deborah Carvalho
Published: July 2020

RESUMO: Objetivo: Avaliar os atributos da atenção primária à saúde (APS) na ótica dos usuários entrevistados em inquérito telefônico, em Belo Horizonte. Métodos: Estudo transversal de base populacional, com dados do Sistema de Vigilância de Fatores de Risco e Proteção para Doenças Crônicas por Inquérito Telefônico (Vigitel) 2015, que incluiu um módulo adicional sobre a avaliação da APS. Utilizou-se o Primary Care Assessment Tool (PCATool-Brasil) em versão reduzida, com adaptações. Resultados: Entrevistaram-se 872 usuários, com o predomínio de mulheres, adultos de maior idade, com baixa escolaridade, sem companheiro, que se autodeclaram de cor parda e não possuem plano de saúde. O escore geral do Vigitel avaliação foi 5,48 (intervalo de confiança - IC95% 5,35 - 5,61) e do PCATool reduzido 5,01 (IC95% 4,86 - 5,15). Em ambos os instrumentos, os escores dos atributos primeiro contato (utilização), longitudinalidade e coordenação (cuidado) se apresentaram superiores ao escore geral de maior valor (5,48). O escore médio do atributo primeiro contato (utilização) foi o mais bem avaliado pelos usuários, considerando o instrumento Vigitel avaliação (7,09; IC95% 6,93 - 7,26). De modo geral, as avaliações dos instrumentos são coincidentes, porém os atributos primeiro contato (utilização), integralidade (serviços disponíveis) e coordenação (sistema de informação) apresentaram melhores escores médios no instrumento Vigitel avaliação, quando comparado ao PCATool reduzido. Não houve diferença na avaliação segundo regional de saúde. Conclusão: A utilização do PCATool na versão reduzida em inquérito telefônico e com pequenas adaptações à realidade local mostrou-se nova possibilidade de avaliação dos serviços da APS e pode se tornar útil na gestão dos serviços de saúde.
Pasting properties of raw and extruded cowpea cotyledons flours
Authors: Hashimoto Jorge Minoru , Schmiele Marcio , Nabeshima Elizabeth Harumi
Published: July 2020

Abstract There is little research on the viscosity profile analysis of cowpea cotyledon flour (CCF). Due to the new ways of using pulses grains in the diet, it is important to evaluate the viscoamylographic behavior of raw and processed CCF. The CCF was obtained from the cultivars BRS Guariba and BRS Novaera and evaluated in the Rapid Visco Analyzer (RVA). For raw CCF it was used the “Standard 1” program. The extruded CCF was obtained from the cultivar BRS Guariba, which was processed following a central rotational composite design, combining thermoplastic extrusion temperatures (124; 130; 145; 160; 166 °C) and conditioning moisture (16.2%; 17%; 19%; 21%, 21.8%). The obtained extrusions were ground (Ø > 0.5 mm) and evaluated in the RVA using the program “Extrusion 2”. The raw CCF from BRS Guariba presented higher protein, lipid and mineral content and lower carbohydrate content than BRS Novaera. The raw CCF from BRS Guariba showed lower values of pasting temperature (79.35 °C), viscosity breakdown (103.00 cP) and seatback (1447.33 cP) compared to raw CCF from BRS Novaera. The extrusion process drastically changed all viscosity parameters, increasing the initial viscosity value and decreasing the value of other parameters. The extruded CCF had different pasting properties. CCF extruded at 166 °C and 19% moisture resulted in flours with higher initial viscosity and lower retrogradation values, which can be used as a thickener in food products, in addition to increase nutritional value.
Towards a Decolonial Language Teacher Education
Authors: Borelli Julma Dalva Vilarinho Pereira , Silvestre Viviane Pires Viana , Pessoa Rosane Rocha
Published: July 2020

ABSTRACT In this article, we discuss the challenges of teacher education for the 21stCentury, taking decoloniality as a possible way to resignify our praxis. One of the challenges in decolonial thinking is to problematize the coloniality of knowledge (LANDER, 2005), which is established through the privilege of scientific knowledge and the invisibilization of other forms of knowing. In this respect, Castro-Gomez (2007) affirms that the university is an institution that contributes significantly to the maintenance of this logic. As university teachers directly involved in language teacher education, we have sought different ways to develop our praxis as a decolonial project (WALSH, 2013). In this article, we discuss decoloniality and present three praxes in which our objective was attempting to live language teacher education otherwise.
John Dewey: a busca por uma pedagogia retórica
Authors: Costa-Lopes Viviane da , Cunha Marcus Vinicius da
Published: July 2020

Resumo O ponto de partida deste artigo é uma polêmica que envolve o filósofo e educador John Dewey (1859-1952) desde século passado: tanto autores contrários quanto autores favoráveis às suas teses consideram as suas concepções educacionais associadas ao ceticismo, corrente filosófica criada por Pirro de Élis (360-270 a.C.). Essa polêmica é investigada neste artigo por meio da análise retórica proposta por Perelman e Olbrechts-Tyteca, comparando o discurso de Dewey com as formulações pirrônicas. Dessa investigação resulta a descoberta de algumas semelhanças e uma importante diferença entre os discursos examinados. Essa diferença, por sua vez, conduz ao exame de uma corrente filosófica anterior ao pirronismo, a sofística, cujo principal representante é Protágoras de Abdera (490-421 a.C.). A sofística é analisada neste trabalho segundo autores contemporâneos que divergem da caracterização tradicional instituída por Platão. As conclusões identificam importantes coincidências entre o discurso deweyano e o discurso sofístico, o que permite associar Dewey à tradição discursiva retórica e posicionar as suas propostas educacionais no âmbito da pedagogia retórica. Essa pedagogia propõe levar os estudantes a compor e expressar as suas inclinações pessoais, não no estreito espaço da vida individual, mas no horizonte mais amplo da coletividade, por meio de métodos que visam projetar o aluno no espaço público da deliberação e da ação.
Realização acadêmica e problemas de internalização em alunos do ensino básico e secundário em Portugal
Authors: Veríssimo Lurdes , Dias Pedro , Santos Elodie , Ortigão Sofia
Published: July 2020

Resumo O presente estudo teve como objetivo geral analisar as diferenças nos problemas de internalização (ansiedade, depressão, queixas somáticas), avaliados por diferentes informadores (pais, professores e jovens), em função do nível de realização acadêmica, em alunos do ensino básico e secundário. Para tal, recorreu-se a uma amostra estratificada representativa da população portuguesa constituída por 1.510 alunos, com idades compreendidas entre os 11 e 18 anos. Do conjunto de provas da bateria Achenbach System of Empirically Based Assessment validados para a população portuguesa, foram utilizadas a Child Behavior Checklist 6-18, a Youth Self-Report 11-18 e a Teacher Report Form 6-18. De uma forma geral, os resultados evidenciam que os alunos com realização acadêmica baixa apresentam mais problemas de internalização do que alunos com realização acadêmica média e/ou elevada. No entanto, no 3º ciclo do ensino básico, na perspectiva dos próprios jovens, os alunos com realização acadêmica elevada apresentam maiores níveis de ansiedade/depressão, comparativamente aos alunos com realização acadêmica baixa. Estes resultados indicam-nos que, para além de os alunos com realização acadêmica baixa se encontrarem numa situação de risco e vulnerabilidade para problemas de internalização, é necessário ter também especial atenção aos alunos com realização acadêmica elevada. Destes resultados decorrem implicações práticas relevantes para os contextos escolares, nomeadamente ao nível da consideração da relação entre a realização acadêmica e o bem-estar psicológico.
Interface argamassa-suporte: análise das características físicas com base em várias campanhas experimentais
Authors: Torres Maria Isabel Morais , Flores-Colen Inês , Silveira Dora Susana Gomes da , Pinto Rafael Travincas , Matias Gina Maria Lourenço
Published: July 2020

Resumo Os revestimentos de paredes mais usados em Portugal, e mesmo ano âmbito europeu e mundial, continuam sendo as argamassas de revestimento, quer sejam à base de cal ou de cimento, quer sejam tradicionais, feitas em obra ou pré-doseadas. De acordo com a normalização disponível, o estudo de desempenho dessas argamassas é realizado sobre provetes produzidos em laboratório, com medidas normalizadas e em condições de cura e de ensaio pré-estabelecidas. No entanto, quando as argamassas são aplicadas sobre os suportes reais o seu comportamento final não será exatamente o mesmo. As dimensões, as condições de aplicação e as condições de cura são distintas. Assim, é consensual dizer que as características finais dos rebocos aplicados em condições reais de exposição serão distintas das obtidas em laboratório. O estudo que se pretende apresentar faz parte de uma investigação mais alargada no âmbito do projeto IF Mortar, em que se pretende analisar a influência das características de diversos suportes nas características de diferentes tipos de argamassa, para se prever, de forma mais rigorosa, qual o comportamento final das argamassas após sua aplicação. Neste artigo são apresentados alguns dos resultados já obtidos em campanhas experimentais, relativos às características físicas de diversas argamassas aplicadas sobre distintos suportes.
Using ready-mixed mortars in concrete block structural masonry
Authors: Matos Paulo Ricardo de , Schankoski Rudiele Aparecida , Pilar Ronaldo , Prudêncio Junior Luiz Roberto
Published: July 2020

Abstract Ready-mixed mortars have been increasingly used due to their potential for waste reductions and productivity increases. However, research regarding their use in structural masonry applications are practically non-existent. Thus, this work investigated the technical feasibility of using ready-mixed mortars with nominal compressive strengths of 6, 9 and 14 MPa and storage times of 0 and 36 hours in concrete block structural masonry. The fresh state properties of the mortars were evaluated at 0 and 36 hours through the slump test, consistency and plasticity by the Gtec test, and entrained air content. The compressive and flexural strengths of the mortars were determined at 28 days. In addition, three-row prisms were tested for compressive strength and modulus of elasticity, and four-row prisms for flexural strength in the bending test, all at 28 days. The results showed that the 6 and 9 MPa ready-mixed mortars showed satisfactory maintenance of the fresh properties from 0 to 36 hours and adequate hardened properties for both casting ages, in contrast to the 14 MPa mortar. Regarding the prism tests, the increase in storage time did not significantly affect the properties evaluated for a reliability of 95%.
Aprimoramentos sugeridos à ISO 37120 “Cidades e comunidades sustentáveis” advindos do conceito de cidades inteligentes
Authors: Abreu João Paulo Maciel de , Marchiori Fernanda Fernandes
Published: July 2020

Resumo Cidades inteligentes são aquelas onde se utiliza tecnologias de informação e comunicação visando à gestão eficiente no uso de recursos e uma maior participação cidadã. Nelas, sustentabilidade é um importante objetivo, levando pesquisadores a adotar a expressão “cidades inteligentes sustentáveis”. Para atingir esse objetivo, são necessários sistemas de avaliação por indicadores, direcionando políticas públicas e investimentos, comparações entre cidades e reprodução de bons exemplos. O mais importante desses sistemas é proposto pela norma ISO 37120:2018 “Sustainable cities and communities - Indicators for city services and quality of life”. Entretanto, seriam necessários indicadores específicos para adequada avaliação de cidades inteligentes, considerando suas características particulares e seu foco sustentável. Diante desse cenário, por meio de uma revisão bibliográfica, pesquisou-se por estudos anteriores que pudessem ser referência em indicadores sobre cidades inteligentes, complementares à ISO. As pesquisas consideradas nessa revisão possuem visão holística de cidades. Como resultado, foram obtidos indicadores com variáveis qualitativas e quantitativas ordinais, e alguns indicadores em sobreposição aos presentes na ISO. Ao final da pesquisa, são sugeridas melhorias com o incremento aos indicadores sugeridos e modificação de alguns segundo o conceito de cidades inteligentes.
Painel MDP com resina poliuretana à base de óleo de mamona com adição de cimento
Authors: Couto João Paulo Monteiro , Nascimento Maria Fátima , Aquino Vinícius Borges de Moura , Panzera Tulio Hallak , Christoforo André Luis , Lahr Francisco Antonio Rocco
Published: July 2020

Resumo Neste trabalho foi investigada a influência da inclusão de frações mássicas de cimento Portland (CP-V ARI) [0%, 10%, 20% e 30%] a título de simular parcelas de resíduo de construção civil que tenha frações cimentícias não hidratadas na produção de painéis de partículas compostos de madeira de Pinus sp. e resina poliuretana à base de mamona, buscando avaliar o potencial de painéis produzidos com adição de materiais granulares como resíduos de construção civil. A caracterização física e mecânica de painéis MDP com adição de cimento foi feita com o auxílio da norma brasileira NBR 14810 e da análise de variância (ANOVA), sendo analisadas as propriedades físicas e mecânicas. Foram fabricados 4 painéis de 400 mm x 400 mm x 10 mm com partículas de Pinus sp. e resina poliuretana à base de óleo de mamona com teor de adesivo igual a 10% em relação à massa seca de partículas, para cada tratamento, totalizando 16 painéis. Para cada painel foram retirados 3 corpos de prova (CP) para avaliação das propriedades físicas e mecânicas. A adição de frações mássicas de cimento acima de 10% impactou negativamente as propriedades mecânicas dos painéis, por ter diminuído os valores de MOE e MOR. As propriedades de densidade, absorção e inchamento se mantiveram dentro dos requisitos da norma.
Discrete-element modelling of the trapdoor arching effect in sand and rubberised sand
Authors: Khatami Hamidreza , Deng An , Jaksa Mark
Published: July 2020

The onset and evolution of soil arching in a trapdoor apparatus was investigated using discrete-element modelling (DEM). The effects of wall friction, particle size and material type (sand and rubber–sand) on the micro-behaviour of the granular material during arching was monitored. It was observed that when the particles are large with respect to the trapdoor width, they form a stable arch over the trapdoor element. An ‘intermediate zone’ within the granular materials is then introduced. This is the zone where inter-particle contact forces increase in the early stage of active arching and then decrease as the trapdoor displacement continues. The DEM simulation results showed that the granular particles rearranged in reaction to arching, causing uneven densities throughout the backfills. The distributions of two-dimensional stresses in the cross-section of the modelled sand and rubber–sand backfills were obtained using the kriging method and compared.
The dimensional dependence of the shape factor on thermodynamics
Authors: Shuai Zhang
Published: July 2020

In this paper, the size-dependent model of the shape factor λ is established and the melting point T m(D, λ) of quantum dots with tetrahedral, decahedral, octahedral, cuboctahedral and icosahedral atomic structures is further introduced into the model, where D represents the diameter of quantum dots. For these quantum dots, the key difference is λ, which is defined as the surface area ratio between non-spherical and spherical quantum dots with identical volumes. It is found that when the size is given, λ behaves as strongly shape dependent with the sequence of λ. The validity of the model for the T m(D, λ) function is confirmed by the experimental and simulation results of the size- and shape-dependent thermodynamic stability in silver (Ag) quantum dots.
Welding of differentially heat-strengthened rails. Industrial testing
Authors: Kozyrev N. A. , Shevchenko R. A. , Usol’tsev A. A. , Prudnikov A. N. , Bashchenko L. P.
Published: July 2020

The article describes the study of welding processes with the subsequent control of cooling of full-profile rail joints, produced by passing alternating electric current pulses after welding. The influence of welding modes on the quality of welded joint was investigated. Welding was carried out on a resistance butt welding machine MCP-6301 in conditions of the rail welding company LLC “RSP-M” (RSP-29). For research, the samples of P65 type full-profile rails of DT350 category 600 mm long were cut out. The isothermal holding conditions after welding were controlled using a personal computer with a change in the program of the SIMATIC S7-300 industrial controller and the software SIMATIC STEP 7, which allows modes of controlled cooling to be set. The control program was written in the LAD graphic language. To search for optimal modes of controlled cooling, a complete factor experiment N = 2k was carried out. Non-heat-treated joints were tested for three-point static bending according to the state standard STO RZD 1.08.002 – 2009 “Railway rails, welded by electric contact method”. Static bending tests were carried out on the press of PMS-320 type. Values of the force arising during bending Pbend and the bend deflection fpr at which the control sample is destroyed, were determined, as well as maximum values of these indicators if the sample was not destroyed during the tests. During the experiments, regression models were obtained for output parameters of the bending force and bend deflection. Macrostructure of the samples and distribution of the metal hardness on rolling surface of the rails welded joint were studied. A new method of resistance butt welding was developed, which makes it possible to obtain a welded connection of P65 type rails of DT350 category with properties that exceed the technical requirements of the mentioned state standard.
Technological modes of efficient metallization of iron-oxide-containing waste from metallurgical production
Authors: Anikin A. E. , Galevskii G. V. , Rudneva V. V.
Published: July 2020

During the research, rolled scale and gas cleaning slimes from oxygen-converter workshop No. 1 of JSC “EVRAZ ZSMK” were used as iron-oxide-containing materials. Semi-coke from brown coals of the Berezovskoye deposit of the Kansko-Achinsk basin (temperature of semi-coking is 750 °C), coke fines of PJSC “Coke” and dust from coke dry-quenching plant of JSC “EVRAZ ZSMK” were used as carbon reducing agents. Total iron, FeO and Fe2 O 3 oxides amount to 73.3, 75.5 and 20.9 % in scale, 41.2, 4.7 and 53.7 % in sludge, respectively. Sludge also contains 4.3 % of total carbon and 20.6 % of CaO. Brown-coal semi-coke, coke fines and coke dust contains carbon and volatiles 94.05 and 9.5 %, 97.50 and 2.1 %, 97.47 and 1.6 % on dry ashless weight, respectively. For metallization of furnace charges with composition: scale, slime–semi-coke, coke fines, dust with addition of 10 % water-soluble binding–molasses, strong unroasted briquettes were pressed. Metallization modes of analyzed charge compositions were thermodynamically predicted and technologically determined. Metallization degree and metal iron content at usage of brown-coal semi-coke were found to be 97.5 and 90.2 % for scale, 97.5 and 71.3 % for sludge; of coke fines: 70.7 and 61.9 % for scale, 68.9 and 48.4 % for sludge; of coke dust: 72.1 and 62.6 % for scale, 69.2 and 48.2 % for sludge. The possibility of achievement the metallization degree of 97.0 – 98.0 % was established for briquetted charge from scale – brown-coal semi-coke with 92.0 – 93.0 % of total iron, 89.8 – 90.6 % of metallic iron, 2.8 – 3.2 % of FeO, 0.06 – 0.08 % of S, 0.016 – 0.018 % of P, 1.7 – 1.9 % of C, 1.0 – 1.2 % of CaO and 0.25 – 0.35 % of MgO at 1173 K and duration of 40 min.
Manganese ores of the Kemerovo region – Kuzbass and methods of their enrichment
Authors: Nokhrina O. I. , Rozhikhina I. D. , Edil’baev A. I. , Edil’baev B. A.
Published: July 2020

Manganese ores of the vast majority of domestic deposits are of low quality: with low content of manganese (18 – 24 %) and high specific content of phosphorus (ratio P/Mn > 0.006). They have an increased content of iron and silicon and they are difficult to enrich. The main part of balance reserves of manganese ores – 98.5 million tons (64.2 %) is concentrated in large Usinskoye field in the Kemerovo region. In addition to Usinskoye, there are also deposits in this region Kaigadatskoye (32.7 million tons), Durnovskoye (300 thousand tons), Selezenskoye fields and the Chumay plot. For a comprehensive approach to solving the proposed problem it is needed to assess technical and economic feasibility of all stages (exploration, extraction and enrichment of manganese ores, their subsequent processing and consumption) of involvement of manganese ores from these deposits in production. Using developed technology of calcium-chloride enrichment, high-quality manganese concentrates are obtained from carbonate, including high-phosphorous ores of the Usinskoye field, poor oxide and ferromanganese ores of the Selezenskoye and the Durnovskoye fields. Extraction of manganese from manganese-containing raw materials into concentrate was at least 90 %. The resulting concentrate contains 58 – 64 % of manganese, less than 0.01 % of phosphorus, 0.02 – 0.05 % of iron oxide, 0.5 – 1.0 % of silica and sulfur. Thermodynamic calculations and experimental studies on the enrichment of polymetallic manganese-containing ores from the Chumay plot allowed us to determine the main technological parameters for extracting valuable components. The use of optimal technological parameters of enrichment allows extraction of up to 95 – 97 % of manganese and 98 – 99 % of nickel from raw materials.