bluuebunny/crossref_metadata_2025 huggingface dataset:
Avaliação das aprendizagens nas aulas de ciências naturais e biologia e geologia: das perceções às práticas
Authors: Correia Sónia de Jesus Elias , Cid Marília Pisco Castro
Published: March 2021

RESUMO A avaliação das (e para as) aprendizagens tem vindo a assumir uma presença cada vez maior no campo da investigação em Educação. Uma das premissas incontornáveis assume que, ao contrário do que ainda se continua a verificar, a avaliação não deve ser entendida como extrínseca ao processo de ensino e de aprendizagem, pois encontra-se intimamente ligada aos componentes que envolvem o ato de ensinar e de aprender. O artigo resulta de estudo de caso realizado numa escola portuguesa, que pretendeu caracterizar estratégias de avaliação e conhecer perceções sobre avaliação das aprendizagens nas disciplinas de Ciências Naturais e Biologia e Geologia. O estudo seguiu uma abordagem qualitativa, de natureza interpretativa. As práticas de avaliação observadas estão associadas às perceções que professor e alunos manifestam sobre avaliação e mostram-se mais orientadas para a classificação e seleção dos alunos do que para a melhoria dos processos de ensino e de aprendizagem.
A cultura da reprovação em escolas organizadas por ciclos
Authors: Almeida Frederico Alves , Alves Maria Teresa Gonzaga
Published: March 2021

RESUMO A reprovação está presente na educação brasileira desde a sua expansão, interferindo na trajetória escolar e na qualidade no ensino. Embora ações tenham sido tomadas para combater o problema, as taxas de reprovação e abandono persistem, retrato da permanência de uma pedagogia da repetência. Este trabalho investigou a crença de educadores sobre a reprovação e sua relação com práticas de avaliação em escolas públicas de ensino fundamental da rede municipal de Contagem-MG, Brasil, bem como a variação existente entre essas escolas. Por meio de um modelo de regressão logística multinível, foram definidas duas escolas em que se realizou uma pesquisa comparativa, com observação e entrevistas a educadores. Os resultados indicam que certas decisões avaliativas por vezes se distanciam de conhecimentos pedagógicos, influenciadas pela crença que a retenção de um aluno favorece o seu aprendizado, além de funcionar como um instrumento de coerção e justiça.
Influence of fiber alignment on pseudoductility and microcracking in a cementitious carbon fiber composite material
Authors: Rutzen Matthias , Lauff Philipp , Niedermeier Roland , Fischer Oliver , Raith Manuel , Grosse Christian U. , Weiss Ursula , Peter Malte A. , Volkmer Dirk
Published: March 2021

This research examines the effect of fiber alignment on the performance of an exceptionally tough 3D-printable short carbon fiber reinforced cementitious composite material, the flexural strength of which can exceed 100 N/mm2. The material shows pseudoductility caused by strain-hardening and microcracking. An extrusion-based manufacturing process allows accurate control over the spatial alignment of the fibers’ orientation, since extrusion through a tight nozzle leads to nearly unidirectional alignment of the fibers with respect to the directional movement of the nozzle. Specimens were investigated using mechanical tests (flexural and tensile load), augmented by non-destructive methods such as X-ray 3D computed tomography and acoustic emission analysis to gain insight into the microstructure. Additionally, digital image correlation is used to visualize the microcracking process. X-ray CT confirms that about 70% of fibers show less than 10° deviation from the extrusion direction. Systematic variations of the fiber alignment with respect to the direction of tensile load show that carbon fibers enhance the flexural strength of the test specimens as long as their alignment angle does not deviate by more than 20° from the direction of the acting tensile stress. Acoustic emission analysis is capable of evaluating the spatiotemporal degradation behavior during loading and shows consistent results with the microstructural damage observed in CT scans. The strong connection of fiber alignment and flexural strength ties into a change from ductile to brittle failure caused by degradation on a microstructural level, as seen by complementary results acquired from the aforementioned methods of investigation.
ESTRATÉGIAS EMERGENCIAIS ADOTADAS PELAS INSTITUIÇÕES SUPERIORES BRASILEIRA FRENTE A PANDEMIA DO COVID-19
Authors:   CENTRO UNIVERSITÁRIO UNICHRISTUS, VERDE ANTONIO AUGUSTO GOES FERREIRA LIMA , RICARTE MARCOS ANTONIO CHAVES ,   FACULDADE PAIVA ANDRADE
Published: March 2021

COM O INÍCIO DA CONTAMINAÇÃO COMUNITÁRIA DO CORONA VÍRUS, COVID-19, A DECLARAÇÃO DE ESTADO DE CONFINAMENTO E A PUBLICAÇÃO DE PORTARIAS DO MINISTÉRIO DA EDUCAÇÃO - MEC SUSPENDENDO AS AULAS EM TODO TERRITÓRIO BRASILEIRO, AS INSTITUIÇÕES DE ENSINO SUPERIOR - IES SE VIRAM DIANTE DO DESAFIO DE DECIDIREM OU NÃO PELA ADOÇÃO DO ENSINO REMOTO EMERGENCIAL - ERE. ESTE TRABALHO TEM A MISSÃO DE CONTRIBUIR PARA O MELHOR ENTENDIMENTO DESTE MOMENTO PECULIAR PARA A EDUCAÇÃO SUPERIOR BRASILEIRA, DESCREVENDO E DISCUTINDO AS ESTRATÉGIAS PEDAGÓGICAS ADOTADAS EM RESPOSTA À CRISE. UTILIZANDO UMA METODOLOGIA CONHECIDA COMO BOLA DE NEVE, CHEGOU-SE A UMA AMOSTRA NÃO PROBABILÍSTICA DE 725 INDIVÍDUOS, A GRANDE MAIORIA OCUPANTES DE CARGOS DE GESTÃO NAS IES. UM QUESTIONÁRIO ELETRÔNICO FOI ENVIADO POR E-MAIL A ESTES INDIVÍDUOS, NO INTERVALO DE TEMPO COMPREENDIDO ENTRE OS DIAS 27 DE MARÇO A 20 DE ABRIL DE 2020, RETORNANDO 130 RESPOSTAS. OS RESULTADOS ALCANÇADOS DEMONSTRAM QUE A MAIORIA DA IES OPTOU PELO CAMINHO DA SUBSTITUIÇÃO DAS AULAS PRESENCIAIS PELO ERE, PORÉM AS QUE JÁ TINHAM EXPERIÊNCIA EM EAD LEVAM VANTAGEM EM RELAÇÃO AS QUE NÃO TINHAM. NO ENTANTO, A ESTRATÉGIA PEDAGÓGICA ADOTADA POR AMBOS OS GRUPOS REPLICAM O MODELO DE AULA DO ENSINO PRESENCIAL, COM A VALORIZAÇÃO DE CONTEÚDOS QUE MINIMIZE A DISTÂNCIA PROFESSOR-ALUNO E A APLICAÇÃO DE TESTES COMO INSTRUMENTO DE VERIFICAÇÃO DO APRENDIZADO
Speed-Torque Characteristics of Torque Motor with Tape Winding Stator
Authors:   National Research Tomsk Polytechnic University, Dolgih Antonina , Martemyanov Vladimir ,   National Research Tomsk Polytechnic University
Published: March 2021

The speed-torque characteristics of a torque motor with a new type of active element – the tape winding is considered. The analytical studies of the motor speed-torque characteristics determination is difficult because it is required to take into account the distributed current flowing through the winding elements. This leads to the numerical methods application, in particular, COMSOL Multiphysics software based on the finite element method (FEM). Attention is paid to the changing of the motor developed torque in the presence of EMF created in the winding during the rotor rotation. It is shown that the motor torque with a rotor rotation frequency changing depends mainly on the nature of the distributed current lines flowing through the winding elements, despite the fact that the consumed current value changes to a lesser extent. The obtained speed-torque characteristics of the torque motor has a form similar to ones of separately excited DC motors. The research results allow assessing the expected characteristics of the motor model and are an integral part of the developed design policy of the torque motor with the tape winding stator.
Samples preparation of humanplasma for proteomic assay and LC-MS analysis v1
Authors: T. Kopylov Arthur , A Stepanov Alexander , A Malsagova Kristina , L Kaysheva Anna , Butkova Tatiana , Zakharova Natalia , Kostyuk Georgy , Elmuratov Artem
Published: March 2021

The proprietary protocol of human plasma samples preparation for proteomic and metabolomic assays following-up the high-resolution liquid chromatography-mass spectrometry analysis. The protocol provides support for the label-free quantitative proteomic measurements using UPS-2 (Universal Proteomic Standard, dynamic range) kit.
Fact-Checking Interventions as Counteroffensives to Disinformation Growth: Standards, Values, and Practices in Latin America and Spain
Authors: Moreno-Gil Victoria , Ramon Xavier , Rodríguez-Martínez Ruth
Published: March 2021

As democracy-building tools, fact-checking platforms serve as critical interventions in the fight against disinformation and polarization in the public sphere. The Duke Reporters’ Lab notes that there are 290 active fact-checking sites in 83 countries, including a wide range of initiatives in Latin America and Spain. These regions share major challenges such as limited journalistic autonomy, difficulties of accessing public data, politicization of the media, and the growing impact of disinformation. This research expands upon the findings presented in previous literature to gain further insight into the standards, values, and underlying practices embedded in Spanish and Latin American projects while identifying the specific challenges that these organizations face. In-depth interviews were conducted with decision-makers of the following independent platforms: Chequeado (Argentina), UYCheck (Uruguay), Maldita.es and Newtral (Spain), Fact Checking (Chile), Agência Lupa (Brazil), Ecuador Chequea (Ecuador), and ColombiaCheck (Colombia). This qualitative approach offers nuanced data on the volume and frequency of checks, procedures, dissemination tactics, and the perceived role of the public. Despite relying on small teams, the examined outlets’ capacity to verify facts is noteworthy. Inspired by best practices in the US and Europe and the model established by Chequeado, all the sites considered employ robust methodologies while leveraging the power of digital tools and audience participation. Interviewees identified three core challenges in fact-checking practice: difficulties in accessing public data, limited resources, and the need to reach wider audiences. Starting from these results, the article discusses the ways in which fact-checking operations could be strengthened.
Qualidade da lã de ovelhas da raça Corriedale de fenótipo naturalmente colorido ou branco
Authors: Costa Pablo Tavares , Mendonça Gilson de , Vieira Thiago Pereira , Vaz Ricardo Zambarda
Published: March 2021

Objetivou-se comparar ovinos Corriedale brancos e naturalmente coloridos em relação às principais características qualitativas da lã. Foram utilizadas amostras de lã de 112 ovelhas da raça Corriedale de dois grupos fenótipos (56 brancas e 56 naturalmente coloridas), avaliadas por meio do equipamento Optical Fibre Diameter Analysis (OFDA 2000®). Os dados foram submetidos a análise de variância para avaliar o efeito do grupo fenótipo e as médias foram comparadas pelo teste F. O comprimento da mecha, a distância da extremidade até o ponto mais fino ao longo da mecha e o fator de conforto foram maiores para animais brancos (p < 0,05). O diâmetro da fibra, o coeficiente de variação do diâmetro, a distribuição estatística das fibras que discrepam do diâmetro médio da amostra, o número de micras que se afastam do diâmetro médio de 5% das fibras mais grossas, a qualidade do fiado e a curvatura das fibras foram maiores em animais naturalmente coloridos (p < 0,05). Conforme o sistema brasileiro de classificação de lãs, a maioria das amostras foi classificada como Cruza 2. Conclui-se que ovelhas Corriedale brancas e naturalmente coloridas apresentam características distintas em aspectos qualitativos das fibras de lã, embora dentro dos padrões recomendados para a raça.
Adubação nitrogenada associada à inoculação de Bradyrhizobium japonicum como estratégia para amenizar os efeitos da desfolha na soja
Authors: Zuffo Alan Mario , Ratke Rafael Felippe , González Aguilera Jorge , Morais Karen Annie Dias de , Silva Jorge Xavier da , Trento Amanda Camila Silva
Published: March 2021

O nitrogênio (N) promove a fotossíntese, a produção e a translocação de fotoassimilados, bem como aumenta a taxa de crescimento das plantas. Este estudo teve como objetivo avaliar a resposta da soja a desfolha e a doses de N, associada à inoculação de B. japonicum. O delineamento experimental utilizado foi o de blocos casualizados, disposto em esquema fatorial 4 × 4, com quatro repetições. Os tratamentos foram constituídos por quatro níveis de desfolha (0, 33, 66 e 99%) realizado no estádio R3 (legume - canivete com 5mm) e quatro doses de nitrogênio (0, 50, 100 e 150 kg ha–1 de N). A fonte de N utilizada foi a ureia (45% de N), sendo realizadas distribuições manuais a lanço dois dias após a desfolha. Quando os grãos estavam perceptíveis ao tato - 10% de granação (estádio R5.1) foram avaliadas a altura das plantas, teor de clorofila, área foliar e matéria seca aérea. Na colheita foram determinados a inserção do primeiro legume, número de legume, número de grãos por legume, massa de mil grãos, produtividade e o teor de proteínas dos grãos. A adubação nitrogenada não teve a capacidade de amenizar o efeito da desfolha na cultura da soja, independentemente do nível de desfolha e das doses de N na aplicação. Níveis de desfolhas a partir de 30% durante a formação do legume (canivete com 5mm) culminaram na redução da área foliar, matéria seca da parte aérea, altura de plantas, número de legumes por planta, número de grãos por legume, massa de mil grão, produtividade dos grãos e o teor de proteína dos grãos.
BIOAVAILABLE FORMS OF HEAVY METALS FROM RICE SAMPLES AND ITS POTENTIAL HEALTH RISK ASSESSMENT
Authors:   Department of Environmental Sciences, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, 641003, India, Dhevagi Periyasamy , Ramya Ambikapathi ,   Department of Environmental Sciences, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, 641003, India, Sindhuja Murugaiyan ,   Department of Environmental Sciences, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu, 641003, India, Priyatharshini Sengottiyan ,   Department of Crop Management, Vanavarayar Institute of Agriculture, Pollachi, Tamil Nadu, 642103, India, Avudainayagam Subramanian ,   Principal, Dhanalakshmi Srinivasan Agriculture College, Thuraiyur Road, Permbalur -621212
Published: March 2021

Food crops grown in contaminated soils have a greater accumulation of heavy metals and the consumption of food crops grown in the contaminated soils are the source of metals that enters into the human body. Rice being a major food crop, the presence of heavy metals should be monitored regularly for reducing health risk. The analysis of total heavy metal always overestimates the content which leads to misinterpretation of results; however, bioaccessible heavy metal analysis projects the actual health risk. Hence, the present study aims to assess the bioavailable form of heavy metals in rice. The rice samples were collected from 20 different places and used for the inherent and bioavailable metal estimation. In vitro simulated digestion method was applied for bioaccessible metal analysis. Metal concentration in polished rice ranged from 0.10 to 0.82, 0.10 to 1.07, 0.11 to 0.56 and 0.23 to 1.09 mg kg-1 for Lead (Pb), Nickel (Ni), Cadmium (Cd) and Chromium (Cr), respectively. Twenty five percent of the samples recorded less than 0.028, 0.01, 0.01, and 0.03 mg kg-1 of bioaccessible Pb, Ni, Cd, and Cr, respectively. A significant negative correlation was observed between total metal concentration and bioaccessibility percentage. Targeted Hazard Quotient (THQ) of all the metals were less than one for adults indicating that there were no health risks, which undoubtedly reveals the importance of bioaccessible metal analysis. Hence, regular monitoring of heavy metals is essential to reduce the intensive accumulation in the human food chain. Also, the present study has opened up a wide scope on human health risk assessment using an in vitro digestion model.
EFFECTS OF CULTIVATION SYSTEMS AND CULTIVARS ON GROWTH AND YIELD PERFORMANCE OF JAPANESE EGGPLANT IN THAILAND
Authors:   Faculty of Agricultural Technology, Songkhla Rajabhat University, Muang, Songkhla 90000, Thailand, Nooprom Karistsapol , Bueraheng Niranee ,   Faculty of Science Technology and Agriculture, Yala Rajabhat University, Muang, Yala, 95000, Thailand
Published: March 2021

In the current study impacts of different cultivation systems and Japanese eggplant cultivars on their growth and yield were determined. Four Japanese eggplant cultivars viz., ‘Fullness’, ‘Black Beauty’, ‘Wasedaimaru’ and ‘Israel’ were grown under two systems of organic and conventional cultivations from 2 April to 16 July 2018 at the Faculty of Agricultural Technology, Songkhla Rajabhat University, Muang, Songkhla. The experimental arrangement used in this study was split-plots design (SPD) within a randomized complete block design (RCBD) with four replications. Results of the study indicated that ‘Wasedaimaru’ and ‘Fullness’ were suitable for growing under the organically managed production. ‘Wasedaimaru’ grown under an organic cultivation system had a lower yield per plant at 4,444.00g than grown under conventional chemical cultivation at 6,848.40g. The organic yield was not significantly different (p≤0.05) from ‘Fullness’ grown under organic cultivation at 3,947.40g. ‘Wasedaimaru’ and ‘Fullness’ were identified as suitable cultivars for production under organic cultivation in Thailand with high yield.
IN VITRO RESPONSE BY Terminalia arjuna GENOTYPES DURING MICROPROPAGATION
Authors:   Genetics and Tree Improvement Division, Arid Forest Research Institute, Jodhpur, Rajasthan, India, Choudhary Meena , Gehlot Ashok ,   Genetics and Tree Improvement Division, Arid Forest Research Institute, Jodhpur, Rajasthan, India, Arya Sarita ,   Genetics and Tree Improvement Division, Arid Forest Research Institute, Jodhpur, Rajasthan, India, Arya Inder Dev ,   Genetics and Tree Improvement Division, Arid Forest Research Institute, Jodhpur, Rajasthan, India
Published: March 2021

Terminalia arjuna is an important tree of the medicinal and sericulture industry, commonly known as Arjun. It’s bark is rich in secondary metabolites makes this plant highly valuable in medicine industry to treat cardiovascular disease. Overexploitation due to high demand in medicine, low seed germination, limitations of the conventional method of propagation push this plant towards being endangered. To conserve germplasm of such tree species and meet the requirement in medicinal industry, some non-conventional propagation method like micropropagation has been developed. The present work highlighted the effect of three genotypes (G-1, G-2, and G-3) on tissue culture of T. arjuna situated at Jodhpur, Rajasthan, India. In vitro shoot proliferation was achieved on a modified MS medium enriched with BAP + additives. Among the tested genotypes, Genotype -1 showed maximum bud break response (100%) followed by G-3 (93.33 %) and G-2 (86.66%). Further multiplication of these shoots on modified MS medium containing BAP + NAA + additives gave 11.38±0.26 (G-1), 9.44±0.21 (G-2) and 10.22±0.32 (G-3) shoots. In vitro rooting was done by pulse treatment with IBA for 10 min prior to transfer on hormone free half strength MS medium containing 0.1% activated charcoal. Maximum in vitro rooting was obtained in G-1 (80%) followed by G-3 (71.11%) and G-2 (68.88%). In the present study, it was observed that optimum growth in all three genotypes required different doses of Plant Growth Regulator. Thus, by identifying and multiplying the best performing genotypes the gap between demand and supply of such medicinal plant can be fulfilled.
EVALUATION OF THE EFFECT OF ELEVATED CO2 ON BIOEFFICACY OF BUPROFEZIN INSECTICIDE AGAINST BROWN PLANT HOPPER, Nilaparvata lugens (STÅL)
Authors:   Department of Entomology and Agricultural Zoology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh-221005, N Srinivasa ,   Division of Entomology, Indian Agricultural Research Institute, New Delhi-110012, Chander Subhash ,   Division of Entomology, Indian Agricultural Research Institute, New Delhi-110012, Kumar Padala Vinod ,   ICAR-Research Complex for Eastern Region, Research Centre for Makhana, Darbhanga Bihar-846007
Published: March 2021

The effect of elevated CO2 (570±25ppm) on the brown plant hopper (BPH) population, rice yield parameters, and efficacy of buprofezin (0.05%) in terms of spray volume was studied in an open top chamber (OTCs) during rainy season 2017 and 2018. The pest population was observed to be higher during 2017 compared to the rainy season of 2018. Under elevated CO2, rice plants had more vegetative tillers (18%) and reproductive tillers (22.1%), but there was a decrease in 1000-seed weight (11.2%), seed number per panicle (3.91%), and grain yield (18.8%) in comparison to ambient CO2 grown rice plants. The spray volumes of 700, 600, 500, and 400 l/ha each caused higher BPH mortality under ambient CO2 compared to elevated CO2. A spray volume of 500 l/ha did not prove as effective under elevated CO2 as under ambient CO2. Lower efficacy of spray volume of 500 l/ha under elevated CO2 could be ascribed to higher canopy size under elevated CO2 due to higher tillering. Increased crop canopy size under elevated CO2 may thus require higher spray volume to ensure proper coverage. Results of the study suggested a need to revise spray volume recommendations to facilitate effective management of BPH under climate change.
Практические рекомендации по лекарственному лечению сарком мягких тканей. Рекомендации Восточно-Европейской группы по изучению сарком
Authors: Феденко А. А. , Бохян А. Ю. , Горбунова В. А. , Махсон А. Н. , Тепляков В. В.
Published: March 2021

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Практические рекомендации по лекарственному лечению рака желудка
Authors: Бесова Н. С. , Трякин А. А. , Артамонова Е. В. , Болотина Л. В. , Калинин А. Е. , Кононец П. В. , Лядов В. К. , Малихова О. В. , Неред С. Н. , Проценко С. А. , Рябов А. Б. , Стилиди И. С. , Тер-Ованесов М. Д. , Хомяков В. М.
Published: March 2021

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Human-Derived Environmental Consequences for Three Sedimentary Systems of The Canary Islands (Spain) – a Study of Changes and Impacts: a Synthesis
Authors: Santana Cordero A.M.
Published: March 2021

This paper explores the relationship in three sedimentary systems of the Canary Islands (Spain) between four major land change processes (resource extraction, urbanization, tourism and nature protection) and six main environmental consequences (impacts on aeolian sedimentary dynamics, changes in sand landforms, disappearance of sand landforms and entire systems, changes in vegetation, impacts on the socioeconomic system, and changes in land use patterns). The results show that all the environmental consequences have impacted all three study sites, except in one of them (La Graciosa island) in producing disappearance of sand landforms and entire systems. It should be noted that the environmental consequences described concerns different scales (from entire systems to landforms). All the impacts are described and analyzed separately, and the results are discussed in detail and in relation to the presence of these environmental consequences in other parts of the world.
Development of Online Learning Material for Data Science Programming Using 3D Puzzle
Authors:   the Department of Human-Oriented Information Systems Engineering, Kumamoto College, National Institute of Technology, Koshi, Japan, Yamamoto Naoki , Ishida Akio , Ogitsuka Kazuki , Oishi Nobuhiro , Murakami Jun
Published: March 2021

In multidimensional data processing, one of the important data structures is a higher-order tensor or a multidimensional array. In general, the processing related to the higher-order tensor is so complicated that we have been developing understanding support tools for it using 3D puzzles from the viewpoint of making students interested. However, although these tools have been tried by students in graduation studies and other some occasions, their introduction into lectures was one issue. Therefore, in this study, we developed a new programming exercise material for the higher-order tensor, which is supposed to be used in data science subjects, by using a 3D puzzle. This learning material is also composed of Microsoft Teams, and students can access the material remotely to learn programming. In this paper, several students actually tried this material. As a result, it was found that the students themselves could create and submit assignment reports by viewing explanatory videos and performing exercises. From this, it is expected that this material will be able to introduce to data science courses, including online use.
De las Juntas Republicanas a la Unión Republicana. Colombia 1908-1910
Authors: Monroy Hernández Claudia Liliana , Acuña Rodríguez Olga Yanet
Published: March 2021

El propósito de este artículo es comprender el origen y la naturaleza de las Juntas Republicanas en Colombia entre 1908 y 1910, creadas entre líderes del liberalismo y del conservatismo en oposición al gobierno de Rafael Reyes, estableciendo una red de información y comunicación, que por una parte se unía para cuestionar la labor del gobernante, mientras se diseñaban actividades para las elecciones de 1909, en las que se debían elegir senadores y representantes. Entre estos líderes circularon ideas de conciliación y tolerancia política, democracia, antiautoritarismo, progreso y modernización del país, que motivaron la salida del presidente Rafael Reyes en 1909, y la consolidación de un proyecto político alternativo denominado “Unión Republicana”. La red de información y comunicación o sociabilidad política permitió establecer vínculos que se consolidaron entre los diversos actores a través de la prensa, la correspondencia, libros y revistas, en la defensa de un proyecto de conciliación, tolerancia y modernidad política.
Competitiveness: Conceptual approaches and research levels
Authors:   Stolypin Volga Region Institute of Administration of the Russian Presidential Academy of National Economy and Public Administration, Rud Evgeni M.
Published: March 2021

Introduction. Currently, the term “competitiveness” is firmly established in scientific literature and professional usage. It has become the subject of various methodological, theoretical and applied research. In literature, one can find different approaches to analyzing the problems of economic content of competitiveness. This is primarily due to the fact that as the market economy developed, the very category of “competitiveness” was interpreted by scientists basing on their own understanding of the current situation, the purpose and objectives of the study. This led to its overly wide use, when the concept of competitiveness was often not applied in its essence. Therefore, the relevance of this study is obvious. Theoretical analysis. The article summarizes various conceptual approaches used in economic science in the study of the category of “competitiveness”. Results. The concept of the “competitiveness” category is clarified, the levels of competitiveness research are considered, and their relationship is shown.
Case report of chondrosarcoma of the larynx
Authors:   Samara State Medical University,  Samara, 443079, Russia, Makhonin A. A. ,   Samara Regional Clinical Oncological Dispensary,  Samara, 443031, Russia, Vladimirova T. Yu. ,   Samara State Medical University,  Samara, 443079, Russia, Gabrielyan A. G. ,   Samara State Medical University,  Samara, 443079, Russia, Sinotin A. I. ,   Samara Regional Clinical Oncological Dispensary,  Samara, 443031, Russia, Bakanova Yu. G. ,   Samara Regional Clinical Oncological Dispensary,  Samara, 443031, Russia, Belyanina M. S. ,   Samara Regional Clinical Oncological Dispensary,  Samara, 443031, Russia, Ganina K. A. ,   Samara State Medical University,  Samara, 443079, Russia
Published: March 2021

The chondrosarcoma of the larynx is a poorly understood and rare malignant tumour. It accounts for only 1% of malignant neoplastic pathology of the larynx, but at the same time it is the most common non-epithelial neoplasm of the larynx. More often occurs in the area of the cricoid cartilage, namely the inner plate, less often in the area of the vocal folds and the epiglottis. There are no clinical guidelines for the treatment of chondrosarcoma of the larynx, therefore each clinical case describing clinical observations of this rare tumour is of interest. A clinical case of chondrosarcoma of the larynx is presented in a 55-year-old man who complained of hoarseness for 3 months. The patient underwent a complete clinical and instrumental examination, but computed tomography (CT) is of the greatest value. According to CT data, a calcified mass is visualized in the cricoid cartilage. At the first stage, the patient underwent resection of the cricoid cartilage in order to verify the diagnosis. Histological examination: low-grade chondrosarcoma. At the second stage, a radical surgical treatment was performed - laryngectomy. 8 months after the operation, the patient has no data on the relapse and progression of the disease according to the survey data. Currently, total laryngectomy is preferred for patients with recurrent low-grade chondrosarcoma. However, a literature review and our case show that the inability to restore the cricoid cartilage of the larynx, which is affected in most cases, often leads to laryngectomy
tendências ideológicas dos cursos de licenciatura em educação física na modalidade a distância
Authors: Pimentel Fernanda Cruvinel , Moraes Raquel de Almeida
Published: March 2021

Nesta pesquisa foram investigadas as tendências ideológicas dos cursos de licenciatura em Educação Física a distância no estado de Goiás, tendo o materialismo histórico-dialético como princípio metodológico orientador. Para a coleta de dados, foram utilizadas as técnicas da pesquisa bibliográfica, documental e entrevista semi-estruturada. Como conclusão, percebe-se que a formação na IES privada é primordialmente voltada para a empregabilidade e a IES pública, por precarizar a atuação docente, dentre outras questões estruturais, através da política da UAB, dificulta uma ação formativa mais emancipadora. Logo, o problema não é a modalidade a distância em si, mas o fato que sob o domínio do capital, a EAD se torna um negócio muito lucrativo, comprometendo a qualidade da educação.
Workshop Pembuatan Video Pembelajaran Matematika dengan Menggunakan Aplikasi Bandicam
Authors: Fajriah Noor , Sumartono Sumartono , Budiarti Indah , Normarisda Ellina
Published: March 2021

Video pembelajaran matematika diperlukan dalam pembelajaran daring untuk mengoptimalkan kemampuan peserta didik. Tujuan diadakannya workshop adalah memotivasi guru matematika membuat video pembelajaran matematika dengan menggunakan aplikasi bandicam. Workshop diadakan secara daring dengan metode sinkronus dan asinkronus dari tanggal 22-30 Oktober 2020. Peserta adalah guru matematika yang tergabung dalam MGMP MTs dan MA se-Kota Banjarmasin sebanyak 29 orang. Guru yang sudah sering membuat video pembelajaran sederhana sangat antusias karena video yang dihasilkan dengan menggunakan aplikasi bandicam menampilkan wajah guru yang berbicara. Kegiatan workshop ini mendapat respon di kriteria sangat baik untuk keempat aspek yang dinilai yaitu materi, narasumber, durasi dan media penyampaian serta guru dapat membuat video pembelajaran matematika. Peserta disarankan menggunakan konteks etnomatematika yaitu dengan memasukkan budaya Banjar pada pembuatan video pembelajaran matematika agar lebih bermakna. Beberapa guru telah berhasil membuat video pembelajaran matematika kemudian menguploadnya ke youtube.Mathematics learning videos are needed in online learning to optimize students' abilities. The purpose of holding the workshop is to motivate mathematics teachers to make mathematics learning videos using the Bandicam application. The workshop was held online with synchronous and asynchronous methods from 22 to 30 October 2020. Participants were 29 math teachers who are members of the MGMP MTs and MA in Banjarmasin City. Teachers who have often made simple learning videos are very enthusiastic because the videos produced using the Bandicam application show the face of the teacher speaking. This workshop activity received a very good response in the criteria for the four aspects assessed, namely material, resource persons, duration and media of delivery, and the teacher could make mathematics learning videos. Participants are advised to use an ethnomathematics context, namely by including the Banjar Culture in making mathematics learning videos to make them more meaningful. Some teachers have succeeded in making mathematics learning videos and then uploading them to YouTube.
Real-Time Prediction of Mud Motor Failure Using Surface Sensor Data Features and Trends
Authors: Lawal Tesleem , Ashok Pradeepkumar , van Oort Eric , Zheng Dandan , Isbell Matthew
Published: March 2021

Mud motor failure is a significant contributor to non-productive time in lower-cost land drilling operations, e.g. in North America. Typically, motor failure prevention methodologies range from re-designing or performing sophisticated analytical modeling of the motor power section, to modeling motor performance using high-frequency downhole measurements. In this paper, we present data analytics methods to detect and predict motor failures ahead of time using primarily surface drilling measurements.

We studied critical drilling and non-drilling events as applicable to motor failure. The impacts of mud motor stalls and drill-off times were investigated during on-bottom drilling. For the off-bottom analysis, the impact of variations in connection practices (pick up practices, time spent backreaming, and time spent exposing the tools to damaging vibrations) was investigated. The relative importance of the various features found to be relevant was calculated and incorporated into a real-time mud motor damage index.

A historical drilling dataset, consisting of surface data collected from 45 motor runs in lateral hole sections of unconventional shale wells drilled in early to mid-2019, was used in this study. These motor runs contained a mix of failure and non-failure cases. The model was found to accurately predict motor failure due to motor wear and tear. Generally, the higher the magnitude of the impact stalls experienced by the mud motor, the greater the probability of eventual failure. Variations in connection practices were found not to be a major wear-and-tear factor. However, it was found that connection practices varied significantly and were often driller-dependent.

The overall result shows that simple surface drilling parameters can be used to predict mud motor failure. Hence, the value derived from surface sensor information for mud motor management can be maximized without the need to run more costly downhole sensors. In addition to this cost optimization, drillers can now monitor motor degradation in real-time using the new mud motor index described here.
Synthesis of T785
Authors: Safina Brian , Lee Art
Published: March 2021

Chemical synthesis procedure and methods for T785 small molecule
Effect of metal decoration on sulfur-based gas molecules adsorption on phosphorene
Authors: Wang Yonghu , Lei Shuangying , Gao Ran , Sun Xiaolong , Chen Jie
Published: March 2021

Using the first-principles calculation based on density functional theory (DFT), we systematically studied the adsorption of sulfur-based gas molecules (H2S, SO2, SO3) on various metal-decorated phosphorenes. To avoid the formation of metal clusters on the surface of phosphorene, eleven metals (Li, Na, K, Rb, Cs, Ca, Sr, Ba, Ni, La, Tl) with bulk cohesive energy less than the binding energy on the phosphorene are considered. Except for H2S on Tl-decorated phosphorene, all metal decorations can improve the adsorption strength of phosphorene to sulfur-based gas molecules, and Eads(H2S) < Eads(SO2) < Eads(SO3) for the same metal decoration case. In addition, some metal-decorated phosphorene systems exhibit interesting magnetic and electrical changes after sulfur-based gas molecule adsorptions, indicating that these metal-decorated phosphorene systems are promising to be used for the detection and removal of sulfur-based gas molecules.
Disparity in health-related quality of life between kidney transplant recipients and hemodialysis patients, and related implications for physical rehabilitation: A cross-sectional study
Authors: Sarhan Adnan L , Jarareh Raya H , Shraim Mujahed
Published: March 2021

Background

Health related quality of life (HRQOL) is an important indicator of medical treatment and is a strong predictor of disability and mortality. The literature has shown mixed evidence about whether kidney transplantation improves HRQOL compared with other renal replacement modalities. The aim of this study was to compare the HRQOL in kidney transplant recipients (KTRs) and hemodialysis (HD) patients.
Methods

A cross-sectional study of 100 KTRs and 272 HD patients from two central kidney units in West Bank, Palestine. The HRQOL was assessed using the Short Form-36 Health Survey. Multivariable linear regression was used to estimate differences in mean HRQOL scores between KTRs and HD patients.
Results

After accounting for sociodemographic variables, KTRs had higher clinically important differences than HD patients in HRQOL mean scores in role-physical, bodily pain, general health, vitality, social functioning, role-emotional, mental health, physical and mental component summaries ranging from 15.5 points for social functioning (95% CI 10.1, 20.7) to 34.3 points for general health (95% CI 28.7, 39.9). However, unexpectedly, KTRs had significantly lower HRQOL physical functioning than HD patients by 24.5 points (95% CI 18.7, 29.9).
Conclusions

Kidney transplantation is associated with important improvements in most aspects of HRQOL but also with noticeably poor physical functioning. HRQOL among KTRs should be routinely measured and closely monitored in clinical settings. KTRs should be encouraged to participate in individually tailored physical exercise programs. Identification and elimination of barriers to physical functioning may improve HRQOL and prevent premature mortality among KTRs.
Analysis of a Mass-Spring-Relay System With Periodic Forcing
Authors: Lelkes János , KALMÁR-NAGY Tamás
Published: March 2021

The dynamics of a hysteretic relay oscillator with harmonic forcing is investigated. Periodic excitation of the system results in periodic, quasi-periodic, chaotic and unbounded behavior. A Poincare map is constructed to simplify the mathematical analysis. The stability of the xed points of the Poincare map corresponding to period-one solutions is investigated. By varying the forcing parameters, we observed a saddle-center and a pitchfork bifurcation of two centers and a saddle type xed point. The global dynamics of the system is investigated, showing discontinuity induced bifurcations of the xed points.
Shell Crystallization in Granular Hopper Flow
Authors: Zhang Sheng , Lin Ping , Wang Mengke , Wan Jiang-Feng , Peng Yi , Yang Lei , Hou Meiying
Published: March 2021

An interesting phenomenon that a layer of crystallized shell formed at the container wall during hopper flow is observed experimentally and is investigated in DEM simulation. Different from shear or vibration driven granular crystallization, our simulation shows during the hopper flow the shell layer is formed spontaneously from the stagnant zone at the base and grows at a constant rate to the top with no external drive. The growth rate of the shell is found linearly proportional to the rate of the hopper flow. This shell is static and served as a new wall, which changes the flow profiles and its stress properties, and in turn guarantees a constant flow rate.
Inactivation of the Wnt/β-catenin signaling contributes to the epithelial barrier dysfunction induced by sodium oxalate in canine renal epithelial cells
Authors: Ji Yun , Fang Shuting , Yang Ying , Wu Zhenlong
Published: March 2021

Background

Nephrolithiasis (also known as renal stones) is a common disease condition in companion animals, including dogs and cats. Dysfunction of renal tubular epithelial cells involves in the pathogenesis of renal stones. However, a functional role of Wnt/β-catenin signaling and its contribution to nephrolithiasis remains unknown.
Results

In the present study, we found that Mardin-Darby canine kidney (MDCK) cells treated with sodium oxalate resulted in reduced cell proliferation and migration, which was associated with the G0/G1 phase arrest of cell cycle progression. In addition, sodium oxalate exposure led to decreased transepithelial electrical resistance (TEER) and increased paracellular permeability. The deleterious effect of sodium oxalate on epithelial barrier function was related to decreased protein abundances of claudin-1, occludin, zonula occludens (ZO)-1, ZO-2 and ZO-3. Of note, protein levels of p-β-catenin (Ser552) in MDCK cells were repressed by sodium oxalate, indicating an inhibitory effect on the Wnt/β-catenin signaling. Intriguingly, SB216763, a GSK-3β inhibitor, enhanced the expression p-β-catenin (Ser552), and protected against epithelial barrier dysfunction in sodium oxalate-treated MDCK cells.
Conclusion

Taken together, our results revealed a critical role of Wnt/β-catenin signaling on the epithelial barrier function of MDCK cells. Activation of Wnt/β-catenin signaling might be an potentially therapeutic target for the treatment of renal stones in animals.
A new Plasmodium falciparum field isolate from Benin in continuous culture: Infectivity of fresh-produced and cryopreserved gametocytes to Anopheles gambiae
Authors: Medjigbodo Adandé A. , Acquah Festus K. , Djossou Laurette , Amoah Linda E. , Ouendo Edgard-Marius , Weetman David , Donnelly Martin J. , Djogbenou Luc S.
Published: March 2021

Transmission-blocking vaccines and drugs are likely to be key interventions in efforts to achieve malaria elimination. However, transmission-blocking studies are reliant upon a limited number of culture-adapted strains of Plasmodium falciparum with limited genetic variability, or on field isolates which are only maintained transiently in the laboratory and therefore not amenable to replication studies. Herein, we investigated the gametocytogenesis capacity and infectivity to Anopheles gambiae mosquitoes of a P. falciparum field isolate collected from a malaria patient from Benin compared to those of NF54 strain. The intraerythrocytic developmental cycle (IDC) was similar in both P. falciparum strains (ranges of parasitaemias were respectively 0.02–11.53% and 0.035–10.5% throughout twelve days of culture). The culture-adapted parasites displayed a significant higher infectivity to An. gambiae compared to that of NF54 (mean oocyst prevalence and intensity: 16.94%, CI95%= [15.15–18.73] vs. 3.13%, CI95%= [2.30–3.96], p < 0.0001 and 3 vs. 1 oocysts/infected mosquito, p = 0.002 respectively). Even after cryopreservation for up to 14 days, gametocytes from the field isolates were capable of infecting An. gambiae mosquitoes at a prevalence of up to 30% with an average of 12 oocysts/ midgut. This new P. falciparum strain will enhance malaria transmission-blocking studies in endemic countries.
The effect of SOX17, MACC1 and c-Met expression in ESCC on prognosis
Authors: Shi Yan , Li Chao , Li Mengyan , Abulajiang Gulinaer , Wang Hui , Su Liping , Liu Wenying , Xu Shanshan , Zhang Wenjing , Ma Yuqing
Published: March 2021

Aim: We mainly explored the expression of SOX17, MACC1 and c-Met in esophageal squamous cell carcinoma and their influence on the prognosis of patients.Methods：Expressions of SOX17, MACC1 and c-Met protein in a sample of 232 ESCC and adjacent nontumorous tissues were detected by immunohistochemistry. Their relationships and correlations with clinicopathological features and clinical prognosis were analyzed by SPSS 23.0.Results：SOX17 was associated with Vascular invasion (p=0.017) and Nerve invasion (p=0.014). MACC1 was correlated with Tumor size (p=0.039) and TNM stage (p=0.020).c-Met was significantly associated with hematogenous metastasis (p=0.045). The expression of MACC1 was correlated with c-Met (P<0.001). c-Met expression(p=0.021) were associated with OS. Conclusion: SOX17, MACC1 and c-Met may be new diagnostic targets for esophageal squamous cell carcinoma. c-Met may be a new therapeutic and prognostic target.
Use of WhatsApp®, a Simple and Widely Distributed Social Media, for Distance Teaching during COVID-19 Pandemic: Experience and Perception from a Sub-Saharan African Setting
Authors: Enyama Dominique , Balti Eric Vounsia , Njonnou Sylvain Raoul Simeni , Ouankou Christian Ngongang , Lekpa Fernando Kemta , Njinkui Diomede Noukeu , Fouogue Jovanny Tsuala , Kouam Jeanne Mayouego , Njateng Guy Sedar Singor , Kenfack Bruno , Watcho Pierre , Choukem Simeon Pierre
Published: March 2021

Background: In the midst of the COVID-19 pandemic, to palliate to the lockdown and cover academic programs, the Faculty of Medicine and Pharmaceutical Sciences of the University of Dschang (FMPS-UDs) in Cameroon has implemented e-learning using WhatsApp®. We aimed to describe the opinion of students and lecturers about it after its implementation at the FMPS-UDs.Methods: We designed a uniform scheme to teach using WhatsApp® during the university lock-down, and both the students and the teaching staff of the FMPS-UDs received clear information on the implementation. At the end of the online-teaching period of two and a half months prior to the reopening of the university, we surveyed our students and teaching staff. Sociodemographic characteristics and opinions about e-learning were collected using a standard questionnaire. Results: We enrolled 229 students and 40 lecturers of the FMPS-UDs. Students reported a poorer internet connection (p<0.001, p-homogeneity< 0.001) despite an increased expenditure related to internet use. Electronic devices were broadly used before the implementation of mobile learning. The use of course materials was more challenging among students because of the size/format of lecture notes and the internet connection/cost (all p<0.05). Perception of discipline compared to classroom-based lessons was similar in students and lecturers (all p>0.05). While lecturers were mainly [n(%)=16(40%)] more comfortable conveying the contents of their lectures, students tended to be less prone to actively participate [n(%)=137(59.8%)]. The motivation and satisfaction of the latter group toward e-learning were modest compared to classroom-based lectures while their feedback about the organization was positive. Conclusion: E-learning using WhatsApp® could be an effective alternative to conventional classroom-based lessons in SSA. The use of a blended-learning program including classroom-based sessions could help improve its limitations.