bluuebunny/crossref_metadata_2025 huggingface dataset:
Promoção do desenvolvimento sustentável escolar através da educação ambiental
Authors: Nóbrega Camila Costa da , Ribeiro Danilo Ravel , Silva Jamylles Soares da , Miranda Vivian Gabriela de Souza
Published: July 2020

Os problemas ambientais são recorrentes no nosso dia a dia, para isso, são necessárias medidas que possam mitigá-los. A educação ambiental vem como maneira de amenizar os impactos ao meio ambiente através da conscientização das pessoas com medidas socioambientais. O objetivo do projeto foi a conscientização da importância da educação ambiental na escola, com a missão de mobilizar toda comunidade estudantil, demonstrando através de ações, maneiras de diminuir as agressões ao meio ambiente. As atividades foram realizadas na Escola Estadual Professor Pedro Augusto Porto Caminha, localizada no bairro do Jaguaribe, da cidade de João Pessoa. Foram realizadas palestras e oficinas para toda a comunidade escolar para abordar a importância do cuidado com o meio ambiente. Além de proporcionar a consciência ambiental e uma sensibilização maior com a natureza, o projeto também teve como objetivo diminuir a problemática dos resíduos sólidos por meio da coleta seletiva, os resíduos secos foram doados aos catadores, e uma outra parte foi reutilizada na criação do jardim vertical. Quanto aos resíduos orgânicos, foram aplicados na compostagem para a produção de nutrientes para as plantas. Desta forma, auxiliando na construção de uma escola mais sustentável e pluralista capaz de trabalhar em conjunto, promovendo o bem-estar e a qualidade de vida de todas as pessoas que compartilham daquele espaço.
Instrumentos de avaliação de intenção empreendedora: uma revisão de literatura
Authors: Cortez Pedro Afonso , Filho Nelson Hauck
Published: July 2020

Modelos de intenção empreendedora ajudam na compreensão das crenças individuais relacionadas a iniciar o próprio negócio em um futuro próximo. Embora ainda recente na literatura brasileira e focada na Teoria do Comportamento Empreendedor Planejado entre universitários na literatura latino-americana, a avaliação da intenção empreendedora tem sido conduzida utilizando diversos instrumentos psicométricos em contextos norte americanos e europeus. Uma questão de interesse, no entanto, é se essas ferramentas possuem definição conceitual apropriadamente fundamentada e propriedades psicométricas robustas para utilização. Para contribuir a essa questão, o presente estudo objetivou identificar os instrumentos de intenção empreendedora apresentados nas bases Web of Science e Scielo e descrever as bases teóricas
e as propriedades psicométricas desses instrumentos. Buscas nas bases de dados Web of Science e Scielo utilizando o descritor “intenção empreendedora” em português, inglês e espanhol permitiram localizar 676 artigos que, mediante a aplicação de critérios de inclusão e exclusão, resultaram na identificação de 13 distintos instrumentos de mensuração de intenção empreendedora entre os anos de 1993 e 2019. Dentre essas ferramentas, quatro escalas baseadas na teoria do Comportamento Empreendedor Planejado demonstraram definição conceitual apropriadamente fundamentada e níveis razoáveis de evidências de validade para a estrutura interna e consistência interna para avaliação de intenção empreendedora. Considera-se que esses instrumentos são os melhores candidatos a adaptações transculturais ao Brasil e
América Latina ou mesmo para inspirar novas medidas sobre o tema nesses contextos, tendo em vista a adequação teórica e propriedades psicométricas apresentadas na corrente revisão.
Application of the Dynamic Compaction Method for Ground Improvement of Collapsible Loess in Qinhai
Authors: CAI Jun , ZHANG Jingtao , DU Guangyin , XIA Han
Published: July 2020

The collapsibility of loess has a great influence on subgrade construction in Qinghai, China, so laboratory tests are utilized to evaluate the collapsibility influencing factors, which illustrates that the collapsibility of this region is not dominated by soluble salts but an alkaline environment, high porosity and a low water content. The in situ self-weight submerging test reveals the settlement regularities, with a maximum settlement of 22.4 cm, which suggests that the soil in the test region is self-weight collapsible loess. In consideration of the economy and applicability, dynamic compaction was chosen as the ground improvement method. The optimal number of drops (N) for an energy level of 1000 kN·m is 6, and for the energy levels of 1500 kN·m and 2000 kN·m, N is 8. Besides the maximum effective depth for 1000 kN·m is 5 – 6 m, and it is 6 – 7 m for 1500 kN·m and 2000 kN·m.
The Strain Sensitivity of Coal Reinforced Smart Concrete by Piezoresistive Effect
Authors: KOLATAR Özkan , TEOMETE Egemen , KAHRAMAN Serap
Published: July 2020

The structures are challenged by earthquakes, material degradations and other environmental factors. In order to protect the lives, assets, and for maintenance planning, structural health monitoring (SHM) is important. In SHM applications, strain gages are widely used which have low durability, low sensitivity while they have high cost. To monitor a structure, large number of strain gages have to be used that increases the cost. In this study, seven coal reinforced concrete mixtures with 0, 0.35, 0.5, 0.8, 1, 1.5 and 2 volume % of coal were designed; three cubic samples for each mixture were fabricated. Simultaneous strain and electrical resistance measurement of the samples during the compression test was conducted. A strong linear piezoresistive relationship between strain and electrical resistance change with a correlation coefficient of 0.99 was determined. The concrete mixture having 0.8 volume % coal had the highest strain sensitivity of K=44, which was 22 times the strain sensitivity of commercial metal strain gages while it had a linearity error of LE=6.9% that was low. This mixture with 0.8 volume % coal is a candidate to be smart concrete which can sense its strain. As a contribution to the literature, a phenomenological model for the relationship between gage factor and coal volume % was explained in details. The multifunctional smart concrete will be used as a smart material, which can sense its strain in SHM applications while acting as a load bearing material.
O REAL E O IMAGINÁRIO NA OBRA DE LÚCIA MURAT: Apontamentos iniciais de uma pesquisa
Authors: Silveira Lívia Pizzi
Published: July 2020

Este artigo tem por proposta apontar os passos iniciais de uma pesquisa acadêmica, a fim de compreender a produção cinematográfica da cineasta Lúcia Murat, a partir de sua própria vida, captando sua relação com a realidade, além de situar o leitor sobre o surgimento do cinema e a relação entre ficção e documentário. Para tal, utilizará de leituras e análises de diversas obras e meios audiovisuais. Lúcia foi uma mulher militante, que acabou presa e torturada pelo regime militar brasileiro (1964 1985) e, após ser liberta, usou de sua memória e experiências pessoais para contar histórias em seus longas metragens.
Analysis on the Promotion Path of Teaching Competence of Tourism Vocational Education Teachers from the Perspective of Industry-Education Integration
Authors: Fan Zongjian , Lu Lamei
Published: July 2020

To improve the level of teaching skill and professional knowledge reserve of tourism teachers in higher vocational colleges, it is necessary to improve the teaching competence of tourism vocational education teachers from the perspective of industry-education integration. In addition, the significant improvement of teachers' teaching quality is related to the effective improvement of teaching ability, the development of teachers' professional quality, and the cultivation of students' professional quality and sustainable development ability. Based on the research perspective of industry-education integration, this paper analyzes the common problems existing in vocational education teaching of teachers in higher vocational colleges, and points out the specific ways to improve the competence of tourism vocational teachers, in order to provide scientific theoretical basis for the long-term development of tourism vocational education.
Research on Teaching Management and Teaching Mode Innovation and Practice in Software Technology Specialty
Authors: Pan Duo
Published: July 2020

In the software technology professional training, the object is mainly high-quality technical personnel in the area of software development and management, and they provide service in the first line. They have the basic knowledge and professional skills needed for software development and management positions. Although some colleges and universities have made some progress in the reform of software technology specialty, they are still faced with some problems such as difficult implementation, unsystematic reform methods and measures. This is not only an important task in the study of software technology major, but also an operational teaching method. In the following parts, the current situation of software technology teaching in higher vocational colleges is emphatically discussed, so as to lead to the teaching mode of software technology talents training in higher vocational colleges, as well as the teaching methods combining teaching, learning and practice.
Current Situation and Prospect of Digital Media Art
Authors: Wang Wenping
Published: July 2020

At present, with the rapid development of science and technology, especially computer technology, China's digital media art has a huge space for development and creation prospects. Digital media art has changed the cultural value of human beings to some extent and influenced the traditional artistic creation of human beings.Since the birth of digital media art, it has triggered various discussions in the society. Digital media art integrates human rational thinking and perceptual thinking into one body and becomes a new art form. The development of digital media art has attracted worldwide attention. This paper focuses on the current situation of the development of digital media art in China and discusses its future development direction
Research on the Practical Teaching System based on the Workshop Model under the Background of New Engineering
Authors: Wen Wen , Fang Wang
Published: July 2020

In recent years, the practical teaching mode based on the new engineering background has become more diversified, among which the workshop mode is more widely used than other modes. This paper deeply analyzes the development of practical teaching realized by using the workshop model in the new engineering background, and highlights the advantages of choosing the workshop as the practical teaching model.
Development of Secretarial Science and Administration in the New Period
Authors: Zhang Chi
Published: July 2020

Domestic secretarial science and administrative management has a history of more than 40 years of development and has made great achievements. Although the characteristics of these two subjects are similar, their development process and current situation are quite different. In reality, the degree to which a discipline can solve practical problems determines its development status. Therefore, the development of any subject should be based on the solution of practical problems. Only in this way can the significance of research be highlighted, and the research ability be strengthened, and the tolerance, influence and explanatory power of disciplinary theories be improved better. This paper focuses on the development direction and target of secretarial science and administrative management in the new period.
On the Innovation of Journalism Practice Teaching in the Media Convergence Environment
Authors: Zhang Ruikun , Shen Chunpeng
Published: July 2020

The current media environment has undergone great changes, which benefit from the continuous development of Internet technology. The gap between different media is gradually being eliminated, and the concept and approach of news transmission have also undergone tremendous changes. With the integration of different media, the way of news dissemination also changes. In the current education of journalism and communication in China, the most obvious feature is the practicability of journalism practice. This paper mainly discusses the innovation and change of journalism practice teaching under the media convergence environment.
On the Current Situation of Computer Language Teaching and its Reform Measures
Authors: Zheng Yujie
Published: July 2020

With the continuous development of information technology, the application of computer has been involved in people's production, life, study, work and other aspects, affecting the public life more and more widely. In order to continue to provide the society with sufficient computer application talents, computer education came into being, and the promotion of computer education has become inevitable. As a major part of computer courses, computer language courses have become an important subject in computer teaching in colleges and universities, but there are still many problems in practical teaching. Therefore, this paper analyzes the existing problems in computer language teaching and tries to put forward some solutions, so as to provide reference for the sustainable development of computer education in the future.
Research on the Design Innovation of Themed Party Day Activities of Grassroots Party Organizations in Colleges and Universities
Authors: Zhou Yong , Chen Siqi
Published: July 2020

As is known to all, science and technology is the first productive force. As the "base camp" for cultivating talents, colleges and universities should pay more attention to innovation. Grassroots party organizations in colleges and universities invest a lot of manpower and material resources in organizing innovative thematic party day activity, the purpose of which is to guarantee the thematic party day activity can realize dual innovation on form and content, to motivate party members in colleges and universities to actively take part in. As they are talents and newly-emerging force cultivated by colleges and universities, they are capable of accomplishing works of universities. Therefore, the theme of the party day activities should be feasible, so as to fully mobilize the enthusiasm of college party members and broaden their thinking. Such innovative activities are truly valuable activities. Therefore, activity design is particularly important. This paper conducts research and analysis on the design and innovation of themed party day activity of grassroots part organizations in colleges and universities. 
Research on the Reform of Civil Engineering Practice Teaching under the Cultivation of Innovation Ability
Authors: Guo Yibin
Published: July 2020

The reform of the current education system has put forward higher requirements on the teaching of colleges and universities. On the one hand, teachers should be responsible for teaching students‘ knowledge and improving students' cultural literacy. On the other hand, they should cultivate students' comprehensive practical ability and innovative ability. Civil engineering major is an important major to train talents for China's economic development. The educational reform of colleges and universities should constantly improve the quality of practical teaching of civil engineering and cultivate talents with strong comprehensive ability for China's economic and social development. At present, the research on the teaching reform of civil engineering is deepening, aiming at improving the quality of civil engineering teaching and promoting the reform of construction course teaching. This paper mainly studies the cultivation of students' innovation ability by the reform of civil engineering practice teaching.
Career Expectation and Professional Ability Cultivation of Students in Yuxi Normal University
Authors: Tang Jinli
Published: July 2020

With the adjustment of national education policy, China's higher education has entered the stage of popular education. Especially in recent years, the number of college graduates is on the rise and graduates employment difficulty increases. In this context, it is quite difficult for normal university students to find a satisfactory job. Therefore, it is very important for normal university students to correct their expectations of graduation in the future and strengthen the cultivation of vocational ability, which is conducive to students to clarify their career ideal on the basis of reality and further reduce the employment pressure of students.
Innovation of Experimental Teaching Mode of College Hotel Management from the Perspective of Experience Education
Authors: Pan Li
Published: July 2020

Economic globalization has promoted the cultural exchange between countries. Under the background of increasingly frequent personnel exchanges between countries, it has generated the strong demand for professionals in the hotel industry. However, many domestic colleges and universities still face many urgent problems in training hotel management talents. Therefore, the integration of experiential teaching elements into the construction of the curriculum system of hotel management major is not only conducive to the enhancement of students' active thinking and learning ability, but also beneficial to the improvement of students' practical skills and comprehensive quality. In order to cultivate outstanding hotel management talents with strong practicality,comprehensiveness and high professionalism, this article from the perspective of ubiquitous teaching situation in domestic various universities hotel management professional, through the analysis of the concept and essence of experience education, and the characteristics of the experience type teaching, points out the necessity for domestic colleges and universities hotel management professional to implement experience type teaching, and expounds the practical application of experience type teaching is of great significance to innovation hotel management teaching mode.
Legal Prevention and Dispute Settlement of Cross-Border Investment Risks of Chinese Private Enterprises under the "One Belt and One Road" Initiative
Authors: Chen Jie
Published: July 2020

With the initiative of "One Belt and One Road “and the continuous development of China area, the current domestic private enterprises in transnational investment faces some risks, and these risks are mainly concentrated in the process of overseas investment in several stages for market access, asset operations and assets withdrawal. It mainly covers the scope of the foreign capital enterprise property rights, investment, the state environmental protection, tax policy, intellectual property protection, local labor protection and capital withdrawal, etc. This paper attempts to objectively analyze the legal risks of cross-border investment of Chinese private enterprises in the “One Belt and One Road” environment, so as to establish a “One Belt and One Road” overseas transnational investment risk prevention system and conflict resolution mechanism with legal prevention as the main content.
The New Discovery of the Cause of Phubbing in College Classroom and the Correction of "Sqare"
Authors: Yong Tianrong
Published: July 2020

The phenomenon of phubber in classroom has gradually attracted the attention of academic circles in recent years. However, most scholars regard the appearance of phubber as an absolute negative phenomenon and hope to seek countermeasures to eliminate this negative phenomenon so as to improve classroom efficiency. After in-depth and detailed research, it is found that there is no positive correlation between playing mobile phones in class and life goals, and using mobile phones in class is not completely negative. Students may be doing "positive things" with mobile phones, which is relatively positive. Playing mobile phones and listening to lectures are not mutually exclusive. Based on this, the phenomenon of phubbing in class should not be simply eliminated, but guided to a more positive sense through reasonable correction. Because of its obvious practicality, SQARE teaching method can fully mobilize students' enthusiasm for classroom learning, greatly attract students' attention, and make them too busy to pay attention to mobile phones. Therefore, it is appropriate for SQARE teaching method to serve as an important corrective role.
English Translation of Chinese Neologisms from the Perspective of Ecological Translation Strategy Analysis——A Case Study on 2019 Chinese New Words
Authors: Feng Xiaoying
Published: July 2020

The rapid development of society drives the rapid development of language, and the core factor that can reflect the progress of language is vocabulary. From the perspective of ecological translation, this paper chooses the adaptive selection theory in ecological translation as the theoretical basis, and probes into the English translation strategies of Chinese neologisms in 2019 from three perspectives: communicative dimension, cultural dimension and linguistic dimension.
Uma estratégia de ensino para estimular o uso de múltiplas linguagens arquitetônicas em resposta a tecnologias digitais emergentes
Authors: Furtado Silva Neander , Maciel Furtado Silva Lilian
Published: July 2020

As novas tecnologias de projeto e de fabricação digitais têm tido um impacto reduzido na produção de uma arquitetura menos repetitiva e que explore as novas fronteiras de linguagens arquitetônicas proporcionadas por esses recursos. O ensino de arquitetura desempenha um papel significativo na reprodução deste problema. Relata-se aqui uma estratégia inovadora e única de ensino que vem sendo implementada, avaliada e aperfeiçoada há aproximadamente uma década. A ênfase desta estratégia consiste na inclusão de requisitos de linguagem arquitetônica nos programas de necessidade apresentados em um certo ateliê de projeto. Foi feita uma releitura objetiva e comparativa de dois grupos de projetos obtidos em atividades desenvolvidas em sala de aula. Após vários anos de ensino nessas premissas, os resultados são promissores.
Foreword: Racism and Health
Authors: Thorpe, Jr. Roland J.
Published: July 2020

Ethn Dis. 2020;30(3):369-372; doi:10.18865/ed.30.3.369
Building the Transdisciplinary Resistance Collective for Research and Policy: Implications for Dismantling Structural Racism as a Determinant of Health Inequity
Authors: Collective for Research and Policy The Transdisciplinary Resistance , Neely Adrian N. , Ivey Asia S. , Duarte Catherine , Poe Jocelyn , Irsheid Sireen
Published: July 2020

Structural racism is a multilevel system of ideologies, institutions, and processes that have created and reified racial/ethnic ineq­uities. As a system, it works in concert across institutions to propagate racial injustice. Thus, efforts to address structural racism and its implications for health inequity require transdisciplinary collaboration. In this article, we begin by describing the process through which we have leveraged our discipline-specific training -- spanning edu­cation, epidemiology, social work, sociology, and urban planning -- to co-construct a transdisciplinary analysis of the determinants of racial health inequity. Specifically, we introduce the underlying theories that guide our framework development and dem­onstrate the application of our integrated framework through a case example. We conclude with potential research and policy implications. Ethn Dis.2020;30(3):381-388; doi:10.18865/ed.30.3.381
Perspective: COVID-19 and African American Religious Institutions
Authors: Bruce Marino A.
Published: July 2020

Religious institutions have historically been an essential resource in African American communities and can serve as indispensable partners during a public health crisis. The purpose of this perspective is to establish African American churches, mosques, and temples as essential for an immediate, comprehensive, and sustained response to the elevated risk for and spread of COVID-19 among African Americans.Ethn Dis. 2020;30(3):425-428; doi:10.18865/ed.30.3.425
Impact of COVID-19 on Clinical Research and Inclusion of Diverse Populations
Authors: Lackland Daniel T. , Sims-Robinson Catrina , Jones Buie Joy N. , Voeks Jenifer H.
Published: July 2020

The randomized clinical trial (RCT) has long been recognized as the ‘gold standard’ for developing evidence for clinical treatments and vaccines; however, the successful imple­mentation and translation of these findings is predicated upon external validity. The generalization of RCT findings are jeopar­dized by the lack of participation of at-risk groups such as African Americans, with long-recognized disproportional representa­tion. Distinct factors that deter participation in RCTs include distrust, access, recruitment strategies, perceptions of research, and socio­economic factors. While strategies have been implemented to improve external validity with greater participation among all segments of the population in RCTs, the coronavirus disease 2019 (COVID-19) pandemic may exacerbate disparities in RCT participation with the potential impact of delaying treat­ment development and vaccine interventions that are applicable and generalizable. Thus, it is essential to include diverse populations in such strategies and RCTs. This Perspec­tive aims to direct attention to the additional harm from the pandemic as well as a refocus on the unresolved lack of inclusion of diverse populations in conducting RCTs. Ethn Dis. 2020;30(3):429-432; doi:10.18865/ed.30.3.429
Applying Community-Partnered Participatory Research Approaches to Develop COVID-19 Solutions
Authors: Wells Kenneth Brooks , Jones Felica , Norris Keith C.
Published: July 2020

Ethn Dis. 2020;30(3):433-436; doi:10.18865/ed.30.3.433
Analisis Kestabilan Model Matematika Ko-infeksi Virus Influenza A dan Pneumokokus pada Sel Inang
Authors: Anwar Abdul Faliq , Windarto Windarto , Alfiniyah Cicik
Published: July 2020

Co-infection of influenza A virus and pneumococcus is caused by influenza A virus and pneumococcus bacteria which infected host cell at the same time. The purpose of this thesis is to analyze stability of equilibrium point on mathematical model within-host co-infection of influenza A and pneumococcus. Based on anlytical result of the model there are four quilibrium points, non endemic co-infection equilibrium (E0), endemic influenza A virus equilibrium (E1), endemic pneumococcus equilbrium (E2) and endemic co-infection equilibrium (E3). By Next Generation Matrix (NGM), we obtain two basic reproduction number, which are basic reproduction number for influenza A virus (R0v) and basic reproduction number for pneumococcus (R0b). Existence of equilibrium point and local stability of equilibrium point dependent on basic reproduction number. Non endemic co-infection equilibrium is locally asymtotically stable if R0v < 1 and R0b < 1; influenza A virus endemic equilibrium is locally asymtotically stable if R0v > 1 and R0b > 1; pneumococcus endemic equilibrium is locally asymtotically stable if R0v < 1 and R0b > 1. Meanwhile, the co-infection endemic equilibrium is locally asymtotically stable if R0v > 1 and R0b > 1. From the numerical simulation result, it was shown that increasing the number of influenza A virus and pneumococcus made the number of population cell infected by influenza A virus and pneumococcus (co-infection) also increased.
Analisis Kontrol Optimal Model Matematikan Penyebaran Penyakit Mosaic pada Tanaman Jarak Pagar
Authors: Pambudi Adiluhung Setya , Fatmawati Fatmawati , Windarto Windarto
Published: July 2020

Mosaic disease is an infectious disease that attacks Jatropha curcas caused by Begomoviruses. Mosaic disease can be transmitted through the bite of a whitefly as a vector. In this paper, we studied a mathematical model of mosaic disease spreading of Jatropha curcas with awareness effect. We also studied the effect of prevention and extermination strategies as optimal control variables. Based on the results of the model analysis, we found two equilibriums namely the mosaic-free equilibrium and the endemic equilibrium. The stability of equilibriums and the existence of endemic equilibrium depend on basic reproduction number ( ). When , the spread of mosaic disease does not occur in the population, while when , the spread of mosaic disease occurs in the population. Furthermore, we determined existence of the optimal control variable by Pontryagin's Maximum Principle method. Simulation results show that prevention and extermination have a significant effect in eliminating mosaic disease.
Hybrid Artificial Neural Network with Extreme Learning Machine Method and Cuckoo Search Algorithm to Predict Stock Prices
Authors: Prabawati Piping , Damayanti Auli , Suprajitno Herry
Published: July 2020

This thesis aims to predict the stock prices, using artificial neural network with extreme learning machine (ELM) method and cuckoo search algorithm (CSA). Stock is one type of investment that is in great demand in Indonesia. The portion ownership of stock is determined by how much investment is invested in the company. In this case, stock is an aggressive type of investment instrument, because stock prices can change over time. In this case, ELM is used to determine forecasting values, while CSA is applied to compile and optimize the values of weights and biases to be used in the forecasting process. After obtaining the best weights and biases, the validation test process is then carried out to determine the level of success of the training process. The data used is the daily data of the stock price of PT. Bank Mandiri (Persero) Tbk. the total is 291 data. Furthermore, the data is divided into 70% for the training process is as many as 199 data and 30% for the validation test as many as 87 data. Then compiled pattern of training and validation test patterns is 198 patterns and 82 patterns. Based on the implementation of the program, with several parameter obtained the result of  MSE training is 0.001304353, with an MSE of validation test is 0.0031517704. Because the MSE value obtained is relatively small, this indicates that the ELM-CSA network is able to recognize data patterns and is able to predict well.
CARACTERIZAÇÃO DE FEIÇÕES MORFOLÓGICAS NO CANAL DO RIO JAGUARIBE: TRECHO LIMOEIRO DO NORTE-QUIXERÉ
Authors: De Sousa Coelho Gerliane Kelly , Andrade José Hamilton Ribeiro
Published: July 2020

Os sucessivos eventos de erosão, transporte e deposição de sedimentos que ocorrem nos rios proporcionam a formação e evolução de feições morfológicas no canal e na planície de inundação, com características morfológicas recorrentes a região onde está inserida.  Ainda que haja estudos de rios localizados no clima semiárido, com padrão entrelaçado e anabranching, principalmente na Austrália, existe uma carência metodológica para rios semiáridos brasileiro. A produção acadêmica sobre barras e ilhas está concentrada nos ambientes fluviais localizados em clima tropical, subtropical e temperado, baseado nesse contexto, o trabalho tem como objetivo analisar as características morfológicas de barras e ilhas no rio Jaguaribe-CE, trecho que vai da passagem molhada da barragem das pedrinhas no Município de Limoeiro do Norte até a passagem molhada de Sucurujuba em Quixeré, com recorte temporal 2001 a 2016 (16 anos).  Para isso, o trabalho foi estruturado a partir de uma lógica sistêmica, com etapas de caracterização da área de estudo; trabalho de campo para levantamento fotográfico e coleta de sedimentos; fase de laboratório para análise granulométrica através dos processos de peneiramento mecânico e pipetagem; e etapa de gabinete destinada à coleta de dados de chuva e vazão e ao sensoriamento remoto e geoprocessamento. Os resultados obtidos através da análise das imagens orbitais mostraram que as principais mudanças evolutivas referentes ao crescimento da área observada aconteceram entre 2014 e 2016, período correspondente à seca prologada no Ceará, que teve início em 2012. Verificou-se que as ilhas mais largas possuem tendência de sedimentação lateral superior, devido ao barramento de fluxo que o próprio depósito faz. No que refere as barras laterais, foi observado que sua gênese é resultado de processos distintos, registrados em períodos chuvosos como 2009, provocando a redistribuição sedimentar de partículas por todo o leito, e em anos secos como 2016, pela exposição de bancos arenosos antes submersos que faziam parte do leito molhado. As barras de planície, em sua totalidade, apresentaram crescimento areal em 100% dos depósitos, devido sua resistência frente a processos erosivos. Ademais, considerou-se necessária a adoção de classificações terminológicas pautados em características morfológicas para climas semiáridos, visto que, a má interpretação dos termos pode alterar os resultados da pesquisa.
DINÂMICA GEOMORFOLÓGICA DE SÃO JOSÉ DOS AUSENTES (RS) NO QUARTENÁRIO TARDIO: EVIDÊNCIAS EM PALEOFUNDO DE VALE DE BAIXA ORDEM HIERÁRQUICA
Authors: Pereira Josielle Samara , Paisani Julio Cesar , Paisani Sani Daniela Lopes
Published: July 2020

O presente artigo traz resultados referentes à dinâmica geomorfológica de São José dos Ausentes (RS) no Quaternário tardio, através de registros estratigráficos em paleofundo de vale de baixa ordem hierárquica colmatado. Para o referido estudo, adotou-se, conjuntamente, os critérios lito-, pedo-, alo- e cronoestratigráfico na seção estratigráfica representativa de seus materiais, bem como análises de isótopo estáveis do carbono e fitolítica. Estabeleceu-se a geocronologia pelos métodos de luminescência oticamente estimulada e 14C. A arquitetura da seção estratigráfica revelou três sequências coluviais, respectivamente do topo para a base: sequência coluvial superior pedogenizada, sequência coluvial intermediária e sequência coluvial basal; e uma sequência pedogenética hidromórfica, que se refere ao paleossolo hidromórfico localizado na base da seção. Ao todo foram individualizados 27 níveis pedoestratigráficos além da alterita de riolito. Constatou-se que durante o Último Interestadial (> 25.000 anos AP) a paisagem esteve em equilíbrio dinâmico, com dominante atuação da pedogênese, sob condições paleoambientais similares à moderna. Posterior a esse período houve a atuação da morfogênese atuando de maneira contínua, gerada pela intercalação entre, movimento de massa e escoamento superficial. O movimento de massa foi responsável pela sedimentação do fundo de vale. A partir de 19.150 anos AP a sedimentação perdeu intensidade e passou a predominar a erosão, como se observa através de incisão erosiva linear (paleovoçoroca) que truncou o material coluvial da seção estratigráfica. Após essa fase de erosão mecânica, a morfogênese retorna a registrar sedimentação comandada pelo escoamento superficial. A partir de 4.860 anos AP a morfogênese continuou atuando, dando origem à sequência coluvial superior, porém perdeu vigor favorecendo a melanização dos materiais propiciando a formação de epipedon, bem como deixou na paisagem uma morfologia similar à encosta suavemente inclinada para o eixo de baixa ordem hierárquica moderna. Diante do quadro evolutivo do paleofundo de vale entende-se que os fenômenos de pedogênese e morfogênese registrados expressam a dinâmica pela qual passou a paisagem geomorfológica de São José dos Ausentes (RS).
L’élevage ovin extensif du Montmorillonais entre recherche d’autonomie, exigences des filières et simplicité de conduite
Authors: DEDIEU B. , CHABOSSEAU J.M. , BENOIT M. , LAIGNEL G.
Published: July 2020

Les pratiques de conduite de 13 troupeaux ovins extensifs (chargement inférieur à 1 UGB/ha SFP) du Montmorillonais (Centre Ouest) sont analysées en référence à trois déterminants : la recherche d’autonomie fourragère (peu de concentrés distribués), la recherche de ventes au 1er semestre (cours élevés des agneaux) et la simplicité de la conduite. Trois conceptions de conduite sont identifiées, privilégiant l’économie de concentrés, des ventes précoces en début d’année, ou les deux à la fois. Les situations les plus autonomes renvoient à des niveaux de chargement très faibles (0,6-0,8 UGB/ha) où l’économie de concentrés porte sur l’alimentation des mères en plus de celui des agneaux. La simplicité de la conduite, repérée par une formule stable d’allotement des brebis, est manifeste dans les situations où l’agriculteur est le seul permanent (4 cas sur 6), situations non spécifiques d’une conception de conduite. Les performances techniques et économiques (marge brute par brebis) sont sensiblement équivalentes selon les conceptions de conduite et les formules d’allotement. La prise en compte des répartition des mise bas dans l’année, des formules d’allotement et de l’ajustement du chargement aux disponibilités hivernales précisent les questions techniques associées à l’ "extensif ".
Influence de la reproduction désaisonnée des caprins sur les résultats techniques et économiques des élevages
Authors: OUIN S.
Published: July 2020

La reproduction des caprins est marquée, sous nos latitudes, par une forte saisonnalité. Afin de satisfaire aux besoins des transformateurs de lait, les éleveurs cherchent à anticiper la période de mise bas des chèvres. Ils utilisent principalement pour cela les traitements de synchronisation hormonale de l’oestrus. L’article analyse les conséquences techniques et économiques du désaisonnement des caprins sur une longue période (1989 à 1992).
La production laitière annuelle moyenne par chèvre n’est pas modifiée par le désaisonnement, alors que s’accroissent le taux protéique moyen (de + 0,7 à 1 g/l) et la proportion de lait produit en hiver (jusqu’à + 20 % pour les troupeaux mettant bas en novembre). Les élevages pratiquant régulièrement le désaisonnement n’obtiennent pas de meilleures performances que ceux ayant maintenu des mise bas tardives, en raison des perturbations provoquées par le programme de désaisonnement. Leur progression sur quatre ans s’avère même inférieure.
Le désaisonnement limite le groupage des mise bas : l’étalement moyen des parturitions s’est accru de 40 jours (+ 41 %) entre 1989 et 1992, atteignant en moyenne 4,5 mois. En conséquence, les renouvellements des troupeaux sont hétérogènes, entraînant des difficultés dans la conduite d’élevage et la mise en reproduction des chevrettes.
En revanche, les élevages qui maîtrisent correctement le désaisonnement et l’élevage des chevrettes de renouvellement sont les plus performants (en 1992 : + 120 l de lait (+ 17 %) et + 326 F de marge brute par chèvre (+ 28 %). L’observation des chevrettes d’élevage est donc un bon critère d’appréciation de la technicité de l’élevage.
Median Sacral Artery Rupture as a Complication of Posterior-Only Approach of L4 Total En Bloc Spondilectomy
Authors: Garcia-Maya Beatriz , Pizones Javier , Sanchez-Marquez Jose Miguel , Talavera Gloria , Perez-Grueso Francisco Javier , Fernandez-Baillo Nicomedes
Published: July 2020

Case:

A 6-year-old patient with Ewing sarcoma at L4 who was treated with total en bloc spondilectomy (TES) through a posterior-only approach. During the dissection of the anterior L4 body, there was uncontrollable bleeding from an unknown origin, which needed packing, massive transfusion, and urgent laparotomy. A median sacral artery (MSA) rupture was identified as the cause of this massive bleeding. Eventually, the patient was successfully stabilized.

Conclusions:

To our knowledge, this is the first reported intraoperative bleeding of the MSA related to a lumbar TES through posterior-only approach. This life-threatening complication should be considered when planning for this type of surgery.
Characterization of the Rayoso Formation: The Importance of the 3D Modeling in Decision-Making for a Polymer Injection Project
Authors: Weisman Ignacio Jose , Lehu Remi Eric , Gandi Silvana , Tennerini Gerardo , Arguëllo Scotti Agustin
Published: July 2020

A chemical EOR project has been implemented in the fluvial succession of the Rayoso Formation since 2014. In the aim to understand polymer flooding processes, geological 3D modelling and numerical simulation are powerful tools to interpret field data and help to mitigate uncertainties of an early polymer injection at field scale. The Rayoso Formation was modeled following a multi-scale rationale: a multi-field scale model (>50km), a field-scale model (>10km) and a pilot-scale model (>1km). The results of numerical simulations were compared with the observed field? data. These runs included polymer injection vs. water injection, multiple adsorption values and polymer degradation.

The key results of that work are summarized as following: For polymer injection the simulation reproduces the increasing oil cut in the observed data, whereas the waterflooding cases show an oil cut drop. Polymer simulation also matches the observed bottom hole pressure drops in producers better than water simulation. Based on these results, it has been possible to determine the polymer response.Analytical calculations, based on tracer arrival time, give a polymer adsorption greater than 300 µg/g. Using different values of adsorption, the simulation shows that the actual value is one magnitude order less than the calculated one. Therefore, extremely high values of adsorption are excluded.Significant degradation is ruled out by running a simulation with a polymer viscosity 4 times smaller than the non-degraded one at the same concentration. The simulation shows an early arrival of the degraded (less viscous) polymer at the producer wells. This has never been observed in the wells showing that the degredation has a negligible effect.

Numerical simulation is thus used to interpret the polymer pilot results and consequently, allows to mitigate risks and make early decisions.
Mathematical Modeling, Laboratory Experiments, and Sensitivity Analysis of Bioplug Technology at Darcy Scale
Authors: Landa-Marbán David , Bødtker Gunhild , Vik Bartek Florczyk , Pettersson Per , Pop Iuliu Sorin , Kumar Kundan , Radu Florin Adrian
Published: July 2020

In this paper, we study a Darcy-scale mathematical model for biofilm formation in porous media. The pores in the core are divided into three phases: water, oil, and biofilm. The water and oil flow are modeled by a generalized version of Darcy's law, and the substrate is transported by mechanical dispersion, diffusion, and convection in the water phase. Initially, there is biofilm on the pore walls. The biofilm consumes substrate for production of biomass and modifies the pore space, which changes the rock permeability. The model includes detachment of biomass caused by water flux and death of bacteria, and it is implemented in the MATLAB Reservoir Simulation Toolbox (MRST). We discuss the capability of the numerical simulator to capture results from laboratory experiments. We perform a novel sensitivity analysis based on sparse-grid interpolation and multiwavelet expansion to identify the critical model parameters. Numerical experiments using diverse injection strategies are performed to study the impact of different porosity/permeability relationships in a core saturated with water and oil.
Storage time and temperature affect the isolation rate of Mannheimia haemolytica and Pasteurella multocida from bovine bronchoalveolar lavage samples
Authors: Driessche Laura Van , De Neve Charlotte , Haesebrouck Freddy , Leenen Katharina van , Boyen Filip , Pardon Bart
Published: July 2020

Background: A microbiological diagnosis is essential to better target antimicrobial treatment, control and prevention of respiratory tract infections in cattle. Under field conditions, non-endoscopic broncho-alveolar lavage (nBAL) samples are increasingly collected. To what extent the highly variable turnaround time and storage temperatures between sampling and cultivation affect the isolation rate of bacterial pathogens is unknown. Therefore, the objective of this experimental study was to determine the effect of different storage temperatures (0°C, 8°C, 23°C and 36°C) and times (0,2,4,6,8,24,48 hours) on the isolation rate and concentration of Pasteurellaceae in nBAL samples from clinically affected animals.Results: At a storage temperature temperature of 36°C isolation rates of Mannheimia haemolytica and Pasteurella multocida were significantly reduced 6h and 48h after sampling, respectively. At room temperature (23°C), a decrease in M. haemolytica and P. multocida isolation rate was noticed, starting at 24 and 48 hours after sampling, respectively, but only significant for P. multocida at 48h. The presence of microbial contamination negatively affected the isolation of P. multocida in clinical nBAL samples, but not of M. haemolytica. Conclusion: Optimal M. haemolytica and P. multocida isolation rates from clinical nBAL samples are obtained after storage at 0°C or 8°C, provided that the sample is cultivated within 24 hours after sampling. The maximum period a sample can be stored without an effect on the M. haemolytica and P. multocida isolation success varies and is dependent on the storage temperature and the degree of microbial contamination.
Prevalence of microhematuria in renal colic and urolithiasis: a systematic review and meta-analysis
Authors: Minotti Bruno , Treglia Giorgio , Pascale Maria Rosa , Ceruti Samuele , Cantini Laura , Anselmi Luciano , Saporito Andrea
Published: July 2020

Background This systematic review and meta-analysis aims to investigate the prevalence of microhematuria in patients presenting with suspected acute renal colic and/or confirmed urolithiasis at the emergency department. Methods A comprehensive literature search was conducted to find relevant data on prevalence of microhematuria in patients with suspected acute renal colic and/or confirmed urolithiasis. Data from each study regarding study design, patient characteristics and prevalence of microhematuria were retrieved. A random effect-model was used for the pooled analyses. Results Forty-nine articles including 15’860 patients were selected through the literature search. The pooled microhematuria prevalence was 77% (95%CI: 73-80%) and 84% (95%CI: 80-87%) for suspected acute renal colic and confirmed urolithiasis, respectively. This proportion was much higher when the dipstick was used as diagnostic test (80% and 90% for acute renal colic and urolithiasis, respectively) compared to the microscopic urinalysis (74% and 78% for acute renal colic and urolithiasis, respectively). Conclusions This meta-analysis revealed a high prevalence of microhematuria in patients with acute renal colic (77%), including those with confirmed urolithiasis (84%). Intending this prevalence as sensitivity, we reached moderate values, which make microhematuria alone a poor diagnostic test for acute renal colic or urolithiasis. Microhematuria could possibly still important to assess the risk in patients with renal colic.