bluuebunny/crossref_metadata_2025 huggingface dataset:
Laboratório Virtual de Aprendizagem: Uma Proposta Taxonômica
Authors: Amaral Érico , Ávila Bárbara , Zednik Herik , Tarouco Liane
Published: May 2019

Este artigo apresenta uma proposta de taxonomia para Laboratórios Virtuais de Aprendizagem. A classificação é composta por duas dimensões nas quais busca-se analisar o nível de interatividade de um Laboratório Virtual, bem como o nível de suporte oferecido pela arquitetura aplicada. O embasamento teórico se alicerçou em Schwier e Misanchuk para definir os níveis de interatividade e em Santos para distinguir os tipos de arquitetura de software. Inicialmente é abordado o conceito de laboratórios de aprendizagem e seus modelos, com foco nos Laboratórios Virtuais de Aprendizagem (LVA). Após, descreve-se a taxonomia proposta e aplica-se a mesma na avaliação de dois LVA com a finalidade de validá-la. O trabalho se justifica pela necessidade de orientação aos elaboradores de LVA e compreensão dos usuários acerca do assunto.
Relato de experiência da utilização do Podcast com deficientes visuais
Authors: Pereira Lidianne Lima , Sobrinho Marialina Corrêa , Geller Marla Teresinha Barbosa
Published: May 2019

Os avanços tecnológicos vem sendo incorporados com grande intensidade  no meio educacional,  tornando-se de grande valia na educação especial. Dentre estes recursos, pode-se citar o Podcast que  é uma ferramenta da Web 2.0 e vem proporcionando uma crescente e boa aceitação por parte dos usuários da rede mundial de computadores. Este artigo tem como objetivo relatar a experiência da utilização do Podcast com deficientes visuais. A proposta é utilizar a ferramenta como meio de distribuir conteúdos referentes à disciplina de História, tendo como alvo estudantes do ensino médio.
Ambientes de Desenvolvimento Integrado no Apoio ao Ensino da Linguagem de Programação Haskell
Authors: Russi Davi Felipe , Charão Andrea Schwertner
Published: May 2019

. A linguagem Haskell é comumente utilizada em universidades para ensino do paradigma de programação funcional. Neste artigo, defende-se que o uso de um ambiente de desenvolvimento integrado  (Integrated Development Environment - IDE) é vantajoso para apoiar o ensino e o aprendizado desta linguagem. Nesta linha, apresenta-se primeiramente uma análise comparativa de IDEs disponíveis para Haskell e, em seguida, relata-se uma experiência realizada utilizando-se o IDE Eclipse em sala de aula. Os resultados contribuem para a adoção deste tipo de ferramenta no ensino de Haskell.
REPRESENTAÇÃO GRÁFICA DIGITAL PARA O DESIGN ATRAVÉS DE AMBIENTES VIRTUAIS DE APRENDIZAGEM
Authors: PIEDRAS Estela Maris Reinhardt , ARAUJO Ana Paula , BORDA Adriane Almeida da Silva , HERRMANN Ana Cláudia , ORTIZ José Oxlei
Published: May 2019

A área de representação gráfica exige abordagens e conteúdos educacionais que tratem de maneira integrada conceitos e procedimentos advindos tanto de técnicas tradicionais quanto de tecnologias digitais. Este artigo trata de uma pesquisa-ação na disciplina de Representação Gráfica e Digital, em que o processo de ensino-aprendizagem de sala de aula foi complementado pelas práticas de orientação à distância e de construção de conteúdo educacional digital no ambiente virtual de aprendizagem. A metodologia utilizada visa dar autonomia aos alunos no processo de aprendizagem, buscando avanços na interação entre os meios tradicionais e digitais de representação. Os resultados demonstram o caráter colaborativo que o ambiente despertou, aprimorando conhecimentos, otimizando os trabalhos práticos e agilizando o processo de ensino e aprendizagem.
Utilização das Plataformas Web e Ginga-NCL no Desenvolvimento de Aplicações de EAD adaptadas para TV Digital
Authors: Barbosa Maria Lúcia Kroeff , Schulz André , Bordignon Alexandro , Roesler Valter
Published: May 2019

Diversas pesquisas estão sendo realizadas em relação ao uso da televisão digital como uma ferramenta de EaD. Aplicativos direcionados para educação, saúde e entretenimento são comuns, entretanto, a grande maioria não conta com o apoio da transmissão dos mesmos através da  Transport Stream de alguma emissora específica de televisão.  Para executar o aplicativo, o usuário deve utilizar um  pendrive ligado ao Terminal de Acesso. Por outro lado, estão surgindo tecnologias de televisão com navegador  web embutido, criando duas possibilidades: a)  desenvolver um aplicativo NCL/Lua/Java ligado a um  pendrive na televisão; b) desenvolver um aplicativo baseado em HTML que  acessa um servidor web remoto. Este  artigo  objetiva  analisar ambas as  estratégias de  desenvolvimento da  interação com o  usuário  e a  TV Digital. Para tanto, foram desenvolvidos  dois aplicativos  em ambas plataformas a fim de melhor comparar as abordagens.
Recursos das tecnologias de informação e comunicação mediando o ensinoaprendizagem e configurando ecologias cognitivas de estudantes do Centro de Ciências Rurais
Authors: Müller Liziany , Bandeira Andriéli Hedlund , Alves Bruna Mendonça , Barin Cláudia Smaniotto , Mallmann Elena Maria
Published: May 2019

Este trabalho teve por objetivo investigar a contribuição de práticas pedagógicasque integram recursos das tecnologias de informação e comunicação na mediação doprocesso ensino-aprendizagem para configuração de ecologias cognitivas. Ametodologia foi pautada em uma pesquisa exploratória num paradigma construtivista.   Como instrumento de coleta de dados foi realizado questionário tipo survey comestudantes dos Cursos de Graduação em Agronomia, Tecnologia de Alimentos eMedicina Veterinária da Universidade Federal de Santa Maria, RS, Brasil. A integraçãode recursos das tecnologias de informação e comunicação modifica a concepção deensino-aprendizagem gerando comunicação mais contínua e sensorial. Além daverbalização, a hipermídia potencializa interatividade que produz interação e criação deconhecimento. O processo ensino-aprendizagem mediado por hipermídia permite aliar oconhecimento e a formação epistemológica à integração reflexiva, pedagógica, coletiva,articuladora e atrativa dos recursos configurando a ecologia cognitiva. Assim, ainteratividade resignifica a relação indivíduo-objeto criando uma nova dinâmica nosprocessos de construção do saber baseados na existência de relações, diálogos einterações.
MAPAS CONCEITUAIS E APRENDIZAGEM SIGNIFICATIVA NO ENSINO DE REDE DE COMPUTADORES DO CURSO SUPERIOR DE TELECOMUNICAÇÕES
Authors: Santos Suélly Lima dos , Silva Marco Antonio Gomes Teixeira da , Macedo Suzana Da Hora
Published: May 2019

A proposta deste artigo é apresentar a utilização de mapas conceituais como ferramenta para o ensino-aprendizagem em rede de computadores  num curso superior de telecomunicações. Esta experiência é baseada na teoria da aprendizagem significativa. A metodologia empregada foi um experimento conduzido em sala de aula onde os alunos puderam produzir os mapas conceituais de acordo com os temas estudados. Este trabalho tem como objetivo proporcionar aos docentes novas situações potencialmente significativas de ensino-aprendizagem da cadeira, utilizando mapas conceituais. Como conclusão levou-se em consideração os comentários e avaliações que foram feitos para o término do trabalho, destacando-se as vantagens no processo de aprendizagem.
MAPAS CONCEITUAIS E AVALIAÇÃO DE APRENDIZAGEM NO ENSINO DE REDES DE COMPUTADORES
Authors: Brezolin João Mário Lopes , Grando Neiva Ignês
Published: May 2019

: O crescimento e o desenvolvimento da internet propiciaram o surgimento de novos serviços de rede e também a necessidade de profissionais que a suportem. Dessa forma, tornou-se imprescindível formar pessoas que  compreendam as tecnologias inerentes às redes de computadores e seus serviços. A transposição didática desses conhecimentos é uma tarefa complexa, que exige de alunos e professores comprometimento no processo pedagógico. Este artigo apresenta as contribuições do uso de mapas conceituais e da ferramenta de autoria Cmap-Tools como estratégias de ensino e aprendizagem na disciplina Rede de Computadores, com base na fundamentação teórica de Vygotsky, Ausubel, Novak, Johnson-Laird e Lévy.
Tecnologias e Educação Profissional: O que dizem os alunos de uma Fábrica de Games?
Authors: Magalhães Sthenio José Ferraz , Cavalcante Patrícia Smith
Published: May 2019

Esta pesquisa  teve como objetivo identificar as contribuições da formação oferecida pelo projeto  Fábrica de Games (FG), incorporado às atividades de uma  escola pública do ensino médio do Estado de  Pernambuco, além de tentar compreender  suas especificidades e sua relação com a educação profissional técnica de nível médio.Realizou-se uma pesquisa exploratória de natureza qualitativa,  onde foram analisados questionários aplicados aos alunos.  Os resultados apontaram que a construção de games estimula nos alunos a criticidade, o protagonismo intelectual, a conscientização e a autonomia, além de indicar que a metodologia de trabalho utilizada é inovadora e agrega ao processo de ensino e aprendizagem situações lúdicas que facilitam a construção do conhecimento. Evidenciamos ainda que as contribuições da FG para a educação profissional técnica de nível médio estão ligadas,  principalmente, ao diferencial das formações oferecidas por suas habilitações.
Web 2.0 e Pesquisa: Um Estudo do Google Docs em Métodos Quantitativos
Authors: Silva Adriana Freire da , Lós Dayvid Evandro Da Silva , Lós Djalma Rodolfo Da Silva
Published: May 2019

As abordagens inovadoras de ensino vêm se configurando como o meio mais eficiente de se  alcançar uma educação de qualidade. Nesse contexto, as ferramentas da Web 2.0 aliam-se cada vez mais às práticas educativas a fim de alcançar seus objetivos.Entretanto, percebemos que nas pesquisas  Survey poucas mudanças ocorreram nas práticas de gerenciar/administrar os questionários. Diante desse quadro, este trabalho busca  realizar reflexões sobre a contribuição das ferramentas da  Web 2.0, em especial o Google Docs, na pesquisa  Survey, partindo  de  questionamentos  acerca do uso  dessaferramenta  mediando os processos de elaboração, disponibilização e avaliação dos questionários. Procuramos responder  aos questionamentos a partir de um estudo bibliográfico e análises de duas formas de apresentação dos questionários, uma na forma do texto impresso e outra  através do  Google Docs. Percebemos que o uso dessa ferramenta possibilita ao pesquisador uma diversidade de estratégias como também uma economia coletiva  nos processos do método de pesquisa
UMA EXPERIÊNCIA DE EDUCAÇÃO HÍBRIDA: ESTUDO DE CASO EM UM CURSO DE PÓS-GRADUAÇÃO
Authors: Castro Rafael Fonseca de , Damiani Magda Floriana
Published: May 2019

A presente pesquisa objetivou  investigar, a partir das impressões dos sujeitos, aspectos relacionados a uma experiência educacional híbrida de  uma turma de um curso de  pósgraduação que, em duas disciplinas da sua grade curricular, utilizou o  AVEA TelEduc concomitantemente às aulas presenciais físicas tradicionais. Tratou-se de um  estudo de caso, baseado em uma  análise de dados coletados por meio de  questionários e análise  de documentos  - postagens em fóruns. Os achados  da pesquisa sugerem que: os  sujeitosconsideram fundamental a utilização pedagógica das  novas  tecnologias; alertam sobre a forma como estas devem ser empregadas; e avaliaram como bastante positiva a experiência  educacional híbrida que vivenciaram. Com efeito,  esta investigação  também visa colaborar com o debate „educação-tecnologia.
Sobre o tempo que passou: a imersão na paisagem cibernética e o surgimento de novas temporalidades e formas de perceber o tempo
Authors: Meirelles Mauro , Boll Cíntia Inês
Published: May 2019

O presente artigo versa sobre a forma como o tempo é percebido a partir do uso quotidiano das novas tecnologias da informação e comunicação, em especial o computador. Para este fim, nos utilizamos de bases de dados construídas a partir de pesquisa realizada em 2005 e de dados oriundos da experiência de cerca de sete anos com a modalidade de ensino a distância, ora como professor, ora como aluno, ora como tutor. Neste sentido, os resultados apontam que cada vez mais cresce o acesso a diferentes tecnologias que acabam por transformar o quotidiano das pessoas, alterando, assim, significativamente a forma como, estas, se relacionam como o tempo a partir de sua imersão no ciberespaço ou, naquilo, que denominamos de paisagem cibernética.
DOCSCOLLAB : UMA FERRAMENTA DE AUXÍLIO À EDIÇÃO COLABORATIVA
Authors: Lima Maria de Fátima Do Prado , Battistelo Daniel , Webber Carine , Guimarães Bruno
Published: May 2019

Ferramentas de suporte à edição colaborativa visam contribuir para o desenvolvimento da expressão escrita, habilidade tão necessária em todas as disciplinas e níveis educacionais. Este artigo propõe um estudo sobre editores colaborativos e  apresenta  uma ferramenta web simples que adiciona novas funcionalidades de coordenação, cooperação e comunicação ao Google Docs. A ferramenta desenvolvida possibilita a criação de um fórum de discussão cujos tópicos estejam vinculados a documentos  em processo de edição. Além disso, ela permite a criação de uma árvore de alocação de tarefas que auxilia no gerenciamento das atividades do grupo envolvido na edição colaborativa de documentos. A ferramenta é operacional e está disponível para usuários através de sua instalação em servidor local.
Membros: v. 2, n. 2 (2004)
Authors: . ..
Published: May 2019

Julio Alberto Nitzke - SEAD/UFRGSMarcus Vinícius de Azevedo Basso - Instituto de Matemática/UFRGSRosa Maria Vicari - Instituto de Informática/UFRGSLiane Margarida Rockenbach Tarouco - CINTED/UFRGSMára Lúcia Fernandes Carneiro - UERGSRicardo Azambuja Silveira  - UFPelPatrícia Alejandra Behar - Faculdade de Educação/UFRGSMagda Bercht - Instituto de Informática/UFRGSMargarete Axt - PGIE/UFRGSMarie Jane Soares Carvalho - PPGEDU/UFRGS Coordenação :Liane Margarida Rockenbach Tarouco - CINTED/UFRGS
Membros: Educação a distância
Authors: . ..
Published: May 2019

Ana Bertoletti De Marchi - Universidade de Passo Fundo Cleuza Alonso - Universidade Federal de Santa Maria Elisa Boff - Universidade de Caxias do Sul Eliseo Reategui - Universidade Federal do Rio Grande do Sul Evandro Alves - Universidade Federal do Rio Grande do Sul Gilse Falkembach - Universidade Luterana do Brasil - ULBRA Janete Sander Costa - Universidade Federal do Rio Grande do Sul Joice Otsuka - Universidade Federal de São Carlos José Valdeni de Lima - Universidade Federal do Rio Grande do Sul Liane Tarouco - Universidade Federal do Rio Grande do Sul Liliana Passerino - Universidade Federal do Rio Grande do Sul Magda Bercht - Universidade Federal do Rio Grande do Sul Marcelo Foohs - Universidade Federal do Rio Grande do Sul Marcus Basso - Universidade Federal do Rio Grande do Sul Maria Cristina Biazus - Universidade Federal do Rio Grande do Sul - UFRGS Marlise Geller - Universidade Luterana do Brasil Patricia Behar - Universidade Federal do Rio Grande do Sul Querte Mehlecke - Faculdades de Taquara-FACCAT/RS Renato Dutra - MicroPower - Educação e Negócios Ricardo Silveira - Universidade Federal de Santa Catarina Roseclea Medina -Universidade Federal de Santa Maria Sidnei Silveira - Centro Universitário Ritter dos Reis - UniRitter Silvia Meirelles Leite - Universidade Federal de Pelotas Simone Conceição - Universidade de Wiscosin - Estados UnidosCoordenação :José Valdeni de Lima - PPGIE Liane Margarida Rockenbach Tarouco - CINTED/UFRGSEliseo Reategui - FACED/PGIE - UFRGS
Membros: v. 1, n. 2 (2003)
Authors: . ..
Published: May 2019

Sérgio Roberto Kieling Franco - SEAD / UFRGSMarcus Vinícius de Azevedo Basso - Instituto de Matemática / UFRGSRosa Maria Viccari - Instituto de Informática / UFRGSLiane Margarida Rockenbach Tarouco - CINTED / UFRGS Mára Lúcia Fernandes Carneiro - UERGSRicardo Azambuja Silveira  - UFPelMagda Bercht - Instituto de Informática / UFRGSMargarete Axt - PGIE/UFRGSMarie Jane Soares Carvalho - PPGEDU/UFRGS Coordenação :Liane Margarida Rockenbach Tarouco - CINTED/UFRGS
Pesquisa-ação para inclusão digital de professores e alunos: um projeto piloto usando Google Docs
Authors: Noering Klemann Miriam , Elena Rapkiewicz Clevi
Published: May 2019

Vivemos atualmente na assim chamada Sociedade da Informação, na qual a inclusão de diferentes profissionais no mundo digital é essencial, particularmente no caso de professores. Uma das dificuldades dos processos de inclusão digital é a escolha dos instrumentos e ferramentas a serem utilizados. Neste artigo, apresentamos a análise do Google Docs como ferramenta possível para integrar processos de inclusão digital tanto de professores quanto de alunos, a partir de uma experiência prática em uma cidade do interior do RS. A experiência mostra que trata-se de uma ferramenta fácil de usar e com amplo potencial, mas cujo uso em larga escala depende, ainda, da questão da infra-estrutura de Internet nas escolas.
Vegetation structure and composition of mangrove Palo Seco Quepos, Costa Rica
Authors: Alfaro-Sibaja Laura , Barquero-Salgado Daniela , Fonseca Alicia , Montoya-Solano Randall A. , Morales-Cerdas Vanesa , Ramírez-Arce Daniel
Published: May 2019

The Palo Seco mangrove in the Pacific coast of Costa Rica is in a tropical wet forest-perhumid forest transition. The nearby human population and tourism are threatening its borders. We studied mangrove’s structure, composition and regeneration as a base for future comparisons. We sampled eight 10m x 10m plots. Within them, 1m2 and 16 m2 plots were established to measure seedlings and saplings. We measured 153 trees in an 800 m2 area, with an average density of 0,19 ± 0,12 Ind/m2. Avicennia germinans was the dominant species, and Avicennia bicolor the less abundant. While seed- ling’s basal area and density were high, we found a low sapling density. We found a strong positive correlation between seedling density and trees richness and density, whereas that a strong significant negative correlation between the seedling regeneration index and tree stem height, diameter and basal area. We found a positive correlation be- tween the seedling regeneration index and mangrove tree’s richness and density. We conclude that several variables have an influence in the seedling’s establishment, survival and growth, intervening in the mangrove’s maintenance and regeneration. Strong competition with other vegetation can be a major factor in sapling growth. Palo Seco mangrove has a great potential for regeneration, and stem height and diameter evidence of an old-growth ecosystem.
Extension of the genus Pseudopeas (Dysopeas) (Gastropoda: Subulinidae) from Venezuela to Nicaragua
Authors: López Adolfo , Urcuyo Janina , Vega Gabriel
Published: May 2019

The study of Nicaraguan land snails is fragmentary. Recent sampling produced specimens of an undetermined species of Pseudopeas Putzeys, 1899. This genus was segregated from Opeas Albers, 1850 by reason of its prominent rib sculpture and later re-de- scribed by Pilsbry (1906) for the characteristic spiral sculpture of its nepi- onic whorls. Baker (1927) named a new subgenus Dysopeas for species where the spiral sculpture covers the entire shell, not only the nepionic whorls. The Nicaragua specimens show nepionic and body sculptures that precisely match descriptions and illustrations given by Pilsbry and Baker for the complex Pseudopeas/Dysopeas. Since 1999, a total of 160 specimens have been collected from El Castillo on Río San Juan, Isletas de Granada and the Universidad de las Regiones Autónomas de la Costa Caribe Nicaragüense (URACCAN) in Blue elds. Similitude with some sculpture traits and protoconch development with species of Spiraxidae, Subulinidae or Lamellaxis might cause confusion in the determination of Pseudopeas. Besides the critical protoconch sculpture and pro le, additional discriminatory di erences from these look-alikes are dimensions, sculpture pattern and crystalline structure.
Effects of a new tobacco law on the knowledge, attitudes, and habits of smokers in San José and Jacó, Costa Rica
Authors: Sparks Sarah , Morales Ortega José
Published: May 2019

Smoking is a leading cause of death worldwide. Many nations have implemented bans on smoking in public places to try to increase national health and to relieve the economic burden caused by the deteriorating health of smokers. In 2012, Costa Rica passed similar legislation barring smoking in any area that was deemed a gathering place for people, including outdoor areas such as bus stops and parks.This project evaluated a verbal questionnaire in order to determine the knowledge, attitudes, and habits of smokers, as well as to ascertain establishment compliance, in San José and Jacó, Costa Rica. The survey was completed by 150 smokers and 54 establishments over a span of two months. General knowledge of the law was found to be at a relatively low level, with most participants only having the most basic knowledge of the specific locations in which the law prohibits smoking. However, it was also found that men were more likely to have a deeper knowledge of the law than women (p=0.02). A tendency was found between the type of smoker and the change in smoking habits after the law passed where heavy smokers diminished their tobacco use, medium smokers sustained the same use, and light smokers slightly increased their use. (p=0.19). When combining other demographic groups with their changes in smoking habits, no significant tendency was found; the law does not appear to have a direct effect on any specific subgroup. This is not for lack of proper implementation, as 81.48% of establishments had the required no smoking sign of correct size and color. The overall effectiveness of the new law in decreasing tobacco use has been minimal, regardless of education level, gender, or job type.
Corporate governance and company performance in Italy: Corporate law and regulation perspective
Authors: Caserio Carlo , Trucco Sara
Published: May 2019

This paper proposes an extensive analysis of corporate governance and corporate board practices in Italy, under different perspectives. First of all, through a literature review, the research aims to analyze the main effects of laws and regulations on corporate board practices in the Italian setting by taking into account the most important corporate board models in different types of companies. This study also highlights the different functions and responsibilities assigned to the boards, bodies and boards’ members, according to the governance system implemented – classic/traditional, dualistic, monistic. For each of these systems, the main issues are presented and the most important critical points are illustrated. Regarding the functions and the responsibility of the board members, the link between the board governance and company performance is discussed on the basis of the main literature, as well as the laws concerning the participation of women to the boards’ activities. Furthermore, the effects of gender diversity on company performance is analysed taking into account the main studies on this topic. Finally, the paper presents some conclusions and future research areas on the aforementioned topics: it proposes future empirical analysis on the effects that different governance systems, different board compositions and different roles of directors, as required by the law, may have on the performance of listed/unlisted companies and on family/non-family companies.
Board of directors specificities in the context of Portuguese corporate governance and corporate law
Authors: Vieira Elisabete , Neiva Joaquim
Published: May 2019

The corporate governance is a mechanism to protect investors in the markets around the world. This study analyses the board of directors’ specificities in the context of Portuguese Corporate Governance, and study the corporate governance effect of Portuguese listed firms on firm performance. The results show that the Latin Model (Two-Tier Model) is the most (least) adopted by Portuguese firms. The percentage of executive members is higher than that of non-executive members. In the year of 2014, women held only 9.5% of positions on board, which is very low. The results concerning the relationship between corporate governance and firms’ performance are not consensual. Although some studies find evidence of a positive relation between the two variables, others find no relationship. With this study, we contribute to the state of art of corporate governance in a country which investigation is still scarce.
Open Science and Educational Research: An Editorial Commentary
Authors: Concannon Fiona , Costello Eamon , Farrelly Tom
Published: May 2019

Educational technology as a broad and applied interdisciplinary research field faces challenges in achieving consensus on what constitutes good quality research. As the field is embedded in many other disciplines, considering what evidence matters and the optimal methodologies to conduct inquiry is continually evolving and maturing. Inhabiting a boundary between education, and computer science, and viewed through numerous theoretical lenses ranging from disciplines of sociology, politics, psychology, the learning systems, curriculum development, digital humanities, and beyond, the number of approaches contributing to the field is vast. The validity, trustworthiness and integrity of over two decades of research in this domain is continually questioned. Furthermore, as technology itself also changes, there are differing opinions on how best to explore and understand the role it plays in education.  How we define, research and evaluate our evidence is central to our understanding of how we learn and how this is enhanced with and through technology in various ways. Whilst scholars continue to critique and debate the veracity of findings, educational technology journals play an important role in allowing us to collectively peer review, and publish the best quality research studies. Changes in the open access publishing world and in the open science movement have the potential to address some of shortfalls in how our understandings are evaluated, critiqued and judged in this domain.
A forced 3-D time fractional ZK-Burgers model for Rossby solitary waves with dissipation and thermal forcing
Authors: Fu Lei , Yu Zheyuan , Dong Huanhe , Li Yuqing , Yang Hongwei
Published: May 2019

In the paper, beginning from the quasi-geostrophic potential vorticity equation with the dissipation and thermal forcing in stratified fluid, by employing multi-scale analysis and perturbation method, we derive a forced 3-D Zakharov Kuznetsor (ZK)-Burgers equation describe the propagation of the Rossby solitary waves within the fractional derivative. The exact solutions are given by virtue of the (G?/G)-expansion method to analyze the excitation effect of thermal forcing on the Rossby waves.
Stepwise loading-unloading creep testing of fly ash concrete and its constitutive model
Authors: Li Bing , Zhang Lian-Ying , Li Yan , Yin Hui-Guang , Liu Rui-Xue
Published: May 2019

Stepwise loading-unloading creep testing of concrete with fly ash content of 35%, and 50% was conducted. The time course curve of stepwise creep in fly ash concrete was obtained. Analyses have revealed that it had decelerated creep, constant velocity, and accelerated creep properties. Based on rheological theory, a non-linear viscoelastic-plastic rheological model (MSSB-NVPB) was constructed, and its constitutive relations and creep equations were obtained. Combined with experimental data, the model parameters were determined. The results showed that this model can characterize the creep properties of the fly ash concrete fairly well.
The infrared thermal wave imaging detection of micro-crack defects in Ti-Al alloy plate
Authors: Bu Chiwu , Zhang Xibin , Liu Guozeng , Tang Qingju , Yan Zugen
Published: May 2019

The Ti-Al alloy has good physical, chemical and mechanical properties, and it is the preferred material in aerospace and other special fields. The laser spots array is used for thermal excitation of the Ti-Al alloy specimen. Based on the fractional differential equation and Fourier heat conduction equation, the fractional heat transfer model of Ti-Al alloy plate specimen ex-cited by short pulse laser spots array is established, and the infrared thermal imaging simulation analysis is carried out by finite element method. The effects of crack width, crack depth and the distance between the crack and its nearest laser spot center on temperature abrupt jump is analyzed. With the increase of crack width and depth, the temperature abrupt jump increases, but the trend gradually slows down. The distance between the crack and its nearest laser spot center has a significant effect on the temperature abrupt jump. With the increase of the distance, the temperature abrupt jump first increases and then decreases. When the distance equals the laser spot radius, that is, the crack is tangent to the spot, the temperature abrupt jump reaches its maximum.
Relationships of role differentiation, cohesion, team member satisfaction and perceived group performance
Authors: Lim JungIn , Lee Suran , Shin Jaehyun , Park InJo , Sohn YoungWoo
Published: May 2019

The purpose of the present research was to investigate the structural relationships of role differentiation, cohesion, team member satisfaction, and perceived group performance and to examine the moderating effects of barrack’s structure and squad leader’s initiating structure in these relationships. A total of 924 ROK Army soldiers participated in this research and data were collected through survey. Results of the structural equation modeling analysis showed that role differentiation was positively related to cohesion, team member satisfaction, and perceived group performance, respectively. Also, cohesion mediated the relationships between role differentiation and team member satisfaction as well as between role differentiation and perceived group performance. The moderating effect of barrack’s structure in the relationship between role differentiation and team member satisfaction was significant, suggesting that team member satisfaction was higher in the hierarchical barrack than in the horizontal barrack when soldiers perceived that the role differentiation was high. The moderating effect of squad leader’s initiating structure in the relationship between role differentiation and perceived group performance was also significant, suggesting that the relationship between role differentiation and perceived group performance was stronger when squad leader’s initiating structure was high than low. Lastly, the results, implications, and limitations of this research were discussed.
Differences in drivers’ pedestrian avoidance response based on Warning timing, stimulus-response compatibility and Drivers’ distraction of auditory pedestrian collision warning system
Authors: Kang Hyunmin , Han Kwanghee , Lee Jaesik
Published: May 2019

In this study, the effects of auditory pedestrian collision warning system’s stimulus-response compatibility (compatible vs. incompatible) and warning timing(TTC: 2sec. vs. 4sec.) and type of driver distraction (control condition vs. auditory distraction vs. visual distraction) on pedestrian avoidance response were examined. The dependent measures were time to initial steering wheel maneuvering, steering wheel rotation angle, clearance distance to the pedestrian, ratio of pedestrian-collision and ratio of lane departure. The experiment used driving simulator and the results was as follows. First, the effects of stimulus-response compatibility appeared to differ as warning timing and types of driver distraction were varied. To be specific, stimulus-response incompatible condition was more suitable for auditory pedestrian collision warning system than stimulus-response compatible condition. Second, compare to 4sec, 2sec TTC condition yielded larger steering wheel rotation angle and higher ratios both in pedestrian-collision and lane departure. Third, among the types of driver distraction, the visual distraction impaired drivers’ ability to avoid the pedestrian most seriously. In conclusion, stimulus-response incompatible warnings which provided 4sec TTC condition seemed to be more reliable and useful in providing pedestrian-collision warning to drivers.
The effects of job demands on job stress
Authors: Lim KwangMo , Tak Jinkook
Published: May 2019

The purpose of this study was to examine the effect of job demands on job stress and the moderating effects of job control and procedural justice. Specifically, first, the job demands were divided into quantitative demands and qualitative demands, and relative effects of the two demands on job stress were compared. Second, the moderating effects of job control and procedural justice were tested. Data were collected from 454 employees engaged in various domestic companies. The results showed that both quantitative and qualitative demands had positively significant effects on job stress and qualitative demands had a greater effect on job stress than quantitative demands did. The results of moderating effects showed that job control had a moderating effect on the relationship between quantitative demand and job stress whereas there was no moderating effect of job control on the relationship between qualitative demand and job stress. Also there was a moderating effect of procedural justice on the relationship between quantitative demand and job stress, but contrary to the hypothesis, the relationship was stronger when procedural justice was high. Finally, the academic significance and practical implications of the study, the limitations and future research were discussed.
The relationship between task conflict, relationship conflict, team efficacy and task performance of Air Force Combat Flight Team
Authors: Lee Kyoungsu , Lim JungIn , Park Jiyoung , Sohn YoungWoo
Published: May 2019

The purpose of the present study was to investigate integrally the relationships among task conflict, relationship conflict, team efficacy, and task performance of the Air Force Combat Flight Team. Also, the study illustrated whether participative decision-making moderated the relationship between task conflict and team efficacy, and the relationship between relationship conflict and team efficacy. Surveys and supervisor-rating performance data of 284 combat flight teams of two Air Force fighter pilots were collected for assessing the aforementioned relationships. Analyzing through structural equation modeling, the results indicated that task conflict was negatively related to team efficacy and task performance. Relationship conflict was negatively related to team efficacy whereas they were positively related with task performance. Moreover, team efficacy mediated the relationship between task conflict and task performance, and the relationship between relationship conflict and task performance. Furthermore, participative decision-making moderated the relationships of task conflict and relationship conflict with team efficacy such that these negative relationships were stronger when wingman pilot’s perception toward leader pilot’s participative decision-making was low. We discuss the implications of these results, study limitations, and practical suggestions for future research.
A test of construct validity of the work meaning inventory
Authors: Tak Jinkook , Seo HyungJoon , Woo Yongjae , Sim HyeonJoo
Published: May 2019

The purpose of this study was to test the eight factors model and a high order factor structure of the Work Meaning Inventory(WMI) developed by Tak et al.(2015) and with a sample of employees. Data were obtained from 1,000 employees using online survey. Results of exploratory factor analyses confirmed the original 8 factors of the WMI, confirming the construct validity of the WMI. Also results of high-order factor analyses showed that the three higher order factors(make a living, growth opportunity, self-actualization) were obtained. Finally, the implications, limitations, and future studies are discussed.
The effect of coaching leadership on creative behavior
Authors: Sung HyunJeong , Tak Jinkook
Published: May 2019

The purpose of this study was to examine the relationship between coaching leadership and creative behavior. Also, this study examined the mediating effect of psychological empowerment on the relationship between coaching leadership and creative behavior. Data were collected from 429 employees from a number of companies. The result of this study showed that the relationship between coaching leadership and creative behavior was significantly positive. Psychological empowerment mediated the relationship between coaching leadership and creative behavior. Based on the results, the implication of this study and the direction for future research were discussed.
Penentuan Prioritas Pelayanan Pengguna Jasa Kereta Api Dalam Transportasi Antarmoda Di Stasiun Gambir
Authors: Gusleni Yessi
Published: May 2019

This research study is a continuation of the senrice user qualihJ of railwat; senrice in intennodetransport at the Gambir station, with the result of research using IPA analysis metlwds (ImportancePerformance Analysis) and CSI (Customer Satisfaction Index), there are 7 (seven) attribute that hasvalue perception of low mlue but lurue high expectntions, the ease of obtnining information routejbusroute for the train seruices user inter-1110rfe of transport, sernrity guarantees for railwm; sennce userinter-mode of transport, officer prauide sen1ice to train user wlw have limited (disabled, elderly, etc).T7re crossing facilities, street facilities (corridor/road interface), and facilities for disabled/elderly.This rearch has the objective to determine tire priorities that can be done to improve intermodetransport senTices in Gambir station for train senrice users pracrided bt; PT. Kereta Api (Pesero) andtire local gavernment of D Kl frzknrtn .Result from research of seniice qualih; for train user i11 intermode of transport in Gambir stations,furtl?er in this study, in order to determine tire priority using tire quality function deplot;ment (jfd)analysis metlwd.The result of Quality Fuction Deplot;ment (QFD) analysis can re identified 13 priorities that can reimplemented to imprave the management of senTice quality.
THE ROLE OF MOTIVATION IN LEARNING ENGLISH AS A FOREIGN LANGUAGE
Authors: Riyanti Dwi
Published: May 2019

Motivation is undoubtedly an important factor in learning foreign languages. Yet, in English as foreign language context, like Indonesia, especially in West Kalimantan, not all students are motivated to learn English, a compulsory foreign language for secondary students. Thus, it is a necessity that teachers know how to increase students’ motivation. This paper analyses the issue of motivation in learning English as a compulsory subject in a foreign language context which can be useful for teachers and students to know what why motivation is important in learning foreign languages. Through reviewing related literatures to motivation, this paper outlines the role of motivation in learning a foreign language, and the problems of low motivation commonly found in EFL contexts. It also discusses some possible causes of low motivation as well as elaborates ways to increase students’ motivation.
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Authors: Jeltim Jeltim
Published: May 2019

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Bio-Copolyesters of Poly(butylene succinate)(PBS) Containing Long Chain Bio-Based Glycol
Authors: Stępień Karolina , Miles Cathrine , McClain Andrew , Wiśniewska Ewa , Sobolewski Peter , Kohn Joachim , Puskas Judit E. , Wagner H. Daniel , El Fray Miroslawa
Published: May 2019

Poly(butylene succinate) (PBS) is a thermoplastic and biodegradable polyester characterized by high rigidity due to its high crystallinity. However, the use of long chain biobased monomers to produce segmented copolymers is an effective strategy to tailor the properties of PBS, such as greater flexibility. In this paper, a series of aliphatic bio-copolyesters of poly(butylene succinate-dilinoleic succinate) (PBS-DLS) were successfully synthesized via a direct two-step polycondensation method using a semi-pilot scale reactor for melt polymerization and titanium dioxide/silicon dioxide coprecipitate catalyst (C-94). In this study, the thermal and mechanical properties were investigated and compared, focusing on the effect of varying the amount of biobased dilinoleic diol in the structure. With increasing amount of long chain diol, a decrease in molecular weight, density, and melt flow index was observed. The semicrystalline nature of the copolymers was confirmed using differential scanning calorimetry (DSC) and dynamic mechanical thermal analysis (DMTA) methods. These copolymers exhibit two main transition temperatures and vary in softness and processing flexibility. Furthermore, in the DSC data a linear trend was observed with increasing wt.% of hard PBS segments, which can be described by the Gordon-Taylor equation. Increasing the soft DLS segment content in the copolymer series resulted in an increase in the elastic behavior of the polymers. The broad range of crystallization temperatures and melt flow index values indicates that a polyester library with customizable properties that spans PBS applications has been successfully obtained.
Targeted Adversarial Learning Optimized Sampling
Authors: Zhang Jun , Yang Yi Isaac , Noé Frank
Published: May 2019

Abstract Boosting transitions of rare events is critical to modern-day simulations of complex dynamic systems. We present a novel approach to modify the potential energy surface in order to drive the system to a user-defined target distribution where the free energy barrier is lowered. The new approach, called targeted adversarial learning optimized sampling (TALOS) combines the strengths of statistical mechanics and deep learning. By casting the enhanced sampling problem as a competing game between a real sampling engine and a virtual discriminator, TALOS enables unsupervised construction of bias potential on an arbitrary dimensional space and seeks for an optimal transport plan that transforms the system into target. Through multiple experiments we show that on-the-fly training of TALOS benefits from the state-of-art optimization techniques in deep learning, thus is efficient, robust and interpretable. Additionally, TALOS is closely connected to actor-critic reinforcement learning, giving rise to a new approach to manipulating the Hamiltonian systems via deep learning.
Copper-Catalyzed Benzylic C–H Coupling with Alcohols via Radical Relay
Authors: Hu Huayou , Chen Si-Jie , Krska Shane , Stahl Shannon
Published: May 2019

Cross coupling reactions enable rapid convergent synthesis of diverse molecules and provide the foundation for modern chemical synthesis. The most widely used methods employ sp2-hybridized coupling partners, such as aryl halides or related pre-functionalized substrates. Here, we demonstrate copper-catalyzed oxidative cross-coupling of benzylic C–H bonds with alcohols to afford benzyl ethers, enabled by mechanistic insights that led to a novel reductant-based strategy for in situ regeneration of the active copper catalyst. The reactions employ the C–H substrate as the limiting reagent and exhibit broad scope with respect to both substrate partners. This approach to direct site-selective functionalization of sp3 C–H bonds provides the basis for efficient three-dimensional diversification of organic molecules and should find widespread utility in organic synthesis, particularly for medicinal chemistry applications.
A linear-scaling method for non-covalent interactions
Authors: Shaw Robert , Hill Grant
Published: May 2019

A novel method for the accurate and efficient calculation of interaction energies in weakly-bound complexes comprised of a large number of molecules is presented. The new ALMO+RPAd method circumvents the prohibitive scaling of coupled cluster singles and doubles while still providing similar accuracy across a diverse range of intermolecular interactions. Tests on various dimers and the S66 benchmark set demonstrate results within 0.5 kcal/mol of coupled cluster singles and doubles results. On a large cluster of water molecules, we achieve calculations involving over 3500 orbital and 12000 auxiliary basis functions in under ten minutes on a single CPU core.
The Impact of Teacher’s Self-Efficacy on Student’s Motivation towards Science Learning
Authors: Ghaffar Shama , Hamid Shams , Thomas Martin
Published: May 2019

Purpose: The study aims to identify the role of teachers’ self-efficacy towards motivating students’ learning process in intermediate colleges of Karachi, Pakistan.

Design/Methodology/Approach: Using a causal research design, purposive sampling as a sampling technique and questionnaire as a data collection method, data were gathered from selected intermediates colleges of Karachi. The data from 312 sample cases were then analyzed by employing PLS-SEM through SmartPLS3 and results were identified.

Findings: The results of the current study showed that teachers’ self-efficacy has significantly positive effect on goal achievement active learning and learning environment. In addition, teachers’ self-efficacy was found to have significant positive impact on performance goal and science learning value.

Conclusion and Implications: By the initiation of proper training and working over the embracement of self-efficacy, the motivation of the students towards the learning of science, can be improved. The professional courses and teacher education programs to develop the sense of self-efficacy are also proposed by the professionals.
HUBUNGAN SELF-ESTEEM TERHADAP PERILAKU MENGKONSUMSI MINUMAN KERAS PADA WANITA PEMANDU LAGU (PL) DI TEMPAT-TEMPAT KARAOKE
Authors: Arisdiani Triana , Widyastuti Yuni Puji
Published: May 2019

Perilaku sek bebas, narkoba, dan mengkonsumsi minuman keras menyumbang tingginya masalah kesehatan pada Pemandu Lagu (PL). Perilaku tersebut dilakukan sebagai wujud pelayanan terhadap tamu oleh Pemandu Lagu (PL) yang datang di tempat karaoke. Penelitian ini bertujuan untuk mengetahui hubungan self esteem dengan perilaku mengkonsumsi minuman keras pada Pemandu Lagu (PL) di tempat-tempat karaoke. Desain penelitian ini menggunakan deskriptif korelasi dengan pendekatan cross sectional. Sampel diambil secara total sampling sebanyak 48 Pemandu Lagu (PL) di tempat-tempat karaoke. Alat penelitian menggunakan kuesioner, The Simple Rathus Assertiveness Schedule Questionnaire, Rosenberg Self-Esteem, dan Scale Alcohol Use Disorders Identification Test (AUDIT). Data dianalisis secara univariat dan bivariat menggunakan uji chi square. Hasil penelitian menunjukkan ada hubungan self esteem (ρvalue= 0,002; ρvalue<0,05) dengan perilaku mengkonsumsi minuman keras pada Pemandu Lagu (PL) di tempat-tempat karaoke. Semakin self esteem pemandu lagu baik, maka semakin terhindar dari perilaku mengkonsumsi minuman keras. Penelitian selanjutnya diharapkan meneliti variabel-variabel lain yang berkontribusi dengan perilaku Pemandu Lagu (PL) mengkonsumsi minum minuman keras melalui metode yang berbeda. Kata kunci: Perilaku mengkonsumsi minuman keras, pemandu lagu (PL) THE RELATIONSHIP BETWEEN SELF ESTEEM AND THE BEHAVIOR OF CONSUMING LIQUOR ON SONG GUIDES (PL) ABSTRACTFree-sex behavior, drugs, and drinking alcohol contribute to high health problems in Work as a Song Guide (PL). This behavior is carried out as a form of service to guests by a Song Guide (PL) who comes to a karaoke place. This study aims to determine the relationship between self esteem and the behavior of consuming liquor on Song Guides (PL) in karaoke places. The design of this study used descriptive correlation with a cross sectional approach. Samples were taken in total sampling with 48 Song Guides (PL) in karaoke places. The research tool used a questionnaire, The Simple Rathus Assertiveness Schedule Questionnaire, Rosenberg Self-Esteem, and the Alcohol Use Disorders Identification Test (AUDIT) Scale. Data were analyzed by univariate and bivariate using the chi square test. The results of the study show that there is a relationship between self esteem (value = 0.002; ρvalue <0.05) with the behavior of consuming liquor in Song Guides (PL) in karaoke places. The better the self-esteem of the song guide, the more avoid the behavior of consuming liquor. Further research is expected to examine other  variables that contribute to the Song Guide behavior (PL) consuming drinking through different methods. Keywords: Behavior consuming liquor, song guide (PL)