bluuebunny/crossref_metadata_2025 huggingface dataset:
An interprofessional approach to promoting autonomous decision-making for clients who are aphasic
Authors: Johnson Jessie , Westgate Sarah , Oliver Linda
Published: June 2019

Often times interprofessional health care team members presume individuals with aphasia due to stroke lack the capacity to participate in and contribute to decision-making. This belief may hinder the client’s participation in the decision-making process. Two main impairments resulting from stroke, that impede communication and limit capacity for autonomous participation in decision-making, are aphasia and cognitive deficits. Reduced capacity for communication in the client with stroke, combined with complexity in health team dialogue and process, may further diminish the individual’s ability to engage in autonomous decision-making. Health team members need to use reliable methods and devise new methods which can more accurately measure capacity for autonomous decision-making. This review elucidates the necessity for (1) autonomous decision-making in persons with aphasia, (2) assessing the need for capacity, (3) concrete ways to assess cognitive function, and (4) interprofessional team decision-making.
Absence of paramyxovirus RNA in non-human primate sanctuaries and a primatology center in Gabon
Authors: Ngoubangoye Barthelemy , Maganga Gael Darren , Boundenga Larson , Tsoumbou Thierry Audrey , Rougeron Virginie , Mombo Illich Manfred , Moukodoum Nancy Diamella , Fouchet David , Prugnolle Franck , Renaud François , Pontier Dominique
Published: June 2019

The viruses of the Paramyxoviridae family are known to infect a wide range of animals, including primates, birds, rodents,carnivores, bats, ungulates, snakes, cetaceans and humans. This study aims to investigate the circulation of paramyxoviruses in five potential host species groups (humans, non-human primates, rodents, shrews, and bats) living in the same environments in three conservation programs dedicated to non-human primates, namely the Lékédi park, the primatology center of the International Center for Medical Research of Franceville and the Gorilla Protection Program, located in Gabon. We tested 35 workers, 343 NHPs (8 species), 141 bats (4 species), 420 rodents (5 species) and 10 shrews, sampled between 2013 and 2014. Faecal and organ samples were analyzed using three heminested reverse transcription-PCR (hnRT-PCR). All the 1884 samples tested were negative for PV detection. Further studies spanning a greater period of time are needed to investigate PV circulation patterns in theseconservation programs.
A experiencia emocional de autoras de mommy blogs
Authors: De Almeida Schulte Andréia , Gallo-Belluzzo Sueli Regina , Aiello-Vaisberg Tânia Maria José
Published: June 2019

A presente pesquisa objetiva investigar psicanaliticamente a experiência emocional de mulheres que vivenciam a maternidade em contextos nos quais a opressão feminina apresenta caráter estrutural. Justifica-se tendo em vista a produção de conhecimentos relevantes para a clínica psicológica, vertentes psicoterapêuticas e psicoprofiláticas, e para debates que visam transformações sociais. Organiza-se ao redor do uso do método psicanalítico no estudo de dez postagens de mommy blogs, cuja consideração permitiu a produção interpretativa de dois campos de sentido afetivo-emocional ou inconsciente relativo às condutas: “dedicando-se exclusivamente” e “conciliando atividades”. O quadro geral sugere uma forte vinculação entre maternidade e sofrimento, ligando-se às exigências contemporâneas de uma maternidade enquanto única missão e destino feminino, mas de também desenvolver carreira profissional e contribuir financeiramente de modo significativo para o sustento familiar. Trata-se de uma situação que ocorre em diferentes classes, contextos culturais e situações geopolíticas, afetando não apenas a mulher, mas toda a família.
Motivação para aprender e compreensão de leitura em alunos do Ensino Fundamental I
Authors: Ferraz Adriana Satico , Cantalice Lucicleide Maria de , Santos Acácia Aparecida Angeli dos
Published: June 2019

O presente estudo investigou a associação da motivação para aprender na perspectiva das metas de realização (meta aprender e metas performances aproximação e evitação) com a compreensão de leitura. Participaram 98 alunos do 3° ao 5° ano do fundamental de duas escolas públicas do interior paulista. Os instrumentos utilizados foram a Escala de Avaliação da Motivação para a Aprendizagem e o teste de Cloze, aplicados coletivamente. Os resultados revelaram a existência de correlações significativas, positivas e de magnitude fraca, entre as metas performances e a compreensão de leitura. Correlações similares foram identificadas entre as notas de língua portuguesa e matemática e os escores da compreensão de leitura. Foram identificadas diferenças significativas para a adoção das metas performances relativas ao nível de compreensão de leitura e o ano escolar. Sugere-se a continuidade das investigações acerca das metas de realização para se ampliar o entendimento sobre os aspectos emocionais ligados à aprendizagem.
Escala de projetos de vida para adolescentes: evidências de validade de conteúdo
Authors: Gobbo Jessica Particelli , Nakano Tatiana De Cássia , Dellazzana-Zanon Letícia Lovato
Published: June 2019

A temática dos projetos de vida de adolescentes tem se mostrado um tema relevante na Psicologia, especificamente, na Psicologia do Desenvolvimento. Diante da lacuna de instrumentais que tenham esse objetivo, o presente estudo consistiu na investigação das evidências de validade de conteúdo da Escala de Projetos de Vida para Adolescentes (EPVA), em desenvolvimento. Para isso, cinco peritos no assunto atuaram como juízes, classificando os 116 itens do instrumento em sete dimensões: relacionamentos afetivos, estudo, trabalho, aspirações positivas, bens materiais, religião/espiritualidade e sentido da vida. A análise dos coeficientes de concordância demonstraram a adequação dos itens, sendo possível manter 88% da escala inicial. As análises dos coeficientes de Kappa evidenciaram índice de concordância acima de 0,75 para todos os juízes. Os resultados apontaram para a adequação da escala ao construto e dimensões que pretende avaliar.
Uma nova possibilidade de construção do conhecimento em Psicologia
Authors: Santos de Souza Leonardo , De Sousa Noguchi Cinthia , Bondezan Alvares Lucas
Published: June 2019

O número de ligas acadêmicas, definidas como organizações estudantis sem fins lucrativos, vêm crescendo no Brasil. No entanto, têm operado muitas vezes de modo incoerente com os objetivos preconizados pelo tripé universitário: ensino, pesquisa e extensão, sendo motivo de críticas constantes quando implementadas sem um processo crítico-reflexivo. O presente relato visa apresentar a experiência da Liga Acadêmica de Psicologia da Saúde (LAPS) em uma universidade no interior do Estado de São Paulo, destacando as práticas realizadas, os desafios e relevância deste novo recurso na formação do futuro psicólogo. Foi possível identificar que a LAPS contribuiu para a população local por meio da educação em saúde e que seus os desafios estão especialmente voltados à pesquisa. Nesse sentido, são necessários investimentos em produção científica e nos órgãos de representatividade das ligas universitárias, uma vez que as mesmas estão se apresentando como importantes ferramentas para a qualificação do futuro profissional.
Laboratórios e devires morais: experimentos para se viver uma boa vida
Authors: Clímaco Júlia Campos
Published: June 2019

Resenha do livro MATTINGLY, C. (2014) Moral Laboratories: Family Peril and the Struggle for a Good Life.  Oakland, California: University of California Press
Estudos brasileiros sobre o cotidiano no contexto da docência: uma revisão sistemática
Authors: Martins Andreia , Trindade Camila , Coutinho Maria Chalfin
Published: June 2019

O presente trabalho apresenta uma pesquisa de revisão sistemática em estudos brasileiros sobre a temática do cotidiano em contextos de docência, mais especificamente, sobre as abordagens teórico-metodológicas utilizadas nos mesmos. Foram selecionadas publicações indexadas nas bases de dados Portal de Periódicos da CAPES/MEC e no Scielo, no período de 2006 a 2015. Apesar da diversidade teórica de perspectivas sobre o cotidiano, verificou-se que os estudos produzidos no cenário brasileiro se ancoram nas teorias sobre o cotidiano de Michel de Certeau e de Agnes Heller. Em relação aos aspectos metodológicos os estudos analisados evidenciaram o uso de vários instrumentos de pesquisa, sendo a entrevista e a observação, as técnicas mais utilizadas. No que concerne à análise das informações em estudos brasileiros sobre o cotidiano, no contexto da docência, observou-se que a maioria dos estudos não reportam de forma detalhada como procederam a apreciação e o tratamento de seus dados.
A Contrapalavra em Processos de Revisão e de Reescrita
Authors: Menegassi Renilson José , Lima Nayara Emidio de
Published: June 2019

Neste estudo, objetivamos investigar como a contrapalavra configura-se nos discursos escritos de alunos e como os processos de revisão e de reescrita podem contribuir para a sua manifestação nos textos produzidos em situação de ensino. Para tanto, pautamo-nos na concepção dialógica de linguagem (BAKHTIN, 2003; BAKHTIN/VOLOCHINOV, 2010), bem como nas discussões acerca dos processos de revisão e reescrita (MENEGASSI, 1998; JESUS, 2004; RUIZ, 2010). No estudo, analisamos o processo de produção textual escrita do gênero discursivo resumo, realizadas por estudantes do Ensino Fundamental II, considerando: a) as orientações presentes no comando de produção; b) a primeira versão do texto do estudante; c) as correções efetuadas no processo de revisão docente; d) a segunda versão do texto produzido. Com a análise, pudemos verificar as transformações de “palavras alheias” em “palavras minhas” no processo de produção textual e as contribuições das correções da professora à produção dos alunos e à manifestação de contrapalavras nos resumos.
O trabalho com o gênero carta pessoal na Educação de Jovens e Adultos
Authors: Miranda Joseval Dos Reis , Ramalho Lindolfo Santos
Published: June 2019

O presente artigo aborda sobre o processo de escrita da carta pessoal por estudantes da Educação de Jovens e Adultos. Em um primeiro momento, tecemos reflexões sobre os gêneros textuais como estratégia para o ensino da escrita, e, em seguida mais especificamente expomos sobre a carta pessoal. Os nossos aportes teóricos constituíam-se de obras como Antunes (2003,2009), Cavalcante (2013), Dolz, Noverraz e Schneuwly (2004), Marcuschi (2002; 2008; 2010) e Oliveira (2014). A pesquisa foi desenvolvida por meio da abordagem qualitativa, na qual utilizamos a pesquisa participante, fazendo uso da observação participante e da roda de conversa. Foram colaboradores da pesquisa 05 estudantes da Educação de Jovens e Adultos, sendo 04 do sexo feminino e 01 do sexo masculino. Os resultados das análises apontaram que, a produção escrita da carta pessoal elaborada por meio da sequência didática desenvolvida por Dolz, Noverraz e Schneuwly (2004), possibilitou aos participantes da pesquisa a aquisição de conhecimentos linguístico-discursivos necessários à construção do gênero carta pessoal, bem como contribuiu para o reconhecimento e, ao mesmo tempo, para a superação das principais dificuldades por eles apresentadas durante o processo de escrita da carta pessoal.
Interfaces entre Lexicografia, Semântica e Tradução
Authors: Ortigoza Guidotti Arelis Felipe
Published: June 2019

Este artigo discorre sobre ligações possíveis entre Lexicografia, Semântica e Tradução. Por meio da experiência de elaboração de um dicionário bilíngue na direção português-espanhol, feito para brasileiros, foi constatada a necessidade de reflexão sobre a carga semântica atribuída a uma lexia na sua língua de origem, antes que fosse registrada num dicionário. Foi verificado que a Lexicografia segue os pressupostos da Semântica Formal, enquanto que a Semântica da Enunciação sugere que sejam registrados todos os significados de uma lexia de acordo com o(s) enunciado(s), o qual se torna inviável em um dicionário. Tampouco seria viável registrar todos os sentidos que a lexia tem para cada indivíduo, de acordo com a sua subjetividade, se o dicionário seguisse os pressupostos da Semântica Cognitiva. Por outro lado, a Tradução poderia beneficiar-se com maior liberdade das contribuições desses três modelos de análise semântica, já que, tanto na tradução intralinguística, como na interlinguística, busca-se a fidelidade ao enunciado original. Sendo assim, considera-se que um trabalho integrado entre especialistas da Lexicografia, da Semântica e da Tradução poderia trazer benefícios a todas estas áreas do conhecimento, podendo resultar num registro mais completo do(s) significado(s) de unidades léxicas em dicionários.
Análise dos fatores discriminantes do crescimento urbano dos municípios do sudoeste do Paraná no período 2000-2010
Authors: Fankhauser Édina , Melo Cármem Ozana de
Published: June 2019

Esta pesquisa propôs-se a analisar os motivos pelos quais alguns municípios da região sudoeste do Paraná apresentaram crescimento populacional, sendo mais dinâmicos, e outros tiveram taxas negativas de crescimento populacional. Logo, busca-se determinar os fatores que diferenciam os municípios com crescimento daqueles com crescimento negativo, a partir de características socioeconômicas, considerando dois períodos distintos – 2000 e 2010. Esta análise foi feita a partir da Análise Discriminante, dividindo os 42 municípios da região sudoeste em três grupos: dinâmicos (grupo 1), estáveis (grupo 2) e deprimidos (grupo 3). Foram determinadas oito variáveis selecionadas a partir de dados secundários obtidos através do IPARDES. Os resultados da pesquisa demostram que a discriminação entre os municípios ocorre por conta da concentração populacional (densidade demográfica) e o grau de industrialização. Ambos os fatores podem se tornar atrativos para novos habitantes que estão em busca de melhores condições de vida, melhores oportunidades de trabalho, aumento de renda e educação, ou seja, em busca de uma qualidade de vida melhor.
A Curva de Kuznets Ambiental para a região norte do Brasil entre os anos de 2002 a 2015
Authors: Almeida Matheus Gama de , Lobato Tarcísio da Costa
Published: June 2019

A Região Norte brasileira tem sido centro de debates socioambientais por concentrar a maior parte da Amazônia Legal e nela estar ocorrendo um grande crescimento de atividades agropecuárias, florestal, mineral, industrial e outras atividades urbanas. Esta ampliação tem gerado vários impactos e um deles é a deterioração do meio ambiente. Neste ensejo, o presente estudo tem o intuito de modelar uma Curva de Kuznets Ambiental para a região Norte do Brasil para o período 2002 a 2015. Para isso, foram coletados dados sobre o PIB per capita – proxy de crescimento econômico - no IBGE e SIDRA. E os dados anuais da emissão de CO2 – proxy da degradação ambiental - para os sete estados da região norte, foram obtidos através do SEEG. Para a análise dos resultados foi utilizado o método de dados em painel. Verifica-se que Rondônia e Acre possuem as maiores variabilidades de emissão de CO2 nos anos estudados e que Roraima, Pará, Amapá e Tocantins mantiveram uma variabilidade pequena entre os anos. Esses resultados também semelhantes aos encontrados no PIB per capita. Sobre o formato da CKA para a região Norte do Brasil, conclui-se que ela se apresenta na forma de um U não invertido, como proposto na teoria.
Um estudo acerca do perfil de consumo cultural dos alunos da Universidade Federal do Ceará
Authors: Sales Thiago Andrade , Castelar Pablo Urano de Carvalho , Benevides Alesandra de Araújo
Published: June 2019

Este trabalho busca estudar o comportamento de consumo de bens culturais pelos alunos da Universidade Federal do Ceará - UFC. Utilizou-se como forma de captura e instrumentalização dos dados o uso de um questionário para que fossem observados aspectos econômicos e sociais dos agentes, assim como perguntas mais direcionadas à sua forma de consumo cultural, frequência de uso e grau de importância desses bens. A partir disso, foi elaborado um modelo probit em que se analisa o comportamento do consumo de bens culturais mediante algumas variáveis exógenas como: a utilização de bens culturais dentro da universidade; anos de estudo nos cursos de graduação na universidade; idade dos estudantes; renda e sexo. Verificou-se que a utilização de bens culturais disponibilizados pela universidade tende a aumentar o consumo de bens culturais, assim como em relação aos anos de estudo dos agentes nos cursos de graduação. No entanto, à medida que os alunos aumentam de idade, seu consumo de cultura tende a diminuir, e parece haver um desconexo entre disponibilidade de equipamentos culturais e percepção dos discentes a respeito desta oferta.
Impact of Process Oriented Business Culture in Transforming Organizational Performance: A Case of Texaco
Authors: Al Dousari Shafi F.
Published: June 2019

The rapid advent of industrialization has confronted majority of the people with complexity and novelty of their respective organization. They are forced to cope up with an increasing number of tasks along with the open dynamic processes and changing parameters. The present study aims to evaluate the perceptions regarding Texaco’s learning culture and the role of learning cultures in achieving organizational transformation. The study also investigates national and non-national respondents employed at Texaco’s facility in Neutral Partition Zone between Saudi Arabia and Kuwait. The study has employed mixed research design using a survey based on 3-point Likert scale. The questionnaire was designed to examine the employee behavior and organizational support, whereas personal interviews were conducted for examining the awareness of employees towards the learning organization models. The results showed significant level of employee participation (p-value 0.049), commitment (0.068), innovation (p-value 0.033) and feedback (0.025). Whereas, the interview results showed that employees had a higher degree of awareness regarding organizational learning models. However, they requested training sessions for learning how to implement these models. These results have clarified that Texaco has evolved into an innovative and culturally diverse organization following Chevron’s takeover. Therefore, the study has concluded that Texaco employs knowledge sharing learning models through their knowledge management (KM) initiatives.
Assessment of Optimal Pedagogical Factors for Canadian ESL Learners’ Reading Literacy Through Artificial Intelligence Algorithms
Authors: Xiao Ya , Hu Jie
Published: June 2019

The current study explored the effective pedagogical factors that distinguish high-achieving from low-achieving ESL (English as a second language) primary school learners in reading literacy in Canada. In total, 203 samples (167 high-achieving learners and 36 low-achieving learners from 128 primary schools) in the 4th grade were drawn from the public database of Progress in International Reading Literacy Study (PIRLS) 2016, which is the benchmark for large-scale assessments of reading literacy targeting fourth-grade students. For the first time in the ESL-related research, this study applied an artificial intelligence approach, support vector machine (SVM), to concurrently analyze 41 pedagogical factors associated with reading materials, classroom organization, reading strategies, in-class reading activities and post-reading activities. The overall 41 factors collectively distinguished the high-achieving readers from the low-achieving readers with a high accuracy score (0.793) via SVM. Then, these 41 factors were ranked according to their contribution to the SVM model through SVM-based recursive feature elimination (SVM-RFE). Eventually, an optimal factor set was selected by the SVM-RFE cross validation, which contained 10 effective pedagogical factors centered on reading materials, reading strategies and in-class reading activities for fourth-grade high-achieving ESL learners in reading literacy. Suggestions based on solid data analysis would facilitate infrastructural and pedagogical improvements in ESL reading education.
Effects of Nitrogen Fertilization and Water Replacement Level on the Production of Gladiolus Corms in a Protected Environment
Authors: Koetz Marcio , Porto Rebeca de Andrade , Bomfim-Silva Edna Maria , Polyzel Analy Castilho , Silva Tonny Jose Araujo da
Published: June 2019

The objective of this study was to evaluate the effects of water replacement levels (50, 75, 100, 125 and 150%; for the 100% level, the water replacement volume was at field capacity) and nitrogen doses (0, 30, 60, 90, and 120 mg dm-3) on the production of gladiolus (Gladiolus grandiflorus L.) corms, White Friendship variety. The project was developed in a protected environment using a randomized complete block design witha 5x5 factorial scheme (water replacement levels × nitrogen doses). The evaluated variables werecorm diameter and weight and cormel number and weight. The data were assed using analysis of variance F-test at 5% probability and a regression analysis using the Sisvar statistical program. There was no nitrogen fertilization effect on the analyzed variables. The water replacement levels had a significant effect. For corm weight, the water replacement level that led to the highest weight was 128.96%. The weight and number of cormels were fit using an increasing linear regression model. According to Brazilian commercial corm standards, quality corms with diameters that suggest good potential for floral stem production were observed starting at the 50% water replacement level.
Interference of Urochloa plantaginea on Morphophysiology and Yield Components of Black Beans
Authors: Franceschetti Milena Barretta , Galon Leandro , Bagnara Maico André Michelon , Pawelkiewicz Renan , Brunetto Leonardo , Rezende Adilson Lemos , Portes Juliane Cervi , Soligo Vinicius , Perin Gismael Francisco , Toso Janaíne Oliveira , Júnior Francisco Wilson Reichert , Forte César Tiago
Published: June 2019

Among the factors which affect crop productivity, there are weeds which compete for environment resources. The objective of this work was to determine the periods of interference of alexandergrass on the morphophysiology and productivity components of black beans. The experiment was conducted in a complete randomized block design with four replications. The bean cultivar of the black type used was IPR Uirapuru, being the treatments separated in two models of interference: in the coexistence group, the crop of the bean lived with the alexandergrass by growing periods of 0, 7, 14, 21, 28, 35, 42 and throughout the cycledays after emergence and throughout the cycle; in the control group the crop was kept free of the infestation for the same periods described previously. At 42 DAE were evaluated the variables related to plant morphology and physiology (height of bean plants, number of trifoliate leaves, dry mass plant, number of grains pods, number od pods plants, stomatal conductance, internal CO2 concentration, photosynthetic activity, efficiency of carboxylation, efficient use of water, transpiration rate). Considering the results, it is possible to conclude that the critical period of interference prevention (CPIP) comprises 24 to 50 DAE, the period before the interference (PBI) was 24 DAE and the total period of interference prevention (TPIP) was 50 days and that the morphological and physiological variables of the plants were negatively affected in the coexistence with the alexandergrass when compared to the treatments kept free of weeds throughout the crop cycle.
Emergency and Growth of Andiroba Seedlings (Carapa guianensis Aubl.) in Function of the Seeds
Authors: Brito Alane Cristina Peixoto de , Sousa Antonia Jucineia Braga , Silva Raimundo Thiago Lima da , Braga Nathalia Sousa , Monfort Lucila Elizabeth Fragoso , Júnior Marcos Vinicius Reis de Oliveira , Pereira Wanderson Cunha , Paiva Andressa Pinheiro de , Nascimento Vitor Resende do , Neto Cândido Ferreira de Oliveira
Published: June 2019

Andiroba (Carapa guianensis Aubl.-Meliaceae) is considered an Amazonian forest species with great potential for multiple use in natural forests. Because it is a native species of the Amazon rainforest, it has great socioeconomic importance for the extractive population due to the oil extracted from its seeds. The speed of emergence is an important factor in the establishment of seedlings, since the longer the seeds remain inside the soil, the seeds are in the soil, the greater the chances that the seeds will be attacked by fungi and soil insects. The objective of this work was to determinate the speed of andiroba emergence (Carapa guianensis Aubl.) seedlings and the development. The experiment was carried out in a greenhouse belonging to Federal Rural University of Amazonia (UFRA)-Capitão Poço, Brazil. Fruits of C. guianensis were collected in floodplain areas in northeastern of Pará. The treatments were arranged according to the seed mass. Were calculated 5 variables after sowing (emergence speed index; height; interference of the mass of andiroba seeds at the height of the seedlings stem; interference of the mass of andiroba seeds in the number of leaves; interference of the mass of andiroba seeds in the number of leaflets). The experimental design was completely randomized, consisting of 4 treatments with 5 replicates with 5 seeds per replicate (5 seeds per vessel), totaling 25 seeds per treatment. The data were statistically analyzed using the Tukey test at 5% probability with the software Assistat 7.6. The seed mass classes did not influence ESI (Emergence Speed Index). The seed mass promoted significant effects on 4 variables. The mass of the seeds of andiroba does not influence the ESI of seedlings for it own production. The heavy and very heavy seeds generated more developed plants.
Growth and Gas Exchange of Cucurbita pepo L. Under Nitrogen and Silicon Fertilization
Authors: Alves Jackson de M. , Lima Alex S. de , Suassuna Cesenildo de F. , Figueiredo Francisco R. A. , Silva Toshik Iarley da , Mesquita Evandro F. de , Cavalcante Lourival F. , Mesquita Francisco de O.
Published: June 2019

Zucchini (Cucurbita pepo L.) is a horticultural crop of great socioeconomic importance in Brazil and in the world. However, inappropriate fertilization management, such as over-fertilization of soils, may become a limiting factor for its development. Thus, the aim of this study was to evaluate the morpho-physiological behavior of zucchini submitted to nitrogen (N) doses applied via soil and foliar application of silicon (Si). The treatments were distributed in split-plot scheme in a randomized block design, with three replications. The plot was formed by silicon levels (0.0 and 6.0 g plant-1) and the subplots constituted by five nitrogen levels (30, 60, 90, 120 and 150 kg ha-1), adding up to 30 experimental units. Gas exchanges and growth parameters were assessed at 35 days after planting. The data were submitted to analysis of variance by the F test and in the cases of significance was performed a polynomial regression analysis for the nitrogen factor and Tukey test for the silicon factor. The supply of Si positively enhances the effects of N on growth characteristics and gas exchanges of zucchini. The simultaneous application of Si and N does not influence the leaf area of zucchini. The N dose of 93.9 kg ha-1 provides greater assimilation of CO2 in zucchini plants under the conditions in which the experiment was performed.
Verhaalsbeslag op bitcoins
Authors: de Graaf Tycho
Published: June 2019

Verhaalsbeslag op bitcoins

Verhaalsbeslag op bitcoins is mogelijk door (1) de drager waarop de privésleutel staat waarmee over bitcoins kan worden beschikt (de paper of hardware wallet) als waardepapier te kwalificeren, (2) op die wallet conservatoir verhaalsbeslag te leggen en als de toegang tot die wallet beveiligd is met een code, de schuldenaar te dwingen die code prijs te geven, (3) de bitcoins naar een andere, door een bank of DNB nieuw geopende bitcoinrekening over te maken, en (4) de paper of hardware wallet van die nieuwe bitcoinrekening te zijner tijd executoriaal te verkopen.
Ag-induced a New Raman Mode in ZnO Microrods
Authors: WANG Jing , WANG Lina , WANG Meina , ZHOU Dan , MEI Yan , HUANG Wenzhuo , XING Tian , GE Shengxu , CHEN Yuntong , YU You , LUAN Zhongqi , QU Bing , BAI Yaxiang , PAN Chao , TANG Delong , ZHU Na , QIU Yu , HU Lizhong
Published: June 2019

The chemical vapor deposition technique was used to prepare the Ag doped ZnO microrods, which were located on Si substrates at two different positions.  The scanning electron microscopy revealed that the samples have a clear hexagonal shape. X-ray diffraction provided information about the preferential orientation along the c-axis. The Raman analysis revealed that a new Raman mode appears at 492 cm-1 due to Ag doping. As this mode has not been reported early, it could be used as a characteristic mode of Ag doping in Raman spectrum. The red shift of the E2 (high) mode proves the existence of tensile stress in the samples. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.19130
Simulation on the Two-phase Separation of Powder Injection Molding 316L Stainless Steel
Authors: SHANG Feng , QIAO Bin , DONG Yan-feng , CAO Zhen-wei , SUN Wei , HE Yi-qiang
Published: June 2019

By utilizing the FLUENT software, finite element simulation analysis was performed on the two-phase separation of powder injection molding, and the simulation results were verified through experiment. As indicated in the simulation results, the optimal process parameters for the injection molding of 316L stainless steel sample were to inject at 70 MPa and 140 °C, at an injection speed of 3.49 cm3/s. Under these conditions, the maximum average solid volume fraction in observation area of the sample was 57.68 %. Additionally, it was discovered that while preparing 316L stainless steel was prepared by powder injection molding, the smaller the average porosity of the sample, the greater the Vickers hardness. And then the higher the average solid volume fraction simulated the slighter the two-phase separation between the powder and the binder. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.19137
Preparation and Electrochemical Testing of Polyaniline (PANI) Nanoparticles with Uniform Morphology and Good Dispersion in a Water-task-specific Ionic Liquid Medium
Authors: ZHANG Dingjun , CHEN Yuxian , BAI Xue , LI Xianwen , MA Yingxia , CHEN Zhenbin
Published: June 2019

Polyaniline (PANI) nanoparticles with uniform morphology and good dispersion were prepared by using the task-specific Ionic Liquid (IL) 1-ester-3-methyl-imidazolium tetrafluoroborate ([EAMIM]BF4) as a soft template by chemical oxidation in a water-IL medium. The morphological, structural and electronic properties of polyaniline (PANI) products, controlled by the IL [EAMIM]BF4, were synthesized and investigated. Products were characterized by SEM, FT-IR and the measurements of conductivity. The addition of [EAMIM]BF4 strongly influenced the morphology, uniformity, and conductivity of the PANI. Depending on the [EAMIM]BF4:ANI ratio, various nanostructures of PANI could be prepared and the dominant morphologies are the rod-like and fiber-like elongated structures under most experimental conditions. Samples prepared in the presence of IL [EAMIM]BF4 show uniform morphology, good dispersion and good electrochemical performance. At the current density of 0.5 A/g, the specific capacitance of PANI was 396 F.g-1. Compared with the PANI without ionic liquids, the specific capacitance was increased by 165 F.g-1. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.19145
Influence of Graphene Sheet on Microstructure and Properties of Ni-based Alloy Coatings Prepared by Laser Cladding
Authors: TIANYUAN Geng , WANG Cunshan
Published: June 2019

Ni-based alloy cladding layers with different graphene sheet additions were prepared by laser cladding on the 40CrNi2Si2MoV steel substrate. The influence of the graphene sheet on the microstructure and properties of the cladding layers was investigated. The results show that owing to the diffusion-reaction dissolution, the graphene sheet addition does not bring a corresponding change in the phase constitutions of the cladding layers, i. e., the cladding layers are still composed of γ-Ni, Ni3B, and M7C3 phases. But what has changed is that the solidified structure is refined, and the volume fractions of the eutectic and the carbide are increased with the increase of graphene sheet addition. As a result, the hardness and the wear resistance of the cladding layers gradually increase, whereas the friction coefficient firstly decreases and then increases, with the lowest friction coefficient obtained at 0.5 vol.% graphene sheet addition. Compared to the Ni-based alloy cladding layers with micro-size graphite additions, the studied cladding layers exhibit improved hardness and wear resistance, good forming quality, and increased friction coefficient. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.19173
Enhancement of Mechanical Properties and Corrosion Resistance of Ultra-Fine Grain Al0.4FeCrCo1.5NiTi0.3 High-Entropy Alloy by MA and SPS Technologies
Authors: YANG Shaofeng , ZHANG Yan , YAN Xing , ZHOU Hang
Published: June 2019

Al0.4FeCrCo1.5NiTi0.3 high-entropy alloy (HEA) was prepared by mechanical alloying (MA) and spark plasma sintering (SPS), which were evaluated in this study by XRD and TEM. After SPS, the bulk alloy exhibited a structure with a dominant fcc phase, a minor volume fraction of bcc phase, and the formation of TiAl3 intermetallic compound. Deformation twinning was observed in the fcc phase in the bulk HEA. The latter had a compressive strength, strain and Vickers hardness of 2225 ± 15 MPa, 17.52 ± 0.50 % and 515 ± 16 HV, respectively. The corrosion resistance studies indicated that Al0.4FeCrCo1.5NiTi0.3 with ultra-fine grained micro-structure was easier to passivate and possessed excellent corrosion resistance. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.19452
Tribological Behavior of Cermet Coatings Deposited from Submicron WC-10Co-4Cr Powders Using HVOF Spraying
Authors: HONG Sheng , WU Yuping , WANG Bo
Published: June 2019

In this paper, we prepared cermet coatings deposited from submicron WC-CoCr powders using high-velocity oxygen-fuel (HVOF) spraying process. The detailed microstructures, slurry erosion and sliding wear resistance of as-sprayed coatings were investigated. The slurry erosion test was performed in a rotating disk rig facility with circulating system using distilled water and 3.5 wt.% NaCl slurries. The sliding wear properties were evaluated by a pin-on-disk tribometer under different loads. The results showed that submicron coatings exhibited higher slurry erosion resistance in distilled water slurry than that in 3.5 wt.% NaCl slurry after three tests. The slurry erosion mechanism of the coatings was characterized by scratches and pull-out of carbide particle. With increasing load (from 10 N to 50 N), the coatings showed a reduction in average friction coefficient (from 0.52 to 0.44), and an increase in mass loss (from 3.3 mg to 11.4 mg). The evolution of the sliding wear characteristics of the coatings with the increase of the load was micro-cracks, carbide particle pull-out, spallation, and massive exfoliation. The sliding wear mechanism of the coatings under different loads was primarily abrasive wear. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.19507
Electrochemical Comparative Characteristics of La(Fe,Si)13 Type Materials with Different Content of Co in Acidified Phosphate Environment in Presence of Cl- Ions
Authors: KLIMECKA-TATAR Dorota , PAWŁOWSKA Grażyna , RADOMSKA Klaudia , GĘBARA Piotr
Published: June 2019

In the paper the electrochemical characteristics of alloys based on La(Fe,Si)13 phase have been presented. The material for research was the LaFe11.8-xCoxSi1.2 alloy with different cobalt content. Presented electrochemical characteristics provide information about pitting corrosion. This kind of corrosion is one of the most common local corrosion, it is especially undesirable for multi-phase alloys based on rare earth elements, as it contributes to the sudden and unexpected destruction of the surface of the material in working conditions. In the paper the results of potentiokinetic corrosion tests determined for LaFe10.72Co1.08Si1.2 and LaFe11.00Co0.8Si1.2 alloys in acidified phosphate solution (pH = 3) with different addition of chloride ions (Cl-) have been presented. Also analysis of alloys surface before and after corrosion measurement have been presented. The surface analysis have been carried out on the basis of profilometric roughness tests and optical microscopy observation. The studies have shown low resistance of LaFe10.72Co1.08Si1.2 and LaFe11.00Co0.8Si1.2 alloys to pitting corrosion, which, however, increases with Co content increase. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.19536
Preparation of Foamed Phosphogypsum Lightweight Materials by Incorporating Cementitious Additives
Authors: WANG Ting , GAO Xiaojian , WANG Jian
Published: June 2019

As a byproduct of phosphoric acid industry, phosphogypsum has many environmental problems. In order to recycle phosphogypsum to manufacture lightweight building materials, cementitious additives including fly ash, ground granulate blast-furnace slag and Portland cement were added to improve strength and water-resistance and different volume of foam was added to reduce the bulk density. The results show that hydrated lime can improve mechanical strength and water resistance of PG paste and the optimal dosage of hydrated lime is 6 %. Higher addition of fly ash or ground granulated blast-furnace slag improves the fluidity and delays the setting time of PG paste. The addition of 10 ~ 20 % fly ash results in a little reducing influence and 10 % ground granulated blast-furnace slag leads to an increase of 20.7 % for 28 days compressive strength of hardened PG specimen. The higher addition of Portland cement results in the better mechanical strength and water resistance of PG specimens. The 28day compressive and flexural strength reaches 25.9 MPa and 8.9 MPa respectively for the 25 % Portland cement mixture. PG based lightweight building materials can prepared by the addition of 60 % volume of air foam, with compressive strength of 1.7 MPa, bulk density of 521.7 kg/m3 and thermal conductivity of 0.0724 W/(m·K). DOI: http://dx.doi.org/10.5755/j01.ms.25.3.19910
First-principles Calculation of the Electronic Structure and Optical Properties of ZnO Co-doped with Nb and Ta
Authors: WANG Jinpeng , SHEN Tao , LIU Hongchen
Published: June 2019

First-principle calculations have been performed to investigate the electronic structure and optical properties of ZnO co-doped with Nb and Ta. The three doping structures are set to: Zn0.9375Nb0.0625O, Zn0.9375Ta0.0625O and Zn0.875Nb0.0625Ta0.0625O. The experiments show that co-doping with Nb and Ta narrows the band gap. And it causes the Fermi level to shift upwards and enter the conduction band, while enhancing the conductivity of the doped system. In addition, it has been determined that the dielectric imaginary part of the dopant system is larger than that of the pure ZnO in the low energy region. The absorption side of the dopant system, on the other hand, exhibits a redshift. Furthermore, the transmittance of the ultraviolet region is significantly increased, and the function loss spectrum appears to redshift. This will provide a good theoretical basis for the study and the applications of photoelectric materials co-doped with Nb and Ta. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.19956
Effect of Room Temperature Ionic Liquids for Electroless Nickel Plating on Acrylonitrile Butadiene Styrene Plastic
Authors: URAZ Canan
Published: June 2019

In this study, electroless nickel (EN) plating on acrylonitrile butadiene styrene (ABS) engineering plastic using room temperature ionic liquids (RTIL) was studied. Electroless plating is a fundamental step in metal plating on plastic. This step makes the plastic conductive and makes it possible to a homogeneous and hard plating without using any hazardous and unfriendly chemical such as palladium, tin, etc. In the industry there are many distinct chemical materials both catalysts and activation solutions for the electroless bath which is one of the most important parts of the process. In this study the effects of the ionic liquid, plating time, and sand paper size were investigated on electroless nickel plating. The etching and the plating processes were performed with environmentally friendly chemicals instead of the chromic and sulphuric acids used in the traditional processes. Experiments were carried out with and without ionic liquid, EMIC, 1-ethyl-3-methyl imidazolium chloride (C6H11N2Cl), and with 400, 500 and 800 grit sandpaper with the application of the sand attrition process and 70, 80, and 90 °C bath temperatures with 30, 60, and 90 minutes of deposition time. The surface morphology and the thickness of deposit analysis were performed using the Fischer scope X-Ray XDL-B System, X-ray Diffraction (XRD), and Scanning Electron Microscopy (SEM). Due to the results of the experiments and analysis, the electroless nickel plating on ABS plastic was a success. The best plating was obtained at 5.010 μm as the maximum plating thickness, at 90 min of plating time and 80 °C as the plating bath temperature for electroless nickel plating on ABS plastic whit the surface activated with 800 grit sandpaper using EMIC ionic liquid. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20116
Effect of Solution Heat Treatment and Artificial Aging on Compression Behaviour of A356 Alloy
Authors: MANICKAM Dhanashekar , VELUKKUDI SANTHANAM Senthil Kumar
Published: June 2019

Aluminium alloys are subjected to heat treatment to increase the strength and corrosion properties. This paper aims to study the effect of heat treatment on the compression behaviour of A356 alloy under quasi static condition and barreling effect. The various heat treatments are: (i) solution heat treatment of 1 h at 540 °C + natural aging 0 h + artificial aging at 180 °C up to 5.5 h, (ii) solution heat treatment of 3 h at 540 °C + natural aging for 20 h + artificial aging at 180 °C up to 5.5 h, and (iii) solution heat treatment of 6 h at 540 °C + natural aging for 20 h + artificial aging at 180 °C up to 5.5 h. Specially to understand the influence of artificial aging at every 0.5 h up to 5.5 h, the specimens were heat treated. From the results, solutionizing for 1 hr have a better compression strength irrespective of the artificial aging. Natural aging had decreased the ductility but increased the strength property. Artificial aging had a significant effect on the compressive strength and peak strength were obtained at 4 h irrespective of solutionizing heat treatment. Compressive strength increased by 33 % for 1 h of solutionizing and 4 h of artificial aged specimen when compared to non-heat treated alloy. Two mathematical relations discussed in literature were used for calculating the radius of the barreled surface followed by validation. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20442
Biodegradation of Wood Treated with Copper Based Preservative by Two Dematiaceous Fungi: Alternaria Tenuissima and Ulocladium Consortiale
Authors: RAUDONIENĖ Vita , BRIDŽIUVIENĖ Danguolė , MALACHOVSKIENĖ Eglė , LEVINSKAITĖ Loreta
Published: June 2019

As cases of treated wood colonization by fungi still happen, the understanding of fungal survival abilities could contribute in the creation of new efficient preservatives. For that reason, two dematiaceous fungi Alternaria tenuissima and Ulocladium consortiale isolated from treated wooden joists with discolorations were tested for their wood decomposition ability and tolerance to a copper based preservative. Our results indicated that the copper based preservative failed to suppress completely cellulose and lignin biodegradation by discoloring fungi studied in wood. Moreover, cellulose degradation was higher in the treated sawdust for both fungi after 30 days than in the untreated. Comparing the results of two strains U. consortiale that is little studied as a wood decomposer, was stronger lignin degrader than A. tenuissima in treated and untreated sawdust. The copper sulphate tolerance test showed that both fungi were able to grow up to 7 mM concentration in a solid medium. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20563
Milling Processes and Hydrogen Storage Properties of Mg-Graphene Composites
Authors: KWAK Young Jun , CHOI Eunho , SONG Myoung Youp
Published: June 2019

Graphene was chosen as an additive to improve the hydrogen uptake and release properties of magnesium (Mg). Five weight percent of graphene was added to Mg or pre-milled Mg by milling in hydrogen (reactive milling). The milling processes and hydrogen uptake and release properties of the graphene-added Mg were investigated. Adding graphene to Mg and then milling the mixture of Mg and graphene in hydrogen for 6 h [named M5G (6 h)] had little effects on the improvement of hydrogen uptake and release properties of Mg. Pre-milling of Mg (for 24 h) and then adding 5 wt.% of graphene by milling in hydrogen (for 30 min) (named M5G) significantly increased the hydrogen uptake and release rates and the quantities of hydrogen absorbed and released for 60 min of Mg. The activation of M5G was completed after cycle number, CN, of two (CN = 2). M5G had a high effective hydrogen-storage capacity of 6.21 wt.% at 623 K in 12 bar H2 at CN = 3. M5G released 0.25 wt.% hydrogen for 2.5 min and 5.28 wt.% hydrogen for 60 min H2 in 1.0 bar H2 at 623 K at CN = 3. Pre-milling of Mg and then adding graphene by milling in hydrogen and hydrogen uptake-release cycling are believed to create defects, produce cracks and clean surfaces, and decrease particle sizes. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20567
Characterization, Production and Microwave Absorbing Properties of Polyaniline-NiFe2O4: Tb Composites
Authors: ŞAHIN Ethem İlhan , PAKER Selcuk , KARTAL Mesut
Published: June 2019

In this study, terbium-doped NiFe2O4 was produced by using mixed oxide technique. The Ni1-xTbxFe2O4 composition was synthesized and x was selected as 0.025, 0.050 and 0.070, respectively. The single phase Ni ferrite was produced after sintering at 1250 °C for 4 h. X-ray diffraction (XRD), scanning Electron Microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) were performed for the structural analysis. The results of the structural analysis indicated that second phase did not form in Ni1-xTbxFe2O4. Additionally, the polyaniline-terbium doped NiFe2O4 composites were produced by hot pressing using the compositions of Ni0.975Tb0.025Fe2O4.018, Ni0.950Tb0.050Fe2O4.037, Ni0.93Tb0.070Fe2O4.0525 and aniline. The weight ratios of terbium-doped nickel ferrite and aniline were 1:1 and 1:3 respectively and epoxy resin was used to produce microwave absorbing composites. The magnetic properties of fabricated composites were investigated using a vibrating sample magnetometer (VSM). The microwave absorbing performances of Polyaniline-NiFe2O4: Terbium composites were investigated by reflectivity in 0 – 8 GHz using two–port vector network analyzer. A minimum of – 39.41 dB reflection performance was obtained in 7.9 GHz at the thickness of 2.0 mm. This reflection performance can be modulated simply by controlling the content of polyaniline in the samples for the required frequency bands. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.20810