bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effect of Nb and V on Austenite Grain Growth Behavior of the Cr-Mo-V Steel for Brake Discs
Authors: Wu Dan , Wang Fuming , Cheng Jin , Li Changrong 
Published: June 2018

AbstractIn order to improve the performance of the steel for brake discs, including strength, toughness and thermal fatigue resistance, Nb and V are added to the steel. The effect of Nb and V on austenite grain growth behavior of the Cr-Mo-V steel for brake discs was studied by analyzing the phase equilibria as well as the microstructures. The precipitation behaviors of precipitates were also investigated based on transmission electron microscopy and energy-dispersive spectroscopy. The results showed that V-rich M8C7 and NbC particles existed at the experimental temperatures. The abnormal grain growth in Nb-free steels was affected by the partial dissolution and coarsening of M8C7 particles. With increasing V content, the grains were refined, but the mixed grain phenomenon became more serious. There were many small NbC particles in Nb-bearing steel, so the grains were effectively refined. Furthermore, a prediction model, which calculates the austenite grain size considering precipitate pinning effect, was established, and the model was well consistent with the actual situation in the Nb-bearing steel up to 1,100 °C. The grains of the Nb-free steels were sensitive to the increments of temperature and time due to the rapid dissolution or coarsening of M8C7 particles.
Flow Modeling of Well Test Analysis for a Multiple-fractured Horizontal Well in Triple Media Carbonate Reservoir
Authors: Wang Yong , Yi Xiangyi 
Published: June 2018

Abstract
Carbonate reservoir is one kinds of important reservoir in the world. Because of the characteristics of carbonate reservoir, horizontal well, and acid fracturing became a key technology for efficiently developing carbonate reservoir. Establishing corresponding mathematical models and analyzing transient pressure behaviors of this type of well-reservoir configuration can provide a better understanding of fluid flow patterns in formation as well as estimations of important parameters. A coupling mathematical model for a fractured horizontal well in triple media carbonate reservoir with three kinds of reservoir outer boundaries by conceptualizing vugs as spherical shapes is presented in this article, in which the infinite conductivity of the acid fractures is taken into account. A semi-analytical solution is obtained in the Laplace domain by using source function theory, Laplace transformation, discretization of fracture, and superposition principle. Analysis of transient pressure responses indicates that several characteristic flow periods of fractured horizontal wells in triple media carbonate reservoir can be identified. Parametric analysis shows that fracture half-length, fracture number, fracture spacing, conditions of reservoir outer boundary, and so on can significantly influence the transient pressure responses of fractured horizontal wells in triple media carbonate reservoir. The model presented in this article can be applied to obtain important parameters pertinent to reservoir or fracture by type curve matching, and it can also provide useful information for optimizing fracture parameters.
Western Pyrenees geodetic deformation study using the Guipuzcoa GNSS network
Authors: Martín Adriana , Sevilla Miguel , Zurutuza Joaquín 
Published: June 2018

Abstract
The Basque Country in the north of Spain is located inside the Basque-Cantabrian basin of the western Pyrenees which remarkable seismic-tectonic implications justify the need of geodetic control in the area. In order to perform a crustal deformation study we have analysed all daily observations from the GNSS permanent network of Guipuzcoa and external IGS stations, from January 2007 to November 2011. We have carried out the data processing applying double differences methodology in the automatic processing module BPE (Bernese Processing Engine) from Bernese GNSS software version 5.0. Solution was aligned to geodetic reference framework ITRF2008, by using the IGS08 solution and updated satellite and terrestrial antennas calibration. This five years network study results: Coordinate time series, velocities and baseline lengths variations show internal stability among inner stations and from them with respect to outer IGS stations, concluding that no deformations have been observed.
Factors Influencing the Use of Digital Libraries in Distance Education in Ghana
Authors: Owusu-Ansah Christopher M. , Rodrigues Antonio , Van Der Walt Thomas 
Published: June 2018

Abstract
The purpose of this study was to explore the extent to which individual factors such as academic tasks, preference for print sources and information skills influence distance learners’ use of digital libraries in a teacher distance education programme at the University of Education, Winneba in Ghana. The population of the study consisted of 1,834 distance students and from a sample size of 641 distance learners spread across three distance study centers, namely, Winneba (247), Kumasi (276) and Asante-Mampong (118). A total of 453 (70.67 percent) distance learners, selected randomly, completed a 31-item questionnaire. In addition, 30 distance education tutors, four coordinators and four librarians were purposively selected to participate in the study. The findings showed that academic tasks of distance learners did not require them to use digital library resources, which resulted in low or no academic use of digital libraries. The findings also pointed to a high preference for print resources among distance learners which resulted in the low use of digital library resources. Finally, it was noted that even though most of the distance learners possessed basic ICT skills, this did not result in their of use of digital library resources. To improve digital library use in distance education, it is recommended that academic librarians seek and foster collaboration in teaching information literacy and library instruction in distance education, an approach which must be backed by a policy that mandates the use of (digital) library scholarly resources in teaching and learning in distance education. It is also recommended that the Centre for Distance Education and the University Library collaborate to offer training programmes in specific digital resources and general information literacy courses for all distance education stakeholders in the university to boost digital library use.
Attitudes and Behaviors Related to Individual and Classroom Practices: An Empirical Study of External and Internal Factors of ICT Use
Authors: Nagy Judit , Habók Anita 
Published: June 2018

Abstract
Our study aims to reveal the ICT use and related perceptions of university students through a self-developed online questionnaire. The research questions focus on (1) ICT attitudes, (2) frequency of ICT tool usage in a broad context and (3) frequency of ICT tool usage in the context of language learning. There seems to be agreement among both language and non-language majors concerning the motivating role and personal significance of ICT. Strong evidence is provided for the significant motivational role of ICT tools, while overall results confirm the substantial role of ICT use in learning, learner engagement and efficacy. Furthermore, ICT tool usage is more prominent among language majors in the areas of language, social and media tools, as well as blogs and vlogs. Generally, online dictionaries and lexicons are evaluated as most frequently used.
Collecting and processing samples in remote and dangerous places: the Environmental Sample Processor as a case study
Authors: Birch James 
Published: June 2018

Abstract
Collecting water samples in remote or dangerous places can help identify chemical spills, discover clandestine weapons production, or determine if there has been natural or human-caused biological contamination of waterways. These collections can be expensive or put humans at risk due to the nature of the locale or the detection target. Such sample collection challenges are similar to those faced in oceanography, where accessibility and the physical realities of remoteness, corrosiveness, and pressure, place severe requirements on instrumentation, especially for unattended operations over long periods of time. The Monterey Bay Aquarium Research Institute (MBARI) has been at the forefront of developments that push forward sample collection and processing capabilities in the ocean. Specifically, the development of the environmental sample processor (ESP), a microbiology laboratory-in-a-can, has allowed extended presence with high frequency sampling. When deployed, the ESP filters water to collect particles, then either preserves those particles, or creates a homogenate for molecular analysis. Originally designed for detecting harmful algae blooms and the toxins they produce, the ESP now has expanded analytical capabilities. A newer version of the ESP is now being tested on an autonomous underwater vehicle, providing never-before-seen mobility and unprecedented access to the top 300 m of the ocean.
Fleeting Film: Using Story to Seek Archival Permanence in the Transitory and Globalized Digital Visual Effects Industry
Authors: Samaras Evanthia , Johnston Andrew 
Published: June 2018

AbstractArchiving is a long-standing vocation, founded on principles such as provenance, original order, truth, evidence, preservation and permanence. A far cry from the visual spectacle and movable feast of film visual effects (VFX)—a transitory and globalized industry of disposable firms, ever-advancing technologies and a roving workforce which craft digital animations and seamless effects for the big screen. In this paper we utilize the concept of “story” as a premise to bring together the seemingly different vocations of archival science and film VFX. Through an exploration of digital film production and archival practice under the context of storytelling, we aim to highlight the need for archivists to work with the VFX industry to ensure evidence of this culturally significant aspect of filmmaking and cinema discourse is preserved into the future. As well present the argument that archives are more than collections of historical evidence. Archives are story—and archivists are storytellers.
Synthesis of functionalized pyrazole derivatives by regioselective [3+2] cycloadditions ofN-Boc-α-amino acid-derived ynones
Authors: Kirar Eva Pušavec , Grošelj Uroš , Golobič Amalija , Požgan Franc , Ričko Sebastijan , Štefane Bogdan , Svete Jurij 
Published: June 2018

Abstract[3+2] cycloadditions of ynones derived from glycine and (S)-alanine and some other dipolarophiles with azomethine imines, nitrile oxides, diazoacetate, and azidoacetate were studied. The dipolarophiles were obtained fromα-amino acids, either by the reduction of the carboxy function with ethynylmagnesium bromide or by propiolation of the amino function. Cu-catalyzed cycloadditions of ynones to azomethine imines were regioselective and gave the expected cycloadducts as inseparable mixtures of diastereomers. In some instances, further oxidative hydrolytic ring-opening took place to afford 3,3-dimethyl-3-(1H-pyrazol-1-yl)propanoic acids. Acid-catalyzed cycloadditions of 3-butenone were also regioselective and provided mixtures of diastereomeric cycloadducts, which were separated by chromatography. In the reactions of title ynones with alkyl diazoacetates,in situ-formed benzonitrile oxides, andtert-butyl azidoacetate, all cycloadducts were obtained as single regioisomers. The structures of all novel compounds were established by nuclear magnetic resonance and X-ray diffraction.
FALKO-R: Entwicklung eines Messinstruments zum fachbezogenen Professionswissen von Religionslehrkräften
Authors: Fricke Michael 
Published: June 2018

Zusammenfassung:
FALKO-R ist ein neu konzipierter Papier- und Bleistift-Test, der Fachwissen und fachdidaktisches Wissen von Religionslehrkräften misst. Er bildet Teil einer interdisziplinären, konzeptionell an die COACTIV-Studie angelehnten Studie zur Messung von Fachspezifischen Lehrerkompetenzen (FALKO) mit den Fächern Deutsch, Englisch, Latein, Musik, Evangelische Religionslehre und Pädagogik. An der Gesamtstudie beteiligten sich 1.594 Personen, an FALKO-R 159, davon 89 Religionslehrkräfte der Sekundarstufe und 70 Studierende auf Lehramt Religion. Der Beitrag berichtet über die Entwicklung des Tests, stellt erste Ergebnisse vor und diskutiert sie. Alle Items von FALKO-R sind abrufbar unter www.waxmann.com/buch3445.
Freeze-Thaw Durability of Concrete with Natural and Recycled Concrete Aggregates Using Air-Entraining Admixture
Authors: Kolay Prabir K. , Sulaiman Salamn O. , Kumar Sanjeev 
Published: June 2018

Abstract
Freezing and thawing cycles are one of the most damaging factors that affect the durability of concrete. The damages caused by cyclic freeze-thaw (F-T) action can be divided into two factors. The first factor is an increase in internal cracking, which causes the loss in relative dynamic modulus (RDM) of the concrete, and the second factor is surface scaling, which leads to weight loss of the concrete. In this study, the durability of concrete made by replacing natural coarse aggregates (NCA) with various percentages of recycled concrete aggregates (RCA) is measured for an F-T test. Also, some tests have been conducted with the addition of air-entraining admixture (AEA). Prior to mixing the concrete, both NCA and RCA were characterized to determine their suitability as a construction material. Concrete mixes consisting of 0, 20, 40, 60, 80, and 100 % replacement (by weight) of NCA with RCA were prepared. The same concrete mixes were prepared again with the addition of AEA. All specimens were tested for compressive strength after a curing period of 7, 14, and 28 days. The compressive strength of the concrete made with different percentages of RCA decreases as the percentage of RCA increases. After 28 days of curing, sample with 0, 40, and 100 % replacement of NCA with RCA were placed without AEA in the F-T chamber, along with 0, 20, 40, 60, 80, and 100 % NCA replacements containing AEA. After several cycles of freezing and thawing, the RDM, change in weight, and change in length were measured. The RDM loss and weight loss were noticed, as the cyclic F-T durability increased. It has also been observed that concrete mixes containing AEA were still durable after 300 cycles of freezing and thawing; however, the specimens without AEA failed before 150 cycles.
Óxido nítrico e exercício físico: potencialidades para a pesquisa em saúde – Artigo de Revisão
Authors: Agrícola Nestor Pérsio Alvim , Guillo Lídia Andreu , Silva Regisnei Aparecido De Oliveira 
Published: June 2018

Este texto é uma revisão sobre os estudos que relacionam o óxido nítrico e o exercício físico. As bases de dados consultadas foram Pubmed, Scielo e Medline. O objetivo é expor os resultados de estudos envolvendo o óxido nítrico (NO), o exercício físico e sua relação com a saúde humana. O NO é um radical livre que está envolvido em uma gama de reações no organismo humano e tem a capacidade tanto de ser benéfico, quanto potencialmente tóxico. Atua de forma direta na vasodilatação e possui a propriedade de inibição da agregação plaquetária. Os mecanismos protetores induzidos pelo exercício estão ligados a um aumento da sínteseendotelial de NO. A associação entre o NO sanguíneo e o salivar é o novo desafio dos pesquisadores dedicados ao estudo desde composto e sua ação no organismo.
OS DESAFIOS ENFRENTADOS POR MICROEMPRESAS DO VAREJO PARA A IMPORTAÇÃO DE BENS DE CONSUMO DA CHINA
Authors: Fraga Ricardo Klazer , Sander Andrea 
Published: June 2018

Tendo como premissas básicas o crescimento do número de microempresase o crescimento da participação dessas microempresas no cenárioeconômico nacional atual, o presente trabalho buscou identificaros desafios que são enfrentados por microempresas do varejo para aimportação de bens de consumo da China. O referencial teórico quedeu embasamento ao trabalho apoiou-se em autores consagrados,abordando temas como comércio internacional, aspectos culturaisde Brasil e China, além de uma abordagem sobre os procedimentosaduaneiros adotados pelo governo Brasileiro e um panorama sobre acarga tributária incidente sobre as importações de bens de consumo. Apesquisa teve caráter descritivo, com abordagem qualitativa, sendo olevantamento de campo o procedimento utilizado na coleta de dadose entrevistas realizadas com gestores de microempresas que importambens de consumo da China. Para tal coleta, foi elaborado um roteirosemiestruturado com perguntas abertas que permitiu que os entrevistados,três microempresários sediados nas cidades de Canoas (RS);Curitiba (PR); e em Maracajú (MS) expusessem seu ponto de vistaacerca do tema pesquisado, sendo estas respostas passaram por análiseinterpretativa. Os resultados obtidos foram que os microempresáriosnão percebem a diferença cultural e linguística como um problema aser enfrentado na negociação com fornecedores chineses. Verificou-seque a carga tributária incidente nos processos de importação de bens deconsumo é responsável por mais da metade do valor final das mercado rias e que existe certa dificuldade para os microempresários brasileirosconseguirem o seu registro para poderem operar no comércio exterior.
REFLEXOS DA IMPLANTAÇÃO DO CATAMARÃ NA CIDADE DE GUAÍBA - RS
Authors: Nunes Maria Cristina Pedroso , Sander Andrea 
Published: June 2018

Este artigo teve como objetivo principal verificar os reflexos econômicose sociais que a implantação da linha de transporte hidroviáriaalternativa da embarcação Catamarã trouxe para a cidade de Guaíba.Como objetivos específicos se estabeleceu caracterizar a mobilidadeurbana na cidade de Guaíba antes do funcionamento da embarcaçãoCatamarã, através de indicadores; identificar os reflexos econômicose sociais para o comércio da cidade de Guaíba; identificar os reflexoseconômicos e sociais para os usuários do Catamarã da cidade deGuaíba; verificar a contribuição do Catamarã para a mobilidade dacidade de Guaíba, na visão de um gestor, de comerciantes da cidadede Guaíba e de usuários do Catamarã. O trabalho contou com umarevisão da literatura que constituiu o referencial teórico, abordandoconceitos relacionados à sustentabilidade, à sustentabilidade urbana,responsabilidade social, e indicadores de sustentabilidade sociais e econômicos.A pesquisa realizada foi de cunho quantitativo e qualitativo,dirigida a um gestor, de dez comerciantes da cidade de Guaíba e deuma amostra de 52 usuários do Catamarã, colhidas em uma tarde, emum dia útil. Os resultados obtidos desta pesquisa mostraram que osusuários não estavam satisfeitos com o transporte público rodoviárioda cidade antes do Catamarã, se dizem satisfeitos com a implantaçãodo Catamarã, para a mobilidade da cidade, na melhora da qualidade devida, na economia local e para a sustentabilidade ambiental da região,mas estão descontentes quanto à tarifa e os horários disponíveis dessetransporte. Os comerciantes viram melhora econômica no comerciogeral e em seus negócios, na mobilidade e para a população da cidade,mas acham que falta incentivos do poder público. A gestora pública acredita que a cidade e a população obtiveram ganhos espetacularesem todos os sentidos já mencionados pelos outros participantes e aindapara a cultura e a autoestima da cidade.
RESPONSABILIDADE SOCIAL EMPRESARIAL EM UMA INSTITUIÇÃO DE ENSINO SUPERIOR PARTICULAR: INSERÇÃO DA POPULAÇÃO IDOSA ATRAVÉS DA EXTENSÃO
Authors: Ribeiro Isadora Ciarini , Sander Andrea 
Published: June 2018

A presente pesquisa foi realizada em uma Instituição de Ensino SuperiorParticular da cidade de Porto Alegre, com objetivo principal deverificar os desafios para a responsabilidade social empresarial em umainstituição de ensino superior particular a partir da inserção da populaçãoidosa através da extensão. Os objetivos específicos da pesquisaforam identificar como estão inseridas as questões de responsabilidadesocial empresarial na gestão da IES pesquisada;verificar a contribuiçãodo programa para alcançar os objetivos da IES pesquisada, bemcomo para o desenvolvimento da população atendida pelo programa;e identificar os impactos da Universidade Adulto Maior (UAM) naqualidade de vida dos participantes. A pesquisa realizada foi de cunhoquantitativo e qualitativo, respectivamente dirigida a dez discentes doPrograma Universidade Adulto Maior do IPA e a Coordenadora domesmo Programa, com apoio documental e observacional. A partir dosdados coletados observou-se que o Programa Universidade AdultoMaior possui significativa influência do movimento metodista, quepermeia toda a gestão da IES pesquisada. Também se percebeu que osprogramas de responsabilidade social da IES são custeados pelo IPA,o que configura a responsabilidade social empresarial da instituição.Quanto a contribuição do programa para alcançar os objetivos da IESpesquisada, bem como para o desenvolvimento da população atendidapelo programa, se observou que a UAM contribui com os objetivosdo Centro Universitário Metodista IPA, que são o fomentar a ciênciae o conhecimento. Com relação aos ganhos dos alunos da UAM, foram destacados aumento da qualidade de vida; ganhos na partecognitiva; mudança de perspectiva de vida; aquisição de informação;aumento da autoestima; e ter voz e ser ouvido no grupo, além docontato com novas tecnologias, que diminuem a distância entre essafaixa da população e as demais gerações.Constatou-se dos impactosda Universidade Adulto Maior (UAM) na qualidade de vida dos participantesas atividades que resultam em um sentimento de inclusão,de aprimoramento e desenvolvimento de habilidades, que contribuemcom a saúde, com a prevenção de doenças e na qualidade de vida e naautonomia com as atividades cotidianas. Finalmente as pesquisadassão unânimes com relação ao bem estar no ambiente universitário. Noque diz respeito ao objetivo principal da pesquisa, conclui-se que aInstituição pesquisada atende as questões de responsabilidade social,através do Programa de Extensão Universidade Adulto Maior, sendoprecursora dessa modalidade de responsabilidade social empresarialentre as instituições de ensino superior particulares. O Programa UAMatende aos objetivos da instituição e ao desenvolvimento da populaçãoatendida por ele. Os discentes pesquisados atestaram a importânciado Programa na contribuição para a qualidade de vida.