bluuebunny/crossref_metadata_2025 huggingface dataset:
L’effet de la performance logistique en magasin de détail sur la satisfaction et le bonheur des consommateurs
Authors: Ltifi Moez , Hikkerova Lubica , Gharbi Jamel-Eddine
Published: October 2016

Dans le commerce de détail, les gestionnaires ont tendance à limiter leurs stratégies commercialesau prix, au produit et à la promotion. Par conséquent, les performances logistiques en magasin sont rarement appréhendéesen termes de création de valeur pour les consommateurs. Or, ces performances déterminent en grande partie comment le client peut atteindre ses objectifs de façon efficace, pratique, satisfaisante et « agréable ». L’objectif de cette recherche est donc précisément d’étudier le rôle de la logistique en magasin de détail pour analyser l’impact de sa performance sur la satisfaction, et le bonheur du consommateur, ce dernier étant appréhendé comme un antécédent cognitif de la satisfaction et des attitudes du client. Notre modèle structurel, testé sur un échantillon de 270 consommateurs tunisiens, révèle que les performances logistiques en magasin de détail influencent positivement et significativement la satisfaction des consommateurs, et que le bonheur est un médiateur partiel entre la perception des performances logistiques en magasin et la satisfaction du consommateur.
L’ITMO Santé publique entre savoirs et pouvoirs
Authors: Benamouzig Daniel , Chêne Geneviève
Published: October 2016

L’Institut thématique multi-organismes (ITMO) Santé publique exerce un pouvoir discret et une influence méconnue dans le monde de la santé. Au sein de l’Alliance de recherche pour les sciences de la vie et de la santé (Aviesan), il identifie des priorités et anime des communautés de recherche en santé publique. Il est plus généralement impliqué dans les problématiques de santé publique pour lesquelles l’apport de recherches scientifiques apparaît pertinent. Ces problématiques étant nombreuses, la place de l’institut se renforce au fil des ans, depuis sa création, en 2009.
Politique de l'histoire : cultures juridiques et subjectivités subalternes du mouvement LGBTQI en Espagne
Authors: Chamouleau Brice
Published: October 2016

L’article s’intéresse à l’interprétation de l’émancipation LGBTQI dans l’Espagne postfranquiste, fondée sur la théorie des nouveaux mouvements sociaux. Elle construit un sujet d’histoire rationnel et intéressé projeté dans les catégories citoyennes et juridiques produites par l’État du consensus réformiste. Pour en dévoiler la dimension excluante et disciplinaire, ce sujet d’histoire du nouveau mouvement homosexuel est confronté à d’autres subjectivités radicales et juvéniles devenues subalternes dans l’histoire démocratique nationale. La théorie des nouveaux mouvements sociaux est alors confrontée à d’autres apports théoriques, post-coloniaux, qui l’extraient de l’évidence du cadre national dont elle dépend étroitement pour concevoir les subjectivités citoyennes passées.
Topografías variables del poder: las relaciones entre movimientos sociales y el Estado argentino en dos tiempos
Authors: Manzano Virginia
Published: October 2016

Durant les années 1990, l’Amérique Latine a été un terrain privilégié non seulement pour le néolibéralisme mais également pour la contestation sociale qui a remis en questions l’austérité et les ajustements structurels. L’ampleur de la mobilisation a été telle, qu’elle est parvenue, dans certains cas, à reconfigurer la structure et le mode de fonctionnement de certains gouvernements. En Equateur et en Bolivie par exemple, les mouvements sociaux ont contribué à refonder les bases de l’Etat moderne libéral, en appuyant des réformes fondées sur les notions de pluri-nationalité et de vivre bien / bien vivre (« vivir bien » / « buen vivir »). Cette évolution qui s’est produite à échelle continentale est au cœur de cet article. Celui-ci étudie le caractère relationnel de l’Etat ainsi que les mouvements sociaux en Argentine, tout en analysant, sur le plan historique, comment se succèdent différentes formes de gouvernement néolibéral alors que se met en place un contexte favorable à l’application de politiques populaires de redistribution des revenus. Cette étude propose, en particulier, une analyse ethnographique sur la façon dont se sont formés le mouvement des sans-emplois (« piquetero ») dans le district de La Matanza – province de Buenos-Aires – et l’organisation Túpac Amaru dans la province de Jujuy, afin de mettre en évidence les topographies variables du pouvoir.
De la robustesse du gouvernement représentatif face à la contestation. Réflexions à partir du cas argentin
Authors: Mariani Américo
Published: October 2016

Le gouvernement représentatif est toujours présenté comme souffrant de multiples carences, fragile et, pour ainsi dire, au bord du gouffre. Il s’agira, dans cet article, à partir de l’analyse des conséquences des mouvements sociaux du 2001 en Argentine, de penser la robustesse du gouvernement représentatif. En ingénierie, un système est jugé robuste lorsqu’il reste performant malgré de fortes perturbations. Les institutions représentatives sont comprises ici comme visant avant tout la gouvernementalité et comme distinctes de la démocratie, approche qui permet de renouveler le regard sur la question de la « crise de la représentation ».
Guerres et jeux vidéo : représentations et enjeux de mémoire de la Seconde Guerre mondiale
Authors: Facchini Thomas
Published: October 2016

L’Histoire, et particulièrement la Seconde Guerre mondiale, est propice à de nombreuses mises en scène vidéoludiques. Cet article se décompose en deux grands axes. Le premier porte sur l’évolution des représentations vidéoludiques de la Seconde Guerre mondiale au cours des années 2000 et les diverses esthétiques (temporelles, visuelles et sonores) du combat qui transparaissent dans ces jeux. Le second axe questionne la polémique suscitée en Russie par le jeu vidéo Company of Heroes 2, sorti en 2013 dont l’action se déroule sur le front Est. Il est accusé de donner une mauvaise image de l’Armée Rouge et de se concentrer sur les crimes soviétiques. Cette polémique est analysée à la lumière du contexte politique et mémoriel de la Russie où la Seconde Guerre mondiale, appelée « Grande guerre patriotique », est instrumentalisée au profit d’une construction identitaire nationale.
Repolitizando el « desarrollo ». Las ONGD y la acción colectiva en España
Authors: Roca Beltrán
Published: October 2016

Plusieurs voix à l'intérieur des Organisations non gouvernementales de développement (ONGD) défendent l’idée d’une « repolitisation du développement », autrement dit, d’un retour à l'esprit des mouvements sociaux qui sont à l'origine de ces ONGD, afin de mettre en œuvre des actions collectives. Cet article étudie les relations complexes et contradictoires entre les ONGD et les pouvoirs politique et patronal en s'appuyant sur une analyse générale du secteur des ONGD espagnoles ainsi que sur deux études de cas des campagnes des ONGD : le conflit du Conseil de Coopération en 2001 et la « Bataille de Glivec » qui dure depuis 2006. L’analyse montre que l'interaction entre ONGD et administrations se caractérise par la prééminence de la négociation sur le conflit, un faible recours à l'action collective, une grande composante médiatique dans l'activité de contestation et une grande dépendance économique. En outre, parmi les ONGD espagnoles prédomine la subsidiarité face à l'action collective. Le discours sur la « repolitisation » ne coïncide pas avec les pratiques réelles de la plupart de ces ONGD.
A espacialização dos vazios urbanos em Londrina (PR)
Authors: Nascimento Agnaldo da Silva
Published: October 2016

A produção do espaço urbano, nos últimos anos é subordinada à lógica de reprodução do capital imobiliário, principalmente pela valorização da propriedade fundiária. Na produção das cidades os agentes envolvidos (re)produzem uma morfologia urbana, no qual soma-se aspectos da forma física com aspectos de seus conteúdos e processos. Dentro da área delimitada pelo perímetro urbano estão contidos vários elementos que compõem o tecido urbano, como por exemplo, os vazios urbanos que se apresentam com presença significativa nas cidades. Nesse sentido, o texto realizou uma discussão com ênfase nos vazios urbanos, problematizando a sua presença na cidade média de Londrina (PR). Considerou-se, primeiramente, que a existência, a manutenção e a multiplicação destes elementos urbanos inscritos na paisagem tem sido um indicativo da produção das cidades em função da reprodução do capital, evidenciado pela presença relevante do processo de especulação imobiliária. Esse processo tem se dado em detrimento de uma cidade menos desigual, acentuando o processo de segregação urbana e, consequentemente, a desigualdade social. Desse modo, a discussão enfocou a expansão do tecido urbano de Londrina buscando a origem, a constituição e a permanência dos vazios urbanos. Baseou-se, para tal objetivo, no histórico de expansão da cidade e nas formas através das quais os vazios urbanos se inscrevem espacialmente e em dados quantitativos elaborados a partir de imagem de satélite, por intermédio de técnicas de sensoriamento remoto e geoprocessamento no qual foi realizado a coleta e o tratamento das informações espaciais. O resultado da metodologia gerou produtos cartográficos que permitem analisar o processo de expansão urbana de Londrina e a espacialização dos vazios urbanos, bem como, identificar que a cidade possui em torno de 50% de sua área urbana com a presença dos vazios urbanos.
A política de coesão territorial da União Europeia: tendências recentes em cenário de crise e desemprego
Authors: Rückert Aldomar A. , Albanus Adriana Pilar F.
Published: October 2016

O artigo apresenta resultados preliminares de pesquisa exploratória sobre a Política de Coesão Territorial da União Europeia associada a repercussões territoriais recentes examinando-se a crise financeira e o desemprego. Analisa-se a Política e os gastos dos Fundos Estruturais e de Coesão entre 2001 e 2013 dando-se destaque para o problema do desemprego, principalmente, nos países PIIGS e em algumas de suas regiões com fragilidades socioeconômicas e socioculturais. Mapas temáticos representam variáveis como o comportamento do PIB per capita, da dívida pública dos Estados Membros e de taxas de desemprego em escalas regionais e nacionais no território da União Europeia.
La valeur des pauvres. Le pari sur l’argent comme médiateur du conflit social contemporain
Authors: Feltran Gabriel de Santis
Published: October 2016

No Brasil, as periferias são o centro de duas figurações recentes e dicotômicas: a da violência urbana que pede mais repressão e a do desenvolvimento social, que transformaria pobres em “Classe C”. Este ensaio argumenta que a representação da “violência urbana” retirou o centro da “questão social” contemporânea dos “trabalhadores”, deslocando-o aos “marginais”. A derrocada do universalismo inscrito nesse deslocamento enseja um governo seletivo que recorta a população em distintos graus de “vulnerabilidade” e níveis de “complexidade” da intervenção estatal; como efeito colateral, emergem distintos regimes normativos nas periferias – por exemplo: estatal, do “crime” e religioso – que embora estejam sempre em tensão, encontram coesão no fato de regularem mercados monetarizados. O dinheiro passa a mediar a relação entre os grupos recortados e suas formas de vida que, sob outras perspectivas – a lei ou a moral – estariam em alteridade radical; o consumo emerge como forma de vida comum e a expansão mercantil, aposta de todos, conecta mercados legais e ilegais, inclusive fomentando a violência urbana que pretensamente controlaria. Os argumentos têm por base pesquisa de campo e debates com diferentes grupos de pesquisa, entre São Paulo e Rio de Janeiro.
Autoethnography as a Methodological Approach in Adult Vocational Education and Technology
Authors: Grenier Robin S.
Published: October 2016

Autoethnography is a form of qualitative inquiry intended to connect the lived experience of a researcher to the larger social and cultural world (Ellis, 2004) and it can be a valuable methodological tool for adult educators and learners. This paper explores the use and value of autoethnography as a qualitative methodology and explores the possibilities of its application to future research in the field of adult vocational and technology education. In particular, the question of what autoethnography is, and how it can be applied to adult learning contexts, is addressed. This is achieved by delving into the defining characteristics of autoethnography, the variations of the approach and its representation in scholarly work, and ends with current critiques that those considering autoethnography must consider.
QoS-Aware Service Selection and Multicast Framework for Wireless Mesh Networks
Authors: Rao A. Narayana , Rao Ch. D. V. Subba
Published: October 2016

Wireless Mesh Network (WMN) is a multi-hop, multi-path network that has become the most favored method in delivering end-to-end data, voice and video. Data transmission through WMN has the security and reliability, same as the conventional wired networks. Since, WMN has a decentralized topology, maintaining QoS is very crucial. Hence in this work, we propose to develop a WMN that selects services based on high QoS. In order to avoid redundancy in data transmission, in this work we propose to develop an efficient framework for multicasting by determining the most effective path for transmitting the same data towards multiple destination nodes. By simulation results, we show that the proposed technique provides better QoS in terms of throughput and packet delivery ratio.
The Impact of Territorial and Relational Belonging on Member Retention in Social Networking Sites
Authors: Johnson Vess , Ryan Sherry , Kiser Angelina I. T.
Published: October 2016

With the growth in social networking and the highly competitive nature of the social networking market, it is important to understand the factors that influence social network site (SNS) member retention. In order to better understand continuation intention among SNS members, the authors propose and empirically test a model built upon the IS continuance model, motivation theory, and two belongingness constructs drawn from social psychology. Results of this study indicate that positive confirmation, perceived usefulness, and perceived enjoyment influence user satisfaction, which in turn has a strong impact on continuance intention. In addition, the member's sense of territorial belonging to the SNS has a positive influence on both continuance intention and perceived enjoyment. The member's sense of belonging stemming from relationships with others within the community has a positive influence on both perceived usefulness and perceived enjoyment, but appears to be insignificant with respect to a direct influence on continuance intention.
Socio-Technical Determinants of Information Security Perceptions in US Local Governments
Authors: Shin Eunjung , Welch Eric W.
Published: October 2016

Concerns about electronic information security in government have increased alongside increased use of online media. However, to date, few studies have examined the social mechanisms influencing electronic information security. This article applies a socio-technical framework to model how technical, organizational and environmental complexities limit electronic information security perceived by local government managers. Furthermore, it examines to what extent organizational design buffers security risks. Using data from a 2010 national survey of local government managers, this article empirically tests the proposed model in the context of U.S. local government's online media use. Findings show that, in addition to technical complexity, organizational and environmental complexities are negatively associated with local managers' awareness of and confidence in electronic information security. On the other hand, internal security policy and decentralized decision-making appear to buffer security risks and enhance perceived information security.
An Efficient and Lossless Cryptosystem for Security in Tele-Ophthalmology Applications Using Chaotic Theory
Authors: Mehta Garima , Dutta Malay Kishore , Kim Pyung Soo
Published: October 2016

Tele-ophthalmology has gained a lot of popularity as it involves retinal fundus images which can be analyzed for identification of severe diseases like diabetic retinopathy and glaucoma. With this increasing popularity, requirement for medical data confidentiality and privacy has also increased during transmission or storage. To meet this challenge, this paper propose an efficient and lossless cryptosystem based upon chaotic theory for encryption of medical fundus images. In the proposed encryption scheme a strategic combination of scrambling and substitution architecture is proposed which complements each other. The proposed scheme of encryption for fundus images is challenging as these images are 3-D color image and cannot be compressed as compression may not be able to retain all relevant medical information. For performance analysis, the proposed algorithm has been evaluated for perceptual and cryptographic security. The experimental results indicate that the proposed method is lossless and resistant against attacks making the proposed scheme suitable for real time applications.
Collaborative Environment for Remote Clinical Reasoning Learning
Authors: Ferradji Mohamed Abderraouf , Zidani Abdelmadjid
Published: October 2016

Despite the significant advances achieved these recent last years in terms of technologies widespread use in medical education, clinical reasoning learning (CRL) remains an extremely hard task in which there are still many gray areas that should be enlightened to better understand it. Furthermore, while CRL is basically a collaborative task implying the participation of many students and tutors working simultaneously on a same case, it should be considered from a social perspective. The authors followed then a collaborative-based learning approach, which consists in designing a shared workspace to support collaboration and enable social clinical knowledge acquisition. They started with a deep analysis of the CRL process in order to understand the usual way under which students learn together and then, highlight the vital collaborative learning tasks that need to be supported. The resulting designed model allowed us to shift towards Collaborative CRL (CCRL).
Hybrid Fuzzy Neural Search Retrieval System
Authors: Ghnemat Rawan , Shaout Adnan
Published: October 2016

Search engines are crucial for information gathering systems (IGS). New challenges face search engines concerning automatic learning from user requests. In this paper, a new hybrid intelligent system is proposed to enhance the search process. Based on a Multilayer Fuzzy Inference System (MFIS), the first step is to implement a scalable system to relay logical rules in order to produce three classifications for search behavior, user profiles, and query characteristics from analysis of navigation log files. These three outputs from the MFIS are used as inputs for the second step, an Adaptive Neuro-Fuzzy Inference System (ANFIS). The training process of the ANFIS replaced the rules by adjusting the weights in order to find the most relevant result for the search query. This proposed system, called MFIS-ANFIS, is implemented as an experimental system. The system performance is evaluated using quantitative and comparative analysis. MFIS-ANFIS aimed to be the core of intelligent and reliable search process.
An Integrated Model of Customer Experience, Perceived Value, Satisfaction, and Loyalty in Electronic Stores
Authors: Khodadadi Pouyan , Abdi Farshid , Khalili-Damghani Kaveh
Published: October 2016

The main problem of electronic-stores is to resolve the obstacles of visitors as potential customers. In this paper the relationship between the experience of online customers, perceived value, satisfaction, and the loyalty is investigated. The main hypotheses of this study are analyzed using Structural Equation Modelling (SEM) methodology. The study is conducted in the biggest electronic-store in Iran. The structural model, is developed on the basis of four main hypotheses as follows: H1) Customer purchasing experience has impact on perceived value; H2) Perceived value of customers has impact on satisfaction; H3) Customer satisfaction has an impact on loyalty; H4) Customer purchasing experience has an impact on loyalty. The reliability of questions is checked using opinion of a group of experts who have at least 15 years of related experiences. The hypotheses are tested using data extracted from 396 questionnaires through AMOS software. Results show that customer's experience is influenced by trust, interaction, perceived usefulness, action, information credibility, and relating. Also, the customers' experience in online purchases does not directly influence their loyalty, since experience is a mental concept which has to pass the sequence of “Experience-Perceived Value-Satisfaction-Loyalty” in order to be converted to a behavioral concept.
Parametric Dimension Synthesis and Optimizations of Planar 5R Parallel Robots
Authors: Huang Ming Z.
Published: October 2016

The dimension synthesis problem for parallel robots in general is much more complex than their serial counterparts, due to the strong dependence of geometric parameters and their performances. In dimension synthesis for robots, typical performance characteristics that may be considered to evaluate the fitness of a design include workspace, manipulability, velocity, stiffness, and payload. A case study on optimal design for both workspace and manipulability had been presented previously for a class of planar parallel robots with 5R joints. This paper extends the design optimization study to include stiffness, velocity, and payload characteristics for the same class of 2-dof robots. A simple and effective parameter-variation-based, constrained optimization method will be demonstrated to obtain various optimal design solutions corresponding to those characteristics respectively. The optimal design solutions, obtained in scalable dimensionless forms, are global in nature and relative to a workspace constraint.
Autonomous Systems in a Military Context (Part 2)
Authors: Galliott Jai , McFarland Tim
Published: October 2016

This is the second paper of two on the role of autonomy in the unmanned systems revolution currently underway and affecting military forces around the globe. In the last paper, the authors considered the implications of autonomy on the legal obligations of military forces and their ability to meet these obligations, primarily through a survey of the domestic law of a number of drone wielding nations and relevant international legal regimes, including the law of armed conflict, arms control law, international human rights law, and others. However, the impact of autonomy in the military context extends well beyond the law and also encompasses philosophy and morality. Therefore, this paper addresses perennial problems concerning autonomous systems and their impact on what justifies the initial resort to war, who may be legitimately targeted in warfare, the collateral effects of military weaponry and the methods of determining and dealing with violations of the laws of just war theory.
Design and Implementation of Distributed Autonomous Coordinators for Cooperative Multi-Robot Systems
Authors: Yasuda Gen'ichi
Published: October 2016

The paper presents a systematic method of the design of cooperative task planning and execution for complex robotic systems using multiple robots. Because individual robots can autonomously execute their dedicated tasks, in cooperative multi-robot systems, robotic activities should be designed as discrete event driven asynchronous, concurrent processes. Further, since robotic activities are hierarchically defined, control requirements should be specified in a proper and consistent manner on different levels of control abstraction. In this paper, Petri nets are adopted as a specification tool for task planning and execution by multiple robots. Based on place/transition Petri nets, control conditions for inter-robot cooperation with synchronized interaction are represented, and control rules to achieve distributed autonomous coordinated activities with synchronous and asynchronous communication are proposed. An implementation of net based control software on hierarchical and distributed architecture is presented for an example multi-robot cell, where the higher-level controller executes a global net model of task plan representing cooperative behaviors performed by the robots, and the parallel activities of the individual robots are synchronized through the transmission of requests and the reception of status between the associated lower-level local controllers.
DCT Image Steganography Analysis for Privacy Preserving Data Mining
Authors: Ismail Sahar A. El-Rahman , Al Makhdhub Dalal , Al Qahtani Amal A. , Al Shabanat Ghadah A. , Omair Nouf M. , Alomerini Rawan S.
Published: October 2016

We live in an information era where sensitive information extracted from data mining systems is vulnerable to exploitation. Privacy preserving data mining aims to prevent the discovery of sensitive information. Information hiding systems provide excellent privacy and confidentiality, where securing confidential communications in public channels can be achieved using steganography. A cover media are exploited using steganography techniques where they hide the payload's existence within appropriate multimedia carriers. This paper aims to study steganography techniques in spatial and frequency domains, and then analyzes the performance of Discrete Cosine Transform (DCT) based steganography using the low frequency and the middle frequency to compare their performance using Peak Signal to Noise Ratio (PSNR) and Mean Square Error (MSE). The experimental results show that middle frequency has the larger message capacity and best performance.
Social Network Service for Scientists Difficulties Facing E-Publishing over Cloud Computing
Authors: Abu-Taieh Evon M. O.
Published: October 2016

This paper illustrated the difficulties facing e-publishing over cloud computing pertaining to social network service for scientists from three axioms: the life cycle of the research document, an explanation of what a researcher juggles during the course of the production of the document related to research. Then this paper discussed discovering study of the researcher knowledge pertaining to both social network service for scientists, scholarly search engines and citation indices. The first axiom reflected the life cycle of the research paper and how each phase affects and influences the next phase. The second axiom showed the researcher worries and the different tasks that a scholar juggles: research financial support, institutional laws and regulations, time & money, legality and copy rights, language barrier, tech savvy, web metrics & university ranking. The third axiom was a discovering study that explored the weakness of the scholar pertaining to his/her knowledge about citation indices. Scholar's knowledge of social network service for scientists and citation indices like: ResearchGate, Google scholar, and academia.edu, Zotero, Coins, and figshare. CiteSeerX, getCITED, MyScienceWork, Mendeley; In addition, citation indices pertaining to Social network service for scientists and scholar search engines: i10-index, h- index, SCI, SSCI, and RG score.
Technological Diffusion of Near Field Communication (NFC)
Authors: Page Tom
Published: October 2016

Near Field Communication (NFC) is increasingly being employed in modern consumer devices and until now it has been used for mobile payments. However, on further investigation there are other areas where NFC has a key role. Recent developments in Medical and ticketing based NFC applications show promise for being the so called “Catalyst” for NFC's integration. The objective of this research was to determine if mobile payments will be the catalyst for a more widespread integration of NFC into society and how NFC technology will impact on everyday life. Research Methods comprised questionnaire and interviews to gain further insight into the current standing of NFC. The findings indicated that NFC will not mature enough to be classified as viral by 2016, especially with contactless payments as no decisions seem to have been made for any progression. It is that most likely outcome that NFC will mature enough at the very latest in 2018, with further development in the years to come for unique serialisation and the internet of things. Managerial implications for this research extend to the medical sector where large gains can be made in better patient care and remote diagnostics leading to a more efficient service.
Educação e risco social na curricularização do saber estatístico no Brasil
Authors: Bello Samuel Edmundo Lopez , Sperrhake Renata
Published: October 2016

O objetivo deste texto é discutir a curricularização do saber estatístico na Educação Básica. Por que certos temas que se desenvolvem em torno dos saberes estatísticos curriculares ganham destaque e recorrência? Por que se tem feito da estatística um objeto do currículo através de programas escolares, mobilizando-nos na busca de boas práticas de ensino e aprendizagem? Para pensarmos nessas questões, trabalhamos empiricamente com os Parâmetros Curriculares Nacionais do Ensino Médio e Fundamental e o Caderno de Formação de Professores número 7, do Pacto Nacional pela Alfabetização na Idade Certa. Para nossa análise, utilizamos o conceito de governamentalidade de M. Foucault e o de numeramentalidade criado a partir das ideias do mesmo autor. Nas análises mostra-se que, na curricularização dos saberes estatísticos, não entra em jogo apenas o ensino-aprendizagem de certos ‘conteúdos’; aprendem-se e ensinam-se, também, atitudes que constituem modos de ser sujeito expressas nas formas de se posicionar diante de determinadas situações e de se tomar decisões na contemporaneidade.
“O Jeca não é assim, ele está assim!”: apontamentos sobre a história das políticas de saúde no meio rural do Brasil
Authors: BARBOSA JÚNIOR Sebastião André , LIRA Paulo Victor Rodrigues de Azevedo , ALBUQUERQUE Pedro Costa Cavalcanti de , FREITAS Aderaldo Alexandrino de
Published: October 2016

A implantação e evolução das Políticas de Saúde no campo foi um processo muito difícil, estando associado principalmente aos interesses das elites rurais. Com isso, há necessidade de aprofundamento no tema, e este estudo realizou uma revisão bibliográfica sobre as políticas de saúde no meio rural brasileiro, desde o período colonial até os dias atuais, com a criação da Política Nacional de Saúde Integral dos Povos do Campo e da Floresta. Os primeiros séculos no Brasil demonstram um desinteresse do Poder Público para com as populações rurais. As primeiras políticas de saúde para o campo surgem apenas no início do século XX, evoluindo em sua maioria para a manutenção de trabalhadores(as) sadios(as), com a finalidade de assegurar uma maior produção. Mesmo com a criação do Sistema Único de Saúde a saúde dos povos do campo ainda continuava marginalizada. Esse processo vem mudando desde a criação do Grupo Terra e da Política Nacional de Saúde Integral das Populações do Campo e da Floresta, trazendo os excluídos para o centro da discussão e construção de uma pauta específica. Essa transformação aponta pela primeira vez para o protagonismo das populações do campo na construção e aplicação de uma Política de Saúde para o meio rural brasileiro.
Interferência do folículo dominante no início do tratamento superovulatório em vacas Nelore
Authors: Martinez Antonio Campanha , Pires Rita Maria Ladeira , Condessa Manoel Augusto Klempovus Villela , Alvarez Rafael Herrera
Published: October 2016

Diversos fatores podem alterar a resposta superovulatória, dentre eles a presença de um folículo dominante no início do tratamento superovulatório. O objetivo deste trabalho foi avaliar a influência da presença do folículo dominante, no início do tratamento superovulatório, na resposta de vacas submetidas a um processo hormonal de sincronização de onda de crescimento folicular. Vinte e uma vacas da raça Nelore foram sincronizadas e superovuladas por três vezes em intervalos de dois meses. Durante o período de superovulação os animais foram submetidos a exames ultrassonográficos diários. Todos os animais foram inseminados com sêmen de um mesmo reprodutor e a coleta foi realizada sete dias após a inseminação. Foram avaliadas quantidades totais de estruturas coletadas, número de embriões viáveis, número de estruturas degeneradas e não fecundadas. Não se observou diferença entre os parâmetros analisados quando comparados à presença ou não do folículo dominante no início do protocolo superovulatório.
Evaluation of Piezodiagnostics Approach for Leaks Detection in a Pipe Loop
Authors: Camacho-Navarro Jhonatan , Ruiz Magda , Villamizar Rodolfo , Mujica Luis , Pérez Oscar
Published: October 2016

Pipe leaks detection has a great economic, environmental and safety impact. Although several methods have been developed to solve the leak detection problem, some drawbacks such as continuous monitoring and robustness should be addressed yet. Thus, this paper presents the main results of using a leaks detection and classification methodology, which takes advantage of piezodiagnostics principle. It consists of: i) transmitting/sensing guided waves along the pipe surface by means of piezoelectric device ii) representing statistically the cross-correlated piezoelectric measurements by using Principal Component Analysis iii) identifying leaks by using error indexes computed from a statistical baseline model and iv) verifying the performance of the methodology by using a Self-Organizing Map as visualization tool and considering different leak scenario. In this sense, the methodology was experimentally evaluated in a carbon-steel pipe loop under different leaks scenarios, with several sizes and locations. In addition, the sensitivity of the methodology to temperature, humidity and pressure variations was experimentally validated. Therefore, the effectiveness of the methodology to detect and classify pipe leaks, under varying environmental and operational conditions, was demonstrated. As a result, the combination of piezodiagnostics approach, cross-correlation analysis, principal component analysis, and Self-Organizing Maps, become as promising solution in the field of structural health monitoring and specifically to achieve robust solution for pipe leak detection.
Using X-FEM for Progressive Damage Simulation of Laminated Composites Featuring Manufacturing Imperfections
Authors: Retschitzegger Lukas , Adumitroaie Adi , Hörrmann Susanne , Schagerl Martin
Published: October 2016

Over the last few decades research advances provided a couple of different modeling techniques for progressive damage simulation in composite materials. Among them, the eXtended Finite Element Method (XFEM) is a new, but powerful tool for progressive damage simulation. In this work common modeling techniques are reviewed, and then a particular focus is placed on XFEM. The standard implementation of XFEM in Abaqus is reviewed and assessed within an FE simulation of an FRP specimen including manufacturing imperfections. Good agreement is found between simulation results and experimental data. In order to consider the specific damage behavior of the fiber reinforced composite materials within the XFEM frame, an additional implementation of the user subroutine UDMGINI is used, and results are further improved.
Plane Asymptotic Interface Crack Solutions in Gradient Elasticity Theory
Authors: Kotoul Michal , Profant Tomáš , Padělek Petr
Published: October 2016

The goal of the contribution is to develop an asymptotic interface crack-tip solution under conditions of plane strain for a bi-material that obeys a special form of linear isotropic gradient elasticity. Several fracture mechanics problems have been solved in the past within the framework of strain gradient elasticity which is capable to capture additional length/size parameters. However to our best knowledge no solution concerning an interface crack is available in the literature.
Shear-Mode Viscoelastic Damage Formulation Interface Element
Authors: Goodarzi M. Saeed , Hosseini-Toudeshky Hossein , Jalalvand Meisam
Published: October 2016

In this paper, a viscoelastic-damage cohesive zone model is formulated and discussed. The interface element constitutive law has two elastic and damage regimes. Viscoelastic behaviour has been assumed for the shear stress in the elastic regime. Three element Voigt model has been used for the formulation of relaxation modulus of the material. Shear Stress has been evaluated in the elastic regime of the interface with integration over the history of the applied strain at the interface. Damage evolution proceeds according to the bilinear cohesive constitutive law up to the complete decohesion. Numerical examples for one element model has been presented to see the effect of parameters on cohesive constitutive law.
Creep Damage and Fracture in Advanced Tungsten Modified 9%Cr Ferritic Steel
Authors: Sklenička Václav , Kuchařová Květa , Kvapilová Marie , Král Petr , Dvořák Jiří
Published: October 2016

Advanced tungsten modified 9%Cr ferritic steel (ASTM Grade P92) is a promising material for the next generation of fossil and nuclear power plants. Unfortunately, there are rather few published reports on damage processes in P92 steel during high temperature creep and the effect of damage evolution on the creep strength is not fully understood. In this work, the creep behaviour of P92 steel in as-received condition and after long-term isothermal ageing was investigated at 600 and 650°C using uniaxial tension creep tests. To quantify the effect of each damage process on the loss of creep strength, most of creep tests were followed by microstructural and fractographic investigations. It was found that the large Laves phase particles, which coarsened during creep exposure, served as preferential sites for creep cavity nucleation.
Analytical Approximation of Crack-Tip Stress Field: Study on Efficient Determination of Coefficients of Higher Order Terms of Williams Power Expansion
Authors: Sobek Jakub , Frantík Petr , Veselý Václav
Published: October 2016

The paper presents a study on accuracy of the multi-parameter approximation of the stress field in a cracked body using Williams power series calibrated according to results of FEM computation. Main attention is paid to a detailed analysis of suitable selection of FE nodes, whose results serve as inputs to the over-deterministic method (ODM) employed for determination of the coefficients of terms of the Williams expansion describing the crack-tip field. Two different ways of FE nodal selection are compared – nodes selected from the crack tip vicinity versus nodes selected from a specific part of the test specimen body in a specific way. Comparison is made with the usage of the authors’ own developed procedures enabling both the determination of the coefficients of the analytical approximation of stress field based on the FE results and the backward reconstruction of the field from those determined terms’ coefficients/functions. The wedge-splitting test (WST) specimen with a crack is taken as example for the study.
Reliability-Based Optimization of the Stacking Sequence Layup in Post-Buckled Composite Stiffened Panels
Authors: López Carlos , Bacarreza Omar , Baldomir Aitor , Hernández Santiago , Aliabadi M.H.
Published: October 2016

This paper presents a methodology to carry out Reliability-Based Design Optimization (RBDO) in composite stiffened panels. The target is to maximize the reaction force that the panel can withstand before collapse, setting the shortening of failure as the probabilistic constraint. The design variables are the stacking sequence orientations of the composite plies while the random parameters are the elastic properties of the material. In order to predict the collapse load properly, post-buckling and progressive failure analyses are considered within the FE solver employed.
Reliability Assessment of SHM Methodologies for Damage Detection
Authors: Tanaka Hidekazu , Sharif Khodaei Zahra
Published: October 2016

Probability-based imaging which illustrates a distribution map of probability of damage presence in structures is a diagnostic method well established for damage detection in sensorized structures. Since the quality of the recorded signal is directly linked to the reliability of the diagnostic outcome, the assessment of robustness of the damage detection methodology is of high significance. In this paper, robustness and reliability of the current probability based imaging algorithms have been assessed for detecting BVID in a composite panel. Consequently, a proposed outlier analysis and DI probability distribution damage detection algorithm was shown to improve the reliability of the detection method.
Dynamic Crack Analysis in Functionally Graded Piezoelectric Materials by a Time-Domain BEM
Authors: Wünsche Michael , Sladek Jan , Sladek Vladimir , García-Sánchez Felipe , Sáez Andrés
Published: October 2016

In this paper, static and dynamic crack analysis in two-dimensional functionally graded piezoelectric composites is presented. For this purpose, a time-domain boundary element method is developed. The collocation method is used for the spatial discretization of the time-domain boundary integral equations, while the convolution quadrature is adopted for temporal discretization. Since fundamental solutions for functionally graded piezoelectric materials are not available, a boundary-domain integral formulation is derived. The Laplace transformed fundamental solutions for homogeneous piezoelectric materials are applied. Special regularization techniques based on a suitable change of variables are used to deal with the singular boundary integrals. The radial integration method is adopted to compute the resulting domain integrals. Adjacent the crack-tips are square-root elements implemented to capture the local square-root-behaviour of the generalized crack-opening-displacements properly. An explicit time-stepping scheme is obtained to compute the unknown boundary data. Numerical examples will be presented to show the influences of the material gradation, poling direction and the transient dynamic loadings on the intensity factors.
Simulation of Environmentally-Assisted Material Degradation by a Thermodynamically Consistent Phase-Field Model
Authors: Falkenberg Rainer
Published: October 2016

Environmentally-assisted material degradation involves mass transport and mechanical processes interacting in the material. A well-known example is hydrogen-induced stress-corrosion cracking. One major challenge within this scope is the quantification of the coupling mechanisms in question. The computational modeling of environmentally-assisted cracks is the key objective ofthis investigation and realised within the theory of gradient-extended dissipative continua with length-scales. The modeling of sharp crack discontinuities is replaced by a diffusive crack model based onthe introduction of a crack phase-field to maintain the evolution of complex crack topologies. Withina thermodynamical framework allowing for mechanical and mass transport processes the crack phase-field is capable to model crack initiation and propagation bythe finite element method. As complexcrack situations such as crack initiation, curvilinear crack patterns and crack branching are usuallyhard to realise with sharp crack models, they can be assessedwithout the requirement of a predefinedcrack path within this method. The numerical modeling of a showcase demonstrates a crack initiationas well as a crack propagation situation with respect to the determination of stress-intensity factors; acrack deviation situation with a curvilinear crack path is modeled by the introduction of a geometricalperturbation and a locally enhanced species concentration
Grinding of Cermets with Cup-Wheels
Authors: Badger Jeffrey , Drazumeric Radovan , Krajnik Peter
Published: October 2016

Cup-wheels are frequently used to grind cermets, a difficult-to-grind material. An investigation was made into the transient geometry of the cup-wheel rim, grit dulling, wheel loading, and wheel self-sharpening with chip thickness. Tests were performed on a saw-tip grinding machine and specific energies, G-ratios and rim geometries were measured. Results showed that, like grinding of tungsten-carbide, loading is prevalent. However, unlike grinding of tungsten-carbide, grit dulling is also prevalent and wheel conditioning is of limited use. Much better results, particularly with respect to surface finish, can be obtained if the wheel is trued to a predetermined geometry. In addition, grinding parameters must be chosen to induce wheel self-sharpening. Practical recommendations are given.
Modeling of Kerf Profile Generated in Multi-Layered Laminate Composites with Abrasive Waterjet
Authors: Singh Ngangkham Peter , Srinivasu D.S. , Ramesh Babu N.
Published: October 2016

Kerf profile generated by abrasive waterjet (AWJ) machining process has always been an interesting area as it dictates the quality of the part. However, due to the non-deterministic nature of the process, it is a challenging task to predict it. On the other hand, understanding and controlling the kerf profile in multi-layered structures (MLSs) is a further difficult task as various layers made of different materials respond to erosion in a different manner and results in a completely different kerf shape (barrel or x-shaped kerf profile) due to the material removal mechanisms dependency on the material property of the specific layers, jet divergence and position of specific layer. Therefore, it is important to understand and develop predictive models of resulting kerf profile in MLSs so that they can be used in controlling the accuracy of the resulting kerf which in turn dictates the final part accuracy. The attempts in this direction are very limited although some modeling efforts are reported in homogeneous materials (metals, ceramics). For the first time, an analytical model for predicting the kerf profile generated in MLS machining with AWJ was presented in this research work. Discretized form of Hashish model was used for determining depth of cut. The effect of jet divergence from the experimentally obtained values, upon passing through the upper layer has been considered. The developed predictive model was validated by the kerf shapes obtained from the experimental trials on metal-adhesive-rubber MLS. Kerf profiles obtained from the simulations have captured the resulted convergent-divergent (X-shaped) profile, while cutting metal-rubber laminate composite, effectively. Furthermore, the effectiveness of the proposed analytical model was demonstrated by generating the various kerf shapes generated at various jet traverse rates.