bluuebunny/crossref_metadata_2025 huggingface dataset:
Prácticas de convivencia de la comunidad universitaria relacionadas con exclusión y la otredad en personas con discapacidad y grupos étnicos en la Universidad Santiago de Cali, 2016
Authors: Vásquez Lara César Augusto , Arenas-Quintana Bellazmin , González Osorio María Fernanda , Muñoz Borja Patricia , Velasco Holguín Lyda , Gonzalez Restrepo Luz Dary
Published: December 2017

La investigación indago las prácticas de convivencia en torno a la otredad y la exclusión en la comunidad universitaria de la Universidad Santiago de Cali, particularmente en los grupos étnicos afro e indígenas, así como en las personas con discapacidad para revisar las prácticas  de convivencia y otredad de estos grupos poblacionales, donde se recogen procesos de exclusión, visibilización/invisibilización y sus interacciones como un asunto multicausal, entender sus consecuencias, estructuras, vías de producción y reproducción
La socio-matemática en aulas hospitalarias
Authors: Salgado Bocanegra Camilo
Published: December 2017

Los espacios no convencionales para la enseñanza de las matemáticas en el aula no regular, hacen parte de los retos a los que se enfrentan los docentes, debido a las necesidades de cubrir nuevos escenarios de carácter académico. Tal es el caso de las aulas hospitalarias, una estrategia, lúdico-pedagógica, que brinda apoyo académico a estudiantes que, por diversas situaciones de salud, se ven en la obligación de ausentarse del aula tradicional en sus colegios de origen.
Semillero de Ingeniería de Rehabilitación EIA-CES
Authors: Velásquez Gómez Juliana , Sierra Restrepo Carolina , Mejía Jaramillo María Clara , Vargas González Manuela , Arango Velásquez Juan Pablo , Restrepo Arango Paulina , Gómez Vélez Paula Andrea , Fuentes Vélez Susana
Published: December 2017

La discapacidad es una interacción entre los estados de salud (enfermedades, lesiones, entre otros) y los factores contextuales (factores ambientales y personales). En el semillero de Ingeniería de Rehabilitación de la Universidad EIA se evalúan usuarios en situación de discapacidad para realizarles productos de apoyo a la medida. Este semillero es voluntario y cuenta con recursos económicos limitados. Se caracteriza por tratar cada caso individualmente y no generalizar, ya que se tiene claro que cada persona tiene sus particularidades, así tengan el mismo diagnóstico, buscando satisfacer las necesidades que cada paciente tenga. Para la fabricación de los productos de apoyo se desarrolló un protocolo que busca que el producto final cumpla con los criterios de usabilidad (Facilidad de aprendizaje, eficiencia, entre otros).
Responsabilidad social del Estado frente al acceso a los servicios de rehabilitación de personas con parálisis cerebral de Bucaramanga, 2013
Authors: Martínez-Marín Rocío Del Pilar , Bueno-Balaguer Luz Amanda , Angarita-Fonseca Adriana
Published: December 2017

La accesibilidad a los servicios de salud, para las personas con parálisis cerebral (PC) puede estar influenciada por factores determinantes como la capacidad de los usuarios para buscar y obtener atención, la forma de organización de los servicios que garantice la atención oportuna e integral y las relaciones que se establecen entre la población, los aseguradores, las entidades territoriales y los prestadores de servicios de salud. En este aspecto, el DANE reporta que el 61% de la población con discapacidad total en Colombia no recibe tratamiento de rehabilitación por causas relacionadas con factores económicos, siendo responsabilidad del estado garantizar la salud de las personas, como derecho fundamental, dicha situación lleva al uso de recursos como la acción de tutela para conseguir los servicios que requieren
Em Busca das Práticas: Contribuições Epistemo-metodológicas das Teorias da Prática aos Estudos da Gestão Social
Authors: De Paiva André Luiz , Alcântara Valderí De Castro , Cruz Elaine Santos Teixeira , Andrade Luis Fernando Silva
Published: December 2017

Na busca pela consolidação/problematização do campo de conhecimento da gestão social e sua natureza voltada para uma gestão dialógica e democrática, objetivamos neste artigo explorar como as teorias da prática contribuem para a compreensão das ‘práticas de gestão social’ e da ‘gestão social como prática’ em suas relações constitutivas com os praticantes, as práxis e os contextos em que estão inseridas. Buscamos as contribuições de abordagens teóricas marcadas pela reconhecida virada prática, especialmente, pela sua recepção no campo das ciências da administração a partir dos estudos da ‘estratégia como prática’ (SAP). A perspectiva da estratégia como prática contribui a partir da noção de que a gestão social é uma atividade compartilhada pelos sujeitos envolvidos (praticantes). Entendemos que a gestão social como vem sendo desenvolvida demanda uma práxis entendida como atividade social reflexiva e transformadora que permite avançar no estudo e fomento de uma gestão contextualizada e sustentada intersubjetivamente.
Os Conselhos Gestores de Políticas Públicas: espaços de consolidação da administração pública societal?
Authors: Ribas João André Nascimento , De Meza Maria Lucia Figueiredo Gomes
Published: December 2017

A administração pública gerencial, adotada no Brasil na década de 1990, aliada ao neoliberalismo, resultou em avanços insuficientes das políticas socioeconômicas e em centralismo decisório sobre a vida pública. Por isto, reacenderam-se discussões sobre um modelo ideal de administração, que se traduziram em experiências como as dos conselhos gestores de políticas públicas, com intuito de delinear um desenho institucional de partilha de poder assente na administração societal. Entretanto, dada a continuidade dos pressupostos gerenciais no país, faz-se pertinente analisar se tais conselhos têm se efetivado como práticas da administração societal. Por meio de uma pesquisa descritiva e bibliográfica, levantou-se que tais colegiados, enquanto compostos pelas disfunções apresentadas, servem mais como instrumento de gerencialismo do que como consolidação do modelo societal. Por isso, aponta-se que as disfunções dos conselhos gestores podem ser solucionadas sob a luz da burocracia weberiana e da cidadania republicana para se consolidarem como modelo de administração societal.
Transversalidade e Intersetorialidade: mapeamento do debate conceitual no cenário brasileiro
Authors: Marcondes Mariana Mazzini , Sandim Tatiana Lemos , Diniz Ana Paula Rodrigues
Published: December 2017

O reconhecimento da complexidade de problemas sociais tem levado à criação de novos arranjos de gestão que viabilizem a integração de políticas públicas. Esse processo tem sido acompanhado pelo crescente interesse acadêmico sobre as estratégias para a promoção de soluções integrais, entre as quais se destacam a intersetorialidade e a transversalidade. Nesse contexto, buscamos compreender como essas temáticas têm sido tratadas na gestão pública, em nível governamental e acadêmico. Para tanto, primeiramente, discutimos como a transversalidade e a intersetorialidade têm sido incorporadas em políticas públicas, desenvolvidas principalmente em nível federal. Em seguida, realizamos a análise de dados bibliométricos e de perspectivas conceituais adotadas em artigos nacionais sobre os temas disponibilizados no SCIELO. A partir deste estudo, constatamos que a dispersão conceitual presente nas narrativas governamentais está refletida nos trabalhos acadêmicos. Findamos esse artigo identificando suas contribuições para o desenvolvimento da pesquisa e para o adensamento teórico dos conceitos analisados.
Anais do 7º Congresso da FOA - UNESP
Authors: Jacinto Rogério de Castilho
Published: December 2017

EditorialO 7º Congresso de Odontologia da Faculdade de Odontologia de Araçatuba - Unesp ocorreu na cidade de Araçatuba, no período de 24 a 27 de maio de 2017, nas instalações do Campus da Rodovia Marechal Rondon, e fez parte da comemoração dos 60 anos da Faculdade de Odontologia. O Congresso foi organizado pelo Departamento de Odontologia Restauradora da FOA-UNESP, e contou com a participação de alunos da graduação e pós-graduação nas comissões organizadoras.  Os homenageados foram o Professor Adjunto Mauro Juvenal Nery e o ProfessorTitular Miguel Russo.O público alvo do evento incluiu estudantes da graduação em odontologia e áreas afins, cirurgiões-dentistas, técnicos e assistentes em saúde bucal e pós-graduação na área de Odontologia e demais áreas afins, docentes e pesquisadores de todo o Brasil. Foram realizadas 670 adesões ao Congresso e 377 inscrições de trabalhos científicos para apresentação durante o congresso, dos quais 43 foram premiados. Foram oferecidos 22 de cursos/workshop. Os trabalhos de pesquisa foram apresentados nas formas de painel, painel digital e apresentação oral e dividida nas seguintes categorias: Graduação, Pós-Graduação, Pibic Júnior (alunos do ensino médio que realizam iniciação científica na Faculdade), e trabalhos vinculados a atividades/projetos de Extensão. Os trabalhos apresentados em Inglês concorreram ao Prêmio Professor Eugênio Zerlotti.Fez parte do 9º Congresso o Encontro do CAOE que, além de sua programação científica, também promoveu uma oficina de Pintura para pacientes do CAOE e interessados, com a artista plástica Artista Plástica Tânia Regina Pardo. E a pintura de painel com a participação especial da professora de dança Ana Eliza Antunes. Na mesa redonda sobre o trabalho desenvolvido no CAOE, além do Diretor e Vice-Diretor da FOA, contou com a presença dos Promotores de Justiça Henrique Castilho e Joel Furlan.Gostaríamos de agradecer à CAPES que apoiou o evento através do Edital PAEP de 2016 e também as empresas que participaram da feira expositoras ou que mandaram material para contribuir com o Evento, ou custearam a vinda de alguns palestrantes como por exemplo: Easy equipamentos Odontológicos, Colgate, Ultradent Products inc, Empório Craft, Dentsply Sirona, Angelus Soluções Odontológicas, Tomoson Diagnóstico por imagem, Blog opalini.com, Haeraus Kulzer, LM instrumental Odonto-médico, Kavo Kerr group, Geistlich Pharma, Nova DFL, Ata Visual, Curaprox, Guaraná Paulistinha, PHS Wellness, Araça Prolab, Micro Imagem, Tokuyama Dental, LPD Shinobu & Itamar, MOM manequins Odontológicos Marília, Quinelato, Oral B, Docmar Instrumentais.Assim, agradecemos a todos que participaram e contribuíram para a realização do Evento. Prof. Adjunto Rogério de Castilho JacintoPresidente do 7º Congresso da FOA-UNESP
Sociolinguistic conotation of the term “chimerical groups” in school
Authors: Tsankov Nikolay , Guyviiska Veska
Published: December 2017

Chimerical groups at school are a new pedagogical reality observed in the behavior of communities prone to deviant activities. The different interpretations link these communities to difficult children, youth subcultures, and street gangs while chimerical groups are a possible conceptual projection on them. We are attempting at a sociolinguistic reading of the term “chimeric group at school” as a community off children and adolescents with deviant behavior but not juvenile offenders, which makes us face legal terms and delinquent behavior. A chimerical group of dealers, pimps, prostitutes and other subjects with deviant behavior at school imitates the behavior of criminal groups in society, borrowing mechanisms and means and also creating their own ones through social networks. The studying of the sociolinguistic connotations of the term “chimeric group” allows the estimation of the preparedness of the pedagogical community to adequately perceive this phenomenon and deal with it accordingly.
Obstacles to inclusion- perceptions of teachers from Bosnia and Herzegovina
Authors: Biscevic Inga , Zecic Sadeta , Mujkanovic Elvira , Mujkanovic Edin , Memisevic Haris
Published: December 2017

Inclusive education is increasingly becoming a dominating paradigm of the educational system in Bosnia and Herzegovina. However, although supported by positive legislature, there are still numerous obstacles to inclusion. The goal of the present study was to examine the attitudes of regular education teachers towards inclusive education, more specifically towards obstacles to successful inclusion. The sample consisted of 200 elementary school teachers from two cantons in Bosnia and Herzegovina. The greatest obstacle for inclusion as perceived by the teachers was the lack of professionals trained to work with children with special educational needs in regular schools. It is of utmost importance to support regular education teachers in their efforts to support all students in their classes. This calls for a more meaningful and thorough reformation of regular schools.
Psychosocial characteristics of students with learning disabilities
Authors: Ališauskas Algirdas , Galvydytė Jelena
Published: December 2017

The article describes the psychosocial characteristics of students with learning disabilities. Qualitative data collection and processing (interview and interview content analysis) and quantitative (socio-metric research) methods have been applied. Positive and negative psychosocial (emotional self-satisfaction/feeling, self-actualisation and self-expression and inter- personal relations) characteristics of a student with learning disabilities have been distinguished and defined. The social status of these students has been ascertained within the class and the motives of the  classmates in their choices have been revealed.

A psychosocial portrait (according to feeling well, self- actualisation, and the quality of interpersonal relationship) of a student with learning disabilities is ambiguous, reconciling both positive and negative characteristics. In the class, a relatively high status of students with learning disabilities has been identified. Positive and negative classmate’s choices mostly related to personal qualities and acceptable or unacceptable behaviour of the students with learning disabilities. An analysis of interview content revealed the factors determining self-esteem, self-expression, and interpersonal relationships of students with learning disabilities.
As três tendências da guerra cibernética: novo domínio, arma combinada e arma estratégica
Authors: Teixeira Júnior Augusto Wagner Menezes , Lopes Gills Vilar , Freitas Marco Túlio Delgobbo
Published: December 2017

O presente trabalho analisa como a guerra cibernética impacta a conduta da guerra hodierna. Partindo da teoria da guerra de Clausewitz e dos debates sobre revolução dos assuntos militares e poder aéreo, postulam-se três tendências com distintos níveis de modificação das formas de beligerância advindos do ciberespaço. A primeira delas se refere à criação de um novo domínio, o cibernético. A segunda vislumbra a incorporação do ciberespaço à guerra enquanto arma combinada, ou seja, incorporando-a aos instrumentos de força convencionais para a produção de efeitos cinéticos. A terceira tendência estipula o uso da guerra cibernética como uma arma estratégica, em moldes pareios aos da estratégia de dissuasão nuclear. Em termos metodológicos, a pesquisa se baseia, em primeiro plano, na revisão bibliográfica da literatura de segurança internacional e guerra cibernética e, secundariamente, na análise histórica dos seguintes acontecimentos recentes: Rússia-Estônia (2007), Rússia-Geórgia (2008), Stuxnet (2010) e Rússia-Ucrânia (2014). Objetiva-se assim construir um quadro de análise para melhor compreender como o fenômeno da guerra cibernética afeta a conduta da guerra do século XXI.
Energiewende: german energy policy in times of green transition
Authors: Reis Solange
Published: December 2017

Germany has developed an ambitious strategy to increase the share of renewable sources in its energy matrix and to enable the transition to a green industrial paradigm. Known as Energiewende, the policy implied profound structural transformations in the energy system. Participation of the residents and of small entrepreneurs stands out among its particularities. The state leads the transitional project by mediating the divergent interests among social and economic agents. The challenge is to maintain social consensus despite unequal costs. Individual consumers, farmers and some industries faced high electricity prices while energy-intensive industries were exempt, a disparity that attracts much criticism. The project involves dismantling nuclear power plants, which leads to increasing use of coal or natural gas. Another challenge is to keep investments on track. This article presents the topic from its historical development and shows that German energy strategy surpasses moral and economic concerns. Beyond economics and energy security, it is a broader plan to place the country in the vanguard transition to green capitalism.
O papel do Brasil na evolução das Operações de Paz
Authors: Rodrigues Anselmo De Oliveira , Migon Eduardo Xavier Ferreira Glaser
Published: December 2017

O presente artigo tem como objetivo revisar a evolução conceitual das operações de paz sob a égide da Organização das Nações Unidas (ONU), destacando a contribuição brasileira no contexto dessas. Para isso, inicialmente, é apresentada a preocupação da sociedade com as questões associadas à paz e à guerra, apresentando a criação da ONU nesse cenário. Ainda na primeira seção, é definida a taxonomia do artigo e seus principais aspectos. Nesse enfoque, o presente trabalho tomou, como base de estudo, as operações de paz ocorridas no período compreendido entre o término da 2ª Guerra Mundial e o ano de 2016. Nas quatro seções seguintes, são analisadas as gerações de operações de paz, destacando suas principais características e o papel do Brasil nessa dinâmica, ressaltando os aspectos qualitativos e quantitativos da contribuição brasileira. Na última seção, é realizada uma análise da evolução das missões de paz e a contribuição brasileira nesse processo.
As disputas sino-vietnamitas no Mar do Sul: desafios para além da questão regional
Authors: Pautasso Diego , Leite Alexandre Cesar Cunha , Doria Gaio
Published: December 2017

O presente artigo tem por objetivo analisar a situação atual das relações entre a China e o Vietnã na questão relativa às disputas territoriais no Mar do Sul da China. Por um lado, China e Vietnã convergem em seus regimes políticos e modelos econômicos, além de participar de processos de integração regional conjuntos. Por outro, possuem interesses políticos e territoriais divergentes sobre espaços no Mar do Sul da China, região estratégica nos âmbitos comercial e geopolítico. Trata-se de um dos litígios territoriais mais importantes envolvendo os países da região e seus potenciais aliados, com destaque para a forte penetração dos Estados Unidos (EUA). É, pois, um tema complexo que engloba questões militares, econômicas e diplomáticas, com desdobramentos para o sistema internacional. O argumento proposto é que esse litígio tende a determinar não apenas a evolução das relações bilaterais  sino-vietnamitas, mas a dinâmica de integração regional e, sobretudo, a projeção de poder dos Estados Unidos em uma porção chave do mundo oriental.
“Ganhei na loteria! Mas e o prêmio?”: a mobilização sócio-legal do direito internacional dos direitos humanos no caso da guerrilha do Araguaia
Authors: Bernardi Bruno Boti
Published: December 2017

Tendo como base as perspectivas de usuários do sistema interamericano de direitos humanos no caso Gomes Lund (guerrilha do Araguaia), o objetivo deste artigo é discutir as potencialidades e eventuais limites da mobilização sócio-legal do direito internacional dos direitos humanos. Utilizando o marco teórico da literatura sobre disputas jurídico-legais dos movimentos sociais nos planos doméstico e transnacional, argumenta-se que o litígio produziu experiência empoderadora no plano ideacional-simbólico, impactando a agenda política nacional e fortalecendo tanto a mobilização social quanto o potencial de contestação jurídico-legal nos tribunais nacionais, muito embora o cumprimento do Estado com a sentença seja baixo em termos de decisões judiciais e mudanças de políticas públicas. Porém, devem ser levados em conta efeitos potencialmente limitadores da mobilização do direito sobre a prática política de atores e movimentos sociais. A natureza normatizada, burocrático-legal e altamente complexa do direito internacional dos direitos humanos pode impor constrangimentos à linguagem e às estratégias contestatórias de atores societais.
Temas de Relações Internacionais nos discursos de posse de presidentes e de chanceleres brasileiros (1995-2017)
Authors: Rocha Felipe Ferreira de Oliveira
Published: December 2017

O artigo investiga as ênfases temáticas de presidentes e de chanceleres brasileiros durante os seus pronunciamentos de posse. O objetivo principal é saber se tais atores políticos tenderam a manter um padrão de continuidade no que tange à priorização de temas e categorias ou se os mesmos tendem a minimizar e maximizar citações de forma específica e particular. Para verificar isso, técnicas de análise de conteúdo e de mineração textual foram empregadas. Através delas, constatou-se a existência de uma continuidade, no sentido de que há categorias que são constantes na sua insignificância, independente do ator. Há também categorias que, via de regra, são mencionadas repetidamente em todos os pronunciamentos. Ademais, ao considerar medidas associativas e de distâncias de palavras, foi possível agrupar os atores em níveis de proximidade. Nesse aspecto, é visível um agrupamento muito coeso entre os chanceleres, ao passo que os presidentes tendem a se localizar de forma mais esparsa.
A condição semiperiférica do Brasil na economia mundo capitalista: novas evidências
Authors: Ouriques Helton Ricardo , Vieira Pedro Antonio
Published: December 2017

Sob vários indicadores econômicos e sociais, o Brasil ocupa uma posição considerada “intermediária” na economia-mundo capitalista. Dentro do marco teórico da análise dos sistemas-mundo, que fundamenta nossa investigação, o Brasil pode ser considerado um Estado semiperiférico. Essa conceituação foi criada originalmente por Immanuel Wallerstein nos anos de 1970, quando lançou sua principal obra (O moderno sistema-mundial). Posteriormente, o conceito de semiperiferia foi refinado e fundamentado em termos empíricos por Giovanni Arrighi e alguns colaboradores de pesquisa na segunda metade dos anos de 1980. O Brasil, nesses estudos, aparece em alguns períodos como periferia, em outros como semiperiferia. Do nosso ponto de vista, e com base em dados estatísticos e também na interpretação da conjuntura econômica, política e social das últimas duas décadas, é possível afirmar que o Brasil se tornou um importante membro da semiperiferia, embora essa posição possa estar ameaçada pela persistência de problemas estruturais que dificultam acompanhar as mudanças em ciência, tecnologia e inovação, em curso desde a década de 1970.
Roller spinning forming regularity
Authors: Pan Yang , Xueguang Li , Zhe Chen , Yang Yu
Published: December 2017

In this paper we use ABAQUS finite element analysis software to design the 3D model. We observed the forming rule of grooved V-shaped pulley during the spinning process, and the impact of rotary working angle and processing temperature on V-belt forming is calculated. The results of this study provide us some theoretical information and pragmatics value for spinning pulley in veritable production.
The fabrication of electrochemical geophone based on FPCB process technology
Authors: Yang Dapeng , Pan Lizhi , Mu Tingting , Zhou Xiaohua , Zheng Fan
Published: December 2017

The subject of the studies presented in this paper is the fabrication of electrochemical geophone, especially the electrochemical transducer with symmetrical four-electrode cell by FPCB process technology. The geophone assembled by transducer, dumbbell-shaped tube, highly-flexible membranes, electrolyte solution and signal-amplification circuit, is calibrated using a standard vibration platform, and the results show a good consistency of each geophone parameters. Coupled with low cost, the electrochemical geophone by FPCB shows a good potential application prospect.
An analytical modeling for high-velocity impacts on woven Kevlar composite laminates
Authors: Fangyu Chen , Li Zhou , Yihao Tang , Xiaoming Zhou
Published: December 2017

In this paper, an analytical model, which based on energy balance, is built to study the process of high velocity impacts on woven Kevlar composite laminates by a cylindrical projectile. Four different mechanisms, such as laminate crushing, linear momentum transfer and tensile fiber failure, and shear plugging, is absorbed by the laminate while impacting. Then, simplification of the model is done to obtain the residual velocity and ballistic limit. The analytical results are validated with the results of experiment, and the perturbation analysis is done to analyze the reason of error.
Design and finite element simulation of an ultrasonic transducer of two piezoelectric discs
Authors: Xu Jinkai , Huanhuan Ren
Published: December 2017

With the developing of ultrasound technology and expending of it’s application scope, new requirements for the structure and the energy radiation of the transducer are presented. A reasonable design and manufacture of the transducer ensures that the energy can be transmitted with minimal loss. Based on the longitudinal vibration equation, a sandwich piezoelectric transducer which can be used in the field of precision machining, medical and other fields is designed and simulated in this paper. Different from the ordinary transducer, the front cover of this transducer is also a horn which can amplify the output amplitude compared to an equal section circular bar. ANSYS15.0 is used to calculate and analyze the transducer model with using HyperMesh (HM) software to generate the mesh to ensure the quality of the mesh. The finite element analysis software can calculate the transducer modal and harmonic response, and the results can be used to compare with theoretical design. The design frequency of the transducer is 20 kHz, the error between the simulation and the theoretical value is less than five percent, the result obtained by ANSYS is very close to the theoretical design.
Theoretical and experimental investigation of the tube-shaped waveguide wire
Authors: Kargaudas Vytautas , Bubulis Algimantas , Navickas Jonas , Vitkus Linas , Venslauskas Mantas
Published: December 2017

Cardiovascular diseases are the leading cause of death among people up to 65 years old. One of the most common cardiovascular disease is thrombosis. To remove the blood clot inside the artery, usage of advanced invasive mechanical devices is needed. There is a need for the new alternative less risky and hazardous way of arterial thrombosis treatment. This paper presents a new design of a less risky ultrasonic blood vessels cleaning system.
Free vibration of square plate with temperature effect
Authors: Sharma Amit
Published: December 2017

In modern engineering, researchers/scientists are very keen to know first few modes of vibration because it provides how system/structure behaves under vibration. In this paper, author computed the natural vibration of non homogeneous tapered square plate. Here tapered means that plate’s thickness varies linearly along x-axis. Here non homogeneity arises in the plate’s material due to simultaneous variation in density (circular variation) and Poisson’s ratio (exponential variation). Temperature variation on the plate is viewed bi-parabolic along the axes. Rayleigh-Ritz technique is applied to obtain the frequency equation and vibrational frequency modes under different combination of parameters. The findings of the papers are presented in tabular form.
Effect of electrode location and thickness ratio of flange and web on I cross section piezoelectric cantilever beam for its actuation capability
Authors: Atul  , Ranjan Vinayak , Kishore Singh Nand
Published: December 2017

Present work deals with the numerical investigation of a cantilever beam having I cross section made up of piezoelectric material for its actuation capability. The beam is modeled under the assumption of Euler’s Bernoulli equation. Eight cases are considered for different electrode locations. The beam was subjected to voltage loads at different locations. It was noticed that tip deflection increases with increasing applied voltage across the electrodes. Maximum tip deflection was achieved with the increase in voltage with particular electrode arrangement. In this report we have also demonstrated that for downward tip deflection, there are two values of thickness ratio of flange and web for a given tip deflection at a given applied voltage.
Chaos analysis of ship rolling motion in stochastic beam seas
Authors: Li Shenghong , Wang Kangkang
Published: December 2017

In this paper, the chaotic motion of ship roll in stochastic beam seas, which is regarded as a bounded noise is investigated in detail. The stochastic Melnikov approach is applied to the model and the criterion for the chaos in the mean-square sense is derived. The chaotic thresholds of noise parameters obtained by means of the stochastic Melnikov process are verified by the numerical safe basin. Besides of the factors of noise disturbances, the effects of the other parameters in the system on safe basin are also discussed systematically. The varieties of coefficients of the restoring moment can also induce the erosion of safe basin and lead to the occurrence of the chaos. On the other hand, the increase of damping coefficients can enhance the safe domain of ship sailing.
Numerical simulation of the relationship between underwater jets oscillation and shock wave
Authors: Tang Yunlong , Li Shipeng
Published: December 2017

In order to study the relationship between an underwater shock wave and jet thrust oscillation, a simulation model of underwater jet is established. As per a numerical calculation based on the SST (Shear Stress Transport), and VOF (Volume of Fluid) models, the flow speed of jet gas has been changed with the pressure ratio. When the jet speed becomes supersonic, its corresponding shock structure will occur. When the pressure ratio is small, the shock wave structure in the nozzle is normal, and in case of an increase of the jet speed, the jet is moving from the nozzle inside to the outside. When the pressure ratio reaches a certain number, the shock is out of nozzle, and the nozzle is operating in an over-expansion state, the thrust oscillation amplitude is high. When the pressure ratio is large, and the nozzle is operating in the under-expanded state, then the structure of shock wave is very complex, jet back-attack no longer appears, and the thrust amplitude is rather smaller than the over-expanded one. Two kinds of situations are compared. And the comparison revealed that the highly under-expanded state is more conducive to the stability of the underwater vehicle, which can provide a reference for the corresponding design.
Torsional vibration analysis of crank train with low friction losses
Authors: Drápal Lubomír , Novotný Pavel
Published: December 2017

High level of mechanical efficiency is exacted from internal-combustion engines. The reduction of friction losses of crankshaft main bearings can significantly contribute to the enhancement of this efficiency. For this purpose, an innovative design of a crankshaft is developed. The potential of computational modelling during the development of this innovative crank train is described in the article. The dynamics of the whole crank train is solved by using a multi-body system software, where flexible finite-element bodies along with hydrodynamic bearings are incorporated. Regarding the simulation results, attention is paid to the torsional vibration and its analysis, including concept design of a torsional damper, because a reduction of friction losses is associated with the improvement of torsional vibration in this case.
Research on dynamic characteristics of spiral basilar membrane after replacing artificial auditory ossicle based on the reconstructed human ear model
Authors: Wang Yu , Xue Hong Mei
Published: December 2017

In this paper, PATRAN software was used to establish a complete 3D finite element model of human ears, and it was then combined with NASTRAN software to analyze frequency responses. This paper conducted a detailed analysis on the dynamic parameters including umbo and stapes displacements of normal human ears under sound pressures 90 dB and 105 dB. The numerically computational results were compared with experimental data. When the analyzed frequency was less than 1000 Hz, the computational result of numerical simulation was well consistent with the upper limit. When the analyzed frequency was more than 1000 Hz, the computational result of numerical simulation was well consistent with the lower limit. Therefore, the numerically computational model was reliable. In addition, based on the verified model, this paper studied vibration characteristics of spiral basilar membrane after replacing artificial auditory ossicle based on the whole hearing system, and found that vibration characteristics of spiral basilar membrane had an obvious change at low and high frequencies after replacing artificial auditory ossicle TORP. Using finite element method to analyze vibration characteristics of spiral basilar membrane can well predict the hearing recovery effect after replacing artificial auditory ossicle. Compared with normal ears, the vibration level of spiral basilar membrane after replacing artificial auditory ossicle has slowed down in 100 Hz-600 Hz, 2000 Hz-4000 Hz and 7000 Hz-10000 Hz, and has been strengthened in 600 Hz-2000 Hz and 4000 Hz-7000 Hz, which provided some help for the hearing recovery at the high-frequency band.
Analytical modeling of a thin-walled cylindrical workpiece during the turning process. Stability analysis of a cutting process
Authors: Gerasimenko Artem , Guskov Mikhail , Gouskov Alexander , Lorong Philippe , Shokhin Alexander
Published: December 2017

The purpose of this work is to develop a mathematical model of the dynamics of turning a thin-walled cylindrical shell. This model uses a finite number of degrees of freedom and takes into account the variability of dynamic compliance. It is then possible to obtain estimates of the boundaries of stability of the continuous cutting process. The model is based on the theory of shells with application of Galerkin’s method in conjunction with the expansion of the displacement field in beam and trigonometric functions. On the basis of the developed model, an algorithm designed for constructing boundaries of stability of turning of the thin-walled cylindrical parts is presented and compared to experimental results. A strategy to define matter removal sequences is proposed.
EEMD-Based cICA method for single-channel signal separation and fault feature extraction of gearbox
Authors: Leng Junfa , Jing Shuangxi , Luo Chenxu , Wang Zhiyang
Published: December 2017

This paper proposes a novel fault feature extraction method with the aim of extracting the fault feature submerged in the single-channel observation signal. The proposed method integrates the strengths of the constrained independent component analysis (cICA) extracting only the signals of interest (SOIs) with the advantage of ensemble empirical mode decomposition (EEMD) alleviating the mode mixing. The method, which is named EEMD-based cICA, not only enables gear fault feature extraction but also offers a new independent component analysis (ICA) mixing model with source noise and measured noise for the single-channel observation signal. The efficiency of the proposed method is tested on simulated as well as real-world vibration signals acquired from a multi-stage gearbox with a missing tooth and a chipped tooth, respectively.
Simplified calculation method for transverse seismic response of aqueducts considering fluid-structure interaction
Authors: Chen Ying , Huang Jian , Zhang Wenxue , Li Yunkai
Published: December 2017

Aqueduct is the key structure in water conveyance engineering, which may be damaged during earthquake. Although numerous water conveyance designs have been built, the current state of researches on aqueduct aseismic design is inadequate. In this paper, based on the fluid-structure interaction dynamics and response spectra analysis, a simplified analysis method was proposed to evaluate the transverse seismic response of aqueducts, and the simplified calculating results were compared with the results of the nonlinear finite element calculation of fluid-structure interaction and experimental results. The results showed that the simplified analysis method put forward in this paper could be used to evaluate the transverse seismic response of aqueducts. In the condition that the pier height is less than 40 m, the first-order lateral vibration mode of the aqueduct has a higher model contribution rate; the simplified calculation method can achieve extremely high accuracy. The simplified calculation precision decreases as the height increases when the pier height exceeds 40 m.
Adaptive mesh refinement method for optimal control based on Hermite-Legendre-Gauss-Lobatto direct transcription
Authors: Lei Humin , Liu Tao , Li Deng , Ye Jikun
Published: December 2017

Direct transcription has been employed to transcribe the optimal control problem into a nonlinear programming problem. This paper presents a trajectory optimization method based on a combination of the direct transcription and mesh refinement algorithm. Hermite-Simpson method has the advantage of reasonable accuracy with highly sparse Hessian matrix and constraint Jacobians, and the pseudospectral method provides spectral accuracy for optimal control problems. The optimal control problem is discretized at a series of Legendre-Gauss-Lobatto points, then the trajectory states are approximated by using local Hermite interpolating polynomials. Thus, the method produces significantly smaller mesh size with a higher accuracy tolerance solution. The derived relative error estimation is then used to trade the number of mesh polynomials degree within each mesh interval with the number of mesh intervals. As a result, the suggested method can produce more small mesh size, requires less computation solution for the same optimal control problem. The simulation experiment results show that the suggested method has many advantages.
Bending oscillations of a cylinder, surrounded by an elastic medium and containing a viscous liquid and an oscillator
Authors: Mogilevich Lev I. , Popov Victor S. , Kondratov Dmitry V. , Rabinskiy Lev N.
Published: December 2017

The article considers dynamic processes mathematical modeling in a mechanical system, consisting of an elastic hollow cylinder, surrounded by an elastic medium and containing viscous liquid and vibrating coaxial rigid cylinder. The amplitude frequency characteristic for investigating bending cylinder oscillations as one-mass system is defined. It is shown, that the constructed amplitude characteristic makes it possible to define the considered system resonance frequencies oscillations. The calculations demonstrated the significance of taking into account viscous liquid inertia and the surrounding elastic medium.
Rigid-flexible coupling dynamics simulation of planetary gear transmission based on MFBD
Authors: Hao Chiyu , Feng Guangbin , Sun Huagang , Li Haiping
Published: December 2017

This paper deals with the problem of getting dynamic characteristics in complex mechanical multi-body system. Based on the MFBD (Multi-Flexible-Body Dynamics) technology, the rigid-flexible coupling dynamic simulation method is proposed, and then the method is applied to the planetary gear transmission. The results show that the dynamic stress distribution of planetary gear can be obtained to determine the dangerous location, and the dynamic response characteristics are more obvious. Then the simulation model of planetary gear transmission with broken tooth is established, the fault feature extraction in time-frequency domain is carried out using the acceleration signal. In addition, industrial data is also used to validate the effectiveness of the proposed method.
Remaining life assessment for boiler tubes affected by combined effect of wall thinning and overheating
Authors: Kapayeva Sarken D. , Bergander Marek J. , Vakhguelt Anatoli , Khairaliyev Serik I.
Published: December 2017

Boilers, the most troublesome components of electric power, chemical and processing plants generate high costs in unscheduled shutdowns, repairs and power replacement. Every occurrence of ruptured tubes leads to emergency shutdown of the entire plant. This paper describes the joint international effort to develop faster and more efficient methods for condition assessment and remaining life prediction for boiler tubes made of low-carbon steel. Authors have undertaken a systematic research with the major objective to correlate the results of combined nondestructive testing (NDT) with condition assessment of boiler tubes. The evaluation included non-contact wall thickness measurement with EMAT technology plus internal oxide layer measurement with specialized ultrasonics. While the first method shows the remaining tube wall thickness, thus allowing calculating total stress, the latter one has the potential to characterize microstructure degradation, which up to now could only be determined by destructive analysis. The special attention was directed towards identification and analysis of creep damage due to overheating. In recent years, techniques were developed to identify heat damage by measuring the thickness of internal oxide scale because even a thin scale can seriously impede heat transfer causing elevation of temperature in tube wall. A combined effect of wall thinning and the “degree of overheating” on tube remaining life was investigated. The uniqueness of this work lies in one of the first attempts to develop and validate a tool for methodology for condition assessment and remaining life prediction, for Steel20 tube material, while most of previous authors had concentrated on Cr-Mo steels. Another contribution is the combined treatment of two different damage mechanisms and practical utilization of two various NDT techniques. To-date, both results are treated separately, and consequently separate reject criteria exist for overheating and separate for wall thinning. As a result of work presented in this paper, a procedure was recommended to calculate the tube remaining life based on the results of two ultrasonic tests.
The net power control of hydraulic-electricity energy regenerative suspension
Authors: Gong Bian , Guo Xuexun , Xu Lin , Fang Zhigang
Published: December 2017

For achieving the control of hydraulic-electricity energy regenerative suspension (HERS), a novel control algorithm, net power control (NPC), is applied in this study. A HERS unit as a new energy reclaiming suspension device is equipped with an energy-harvesting hydraulic-electricity shock absorber (HESA). The composition and classification of HESA damping force were analyzed based on the basic working principle of HESA. Thus, the mathematical model of HESA damping force is deduced as a function of suspension dynamic speed and load current. A series of experiments were made to verify the reliability of the model. Based on the energy flow analysis of the suspension system, the net power flowing into the suspension is calculated. In order to minimize the vibration acceleration of the vehicle body, a novel net power control is proposed. The comparison result indicates the control effect of NPC is more significant than skyhook control, especially in the high excitation frequency. Also, the HERS bench test was carried out to verify the feasibility of NPC. The related results show that the maximum acceleration of the vibration is improved by 34.23 % with NPC on bump pavement excitation. And on B-class random road, the root mean square (RMS) value of the sprung mass vibration acceleration is reduced by 65 %. Furthermore, the influence of suspension dynamic velocity and deflection on the optimal control load current is obtained.
A novel high-strength large vibrating screen with duplex statically indeterminate mesh beam structure
Authors: Wang Zhenqian , Liu Chusheng , Wu Jida , Jiang Haishen , Song Baocheng , Zhao Yuemin
Published: December 2017

Screening is an indispensable unit process for separation of materials. Large vibrating screen is extensively used in coal processing because of its large production capacity. In this study, a novel large vibrating screen with duplex statically indeterminate mesh beam structure (VSDSIMBS) was presented. The dynamic model of VSDSIMBS was proposed, and characteristic parameters were obtained by theoretical calculations. In order to obtain more reliable and believable research results, model of a traditional vibrating screen (TVS) with the same mass was also established for comparisons with VSDSIMBS. The finite element (FE) method was applied to study the performance of VSDSIMBS and FE analysis of VSDSIMBS and TVS was completed by using characteristic parameters. Modal analysis results indicated that VSDSIMBS could avoid the resonance and run more smoothly than TVS. Furthermore, harmonic response analysis results showed that VSDSIMBS could improve the entire stress distribution, reduce high stress areas, and increase the strength of vibrating screen. With DSIMBS, the maximum stress of vibrating screen decreased from 130.53 to 64.54 MPa. The full-scale experimental tests were performed to validate the credibility and accuracy of FE analysis results. The stress and displacements of VSDSIMBS were measured under working conditions. The test results obtained are in good agreement with simulation results, and accord with conclusions made from FE analysis.
Incremental dynamic analysis of SDOF by using nonlinear earthquake accelerograms based on modified inverse Fourier transform
Authors: Faroughi Alireza , Hosseini Mahmood
Published: December 2017

In evaluation of structures, performing nonlinear response of model over a time analysis or incremental dynamic analysis needs more time. Hence, it can be beneficial if the event history report is carried out with long time steps without loss of accuracy. This study includes a method to simplify of accelerograms meant on the change of their Fourier reports. So, the Fourier Spectrum of the accelerogram is initially determined. Next applying a PC code generation, the similar Inverse Fourier Convert is computed utilizing a comparatively large time stage, depending on the structure’s times; that is ordinarily five to ten times bigger than primary accelerogram’s duration stage to generate the visible accelerogram. This application from the simplified accelerogram apparently takes much less time. Results indicates that the analysis time can be reduced up to 80 % by using the proposed method. While the maximum response shows an error of merely five to ten percent, about the sort of structure and the characteristics of the records used.
Dynamical analysis of a thin-walled rectangular plate with preload force
Authors: Wu Qiong , Gao Hanjun , Zhang Yidu , Chen Long
Published: December 2017

Finite element (FE) models are utilized to investigate the influence of preload force and the stress stiffening on the dynamic characteristics of a thin-walled rectangular plate. An experimental platform system is established to obtain the dynamic characteristics of the specimen using the resonance method. Simulation and experimental results agree well with each other, which validates the effectiveness of the FE model. The results show that the preload force not only improves the overall dynamic performances of the thin-walled plate but also contributes to the local stiffness of the loading position because of the generation of stress.