bluuebunny/crossref_metadata_2025_split huggingface dataset:
Lattice Boltzmann Study of Non-Newtonian Blood Flow in Mother and Daughter Aneurysm and a Novel Stent Treatment
Authors: Shi Y. , Tang G. H. , Tao W. Q. 
Published: July 2016

AbstractUnderstanding blood flow in human body’s cerebral arterial system is of both fundamental and practical significance for prevention and treatment of vascular diseases. The mechanism and treatment for the growth of daughter aneurysm on its mother aneurysm are not yet fully understood. Themain purpose of the present paper is to elucidate the relationships between hemodynamics and the genesis, growth, subsequent rupture of the mother and daughter aneurysm on the cerebral vascular. The intensified stents with different porosities and structures are investigated to reduce the wall shear stress and pressure of mother and daughter aneurysm. The simulation is based on a lattice Boltzmann modeling of non-Newtonian blood flow. A novel stent structurewith “dense in front and sparse in rear” is proposed,which is verified to have good potential to reduce the wall shear stress of both mother and daughter aneurysm. The simulation is based on a lattice Boltzmann modeling of non-Newtonian blood flow. A novel stent structurewith “dense in front and sparse in rear” is proposed,which is verified to have good potential to reduce the wall shear stress of both mother and daughter aneurysm.
Two-Scale Picard Stabilized Finite Volume Method for the Incompressible Flow
Authors: Yang Jianhong , Lei Gang , Yang Jianwei 
Published: July 2016

AbstractIn this paper, we consider a two-scale stabilized finite volume method for the two-dimensional stationary incompressible flow approximated by the lowest equal-order element pairP1—P1which do not satisfy the inf-sup condition. The two-scale method consist of solving a small non-linear system on the coarse mesh and then solving a linear Stokes equations on the fine mesh. Convergence of the optimal order in theH1-norm for velocity and theL2-norm for pressure are obtained. The error analysis shows there is the same convergence rate between the two-scale stabilized finite volume solution and the usual stabilized finite volume solution on a fine mesh with relationh = 𝾪(H2). Numerical experiments completely confirm theoretic results. Therefore, this method presented in this paper is of practical importance in scientific computation.
Numerical Simulation of Deflagration to Detonation Transition in a Straight Duct: Effects of Energy Release and Detonation Stability
Authors: Dou Hua-Shu , Hu Zongmin , Khoo Boo Cheong , Jiang Zonglin 
Published: July 2016

AbstractNumerical simulation based on the Euler equation and one-step reaction model is carried out to investigate the process of deflagration to detonation transition (DDT) occurring in a straight duct. The numerical method used includes a high resolution fifth-order weighted essentially non-oscillatory (WENO) scheme for spatial discretization, coupled with a third order total variation diminishing Runge-Kutta time stepping method. In particular, effect of energy release on the DDT process is studied. The model parameters used are the heat release atq= 50,30,25,20,15,10 and 5, the specific heat ratio at 1.2, and the activation temperature atTi= 15, respectively. For all the cases, the initial energy in the spark is about the same compared to the detonation energy at the Chapman-Jouguet (CJ) state. It is found from the simulation that the DDT occurrence strongly depends on the magnitude of the energy release. The run-up distance of DDT occurrence decreases with the increase of the energy release forq= 50 ~ 20, and increases with the increase of the energy release forq= 20 ~ 5. This phenomenon is found to be in agreement with the analysis of mathematical stability theory. It is suggested that the factors to strengthen the DDT would make the detonation more stable, and vice versa. Finally, it is concluded from the simulations that the interaction of the shock wave and the flame front is the main reason for leading to DDT.
An Efficient Dynamic Mesh Generation Method for Complex Multi-Block Structured Grid
Authors: Ding Li , Lu Zhiliang , Guo Tongqing 
Published: July 2016

AbstractAiming at a complex multi-block structured grid, an efficient dynamic mesh generation method is presented in this paper, which is based on radial basis functions (RBFs) and transfinite interpolation (TFI). When the object is moving, the multi-block structured grid would be changed. The fast mesh deformation is critical for numerical simulation. In this work, the dynamic mesh deformation is completed in two steps. At first, we select all block vertexes with known deformation as center points, and apply RBFs interpolation to get the grid deformation on block edges. Then, an arc-length-based TFI is employed to efficiently calculate the grid deformation on block faces and inside each block. The present approach can be well applied to both two-dimensional (2D) and three-dimensional (3D) problems. Numerical results show that the dynamic meshes for all test cases can be generated in an accurate and efficient manner.
Large Eddy Simulation of a Vortex Ring Impacting a Bump
Authors: Ren Heng , Zhao Ning , Lu Xi-Yun 
Published: July 2016

AbstractA vortex ring impacting a three-dimensional bump is studied using large eddy simulation for a Reynolds number Re = 4 × 104 based on the initial diameter and translational speed of the vortex ring. The effects of bump height and vortex core thickness for thin and thick vortex rings on the vortical flow phenomena and the underlying physical mechanisms are investigated. Based on the analysis of the evolution of vortical structures, two typical kinds of vortical structures, i.e., the wrapping vortices and the hair-pin vortices, are identified and play an important role in the flow state evolution. The boundary vorticity flux is analyzed to reveal the mechanism of the vorticity generation on the bump surface. The circulation of the primary vortex ring reasonably elucidates some typical phases of flow evolution. Further, the analysis of turbulent kinetic energy reveals the transition from laminar to turbulent state. The results obtained in this study provide physical insight into the understanding of the mechanisms relevant to the flow evolution and the flow transition to turbulent state.
Simulation of Vortex Convection in a Compressible Viscous Flow with Dynamic Mesh Adaptation
Authors: Zhou C. H. 
Published: July 2016

AbstractIn this work, vortex convection is simulated using a dynamic mesh adaptation procedure. In each adaptation period, the mesh is refined in the regions where the phenomena evolve and is coarsened in the regions where the phenomena deviate since the last adaptation. A simple indicator of mesh adaptation that accounts for the solution progression is defined. The generation of dynamic adaptive meshes is based on multilevel refinement/coarsening. The efficiency and accuracy of the present procedure are validated by simulating vortex convection in a uniform flow. Two unsteady compressible turbulent flows involving blade-vortex interactions are investigated to demonstrate further the applicability of the procedure. Computed results agree well with the published experimental data or numerical results.
Topology Optimization of the Caudal Fin of the Three-Dimensional Self-Propelled Swimming Fish
Authors: Xin Zhiqiang , Wu Chuijie 
Published: July 2016

AbstractBased on the boundary vorticity-flux theory, topology optimization of the caudal fin of the three-dimensional self-propelled swimming fish is investigated by combining unsteady computational fluid dynamics with moving boundary and topology optimization algorithms in this study. The objective functional of topology optimization is the function of swimming efficiency, swimming speed and motion direction control. The optimal caudal fin, whose topology is different from that of the natural fish caudal fin, make the 3D bionic fish achieve higher swimming efficiency, faster swimming speed and better maneuverability. The boundary vorticity-flux on the body surface of the 3D fish before and after optimization reveals the mechanism of high performance swimming of the topology optimization bionic fish. The comparative analysis between the swimming performance of the 3D topology optimization bionic fish and the 3D lunate tail bionic fish is also carried out, and the wake structures of two types of bionic fish show the physical nature that the swimming performance of the 3D topology optimization bionic fish is significantly better than the 3D lunate tail bionic fish.
A Numerical Study of Jet Propulsion of an Oblate Jellyfish Using a Momentum Exchange-Based Immersed Boundary-Lattice Boltzmann Method
Authors: Yuan Hai-Zhuan , Shu Shi , Niu Xiao-Dong , Li Mingjun , Hu Yang 
Published: July 2016

AbstractIn present paper, the locomotion of an oblate jellyfish is numerically investigated by using a momentum exchange-based immersed boundary-Lattice Boltzmann method based on a dynamic model describing the oblate jellyfish. The present investigation is agreed fairly well with the previous experimental works. The Reynolds number and the mass density of the jellyfish are found to have significant effects on the locomotion of the oblate jellyfish. Increasing Reynolds number, the motion frequency of the jellyfish becomes slow due to the reduced work done for the pulsations, and decreases and increases before and after the mass density ratio of the jellyfish to the carried fluid is 0.1. The total work increases rapidly at small mass density ratios and slowly increases to a constant value at large mass density ratio. Moreover, as mass density ratio increases, the maximum forward velocity significantly reduces in the contraction stage, while the minimum forward velocity increases in the relaxation stage.
Numerical Study of Geometric Multigrid Methods on CPU-GPU Heterogeneous Computers
Authors: Feng Chunsheng , Shu Shi , Xu Jinchao , Zhang Chen-Song 
Published: July 2016

AbstractThe geometric multigrid method (GMG) is one of the most efficient solving techniques for discrete algebraic systems arising from elliptic partial differential equations. GMG utilizes a hierarchy of grids or discretizations and reduces the error at a number of frequencies simultaneously. Graphics processing units (GPUs) have recently burst onto the scientific computing scene as a technology that has yielded substantial performance and energy-efficiency improvements. A central challenge in implementing GMG on GPUs, though, is that computational work on coarse levels cannot fully utilize the capacity of a GPU. In this work, we perform numerical studies of GMG on CPU-GPU heterogeneous computers. Furthermore, we compare our implementation with an efficient CPU implementation of GMG and with the most popular fast Poisson solver, Fast Fourier Transform, in the cuFFT library developed by NVIDIA.
Axisymmetric Stagnation-Point Flow of Nanofluid Over a Stretching Surface
Authors: Nawaz M. , Hayat T. 
Published: July 2016

AbstractThis paper investigates the laminar boundary layer flow of nanofluid induced by a radially stretching sheet. Nanofluid model exhibiting Brownian motion and thermophoresis is used. Series solutions for a reduced system of nonlinear ordinary differential equations are obtained by homotopy analysis method (HAM). Comparative study between the HAM solutions and previously published numerical results shows an excellent agreement. Velocity, temperature and mass fraction are displayed for various values of parameters. The local skin friction coefficient, the local Nusselt number and the local Sherwood number are computed. It is observed that the presence of nanoparticles enhances the thermal conductivity of base fluid. It is found that the convective heat transfer coefficient (Nusselt number) is decreased with an increase in concentration of nanoparticles whereas Sherwood number increases when concentration of nanoparticles in the base fluid is increased.
Use of Text Searching for Trigger Words in Medical Records to Identify Adverse Drug Reactions within an Intensive Care Unit Discharge Summary
Authors: MacLasco Adam , Saul Melissa , Smith Tiffany R. , Kloet Megan , Kim Catherine , Anthes Ananth , Smithburger Pamela , Seybert Amy , Kane-Gill Sandra 
Published: July 2016

SummaryTo evaluate the performance of using trigger words (e.g. clues to an adverse drug reaction) in unstructured, narrative text to detect adverse drug reactions (ADRs) and compare the use of these trigger words to a targeted chart review for ADR detection within the intensive care unit (ICU) discharge summary note.A retrospective medical record review was conducted. Evaluation of ADRs occurred in two phases – targeted chart review of the ICU discharge summary notes in Phase 1 and targeted chart review using specific words and phrases as triggers for ADRs in Phase 2.Four hundred ADRs were documented in 223 patients for Phase 1. For Phase 2, there were 219 ADRs identified in 120 patients. 138 real or accurate ADRs were identified from Phase 1 and 47 duplicate events. 34 ADRs from Phase 2 were not identified in Phase 1. Fifteen of the ADRs were inaccurately presumed in Phase 2. Fifty-eight of 127 text triggers identified at least one ADR. Low and moderate frequency trigger words were more likely to have PPVs > 5%.Targeted chart review using specific words and phrases as triggers for ADRs is a reasonable approach to identify ADRs and may save time compared to other methods after further refinement leads to a more accurately performing trigger word list.
Citation: Kane-Gill SL, MacLasco AM, Saul MI, Politz Smith TR, Kloet MA, Kim C, Anthes AM, Smithburger PL, Seybert AL. Use of text searching for trigger words in medical records to identify adverse drug reactions within an intensive care unit discharge summary.
DEGRADAÇÃO AMBIENTAL NO MUNICÍPIO DE PARARI-PB: UMA ANÁLISE POR MEIO DE SENSORIAMENTO REMOTO
Authors: Silva Glauciene Justino Ferreira da , Almeida Nadjacleia Vilar 
Published: July 2016

A exploração não sustentada da cobertura vegetal, dos recursos hídricos e do solo em uma região traz sérias implicações à manutenção do equilíbrio ambiental. Em regiões semiáridas, por exemplo, a degradação das terras provoca o assoreamento dos rios, interfere nas propriedades físico-químicas dos solos e afeta a biodiversidade, modificando a paisagem. Para o monitoramento mais eficiente das alterações e o planejamento adequado no combate à destruição do bioma Caatinga é necessário o monitoramento da degradação. Nesse contexto, esse trabalho tem como objetivo quantificar a degradação da cobertura vegetal no município de Pararí-PB, fornecendo subsídios para analisar e caracterizar a dinâmica da vegetação de caatinga existente na área. Foram utilizados como suporte metodológico o Sensoriamento Remoto, o SIG e técnicas de análise espacial. A quantificação da cobertura das terras mostrou que a classe solo exposto em 1988 e 1999 representava, respectivamente, 89,54% e 80,59% da área total do município. Em detrimento da vegetação densa que em todo período representou os menores percentuais em relação à área de estudo. O NDVI variou de -1 e 0,40, sendo influenciado pela resposta da vegetação a precipitação nos meses considerados chuvosos e secos, o que afetou significativamente a resposta desse índice para a área em estudo. Devido ao desmatamento, as áreas mais degradadas no município, apresentam solos com alto nível de desgaste que impossibilita o desenvolvimento da vegetação de caatinga densa, a umidade proporcionada pela precipitação não altera a paisagem das áreas degradadas.
INDUSTRIALIZAÇÃO DO MUNICÍPIO DE LONDRINA-PR: PROCESSO INICIAL E TRANSFORMAÇÕES RECENTES
Authors: Saab Thiago Bueno , Bragueto Cláudio Roberto 
Published: July 2016

O município de Londrina, situado no norte do Paraná, é o segundo mais populoso do estado. Apresentou um crescimento importante do setor industrial a partir dos anos de 1990, porém, poucos estudos trataram desta temática. O presente artigo verifica a industrialização do município de Londrina durante o período compreendido entre os anos de 1992 a2011, tendo ainda os seguintes objetivos específicos: analisar a dinâmica industrial londrinense; evidenciar quais são os ramos industriais mais relevantes e efetuar um breve relato sobre a construção histórica da industrialização em Londrina. Também foi realizada uma classifcação metodológica dos níveis de intensidade tecnológica, a qual resultou na agrupação dos ramos industriais em dois grupos: os de menor e os de maior intensidade tecnológica. A metodologia utilizada pautou-se na busca por bibliografias de cunho teórico-conceituais, em especial sobre a reestruturação produtiva recente e sobre a industrialização de Londrina. Os dados sobre estabelecimentos, número de pessoal ocupado e valor adicionado foram obtidos de consultas a bancos de dados do Instituto Paranaense de Desenvolvimento Econômico e Social (IPARDES) e da Relação Anual de Informações Sociais (RAIS), a qual tem vínculo com o Ministério do Trabalho e Emprego. Como resultado, fica claro que Londrina tem, desde 1990, um efetivo crescimento industrial, concentrado principalmente nos ramos de menor intensidade tecnológica. Este crescimento ocorreu principalmente em função das condições gerais de produção estabelecidas historicamente, uma vez que o principal instrumento de atração de investimentos adotado pelo estado do Paraná, no período, apresentou um número reduzido de empresas instaladas no município.
Sobre pessoa e referencialidade no português
Authors: Carvalho Danniel Da Silva 
Published: July 2016

O objetivo deste trabalho é discutir o comportamento da 1ª pessoa do singular no português a partir de dados de primeira pessoa do singular não marcada no português brasileiro (PB) encontradas em dados do português afro-brasileiro coletados na comunidade de Helvécia, Bahia e Muquém, Alagoas. O trabalho parte da análise de Brito e Carvalho (2014), que relacionam a estrutura de pro ao mecanismo de licenciamento que torna possível que, ainda que a morfologia de primeira pessoa do singular não esteja presente na flexão verbal, esta seja a referência recuperada por pro, uma vez que, segundo Rizzi (1986), pro deve ser identificado e, para tanto, herda os traços phi do licenciador. Esta análise é, então, reinterpretada a partir da noção de relativização de traços, proposta inicialmente por Preminger (2014), assumindo-se um mecanismo de concordância também relativizado.
Análise do clima organizacional: um estudo multicaso em empresas do Estado do Paraná
Authors: Bernardino Jean Francisco , Silva Helena Helena de Fátima Nunes , Queiroz Fernanda Cristina Barbosa Pereira 
Published: July 2016

A compreensão do clima organizacional pode auxiliar na gestão das estratégias que orientam as intervenções e mudanças necessárias ao crescimento e desenvolvimento das organizações. Este artigo tem como objetivo analisar as informações a respeito do clima organizacional de três empresas paranaenses, de diferentes ramos de atividades, denominadas A, B e C. A Empresa A fornece serviços e tecnologias para uma instituição bancária, a Empresa B realiza serviços essenciais em um município, como limpeza pública e a Empresa C atua na área de transporte de grãos. Para a coleta de dados utilizou-se um questionário estruturado, contendo 22 questões objetivas, abrangendo as seguintes variáveis: avaliação da supervisão, avaliação do salário, avaliação do desenvolvimento profissional, avaliação do feedback e avaliação do trabalho em si (nível de estresse dos funcionários). Os resultados encontrados indicam que as Empresas A e B estão dentro do padrão de clima organizacional considerado regular e a Empresa C pode ser enquadrada como um clima ruim. Conclui-se que há similaridade entre as empresas em alguns quesitos, que estão relacionados ao negócio, estrutura e estratégia organizacional.
Grief Interrupted: Writing My Father’s Life
Authors: Couser G. Thomas 
Published: July 2016

In the fall of 1974, my mother died of ovarian cancer at the age of 65; about eight months later, my father succumbed to depression at 69. The job of cleaning out the house in which I had grown up fell to me. My labors were rewarded by the discovery of a trove of personal documents—mostly personal letters— in my father’s closet. At the time, too traumatized to engage with them, I skimmed, sorted, boxed, and stored them. It took me more than thirty years to open that box and absorb its contents. My rediscovery of this archive significantly affected my relation to the field of life writing, to which I had devoted my academic career. It greatly enhanced my appreciation of correspondence: I finally “get” letters. And the rich material impelled me to compose a memoir of my father. Doing so made me face ethical issues from a novel perspective. Moreover, writing my father’s story has helped me understand how a traumatic sequence of events when I was 28 has directed and shaped my academic work from the beginning. This article was submitted to the European Journal of Life Writing on August 29th 2015 and published on June 22nd 2016.
Reducing Stress in Youth: A Pilot-Study on the Effects of a University-Based Intervention Program for University Students in Pune, India
Authors: De Wit Emma Emily , Adithy - , Bunders-Aelen Joske G. F. , Regeer Barbara J. 
Published: July 2016

<p>Mental health problems among youth have become important public health concern for many low &amp; middle- income countries. As part of a research program to improve mental wellbeing in Pune, India, a university-based intervention was developed for students of two educational institutes. In one month, 33 students (age 18-22) participated in a series of 2-hour sessions in which they were stimulated to learn better coping skills to deal with stress and anxiety. The interactive sessions were facilitated by a psychologist and volunteers of a suicide prevention NGO. Rational Emotive Behaviour Therapy (REBT) approaches were used to help students identify stressors and find alternative thought patterns towards the stressor. Playful exercises, such as theatre, dance and poetry, were used to develop self-esteem, self-expression and a better sense of control in students. Throughout the program, relaxation methods, such as Emotional Freedom Technique (EFT), were practiced to help reduce stress in students. To study the impact of the intervention, data were collected, before- and after the intervention and in an eight month follow-up with the Perceived Stress Scale (PSS), in combination with open questionnaires and field notes. Preliminary results show a significant decrease in average stress scores in students after the program in comparison to before the intervention (p-value is 0.044 &lt; 0.05). Students reflect upon the program as helpful and specifically emphasize the role of poetry, dance &amp; EFT as main contributors. In follow-up tests perceived stress scores remained lower than at base-line, although not significant. Booster sessions are suggested to sustain the benefits. Overall, the results of this pilot study show that low threshold, university-based interventions, could be useful in stimulating psychosocial well-being in youth.</p><p> </p>