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Influence of shock absorber condition on pavement fatigue using relative damage concept

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Journal of Traffic and Transportation Engineering(English Edition) 2015年第6期2卷 406-413页

作者： Pablo Kubo cassio Paiva Adelino Ferreira Arthur Larocca Department of Civil Engineering State University of Campinas Department of Civil Engineering University of Coimbra Department of Engineering Alpha Servicos de Assessoria Tecnica Ltda

Considering the importance of the road transportation nowadays, concerns related to pavement deterioration and maintenance have become relevant subjects. Especially for commercial vehicles, the vertical dynamic load （characterized by the tire-road interaction） is directly related to wear on the road surface. Given this, the main objective of this paper is to analyse effects of vertical loads applied on the flexible pavement, considering the variation of the condition of shock absorbers from a truck＇s front suspension. The mea- surements were performed on a rigid truck, with 2 steering front axles, in a durability test track located in Brazil. With a constant load of 6 tons on the front suspension （the maximum allowed load on front axles according to Brazilian legislation）, 3 different shock absorber conditions were evaluated： new, used and failed. By applying the relative damage concept, it is possible to conclude that the variation of the shock absorber conditions will significantly affect the vertical load applied on the pavement. Although the results clearly point to a dependent relationship between the load and the condition of the shock ab- sorbers, it is recommended to repeat the same methodology, in future to analyse the influence of other quarter car model variants （such as spring rate, mass and tire spring stiffness）.

关键词： Vertical load Pavement Relative damage Shock absorber

Numerical Solution of the Upper-Convected Maxwell Model for Three-Dimensional Free Surface Flows

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Communications in Computational Physics 2009年第7期6卷 367-395页

作者： Murilo F.Tome Renato A.P.Silva cassio M.Oishi Sean McKee Departamento de Matematica Aplicada e Estatıstica Instituto de Ciencias Matematicas e de Computa¸caoUniversidade de Sao PauloSao CarlosBrazil Department of Mathematics University of StrathclydeGlasgowUK

This work presents a finite difference technique for simulating three-dimensional free surface flows governed by the Upper-Convected Maxwell(UCM)constitutive equation.A Marker-and-Cell approach is employed to represent the fluid free surface and formulations for calculating the non-Newtonian stress tensor on solid boundaries are *** complete free surface stress conditions are *** momentum equation is solved by an implicit technique while the UCM constitutive equation is integrated by the explicit Euler *** resulting equations are solved by the finite difference method on a 3D-staggered *** using an exact solution for fully developed flow inside a pipe,validation and convergence results are *** results include the simulation of the transient extrudate swell and the comparison between jet buckling of UCM and Newtonian fluids.

关键词： Viscoelastic flow Upper-Convected Maxwell finite difference free surface implicit techniques Marker-and-Cell

Acute Effects of Stretching on Flexibility and Performance:A Narrative Review

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Journal of Science in Sport and Exercise 2019年第1期1卷 29-37页

作者： Camila D.Lima cassio V.Ruas David G.Behm Lee E.Brown School of Human Kinetics and Recreation Memorial University of NewfoundlandSt.John’sCanada Centre for Exercise and Sports Science Research(CESSR) School of Medical and Health SciencesEdith Cowan UniversityJoondalupAustralia Department of Kinesiology California State UniversityFullerton7178 Loysburg StreetNavarreFL 32566USA

Passive and active stretching techniques have been shown to increase both chronic and acute range of motion(ROM).Acute ROM improvements can be countered by decreases in muscle performance,primarily after prolonged static stretching(SS)and proprioceptive neuromuscular facilitation(PNF)techniques when not incorporated into a full warm up *** contrast,ballistic stretching and dynamic stretching techniques typically induce either an increase or no change in muscular force and *** review explores studies that have investigated stretching responses on ROM,muscle functionality and ***,the literature demonstrates that prolonged acute SS and PNF stretching can elicit the greatest changes in flexibility,but without additional dynamic activities(*** warm up)can induce neuromuscular force and power output impairments,while increasing ROM and some sports specific *** response to stretching may be determined by the manipulation of confounding variables such as duration,population,volume,test specificity and *** increased dosage of some of these variables during stretching in isolation,augments ROM increases while attenuating muscle force output,except for stretching intensity which may lead to similar *** with high flexibility may have positive effects from stretching when tested on their sport specific performance,while general population may suffer greater negative *** control-ling these variables during stretching protocols may lead to misleading information regarding its effects on muscle performance.

关键词： Passive stretching Active stretching Range of motion Performance

Parametric Analysis of the Stability of Degraded Railroad Platforms

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Journal of Civil Engineering and Architecture 2014年第1期8卷 11-18页

作者： Paulo Roberto Aguiar cassio Eduardo Lima de Paiva Geotechnical and Transportation Department Civil Engineering School Campinas University (UN1CAMP) Campinas 13000-000Brazil

The current study is developed based on one of the types of subgrade rupture risk suggested by Selig and Waters （1994）. It aims to evaluate subgrade stability railroad, which consists of the slope stability analysis of a railway yard embankment subjected to a wagon load type gondola parked on this track. This proposed analysis was taken into consideration because there are Brazilian railroads in high deterioration level. In some of these lines the tracks are submitted to increasing amount of load every year. The adopted model slope stability to the studied railroad embankments considers the rupture on circular line. It was applied the Geoslope-Slope/W software, version 6, to the evaluation of the platform-slope system. Several situations are adopted to reach the minimum safety slope, permitting to analyze the platform stability to keep railroad traffic under adequate safety level.

关键词： Rupture circle railway yard track tensions at subgrade degraded railway track.

Parallel Implementation of the BiCGStab（2） Method in GPU Using CUDA and Matlab for Solution of Linear Systems

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通讯和计算机（中英文版） 2014年第4期11卷 339-346页

作者： Lauro cassio Martins de Paula Anderson da Silva Soares Institute of lnformatics Federal University of Goias (UFG) Goias 74001-970 Brazil

This paper presents a parallel implementation of the hybrid BiCGStab(2) (bi-conjugate gradient stabilized) iterative method in a GPU (graphics processing unit) for solution of large and sparse linear systems. This implementation uses the CUDA-Matlab integration, in which the method operations are performed in a GPU core using Matlab built-in functions. The goal is to show that the exploitation of parallelism by using this new technology can provide a significant computational performance. For the validation of the work, we compared the proposed implementation with a BiCGStab(2) sequential and parallelized implementation in the C and CUDA-C languages. The results showed that the proposed implementation is more efficient and can be viable for simulations being carried out with quality and in a timely manner. The gains in computational efficiency were 76x and 6x compared to the implementation in C and CUDA-C, respectively.

关键词： Matlab 并行实现线性系统 GPU 图形处理单元双共轭梯度内置函数计算性能

When is the best surgical time for benign prostate hyperplasia treatment?

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Asian Journal of Andrology 2024年第1期26卷 119-119页

作者： Lucas Mira Gon cassio Riccetto Division of Urology Department of SurgeryUniversity of CampinasUNICAMPCampinas13083888Brazil

Urologists are familiarized with benign prostate hyperplasia(BPH),and lower urinary tract symptoms(LUTS)are in everyday ***,can we improve the assessment to decide which is the best treatment for each patient,or when ... 详细信息

关键词： hyperplasia urinary treatment

Sensitivity Study of Design Parameters of a Railway Route under Vertical Deformations

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Journal of Civil Engineering and Architecture 2014年第5期8卷 663-672页

作者： Luiz Fernando de Melo Correia cassio Eduardo Lima de Paiva Department of Civil Engneering Universidade Estadual de Campinas (UNICAMP) Campinas 13083-970 Brazil

Studying the interaction of components is basic for a railroad project, which is also very important for creating maintenance procedures based on predictions from a model that assumes adequate performance. To determine these interactions, which can have a great number of combinations, the use of a computational model is of vital importance, in this case, the program FERROVIA 1.0 （RAILROAD 1.0） was used. A critical study developed the program FERROVIA 1.0, and its variables were characterized based on values observed in the literature. After initial characterization was carried out, a comparative study was performed on the sensitivity between these variables and the indications of significant behavior for a railway deformed by the known load of a wheel. A statistical program was used to correlate the elements. The intention was to launch the program FERROVIA 1.0 and later use it for 2,187 combinations. The data used in these correlations corresponded to the normal values for the elements used in railroad engineering practice. Our main goal is to understand the behavior of the track vertical deflection according to the variation of the scaling of the various elements of the railway,

关键词： Railway computational model RAILROAD 1.0.

11th International congress on cleft lip and palate and related craniofacial anomalies

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Cleft Palate Surgical Skills Training Using an Alternative Synthetic Bench Model

2009年

作者： Amaral cassio Eduardo Raposo do

Includes bibliographical references and index.

ISBN: (纸本)9788875875176

Includes bibliographical references and index.

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来源：畅想之星图书光盘版（南... 评论

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Chinese Medical Journal 2016年第11期129卷 1382-1383页

作者： Andre Silveira Pinho Cesar Augusto Raposo-Amaral cassio Eduardo Raposo-Amaral Rafael Denadai Institute of Plastic and Craniofacial Surgery SOBRAPAR Hospital Caixa Postal: 6028 Campinas Sao Paulo Brazil

To the Editor： Although there have been numerous reports of difl＇erent synthetic simulators that can provide cleft palate training,none offers a completely ideal model.

关键词：钙调蛋白结合蛋白质类磷蛋白磷酸酶类腭裂