Methodist University of Piracicaba
Piracicaba, Brazil
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Paraiba J.D.,Methodist University of Piracicaba | Martins L.E.G.,Federal University of São Paulo
International Journal of Uncertainty, Fuzziness and Knowlege-Based Systems | Year: 2017

Self-Adaptive Systems are able to change their behavior at runtime according to the environment where they are. This study presents an approach to specify the requirements for self-adaptive systems based on the concepts of Fuzzy Logic, which deals with factors such as ambiguity, uncertainties and vague information on the solution of problems; and NFR-Framework, which deals with the non-functional requirements which, very often, vaguely and full of uncertainties present themselves. Adaptive systems consist of (functional and non-functional) requirements, which hold the capacity to modify themselves during the runtime with little or no human intervention at all. Requirements that carry out the feature of wide variability are called adaptive requirements. PERSA (acronym from "Processo de Especificação de Requisitos Adaptativos", in Portuguese) is reported in this work, using the Fuzzy Logic and the NFR-Framework as a basis, since both offers resources to manage uncertainties, an inherent attribute of self-adaptive systems. This process aims the approach of specification of adaptive requirements in a systematic way providing a guide to support requirements engineers. PERSA Process is settled in three mains phases subdivided into several steps. Two case studies were developed to validate it: the first deals with an automated system to prepare steaks, which needs to adapt to its several types; the second relates to a system for automation for canine diets, which must be adapted to different breeds of dogs according to their size, weight and classification. The case studies provide a first approach of the use and benefits of PERSA Process. In these studied the theoretical proposal was evaluated and discussed in order to establish the degree of understanding, the clarity of activities and the necessary adjustments to improve the proposed achievements, thus obtaining a satisfactory though early assessment which answers the purpose of specifying the requirements for self-adaptive systems. © 2017 World Scientific Publishing Company.

Alburquerque-Sendin F.,University of Salamanca | Camargo P.R.,Federal University of São Carlos | Camargo P.R.,Methodist University of Piracicaba | Vieira A.,Federal University of São Carlos | Salvini T.F.,Federal University of São Carlos
Clinical Journal of Pain | Year: 2013

Objectives: To identify the presence of myofascial trigger points (TrPs) and pressure pain threshold (PPT) levels in the shoulder muscles of both involved and uninvolved sides in patients with unilateral shoulder impingement syndrome (SIS). Methods: Twenty-seven patients with SIS and 20 matched control patients participated in this study. TrPs of 10 shoulder muscles and 8 PPTs, including tibialis anterior PPT, were assessed. Results: SIS group showed a greater number of TrPs (t=-2.697; P=0.010) than the control group. The muscles of the uninvolved side of the SIS group also presented some active TrPs. PPTs showed small differences between involved and uninvolved sides of patients with SIS and higher differences between both sides of the SIS group and dominant side of controls although with significant difference only in the supraspinatus PPT (F=3.239; P=0.045). The muscle PPTs of the patients presenting TrPs in each muscle of the involved side were lower than the PPTs of the patients without TrPs in the same muscle for both involved and uninvolved sides with few significant differences. Discussion: The high number of TrPs in the involved side of patients with SIS suggests the presence of peripheral sensitization. The results reject the presence of central alterations. Finally, the patients with unilateral SIS may present bilateral deficits related to myofascial pain. © 2013 by Lippincott Williams & Wilkins.

Schutzer K.,Methodist University of Piracicaba | Stroh C.,Satisloh GmbH | Schulz H.,University of Management and Technology
CIRP Annals - Manufacturing Technology | Year: 2010

The usage of B-Spline toolpath for the machining of freeform surfaces offers advantages compared to linear interpolated toolpaths, since the continuous and continuous derivable splines allow the machine tool to move with higher speeds. Common CAM systems can calculate spline interpolated toolpath using triangulations, that discretisise spline data models of the workpieces. This paper presents new methods based on the C-Space approach. Cutter location surfaces in B-Spline description are generated and toolpaths are calculated by projecting guide curves onto these surfaces. All hereby used algorithms utilise the B-Spline description without any discretisation. © 2010 CIRP.

Nascimben Matheus C.,Methodist University of Piracicaba | Caldeira De Oliveira Guirro E.,University of Sao Paulo
Breast Cancer Research and Treatment | Year: 2011

The aim of this study was to evaluate the arterial and venous blood flow in women who underwent upper limb axillary dissection surgery for the treatment of breast cancer. Sixty women were divided into two groups: group 1 (G1)-30 women who underwent breast surgery with axillary dissection level II or III (55.6 ± 8.6 years); group 2 (G2)-control, 30 women with no breast cancer (57.4 ± 7.0 years). Blood flow profile was evaluated by a continuous wave ultrasound Doppler device (Nicolet Vascular Versalab SE ®) with an 8 MHz probe. Axillary, brachial arteries and veins, arm circumference, volumes, and the ankle-brachial index (ABI) were examined. Wilcoxon test and Mann-Whitney tests were applied to analyze blood flow velocity intra-group and between G1 and G2, respectively. The G1 results showed no lymphedema and no peripheral arterial disease (ABI > 0.9). Moreover, the mean blood flow velocity of the vessels ipsilateral to the surgery was significantly higher than the contralateral ones for all vessels examined (P < 0.05). The mean velocity of blood flow of the vessels contralateral to surgery was significantly higher than the axillary artery in G2 (P < 0.05). It can be concluded that women who underwent axillary dissection due to breast cancer showed probable stenosis in the arterial and venous axillary and brachial vessels of the upper limb ipsilateral to the surgery, confirmed by the increase of blood flow velocity, and such obstruction might affect the limb contralateral to the operation site. © 2011 Springer Science+Business Media, LLC.

Cardoso G.A.,University of Sao Paulo | Salgado J.M.,University of Sao Paulo | Cesar M.D.C.,Methodist University of Piracicaba | Donado-Pestana C.M.,University of Sao Paulo
Journal of Medicinal Food | Year: 2013

Green tea has been shown to have thermogenic and antiobesity properties. Therefore, it is important to investigate its effect on weight loss in humans, especially in women. We investigated the effects of green tea consumption combined with resistance training on the body composition and the resting metabolic rate (RMR) in women who were overweight or obese (grade I). After 4 weeks on an adaptive diet, 36 women were divided into four groups (group 1 green tea; group 2 placebo; group 3 green tea plus resistance training; group 4 placebo plus resistance training). The study was double-blinded and placebo-controlled. The RMR and body composition were ascertained for each volunteer, blood tests were performed, and subjects in groups 3 and 4 were tested for their one repetition maximum. Each subject followed the protocol and continued the diet for eight additional weeks, and periodic evaluations were administered. The mean RMR of group 1 decreased significantly and was accompanied by weight loss, maintenance of lean body mass, and decreases in both waist circumference and body mass index. Group 2 showed no variations in anthropometric or blood variables and significantly decreased their mean RMR. Group 3 showed significant increases in RMR, lean body mass, and muscle strength, and significant decreases in body fat, triglycerides, and waist circumference as compared to group 4. Green tea combined with resistance training its potential is increased with decreasing body fat, waist circumference, and triacylglyceride levels and by increasing lean body mass and muscle strength. © Copyright 2012, Mary Ann Liebert, Inc. and Korean Society of Food Science and Nutrition 2012.

Jabbour C.J.C.,São Paulo State University | Maria Da Silva E.,Methodist University of Piracicaba | Paiva E.L.,Fundacao Getulio Vargas FGV in Sao Paulo | Almada Santos F.C.,University of Sao Paulo
Journal of Cleaner Production | Year: 2012

Current studies indicate a need to integrate environmental management with manufacturing strategy, including topics like cross-functional integration, environmental impact, and waste reduction. Nevertheless, such studies are relatively rare, existing still a need for research in specific regional contexts. At the same time, the results found are not unanimous. Due to these gaps, the objective of this article is to analyze if environmental management can be considered a new competitive priority for manufacturing enterprises located in Brazil. A cross-sectional survey was conducted with Brazilian companies certified by ISO 14001. Sixty-five valid questionnaires were analyzed through Structural Equation Modelling (SEM). The first conclusion is that environmental management presents a preventive approach in the sample analyzed, focused on eco-efficiency, what potentially do not to create a competitive advantage. This preventive approach inhibits environmental management from being regarded as a new competitive manufacturing priority, in the full sense as defined by the literature. Another important result is that environmental management, although following a preventive focus, may influence positively the four manufacturing priorities: cost, quality, flexibility and delivery. © 2011 Elsevier Ltd. All rights reserved.

Lima C.R.C.,Methodist University of Piracicaba | Cinca N.,University of Barcelona | Guilemany J.M.,University of Barcelona
Ceramics International | Year: 2012

The performance of an intermediate Cr 3C 2 ceramic layer applied by PVD between the bond coat and the ceramic top coat in a TBC system was evaluated. The thickness of the transitional layer was kept around 1-2 μm. Two substrate materials and two distinct bond coats were combined in the tests. High Velocity Oxygen Fuel (HVOF) and Atmospheric Plasma Spraying (APS) were used respectively for bond coat and top coat deposition. Isothermal oxidation tests were performed at 1000 °C in static air atmosphere. Thermal grown oxide (TGO) was measured and correlated to the exposition times. Results are discussed in terms of the TGO growth rate and changes in residual stresses. The results suggest an improvement in the oxidation resistance of the bond coat because of the presence of the intermediate layer. © 2012 Elsevier Ltd and Techna Group S.r.l.

Miranda E.F.,Nove de Julho University | Leal-Junior E.C.P.,Nove de Julho University | Marchetti P.H.,Methodist University of Piracicaba | Dal Corso S.,Nove de Julho University
Lasers in Medical Science | Year: 2014

Patients with chronic obstructive pulmonary disease (COPD) are susceptible to early muscle fatigue. Light-emitting diodes therapy (LEDT) has been used to minimize muscle fatigue in athletes and healthy subjects. The aim of this study is to investigate the acute effects of LEDT on muscle fatigue and perception of effort in patients with COPD during isometric endurance test of the quadriceps femoris (QF). Ten patients (VEF1 50 ± 13 % of predicted) underwent a single LEDT and sham application, 48 h apart, in a randomized crossover design. The LEDT and sham were applied in three localized areas of the QF (rectus femoris, vastus lateralis, and vastus medialis). Before and after exposure to LEDT and sham, the patients performed an isometric endurance test (60 % of the maximum voluntary isometric contraction), until the limit of tolerance concomitant to surface electromyography recording (median frequency as mean outcome). The slope obtained from linear regression analysis of the median frequency (MF) over endurance time was also used as an endurance index. Endurance time increased significantly after exposure to LEDT (from 26 ± 2 to 53 ± 5 s) as compared to sham (from 23 ± 3 to 30 ± 4 s) (F = 64, P = 0.0001). A greater decline in MF was observed during isometric endurance test after sham, compared to LEDT (F = 14.6, P = 0.004). The slope of the MF over time was lower post-LEDT compared to post-sham (-0.7 ± 0.3 vs. -1.5 ± 0.8; P = 0.004). The dyspnea score corrected for endurance time was lower post-LEDT (P = 0.008) but similar for fatigue both post-LEDT and post-sham. A single application of LEDT minimizes muscle fatigue and increases isometric endurance time. © 2013 Springer-Verlag London.

Monaro R.L.G.,Methodist University of Piracicaba | Helleno A.L.,Methodist University of Piracicaba | Schutzer K.,Methodist University of Piracicaba
Procedia CIRP | Year: 2013

The production sector of molds and dies is under a continuous pressure for process optimization due the high lead time required for the production of complex tools. In recent years, to improve this sector, numerous studies have been aimed at optimization of the CAD/CAM/CNC chain. However, despite recent technological innovations such as development of cutting tools, machine tools, and process simulation systems, the machining step still represents a major bottleneck in this process. The current generation of Numerical Control (NC) programs that represents the tool path do not consider the dynamic characteristics of the machine tool in the decision-making process to choose the most appropriate cutting strategies, resulting in NC programs that do not reach levels of excellence. The main objective of this paper is to present the development of a reference index based on the dynamic characteristics of the Machine Tool to support the NC programming with a commercial CAM system. This index considers the Machine Response Time (MRT) of NC controller, the acceleration and deceleration on the axes of the machine tool and the tool path segment (size and inclination). The index makes possible an experimental evaluation of relationships between the programmed feed rate for the tool path and dynamic performance due to movements of the machine axes, thus becoming an important decision-making factor in choosing the best machining strategy and consequently a better plan of the production process in die and mold industries. © 2013 The Authors.

Libardi C.A.,University of Campinas | De Souza G.V.,University of Campinas | Cavaglieri C.R.,Methodist University of Piracicaba | Madruga V.A.,University of Campinas | Chacon-Mikahil M.P.T.,University of Campinas
Medicine and Science in Sports and Exercise | Year: 2012

PURPOSE: The aim of the present study was to evaluate the effects of 16 wk of resistance training (RT), endurance training (ET), and concurrent training (CT) on inflammatory markers, C-reactive protein (CRP), and functional capacity in sedentary middle-age men. METHODS: Healthy subjects were randomized into RT (n = 11), ET (n = 12), CT (n = 11), and a control group (n = 13). The subjects performed three weekly sessions lasting about 60 min for 16 wk. Maximal strength was tested in bench press and leg press. The peak oxygen uptake (V̇O2peak) was measured in an incremental exercise test. Plasma tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and CRP levels were determined by an enzyme-linked immunosorbent assay. RESULTS: Maximal strength was increased after 16 wk, with no differences between RT and CT. V̇O2peak increased in ET and CT comparing before and after training. There were no significant differences in TNF-α, IL-6, and CRP comparing before and after training. CONCLUSIONS: Sixteen weeks of RT, ET, or CT in middle-age healthy men has not affected low and moderate IL-6, TNF-α, and CRP levels. CT performed in the same weekly frequency and session duration of ET and RT was effective in increasing both maximal strength and V̇O2peak, in addition to improvements in lipid profile.

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