Time filter

Source Type

Xavier M.D.,Nadir Dias de Figueiredo | Xavier M.D.,Centro Estadual Of Educacao Tecnologica Paula Souza | de Lima N.B.,Brazilian Nuclear Energy Research Institute (IPEN) | Plaut R.L.,University of Sao Paulo | Schon C.G.,University of Sao Paulo
International Journal of Advanced Manufacturing Technology | Year: 2015

This work aims at studying the influence of the strain path upon the FLC0 formability parameter, the root of the forming limit curves (FLC). The investigation was conducted in an interstitial free (IF) quality steel. The FLC0 parameter was evaluated in an intrinsic tensile test in near plane strain (NPS) condition, but following two strain paths. The first one being a uniaxial (proportional) path up to initial necking. The second (non-proportional) path corresponded to applying 15 % nominal plastic strain in one direction (near plane strain) followed by a second deformation applied in the orthogonal direction up to the rupture of the samples. A reduction in the limit strains corresponding to FLC0 in the non-proportional test has been observed. The forming limit stress curves (FLSC) and the critical values FLSD0 are also related to these trajectories. A simulation using finite element method (FEM) has been applied to analyze the evolution of stress and strain during the two paths, and the results have been found consistent for both proportional and non-proportional paths. Texture and surface roughness evolution of the sheet were also measured and related to the applied strain paths. © 2015, Springer-Verlag London.


Pereira I.L.,Municipal University of São Caetano do Sul | Pereira I.L.,Centro Estadual Of Educacao Tecnologica Paula Souza | Crispim S.F.,Municipal University of São Caetano do Sul | Crispim S.F.,University of Sao Paulo
Gestao e Producao | Year: 2015

One of the main purposes of Administration is the systematization of best practices that support the achievement of organizational objectives, mainly shareholder value in the case of for-profit companies. The aim of this study was to determine to what extent the factors identified as explanatory for achieving success in American companies were also present in Brazilian companies with similar value performance. This is a descriptive study based on field survey design. A 24-year (1988-2012) data survey of market value of all Brazilian private equity companies listed on the BM&F BOVESPA identified seven companies that met the performance parameters established in the research. Executives, or former executives, from these companies collaborated with this study, answering questions about the seven explanatory success factors identified in the research Good to Great, Collins. The adherence - or degree of alignment - observed for each factor is as follows: continuous improvement (90%); attitude toward problems (86%); strategic focus (86%); discipline (86%); leadership (82%); team (80%) and relationship with technology (78%). We conclude that, in general, the factors identified as explanatory for the high performance of American companies also significantly explain the success of Brazilian companies. This research contributes to endorse market value as a performance indicator for long-term analysis of Brazilian companies; identify Brazilian listed companies with sustained high performance; improve the understanding of strategic competitiveness factors of high performance Brazilian companies; identify possible ways to improve the performance of companies; and identify opportunities for future studies on the value of companies, competitiveness and explanatory factors.


Neto M.D.B.,Brazilian Technological Institute of Aeronautics | Sales R.D.C.M.,Brazilian Technological Institute of Aeronautics | Sales R.D.C.M.,Centro Estadual Of Educacao Tecnologica Paula Souza | Koshun I.,Brazilian Technological Institute of Aeronautics | Rocco J.A.F.F.,Brazilian Technological Institute of Aeronautics
Journal of Aerospace Technology and Management | Year: 2016

This paper describes the polycarbonate acrylic laminated development that can be applied in aeronautics and aerospace transparencies. The case studied is a laminated double-curved transparency (bubble form) used in an observation side window of a military aircraft. Side windows need strength and specific characteristics, similar to windshields, allowing the perfect visualization and image capture. Laminated transparencies composed by different materials have better qualities than the monolithic ones. This kind of transparency can offer high mechanical and chemical resistance, high transparency, no fragmentation and easy maintenance or recovery. A significant amount of information about materials and processes was jointed in order to build the reinforced transparency and validate this study. The final results were analyzed based on two points of view: mechanic resistance and, especially, optical quality. © 2016. Journal of Aerospace Technology and Management. all right reserved.


de Medeiros G.A.,Paulista University | Daniel L.A.,Centro Estadual Of Educacao Tecnologica Paula Souza | de Lucarelli J.R.F.,University of Campinas | Espindola C.R.,Centro Estadual Of Educacao Tecnologica Paula Souza | And 3 more authors.
WIT Transactions on Ecology and the Environment | Year: 2012

In Brazil the intensive agriculture use, mainly pasture, is the main cause of the presence of extensive areas of degraded lands. This study aimed to assess the impact of different soil management practices in a pasture degraded area used as garbage disposal. The experiment was performed at the Faculdade de Engenharia Agrícola, Universidade Estadual de Campinas - UNICAMP, in Campinas, state of São Paulo, Brazil, from 1990 to 1996. This area has undergone a process of recovery through removal of trash deposited on the surface, in 1985, levelling of soil, followed by application of limestone, subsoiling, planting of legumes (Crotalaria juncea) and crop rotation (soybean and maize). Since 1990 only popcorn maize was grown and established plots managed with different soil tillage systems, including harrow, chisel plow, moldboard plow, no tillage, disk plow and revolving hoe. One plot was planted exclusively with guinea grass (Panicum maximum) to serve as a reference for minimum loss of soil and another grown on a downhill direction to correspond to the expected maximum erosion. There were differences in sediment loss, nutrient loss and productivity of the popcorn maize in the period analyzed. The chisel plow and no tillage treatments caused the slightest loss of soil and nutrients, compared to other tillage systems. The results show that the soil management systems influenced the physical and chemical characteristics of soil, allowing an economical and environmental recovery of the area, providing the conditions for grain agricultural production. © 2012 WIT Press.


de Lima T.D.D.,Centro Estadual Of Educacao Tecnologica Paula Souza | Gil A.S.B.,Museu Paraense Emilio Goeldi MPEG | Trevisan R.,Federal University of Santa Catarina
Phytotaxa | Year: 2014

Eleocharis pseudobulbosa, a new species of Cyperaceae from Southern Brazil (Capão Bonito, São Paulo), is here described based on external morphological studies. This species is characterized by the presence of conspicuous stolons with straw-colored scales, forming a bulb-like structure in the growing points of the new culms; circular to oval culms in cross section; spikelets with small number of flowers [10-25(-30)]; achene small (0.6 mm long) and slightly reticulate; and stylopodium as wide as the achene. A detailed illustration and a diagnostic comparison with close morphological related species are presented. © 2014 Magnolia Press.


De Fabricio R.S.,Centro Estadual Of Educacao Tecnologica Paula Souza | Da Silva F.R.,Centro Estadual Of Educacao Tecnologica Paula Souza | Simoes E.,Centro Estadual Of Educacao Tecnologica Paula Souza | Galegale N.V.,Centro Estadual Of Educacao Tecnologica Paula Souza | Akabane G.K.,Centro Estadual Of Educacao Tecnologica Paula Souza
IFAC-PapersOnLine | Year: 2015

The R&D center of a Chinese multinational subsidized in Brazil has been making open innovation a synonym for its strategy based on partnerships with other companies, universities, and research institutes in Brazil. Still thinking how to strengthen its open innovation model the company seeks for new forms of partnerships to create an ecosystem for generating disruptive innovation. The R&D center can be a bridge to attract startups companies and develop a business model that can generate disruptive innovations for the multinational products. This paper studies how this open innovation strategy can benefit from a partnership with startup. © 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.


Simoes D.,Centro Estadual Of Educacao Tecnologica Paula Souza | Cabral A.C.,Centro Estadual Of Educacao Tecnologica Paula Souza | De Oliveira P.A.,Centro Estadual Of Educacao Tecnologica Paula Souza
Revista Brasileira de Fruticultura | Year: 2015

The citriculture consists in several environmental risks, as weather changes and pests, and also consists in considerable financial risk, mainly due to the period of return on the initial investment. This study was motivated by the need to assess the risks of a business activity such as citriculture. Our objective was to build a stochastic simulation model to achieve the economic and financial analysis of an orange producer in the Midwest region of the state of Sao Paulo, under conditions of uncertainty. The parameters used were the Net Present Value (NPV), the Modified Internal Rate of Return (MIRR), and the Discounted Payback. To evaluate the risk conditions we built a probabilistic model of pseudorandom numbers generated with Monte Carlo method. The results showed that the activity analyzed provides a risk of 42.8% to reach a NPV negative; however, the yield assessed by MIRR was 7.7%, higher than the yield from the reapplication of the positive cash flows. The financial investment pays itself after the fourteenth year of activity. © 2015, Sociedade Brasileira de Fruticultura. All rights reserved.


de Andrade L.R.,Federal University of Goais | Sandin Brito A.,São Paulo State Technological College | de Souza Melero A.M.G.,São Paulo State Technological College | Zanin H.,University of Campinas | And 5 more authors.
Ecotoxicology and Environmental Safety | Year: 2014

In order to assess the safety of the carbon nanotubes to human health and the environment, we investigated the potential toxicity and ability of multi-walled carbon nanotubes (NT), to induce DNA damage by employing the Allium cepa genotoxicity/mutagenicity test and the Somatic Mutation and Recombination Test (SMART) in the fruitfly, Drosophila melanogaster. The results demonstrated that NT did not significantly induce genotoxic or mutagenic effects in the Allium cepa test. All concentrations evaluated in the SMART assay showed survival rates higher than 90percent, indicating the absence of chronic toxicity for NT. Furthermore, the various treatments showed no significant increase in the NT mutation and recombination frequencies in mwh/flr3 genotype compared to respective negative controls, demonstrating the absence of DNA damage caused by NT. © 2013 Elsevier Inc.


Simoes D.,Centro Estadual Of Educacao Tecnologica Paula Souza | Gouvea A.C.F.,Centro Estadual Of Educacao Tecnologica Paula Souza
Archivos de Zootecnia | Year: 2015

The scenario simulation by Monte Carlo method provides the manager of the enterprise consistent decision making from random samples of the input variables which involves the ability to minimize errors that may occur with the implementation or administration on an investment project. To understand the variables that implicate the economy and the incorporation of danger the project for the cultivation of Nile tilapia in net-tanks installed in the Midwestern region of the state of São Paulo – Brazil, conducted the simulation by Monte Carlo method. The estimated results confrm that the investment project for the cultivation Nile tilapia in 10 net-tanks, with expected sales price of US$ 1.70 per kilogram and 14500 kg cultivated for the production cycle, results in indicators economically viable proftability. © 2015, Universidad de Cordoba. All Rights Reserved.


Arnold F.J.,University of Campinas | Battilana R.B.,Centro Estadual Of Educacao Tecnologica Paula Souza | Aranda M.C.,Centro Estadual Of Educacao Tecnologica Paula Souza
Physics Procedia | Year: 2015

The performance of piezoelectric transducers is affected by variation of the acoustic loads. Correction of the excitation frequency are needed to maintain the performance. This paper presents an algorithm for dynamic correction of the operating frequency based on adaptive systems able to correct the frequency applying artificial intelligence techniques to a survey of impedance profiles. When the impedance is changed, a searching of similar values is performed in previously stored files and an iterative process finds the final frequency closer to the original impedance for the required performance. Simulations has been carried out using electric models. The results show the system is robust and the average response time is 6 ms. © 2015 The Authors.

Loading Centro Estadual Of Educacao Tecnologica Paula Souza collaborators
Loading Centro Estadual Of Educacao Tecnologica Paula Souza collaborators