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Modelo de mistura padrão com tempos de vida exponenciais ponderados
(Universidade Federal de São Carlos, 2010-03-05)
Gouveia, Bruno Pauka
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Rodrigues, Josemar
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https://lattes.cnpq.br/4359114733394761
;
https://lattes.cnpq.br/1170163655816572
In this work, we brie_y introduce the concepts of long-term survival analysis. We dedicated ourselves exclusively to the standard mixture cure model from Boag (1949) and Berkson & Gage (1952), showing its deduction and presenting the imunes probability function, which is taken from the model itself and we investigated the identi_ability issues of the mixture model. Motivated by the possibility that a experiment design can lead to a biased sample selection, we studied the weighted probability distributions, more speci_cally the weighted exponential distributions family and its properties. We studied two distributions that belong to this family; namely, the length biased exponential distribution and the beta exponential distribution. Using the GAMLSS package in R, we made some simulation studies intending to evidence the bias that occur when the possibility of a weighted sample is ignored.
Dificuldades para a atualização de versão do sistema ERP R/3 da SAP: estudo de caso em empresa do segmento de bebidas
(Universidade Federal de São Carlos, 2010-03-05)
Valentim, Onivaldo Aparecido
;
Politano, Paulo Rogério
Many companies which adopted ERP systems in the past are frequently reluctant tostart new projects to upgrade the technology to newer versions. The decision is difficult due to thelong time of the project, the amount of financial investments and internal workforcerequired for the job, which are usually similar to the original ERP implementation. This work has asproposal a research and analisys of the apparently large demand of resources necessary to upgradethe versions of ERP R/3 systems. Firstly, a review in literature is made to present the arquitecture, characteristics and concepts of modules and funcionalities of these ERPs systems. It is alsoincluded the study of the life cicle of ERPs systems and its interfaces with legacy systems. Insequence, the versions upgrade subject is explored, where this author suggests that upgrade ofversions gives new life to ERPs systems and discuss how the suppliers share the ERP´s market andfinally explore the kinds of upgrades available for these systems. After these studies, twoquestionnaires are made to obtain data. This research is a Unique Case study type and has asobjective to describe the behavior of critic factors of implementation during an upgrade of ERPsystems, verifying if the demands are justified.
Caracterização e aplicação de zeólitas naturais
(Universidade Federal de São Carlos, 2010-03-05)
Soares, Fernanda Santiago Chaves
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Nogueira, Ana Rita de Araújo
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https://lattes.cnpq.br/7034773971317045
;
https://lattes.cnpq.br/2088822326421565
Zeolites are aluminosilicates with a three dimensional framework structure bearing AlO4 and SiO4 tetrahedra. These are linked to each other by sharing all of the oxygen to form interconnected cages and channels containing mobile water molecules and exchangeable cations. In this work, samples of natural zeolites, originating from mines in different countries, were characterized by physical and chemical methods and then evaluated as an adsorbent material for contaminants commonly found in industrial effluents. The micro devices construction was based on LTCC technology with zeolite inside and using the zeolite as a natural fertilizer support in a fertirrigation experiment employing vinasse in alfafa culture. The characterization experiments showed that the samples Zeolite 1 and Zeolite 2 consist in zeolites of the chinoptilolite type and the composition that the Zeolite 3 in maiming predominated by stilbite zeolite. Adsorption studies indicated the ability of the use of zeolites to metallic ions metal Cd(II), Co(II), Cr(III), Cu(II), K(I), Ni(II), Pb(II) and Zn(II) remotion from aqueous solutions and the possibility to remove of PO4 3- anion pre-concentration. The three evaluated zeolites showed capacity to remove Cr(III) and Pb(II) higher then other studied analytes. Time and pH were evaluated owing their interference in the ions adsorption ability. Miniaturized natural zeolite device inside the LTCC was construed and applied to aqueous ions adsorption presented be versatile in different system s detection. In the fertirrigation experiment was possible to detect the positive influence of the zeolite to increase the alfafa productivity.
Micro-regularidade Gevrey de soluções de sistemas involutivos de edp's não lineares de primeira ordem
(Universidade Federal de São Carlos, 2010-03-05)
Barostichi, Rafael Fernando
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Petronilho, Gerson
;
https://lattes.cnpq.br/5917989984472668
;
https://lattes.cnpq.br/3582461114222090
Let u be a C2 solution for a Gevrey involutive system of _rst order nonlinear partial di_erential equations. In this work, we show that the Gevrey wave front set of order s of u is contained in the characteristic set of the involutive structure generated by the linearized operators associated to the given system. Our approach includes the study of Gevrey approximate solutions, a concept which we believe is of independent interest and could be applied to much more general situations.
Propriedade de Wecken para pontos periódicos
(Universidade Federal de São Carlos, 2010-03-05)
Souza, Rafael Moreira de
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Vendrúscolo, Daniel
;
https://lattes.cnpq.br/8602232587914830
;
https://lattes.cnpq.br/2229252131317138
The objective of this work is to present some procedures for orbits of periodic points class to relate the full Nielsen-Jiang periodic point of a self map of a manifold of dimension greater than three with the cardinality of the set of periodic points of some map homotopic the first application. In this way, the theorem which we want to proof is: Wecken s Theorem for periodic points: For any self map f : X → X of a PL-manifold of dimension greater than tree and a natural number n there exists a map g : X → X homotopic to f such that #FIX(gn) = NFn(f). Great part of results studied has much technical proofs, and so this work requires skill with some classical results of algebraic topology, homotopy theory and theory of fixed points, such as approximations of functions and Hopf-construction . However, there is not needed broad theoretical knowledge. What we mean is that we almost always use same ideas in different ways.
Construção, implementação e avaliação de um programa de alfabetização tecnológica multissensorial para alunos incluídos
(Universidade Federal de São Carlos, 2010-03-05)
Saglia, Isaac Rodrigues
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Denari, Fátima Elisabeth
;
https://lattes.cnpq.br/5575213011914394
;
https://lattes.cnpq.br/9572549180400316
This study aims: to build, implement and evaluate a Multissensorial Technological Literacy Program, built from the essential components of different methods and procedures of literacy, focused on students included in regular class, exploring different sensory modalities, because it unites hearing (phonological awareness), vision (pictograms), taste (flavor and stimuli) and tactile- synesthetic (touch, move), thus enriching their appropriation with computer games. Students who participated in this research are in condition: Intellectual Disabilities, Conduct Disorder, Dyslexia and Dislalia, all includes the final series of the Elementary School, a public school in a medium-sized city in the state of São Paulo. The Program for Technological Literacy Multissensorial was outlined in seven steps: acquisition of vowels, phonemes deaf, phonemes, digraphs, archiphonemes, consonant cluster with /r/ and the consonant group with /l/. The interventions were divided into three sessions a week, remaining for 45 to 60 minutes in a classroom. The data show that there was an average use of participants in relation to pre-test compared to post-test, and was at Stage II: 77% to 97%, Stage III: 64% to 83%, Stage IV: from 22% to 69%; Stage V: 14% to 57%, Stage VI: 63% to 96%, and in Stage VII: 45% to 78%. Based on the results, it is suggested that this study be reapplied with a different population and greater number of participants.
Estudo químico e biológico de micro-organismos endofíticos associados às frutas banana, pêra e goiaba
(Universidade Federal de São Carlos, 2010-03-05)
Medeiros, Lívia Soman de
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Rodrigues Filho, Edson
;
https://lattes.cnpq.br/3667941735597178
;
https://lattes.cnpq.br/7404733691134037
Studies about interaction between microorganisms and plants are focused mainly in the vegetal tissues like roots, steam and leaves. Fruits are a right target for microorganism attacks. Nevertheless, endophytic microorganisms isolated from fruits, seems to be not so explored in chemical point of view. Thus, in this work, it was developed the chemical study about the metabolism referred to endophytic microorganisms from edible fruits, commonly consumed in Brazil: banana, pear, apple and guava fruit. Through HPLC/UV analysis, it were realized and compared, the isolated microorganisms metabolic development, in different media cultures. It was included the media with the proper host fruits. The indolic alkaloid n-acetiltryptamine was isolated from a extract of the bacteria associated to the pear fruit (BP1). From the extracts of guava fruit endophytic fungus, Cladosporium uredinicola (FG1), it were isolated four new depsides in literature: 3-hidroxi-2,5-dimetilfenil 2,4-diidroxi-3,6-dimetilbenzoate (D1), 3-hidroxi-2,4,5-trimetilfenil 2,4-diidroxi-3,6-dimetilbenzoate(D2), 3-hidroxi-2,5- dimetilfenil 3-[(2,4-diidroxi-3,6-dimetilbenzoatoil)oxi]-6-hidroxi-2,4-dimetilbenzoate (D3) e 3-hidroxi-2,4,5-trimetilfenil 3-[(2,4-diidroxi-3,6-dimetilbenzoatoil)oxi]-6- hidroxi-2,4-dimetilbenzoate (D4). The identification of these metabolites was performed according to the respective data from RMN 1 D and 2D, and MS of high and low resolution. It was checked the MIC intervals of D1, D3 and D4 against five tested bacteria. It was realized the bactericide activity of D1 in a concentration of 25μg/mL against Pseudomonas aeruginosa and Bacillus subtilis. It was also verified the photosynthesis inhibitory activity of depsides D1 and D3 produced by the fungus. The fungus C.uredinicola, showed a great depsides production ability. However, this production showed signifcants alterations when fenolic substrates were given to the fungus, in a usual culture media. The estimative of D3 and D4 production curve was also established. The LC-MS/MS technique use, allowed the selective depsides D3 and D4 detection in guava fruit extract, in low concentration ranges.
Ecologia da população de Pachystroma longifolium (Ness). I.M. Johnst. em área fragmentada de um remanescente de mata atlântica
(Universidade Federal de São Carlos, 2010-03-05)
Alcalá, Melina
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Matos, Dalva Maria da Silva
;
https://lattes.cnpq.br/4728734263109138
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https://lattes.cnpq.br/7782163752432829
This study investigated the structure of spatial and ontogenetic stages of the species Pachystroma longifolium (Euphorbiaceae) in semideciduous forest in São Carlos, identifying and describing the post-germinative ontogenetic stages that characterize the development of the species, besides investigate whether the patterns allometric vary within and/or between ontogenetics stages. The spatial pattern was obtained using the aggregation index with the objective to check there are differences in spatial distribution pattern between ontogenetic stages and if these are determined by the preference of niches facilitators or arising from dispersion autochoric. In 1 ha were found 202 individuals and 4 ontogenetic stages were obtained: juvenile, immature, adult vegetative and reproductive adult. No seedlings were found in the plots and senile, which may be related to micro-environmental variation of the area or characteristics of the species. The branching pattern shown followed the Massart's architectural model, which is characteristic of species well adapted to low light conditions. All ontogenetic stages showed significant differences in height and diameter, indicating that they facing different environmental conditions and there is a great way allometric for each stage or group of stages, allowing for the best trade-off between stem diameter and height of plant. The population shows a patchy distribution, and the juveniles were those with the largest index of aggregation. Could not detect an effect of percentage of soil moisture on the distribution and density of individuals. As for the effect of percentage of canopy in the dry and rainy seasons, the correlation was positive and significant for the immature stage and the total of individuals in the area. The clustered pattern found for the population may be related both to autochoric dispersal strategies, as with the characteristics of the species.
Agricultura familiar e gestão de custos: um estudo de caso na região do semi-árido baiano
(Universidade Federal de São Carlos, 2010-03-05)
Alves, Carmen de Almeida
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Beskow, Paulo Roberto
;
https://lattes.cnpq.br/5370208348544496
;
https://lattes.cnpq.br/7161071913937928
This study aimed to learn the accounting controls and strategies for production planning undertaken by the farmers cooperative of Family Agriculture Cooperative of Canudos Uauá and Curaçá - COOPERCUC - situated in the semi-arid environments. The survey also emphasized the importance of participation by gender and the benefits arising from the programs of public policies in the training of family income. This research was based on the science of agroecology that have as a multidisciplinary scientific approach, knowledge and experiences of the farmers themselves. To foster social participation and the perception of farmers on the importance of the use of accounting control rural family in economic planning, we used an alternative methodology playful, constructivist, participatory and reflective collude with the Science of Agroecology. The survey will serve to reflect the family farmer in its importance in the political and economic region and the country, especially its power to influence government decisions and effective public policies for this segment. Taking as a motivational tool string dynamics for the participatory construction of knowledge that has been proven to promote an educational process by considering the cultural knowledge, social environment in the discussion group on economic management within the unit and how this affects the endogenous development site.
Dispositivo óptico para medida em tempo real da birrefringência de polímeros durante a extrusão
(Universidade Federal de São Carlos, 2010-03-05)
Soares, Kinglston
;
Canevarolo Júnior, Sebastião Vicente
;
https://lattes.cnpq.br/4153664441338178
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https://lattes.cnpq.br/7671657131724834
The main objectives of this project were the development and application of an optical device to measure in real time the flow induced birefringence during the polymer extrusion. The linearly polarized light intensity transmitted through the molten polymer flowing in the slit-die is converted into birefringence via its relation with the optical path difference (OPD). The optical device was calibrated on the bench with the use of polycarbonate sheets with known OPD values. In addition, a methodology was developed to deduct the contribution of the strain birefringence of the transparent glass windows of the Rheophotometer. As flow polymers three polystyrene grades were showsen because of their high flow birefringence. The polymer flow temperature and the slit-die inlet pressure were assessed analyzing their effect in the polymer flow birefringence during extrusion. The results show a good relation with the rheological behavior of the polymer. Increasing the melt temperature there is a reduction in the inlet pressure of the slit-die lowering the birefringence flow values due to the increase of the random molecular motions. Both reduce the intensity of secondary forces that could contribute to the orientation. The greater the feeding rate the higher the chain orientation raising the birefringence values. As polymers are pseudoplastic increases in the shear stress leads to chain orientation in the flow direction. At a constant inlet pressure in the slit-die the higher the molecular weight of the polymer the higher the chain orientation producing higher flow birefringence values. These results do show the good quantitative performance of the optical device developed.
Síntese e caracterização de nanocatalisadores de platina suportados aplicados à reação de reforma do metano
(Universidade Federal de São Carlos, 2010-03-05)
Meira, Debora Motta
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Bueno, José Maria Corrêa
;
https://lattes.cnpq.br/0157452280626031
;
https://lattes.cnpq.br/1626800080600447
Colloidal Nanoparticles of Platinum (Pt-NPs) were obtained by reducing hexacloroplatinic acid with ethylene glycol in the presence of polyvinylpyrrolidone (PVP) as protective agent of the particles. Two methods of synthesis were performed which differed by the ratio PVP / Pt used. The synthesis of nanoparticles was accompanied by measures in the UV-visible from of which it was possible to determine the end of the reaction. The Pt-NPs were characterized by Transmission Electron Microscopy (TEM) that determined the average diameter of particles (~ 2.0 nm). After the synthesis, the Pt-NPs were incorporated into the supports of alumina and alumina promoted with cerium and cerium-zirconium which were prepared by sol-gel method. Supporters with nanoparticles incorporated were then subjected to heat treatment have sought the formation of stable catalysts and without the presence of protective polymer, as this could affect the activity of the catalyst by covering the active sites. Through X-ray diffraction and TEM images it was possible to monitor the stability of samples after heat treatment and the samples that were synthesized with higher PVP were more stable. Measures of X-ray absorption fine structure (XAFS) spectroscopy in situ allowed the characterization of the samples in the reaction atmosphere. Through the analysis of extended X-ray absorption fine structure (EXAFS) was observed morphological changes in the particles caused by the increase in temperature showing that there is an increase in the number of atoms of low coordination when samples are heated which favors the reaction of steam reforming of methane. Through studies of X-ray absorption near edge structure (XANES) in the edges L2 and L3 of Pt was possible to monitor how the electron density of the catalysts varies in reaction conditions. Moreover, the catalysts were also tested catalysts. Measures of dispersion were obtained by the reaction of dehydrogenation of cyclohexane and catalysts made of alumina promoted with cerium and cerium-zirconium displayed less dispersion due to the coating caused by the support. The catalysts in which the particles were synthesized with a higher amount of PVP, because of its stability, were subjected to the reaction of steam reforming of methane and proved active. This reaction was used to calculate the value of the apparent activation energy. The catalysts containing promoters were more active than the catalyst only alumina thus showing the role of support in this reaction. Therefore, this system has proved very interesting to study the catalytic properties in reactions sensitive to the structure since the nanoparticles present are monodispersed and the catalyst is stable under reaction conditions allowing the study of structural and electronic properties.
Dinâmica de populações arbóreas em área de cerrado sujeito ao fogo
(Universidade Federal de São Carlos, 2010-03-05)
Leite, Marcelo Boccia
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Matos, Dalva Maria da Silva
;
https://lattes.cnpq.br/4728734263109138
;
https://lattes.cnpq.br/7823877983865382
Fire is a common disturbance in the Brazilian savanna and their action can affect important parameters and, consequently, the rate of population growth. The matrix models are powerful tools for studies of population dynamics, this models provide a projection of the rate of population growth. The aim of this study was to investigate the influence of fire on the population growth rate through the use of matrix models. The study was carried out in the cerrado sensu stricto site in southeastern Brazil. The individuals Anadenanthera falcata, Dalbergia miscolobium and Xylopia aromatica were divided on class size and populations growth rates were found through the model matrix Lefkovitch. There was an increase in the number of seedlings and sprouts between intervals studied. The rates of population growth remained close to 1; the survival of adults was fundamental population growth of X. aromatica. We can conclude that the fire favored vegetative reproduction and sexual differently among species, and that sexual reproduction was more intense in D. miscolobium. The growth rates indicate that the three species are resilient to fire and the vegetative reproduction contributed little to the population growth of X. aromatica, indicating that adult survival is important for the establishment of this species.
Proposta de um modelo quantitativo para análise e melhoria de desempenho do processo de S&OP baseado no diagnóstico e redução de falhas
(Universidade Federal de São Carlos, 2010-03-05)
Pandim, Fabio José
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Pereira, Neocles Alves
;
https://lattes.cnpq.br/3744216524256924
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https://lattes.cnpq.br/1924289075132160
The S&OP process, like any business process of strategic or tactical level, need to have their performance measured so that, through the monitoring of these measurements, we can carry out actions to improve the aspects that are generating an impact on their performance. The models for analysis of performance in the literature does not provide means to find the causes of inefficiency more relevant to the process and did not provide a way to quantify the performance of the process. Thus, this paper will present a proposal for a quantitative model of analysis and improvement of performance for the S&OP process based on the diagnosis and reduction of its most important inefficiencies. To do this, this paper will make a literature search of critical success factors most important to the process, the causes of inefficiencies and suggest possible solutions to reduce or eliminate these causes.
Modelos de sobrevivência na presença de eventos recorrentes e longa duração
(Universidade Federal de São Carlos, 2010-03-05)
Cobre, Juliana
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Louzada Neto, Francisco
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https://lattes.cnpq.br/0994050156415890
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https://lattes.cnpq.br/1042802390444616
In this thesis it is proposed to analyze recurrent event data, recurrent event data with cure fraction and recurrent event data with censoring and competing causes. For the recurrent event data analysis it is proposed a multiple time scale survival model, which includes several particular cases. For recurrent event data with a cure fraction we consider a multiple time scale survival models embedded on a mixture cure fraction modeling. It is also proposed a general model to survival data in presence of competitive causes. In this case, it is assumed that the number of competitive causes follows a generalized negative binomial distribution. While, for the time of occurrence of each cause, a Weibull and a log-logistic distribution were considered. Simulations studies were conducted for every proposed model in order to analyze the asymptotical properties of the estimation procedures. Both, maximum likelihood and Bayesian approaches were considered for parameter estimation. Real data applications demonstrate de use of the proposed models.
Observação versus relato de mães e professoras sobre competência social e comportamentos problemáticos em pré-escolares
(Universidade Federal de São Carlos, 2010-03-08)
Dias, Talita Pereira
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Del Prette, Zilda Aparecida Pereira
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https://lattes.cnpq.br/8113238388739093
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https://lattes.cnpq.br/0097014291170034
The literature has produced evidence that: (a) the early assessment and intervention in social skills can prevent and overcome problematic behaviors; (b) in the case of assessment, there are limits and advantages to different procedures generally used as well as a consensus about the importance of the multimodal design; (c) studies that investigate the relation among data obtained using different procedures, such as observation and informants reports are still scarce, mainly, with preschoolers; (d) analyzes of convergences and divergences between informants reports and between different procedures can produce important information to plan intervention to promote social skills and reduce problem behaviors in the childhood. In this way, the present study had as objectives: (1) To verify similarities and differences in the assessment of social competence with comparisons among four groups of children (with good social skills repertoire - SSB; with internalizing problematic behaviors - IPB, externalizing - EPB e mixed - MPB) in each kind of assessment (mother s report, teacher s report and observation) and comparing the three kinds of assessment to each group; (2) To characterize convergences and divergences between different informants and procedures, with comparisons among groups and intragroups. Based on a sample of 152 children evaluated by Preschool Kindergarten Behaviors Scales (PKBS), 26 children were selected and distributed to each one of the groups. These children participated in five structured situations that were recorded and analyzed by judges previously trained. In the interviews, mothers and teachers reported how the children s performance in each structured situation would have been. The data were analyzed by descriptive and non-parametric inferential statistics. The results indicated that: (1) to each group, the evaluation of social competence by mother s and teacher s reports and by observation were consistent; (2) only the teacher s evaluation differentiated the groups - the children of CHS group presented the best scores of social skills and the CPI group, the worst scores; (3) the convergences between report s data and of observation, in general, were the highest in the CHS group and the lowest in CPI group, except to comparison between mother report and observation, with the most convergence to CPE group. Possible reasons to explain the lowest convergence in the group CPI are highlighted, and methodological, clinical and educational implications are discussed, suggesting plans of intervention based on these results.
Efeitos de um treinamento físico sobre o equilíbrio estático e dinâmico de mulheres idosas residentes na área de abrangência do Programa Saúde da Família de São Carlos
(Universidade Federal de São Carlos, 2010-03-08)
Aveiro, Mariana Chaves
;
Oishi, Jorge
;
https://lattes.cnpq.br/1417328590472858
IBGE estimative for relative Brazilian elderly participation was 9.49% in 2008 and 29.75% in 2050. However, the country has been organized to define public policy to elderly people. Health Family Program has been presented as a strategy to consolidate this policy. Physical therapy participates of this system with a different perspective. It is also performing prevention and health promotion practices. If it‟s known functional mobility and fall risks between among elderly people, could contribute for a health diagnostic that direct decisions related to therapeutic projects in Health Family Unit with the purpose of falls and disability prevention. Despite of it has been established that different training exercise programs could be efficient to prevent falls and disability, it is not known the effects of a low-intensity resistance, balance and coordination program with great adhesion among community-dwelling elderly women. Objectives: The purpose of this study was to assess the mobility and risk for falls in elderly people living in Health Family program area and to analyze the effects of a group-based low intensity exercise training program for mobility, postural control, isometric torque, isokinetic torque, power and time acceleration and quality of life among community-dwelling elderly women. Methods: Initially, elderly from Health Family Program area were evaluated through Mini-Mental State Examination (MMSE) and Timed Up & Go test (TUG) and answered about fall events in the last year. After, elderly women were invited to a group-based low intensity exercise training program for 12 weeks. Women that consent to participate were randomized through sealed envelopes. Training group performed stretching exercises, ankle and knee muscle strengthening and balance training for 12 weeks, two days per week under the supervision of a physiotherapist. Participants in the control group did not undergo any training and were instructed to maintain their usual level of physical activity. 28 community-dwelling elderly women completed the study. They were evaluated through isometric peak torque and isokinetic peak torque, power and time acceleration 60 e 120/s; postural control at stable force platform BERTEC at bipodal stance with eyes opened and closed and unipodal and tandem stance; mobility by Timed Up & Go test; functional balance by Berg Balance Scale; and, quality of life by World Health Organization quality of life questionnaire abbreviated version (WHOQOL-bref). Statistical analyses were performed by ANOVA Kruskal-Wallis, Mann Whitney U, Wilcoxon and Chi-square tests. The level of significance used for all comparisons was 5% (p ≤ 0.05). Results: Participants who had suffered at least one fall in the last year presented the worst value in the TUG when compared to non-fallers (p<0.001). Women prevalence were higher for fallers (p<0.001). No significant association was found between falls and cognitive impairment by MMSE (p=0.11). TUG performance presents significant difference for different elderly age groups (p<0.001). Training group presented a significant improvement to Psychological Domain after 12-week training. Control group presented a significant impairment for General Score and Physical and Psychological Domais. Training group also presented a significant increase to isokinetic peak torque at 60/s for knee flexors, knee extensors and ankle plantar flexors; power at 60/s for knee extensors and knee flexors, ankle dorsiflexors and plantar flexors. It was also observed a significant increase to isokinetic peak torque at 120/s knee flexors and extensors; power at 120/s for knee flexors and extensors. Time acceleration presented a significant decrease for knee extensors and ankle dorsiflexors at 60°/s and knee extensors at 120°/s. Furthermore, training group presented a significant improvement to performance at TUG that was maintained after 12 weeks that the training finished. Conclusion: Low-intensity group-based exercise training program may be efficient to improve knee isometric peak torque and knee and ankle isokinetic peak torque, power and time acceleration and performance at TUG.
Estudo de interações de parasitoides de insetos endófagos em frutos do cerrado
(Universidade Federal de São Carlos, 2010-03-08)
Nascimento, André Rangel
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Dias, Angélica Maria Penteado Martins
;
https://lattes.cnpq.br/8637344058859147
;
https://lattes.cnpq.br/1936839223951300
Interactions between endofagous insects in fruits play an important role in ecological communities, since the seed survivorship and hence the successes in recruitment of plant populations are directed related to damage caused by the herbivory from these insects. Because of the specialization of the herbivorous insects, the insect-plant interactions tend to be structured in compartments of insects which use different groups of plant. The aims of this study were: (1) to identify if insect-plant interactions in fruits of the cerrado are compartmented; and (2) to identify if plant species in compartments are related. With two monthly field trips, the fruits of 34 plant species were sampled. The insects that emerged from fruits were classified in morphospecies. A correspondence analysis was used to identify the compartments. About 97 morphospecies of insects were identified. Although there is no consensus if the competitive forces structure the compartmented networks or, if directly or indirectly, chemicals defences of plants, the compartmentation seems to be an overall characteristic of food webs and, thus, of insect-plant networks. There is also evidence of the role of the phylogeny in the structure of compartmented networks.
Influência das frentes frias nos mecanismos de funcionamento da represa da UHE Carlos Botelho (Lobo/Broa) Itirapina SP, dos pontos de vista químico, físico e biológico
(Universidade Federal de São Carlos, 2010-03-08)
Passerini, Mariana Duó
;
Tundisi, José Galizia
;
https://lattes.cnpq.br/5730659239785432
;
https://lattes.cnpq.br/1982495528270707
In Brazil there is a numerical predominance of river systems, which favors the construction of reservoirs. These reservoirs have great ecological, economic and social significance, so, the management, conservation and recovery of these systems are of fundamental importance with repercussions on the economy, social work and the uses of aquatic systems. Climatological phenomena, such as the passage of cold fronts, are important factors that influence the water quality of reservoirs. Given this, this work aimed to study the influence of cold fronts in the mechanisms of function of the hydroelectric reservoir of Carlos Botelho (Lobo/Broa), the change in the phytoplankton community, in the destratification of the water column and the change in chemical and physical composition of the reservoir, thus contributing to the understanding of the phenomenon of global circulation of aquatic systems, especially in shallow reservoirs. Two samples were collected for this work, one in the dry season and another in the wet season. The environmental variables were collected in the water column, resulting in the vertical profile of the reservoir. The results show that before the passage of the cold front, during periods of low wind speed, we could see the stratification formed in the water column. During the passage of the cold front, the stress of wind increase and the solar radiation decrease and temperature decreases, promoting vertical mixing of water, resulting in the destratified water column and thus providing homogeneity of physical and chemical variables and the resuspension of nutrients and diatoms that were dormant in the sediment and their rapid multiplication in the water column.
Formação e manutenção de classes de equivalência: um estudo com participantes da 3ª idade
(Universidade Federal de São Carlos, 2010-03-08)
Aggio, Natalia Maria
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Domeniconi, Camila
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https://lattes.cnpq.br/4553599639534161
The paradigm of stimulus equivalence has been widely studied, with different populations. Several studies have investigated the variables that can influence the formation and maintenance of equivalent stimulus classes. Regarding to formation, some authors point that the structure of train CaN and the arrangement simple to complex can facilitate this formation. Regarding to maintenance, some authors propose, for example, that classes with higher number of stimuli are more stable and are easier to be remembered over time. Despite the diversity of populations studied with procedures derived from the paradigm of stimulus equivalence, there is still a lack of studies with the elderly population. In order to enlarge the knowledge about the generality of the phenomenon of formation and maintenance of equivalent classes stimulus, this study proposed to investigate the formation of equivalent classes of different sizes and the role of this size in the maintenance of the classes with participants between 60 and 75 years. The procedure of matching-to-sample was used to teach three classes of equivalent stimuli composed of three or six stimulus (Condition 1 and Condition 2). The experimental procedure consisted of a training phase of baseline relations and testing of emerging relations, and six weeks after the first phase, a test was done with the emerging and learned relations to check the maintenance of classes formed. All participants showed the emergence of classes of equivalent stimulus. Three participants showed immediate emergency and five delayed emergency. All the participants who went through Condition 1 had percentages of correct responses below 90% in the test done after six weeks, while participants who underwent Condition 2 had hit percentages above 90%. Since most participants from Condition 2 showed accuracy right in the beginning of the test, it was not possible to evaluate the recovery of the relations throughout the test made six weeks later. This performance showed that the size of the class may be a relevant variant that influences the stability of the class over time, since the participants in the condition that trained with larger classes had better results on this test. This paper presents contributions to the studies of stimulus equivalence, since studies with this population are rare, and to understanding the factors involved in the formation and maintenance of stimulus equivalence.
Estudo da força de adesão de tortas de filtração de gases em diferentes condições operacionais
(Universidade Federal de São Carlos, 2010-03-08)
Barros, Priscila Martins de
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Aguiar, Mônica Lopes
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https://lattes.cnpq.br/0431688649128529
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https://lattes.cnpq.br/7778087902508837
Gas filtration is one of the most important methods used in gas-solid separation. During a filtration process, a gas containing an amount of solid particles passes through a porous filter medium which retains the particles. Particles are deposited throughout the filtration process forming a porous cake. The resistance to gas flow through the filter increases when the filtration cake is formed, which makes pressure drop increase. Once pressure drop is considered relatively high, the cake must be removed with cleaning processes in order to minimize resistance to gas flow and, consequently minimize operational cost. Thus, cake removal enhancements might represent important earnings, besides contributing to filtration process improvements. Therefore, this study had the objective of investigating the behavior of gas filtration cake removal from filter media through the determination of adhesion force per unit area in different operational conditions. This parameter is very important during dust cake removal, once it makes it possible to propose the best operational conditions for a more efficient removal. In this work, two types of particulate matter, phosphate concentrate and manioc starch, and three types of filter media, polypropylene, acrylic and polyester, were studied. Three superficial filtration velocities (5; 7.5 and 10 cm/s) and five different amounts of powder deposited on the filter medium, which respectively correspond to 0.039; 0.055; 0.064; 0.071 and 0.088g/cm2, were also examined. The dust cakes removal was performed by using the reverse air flow method, being the dust cakes submitted to various successive cleaning velocities. Therefore, each filter medium was cleaned at a lower velocity and, immediately afterwards, at a higher velocity, going through the following cleaning velocities 0.5; 1; 2; 3; 6; 9; 12 and 15 cm/s. Thus, a value of pressure drop was obtained for each cleaning velocity. The adhesion force per unit area was acquired with the method proposed by Seville et al. (1989). From the results obtained, it was verified that the values of adhesion force per unit area found were not influenced by the amount of powder deposited per unit area; the experimental data fit a single curve; the phosphate concentrate presented higher values of adhesion force per unit area when compared to the manioc starch; adhesion force values increased with the increase in gas superficial filtration velocity for both phosphate concentrate and manioc starch; the polypropylene felt presented the highest removal tension values followed by the acrylic and polyester felts; and that the higher the removal tension values the lower the values obtained for the effective separation distance between particles.