Estudo de Fractalidade e Evolu����o Din��mica de Sistemas Complexos

In this work, the study of some complex systems is done with use of two distinct procedures. In the first part, we have studied the usage of Wavelet transform on analysis and characterization of (multi)fractal time series. We have test the reliability of Wavelet Transform Modulus Maxima method (WTMM) in respect to the multifractal formalism, trough the calculation of the singularity spectrum of time series whose fractality is well known a priori. Next, we have use the Wavelet Transform Modulus Maxima method to study the fractality of lungs crackles sounds, a biological time series. Since the crackles sounds are due to the opening of a pulmonary airway bronchi, bronchioles and alveoli which was initially closed, we can get information on the phenomenon of the airway opening cascade of the whole lung. Once this phenomenon is associated with the pulmonar tree architecture, which displays fractal geometry, the analysis and fractal characterization of this noise may provide us with important parameters for comparison between healthy lungs and those affected by disorders that affect the geometry of the tree lung, such as the obstructive and parenchymal degenerative diseases, which occurs, for example, in pulmonary emphysema. In the second part, we study a site percolation model for square lattices, where the percolating cluster grows governed by a control rule, corresponding to a method of automatic search. In this model of percolation, which have characteristics of self-organized criticality, the method does not use the automated search on Leaths algorithm. It uses the following control rule: pt+1 = pt + k(Rc ��� Rt), where p is the probability of percolation, k is a kinetic parameter where 0 < k < 1 and R is the fraction of percolating finite square lattices with side L, LxL. This rule provides a time series corresponding to the dynamical evolution of the system, in particular the likelihood of percolation p. We proceed an analysis of scaling of the signal obtained in this way. The model used here enables the study of the automatic search method used for site percolation in square lattices, evaluating the dynamics of their parameters when the system goes to the critical point. It shows that the scaling of , the time elapsed until the system reaches the critical point, and tcor, the time required for the system loses its correlations, are both inversely proportional to k, the kinetic parameter of the control rule. We verify yet that the system has two different time scales after: one in which the system shows noise of type 1 f , indicating to be strongly correlated. Another in which it shows white noise, indicating that the correlation is lost. For large intervals of time the dynamics of the system shows ergodicity

Avalia����o do banco de disserta����es e teses da associa����o brasileira de antropologia: uma an��lise cienciom��trica

VITULLO, Nadia Aurora Vanti. Avalia����o do banco de disserta����es e teses da Associa����o Brasileira de Antropologia: uma an��lise cienciom��trica. 2001. 143 f. Disserta��ao (Mestrado) - Curso de Mestrado em Biblioteconomia e Ci��ncia da Informa����o, Pontif��cia Universidade Cat��lica de Campinas, Campinas, 2001.

Biblioteca digital de teses e disserta��oes: uma refer��ncia fundamental

OLIVEIRA, Raimundo Muniz de. Biblioteca digital de teses e disserta��oes: uma referencia fundamental. In: CINFORM ENCONTRO NACIONAL DE ENSINO E PESQUISA DA INFORMA��AO,HUMANISMO E DESENVOLVIMENTO CIENTIFICO E TECNOLOGICO,7.,2007,Salvador. Anais...Salvador:UFBA, 2007.Disponivel em:www.cinform.ufba.br>. Acesso em: 27 set. 2007. Acesso em: 27 set. 2010.

Bibblioteca Digital de Teses e Disserta����es: uma estrat��gia de preserva����o digital

CUNHA, Jacqueline de Ara��jo. Biblioteca Digital de Teses e Disserta����es: uma estrat��gia de preserva����o da mem��ria cient��fica. 2009. 141f. Disserta����o (Mestrado)- Programa de P��s-Gradua����o em Ci��ncia da Informa����o. Universidade Federal da Para��ba, Jo��o Pessoa, 2009.

Biblioteca Digital de Teses e Disserta����es: grau de utiliza����o pelos mestrandos do curso de Ci��ncia da Informa����o das Universidades P��blicas Brasileiras

A pesquisa aborda o uso das Tecnologias de Informa����o e Comunica����o, que vem revolucionando as atividades e ocasionando muitas mudan��as relacionadas ao acesso e uso de informa����es. O objetivo foi analisar o grau de utiliza����o do conhecimento cient��fico produzido pelos Programas de P��s-Gradua����o das Universidades P��blicas Brasileiras, atrav��s da BDTD, pelos mestrandos dos referidos programas. Nos procedimentos metodol��gicos realizados, procurou-se inicialmente analisar o amplo espectro da popula����o do corpus da pesquisa. Em raz��o da impossibilidade de trabalhar com os Programas de P��s-Gradua����o como um todo, optou-se por fazer um recorte, elegendo os cursos de P��s-Gradua����o em Ci��ncia da Informa����o, vez que estes representam o principal segmento social de interesse da pesquisa. Foi utilizado o m��todo de estudo de usu��rios, onde se optou por adotar o grupo, ���estudos orientados aos usu��rios���, que identifica as necessidades e comportamento de acesso e uso da informa����o. Para coletar os dados, elaborou-se um question��rio semi-estruturado com 25 quest��es, que versavam sobre o uso, dificuldades de acesso e recupera����o da informa����o, bem como a satisfa����o na utiliza����o dessa fonte informacional. Dentre os v��rios resultados obtidos, podemos destacar o fato de que a maioria dos mestrandos (71,8%) s�� teve contato com a BDTD somente no momento em que se encontrava cursando o mestrado e, somente 24,3%, tiveram contato durante a gradua����o. Estes resultados representam um problema, que pode afetar o bom desempenho do projeto BDTD, o qual consiste em disseminar e divulgar a produ����o cient��fica dos Programas de P��s-Gradua����o das Universidades P��blicas Brasileiras para a sua comunidade. Foi observado tamb��m, que os mestrandos oriundos do curso de Biblioteconomia tende a ter contato com a BDTD bem mais cedo do que mestrandos de outros cursos de gradua����o. A fim de minimizar o problema detectado, prop��e-se uma divulga����o mais eficaz na gradua����o atrav��s de dois procedimentos: Primeiro, o docente deve fazer uma divulga����o mais eficaz da BDTD junto aos discentes de todos os cursos de gradua����o; segundo: dever�� ser feita a divulga����o na m��dia eletr��nica, atrav��s da inser����o de ��cones da BDTD, nos portais dos Departamentos dos Cursos de Gradua����o das Universidades P��blicas Brasileiras. Acredita-se que com estes procedimentos seja poss��vel aperfei��oar o uso dessa fonte de informa����o cient��fica.

Bibliotecas digitais de teses e disserta����es brasileiras: paradigma do acesso livre �� informa����o cient��fica

A evolu����o da comunica����o cient��fica ao longo do tempo e o impacto causado pela A evolu����o da comunica����o cient��fica ao longo do tempo e o impacto causado pela A evolu����o da comunica����o cient��fica ao longo do tempo e o impacto causado pela se analisar as contribui����es da Biblioteca Digital de Teses e Disserta����es (BDTD)para a comunica����o cient��fica atual, destacando possibilidades emergentes e desafios a serem superados. Apresenta uma breve evolu����o da comunica����o cient��fica ao longo do tempo; discute os impactos causados pela Internet na comunica����o, disponibiliza����o e acessibilidade de informa����es t��cnico-cient��ficas; e caracteriza BDTD destacando os desafios a serem superados. Dentre eles est��o, a quest��o dos direitos autorais que ocasionam a baixa ades��o dos autores ao projeto piloto do IBICT para disponibilizar teses e disserta����es no meio eletr��nico. Para este desafio, s��o apontadas sugest��es.

Panorama brasileiro das bibliotecas digitais de teses e disserta����es

As bibliotecas de teses e disserta����es t��m um papel fundamental para o desenvolvimento cient��fico e cultural de um pa��s. Nesse sentido, buscou-se, de modo geral, analisar o panorama brasileiro das bibliotecas digitais de teses e disserta����es. Especificamente, objetivou-se caracterizar a sociedade da informa����o enquanto contexto das BDTD; caracterizar os v��rios tipos de bibliotecas surgidos a partir da inser����o das novas tecnologias de informa����o e comunica����o; identificar as diretrizes norteadoras da implanta����o de BDTD; e levantar as BDTD existentes no Brasil. Para tato, al��m de levantamento bibliogr��fico, realizou-se uma pesquisa nos sites de institui����es de ensino superior brasileiras que j�� disp��e de bibliotecas digitais de teses e disserta����es em funcionamento. A an��lise e interpreta����o destes dados nos permite considerar que no Brasil as BDTD encontram-se num est��gio embrion��rio, sendo relevante pesquisar a hist��rica implanta����o e configura����o desse novo modelo de biblioteca.

Novas propriedades do SKTI (Inibidor de tripsina de soja): inibi����o para elastase neutrof��lica humana e efeitos no processo de inj��ria pulmonar aguda

Seeds from legumes including the Glycine max are known to be a rich source of protease inhibitors. The soybean Kunitz trypsin inhibitor (SKTI) has been well characterised and has been found to exhibit many biological activities. However its effects on inflammatory diseases have not been studied to date. In this study, SKTI was purified from a commercial soy fraction, enriched with this inhibitor, using anion exchange chromatography Resource Q column. The purified protein was able to inhibit human neutrophil elastase (HNE) and bovine trypsin. . Purified SKTI inhibited HNE with an IC50 value of 8 ��g (0.3 nM). At this concentration SKTI showed neither cytotoxic nor haemolytic effects on human blood cell populations. SKTI showed no deleterious effects on organs, blood cells or the hepatic enzymes alanine amine transferase (ALT) and aspartate amino transferase (AST) in mice model of acute systemic toxicity. Human neutrophils incubated with SKTI released less HNE than control neutrophils when stimulated with PAF or fMLP (83.1% and 70% respectively). These results showed that SKTI affected both pathways of elastase release by PAF and fMLP stimuli, suggesting that SKTI is an antagonist of PAF/fMLP receptors. In an in vivo mouse model of acute lung injury, induced by LPS from E. coli, SKTI significantly suppressed the inflammatory effects caused by elastase in a dose dependent manner. Histological sections stained by hematoxylin/eosin confirmed this reduction in inflammation process. These results showed that SKTI could be used as a potential pharmacological agent for the therapy of many inflammatory diseases

Sintomatologia depressiva e avalia����o de n��veis de TNF&#945; IL-2 em indiv��duos idosos e com doen��a pulmonar obstrutiva cr��nica

The aim of the present study was to assess the presence of depressive symptomatology among elderly residents in long-stay institutions (LSI) and in the community of Recife, Brazil. In total, 81 long-stay elderly patients (mean age of 75.55 �� 9.18 years) and 132 elderly (mean age of 73.14 �� 8.27 years) individuals from the community were evaluated. Depressive symptomatology was assessed by the Geriatric Depression Scale (GDS-15), cognitive status by the Mini Mental State Examination (MMSE) and capacity to perform the activities of daily living (ADL) by the Katz Index. Comorbities and the use of medication were recorded. The LSI elderly exhibited more depressive symptoms (p < 0.001) and more dependency (p< 0.001). We observed no differences in MMSE (p = 0.058). The elderly in the community displayed more comorbidities and the LSI elderly consumed more medication (p < 0.001 and p < 0.001, respectively). According to multivariate analysis (logistic regression), being male, having no spouse and having a low schooling level are risk factors for depressive symptoms. In conclusion, most elderly with depressive symptoms received no medication fordepression.

Distribui����o regional da ventila����o pulmonar em indiv��duos com insufici��ncia card��aca cr��nica ap��s serem submetidos a um programa de treinamento da musculatura inspirat��ria e sua correla����o com dados funcionais

Introduction: Chagas Disease is a serious public health problem, with 5 million infected individuals in Brazil. Of these, approximately 30% develop chronic Chagas cardiomyopathy (CCC), where the main symptoms are fatigue and dyspnea. Objective: To correlate maximal exercise capacity with pulmonary function, inspiratory muscle strength and quality of life in patients with CCC. Methodology: Twelve individuals suffering from CCC were evaluated (7 men), with a mean age of 54.91�� 8.60 years and the following inclusion criteria: functional class II and III according to the New York Heart Association (NYHA); left ventricle ejection fraction below 45%; clinical stability (> 3 months); symptom duration > 1 year, body mass index (BMI) < 35Kg/m2 and non-smokers or ex-smokers with a history of smoking <10 packs/day. All subjects were submitted to spirometry, manometer testing, maximal cardiopulmonary exercise testing (CPX) and a quality of life questionnaire (Minnesota). Results: A negative correlation was observed between VO2m��x and MLHFQ scores (r=-0.626; p=0.03) and a positive association with MIP (r=0.713; p=0.009). Positive correlations were also recorded between MIP and spirometric variables [FEV1(r=0.825;p=0.001 ), FVC(r=0.66;p=0.01 and FEF25-75%(r=0.639;p=0.02)]. Conclusion: The present study demonstrated that in patients with CCC: VO2MAX is directly related to inspiratory muscle strength and quality of life, while deteriorating lung function is directly associated with respiratory muscle weakness

An��lise cintilogr��fica da deposi����o pulmonar de radioaerossol ap��s associa����o da nebuliza����o atrav��s dos dispositivos mesh e jato com a ventila����o n��o invasiva em indiv��duos normais e com pneumopatias obstrutivas cr��nicas

Coordena����o de Aperfei��oamento de Pessoal de N��vel Superior

Efeitos da defici��ncia de vitamina A na fun����o pulmonar de crian��as ap��s infec����o respirat��ria viral

Conselho Nacional de Desenvolvimento Cient��fico e Tecnol��gico

Recorte dos produtos educacionais em hist��ria no ensino da matem��tica e em did��tica da matem��tica a partir das disserta����es e teses defendidas no brasil entre 1990-2010

This work has the main purpose of conducting a survey of educational products present in dissertations and doctoral theses focused on the use of history in mathematics teaching and Didactics of mathematics with a French foundation produced in graduate programs in the strict sense of the Brazil between 1990 and 2010, the areas of Education, Mathematics Education, school of Natural Sciences and Mathematics and related areas, according to the research proposal of Mendes (2010). Our interest was to select the products that present concrete proposals for educational activities that can be used in the classroom of Basic Education and Training of Teachers of Mathematics. The research was implemented through a bibliographic study documents the Bank of dissertations and theses from CAPES, libraries and archives of some Postgraduate programs in the country who focus their studies on the subject object of this research, besides the Brazilian Digital Library Theses and Dissertations (BDBTD). From this survey we selected works that present educational products materialized in blocks of activities based on the use of teaching history of mathematics to the classroom as well as the sequence of activities based on the Teaching of Mathematics. In possession of material, produce a CD-ROM containing the selected activities, in order to help support the work of teachers regarding the use of these activities, as a supplementary material to textbooks in their math classes

Avalia����o da fun����o pulmonar em obesos m��rbidos com sonol��ncia diurna excessiva

Background: Obesity impairment to the pulmonary function related to the magnitude of adiposity and is associated with excessive daytime sleepiness (EDS) and snoring, among others symptoms of respiratory disorders related to sleep. It is possible that obese individuals with excessive daytime sleepiness may make changes in lung function on spirometry monitored during the day as a consequence of fragmented sleep or episodes of nocturnal hypoventilation that cause respiratory and changes that can persist throughout the day. The combination of these findings alone sleepiness observed by subjective scales with pulmonary function in obese patients is unknown. Objective: To assess the influence of EDS and snoring on pulmonary function in morbidly obese and distinguish between different anthropometric markers, the snoring and sleepiness which the best predictors of spirometric function and respiratory muscle strength and endurance of these patients. Methods: We evaluated 40 morbidly obese markers on the anthropometric, spirometric respiratory variables, maximal inspiratory and expiratory pressures (MIP and MEP) and maximal voluntary ventilation (MVV) and the measured excessive daytime sleepiness (the Epworth sleepiness scale) and snoring (snoring scale of Stanford). The data were treated when the differences between the groups of obese patients with and without sleepiness, whereas the anthropometric variables, respiratory and snoring. Pearson's correlation was performed, and multiple regression analysis assessed the predictors of pulmonary function. For this we used the software SPSS 15.0 for windows and p <0.05. Results: 39 obese patients were included (28 women), age 36.92+11.97y, body mass index (BMI) 49.3+5.1kg/m��, waist-hip ratio (WHR) 0.96+0.07 and neck circumference (NC) 44.1+4.2 cm. Spirometric values and respiratory pressures were up 80% of predicted values, except for endurance (MVV <80%). Obese with EDS have lower tidal volume. Positive correlation was observed between BMI and EDS, EDS and NC and between snoring and BMI, and negative correlation between EDS and tidal volume (TV), and between snoring and snoring FVC and FEV1. In linear regression the best predictor of pulmonary function was snoring, followed by NC. NC has more obese with higher strength (MEP, p = 0.031) and endurance (MVV p = 0.018) respiratory muscle. Conclusion: Obese with EDS tend to have lower TV. In addition, snoring and NC can better predict pulmonary function in obese when compared with other anthropometric markers or EDS. Obese patients with higher NC tend to have greater capacity for overall strength of respiratory muscles, but may have low muscle endurance

��n��lise da capacidade funcional e da distribui����o regional da ventila����o pulmonar em pacientes com doen��a de chagas

INTRODUCTION: Cardiac and pulmonary manifestations of the Chagas disease (CD) affect between 20-30% of the infected subjects. The chronic Chagas cardiomyopathy (CCC) has some peculiarities such as arrhythmias and, especially heart failure (HF) and is potentially lethal due to left ventricular dysfunction. How respiratory disorders, patients get progressive loss of functional capacity, which contributes to a poor quality of life related to disease. Measurements of lung volume by the movement of the chest wall surface are an alternative evaluation of lung function and kinematics of complex thoracoabdominal for these patients. OBJECTIVE: evaluate the kinematics of the thoracoabdominal complex through the regional pulmonary volumes and to correlate with functional evaluation of the cardiorrespiratory system in patients with Chagas disease at rest. MATERIALS AND METHODS: a cross-section study with 42 subjects had been divided in 3 groups, 15 composed for patients with CCC, 12 patients with HF of different etiologies and 15 healthful presented control group. An optoelectronic plethysmography (POE), Minnesota questionnaire, six minute walk test, spirometer and manovacuometer was used. RESULTS: It was observed in the 6MWT where group CRL presented greater distance 464,93��44,63m versus Group HF with 399,58�� 32,1m (p=0,005) and group CCC 404��68,24m (p=0,015), both the groups presented difference statistics with regard to Group CRL. In the manovacuometer 54,59��19,98; of the group CCC and 42,11��13,52 of group IC found group CRL presented 81,31��15,25 of the predicted versus, presenting in relation to group CRL. In the POE it observed a major contribution in abdominal compartment in patients with IC if compared like CCC and control groups. On the basis of the questionnaire of quality of life of Minessota, verified a low one groups CCC and IC 43,2��15,2 and 44,4��13,1, respectively (p<0,05) when compared with the control group (19,6��17,31). CONCLUSION: it seems that the patients with CCC possess same functional and respiratory characteristics, observed for the POE, 6MWT, manovacuometer and spirometer to the patients of group HF, being able to consider similar interventions for this complementary group as therapeutical of this neglected disease