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A influência das instituições nos modelos de organização universitária: um estudo de caso comparativo entre UFABC e UFSCAR
(Universidade Federal de São Carlos, 2019-03-19)
Assis, Ana Carolina Tonelotti
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Côrtes, Mauro Rocha
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https://lattes.cnpq.br/8988613760967305
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https://lattes.cnpq.br/5508942043664509
This research aimed to analyze how institutions - shared rules and meanings that guide social interaction - influence the organizational modeling of the Federal University of ABC (UFABC) and the Federal University of São Carlos (UFSCar), with regards to the coordinations of undergraduate courses. UFSCar, the first federal university to be implemented in the State of São Paulo, was based on the North American model of university management and is structured in departments. On the other hand, the organization of the Federal University of ABC, the newest of the State, and one of the youngest in Brazil, was conceived under the commitment of university reform, signed by the Manifesto of Angra, influenced by the European reform movement, and emphasize the abolition of departments, aiming to assign an interdisciplinary dynamic to higher education. In view of the two conceptions of university model, this work was developed from open, semistructured interviews conducted with coordinators and vice-coordinators of courses of the two universities. Courses were selected that the universities have in common, as a way of reducing the "variability" of the situations that the coordinators face and, as a result, favor the possibility of comparison. The questions were defined using as a theoretical framework the New Institutionalism, especially its sociological school. The interviews were analyzed according to the following variables: sources of isomorphism, patterns of connection and distribution of resources, efficiency and effectiveness of formal rules, strategic agents and institutions. In spite of the differences in their organizational models, which imply different degrees of verticalized and horizontal connections, similar isomorphic forces were observed acting on the coordination of course coordinates. In the case of UFABC, however, the mimetic isomorphism has a particularity: the lack of reference to be mimicked.
O desenvolvimento de competências profissionais: um levantamento com os egressos de um curso de mestrado profissional do campo de públicas
(Universidade Federal de São Carlos, 2019-03-19)
Avaristo, João Augusto de Campos
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Ubeda, Cristina Lourenço
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https://lattes.cnpq.br/6696784421924024
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https://lattes.cnpq.br/8763561480208525
This research aims to map the main competences developed by the graduates of the Professional Master’s degrees in Management of Organizations and Public Systems, of the Federal University of São Carlos (UFSCar), as a consequence of the accomplishment of the said course. For this, a historical contextualization of the people management as field of study is made; presenting crucial concepts of the evolution of people management, such as strategic management and competency-based management, the historical evolution of labor relations in the public service since from the Vargas Government, up to Lula/Dilma Governments. It’s also made a portrait of the identifiable competencies in professionals of the public services; besides of contextualize, seeking to understand the post-graduation in Brazil, until the Professional Master’s Degree. It is about a quantitative research, applied, descriptive and exploratory, whose adopted method for the data to collect is the survey, through a cross-sectional study, of structured questionnaires on a Likert scale. The results are analyzed and discussed based on tables, graphics, dispersion measures and other methods, that allow us to trace the graduates profile of the course, enabling the comparison between the data collected in this research and the data presented by Capes; in this way, we can define that the profile of the ex-students indicates a population that is essentially feminine, working in the Federal public service, with age between 35 and 39 years old. Regarding competencies, with the help of an indicator called a standard score, a ranking of the competencies explored in this study was elaborated, identifying which one had higher and lower development indices, for the graduates, as a result of the post-graduation; after such ranking, competences were grouped into three categories: high, medium, low and very low degree of development, according to the definition of the median and quartiles of the data obtained. Thus, this research aims to foster discussions in the field of competence-based management in the public service, to build subsidies for self-reflection in postgraduate programs, as well as to support other researchers, contributing to effective and efficient people management within the public administration.
Problema de composição de frota: uma abordagem sequencial de simulação-otimização com horizontes rolantes
(Universidade Federal de São Carlos, 2019-03-19)
Faria, Luis Filipe Figueira de
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Silva, João Eduardo Azevedo Ramos da
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https://lattes.cnpq.br/3823047207711289
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https://lattes.cnpq.br/5110053347970711
To physically distribute finished goods, shippers can hire third-party logistics (3PL) in order to meet the forecasted demand by the customers. Nevertheless, the contract made between shippers and 3PL is based on decisions that need to be considered over several time horizons: strategic, tactical and operational. This question, known as fleet dimensioning or fleet composition problem, has been vastly approached in literature, divided mainly into two Operational Research’s techniques: Systems Simulation and Optimization. However, it is known that these techniques when applied in a pure or isolated form are not capable of delivering the adequate solution for the problem, once they need several simplifications, in the case of Optimization, or require an exhaustive analysis process, in the case of Simulation. The aim of this study is to propose a sequential simulation-optimization method with rolling horizons to integrate the solutions given by both techniques and provide a much more adequate result for the decision maker. As result, the more realistic dynamical and stochastic characteristics of the simulation model and the optimized fleet provided by the optimization model are successfully united in a rolling horizon environment. This combination has been analyzed over three different scenarios of demand variation, from 10 to 30%. When comparing to the isolated optimization, it can be highlighted the quantity of SPOT vehicles needed to overcome the unpredictability of transport solicitations and the relative costs of not considering simulation on decision making, which can increase the final costs of dimensioning implementation by up to 30%. Therefore, it becomes possible for the shipper to periodically re-evaluate his fleet dimensioning, providing a much safer decision-making process and a much better use of resources.
Superfícies de Curvatura Média Constante no Espaço Euclidiano
(Universidade Federal de São Carlos, 2019-03-19)
Santos, José Ramos Araujo dos
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Barreto, Alexandre Paiva
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https://lattes.cnpq.br/3369766702725474
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https://lattes.cnpq.br/0172508920060518
This paper deals with the surfaces of constant mean curvature in the Euclidean space. The first part of the text is devoted to minimal surfaces. We begin our studies with the Enneper-Weirstrass Representation Theorem and discuss some of its most important applications such as Jorge-Xavier, Rosenberg-Toubiana, and Osserman Theorems. Next, we present the Principle of Tangency of Fontenele-Silva and use it to demonstrate the classical half-space Theorem. We close this part by discussing the topological constraints imposed by the hypothesis of finite total curvature. In the second part of the manuscript we studied the surfaces of constant mean curvature, possibly non-zero. We start with Heinz's Theorem and its applications, we present the classification theorem of the surfaces of rotation with constant mean curvature made by Delaunay, and we conclude with the concept of stability where we demonstrate the classical Sphere Stability Theorem. We close the text with a succinct presentation of recent results on the surfaces of Weingarten in the Euclidean space.
Espectroscopia micro-Raman e MEV/EDS aplicados a minerais do Craton São Francisco: evidência da formação de pirita mediada biogenicamente e suas conexões com a origem da vida
(Universidade Federal de São Carlos, 2019-03-19)
Cruz, Daniele Caroline Fonseca
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Constantino, Carlos José Leopoldo
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https://lattes.cnpq.br/6118325967319836
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Dias, Airton Natanael Coelho
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https://lattes.cnpq.br/7070166380084691
The occurrence and isotopic composition of carbonaceous components in ancient rocks are strong evidence of life forms on the Earth's surface since the Eoarchean (> 3.7 Ga). These organic components are found in rocks formed in different contexts and the earliest examples of organic matter are found in Isua Greenstone Belt rocks (> 3.7 Ga) in Greenland; in the Pilbara Craton, at the North Pole Dome region (> 3.4 Ga), Australia; and in South Africa, in the Greenstone Belt of Barberton (> 3.2 Ga). In these examples, organic matter is associated with rocks formed in oceanic environments, in the vicinity of exhaling fumaroles, as well as in coastal environments. Another important example is the Witwatersrand Basin (2.9 to 2.7 Ga) in South Africa, where the organic matter is found widespread as bitumen, oil fluid inclusions and graphite inclusions in detrital components of conglomerate horizons. Organic matter in this basin has an intrinsic relationship with gold mineralization, uranium, and pyrite. Specifically, in the São Francisco Craton, State of Bahia, there are two deposits that have similarities with those mentioned above, although there are differences between their ages of formation. The first of these occurs in the Mundo Novo Greenstone Belt. The second deposit, represented by the conglomerates of the Jacobine Basin, is in many ways similar to the Witwatersrand Basin and its mineralization of gold, uranium, and pyrite. In both deposits are reported the occurrence of organic matter. For this reason, analyzes were performed via micro-Raman spectroscopy and SEM/EDS on pyrite grains to identify and characterize the association of the organic matter with gold deposits of Jacobina Basin and the Fazenda Coqueiro VMS deposit, of the MNGB, Bahia, Brazil. The results clearly show the presence of carbonaceous agglomerates (characteristic of organic matter) - peaks between 1400 and 1660 cm-1. Moreover, the presence of cline and calcochlorites also identified in the micro-Raman spectra potentiate the presence of organic matter. In addition, it will be held later dating (direct or indirect) of the material in order to include it within the Archean Era. This result is of great importance to science because it would record that primitive life forms on Earth's surface would be dated more than 3 Ga.
A construção do conhecimento matemático nas experiências vivenciadas com crianças pré-escolares
(Universidade Federal de São Carlos, 2019-03-19)
Passarini, Dulcineia Mara Aparecida Moreira
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Tomazzetti, Cleonice Maria
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https://lattes.cnpq.br/4821077407620769
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https://lattes.cnpq.br/2613527855738039
This research was carried out with preschool children of a Municipal Early Childhood Education institution, in the city of Piracicaba, and aimed to identify relationships of playing with mathematical knowledge, promoted from the experiences experienced with children in everyday life and in the games of Early Childhood Education, being guided by the following question: What mathematical knowledge is built from the experiences experienced with children in preschool phase? For this, it was used the qualitative research as a methodological basis with the design of a case study from the pedagogical project "The construction". This was born from listening to the voices, movements and gestures of children during the play with pieces of wood, recognized as unstructured material. The data were produced by means of observation, recording, reflection and discussions of those involved during the elaboration and execution of this project. To analyze the data, we opted for data triangulation: children's speeches recorded in the researcher's field diary, implementation of the pedagogical project and observations of the experiences with the children. After establishing the triangulation of the data produced during the research, two categories of analysis were listed from the problem issue, a priori, and the emergence of the case study, a posteriori: The involvement of children during the experiences with civil construction and the mathematical knowledge present in the experiences with civil construction. The research shows the involvement of children during the experiences, since it started from the discovery of the world of construction, a curiosity initially demonstrated through play. The mathematical knowledge understood as one of the children's languages was an integral part of the possibilities experienced by children in play, involving the notions of inside and outside, greatness, correspondence one by one, and geometry. The research identified that, with the project's proposal, the children came into contact with more elaborate cultural forms in contact with plants of houses and with the construction of a barbecue, using objects suitable for this purpose during the games. Through the interactions, the children researched the objects and their possibilities in the reproduction of the characteristics of civil construction, and with the mediation of the teacher-researcher, the children came into contact with the mathematical knowledge inserted in the games, expanding the cultural repertoire on the subject.
Mapeamento da participação feminina em ações de ensino, pesquisa e extensão no Instituto Federal de São Paulo (IFSP): um estudo exploratório
(Universidade Federal de São Carlos, 2019-03-19)
Santos, Camila Fátima dos
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Rigolin, Camila Carneiro Dias
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https://lattes.cnpq.br/2388584081961836
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https://lattes.cnpq.br/4287711222508230
The present study has the purpose of studying the mapping of female participation in teaching, research and extension actions within the scope of the Federal Institute of Education, Science and Technology of São Paulo (IFSP), and the first of these three pillars is analyzed gender issues in a more comprehensive way. To justify the relevance of the work, it is based on the idea that science is not neutral and that, therefore, there are significant differences in the participation, rise and permanence of women in science and technology. Thus, the results obtained provide a diagnosis of how the female participation has been worked in the institution, making possible the adoption of strategic decisions in order to promote gender equity in its context. The research is structured in three parts, (i) bibliographical survey, (ii) documentary research and (iii) field research. The first one allows us to construct an overview of the subject in the areas of science and technology in a national and international panorama, as well as a historical trajectory of the feminine achievements in the promotion of equity and the definition of concepts pertinent to the theme. The second phase, documentary research, analyzes programs, projects and actions focused on gender, or more specifically on women's participation, in the three pillars that support the institution: teaching, research and extension. In the field of education, the pedagogical projects of the 138 undergraduate courses offered in the IFSP by the year 2018 were examined, identifying disciplines that address the issue of gender in its menu or bibliography. In the scope of the extension, programs, projects and other actions were mapped through open data of the IFSP, having as object of analysis the female participation. Concluding the documentary research, we present data related to research groups linked to the institution, also mapping the presence of women in certain contexts. Finally, some of the proponents of these actions, obtained through interviews, are brought in order to better characterize the context and final considerations regarding the research as a whole. It is concluded that there are significant advances on the part of the Institution in promoting a more egalitarian environment, since the discussion has been gaining strength in the various spheres. However, there are still gaps in studies and initiatives to be taken, since there are areas with a very small female participation when compared to men.
Aplicação de imagens orbitais na espacialização do volume de Eucalyptus sp. via redes neurais artificiais
(Universidade Federal de São Carlos, 2019-03-20)
Arteaga, Argemiro José Moreno
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Thiersch, Cláudio Roberto
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https://lattes.cnpq.br/8791966697254106
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https://lattes.cnpq.br/8986029468044040
The sustainable agriculture of forest plantations demands the permanent monitoring of the quantity of processed wood, thus becoming difficult to monitor large planted areas by using only manual procedures. Therefore, in this research artificial neural networks (RNA) of multilayer perceptrons, were modeled to estimate the spatial of wood volume in a Eucalyptus sp plantation located in the state of Mato Grosso del Sur in the Central-West region of Brazil. As input variables in the RNA spectral bands, the textures of the bands obtained with Gray Level Co-Occurrence Matrices and vegetation index were used, which were derived from digital satellite image Spot 6. The resulting RNA with the best performance presented accuracy of 93.32% and coefficient of determination of 0.9761. However, this network presented a mean square error of 16.32% (RMSE de 7.85 m3ha-1), but with a unbiased distribution of the residuals. So, the model showed to be suitable to monitor the amount of wood in large areas without overestimating or underestimating the prediction. Compared with different machine learning methods using the same variables, the built network seems to have a higher precision and accuracy. Even in the neuronal models using only spectral bands and vegetation indexes, a better performance was evidenced, showing that the textures contribute in the improvement of predictions.
O papel da narrativa digital para comunicação no cuidado de pessoas com demência
(Universidade Federal de São Carlos, 2019-03-20)
Silva, Paula Fernanda Carlos da
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Frohlich, David
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Castro, Paula Costa
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https://lattes.cnpq.br/3790263464498111
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https://lattes.cnpq.br/2357351755964567
Considering the epidemiologic transition, dementia has become a paramount issue in public health due to its high prevalence and the gravity of its consequences. In this context, the use of Information and Communication Technologies (ICT) could provide support for digital narratives as a communication tool for a patient with dementia, family members and caregivers. Objective: To explore the issues of communication with formal and informal caregivers of the persons with dementia in the context of long-term care home and home / community context. Method: The present study is an international collaboration project with the project "When TiME matters: digital narrative in home care environments" between researchers from UFSCar and the University of Surrey (UK), in two parts. The first part is a case study in a long-term care institution (ILPI) located in the countryside of the state of São Paulo, Brazil, with caregivers from the staff, older person with dementia and family members who used digital narratives for a one-month trial period. The second part was an interview qualitative study with 10 end-users (formal and informal carers) who work with home care for people with dementia. Results: The results point to the social nature of technology and the importance of the role of the caregiver as facilitator in this process. The results of the case study demonstrated that in general, the technology was more useful in facilitating richer conversations with residents and other participants, as well as stimulating greater expressiveness and creativity in the person with dementia. Furthermore, the results found in the second study showed enthusiasm for adoption of digital narratives as a form of multimedia communication between people with dementia and their caregivers, as well as identifying requirements and needs in communication and emphasizing the importance of inclusive social media in the context of dementia.
Descentralização da Gestão Ambiental Pública: o licenciamento ambiental municipalizado em Araraquara-SP
(Universidade Federal de São Carlos, 2019-03-20)
Araujo, Clemerson Luiz Pereira de
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Carvalho, Joelson Gonçalves de
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https://lattes.cnpq.br/0141039743607067
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https://lattes.cnpq.br/5063172163316237
The current essay aims to contribute to the discussions about the decentralization of public environmental management, in particular the municipalization of environmental licensing, going through the mechanisms used in the State of São Paulo, among them “Programa Município Verde/Azul” (Green/Blue Town Programme”) and the regulations on the municipalization of licensing. It also compares the procedures of environmental licensing performed in the town of Araraquara-SP with the ones performed by CETESB in São Carlos-SP. For this purpose, a documentary and bibliographic survey were done along with a semi structured questionnaire, in order to analyze the public agents impressions of both municipal and State government activities, as well as the users sense of satisfaction. The results showed that despite the initial expectations that municipal management could make the process more effective, there was no time reduction in municipal license releases as there was no investments to update the processes of analysis. Unlike the State administration, that after having gone through a virtualization process of license application, had the licenses for low environmental impact projects automatically released through an internet portal. However, we notice a greater accuracy in the town of Araraquara concerning the analysis and mitigation of the environmental impacts caused by licensed projects, besides a better relationship between municipal public agents and the community, proving the benefits of decentralization.
“Como é no seu país?” Estudo autoetnográfico de uma prática pedagógica em Português Língua de Acolhimento para mulheres migrantes no Brasil: implicações para a formação de professores
(Universidade Federal de São Carlos, 2019-03-21)
Bottura, Eleonora Bambozzi
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Paula, Sandra Regina Buttros Gattolin de
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https://lattes.cnpq.br/9228036521343293
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https://lattes.cnpq.br/7573267318068355
This doctoral thesis consists of an autoethnographic doing and writing of my lived experiences as a teacher of Portuguese Welcoming Language (PWLg) in an exclusive course for vulnerable immigrant and refugee women in Brazil. The choice for the methodological approach derives from the inevitable and necessary outcome of my practice as a teacher and researcher. Teaching PWLg is linked directly to the context of contemporary migrations and it is constituted by strong social, humanitarian and political functions, aiming at the integration of migrants in Brazilian society. The complexity of the context when it comes to its didactic-pedagogical field relying on transformative practices and social justice; and the need for investigating teachers Education and practice require an autoethnographic perspective. The approximation of PWLg to autoethnography is developed along the whole thesis. PWLg is presented, as well as the discussions about migrant women and their higher vulnerability that strongly influences the learning process, therefore, their integration in society. Emotions emerging from the relation students-teacher and its relation to autoethnography itself are also articulated. Thus, I search for addressing teaching locality and contingency through wider lenses for doing research. The bond with subjectivity is enhanced, by exposing subject/object of research, recognizing and auto investigating my own pedagogical practice and its possible implications for Teachers Education critically. In this sense, data are discussed and presented, thereby the unveiling of dilemmas, frustrations and emotions that contributed for generating high tension as I engaged weekly in the encounters with participants. The tension turning point has given me some reorientations for practice and research in PWLg, thus, transforming them. There are compelling evidences for discussion of interculturality and identities. From the data it is possible to discuss the possibility of an intersectional perspective for helping teachers addressing and dealing with categories of gender and race in their teaching practices. Also, it seems to be paramount for the teachers to be aware of the reasons why migrant women are more vulnerable and to rethink teachers’ practices and education when it comes to gender. Emotions seem to reveal an enriching path for comprehending a more sensitivity to context, aligned to the emotional dimension already considered by PWLg concept. Finally, I defend the implications for teachers’ education considering the teacher as a researcher, moved by affect and availability for critical self-interrogation and more sensible to contexts needs. I expect that this thesis sensitizes teacher for the idiosyncrasies involved in teaching-learning PWLg, which can cause serious dizziness, disestablishing fundamental issues of their professional identities. I also desire that this study may represent one of the possibilities for exploring autoethnography potentialities, by contributing to its productions and meanings in the field of Applied Linguistics in Brazil.
Cadeias estocásticas de memória ilimitada com aplicação na neurociência
(Universidade Federal de São Carlos, 2019-03-21)
Ferreira, Ricardo Felipe
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Gallo, Alexsandro Giacomo Grimbert
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https://lattes.cnpq.br/4037274656833325
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https://lattes.cnpq.br/2355076087945221
Stochastic chains with unbounded memory are a natural generalization of Markov chains, in the sense that the transition probabilities may depend on the whole past. These process, introduced independently by Onicescu and Mihoc in 1935 and Doeblin and Fortet in 1937, have been receiving increasing attention in the probabilistic literature, because they form a class richer than the Markov chains and have practical capabilities modelling of scientific data in several areas, from biology to linguistics. In this work, we use them to model interactions between spike trains. Our main goal is to develop new mathematical results about stochastic chains with unbounded memory. First, we study conditions that guarantee the existence and uniqueness of stationary chains compatible with a discontinuous family of transition probabilities. Then, we address the understanding of the phenomenology of spike trains and we propose to use directed information to quantify the information flow from one neuron to another. In this occasion, we fix concentration bounds for directed information estimation.
Entre mágoas e sonhos do povo: Lima Barreto e o folclore urbano
(Universidade Federal de São Carlos, 2019-03-22)
Carneiro, Daniel Machado Vivacqua
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Marques, Wilton José
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https://lattes.cnpq.br/5763590592946918
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https://lattes.cnpq.br/2058759808670205
A stage of the great transformations that served as a vector of the modernization of Brazil in the passage from the nineteenth century to the twentieth century, Rio de Janeiro comprehended such a great diversity of people from all regions of the country, as well as foreigners, who took Lima Barreto to see it not only as Federal Capital, but also as the country's “spiritual capital”. The sorrows and dreams of the people represent a plunge of the chronicler of the suburb of Todos os Santos in the universe of customs and popular beliefs found in the city he loved so much. The present study tries to demonstrate that, like all the work in chronicle of the author, this series of texts about the Brazilian urban folklore represents a criticism to the modernization of the country done, particularly, from flagrant ones that reveal the incorporation of modern values in the popular culture. In it one can observe the comprehensive manner in which Lima Barreto portrays the people and it’s “spiritual transformation” reflecting on the future of the country and defending the ideal of a society of solidarity.
Retratos da escravidão em Vozes d’América (1864), de Fagundes Varella
(Universidade Federal de São Carlos, 2019-03-22)
Mega, Rebeca Aparecida
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Marques, Wilton José
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https://lattes.cnpq.br/5763590592946918
;
https://lattes.cnpq.br/8084586094028727
Se presentan, en este trabajo, consideraciones acerca de la producción literaria de Fagundes Varella (1841-1875), sobretodo aquella cuyo temario reúne discusiones alrededor de una circunstancia peculiar: la esclavitud y la miseria humana del negro africano – condición que diseñó y sostuvo al Brasil desde el siglo XVI. Se considera, por ello, un texto representativo de una recopilación poética del escritor de los primeros cuatro años del decenio de 1860: o poema, “Mauro, o escravo”; la obra, Vozes d’América (1864). La implementación de temas esclavistas, si entendidos como disposiciones históricas que acentuaron la producción literaria de Varella, matizaron un público lector compuesto de círculos sociales propios de su convivencia en la línea Rio-São Paulo y pudieron no solamente anticipar la visada abolicionista que se manifestaba en el Romanticismo de aquel momento, sino también denunciar al tratamiento superficial que era ofrecido al problema de la esclavitud por parte del sistema político brasileño – hecho que afectó, inevitablemente, la dedicación literaria de la generación. Se observa que, en el decenio en cuestión, el autor trajo al ruedo el sentimiento antiesclavista y la conciencia del problemático pilar que sostenía la estructura socioeconómica brasileña mediante el empleo de retratos de la realidad esclavista de la provincia, en el poema considerado, y mediante la reverberación temática de símbolos asociados al universo de la esclavitud en otras composiciones. Este sentimiento, que ya había ventilado el comienzo del movimiento romántico por las manos del poeta Gonçalves Dias, recibió contornos más nítidos, por ejemplo, entre el 1861 y el 1869, con los poemas de Castro Alves, contemporáneo de Varella. Sin embargo, específicamente en el caso de Varella, se presenta la observación de que el poema “Mauro, o escravo” es lo que abre la recopilación Vozes d’América (1864) y el único que enfoca, con densidad y de modo inaugural, la cuestión esclavista, tanto en el libro cómo en la obra literaria de Varella de modo general. A este poema se destina especial enfoque, con el reto de validar al presupuesto de que Varella, casi siempre identificado por la buena o mala crítica como un ultra romántico decadente, puede que sea redescubierto y leído, también, como un poeta-autor-destaque del Romanticismo paulista y, cómo no, un poeta-crítico-osado por, justamente, haber puesto en discusión un asunto de tanto peso social para la época y cuyo retrato era, más allá de complejo, literariamente evitado.
Modelos alternativos da TRI para dados politômicos
(Universidade Federal de São Carlos, 2019-03-22)
Silva, Marcelo Andrade da
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Bazán Guzmán, Jorge Luis
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https://lattes.cnpq.br/7302778157579178
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https://lattes.cnpq.br/5641187629276460
The item response theory (IRT) models for polytomous data are frequently used in the analysis of data coming from the behavioral and social sciences. From a practical point of view, polytomous data are more informative than dichotomous data, since it considers more than two response categories in each test item, making the models assigned to this type of data attractive. The purpose of this research is to explore alternative polytomous IRT models and their multidimensional extensions, filling some gaps in the literature. Specifically, the chapters of this work follow a construction sequence of IRT modeling. Firstly, we conducted a study to assist readers in choosing between two of the major polytomous IRT models in the one-dimensional context: the graded response (GR) model and the generalized partial credit (GPC) model. We conducted a sensitivity analysis of priors to choose a suitable priors scenario for each model and we verified the performance of some model comparison criteria against these models through a simulation study. Then, we extend the one-dimensional GPC model to the bifactor context, proposing the GPC-bifactor model, in which a global latent trait and specific latent traits are considered through an additive structure in its formulation. In addition, we flexibilize the structure of the GPC-bifactor model, making possible its use with other link functions beyond the usual logit, such as probit and clog-log. Then, we incorporate the relation between the items and the latent trait dimensions of the individuals in the formulation of the multidimensional item response theory (MIRT) models through the Q-matrix, a component present in the vast majority of cognitive diagnostic models (CDM), making it easy for users to express the item-trait relationship in MIRT models. Finally, we propose a validation method using the Q-matrix in MIRT models. In particular, we used in the study the multidimensional GPC model with Q-matrix embedded in its formulation. The different simulation studies and the applications performed in this research showed that these models are alternative models for the analysis of polytomous data and that can be used by the users in practice.
O uso da geometria fractal como ferramenta no ensino de progressões geométricas e logaritmos
(Universidade Federal de São Carlos, 2019-03-22)
Vieira, Diogo Comin
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Salvador, José Antonio
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https://lattes.cnpq.br/2487171069472158
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https://lattes.cnpq.br/4128546204648929
This essay is a study that seeks to introduce Fractal Geometry as a tool in Geometric Progressions and Logarithms teaching in high school, more precisely in the 1st (first) year, but the presented activities unfold a possibility of application in several Math teaching segments. The goal of this work is to provide theoretical basis and a didactical sequence that reaches several levels of contents mastery, so teachers may work the Fractal Geometry as a motivator agent at teaching and deepening the concepts that were studied in the classroom, also opening the possibility for an approach of themes such as Limits and Convergence of Sequence, even in an intuitive way. This didactical sequence application in the classroom starts with Fractal Cards cutting out, which is a playful (ludic) and funny activity, goes through the relations between Fractal and the subjects studied in high school, up until the development of general formulas and the demand of a certain algebraic mastery, ending in an interesting application of Logarithmic properties.
Modelos de Controle de Acesso Sensíveis ao Contexto com uso de Smart Contracts
(Universidade Federal de São Carlos, 2019-03-22)
Souza, Marcos Vinicius Menezes Rodrigues de
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Guardia, Hélio Crestana
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https://lattes.cnpq.br/1780902767520967
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https://lattes.cnpq.br/2834699287629948
The constant advances in ubiquitous computing and in the Internet of things (IoT) bring new challenges to access control systems, such as building a mechanism not dependent on a centralized trusted party, and the need to account for contextual data. Such characteristics may be required to enable IoT services in smart homes, smart cities, medical services, or even in mobile computer based health monitoring systems. In these distributed computing environments, direct device to device interactions are commonly based on service requests among the participants, which reinforce the need for flexible and scalable authenticity and confidentiality mechanisms. This work deals with the development of an access control model to address such challenges using a blockchain infrastructure. In the proposed method, services and contextual data are defined using smart contracts, and blockchain logs are used for distributed and trustful information management. Blockchain assets are associated with permissions, and their transfers are used to directly verify access control rights in service invocation requests. A reference implementation of the the proposed model has been developed using the Hyperledger system and the results show the viability of this methodology.
Nanoemulsões de óleos essenciais: mecanismos de estabilidade e interação com pectina em bionanocompósitos para aplicação em embalagens ativas
(Universidade Federal de São Carlos, 2019-03-22)
Lorevice, Marcos Vinicius
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Mattoso, Luiz Henrique Capparelli
;
https://lattes.cnpq.br/5839043594908917
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https://lattes.cnpq.br/2975504886357030
Microbial growth is among the challenges impairing food preservation and shelf-life. Essential oils (EO) featuring antimicrobial and antioxidant activities denote an alternative for lessening the contents of synthetic additives that may be harmful to human health. The limitations due the low EO solubility in water and their poor stability in aqueous media have been suppressed by the use of nanoemulsions (NE), which feature kinetic stability, intensify the antimicrobial effect of EO, and allow their dispersions in aqueous systems such as those involving polysaccharides for applications as packaging materials. The objective of this study were i) the production of NE having rosemary or clove EO as dispersed phase through high-energy (microfluidization - MF) or low-energy (catastrophic phase inversion - CPI) emulsification methods; ii) the evaluation of the NE stability with regard to the surfactant content in relation to the dispersed phase; and iii) the NE incorporation into pectin films to investigate the interaction among the components and the effect of the surfactant content on the physicochemical and active properties of the nanocomposites. The NE were characterized as to their average droplet sizes, zeta potentials, colloidal stability, and morphology. The films were evaluated as to their film-forming viscosity, morphology, wettability by water as well as mechanical, antimicrobial, and antioxidant properties. Regardless of the EO, the CPI-produced NE presented average droplet sizes and zeta potentials ranging from 100 to 500 nm and from -10 to -1 mV, respectively, being surfactant concentration and location the major factors affecting polydispersity. The MF was more efficient than CPI because the former led to average diameters ranging from 10 to 100 nm, and surfactant content was the dominant factor. The rosemary NE obtained through MF were more stable against creaming than clove NE against sedimentation. Cryo-TEM images indicate quasi-spherical particles with polydisperse diameters for CPI and homogeneous pattern for MF. Dynamic light scattering experiments did not evidence electrostatic interactions among pectin and surfactant, but the increased viscosity for surfactant contents between 10 and 20 wt.% suggested possible hydrophobic interactions, which led to films with increased hydrophobicity as well as sponge-like internal for both pectin/surfactant and pectin/NE films. The tensile strength and elastic modulus were decreased for surfactant contents higher than 20 wt.%. Rosemary EO exhibited antioxidant activity by capturing 85% of DPPH radicals and presenting an EC50% value of 50% of the initial EO concentration. The EC50% was decreased in the nanocomposites because of EO loss through evaporation upon drying, without any effect of the surfactant. On the other hand, antimicrobial activity was not detected because of the EO diffusion towards the culture medium, which was limited by the surfactant quantity and low oil-soluble in aqueous culture medium. This reported study is innovative because it relates the properties of pectin/rosemary NE nanocomposites with the content and characteristics of the surfactant, paving the route for a novel understanding on the role played by each component on the active and physicochemical properties.
Programa de Habilidades Sociais com pais e professores: efeitos sobre educadores e crianças escolares
(Universidade Federal de São Carlos, 2019-03-22)
Casali, Ivana Gisel
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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/7861631051569929
The literature points out the importance of social skills for the quality of interpersonal relationships, being learned, from a young age, in the interaction with other people. Children with an elaborate repertoire of social skills exhibit fewer behavioral problems and better academic performance, having more favorable perspectives in the future. When favorable, the educational practices of parents and teachers in the school and family environment are indicated as protective factors of the child development, minimizing or neutralizing risk factors. These practices should be based on a repertoire of general and educational social skills of these educational agents. However, there are still insufficient programs aimed at promoting this repertoire and, in particular, the systematic study of its impacts on the Brazilian population. Based on this, the present study had as main objective to evaluate a Social Skills Program for parents and teachers of school children, examining their effects: (1) direct, on the social repertoire of the agents education; and (2) indirect, on children in terms of social skills, behavioral problems and academic performance. After a pilot study, the program for teachers were conducted, with 18 sessions of 75 minutes in weekly frequency and the program for parents, with 17 sessions of 90 minutes, also weekly. Thirty parents, eight teachers and their children/students (N = 35) participated in four groups, one non-intervention control (CG) and three experimental groups: EG1, involving parents and teachers; EG2, teachers only; and EG3, only parents. The children's repertoire was evaluated through the Social Skills Assessment System (SSRS-BR2) and the School Performance Test (TDE); and parents e teachers was evaluated through the Social Skills Inventory (IHS-Del-Prette), Inventory of Educational Social Skills (IHSE-Parents and IHSE-Teachers) and the Parental Assessment Protocol (PAP). Statistical analyzes showed effects: (1) direct on the social repertoire of parents and teachers who participated in the sessions, when compared to the control group; and (2) indirectly on the repertoire of social skills and academic performance, greater for EG1 children, who benefited from the involvement of parents and teachers in the program. Among the teachers, there was a statistically significant change between pre and postintervention (cultivate affection, support and good mood) and a significant late effect in the follow-up in the global social skills score and in specific factors (self-defense assertiveness; affective-sexual assertiveness; reprove, restrict and correct behaviors). Among the parents, there were statistically significant differences between pre and post intervention in the global scores of social skills and educational social skills and in specific factors (assertiveness of social self-exposition; affective-sexual assertiveness; establish limits, correct and control; talk/dialogue). Finally, those children whose parents and teachers participated in the program (EG1) showed, after the intervention, a significant improvement in the overall score of self-rated social skills and academic performance and in specific indicators (assertiveness, assertiveness and social entrepreneurship; writing). The results suggest the effectiveness of the program and the importance of investing in the planning of interventions in the family and school environment as a way to contribute to the social-emotional development of schoolchildren, even as indirect targets of intervention. Programs that include triadic intervention, frequent in international research, and that advance the limitations pointed out in the present study could provide even more robust results in the area.
Obtenção de anticorpo monoclonal murino anti-cd25 através do cultivo do hibridoma pc-61 em biorreatores spinner em meio livre de soro
(Universidade Federal de São Carlos, 2019-03-22)
Damada, Pedro Henrique
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Suazo, Cláudio Alberto Torres
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https://lattes.cnpq.br/9591447226240450
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Anibal, Fernanda de Freitas
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https://lattes.cnpq.br/4918261968772806
Cancer is one of the deadliest diseases in the world. Its treatment includes surgical, chemotherapeutic and radiotherapeutic methods, which, although efficient, are expensive, long and can have several side effects to the patient. In order to seek new methodologies, immunotherapy, a treatment based on stimulation of the immune system to control cancer, has been one of the most interesting. One of the most used immunotherapeutic methods for this purpose is based on the use of monoclonal antibodies (mAbs), high specificity glycoproteins that are gaining space and arousing interest due to the positive results have already obtained for different diseases, such as multiple sclerosis and breast cancer. The objective of this work was to optimize the culture of PC-61 hybridomas in spinner flask for the production of the anti-CD25 mAb, with serum free commercial medium (SFM) and with RPMI medium supplemented with fetal bovine serum (FBS), used as control. Two modes of operation were used: batch and fed batch, in order to compare the results and propose a better methodology of cultivation. In addition, the purification of the antibodies was done using the techniques of ion exchange chromatography and immunoprecipitation with protein G in Sepharose. As a result, by batch culture, it was possible to identify the behavior of the cells and to stipulate the best conditions to carry out batch culture. Thus, it was possible to prolong the pre-stationary phase of the culture where a higher production of monoclonal antibody was observed. The SFM medium presented the best results compared to RPMI (with FBS) in batch culture, it was found that the production of mAbs in SFM was 3 times higher than in RPMI (with FBS). Furthermore, through these cultures, cells have been noted to direct their metabolism to produce the antibody when the nutrient level in the culture medium is reduced, and stress conditions (without causing cell death) can lead to increased production of antibody. In relation to purification, the immunoprecipitation technique with G protein proved to be very efficient, mainly for the separation of the antibodies present in the supernatant of the SFM culture, which has low protein content. Therefore, the use of the SFM medium is a great alternative to the culture media supplemented with FBS, since, in certain conditions, it allows the obtaining of larger amounts of antibody, and ensures greater ease in the application of purification techniques, reducing production costs.