Submitted by Marcos Samuel (msamjunior@gmail.com) on 2017-06-20T14:12:08Z No. of bitstreams: 1 DissertacaoFabiano.pdf: 7605298 bytes, checksum: 89e8628a190bd9aae669b871a4d5100f (MD5) / Approved for entry into archive by Vanessa Reis (vanessa.jamile@ufba.br) on 2017-06-29T11:36:49Z (GMT) No. of bitstreams: 1 DissertacaoFabiano.pdf: 7605298 bytes, checksum: 89e8628a190bd9aae669b871a4d5100f (MD5) / Made available in DSpace on 2017-06-29T11:36:49Z (GMT). No. of bitstreams: 1 DissertacaoFabiano.pdf: 7605298 bytes, checksum: 89e8628a190bd9aae669b871a4d5100f (MD5) / O presente trabalho é fruto da necessidade de desenvolver metodologias para o estudo da Matemática que promova a formação de cidadãos independentes, capazes de inovar e aprender continuamente. Sendo assim foi desenvolvida uma proposta pedagógica composta por atividades exploratória e investigativa que conduzem o aluno a construir seu conhecimento e o professor assumi assim o papel de condutor e facilitador desse processo. Devido ao grande número de aplicações relevante a vida contemporânea, foi selecionado o conteúdo de funções quadrática, focando em sua representação gráfica. As atividades propostas instiga os alunos a observar a parábola e a utilizar o software Geo Gebra para explorar suas propriedades e investigar as relação entre sua representação gráfica com sua equação. Propõe-se também a introdução do estudo das cônicas, dando enfase a parábola, explorando sua propriedade refletora que justifica algumas de suas aplicações praticas.

Submitted by Corso Pereira Gilberto (corso@ufba.br) on 2013-01-11T12:29:59Z No. of bitstreams: 1 Arquivo único 4.pdf: 21073520 bytes, checksum: 7bcf42f30fb8ef762b76342f9f2cf5a8 (MD5) / Made available in DSpace on 2013-01-11T12:29:59Z (GMT). No. of bitstreams: 1 Arquivo único 4.pdf: 21073520 bytes, checksum: 7bcf42f30fb8ef762b76342f9f2cf5a8 (MD5) / CAPES/DINTER / A historiografia paraibana aponta no sentido de que a produção inicial do espaço, ao norte da capitania de Itamaracá, deveria ter ocorrido na desembocadura do Rio Paraíba, em ambiente de morfologia plana e baixa, de constituição areno-lamosa e desprovido de água potável. Em momento posterior, provavelmente por razões de ordem ambiental, o primeiro assentamento humano se estabeleceria a montante do estuário, em área diferente daquela inicialmente estabelecida nas determinações reais. O novo sítio se caracterizava por apresentar topografia elevada, pela existência de um porto com bom calado e ao abrigo dos ventos, pela presença de rochas calcárias e pela abundância de regatos e fontes de água potável. Essas singularidades do meio físico atendiam às necessidade imediatas para implantação de um núcleo populacional na época colonial, constituindo um bom "sítio" e em área de boa "situação" geográfica. O objetivo desta pesquisa é estudar as características do meio físico desse sítio, local onde foi fundada a cidade de Nossa Senhora das Neves, atual cidade de João Pessoa - PB. Para tanto, se utilizou o método analógico-dedutivo e como metodologia de pesquisa, levantamento bibliográfico e documental, elaboração de cartas, trabalho de campo e análise comparativa das informações geológicas. O estudo contribuiu para a compreensão da fisiologia do meio natural e das características geológicas, geomorfológicas e hidrológicas do antigo sítio onde foi fundada a cidade de Nossa Senhora das Neves. O entendimento da existência de uma falha geológica perpassando os limites entre a Cidade Alta e a Cidade Baixa explica as singularidades do sítio e responde pela grande quantidade de calcários aflorantes e fontes de água potável existentes nas encostas do morro. É no entorno desta elevação, com cota topográfica entre 16 e 18 metros, que se posicionam as seis principais fontes que abasteceram a cidade por cerca de 350 anos, que são: a Bica da Maria Feia, a Cacimba do Povo, a fonte dos Milagres, a fonte do Gravatá, a fonte de Tambiá e a fonte de Santo Antonio. / Salvador

Submitted by Francisco Costa (xcosta@ufba.br) on 2013-07-17T16:32:21Z No. of bitstreams: 1 Arquivo único 4 - alterações a partir das contribuições do.pdf: 21081070 bytes, checksum: 64ffe5c1049ef9e976c6993cde1d40d6 (MD5) / Approved for entry into archive by Edilene Costa(ec@ufba.br) on 2013-07-25T22:00:22Z (GMT) No. of bitstreams: 1 Arquivo único 4 - alterações a partir das contribuições do.pdf: 21081070 bytes, checksum: 64ffe5c1049ef9e976c6993cde1d40d6 (MD5) / Made available in DSpace on 2013-07-25T22:00:22Z (GMT). No. of bitstreams: 1 Arquivo único 4 - alterações a partir das contribuições do.pdf: 21081070 bytes, checksum: 64ffe5c1049ef9e976c6993cde1d40d6 (MD5) / A historiografia paraibana aponta no sentido de que a produção inicial do espaço, ao norte da capitania de Itamaracá, deveria ter ocorrido na desembocadura do Rio Paraíba, em ambiente de morfologia plana e baixa, de constituição areno-lamosa e desprovido de água potável. Em momento posterior, provavelmente por razões de ordem ambiental, o primeiro assentamento humano se estabeleceria a montante do estuário, em área diferente daquela inicialmente estabelecida nas determinações reais. O novo sítio se caracterizava por apresentar topografia elevada, pela existência de um porto com bom calado e ao abrigo dos ventos, pela presença de rochas calcárias e pela abundância de regatos e fontes de água potável. Essas singularidades do meio físico atendiam às necessidade imediatas para implantação de um núcleo populacional na época colonial, constituindo um bom "sítio" e em área de boa "situação" geográfica. O objetivo desta pesquisa é estudar as características do meio físico desse sítio, local onde foi fundada a cidade de Nossa Senhora das Neves, atual cidade de João Pessoa - PB. Para tanto, se utilizou o método analógico-dedutivo e como metodologia de pesquisa, levantamento bibliográfico e documental, elaboração de cartas, trabalho de campo e análise comparativa das informações geológicas. O estudo contribuiu para a compreensão da fisiologia do meio natural e das características geológicas, geomorfológicas e hidrológicas do antigo sítio onde foi fundada a cidade de Nossa Senhora das Neves. O entendimento da existência de uma falha geológica perpassando os limites entre a Cidade Alta e a Cidade Baixa explica as singularidades do sítio e responde pela grande quantidade de calcários aflorantes e fontes de água potável existentes nas encostas do morro. É no entorno desta elevação, com cota topográfica entre 16 e 18 metros, que se posicionam as seis principais fontes que abasteceram a cidade por cerca de 350 anos, que são: a Bica da Maria Feia, a Cacimba do Povo, a fonte dos Milagres, a fonte do Gravatá, a fonte de Tambiá e a fonte de Santo Antonio. / Salvador

During the past decade, the Internet has witnessed a dramatic increase in the popularity of Peer-to-Peer (P2P) applications. This has caused a significant growth in the volume of P2P traffic. This trend has been particularly alarming for the Internet Service Providers (ISPs) that need to cope with the associated cost but have limited control in routing or managing P2P traffic. To alleviate this problem, researchers have proposed mechanisms to reduce the volume of external P2P traffic for individual ISPs. However, prior studies have not examined the global effect of P2P applications on the entire network, namely the traffic that a P2P application imposes on individual underlying Autonomous Systems (ASs). Such a global view is particularly important because of the large number of geographically scattered peers in P2P applications. This dissertation examines the global effect of P2P applications on the underlying AS-level Internet. Toward this end, first we leverage a large number of complete overlay snapshots from a large-scale P2P application, namely Gnutella, to characterize the connectivity and evolution of its overlay structure. We also conduct a case study on the performance of BitTorrent and its correlation with peer- and group-level properties. Second, we present and evaluate Respondent-driven sampling as a promising technique to collect unbiased samples for characterizing peer properties in large-scale P2P overlays without requiring the overlay's complete snapshot. Third, we propose a new technique leveraging the geographical location of peers in an AS to determine its geographical footprint and identify the cities where its Points-of-Presence (PoPs) are likely to be located. Fourth, we present a new methodology to characterize the effect of a given P2P overlay on the underlying ASs. Our approach relies on the large scale simulation of BGP routing over the AS-level snapshots of the Internet to identify the imposed load on each transit AS. Using our methodology, we characterize the impact of Gnutella overlay on the AS-level underlay over a 4-year period. Our investigation provides valuable insights on the global impact of large scale P2P overlay on individual ASs. This dissertation includes my previously published and co-authored material.

Submitted by Luiza Kleinubing (luiza.kleinubing@udesc.br) on 2018-03-08T16:24:26Z No. of bitstreams: 1 CARLA LUCIANE THUNS.pdf: 1643599 bytes, checksum: 3599d1d53a36e8a9e0ad36f31c83c293 (MD5) / Made available in DSpace on 2018-03-08T16:24:26Z (GMT). No. of bitstreams: 1 CARLA LUCIANE THUNS.pdf: 1643599 bytes, checksum: 3599d1d53a36e8a9e0ad36f31c83c293 (MD5) Previous issue date: 2016-06-07 / Programa de Bolsas de Monitoria de Pós-Graduação - PROMOP / The process of globalization of technological innovation generated deep changes in contemporary society and at the world of work. Be informationally competent is crucial in all areas of knowledge and professional contexts. With this understanding, the present study aimed to investigate the knowledge of Information Literacy by professionals instructors who work at Corporate Education Service (SEDUC) of Santa Catarina Regional Labor Court (TRT-SC) and utilize the modality of Distance Education (EaD) in the training process of their servers. For this challenge, was necessary to identify if professionals/ instructors who work at Corporate Education Service (SEDUC) of Santa Catarina Regional Labor Court (TRT-SC) and that utilize the modality of Distance Education (EaD) are familiar with the concepts and characteristics of Information Literacy; reflect on the interfaces between Corporative Education, Distance Education, Information Literacy and Professional Qualification and identify the activities developed by professionals/instructors who work at the Corporate Education Service (SEDUC) of Santa Catarina Regional Labor Court (TRT-SC) and that utilize the modality of Distance Education (EaD) in relation to the basic principles of Information Literacy. The methodology used began from a qualitative and quantitative approach and we analyzed the data from indicative of the content analysis. Among the main outcomes, highlights the understanding that the Information Literacy goes beyond the sphere of Librarianship and Information Science and easily finds its place in the Corporative Education, since the skills are present in the human being and may be used in all the working areas of professionals who deals with information. It also points out the need for the TRT-SC in their servers' training process may add discussions of Information Literacy as a way to qualify even more the services offered. / O processo de globalização das inovações tecnológicas gerou profundas transformações na sociedade contemporânea e no mundo do trabalho. Ser competente informacionalmente é fundamental em todas as áreas de conhecimento e contextos profissionais. Com esta compreensão a presente pesquisa objetivou investigar o (re)conhecimento da Competência Informacional por parte dos profissionais instrutores que atuam no Serviço de Educação Corporativa (SEDUC) do Tribunal Regional do Trabalho de Santa Catarina (TRT-SC) e que utilizam a modalidade de Educação a Distância (EaD) no processo de capacitação de seus servidores. Para tal desafio foi necessário, identificar se os profissionais instrutores que atuam no Serviço de Educação Corporativa (SEDUC) do Tribunal Regional do Trabalho de Santa Catarina (TRT-SC) e que utilizam a modalidade de Educação a Distância (EaD) estão familiarizados com os conceitos e as características da Competência Informacional; refletir sobre as interfaces entre Educação Corporativa, Educação a Distância, Competência Informacional e Capacitação Profissional e identificar as atividades desenvolvidas pelos profissionais instrutores que atuam no Serviço de Educação Corporativa (SEDUC) do Tribunal Regional do Trabalho de Santa Catarina (TRT-SC) e que utilizam a modalidade de Educação a Distância (EaD), na relação com os princípios básicos da Competência Informacional. A metodologia utilizada partiu de uma abordagem quali-quantitativa sendo que os dados foram analisados a partir de indicativos da Análise de Conteúdo. Entre os principais resultados destaca-se a compreensão de que a Competência Informacional ultrapassa a esfera da Biblioteconomia e da Ciência da Informação e facilmente encontra lugar na Educação Corporativa, uma vez que as competências estão presentes no ser humano, podendo ser empregada em todas as áreas de atuação dos profissionais que lidam com a informação. Aponta-se também, a necessidade de o TRT-SC, em seu processo de capacitação de servidores, acrescentar as discussões da Competência Informacional como forma de qualificar ainda mais os serviços oferecidos.

The emergency services in neighboring Jämtland, Sweden and Nord-Sør Trøndelag, Norway have identified a need to share data across department, municipality and country borders. A project is started to evaluate the possibility of sharing information through a common Web Geographic Information System (GIS). The data about resources at the various departments suffers from a high level of heterogeneity, fragmentation and protocol incompatibility. The Open Geo-Spatial Consortium (OGC) issue Web standards to harmonize the processing of geo-spatial data and promote interoperability between GIS systems. A test model based on the Thin Thread Model, emulating a potential final solution, is built to evaluate the usability of these Web standards in the situation. Successful test cases including CRUD operations and relatively smooth swapping of layer modules show that using well-established standards can be beneficial. A proposed architecture extending the test model presents the idea of a centralized proxy node and a meta data catalog. The study highlights the issue of responsibility and question of which authority should maintain centralized nodes. In order to successfully implement a Web portal, the project participants must from a technical point of view investigate how to access all desired data, agree on protocols for communication and ensure that each owner of data provides an API in agreement with the protocol. The OGC Web standards are proven a good option and focal point.

In recent years, increasing attentions are paid on developing exceptional technologies for efficiently processing massive collection of heterogeneous data generated by different kinds of sensors. While we have observed great successes of utilizing big data in many innovative applications, the need on integrating information poses new challenges caused by the heterogeneity of the data. In this thesis, we target at geo-tagged data, and propose a cloud based platform named City Digital Pulse (CDP), where a unified mechanism and extensible architecture are provided to facilitate the various aspects in big data analysis, ranging from data acquisition to data visualization. We instantiate the proposed system using multi-model data collected from two social platforms, Twitter and Instagram, which include plenty of geo-tagged messages. Data analysis is performed to detect human affections from the user uploaded content. The emotional information in big social data can be uncovered by using a multi-dimension visualization interface, based on which users can easily grasp the evolving of human affective status within a given geographical area, and interact with the system. This offers costless opportunities to improve the decision making in many critical areas. Both the proposed architecture and algorithm are empirically demonstrated to be able to achieve real-time big data analysis.

This thesis consists of three essays on the determinants of and returns to volunteering. The first essay, ‘volunteer opportunities and volunteering’ examines the relationship between physical access to charitable organizations and volunteering. Formal volunteer activities usually take place within a charitable or non-profit organization. While the physical presence of these organizations is required for citizens who want to contribute to their communities, the availability of charitable organizations (number and type) varies from neighbourhood to neighbourhood. Until now, no one has examined the role played by charity proximity on volunteer decisions. In this paper I use information on the location of registered charities in Canada (from the CRA T3010 registered charity returns) merged with survey information on volunteering (from General Social Surveys conducted by Statistics Canada) to examine how physical access affects volunteer behaviour. Careful attention is paid to the possibility that the measure of access might be endogenous: organizations and individuals may respond to the same unobservable factors when deciding where to locate. Various strategies including an instrumental variables procedure are undertaken to deal with this possibility. My results suggest that access does matter for the decision to volunteer as well as for the amount of time devoted to volunteering. My estimates imply that increasing the number of charitable organizations within a one-kilometre buffer around an individual’s place of residence by 6% (the growth rate of the number charities in Canada (between 2003 to 2009), increases the predicted probability of volunteering by 5%. The second essay, ‘the returns to working for free’ examines the relationship between volunteering and income. Previous studies have shown volunteering to be associated with an earnings premium, but many of these studies fail to take into account the possible endogeneity between volunteering and income. Using data from the General Social Surveys (2003, 2005, 2008, 2010 and 2013), I investigate the causal relationship between volunteering and income. I employ a novel instrument, a measure of access to charitable organizations around an individual’s place of residence, along with more conventional ones, like membership or participation in different groups or organizations, to examine this relationship and try to understand how volunteering might affect earned income. Identifying the effect of volunteering of the different subgroups affected by the different instruments provides a (surprisingly) large range of estimates. For example estimates in the upper range found in the literature (53%) are found for individuals who are induced to volunteer because of their membership or participation in sport or recreational organizations, no returns are found for those induced to volunteer because of their membership or participation in school or civic groups, negative returns (22%) are found for those induced to volunteer because of their membership or participation in religious affiliated groups and very large (47%), but imprecise estimates are found for those induced to volunteer because of proximity to charitable organizations. The third essay, ‘doing good, feeling good: causal evidence from Canadian volunteers’ examines the relationships between volunteering and health, and volunteering and life satisfaction. A literature suggests that volunteers are healthier and happier than their non-volunteering counterparts. But this ‘observation’ is fraught with problems of endogeneity. Some papers have addressed the endogeneity problem with an instrumental variable technique; mostly relying on measures of ‘religiosity’ as instruments. However, no studies of such nature have been conducted in Canada. Using data from the General Social Surveys, I again employ the measure of physical access to charitable organizations within a three-kilometer radius of an individual’s place of residence as the main identifying instrument to examine the causal relationship between volunteering, health and life satisfaction for individuals aged 15 years old and over. Employing a conditional mixed process (CMP) to estimate the model, I conclude that volunteering is a significant predictor of health, and it has a statistically significant effect on life satisfaction for female and middle-aged individuals.

GSHP (Ground source heat pump), uses geothermal energy which is a form of green and sustainable energy.  Geothermal energy is also a continuous source of energy, unlike wind energy. The results from this thesis work will be applicable for both GSHP that are being used for space heating, and the ones which have a bottom organic Rankine cycle. The bottom organic Rankine cycle and continuous energy production of GSHP make it a potential source for electricity generation.  The GSHP is of various types, in regard to the configuration of the pipe and their setup in the ground and also based on their grouting. In this study only vertical GSHP and with a single u-tube and water filled grout will be analyzed. The GSHP performance is based on a number of parameters including, the depth of the heat exchanging unit in the ground, other key dimensions of the unit like diameter and outer wall thickness, the fluid flow, and the type of working fluid. Therefore it becomes necessary to study the effect of all of these parameters individually and their individual effect on the energy output and the performance of the BHE. One of the thesis objectives is to establish a sensitivity analysis of the BHE based on the above mention parameters and then further optimize the design with the heat enhancement devices. The major findings of this thesis work are how shank spacing (spacing between the inlet and the outlet pipe) affects the heat transfer in the BHE. The shank spacing seems to reduce the energy output of the GSHP, this is contrary to the high conductive solid grout, where the shank spacing doesn't affect the BHE so much. The diameter of the BHE in the water-filled grout has a completely opposite effect from the solid grout. Increasing the depth of the BHE after a certain length only increases the entropy of the system which reduces the energy output. The working fluid with a higher Prandtl number helps in higher energy output. The optimization results suggest that having a deeper borehole is not very energy efficient in spite of the greater thermal gradient available at a higher depth.

>Magister Scientiae - MSc / This research objectively investigates the e ectiveness of machine learning (ML) tools towards predicting several geo-physical parameters. This is based on a large number of studies that have reported high levels of prediction success using ML in the eld. Therefore, several widely used ML tools coupled with a number of di erent feature sets are used to predict six geophysical parameters namely rainfall, groundwater, evapora- tion, humidity, temperature, and wind. The results of the research indicate that: a) a large number of related studies in the eld are prone to speci c pitfalls that lead to over-estimated results in favour of ML tools; b) the use of gaussian mixture models as global features can provide a higher accuracy compared to other local feature sets; c) ML never outperform simple statistically-based estimators on highly-seasonal parame- ters, and providing error bars is key to objectively evaluating the relative performance of the ML tools used; and d) ML tools can be e ective for parameters that are slow- changing such as groundwater.