Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-12-15T18:17:07Z No. of bitstreams: 1 RebeccaDeMouraDinizGomes_DISSERT.pdf: 2411622 bytes, checksum: 6b5e6ef2c6fd430fe0ff200b6352cd44 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-12-20T21:33:44Z (GMT) No. of bitstreams: 1 RebeccaDeMouraDinizGomes_DISSERT.pdf: 2411622 bytes, checksum: 6b5e6ef2c6fd430fe0ff200b6352cd44 (MD5) / Made available in DSpace on 2016-12-20T21:33:44Z (GMT). No. of bitstreams: 1 RebeccaDeMouraDinizGomes_DISSERT.pdf: 2411622 bytes, checksum: 6b5e6ef2c6fd430fe0ff200b6352cd44 (MD5) Previous issue date: 2016-05-27 / Grande tem sido o interesse nas difus?es an?malas, pois se apresentam nas mais diversas ?reas do conhecimento. A introdu??o de perfil de mem?ria no caminhante aleat?rio torna-o numa din?mica estoc?stica n?o-markoviana, cujas correla??es criam superdifus?o, persistencia e log-periodicidade. Apresentamos uma revis?o da literatura sobre os perfis de mem?ria e introduzimos nosso modelo. O modelo de mem?ria binomial pode selecionar diferentes regi?es de perda de mem?ria, desde a inicial at? a recente. Dessa forma, investigamos o impacto da posi??o da perda de mem?ria no comportamento superdifusivo do caminhante aleat?rio e unificamos muitos dos resultados da literatura. Obtivemos que mem?rias iniciais geram maior superdifus?o medidas pelo coeficiente de Hurst, enquanto que mem?rias recentes tendem a diminuir a superdifus?o, tornando mais caminhantes adeptos da difus?o normal. Tamb?m investigamos o regime de mem?ria curta inicial, com largura tendendo a zero. Observamos log-periodicidade para alguns caminhantes sugerindo regimes diferentes de comportamento log-periodico, incluindo aqueles considerados de difus?o normal. Uma particularidade do modelo binomial s?o os resutados extremamente sim?tricos para o diagrama Hxr. / Great has been the interest in anomalous diffusion because they are present in several areas of knowledge. The introduction of a memory profile in random walk environment give them a non-Markovian stochastic dynamics, whose temporal correlations may create superdiffusion, persistence and log-periodicity. We present an overview of memory profile literature and introduce our model. The binomial memory model can select different memory loss regions, from the old to the recent one. Thus, we investigate the impact of memory loss location on superdiffusive behavior of a random walker and unify some literature results. We verify that old memory generates higher superdiffusion measured by the Hurst coefficient, while recent memory tends to decrease superdiffusion, causing more walkers to undergo normal diffusion. We also investigate the short initial memory region, with zero tending standard deviation. We observe log-periodicity for some walkers suggesting different regions of log-periodic behavior, including those considered as normal diffusion. A particularity of the binomial model is an extremely symmetric result to Hxr diagram.

Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-02-22T19:05:05Z No. of bitstreams: 1 FelipeInacioXavierDeAzevedo_DISSERT.pdf: 3671312 bytes, checksum: a27a76a922a1b1d6062886edfad6516c (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-03-06T22:17:17Z (GMT) No. of bitstreams: 1 FelipeInacioXavierDeAzevedo_DISSERT.pdf: 3671312 bytes, checksum: a27a76a922a1b1d6062886edfad6516c (MD5) / Made available in DSpace on 2017-03-06T22:17:17Z (GMT). No. of bitstreams: 1 FelipeInacioXavierDeAzevedo_DISSERT.pdf: 3671312 bytes, checksum: a27a76a922a1b1d6062886edfad6516c (MD5) Previous issue date: 2016-08-19 / A queda acentuada dos n?veis de mortalidade e a melhoria na qualidade dos registros vitais no Brasil foram processos generalizados nas ?ltimas d?cadas, por?m, com importantes contrastes regionais. Estimativas de taxas espec?ficas de mortalidade, em algumas regi?es do pa?s, ainda representam um desafio para os dem?grafos. Dentre as limita??es destacam-se a alta variabilidade por idade nas taxas e a cobertura incompleta dos registros vitais. Os m?todos demogr?ficos para avalia??o e corre??o do subregistro de ?bitos nas primeiras idades possuem aplicabilidade limitada em popula??es subnacionais que experimentaram uma r?pida e intensa desestabiliza??o da sua estrutura et?ria, especialmente em n?veis geogr?ficos mais desagregados. Assim, o objetivo desse estudo ? propor estimativas indiretas para a mortalidade infanto-juvenil, de 0 a 14 anos, com base na mortalidade adulta estimada para as mesorregi?es do Brasil no dec?nio 2000/2010. As fontes de dados deste estudo s?o: Human Mortality Database (HMD), Censo 2010, Sistema de Informa??es sobre Mortalidade (SIM) e estimativas de mortalidade adulta para as mesorregi?es do Brasil. Duas propostas metodol?gicas foram empregadas, ambas utilizam modelos de regress?o que pressup?e a exist?ncia de uma forte rela??o da mortalidade na inf?ncia com a mortalidade adulta. Ambas as propostas, evidenciam padr?es de mortalidade com maiores n?veis de mortalidade infanto-juvenil nas mesorregi?es das regi?es Norte e Nordeste do pa?s. Os resultados apontam que as taxas de mortalidade estimadas segundo o modelo proposto por Wilmoth et al. apresentam, em geral, maior heterogeneidade entre as mesorregi?es de um mesmo estado, especialmente entre os homens. De um modo geral, os resultados obtidos apontam para n?veis mais baixos mortalidade feminina com padr?es mais homog?neos, em compara??o ? mortalidade masculina. Dentre os m?todos empregados, o modelo proposto por Wilmoth et al se mostra promissora para estimativas indiretas da mortalidade infanto-juvenil em ?reas com mais baixa qualidade dos registros vitais. / The sharp decline in mortality rates and improvement in the quality of vital records in Brazil were processes widespread in recent decades, but with significant regional contrasts. Estimates of specific mortality rates in some regions of the country still represent a challenge for demographers. Among the limitations, highlight the high variability in the rates by age and incomplete coverage of vital records. The demographic methods for evaluation and correction of underreporting of deaths at early ages have limited applicability in sub-populations that experienced a rapid and intense destabilization of its age structure, especially in more disaggregated geographical levels. Thus, the objective of this study is to propose indirect estimates for mortality infant-juvenile, 0-14 years, based on adult mortality estimated for the mesoregions of Brazil in the decade 2000/2010. The study data sources are: Human Mortality Database (HMD), Census 2010, Mortality Information System (SIM) and adult mortality estimates for mesoregions of Brazil. Two methodological approaches were employed, both using regression models which presupposes the existence of a strong relationship of infant mortality with adult mortality. Both proposals show mortality patterns with higher levels of mortality infant-juvenile in mesoregions the North and Northeast. The results show that mortality rates estimated by Proposal 2 show, in general, greater heterogeneity among mesoregions the same state, especially among men. Overall, the results point to lower female mortality levels with more homogeneous patterns compared to male mortality. Among the methods employed, the proposed 2 is shows promise for indirect estimates of mortality infant-juvenile in areas with lower quality of vital records.

A cossimulação de teores em depósitos multivariados complexos com mais de três variáveis envolvidas, quando realizada por métodos clássicos, é extremamente trabalhosa e acaba por gerar resultados que precisam de ajuste posterior, principalmente com relação ao fechamento da soma dos teores nos blocos ou faixas granulométricas de interesse. A necessidade de ajustes posteriores, aliada à falta de praticidade destes métodos, motiva a busca por soluções alternativas que gerem resultados tão ou mais precisos e, sejam mais facilmente implementáveis no dia a dia da indústria mineira. Nesta tese foi analisada a viabilidade de aplicação de cinco combinações de métodos como alternativa aos métodos clássicos: a simulação individual pelo método de bandas rotativas de cada uma das variáveis, em suporte de pontos posteriormente reblocados (combinação 1); a simulação das transformações ilrs, também pelo métodos de bandas rotativas, de forma individual e em suporte de pontos posteriormente reblocados (combinação 2); a simulação diretamente em suporte de blocos dos fatores MAFs (combinação 3); a simulação diretamente em suporte de blocos dos fatores MAFs das ilrs, com a utilização da variável artificial Resto, também utilizada nas combinações 1,2 e 3 (combinação 4) e; a simulação diretamente em suporte de blocos dos fatores MAFs das ilrs, com a operação de fechamento (combinação 5). Para aplicação da metodologia proposta foram simulados os teores das variáveis Alap, Fe, Si e Ti, retidas na faixa 14#, para um depósito de bauxita do norte do Brasil. Os resultados obtidos em todas as combinações foram analisados com relação ao grau de reprodução das características estatísticas e de continuidade espacial, reprodução das somas dos teores dos dados originais também na faixa simulada e a reprodução das correlações, ou reprodução da ausência de correlações, também nos cenários simulados. Após a análise dos resultados obtidos, se pode concluir que todas as combinações testadas são passíveis de utilização, no entanto, somente as combinações quatro e cinco proveem uma solução acabada para o problema em questão. Isto se deve ao fato de estas duas combinaões de métodos serem as únicas que combinaram: a decomposição MAF, para descorrelacionar as variáveis, simular cada uma de modo independente das demais e mesmo assim garantir a reprodução das correações no final do processo; a transformação ilr, que, por considerar as amostras como composições pertencentes ao espaço de soma restrita e constante, Simplex, garante que a soma dos teores esteja garantida nos resultados das simulações; e, a simulação diretamente em suporte de blocos, que foi incluída por evitar que um grande número de pontos precise ser simulado e posteriormente ajustado para o suporte de blocos, dando agilidade ao processo. A combinação cinco se mostrou ainda mais vantajosa por não fazer uso da variável artificial Resto, o que diminui o número de variáveis a serem efetivamente simuladas. Apesar das vantagens apontadas, é inegável que o usuário precisa conhecer e estar atento à sequência em que as transformações devem ser aplicadas sobre os dados originais. / Cossimulation of complex multivariate deposits with more than three variables involved, when performed by classical methods, is extremely labor intensive and ultimately generate results that need further adjustment, especially with respect to the closing of the sum of the attributes of interest. The need for further adjustments, together with the difficulties in practical implementation of these methods, motivates the search for alternative solutions that generate results as or more accurate and which can be more easily implementable at the mining industry. This thesis analyzed the feasibility of five combinations of methods as an alternative to the classical ones: individual simulation by turning bands method, each variable at a time, in subsequent block support adjustment (combination 1); the simulation of ILRs transformations, also using the turning bands method, individually and followed by the block support correction (combination 2); the directly block simulation of MAFs factors (combination 3); direct block simulation of MAFs factors of ILRs with the use of artificial variable “Resto” also used in combinations 1,2 and 3 (combination 4) and direct block simulation of MAFs factors of ILRs with the closing operation (combination 5). To apply the proposed methodology, the following variables from a large bauxite deposit were chosen: mass retained at 14 # sieve, Alap, Fe, Si and Ti were simulated. The results obtained in all combinations were analyzed with respect to the level of reproduction of statistical characteristics and spatial continuity, reproduction of the sums of the grades of the original data also in the simulated scenarios, allied to variables cross-correlation reproduction in the simulated scenarios. The results lead to conclude that all tested combinations are amenable to use, however, only the 4 and 5 combinations provide a finished solution to the problem in question. The MAF decomposition was used to decorrelate the variables and so each one of those could be independently simulated, and the maintenance of correlations after the procces was assured, and the ilr transformation was included in both combinations 4 and 5 to provide results with constant sums of the grades in the sieve of interest. These two combinations guarantee the maintenance of the grades closed sum and correlations reproduction in simulated scenarios, and, still are computationally efficient as the block simulation was used to avoid the simulation of a large amount of points that need to be post processed. The last workflow proved to be even more advantageous for not using an artificial variable Resto, which reduces the number of variables to be effectively simulated. Despite of these advantages, it is undeniable that the user needs to know and to be aware of the sequence in which transformation should be applied to the original data.

abstract: Students' ability to regulate and control their behaviors during learning has been shown to be a critical skill for academic success. However, researchers often struggle with ways to capture the nuances of this ability, often solely relying on self-report measures. This thesis proposal employs a novel approach to investigating variations in students' ability to self-regulate by using process data from the game-based Intelligent Tutoring System (ITS) iSTART-ME. This approach affords a nuanced examination of how students' regulate their interactions with game-based features at both a coarse-grained and fine-grain levels and the ultimate impact that those behaviors have on in-system performance and learning outcomes (i.e., self-explanation quality). This thesis is comprised of two submitted manuscripts that examined how a group of 40 high school students chose to engage with game-based features and how those interactions influenced their target skill performance. Findings suggest that in-system log data has the potential to provide stealth assessments of students' self-regulation while learning. / Dissertation/Thesis / M.A. Psychology 2014

Digital front-end and Turbo decoder are the two key components in the digital wireless communication system. This thesis will discuss the implementation issues of both digital front-end and Turbo decoder.The structure of digital front-end for multi-standard radio supporting wireless standards such as IEEE802.11n, WiMAX, 3GPP LTE is investigated in the thesis. A top-to-down design methods. 802.11n digital down-converter is designed from Matlab model to VHDL implementation. Both simulation and FPGA prototyping are carried out.As another significant part of the thesis, a parallel Turbo decoder is designed and implemented for 3GPPLTE. The block size supported ranges from 40 to 6144 and the maximum number of iteration is eight.The Turbo decoder will use eight parallel SISO units to reach a throughput up to 150Mits.

Abstract This study focuses on the process of self-regulated learning by investigating in detail how learners engage in self-regulated and strategic learning when studying in g/nStudy learning environments. The study uses trace methods to enable recognition of temporal patterns in learners’ activity that can signal strategic and self-regulated learning. The study comprises three data sets. In each data set, g/nStudy technology was used to support and trace self-regulated learning. In the analysis, micro-analytical protocols along with qualitative approach were favoured to better understand the process of self-regulated and strategic learning in authentic classroom settings. The results suggested that the specific technological tools used to support strategic and self-regulated learning can also be used methodologically to investigate patterns emerging from students’ cognitive regulation activity. The advantage of designing specific tools to trace and support self-regulated learning also helps to interpret the way in which the learning patterns actually inform SRL theoretically and empirically. Depending on how the tools are used, they can signal the typical patterns existing in the learning processes of students or student groups. The learning patterns found in the students’ cognitive regulation activity varied in terms of how often the patterns emerged in their learning, how the patterns were composed and when the patterns were used. Moreover, there were intra-individual differences – firstly, in how students with different learning outcomes allocated their study tactic use, and secondly, how self-regulated learning was used in challenging learning situations perceived by students. These findings indicate log file traces can reveal differences in self-regulated learning between individuals and between groups of learners with similar characteristics based on the learning patterns they used. However, learning patterns obtained from log file traces can sometimes be complex rather than simple. Therefore, log file traces need to be combined with other situation-specific measurements to better understand how they might elucidate self-regulated learning in the learning context. / Tiivistelmä Tässä väitöskirjassa tutkitaan oppilaiden itsesäätöisen ja strategisen oppimisen ilmenemistä oppimisprosessin aikana. Tutkimuksessa hyödynnetään g/nStudy- oppimisympäristöä, jonka avulla on mahdollista tukea ja jäljittää oppimisen strategista toimintaa. g/nStudy-oppimisympäristö tallentaa lokidataa, joka on tarkkaa ajallista informaatiota siitä toiminnasta, jota oppilas tekee työskentelynsä aikana. Toisin sanoen, lokidatasta on mahdollista jäljittää ne tiedot, jotka reflektoivat strategista – ja itsesäätöistä oppimista. Erityisenä mielenkiinnon kohteena oli selvittää miten lokidatasta voi löytää strategisia oppimisen toimintamalleja, ja miten nämä strategiset oppimisen toimintamallit vaihtelevat oppilaiden, oppilasryhmien ja erilaisten oppimisen tilanteiden aikana. Väitöstutkimus muodostuu kolmesta erillisestä tutkimusaineistosta. Jokaisessa kolmessa aineistossa on hyödynnetty g/nStudy-teknologian mahdollisuuksia tukea ja jäljittää itsesäätöistä oppimista. Tutkimusaineiston analyysissä hyödynnetään mikroanalyyttista lähestymistapaa sekä laadullista tutkimusotetta. Tutkimuksen analyyttinen lähestymistapa antaa mahdollisuuden ymmärtää itsesäätöisen- ja strategisen oppimisen ilmenemistä aidossa oppimistilanteessa. Tutkimustulokset osoittavat, että oppimisympäristöön sisällytettyjä teknologisia työkaluja voidaan käyttää tukemaan itsesäätöistä ja strategista toimintaa. Sen lisäksi samoja työkaluja voidaan käyttää myös menetelmällisenä välineenä tutkittaessa itsesäätöistä – ja strategista toimintaa erilaisissa oppimistilanteissa. Tutkimus -tulokset osoittavat, että oppimisen strategiset toimintamallit vaihtelivat oppilaiden – ja oppimistilanteiden välillä. Oppimisen strategisissa toimintamalleissa oli myös laadullisia eroja sen suhteen, miten usein ne ilmenivät oppimisprosessin aikana ja mistä strategisista toiminnoista ne koostuivat. Johtopäätöksenä voi todeta, että lokidatan käyttäminen tutkimusmenetelmänä edesauttaa paljastamaan opiskelun strategisia toimintamalleja oppilaiden – ja oppilasryhmien välillä. Tutkimuksen perusteella voidaan todeta, että strategiset toimintamallit voivat olla hyvinkin monimuotoisia. On tärkeää tunnistaa, missä tilanteissa ja milloin näitä toimintamalleja käytetään ja erityisesti mikä on niiden vaikutus oppimisen laatuun.

Policy goals stipulated by the Ministry of Education of the post-colonial government of Malawi advocate music education and inclusion of indigenous music in education. In spite of such stipulations, music education is non-practical and the integration of indigenous music in education is unsatisfactory. This thesis attempts to address these issues while focusing on the meaning and purpose of music to Malawians. The thesis begins by tracing the history of music in classroom education in Malawi from 1875 to the present with an attempt to investigate the factors that have contributed to the current crisis in music in schools. This historical-ethnographic study sets out to demonstrate that the ideals and practices of foreign religions as well as Western education denied indigenous music of Malawians a place in classroom education as well as inside and outside the church or the mosque. The thesis strives to portray the consequences of this denial on issues of purpose, outcome, content, methodology and support for music education; trends in indigenous music in ethnic societies; policy goals and statements of music education in the Malawian education; and attitude towards music and music education. Adopting the approaches of both musicology and ethnomusicology, the thesis discusses the role played by indigenous music in ethnic societies and the rationalised views of this music as provided by the musically informed native Malawian practitioners. This discussion further demonstrates how indigenous music structures reflect the social realities of Malawians such as the sharing of resources and theories of life. The thesis argues musical issues that would be the basis for remedying the crisis in music education. A philosophical proposition for modern music education, and the significance of indigenous music in classroom education are argued. An introduction to music education that promotes the use of indigenous music in study and performance is suggested. Sources relied on in the thesis include published and unpublished studies of music and music education; audio/video recordings; and field research undertaken to obtain information about existing indigenous music and their knowledge systems known in Malawian ethnic societies, but not yet covered by existing publications. / Thesis (DMus)--University of Pretoria, 2006. / Music / unrestricted

In my final thesis I focus on process and implementation of project procedure. The main aim of this thesis is to show possibilities of how to work with projects in the nonprofit field of educational resort. The opening part is a summary of six chapters. I tried to summarize my own, as well as other theoretical knowledge and basic information concerning the branch of the project procedure, which are important for the following practical part of the thesis. I deal with individual phases of the project procedure, in which I explain terms such as project framework, the lifecycle of project, evaluation methods of projects, the use of information technology, risks that might appear in project procedure etc. Further in my thesis, which is very important, I focus on possibilities of project fundraising in schools. I present basic information about The European Business Academy in Decin, where I am employed. I also deal with options that teachers and students have to extend their education abroad, so called "the mobility of students and teachers". The main part of my thesis includes projects which are being prepared at The European Business Academy in Decin. As an example, I enclose a project which was conducted by students together with teachers and its implementation into use. The second project is a project objective which was not implemented. The third project is being processed and the fourth one has been approved. Another aim of my thesis is to show to other schools how to work with projects and give them a guideline how to involve not only teachers or other employees but also students. Since 2010 students of the final grade will create team projects and the process and defence of the project will be included in the final school-leaving examination.

Secure mobile apps, including end-to-end encrypted messaging apps such as Whats-App and Signal, are increasingly popular today. These apps require trust in a centralized key directory to automatically exchange the public keys used to secure user communication. This trust may be abused by malicious, subpoenaed, or compromised directories. A public key infrastructure (PKI) solution that requires less trust would increase the security of these commonly used apps.CONIKS is a recent PKI proposal that features transparent key directories which publish auditable digests of the public keys they present to queriers. By monitoring its key every time a new digest is published, a client can verify that its key is published correctly, reducing the need to trust the directory. CONIKS features improved security at the cost of unique auditing and monitoring requirements. In this thesis, we examine CONIKS' suitability as a PKI solution for secure mobile apps. We present a threat analysis of possible attacks on the CONIKS protocol and explore several important implications of CONIKS' system description, including recommendations for whistleblowing and key change policies. We also analyze mobile device usage data to estimate whether typical mobile device Internet connectivity is sufficient to fulfill CONIKS' monitoring requirement.

Softwérové a hardvérové aplikácie zaznamenávajú veľké množstvo informácií do protokolov udalostí. Každé dva roky sa množstvo zaznamenaných dát viac než zdvojnásobí. Dolovanie procesov je relatívne mladá disciplína, ktorá sa nachádza na rozmedzí strojového učenia a dolovania dát na jednej strane a modelovania a analýzy procesov na druhej strane. Cieľom dolovania procesov je popísať a analyzovať skutočné procesy extrahovaním znalostí z protokolov udalostí, ktoré sú v dnešných aplikáciách bežne dostupné. Táto práca mieri na spojenie obchodných príležitostí (organizácie bohaté na dáta; dopyt po službách BPM; limitácie na strane tradičnej dodávky BPM služieb) s technickými možnosťammi Dolovania procesov. Cieľom práce je návrh produktu, ktorý bude riešiť potreby zákazníkov a poskytovateľov služieb v oblasti Dolovania procesov lepšie než súčasné riešenie vybranej spoločnosti.