Syftet med detta examensarbete är att undersöka vilka undervisningsmetoder som används av verksamma svensklärare i grundskolans klassrum för att utveckla elevernas läsförståelse i ämnet svenska men också hur och varför lärarna använder just dessa metoder. Denna undersökning bygger på svar inkomna från utskickade frågeformulär. Dessa frågeformulär bestod av tio frågor som besvarades av fyra verksamma lärare runt om i Sverige. Examensarbetet utgår från det sociokulturella perspektivet där diskussion och interaktion i par, samt stöttning, är centrala delar. Denna studies analysdel har använt en tematisk analys som resulterat i olika huvudteman. De tre huvudteman som behandlas är följande: cirkelmodellen, kooperativa strategier och stöttning. I dessa teman framkommer det att lärare använder sig av en mängd olika metoder i undervisningen med läsförståelse. Dessa metoder innehåller mycket elevaktiva övningar där eleverna gemensamt med läraren utvecklar sin läsförståelse inom ämnet svenska. I resultatet framkommer det även hur lärarna använder dessa metoder. / The purpose of this degree project is to investigate which teaching methods are used by Swedish teachers in primary school classrooms to develop the students' reading comprehension in the subject of Swedish, but also how and why the teachers use these particular methods. This survey is based on responses received from questionnaires sent out (see appendix 2). These questionnaires consisted of ten questions and were sent out to four active teachers around Sweden. The degree project is based on the socio-cultural perspective where discussion and interaction in pairs, as well as support, are central parts. The analysis part of this study has used a thematic analysis which resulted in different main themes. The main themes covered are the following: The circle model, Cooperative strategies and adaptations. In these themes, it appears that teachers use a variety of methods in teaching reading comprehension. These methods contain student-active exercises where the students develop their reading comprehension together with the teacher. The results section also shows how the teachers use these methods.

<p>Building on concepts of the pastoral, the picturesque, the “vernacular ruin,” and frontierism in an American context, this thesis explores the interest in ruin and commodity-oriented refuse within rural, wilderness, and what Leo Marx in <em>The Machine in the Garden</em> calls “middle ground” environments. Chapter one analyzes how “nature” has been conceptualized as a place where human-made objects become repurposed through the gaze of the spectator. Theories surrounding gallery and exhibition space, as well as archaeological practices related to garbage excavation, are assessed to determine how waste objects, when wrested out of context, become artifacts of cultural significance. Chapter two turns to focus on the settler experience of the frontier in order to locate a uniquely American evolution of the interest in everyday waste objects. Chapters three and four return to the rural and the pastoral to focus on Marx’s concept of the “middle ground.” In dialogue with Marx’s theories, I propose a definition of the “neopastoral” as that which evolves from the interjection of domestic waste into these middle spaces to the aesthetic appropriation of everyday, common objects in modernist American poetry. The final chapter focuses on selected poems by modernist writers such as Wallace Stevens, Robert Frost, and W.C. Williams to analyze their explicit references to everyday waste in conjunction with the mythologized American pastoral. These poets provide evidence for how the drive to poeticize an abandoned, human-made object’s proximity to a natural environment plays a significant role in the perception of the fragmented object-subject relationship in modernity.</p> / Doctor of Philosophy (PhD)

This thesis aims at an automatic detection of artifacts in optical satellite images such as aliasing, A/D conversion problems, striping, and compression noise; in fact, all blemishes that are unusual in an undistorted image. Artifact detection in Earth observation images becomes increasingly difficult when the resolution of the image improves. For images of low, medium or high resolution, the artifact signatures are sufficiently different from the useful signal, thus allowing their characterization as distortions; however, when the resolution improves, the artifacts have, in terms of signal theory, a similar signature to the interesting objects in an image. Although it is more difficult to detect artifacts in very high resolution images, we need analysis tools that work properly, without impeding the extraction of objects in an image. Furthermore, the detection should be as automatic as possible, given the quantity and ever-increasing volumes of images that make any manual detection illusory. Finally, experience shows that artifacts are not all predictable nor can they be modeled as expected. Thus, any artifact detection shall be as generic as possible, without requiring the modeling of their origin or their impact on an image. Outside the field of Earth observation, similar detection problems have arisen in multimedia image processing. This includes the evaluation of image quality, compression, watermarking, detecting attacks, image tampering, the montage of photographs, steganalysis, etc. In general, the techniques used to address these problems are based on direct or indirect measurement of intrinsic information and mutual information. Therefore, this thesis has the objective to translate these approaches to artifact detection in Earth observation images, based particularly on the theories of Shannon and Kolmogorov, including approaches for measuring rate-distortion and pattern-recognition based compression. The results from these theories are then used to detect too low or too high complexities, or redundant patterns. The test images being used are from the satellite instruments SPOT, MERIS, etc. We propose several methods for artifact detection. The first method is using the Rate-Distortion (RD) function obtained by compressing an image with different compression factors and examines how an artifact can result in a high degree of regularity or irregularity affecting the attainable compression rate. The second method is using the Normalized Compression Distance (NCD) and examines whether artifacts have similar patterns. The third method is using different approaches for RD such as the Kolmogorov Structure Function and the Complexity-to-Error Migration (CEM) for examining how artifacts can be observed in compression-decompression error maps. Finally, we compare our proposed methods with an existing method based on image quality metrics. The results show that the artifact detection depends on the artifact intensity and the type of surface cover contained in the satellite image.

Uma série de transformações ambientais, territoriais, sociais e econômicas têm influenciado os modos de vida das culturas tradicionais estabelecidas nas diversas regiões do Brasil e do mundo. Um dos aspectos que é tocado por essas mudanças é a prática da produção artesanal dos artefatos que auxiliam as atividades domésticas e produtivas dessas populações. Esta pesquisa analisou a atual produção de artefatos artesanais em povoados historicamente fixados na região da Barra do Rio Mamanguape, Paraíba, e também investigou as características presentes do uso de tais artefatos no cotidiano de uma das vilas locais. Essa prática tradicional é fundamentalmente associada às atividades de subsistência desenvolvidas pelas populações da região, como a agricultura, a pesca artesanal e o extrativismo, e tem sido delineada por diferentes fatores de dimensão local e global. Algumas implicações dessa dinâmica são o rareamento da presença da figura do artesão naqueles povoados, bem como o desaparecimento de algumas de suas expressões tradicionais. Foram verificadas variações nas características de alguns artefatos de origem indígena milenar, associados à cultura Potiguara. Também foi constatado o surgimento de outras expressões materiais que decorrem das interações das populações locais com o contexto urbano e industrial, em hibridismo com os elementos culturais tradicionais constituídos a partir da sua histórica relação com os ecossistemas circundantes e a biodiversidade nela existente. Práticas e sentidos embutidos na maneira de produzir o mundo artificial analisada neste contexto foram elencados como aspectos pertinentes ao processo de reconfiguração da atividade do design. Tal reconfiguração é discutida no âmbito de suas práticas e valores, como atividade urbana e industrial responsável pela concepção de grande parte da nossa cultura material, e diante da nossa conjuntura socioambiental. / Traditional cultures of many regions of Brazil have been influenced by many sociocultural, economical, environmental and territorial changes. One of the aspects of their culture that has been changed is the artisanal production of artifacts that are used in everyday domestic and professional activities. This research analyzed the current production of this kind of artifacts in traditional communities situated at Barra do Rio Mamanguape region, Paraíba, and also investigated usage characteristics of artisanal objects in one of the local villages. These traditional practices are associated to subsistence activities developed by the local population, like agriculture, artisanal fishery, gathering, and has been influenced by a number of local and global changes. We have observed that the declining number of artisans and the extinction of some expressions of the traditional material culture are outcomes of these changes. We also verified variations in the characteristics of some artifacts that are linked to the ancient culture of Potiguaras indigenous people. We have observed the emergence of new material expressions determined by interactions between local population and the urban and industrial contexts, involving the traditional elements and maintaining their relationships with local ecosystems and biodiversity. Practices and meanings embedded in the local production of artifacts, as part of the construction of artificial world, were listed as relevant aspects to be considered in the reconfiguration process of values and practices of design, as urban and industrial activity responsible for conceiving our material culture.

The argument advanced is this thesis is that the entities that make up the environment are those that do not owe their origin to any willful creative activity but have evolved through accidental natural processes. This fact of not being willfully created makes the environment ontologically independent and confers on it intrinsic value as opposed to instrumental value. This intrinsic value is one that all the entities that make up the environment share. It is further argued that this intrinsic value is aesthetic rather than moral. Only beings that are specially endowed with certain capacities, like reflection and understanding, could be said, in the context of this work, to have intrinsic moral value in the sense of being moral agents. But as moral agents, we need to give moral considerability to all the natural entities in the environment since they share the same natural right with us, based on our common origin. So, even though the nonhuman, natural entities in the environment do not have moral rights, they have natural rights. It is further argued that this natural right could be best safeguarded in a legal framework.

The argument advanced is this thesis is that the entities that make up the environment are those that do not owe their origin to any willful creative activity but have evolved through accidental natural processes. This fact of not being willfully created makes the environment ontologically independent and confers on it intrinsic value as opposed to instrumental value. This intrinsic value is one that all the entities that make up the environment share. It is further argued that this intrinsic value is aesthetic rather than moral. Only beings that are specially endowed with certain capacities, like reflection and understanding, could be said, in the context of this work, to have intrinsic moral value in the sense of being moral agents. But as moral agents, we need to give moral considerability to all the natural entities in the environment since they share the same natural right with us, based on our common origin. So, even though the nonhuman, natural entities in the environment do not have moral rights, they have natural rights. It is further argued that this natural right could be best safeguarded in a legal framework.

CARVALHO, Liliane Maria Teixeira Lima de. O papel dos artefatos na construção de significados matemáticos por estudantes do ensino fundamental II. 2008. 239 f. Tese (Doutorado em Educação) – Universidade Federal do Ceará. Faculdade de Educação, Programa de Pós-Graduação em Educação Brasileira, Fortaleza-CE, 2008. / Submitted by Raul Oliveira (raulcmo@hotmail.com) on 2012-07-05T14:31:58Z No. of bitstreams: 1 2008_Tese_LMTLCarvalho.pdf: 4899664 bytes, checksum: df61d0611ea9db1257467f902e9384de (MD5) / Approved for entry into archive by Maria Josineide Góis(josineide@ufc.br) on 2012-07-05T14:36:14Z (GMT) No. of bitstreams: 1 2008_Tese_LMTLCarvalho.pdf: 4899664 bytes, checksum: df61d0611ea9db1257467f902e9384de (MD5) / Made available in DSpace on 2012-07-05T14:36:14Z (GMT). No. of bitstreams: 1 2008_Tese_LMTLCarvalho.pdf: 4899664 bytes, checksum: df61d0611ea9db1257467f902e9384de (MD5) Previous issue date: 2008 / A pesquisa investiga se diferentes formas de conceber o papel dos artefatos e apresentação da informação influenciam a construção de significados matemáticos por estudantes de 11 a 14 anos. A cognição humana é concebida como processo mediado pela tradição cultural e histórica das representações enquanto artefatos, inserindo-se essa análise no âmbito do raciocínio matemático. Utilizou-se o método experimental aliado a uma pesquisa-ação envolvendo o design intencional de tarefas. Explorou-se o papel mediacional das tarefas, desde a sua confecção e introdução na sala de aula de matemática, até o seu uso pelos estudantes. Essa abordagem se concretizou por meio de seis experimentos, dos quais participaram 922 estudantes: 598 oriundos do key Stage Three (corresponde em idade ao 7º, 8º e 9º anos do Ensino Fundamental II no Brasil) de quatro escolas inglesas, e 324 oriundos do 7º, 8º e 9º anos de duas escolas brasileiras. O Experimento 1 investiga se gráficos, tabelas ou casos isolados influenciam o raciocínio dos estudantes sobre variáveis discretas. O Experimento 2 verifica se diferentes informações sobre variáveis contínuas influenciam a interpretação gráfica dos estudantes. O Experimento 3 analisa se interações de aspectos visuais e conceituais da informação sobre variáveis contínuas influenciam a interpretação gráfica dos estudantes. O Experimento 4 investiga se gráficos, tabelas ou a combinação de ambas as representações influencia interações de aspectos visuais e conceituais da informação. Esses quatro experimentos foram realizados nas escolas inglesas. As tarefas usadas no primeiro e quarto experimentos foram aplicadas nas escolas brasileiras, sendo designados Experimentos 5 e 6, respectivamente. As tarefas foram potencialmente facilitadoras ao uso de conteúdos matemáticos. Os Experimentos 1 e 5 oferecem evidências de que estudantes já familiarizados com representações em tabelas e gráficos para representar variáveis discretas não se beneficiam em atividades em que eles precisam organizar os dados por eles mesmos. Estudantes ingleses tiram proveito igualmente de tabelas e gráficos. Estudantes brasileiros não se beneficiam do uso de tabelas. Os Experimentos 2 e 3 confirmam resultados de estudos prévios de que informações gráficas sobre variáveis contínuas possuem diferentes níveis de complexidade. Ler pontos é significativamente mais fácil do que interpretar problemas globais. Os Experimentos 2 e 3 também confirmam a hipótese de que os problemas de inferência inversa explicam as dificuldades com informações globais. Essa dificuldade é acentuada em gráficos com inclinação negativa. O Experimento 4 mostra que a forma de apresentação da informação não afeta o desempenho dos estudantes na resolução de problemas sobre variáveis contínuas. O raciocínio dos estudantes sobre variáveis contínuas, no entanto, é influenciado pela forma de apresentação da informação. A pesquisa sugere a necessidade de uma discriminação da informação não apenas quanto ao tipo de variável, discreta ou contínua, ou tipo de relação proporcional, direta ou inversa, mas também quanto ao tipo de inferências requeridas dos estudantes.

Ultrasound investigation is one of meaningful imaging at present. Advantages of ultrasound are, that it hasn´t side effects as a rtg radiation and it is noninvasive. Ultrasound diagnostic is exploited in all branch of medicine (urology, cardiology, orthopeadist, gynecology etc.) to display organs, tissues and cavities of the human body. We use display in 2D, 3D and most modern display in 4D. We can encounter with many kinds of artifact. Artifacts are described more closely at 3rd chapter. Speckle noise deteriorates informative yiled of ultrasound picture. We try to remove speckle noise by simpler methods or more complex methods of filtration. These methods are described at 5th chapter. Programme for speckle filtering from pictures is part of this master´s thesis.

Uma série de transformações ambientais, territoriais, sociais e econômicas têm influenciado os modos de vida das culturas tradicionais estabelecidas nas diversas regiões do Brasil e do mundo. Um dos aspectos que é tocado por essas mudanças é a prática da produção artesanal dos artefatos que auxiliam as atividades domésticas e produtivas dessas populações. Esta pesquisa analisou a atual produção de artefatos artesanais em povoados historicamente fixados na região da Barra do Rio Mamanguape, Paraíba, e também investigou as características presentes do uso de tais artefatos no cotidiano de uma das vilas locais. Essa prática tradicional é fundamentalmente associada às atividades de subsistência desenvolvidas pelas populações da região, como a agricultura, a pesca artesanal e o extrativismo, e tem sido delineada por diferentes fatores de dimensão local e global. Algumas implicações dessa dinâmica são o rareamento da presença da figura do artesão naqueles povoados, bem como o desaparecimento de algumas de suas expressões tradicionais. Foram verificadas variações nas características de alguns artefatos de origem indígena milenar, associados à cultura Potiguara. Também foi constatado o surgimento de outras expressões materiais que decorrem das interações das populações locais com o contexto urbano e industrial, em hibridismo com os elementos culturais tradicionais constituídos a partir da sua histórica relação com os ecossistemas circundantes e a biodiversidade nela existente. Práticas e sentidos embutidos na maneira de produzir o mundo artificial analisada neste contexto foram elencados como aspectos pertinentes ao processo de reconfiguração da atividade do design. Tal reconfiguração é discutida no âmbito de suas práticas e valores, como atividade urbana e industrial responsável pela concepção de grande parte da nossa cultura material, e diante da nossa conjuntura socioambiental. / Traditional cultures of many regions of Brazil have been influenced by many sociocultural, economical, environmental and territorial changes. One of the aspects of their culture that has been changed is the artisanal production of artifacts that are used in everyday domestic and professional activities. This research analyzed the current production of this kind of artifacts in traditional communities situated at Barra do Rio Mamanguape region, Paraíba, and also investigated usage characteristics of artisanal objects in one of the local villages. These traditional practices are associated to subsistence activities developed by the local population, like agriculture, artisanal fishery, gathering, and has been influenced by a number of local and global changes. We have observed that the declining number of artisans and the extinction of some expressions of the traditional material culture are outcomes of these changes. We also verified variations in the characteristics of some artifacts that are linked to the ancient culture of Potiguaras indigenous people. We have observed the emergence of new material expressions determined by interactions between local population and the urban and industrial contexts, involving the traditional elements and maintaining their relationships with local ecosystems and biodiversity. Practices and meanings embedded in the local production of artifacts, as part of the construction of artificial world, were listed as relevant aspects to be considered in the reconfiguration process of values and practices of design, as urban and industrial activity responsible for conceiving our material culture.

Cryo-electron microscopy (cryo-EM) has been established as the leading imaging technique for structural studies from small proteins to whole cells at a molecular level. The great advances in cryo-EM have led to the ability to provide unique insights into a wide variety of biological processes in a close to native, hydrated state at near-atomic resolutions. The developments of computational approaches have significantly contributed to the exciting achievements of cryo-EM. This dissertation emphasizes new approaches to address image processing problems in cryo-EM, including tilt series alignment evaluation, simultaneous determination of sample thickness, tilt, and electron mean free path based on Beer-Lambert law, Model-Based Iterative Reconstruction (MBIR) on tomographic data, minimization of objective lens astigmatism in instrument alignment and defocus and magnification dependent astigmatism of TEM images. The final goal of these methodological developments is to improve the 3D reconstruction of cryo-EM and visualize more detailed characterization.