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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
351

Uvolnění nakupovaných dílů do sériové výroby bez vstupní kontroly / Purchased Components Release for Serial Production without Incoming Inspection

Bil, Miroslav January 2015 (has links)
The theoretical part of this diploma thesis describes methods of incoming inspection with an emphasis on statistical sampling by attributes. The practical part contains an analysis of the qualifying process of suppliers and an analysis of the system of incoming inspection in the Kollmorgen Company. The outcome of the thesis is the system of sampling plans, review of the qualification process and setting up a parameter for monitoring the released parts into serial production.
352

Vyhodnocení podobnosti programových kódů / Plagiarism detection of program codes

Kašpar, Jakub January 2016 (has links)
Main goal of this work is to get acquainted with the plagiarism problem and propose the methods that will lead to detection of plagiarism in program codes. In the first part of this paper different types of plagiarism and some methods of detection are introduced. In the next part the preprocessing and attributes detection is described. Than the new method of detection and adaptive weights usage is proposed. Last part summarizes the results of the detector testing on the student projects database
353

Qualidade da estrutura de um latossolo vermelho em sistema integração lavoura pecuária floresta /

Olivério, Gabriela Lozano. January 2019 (has links)
Orientador: Carolina dos Santos Batista Bonini / Resumo: Sistemas de conservação do solo são capazes de alcançar a sustentabilidade agrícola, juntamente com a integração e diversificação de atividades de manejo. São meios que exploram o sinergismo do sistema, resultado da interação solo-planta-atmosfera. Este trabalho teve como objetivo avaliar de maneira temporal os atributos físicos do solo, sob sistema de integração lavoura-pecuária-floresta, com o intuito de verificar possíveis contribuições na qualidade do solo e na sustentabilidade do sistema. O experimento foi desenvolvido na área experimental da Agência Paulista dos Agronegócios – Polo/Andradina – São Paulo - Brasil. O solo em estudo é um Argissolo Vermelho Amarelo distrófico. O delineamento em blocos casualizados se distribuiu em 4 respectivos tratamentos: T1 – integração lavoura-pecuária, sem o componente arbóreo; T2 – sistema agrossilvipastoril, com sombreamento de 1 linha de eucalipto e densidade de 196 árvores/ha; T3 - sistema agrossilvipastoril, com sombreamento de 3 linhas de eucalipto e densidade de 448 árvores/ha; T4 - plantio exclusivo de eucalipto, as amostras foram coletadas ao longo dos anos de 2014 a 2018, nas camadas de 0-0,05; 0,05-0,10 e 0,10-0,20m, para as avaliações de infiltração de água no solo, resistência à penetração, teor de umidade do solo, densidade do solo, estabilidade de agregado e porosidade do solo. Os resultados revelaram que os sistemas que utilizam integração melhoram e/ou mantêm a qualidade do solo, sem compactar ou influenciar negativame... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: Soil conservation systems are capable of achieving agricultural sustainability together with the integration and diversification of management activities. And are means that exploit the synergism of the system as a result of soil-plant-atmosphere interaction. The objective of this work was to evaluate in a temporal manner the physical attributes of the soil, under a crop- livestock-forrest integration system, in order to verify possible contributions to soil quality and system sustainability itself. The experiment was developed in the experimental area of the Paulista Agrobusiness Agency - Polo/Andradina – São Paulo Brasil. The soil under study is a dystrophic Ultisol. The randomized block design was distributed in 4 respetive treatments: T1 - crop-livestock integration, without the tree component; T2 - agrosilvipastoral system, with 1 eucalyptus line of shading and density of 196 trees/ha; T3 - agrosilvipastoral system, with 3 eucalyptus lines of shading and density of 448 trees ha; T4 - exclusive culture of eucalyptus; the samples were collected from 2014 to 2018, in the 0 -0.05 layers; 0.05-0.10 and 0.10-0.20m for the evaluation of soil water infiltration, penetration resistance, soil humidity content, soil density, aggregate stability and soil porosity. The results revealed that systems using integration improve and / or maintain soil quality without compacting or negatively influencing its water infiltration, with changes in its density and total porosity, highlighting t... (Complete abstract click electronic access below) / Mestre
354

Student preferences for accommodation at a Cape Town University: an application of the stated preference approach

Edwards, Sarita January 2019 (has links)
Thesis (Master of Marketing)--Cape Peninsula University of Technology, 2019 / This thesis sought to investigate students’ preferences regarding university accommodation. The object was to identify the aspects and elements of housing that students deemed most desirable. The research also aimed to ascertain which socio-demographic variables might serve as predictors of preference in student housing. The thesis focused on student housing at a university in Cape Town, South Africa. The researcher adopted a stated preference approach, applying direct measurement and conjoint analysis methods to answer the research questions. The study commenced with qualitative exploratory research, including a literature review and focus group interviews with students. This was followed by collection of cross-sectional quantitative data using person-administered, structured questionnaires distributed among students at the university. SPSS software was used to analyse a total of 457 completed questionnaires. The direct measurement results indicated that most students prioritised convenience, safety, cost and privacy when it came to choosing accommodation. The three most important attributes as ranked by respondents were having unlimited free WiFi, the inclusion of a 24-hour computer lab in the building, and 24-hour on-site security. In addition, respondents favoured the presence of a convenience shop/kiosk in the residence, followed by sharing showers with students of their own gender, and being within walking distance of campus. Preferences for some but not all the dimensions of accommodation appeared to be influenced by gender, age group and study level. When indicating their willingness to pay (WTP) for a variety of elements relating to accommodation, it emerged that the question of sharing the space in their room – their living and learning space – was very important to the students. The results showed that, apart from having unlimited WiFi and 24-hour on-site security, the aspects for which respondents were prepared to pay most concerned the private space of the individual, e.g. room privacy and room size, as well as having their own toilet and shower. WTP attributes also varied among students according to age group, gender and level of study. Results from the stated preference (conjoint) experiment analysis showed that students were most sensitive about the sharing of ablutions and number of roommates, strongly preferring private rooms and facilities, or sharing with fewer other students. Monthly rent is next most influential, followed by distance from campus. The model also showed significant differences in the preferences of students based on their gender. Research in this field is overdue because, owing to recent increases in the tertiary student population in South Africa, there is a growing shortage of student accommodation. Current and future student housing needs must be assessed, and any such assessment requires a thorough grasp of current student accommodation preferences. The results of this research thus contribute to the knowledge and understanding available to managers and developers of student accommodation regarding students’ requirements and preferences. The findings can serve as a set of guidelines for developers of student housing and as a foundation for formulating associated marketing strategies. Despite the existence of extensive research on student housing, few studies have focused on the preferences of students in developing countries, and even fewer in South Africa. This research seeks to fill this gap by increasing awareness and understanding of students’ preferences with regard to university accommodation.
355

AIMM - Analyse d'Images nucléaires dans un contexte Multimodal et Multitemporel / IAMM - nuclear Imaging Analysis in a Multimodal and Multitemporal context

Alvarez padilla, Francisco Javier 13 September 2019 (has links)
Ces travaux de thèse portent sur la proposition de stratégies de segmentation des tumeurs cancéreuses dans un contexte multimodal et multitemporel. La multimodalité fait référence au couplage de données TEP/TDM pour exploiter conjointement les deux sources d’information pour améliorer les performances de la segmentation. La multitemporalité fait référence à la disposition des images acquises à différents dates, ce qui limite une correspondance spatiale possible entre elles.Dans une première méthode, une structure arborescente est utilisée pour traiter et pour extraire des informations afin d’alimenter une segmentation par marche aléatoire. Un ensemble d'attributs est utilisé pour caractériser les nœuds de l'arbre, puis le filtrer et projeter des informations afin de créer une image vectorielle. Un marcheur aléatoire guidé par les données vectorielles provenant de l'arbre est utilisé pour étiqueter les voxels à des fins de segmentation.La deuxième méthode traite le problème de la multitemporalité en modifiant le paradigme de voxel à voxel par celui de nœud à nœud. Deux arbres sont alors modélisés à partir de la TEP et de la TDM avec injection de contraste pour comparer leurs nœuds par une différence entre leurs attributs et ainsi correspondre à ceux considérés comme similaires en supprimant ceux qui ne le sont pas.Dans une troisième méthode, qui est une extension de la première, l'arbre calculé à partir de l'image est directement utilisé pour mettre en œuvre l'algorithme développé. Une structure arborescente est construite sur la TEP, puis les données TDM sont projetées sur l’arbre en tant qu’informations contextuelles. Un algorithme de stabilité de nœud est appliqué afin de détecter et d'élaguer les nœuds instables. Des graines, extraites de la TEP, sont projetées dans l'arbre pour fournir des étiquettes (pour la tumeur et le fond) à ses nœuds correspondants et les propager au sein de la hiérarchie. Les régions évaluées comme incertaines sont soumises à une méthode de marche aléatoire vectorielle pour compléter l'étiquetage de l'arbre et finaliser la segmentation. / This work focuses on the proposition of cancerous tumor segmentation strategies in a multimodal and multitemporal context. Multimodal scope refers to coupling PET/CT data in order to jointly exploit both information sources with the purpose of improving segmentation performance. Multitemporal scope refers to the use of images acquired at different dates, which limits a possible spatial correspondence between them.In a first method, a tree is used to process and extract information dedicated to feed a random walker segmentation. A set of region-based attributes is used to characterize tree nodes, filter the tree and then project data into the image space for building a vectorial image. A random walker guided by vectorial tree data on image lattice is used to label voxels for segmentation.The second method is geared toward multitemporality problem by changing voxel-to-voxel for node-to-node paradigm. A tree structure is thus applied to model two hierarchical graphs from PET and contrast-enhanced CT, respectively, and compare attribute distances between their nodes to match those assumed similar whereas discarding the others.In a third method, namely an extension of the first one, the tree is directly involved as the data-structure for algorithm application. A tree structure is built on the PET image, and CT data is then projected onto the tree as contextual information. A node stability algorithm is applied to detect and prune unstable attribute nodes. PET-based seeds are projected into the tree to assign node seed labels (tumor and background) and propagate them by hierarchy. The uncertain nodes, with region-based attributes as descriptors, are involved in a vectorial random walker method to complete tree labeling and build the segmentation.
356

Small mammal community structure (Rodentia: Muridae) in Punda Maria, Kruger National Park, South Africa : Causes and consequences

Scholtz, Rheinhardt 09 March 2017 (has links)
The population dynamics of small mammal populations in Punda Maria, Kruger National Park, South Africa was investigated with respect to community size and structure, seed predation and dispersal of several trees. Species populations, community structure and habitat attributes were measured at six sites comprising of 3 habitat types (2 sites per habitat); namely Acaciagrassland, North-facing and South-facing sloped sites. Seasonal variation was investigated at the Acacia sites during late summer (April) and winter months (July). Five habitat attributes were measured; percentages of total cover and herbage, plant litter depth (cm), height of dominant vegetation type measured (m) and edaphic condition were recorded at 15 randomly selected traps per site. Almonds (Prunus dulcis), baobabs (Adansonia digitata), mopane (Colophospermum mopane), and Acacia tortilis seeds were used in the predation and dispersal experiment. North- and South-facing sites were dominated by Aethomys sp. while Acacia sites were dominated by Mastomys natalensis. Seed predation was high at the North-facing slopes, with a significant difference in predation on A. tortilis seeds. Seed dispersal activity was low; no , scatter hoarding was identified; only larder hoarding was observed by Aethomys sp. and M. natalensis at North-facing sites and Acacia sites respectively. Trampling by megaherbivore activity impacted vegetation structure and has negatively affected rodent population and ground activity, particularly at the Acacia sites.
357

Análise micromorfológica e relação com atributos de um solo sob diferentes usos e manejos /

Gonçalves, Fernanda Coelho, 1983- January 2011 (has links)
Orientador: Maria Helena Moraes / Banca: Kátia Luciene Maltoni / Banca: José Eduardo Corá / Banca: Sandro Roberto Brancalião / Banca: Maria de Fátima Guimarães / Resumo: As modificações antrópicas, causadas por atividades como cultivo e tráfego de máquinas, afetam diretamente a estrutura do solo, causando diminuição da estabilidade de agregados, aumento da densidade, alterações na porosidade e menor disponibilidade de água e aeração e, conseqüentemente, diminuição do desenvolvimento normal das plantas. A observação da morfologia do solo possibilita visualização da estrutura e do espaço poroso do solo em sua forma natural, tornando a micromorfologia e a análise de imagens ferramentas importantes na interpretação dos efeitos do manejo. O trabalho teve por objetivo avaliar o efeito dos sistemas de uso e manejo sobre os atributos de um Nitossolo Vermelho distroférrico, com auxílio da micromorfologia do solo. O delineamento experimental foi o inteiramente casualizado, com quatro repetições, com os seguintes tratamentos empregados por 19 anos consecutivos: arado de discos com atuação até a profundidade de 0,20 a 0,25 m + duas gradagens niveladoras, grade pesada com atuação até a profundidade de 0,15 a 0,18 m + duas gradagens niveladoras, semeadura direta, pousio com vegetação espontânea e mata. Foram determinados os seguintes atributos: curva de retenção de água, infiltração de água no solo, matéria orgânica, fracionamento químico da matéria orgânica, densidade do solo, porosidade, resistência do solo à penetração, argila dispersa em água, distribuição de agregados por tamanho e diâmetro médio ponderado. Além disso, foi realizada a análise de imagens dos blocos, para a determinação da macroporosidade, e a análise de âminas delgadas para o estudo da porosidade e estrutura do solo. As amostras indeformadas e deformadas foram coletadas nas camadas de 0,0-0,10 m e 0,10-0,20 m. A análise micromorfológica... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The anthropogenic changes caused by activities such as farming and machinery traffic directly affect soil structure, causing a decrease in aggregate stability, increased in soil bulk density, changes in porosity, permeability, lower availability of water and aeration and, consequently, the decrease in the normal development of plants. The observation of soil in its natural form provides better visualization of the structure and behavior of the soil pore space, making the micromorphology and image analysis tools important in interpreting effects of management. This study had as objective to evaluate the effect of the use and management systems on the attributes of a dystroferric Red Nitosol, with the aid of soil micromorphology. The experiment was analysed as a completely randomized design with four replications, and the following treatments employed for 19 consecutive years: disc plow acting to a depth from 0.20 to 0.25 m + two soft harrowings, heavy disc harrow acting to a depth from 0.15 to 0.18 m + two soft harrowings, no tillage, fallow with natural vegetation and forest. The following soil attributes were determined: water retention curve, water infiltration, organic matter, quantification of the humic fractions, bulk density, porosity, resistance to penetration, dispersed clay, distribution of aggregates by size classes and mean weight diameter. The block image analysis were performed to determine the macroporosity, and the analysis of thin sections to study the porosity and soil structure. The undisturbed and disturbed samples were collected in two layers, between 0.0 to 0.10 m and 0.10-0.20 m. The soil micromorphological and micromorfometric analysis allows to characterize the effect of soil use and management... (Complete abstract click electronic access below) / Doutor
358

[en] SEISMIC AMPLITUDE SMOOTHING BY ANISOTROPIC DIFFUSION PRESERVING STRUCTURAL FEATURES / [pt] SUAVIZAÇÃO DE DADOS DE AMPLITUDE ATRAVÉS DE DIFUSÃO ANISOTRÓPICA COM PRESERVAÇÃO DE FEIÇÕES SÍSMICAS

PATRICIA CORDEIRO PEREIRA PAMPANELLI 23 February 2016 (has links)
[pt] A interpretação sísmica consiste em um conjunto de metodologias que visam compreender o modelo estrutural e estratigráfico de uma determinada região. Durante este processo, o intérprete analisa a imagem sísmica buscando identificar estruturas geológicas como falhas, horizontes e canais, dentre outras. Dada a baixa razão sinal-ruído, os algoritmos que dão suporte à interpretação precisam de uma etapa de pré-processamento onde o ruído é reduzido. Esta tese propõe um novo método de filtragem por difusão anisotrópica que melhor preserva as feições sísmicas de interesse. A formulação do processo de difusão permite que os atributos identificadores de horizontes e de falhas sejam incorporados ao método a fim de evitar que estas estruturas sejam corrompidas durante a difusão da amplitude sísmica. O método proposto implementado apresenta resultados aplicados a dados reais disponíveis na literatura. Para estes resultados, é apresentada uma análise da influência do método de filtragem anisotrópica proposta nas medidas de correlação ao longo de horizontes previamente rastreados. Finalmente, a tese apresenta algumas conclusões e sugestões para trabalhos futuros. / [en] Seismic interpretation can be viewed as a set of methodologies to enhance the understanding of the structural and stratigraphic model of a given region. During this process, the interpreter analyzes the seismic imaging seeking to identify geological structures such as faults, horizons and channels, among others. Given the low signal to noise ratio, the algorithms that support the interpretation require a pre-processing stage where the noise is reduced. This thesis proposes a new filtering method based on the anisotropic diffusion of the amplitude field. The formulation of the diffusion process proposed here uses seismic attributes to identify horizons and faults that are preserved in the diffusion process. The proposed method implemented in this thesis also presents results applied to real and synthetic data. Based on these results, we present an analysis of the influence of the proposed method in correlation measurements over horizons previously tracked. Finally the thesis presents some conclusions and suggestions for future work.
359

Fastighetsmäklarens felhantering

Fröberg, Adam, Ra Be, Ramazan January 2022 (has links)
Sammanfattning Titel: Fastighetsmäklarens felhantering Nivå: Examensarbete på Grundnivå (Kandidatexamen) i ämnet företagsekonomi Författare: Adam Fröberg & Ramazan Ra Be Handledare: Akmal Hyder Datum: 2022 – Juni  Syfte: Syftet med uppsatsen är att skapa förståelse för hur enskilda fastighetsmäklare arbetar med service recovery för att åtgärda tjänstemisslyckande, service failure, som uppstår. Metod: Denna studie har tillämpat en kvalitativ forskningsmetod med ett induktivt förhållningssätt. Studiens data har samlats in via semistrukturerade intervjuer och totalt genomfördes åtta intervjuer med fastighetsmäklare. Resultat och slutsats: Studien visar att fastighetsmäklare har en gemensam uppfattning om att när missnöje uppstår är det viktig att ta reda på orsaken till problemet samt lösa det så snabbt som möjligt. Fastighetsmäklarens viktigaste verktyg är kommunikation, i from av, informationsutbyte, tydlighet samt god återkoppling. Åtgärdens snabbhet och initiering är de två viktigaste service recovery åtgärderna för en fastighetsmäklare.  Examensarbetets bidrag: Studien kan nyttjas praktiskt av enskilda fastighetsmäklare som vill jämföra sitt arbetssätt mot andra fastighetsmäklare. På en operativ nivå uppmanar studien till att se över om det finns oönskade arbetssätt hos fastighetsmäklare påmäklarbyrån. Teoretiskt bidrar studien med en beskrivning av fastighetsmäklarensfelhantering samt poängterar de viktigaste service recovery åtgärderna för en fastighetsmäklare. Förslag till vidare forskning: Ett förslag till vidare forskning är att studera hur service recovery hanteras av fastighetsmäklare utifrån kundens perspektiv. Detta är för att belysa kundens version av hur missnöje hanteras. Nyckelord: Service Recovery, Service Failure, Recovery Attributes, Word of Mouth, elektroniskt Word of Mouth
360

Mobbningens påverkan på identitet & grupptillhörighet i subgrupper : En kvalitativ intervjustudie / The impact of bullying on identity & group affilation in subgroups : A qualitative interview study

Thörn, Niklas, Robertsson, Sandra January 2022 (has links)
Alla vill tillhöra något och vara med likasinnade. Mobbning är ett samhällsproblem som kan få förödande effekter, inte bara för de inblandade utan för alla. Syftet med denna kvalitativa intervjustudie var att undersöka hur mobbning bidrar till individers identitetsskapande hos subgrupps-medlemmar samt att undersöka vilken betydelse det har haft för individens sökande efter grupptillhörighet i subgrupper. Med en socialpsykologisk ansats studerades detta genom teorier om social identitet, konformitet, stämplingsteorin och gruppdynamik. Tio semistrukturerade intervjuer genomfördes med individer som tidigare varit utsatta för mobbning och som sökt sig till olika subgrupper. Resultaten visar att mobbning uppstår för att andra individer anser att andra människor på något sätt sticker ut från folkmassan, att identiteter ser olika ut för olika individer och att människor söker sig till subgrupper där de kan känna sig som hemma. / Everyone wants to belong to something and be with like-minded people. Bullying is a societal problem that can have devastating effects, not only for those involved but for everyone. The purpose of this qualitative interview study was to investigate how bullying contributes to individuals identity creation in subgroup members and to investigate what significance it has had for the individual's search for group affiliation in subgroups. With a social psychological approach, this was studied through theories of social identity, conformity, the labeling theory and group dynamics. Ten semi-structured interviews were conducted with individuals who had previously been exposed to bullying and who applied to different subgroups. The results show that bullying occurs because other individuals believe that other people in some way stand out from the crowd, that identities look different for different individuals and that people seek out subgroups where they can feel at home.

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