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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.
11

Värderingsprocessen av Auricula : En redogörelse för informationsförlust, samverkan och ekonomi

Reichenwallner, Fredric January 2023 (has links)
This thesis investigates the potential consequences resulting from the migration process of the medical journal system, Auricula Ordination, to an alternative platform, with a particular focus on the risk of information loss and the long-term accessibility of the migrated data. The study examines how the migration to systems with potentially different data structures poses challenges in preserving the integrity of information. By adopting the perspective of accessibility and using the Records Continuum Model's fourth dimension of pluralisation, this study sheds light on the complexities associated with maintaining the accessibility of information within the new system. Even after the new system is archived. By conducting case studies using the appraisal investigations conducted by the Swedish regions, examples to support the findings were found. This analysis highlights the need to address the information management challenges arising from the migration process and emphasizes the significance of preserving the integrity and accessibility of data in the context of medical journal systems. In conclusion, this study underscores the potential information loss and challenges associated with the migration process of medical journal systems. By drawing insights from the Records Continuum Model, it enhances our understanding of the complexities involved in ensuring long-term accessibility of migrated data. These findings have implications for information management practices in regional archives, calling for more comprehensive approaches to preserve and facilitate access to valuable medical knowledge. / Denna uppsats ämnar till att undersöka de risker som uppstår vid migration av information från en informationsinnehavare till en annan. För att undersöka dessa risker har ett flertal fallstudier gjorts utifrån gallringsutredningen av journalsystemet Auricula Ordination, vilket användes inom hälso- och sjukvården i flertalet av Sveriges regioner. För att avgränsa undersökningen gjordes valet att enbart undersöka de regioner som samarbetar inom R7e-arkiv. Förutom att belysa de risker som finns ämnar likväl denna uppsats att skifta fokus i arkivforskningen i Sverige bort ifrån de större statliga arkiven till att belysa de mindre arkiven i landets regioner.  Syftet med uppsatsen har varit att genom ett flertal fallstudier undersöka konsekvenserna av migrationer av informationssystem och hur detta påverkar den framtida möjligheten för tillgängliggörande. Likväl hur ägandeskapet av informationen kan påverka dess integritet. Den teoretiska utgångspunkten har gjorts utifrån Records Continuum Models fjärde dimension pluralisation. I kombination med en hermeneutiskteori ämnas att skapa en mer utförlig bild av regionernas utgångspunkt i sina utredningar av Auricula och hur perspektivet av tillgängliggörande har framkommit. Undersökningen resulterade i att migrationer av information från ett system till ett annat har en negativ inverkan på framtida möjligheter av tillgängliggörande. Vilket grundas i framförallt riskerna av informationsförluster under själva migrationen. Där förlusten av relevanta metadata är i störst risk att gå förlorad. Vilket i förlängningen kan skada informationens integritet och dess kontext kan gå förlorad.
12

Proveniensprincipen : En problematiserande undersökning utifrån ett kritiskt arkivteoretiskt perspektiv

Bergström, Anna January 2022 (has links)
This paper has had the purpose of examiniating how the chritical discussion about the well known archival theoretical topic The principle of provenance has been discussed by international researchers. The papper has also intended to examinate the discussion of the priniciple of provenance from the swedish national archives guidelines called Överlämnande av arkiv till annan myndighet. The author of this paper has been searching for answers of two research questions; In which ways are the principle of provenance being discussed by researchers in a chritical way? And, in which ways does the national archives of Sweden discuss the principle of provenance in their guidelines?  The papers results in the first research question shows that there is a lot of research about the problems and chritique about the traditional way of seeing and using the principle of provenance. The conclusion from the author regarding the first resaearch question is that many authors of the research articles found that the classical way of describing archives according to the priciple of provenance and respect des fonds, could use some modernazation. Similar patterns and words has been seen in discussion of research from the used articles of this paper, from 1983 to 2020 regarding the principle of provenance. Some special focus for the word of multi-provenance and a minimalistic and maximalistic understanding has been discussed in many of the articles, which has been analyzed by the author with the chosen theory of the paper. The results of the authors second research question shows that the national archives try to follow the principle of provenance at their best in the case were records and archives are being handled over to a new organization. The conclusion of the paper is that the priciple of provenance is chriticized and many searches for a more modern version of it, including multiprovenance and a broader perspective of the principle. The results from above has then been analyzed from a theoretical point of view with the records continuum model and a problematizized postmodern perspective.
13

Development of an efficient embedded discrete fracture model for 3D compositional reservoir simulation in fractured reservoirs

Moinfar, Ali, 1984- 02 October 2013 (has links)
Naturally fractured reservoirs (NFRs) hold a significant amount of the world's hydrocarbon reserves. Compared to conventional reservoirs, NFRs exhibit a higher degree of heterogeneity and complexity created by fractures. The importance of fractures in production of oil and gas is not limited to naturally fractured reservoirs. The economic exploitation of unconventional reservoirs, which is increasingly a major source of short- and long-term energy in the United States, hinges in part on effective stimulation of low-permeability rock through multi-stage hydraulic fracturing of horizontal wells. Accurate modeling and simulation of fractured media is still challenging owing to permeability anisotropies and contrasts. Non-physical abstractions inherent in conventional dual porosity and dual permeability models make these methods inadequate for solving different fluid-flow problems in fractured reservoirs. Also, recent approaches for discrete fracture modeling may require large computational times and hence the oil industry has not widely used such approaches, even though they give more accurate representations of fractured reservoirs than dual continuum models. We developed an embedded discrete fracture model (EDFM) for an in-house fully-implicit compositional reservoir simulator. EDFM borrows the dual-medium concept from conventional dual continuum models and also incorporates the effect of each fracture explicitly. In contrast to dual continuum models, fractures have arbitrary orientations and can be oblique or vertical, honoring the complexity and heterogeneity of a typical fractured reservoir. EDFM employs a structured grid to remediate challenges associated with unstructured gridding required for other discrete fracture models. Also, the EDFM approach can be easily incorporated in existing finite difference reservoir simulators. The accuracy of the EDFM approach was confirmed by comparing the results with analytical solutions and fine-grid, explicit-fracture simulations. Comparison of our results using the EDFM approach with fine-grid simulations showed that accurate results can be achieved using moderate grid refinements. This was further verified in a mesh sensitivity study that the EDFM approach with moderate grid refinement can obtain a converged solution. Hence, EDFM offers a computationally-efficient approach for simulating fluid flow in NFRs. Furthermore, several case studies presented in this study demonstrate the applicability, robustness, and efficiency of the EDFM approach for modeling fluid flow in fractured porous media. Another advantage of EDFM is its extensibility for various applications by incorporating different physics in the model. In order to examine the effect of pressure-dependent fracture properties on production, we incorporated the dynamic behavior of fractures into EDFM by employing empirical fracture deformation models. Our simulations showed that fracture deformation, caused by effective stress changes, substantially affects pressure depletion and hydrocarbon recovery. Based on the examples presented in this study, implementation of fracture geomechanical effects in EDFM did not degrade the computational performance of EDFM. Many unconventional reservoirs comprise well-developed natural fracture networks with multiple orientations and complex hydraulic fracture patterns suggested by microseismic data. We developed a coupled dual continuum and discrete fracture model to efficiently simulate production from these reservoirs. Large-scale hydraulic fractures were modeled explicitly using the EDFM approach and numerous small-scale natural fractures were modeled using a dual continuum approach. The transport parameters for dual continuum modeling of numerous natural fractures were derived by upscaling the EDFM equations. Comparison of the results using the coupled model with that of using the EDFM approach to represent all natural and hydraulic fractures explicitly showed that reasonably accurate results can be obtained at much lower computational cost by using the coupled approach with moderate grid refinements. / text
14

Propriedades eletrônicas da matéria topológica: heteroestruturas e efeitos da rotação

Lima, Jonas Romero Fonseca de 19 February 2014 (has links)
Made available in DSpace on 2015-05-14T12:14:10Z (GMT). No. of bitstreams: 1 arquivototal.pdf: 1315751 bytes, checksum: ac1c804a66de6eb3a5e3c4a1cb7d3e04 (MD5) Previous issue date: 2014-02-19 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / In this thesis we study the electronic properties of several systems of condensed matter physics using two different continuum models, the effective mass theory and the effective Dirac Hamiltonian. In several systems, there is an effective mass depending on position. Some models for the kinetic energy operator were proposed to describe these systems, but there is no definition of which one is the most appropriate. It is one of the oldest open questions in solid state physics. We propose a new model, where we consider all permutations among the operators and show that it satisfies the fundamental requirements of quantum mechanics. We use this model to obtain the minibands structure of a heterostructure composed by two different materials and compare our model with other models previously proposed. We also get the Schrödinger equation for a particle constrained to a curved surface with position dependent mass. We follow the da Costa approach, where there is a geometric potential. We show that the position dependent mass does not affect the geometric potential, contributing only to the kinetic part. We use this equation to study the electronic transport in a junction of two cylinders with different radii, with the effective mass varying with the cylinder radius. Using the effective Dirac Hamiltonian, we consider a graphene sheet on a periodic substrate heterostructure composed by two different materials. Each material induces a specific energy gap and Fermi velocity in the graphene, so the Dirac Hamiltonian has a gap (mass) term and a Fermi velocity depending on position. We write this operator taking into account that it has to be Hermitian and we obtain the minigaps induced by the substrate in the electronic structure of graphene. Motivated by experimental results, we study the effects of rotation on the electronic structure of carbon nanotubes, fullerene C60 and topological insulators, using an effective Dirac operator. In the carbon nanotube and C60 cases, the rotation adds a shift in the energy levels and a break in spin degeneracy. In the topological insulator case, the rotation adds only a shift in the energy. / Nesta tese estudamos as propriedades eletrônicas de diversos sistemas físicos da matéria condensada utilizando dois modelos contínuos distintos, o modelo de massa efetiva e o hamiltoniano de Dirac efetivo. Em vários sistemas existe o aparecimento de uma massa efetiva dependente da posição. Diversos modelos para o hamiltoniano cinético com massa efetiva variável foram propostos, mas não existe uma definição de qual seja o mais adequado. Essa é uma das questões mais antigas em aberto na física do estado sólido. Nós propomos um novo modelo, levando em conta todas as permutações possíveis entre os operadores e mostramos que ele satisfaz os requisitos fundamentais da mecânica quântica. Nós usamos esse modelo para obter a estrutura de minibandas de uma heteroestrutura formada por dois materiais diferentes e comparamos o nosso modelo com outros modelos propostos anteriormente. Também obtemos a equação de Schrödinger para uma partícula confinada a uma superfície curva com massa efetiva dependendo da posição. Seguimos a abordagem de da Costa, onde surge um potencial geométrico. Mostramos que a massa variável não altera a potencial geométrico, contribuindo apenas para a parte cinética. Nós usamos a equação obtida para estudar as propriedades de transporte eletrônico em uma junção de dois cilindros de raios diferentes, com a massa efetiva variando com o raio do cilindro. Utilizando um hamiltoniano de Dirac efetivo nós consideramos o grafeno sobre um substrato formado por uma heteroestrutura com dois materiais diferentes. Cada material induz um gap de energia e uma velocidade de Fermi específica no grafeno, fazendo com que tenhamos um hamiltoniano de Dirac com termo de gap (massa) e velocidade de Fermi dependendo da posição. Nós escrevemos esse operador levando em conta que ele tem que ser hermitiano e obtemos a estrutura de minibandas induzidas na estrutura eletrônica do grafeno pelo substrato. Motivados por resultados experimentais, nós também estudamos os efeitos da rotação na estrutura eletrônica do nanotubo de carbono, fulereno C60 e isolante topológico, utilizando um hamiltoniano de Dirac efetivo. Para o nanotubo de carbono e o C60 a rotação adiciona um deslocamento nos níveis de energia e há uma quebra na degenerescência de spin. No isolante topológico a rotação induz apenas um deslocamento na energia.
15

A qualitative assessment of what comprises an effective and positive supervisor-student clinician relationship in speech-language pathology

Fencel, Jessica Atick 06 July 2016 (has links)
The purpose of this study was to gain a better understanding of the factors that constitute a positive and negative supervisor-supervisee relationship as perceived by speech-language pathology graduate students. Clinical practicum experiences were analyzed using qualitative methods via recorded in-depth participant interviews. After the data were collected and transcribed, the narratives were analyzed to draw useful inferences and discover underlying themes using a phenomenological methodology approach. Two overlaying themes, ASHA’s Task 1 of Supervision and Anderson’s Continuum Model of Supervision, were identified from the participants’ interviews and were used to categorize the data. Results indicate the most likely factors attributed to a positive clinical experience included constructive feedback, respect, positive praise, clear expectations and structured clinical guidance while the factors that were most likely attributed to a negative experience were lack of constructive feedback, lack of perceived respect, negative criticism, unclear expectations, and minimal clinical guidance.
16

The relationship between team identity and sports media consumption

Robins, Scott James 24 February 2013 (has links)
With the emergence of new media platforms one wonders about the impact new media is having on sports fans’ media consumption patterns. Are traditional media platforms still having the same impact on the sports fan relationship, or has there been a shift across to new platforms? Looking through the lens of the Psychological Continuum Model (PCM) framework, we analyse the impact of team identification and sports fans’ media consumption patterns.Trying to gain an understanding across various sports and to reach as many fans as possible, the snowballing technique was deployed. Using quantitative data allowed us to establish emerging patterns through categorical data. This study used cross-sectional data, which allowed us to take a snapshot in time of what the current trend in fans’ sports media consumption was. 235 sports fans media consumption patterns were analysed using the PCM staging algorithm and a sports media consumption instrument.The results throughout this study reflect that new media is having an impact on team identity and sports fan media consumption. The findings suggests that fans that display higher levels of team identification on the PCM framework, i.e. attachment and allegiance to teams, are more likely to engage regularly on social media, especially Twitter. As such, marketers, sports teams and associations need to look at how they engage with social media broadly and Twitter in particular. Various constructs impact sports fans’ media consumption patterns and, as such, marketers, sports teams and organisations need to ensure that they maintain relevance with their targeted demographic to ensure the continued engagement with sports fans. / Dissertation (MBA)--University of Pretoria, 2012. / Gordon Institute of Business Science (GIBS) / unrestricted
17

Optimization of Pseudo-Rigid-Body Models for Accurately and Efficiently Predicting Dynamics of Compliant Mechanisms

She, Yu January 2018 (has links)
No description available.
18

The Innovation Imperative: Not Without Design

Hardin, Dianne 11 July 2014 (has links)
No description available.
19

Handläggares praktiska makt över bevarande och gallring : En studie hos svenska statliga myndigheter

Agius, Eva January 2016 (has links)
I och med att det finns en möjlighet till otillåten gallring, och därmed risk för allmänhetens bristande insyn i svenska statliga myndigheters verksamhet, var syftet med denna uppsats att se i vilken utsträckning en handläggare har praktisk makt över bevarande och gallring hos svenska statliga myndigheter. Vidare var uppsatsens syfte att redovisa vilka faktorer i myndigheternas egen verksamhet som bidrog till utfallet av hur handläggare hanterade bevarande och gallring.   Som metod har intervjuer gjorts med arkivarier och handläggare på två olika svenska statliga myndigheter för att se om myndigheternas verksamheter påverkade hur handläggare valde att bevara eller gallra handlingar som de hanterade. I undersökningen deltog en mindre myndighet och en större myndighet med syftet att undersöka om olika verksamheter kunde påverka vem som hade den praktiska makten över bevarande och gallring hos myndigheterna.   Som teorimodell användes verksamhetsteorin och verksamhetssystemet för att systematisera och redovisa resultaten av undersökningarna. Ännu en teorimodell som lyftes fram i uppsatsen var Records Continuum Model som visade på informationens olika dimensioner och vikten av att fånga och organisera handlingar så att det finns en möjlighet att tillgängliggöra dem.   De två fallstudierna visade att det förekom att handlingar inte hanterades efter de regler och rutiner som tagits fram för den ena av myndigheterna. Resultatet visade också att hur verksamheten såg ut hos myndigheten starkt påverkade den praktiska makten som handläggare gavs för att ta ställning till bevarande och gallring av vissa handlingar. Resultatet visade att för en myndighet med många anställda och större informationsflöden har arkivarien svårt att nå ut med information och rutiner på ett bra sätt och handläggare hade mindre tid till att värdera informationen. / There is a suspicion of increased destruction of documents when the Administrative Officer manages the records appraisal in Swedish government authorities, which can lead to a problem regarding the transparency and public access to information. The aim of this thesis was to contribute with knowledge about in which extent an Administrative Officer has the power over practical records appraisal in Swedish government authorities and to find out if the practical power depended on activities within the agencies.   Interviews with Archivists and Administrative Officers at two different Swedish government authorities were conducted in order to see if the activities within the authorities affected how Administrative Officers handled the records appraisal. The study involved a small and a large authority to examine whether different activities could affect the practical power over records appraisal.   The activity theory was used to introduce, present and analyze the survey results. Records Continuum Model is another theory model that was highlighted in the thesis to show the importance of planning the records management even before a record is created.   The result of the case studies showed that there were records not handled according to the rules and policies for one of the studied authorities. It was revealed that Administrative Officers had some practical power over appraisal. The result also showed that the activities within the authorities strongly affected the practical power which Administrative Officers was given. It was shown that, in an authority with a large number of employees and greater flow of information, the Archivist did not reach out with information and routines to the employees. Administrative Officers also had less time to evaluate information when the number of e-mail was a problem.
20

Proveniensprincipen : Vara eller icke vara - det är frågan i en digitaliseradinformationsförvaltning

Nilsson, Marita January 2018 (has links)
Detta forskningsarbete lyfter den problematik somdebatterats kring proveniensprincipen och den ombildningdenna princip har mött sedan digitaliserings ankomst.Studiens avsikt var att påvisa vilken innebörd principen haridag i en modern informationsförvaltning och deninformationshantering som sker där. Syftet var även attundersöka hur informationsförvaltningen arbetar proaktivtmed att garantera proveniens i all sin informationshantering,samt belysa hur proveniens förstås i förhållande till valet avmetod kring informationshanteringen.Undersökningen var kvalitativ och utfördes på tiokommunarkiv i form av att varje kommuns kommunarkivariedjupintervjuades. I undersökningen har även planer kringinformationshantering en studerats. Studien konstaterar vilkaförenklingar som digitaliseringen inneburit kring att säkerställa proveniens, där automatiserad och utvecklad metadataskapat verklig proveniens som kan påvisa informationenssamband med den process och det sammanhang där den harbefunnit sig. Uppsatsen diskuterar även de bekymmer somuppstår då digitaliserad information ordnas på helt andra sättän tidigare och vilka konsekvenser detta får för hur vi skaförhålla oss till och förstå proveniens.Resultatet visar att informationsförvaltningarna kan borga föryttre proveniens vad gäller arkivmaterialet men inte helahandlingsbeståndet. Studien fastslår vidare att inreproveniens som en spegling av organisationens verksamhetmåste förstås utifrån hela handlingsbeståndet och desslogiska ordning, snarare än utifrån arkivmaterialets synliga.Undersökningen konstaterar även betydelsen av proaktivitetkring arbetet med att tydliggöra informationens processuellakontext, samt tidig metadataapplicering ochsystemutveckling som behåller metadata genom allaprocesser. Uppsatsen understryker slutligen att detta inte görsi den utsträckning som är nödvändig. / This essay describes the debate about the principle ofprovenance and its multiple forms, and the transformationsof these forms, due to the coming of electronic informations.The thesis intended to explain the definitions of the principlein a modern information management and there explore howthey operate proactively to assure provenance.The qualitative investigation was carried out at tenmunicipality final archives, where each municipalityarchivist was being interviewed. The study expounds in whatway the digitisation has simplified the methods to conductassured provenance, where automated metadata shows therelationships of the information to function and process. Theessay also debates the difficulties that appear when digitalinformation are being organized in different ways thananalogue information, and how this fact requires a newinterpretation of the principle of provenance.The researcher concludes that the investigated archives,ensure respect des fonds when it concerns the content of thearchives, but not when it comes to the whole content of theinformation management. The result of the study also showsthat the respect of original order as a reflection of theorganization, has to be understood throughout all content ofthe management and its logical order, rather than the visiblecontent that the archives embrace. Furthermore the thesisobserves the importance of proactivity, regarding theclarification of the relationships between the information andthe processes that produce and use them. This could beachieved with early application of metadata and developmentof systems that keep metadata trough all processes. Theconclusion of the essay is that this is not pursued in theextension that is required.

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