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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.
201

Wie viel Struktur benötigt ein Wiki? Fallbeispiel wikibasiertes Intranet

Lutter, Claudia, Höhne, Sebastian January 2010 (has links)
Sowohl für Wissenswikis als auch Intranetwikis sind folgende Leitfragen zu klären: Wie und wer definiert die Inhaltsstruktur für das Enterprise Wiki? Wie kann der Nutzer selbst einen Überblick behalten und sicherstellen, dass die relevanten Informationen ankommen? Die Inhalte eines Wikis sind nicht unstrukturiert! Die Anwender bilden eine gewisse Struktur über Schlagworte und Seitenhierarchien. Zusätzlich bringt eine Gliederung in Wiki-Bereichen die notwendige Erststruktur und die erstellte Inhaltsübersichten die notwendige Transparenz.
202

Další vzdělávání gymnaziálních učitelů geografie v Karlovarském kraji / Further education of secondary-grammar-school geography teachers in Karlovy Vary region

Fenklová, Eva January 2011 (has links)
The master thesis focuses on further education of secondary-grammar-school geography teachers in the Karlovy Vary region. The topic has been studied in detail using a qualitative research in the form of multiple case studies of semi-structured interviews of persons relevant to further education in the studied region. The qualitative research conducted brings a wide range of data relevant to the approaches taken by management of different schools and geography teachers to further education, opportunities for further education in the Karlovy Vary region, and the subsequent transfer of its results to the geography curriculum. Based on the data collected from the persons asked, a proposal for a possible expansion of the further education of secondary-grammar-school geography teachers in the Karlovy Vary region was drafted. This proposal represents a motivation for improvement of the quality of the geography curriculum in the region.
203

Micro structured coupling elements for 3D silicon optical interposer

Killge, Sebastian, Charania, Sujay, Lüngen, Sebastian, Neumann, Niels, Al-Husseini, Zaid, Plettemeier, Dirk, Bartha, Johann W., Nieweglowski, Krzysztof, Bock, Karlheinz 06 September 2019 (has links)
Current trends in electronic industry, such as Internet of Things (IoT) and Cloud Computing call for high interconnect bandwidth, increased number of active devices and high IO count. Hence the integration of on silicon optical waveguides becomes an alternative approach to cope with the performance demands. The application and fabrication of horizontal (planar) and vertical (Through Silicon Vias - TSVs) optical waveguides are discussed here. Coupling elements are used to connect both waveguide structures. Two micro-structuring technologies for integration of coupling elements are investigated: μ-mirror fabrication by nanoimprint (i) and dicing technique (ii). Nanoimprint technology creates highly precise horizontal waveguides with polymer (refractive index nC = 1.56 at 650 nm) as core. The waveguide ends in reflecting facets aligned to the optical TSVs. To achieve Total Internal Reflection (TIR), SiO2 (nCl = 1.46) is used as cladding. TSVs (diameter 20-40μm in 200-380μm interposer) are realized by BOSCH process1, oxidation and SU-8 filling techniques. To carry out the imprint, first a silicon structure is etched using a special plasma etching process. A polymer stamp is then created from the silicon template. Using this polymer stamp, SU-8 is imprinted aligned to vertical TSVs over Si surface.Waveguide dicing is presented as a second technology to create coupling elements on polymer waveguides. The reflecting mirror is created by 45° V-shaped dicing blade. The goal of this work is to develop coupling elements to aid 3D optical interconnect network on silicon interposer, to facilitate the realization of the emerging technologies for the upcoming years.
204

Unlocking the Potential of Biodiversity Data : Managing and Sharing Data from Biodiversity Surveys / Att låsa upp potentialen av biodiversitets data : Hantering och delning av data från Naturvärdesinventeringar

Karlsson, Tom, Rådberg, Anton January 2023 (has links)
Biodiversity surveys conducted by consulting firms generate valuable biodiversity data. However, the full potential of this data remains untapped without proper structuring and integration into a collaborative network of shared data. This thesis addresses the lack of studies exploring data management in biodiversity surveys and the specific requirements for data structuring. The objective of this Bachelor’s thesis is to introduce the concepts of data management in biodiversity surveys and collaborative data sharing, which have gained scientific popularity due to advancements in data-driven technologies and growing public interest in environmental sustainability. Using a qualitative and exploratory approach based on the Design Science Research paradigm, this research draws general conclusions on data management practices in biodiversity surveys and identifies the requirements for new data standards. The findings of this thesis serve as a starting point for ongoing efforts toward establishing a standardised structure for biodiversity survey data. Such a structure would enable meaningful insights through data-driven technologies and facilitate integration into a collaborative network of shared data. By addressing the gap in understanding data management and data standards in biodiversity surveys, this research contributes to the effective utilization of biodiversity data, ultimately supporting the achievement of sustainability goals. / Naturvärdesinventeringar utförda av konsultfirmor i Sverige genererar en betydande mängd biodiversitetsdata. För att utnyttja värdet av denna data fullt ut är strukturerad hantering och öppen samverkan och delning av data inom öppna data-ekosystem avgörande. Genom att organisera och standardisera datan på ett enhetligt sätt blir den mer användbar och kan bidra till att uppnå globala och nationella hållbarhetsmål. Trots behovet finns det brist på studier som fokuserar på datahantering vid Naturvärdesinventeringar och specifikt specificerar kraven för strukturerad hantering av data. Detta kandidatarbete introducerar ämnet datahantering från Naturvärdesinventeringar samt delning av data inom öppna data-ekosystem. Dessa ämnen har blivit alltmer populära inom forskningen på grund av framstegen inom datadrivna teknologier och det ökande allmänna intresset för miljömässig hållbarhet. Med en kvalitativ och utforskande metod baserad på Design Science Research-paradigmet drar denna forskning generella slutsatser om god praxis för datahantering vid Naturvärdesinventeringar samt identifierar krav som behöver uppfyllas för att kunna dela datan inom öppna data-ekosystem. Resultaten av detta arbete utgör en grund för fortsatt arbete mot att etablera en standardiserad struktur för biodiversitetsdata från Naturvärdesinventeringar. En sådan struktur skulle möjliggöra djupare insikter genom datadrivna teknologier samt underlätta integreringen av data inom öppna data-ekosystem. Genom att belysa kunskapsbristen inom datahantering och datastandarder vid Naturvärdesinventeringar bidrar detta arbete till en effektivare användning av biodiversitetsdata och stödjer därmed arbetet med att uppnå hållbarhetsmålen.
205

Pipe failure assessment and decision support system for a smart operation and maintenance : A comprehensive literature review and a conceptual decision analysis model proposal

Meydani, Roya January 2022 (has links)
The reported research provides a rough guide to the best practice of decision modeling concerning urban pipeline systems’ rehabilitation. The thesis aims to bring attention to the fact that a proper decision-making model is a cornerstone for efficient infrastructure management. More precisely, this thesis aims to increase the knowledge about applicable decision support methods by identifying relevant factors that should be considered in the decision-making process. This can, facilitate future rehabilitation attempts of existing urban infrastructure. A utility-based decision model was adopted for a water distribution network in Sweden to locate and rehabilitate leakages as an ultimate sign of failure. This was performed by implementing and evaluating a Bayesian decision model including the treatment of uncertainties in evaluating the best decision from a short-term perspective. Despite its simplicity, the result showed that the proposed model could facilitate problem-solving approaches when uncertainty is an issue. Considering the several interacting factors of services and the availability of information, the importance of problem structuring before applying a decision model was extensively acknowledged. As a result, a conceptual decision model was proposed to choose the most appropriate decision model applicable for a particular problem in the essence of deciding how to decide. The presented model illustrated the first steps of developing a theoretical framework for a rational yet practical decisionmaking. This approach, which is aimed to be further employed in rehabilitation strategies of urban pipelines, ensures that the chosen decision technique has explicitly considered different levels of uncertainty and would be the best-established solution for a particular type of problem, organization, and stakeholder. This effort may help the decision analysts define the problem and elicit objectives and values relatively early in the decision-making to ensure that decisions to be selected would support the desired outcomes, actions, and core values. Then, a critical evaluation of the decision strategy was presented by comparing the performed Bayesian approach with the proposed conceptual model. Then so, it was shown that the choice of the decision model is dissimilar if the presented specific basic components vary. This was performed by presenting two semi-fictitious case studies, exemplifying the framework’s importance in structuring the assessment of available means. / Forskningen som redovisas i denna uppsats utgör en översiktlig guide till en praktisktillämpning av beslutsmodellering gällande underhåll av urbana ledningssystem.Syftet med licentiatuppsatsen är att betona att en korrekt modell för beslutsfat-tande är nödvändig för en effektiv förvaltning av infrastruktur. Mer specifikt ärmålet att öka kunskapen om tillämpbara beslutsstödsmetoder genom att identifiera relevanta faktorer som bör beaktas i beslutsprocessen. Det förväntas underlätta framtida underhållsaktiveter för befintlig urban infrastruktur. En nyttobaserad beslutsmodell för åtgärdsplanering har applicerats på en del av ettsvenskt vattenledningssystem, där läckage är den kritiska händelse som hanteras.Modellen baserad på Bayesiansk beslutsteori har implementerats och utvärderatsmed avseende på hantering av osäkerheter och beslutsoptimering ur ett korttidsper-spektiv. Trots modellens enkelhet visar resultatet att den kan underlätta metodvalför problemlösning när det råder osäkerheter i förutsättningarna. Vikten av en tydlig och strukturerad problembeskrivning inför tillämpningen av enbeslutsmodell bekräftas, där beaktande av interaktioner mellan ibland flera faktoreri systemets funktion och den tillgängliga informationen är viktig. Som ett resultatföreslås en konceptuell metod för att välja den mest lämpliga beslutsmodellen förett specifikt problem med syftet att besluta hur man bör besluta. Den presenter-ade metoden utgör ett första steg i utvecklingen av ett teoretiskt ramverk för ettrationellt och samtidigt praktiskt beslutsfattande. Arbetet hjälper beslutsfattarenatt strukturera problemet och lyfta syftet och värden tidigt i beslutsfattandet föratt säkerställa att tagna beslut stödjer eftersökta utfall, åtgärder och kärnvärden. Vidare har en kritisk utvärdering av beslutsstrategier presenterats som en jämförelsemellan den Bayesianska beslutsmodellen och den konceptuella metoden. Den visaratt valet av beslutsmodell skiljer sig om de grundläggande förutsättningarna ärolika. Utvärderingen baseras på två semifiktiva fallstudier som visar på vikten avstrukturering i bedömningen av tillgänglig information och tillgängliga resurser. / <p>2022-10-24</p> / Mistra InfraMaint
206

Metal Halide Perovskites / Inkjet printing of Optolelectronic Devices

Schröder, Vincent 20 March 2024 (has links)
Metallhalogenid Perowskite sind eine aufkommende Klasse von Halbleitermaterialien, die einige der besten Eigenschaften von organischen und anorganischen Halbleitern vereinen. Die Materialien kombinieren eine hohe Leitfähigkeit und modulierbare Bandlücke mit hohem Absorptionskoeffizienten und Löslichkeit in organischen Lösungsmitteln. Verarbeitungsmethoden wie Tintenstrahldruck ermöglichen somit die Herstellung von kristallinen Halbleitern mit direkter Bandlücke aus Lösung. Zunächst werden in einem kombinatorischen Druckprozess drei Perowskittinten, aus drei separaten Druckköpfen, während des Druckprozesses gemischt. Es resultiert eine Reihe von Perowskitfilmen mit genau definierten Zusammensetzungen. Die Kontrolle über die resultierenden Materialeigenschaften wird durch die Herstellung einer Reihe wellenlängenselektiver Fotodetektoren und Langpassfiltern demonstriert, die zu einem tintenstrahlgedruckten dispersionselementfreien Spektrometer kombiniert werden. Weiterhin wird mit den Möglichkeiten eines Tintenstrahldruckers für großflächige Bearbeitung ein etabliertes Verfahren für Tintenstrahl-gedruckte Perowskit-LEDs (PeLEDs) hochskaliert. Mit dem gleichen Druckverfahren und der gleichen Tintenzusammensetzung wurde die aktiv emittierende Fläche von 4 mm² auf 1600 mm² erhöht. Es konnte ein homogener Perowskit Dünnfilm für PeLEDs gedruckt werden, ohne einen Anstieg des Leckstroms mit steigender Fläche zu verursachen. Zuletzt werden die Strukturierungsmöglichkeiten des Tintenstrahldrucks genutzt um zweifarbige PeLEDs herzustellen. Auf einer primären Perowskitschicht wird eine zweite Perowskit-Vorläufertinte aufgebracht. Während des Betriebs erfährt der gemischte Halogenid-Perowskit eine Phasenseparierung und zeigt nur tiefrote Emission von iodidreichen Domänen vor einem hellgrünen emittierenden Hintergrund, dessen Helligkeit nicht durch den Strukturierungsprozess vermindert wird. / Metal halide perovskites are an emerging semiconductor material class that combines some of the best properties of inorganic and organic semiconductors. The material pairs high conductivity and composition-based bandgap tunability with solution processability and high absorption coefficients. Deposition methods like inkjet printing thus allow for the fabrication of crystalline, direct bandgap semiconductors from solution for various applications. First, in a combinatorial printing approach, three perovskite precursor inks, from three separate printheads, are mixed during the printing process. By controlling the perovskite composition, material properties such as the bandgap can be tuned. This is demonstrated by fabrication of a range of wavelength-selective photodetectors and longpass filters, which are combined to yield an inkjet-printed, dispersion element-free spectrometer. Furthermore, using the large-scale capabilities of an inkjet printer, a previously established procedure for inkjet-printed perovskite LEDs (PeLEDs) is upscaled. The actively emitting area is increased from 4 mm² to 1600 mm² using the same printing procedure and ink formulation. This achieved a homogeneous perovskite film, that showed no increase in leakage current, independent of size. Finally, using the patterning capabilities of inkjet printing, dual coloured red/green PeLEDs are fabricated in a sequential printing process. On a primary perovskite layer, a second perovskite precursor ink is deposited. Under operation in a PeLED, the mixed halide perovskite experiences phase segregation and only shows deep red emission from iodide-rich domains against a bright green emitting background, which still performs as well as a non-patterned device.
207

Modellierung, Planung und Gestaltung der Logistikstrukturen kompetenzzellenbasierter Netze

Ackermann, Jörg 09 October 2007 (has links) (PDF)
Kompetenzzellenbasierte (regionale) Netze stellen besondere Anforderungen an die Modellierung, Planung und Gestaltung der Logistikstrukturen. Für die Logistikstrukturmodellierung werden ein generischer Beschreibungsrahmen für produktionslogistische soziotechnische Systeme, Definitionen u.a. zum zentralen Begriff Logistikstruktur sowie ein 3-Ebenen-Modell und Strukturtypen für eine vertiefende Materialflussanalyse und -synthese bereitgestellt. Für die Logistikstrukturplanung wird darauf aufbauend mit der Methode der Integrativen Prozess- und Systemstrukturierung (IPSS) eine Methode zur Behandlung von Strukturierungsproblemen konzipiert, die sowohl speziell für kompetenzzellenbasierte Netze als auch allgemein für Produktions- und Logistiksysteme angewandt werden kann. Für die Logistikstrukturgestaltung werden unter Modell- und Methodenverwendung Szenarien sowie Gestaltungs- und Vorzugslösungen für den Materialfluss abgeleitet. / Competence-cell based (regional) networks put special requirements on the modelling, planning and design of logistics structures. For the modelling of logistics structures, a generic description framework for production logistic sociotechnical systems, definitions for, amongst others, the central term logistics structure as well as a 3-layer-model and structure types for a more detailed material flow analysis and synthesis are provided. For the planning of logistics structures, the Method of Integrative Process and System Structuring (IPSS) is developed as a method for handling structuring problems. It can be applied especially to Competence-cell based networks as well as generally to production and logistics systems. For the design of logistics structures, scenarios as well as design and preference solutions for the material flow are derived.
208

Modellierung, Planung und Gestaltung der Logistikstrukturen kompetenzzellenbasierter Netze

Ackermann, Jörg 05 September 2007 (has links)
Kompetenzzellenbasierte (regionale) Netze stellen besondere Anforderungen an die Modellierung, Planung und Gestaltung der Logistikstrukturen. Für die Logistikstrukturmodellierung werden ein generischer Beschreibungsrahmen für produktionslogistische soziotechnische Systeme, Definitionen u.a. zum zentralen Begriff Logistikstruktur sowie ein 3-Ebenen-Modell und Strukturtypen für eine vertiefende Materialflussanalyse und -synthese bereitgestellt. Für die Logistikstrukturplanung wird darauf aufbauend mit der Methode der Integrativen Prozess- und Systemstrukturierung (IPSS) eine Methode zur Behandlung von Strukturierungsproblemen konzipiert, die sowohl speziell für kompetenzzellenbasierte Netze als auch allgemein für Produktions- und Logistiksysteme angewandt werden kann. Für die Logistikstrukturgestaltung werden unter Modell- und Methodenverwendung Szenarien sowie Gestaltungs- und Vorzugslösungen für den Materialfluss abgeleitet. / Competence-cell based (regional) networks put special requirements on the modelling, planning and design of logistics structures. For the modelling of logistics structures, a generic description framework for production logistic sociotechnical systems, definitions for, amongst others, the central term logistics structure as well as a 3-layer-model and structure types for a more detailed material flow analysis and synthesis are provided. For the planning of logistics structures, the Method of Integrative Process and System Structuring (IPSS) is developed as a method for handling structuring problems. It can be applied especially to Competence-cell based networks as well as generally to production and logistics systems. For the design of logistics structures, scenarios as well as design and preference solutions for the material flow are derived.
209

Implementing Strategy through PPM in an Internal Development Department

Millard, Simon January 2023 (has links)
The focus of strategy research has long revolved around strategy formulation rather thanstrategy implementation, despite the evidence indicating that intended strategies are rarelyachieved. Project portfolio management, PPM, assumes a crucial role in enabling strategyimplementation and can be regarded as a representation of the organization's actual pursuedstrategy. Existing research on PPM has predominantly centered around portfolios in the contextof new product development, NPD, and research and development, R&amp;D. However, there hasbeen relatively less exploration of PPM within internal development departments, warrantingfurther investigation. To contribute to the understanding on strategy implementation throughPPM and its conditional factors, this qualitative case study expands the existing research bystudying the PPM process within an internal development department. The study wasconducted at the Business Improvement department, which oversees improvement projects forthe service branch of EnergyComp, a company specializing in the development of complexenergy solutions. Using an abductive research approach, a literature review was conducted inparallel with data collection and analysis. The empirical data was mainly collected throughsemi-structured interviews at the company, but also through meetings and companydocumentation. The results of the study show that PPM actions connected to projects, portfolio and resourceallocation are undertaken to effectively implement the organization's strategy within theinternal development department. Common to all areas is the importance of accurate andavailable information that effects the decisions connected to strategy implementation. On aproject level, Insufficient information poses challenges in accurately assessing project success,resulting in measurements that fail to cover all strategic objectives. In the context of theportfolio, the absence of project information and uncertainties can lead to a misalignmentbetween the actual prioritization criteria employed in the selection process and the strategicobjectives of the organization. Additionally, it may contribute to a less detailed and formalstrategic plan. Furthermore, the cost associated with adjusting the portfolio is directly linked tothe effort and expenses involved in obtaining project information. Regarding resources,insufficient information on supply and demand creates challenges in considering projectdependencies and synergies during the evaluation of project groups. Moreover, limitedtransparency across functional boundaries within the organization leads to a system wheredecision rules cannot be established at the portfolio level. Instead, it encourages bottom-uppriority decisions. Furthermore, a biased assessment by stakeholders in the functionaldepartments may result in an inadequate screening process, leading to an increased workloadin the portfolio structuring process. Finally, the large variation in project types, coupled withdiverse impact targets spanning individual and multiple functions, makes it difficult to createrelevant project categories for budgeting and portfolio structuring.
210

The structure, organization and functioning of manufacturing companies in South Africa

Raubenheimer, William Henry 11 1900 (has links)
The research problem that this study sought to address stemmed from a lack of knowledge about South African organizations and a dearth of empirical, quantitative research into organizations, organization structure and organization climate in this country. Five research hypotheses were formulated to address this problem and its attendant subpriJblems. A comprehensive review of the related literature and research was c~trried out and Organization Theory was traced to its earliest beginnings. A number of schools hased on Max Weber's bureaucratic ideal type were described and contrasted. Much attention was paid to the work of the Aston group m the United Kingdom and to their efforts to operationalize Weberian concepts and to incorporate them into a replicable body of quantitative research. Points of departure were re-examined and some new twists to Systems Theory and Structural Functionalism were considered. It was established that the demographic characteristics of both the sample and the population were similar enough for the results of this study to be generalised to the population with some degree of confidence. Much care was taken to test and validate each of the scales that comprised the questionnaire, and item analyses and factor analyses were carried out for every variable and group of variables. The measures developed in other parts of the world and by other researchers performed very well in a South African setting - as did the measures developed specifically for this study. Statistical associations and causal relationships between the various sets of variables, both at the sector level and at individual industry subgroup level, were sought by means of multiple regression analyses. Broad support was found for a 'culture-free hypothesis' that there are a number of stable relationships between organizations and their context; and these relationships will be constant in direction and strength regardless of differences in structures, or in contexts of structures between societies. Importantly, there were also a number of significant differences between this study and the findings of other studies which reflected South Africa's unique blend of developed and developing cultures and value systems. These differences provide fertile ground for future research in the field of Organization Theory. / Business Management / DBL

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