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400 Uppsatser om Computational Fluid Dynamics - Sida 16 av 27

Dynamisk modellering av kärnreaktor

The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant.

Decision making and the role of empathy in animal ethics committees (AECs)

Ethical evaluation of scientific studies carried out using animals is legally mandated in many countries and has been so in Sweden for over three decades. The animal ethics committees (AECs) responsible for the task have however been subjected to criticism; common critique being that the wrong issues are discussed and that the ethical evaluation is thus incomplete, that there is a lack of coherence across committees and that the committees are not as democratic as they might appear. This study investigates the view of Swedish AEC members on a number of issues in order to shed some light on the mandate and functioning of the committees, and on the grounds for ongoing criticism. In a survey and interviews AEC members and other persons connected to the committees gave their views on the AEC task in relation to their roles, the ethical evaluation per se and whether or not emotions such as empathy play any part in it. There were significant differences found between AEC member categories and several issues were encountered, many of which have been stressed in previous studies.

Intressekonflikten mellan polisiära spaningsmetoder och förhör

This essay is about the meeting of the pedagogic mission and the reality of the conditions in preschools. It is about the frustrations that I, as a pedagogue, experience when I cannot fulfill this mission. An example of this is working when understaffed.My purpose is the acknowledgment of two main areas of the curriculum: caring and learning. This essay demonstrates the diversity of the occupation and it ?s constant need of positioning.

Överföring av kunskap : från spel till verklighet

Denna undersökning behandlar spel i kontext till lärande och matematik. Genom att gestalta ett spel undersökte vi, författare hur olika designval kunde påverka lärande. Målet var att spelare skulle lära sig genom situationsbaserat lärande och där genom få möjlighet att överföra sin kunskap till sitt vardagsliv. Undersökningen hade sin utgångspunkt i ANT (actor-network theory) som användes som metodologi för att analysera och reflektera över de val som gjordes. MDA (Mechanics Dynamics Aesthetics) användes som ett ramverk för att utveckla själva gestaltningen.

Momentfördelning i pelardäck av armerad betong

The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant.

Kvalitetsarbete i samband med byggande av betongkonstruktioner

The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant.

En jämförande studie av fluiddynamiken för olika fluidiseringsmedium i en kallmodell av en 100 kW-anläggning för kemcyklisk förbränning

To reduce emissions of carbon dioxide (CO2) Carbon Capture and Storage (CCS) technologieshave been developed. Chemical Looping Combustion (CLC) is a CO2 capture technologywith the CCS framework, and at Chalmers University of Technology in Gothenburg,Sweden, a 100 kW chemical looping combustor has been built.This project aimed to investigate to what degree air can replace helium as the uidizinggas for uid dynamical studies in a CLC cold ow model of the above mentioned 100 kWfacility. Experiments were performed using air and helium separately as uidizing gas andpressure data were obtained, which formed the basis for the comparison. The project alsoaimed to investigate uid dynamics in the uidized bed and study when the risk of sluggingoccuring was greatest. The results were presented in the form of figures and tables dividedinto pressure, concentration and standard deviation of the pressure.The results obtained showed that air as uidizing gas did not create the same uid dynamicsas helium over the entire fuel reactor.

Kunskapsspridning inom projektbaserade företag

Background: Society of today is characterised by greater dynamics and a constant demand for innovation and fresh ideas. This development is often named "the new economy" or "the knowledge society". Independent of how one chooses to name this society, most individuals seem to agree upon the fact that knowledge grows more and more important. New competencies, such as new knowledge and new forms of organising, will be demanded for corporations to be successful in the future. In recent years it has become more common with corporations based on projects.

Identitetsskapande och socialisering i onlinespel : Formandet av en digital identitet

As social interactions migrate to the ubiquitous Internet we are facing a change in theway we relate to each other, which presents interesting new opportunities foranonymity to create identities. An aspect of this radically evolving technology thatexhibits strong possibilities for altering or producing identities is the rapidly growingonline game genre MMOG (Massive Multiplayer Online Game) which isentertainment that millions of people all over the globe engage in daily. Thisrelatively new platform for socialising has become of cultural and social significance,which is why it calls for examination and research. Thus, the main research questionsasked in this thesis are as following: How does players of MMOGs utilise the nighcomplete anonymity to present or modify their identities online? In which ways areMMOGs used as a platform for socialising and development of social groupdynamics? After observing a large group of players in a popular MMOG, as well asconducting several interviews with key identities within the group, I discovered three fundamental parts of identity creation, and created a model for use and applicationin different social situations and constellations..

"democracy in doses"? - en studie kring demokrati och Egypten under Mubarak

AbstractWhy don't (some) regimes with formal democratic features undergo transition to democracy? Which are the internal dynamics of these regimes that can offer comprehension to this state of affairs? The main purpose of this thesis is to advance the above questions, and, on a lower level of abstraction, examine the case of Egypt. The Egyptian regime is characterized by, for instance, a multiparty-system, steps toward economic liberalization, and some level of persistent state opposition, and has been considered on the way to liberal democracy, but can still hardly be estimated as such.Thus, the thesis takes part in a theoretical framework on democratization, and further analyzes the case of Egypt on grounds of socioeconomic development, political culture, and class configuration. By this contextual approach, the thesis adduces that a low level of modernization, an incomplete democratic political culture, and a bourgeoisie supported by the state are impending significant factors. The thesis additionally remarks on the interconnection of the adopted theories, and discusses a potential need for new theoretical propositionsA secondary aim of the thesis also gives some insights into the concurrence of regime stability and the absence of democracy in, what often could be labelled, authoritarian regimes.

Diskret ickelinjär analys av geometriskt föränderliga linsystem

The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant.

En bakgrund till skadorna på Slussens bärande konstruktioner

The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant.

Energikartläggning i Sundbybergs stad

The purpose of this thesis has been to develop a tool for modelling and simulating the nuclear plant Ringhals 3. The model should be used to improve the knowledge on the dynamics of the plant. Ringhals 3 is being upgraded to produce more power and a tool for analyzing the new operating conditions is needed.The work in this thesis has consisted of improving and developing an existing model of Ringhals 3 made with the modelling tool Dymola. The model has been validated by comparing the results of a simulated house load transient with data from the actual plant. Validation shows good agreement with data from the real plant.

Lättlösliga kolhydrater i vallfoder och i hästens grovtarm :

The purpose of this study was to investigate how the content of glucose, fructose, sucrose and fructan (WSC) varied in silage, haylage and hay harvested from the same field and at the same time of harvest. The study also investigated if differences in the WSC-fraction in the forages caused differences in composition of WSC in the colon of horses fed the forages. Hay, haylage and silage were harvested in the first week of June 2005 and stored for about nine months before feeding. Horses that were fistulated in right ventral colon and caecum were used, but only the colon fistula was used for sampling. The fresh crop and the conserved hay, haylage and silage were analyzed for chemical composition and WSC-fraction.

Perspiratio- en del i vätskebalansen? : Enkätundersökning på Sveriges intensivvårdsavdelningar för vuxna

Bakgrund: I intensivvårdssjuksköterskans arbetsuppgifter ingår att räkna och registrera vätskebalans. Normal perspiratio är mellan 800-1100ml/dygn. Vätskeförlust via perspiratio är svårberäknad och hos den kritiskt sjuka patienten är de individuella skillnaderna ännu större och perspiratio kan bli större än normalt.Syfte: Att undersöka om perspiratio räknas in i vätskebalansen samt vilka faktorer som påverkar beräkningen.Metod: En empirisk, deskriptiv och analytisk studie med kvantitativ ansats. Datainsamlingen skedde genom frågeformulär utdelade till vårdenhetschefer på intensivvårdsavdelningar i Sverige.Resultat: Studien visar att på intensivvårdsavdelningarna var det vanligast att vätskeförlust via perspiratio räknas in i vätskebalansen. På dessa intensivvårdsavdelningar fanns skillnader i vilka faktorer som påverkade beräkningen.

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