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402 Uppsatser om Computational Fluid Dynamics (CFD) - Sida 19 av 27

Konstruktion av testrigg för moderna ångexpandrar

This report summarize what have been done during the Master of Science Thesis that Klas Schjelderup has written for the company RANOTOR Utvecklings AB. The company is developing modern steam engines and this work should develop a machine to perform tests on a new type of piston seal that hopefully could be used in the future. The steam engines will be both volumetric and energy compact, around 1600hp/literof cylinder volume, and it will have a lot of practical applications.The new type of piston seal is hydrostatic lubricated which means that a fluid is separating two faces that normally is in contact. In this case pressurized water is used to separate the piston seal from the cylinder wall. RANOTOR have earlier formulated that at least the expander in the modern steam engine have to be oil-free, due to other components functionality in the closed water system.

En skildring av hur tredje världen framställs inom ett urval av västerländsk barnlitteratur utifrån en postkolonial teori : En kvalitativ textanalys

In recent years, the characterization of the Third World and its inhabitants in West-originated children?s books has been subject to debate. Media attention around a selection of books has generated discussions on how this relates and aligns with Sweden?s national teaching curriculum. The objective of this study is to explore how a selection of authors, born in Western countries, have characterized and presented the Third World and its inhabitants in its literature.

Egenvård vid hjärtsvikt- en enkätstudie om vilka egenvårds åtgärder personer med hjärtsvikt säger sig använda i det dagliga livet

Heart failure is an illness that requires life-long treatment and often affects everyday aspects of a person?s life. Self-care is a significant part of the treatment. Good self-care resources make it possible for people with heart failure to make the lifestyle changes they often need to maintain or improve their level of health. Self-care means having knowledge of and being able to recognize the symptoms and signs of deterioration that can occur with heart failure, so that the person can take appropriate measures ? and it also means knowing when it is time to seek professional help.

Motivation bland v?rnpliktiga n?r v?rldsordningen f?r?ndras: En intervjustudie om hur v?rnpliktigas motivation till fortsatt yrkesmilit?rt arbete p?verkas.

This study takes its starting point in ongoing changes and differences in the global power dynamics. The liberal rules-based world order that has been acknowledged for governing the world with the US as the hegemon of power has been strongly challenged during the last decades. Russia?s invasion of Ukraine can be seen as an example of ongoing changes in the world order, with Russia as a challenger to the US as the hegemon of power. The changes and instability that this has led to for Sweden's national security situation can be seen as a concrete example of how ongoing changes in the world order affect Sweden?s foreign policy.

Design av stimuligenerator för radarmålsökare

During the development of microwave based sensors such as radar target seekers, input signals are needed to verify the performance of the system. Therefore, a channel board has been developed by previous thesis projects at Saab Bofors Dynamics. It uses a technique called Digital Radio Frequency Memory (DRFM). The purpose of this board is to sample and digitally store radio frequency signals in order to reconstruct them after a certain delay.The aim of this thesis project was to use the channel board named above to construct a portable instrument for generation of stimuli signals. This assignment has been divided into two tasks: firstly, to construct and put together the hardware components and secondly, to implement a graphical user interface for the instrument.

Familjevård, Kultur och Etnicitet: rekryteringsprocessen ur ett kulturellt och etniskt perspektiv

Children are said to be the future of our society. Hence, how we take care of our children is a cause of concern. This is evident in much of the social work that is carried out in Sweden. One of the times when we find children to be the most vulnerable is when they, for different reasons, are separated from their biological families and placed in foster care. Based on the fact that Sweden over the last century has experienced an increased immigration intake we wanted to take a closer look on how this change of the population dynamics has influenced foster care in the country.

Lätta bromsok

SAAB Automobile ABis a car manufacturer within General Motors corporate group. SAABAutomobile ABhas a big part of the responsibility for the brake development in the corporategroup. The car industry is facing harder environmental requirements, which influence the brakedevelopment. The focus is to develop brakes with low drag and sustained brake feeling andperformance. Important characters for the brake caliper are high stiffness and low weight, highstiffness results in high performance and low weight is important because it is unsprung mass.This thesis investigates the possibility to improve the performance of the brake caliper for aGMproject.

Korrelering mellan optiskt och akustiskt avbildade objekt på havsbotten

Examensarbetet har gått ut på att undersöka om det är möjligt att jämföra foto- grafier på havsbotten tagna med en kamera monterad på SAAB Dynamics farkost AUV-62, här kallad Sapphires, med SONAR-bilder tagna från samma farkost men vid ett annat tillfälle. Föremål avbildade med kamera och sidriktade SONAR:er delar i normalfallet inte visuellt utseende och är därför svåra att jämföra. Meto- den som valts för att jämföra kamera- och SONAR-bilderna grundar sig av denna anledning inte på föremåls individuella utseede utan på mönster skapade av flera föremål. Föremål i bilderna identifieras som objekt, vilka beskrivs med en posi- tion i long. lat.

Skolans Fostrande Roll En studie kring arbetsmetoden "Bra Val"

Abstract Knutsson, Henrik (2008). Skolans Fostrande Roll, En studie kring arbetsmetoden ?Bra Val? School´s Educating Role A survey about the method Making Good Choice Examensarbete 15 högskolepoäng, SÄL 3:2, Lärarutbildningen, Malmö högskola I min undersökning har jag försökt ta reda på hur eleverna på ett individuellt utformat program i Malmö, uppfattar arbetet med den individuella bedömningen av genomförandet av lektioner som vi kallar Bra Val. Metoden Bra Val har sitt ursprung i trappmodellen, Det är ditt val, hämtat från boken Ordning och reda i skolan, skriven av Edin och Drummond (2006). Arbetet bygger på att lärarens ledarskap skapa förutsättning för en social utveckling i skolan.

Smältbarhet på ensilage och hö hos hästar i träning :

Horses are made to eat mainly roughage and it is essential for optimal health to offer them an appropriate amount of roughage with good hygienic and nutritional qualities. To produce good hay at the right time and be able to keep the hygienic quality until next summer is a problem. This has the effect that horse owners today choose haylage and silage to a larger extent. Science in this area is scarce, i.e. if the change from hay to silage has any effect on the horse.

USA versus al-Qaida : linjärt tänkande mot asymmetriska metoder - en studie kring den amerikanska problematiken i kampen mot terrorismen

Syftet med denna uppsats har varit att undersöka på vilket sätt attacker utförda av al-Qaida kanhänföras till begreppet asymmetri och på vilket sätt man kan tolka den amerikanska administrationensrespons på dessa som uttryck för ett linjärt tänkande. Vidare vill jag undersöka vilka svårigheter somkan uppstå i relationen mellan en linjär omvärldsuppfattning och asymmetriska metoder. För attuppfylla syftet med uppsatsen kommer tre av al-Qaidas attacker att studeras. Dessa är: attacken mot deamerikanska ambassaderna i Afrika, 1998, attacken mot USS Cole, 2000 och attacken 11 september,2001. Rapporterna från den amerikanska administrationen efter respektive attack kommer att utgöragrunden i mitt empiriska material.

Koordination i förändring : En balanserad historia om kunskapsintensiva företag

Background: The dependency on knowledge and competence today is more critical than earlier. Today, companies need to put more effort into identifying and filling knowledge gaps, which can be achieved through mergers and acquisitions. It is important that the companies succeed in coordinating their operations after this process of change. Out of a theoretical point of view it can be argued that companies need to balance between different coordination mechanisms that result in standardized and flexible coordination respectively. Purpose: The purpose of this Master Thesis is, in the context of a merger, to investigate and analyze which coordination mechanisms that are used in knowledge-intensive companies, how these coordination mechanisms are combined and what explains the chosen combination.

Studie av mobilt integrerat navigationssystem

Saab Bofors Dynamics har som huvudsaklig verksamhet att utveckla missiler. Ofta krävs det att någon form av navigationsfunktion byggs in, och eftersom det inte är lätt att testa nya lösningar och algoritmer direkt på missilerna har man tagit fram två autonoma testplattformar, Freke och Gorm, i form av självgående bilar som kan ta sig fram inomhus i t.ex. en korridor.För navigation utomhus lämpar sig GPS väl i många situationer, men i autonoma sammanhang är det inte tillräckligt. GPS är inte alltid tillgänglig på grund av att man inte alltid har fri sikt till minst fyra satelliter och i militära sammanhang är den också lätt att störa ut. Därför förlitar man sig hellre på noggranna tröghetsnavigeringssystem (TNS) som kan ge data i 100-tals Hz, och kompletterar med GPS för att korrigera för avvikelser.

Population and management models for the Swedish wild boar (Sus scrofa)

The wild boar Sus scrofa population in Sweden has increased rapidly in the last decades which has led to conflicts among stakeholders, for example due to crop damages in agriculture. Thus, there is an urgent need of quantified goals and effective strategies for wild boar management. To develop such strategies, knowledge on population dynamics is fundamental. In this study a deterministic matrix model was used to estimate population growth, based on previously published data. The exponential growth rate for a wild boar population was calculated to 1.48.

En studie av retentionen i floden Oder och dess avrinningsområden, Polen.

Nutrient enrichment is the main cause of the increasing eutrophication process in the Baltic Sea during last century. A prerequisite counteract this process the load of nutrients to the Sea must be investigated. The large contribution of nutrients to the Sea is caused by emission from the rivers within the drainage basin. For the total emission of nutrient into the Sea the retention process in the rivers has big influence. This process in the river system has been assumed as a not important part of the nutrient cycle.

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