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3943 Uppsatser om Power supply unit (PSU) - Sida 59 av 263
Höghöjdsanpassning av BvS10 : Konceptstudie för optimering av överladdningssystem
This report relate a concept study that consider a number of different proposals to improve the overcharging system in BAE Systems Ha?gglunds tracked vehicle series BvS10, to maintain sealevel power at extreme altitude.At high altitude the power losses beacuase of the air density that decreases, which results in less fuel can be burned. The decreasing of air density also gives rise to fatigue failure of the turbocharger unless power is reduced.The proposals shall be as required by BAE Systems Ha?gglunds economically sustainable and defensible from a packing perspective. That means the selected solution must have a reasonable price tag and at the same time a minimal impact on adjacent components.The basis for this thesis is based on benchmarking of both the auto industry as the flight industry, to find inspiration and tips for improvement.Some of the concepts have after gathering facts and calculations been excluded while other solutions has been considered as workable and thus interesting for BAE Systems Ha?gglunds.Initially the current turbochargingsystem was analyzed in order to determine the starting point and thus be able to fix the current problems surrounding high altitude driving.
När handling säger mer än ord
The purpose of this paper is to present a possible understanding of why the company Tekola is segregated according to sex. In accordance to this purpose, an understanding of how the segregation affects the employees in relation to power, values and possibilities is discussed. The theoretical understanding is that the organization of men and women within Tekola is done in close connection to creation of the meaning of gender in Tekola. This, in turn, affects and is affected by the recruitment to and within the company. Through the study of statistics from a survey, five interviews with employees and former employees and Tekolas? equality plan, we are able to see the possible existence of a glass ceiling, and a culture of homosociality, which affects the possibilities of women to enter the company and also to gain full entrance to power-positions in a negative way.
Sista generationens renskötare?
The purpose of this paper is to present a possible understanding of why the company Tekola is segregated according to sex. In accordance to this purpose, an understanding of how the segregation affects the employees in relation to power, values and possibilities is discussed. The theoretical understanding is that the organization of men and women within Tekola is done in close connection to creation of the meaning of gender in Tekola. This, in turn, affects and is affected by the recruitment to and within the company. Through the study of statistics from a survey, five interviews with employees and former employees and Tekolas? equality plan, we are able to see the possible existence of a glass ceiling, and a culture of homosociality, which affects the possibilities of women to enter the company and also to gain full entrance to power-positions in a negative way.
Störs laxens lekvandring i en kraftverkspåverkad älvsträcka? :
The upstream spawning migration of Atlantic salmon (Salmo salar) at the confluence
area between the power-station outlet and the bypass-channel in river Umeälven (flow 430
m3s-1) was compared in 2004 and 2005, two years with different experimental flow-regimes.
In 2004 the water flow in the bypass-channel was altered during the day with increased
flows during the nights while the water flow in 2005 mainly was altered between the
weekdays and weekends. Salmon showed altered migratory behaviour in this confluence
area, assessed with telemetry (n=116) and echo-sounding, with up- or downstream responses
depending on flow-changes in both the bypass and the power station outlet. Increased
turbine flow through the power-station generally attracted salmon into the tunnel outlet area
while increased spill-flows facilitated salmon to enter the bypass. Echo-sounding in the
confluence area showed an increased swimming activity up- and downstream due to time in
the day and flow-rates through the tunnel outlet. No changes in activity could be detected
due to increasing or decreasing flow through the hydro-power facility.
Anställdas attityd till miljön och miljöledningssystemet: ALSTOM Power Sweden AB
Today environmental management systems (EMS) are common documents (more correctly, a combination of documents) that direct, steer and regulate environmental efforts within many companies. The intention of EMS is that its guidelines are reflected in how the employee carries out his everyday work tasks. This study aims to illuminate the attitudes that exist regarding the EMS at ALSTOM Power Sweden. By using questionnaires and interviews as a method to communicate with employees,a study of the existing attitudes regarding the EMS was carried out. The results were analyzed categorically and statistically and show that there are consistent attitudes among employees, but that there are also inconsistent attitudes.
Bibliotekets betydelse för läsutvecklingen. En enkätundersökning av elevers förhållande till bibliotek och litteratur jämfört med deras läsutvecklingsresultat
Abstract: The aim of this study is to investigate the attitudes towards the labour movement?s strategies, goals and organisational issues in Swedish Miners? Union?s (Gruvindustriarbetareförbundet, hereafter Gruv) paper, Gruvarbetaren 1917-1925.The theoretical starting point is Engels? view on the class state. This perspective turns the question of socialism and the way to get there into an issue of working class power over the state. Another theoretical perspective is the partition of the labour movement into a trade-unionistic branch, seeing unions as financial organisations of interest, and a pro-state one, considering unions as political organisations.During the period investigated Gruvarbetaren was quite radical and advocated a firm class struggle strategy towards employers. Since these were considered unreliable, class struggle was seen as the only way to better the conditions for the working class.
Hur enkel- & dubbelportsturbin i kombination med två olika avgassamlare påverkar gasväxlingsprestanda på en Scania V8
The exhaust arrangement on a Scania V8 consists of one manifold at each bank connected to a twin entry turbine (8-2-2). A study in GT-Power has shown improved performance and reduced cylinder to cylinder variations using two manifolds at each bank in combination with a single entry turbine (8-4-1). This thesis work analyses the difference in performance shown in simulation and verify it by engine test.The initial work was focused on simulation in GT-Power. Investigating how exhaust manifold volume and pulses effects the turbine efficiency and the mean effective pressure during the gas exchange. To verify GT-Power simulations four engine tests with different exhaust arrangement have been made.The results from GT-Power simulation indicate that a larger exhaust volume improve the turbine efficiency.
Test och verifiering av en ny inkapslingsmetod för SiC BJT och MOSFET
The use of silicon carbide (SiC) as a base material in power electronics has manyadvantages, including high breakdown voltage and excellent temperature endurance.However, the packaging of such electronics presents major challenges and there is aneed for packaging that can operate in higher temperature. The purpose of this thesishas been to develop a test method and verify the functionality of SiC powertransistors prototypes with a new packaging technique developed by Swerea IVF AB.It includes setting up an electrical test-bed for power and high temperature cyclingand analysis of the results. Even though test confirmed functionality after thepackaging process, (at room temperature) the performance seemed to have been reduced. This could be a result of the measurement setup and the packaging process.In higher temperature the transistors failed to operate longer than a couple ofminutes which showed the weaknesses in the design and the challenges with this typeof packaging..
Att etablera ett tredjepartslogistikföretag i Kina
Syftet med detta examensarbete är att ur ett Supply Chain Management perspektiv undersöka förutsättningar för att implementera ett tredjepartslogistikföretag från EU i ett växande industriområde i Kina. Detta examensarbete fokuserar på distriktet Xiaohe i staden Guiyang i provinsen Guizhou.Logistikbranschen är en av de snabbast växande industrierna i Kina. Den kinesiska regeringen föreslår en främjande policy för en logistikexpandering som innefattar skattereduceringar och nedsatta priser på lokalhyra och markpriser för logistikföretag. Den största skillnaden mellan marknaden i EU och marknaden i Kina är de kulturella skillnaderna i sättet att göra affärer och att umgås. Korruption kan förekomma i Kina och det är värt att undersöka de kinesiska företagen innan ett samarbete inleds.
Kraftvärmeverk i glesbygd - en möjlighet?
Our purpose in this paper is to examine if there is any profitability for a company with a factory in the timber industry to invest in a combined heat and power, CHP. Based on analysis and the results that the paper generates, we will give Derome AB a suggestion on how it is a profitable investment or not to installing in a CHP.By investing in a CHP plant, you can get a high efficiency, which means that companies can use their resources more effectively. The Swedish wood industry has by-products of production that can be used for combustion in their boiler which is an advantage.The essay is a qualitative study where we have a case company, Derome AB. In this company, we interviewed two employees who have knowledge in the study. They have helped us to provide information and data about their business.We chose to use the pay-off- and the net present value method, NPV, to see if there are profitable advantages for the investment.
Snabbast vinner? : en studie om hur e-handelsföretag inom modebranschen arbetar med korta ledtider
PurposeThe purpose of this thesis is to provide a deeper understanding of how e-commercecompanies within the fashion industry are working with lead times and illustrate andanalyse differences and similarities between companies.Research question- In which ways are e-commerce companies within the fashion industry working withshort lead times?MethodologyThis thesis is based on a qualitative research method in order to achieve a greaterunderstanding of the chosen topic, of how the chosen companies are operating and toprovide room to our own interpretations and reflections. Interviews through telephonewere used to gather the empirical data from six different e-commerce companies withinthe fashion industry.ConclusionsAfter completing the theoretical and empirical analysis it can be concluded that leadtimes are considered essential for all of the participating companies but there is adifference in which way they look at, and how they work with lead times. Somecompanies stressed that short lead times are an important aspect of competition andclaimed that this is something they are constantly working with. For others the balanceand matching of supply and demand was the most important factor rather than toachieve short lead times.
VMI - informationsutbyte i koncernrelationer
Till följd av marknadens utveckling har beroendet av informationsutbyte och samverkan i olika nätverk ökat. De senaste årtiondenas fokus på informationsutbyte och samarbete ledde till att Supply Chain Management uppstod. Flera forskare har karakteriserat lyckad styrning av samverkan som en kärnkompetens som krävs för att vara konkurrenskraftig. Ägande och kontrollfunktioner som tidigare låg inom samma verksamhet har förändrats och tillämpningen av VMI har uppkommit. VMI innebär att leverantören övertar ansvaret för lagerstyrningen hos kunden.
Förutsebara skador och adekvata följder : En omtolkning av 67 § köplagen
Syfte: Syftet med denna uppsats är att studera om förändringar i arbetet med rörelsekapital hade ett samband med lönsamheten i företag. Som mått på rörelsekapital används Cash Conversion Cycle och som mått på lönsamhet används ROA.Teoretiskt perspektiv: Den teoretiska referensramen består av teorier om Working Capital Management, Cash Conversion Cycle, Lean, Supply Chain Management och Supply Chain Finance.Metod: I denna uppsats används en kvantitativ metod där sekundärdata samlas in från årsredovisningar för 2005 och 2013. Denna data ligger till grund för fyra korrelationsanalyser. Den beroende variabeln i korrelationsanalyserna är ROA och defyra oberoende variablerna är Cash Conversion Cycle, dagar i lager, dagar som kundfordring och dagar som leverantörsskuld. Urvalet i denna studie består av svenska aktiebolag inom branschen tillverkning och industri med fler än 50 anställda.Empiri: Empirin består av fyra tabeller som presenterar de beräkningar som gjorts.Slutsats: Sambandet mellan förändring i Cash Conversion Cycle och förändring i ROA blev väldigt svagt positivt men inte signifikant.
Actor interaction in the EIA process in Sweden : case study of Tönsen wind power park project
In the growing concern for the state of the environment more tools are being integrated in the decision-making processes. Sweden actively makes use of environmental impact assessment (EIA), which is supposed to minimise negative impacts of a project, policy or plans on the environment. The EIA process in Sweden still requires certain improvements to be more efficient. In this study actor interaction was analysed with trust being the framework for analysis. The aim is to find out whether it is possible to use trust as a framework for analysis since trust research is very discipline dependent.
Wireless Trailer Connection
Today's communication solution between the vehicle and trailer is one many see as anon-viable solution, then breakdowns on both the lights and cables are common. Now, anew innovation enters the market, a system that can transmit wireless control signalsbetween the vehicle and trailer.Parvus and Zap, the two solutions that the projekt group has come up with during thisthesis work carried out over the last year on Utvecklingsingenjörsprogrammet.Technologists Peter Jägevall and Christopher Åberg has developed this project on theirown. The group has developed various concepts and chosen to work on, two of them.The project has resulted in this report and a prototypeThe solution that the group has developed is a wireless communication between vehicleand trailer. The project team has developed new power-efficient LED lighting fixtures inorder to implement an internal power source in the trailer. The result of this has becomea maintenance-free and wireless product to trailers.