Energi är en resurs som måste användas effektiv för att undvika onödig negativ miljöpåverkan och utgifter. Återmatning från nedåtgående malmtåg till uppåtgående malmtåg leder till en effektivisering i energiutnyttjande. Beräkningen av den återmatade energin utgår ifrån tågets lägesenergi och förlusterna från räls, lutning, vind och kurvor. Totalt kan återmatning av energi ge en besparing på 20 % för enkelspår och 20 % respektive 21 % för dubbelspår. Dubbelspår kan ha mer trafik än enkelspår men förhållandet mellan konsumerad och återmatad energi är i princip den samma.

The Swedish Government has set a target to reduce energy consumption through energy efficiency within the construction and real estate sector. The purpose of the study is to examine how energy efficiency within this sector could affect the district heating volume in the future, on basis of Vattenfalls district heating system in Uppsala.An Excel model has been created to study how energy effficiency measures affects district heating demand in buildings by 2045, based on technical and economicalconditions. Furthermore, an interview study has been conducted to examine incentives for district heating customers to invest in energy efficiency measures.Result of the Excel model shows that the district heating volume of Vattenfall in 2045 is expected to 931 GWh, which corresponds to a volume decrease of 10,6 %. Based on the study?s theoretical framework only 15 %, 1 024 GWh, of the technical-economical potential is assumed to be implemented.

Rapid population growth and the fact that phosphorous is a limited resource implies that the question regarding an efficient use of phosphorus is of great importance, and consequently,that the phosphorous use efficiency should be as high as possible. The view on phosphorous use efficiency, and how this is calculated, has varied over time. This has had great implications on what type of research that has been conducted, which have resulted in an inconsistency between the academic?s view on the subject and recommendations received by farmers. The purpose of this paper is to calculate the phosphorus use efficiency in the Swedish long term fertility experiments.

Syftet med denna uppsats var att undersöka hur begreppet energi skulle kunna användas som en förklaringsfaktor i historieundervisningen. Undersökningen bygger på en textundersökning av tre av de mest använda historieläroböckerna för kursen Historia A på gymnasiet. Vi har studerat läroböckerna i olika nedslag, valda utifrån relevant miljöhistorisk forskning, för att se i vilken utsträckning och på vilket sätt historieläroboksförfattare använder sig av energi som en förklaringsfaktor. Utifrån läroböckerna och forskningen har vi diskuterat hur begreppet energi skulle kunna vara en central förklaringsfaktor i den historiska förändringsprocessen. Undersökningens resultat visade att läroboksförfattare i relativt hög grad använder sig implicit av energibegreppet i sina framställningar, även explicita exempel förekommer.

När Energimyndigheten 2008 frågade ungdomar om förnybar energi kunde 40 % av de tillfrågade inte namnge en enda förnybar energikälla. Användandet av förnybar energi är en del av den strategi som Förenta Nationerna [FN] har lagt fram för att nå en hållbar utveckling i framtiden. FN framhäver även vikten och behovet av att undervisa om hållbar utveckling och förnybar energi.Vi ville studera vilka förnybara energikällor som förekom i läroböcker för grundskolans senare år och gymnasiet. Detta för att få en uppfattning om hur lärare kan använda läroböckerna i framtida undervisning om förnybar energi.Vi har gjort en kvantitativ innehållsanalys av energikapitlet i olika läroböcker där vi har studerat hur området förnybar energi presenterades, bland annat utifrån perspektivet scientific literacy.Våra resultat visar signifikanta skillnader mellan läroböckerna för gymnasiet och grundskolans senare år. Bland annat presenteras många fler energikällor i läroböckerna på gymnasiet, och de presenteras även på ett sådant sätt att de ingriper flera områden av perspektivet scientific literacy.

In today?s fast growing and closely connected society, a reliable and energy efficient transportation system is more than ever desirable. Nowadays the significant part of the transportation sector?s energy demand is supplied by fossil fuels.Improving energy efficiency in combustion engines will result in reduction of fuel consumption and CO2 emissions. A modern internal combustion engine has an efficiency of 30-45 %, where the most energy loss occurs as result of heat losses in the exhaust and cooling systems.

I dagens samhälle förs det diskussioner hur vi kan sänka vår energiförbrukning i olika sektorer. En av dessa sektorer som förbrukar mycket energi är IT sektorn. De mätningar som har gjorts i USA visar att år 2011, så har energiförbrukningen för datacenters fördubblats jämfört mot år 2006. Strategier har tagits fram för att sänka energiförbrukningen för datacenters och då framför allt på servrar och kylsystem. Dessa strategier benämns med allmäna ordalag Grön IT.

The purpose of this research is to examine the implications of the provisions in the Swedish Code of Corporate Governance (the Code) concerning auditor attestation of the internal control report. We will focus on how the auditors? augmented responsibilities will affect the efficiency in the audit process.Our research indicates that the main benefit from reviewing the internal control report is achieving more reliable internal controls, which results in greater prevention of misstatements in the financial statements. This will affect the efficiency in the audit process since the auditor can place more reliance on internal controls when performing audit procedures. This implies that the benefits of preventing misstatements could outweigh the efforts and resources spent on reviewing the internal control report..

Energy efficiency has become a very topical issue that has been discussed throughout the European Union for preventing negative environmental impacts that have been associated with the consumption of energy. In the residential sector have mainly municipalities set strict requirements for the reduction of energy consumption while the renewable energy has been asked. Different concepts of low-energy buildings have been developed to reduce the cost of operation and maintenance in existing buildings such as in new ones.This thesis has aimed to minimize the energy cost of a large building which has had low energy consumption features originally. Energy reviews has been initiated in order to be able for showing how the house electricity could be carried out even more efficiently.The work was initiated through a literature study to clearly increase the reliability on the energy subject. Different concepts of low-energy buildings have been treated in connection with its specifications, afterward those have been compared with the obtained results.

The E-department at GETRAG All Wheel Drive in Köping have problems with the efficiency on parts of their production equipment. The equipment with the most significant efficiency problems are four automated multifunctional production cells that produces housing for rear drive units. The major part of the problem is the large amount of small stops that causes the low efficiency.The department already worked with logging of interruptions and efficiency calculations before this project started. However this work was not done to the extent considered necessary for a systematic follow-up of the interruptions.The aim of this paper is to point out a more effective and systematic way to work with logging of interruptions and the follow-up. In addition the equipment were studied with a method for efficiency calculation that ? if used properly- is a more powerful and a visually better method than the one used by the company today.As the initial current state analysis of the equipment was made a lack of documented knowledge about the equipment was discovered.

Title: Audit teams ? what affects the efficiency?Authors: Petter Johansson and David RubinSupervisor: Andreas JanssonCourse: Dissertation Accounting, 4FE03E, 30 ECTS, Spring 2011.Key Words: Audit team, Efficiency, Team WorkBackground and problem: Theory and literature in the field of audit teams?efficiency are limited. The theory and literature that existed was not conducted inSwedish context. It was identified that no one had examined the factors thatinfluence the efficiency of the Swedish audit team's. Efficiency affects howresource-and cost-effective an auditing firm can be while the audit is performedwith quality and therefore it is of interest to be examined.Purpose: The purpose of this thesis is to explore and explain what may affectSwedish audit teams? efficiency during the work processMethod: The thesis has been based on existing theory and literature to explainwhat affects audit teams? effectiveness.

Med ett energikombinat vid Lillesjöverket vill Uddevalla Energi energieffektivisera samt sänka temperatur på återkommande fjärrvärmevatten, för att kunna utnyttja rökgaskondensorn effektivare. Uppdraget var att utreda mängden tillgänglig energi under sommarhalvåret och utföra en matematisk kalkyl som ska ligga till grund för val av tork. Valet stod mellan två alternativ av tork där storlek på värmeväxlararea och investeringskostnad skilde dem åt. Sedan följde dimensionering av fjärrvärmeledning samt cirkulationspump från fjärrvärmenätet till tork. Syftet var att ge Uddevalla Energi ett tekniskt beslutsunderlag för val av storlek på tork samt dimensionering av energiöverföring till densamma.

Poly- and perfluoroalkyl substances (PFASs) are a group of environmental contaminants that have gained increasing attention due to their potential to bioaccumulate, environmental persistence and potential toxicity. PFASs have been found in surface water, sediment, air, soil, sludge and ice caps globally, as well as in wildlife and humans. Furthermore, PFASs have also been detected in drinking water, leading to raised concerns for human health, since drinking water is one of the most significant sources of PFASs for the general population. Conventional water treatment techniques have shown to be ineffective removing PFASs, highlighting the importance for further research to develop efficient removal techniques. The aim of this study was to investigate the removal efficiency of PFASs in water using two treatment techniques; granular activated carbon (GAC), type Filtrasorb 400®, and anion exchange (AE), type Purolite A-600. Additionally, the effect of dissolved organic carbon (DOC) on removal efficiency was studied.

Swedish healthcare is in continuous need of cost savings and efficiency improvements in order to meet the increased demand for care. The theories of lean, developed from the industry, are applied more frequently on healthcare systems to increase effectiveness and reduce waiting times in patient processes. However, some processes seem to be more successful in their lean implementation than others. In this thesis, factors influencing flow efficiency in lean healthcare are examined. Through interviews with the top executive board at Capio St Göran's hospital, data is collected in order to analyze reasons for success.

The main focus of the essay is to investigate if bugging can be justified from two ethics perspectives, the teleological and the deontology. I?ve chosen to emanate from two specific values which I believe is especially relevant to the ethical problems of bugging, efficiency in fighting crime and the personal integrity. To be able to illustrate this conflict between different values did I do an analysis of an official report which had the task to explore if Sweden should introduce bugging as a new means of compulsion. The official report's statement was that the police should have modern instrument to fighting crimes efficient, including bugging.My examination of the report showed that they used several arguments derived from both the efficiency in fighting crime perspective and the personal integrity perspective.