Sökresultat

Simulering kan förbättra hanteringen av järnvägsstörningar Förseningar i järnvägssystemet kostar årligen såväl industrin som samhället miljardbelopp. Därför är det viktigt att minimera tiden som ett tåg står stilla efter en störning, som till exempel ett kontaktledningsbrott eller en personpåkörning. I examensarbetet presenteras en simuleringsmodell som kan användas som ett verktyg för att hitta Within the Swedish rail network, maximum track capacity is reached on multiple sections with costly delays as a result. Therefore minimizing the time a train is stationary after a disruption such as overhead line damage or suicide is important. Prior work has mapped stakeholders within the management of the two scenarios, but due to complexity, finding effective means of improvement is difficult.

This thesis explores the morphological integration of Standard Average European (SAE) words into Modern Standard Arabic (MSA). The topic constitutes a challenge insofar as SAE and MSA are typologically very different, and integration of words from SAE into MSA should therefore be generally difficult. Loanwords were selected from a collection of contemporary short stories and filtered through a Mod

Kaskadeffekter inom samhällsviktig verksamhet Det är först när man rullar in trettio minuter försenad på perrongen, som man inser hur kritiska vissa infrastrukturer är för samhället. Ibland beror de här felen på störningar från andra system, så kallade kaskadeffekter. Alla som har växt upp på landet, speciellt innan Gudruns framfart ledde till åtgärder, är plågsamt medvetna om hur jobbigt alltiMost current methods for studying cascading effects rely on written sources to extract information. This thesis presents an empirical method for studying cascading effects, when little written information of the event is available. The method presented has been influenced by incident investigation methods. It has been applied on a case of flooding in south of Sweden and revised based on the result

The aim of this report is to find cost-efficient fire safety solutions for saving lives due to fires in Swedish apartment buildings. This is done by evaluating existing systems through a cost-benefit analysis based on the value of a statistical life. The fire protection systems potential effects for different types of fires are evaluated based on a scenario analysis of the most common deaths due t

Personer med utvecklingsstörning kan bli begränsade i att knyta kontakter och utforska sociala sammanhang. Tidigare forskning kring social interaktion riktar sig framförallt mot barn med diagnosen autism och Asbergers syndrom. Ingen studie har tidigare belyst upplevelserna av vännernas betydelse i sociala aktiviteter. Syftet med studien var att undersöka vilka aktiviteter unga personer med lindrig

The goal for this master thesis is the creation of a graphical ladder-editor in JavaScript and HTML5. The editor is made in such a manner that the user inserts blocks by selecting them from a menu. Then the block is inserted simply by them clicking where the block should be inserted. The editor itself should handle the required lines. The editor also contains a menu with custom made buttons which

The aim of this study is to create an understanding of how caregivers at nursing homes in both the public and the private sector working conditions manifests itself from an organization theory perspective. The aim of this paper is to describe and analyze how the caregivers in elder care experience their working conditions and if the experiences differ depending on whether they work in the public o

The objective of this thesis has been to study how extensive current research has gone within energy harvesting and to investigate a solution for making the OLP425 (a sensor module developed by ConnectBlue AB) independent of a conventional battery as energy source, whilst staying wireless. This has been done by investigating the amounts of energy that is available from our surroundings (e.g. solar

Seriefelet i Forsmarks kärnkraftverk den 30 maj 2013 har uppmärksammat behovet av utredning kring effekterna av fasavbrott på transformatorers primärsida när sekundärsidan är lastad med olika typer av last. I Forsmark spänningssattes de bortfallna faserna bakvägen via kombinationen av transformatorer och lastobjekt i systemet så väl att underspänningsskydden inte kunde detektera felet. Reservkraft

Climate change is more evident than ever as reflected in The European union's environmental directives which say that the carbon emission must be reduced by 20% and 20% of the used energy must come from renewable energy sources until 2020. In Germany political decision has been made that the nuclear power will be replaced by renewable energy in long term. The purpose of the Master Thesis is to

is a requirement: It would be preferred that a wind turbine with a life of 20 years could repay itself for at least 10 years, if that investment wants to feel worthwhile. This is due to investment costs and annual production of the plant. However, the produced electricity, which is defined by suppliers, is not reliable. This is because the estimated annual production is usually given at the averag

The main idea with this thesis is to discuss the situation of the parent and the teacher of a child with attention deficit hyperactivity disorder (ADHD). Previous research on the parents’ and the teachers’ per-spective of the children has helped me to understand the complexity of the disorder. I have analyzed a single case of a child from Poland who came with his parents to Sweden and started educ

This master thesis was carried out at Lund University in collaboration with the European Spallation Source (ESS). It brings up the question of whether it’s possible to find an optimal solution for complex power electronic topologies, using a well formulated global optimization methodology. The commercially available software tool MATLAB was adopted for these studies, including its own toolbox for

When making decisions regarding investments and planning of the distribution network, it is of great help to be able to calculate and analyze the reliability. The main interest is to study how many of the faults occur and the duration of these faults. The software Tekla NIS contains a module for calculation of the reliability of distribution systems, this is also known as reliability based network

The aim of this master thesis is to present new and well proven methods about how to best design an overview display. Since designing is a creative process and there can be many alternative designs that fulfill the same requirements, this master thesis will focus on presenting guidelines and principles that will aid in the design process. How to design an effective interface display will be discus

People spend more and more of their awaken time indoors, resulting in no or little exposure to sunlight during the day. Natural daylight is superior to artificial light concerning our biological and psychological health, and it is one of the most important external signals to the circadian system, the “wake and sleep”-clock. The objective of this thesis was to develop a luminaire which spreads sun