Sök:

Sökresultat:

118 Uppsatser om Railway switches - Sida 5 av 8

Statlig övervakning av Internet: En diskursanalys av riksdagstryck 1994-2007

This paper attempts to survey the debate in the Swedish parliament on state surveillance on the Internet, from 1994 to March, 2007. With a discourse analysis inspired by Foucault, we follow how the idea of state surveillance is viewed by politicians during the period. By focusing on the Internet, we expect to find how politicians in the parliament regard the idea of an unregulated forum for citizen communication and interaction, and how the need for state surveillance on the new arena that is Internet, is expressed and argued for. Theoretical framework is given by Foucault?s theory of the Panoptic state, as well as his thoughts on discourse, power and governmentality.

Välfärdseffekten av en konkurrensutsatt tågmarknad

The aim of this paper is to describe how to measure welfare effect of the deregulation and increased competition of the public transport by railway in Sweden. The paper also includes a numerical example of how to measure the welfare effect. In our study we use public data from SJ regaring quantity and ticket prices for the period 1996 - 2005. We have used equivalent variation, EV, as the method to measure the welfare effect. We demonstrate how to derive the equation to calculate EV by starting with a Marschallian demand function.

Halvautomatisk styrning av järnvägskran

En RMRC, Rail Mounted Railway Crane, är en kran för hantering av containertrafik till och från järnvägsvagnar. Kranen som är helt manuellt styrd utrustas med en semiautomatik som hjälper operatören att positionera kranen. Målpositionen för containern kommer från terminalens logistiksystem. För positioneringen har en lämplig regulator tagits fram som tar hänsyn till den mekaniska påverkan på motorer och växellådor som finns vid acceleration och retardation. Regulatorn har tagits fram och testats i en simuleringsmiljö.

"I feel that I was being written..." : Identitetsskapande i William S Burroughs romaner Junky och Queer

In this essay I examine how identity is created in William S. Burroughs two early novels Junky andQueer. The theoretic starting points are Lacans psychoanlytic concepts ?ideal ego?, ?egoideal? and the ?superego? and also queertheory as presented by Tiina Rosenberg in her book Queerfeministisk agenda.The examination contains an analysis of how Burroughs creates identity in both Junky and Queer with main focus on the second novel. I look at how the desire in the maincharacter Lee is described and what the desire is aimed at.

Statusbedömning och förbättringsförslag för startkedjemaskineri, startkedja och linspel för stränggjutningsmaskin

The main goal with the master thesis has been to do a status evaluation of the chain machinery with its start chain and wire to secure the production on a short basis due to that a reconstruction is not planned at this time. An evaluation of the condition of the start chain and the rollers in the chain depository has been done. An offer has been requested for a new start chain and the evaluation of the start chains may be a basis for the decision taking. The production has been able to go on, although it has arisen some problems which have been difficult to find the causes for. There is no gathered ?picture? of the machinery status and a mapping of each machinery has been compiled of comprehensive logs.

Hjälpkraftsystem med två lågspänningsnivåer

Because of increasing demand of power on Malmbanan the capacity of the existing wires which supply the trains must be increased. This increases the stress on the existing poles and for this reason the system for supplying the loads along the railway is to be removed from the poles and be replaced by some other system. This thesis is a study on a two-level low voltage (1 kV and 0.4 kV) electrical system with the aim to investigate if it can be an alternative to the system used today taking into account the voltages, fault currents and costs.In this thesis the following tasks have been performed:? Gathering of data? Description of basic theory? Loadow and fault current calculations of the system with MATLAB? Life Cycle Cost estimate of the system? Analysis and conclusions from the resultsThe results show that the new system can be an alternative to replace today's system. The simulations and calculations show that the voltage drop is at an acceptable level and that the fault currents are large enough to supply a safe disconnection if a fault occurs at the far end of the system..

Simuleringsverktyg som hjälpmedel vid optimering av signalavstånd inom järnväg : Simulation tool as a help for optimization of signal distances on a railway track

The project Design analysis and proposals of plastic screw caps in Australia was performed at Högskolan Dalarna incooperation with University of Western Sydney, Australia. The Swedish company Tetra Pak, in Lund, were assigner forthe project that was performed 2006-2007. The commission was to do a survey about the packages for non-carbonateddrinks in Australia. The bottles had to be plastic, able to open in one step and with focus on the caps.The project has result in design analysis and a new proposal of a plastic screw cap for the Australian market. Sixbottles were choosen and they were all testet on 20 consumers each with a Likert-scale test.

Melleruds Resecentrum - Förslag till ombyggnad av befintlig järnvägsstation

SAMMANDRAGDenna rapport är en del i ett examensarbete på byggingenjörsutbildningen vid Chalmers Tekniska Högskola. Som komplement till rapporten finns ritningar på idéförslag samt ett program som beskriver byggnadens nutida utformning samt kraven på en ombyggnad.I denna rapport utreder vi möjligheterna att bygga om den befintliga järnvägsstationen i Mellerud till ett modernt resecentrum, på uppdrag av Melleruds kommun. Rapporten behandlar flera olika grundläggande lösningarav utformningen. Med dessa som utgångspunkt utformas sedan de olika delarna i den bästa av de grundläggande lösningarna. Målet med rapporten är att utforma ett resecentrum som tillgodoser resenärernas behov.

Ersättning i praktiken ? I samband med byggandet av Citybanan

Denna studie har utförts i uppdrag av Umeå kommun i syfte att uppfylla det lokala delmålet om en giftfri uppväxt. De vill nu få en uppfattning om hur massagolv kan påverka inomhusmiljön i en förskola, och om dessa golv generellt uppfyller deras policy för materialanvändning. Massagolv är fogfria och porfria golv, de läggs ut som en flytande plastmassa och efter härdning blir de mycket tåliga mot både kemisk och mekanisk belastning. De flesta massagolven baseras på härdplasterna epoxi, akryl och polyuretan. Dessa plaster har olika egenskaper som gör de optimala i olika typer av förhållanden.

Riskhantering i projekt : Modell för uppföljning

In April 2010 Vägverket (the Swedish National Road Agency) andBanverket (the Swedish National Railway Agency) will merge intoTrafikverket (the Swedish National Traffic Agency). Trafikverket willassume unified responsibility for the risk management that atpresent is responsibility of Vägverket and Banverket separately. Atpresent, as it will be shown in this thesis, Vägverket and Banverketshare the same theoretical background for risk management but usedifferent implementations often within the same agency. The use ofdifferent implementations results in a reduced transparency of therisk management both within and outside the agencies: this willbecome even more problematic when they will be fused intoTrafikverket.The aim of this thesis is to review the current risk managementmethodologies used at Vägverket and Banverket and to suggest aunified tool for the risk management at Trafikverket. This will bedone by focusing in particular on construction projects, one fromVägverket (Partihallsförbindelsen) and one from Banverket(Nynäsbanan).

Klimatkalkylering

Detta är en studie om klimatpåverkan i samband med anläggandet av järnvägsbroar i syfte att ta fram nyckeltal (moment, material, mängder) för att effektivt kunna reducera utsläppen av växthusgaser. Till grund för studien har vi arbetat med Trafikverkets verktyg klimatkalkyl 2.0. Det har granskats utifrån användarvänlighet och riktighet i indata och emissionsomräkningsfaktorer. Det för att se till skillnaden mellan modellen och ett unikt anläggningsprojekt, var skiljer sig Trafikverkets typvärden mot de projektspecifika förutsättningarna samt vilka blir dess konsekvenser?Studien har kommit fram till att utan viss försiktighet vid arbete i klimatkalkyl 2.0 finns risk för inkorrekta resultat.

Utmattning av järnvägsbroar i armerad betong : Enligt eurokoder

Commissioned for this report is Ramboll, Bridge and Tunnel Unit in Stockholm. Theidea throughout the work has been to primarily help bridge designers compilingadvice and instructions on how fatigue verification for railway bridges in reinforcedconcrete shall be performed under the new rules, the Eurocodes.After the introduction of the Eurocodes in 2011 has major problems emerged amongdesigners around Sweden. In some areas, it differs in the calculation rules comparedwith rules from the Swedish Transport Administration and the National Board ofHousing, Building and Planning calculation. Fatigue verification is one area where thenew calculation rules are different from the past.A large part of the report has been to interpret and find the relevant information inthe Eurocodes concerning fatigue. When questions or doubts have surfaced, this hasbeen discussed with Elisabeth Helsing at the Swedish Transport Administration andbridge designers at Ramboll.The result is a report where the structure is organized in the way that the bridgedesigners can move from cover to cover and realize that fatigue verification in realityfollows the same order as the report's sections.

Analys av stationsplattformsutformning ur ett säkerhetsperspektiv

Train travel has increased in Sweden, and future increase of train transports putdemands on the already vastly exploited railroad net. The increased need of capacitycan be seen in the ongoing and planned expansions of the railway track. One part ofthe railroad infrastructure which is affected by an increase of travellers is the design ofthe station platform. Since the platform is the place where the traveller meets thetrain, dangerous situations can occur in this environment. A number of studies focuson single safety risks, albeit there is no research to show the full picture of safety inthe platform environment.This study aims to treat and put together a compilation of risks for the traveller in theplatform environment in the form of a checklist, which can be used as support inplanning and design of a safer platform environment for existing or planned platforms.The thesis has, through case studies of five ongoing projects within the NationalRailroad Administration (Banverket), interviews with train company personnel andinternational railroad administrators, identified and treated safety (and security) risksin the platform environment.The conclusion of the study is that the relations between the traveller, the physicalplatform environment and the project organisation are important to explore andexploit when designing effective safety measures.

Spårtrafik i norra Stockholmsregionen

Northeast Stockholm is a region developing fast. There is already a great need for new transport solutions for the people commuting to the city, since long queues slow down car traffic and the local railway, Roslagsbanan, needs to be upgraded to attract more travelers. The competitive advantage of rail?traffic over the car when it comes to greenhouse gases and air pollutants is another reason to develop Roslagsbanan.This report investigates the differences between car and train to create a basis for a proposed expansion of Roslagsbanan. Once the proposal is presented, costs, emissions reductions and public benefits are analyzed.

Regeringens transportinfrastruktursatsningar : En studie av tågtrafikens utrymme i regeringsanslagen för transportsektorn

In the government's bill on infrastructure for 2010-2021, the government presents that road investments should be prioritized before investments in the railway. The grants for operation and maintenance of the railways are much higher then in the last government's bill. Furthermore the current founding of investment in railways is higher then for road investment which is in opposite of the bill on infrastructure's directives. Therefore the purpose with my thesis is to find which factors that can explain how come the government has chosen to take these actions. As a model to help me achieve my purpose I have been using a modified version of the DBO-theory, where the basic factors to explain an action is Desire, Belief and Opportunities.

<- Föregående sida 5 Nästa sida ->