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The efficacy of screening for breast cancer with mammography has been a subject of controversy during the last decades. However, the general opinion is now that screening reduces mortality in breast cancer (Zackrisson, 2006). It is nevertheless important to weigh the efficacy against the harm and costs associated with screening. Cost-utility and cost-effectiveness analysis of screening have genera
In the year of 2002 a new council regulation on community designs was implemented. In the beginning of the essay the legal situtation before the implementation is investigated and part of the purpose is to evaluate if it constitutes a solution to the problems with protection of fashion designs that existed then. Because fashion designs more or less were excluded from protection during the period b
The number of traffic-related fatalities has dropped significantly in the last few decades, but the trend in fire safety, albeit positive, show a less rapid improvement. One reason could be the introduction of the Euro-NCAP-system in traffic safety which has been instrumental in promoting innovation in the field. In this report, a first version of a similar system for smoke alarms, arguably a most
In this report heat quantity measuring and temperature regulation of smaller heating networks have been studied. At lower flows, as well as at lower difference temperatures, the accuracy of the measurement is very low. Today's control of a heating plant endeavour to let the temperature of the water into the heating network follow the heat requirement. This control strategy leads to small heat
A self-tuning controller for frequency control of power systems by HVDC.
One of the advantages of High Voltage Direct Current, HVDC, is the possibility to control the power flow between different parts of an A.C. network. This property is being used when disturbances in the frequency, caused by load variations, is eliminated. Simulation studies on a physically scaled model of the "Go
En styrd grundvattensänkning är ett vanligt inslag i byggprojekt där markarbeten sker under grundvattennivån. Under byggtiden sänks grundvattennivån genom att grundvatten pumpas upp genom installerade brunnar. En sänkning av grundvattennivån minskar portrycket och ökar effektivspänningen i jorden vilket medför marksättningar. Storleken på marksättningar beror på avsänkningens storlek och jordegensDuring a construction project where excavation is made beneath the water table, it is common to perform a lowering of the water table. The groundwater can be extracted by installed wells in the stratum of water-bearing soil. A lowering of the water table results in a decreased pore pressure and in an increased effective stress in the soil. An increased effective stress results in ground settlement
Artikeln diskuterar relationen mellan det offentliga och det privata utifrån ett rumsligt perspektiv. Artikeln lyfter också potentialen i att använda människors minnen och erfarenheter som ett verktyg i stadsplaneringen.
Den mängd havskräfta som säljs på den svenska marknaden är idag långt mindre än den tillgängliga kvoten. Skulle fiskarna få möjlighet att sälja mer havskräftor ökar intäkterna, men det kan också leda till att priserna blir lägre. I den här studien analyserar vi hur priserna påverkas om mer trålfiskad havskräfta säljs på marknaden. Resultaten visar att:Om mängden trålfiskad havskräfta ökar med 5 pr
