Mål: Målet med arbetet var att undersöka varför vissa patienter har bättre compliance vid ortodontisk behandling än andra och vad som kan förbättra compliance. Detta för att möjliggöra utarbetningen av en framtida metod som skulle kunna upptäcka non-compliers innan behandlingsstart och därigenom kunna ge dem en mer effektiv behandling. Enskilda prediktorer för compliance och deras relativa påverkan på compliance undersöktes också. Metod: Artiklar samlades in via en sökning i databaserna PubMed och Cochrane med hjälp av MeSH-termer. Dessa lästes sedan igenom och för undersökningen relevanta artiklar togs fram med hjälp av exklusions- och inklusionskriterier. Resultat: Övervakning av patienters användning av sin apparatur med hjälp av timermodul ökar compliance över tiden. Lägre ålder på patienten samt dennes relation till sina föräldrar och deras engagemang i behandlingen påverkade compliance positivt, liksom kortare behandlingstid. Slutsats: Det går med nuvarande forskningsunderlag inte att förutsäga compliance på ett pålitligt sätt.

Linux is a growing operating system in embedded systems. Today, Linux is not only in heavy servers but also in cell phones, PDAs, cameras and other devices running on battery power. While current technology is more energy efficient, more and more technologies are implemented into a single unit resulting in an overall increase of power consumption.Low power consumption is an increasingly important feature of a system today. Lower power consumption means lower costs, less environmental impact, and longer life for applications that runs on batteries.This work compiles methods to reduce power consumption of Linux systems. The work includes examining whether the available opportunities are platform-specific or of a more general nature.

Mechanical relays are more and more being replaced with semiconductortechnology. In this thesis it is investigated if and how the larger loads couldbe controlled by transistors. The main part of this work aims to create andverify a solution that can control the starter motor, as well as protect it incase of any failure. The different malfunctions that the solution protectsagainst is high current, too high peak current, low current, maximum cranktime and minimum cool off time. The Timers also protect indirectly againstoverheating of the starter engine.The transistors used are BTS555, from Infineon.

During the last few years the presence of high arsenic (As) concentrations in ground water has been of major concern both internationally and in Sweden. Much evidence has been reported about toxic effects caused by arsenic. The carcinogenic effects and the possibility to measure the toxic impacts at low concentrations made the World Health Organisation (WHO) to reduce the guideline value from 50 to 10 ?g l-1 in 1993. In Sweden the corresponding reduction was implemented in 2003. Several surveys in Sweden have shown that high arsenic concentrations may occur in ground water.