Most of the portable electronic devices use a battery as a primary power source. Nowadays, when the applications are becoming smaller and smaller and more power efficient, the designer needs to concentrate more on reducing power consumption, using secondary power sources and introducing power storage devices. Multiple power source availability and a power storage device on the board will make the applications much more useful and efficient in everyday use. This thesis proposes a power supply unit (PSU) for wireless sensor platforms which is capable of supplying a sensor node with energy from multiple sources, as well as status information from the PSU. Present power storage devices, like electric double-layer capacitors (EDLCs) and batteries, have become more and more common as their characteristics have developed.

AbstractValue Added Tax, VAT, is a general consumption tax that is added to almost all consumption of goods and services. Despite the extensive work of harmonization of the VAT system relating to electronic services, it can be difficulties in determining the taxable land, something that could affect the internal market in a negative way. The Swedish companyStardollABwas double taxed on certain electronic services that they provided consumers in theUK. The problems that lead to double taxation must be identified to ensure free competition and free movement within the internal market. The principle of neutrality pervades the whole of the EU VAT system which can be derived from principles of the Treaty, establishing the common market, and the introduction of the VAT Directive.

Abstract The global average temperature has increased by 0,74°C over the last 100 years. Most probably, the explanation is due to increasing use of fossil fuels and the agricultural expansion of land use. The new life stile of mankind leads to increasing concentrations of greenhouse gases in the atmosphere. Food consumption contributes with approximately a quarter of the total greenhouse gas emission per person and year, why it is an important task to reduce these. The aim of this work is to quantify energy use and greenhouse gas emissions for (Swedish) herbs produced in Swedish greenhouses. The study is based on a LCA (Life Cycle Assessment) and collected data from participating companies producing herbs in pots.

The EU- citizenship was established in the Maastricht Treaty in 1993. This citizenship involves rights to free movement, election rights to the European Parliament, diplomatic protection and the right to petition to the Ombudsman. In my analysis I discuss the implications of the EU- citizenship for the individual. The development and legal status of the union citizenship is examined in order to give a general understanding of the implications. In addition, I conduct a case study concerning the EU- citizenship's impact on workers rights.

The purpose of this thesis is to evaluate 7 different search strategies for content-based image retrieval with respect to retrieval effectiveness. The strategies are based on different levels of resolution implemented by the Haar transformation. The result of the study shows an improvement in both mean average precision and mean recall in strategies based on lower levels of resolution..

Corporate governance intensified due to the corporate scandals in the USA which led to a new law the so called Sarbanes-Oxley Act (SOX).In 2005 the "Svensk kod för bolagsstyrning" (The Code) was introduced. The main purpose of The Code is to strengthen the confidence in Swedish companies quoted on the Stockholm Stock Exchange. The Code focuses on the working process of boards. The rules set by The Code places higher demands on the board.  Among many other duties the board has to establish long term operational goals and strategy.

The lifecycle of fashion products get shorter and shorter. Companies in the fashion business needto make sure that they can offer their customers the right products, in the right quantity at theexact right time. The competition on the fashion market today is tough and if companies aregoing to be successful they need to have access to the most reliable suppliers, and also offer theircustomers products with high quality to attractive prices. It is therefore of highest importance toevaluate and choose the right sourcing strategy. Product category and type of organisation aresome of the factors that will determine which strategy that is most appropriate.

The aim of the present study was to investigate the effect of strategy for grouping calves into group pens with automatic milk-feeding systems on the calves' health and growth rate. The usefulness of changes in feeding behavior recorded by the computerized milk-feeder during periods of illness to identify calves with clinical diease was also studied. In the first experiment, 64 calves were moved in and out of group pens in a continuous way, while 46 calves were transferred into group pens until the the pen was considered "full". The calves in the latter groups were then held together until weaning. It was found that calves in the fixed groups grew approximately 100 g / day more compared to the calves in the dynamic groups. Signs of clinical respiratory disease were less frequent in this group, while the incidence of diarrhoea was slightly higher. In the second experiment health parameters, milk consumption and feeding behaviour was recorded daily for 46 calves.

Poverty among children has received a great deal of attention in the media the past few years. The group in which poverty among children has increased most is among single parents; therefore we have chosen to examine this group in this study. The purpose of this study is to take part in single parents and their children?s experiences of living within a very tight budget and the strategies they use. We found it interesting to put this information in relationship to the consumer society we live in today.

Abstract Background: In 1997 the Kyoto Protocol was signed, it?s an international agreement which is aimed to reduce greenhouse gas emissions. Sweden's goal is to reduce energy using in buildings with 20 percent by 2020 and 50 percent by 2050. This is a comparison with levels from 1995 (Glad, 2006). For Sweden to be able to reach its goals, they need to construct more low-energy buildings (Åhman, Wahlström & Lundblad, 2010).

The purpose of this study was to investigate the reason behind thedecision by a company regarding the desire to use mobile access to theirERP-system and to discover whether this will involve any loss offunctionally in comparison to using the ERP-system on a computer atthe office. In addition, the pros and cons involved in using mobiledevices for accessing the ERP-system will also be examined. Semistructured telephone interviews were conducted with companies whicheither used or did not use mobile devices in relation to their work. Atelephone interview was also conducted with a consultant who isworking with the implementation of ERP-systems and mobile solutions.The survey showed that companies with staff working in the field assellers, service personnel and construction workers want to gain directaccess to their ERP-system so as to be able to act directly and takedecisions, to have the ability to provide more efficient order processingand to send out invoices more quickly. Those companies which have notopted to use mobile devices at work within this field are those whichare unsure of the connection to the Internet and the capacities availablewithin cellphones.

The purpose of this paper was to carry out and evaluate a pedagogic ICT-project, where the computer was implemented in art class. Focus was on the consequences of collaboration and also on the students? understanding of their own performance, compared to techniques in traditional art class.The study was qualitative and began with studies in literature. The contents of the literature are the foundation of the discussion, especially theories concerning the learning process, IT and computer-based learning. In the project, three different groups of students from upper secondary school attended and they where given tasks to solve in the image editing program Paint Shop Pro.

The aim of this essay is to see how various texts, both Swedish and foreign, have described the former Swedish colony of St. Bartholomew. The focus has been on the slaves on the colony, and here how they were treated and how the analyzed authors portray the slaves lives.The literature has been divided up into two different categories, based on when they were published. The distinction has been made by dividing them up into a contemporary cluster, that were published before the 1900?s, as opposed to the more recent literature, from after the 1900?s.

Problems with the current energy system, which partially relies on non-renewable fuels, are increasingly recognized. Emissions of greenhouse gases from fossil fuels may speed up global warming, which in turn leads to a number of negative consequences. Nuclear energy is risky and relies on consumption of a scarce resource. This leads to a demand of renewable energy that is also economically feasible. One possible renewable source of energy is solar energy.

At the end of 70s and the beginning of 80s, 18 terminals was built and used for chipping wood residue from clear cuttings. Most of the terminals was terminated before the 2000s but with the high oil- and energy prices that we can see today there might be a place for these terminals again. The goal with the study was to analyze and compare economical differences between 5 different logistical systems, collected data was used with a set of formulas. The systems include long range transport of slash, chips and bundles. Three of the systems include transport by lorry to industry the last two includes a terminal with access to train transport.