Mass distribution with techniques as multicast and peer-to-peer are becoming increasingly important in the Internet. Today the distribution of sound and video over Internet, so called streaming media, is static due to the unicast method. This results in a linear increase of distribution costs and therefore no conditions for commercial scalability. This thesis describes why multicast may be the only scalable alternative for commercial mass distribution of streaming media over Internet. Mass distribution through peer-to-peer technology promises a lot but is fronting a couple of great challenges, for example asymmetric bandwidth, locality and legalization.

Context. In today?s society we use smart cards in many areas, NFC is a smart card technology that allows contactless interaction between a reader and the tag, the tag is often in the form of a card. NFC can be used for various Payment methods or as access card to a building which makes life easier. In previous studies, the technique has proven to be weak to attacks using an NFC reader connected to a computer.

In this master's thesis the problem of determining the uncertainty for an estimator of an unknown parameter is considered. The case we study is the estimation of gravity using a reversible pendulum. This involves the estimation of the point where two regression lines intersect. The estimated gravity is a function the coordinates of this point. One way to determine the uncertainty of this estimator is to use bootstrap methods.

I ett kortbetalningssystem såsom Visa International Service Association (Visa) finns det fem stycken tongivande parter: kortinlösaren; kortutgivaren; kortinnehavaren; säljföretaget och Payment Service Provider (PSP). Ett säljföretag som låter sina kunder betala för varor och tjänster på sin webbplats skickar kundernas kortnummer krypterat till en PSP som vidarebefodrar dessa till VisaNet som är dataknutpunkten i Visa. VisaNet söker med hjälp utav kortnumret upp den bank som har utgivit kortet och efterfrågar samma bank om en transaktion får ske från kortet. VisaNet får ett svar som vidarebefordras vidare tillbaka till säljföretaget som sedermera även får sina pengar överförda till sitt konto från kundens konto.Uppdragsgivaren till detta examensarbete skall utveckla ett helt eget system och bli sin egen PSP utifall uppdragsgivaren beräknar att mer än 1,3 miljoner stycken kortbetalningar kommer att ske genom uppdragsgivarens kortbetalningssystem per år. När detta examensarbete utfördes uppskattades antalet kortbetalningar per år inte till denna siffra och rapportförfattaren utvecklade därför ett korbetalningssystem med hjälp utav en befintlig PSP.Kortbetalningssystemets kärna är ett API som andra systemutvecklare hos uppdragsgivaren kan anropa.

In recent years, agile software development methods have become increasingly popular throughout the world. Today there are a number of different agile methods and they all rest on the Agile Manifesto that was formulated in 2001 as a reaction to the traditional software processes.The aim of this thesis is to make a survey of some of the agile methods used today and to see how they are being used in practice. It consists of two parts: a literature study and an interview study with people working in the software business. First, a definition of agile methods is proposed and a number of different agile methods are described. Second, the interviews are being analysed with special focus on communication, collaboration, expectations and results.

1st of may 2003, a new energy system based on electricity certificates, was initiated in Sweden. The purpose with this system, is to stimulate an enlargement of energy production from renewable sources. The electricity system, ist built on that the producers of energy from renewable sources confer a electricity certificate from the government for every produced MW energy from renewable sources. The electricity certificate is supposed to be turned over and with that generate reciepts to the producers. Furthermore there is an obligation for the energyusers und energysuppliers, that means that the users and the suppliers every year the 1st of april got to have electricity certificates in proportion to their energy consumption during previous year.

Syfte: Identifiera de olika betalningsmedlen för att finna samband mellan upplevelserna av deras säkerhet, enkelhet och hur dessa aspekter påverkar valet av betalningsmedel.Metod: Kvantitativ metodTeori: Litteratur, vetenskapliga artiklar och empiriska rapporterEmpiri: En enkätundersökning gjordes för datainsamlingSlutsats: Undersökningen bekräftar att både upplevelsen av säkerhet och enkelhet påverkar konsumenterna i valet av betalningsmedel. Vår undersökning visar att enkelhet ör den vanli-gaste och viktigaste orsaken för en konsument i valet av betalningsmedel. Undersökningen visar även att i olika ålderskategorier skiljer sig användandet av de olika betalningsmedlen åt och den visar även på olika värderingsgrunder vad gäller säkerhet och enkelhet mellan ålders-kategorierna för valet av betalningsmedel..

AbstractWe live in a world today that is characterized by the Internet. We can get hold of people on the other side of the globe whenever we want and we can purchase what ever we want, from who ever we want, anytime we want. This development has made it important to find systems of dealing with the payment in a safe and secure way, both for a private person as well as for a company, when you do transactions with people far away, and those systems is the core of this essay. As a private person you sometimes need to transfer money to family members who live abroad and you can then use clean payments. This means that banks all over the world has systems which makes it easier when their customs wishes to transfer money abroad.

Product development cycles become shorter and shorter. The time from idea to market has become an important competitive factor. Despite this, methods used for making the product development process faster are surrounded with uncertainty about their efficiency. The purpose of the thesis is to describe the pros and cons of ?best practice? methods for shortening lead times and how these methods effect the lead times in research and development.

Approximately 60 million cubic meters of round wood are transported every year with trucks in Sweden and stand for 15 % of all truck transportation in the country. The big amount that is transported results in many haulage companies works in different parts of the country with different conditions to get a good flow on their transports. Today the transport pricing is very general and the payment consists of the unit round wood they are transporting and the distance of the transport. The purpose of this study were, from the freighter and the haulage company?s perspective, try to find ways to change the today applied transport pricing to more differentiated and compare them to historic payment of transportation.

Context. In today?s society we use smart cards in many areas, NFC is a smart card technology that allows contactless interaction between a reader and the tag, the tag is often in the form of a card. NFC can be used for various Payment methods or as access card to a building which makes life easier. In previous studies, the technique has proven to be weak to attacks using an NFC reader connected to a computer.

Then the language learning process and the approach in a preparatory class differs itself from a general class. The methods conducted in a preparatory class are not just focused on teaching as in a more traditional method. Achieving the objectives in a preparatory class depends on the individual student and the cohesion in the group. Students have different backgrounds and knowledge level, therefore it is extremely important that the teachers use different work methods in order to achieve and to promote the students' language development. The aim with this survey is to get the knowledge about what education methods is being used by teachers in a preparatory class.

Hunger is a problem in some parts of the world (www, FAO 1, 2012). The lack of food is often a result of insufficient knowledge in soil fertility management (Röing de Nowina, 2012). Ongoing hunger and malnourishment are quite prevalent in Sub-Saharan Africa and are often combined with poverty (www, FAO 1, 2012). Farming is the most common occupation in this area and the farms are often small-scale farms with subsistence crops and a few cattle. The farmers who operate these small-scale farms are economically a weak group.

Today, many veterinary hospitals offer rehabilitation as a service. We think that this is an interesting subject and therefore we want to find out what rehabilitation methods that are available in Sweden for dogs and horses. We want to give animal nurses and other persons who have animals as an occupation an survey that shortly describes how the methods are performed, what physical effect they have in the body and to give examples in what conditions they are used. To find out what rehabilitation methods that are available we sent out two different questionnaires, one to hospitals/clinics for small animals and one to hospitals/clinics for horses and other companies that works with rehabilitation of horses. The information about the methods described in our project we have found in literature and on the Internet.

Improved profitability, a reasonable yearly income or the possibility to have employees are all incentives for expansion. A prerequisite for farm businesses to expand is for land to be made available, either to buy or to rent. In Sweden, 43 % of the total arable land is leasehold land, which implies that a functioning leasehold market is of great importance for the Swedish agriculture. Several factors can affect the supply of leasehold land, for instance the leasehold legislation and the Single Payment Scheme. The fact that the leasehold legislation is compulsory, in protection of the leaseholder, might keep land owners from leasing their land out.