IIR-filter är överlägsna traditionellt skapade FIR-filter på många punkter. De klarar sig med en klart lägre ordning för att realisera ett filter med samma egenskaper. En nackdel är däremot att filtret är klart känsligare för koefficient kvantisering och förlorar sina egenskaper när koefficienterna ändras, detta inträffar även om förändringen är liten. Genom den speciella struktur som vågdigitala filter använder sig av kommer man runt detta problem. Det betyder bl.a.

Bitcoin is a digital currency that is used by people all around the world. The goal of this paper is to give an idea about how much trust there is in bitcoin among its users. This paper has used an online survey aimed at bitcoinusers and a content analysis to collect data about this trust.The conclusions show that there seems to be some trust in bitcoin as a technology and this is based on that the users have a good understanding about how bitcoin works. They also share their knowledge about bitcoin to people around them. The trust between people in the bitcoin network on the contrary doesn?t seem as high because certain technological properties hurt this trust.

This project practise methods used in the interaction design discipline to develop a concept related to the Swedish Guinness World Records Magazine. This project is a challenge to accommodate both the users? and client?s needs. We focus on interaction and the experience, which is acquired through the use itself, and how to connect it to a theme from a client. The aim of this project is to create a meeting place for children where they can interact with technology.

Denna uppsats undersöker problematiken runt att integrera datakällor då analytics används för flerkanalig digital marknadsföring i större organisationer. Ansatsen är kritiskt och går emot bilden av analytics som både enkelt att implementera och använda för flerkanalig digital marknadsföring inom större organisationer. Uppsatsen visar på hur strukturer i större organisationer gör övergripande analytics för fler digitala kanaler problematiskt.Uppsatsen bygger på resultat från en observationsstudie som gjordes inom en större multinationell organisation och fokuserar på problematik som återfanns i två huvudsakliga projekt som genomfördes under tiden för studien..

In this project we have explored digital tools for service management on the bicycle paths of Malmö. This was done through the participation of citizens in order to attempt to discern how such interactions can be eased using a mobile app, as well as how this app can be designed in order to appear trustworthy with user friendly interactions. We have explored this field by using goal-oriented design through interviews, prototyping and user tests. We have created a digital prototype as a possible solution for how the interactions can be done. Throughout the process interviews were held and user tests with selected members of the user group. To explore the concepts we have used paper prototypes in order to establish the design and then defining the interactions with the help of a digital prototype. Finally we have concluded that a general app for bikers in the city would be functional and that a longer study in the effects of such an app would be interesting as a continuation of this work..

This paper describes the work done trying to diminish the noise present in the signal from an IR-detector. The project was aiming towards two different kinds of applications; heat protection and presence detection. The hypothesis was that the signal-noise ratio would decrease if a filter and a proper installation were used for the detector. Some experiments were executed to determine what kind of filter were the most suitable for each application and how these could be installed. After executing the experiments and evaluate the results we recommend to use a specific filter for each application.

In today?s society more and more activities are digitalized. This means that everyone has to be able to use information and communication tools (ICT) in order to take part in the digital world, otherwise they will be left out of the digital community. There is a so called digital gap between for instance elderly and young people, where elderly do not know how to use the tools and there for cannot gain access to the digital society. What happens when people, not only grow old, but also have a communication disorder, such as aphasia? How are they included? The purpose of this study is to investigate whether or not surf pads are good tools for bridging the digital gap for people with aphasia, and which activities and situations that encourages people with aphasia to work with the surf pad.

A method for equine intra oral radiology has been tested. In the study, both a digital system with an intraoral sensor connected to a laptop and a system utilizing image plates and digital developing was tested, initially on cadaver sculls and finally on sedated horses. The digital sensor was not considered viable for this purpose, while the system with image plates and digital developing worked very well. Two different techniques, i.e. parallel and bisectris, are suggested for the best visualization of different parts of the teeth. Intra carious injections of Mixobar oesophaghus contrast fluid was found useful when evaluating the extent of carious lesions. Compared to extra oral radiology, the new method had several advantages and can be used both in clinic and field practices..

Consumers today leave a fragment of information when they pay with their debit and credit cards. The aim of our work is to investigate ways to design a concept of a system in which digitally stored information that today is fragmented among several different holders, can be assembled into a system and made available to consumers. In our study of how a system for financial flow of information should be designed, we intend to study the present situation and the attempts made to alter it into a more informative reality. We intend to investigate the flow of information when a consumer pays by card, and the possible solutions regarding the design and transportation of digital receipts. A majority of the information of our digital consumption is today handled digitally.

The problem of separating a non-rectangular foreground image from a background image is a classical problem in image processing and analysis, known as matting or keying. A common example is a film frame where an actor is extracted from the background to later be placed on a different background. Compositing of these objects against a new background is one of the most common operations in the creation of visual effects. When the original background is of non-constant color the matting becomes an under determined problem, for which a unique solution cannot be found. This thesis describes a framework for computing mattes from images with backgrounds of non-constant color, using Bayesian statistics.

Songs from the Crypt: Mapping the Forces that Hinder the Digital Revolution of Music Distribution This paper seeks an explanation to the low market share growth of the commercial digital music distribution in Sweden. The analysis identifies a spectrum of obstacles that hinder the digital distribution technology from becoming the main form of music distribution in Sweden. These obstacles make the digital music distribution less favourable in comparison with physical distribution from the consumer?s point of view. The authors suggest that in order for the digital distribution of music to become competitive the digital product would either have to be developed further to offer more customer value or the so called a là carte retail model would have to be replaced by a subscription-based distribution model.

I det här arbetet undersöker vi hur retrotrenden påverkat digitala spel. Vi undersöker hur retro blivit en erkänd stil och varför den har blivit det. Vi undersöker dess koppling med nostalgi, hur nostalgi fungerar och varför man kan tänkas vilja använda sig av det när man ska utveckla ett digitalt spel. Retro är inte ett fenomen som är medie exklusivt till digitala spel, vi undersöker hur retro verkar i andra medier och hur medierna blandar retroelement med varandra. Det är inte ovanligt att samtida digitala spel influeras av retrospel eller rent av utvecklas i syfte att bli ett nyproducerat retrospel, detta är något som vi gestaltar i vår produktion av ett digitalt spel.

Stereotypic pacing is frequently observed in captive carnivores, however the underlying causes of this behaviour remain somewhat unclear. One of these possible causes are unpredictable feeding signals, which may give rise to frustration and subsequent pacing. Animal keepers at Nordens Ark had noticed that their Amur leopards had shown stereotypic pacing in connection to the passing of ATVs (All Terrain Vehicles) used by animal keepers primarly when feeding the animals in the park. The aim of this study was to investigate whether the stereotypic pacing of the two Amur leopards at Nordens Ark were affected by the introduction of a signal associated with feeding. The leopards were trained by classical conditioning to associate the sound of a siren with the delivery of food by an animal keeper.

This surveys hypothesis is based on the notion that all citizens have the right to access information of the municipality they live in. The aim of the study is to examine how residents of Vilhelmina municipality take note of the current information, and also how they would proceed to access information in the future. In order to conceptualise the results these following theories were used: digital divide, digital immigrants, digital native, uses and gratification theory, social capital, communications strategies and two-way communication. The survey is conducted with four focus group interviews and one separate interview with a person working at the municipal office. The focus groups were divided into age categories in order to see the similarities and differences between the groups' media habits and preferences of future communications.

In today?s horse keeping, there is an increasing awareness of the importance of movement and activity for the horses comfort and tenability, while tradition has it that horses should be kept in boxes and small paddocks. In order to develop housing systems that fulfils and optimizes the horses needs regarding movement and activity, we need to know more about factors that influence the activity patterns of horses. A first step is to be able to record and analyze the gaits in horses with an automated system. This could be done by use of accelerometer data.In this pilot study, existing accelerometer technique was used to characterize the different gaits in horses (walk, trot and canter) by studying how their respective signal patterns differ and how this is influenced by the size of the horse.The accelerometers being used in this study measures the movement in three different spaces; horizontal, lateral and vertical.