The thesis demonstrates a low-cost, low-bandwidth and low-resolution Analog-to- Digital Converter(ADC) in 0.35 um CMOS Process. A second-order Sigma-Delta modulator is used as the basis of the A/D Converter. A Semi-Uniform quantizer is used with the modulator to take advantage of input distributions that are dominated by smaller-amplitude signals e.g. Audio, Voice and Image-sensor signals. A Single-bit feedback Topology is used with a multi-bit quantizer in the modulator.

This thesis treats the subject of a complete steady state and dynamic model of the VSC-HVDC covering both the AC and DC system-side of the converter. The Topology of the model is recreated after the scheduled transmission line in the south of Sweden, called SydVa?stla?nken. The Topology covers both a simple two terminal connection as well as a multi-terminal one. This model is to be implemented in the power system simulation program ARISTO.

This thesis is performed in collaboration with Kraftpowercon AB in Surte, Sweden. Focus has been on to identify the powerlosses in one of Kraftpowercons halfbridge DC-DC converters. First theoretical calculations are made, the calculations is verified with measurements of six different operation modes. In a later stage, methods like soft switching and synchronous rectifying are proposed to increase the efficiency for the converter. To achieve softswitching for the halfbridge, the LLC resonant converter topologies are implemented and examined.

Syftet med examensarbetet är att se vilken kunskap barn i förskolan har av olika lägesbegrepp och vad som kan utvecklas vidare, både med hjälp av ett pedagogiskt material, Topology Workshop 1, och genom kommunikation med barnen då de matematiska lägesbegreppen används i naturliga sammanhang. De lägesbegrepp som undersökningen har fokuserats på är inuti, på, under, bredvid, framför och bakom.Undersökningen har genomförts som ett undervisningsförsök på en förskola med barn i åldrarna 5-6 år. Barnen har deltagit i flera olika lärandesituationer vilka har observerats utifrån ett i förhand utarbetat observationsschema.Resultatet av undersökningen visar att samtliga barn som ingått i undervisningsförsöken med lägesbegrepp har utvecklat en säkrare kropps- och rumsuppfattning. Undersökningen visar även att pedagoger i förskolan behöver arbeta mer medvetet och systematiskt med lägesbegrepp. Därför ser vi nyttan av kompetensutbildning för pedagoger i förskolan..

TCP (Transmission Control Protocol) is a transport protocol designed for the wired Internet. In wireless networks packet losses occur more frequently due to the unreliability of the physical link. The main problem is that TCP treats all losses as congestion, which leads to a lower throughput. Ad hoc networks are multihop wireless networks of mobile nodes, where each node can allow other packets to pass through it. Topology changes often occur and may lead to packet losses and delays, which TCP misinterprets as congestion.

The company Västra Mälardalens Kommunalförbund, VMKF, wishes to revise and optimize their present data and IP-telephony network as of today consists of the three municipalities Köping, Arboga and Kungsör. As a municipal corporation, they seek consultation regarding internal as well as external review and investigation of the main structure of the network, its functionality and safety. By today?s increasing demands of Internet accessibility, availability of services and security far more extends the requirement of a complete network design. The foundation of networking rests on the balance between each of these necessities.

No infrastructures today are growing faster then communication network. The requirement of being able to communicate in a fast and qualified environment to a low cost increases in line with the development and competition. Itera Networks is no exception when it comes to rapidly developing new and better network solutions for themselves and for their customers. With these requirements in mind their needs for an analysis of the existing communication solution becomes very obvious. This project contains such an analysis in which various studies of the existing network environment have been made.

The purpose of this bachelor?s thesis is to examine video games, gamers and gaming from an information science perspective. The purpose of the study is partly to study video games as a type of information system and partly to study gamers information use, information seeking and also the experience of gaming. A selection of five games have been analysed using a Topology for video game analysis created by Espen Aarseth. A quantitative investigation has also been made, in the form of a web survey distributed through four Swedish online forums, the result of which was analysed using Carol Collier Kuhlthaus model of the information seeking process.

The world is yet to experience world peace, a peace that is hindered by ongoing conflicts that escalate into wars around the globe. Therefore, peace can only be possible if conflicts are restricted and resolved to prohibit war, creating and maintaining peace. This study will be constructed around this assumption, but will include a moral variable and answer: is there a moral conflict-solving road to peace?The study will be directed around appeasement, economic sanctions and war as conflict resolving agents for peace. I will construct a typology with common features by using empirical material; a Topology that will then be analyzed using two opposing ethical theories, consequentialism and common morality.The analysis will be constructed around the above mentioned question.

Powder Metal (PM) gears are machine element components which operate under the same principle as conventional gears, but, due to their intrinsic material characteristic need to be designed slightly different, and its manufacturing process offers advantages previously unobtainable by conventional steel gear manufacturing methods. The use of PM in similar applications, such as synchronous hubs, makes them a suitable candidate for production in such material. The current master thesis work focuses on gear design using PM by utilizing finite element method (FEM) to reduce weight and inertia taking into account root bending strength and tooth deflection.First a topological optimization is used to determine feasible candidates for different web designs which have as objective to reduce volume, similar topologies were shown during different loading conditions; and hence, this Topology was chosen as a suitable candidate. A shape optimization of the topological candidate was performed having as state variables root bending strength, independent for compressive and tensile side of the tooth loading; and tooth deflection, which in concept can be correlated to static transmission error (TE).Another aspect in this thesis analysed is the possibility to incorporate non-trochoid root geometry, a trochoid root is always present when machining with a hob, into the gear root and hence reduce the stress concentration here. Due to the use of PM, a non-symmetric optimized root can be achieved and hence be optimizing compression and tension.Results showed significantly lower inertia, for example certain results showed 40% reduced when compared to solid gear, with adverse effects as increase in tooth deformation and increase in maximum principal stress.

In the 1969 Le Thor seminar, Heidegger stated that his philosophical journey could be characterized by three different themes: meaning, truth, place. The first two of these have been the subject of countless studies and discussions, but the question of place is still relatively unexplored in Heidegger?s thought, despite the increased interest for this topic in his writings. Even though scholars like Jeff Malpas, Edward Casey, Stuart Elden and Miguel de Beistegui have written books and essays on the importance of the conception of place in Heidegger?s thinking, there are still many important aspects of this theme to be discussed, given the importance Heidegger himself ascribed to this topic.In this essay, I therefore wish to pose the question of how one can understand the relation between place and the role of tragedy in Heidegger?s conception of truth.

In order to respond to a more complex community planning with increased cooperation and public participation, a common language and a common model to be used as a base for the communication process is needed. The thesis behind this dissertation for a master's degree is that a virtual 3D planning portal would respond to this need. Why and how are explained and described through studies of communication- and perception theory as well as technology and recent research. The introduction concludes that a broad participation and a transparence towards underlying information are important foundations for the coming work with the model. The first four chapters of the theory part show the benefits of using natural signs in our mixed cultural society, instead of the more arbitrary symbols. Using visual landscapes for storing information is motivated by the flexibility of our visual memory and its ability to understand complex connections.