The aim of this report is to give a description of a diploma work of 20 points that has been performed during the spring 2006 at Ericsson AB in Borås. The report accounts for the problem and procedure during the diploma work. The software used for this project was embedded in a radio link. The RAM in this radio link was divided into several regions where two were used for memory allocation. The current allocation of memory in the radio link was not optimized with regards to performance, security and memory use and the configuration used made it difficult to determine the memory use of the system and the actual memory need.

Svenska Kraftnät is (together with the other transmission system operators of the Nordic power system) responsible for keeping balance between the generated and demanded power in the Nordic power system. Spontaneous load variations and system disturbances, however, lead to power imbalance followed by frequency variations. The frequency deviations can be limited to an acceptable level by the spinning reserve, mainly by hydro power control. But there are also other system properties which have a great influence on the frequency and system stability. The frequency and voltage dependence of the loads have a direct influence on the power balance.

Individual identification of pigs could be used in commercial herds for production monitoring, disease monitoring and breeding evaluation. This study investigates the possibility of using microchips designed for dogs and cats to identify individual pigs from birth, through rearing to carcass at the slaughter plant. Two different sizes of microchips, and two different ages of the pigs at injection were tested. Castrates and gilts from ten litters were evenly distributed between chip sizes and injection ages. All pigs were identity marked with both electronic ear tags and injected with microchips.

Automatisk produktidentifiering, s.k. Auto-ID, har funnits länge inom många skiljda tillämpningsområden. Det mest välkända systemet idag är streckkodssystemet, vilket blanda annat används i den studerade försörjningskedjan hos Holmen Paper AB. Anledningen till detta examensarbete har varit att undersöka förutsättningarna och möjligheterna till identifiering och spårbarhet med hjälp av RFID, en teknologi som utnyttjar radiofrekvenser för att läsa av produkternas identitet. På det sättet är förhoppningarna att produktions- och leveransprocesser ska kunna effektiviseras, samt att höja informationstillförlitligheten i systemen.I den första teoridelen presenteras generellt betydelsen av RFID för olika typer av applikationsområden och försörjningskedjor.

For several years Uppsala University together with several companies has been involved in a WISENET project aimed at improving railway transport security. By placing a sensor system near the wheels of each wagon, the temperature of the bearings can be measured and transmitted to a collector placed centrally on the wagon. This in turn transmits the collected data to RFID receivers placed intermittently along the railway.As the signals are transmitted wirelessly, problems may occur as the antennas get dirty or coated with ice and snow. To determine the effects of these coatings, several tests were performed examining the reflection coefficient S11, the impedance Z11 and the efficiency eta of an antenna, and how they varied when various coatings were placed over the antenna. Examined coatings were ice, snow and water to determine the effects of weather, and various metal-based coatings: powdered iron both pure and partially oxidized, and iron ore granules.

This Master?s Thesis deals with a special problem that may be of importance when planning a frequency hopping mobile communication network. In normal cases the Frequency Assignment Problem is solved, in order to plan the use of frequencies in a network. The special case discussed in this thesis occurs when the network operator requires that the frequencies must be arranged into groups. In this case the Frequency Assignment Problem must be solved with respect to the groups, i.e.

The background for this degree thesis is a need to replace the existing seal used to protect equipment containing secret or sensitive equipment used by Swedish Defence. The target design should satisfy both the need for tamper evidence and reduce Life Cycle Cost. In developing a new design for a seal, additional benefits such as improved logistics support and indication of attack methods such as heat and solvents have been considered.The lack of guiding principles for end users of seals became evident during the interviews. Major concerns for the future are education of users, information about actions if a seal is broken and user liability.The design work was divided into several phases. A feasibility study was performed including investigation of theory of labels, materials and possible technologies.

To be able to evaluate different radio waveforms in a laboratory environment FOI in Linköping has developed an experimental system for radio communication called Rasmus. The system consists of a transmitter, a channel emulator and a receiver. The transmitter modulates a digital signal to a desired analogue waveform. The channel emulator is used to simulate a real radio channel. The channel emulator distorts the signal by splitting it up in several propagation paths.

Zero knowledge protocols is a lesser known type of protocol that can be used for identification. These protocols are especially designed not to reveal any information during an identification process that can be misused later on, neither by the one who should be convinced of the identity of the user, nor by anyone else that is eavesdropping. Many of these protocols are also especially designed for implementation in smart cards. The more common type of card with a magnetic stripe has during the last few years become more susceptible to attacks since they are easily copied. Smart cards combined with a secure identification protocol has been predicted to be the solution to this problem.

The Swedish population is today exposed to more ads than ever. The number of advertising channels is growing, as well as the number of companies and their advertising expenses. As the products are becoming more alike, the harder it gets for the companies to convince the consumers their product is better than their competitors?. In order to succeed they need to understand what they communicate to the consumers through their different marketing activities, and how that affects the consumers? view of the brand and the product.

Vi har i detta examensarbete samarbetat med den nordiska koncernen COOP Norden, enheten för Hälsa och Miljö.I rapporten utreder vi Coop's möjligheter att med hjälp av modern information's- och kommunikationsteknik förverkliga sina målsättningar angående transparen's och hållbarhet. Att göra det osynliga synligt är ärendet i aktuella undersökningar som diskutera's i rapporten. När konsumenter köper varor i affären vet de sällan hur dessa genom sin livscykel påverkat(eller kommer påverka) människor, djur och miljö. Är det möjligt att ge lättillgänglig varuinformation av denna typ till konsumenterna, i möjlig förlängning av den hjälp som befintliga ekologi-, etik- och miljömärken ger?.

A pilot study conducted on four patients, which we received from the Sahlgrenska University Hospital, who were all potential candidates for a cochlear implant. We fitted our test subjects with a pair of frequency compressing hearing aids called Phonak Naida V SP during the study and let them evaluate them for about seven weeks. Measurements made with monosyllabic words throughout the study showed significant differences in speech perception (p?0.05) compared to their regular hearing aids in 3 out of 4 cases. De-activation of the frequency transposed function showed significant decreases in 3 out of 4 cases compared to when it was activated.All test subjects were satisfied with the new hearing aids and chose to keep using them at the end of the study..

Denna fallstudie syftar till att undersöka hur Sveriges Radio i egenskap av public serviceföretag kommunicerar externt. Vi finner det intressant att undersöka hur en offentlig medieorganisation, utanför den kommersiella marknaden, arbetar med sin externa kommunikation. Genom en kombination av kvalitativa metoder och teori rörande strategisk kommunikation, varumärke, publika relationer samt sociala medier, berörs studiens fyra frågeställningar: Vad har Sveriges Radio för kommunikationsmål? Vilka strategier går att urskilja i Sveriges Radios kommunikativa arbete? Hur använder Sveriges Radio sociala medier i sin kommunikation? På vilket sätt påverkar public service-ideologin Sveriges Radios externa kommunikation? Mer specifikt undersöks hur Sveriges Radio bygger och upprätthåller relationer till publiken samt kommunicerar sitt varumärke, bland annat genom sociala medier.Studien bygger på kvalitativa intervjuer med representanter från Sveriges Radio, samt en retorisk analys av material från SR:s officiella sociala medier. Resultatet visar att Sveriges Radio har implicita kommunikationsmål som är en del av verksamhetsmålen.

This paper discusses how four people in the Swedish Radio station P3, together interact to account therapy trends towards a third party. The focus is on whether, and if so, how they collaborate to make the conversation intelligible for radio listeners. This is done by means of conversation analysis and methods developed by the CA. The result is interesting when the conversation participants do not follow their expected roles as broadcasters and experts while they disagree about the communicative projects to be carried out..

Examensarbetet utfördes på uppdrag av ABB i Ludvika. ABB vill öka effektiviseringen förhanteringen av inkommande gods. Detta för att det mesta sker manuellt i dagens läge och det tarmycket tid och kan resultera i felkällor.Arbetet har två syften. Det första syftet är att förändra del av verksamheten, genom att kommamed ett förändringsförslag när det gäller godshanteringen. Det andra syftet är att jämförastreckkoder och RFID för att se vilket alternativ som passar bäst.För att få fram ett förändringsförslag har vi jobbat med FA/SIM-metoden.Vi har tagit fram ett antal förändringsförslag nedan följer ett urval av dessa:? Ställa krav på leverantörerna att de skall använda streckkoder med rätt standard Code128.? Utforma tydliga och enkla kravspecifikationer för att enklare kunna ta till sig.? Förbättra nuvarande kundrelationer.