This bachelor thesis is about an ultrasonic sensor, implemented in a bubble chamber in Artis. The sensor consists of the piezoelectric sensor and an electronic control circuit. The control circuit consists of a programmable microprocessor, PIC18F2420 and a circuit, which sends the excitation signal to the piezoelectric sensor, and later receives the echo. This bachelor thesis consists also of a theoretical study, which examines different techniques of liquid level sensing in a chamber. The study discusses which factors are important in liquid level sensing and examine accepted methods.

The aim of this study was to gain a better understanding of resource schools 1 as a human services organization and institution, based on teachers and principals? perspectives. The purpose of resource schools is to provide the students tools and resources to enable them to return to the regular school within two years. The study also aims to examine more closely how this objective applies to the studied resource schools in the studied municipality, as well as highlighting the success factors and barriers that exist to achieve the goal. Previous studies show that this kind of differential practice tends to become a permanent solution.

Executive summary This master thesis was originally based on a specific assignment given to the authors from ABB Full Service, a unit specializing in providing maintenance outsourcing: ?How can ABB Full Service expand its offering of providing fundamental maintenance by seamlessly incorporating the business concept with competencies and solutions from other ABB divisions?? The academic issue was developed throughout the thesis, resulting in the following formulation: ?From an organizational perspective; how can service providers bring continuous added value to intra-organizational outsourcing partnerships?? Many of the key findings of this thesis are reflected in the issue. The term intra-organizational outsourcing is a proposed addition to the terminology in the academic discourse on outsourcing. The definition of the term is: ? Where an organization outsources a business process interlinked with the physical operations, requiring the service provider to take over a preexisting unit and its employees.This is an accurate description of the form of outsourcing that ABB Full Service is engaged in.

Choosing the right user experience evaluation method can be difficult, choosing the right one for mobile user experience can be even more so. One major cause is that mobile usage is context dependent. Another contributing factor is that there is not one widely adopted theory or framework for user experience due to its complexity.The purpose of this study was to evaluate an existing method artifact in its feasibility for evaluating mobile applications. The chosen method, AttrakDiff2 is a self-reporting semantic differential questionnaire to evaluate the user experience of an interactive product, based on its hedonic and pragmatic qualities.A study was conducted where the participants assessed one mobile and one web application, which were later rated with AttrakDiff2. The completion of the questionnaire was conducted as a think-aloud session subsequently followed by an interview.The results suggest that the participants experience was affected more by the evaluated application style than the different platforms.

This study investigated the possibility of implementing three standards, Transistion Minimized Differential Signaling (TMDS) and two versions of Stub Series Terminated Logic (SSTL), for inter-chip communication in a specific manufacturing process. The two SSTL standards were implemented in one transceiver system while TMDS was implemented in a separate system. The evaluation was done with Spice simulations on schematic level with some parasitic capacitance and resistance. The idea was to investigate the possibility of implementing these standards and get an idea of eventual shortcomings. In order to create models as a basis for evaluation, simulation environments with models for circuit board and packages were created and transmitters and receivers were designed.

The idea to develop  a platform for a PID-controller came from the need to control the temperature in  an espresso machine in a more exact way than a thermostat could perform. In discussions with Syntronic AB the idea developed into PID-control for industrial use. Syntronic AB suggested that the platform should be based on a commercially available processor module to shorten the development time. The suggestion included the use of the microcomputer Raspberry Pi, which supports USB, HDMI, memory card and Ethernet.The work began with establishing a schedule for the 10 weeks of the projects duration, and after that a system specification listing all functions, implementation and limitations was made. When the foundation of the system specification was done, a preliminary system design took shape.Because of the Raspberry Pi´s lack of Analog-to-Digital converter, a circuit board containing Wheatstone bridges, differential amplifiers and a two channel Analog-to-Digital converter was fabricated.

This study had two different aims. The main aim was to investigate the dynamics and impact of African swine fever (ASF) on a farm in Uganda during a recent outbreak through a case study. The second aim was to estimate the presence of two important differential diagnoses of ASF: Classical swine fever (CSF) and Porcine Reproduction and Respiratory syndrome (PRRS).The field and laboratory based case study of the farm level dynamics of ASF virus during a recent outbreak (October-December 2010) on a farm in the district of Mityana, Uganda, was conducted, using interviews, ELISA and RT-PCR. The financial impact on the farm was also estimated. The impact of the outbreak was profound.

In this examination project I look into what ways upper secondary school students conceive themselves as politically influenced before they voted for the general election of 2010. The purpose is to examine which influences the upper secondary school surroundings and the classes of civic education are contributing with to students before they voted. As a method, I have used personal, semi-structural interviews on eight upper secondary school students who all voted for a party represented in the parliament. I have asked questions about how they believe their parents, the surroundings of their school and the classes of civic education have influenced them. To separate which influences primarily the upper secondary school and the classes of civic educations have had on the students, I have selected two comparison groups of four students in each.

This article seeks to re-imagine the Alandish hembygdsrätt to a regional citizenship. Hembygdsrätt is a judicial tool that regulates acquisition of property and voting rights. Its a central part of the autonomy as it constitutes a social-border between Finns and Alanders.However as Åland and Finland became members of the European Union questions arouse concerning the legitimacy of the current statues. The community argued that it could be considered as a breach of the anti-discrimination principle. Therefore Alandish autonomy was recognized as an exception in the joint-accession treaty of Finland and Åland.

I denna studie används en kvalitativ metod i form av intervjuer med fem unga män som har ett kriminellt förflutet. Syftet med studien är att ta reda på vilka faktorer som kan ha påverkat dessa unga män in i en kriminell livsstil. Studien syftar även till att söka svar på varför dessa unga män väljer att stanna kvar i det kriminella livet. Genom att analysera det empiriska materialet vi fått in genom intervjuer med dessa unga män tillsammans med teorier som Nätverksteorin, teorin om ?Differential associations? samt Avvikelseteorin har vi kommit fram till flera aspekter kring vårt syfte.

The concept of function represents a major part of mathematics and becomes more significant in school during high school. Throughout history, it has been a difficult concept to define and may create challenges for contemporary students. This literature study aims to identify students' difficulties with the concept of function, as well as to account for how the definition of a function has evolved historically. The literature study has been conducted through database searches in ERIC, Education Research Complete and MathSciNet via EBSCOhost, as well as through chain searching. The study results in identifying that students' difficulties with the concept of function primarily include the graphical and algebraic forms of representation.

Around 85 percent of the total population in Sweden today lives in an urban environment. This means that the nature within the urban areas has come to play an important role for the human well being. At the broader picture, the nature within urban areas is profitable in many ways. It is therefore important for the municipalities around in Sweden to work for sustainability within the urban areas. Linköping adopted an environmental policy, in year 2001, from the delegate of the municipality.

Vocal Cord Dysfunction (VCD) is characterized by paradoxical vocal cord movement during inspiration or expiration, and generally affects adolescents and predominantly women. Previous studies have shown a large inconsistency concerning terminology, definitions, etiology, assessment, differential diagnosis, co-morbidity and treatment. The purpose of this study was to map knowledge on and management of VCD in Sweden. The study was conducted as a written survey addressed to speech-language pathologists and physicians, and attained an answer percentage of 79 percent. The results showed that several professions were involved in the management of these patients, but no clear pattern of referral could be observed.

Försvarsmakten beskriver i Arméns utvecklingsplan 2010-2020 att tre dygns uthållighet på taktisknivå inte är tillräckligt utan bör vara mer flexibelt så att den även passar mindre enheter som skall kunna verka över stora avstånd utan möjlighet till egen logistik. Syftet med uppsatsen är att utreda vad trovärdig uthållighet är. Att utreda om tre dygns uthållighet på taktisk nivå är tillräckligt eller om denna bör utökas till mer än tre dygn. I uppsatsen beskrivs vad som står skrivet i olika dokument från Försvarsmakten vilka styr uthålligheten. Det beskrivs även hur Försvarsmakten avser att uthålligheten skall se ut i framtiden.

The report contains three parts. The first part is a summary and overall presentation of thermalcracks and preventing measures against such cracks. This is a theoretical part where theinterested designer can get acquainted with various alternatives, be guided to more detailedliterature, and receive some practical information regarding the design of the respectivemeasures.The second part deals with calculation of the risk for thermal cracks and design of water coolingas a limiting measure. Two complementary methods are reviewed for efficient calculation:?the handbook method CraX1(by Lulea University of Technology) is used for quickverification?finite differential analysis in the calculationtool ConTeSt Pro for more precise projectingHere is also presented a development of existing standards through design of the cooling systemby means of the Bernoulli equation.