Open Issues in Control ofAutomotive R744 Air-ConditioningSystems

In this thesis, one of the current control algorithms for the R744 cycle, which tries tooptimize the performance of the system by two SISO control loops, is compared to acost-effective system with just one actuator. The operation of a key component of thissystem, a two stage orifice expansion valve is examined in a range of typical climateconditions. One alternative control loop for this system, which has been proposed byBehr group, is also scrutinized.The simulation results affirm the preference of using two control-loops instead of oneloop, but refute advantages of the Behr alternate control approach against one-loopcontrol. As far as the economic considerations of the A/C unit are concerned, usinga two-stage orifice expansion valve is desired by the automotive industry, thus basedon the experiment results, an improved logic for control of this system is proposed.In the second part, it is investigated whether the one-actuator control approach isapplicable to a system consisting of two parallel evaporators to allow passengers tocontrol different climate zones. The simulation results show that in the case of usinga two-stage orifice valve for the front evaporator and a fixed expansion valve forthe rear one, a proper distribution of the cooling power between the front and rearcompartment is possible for a broad range of climate conditions.

Comparison of learning between Digital gallery and Hands-on Laboratory

This thesis has been done in ROM (Royal Ontario Museum) located in Toronto Canada. It focuses on learning in two parts of the museum. It tries to find out how much each part is effective in terms of learning. Studies have been done in the Digital gallery, which has been equipped with digital video projector and workstation that allows visitors to interact with the collections in 2 or 3 dimensional spaces while they are watching the presenting film. The rest of the study was in Hands-on laboratory, which allows students to examine artifacts and discuss their findings .The method was used in this research is Concept mapping .In Digital gallery, 24 schools surveys in the form of pre-post- test by help of the concept mapping method has been done. In Hands-on laboratory, 12 schools have been studied by using the combination of interviewing and written pre post-test of concept mapping.

Vägen till jämställdhet - Kvinnor i styrelserum eller män i förskolan? : En kritisk analys av den svenska jämställdhetsdiskursen

Equality between the sexes has been discussed in Sweden for more than 50 years. In the 60´s and during the 70´s the discourse that dominated the debate was based on the assumption that both men and women needed to liberate themselves from their traditional gender roles. In this approach information and education was perceived as the key to equality. During the 80´s however, power and subordination became the main focal point of concern within this debate, and focus upon changing the patriarchal power structures dominating society were perceived as the principal key for establishing equality between the sexes. Today, the latter discourse still dominates both the scientific and the political perspective upon equality. By examining the debate on equality from two different fields of occupation this paper tries to analyse the fact that the Swedish equality discourse looks very different on male - versus female domination. Although the proportion of male teachers in Swedish preschools is about 3 % and the amount of women serving as public company directors is about 20 %, the current discourse views male dominance within the business sector as problematic, whilst, the dominance of women in the preschool childcare sector as less problematic. In respect of the theory supported by Bourdieu (1999), Hirdman (1990 & 2003) and Foucault (1998 & 2002) this paper advocates that the discourse is biased and simplified and that a perspective that only focuses on areas of male domination sets the wrong priorities. With regards to equality ideals prevalent throughout Norway this paper concludes that the Swedish equality discourse needs a broader and more open approach to assure that Swedish institutions promote equality between men and women in the best possible way.

The Evolution of a Responsibility to Protect in Africa : The African Unions Emerging Peace and Security Regime

The thesis focuses on, and tries to evaluate, the role that the African Union (AU) plays in protecting the peace and security on the African continent. The thesis takes an interdisciplinary approach to the topic by both utilizing international relations and international law theories. The two disciplines are combined in an attempt to understand the evolution of the AU’s commitment to the pragmatist doctrine: responsibility to protect (R2P). The AU charter is considered to be the first international law document to cover R2P as it allows the AU to interfere in the internal affairs of its member states. The R2P doctrine was evolved around the notion of a need to arrive at a consensus in regard to the right to intervene in the face of humanitarian emergencies. A part of the post-Cold War shift in UN behaviour has been to support local solutions to local problems. Hereby the UN acts in collaboration with regional organizations, such as the AU, to achieve the shared aspirations to maintain international peace and security without getting directly involved on the ground. The R2P takes a more holistic and long-term approach to interventions by including an awareness of the need to address the root causes of the crisis in order to prevent future resurrections of conflicts. The doctrine also acknowledges the responsibility of the international community and the intervening parties to actively participate in the rebuilding of the post-conflict state. This requires sustained and well planned support to ensure the development of a stable society.While the AU is committed to implementing R2P, many of the AU’s members are struggling, both ideologically and practically, to uphold the foundations on which legitimate intervention rests, such as the protection of human rights and good governance. The fact that many members are also among the poorest countries in the world adds to the challenges facing the AU. A lack of human and material resources leads to a situation where few countries are willing, or able, to support a long-term commitment to humanitarian interventions. Bad planning and unclear mandates also limit the effectiveness of the interventions. This leaves the AU strongly dependent on regional powerbrokers such as Nigeria and South Africa, which in itself creates new problems in regard to the motivations behind interventions. The current AU charter does not provide sufficient checks and balances to ensure that national interests are not furthered through humanitarian interventions. The lack of resources within the AU also generates worries over what pressure foreign nations and other international actors apply through donor funding. It is impossible for the principle of “local solutions for local problems? to gain ground while this donor conditionality exists.The future of the AU peace and security regime is not established since it still is a work in progress. The direction that these developments will take depends on a wide verity of factors, many of which are beyond the immediate control of the AU.

Hand Gesture Detection & Recognition System

The project introduces an application using computer vision for Hand gesture recognition. A camera records a live video stream, from which a snapshot is taken with the help of interface. The system is trained for each type of count hand gestures (one, two, three, four, and five) at least once. After that a test gesture is given to it and the system tries to recognize it.A research was carried out on a number of algorithms that could best differentiate a hand gesture. It was found that the diagonal sum algorithm gave the highest accuracy rate. In the preprocessing phase, a self-developed algorithm removes the background of each training gesture. After that the image is converted into a binary image and the sums of all diagonal elements of the picture are taken. This sum helps us in differentiating and classifying different hand gestures.Previous systems have used data gloves or markers for input in the system. I have no such constraints for using the system. The user can give hand gestures in view of the camera naturally. A completely robust hand gesture recognition system is still under heavy research and development; the implemented system serves as an extendible foundation for future work.

English Vowels: A World English Perspective

In spite of having a fixed standard of pronunciation, English is being used in various ways in parts of the world, particularly in its way of utterance. English vowel is playing one of the significant roles in making different varieties of English language. This essay tries to see into detail how some phonetic features (formant movement, frequency, pitch) of English vowels vary in relation to Bengali, Catalan, Italian, Spanish and Swedish speakers. It has been found that all these speakers vary a lot from each other in the utterance of English vowels.

Från kvinnans problem till problemfri kvinna : En undersökning av audiovisuell reklam för sanitetsprodukter till menstruerande kvinnor mellan åren 1970 och 2000

This thesis tries trough qualitative analyzes to illuminate advertising and its didactic aspects, how menstruation and menstruating women are portrayed over time. The method underlying the survey is didactic, diachronic comparative and hermeneutic. There will also be a feminist point of view on the material. The issue is about how the advertisement presents sanitary products and menstruation and how a menstruating woman is portrayed.The conclusion is that the image of a menstruating woman changes slightly while consolidating the ethos that menstruation should not be visible. The menstruating woman is in constant motion, always fresh and fragrant.

Definitioner av våld i överlevandes berättelser efter kriget i Bosnien

Definitions of violence in stories of survivors from the Bosnian war Previous research on violence during the war in Bosnia and Herzegovina presents a one-sided picture of the phenomenon ”war violence.” Researchers have emphasized the importance of narratives but they have not focused on stories about war violence, nor have they analyzed the stories of war violence being a product of interpersonal interaction. This article tries to fill this knowledge gap by analyzing the narratives told by survivors of the war in northwestern Bosnia in the 1990s. The aim is to analyze how the survivors describe violence during the war, and also to analyze those discursive patterns that contribute in constructing the category ”war violence.” The construction of the category ”war violence” is made visible in the empirical material when the interviewees talk about (1) a new social order in the society, (2) human suffering, (3) sexual violence, and (4) human slaughter. All interviewees define war violence as morally reprehensible. In narratives on the phenomena ”war violence” a picture emerges which shows a disruption of the social order existing in the pre-war society. The violence practiced during the war is portrayed as organized and ritualized and this creates a picture that the violence practice became a norm in the society, rather than the exception. Narratives retelling violent situations, perpetrators of violence and subjected to violence do not only exist as a mental construction. The stories live their lives after the war, and thus have real consequences for individuals and society.