958 resultados para master-oscillator power amplifier (MOPA)


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The focus of this thesis is the marine environmental history of the eastern part and the estuary of the Kymi river from 1945 to 1970. There is no previous research on this area from an environmentally historical perspective, nor have many of the sources here discussed been previously used. Therefore the thesis expands academic understanding of local environmental processes and protection in and around the city of Kotka and the Kymi river. The thesis falls within the methodological field of socio-political history, as the research focus is centered on the local process of establishing the nature of environmental problems and solving them. The principal assumption has been that the city of Kotka, due to its ongoing expansion, was slow to respond to environmental hazards. The Kymi river was among the most degraded bodies of water during this period. Kotka on the other hand was a major center of wood processing industry and one of Finlands major industrial ports. In the past the river and its estuary had provided ample resources for fishers. It is this contradictory use of the environment that allows one to discuss the local struggle for the correct use of the environment. Primary sources include local and city archives, environmental studies, and legal documents linked with the above. The archives of the city of Kotka and of various private associations form the core sources. Environmental studies from the research period have been dealt with as sources to the local political power struggle. Alongside with current environmental research they also provide insight into the state of the environment. Another goals has been to accumulate environmental research for a future multidisciplinary study in this area. As a final conclusion it can be said that environmental degradation was widely understood as a problem only in the 1960s. The influential role of the city of Kotka however determined the pace with which these problems were then solved.

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The study discusses the position of France as the United States’ ally in NATO in 1956-1958. The concrete position of France and the role that it was envisioned to have are being treated from the point of view of three participants of the Cold War: France, the United States and the Soviet Union. How did these different parties perceive the question and did these views change when the French Fourth Republic turned into the Fifth in 1958? The study is based on published French and American documents of Foreign Affairs. Because of problems with accessibility to the Soviet archival sources, the study uses reports on France-NATO relations of Pravda newspaper, the official organ of the Communist Party of the USSR, to provide information about how the Soviet side saw the question. Due to the nature and use of source material, and the chronological structure of the work, the study belongs methodologically to the research field of History of International Relations. As distinct from political scientists’ field of research, more prone to theorize, the study is characteristically a historical research, a work based on qualitative method and original sources that aims at creating a coherent narrative of the views expressed during the period covered by the study. France’s road to a full membership of NATO is being treated on the basis of research literature, after which discussions about France’s position in the Western Alliance are being chronologically traced for the period of last years of the Fourth Republic and the immediate months of coming back to power of Charles de Gaulle. Right from the spring of 1956 there can be seen aspirations of France, on one hand, to maintain her freedom of action inside the Western Alliance and, on the other, to widen the dialogue between the allies. The decision on France’s own nuclear deterrent was made already during the Fourth Republic, when it was thought to become part of NATO’s common defence. This was to change with de Gaulle. The USA felt that France still fancied herself as a great power and that she could not participate in full in NATO’s common defence because of her colonies. The Soviet Union saw the concrete position of France in the Alliance as in complete dependence on the USA, but her desired role was expressed largely in “Gaullist” terms. The expressions used by the General and the Soviet propaganda were close to each other, but the Soviet Union could not support de Gaulle without endangering the position of the French Communist Party. Between the Fourth and Fifth Republics no great rupture in content took place concerning the views of France’s role and position in the Western Alliance. The questions posed by de Gaulle had been expressed during the whole period of Fourth Republic’s existence. Instead, along with the General the weight and rhetoric of these questions saw a great change. Already in the early phase the Americans saw it possible that with de Gaulle, France would try to change her role. The rupture took place in the form of expression, rather than in its content.

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In the autumn of 1997, Russian government was faced with media pressure when owners of the TV channels ORT and NTV joined forces against it. This study is based on media sources from October 1997 to December 1997. It shows clearly how the enormous power of the media was able to dictate what happened in Russia. In the mid-1990s Russians started to talk about political technology, which became a commonly used term by professionals, journalists, politicians and intelligence services. As a result of this action, two leading reformers in the government, Anatoliy Chubais and Boris Nemtsov, were dismissed from their highly influential posts as finance and energy ministers respectively, but retained their power as first deputy prime ministers. According to the correspondents, the real reason was to resolve a conflict within the parliament, which had demanded the dismissal of Mr. Chubais. This demand was presented after Chubais had accepted $90,000 as a reward for co-writing a book on privatization. Chubais was considered to be Russia’s “business card” towards the west – the"Authors’ case" (Delo avtorov) was only solved after President Boris Yeltsin took part in the public debate. According to the research, the media owned by powerful businessmen Boris Berezovsky and Vladimir Gusinski, was able to use its own security services to expose sensitive material (Russian term ‘kompromat’), if necessary, concerning any given person. The so-called Authors’ case can be considered as a part of the battle and the tip of the iceberg in arrangements designed to organize the funding of the Russian presidential election campaign in 2000. The reason why this particular incident was so widely covered on television was because several programs aimed to reveal to the public "hidden bribes" that, as they claimed, government officials had received. The political aspect, however, was quite mild, when the concrete issues of possible dismissals of Ministers were debated in the Parliament. Everything was dealt with as a “family matter” inside Kremlin. Yeltsin's "family" consisted of practically anybody from oligarch Berezovsky to Chubais, the father of Russia's privatization policy. Methods of critical history implementation analysis has been used in this research in determining the use of the source material. Literature and interviews have also provided a good base for the study. The study proves that any literature dealing with the subject has not paid enough attention to how the dismissal of Alexander Kazakov, deputy of President’s administration, was linked directly with Gazprom, the state gas monopoly. Kazakov had to leave Gazprom and lose his position as Chubais' ally when the influential ORT television company was deteriorated.

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The paper presents a new criterion for designing a power-system stabiliser, which is that it should cancel the negative damping torque inherent in a synchronous generator and automatic voltage regulator. The method arises from analysis based on the properties of tensor invariance, but it is easily implemented, and leads to the design of an adaptive controller. Extensive computations and simulation have been performed, and laboratory tests have been conducted on a computer-controlled micromachine system. Results are presented illustrating the effectiveness of the adaptive stabiliser.

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Para-Bose commutation relations are related to the SL(2,R) Lie algebra. The irreducible representation [script D]alpha of the para-Bose system is obtained as the direct sum Dbeta[direct-sum]Dbeta+1/2 of the representations of the SL(2,R) Lie algebra. The position and momentum eigenstates are then obtained in this representation [script D]alpha, using the matrix mechanical method. The orthogonality, completeness, and the overlap of these eigenstates are derived. The momentum eigenstates are also derived using the wave mechanical method by specifying the domain of the definition of the momentum operator in addition to giving it a formal differential expression. By a careful consideration in this manner we find that the two apparently different solutions obtained by Ohnuki and Kamefuchi in this context are actually unitarily equivalent. Journal of Mathematical Physics is copyrighted by The American Institute of Physics.

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The paper presents a method for transmission loss charge allocation in deregulated power systems based on Relative Electrical Distance (RED) concept. Based on RED between the generator and load nodes and the predefined bilateral power contracts, charge evaluation is carried out. Generally through some power exchange mechanism a set of bilateral contracts are determined that facilitate bilateral agreements between the generation and distribution entities. In this paper the possible charges incurred in meeting loads like generation charge, transmission charge and charge due to losses are evaluated. Case studies have been carried out on a few practical equivalent systems. Due to space limitation results for a sample 5 bus system are presented considering ideal load/generation power contracts and deviated load/generation power contracts. Extensive numerical testing indicates that the proposed allocation scheme produces loss allocations that are appropriate and that behave in a physically reasonable manner.

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Helsingin ja Tallinnan välillä liikennöinyt Copterlinen helikopteri putosi mereen 10.8.2005. Tarkastelen aiheen uutisointia Viron ja Suomen lehdistössä ja siitä mediapalstoilla käytyä “sotaa”. Tutkimuksen tavoitteena on selvittää minkälaisin keinoin mediasotaa käydään. Analysoin lähemmin yhden artikkelin Iltasanomista, Iltalehdestä, Turun Sanomista, Helsingin Sanomista ja Õhtuleht- ja Postimees-lehdistä. Teoreettisena pohjana käytän Norman Faircloughin teoksessa Language and Power esitettyä kriittistä diskurssianalyysiä. Käytän lisäksi mm. Tiit Hennosten kirjaa Uudise käsiraamat ja Reet Kasikin artikkeleita tekstianalyysistä. Mediasotaan osallistuvat laatulehdiksi luokiteltavat Turun Sanomat, Eesti Päevaleht, Postimees ja Turun Sanomat ja iltapäivälehdiksi luokiteltavat Iltalehti, Iltasanomat ja Õhtuleht. Helsingin Sanomat ei osallistunut mediasotaan, vaan keskittyy objektiiviseen uutisointiin. Keskeisin keino luoda sukellussota on vastakkainasettelu. Suhteet virolaisten ja suomalaisten välillä luodaan kansalaisuussanoilla suomalaiset ja virolaiset. Lukijoille kategorisoidaan maailma virolaiseksi ja suomalaiseksi. Positiivisia ja negatiivisia seikkoja asetetaan vastakkain luomalla tekstin sisäisiä antonyymipareja kuten nopea/ hidas, pieni ryhmä/ suuri ryhmä. Toimittajat luovat lähteilleen ja osallistujille auktoriteettia antamalla heille vastakkain matalan tai korkean statuksen kuten ministeri/ kadunmies. --- Suomalaiset lehdet käyttävät toimittajien itse keksimiä metaforia. Ekspressiivisiä sanoja käytetään välittämään tunteita, asenteita ja ajatuksia. Artikkeleissa hämärretään agentit kieliopin avulla. Käyttämällä passiivia, refleksiivisiä verbejä ja subjektittomia lauseita, esitetään prosesseja toisenlaisina kuin ne ovat ja jätetään näin aktiiviset tekijät mainitsematta. Artikkeleiden alku- ja loppulauseita vertaillessa voi havaita, että syytöksiä, spekulaatioita ja väitteitä esiintyy artikkeleiden otsikoissa ja ensimmäisissä lauseissa. Suomalaiset puolustautuvat huonojen pelastustyöntekijöiden leimaa vastaan ja virolaiset puolestaan oppipojan leimaa vastaan. Vasta-argumentteja tuodaan vain vähän ja ne sijoitetaan viimeisiksi. Molempien maiden lehdistöt kritisoivat viranomaisia. Artikkelit eivät noudata ideaaliuutisen kriteerejä.

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Failures in industrial organizations dealing with hazardous technologies can have widespread consequences for the safety of the workers and the general population. Psychology can have a major role in contributing to the safe and reliable operation of these technologies. Most current models of safety management in complex sociotechnical systems such as nuclear power plant maintenance are either non-contextual or based on an overly-rational image of an organization. Thus, they fail to grasp either the actual requirements of the work or the socially-constructed nature of the work in question. The general aim of the present study is to develop and test a methodology for contextual assessment of organizational culture in complex sociotechnical systems. This is done by demonstrating the findings that the application of the emerging methodology produces in the domain of maintenance of a nuclear power plant (NPP). The concepts of organizational culture and organizational core task (OCT) are operationalized and tested in the case studies. We argue that when the complexity of the work, technology and social environment is increased, the significance of the most implicit features of organizational culture as a means of coordinating the work and achieving safety and effectiveness of the activities also increases. For this reason a cultural perspective could provide additional insight into the problem of safety management. The present study aims to determine; (1) the elements of the organizational culture in complex sociotechnical systems; (2) the demands the maintenance task sets for the organizational culture; (3) how the current organizational culture at the case organizations supports the perception and fulfilment of the demands of the maintenance work; (4) the similarities and differences between the maintenance cultures at the case organizations, and (5) the necessary assessment of the organizational culture in complex sociotechnical systems. Three in-depth case studies were carried out at the maintenance units of three Nordic NPPs. The case studies employed an iterative and multimethod research strategy. The following methods were used: interviews, CULTURE-survey, seminars, document analysis and group work. Both cultural analysis and task modelling were carried out. The results indicate that organizational culture in complex sociotechnical systems can be characterised according to three qualitatively different elements: structure, internal integration and conceptions. All three of these elements of culture as well as their interrelations have to be considered in organizational assessments or important aspects of the organizational dynamics will be overlooked. On the basis of OCT modelling, the maintenance core task was defined as balancing between three critical demands: anticipating the condition of the plant and conducting preventive maintenance accordingly, reacting to unexpected technical faults and monitoring and reflecting on the effects of maintenance actions and the condition of the plant. The results indicate that safety was highly valued at all three plants, and in that sense they all had strong safety cultures. In other respects the cultural features were quite different, and thus the culturally-accepted means of maintaining high safety also differed. The handicraft nature of maintenance work was emphasised as a source of identity at the NPPs. Overall, the importance of safety was taken for granted, but the cultural norms concerning the appropriate means to guarantee it were little reflected. A sense of control, personal responsibility and organizational changes emerged as challenging issues at all the plants. The study shows that in complex sociotechnical systems it is both necessary and possible to analyse the safety and effectiveness of the organizational culture. Safety in complex sociotechnical systems cannot be understood or managed without understanding the demands of the organizational core task and managing the dynamics between the three elements of the organizational culture.

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Objective: Attention deficit hyperactivity disorder (ADHD) is a life-long condition, but because of its historical status as a self-remitting disorder of childhood, empirically validated and reliable methods for the assessment of adults are scarce. In this study, the validity and reliability of the Wender Utah Rating Scale (WURS) and the Adult Problem Questionnaire (APQ), which survey childhood and current symptoms of ADHD, respectively, were studied in a Finnish sample. Methods: The self-rating scales were administered to adults with an ADHD diagnosis (n = 38), healthy control participants (n = 41), and adults diagnosed with dyslexia (n = 37). Items of the self-rating scales were subjected to factor analyses, after which the reliability and discriminatory power of the subscales, derived from the factors, were examined. The effects of group and gender on the subscales of both rating scales were studied. Additionally, the effect of age on the subscales of the WURS was investigated. Finally, the diagnostic accuracy of the total scores was studied. Results: On the basis of the factor analyses, a four-factor structure for the WURS and five-factor structure for the APQ had the best fit to the data. All of the subscales of the APQ and three of the WURS achieved sufficient reliability. The ADHD group had the highest scores on all of the subscales of the APQ, whereas two of the subscales of the WURS did not statistically differ between the ADHD and the Dyslexia group. None of the subscales of the WURS or the APQ was associated with the participant's gender. However, one subscale of the WURS describing dysthymia was positively correlated with the participant's age. With the WURS, the probability of a correct positive classification was .59 in the current sample and .21 when the relatively low prevalence of adult ADHD was taken into account. The probabilities of correct positive classifications with the APQ were .71 and .23, respectively. Conclusions: The WURS and the APQ can provide accurate and reliable information of childhood and adult ADHD symptoms, given some important constraints. Classifications made on the basis of the total scores are reliable predictors of ADHD diagnosis only in populations with a high proportion of ADHD and a low proportion of other similar disorders. The subscale scores can provide detailed information of an individual's symptoms if the characteristics and limitations of each domain are taken into account. Improvements are suggested for two subscales of the WURS.

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This thesis investigates China's film internationalism and coproduction strategy based on three cases: Hong Kong and China film coproduction; US and China without any state-level agreements; Australia and China based on an official coproduction treaty. It investigates the evolution of coproduction in the film industry, the process of coproduction, foreign film companies' strategies of adjustment to state policies, and the culture and complexities that hinder coproduction. It surveys the current environment for China film coproduction and investigates the degree to which film coproduction has been - to this stage - a contributor to China's global cultural presence – its soft power.

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The thesis aims to link the biolinguistic research program and the results of studies in comceptual combination from cognitive psychology. The thesis derives a theory of syntactic structure of noun and adjectival compounds from the Empty Lexicon Hypothesis. Two compound-forming operations are described: root-compounding and word-compounding. The aptness of theory is tested with finnish and greek compounds. From the syntactic theory semantic requirements for conceptual system are derived, especially requirements for handling morphosyntactic features. These requirements are compared to three formidable theories of conceptual combination: relation theory CARIN, Dual-Process theory and C3-theory. The claims of explanatory power of relational distributions of modifier in CARIN-theory ared discarded, as the method for sampling and building relational distributions is not reliable and the algorithmic instantiation of theory does not compute what it claims to compute. From relational theory there still remains results supporting existence of 'easy' relations for certain concepts. Dual-Process theory is found to provide results that cannot in theory be affected by linguistic system, but the basic idea of property compounds is kept. C3-theory is found to be not computationally realistic, but the basic results of diagnosticity and local properties (domains) of conceptual system are solid. The three conceptual combination models are rethought as a problem of finding the shortest route between the two concepts. The new basis for modeling is suggested to be bare conceptual landscape with morphosyntactiic or semantic features working as guidance and structural features of landscape basically unknown, but such as they react to features from linguistic system. Minimalistic principles to conceptual modeling are suggested.

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Topic avoidance in romantic relationships has not been researched before in Finnish speech communication research, and this study was expected to increase the understanding of a phenomenon that acquires relatively dramatic attributes in everyday conversation. The aim of this study was to describe topic avoidance based on what was told in the interviews, and to describe the beliefs concerning functional or dysfunctional relational communication that can be interpreted from the interviewees' speech when they talk about topic avoidance. The theoretical reference frame of this study consists of the Communication Privacy Management Theory, relational dialectics, and earlier, mostly American research on topic avoidance. Ten Finnish people aged 22-31, who all had previous experience on one or more marital or common-law relationships were interviewed for this study. Additional material for the study was gathered from the interviewees by using the role playing method to describe interactional events where something essential is left unsaid in the context of romantic relationship. The following values were attributed to functional communication in romantic relationships: openness, equality, honesty, trust and positivity. The dialectical nature of the phenomenon being researched is evident in the way that along with openness, the interviewees talked about excessive openness that should occasionally be avoided in the context of relational communication by leaving things unsaid. Topic avoidance was seen both as a conscious strategic communication for managing privacy, and as an uncontrollable force of nature that at its worst destroys the relationship. When topic avoidance is seen as strategic communication, the choice concerning what is left unsaid is made by weighing the following dimensions asgainst each other: risks/ benefits (for self, relationship), protects/ does not protect (self, partner, relationship), burdens/ does not burden (self, partner, relationship), honesty/ dishonesty, responsibility lies with self/ responsibility does not lie with self. Topic avoidance was acceptable if it was used in order to preserve the relationship, as opposed to gaining power in the relationship or causing insecurity for the partner. The acceptability of topic avoidance varied according to whether it differed from lying or not. When the interviewees talk about topic avoidance, their speech can be interpreted to mean that in spite of uncontrollability, communicative choices can be made in relational communication and that skills concerning communication in romantic relationships can be learned.

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Changes in governance in the public sector made it possible to give the power to the level of service production. In Finland schools were diversified. They wanted to be as attractive as possible. In her dissertation (2006) Piia Seppänen studied parental choice and schools choice policies in Espoo, in Kuopio, in Lahti, inTurku and in some levels in Helsinki too. After her study was done there has been some changes in school choise policy in Espoo. The catchments areas changed radically; earlier every school did have its own catchment area. But now three or even five school has the same catchment area. On the base of the Seppänen’s dissertation I wondered who’s choice it really were? Is the choice maker customer or producer of the service? In my study I tried to understand those processes where pupils were selected for the 7th grade in lower secondary schools in the spring in 2006. To make the picture clear, I have to study the history of pupil selection and the changes of it in the 21st century. I also have to study the geography of the town which is quite special in comparison with the normal cities with one central area. This has its own effects on the pupil selection system as well as in the whole study. In my study I try to present what kind of process the pupil selection is in Espoo and how it was done actually in the spring of 2006. The empirical data of my study were statistical data, documents of different kind, conversations with principals, local authorities and politicians. I also interviewed one politician and observed a few information meetings about the pupil selection process. Based on this large variety of data I tried to draw a picture of the way of speaking (writing) about the ability of the choice. Furthermore, how this pupil selection is done in reality. The ability to apply to special instruction in f. e. music, graphic arts or maths and sciences or to language based instruction (bilingual and immersion teaching) depends on the district you live. Because there is one catchment area which has no special or language based instruction available. Also the poor public transport system might have some effects on the parental choice. According to my study, 20 % of the 7th grade pupils were selected with criteria of different kind to special classes. Because the ability to get special or language based instruction depends on your district, there is a big risk for a selection based on the pupils' socio-economic background.

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There has been a change in university´s position in society during the last of decades from traditional university to result-based university. Result-based is considered as a steering mechanism. The context in this study is the period when the New Salary System was introduced. In the New Salary System salary is based on the performance appraisal made by the supervisor. The purpose of the study was to understand the discussion of the New Salary System and how this discussion should be interpreted. The research task had two parts. In the first part the objective was to identify how the academic work was conceptualised. In the second part I analyzed how one related to the New Salary System and how this was interpreted in relation to representation of academic work. The research material consisted of webblogs from the year 2005. Webblogs were located in the internet and one had free access to them. Mostly employees from Finnish universities wrote to them. Besides the salary system writers discussed the university and the academic work. Two different ways of talking about the academic work were found in research material. In the first one the academic work was based on community and in the second one on individuality. When community was emphasized writers discussed also science and research and academic traditions such as peer review. When individuality was emphasized writers discussed individual performance and the importance of salary according to one´s performance. The analysis shows that the New Salary System was opposed and supported. Opposition was based on arguments for the traditional university; peer review, truth, academic profession, academic community and university’s autonomy are the most important arguments. Supporters used arguments such as the need to make individual´s performance visible and breaking the existing power structures.