Bakgrund: Världshälsoorganisationen (WHO), räknar med att unipolär depression kommer bli allt vanligare och att det år 2020 kommer klassas som det näst största hälsoproblemet i världen. Detta medför att sjuksköterskor kommer att träffa på dessa patienter inom alla vårdenheter. För att kunna utföra omvårdnadsarbetet på ett optimalt sätt behöver sjuksköterskan ha kunskap om patienternas upplevelser av hur det är att drabbas av och leva med en unipolär depression. Syfte: Var att belysa individers upplevelser av hur det är att drabbas av och leva med en unipolär depression. Metod: En litteraturstudie baserad på tio vetenskapliga artiklar genomfördes. Resultat: Sammanställningen gav tre kategorier: Upplevelser som finns hos individen innan diagnosen ställts, Hur individerna upplever och hanterar sitt dagliga liv, Vägen till återhämtning och finna meningen med livet igen. Diskussion: Tre fynd diskuterades: Depression framkallar en låg självkänsla, Depressionen skapar lidande hos individen, Att förändra livsstilen är ett måste. Slutsats: Många individer med depression har liknande upplevelser av att leva med sjukdomen men som sjuksköterska är det ändå viktigt att inte generalisera upplevelserna utan istället bekräfta patienternas berättelser och kunna se till varje enskild individs behov. / Background: The World Health Organization (WHO) estimates that unipolardepression will become increasingly common and that by 2020 it will be classed as thesecond largest health problem in the world. This means that nurses will encounter thesepatients in all care units. In order to perform nursing work in an optimal way, the nursewill need knowledge of patients' experiences of living with unipolar depression. Aim:The aim of this study was to illuminate individual perceptions of what it is like tobecome afflicted and living with unipolar depression. Method: A literature reviewbased on ten scientific articles was conducted. Result: The statement gave threecategories; 1) Experiences that are part of the individual before the diagnosis made, 2)How individuals experience and cope with their daily lives, 3) The road to recovery andregaining a meaning of life. Discussion: Three findings were discussed; 1) Depressioncauses a low self-esteem, 2) Depression creates suffering in the individual, 3)Changing lifestyle is a must. Conclusion: Many individuals with depression sharesimilar experiences of living with the disease. However, its important for the nurse tonot generalize these experiences but instead confirm the patients' stories and see to theneeds of each individual.

¡@¡@In this thesis, we develop a self-humidifying PEMFC. The humidifying effects on the stability and impedance of the fuel cell are studied. A portable and passive PEMFC stack usually exposes in the ambient no matter that it works or not. However, the ambient is far from saturated. The water within MEA will diffuse to the membrane¡¦s surface and evaporate continuously. The membrane will be short in water without water supplying. Because the conductivity of H+ of the membrane is highly dependent on water content, the dehydration of the membrane will reduce the interconnected passageway of H+ and affect the performance of fuel cell directly. And because of the different expansion rate the electrode of MEA is also possible to separate from its membrane when it operates repeatedly. This separation will make the performance of fuel cell an unrecovered decay. ¡@¡@At first, the hydration status of the dry membrane is observed. We measure the addition weight of water into membrane by using cotton thread humidifying, and estimate the water permeation distances. The maximum water supply rate of cotton thread is 4.26mg/min, and the permeation rate of water through membrane where is 2.5cm from water surface is 0.15mg/cm¡Dmin. Then we design the self-humidifying devices of PEMFC stack. The humidifying effects on performance and stability of the fuel cell are studied. ¡@¡@When the active area is 0.7¡Ñ4.5cm2 and the cotton thread is 5mm from the center of electrode the supplying water can arrive at the reaction area under the electrode through the membrane in one minute. The difference of the supplying water between the bottom and top is 7% by using 6cm cotton thread. Therefore water can hydrate the membrane and the difference of the supplying water between bottom and top is not oversize. The higher current load, the voltage efficiency is lower. The increasing heat generation rate results in the water evaporation rate would be greater than the water generation rate. So the drop of voltage under higher current is greater than lower current. By comparing with the difference of high frequency impedance the change of humidifying is smaller between 1hr operating. It indicates that humidifying by cotton thread keeps the membrane hydration.

In this thesis, we propose a high density non-classical unipolar CMOS width two embedded oxide (2EO) NMOS load. The words ¡§unipolar CMOS¡¨ refer to the fact that the conventional NMOS driver and the proposed 2EO NMOS load are presented in which the electron is the only carrier used. Among them, the 2EO scheme is used to isolate the inversion current. And the dominant current in the 2EO NMOS load is the punch through current which is not a destructive current mechanism. Our proposed CMOS, due to the same carrier used, does not have to compensate the layout width in load design. In addition, the shared terminal of output contacts and the elimination of N-well technique are also presented in our proposed CMOS. Therefore, the layout area can be reduced 72%, in comparison with conventional CMOS. Furthermore, the packing density can be increased and the fabrication cost can be reduced, respectively. We also find out that the delay time can be improved 39% to increase the operating frequency, as compared with the convention CMOS.

In this thesis, we present a high-speed non-classical unipolar CMOS with a thick sidewall-spacer gate-oxide NMOS load. This unipolar CMOS is composed of a NMOS driver and a thick sidewall-spacer gate-oxide NMOS which replaces a PMOS as load. We focus on the investigation of punch-through current in unipolar CMOS trends. In addition, we also design a conventional CMOS for comparison. According to the simulations, the logical characteristics of our proposed CMOS are valid, in which the average propagation delay time is improved 20 % compared with the conventional CMOS. This is due to the presence of a thick sidewall-spacer gate-oxide NMOS load. For the viewpoint of device fabrication, the N well process can also be eliminated. This means that the proposed NMOS load not only improves the CMOS speed, but also reduces the fabrication cost. Thus, because of the shared-terminal output, the layout area can be significantly decreased 41 %, in comparison with the conventional CMOS.

A new type of heterogeneous carbon fiber bunch bipolar plate developed in our lab is applied to portable pure hydrogen proton exchange membrane fuel cell stacks. Several different types of bipolar plate structures have been designed, and the voltages and currents of these fuel cell stacks are measured to compare their performance. The new type of heterogeneous carbon fiber bunch bipolar plate is well in low contact resistance, weight low, small volume and the flexible geometry shape. Due to its flexible structure of carbon fiber bunch, the compressing pressure is small while assembling stack so that the electrode can not be over compressed and out of shape. Therefore the high porosity of diffusion layer can be keep and reaction gas can enter and distribute to all reaction areas easily. For using to portable equipments, a small 6-cell flat type of fuel cell stack are developed firstly. The total weight is about 75g and the total volume is about 68cm . The second stack is cylinder-type(I) fuel cell stack. The total weight is about 60g and the total volume is about 71cm . The third stack is cylinder-type (II). The total weight has been reduced to about 20g and the total volume has been reduced to about 30cm . Above three kinds of the 6-cell stacks the total electrode area is 13.5cm . Using Nafion, the catalyst content anode Pt 0.4mg/cm , cathode Pt 1.0mg/cm , On room temperature and inlet hydrogen gauge pressure 0.15atm air-breathing, total output power of the cylinder (II) can reach 1.85W, and the power density of unit area can reach about 137mW/cm^2.

During the Cold War era, the edifice of the world configuration was built on a bipolar structure. The security of west European countries was not only important in the eyes of the Europeans but also in the American ones. But the end of this era in 1989-91 also put an end to this world structure and brought it into a unipolar one. The US became the world hegemon and Europe started to fear that US security priority would not remain Europe in the awakening of this structure. Therefore, some improvements occurred in terms of EU cooperation security in the framework of the conflict in Kuwait, but the main change happened because of the conflict in Ex-Yugoslavia. Especially Great Britain and France became aware of the need to develop an EU military capability in order to handle autonomous peace-keeping operations, outside of the NATO framework. The EU understood that any action developed by NATO was reliant on the US and without the support of the US the possibility to operate was restrained. The move towards a more autonomous European security from the cooperation within NATO created a fear of loss of American influence over European politics. However, when the EU stated that NATO would remain the primary organisation to handle European security matters and that the CFSP would only reinforce the European pillar of NATO, the US appeared to support the cementation of this pillar. France, Germany and Great Britain are contributing actively to the development of this pillar and they have all their reasons to support it. Germany is self-committed to the European integration process and cooperation in order, on one hand, to inhibit the raise of nationalism into Germany and on the other hand, to use it as a mean to play a major role in the international arena. France is a medium size power trying to keep its voice in the world arena. Its presence in the EU is marked by its strong link with Germany to enhance its role internationally. France uses the EU in order to promote its national interests. Great Britain maintains special relations vis-à-vis of the US and has not the desire to commit to any European cooperation that could hurt or threaten this link. But Great Britain changed its attitude towards its foreign and security policy due to its new interpretation of the structure during the Ex-Yugoslavian conflict. Therefore, its policy shifted in the need to develop a closer EU cooperation within the security, even if they stated that NATO still remains the primary organisation to handle European Security. This change is also strategic because Great Britain is motivated to become a EU leader instead of a spoiler. The EU has to face a number of issues in different areas before it will be able to implement an efficient CFSP. First of all, the military capability gap that has widened the dependence on NATO military assets. Secondly, the difficult decision making process that has to deal with the domestic demands of all MS generated by a reluctance in ceding sovereignty of security matters to a qualified majority vote. The development of the CFSP has electrified the transatlantic relations creating tensions but nothing that will damage the transatlantic link between the EU and the US. The CFSP will become complementary of NATO and not a competitor at all. The military capabilities and the domestic demands of all EU MS will guarantee this statement. The US will remain an unenthusiastic global actor in a unipolar world, pushing the international agenda in favour of a unilateral approach.

No description available.

Background. This article presents prospective longitudinal findings on prevalence, incidence, patterns of change and stability of depressive disorders in a community sample of 1228 adolescents. Methods. Data were collected at baseline and follow-up (20 months later) in a representative population sample of 1228 adolescents, aged 14–17 at baseline. Diagnostic assessment was based on the Munich Composite International Diagnostic Interview (M-CIDI). Results. The overall cumulative lifetime incidence of any depressive condition was 20·0% (major depressive disorder (MDD), 12·2%; dysthymia, 3·5%; subthreshold MDD, 6·3%), of which about one-third were incident depressions in the period between baseline and follow-up. Depressive disorders rarely started before the age of 13. Females were about twice as likely as males to develop a depressive disorder. Overall, the 20-month outcome of baseline depression was unfavourable. Dysthymia had the poorest outcome of all, with a complete remission rate of only 33% versus 43% for MDD and 54% for subthreshold MDD. Dysthymia also had the highest number of depressive episodes, and most psychosocial impairment and suicidal behavioural during follow-up. Treatment rates were low (8–23%). Subthreshold MDD associated with considerable impairment had an almost identical course and outcome as threshold MDD. Conclusions. DSM-IV MDD and dysthymia are rare before the age of 13, but frequent during adolescence, with an estimated lifetime cumulative incidence of 14%. Only a minority of these disorders in adolescence is treated, and more than half of them persist or remit only partly.

The aim of this thesis is to propose an algorithm for visualization of spatial digital geographic data, including both thematic and topographic content of a map, using unipolar anamorphosis method with the use of GIS. Three different approaches for transformation of topographic content of a map are discussed. In addition to the algorithm, a methodology of displaying spatial data using this method is presented. The problems associated with the use of geographic unipolar anamorphosis are described, geographic phenomena which can be visualized by this method are determined, and requirements for digital data input are defined. The practical output of this thesis is a toolbox for the ArcGIS software by ESRI which serves to visualize geographic data by unipolar anamorphosis method.

Common mode performance is important for photovoltaic applications where the common mode voltage can become hazardous to people near the solar installation and can cause reliability concerns in inverters. The proposed dual-buck inverter uses hybrid unipolar modulation and a topology that is modified from the standard full-bridge dual-buck inverter to address the common mode voltage concerns. In the proposed design, the fast-switching side of the inverter is identical to a half-bridge dual-buck inverter, while the side that switches at line frequency uses a half-bridge of the standard H-bridge inverter topology. The motivation of this design is to realize the benefits of unipolar modulation and the dual-buck topology, while improving the poor common-mode voltage performance associated with unipolar modulation by utilizing hybrid switching. Unipolar switching has benefits which carry over to the hybrid switching scheme, such as reduced current ripple allowing use of smaller inductors. Additionally, the dual-buck topology enables the effective use of faster switches due to the elimination of dead time and reverse recovery concerns by using devices such as wide-bandgap GaN HEMTS and SiC Schottky diodes. The proposed inverter topology also realizes the benefits of the dual-buck topology while using half of the number of diodes and inductors compared to a standard full-bridge dual-buck inverter. The use of this modified dual-buck topology and hybrid unipolar modulation results in an inverter which has favorable common mode voltage characteristics. These characteristics indicate that this inverter would be useful in applications sensitive to common mode voltage concerns, such as photovoltaic applications. The performance of this topology using hybrid unipolar modulation is investigated using simulations and by creating and testing a 300-watt prototype inverter. / Master of Science / The popularity of photovoltaic panels has been increasing rapidly in recent years due to popular desire to reduce reliance on nonrenewable energy sources and steady reductions in the cost of solar power installations. The DC power provided by photovoltaic panels requires an inverter to create AC power to interface with the grid. However, in some scenarios the common-mode voltage can induce leakage current in the system, which can be hazardous to nearby people. Leakage current is larger for systems with high parasitic capacitance and for inverters that create high frequency components in their common mode voltage. Photovoltaic panels tend to have high parasitic capacitance, causing leakage current concerns. Additionally, advancements in wide bandgap devices enable inverters to operate at increasingly higher switching frequencies, and this is typically advantageous because it allows size reduction of expensive and heavy components used in inverter output filters. However, this can exacerbate leakage current concerns by introducing high frequency components to the common mode voltage. These developments create an incentive to investigate inverter designs that can mitigate leakage current concerns by creating favorable common mode voltage waveforms. Many existing solutions require circuit topologies with additional switches or use additional components like an isolation transformer or an additional common mode filter. These solutions add cost and complexity to inverter design. This thesis investigates a circuit topology based on a dual-buck inverter using hybrid unipolar switching, which will effectively utilize wide bandgap devices operating at high frequencies. The use of hybrid unipolar switching produces favorable common mode voltage characteristics that mitigates leakage current concerns while maintaining the quality of the output waveform, and the topology uses fewer diodes and inductors than a traditional dual-buck inverter. The design is evaluated through simulation and by creating and testing a 300-watt prototype to determine if it is suitable for photovoltaic applications and other applications where common mode voltage and leakage current are major concerns.