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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
321

Foreign Direct Investment in the Financial Sector. The Engine of Growth for Central and Eastern Europe?

Eller, Markus, Haiss, Peter, Steiner, Katharina January 2005 (has links) (PDF)
This paper examines the impact of financial sector foreign direct investment (FSFDI) on economic growth by estimating a panel data model for 11 Central and Eastern European countries (CEECs) between 1996 and 2003 in a cross-country growth accounting framework. The analysis concentrates on the efficiency channel linking FSFDI to economic growth. The results clearly indicate that there can be a relationship between FSFDI and economic growth. Approaching a medium degree of financial M&A is rewarded by higher economic growth after two periods. Beyond it, FSFDI seems to spur economic growth depending on a higher human capital stock. FSFDI-induced knowledge-spillovers to domestic banks can be an explanation for this phenomenon. Above a certain threshold, the crowding-out of local physical capital caused by the entry of a foreign bank seems to hamper economic growth. The value of the paper lies in (1) providing novel data on FSFDI in CEECs, (2) analyzing the impact of FDI on a sectoral level and (3) in modeling the hitherto only qualitatively discussed relationship between foreign banks and economic development into a structural, econometric model that combines two streams of economic research: the FDI-growth-literature and the finance-growth-literature. (author's abstract) / Series: EI Working Papers / Europainstitut
322

Does Culture Matter? Understanding Cultural Representation in the Writing of First to Third Generation Mexican American Students in a Transitional High School to College Program

Aguilar, Liz Ann Báez 2010 August 1900 (has links)
This doctoral dissertation intends to contribute to an understanding of the experiences of Mexican American students in a high school to college transitional program and how their culture influences their writing. The transitional program used for the study was located at a community college in the Southwest. This qualitative study incorporated the research instruments of interviews and writing samples using discourse analysis. From the results of this study, several themes emerged and demonstrated how both cultural and social capital are significant in these students’ experiences as they participate in the transitional high school to college program. Research has asserted the high rates of Mexican American students dropping out of school and not completing higher education. This study will enable us to help reduce the current rate of attrition and help students complete their higher education. This study’s findings have implications for the field of adult education because they provide a lens to understand the importance of cultural and social capital as they relate to adult students learning in the classroom.
323

Charge-Transfer Associated Photoluminescence Of Rare-Earths Doped Oxide Phosphors

Nag, Abanti 08 1900 (has links)
Luminescent materials can be found in a broad range of everyday applications. While in the seventies and eighties, the field of luminescent materials seemed to be fairly well covered, research in nineties has been revitalized both in industry and academia. Improvements over the last three decades have led to phosphor materials that operate close to their physical limits. It cannot be expected that properties such as quantum yield and spectral energy distribution will be significantly improved or that distinctly better materials will be found in the near future. Recently, there is a considerable research activity in the field of luminescent materials for lighting and displays to improve the chemical stability and to adopt the materials to the production technology. Ongoing miniaturization, lifetime improvement and spectral stability of fluorescent lamps on the one hand and brightness and contrast improvement in imaging systems on the other hand demand luminescent materials with very high stability that is invariable to operating conditions. All of the today's efficient lighting sources are based on either direct or indirect light emission from plasma discharges. During the pioneering stage, fluorescent lamp industries predominantly used mixtures of two photo luminescent materials: (Zn,Be)2SiO4.'Mn2+ having two emission maxima at 520 and 600 nm and MgW04 with 480 nm emission. The emission from these two phosphors covers the major portion of the visible spectrum. However, the compound (Zn,Be)2Si04 is hazardous to health because of its beryllium content. In 1942, Jenkins showed that Ca5(PO4)3(F,Cl):Sb,Mn was a very efficient emitter. The halophosphates emit both in the blue (Sb3+) as well as in the orange (Mn2+) spectral region, thus in addition yield white light. By carefully adjusting the ratio of Sb3+ and Mn2+ ion concentrations, a white light emitting phosphor was obtained with color temperatures ranging between 6500 and 2700K. However, the drawback of the halophosphate lamps is that it is impossible to have simultaneously high brightness and high color rendering; if the brightness is high (efficacy -80 lm W"1), the color rendering index (CRI) is of the order of 60, the CRI value can be improved up to 90, but then brightness decreases (-50 lm W"1). In 1974, another important breakthrough came in the form of compact fluorescent lamp, based on the trichromatic phosphor blend which resulted color rending values of 80-85 (color 80 lamps) at high efficiencies of 100 lm W"1. The fluorescent lamps with very high color rendering and efficiency can be obtained if three narrow band emitters with emission maxima at 450, 540 and 610 nm are employed. A typical trichromatic lamp phosphor blend comprises of (i) Sr5(PO4)3Cl:Eu2\ BaMgAl1()O,7:Eu2' as blue component, (ii) Ce0.67Tbo.33MgAl,,0,9, LaPO4,Le3\Tb3+ as green component and (iii)Y2C>3:Eiru as the red component. The color 80 lamps employ line emitters that generated light in discrete wavelength intervals. Colored objects that absorb outside these spectral regions appear with a slightly different body color when illuminated with these lamps rather than with a black body radiator such as the light bulb. For these purposes, color 90 or Deluxe lamps have been developed. The emission maximum of the blue phosphor can be shifted towards longer Wavelength by substituting BaMgAli0Oi7:Eu2+ with Sr4Ali4025:Eu2+. The red and green line emitters can be substituted by broad band emitters covering the whole spectral range. For this concept, (Ce,Gd,Tb)MgB5Oi0:Mn has been developed as a red emitter in which energy transfer from Ce3+ via Gd3+ to Mn2+ gives rise to an additional broad band at 630 nm. On the other hand, (Ba,Sr,Ca)2Si04:Eu has been developed as an alternative green-band emitter in which depending on the exact composition, the phosphor emits between 550 and 580 nm with a high quantum yield. Unfortunately, the host lattice is not stable in water, which prevents its deposition on the lamp bulb from aqueous suspensions and for environmental reasons more and more lamps producers use water as the suspending solvent in production instead of butyl acetate. Therefore, it is necessary to develop a new full color emitting phosphors, which has both thermal and chemical stability for application in luminescent lighting. The classical cathode ray tube (CRT) invented as the brown tube more than 100 years ago has developed into a remarkably mature product considering the complexity of its manufacturing process. Cathode rays are a beam of fast electrons, the accelerating voltage in a television picture tube is high (>10 kV). Basic requirements of display phosphors are stability (2000 hr operation) and emission color purity according to the standards set by the European Broadcasting Union (EBU). The blue and green phosphors are still the very cheep ZnS based materials, essentially the same ever since color-TV was introduced in fifties. On the other hand, (Zn,Cd)S, Ag+,C1" was originally used as the red phosphor however, the broad emission centered at 650 nm due to intrinsic donor-acceptor transition leads to rather low lumen equivalent as large fraction of the emission integral lies outside the eye sensitivity curve. For this and the environmental reasons, it has been replaced by the much more expensive Y2O2S:Eu with main emission lines at 612 and 628 nm. Recently, the big electronic companies are trying to enforce flat panel displays e.g. PDPs (plasma display panels) and FEDs (field emission displays). This is because of the fact that when compared to the CRT screen pigments, FED phosphors are required to operate at lower voltages and higher current densities. Although the voltages used in FEDs are only 0.1 to < 2 kV, the high-energy surface excitation on the phosphor particles causes degradation of sulfides, leaving the oxide hosts as the only favorable choice. The phosphor blends used are mixtures of SrTiO3:Pr3+ (red), Y2Si05:Tb (green) and Y2Si05:Ce (blue). However, the white light generation efficiency is very low (-5 lm W"1) and required improvement of phosphor efficacy because of its distinct advantages such as a very wide range of operational temperatures, stability under rugged conditions and wide viewing angle of emission. Similarly, in PDPs blue emitting BaMgAlioOniEu, green emitting Z^SiO^Mn and red emitting (Y,Gd)BO3:Eu are mostly used which shows a screen efficiency of about 1.5 lm W"1, just only half that of a CRT used in today's TV sets. However, the advantages of PDPs over CRTs are that it is not sensitive towards the display manufacturing process, which includes high temperature annealing up to about 600°C and it is stable under the harsh conditions of a Ne/Xe plasma used in PDPs (ion bombardment, VUV radiation). This puts pressure on the development of phosphor for maximum brightness and high stability to replace completely the classical CRTs. On the other hand, the invention of the blue-light emitting diode (LED) based on GaN can be regarded as a triumph of materials chemistry. In principle, it is possible to vary the emission wavelength of blue GaN-based LEDs between 370 nm (band-gap of pure GaN) and 470 nm by increasing the indium (In) content in InGaN devices. Assuming a conversion from the incident light by a phosphor material emitting at 555 nm, InGaN is coated with (Yi.xGdx)3(Ali-yGay)5Oi2:Ce (YAG:Ce) which has broad yellow band varying between 510 and 580 nm. This allows the adjustment of white color temperature from 8000 down to 3000 K. Recently, S^SiCU and S^SiOs have attracted current interest due to their potential applications in developing white light-emitting-diodes (LEDs) because GaN (400 nm chip)-coated with Sr2Si04:Eu2+ or Sr3SiC>5;Eu2+ exhibits better luminous efficiency than that of the industrially available product such as InGaN (460 nm chip)-coated with YAG:Ce. However, the major drawback of this combination is the strongly decreasing overall efficiency upon lowering the color temperature. This can be solved by using a phosphor material that has sufficient absorption at the emission wavelength of the blue diode, the quantum yield should be high under UV/Vis excitation and the FWHM of the emission band should be as small as possible in order to achieve high luminous output. The search for stable inorganic rare-earths phosphors with high absoiption in the near UV/blue spectral region is therefore an attractive research work. Since luminescence materials are a key component for lighting and display concept, research in the field of rare-earths doped oxide phosphors is carried out. Although state-of-the-art materials fulfill most requirements, improvements are still necessary to further boost the efficiency of the phosphor materials. Since it is not expected that materials will be found that perform better than the already established phosphor, the present work concentrates on the improvements of the phosphor by modifying the chemical and niicrostructurai features as well as the crystal structure. Chapter I gives a brief introduction to luminescence in solids, physical aspects and applications. Chapter II describes the synthesis and various experimental techniques employed in the investigation. Chapter III deals with photoluminescence and energy transfer involving charge transfer states in Sr2-xLnxCe04+x/2 (Ln = Eu and Sm) leading to an efficient full color emitting phosphor for luminescent lighting. Chapter IV and V describe charge transfer transition involving interface states associated with transitional nanophaseprecipitates leading to photoluminescence enhancement of SrTiO3:Pr3+,Al3+ and SrAli2Oi9:Pr3+,Ti4\ The light induced charge transfer leading to changing oxidation state of Eu in Sr2Si04 involving transient crystal structure results an efficient material for optical storage is presented in Chapter VI.Photoluminescence due to efficient energy transfer from Ce3+ to Tb3+ and Mn2t in SnAlioSi02o leading to an efficient phosphor for FEDs is presented in Chapter VII. Chapter VIII describes charge transfer transition involving trap states leading to long phosphorescence in SrAl2-xBxO4 (0<x<0.2) and Sr4Al14.xBxO25 (0.1<x<0.4) co-doped with Eu2+ and Dy3+. Chapter IX presents the role of particle size on the charge transfer associated luminescence of GdVO4:Ln3+ (Ln = Eu and Sm). A summary of the important findings and the conclusions arrived on the basis of results from these investigations are presented at the end of the thesis.
324

Qualitative and quantitative petrography of meta-mafic rocks at Ölme, in the Eastern Segment of the Sveconorwegian orogen

Carlsson, Diana January 2015 (has links)
Meta-mafic intrusions with an intrusion age of 1.6-0.9 Ga are found along a north-south trend in theTransitional section of the Eastern Segment in Sweden. These intrusions are garnet-bearing and thus anexception to other meta-mafic intrusions found in Sweden. Meta-mafic intrusions that are garnet-bearingare usually found in the Caledonides to the northeast and in the south west of Sweden where the pressureshave been naturally high due to orogenic events or subduction.The study was conducted on these intrusions around the community of Ölme, to understand themetamorphic and metasomatic history of the area. The focus lies on the transition from magmaticgabbroic intrusions to metamorphosed metagabbros and highly foliated garnet-amphibolites. AveragePT estimates was calculated using THERMOCALC and classical geothermobarometry, so that acomparison between the qualitative and quantitative data could be made.The study indicates metamorphism at amphibolite to upper amphibolite facies conditionsfor the metagabbros and the garnet-amphibolites.Average PT-estimates for the garnet-amphibolites gives metamorphic peak temperatures of 680°-730° Cwith pressures of 9.0-11.0 kbar at the Träfors locality, and metamorphic peak temperatures of 660°-770° Cwith pressures of 9.5-11.0 kbar at the Skråkvik locality. These results are comparable to research donefurther to the south on similar intrusions, with temperatures of 700° C and pressures of 10 kbar.It is concluded that the meta-mafic intrusions at the Skråkvik locality have been metamorphosed in adry system, in contrast to the Träfors locality which seems to have been affected by more pervasiveretrograde metamorphism and fluid-rock interaction. It is also concluded that mafic intrusionscan preserve their magmatic textures even under high pressure conditions.
325

Risk and the School-to-Work Transition in East Germany and the United States.

Barabasch, Antje 12 September 2006 (has links)
This study investigates how young adults in vocational education perceive risk in regard to their professional futures in East Germany and the United States. It analyzes students’ career aspirations and life plans in both countries and how they cope with uncertainties at the labor market. It further outlines underlying values, beliefs, and attitudes that guide young Americans and East Germans in their planning. Several theoretical frameworks ground this study and comprise the majority of the relevant literature. This cross-cultural comparative case study takes a mixed method approach using a concurrent triangulation design. The inquiry is framed by theories in the field of risk and cultural risk perception, school-to-work transition, vocational education and training, and welfare studies. In both countries, 129 students filled out a questionnaire. Additionally, narratives from nine focus groups and 29 biographical interviews were conducted. A three level analysis of the data was compiled that outlines the themes and categorizes them according to an individual, institutional, and macro-structural level of influence on risk perception in each country. Emerging premises on an individual level were choice, family and career planning concerns, geographical and occupational flexibility, further education and training, and agency. On the institutional level the influence of public career advisement institutions, teachers, parents, peers and friends was outlined. On the macro-structural level unemployment, political welfare reforms, the vocational education and training system were themes that have been of concern among the East German population. The dissertation also offers a comparative analysis of the data. This study reveals that young adults in East Germany are highly concerned about their occupational futures and tend to be pessimistic about current welfare reforms. They hold on to the idea of a standard biography and try to make strategic career plans. Their counterparts in the United States are highly optimistic about their futures, expressed little concern about labor market policies, but also appeared to be short term oriented in their life planning in order to remain flexible and mobile.
326

Truth Commissions: Did the South African Truth and Reconciliation Commission serve the purpose for which it was established?

Abduroaf, Muneer January 2010 (has links)
<p>Since the 1980&rsquo / s, many dictatorships around the world have been replaced by new democracies. These old dictatorships were notorious for their human rights abuses. Many people were killed and tortured / and many others were disappeared. When the new governments came into power, they had to confront these injustices that were perpetrated under the predecessor regime. This was necessary to create a culture of human rights / promote a respect for the law and access to justice. Many confronted these injustices in different ways, some granted amnesty, some prosecuted and others instituted truth commissions. This research paper focuses on truth commissions. The research focuses particularly on the study of the South African Truth Commission. The mandate of the South African Truth Commission is analysed and the investigation into whether the commission served the purpose for which it had been established is discussed.</p>
327

Bladder Tumor Recurrence after Primary Surgery for Transitional Cell Carcinoma of the Upper Urinary Tract

Oehlschläger, Sven, Baldauf, Anka, Wiessner, Diana, Gellrich, Jörg, Hakenberg, Oliver W., Wirth, Manfred P. 14 February 2014 (has links) (PDF)
Objective: Primary transitional cell carcinoma (TCC) of the upper urinary tract represents 6–8% of all TCC cases. Nephroureterectomy with removal of a bladder cuff is the treatment of choice. The rates of TCC recurrence in the bladder after primary upper urinary tract surgery described in the literature range between 12.5 and 37.5%. In a retrospective analysis we examined the occurrence of TCC after nephroureterectomy for upper tract TCC in patients without a previous history of bladder TCC at the time of surgery. Methods: Between 1990 and 2002, 29 patients underwent primary nephroureterectomy for upper tract TCC. The mean age of the patients was 69.5 years. In 5 cases upper urinary tract tumors were multilocular, in the remaining cases unilocular in the renal pelvis (n = 12) or the ureter (n = 12). The follow-up was available for 29 patients with a mean follow-up of 3.37 (0.1–11.2) years. Results: 11/29 (37.9%) patients had TCC recurrence with 9/11 patients having bladder TCC diagnosed within 2.5 years (0.9–6.0) after nephroureterectomy. 13/29 patients are alive without TCC recurrence, 3/29 patients died due to systemic TCC progression and 5/29 died of unrelated causes without evidence of TCC recurrence. Conclusion: Our data indicate a high incidence of bladder TCC after nephroureterectomy for primary upper tract TCC of up to 6 years after primary surgery. Because of the high incidence of bladder TCC within the first 3 years of surgery, careful follow-up is needed over at least this period. / Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.
328

The Cambodian Curse : A field study on the role of journalists in modern Cambodia

Bengtner, Therese January 2014 (has links)
The title enlightens the difficulties of democratic transition that Cambodia experiences post Khmer Rouge. Media in transitional democracies is often described as a forced compromise between what is ideal and what is actually possible. This thesis aims to understand how political agency and technological advances have affected journalistic agency in a transitional democracy. Three research questions were decided upon: How do journalists in Cambodia perceive their role in a democratic transition? What restrictions and limitations do journalistic practices face in Cambodia? And how do journalists in Cambodia perceive the impact of social media on democratic development? A field study was conducted in Phnom Penh, Cambodia. For ten weeks, eight editors and journalists currently active in Cambodia were interviewed and observed in their working environment. Normative media theory and developmental democracy theory have been used to analyze and understand the material that was generated through a combination of unstructured observations and semi-structured qualitative research interviews. Important findings were that the complicated structures of transitional democracies make journalists take on different roles, from very collaborative to extremely radical. Their different stand on journalistic practices is a mixture of their own choice and the force of historical, political and social constraints. Political power players treat them differently, which further separates them and has led to a segregated journalistic community. Even though they seem to share the same fundamental ideal of what journalism should be journalists are therefor unlikely to cooperate. Social media has been a catalyst for change in democratic development in Cambodia. By offering a place for uncensored conversations it has given the opposition access to media. Social media has brought along many new dilemmas though and is probably more beneficial to journalistic development than to democratic development. There is a lack of tolerance of diversity in Cambodia due to the fragile state of democratic transition. Therefor the immediate and unrestricted ways of expression in social media partially works against creating the social capital necessary for consolidation – fully completed democratization.
329

The technical expert assumes managerial responsibilities: an Interpretivist perspective on transition in Australia.

Bukarica, Marija, marijab@unimelb.edu.au January 2009 (has links)
In this study, Interpretivist epistemology and abductive research strategy were used to examine transcripts of sixteen two-hour focused interviews. The research sample was a group of technical experts who assumed managerial responsibilities within their organisations (transitional managers). The subjectively perceived experiences of the transition were examined as well as the respondents' intersubjective interpretations of the transition from the organisational perspective. The aim was to explore the perceived characteristics of the transitional experience. The main findings of this study could be summarised as follows: firstly, it was found that there were three main types of transitional managers: the unwilling, the pragmatic and the eager managers. Secondly, the key motivations to take the manager role for all three categories were higher remuneration, technical peer respect and the respondent's new role as an organisational decision-maker. The third finding of this study was that there were two types of transitions, the complete transition which the majority of the eager managers went through and the technical transition which was experienced by the unwilling and the pragmatic managers. Related to that finding was the link between the type of organisation, its culture and the leadership skills required in that organisation. The fourth finding was that, irrespective of the amount of time in the manager role (six months to eleven years) or the type of transition (complete or technical), all respondents in this study continued to identify themselves as technical experts with the respondents who underwent a complete transition also seeing themselves as managers. Related to this finding was the respondents' continued identification as technical experts being largely due to their need to identify with their peers (other technical experts). The fifth major finding of this study related to a lack of career planning by the respondents and little or no succession and management development planning by the respondents' organisations. In a contribution to the theory of leadership studies, this study examined leadership as a social process, building on the existing leadership concepts and theories and putting them in a social context of subjective efforts by the researcher to interpret the respondents' transitional experiences through typification of the leadership characteristics into seven themes. The need to apply an individual contextualisation was seen as essential to understanding the transitional managers' response to their own transition. In doing so, the study has contributed towards narrowing the existing empirical literature gap on the transition processes. The contributions of this study need to be seen in the context that explorative research such as the one carried out here is not considered generalisable, as its aim was to explore and describe particular phenomena. Nevertheless, insights from this study were eight
330

Exploring intimate partner violence through the lens of modern attachment theory a project based upon an independent investigation /

Smeltzer, Lisa Marie. January 2009 (has links)
Thesis (M.S.W.)--Smith College School for Social Work, Northampton, Mass., 2009. / Includes bibliographical references (p. 53-55).

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