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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.
201

Sistemas fotovoltaicos e a experiência do Programa Luz para Todos em São Paulo / Photovoltaic systems and the experience of Light for All Program in the State of São Paulo.

Tina Bimestre Selles Ribeiro 18 February 2016 (has links)
Esta tese tem como objetivo analisar as políticas públicas de universalização do atendimento de eletricidade, por meio de sistemas fotovoltaicos, em algumas comunidades isoladas e propor procedimentos de aprimoramento. A pesquisa de campo foi baseada em dados qualitativos através de estudo de caso. O trabalho deu-se em três comunidades tradicionais de Ilhabela-SP, onde cem domicílios receberam sistemas capazes de fornecer 30 kWh mensais - SIGFI 30 -, em 2012. cujo financiamento foi pelo Programa Luz para Todos. Foram identificados aspectos facilitadores e barreiras para a adoção dos sistemas fotovoltaicos nessas comunidades. São apresentadas proposições para aprimoramento. O trabalho conclui que nas comunidades de Ilhabela não foi ainda garantida a consecução plena dos objetivos da política pública de poder suprir as necessidades básicas de iluminação, comunicação e refrigeração, notadamente, porque não havia geladeiras; os sistemas fotovoltaicos e a luz elétrica foram muito bem recebidos e foi constatada melhoria da qualidade de vida. / This thesis aims at analyzing public policy of electricity service universalization, by means of photovoltaic systems, in some isolated communities, as well as suggesting improvement procedures. The field research was based on qualitative data collected through case study. The work was performed in three traditional communities in Ilhabela-SP, where a hundred of households received systems capable of supplying monthly 30 kWh SIGFI 30 -, in 2012 which was financed by Light for All Program. Facilitator aspects and barriers for the adoption of the photovoltaic systems in these communities were identified. Suggestions for improvement have been presented. As a result, it is possible to conclude that a plain achievement of the public policy aimed at supplying the basic needs for illumination, communication and refrigeration in those Ilhabela communities, hasnt yet been guaranteed due to the absence of refrigerator. Photovoltaic systems and electricity were well accepted ant it was observed an improvement of quality of life.
202

Centerpartiet : Från Bondeförbund till Catch-all-parti?

Kylefors, Matilda January 2019 (has links)
No description available.
203

The role of social and human capital in assessing firm value : a longitudinal study of UK firms

Gundogdu, Didem January 2017 (has links)
This study examines the role of board social and human capital in assessing the market value of firms in the UK context. As the world economy has shifted from manufacturing to service and knowledge-based economies, attributes such as knowledge, expertise, skills, ability and reputation are increasingly fundamental to the success of business enterprises. There is a growing consensus that these attributes are an increasingly valuable form of capital, asset or resource, despite their intangibility. In accounting, there are a number of problems arising from the accountability of non-physical, non-financial capital. Firstly, some forms of capital and certain assets are neither recognised nor presented in the statement of financial position. Secondly, some accounting practices relating to intangible assets are very conservative, resulting in undervalued assets and overstated liabilities. Consequently, there is an increasing gap between the book value and market value of firms. This gap restricts the relevance of information presented in financial statements and suggests that there is something missing in financial statements. This is the research problem being addressed in this study. While prior literature demonstrates that it has proven difficult to operationalise intangible forms of capital, there has been significant empirical attention and theoretical development in social and human forms. This thesis aims to contribute to accounting theory and practice by exploring the impact that board social and human capital have on firm market value. In light of extant research, it is hypothesised that social and human capital possessed at board level are positively related to the market value of firms. This study employs the Ohlson’s (1995) residual income valuation model to test the impact of social and human capital using a sample of UK firms listed on the FTSE All Share index for a period of 10 years (2001-2010). Social and human capital measures are derived from interlocking directorate ties and detailed biographic information of board directors. This study benefits from Pajek and Ucinet network packages to generate network maps and calculate positional metrics such as centrality and structural hole measures.
204

The Relationships of Physiological and Strength Variables to Run Performances

Hollins, Jana 01 August 2015 (has links)
Monitoring progress of athletes is an essential component of the training process. Collegiate distance running coaches often use field tests to assess progress because of a lack of time and resources to do laboratory testing. The purpose of this dissertation was to examine the relationships between physiological and strength variables measured in a laboratory and field testing measures in collegiate distance runners. Collegiate distance runners completed a series of tests in the Sport Science laboratory at East Tennessee State University to obtain physiological and strength parameters, such as V̇ O2max and vertical jump height. The athletes then completed one of two field tests (either a 3 km time trial or a 3 minute all out run test). There were strong correlations between the laboratory measures and the field test performances. These results indicate that strength is an important factor in run performance. Also, a 3 km time trial and a 3 minute all out run test are suitable for athlete monitoring.
205

Anti-cancer immunotherapy using an adenovirus vaccine in combination with retinoic acid-loaded nanoparticles

de Barros, Cristina Maria 01 August 2019 (has links)
Cancer immunotherapy is an approach to cancer therapy that involves the enhancement of the cancer patient’s own innate and/or adaptive immune systems to attack their own cancer. Clinically available cancer immunotherapies rely on different strategies: infusion of ex vivo manipulated autologous dendritic cells (DCs), infusion of genetically engineered autologous cytotoxic CD8+ T lymphocytes, stimulation of T lymphocyte proliferation, or inhibition of immunosuppressive pathways to improve T lymphocyte effector function. Nonetheless, only a small percentage of cancer patients receive benefit from immunotherapies and thus further improvements in clinical outcomes are required. Among numerous other therapeutic immunotherapies strategies being developed and tested, adenovirus serotype 5-based vectors (Ad5) have been well studied in preclinical and clinical settings. Preclinical research has shown that vaccination of mice with Ad5-OVA (an Ad5 encoding a model tumor antigen, chicken ovalbumin (OVA)) results in activation and proliferation of OVA-specific CD8+ T lymphocytes capable of specific killing of tumor cells that express OVA. This dissertation evaluates the potential of polymeric nanoparticles (NP) loaded with all-trans retinoic acid (ATRA), a vitamin A derivative with potent immunostimulatory effects, to improve the immunostimulatory and therapeutic effects of Ad5-OVA in a murine E.G7-OVA tumor model, a well described model that can be used for studying the immune response to Ad5-based immunotherapies. In the first part of this work, poly(lactide-co-glycolide) NP loaded with ATRA (ATRA-PLGA-NP) were prepared and characterized. Next, the antitumor effect and the magnitude of the OVA-specific immune response due to Ad5-OVA vaccination versus ATRA-PLGA-NP (or ATRA soluble) plus Ad5-OVA combination treatment were compared in vivo. The results showed that the combination treatment using ATRA-NP, but not ATRA soluble, resulted in enhanced survival and enhanced levels of OVA-specific CD8+ T lymphocytes in peripheral blood, spleen, and tumor. Next, cRGD- and mannose-functionalized PLGA-PEG NP were developed in an attempt to actively target the tumor neovasculature and DC-rich organs, respectively. The functionalization efficacy was confirmed by ex vivo fluorescence imaging studies. In vivo studies using E.G7-OVA-challenged mice showed that treatment with ATRA-loaded cRGD-functionalized PLGA-PEG-NP + Ad5-OVA, despite not enhancing the levels of OVA-CD8+ T lymphocytes in peripheral blood, substantially enhanced survival compared to either the combination of Ad5-OVA + non-functionalized ATRA-PLGA-PEG-NP or Ad5-OVA + conventional ATRA-PLGA-NP. On the contrary, treatment with mannose-functionalized PLGA-PEG-NP + Ad5-OVA, despite optimally enhancing the levels of OVA-CD8+ T lymphocytes in peripheral blood (compared to all other treatment groups), did not lead to enhanced survival compared to either the combination of Ad5-OVA + non-functionalized ATRA-PLGA-PEG-NP, Ad5-OVA + conventional ATRA-PLGA-NP, and over Ad5-OVA treatment alone. Although not investigated further in this dissertation, it was speculated that the observed trend in survival benefit provided by ATRA-PLGA-PEG-cRGD-NP + Ad5-OVA over the other NP formulations may have been due to higher levels of ATRA within the TME due to actively targeting the tumor vasculature, corroborating previous studies which demonstrated that ATRA functions as a potent stimulator of anti-tumor cellular immune responses within the tumor. The paradoxical results obtained with mannose-functionalized PLGA-PEG-NP are less readily explained. In conclusion, it was demonstrated in this work that the co-administration of Ad5-OVA and ATRA-loaded NP formulations enhanced the tumor specific cellular immune response and the survival of tumor challenged mice compared to vaccination with Ad5-OVA alone.
206

Emergency Managers' Perceptions of All-Hazards Pandemic Planning Effectiveness in North Texas

Goss, Timothy 01 January 2017 (has links)
All-hazards pandemic planning is the foundation of current emergency management planning doctrine, yet there is limited information and limited studies related to its effectiveness in mitigating pandemics. The North Texas emergency management community handles incidents of West Nile Virus, H1N1 influenza, and a recent Ebola incident. Despite efforts to mitigate these threats, reported cases and deaths are still occurring from both influenza and West Nile virus. The purpose of this case study was to assess the risk perceptions of emergency planners in a small emergency operation center in North Texas using the cultural theory of risk perception as the theoretical framework. The raw data for this study originated from qualitative semi structured interviews with five emergency managers. By way of qualitative hand coding and thematic extraction, four primary themes emerged from the data: (a) political/organizational climate, (b) emergency response, (c) training and experience, and (d) communication. Additionally, all themes yielded relevant subthemes. The all-hazards approach to pandemic planning was effective as long as planners swiftly adjusted or adapted their plan for individual emergency events. The emergency management community still struggles with ineffective communication, negative political influences, poor coordination, and training shortfalls. Lack of trust in the levels of government emerged as a potential underlying cause to many of the issues. These findings may promote positive social change by assisting emergency management planners in assessing communications, coordination, training, appropriate use of personnel, and to identify areas where lack of trust between community partners may be affecting the overall response effort.
207

Nonlinear optics in Bragg-spaced quantum wells

Johnston, Wesley James 01 January 2010 (has links)
Bragg spaced quantum wells represent a unique class of resonant photonic materials, wherein a photonic bandgap is created by the periodic spacing of quantum wells and the associated variation in the complex susceptibility (index and absorption) of the material. Interest in BSQWs has grown in the past decade due to their large ultrafast nonlinearities and the corresponding large ultrafast reflectivity changes and transmissivity. These nonlinearities are of particular interest in areas of communication technology, where ultrafast all-optical logic components have become increasingly in demand. This research will further investigate BSQWs and the for the first time effects of spin-dependent nonlinear excitation on their photonic band structures. It will also investigate how these effects can be used in all-optical polarization switching and tunable optical buffer (slow light) applications.
208

Multi-stage contests : theory and experiments

Gelder, Alan Bruce 01 July 2014 (has links)
In a multi-stage contest known as a two-player race, players display two fundamental behaviors: (1) The laggard will make a last stand in order to avoid the cost of losing; and (2) the player who is ahead will defend his lead if it is threatened. Last stand behavior, in particular, contrasts with previous research where the underdog simply gives up. The distinctive results are achieved by introducing losing penalties and discounting into the racing environment. This framework permits the momentum effect, typically ascribed to the winner of early stages, to be more thoroughly examined. I study the likelihood that the underdog will catch up. I find that neck-and-neck races are common when the losing penalty is large relative to the winning prize, while landslide victories occur when the prize is relatively large. Closed-form solutions are given for the case where players have a common winning prize and losing penalty. Chapter 2 then experimentally examines the prediction of last stand behavior in a multi-battle contest with a winning prize and losing penalty, as well as the contrasting prediction of surrendering in the corresponding contest with no penalty. We find varied evidence in support of these hypotheses in the aggregated data, but more conclusive evidence when scrutinizing individual player behavior. Players tend to adopt one of several strategies. We develop a taxonomy to classify player types and study how the different strategies interact. The last stand and surrendering behaviors have implications for winning margins and the likelihood of an upset, which we investigate. Behaviorally, players are typically more aggressive when they reach a state in the contest by winning rather than by losing. The third and final chapter is a distinct departure from the study of multi-battle contests. Using comprehensive census data for Cornwall County, England, I create a panel dataset that spans six censuses (1841--1891)—possibly the largest panel dataset for Victorian England at present. I present the methodology for linking individuals and families across these censuses. This methodology incorporates recent advances in census linking (including the use of machine learning) and introduces new methods for tracking migration and changes in household composition. I achieve a forward matching rate of 43%. The additional inclusion of marriage and death records could allow for well over 60% of the population to be accounted for from one census to the next. Using this new panel, I investigate the frequency with which sons pursue the same occupations that they observed their fathers doing while growing up. For sons that did not follow in their father's footsteps, I identify some correlates that may have contributed to the change.
209

Acceptability and Proximate Composition of Meat-Vegetable Sticks Versus All-Meat Sticks Adjusted to pH 4.6 or 5.2 with Citric or Lactic Acids

Quinton, Ronnald Dean 01 May 1996 (has links)
A new innovative product, stewsticks, made with beef, pork, spices, and dehydrated vegetables, was developed as a nutritious snack. Lactic or citric acid was added at pH 5.2 or 4.6 to both meatsticks and stewsticks. Meatsticks and stewsticks were prepared by mixing ingredients until a cohesive mass was obtained. This mixture was then extruded into sticks that were cooked to about 50% of original weight. Sticks were then cut to desired length, packaged, and stored. Then meatsticks (beef, pork, and spices) were compared to stewsticks for appearance, texture, flavor, and overall acceptability. The stewsticks had excellent shelf life due to combined hurdles of pH 5.2, water activity of 0.95 or less, salt, and vacuum packaging. Compared to meatsticks, one serving (2 ounces) of stewsticks had less fat (9 vs 11 g respectively), less cholesterol (75 vs 90 mg) and more dietary fiber (4 vs 2 g), carbohydrates (20 vs 4 g), vitamin A (11 vs 2% RDA), and vitamin c {32 vs 1% RDA). The type of acid did not affect panel preference, but the samples at pH 5.2 were preferred over samples at pH 4.6. overall, meatsticks were preferred by the consumer panel over stewsticks although there were 25% of them who rated stewsticks as moderately acceptable or higher.
210

開票一路領先的對射證明 / A bijective proof of leading all the way

韓淑惠, Han, Shu-Hui Unknown Date (has links)
本文所討論的是開票一路領先問題。假設有A、B兩位候選人,開票結果A得m票、B得n票,開票過程中A的票數一路領先B的票數,我們將開票過程建立在平面的方格上,由(0,0)開始,A得1票記錄成向量(1,0),B得1票記錄成向量(0,1),分解成路徑後,A一路領先的開票方法數,就是對角線下的全部路徑數。但是算式及轉換步驟有點複雜,所以我們希望能建構一種簡單的模型對應來解決這個問題。 本文找出A至少一路領先m票的方法數,會對應到m×n的全部路徑走法,最後證明這樣的對應是一對一且映成,並猜想若有多位候選人,其中一人一路領先其他候選人的開票過程,也會有相似的對應方法。 / Suppose A and B are candidates for all election. A receives m votes and B receives n votes. If A stays ahead of B as the ballots are counted, we can think of a ballot permutation as a lattice path starting at (0,0), where votes for A are expressed as east (1,0) and votes for B are expressed as north (0,1). How to calculate the number of paths that A is always in the lead? We just count these paths from (0,0) to (m,n) that are under or touch the diagonal. However, the formula of combinatorial mathematics is not easy to obtain. So we hope to construct a model to resolve this problem. In this paper, we establish a one-to-one correspondence. The ways of A to receive at least m votes are always ahead the same as counting paths from (0,0) to (m,n). Finally, we find a bijective proof in the ballot problem. If there are many candidates, it will be a similar correspondence of one candidate leading the others.

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