This master thesis investigates if there is an induction motor configuration that can be used with a flywheel energy storage system, that uses passve superconducting magnetic bearings (SMBs). The configurations should be able to be designed with induction motor building blocks that are commercially available. The method used to investigate this was simulations of different induction motor configurations in the finite element analysis software COMSOL. The simulations show that when larger air-gaps than that of a commercial IM unit are used it is possible to use SMBs in the IM. SMBs have the advantage of having zero resistance which makes it possible to store energy without resistance losses. However it was found that by using and IM with SMBs the generated power would be lower than that of a commercial unit.

No description available.

国立情報学研究所で電子化したコンテンツを使用している。

国立情報学研究所で電子化したコンテンツを使用している。 / 国立情報学研究所で電子化したコンテンツを使用している。

Thesis (Ph. D.)--University of Hawaii at Manoa, 1991. / Includes bibliographical references (leaves 177-207) / Microfiche. / xiii, 207 leaves, bound ill. 29 cm

Gentrifiering pågår idag ständigt i vårt samhälle. Det är en social förändringsprocess som består i att människor med hög socioekonomisk status flyttar till områden som traditionellt sett har dominerats av människor ur lägre sociala klasser och från etniska minoriteter. Den här studien undersöker teorier och bakomliggande faktorer till varför människor väljer att gentrifiera och vilka likheter det finns mellan dem som väljer att gentrifiera. Genom en litteraturstudie visar pekar undersökningen på tidigare forskning och för en diskussion om ämnet. Resultat av den här studien visar att anledningarna till varför människor gentrifierar idag ser väldigt olika ut, man har alltså inte kommit fram till vad den gemensamma nämnaren som får gentrifierarare att gentrifiera är. Vad man har ringat in är vad som sker, vilka det drabbar och vilka som har bra förutsättningar att bli gentrifierare. Studien visar också att man måste sätta in gentrifiering i ett större samhällsperpektiv i vidare forskning för att finna nya svar och att inte bara studera den gentrifierande sidan, de som flyttar in i dessa områden. / Gentrification is something that is constantly going on in our society. It is a social change that consists of people with high socioeconomic status that are moving to areas which traditionally have been dominated by people from lower social classes and ethnic minorities. This is a study which examines theories and underlying factors of why people choose to gentrify and what similarities exist between them. Through a literature study I examine previous research and I undertake a discussion of the topic. The results of this study show that the reasons why people gentrify today are very different, they have not figured out what the common denominator is which make gentrifiers gentrify. What it has identified is what happens, what it affects and which individuals has good potential to become gentrifiers. The study also shows the need to deploy gentrification in a broader societal point of view in further research to find new answers and to think not only of the gentrifiers, those who move into these areas.

This thesis explores several aspects of the labour market in Serbia and Croatia during the process of transition from socialism to a market economy. First, it examines how women??s position in the labour market has changed in Serbia. Using five annual Labour Force Surveys (2001-2005), I find that the gender wage gap is still very low in Serbia, and is even decreasing during this period. However, decompositions that apply the Oaxaca (1974) methodology reveal that the unexplained component of the gap is very large, and is increasing. Likewise, quantile decompositions suggest that while the raw gap is falling at each of the quantiles analysed, the unexplained component is increasing at most quantiles at the same time. Thus, the relatively small gap in earnings could be masking considerable discrimination in the labour market. Second, changes in men??s wage inequality in Serbia in the period from 2001 to 2005 are analysed using five annual Labour Force Surveys. Changes in the distribution of earnings are examined using the Lemieux (2002) decomposition methodology. I find that the change in wage inequality is mostly driven by changes in wage premiums, while the effect of changes in the composition of the labour force is very small. Isolating the effect of the emerging private sector reveals that changes in the private sector size and wage premium account for an average 25 percent of the changes in inequality during this period. Third, the effect that the recent war in Croatia (1991-1995) had on the educational and employment trajectories of the 1971 birth cohort of men is investigated. This birth cohort was most affected by the armed forces draft. I treat the occurrence of the war as a natural experiment and use data from the Croatian and Slovenian Labour Force Surveys. Applying the difference-in-difference framework and comparing this cohort to adjacent cohorts, women, and to respective cohorts in Slovenia, a neighbouring country that did not experience war, I find that the war has had a negative effect on educational outcomes and a small positive effect on the employment and earnings outcomes of this cohort of men.

This thesis explores several aspects of the labour market in Serbia and Croatia during the process of transition from socialism to a market economy. First, it examines how women??s position in the labour market has changed in Serbia. Using five annual Labour Force Surveys (2001-2005), I find that the gender wage gap is still very low in Serbia, and is even decreasing during this period. However, decompositions that apply the Oaxaca (1974) methodology reveal that the unexplained component of the gap is very large, and is increasing. Likewise, quantile decompositions suggest that while the raw gap is falling at each of the quantiles analysed, the unexplained component is increasing at most quantiles at the same time. Thus, the relatively small gap in earnings could be masking considerable discrimination in the labour market. Second, changes in men??s wage inequality in Serbia in the period from 2001 to 2005 are analysed using five annual Labour Force Surveys. Changes in the distribution of earnings are examined using the Lemieux (2002) decomposition methodology. I find that the change in wage inequality is mostly driven by changes in wage premiums, while the effect of changes in the composition of the labour force is very small. Isolating the effect of the emerging private sector reveals that changes in the private sector size and wage premium account for an average 25 percent of the changes in inequality during this period. Third, the effect that the recent war in Croatia (1991-1995) had on the educational and employment trajectories of the 1971 birth cohort of men is investigated. This birth cohort was most affected by the armed forces draft. I treat the occurrence of the war as a natural experiment and use data from the Croatian and Slovenian Labour Force Surveys. Applying the difference-in-difference framework and comparing this cohort to adjacent cohorts, women, and to respective cohorts in Slovenia, a neighbouring country that did not experience war, I find that the war has had a negative effect on educational outcomes and a small positive effect on the employment and earnings outcomes of this cohort of men.

Empirical studies have shown that white racial attitudes tend to predict racial policy support. It has also been established that the relationship between whites' espoused racial tolerance and their support for ameliorative racial policies is imperfect, due to the principal-policy gap which characterized misalignment between individuals' espoused values for racial equity and their limited support for policies aimed at achieving those ends. Less consideration however, has been given to how the principal-policy gap changes over time. Using data from over 14,000 respondents who participated in the General Social Survey from 1994 through 2018, I show that the principal-policy gap is persistent, and that distances between principal and policy decline and expand over time. Using OLS regression models to analyze a sample of white adults, I find that the link between individuals' expressed liberal racial attitudes and their support for racial policies changed over the 24-year span. A noticeable narrowing of the principal-policy gap is also evident in the latter years of the sample. The reduction in the gap from 2014 through 2018 suggests that the influence of social movements like BLM may have been driving this trend.

Thesis(M.S.)--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references.