Thesis (M.Sc. Biological Sciences)--University of Waikato, 2008. / Title from PDF cover (viewed March 10, 2009) Includes bibliographical references (p. 62-72)

Thesis (M.P.A.)--Kutztown University of Pennsylvania, 1994. / Source: Masters Abstracts International, Volume: 45-06, page: 2960. Typescript. Includes bibliographical references (leaves 85-86).

Thesis (Ph. D.)--Civil and Environmental Engineering, Georgia Institute of Technology, 2006. / Mulholland, James, Committee Member ; Bergin, Michael, Committee Member ; Russell, Armistead, Committee Chair ; Wang, Yuhang, Committee Member ; Nenes, Athanasios, Committee Member. Vita.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1974. / Typescript. Vita. Description based on print version record. Includes bibliographical references (leaves 229-237).

Thesis (M.S.)--University of Wisconsin, 1973. / eContent provider-neutral record in process. Description based on print version record. Includes a bibliography.

Thesis (M.S.)--University of Delaware, 2006. / Principal faculty advisor: William J. Ullman, Dept. of Marine and Earth Studies. Includes bibliographical references.

Thesis (Ph. D.)--Florida State University, 2006. / Advisor: Chuck Zhang, Florida State University, College of Engineering, Dept. of Industrial and Manufacturing Engineering. Title and description from dissertation home page (viewed Sept. 22, 2006). Document formatted into pages; contains xiii, 152 pages. Includes bibliographical references.

I takt med att dagens samhälle ställer högre krav på störningsfri elleverans samt en vilja till att ständigt förbättra elkvaliteten. Detta ger elkvalitet och elkvalitetsmätningar en större betydelse för både elleverantörerna och deras kunder.Som ett led i att säkerställa en god elkvalitet behövs speciella instrument som mäter och analyserar de parametrar som orsakar en försämrad elkvalitet. Dagens problematik är att många moderna utrustningar påverkar elkvaliteten negativt samtidigt som andra moderna installerade utrustningar är mera störningskänsliga. Genom att installera ett heltäckande elkvalitetssystem för mätning av elkvalitet kan problem upptäckas innan dessa ger upphov till driftstörningar eller skador på ansluten utrustning. Idag mäts framförallt elkvalitet på elleverantörernas 10, 40 och 130 kV nät. Ambitionen är att få bättre övervakning på lågspänningsnäten 0,4 kV.I detta arbete visas ett förslag på hur ett integrerat elkvalitetssystem bestående av både elnätsanalysatorer och energimätare utrustade med en elkvalitetsmodul kan utformas. Med ett integrerat system fås en överblick enklare fram ifall någon av lågspänningskunderna bidragit till en försämrad elkvalitet. / Today's society places a greater demands on interference-free electric distribution and a desire for a constant efficiency on power quality. Power quality and power quality measurements are continually becoming a more important issue to both the electricity suppliers and their customers.As a part of ensuring good power there's a requirement for special instruments that measure and analyses the parameters that is the cause of deterioration of power quality. Today's problem is that many modern devices has a negative effect on power quality while other modern devices are more sensitive to disturbance. By installing a comprehensive power quality system for measurement of power quality, some problems can be detected before they give rise to malfunction or damaging any of the connected equipment. As today, measurements on power quality are mainly focus on the suppliers' 10, 40 and 130 kV grid, with the ambition of creating a better surveillance on the low voltage grid, 0.4 kV.In this report a proposal of how an integrated power quality system consisting both of power quality analyzers and energy meters equipped with a power quality module could be designed. With an integrated system there will be easier to detect of someone of the low voltage costumers contributes to a deterioration of power quality.

Master of Science / Department of Agricultural Economics / Mykel R. Taylor / The average land price in Kansas has recently been through a period of large growth and decay, nearly doubling from 2010 to its peak in 2014, but falling from 2014 to 2017 in both real and nominal terms. However, there is anecdotal evidence that not all land prices are dropping at the same rate. Lower quality land prices seem to be dropping at a higher rate than the higher quality land prices. The goal of this analysis is to give analytical evidence to support the belief of different rates of price changes for different qualities of land. The hypothesis is that once the farm economy entered its period of negative growth, the producers that over-leveraged themselves needed to sell some of their assets to correct their balance sheets and that low quality land is the primary asset liquidated. The producers that did not over-leverage themselves would still be looking to purchase the right piece of land. This creates a surplus of less preferred low quality land on the market, while the supply and demand for the high quality land stays strong. This analysis was completed using 56,291 observations on land sales from 33 years starting at the beginning of 1985 and continuing on through the middle of 2017. A real price per acre for the land weighted by the number of acres in each parcel was calculated for each quarter, as well as a variable with the price of land lagged one quarter. Data on real net farm income, the S&P 500, and 30-year fixed-rate mortgage interest rates were also collected and used to create averages for each of the 131 quarters analyzed in this work. Finally, a variable representing the percent of all sales in each quarter in the bottom 25 percent in quality of all land sales was created. Quarterly dummy variables were included to control for seasonality. Two regressions were run with the only difference being the exclusion of the variable representing the bottom quality sales in the first in order to compare the results. Analysis of the first regression shows positive relationships between the dependent variable of the logged real price per acre and the independent variables of the logged lagged real price per acre, real net farm income, the S&P 500, and land sold during the third quarter of the year compared to the first quarter. There is a negative relationship suggested between the logged land price and the 30-year fixed-rate mortgage interest rate. Inclusion of the variable representing sales of land in the bottom quartile of quality suggest results consistent with the first regression, with some of the variables becoming more statistically significant. More importantly, this analysis shows a negative relationship between average land price and the variable representing land quality. This shows that the average land price is affected by the quality of the land sold at a statistically significant level.

Made available in DSpace on 2014-06-12T15:49:12Z (GMT). No. of bitstreams: 1 license.txt: 1748 bytes, checksum: 8a4605be74aa9ea9d79846c1fba20a33 (MD5) Previous issue date: 2008 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / Qualidade da Informação (QI) tem se tornado um aspecto crítico nas organizações e em pesquisas da área de sistemas de informação. Informações de pouca qualidade podem ter impactos negativos na efetividade de uma organização. O crescimento do uso de data warehouses e acesso direto de gerentes e usários a informações obtidas de várias fontes contribuíram para o crescimento da necessidade de qualidade nas informações das empresas. A noção de QI em sistemas de informação emergiu nos últimos e vem sendo alvo de interesse cada vez maior. Não existe ainda um acordo comum acerca de uma definição da QI. Apenas um consenso de que tratase de um conceito de adequação ao uso . A informação é considerada apropriada para o uso dentro da perspectiva dos requisitos e necessidades de um usuário, ou seja, a qualidade da informação depende de sua utilidade. O acesso integrado a informações distribuídas em múltiplas fontes de dados heterogêneas, distribuídas e autônomas é um problema importante a ser resolvido em muitos domínios de aplicações. Tipicamente existem algumas formas de se obter respostas a consultas globais, sobre dados em fontes diferentes com diferentes combinações. entretanto é bastante custoso obter todas as respostas possíveis. Enquanto muita pesquisa tem sido feita em relação a processamento de consultas e seleção de planos com critérios de custo, pouco se conhece com relação ao problema de incorporar aspectos de QI em esquemas globais de sistemas de integração de dados. Neste trabalho, nós propomos a análise da QI em um sistema de integração de dados, mais especificamente a qualidade dos esquemas do sistema. O nosso principal objetivo é melhorar a qualidade da execução das consultas. Nossa proposta baseiasse na hipótese de que uma alternativa de otimizar o processamento de consultas seria a construção de esquemas com altos escores de QI. Assim, o foco deste trabalho está no desenvolvimento de mecanismos de análise da QI voltados esquemas de integração de dados, especialmente o esquema global. Inicialmente, nós construímos uma lista de critérios de QI e relacionamos estes critérios com os elementos existentes em sistemas de integração de dados. Em seguida, direcionamos o foco para o esquema integrado e especificamos formalmente critérios de qualidade de esquemas minimalidade, completude do esquema e consistência de tipo. Também especificamos um algoritmo de execução de ajustes de forma a melhorar a minimalidade e algoritmos para medir a consistência de tipo nos esquemas. Com esses experimentos conseguimos mostrar que o tempo de execução de uma consulta em um sistema de integração de dados pode diminuir se esta consulta for submetida a um esquema com escores altos de minimalidade e consistência de tipo