Diss. Linköping : Linköpings universitet, 2006.

Thesis (doctoral)--Rijksuniversiteit te Utrecht.

No description available.

Master of Agribusiness / Department of Agricultural Economics / Elizabeth Yeager / Crossbreeding has long been promoted as the preferred method of production for cow-calf producers. Unfortunately, crossbreeding can add complexity to maintain a consistent cowherd and can drive the need to purchase replacement females from outside the producer’s own herd. This has led some producers to pursue straightbreeding to provide their own supply of replacements and the opportunity to more narrowly select for individuals suited to a carcass quality grid marketing system. The subject of this thesis is a Red Angus based cowherd that breeds females to Red Angus sires in early parities. The same cowherd is bred to Simmental sires in later parities to produce a terminal F1 cross. It is the objective of this thesis to explore whether this operation’s straghtbred or crossbred calf crop provides an economic advantage to the other treatment. Mortality data were collected during pre-weaning for both steers and heifers. Mortality data were collected for steers during backgrounding and feedlot phases. Wean weights and feed conversion performance during the backgrounding phase was unavailable for use in this study. Feedlot and carcass data were captured for steers from both treatments. The straightbred treatment showed an advantage in carcass quality. The composite treatment showed a slight advantage in mortality cost during pre-weaning and feedlot phase, and a slight advantage in feed conversion and cost per pound of gain while in the feedlot. The composite treatment showed a significant disadvantage during the backgrounding phase. The primary advantage for the composite treatment was the difference in actual wean weights. This difference in wean weight carried over to a higher start weight during the feedlot phase. This was the driving factor in providing the composite group the economic advantage in this study and making it the more attractive production option.

Rotavirus diarrhea causes a disproportionate amount of the world's childhood mortality. Approximately 611,000 children die each year due to complications of rotavirus infections. In this study we evaluate rotavirus vaccination using four different methods. We look at the epidemiological history of the disease and vaccination against the disease, then we evaluate the effectiveness of vaccination first using a cost-benefit analysis, then using an ordinary differential equations based model, and last through computer simulations in Matlab. We do a traditional cost-benefit analysis as suggested by the Public Health Service of the United States to evaluate the costs and benefits of implementing a rotavirus vaccination program in Egypt with the RotaRix vaccine. Our results show that given the current standards of care in Egypt, it would be more cost-beneficial for Egypt not to use the rotavirus vaccine. We formulate a model of the spread of rotavirus diarrhea based on a continuous time ordinary differential equations model of two viral strains of influenza. We expand this influenza model to include the case of co-infection. We further expand the original model to explore the effects of vaccination. We used computer simulations to further analyze the effect of vaccination as a control method. These simulations show that the spread of the disease is highly sensitive to the levels of cross-immunity between the strains, and the level of vaccination in the population. We found that the dynamics observed in the new model are similar to the dynamics observed in the original model. We found the minimum levels of vaccination necessary in this model to eradicate severe rotavirus disease and minimum levels of cross-immunity between the strains

Investment in electricity is a key element of the development process. Its importance is reflected in the growing recognition, since the 1960's, that investing in electricity provides and enhances knowledge, attitude and motivation necessary for economic and social development. The development and utilization of electricity create an economic atmosphere that has direct and indirect benefit for the economy. The direct impact is felt by most households who are able to affect households tasks more rapidly than before and save much time and effort in the process. Electricity also has an indirect impact on development. It improves the quality of life of the community by raising their income. The results of the survey at Katlehong confirms that the availability of electricity as a basic need appears to be far from satisfactory. Areas without electricity experience major social and economic costs as a result of dependency on costly and inconvenient energy sources. / Dissertation (MCom)--University of Pretoria, 1993. / Economics / unrestricted

Reducing inefficiencies without compromising quality is a major challenge facing college and university leaders. Measuring efficiency and quality is often addressed through various statistical analyses (Archibald and Feldman, 2008; Flegg, Allen, and Thurlow, 2004). Researchers have also applied cost benefit analysis to measure efficiency. Collaboration is one mechanism used by university personnel to enhance efficiency and quality (Wiley, 2008). The literature on collaboration includes collaboration in research (Rigby and Elder, 2005), teaching (Kezar, 2005; Letterman and Dugan, 2004), and cross-divisional collaboration, learning communities (O'Connor and Associates, 2003). Residential colleges (where faculty live and work in residence halls) are another form of collaboration emerging across college campuses. A thorough review of the literature reveals no studies exploring the costs and benefits of residential colleges. The purpose of this study was to understand and describe the costs and benefits of residential colleges. The theoretical framework for this study was based on Nas' (1996) cost benefit analysis framework. Data were collected through 60-90 minute telephone interviews with live-in faculty leaders of residential colleges and chief housing officers on campuses that offer residential colleges. Participants came from 11 different campus and included 12 chief housing officers and 11 faculty members. There are substantial institutional and individual costs associated with starting and maintaining a residential college. Institutional costs include departmental financial implications for facility renovations, staffing, and faculty incentives. Faculty principals and students bear individual costs. Impact on research, intensive time requirements for the position, and lack of recognition are costs affecting faculty. Residential college (RC) students incur additional fees and non-RC students are impacted by a diminished residential experience (as compared to their RC peers). Conversely, there are significant benefits resulting from residential colleges that may mitigate these costs. Institutions benefit from improved faculty pedagogy, expanded learning opportunities for students, and increased faculty connection to the institution. Individual benefits include positive faculty and student relationships (for faculty and students), increased understanding of students (for faculty), and faculty housing and other related incentives. / Ph. D.

Reducing inefficiencies without compromising quality is a major challenge facing college and university leaders. Measuring efficiency and quality is often addressed through various statistical analyses (Archibald & Feldman, 2008; Flegg, Allen, & Thurlow, 2004). Researchers have also applied cost benefit analysis to measure efficiency. Collaboration is one mechanism used by university personnel to enhance efficiency and quality (Wiley, 2008). The literature on collaboration includes collaboration in research (Rigby & Elder, 2005), teaching (Kezar, 2005; Letterman & Dugan, 2004), and cross-divisional collaboration, learning communities (O’Connor & Associates, 2003). Residential colleges (where faculty live and work in residence halls) are another form of collaboration emerging across college campuses. A thorough review of the literature reveals no studies exploring the costs and benefits of residential colleges. The purpose of this study was to understand and describe the costs and benefits of residential colleges. The theoretical framework for this study was based on Nas’ (1996) cost benefit analysis framework. Data were collected through 60-90 minute telephone interviews with live-in faculty leaders of residential colleges and chief housing officers on campuses that offer residential colleges. Participants came from 11 different campus and included 12 chief housing officers and 11 faculty members. There are substantial institutional and individual costs associated with starting and maintaining a residential college. Institutional costs include departmental financial implications for facility renovations, staffing, and faculty incentives. Faculty principals and students bear individual costs. Impact on research, intensive time requirements for the position, and lack of recognition are costs affecting faculty. Residential college (RC) students incur additional fees and non-RC students are impacted by a diminished residential experience (as compared to their RC peers). Conversely, there are significant benefits resulting from residential colleges that may mitigate these costs. Institutions benefit from improved faculty pedagogy, expanded learning opportunities for students, and increased faculty connection to the institution. Individual benefits include positive faculty and student relationships (for faculty and students), increased understanding of students (for faculty), and faculty housing and other related incentives. / Ph. D.

Each year approximately 7,500 low-income Virginia families are enrolled in the Expanded Food and Nutrition Education Program (EFNEP), administered through the Virginia Cooperative Extension (VCE). Chronic disease and health conditions cost society an estimated $250 billion each year in medical charges and lost productivity. It has been assumed that the numerous diet and food-related changes made by EFNEP participants will lead to a reduction in the risk of chronic disease among homemakers, and perhaps, other family members. Thus, the improved diets and behaviors resulting from EFNEP participation may result in substantial future savings in healthcare costs among participants. This study explores the possibility of potential economic benefits for the Virginia EFNEP participants. In 1996, the Virginia Cooperative Extension was awarded a grant from the Cooperative State, Research, Education, and Extension Service, United States Department of Agriculture (CSREES, USDA) to conduct a cost-benefit study of EFNEP in Virginia. Though computation of the cost-benefit ratio for the Virginia adult EFNEP includes both direct and indirect benefits, this study addressed only the assessment of the direct tangible benefits based on the savings from economic costs of avoided diseases. Existing EFNEP data for the 1996 fiscal year was used to identify optimal nutritional behaviors that can delay or prevent the onset of certain chronic diseases and health conditions. The economic costs of diseases were identified from scientific literature and translated as potential benefits. The administration costs of EFNEP were also compiled. The total direct tangible benefit for the diseases and conditions identified was estimated to be $17,770,722. Along with the indirect tangible benefits ($321,462), the total tangible benefits for the Virginia EFNEP was calculated to be $18,092,184. The direct tangible costs associated with the Virginia EFNEP in 1996 was $1,922,204. The benefit-cost ratio for the Virginia EFNEP for the 1996 fiscal year for the subset of the population practicing the optimal nutritional behaviors is calculated at $9.41/$1.00 (a $9.41 return for every $1 invested in EFNEP in Virginia). Also, a benefit of $2.45 to $1.00 was calculated when only 25% of those participants practicing optimal nutritional behaviors were assumed retain these behaviors through life. For a program of the magnitude of EFNEP, these results are very gratifying. / Ph. D.

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