Obesity has been on the rise for several decades in both children and adults. Furthermore, obesity is associated with diseases. Children's environment is suspected to affect children's eating habits and lack of exercise, but the salient aspects of children's environments are still not well understood. The present research addresses the possibility that work to family spillover may disrupt family eating patterns and children's physical activity sufficient enough to cause weight gain. Other researchers have examined the environment of the family in terms of parenting style and family rituals. This literature however has not examined the possible moderating effect of parenting styles on the effects of work to family spillover on children's obesity. The study included a cross-sectional sample of children and adolescents (n = 312) in a Houston study. Participants included both parents (if a father was present in the household) and one child aged either 9-11 or 13-15. Bivariate, multivariate, and logistic regression analyses were performed. Work to family spillover, family meal rituals and parenting styles were found to have a relationship with children obesity measures for both age groups. However, these relationships are less strong when combined into a full model. Only a mothers' work strain was associated with increased odds of having overweight children in the 9-11 age group. Although the relationship between mothers? work strain and mothers' controlling parenting style and obesity-related variables remained significant, there was no evidence that a maternal or paternal parenting style moderates the relationship between work spillover and children obesity measures. Father dinner ritual importance was associated with lower odds of having overweight children among 13-15 year old adolescents. However, findings did not support hypothesis that family meal ritual variables children eating while watching TV, mother eating while watching TV nor Father dinner ritual (all significant in the full model) moderated the positive relationship between mothers work strain and overweight, at-risk for overweight, or healthy weight children for neither age group.

This dissertation focuses on the spatial aspects of oil and natural gas production to investigate the extent and effects of inefficient and unnecessary spatial competition. Because oil and natural gas are migratory, operators can cause hydrocarbon resources to flow from a neighboring property onto his or her own through rapid extraction. This problem is compounded when productive leases are comparatively small, as is the case in Texas. Following an introduction and literature review, the third chapter takes advantage of a natural experiment to demonstrate how spillovers in production limit total cumulative recovery, and how the assignment of secure property rights can enhance economic outcomes. The chapter examines production from wells in Oklahoma and Texas near the panhandle border. While wells on either side of this line have similar geologies and so should be similarly productive they are exposed to different treatments: Oklahoma has a much higher rate of unitization (a contractual scheme where competing owners hire a common operator and share profits), whereas the unitization rate in Texas is lower. Using regression discontinuity design, I find that Oklahoma wells are produced more slowly early on, and that this results in greater cumulative recovery over the course of a well’s life (150% more relative to Texas). These results are robust after controlling for reservoir specific effects, and across parametric, semi-parametric and nonparametric specifications. xiiThe fourth chapter quantifies the degree to which competing owners interfere with each other’s production through spatial spillovers. I use a spatial econometric model that controls for spatial autocorrelation and spatial dependence and can therefore identify the spillovers in production. Additionally, by comparing leases owned by competing producers to leases owned by a common producer, I show empirically how securing property rights through common ownership can alleviate the externality in production. A priori, one would expect that when a common producer owns adjacent leases, the producer has the incentive to fully account for how spillovers in production affect neighboring wells. Conversely, when adjacent landowners are in competition to extract the resource, they will not account for the damage rapid production causes at neighboring wells. After controlling for secondary injection I find that this is indeed the case for Slaughter field of West Texas. The fifth chapter investigates the statistical properties of oil and natural gas production. I find striking evidence that both oil and natural gas production are power-law distributed with the exponent approximately equal to one. This distribution might arise from disequilibrium in production and exploration. Highlighting this distribution is important because it has potential consequences for the political economy of regulation as well as for resource management. For example, because the most productive wells lie in the far-right tail of the distribution, regulation geared to prevent a Deepwater Horizon scale spill need fall on a vanishingly small percent of wells. The distribution also has consequences for management because a company profitability depends disproportionately on how it manages its most productive wells. The sixth chapter provides a short conclusion.

This dissertation focuses on the spatial aspects of oil and natural gas production to investigate the extent and effects of inefficient and unnecessary spatial competition. Because oil and natural gas are migratory, operators can cause hydrocarbon resources to flow from a neighboring property onto his or her own through rapid extraction. This problem is compounded when productive leases are comparatively small, as is the case in Texas. Following an introduction and literature review, the third chapter takes advantage of a natural experiment to demonstrate how spillovers in production limit total cumulative recovery, and how the assignment of secure property rights can enhance economic outcomes. The chapter examines production from wells in Oklahoma and Texas near the panhandle border. While wells on either side of this line have similar geologies and so should be similarly productive they are exposed to different treatments: Oklahoma has a much higher rate of unitization (a contractual scheme where competing owners hire a common operator and share profits), whereas the unitization rate in Texas is lower. Using regression discontinuity design, I find that Oklahoma wells are produced more slowly early on, and that this results in greater cumulative recovery over the course of a well’s life (150% more relative to Texas). These results are robust after controlling for reservoir specific effects, and across parametric, semi-parametric and nonparametric specifications. xiiThe fourth chapter quantifies the degree to which competing owners interfere with each other’s production through spatial spillovers. I use a spatial econometric model that controls for spatial autocorrelation and spatial dependence and can therefore identify the spillovers in production. Additionally, by comparing leases owned by competing producers to leases owned by a common producer, I show empirically how securing property rights through common ownership can alleviate the externality in production. A priori, one would expect that when a common producer owns adjacent leases, the producer has the incentive to fully account for how spillovers in production affect neighboring wells. Conversely, when adjacent landowners are in competition to extract the resource, they will not account for the damage rapid production causes at neighboring wells. After controlling for secondary injection I find that this is indeed the case for Slaughter field of West Texas. The fifth chapter investigates the statistical properties of oil and natural gas production. I find striking evidence that both oil and natural gas production are power-law distributed with the exponent approximately equal to one. This distribution might arise from disequilibrium in production and exploration. Highlighting this distribution is important because it has potential consequences for the political economy of regulation as well as for resource management. For example, because the most productive wells lie in the far-right tail of the distribution, regulation geared to prevent a Deepwater Horizon scale spill need fall on a vanishingly small percent of wells. The distribution also has consequences for management because a company profitability depends disproportionately on how it manages its most productive wells. The sixth chapter provides a short conclusion.

Negativöverspridning från arbetsliv till privatliv och från privatliv till arbetslivuppkommer när beteenden, humör, stress eller känslor från den ena sfären på ettnegativt sätt påverkar den andra sfären. Denna uppsats har en kvalitativ ansatsoch undersökte lärares upplevelse av negativ överspridning mellan arbetsliv ochprivatliv och tvärtom. Respondenterna var 16 lärare inom grundskola ochgymnasieskola som förde dagbok kring negativ överspridning. De typer av negativöverspridning som nämndes oftast var 1) hög arbetsbelastning, 2) tankar ellerkänslor som stör, 3) trötthet, 4) problem med andra människor samt 5) problemmed maskiner. Resultatet visade att respondenterna rapporterade mer negativöverspridning mellan arbetsliv och privatliv än tvärtom. Respondenterna uppgavatt de arbetade mycket och att förtroendetiden oftast inte räckte till. Deflesta lärare som avböjde medverkan i studien gjorde detta på grund av överbelastningi arbetssituationen. / Negative spillover from work to family and vice versa often occurs when forinstance behaviour, mood, stress and feelings from one domain negatively affectthe other domain. This qualitative thesis investigated teachers perceptions ofnegative spillover from work to family and vice versa. The respondents were 16teachers in primary and secondary school which wrote a diary about negativespillover. The types of negative spillover that occured most frequently were 1)high workload, 2) disturbing thoughts or feelings, 3) fatigue, 4) problems withother human beings and 5) problems with machines. The results showed that therespondents reported more negative spillover from work to family, than fromfamily to work. Most of the respondents worked a lot and the time of trust werenot enough. The respondents who declined participation in the study did thisbecause of an overload in their work situation.

In this study, we used the Density functional theory (DFT) and Molecular dynamics (MD) to obtain the suitable hydrogen storage of platinum nanoclusters on the (5,5) and (9,0) carbon nanotubes (CNTs) and Li atoms on the (5,5) carbon nanotube. platinum nanoclusters on the CNT is chemisorption because hydrogen molecules dissociated. Li atoms on the CNT is physisorption due to hydrogen molecule do not dissociated. We hope that two different hydrogen storage models can achieve the goal which was set by Department of Energy US. There are three parts in this study. There were three parts in this study: The first part: It is very important for obtaining the suitable potential parameters in the Molecular dynamics simulation to reflect the interaction between materials. However, we can not find the suitable parameters from the references to simulate our system. Hence, we use the Force-matching method and Density functional theory to obtain the potential parameter in our system. The Molecular dynamics simulation is utilized to simulate the hydrogen adsorption qith the modified potential parameters. The second part: The dynamics behavior of different platinum nanopartilces on the (5, 5) and (9, 0) CNTs at different temperature are investigated by the Molecular dynamics simulation when new parameters are obtained. The migration trajectory, square displacement and mean square displacement of the mass center of platinum nanoclusters are used to analyze to find what sizes of platinum nanoparticle and temperature are the best for hydorgen storage. The third part: Density functional theory simulation is utilized to simulate hydrogen molecules adsorbed on the (5, 5) pristine CNT and CNT with lithium atoms. The pressure and temperature effects are used to analyze the hydrogen storage system. Moreover, the different arrangements of CNTs array are also studied, such as, Van der Waals distance (VDW) and shape of array (triangular and square arrangement). Finally, the adsorbed and released phenomenon are also analyzed by the gravimetric capacity (wt%) of hydrogen molecule for hydrogen.

With regard to government-owned firm privatization and technology spillovers effect, many papers had investigated before. But the combination of two type of topics, mixed oligopoly and R&D spillover effects ,is unusual. This paper will show how technology spillovers effects markets including both private and public firms. We apply the model of D¡¦Aspremont and Jacquemin (1998) and reassign the objective function of White (1996). In this paper, we present two main results. First, when the commodity is easily replicated due to spillover effect, its production cost must lower. The existence of government-owned firms can higher social welfare and market output. Therefore, government intervention can correct market failure. Second, That government subsidize research cost to public firms can encourage firms to proceed to research and develop. But subsidy cause social welfare reduction under no spillover effect situation. On the contrary, subsidy to public firms higher social welfare in spillover effect situation.

Univ., Diss.--Lund.

Ample research has investigated the relationship between non-work and work domains finding consistent links between stressors in one and strains in the other. Additionally, there exist explanatory models of these associations such as psychological/physical sickness and related absences and loss or fear of losing personal resources. The current investigation combined variables from the spillover model and Affective Events Theory to test a new model with negative mood at its core. It hypothesized marital and financial stressors lead to negative mood at home which spills over into the work domain resulting in relatively more negative appraisals of work events. Negative mood at work is a likely outcome, which in turn causes subsequent decreases in organizational citizenship behavior (OCB) and job satisfaction and increases in counterproductive work behavior (CWB). Finally, the model proposed social support as a moderator buffering against the detriments of negative mood from home. Although structural equation modeling found the proposed model to be incorrect and to suffer from a large degree of misfit, examination of individual parameter estimates warranted the testing of two alternative models. Model 3 presented the best fit and most variance accounted for by omitting OCB and using direct paths from social support to all work variables (rather than the proposed moderating effect) and direct carryover of mood at home to mood at work. The majority of the paths tested in the model reasonably explained the data, although some variance remained unaccounted for. Results of model testing were also supported by significant correlations in the predicted direction between stressors and mood at home; mood at home and appraisals of work events; appraisals of work events and mood at work; and mood at work with job satisfaction and CWB. These results draw attention to the important role played by the individual's mood in the interplay between the work and non-work domains.

In this thesis I study the investment climate in the four rapidly growing emerging economies Brazil, Russia, India and China (BRIC). The first study, Chapter 2, uses a bivariate EGARCH methodology with time varying conditional correlation to study the global and regional integration of the BRICs and to identify the existence of diversification opportunities for international investors. The second study, Chapter 3, employs a restricted version of the model to explore the relationship between equity market returns and volatility of equity returns in the BRIC countries and global oil prices. Chapter 4 is an extension of Chapter 3, and focuses on the sustainability of Russia???s economic growth in view of its large dependence on oil income. A qualitative analysis of the oil industry in Russia, including an overview of the operations of the largest oil producing companies, government regulations, oil production and proven oil reserves, is conducted for the purpose of this study. The last study, Chapter 5, uses a panel data methodology to explore the determinants of changes in sovereign bond spreads for the BRICs as an asset class and for each of the BRIC countries individually. I conclude that the regional and global level of integration of the BRICs is relatively low, and portfolio investors can enjoy sound diversification benefits particularly by taking investment positions in the Indian and Chinese equity markets. Despite the aggressive economic growth of the BRICs and their increased oil consumption, the volatility of stock returns from the BRICs does not have a significant impact on global oil prices; however, oil prices do impact the volatility of equity returns in India and China, and particularly the level of returns and volatility of equity returns in Russia. Based on this and the qualitative analysis in Chapter 4, it is concluded that in the short to medium term Russia???s continued economic growth will depend on increased reinvestment in the oil industry and in the longer term the government should diversify its revenue sources and focus on development of other sectors within the economy. Lastly, it is concluded that sovereign risk in the BRICs is driven by different global and country-specific factors, hence risk should be observed on an individual country basis and not for the BRICs as an asset class.

Univ., Diss.--Karlsruhe, 2006.