Daily aerosol samples (PM) were collected at a rural station, which is 5 km away from the Turkish-Bulgarian border between April 2006 and March 2008. Aerosol samples were analyzed for elements by ICPMS, ions by IC and black carbon by aethalometer to provide a multi-species aerosol data set, which can represent aerosol population for Northwestern Turkey and Eastern Europe. Average concentration of SO42-, NO3- and NH4+ was 5.8, 2.9 and 2.0 &mu / g m-3, respectively, while total aerosol mass was 66 &mu / g m-3. Seasonal variation of crustal species had maxima in summer, while most of the anthropogenic species had maxima in winter. Rainfall was found as the only local meteorological parameter affecting aerosols concentrations. The dominant sectors of air masses arriving the Northwestern Turkey were northeast in summer and west-northwest in winter. Air masses were classified into five clusters regarding their wind speed and direction. Most species indicated significant differences between clusters. The influence of forest fires in Ukraine and Russian Federation was identified by cluster analysis using soluble K as tracer. Source apportionment of PM was carried out by EPA PMF model and five sources were resolved. Crustal emissions were found to be the major contributor to PM (41%). The second largest source was distant anthropogenic sources with a contribution of 26%. Traffic was also a remarkable source with 16% contribution. Sea salt and stationary combustion sources accounted for 9% and 8% of PM, respectively. Potential source regions of resolved sources were determined by potential source contribution function (PSCF).

Ce mémoire de thèse présente une étude fondamentale enrichie par des contributions qui sont articulées autour de la modélisation de processus ainsi qu'un diagnostic de défauts en utilisant l'analyse en composantes principales (ACP). <br /> Dans l'objectif d'un choix optimal du modèle ACP, une étude comparative de quelques critères connus dans la littérature nous a permis de conclure que le problème rencontré est souvent lié à une ignorance des variables indépendantes et quasi-indépendantes. Dans ce cadre, nous avons réalisé deux démonstrations mettant en évidence les limitations de deux critères en particulier la variance non reconstruite (VNR). En s'appuyant sur le principe d'une telle variance, nous avons proposé trois nouveaux critères. Parmi eux, deux ont été considérés comme étant empiriques car seule l'expérience permettra de prouver leur efficacité. Le troisième critère noté VNRVI représente un remède à la limitation du critère VNR. Une étude de sa consistance théorique a permis d'établir les conditions garantissant l'optimalité de son choix. Les résultats de simulation ont validé une telle théorie en prouvant ainsi que le critère VNRVI étant plus efficace que ceux étudiés dans cette thèse.<br /> Dans le cadre d'un diagnostic de défauts par ACP, l'approche de reconstruction des indices de détection ainsi que celle des contributions ont été utilisées. A travers une étude de généralisation, nous avons étendu le concept d'isolabilité de défauts par reconstruction à tout indice quadratique. Une telle généralisation nous a permis d'élaborer une analyse théorique d'isolabilité de défauts par reconstruction de la distance combinée versus celles des indices SPE et T2 de Hotelling en mettant en avant l'avantage de l'utilisation d'une telle distance. D'autre part, nous avons proposé une nouvelle méthode de contribution par décomposition partielle de l'indice SPE. Cette approche garantit un diagnostic correct de défauts simples ayant de grandes amplitudes. Nous avons également étendu une méthode de contribution classiquement connue par la RBC au cas multidimensionnel. Ainsi, la nouvelle forme garantit un diagnostic correct de défauts multiples de grandes amplitudes. En considérant la complexité de défauts, nous avons exploité la nouvelle approche de contribution RBC afin de proposer une nouvelle qui s'appelle RBCr. Cette dernière s'appuie sur un seuil de tolérance pour l'isolation de défauts. Une analyse de diagnosticabilité basée sur la RBCr montre que celle-ci garantit l'identification des défauts détectables. Ces derniers sont garantis isolables si leurs amplitudes satisfont les mêmes conditions d'isolabilité établies pour l'approche de reconstruction des indices.

This article experimentally examines voluntary contributions when group members' marginal returns to the public good vary. The experiment implements two marginal return types, low and high, and uses the information that members have about the heterogeneity to identify the applied contribution norm. We find that norms vary with the information environment. If agents are aware of the heterogeneity, contributions increase in general. However, high types contribute more than low types when contributions can be linked to the type of the donor but contribute less otherwise. Low types, on the other hand, contribute more than high types when group members are aware of the heterogeneity but contributions cannot be linked to types. Our results underline the importance of the information structure when persons with different abilities contribute to a joint project, as in the context of teamwork or charitable giving. (author's abstract) / Series: Department of Economics Working Paper Series

The ¡§Congestion Management¡¨ (CM) always has been an outstanding and major problem in power system operation. To solve this problem, experts compose solutions in a wide variety. This thesis, based on the equivalent current, applies the Equivalent Current Injection (ECI) concept and circuit parameters to derive the Power Flow Tracing Method (PFTM) . By means of this method we can get a Sensitive Matrix (SM), which is also called the Contribution Matrix (CM), to show the linear relationship between the input power and tidal current discharge of each generator set, with the linear relationship we can derive the mathematic model of treating the congestion problem discussed in this thesis. Combining the Predictor-Corrector Interior Point Algorithm (PCIPA), we can manipulate the change of each generator set in the prospective of solving the congestion problem resulting from the system contingency (SC). The thesis performed various simulations for the IEEE 30 Bus system. Regarding the power contingencies, the solutions of the power-congestion problems can be resulted from the following incidents: heavy load addition, transmission line tripped, generator malfunction as well as the multi-contingencies, etc., which can all be solved with solutions within reasonably restricted domains. We can thus verify the effectiveness of the method .

Thesis (Ph.D.)--Mississippi State University. Department of Finance and Economics. / Title from title screen. Includes bibliographical references.

The study was about employees’ perception of wellness in the workplace, where a company had to exemplify the workplace as an arena for health promotion. The study was conducted to provide more knowledge about how the wellness in the workplace can be developed to change exercise habits and increase physical activity. The aim of the study is to investigate how the wellness is carried out at a midsize company and also on this basis to analyze and propose actions in the purpose to activate all the employees in a workplace. The questions that were asked were how the wellness in the workplace is being used, the employees’ perception of wellness in their workplace, and how actions for wellness can be developed in purpose to increase employees’ physical activity. The methodology of the study was based on a qualitative methodology with semi-structured interviews on ten employees in various professional groups. The study concluded that three main obstacles to employees ‘participation in wellness programs, and physical exercise exist. These were time, motivation and work situation. The results also show that there are certain factors that can reduce these barriers.

No description available.

Chemical composition of particles and rain water at three sites in Turkey were extensively compared to determine if there is a relationship between aerosol and rain composition. If such relationship exists, it can allow one to construct rain water composition using aerosol data. This is important because, rain composition data is scarce as sampling and analysis of very low concentrations of elements and ions in rain water is more difficult compared to sampling and analysis of atmospheric aerosol. Results showed that aerosol composition can be closely reflected in composition of rain water if below cloud processes dominate over the incloud processes. This is clearly observed for crustal elements in all stations and for most of the elements in urban Ankara station. However, in rural stations there were differences in rain and aerosol that is attributed to significant contribution from in cloud processes. Seasonal patterns and enrichment factors observed in aerosol composition showed general agreement with corresponding temporal variations observed in rain water concentrations of elements, but short term variations became visible only if data is averaged over a long period of time. These observations suggest that certain features of rain water composition can be constructed from if concentration data is available for aerosols. However it should be noted that there are also significant differences between stations and between elements or element groups, indicating that composition of rain water constructed from aerosol data can only be a crude one. Similarities between rain and aerosol compositions is more pronounced in urban Ankara station compared to rural stations used in this study. Factor analysis performed to aerosol and rain water data sets showed that source types affecting chemical composition of rain and particles are generally the same, bur contribution of each source type to rain and aerosol composition shows differences. Similarly, the source regions, defined by potential source contribution function, affecting aerosol and rain compositions are not identical. In Antalya station Source regions affecting chemical composition of rain water are more local compared to source regions affecting composition of aerosol. Same difference is not observed in Amasra station. Scavenging ratios is found to be a suitable tool to construct rain water composition using aerosol data. Scavenging ratios calculated using paired daily data are more variable both between stations and within a station. Long-term averaged data was found to be more reliable for calculating SRs of elements and ions at all stations.

Este trabalho teve como objetivo discutir a temática do Custeio Variável aplicado a uma empresa prestadora de serviços, para demonstrar o uso da Margem de Contribuição como ferramenta de apoio à gestão da empresa. A pesquisa aqui relatada utilizou o método qualitativo como abordagem, realizada por meio de um estudo de caso descritivo utilizando como modelo a Análise da relação Custo x Volume x Lucro para empresas multiprodutoras. A fim de possibilitar a realização deste estudo de caso, foi realizada a revisão da literatura sobre o tema, de modo a fundamentar e estruturar as etapas de aplicação do modelo adotado no ambiente organizacional escolhido, analisando-se os serviços prestados pela empresa e identificando-se corretamente a Margem de Contribuição destes. Após esta etapa, foi possível analisar a participação de cada serviço na composição do mix de vendas da empresa e, dessa forma, avaliar a contribuição efetiva de cada um na geração da riqueza para a empresa. O modelo proposto envolve basicamente a identificação da Margem de Contribuição Unitária e sua correspondente Razão de Contribuição, além da identificação do Ponto de Equilíbrio de cada serviço, bem como da empresa como um todo. Esse estudo foi desenvolvido em uma instituição de ensino em fase de crescimento e devido aos desafios que se apresentam a uma empresa nessas condições, aumenta a relevância do mesmo, do ponto de vista do uso de ferramentas de gestão profissionais, que apesar de consagradas no mercado, nem sempre são utilizadas por uma grande parte das pequenas empresas. Ao final, é demonstrada a aplicação do modelo e destacada a sua relevância para a gestão da empresa, bem como, apresentadas as conclusões do estudo, evidenciando-se que por meio da utilização do modelo proposto, os objetivos específicos são atingidos e a indagação feita a cerca da problemática discutida é respondida por meio dos resultados obtidos no presente estudo. / This study aimed to discuss the theme of Variable Costing applied to a service provider, to demonstrate the use of the Contribution Margin as a management support tool company. The research reported here used the qualitative method as approach, performed through a descriptive case study using a model of Analysis of Cost x Volume x Profit respect to multiproducts companies. In order to enable the realization of this case study, the literature review on the subject was held in order to support and structure the application steps of the model adopted in the organizational environment chosen by analyzing the services provided by the company and the correct identification of the contribution margin of these. After this step, it was possible to analyze the participation of each service in the composition of the sales mix of the company and thus evaluate the actual contribution of each in the generation of wealth for the company. The proposed model basically involves identifying the unit contribution margin and it’s corresponding contribution ratio and the identification Breakeven Point each service as well as the company as a whole. This study was developed in an educational institution in the growth phase and due to the challenges that confront the company under these conditions, increases its relevance from the point of view of the use of management tools professionals who consecrated despite the market are not always used by a large proportion of small businesses. At the end, it is demonstrated the application of the model and highlighted its relevance to the company's management, as well as presented the study's findings, showing that by using the proposed model, the specific objectives are met and the question made about the discussed problem is answered by the results obtained in this study.

O objetivo deste trabalho é verificar o impacto na alteração do regime previdenciário de repartição para um modelo misto, através da criação do fundo complementar previdenciário para os novos servidores federais no Brasil. O estudo apresenta os diagnósticos e os conceitos e modelos de previdência adotados no Brasil e sintetiza as experiências de países latino-americanos que reformaram seus respectivos regimes previdenciários com a finalidade de reduzir o déficit com os inativos. No caso brasileiro, após a promulgação da Constituição Federal de 1988 foram editadas duas Emendas Constitucionais (a de nº 20 de 1998 e a de nº 41 de 2003) que possibilitaram a criação, em 2012, da entidade fechada de previdência complementar, para os novos servidores públicos federais, chamada FUNPRESP. O estudo conclui que com o surgimento deste fundo, será possível equalizar os valores dos benefícios pagos entre os regimes geral e próprio. Nesse sentido, o teto dos benefícios de aposentadorias pagos do regime próprio dos servidores federais estará indexado ao valor do teto do regime geral de previdência social. Assim, caso o servidor decida suplementar ganhos acima deste teto, para fins de aposentadoria, ele deverá aderir ao fundo e contribuir, sobre o salário participação, em uma conta individualizada. Desta forma, o governo buscou garantir equidade nos pagamentos de benefícios entre os regimes de previdência geral e próprio, além de tentar reduzir o déficit das contas públicas previdenciárias no longo prazo. / The objective of the present paper is to check the impact on changing from the actual social security of federal pensions to a mixed model, through a creation of a defined contribution pension plan for new federal public employees in Brazil. The study show off diagnostics and exhibit the concepts of pension models adopted in Brazil and brief international experiences of countries that have altered their social pension schemes in Latin America, with object to reduce government deficits of inactive. In the Brazilian case, after the Federal Constitution of 1988, Constitutional Amendments were enacted (nº 20 of 1998 and nº 41 of 2003) which enabled the creation, in 2012, of a complementary retirement plan for new federal public employees, called FUNPRESP. The study concludes than with the emergence of this fund, it will be possible to equalize the amounts of benefits paid between pension schemes. Thereby, the remuneration limit of the benefits paid to the actual system of federal employees pensions will be indexed to the remuneration limit of the general social security. Therefore, if the public employee decides complement gains above this compensation limit, for pension purposes, they should choose to contribute with a quota to an individualized pension plan. So, the government tried to ensure equity in benefit payments between the pension schemes, as well as tried to reduce the deficit of the social security public finances in the long term.