A Research Report submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, in partial fulfilment of the requirements for the degree of Master of Science. Johannesburg, 2016 / Maintenance of technical systems aims at retaining their reliability and availability, restoring their capability of continuing their operation in case they have failed. A number of reliability and maintenance policies that play a significant role in reducing system failures and in making cost-effective decisions on whether to repair or replace a system will be examined in great detail. This research report places greater emphasis on the total repair cost (TRC) limit policy and compares it with other polices like the economic lifetime (EL) policy. The maintenance cost rate will be used to obtain the optimal parameters. When a system fails, it is replaced with an identical unused one if the total repair cost goes beyond a pre-determined repair cost limit by a preventive replacement if in the time period (0, v) no failure forces a replacement of the system. Else, a repair is carried out. / M T 2016

A erosão acelerada do solo constitui um processo importante de degradação dos solos e da água e no entanto as consequências econômicas dessas perdas são ainda pouco conhecidas. Este estudo objetivou analisar o emprego de um SIG na estimativa do valor monetário da perda de solo nas áreas de produção de cana-de-açúcar e pastagem na Microbacia Hidrográfica do Ceveiro (MHC). Para a realização da modelagem da erosão laminar foi utilizado a Equação Universal de Perdas de Solo (USLE) e para a estimativa do custo o método Custo de Reposição dos Nutrientes (CRN). A estimativa de perda de solo por erosão da MHC mostrou que 38,5% da área da microbacia apresenta perda de solo entre 0 e 10 Mg.ha-1.ano-1; 20% na classe de 20 e 50 Mg.ha-1.ano-1; 25% na classe de 50 e 100 Mg.ha-1.ano-1. Em 91% das áreas de cana-de-açúcar a perda de solo estimada é maior que a perda tolerável. O CRN estimado médio para as áreas de cana-de-açúcar foi R$ 285,64 .ha-1.ano-1 e de e R$27,21 .ha-1.ano-1 para as áreas de pastagem. Quando analisadas separadamente a cultura da cana-de-açúcar e a pastagem, o valor médio do CRN é de R$ 285,64. ha-1.ano-1 e R$ 27,21. ha-1.ano-1 respectivamente. Além disso, para ambas as culturas o nitrogênio é o nutriente com maior participação na composição do CRN estimado e efetivo, sendo responsável por aproximadamente 82% para as áreas de cana-de-açúcar. A aplicação do Custo de Reposição de Nutrientes por Sistema de Informação Geográfica forneceu indicadores que permitem a análise comparativa quanto ao custo de reposição de nutrientes perdidos por erosão. / Accelerated soil erosion is an important process of land and water degradation; however the economics consequences of these losses are still little known. This pourpose of this study was to analyze the use of a GIS to estimate the monetary value in the areas of sugarcane and pasture cultivation in the Ceveiro Watershed. Average annual soil loss rates had been estimated using the Universal Soil Loss Equation (USLE), and the monetary costs had been estimated using the Replacement Cost of Nutrients Method. The estimated soil loss by erosion of MHC showed that 38.5 % of the area of the watershed presents soil loss between 0 and 10 Mg ha - 1.year - 1; 20 % in the class of 20 and 50 Mg ha - 1.year - 1 ; 25 % in class 50 and 100 Mg. ha -1.year -1. In 91% of the areas of sugarcane the soil loss estimated is greater than the tolerable loss. The CRN estimated average for the areas of sugarcane was R$ 285.64 year - 1 .ha - 1 and R$ 27.21 year -1 ha - 1 for pasture areas. When analyzed separately, the culture of sugarcane and pasture, the average value of the RCN is R$ 285.64. ha -1 year-1 and R$ 27.21 . ha -1 .year-1 respectively. Moreover, for both crops nitrogen is the nutrient with the highest participation in the composition of Estimate and Effective RCN, accounting for approximately 82 % to the areas of sugarcane. The application of the method of economic valuation of natural resources for Replacement Cost provides indicators that allow comparative analysis regarding the cost of replacing nutrients lost through erosion.

A erosão acelerada do solo constitui um processo importante de degradação dos solos e da água e no entanto as consequências econômicas dessas perdas são ainda pouco conhecidas. Este estudo objetivou analisar o emprego de um SIG na estimativa do valor monetário da perda de solo nas áreas de produção de cana-de-açúcar e pastagem na Microbacia Hidrográfica do Ceveiro (MHC). Para a realização da modelagem da erosão laminar foi utilizado a Equação Universal de Perdas de Solo (USLE) e para a estimativa do custo o método Custo de Reposição dos Nutrientes (CRN). A estimativa de perda de solo por erosão da MHC mostrou que 38,5% da área da microbacia apresenta perda de solo entre 0 e 10 Mg.ha-1.ano-1; 20% na classe de 20 e 50 Mg.ha-1.ano-1; 25% na classe de 50 e 100 Mg.ha-1.ano-1. Em 91% das áreas de cana-de-açúcar a perda de solo estimada é maior que a perda tolerável. O CRN estimado médio para as áreas de cana-de-açúcar foi R$ 285,64 .ha-1.ano-1 e de e R$27,21 .ha-1.ano-1 para as áreas de pastagem. Quando analisadas separadamente a cultura da cana-de-açúcar e a pastagem, o valor médio do CRN é de R$ 285,64. ha-1.ano-1 e R$ 27,21. ha-1.ano-1 respectivamente. Além disso, para ambas as culturas o nitrogênio é o nutriente com maior participação na composição do CRN estimado e efetivo, sendo responsável por aproximadamente 82% para as áreas de cana-de-açúcar. A aplicação do Custo de Reposição de Nutrientes por Sistema de Informação Geográfica forneceu indicadores que permitem a análise comparativa quanto ao custo de reposição de nutrientes perdidos por erosão. / Accelerated soil erosion is an important process of land and water degradation; however the economics consequences of these losses are still little known. This pourpose of this study was to analyze the use of a GIS to estimate the monetary value in the areas of sugarcane and pasture cultivation in the Ceveiro Watershed. Average annual soil loss rates had been estimated using the Universal Soil Loss Equation (USLE), and the monetary costs had been estimated using the Replacement Cost of Nutrients Method. The estimated soil loss by erosion of MHC showed that 38.5 % of the area of the watershed presents soil loss between 0 and 10 Mg ha - 1.year - 1; 20 % in the class of 20 and 50 Mg ha - 1.year - 1 ; 25 % in class 50 and 100 Mg. ha -1.year -1. In 91% of the areas of sugarcane the soil loss estimated is greater than the tolerable loss. The CRN estimated average for the areas of sugarcane was R$ 285.64 year - 1 .ha - 1 and R$ 27.21 year -1 ha - 1 for pasture areas. When analyzed separately, the culture of sugarcane and pasture, the average value of the RCN is R$ 285.64. ha -1 year-1 and R$ 27.21 . ha -1 .year-1 respectively. Moreover, for both crops nitrogen is the nutrient with the highest participation in the composition of Estimate and Effective RCN, accounting for approximately 82 % to the areas of sugarcane. The application of the method of economic valuation of natural resources for Replacement Cost provides indicators that allow comparative analysis regarding the cost of replacing nutrients lost through erosion.

The objective of this thesis is to establish the utility and limitations of using exergy (a thermodynamic measure of energy quality, or ability to perform work) as a resource consumption metric, and to investigate what role exergy may play in resource consumption decision-making. To do so, this thesis assessed three exergy-based resource consumption methodologies: the Exergy Replacement Cost; Eco-exergy; and Emergy. Furthermore, fundamental properties of exergy were revisited, including the exergy reference state, and the derivations of both concentration and non-flow exergy. The results of the analysis indicate three significant problem areas with applying exergy toward resource valuation. First, the exergy derivation level conflicts with the resource valuation level regarding important requirements and assumptions: the exergy reference environment is modelled as an infinitely large system in internal chemical equilibrium, and this is in incomparable to the real world; and, the derivation of non-flow exergy values items based solely upon chemical concentrations, whereas at the resource consumption level, work producing items are valuable based primarily upon chemical reactivity. Second, exergy proponents have not adequately addressed the many different and critical perspectives of exergy, including exergy as: harmful or helpful; organizing or disorganizing; a restricted or unrestricted measure of potential useful work; and applied to value systems or specific items. Third, none of the resource consumption methodologies properly apply exergy: the Exergy Replacement Cost primarily focuses on mineral upgrading; Eco-exergy is improperly derived from exergy; and Emergy has switched from being energy-based to exergy-based without any reformulation of the methodology. For the reasons provided above, among others, this author concludes there is currently no justified theoretical connection between exergy and resource value, and that there is a disjunction between how exergy is derived and how it is applied. Non exergy-based applications for the three resource consumption methodologies are proposed.

The objective of this thesis is to establish the utility and limitations of using exergy (a thermodynamic measure of energy quality, or ability to perform work) as a resource consumption metric, and to investigate what role exergy may play in resource consumption decision-making. To do so, this thesis assessed three exergy-based resource consumption methodologies: the Exergy Replacement Cost; Eco-exergy; and Emergy. Furthermore, fundamental properties of exergy were revisited, including the exergy reference state, and the derivations of both concentration and non-flow exergy. The results of the analysis indicate three significant problem areas with applying exergy toward resource valuation. First, the exergy derivation level conflicts with the resource valuation level regarding important requirements and assumptions: the exergy reference environment is modelled as an infinitely large system in internal chemical equilibrium, and this is in incomparable to the real world; and, the derivation of non-flow exergy values items based solely upon chemical concentrations, whereas at the resource consumption level, work producing items are valuable based primarily upon chemical reactivity. Second, exergy proponents have not adequately addressed the many different and critical perspectives of exergy, including exergy as: harmful or helpful; organizing or disorganizing; a restricted or unrestricted measure of potential useful work; and applied to value systems or specific items. Third, none of the resource consumption methodologies properly apply exergy: the Exergy Replacement Cost primarily focuses on mineral upgrading; Eco-exergy is improperly derived from exergy; and Emergy has switched from being energy-based to exergy-based without any reformulation of the methodology. For the reasons provided above, among others, this author concludes there is currently no justified theoretical connection between exergy and resource value, and that there is a disjunction between how exergy is derived and how it is applied. Non exergy-based applications for the three resource consumption methodologies are proposed.

The aim of this thesis is to evaluate two localities with different intensity of agricultural use in terms of ecosystem services provided by nature habitats. In connection with the evaluation of the sites is in the works documented incidence size seminatural habitats, natural calculated value of the studied area using Biotope Vaulation Method (Seják et al., 2003) Application MapoMat developed by the Agency for Nature Conservation and Landscape. The value of ecosystem services is determined through expert analysis by replacement cost. There were differences in the value of ecosystem services important habitats between conventional and organic farming at localities 1 and 4. Natural habitat value conventionally used the site has a 2.53 milKč compared to the organic farming locality where the value was estimated at 194.6 milKč, In this context that the value of ecosystem services locations 1 shows a value of 4438.96 milesCZKyear-1 compared to location 4, calling shows a value of 7905.01 milesCZKyear-1. On this basis, were statistically significant differences in both localities in terms of the frequency of diversity factors examined specimens of ground beetles are examined diversity index P <0001.

Kaunas – svarbus transporto, mokslo ir kultūros bei Kauno apskrities, miesto savivaldybės, Kauno rajono savivaldybės centras, antrasis pagal dydį Lietuvos miestas, kuriame aktyviai vykdomi nekilnojamojo turto sandoriai ir šio turto vertinimas.. Tyrimo tikslas – išanalizuoti ir palyginti skirtingais metodais nustatytas nekilnojamojo turto vertes. Tyrimo objektas – vieno, dviejų, trijų, keturių kambarių butai ir namai esantys Kauno mieste. Atliekant šį butų ir namų vertinimo metodų palyginimą, buvo surinkti duomenys apie 2013 metų ir 2014 metų pirmojo ketvirčio nekilnojamojo turto vertes, vertinant skirtingais metodais. Baigiamajame darbe aptariama nekilnojamojo turto vertinimas bei jo metodai bei funkcijos. Pateikiama bendroji Kauno miesto apžvalga. Supažindinama smulkiau su nekilnojamojo turto vertinimo metodais naudotais darbe. Pateikti atlikto tyrimo rezultatai, parodo nekilnojamojo turto vertinimo metodų skirtumus. Taip pat skirtingų nekilnojamojo turto vertinimo metodų pliusus ir minusus. Bei Nekilnojamojo turto vertės priklausomybę nuo tam tikrų veiksnių, vertinant skirtingais vertinimo metodais. / Kaunas is an important center of transport, science and culture, Kaunas city is the center of municipality and district municipality, as well as the central part of the country and the second largest city in Lithuania. The aim of the research - to analyze and compare fixed property values by different methods. The object of the research – houses and apartments consisting of one, two, three, four bedrooms in the Kaunas city. In the comparison of the assessment methods, the data of real estate value of the year 2013 and the first quarter of 2014, based on evaluation by different methods, was collected. This thesis deals with real estate valuation, its methods and functions. A general overview of Kaunas is provided. The methods of real estate valuation applied in research are explained in detail. Research results show the differences between real estate valuation methods. Also, the pros and cons of each method of valuation of real estate are presented. The dependence of the value of real estate on some factors when using different methods is revealed as well.

Submitted by Filipe dos Santos (fsantos@pucsp.br) on 2018-04-02T12:30:44Z No. of bitstreams: 1 Clauber Louzada Sanches.pdf: 2778253 bytes, checksum: 738c51b8544d64c1c74ff881f30371f3 (MD5) / Made available in DSpace on 2018-04-02T12:30:44Z (GMT). No. of bitstreams: 1 Clauber Louzada Sanches.pdf: 2778253 bytes, checksum: 738c51b8544d64c1c74ff881f30371f3 (MD5) Previous issue date: 2018-03-01 / This work aims to analyze the methodology of measurement of depreciated replacement cost of specialized realty in the state of São Paulo, developed by the State Comptroller General's Office applied to the AME of São José do Rio Preto. This work is justified by the importance of the management of public assets, in this specific case, the construction of the AME of São José do Rio Preto, of the State Health Department, and its reliable representation in the accounting records of the state of São Paulo. The nature of this research was made up by means of qualitative analyzes – regarding the data received, and quantitative analyzes – regarding the results obtained by the CGE. We analyzed the procedures applied by SES through the CGE according to the guidelines for measuring the depreciated replacement cost presented by the conceptual structure. This study concludes that the adoption of the concepts of measurement bases presented by NBC –T SP – Conceptual Framework Applied to the Public Sector, by CGE, allowed the development of a feasible methodology for application in the AMEs of the state of São Paulo / O presente trabalho tem como objetivo analisar a metodologia de mensuração de custo de reposição depreciado dos imóveis especializados do estado de São Paulo, desenvolvidos pela Controladoria Geral do Estado aplicado ao AME de São José do Rio Preto. Este trabalho se justifica pela importância da gestão dos bens públicos, neste caso especificamente, a edificação do AME de São José do Rio Preto da Secretaria de Estado da Saúde e sua representação fidedigna nos registros contábeis do estado de São Paulo. A natureza desta pesquisa se deu por meio das análises qualitativas, quanto aos dados recebidos, e quantitativos, quanto aos resultados obtidos pela CGE. Foram analisados os procedimentos aplicados pela SES por meio da CGE conforme as orientações para mensuração do custo de reposição depreciado do apresentado pela estrutura conceitual. Este estudo conclui que a adoção dos conceitos de bases de mensuração apresentada NBC -T SP – Estrutura Conceitual Aplicada ao Setor Público, por parte da CGE, possibilitou o desenvolvimento de uma metodologia viável para aplicação nos AMEs do estado de São Paulo

Made available in DSpace on 2016-08-02T21:42:38Z (GMT). No. of bitstreams: 1 Wilson Moises Paim.pdf: 787318 bytes, checksum: 77fe4c3321b0d98193288af05a941cf7 (MD5) Previous issue date: 2014-07-21 / The disorderly urban development and a lack of an efficient public policy have prompted to a diversification of management to natural resources, mainly when are referring to water system and sanitations. The regulatory framework excised in 80 s decade established the public policy for the natural environment, which also brought new advance topics about that, triggering a numbers of actions that turned not only for bureaucratic structure and prevention, but also for solutions to the degradation and natural resources depletion. With the advent of the specific watershed source protection laws and the São Paulo State law number 13.579/09, that cares about Billings reserve area, it is notable an advance related to management issues of development and protection of the characteristics of its location. The government used practices of the law against environmental crimes as some public policy tools tactics to contain actions refers to the environment damaged. The objective of this research, is to analyze some possible discrepancies between the financial penalties applied when occurs environmental infractions and the Models of environmental evaluation assets, to affect a simulation of deploying a hotel within protected areas and recovery watershed source at São Bernardo County located in São Paulo State. The development of this research it was based on Modified Replacement Cost (MRC) to dimension the possible impacts brought from the Enterprise Lodge Inn and its respective economic values. After, the environment impacts were related to county laws to determined values with possible fines applied to the damage caused by those companies. Among the results raised, it was verify a significant discrepancy between economic valuation and the fines applicable, which means the impacts of fines applied against impermeability of soil and groundwater contamination becomes respectively with the different total amounts of R$ 804.922,78 and R$ 453.333,33. In the beginning of the methodology used in this research, it could notice that the fines applied in cases of damage to the environment sometimes doesnt achieve the objective of the protection, which is to inhibit the action of the offender, because the real economic cost doesnt measure the value of the penalty by the time is applied / O crescimento desordenado e a ausência de políticas públicas mais eficientes levaram a uma diversificação quanto ao uso dos recursos naturais, principalmente no que se refere à água para o saneamento básico. O marco regulatório estabelecido na década de 1980 registrou as políticas públicas para o meio ambiente, que trouxeram avanços sobre o tema, desencadeando uma série de ações voltadas tanto para a estrutura burocrática e da prevenção, quanto solução para os problemas de degradação e esgotamento dos recursos naturais. Com o advento das leis específicas de proteção aos mananciais e mediante a lei 13.579/09 do Estado de São Paulo que trata sobre a área da Billings, percebeu-se um avanço na questão do gerenciamento para proteção e desenvolvimento de acordo com as características da região. Instrumentos de políticas públicas para conter as ações referentes aos danos causados ao meio ambiente, como a lei contra crimes ambientais foram às ações práticas do Estado para conter tais ações. O Objetivo desta pesquisa é analisar as possíveis discrepâncias entre as penalidades financeiras aplicadas na ocorrência das infrações ambientais e os modelos de valoração dos ativos ambientais, utilizando a simulação de implantação de um hotel em áreas de proteção e recuperação de manancial no Município de São Bernardo do Campo no Estado de São Paulo. O desenvolvimento da pesquisa se baseou no método de custo de reposição (MCR) para dimensionar os possíveis impactos gerados por um empreendimento hoteleiro e seu respectivo valor econômico. Posteriormente, os impactos ambientais foram relacionados com a legislação do município para determinar os valores das possíveis penalidades aplicáveis ao dano causado. Dentre os resultados levantados, verificou-se uma significativa discrepância entre a valoração econômica e as multas aplicáveis, sendo que nos impactos referentes a impermeabilidade do solo e contaminação do lençol freático, com diferenças superiores em relação às penalidades de R$ 804.922,78 e R$ 453.333,33 respectivamente. A partir da metodologia aplicada na pesquisa, observou-se que as penalidades incidentes em casos de danos ao meio ambiente, muitas vezes não atinge o objetivo, que é inibir a ação do infrator, pois o real custo econômico não é medido na aplicação do valor da multa.

Submitted by Frederico Costa Carvalho (fredccarvalho@hotmail.com) on 2013-12-05T18:03:51Z No. of bitstreams: 1 dissertacao_MFEE_final.pdf: 2375602 bytes, checksum: cfdff1486b99aafe0c73421e21245b0b (MD5) / Approved for entry into archive by Vitor Souza (vitor.souza@fgv.br) on 2013-12-13T14:27:10Z (GMT) No. of bitstreams: 1 dissertacao_MFEE_final.pdf: 2375602 bytes, checksum: cfdff1486b99aafe0c73421e21245b0b (MD5) / Made available in DSpace on 2013-12-16T15:59:06Z (GMT). No. of bitstreams: 1 dissertacao_MFEE_final.pdf: 2375602 bytes, checksum: cfdff1486b99aafe0c73421e21245b0b (MD5) Previous issue date: 2013-09-11 / This study investigated the value of a native forest in the Atlantic Forest biome. For this, we used the methodology of replacement cost. In addition, we sought to clarify the main determinants of this value, as well as their impacts. Were formulated four research hypotheses, namely i) the level of degradation of the área does not influence the total cost of replacement of native forest , ii) rugged topography does not influence the total cost of replacement of native forest; iii) the distance from the area to be restored to the nearest urban center does not influence the total cost of replacement of native forest , and iv) the distance from the area to be restored to the nursery that supplies seedling does not influence the total cost of replacement of native forest. To reach the results were performed simple tests for mean differences for qualitative variables. The results were that one can reject the hypothesis of rugged topography does not influence the total cost of replacement of native forest. However , it does not reject the hypothesis that the distance from the area to be restored to the nearest urban center does not influence the total cost of replacement of the native forest and the distance from the area to be restored to the nursery that supplies seedling does not influence the total cost of replacement of native forests. After this first approach a serie of regressions, using the classical ordinary least squares (OLS) is performed. Were made a sensitivity analysis of the results obtained. The survey data was obtained by conducting a survey (questionnaire) to a series of entities of reforestation industry. All four hypotheses were tested. According to the tests , it can be said that the hypothesis of the impact of rugged topography on the total cost of replacement of native forest showed nonsignificant in all models. However, the first hypothesis of the impact of the degradation level on the value of the project was rejected in all models. The third hypothesis of the impact of the distance from the area to the nearest urban center on the value of the project was rejected in two models and fourth hypothesis of the impact of the distance from the area to be restored to the nursery that supplies seedling on the total cost of replacement native forest was rejected in one model. The replacement cost of a native forest of the Atlantic Forest biome was R$ 22 thousand a hectare. This study also outlines the developments of environmental economics over time, emphasizing its main characteristics. The conclusions highlight the main points of this work, a number of theoretical and managerial implications of this study is discussed and suggestions are made for further research in this area. / O presente trabalho investigou o valor de uma floresta nativa no bioma Mata Atlântica. Para isso, utilizou-se da metodologia de custo de reposição. Além disso, buscou-se explicitar os principais fatores determinantes desse valor, bem como seus impactos. Foram formuladas quatro hipóteses de pesquisa, a saber, i) o nível de degradação da área não influencia o custo total de reposição da floresta nativa; ii) relevos mais acidentados das áreas a serem restauradas não influenciam o custo total de reposição da floresta nativa; iii) a distância da área a ser restaurada em relação ao centro urbano mais próximo não influencia o custo total de reposição da floresta nativa; e iv) a distância da área a ser restaurada em relação ao viveiro produtor de mudas não influencia o custo total de reposição da floresta nativa. Para chegar aos resultados foram realizados testes simples de diferença de médias para as variáveis qualitativas. Os resultados encontrados foram de que pode-se rejeitar a hipótese de que relevos mais acidentados das áreas a serem restauradas não influenciam o custo total de reposição da floresta nativa. No entanto, não se rejeitam as hipóteses de que a distância da área a ser restaurada em relação ao centro urbano mais próximo não influencia o custo total de reposição da floresta nativa e de que a distância da área a ser restaurada em relação ao viveiro produtor de mudas não influencia o custo total de reposição da floresta nativa. Após essa primeira aproximação, é realizada uma série de regressões, utilizando o modelo clássico de mínimos quadrados ordinários (MQO). Fez-se uma análise de sensibilidade dos resultados obtidos. O levantamento de dados foi obtido por meio da realização de uma pesquisa (questionário) a uma série de entidades do setor. Foram testadas as quatro hipóteses. De acordo com os testes realizados, pode-se dizer que a hipótese 2 sobre o impacto de um relevo mais acidentado das áreas a serem restauradas no custo total de reposição da floresta nativa se mostrou não significativa em todos os modelos. No entanto, a hipótese 1 do impacto do nível de degradação sobre o valor do projeto foi rejeitada em todos os modelos. A hipótese 3 do impacto da localização da área em relação ao centro urbano sobre o valor do projeto foi rejeitada em dois modelos e a hipótese 4 de que a distância da área a ser restaurada em relação ao viveiro produtor de mudas não influencia o custo total de reposição da floresta nativa foi rejeitada em um modelo. Chegou-se ao resultado de R$22 mil/hectare para o custo de reposição de uma floresta nativa do bioma Mata Atlântica. Esse tipo de estudo foi contextualizado no desenvolvimento feito pela economia ambiental ao longo do tempo, ressaltando suas principais características. Nas conclusões destaca-se os principais pontos do trabalho e são discutidas uma série de implicações teóricas e gerenciais do presente estudo, bem como apresentadas sugestões para novos estudos nessa área.