Propriedade de relações e Relações de equivalência

O vídeo traz os conceitos relativos às relações entre conjuntos e muito dos conceitos relacionados, como as propriedades de relações, onde as relações são definidas sobre um mesmo conjunto sendo uma parte importante do estudo de relações; e as relações de equivalência. Também apresenta os conceitos de relação reflexiva, relação irreflexiva, relação simétrica, relação antissimétrica,e relação transitiva. A relação é uma comparação entre objetos. Para verificar se uma relação R tem ou não alguma propriedade é necessária considerar o conjunto sobre o qual a relação está definida. Por fim, o vídeo traz conceitos da relação de equivalência que são relações que apresentam forte semelhança com a relação de igualdade; e traz as classes de equivalência, que são conjuntos de elementos que fazem parte do conjunto original.

Estudo da síntese e propriedade magnética de ferritas de manganês/cobalto dopadas com níquel

For the chemical method of synthesis of co-precipitation were produced ferrite powders manganese-cobalt equal stoichiometric formula Mn (1-x) Co (x) Fe2O4, for 0 < x < 1, first reagent element using as the hydroxide ammonium and second time using sodium hydroxide. The obtained powders were calcined at 400 ° C, 650 ° C, 900 ° C and 1150 ° C in a conventional oven type furnace with an air atmosphere for a period of 240 minutes. Other samples were calcined at a temperature of 900 ° C in a controlled atmosphere of argon, to evaluate the possible influence of the atmosphere on the final results the structure and morphology. The samples were also calcined in a microwave oven at 400 ° C and 650 ° C for a period of 45 minutes possible to evaluate the performance of this type of heat treatment furnace. It was successfully tested the ability of this group include isomorphic ferrite with the inclusion of nickel cations in order to evaluate the occurrence of disorder in the crystalline structures and their changes in magnetic characteristics.To identify the structural, morphological, chemical composition and proportions, as well as their magnetic characteristics were performed characterization tests of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectroscopy (EDX), thermogravimetric (TG), vibrating sample magnetometry (MAV) and Mössbauer spectroscopy. These tests revealed the occurrence of distortion in the crystal lattice, changes in magnetic response, occurrence of nanosized particles and superparamagnetism

Propriedade fotoluminescente da ZrO2: Tb+3, Eu+3, Tm+3 obtida pelo método de polimerização de complexos

Recent studies are investigating a new class of inorganic materials which arise as a promising option for high performance applications in the field of photoluminescence. Highlight for rare earth (TR +3 ) doped, which have a high luminous efficiency, long decay time and being able to emit radiation in the visible range, specific to each element. In this study, we synthesized ZrO2: Tb +3 , Eu +3 , Tm +3 nanoparticles complex polymerization method (CPM). We investigated the influences caused by the heat treatment temperature and the content of dopants in zirconia photoluminescent behavior. The particles were calcined at temperature of 400, 500 and 600 ° C for two hours and ranged in concentration of dopants 1, 2, 4 and 8 mol% TR +3 . The samples were characterized by thermal analysis, X-ray diffraction, photoluminescence of measurements and uv-visible of spectroscopies. The results of X-ray diffraction confirmed the formation of the tetragonal and cubic phases in accordance with the content of dopants. The photoluminescence spectra show emission in the region corresponding simultaneous to blue (450 nm), green (550 nm) and red (615 nm). According to the results, ZrO2 particles co-doped with rare earth ions is a promising material white emission with a potential application in the field of photoluminescence

A Servidão Administrativa e o Estado Regulador: Compatibilidade com o Princípio Constitucional da Legalidade e a Limitação ao Direito Real de Propriedade

The economic changes occurred in the 90s, with the restructuring and privatization of various sectors of the economy have led to a redefinition of the State role, assuming a position of regulator and supervisor of public services in place to direct its role as straight intervenor. It is through the regulatory agencies, autarchies with special legal personality under public law, that the Regulator State will act. In this context, the first objective of this research is to analyze the legality of easements imposed by entities of the Direct Administration and Regulatory Agencies, whose execution is delegated to legal persons of private law, being those public service companies or mixed-economy societies. This examination in question the limits of servitude as a restrictive institute of property rights, observing the principles of function, supremacy of the public interests over the private ones, legality and the separation of powers. Defend the property rights like a fundamental right and your insurance as determining factor of economic development and social justice. Use the procedure in use will be the historiccomparative procedure, in order to demonstrate the legality of the public act as a maximum attempt to preserve the balance between the expansion of public services in various sectors of the economy, and the preservation of property rights, through regulation

O impacto do pagamento da participação sobre a produção de petróleo e gás natural sobre a renda familiar e a propriedade no Município de Governador Dix-Sept Rosado no período de 1998 a 2004

This scientific study deals about the oil and natural gas production participation payment impact in the county of Governador Dix-sept Rosado, Rio Grande do Norte, between 1998 to 2004, applied to family income and property. To do so, this analysis focus on the ricardian´s theory exposition which merges from the concept of the mineral income, in concern to the legal establishment of royalties. This paper also shows the world evolution oil exploration, inserting Brazil in this scene as a oil and natural gas producter. It identifies the productive site of oil and natural gas in Rio Grande do Norte as the Potiguar Oil Area, characterizing its components in the demographic, physical and social aspects, to reflect in the focus point of observation which is the Governador Dix-sept Rosado county. The participation payment on oil and natural gas is demonstrated in a qualitative analysis both in Brazil as in Rio Grande do Norte. The payments given to the land owners in this federative unity are shown in the period of analysis of this essay. The study tells, based in a field research, the benefaction impact of the payment to the land owners over the income and property. The family income were highly impacted, causing economic social classes change to some land owners. The property had less or none impact. It was found negative externalities as the income utilization to other county uses, not causing a multiplier effect in the studied county. The fact of the not utilization of the properties on productive investments in order to supply the finite characteristic of oil and this source of royalties, contradicts one of the reasons of its establishment which is the payment for its productive exhaustion of a land resource

Direitos de propriedade da terra rural no Brasil: uma proposta institucionalista para ampliar a governança fundiária

O artigo discute, sob uma perspectiva institucionalista, a dimensão do problema fundiário brasileiro expresso pela fragilidade dos direitos de propriedade da terra rural. Além dos condicionantes históricos referidos no texto, o artigo chama a atenção para o papel das instituições de registro e cadastro de imóveis que, por estarem separadas e não integradas, favorecem as práticas de fraude, apossamento e potencializam os conflitos fundiários. O artigo conclui com uma proposta de mudança institucional, baseada no aumento da governança da terra, no recente contexto favorável ao aperfeiçoamento da estrutura de direitos de propriedade da terra.

Arquitetura da informação no ambiente digital: avaliando as relações com o direito da propriedade intelectual

Investigates the relationship between Information Architecture in digital environments with Intellectual Property Rights. The work is justified by the need to better understand the emerging dynamics of Digital Information and Communication Law Technologies and Intellectual Property Rights. Three areas of knowledge are directly related to the study: Information Science, Law and Computer Science. The methodology used in the investigative process is aligned with the qualitative approach. With respect to the technical procedures the research is classified as bibliographic or secondary sources. The results showed that the current Brazilian legislation does not provide the adequate mechanisms necessary to protect the intellectual property rights associated to an Information Architecture project to its holders.

Benefícios econômicos agregados às propriedades urbanas pelas paisagens naturais

Amenities value provided by green areas, sea, river and natural landscapes are hardly perceived and incorporated on urban planning and development. In this work, distance and view to protected and non-protected green areas, sea and river were evaluated as to how they increase the housing prices in Natal. Hedonic pricing methods were used with linear models to estimate the marginal implicit value of environmental, residential and neighborhood features. Results on Chapter 1 demonstrate the view to the sea and protected natural areas were largely capitalized on housing prices, while non-protected natural areas didn t display such effect. Housing prices also increase when close to the sea or to parks entrance. However, housing prices fall when houses are near non-protected natural areas. When estates with sea view were excluded, the protected natural areas view and a longer distance to non-protected natural areas increased dwelling prices. Results on Chapter 2 point the sea view as an hedonic variable the contributes strongly to the property selling prices, even though not always as the greatest contributor; furthermore, the property proximity to Dunas Park or City of the Park entrance increases its price, as does closeness to Dunas Park, view to City of the Park or Dunas Park. On the other hand, selling prices diminish if properties are close to City of the Park or Morro do Careca. Results on this study confirm the hedonic pricing methods is an important intrument, capable of revealing to popullation the importance of enviromental amenities and can be used by public managers for creating public policies for conservation and restoration projects

Efeito da concentração de ácido lático sobre a propriedade de expansão em amidos modificados fotoquimicamente

Uma característica valorizada pelo setor alimentício é a propriedade de expansão dos grânulos de amido. Com este trabalho, teve-se por objetivo avaliar o efeito da concentração de ácido lático durante tratamento de modificação fotoquímica das féculas de batata-doce (Ipomoea batatas), biri (Canna edulis), mandioca (Manihot esculenta) e taioba (Xanthosoma sagittifolium). Pelos resultados obtidos neste experimento, nas condições em que este foi realizado, conclui-se que a concentração de ácido lático interferiu na propriedade de expansão das féculas de batata-doce, mandioca e taioba e não apresentou efeito na fécula de biri, devendo ser ajustado para cada tipo de fécula a ser modificada. Os índices de expansão obtidos nas diferentes féculas foram considerados baixos, quando comparados aos índices obtidos para fécula de mandioca modificada.

Viabilidade econômica para produção de mel em propriedade familiar

Em 2009, o Brasil quebrou o seu recorde de exportação de mel, gerando receita superior a US$ 65 milhões. Entretanto, existe uma lacuna nos aspectos econômicos, para grande parte dos apicultores inseridos nesta cadeia. Desta forma, levantou-se o investimento necessário para a produção de mel, em uma propriedade familiar de Cajuru (SP), com estimativas de investimento e custos de produção baseados no Custo Operacional Total (COT) utilizado pelo Instituto de Economia Agrícola, obtendo-se R$ 97.093,00 como valor total do investimento. Para a análise econômica, avaliando-se a produção de mel originária de flor de laranjeira e silvestre, o custo operacional total foi de R$ 16.400,13, considerando-se que as despesas com insumos perfizeram 70% do Custo Operacional Efetivo (COE) e 26% do COT, obtendo-se índice de lucratividade de 46%. em relação ao ponto de nivelamento, o apicultor precisa produzir 4.659 kg de mel, ou vender ao preço mínimo de R$ 1,93/kg a produção obtida, para cobrir os custos. Constatou-se, com base no fluxo de caixa, TIR de 7,24% e que o investimento inicial retorna em 10 anos, mostrando resultados atrativos para este segmento agropecuário, considerando-se a racionalidade de uso dos fatores de produção, bem como um aumento progressivo na quantidade produzida.