A prova dos nove lida nos livros didáticos de aritmética: O caso da segunda aritmética de José Teodoro de Souza Lobo

Este artigo apresenta uma análise sobre a abordagem do conteúdo “prova dos nove”, presente no livro didático “Segunda Aritmética” do ano de 1935, escrito por José Teodoro de Souza Lobo. Intenta-se compreender em quais conteúdos do livro esta técnica de verificação de cálculo escrito está vinculada e de que modo foi apresentada. Trata-se do recorte de uma pesquisa de mestrado em andamento do Programa de Pós Graduação em Educação Científica e Tecnológica da Universidade Federal de Santa Catarina. A pesquisa se insere no campo de investigação da história da educação matemática adotando a perspectiva de Wagner Rodrigues Valente, e objetiva identificar e analisar as diferentes abordagens metodológicas da prova dos nove presentes nos livros didáticos de Aritmética no período de 1890 a 1970, que compreende a época de implementação dos Grupos Escolares no Brasil até sua extinção. Esta investigação servirá para o desenvolvimento da dissertação e contribuirá para a escrita da trajetória histórica da matemática escolar

Experimental analysis of flameless combustion for reduction of pollutants

Paper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.This report presents a special form of combustion, called flameless combustion. In contrast to the combustion within stabilized flames, temperature peaks can be avoided at flameless combustion. Critical points of this technology are the realization of thermofluodynamic conditions which stabilize the flameless combustion process and a design to reach flameless conditions. Burners for flameless combustion usually show complex geometries which make simplified schemes difficult and inappropriate. In this case, the present paper proposes a study to determine the viability of a flameless burner design for experimental investigation and a combustion chamber on a laboratorial scale able to use high temperature air to reduce pollutant emissions. During the experiments, it will be used natural gas and preheat air. The influence of the field flow, chamber temperature and preheating air temperature on reaction zone volume was examined using techniques capable of analyzing the temperature field in the combustor. The main conclusions were: a) in contrast to the flames, the combustion had low internal temperature gradients; b) the system has promoted changes in the volume characteristics of combustion significantly reducing pollutants: NOx, CO and UHC (Unburned Hydrocarbons); c) to same conditions no visible flame was observed during the test.dc201

Labour-centred development in Latin America: two cases of alternative development

The ‘pink tide’ in Latin America, or what remains of it, is drawing increasing criticisms from the political left for its inability to confront existing socio-structural inequalities. This article contributes to these debates in two ways. First, as a means of understanding better the development strategies that have been followed by left-leaning governments, it highlights and critiques what it labels Elite Development Theory (EDT) encompassing Washington Consensus and Statist Political Economy. It shows how despite its self-stated objectives - the amelioration of the conditions of the poor and their uplifting - EDT is grounded in elite assumptions about social change: States and corporations are posited as prime-movers in the development process while collective efforts of labouring classes to pursue their own developmental strategies are ignored and/or de-legitimated. Exploitation, oppression and the ideological delegitimation of labouring class collective actions form the core of EDT. The second contribution of this article is to argue for an alternative form of what it terms labour-centred development (LCD). This argument is supported through an examination of the Chilean cordones industriales and Argentinian empresas recuperadas por sus trabajadores (ERT) movements. The article concludes that whilst LCD may be a rarity, its existence offers the basis for alternative development theory and strategy

The Lavaca County Tribune Article

Information printed in The Lavaca County Tribune concerning David Giles Bowers, including biographical information and his obituar

The Lavaca County Tribune Article

Information printed in The Lavaca County Tribune concerning David Giles Bowers, including biographical information and his obituar

Signed and sealed Deed between Matheiu Murphy and A. M. Erskine.

The Capote Ranch refers to Jose de la Baume's ranch originally located 45 miles northeast of San Antonio. Jose, a French immigrant, had built a log cabin which was later relocated and restored at the Ranching Heritage Center in Lubbock, Texas, in 1975. It was provided by Wallace and Maurice Harrell of the Harrell Cattle Company. Located in South Texas, Gonzales County was created in 1836 and organized in 1837. It was named after Coahuila y Texas Governor Rafael Gonzales. Its county seat is Gonzales. The area was among the first to be settled by an Anglo-American settlement known as the DeWitt Colony late in the 1820s. Its main economy is agribusiness.The collection contains photocopied probate records (1840-1847) from Gonzales County, Texas, which detail properties and their values from several wills, photocopied abstracts (1845-1917) dealing with the six leagues of land known as the El Capote Ranch in Gonzales County, photocopies of correspondence, financial records, diaries, and maps to the El Capote Ranch.El Capote Ranch Records, 1830-1917 and undated, Southwest Collection/Special Collections Library, Texas Tech University, Lubbock, Texa

Can Prefigurative Politics Prevail? The Implications for Movement Strategy in John Holloway’s Crack Capitalism.

The desire to overcome the alienated labor of capitalism manifests itself in the daily actions of people everywhere. John Holloway argues that social movements must build upon this liberatory impulse, challenging not only the rate of exploitation but also workers\u27 loss of control over the process of production and allocation (and, by implication, the loss of control in other arenas of life). Revolutionary change, in turn, will result from these movements creating thousands of \u27cracks\u27 in the capitalist system by asserting alternative ways of living. Holloway\u27s argument for prefigurative movements is ambiguous on several points, however: the role of political orgnaizations, the role of alternative institutions, and the appropriate approach of social movements to the state. We propose some friendly amendments, placing great emphasis on the need for strong political organizations and counter-institutions, but also for selective engagement with dominant institutions. A revolutionary strategy must combine the construction of prefigurative counter-institutions with struggles for reform of existing structures.Yet the dangers of oligarchization and hierarchy within movements are very real, and thus there is a need for structures that are ruthlessly democratic and ideologies that are explicitly intersectional in their approach to fighting different forms of oppression