The first aim of this note is to describe an algebraic structure, more primitive than lattices and quantales, which corresponds to the intuitionistic flavour of Linear Logic we prefer. This part of the note is a total trivialisation of ideas from category theory and we play with a toy-structure a not distant cousin of a toy-language. The second goal of the note is to show a generic categorical construction, which builds models for Linear Logic, similar to categorical models GC of (...) [deP1990], but more general. The ultimate aim is to relate different categorical models of linear logic. (shrink)

Prior to this intervention the site used to be a degraded fiscal property, that functioned as a bus yard, a police legal deposit, and a restaurant parking lot. Underneath it runs the Maldonado stream culvert, covered by a concrete slab at a depth of only -20cm. Next to the site is a 5m high railroad embankment. The plot is strategically located at the end of Juan B. Justo avenue and works as a gateway to the Tres de Febrero park (also (...) known as Bosques de Palermo, the Buenos Aires’s biggest green space designed by Charles Thays in 1875). It is situated in the neighborhood of Palermo, an area that underwent a vertiginous residential and commercial expansion since the late 90´s. -/- The design approach is influenced by the adjacent urban fragments: the grounds of the Sociedad Rural Argentina, the surrounding Avenues Santa Fe-Sarmiento; the opening of Darregueyra street expected for the near future, the implementation of historic preservation guidelines for the Tres de Febrero Park, and the proposal for the development of nearby railroad yards. -/- Specifically, the project seeks to minimize the impact of the fast traffic that runs along Bullrich avenue, improving pedestrian and cycle access to the park. At the same time it defines new landscape features, utilizing the earth made available by the tunneling works of a new subway line. -/- The project comprises the structuring of an existing 800 meter long embankment and the transformation of the sidewalk into a public promenade. This is achieved through a wider sidewalk of 12m on average, which is part of a series of longitudinal stripes ranging from high speed to quiet spaces. The first band of grass and aged tipas (tipuana tipu) buffer pedestrian and cyclist from automotive traffic. Cycle traffic is organized on its own lane. The sidewalk itself contains several bays that act as urban lounges. Next, a continuous concrete bench delimits the beginning of the slope, backed by a stripe of grass that works as a soft extension. Finally, plants for contemplation are arranged as undulating traces. Rhythmic use of retaining gabions defines longitudinal segments of varying slope, unifying the spacial criterion. This series is punctuated by an amphitheater and framed by triangular plazas at the corners. -/- Material choices for hard surfaces are constrained by concerns of durability, low cost, and consistency with other ongoing public works. -/- Hard materials, as well as the plant selection needed to be low-maintenance. The palette was kept to reinforced concrete, granitic slabs, and granite stone in large size –forming retaining gabions- and as loose finishing for pavements. Likewise, the lack of a protective enclosure and of continuous surveillance dictated that urban furniture and fixtures be anti-vandalic. The stealing of these components –from inspection lids, to benches, to plants- is a common problem in urban spaces in many Latin American cities. To prevent this, fixtures must be designed according to precise specifications regarding their weight, fixing and anchoring systems, and mechanical parts. -/- Sidewalks are organized through a 6 meter grid made of granitic white slab, infilled with textured combed nonslip concrete modules. Extended bays and corner squares are finished with white and black slabs respectively. These materials are similar to another used in public spaces under construction, in the believe that it creates a collective identification of themselves along the city. -/- The continuous reinforced concrete bench is 1.10 m wide, in order to allow people to use it in non-conventional ways. Further up on the slope, undulating paths separate plant species and provide access for gardening, but are also open to use by the public. They are paved with 2 meter-long precast concrete slabs (smaller and lighter pieces were avoided to deter robbery). As they reach the gabions they connect with sloping paths covered with loose granitic stones. The gabions themselves allow the creation of varying slopes while contributing to retaining the soil, which is reinforced with geosynthetic fabric in the perimeter to avoid landslides originated by strong rains typical of the region. -/- Urban furniture is featured on the wider bays of the sidewalk and at corner plazas. It includes seats, water fountains, bicycle racks, wastepaper baskets. As a counterpoint to the linear concrete bench, groups of concrete seats are arranged informally. These seats are a reinterpretation of the dynamic BKF chair (also known as Butterfly chair), the classic Argentinean design of the 1930’ by Antonio Bonet, Juan Kurchan, and Jorge Ferrari-Hardoy. A few low concrete tables complete these spaces as authentic urban lounges. Lighting design accompanies the general features of the project and creates a new scenography emphasizing night-time usage. -/- Landscape gardening criteria is set up by a selection of various species of high-resistant pasture (grass). The higher the slope, the higher the grass, increasing the final volumetric result. Based on considering the original tipas line (tipuana tipu, a species from the north of Argentina, yellow flowering) as a vertical wall that frames the view, the horizontal stripes contain a single species each, differing in size, shade and flowering periods –adding, in the middle band, a changing color on the big green plane slope in the same chromatic range. The final configuration of the stripe sequence from bottom to top: bermuda grass, bulbine frutescens, euryops pectinatus. The upper band existing native species is reinforced with new samples: paspalum exaltatum + cortadera selloana and ipomea + thumbergia climbing the railway fence. Each sector between gabions has an automated system of drip irrigation. Near the corner plazas, several palms are planted to provide shade and identity to the street-crossing. -/- The intervention proposes an ambivalent effect on the landscape, trascending the merely ornamental by accompanying the motorist in speed, while conforting the pedestrian with spaces for contemplation and urban relax. (shrink)

This research lies within the scientific and pedagogic scope of Philosophy for Children, more specifically its implementation in a community of philosophical inquiry, the pedagogic and epistemological model of the Philosophy for Children, with pre-school children. The purpose was to research the type of answer this community of inquiry would give to some logic problems by resorting to Venn Diagrams. Specifically, the observation of problem-solving through the intersection of sets was under scrutiny, and the conclusion was that this logic resource (...) is not only viable in the context of pre-schooling, as well as relevant for the formation of thinking. (shrink)

Uma seção da Gramática Especulativa de C.S.Peirce – Dez classes de signos – recebeu, a partir de 1903, um importante tratamento diagramático. Neste artigo, são apresentados e discutidos dois diagramas desenvolvidos por Peirce para as dez classes, incluindo esboços desses modelos.

No presente trabalho discutiremos a tese segundo a qual provas com diagramas são heterogêneas, i. e., envolvem casos de raciocínio visual. Em uma primeira seção, examinaremos o uso informal de diagramas de Venn em provas conjuntistas, procurando determinar em que sentido provas com diagramas seriam heterogêneas. Tais provas su-postamente envolveriam raciocínio visual no sentido em que a validade das inferências dependeria de características visualizáveis dos diagramas e não de regras de derivação. Em uma segunda seção, investigaremos (...) quais seriam os aspectos relevantes para a validade das inferências diagramáticas. A seguir, na terceira seção, argumentaremos que a concepção de provas diagramáticas como envolvendo essencialmente um elemento visual apresenta sérios problemas. (shrink)

Este artigo procura desenvolver o âmbito da assim chamada ontopolítica como contribuição original do pensamento do G. Deleuze para a filosofia política contemporânea. Com este objetivo, veremos que Deleuze toma o conceito de poder em Foucault e lhe confere alçada ontológica. Este conceito de poder dá acesso a outro elemento importante da filosofia política deleuzeana, ou seja, o estudo dos diagramas históricos do poder nas denominadas sociedades disciplinar e de controle. Com o diagrama de funcionamento das mesmas podemos entender (...) qual o retrato deleuzeano para a democracia em sociedades contemporâneas. Adentrando a ontopolítica deleuzeana, nos dedicaremos aos conceitos de maioria, minoria e devir-minoritário. É neste ponto que se faz o encontro da ontopolítica de Deleuze com a ontologia matemática de Ch. Sanders Peirce. Acontece que os conceitos ontopolíticos de Deleuze, além de sua vinculação com uma ontologia do poder, recebem também um tratamento matemático, tendo em vista certas noções aritméticas e geométricas. As maiorias e minorias são conjuntos contáveis que são atravessados por devires não contáveis. Com isso, chegaremos ao ponto central do presente artigo, onde realizamos uma incursão inicial à imagem dos conceitos de maioria e minoria em Deleuze, com base na teoria das coleções e multidões de C. S. Peirce, principalmente com relação à ontologia matemática nela incluída. Quanto a isso, a principal operação será mostrar de que forma a distinção deleuzeana entre maiorias/minorias contáveis e devir-minoritário não contável pode ser escandida em termos de coleções discretas denominadas enumeráveis, denumeráveis e abnumeráveis ou pós-numeráveis, de acordo com a terminologia de Peirce. (shrink)

This article presents the first results of a research on visual models for the classifications of semiotic processes. The main issue discussed is how a graphic design methodology, associated with computer graphics resources, may contribute to the construction of interactive models, that can be used as tools for the investigation of C. S. Peirce theory of signs. Two models are presented: the first is an interactive 3-D model of Peirce's 3-trichotomic classification; the second is a computer program that builds diagrams (...) for any n-trichotomic classification of signs, and facilitates the analysis and comparison of different hypothesis regarding their structures. (shrink)

Este artigo procura desenvolver o âmbito da assim chamada ontopolítica como contribuição original do pensamento do G. Deleuze para a filosofia política contemporânea. Com este objetivo, veremos que Deleuze toma o conceito de poder em Foucault e lhe confere alçada ontológica. Este conceito de poder dá acesso a outro elemento importante da filosofia política deleuzeana, ou seja, o estudo dos diagramas históricos do poder nas denominadas sociedades disciplinar e de controle. Com o diagrama de funcionamento das mesmas podemos entender (...) qual o retrato deleuzeano para a democracia em sociedades contemporâneas. Adentrando a ontopolítica deleuzeana, nos dedicaremos aos conceitos de maioria, minoria e devir-minoritário. É neste ponto que se faz o encontro da ontopolítica de Deleuze com a ontologia matemática de Ch. Sanders Peirce. Acontece que os conceitos ontopolíticos de Deleuze, além de sua vinculação com uma ontologia do poder, recebem também um tratamento matemático, tendo em vista certas noções aritméticas (contável e não contável) e geométricas (linhas). As maiorias e minorias são conjuntos contáveis que são atravessados por devires não contáveis. Com isso, chegaremos ao ponto central do presente artigo, onde realizamos uma incursão inicial à imagem dos conceitos de maioria e minoria em Deleuze, com base na teoria das coleções e multidões de C. S. Peirce, principalmente com relação à ontologia matemática nela incluída. Quanto a isso, a principal operação será mostrar de que forma a distinção deleuzeana entre maiorias/minorias contáveis e devir-minoritário não contável pode ser escandida em termos de coleções discretas denominadas enumeráveis, denumeráveis e abnumeráveis ou pós-numeráveis, de acordo com a terminologia de Peirce. (shrink)

Este libro reúne seis trabajos del autor que procuran suministrar un espacio conceptual para la adecuada comprensión de las prácticas jurídicas en nuestras sociedades. Se trata de elaborar un concepto de derecho, y dar cuenta de sus relaciones con la moralidad, que acoja la posibilidad de que la aplicación judicial del derecho constituya un ámbito en donde la moralidad y de dar cuenta de sus relaciones con la moralidad, que acoja la posibilidad de que la aplicación judicial del derecho constituya (...) un ámbito en donde la moralidad y el derecho se entrecrucen. (shrink)

Taking into consideration the concepts of „knowledge” and „power”, whose correlation authored the very idea of modernity, this study on Foucault traces their evolution through two cultural patterns: the archive and the diagram. A world picture can be constructed only by making appeal to the archives of knowledge. In every historical moment the structure and the quality of the archive actuate the initiatives of power, that is, the play of forces between actors, institutions, centres of decision in society, and between (...) agents and patients. The play of these forces, ever reshaping, allows the temporary drawing of the power diagram. It is in the precarious balance realized by a diagram that the social play happens, which, by reverting to its archive sources, transforms the cycle of knowledge. As a central idea, it can be asserted that it is between knowledge and power, between archive and diagram and that it is according to the actual schemes of their correlation that the evolutionary curve of a human world is decided. (shrink)

El artículo aborda la «cuestión urbana» en la modernidad desde el marco de los estudios de la gubernamentalidad desarrollado por Michel Foucault, tomando la siguiente hipótesis: la policía no solo es fundamento de la ciudad moderna, sino también de la proliferación de saberes y técnicas que proyectan y construyen a la par un orden social y espacial, que persigue paralelamente la «felicidad» de los ciudadanos y el «incremento del poder» del Estado. El fin es mostrar que el estrecho vínculo de (...) «policía» y «saber social» en el gobierno de la población constituye el acelerador de la erosión del sentido político de la ciudad, definido por el conflicto ciudadano.This article examines the «urban question» in modernity, reading Foucault’s studies on governmentality. The hypothesis considers that Police is not only the foundation of the modern city, but also of the proliferation of knowledges and techniques that project and construct a social and spatial order, which pursues in parallel the «happiness» of citizens and the «increase of power» of the State. The aim is to show that the close link of «police» and «social knowledge» in the government of the population constitutes the accelerator of the erosion of the political sense of the city, defined by the citizen conflict. (shrink)

Se defiende que el conflicto que advierte Panofsky entre la proposición 8 de la Óptica de Euclides y la Perspectiva Lineal carece de fundamento. Se mostrará que las reglas de construcción perspectiva sugeridas por Piero della Francesca usan las definiciones de Euclides y armonizan sin dificultad la proyección perspectiva y la proposición 8. Si el surgimiento del espacio moderno exige una ruptura con el espacio psicofisiológico, como advierte Panofsky, esta ruptura se debe defender con argumentos distintos al de esgrimir el (...) conflicto aludido. (shrink)

Comentaré sólo la sección 2 de la contribución de Amartya Sen, donde discute un reciente artículo mío (Harsanyi, 1975).