PITCH FUNCTION COMPARISON METHODOLOGY FOR SUPPORTING A SMART 3D SCANNER SELECTION

When working with 3Dscanner devices, one of the most critical problems is usually the low quality of the point cloud provided by the scanning device. This problem mainly consists of the following two aspects. The first one is surely the choice of the strategy used to acquire the object shape. Most of the times, the selected strategy is based on selective sampling. This choice proved to be valid, especially when working with Free-Form surfaces: by using a selective sampling strategy is in fact possible to limit point density increase to those regions showing high morphological complexity. The second aspect is the difficulty of identifying which 3Dscanner device is the one that better fulfils the specific application needs, which vary depending on the specific scenario in which the costumer/user works (resolution, accuracy, …). As far as this last issue is concerned, the presence of many different acquisition technologies and devices on the market is a source of confusion for the users, who sometimes choose the wrong solution instead of finding the most efficient one. Hence, in order to support the potential users in their selection, this paper aims to propose a solution able to integrate the morphological analysis of the object acquired with the costumer needs (resolution, accuracy, …) and with the 3Dscanner performances in order to help users to identify the optimal solutio

El psicoanálisis en la cultura comunista: Buenos Aires y París, 1949

En 1949, La Nouvelle Critique, la revista intelectual de los comunistas franceses, publicaba una dura crítica al psicoanálisis, reproducida en Buenos Aires ese mismo año por Gregorio Bermann en Nueva Gaceta, una revista de la constelación del Partido Comunista Argentino dirigida por Héctor Agosti. En el escenario de la Guerra fría, el psicoanálisis quedaba ubicado entre las expresiones ideológicas del capitalismo y al servicio de la ofensiva mundial norteamericana. En Francia esa cruzada duró pocos años. Hacia comienzos de los sesentaLouis Althusser renovaba el pensamiento marxista y la lectura de Freud y en 1964 publicaba en la misma revista, La Nouvelle Critique, “Freud et Lacan”. En Buenos Aires, en cambio, la guerra contra el freudismo por parte de los comunistas duró, por lo menos hasta fines de los años sesenta. El artículo aborda el momento inaugural de esa historia y estudia las relaciones y malentendidos de la recepción de esa polémica en las condiciones locales de la cultura comunista.In 1949, Nouvelle Critique, the intellectual magazine of the French Communists published a harsh critique of psychoanalysis, reproduced in Buenos Aires the same year by Gregorio Bermann in Nueva Gaceta, a journal belonging to the constellation of the Argentine Communist Party and directed by Héctor Agosti. In the scene of the Cold War, psychoanalysis was located among the ideological expressions of Capitalism and in the service of American world-wide offensive. In France that crusade lasted a few years. Bytheearly sixties, Louis Althusser renewed the Marxist thought and the reading of Freud, and in 1964, in the same magazine, La Nouvelle Critique, published “Freud et Lacan”. In Buenos Aires, however, the war against Freudianism by the Communists lasted atleast until the endofthe sixties. The article discusses the inaugural moment of that history and studies the relations and misunderstandings of the reception of this controversy in the local conditions of the communist culture.Fil: Vezzetti, Hugo Mario. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Psicología; Argentin

Development of a dynamic pressure calibration technique

The report deals with work continuing on the development of a method of producing sinusoidally varying pressures of at least 34 kPa zero-to-peak with amplitude variations within plus or minus 5% up to 2 kHz for the dynamic calibration of pressure transducers. Sinusoidally varying pressures of 34 kPa zero-to-peak were produced between 40 Hz and 750 Hz by vibrating a 10-cm column of a dimethyl siloxane liquid at 36gn zero-to-peak. Damping of the liquid column was accomplished by packing the fixture tube with a number of smaller diameter tubes