1,247 research outputs found

    Little Italy

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    Informational structures and informational fields as a prototype for the description of postulates of the integrated information theory

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    Informational Structures (IS) and Informational Fields (IF) have been recently introduced to deal with a continuous dynamical systems-based approach to Integrated Information Theory (IIT). IS and IF contain all the geometrical and topological constraints in the phase space. This allows one to characterize all the past and future dynamical scenarios for a system in any particular state. In this paper, we develop further steps in this direction, describing a proper continuous framework for an abstract formulation, which could serve as a prototype of the IIT postulates.National Science Center of PolandUMO-2016/22/A/ST1/00077Junta de AndalucíaMinisterio de Economia, Industria y Competitividad (MINECO). Españ

    Un ejemplo de teoría de bordismo equivalente al PL-bordismo

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    In this paper we define the CPL-manifolds and we prove, by using a desingularization procedure, that these objects give a bordism theory which is equivalente to the PL-bordism. It's interesting to note that the famíly CPL of the CPL-manifolds is not closed to taking topological cilynders

    Positioning Guglielmo Marconi\u27s wireless : a rhetorical analysis of an early twentieth-century technology.

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    This dissertation is a rhetorical analysis of Guglielmo Marconi\u27s wireless. Texts surrounding the invention reveal intersections between technology and society and communicate information about the wireless through tropes of progress. The wireless was seen as a monumental early twentieth-century technology that would change the world by extending communication potential. This dissertation demonstrates that the wireless was created rhetorically before it existed as a black-box technology. Marconi\u27s technical texts, popular press articles, and F. T. Marinetti\u27s reinscriptions are discourses where the wireless existed rhetorically. To borrow Charles Bazerman\u27s definition, the rhetoric of technology deals with the ideology surrounding objects of the built environment ; a culture\u27s attitudes and values help shape the technologies produced by a society. Technologies do not become realized without adhering to a society\u27s values, attitudes, and practices. A system of mass communication existed in the early twentieth century (telegraph and telephone wires), but, almost more importantly, the public was conditioned to embrace new technologies for the sake of human advancement. Texts surrounding the wireless\u27s creation show that certain conditions of modernity—speed, efficiency, evolution, and ahistoricity—appear as tropes of progress in wireless rhetoric. The non-mechanical factors that create or allow a technology to become realized are found in (re)presentations that show the wireless as a product in according with prevailing cultural values. This dissertation is divided into four chapters. Chapter I reviews literature on Science, Technology, and Society studies that offers a theoretical framework for analyzing the wireless as a product of modernity. Chapter II examines three important presentations (reprinted in technical journals) Marconi gave to the technical community that demonstrate four topoi in Marconi\u27s rhetoric of the wireless—cultural pride associated with advancement/evolution, expectations and current successes, economic viability, and patents showing Marconi\u27s ownership. Chapter III analyzes the rhetoric used by pro-Marconi journalists in American periodicals that construct the wireless in the popular press. Chapter IV explains how progress was embedded into Western industrial cultures. Specifically, the chapter demonstrates how the wireless and other technologies fit F.T. Marinetti\u27s love of progressive technologies, which was an exaggeration of industrial cultures\u27 fascination with new advancements

    El antemuro del castillo de Cartaya según un nuevo plano anterior a 1643

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    Hasta fechas avanzadas del siglo XIX, la fortaleza medieval de Cartaya se encontraba circundada por un antemuro perimetral que constituía su línea de defensa avanzada. Los planos hasta ahora conocidos ya nos mostraban, incluso con cierto detalle, la morfología de esta estructura, que parecía una construcción unitaria derivada de las ideas defensivas del combate artillero, razón por la que se había propuesto el siglo XVII como época de su edificación. Sin embargo, la localización de un nuevo plano, más antiguo, ha revelado su antigua configuración, más compleja y alejada de tales conceptos. Así, es preciso revisar la datación de la falsabraga del castillo cartayero, cuyos orígenes parecen remontar bastante más atrás en el tiempo.______________________________________________Well into the 19th century, the medieval fortress of Cartaya was surrounded by a perimeter second wall as a way of defence. The floor plans known until today show, even in some detail, the morphology of the structure, which looked like a single construction derived from the defensive ideas of artillery combat. That is why the 17th century was proposed as its building dating. Nevertheless, the coming up of a new floor plan, previous to the other one, has revealed its older configuration, more complex and away from those ideas. Thus, it is necessary to revise the dating of the second wall of Cartaya’s castle, whose origins seem to date back in time much longer

    Vigilancia y defensa del litoral entre el Piedras y el Odiel

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    Los constantes peligros a los que estaba sometida la vida en la costa justificaron a lo largo de la historia grandes esfuerzos para su vigilancia y defensa. El mar, que por un lado aportaba la riqueza necesaria, por otro ofrecía el riesgo y la inseguridad. En el interfluvio Piedras-Odiel, como en el resto del litoral andaluz, diversos sistemas de defensa fueron desarrollándose a lo largo del tiempo, desde los simples vigilantes a pie o a caballo, equipados con faroles para corresponderse entre sí, hasta la interesante serie de edificaciones defensivas que jalonaban este litoral. El castillo de San Miguel de Arca de Buey, torres almenaras de Punta Umbría o El Catalán, y otras mucho menos conocidas como las del Terrón o Marijata, configuraron el sistema defensivo que procuró, con modestos resultados, la seguridad de poblaciones como San Miguel, El Rincón de San Antón, El Terrón, Cartaya o Lepe.____________________Surveillance and defence of the coast between the rivers Piedras and Odiel The great efforts made to guard and defend the coast throughout history were justified in the constant dangers that threatened the life on the coast. On the one hand, the sea provided the necessary resources; on the other hand, it also offered risk and lack of safety. In the Piedras-Odiel watershed, as well as all along the Andalusian coast, several systems of defence were developed throughout the years. These systems ranged from the simple guards on foot or horses, that used to communicate by means of lamps, to the interesting defensive buildings staking out this coast. Buildings like San Miguel de Arca de Buey castle, the beacon towers in Punta Umbría and El Catalán, or even some less know towers like El Terrón or Marijata, made up a defensive system that tried to provide, with modest results, the necessary safety to villages like San Miguel, El Rincón de San Antón, El Terrón, Cartaya or Lepe

    On the locally finite chain algebra of a proper homotopy type

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    In the classical paper [A-H] Adams-Hilton constructed a free chain algebra which is an important algebraic model of a simply connected homotopy type. We show that this chain algebra (endowed with an additional structure given by a “height function”) yields actually an invariant of a proper homotopy type. For this we introduce the homotopy category of locally finite chain algebras without using the usual methods of pro-categories. As examples we consider the locally finite chain algebras of Rn+1, S2×S2−{point}, and CP2−{point}

    Primer registro de sauropterigios fósiles del Triásico Superior del suroeste de España (Ayamonte, provincia de Huelva)

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    This work reports the first record of a sauropterygian reptile remain from the uppermost Triassic of the westernmost part of the South Iberian Palaeomargin. The fossil bone, found in the Upper Triassic carbonate succession of Ayamonte (Huelva, Spain), corresponds to a neural arch of a sauropterygian. The carbonate succession was deposited in very shallow marine environment simultaneous with igneous activity during the Rhaetian (latest Triassic). The studied remain is isolated, disarticulated and presents fractures that evidence transport but also potential activity of scavengers. The neural arch is preserved as calcium phosphate enriched in some elements (e.g. Sr) relative to the surrounding carbonate sediment. The anatomic features do not allow a detailed taxonomic identification. This remain extends the record of sauropterygians to the westernmost end of the Tethys following the South Iberian Palaeomargin and evidences the colonization of the Algarve Basin during the extensional phase related with the progress of the rifting of Pangaea and the opening of the Tethys to the west.  Este trabajo se centra en el estudio del primer registro de un resto fósil de sauropterigio procedente del Triásico superior del sector oriental del Paleomargen Suribérico. El resto, encontrado en la sucesión sedimentaria carbonatada del Triásico que aflora en Ayamonte (Huelva, España), corresponde a un arco neural de un sauropterigio. La sucesión carbonatada se depositó en un ambiente marino muy somero simultáneamente a cierta actividad ígnea durante el Rhaetiense (Triásico superior). El resto fósil aparece aislado, desarticulado y presenta algunas fracturas que evidencian cierto transporte por corrientes, sin descartar la posible interacción de organismos carroñeros. El arco neural está conservado como fosfato cálcico con enriquecimiento en Sr, de acuerdo con los mapeos composicionales realizados sobre el resto fósil y el sedimento circundante. Los rasgos anatómicos no han permitido su identificación taxonómica detallada. El resto estudiado extiende el registro de reptiles sauropterigios hacia el occidente colonizando el Paleomargen Suribérico, en este caso la Cuenca del Algarve, conforme se producía la rotura (rifting) de Pangea y el Tethys se abría paso hacia el oeste con la progresiva inundación de nuevas cuencas
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