Resposta térmica de um compósito PEEK+PTFE+Fibra de carbono+grafite

Composites based on PEEK + PTFE + CARBON FIBER + Graphite (G_CFRP) has increased application in the top industries, as Aerospace, Aeronautical, Petroleum, Biomedical, Mechanical and Electronics Engineering challenges. A commercially available G_CFRP was warmed up to three different levels of thermal energy to identify the main damage mechanisms and some evidences for their intrinsic transitions. An experimental test rig for systematize a heat flux was developed in this dissertation, based on the Joule Effect. It was built using an isothermal container, an internal heat source and a real-time measurement system for test a sample by time. A standard conical-cylindrical tip was inserted into a soldering iron, commercially available and identified by three different levels of nominal electrical power, 40W (manufacturer A), 40W (manufacturer B), 100W and 150W, selected after screening tests: these power levels for the heat source, after one hour of heating and one hour of cooling in situ, carried out three different zones of degradation in the composite surface. The bench was instrumented with twelve thermocouples, a wattmeter and a video camera. The twelve specimens tested suffered different degradation mechanisms, analyzed by DSC (Differential Scanning Calorimetry) and TG (Thermogravimetry) techniques, Scanning Electron Microscopy (SEM) and Energy-Dispersive X-Rays (EDX) Analysis. Before and after each testing, it was measured the hardness of the sample by HRM (Hardness Rockwell M). Excellent correlations (R2=1) were obtained in the plots of the evaporated area after one hour of heating and one hour of cooling in situ versus (1) the respective power of heat source and (2) the central temperature of the sample. However, as resulting of the differential degradation of G_CFRP and their anisotropy, confirmed by their variable thermal properties, viscoelastic and plastic properties, there were both linear and non-linear behaviour between the temperature field and Rockwell M hardness measured in the radial and circumferential directions of the samples. Some morphological features of the damaged zones are presented and discussed, as, for example, the crazing and skeletonization mechanism of G_CFRP

Indigenous land reconfiguration and fragmented institutions: a historical political ecology of Tsimane’ lands (Bolivian Amazon)

Lands inhabited by indigenous peoples often have low population density but abundant natural resources. For those reasons, many actors have historically attempted to occupy those lands or use the resources in them. Increasing pressures over lands occupied by indigenous peoples have resulted in the awakening of indigenous peoples over their rights to land and resources generating many debates over indigenous peoples' rights to land and self-governance. In this article, we provide a historical and geographical overview of territorial and governance issues among the Tsimane', an indigenous group native to the Bolivian Amazon. We examine how the Bolivian state economic policies implemented during the 20th century affected the Tsimane' ancestral lands, and how – over the late-20th century – the Bolivian state accommodated Tsimane' claims to lands in between multiple interests. We show how national policies led to the reconfiguration of Tsimane' territoriality and to a fragmented institutional representation. Current indigenous territories and indigenous political representation are an expression of conflictive policies that have involved multiple actors and their specific interests on indigenous lands and its resources.

Mineral resources in Lower Brule Indian Reservation

On the Lower Brule Indian Reservation in South Dakota, about 3 million tons of metallic manganese are in low-grade deposits in the DeGrey Member of the Pierre Shale on the reservation. The geology and methods of mining and processing this sub-economic mineral resource have been studied extensively; technologically, extraction of manganese is possible. However, an efficient, economical method to separate manganese-bearing nodules from the shale host rocks has yet to be found. The manganiferous nodules occur in the Oacoma zone of the Sully shale member (De-Grey Member) which is a subdivision of the South Dakota Pierre Shale formation. These nodular deposits have an interesting similarity in stratigraphical position, lithology and manganese content to those of the Porcupine Mountain area in Manitoba.

Robespierre y Sade : Ética, Estética y Política en el ocaso del Siglo de las Luces

La preocupación por definir una pauta de comportamiento éticamente correcto una vez que se cuestiona la trascendencia es central en todo el pensamiento ilustrado francés. El objetivo del presente trabajo es reconstruir algunas de las ideas sobre la moral expuestas en sus discursos por el líder jacobino, Robespierre, y demostrar de qué modo son desarmadas y puestas en ridículo en la literatura del Marqués de Sade mediante una particular concepción de la naturaleza. En ella, como veremos, se condensa una doble crítica: por un lado, al ideal rousseauniano que supone que el hombre es originariamente bueno y depravado por las instituciones y, por el otro, a la posición de Robespierre que sostiene que una República puede erigirse sobre la virtud. La elaboración sadiana del concepto de “naturaleza", expresada fundamentalmente en La philosophie dans le boudoir a través de la voz de Dolmancé, se convierte en la herramienta fundamental para socavar los presupuestos iluministas sobre los que se asienta la moralidad revolucionaria.

Robespierre! drama [histórico] en 3 actos.

"Estrenado ... en el Gran Teatro Hidalgo, el 13 de julio de 1888."

Charlotte Corday and certain men of the revolutionary torment,

Mode of access: Internet.

Robespierre and the red terror;

Mode of access: Internet.

Belinda of the Red Cross /

Robert W. Hamilton is a pseudonym of Edward Stratemeyer.

Biographie des Sagamos illustres de l'Amérique Septentrionale : précédée d'un index de l'histoire fabuleuse de ce continent /

Errata slip inserted

Le crime de Guillaume II et la Belgique; récits d'un témoin oculaire.

Annexes: I. Deux proclamations allemandes en Belgique.--II. Une lettre de Maximilien Harden.--III. Le manifeste des intellectuels allemandes et les réponses venues de divers pays]--IV. La lettre pastorale du cardinal Mercier et les incidents qu'elle a provoqubes.--V. Extraits des rapports de la Commission belge d'enquête sur la violation des règles du droit des gens, des lois et des coutumes de la guerre.--Une lettre de M. Lafontaine.

Lettres de l'abbé Lebeuf publiées par la Société des sciences historiques et naturelles de l'Yonne,

Mode of access: Internet.