Direct support and general support maintenance : modem radio teletypewriter, MD-522A/GRC (NSN 5815-00-999-5277).

"11 May 1984."

Implementação em FPGA de um Modem QPSK

Esta dissertação insere-se num conjunto de trabalhos a decorrer no Instituto de Telecomunicações de Aveiro que tem como objetivo o desenvolvimento de um sistema de comunicação para um UAV. Neste sentido, apresenta a implementação e validação de um modem em banda base aberto e flexível implementado em FPGA, baseado em abordagem SDR, com possibilidade de integraçãoo no sistema de comunicação com o UAV. Ao longo desta dissertação implementou-se, utilizando o MATLAB, um modem de modulação adaptável, ao qual foram integrados algoritmos de sincronismo e de correção de fase. Desta forma, foi possível realizar uma análise ao modelo comportamental dos vários constituintes do modem abstraindose dos tempos de atraso do processamento ou da precisão da representação dos dados, e assim simplificar a sua implementação em hardware. Analisado o modelo comportamental do modem desenvolvido em MATLAB realizou-se a sua implementação em hardware para a modulação QPSK. A sua prototipagem foi realizada, com recurso à ferramenta computacional Vivado Design Suite 2014.2, utilizando o kit de desenvolvimento ZedBoard e o frontend AD-FMCOMMS1-EBZ. O correto funcionamento dos módulos implementados em hardware foi posteriormente avaliado através de uma interface entre o MATLAB e a Zed- Board, sendo que, os resultados obtidos no modelo em MATLAB serviram como termo de comparação. Através da utilização desta interface é possível validar parte do modem implementado em FPGA, mantendo o restante processamento a ser realizado em MATLAB, validando assim os módulos em FPGA de uma forma isolada.

Prototipo di modem basato su standard LoRa

La tesi si suddivide in due parti. Nella prima parte vengono spiegati trasmettitore e ricevitore basati su standard LoRa, con particolare attenzione alle fasi di modulazione/ demodulazione, sincronismo e correzione della frequenza portante. Nella seconda parte si cerca di implementare il sistema discusso tramite due dispositivi programmati attraverso Matlab.

Perfezionamento di un Modem basato sulla Modulazione OFDM

Questo elaborato ha lo scopo di provare a migliore un sistema di trasmissione e ricezione basato sulla modulazione OFDM, e andando ad ottimizzare e aggiungere alcuni blocchi allo schema originario. Questo tipo di modulazione prevede l’utilizzo di più sottoportanti, che ci permette di avere un’ottimizzazione dell’efficienza di banda. Per fare ciò ci siamo serviti di due dispositivi accademici molto utili in queste applicazioni, in quanto si possono programmare via software senza dover modificare l’hardware.

As danças do sagrado no profano : transpondo tempos e espaços em rituais de candomble

Universidade Estadual de Campinas. Faculdade de Educação Física

O universo desportivo de cegos e deficientes visuais : uma interpretação

Universidade Estadual de Campinas . Faculdade de Educação Física

A ginastica geral na sociedade contemporanea : pespectivas para a Educação Fisica escolar

Universidade Estadual de Campinas. Faculdade de Educação Física

From ""Geography of Accumulation"" to ""Geography of Reproduction"": a dialogue with Harvey

This article aims to discuss the space, revealing its powerful in the comprehension of modem world, from the thesis which the geographic space consists itself as condition, medium and product of society reproduction in its totality, evolving several temporal-spatial scales and several levels of reality, that should prolong Marx's work, having in view the construction of a ""social theory of space"" in the sense of a radical critical geography. This argumentation allows to understand, in the limits of geography, the passage of the notion ""production of space"" as condition of the accumulation of capital to the notion ""production of space"" as condition of present reproduction in front of the accumulation crisis. As a starting point, a discussion about some David Harvey's works, who supports the thesis that accumulation crisis of capital would be solved, in the modem world, through the spatial fix.

The city of Maringa, PR. The initial plan and the "urban requalifications"

The city of Maringa, located in the Northwest of Parana State, Brazil, was part of an extensive area colonized by the Companhia de Terras Norte do Parana replaced by the Companhia Melhoramentos Norte do Parana. Starting from a modem project elaborated in midlles of 1940's, Maringa emerged quickly amid the forest. We analyzed the initial plan, the projects for the reformulation of the central area and the tendencies of the public actions in the urban area that turn for real estate promotion and disrespect the popular participation. In its regional scale, Maringa follows the same orientation of cities that are used by the The obsession for the modernity takes to the systematic construction of new spaces that substitute the memory and the urban history in projects that reconduct to the aestheticization and the spectacularization of the urban landscape of Maringa.

Neoformation of micas in soils surrounding an alkaline-saline lake of Pantanal wetland, Brazil

The mineralogy and origin of micas were investigated in incipient soils surrounding a modem alkaline-saline lake of Nhecolandia, a sub-region of Pantanal wetland. Soils were sampled along a toposequence and analyzed by XRD, TEM-EDS, and ICP-MS. The studied micas, mainly concentrated in a green horizon, are dioctahedral, strongly associated with Fe(3+) and Al, and interstratified with smectite layers. Classification of individual crystals shows that glauconite and Fe-illite are the dominant micas, but one crystal of illite was recognized. Si-rich amorphous materials are associated with small crystallites in the mica-enriched horizon. A recent study shows that water samples from the studied lake and the surrounding water table have high pH, negative Eh, temperatures up to 40 C. high concentration of K. and low concentration of Si(OH)(4). Experimental studies of micas synthesis reported in the literature show that similar water conditions allow for dioctahedral mica crystallization from initial precipitation of amorphous hydroxides. Therefore, water characteristics combined with presence of Si-rich amorphous materials in the mica-enriched horizon suggest that the micas of the study area are neoformed. The alternated origin of illite, glauconite, and Fe-illite mixed-layer minerals probably occurs due to seasonal variations of pH. temperature, and chemical composition of waters in microenvironments, since the changes at this scale are possibly faster and more extreme. (C) 2010 Elsevier B.V. All rights reserved.

Re-dating mid-Holocene betelnut (Areca catechu L.) and other plant use at Dongan, Papua New Guinea

Direct accelerator mass spectrometry (AMS) dating of anaerobically preserved plant remains from the Dongan site in New Guinea, combined with assessment of preservation condition, confirms earlier doubts about the antiquity of betel-nut (Areca catechu L.) found at the site. A possible sago leaf fragment is also identified as a modem contaminant. The mid-Holocene age of other fruit and nut remains is verified using these methods. The utility of AMS dating in combination with detailed archaeobotanical assessment is demonstrated, thus improving chronometric hygiene and with it knowledge of past plant use in Oceania.

A Dynamical Modeling to Study the Adaptive Immune System and the Influence of Antibodies in the Immune Memory

Immunological systems have been an abundant inspiration to contemporary computer scientists. Problem solving strategies, stemming from known immune system phenomena, have been successfully applied to chall enging problems of modem computing. Simulation systems and mathematical modeling are also beginning use to answer more complex immunological questions as immune memory process and duration of vaccines, where the regulation mechanisms are not still known sufficiently (Lundegaard, Lund, Kesmir, Brunak, Nielsen, 2007). In this article we studied in machina a approach to simulate the process of antigenic mutation and its implications for the process of memory. Our results have suggested that the durability of the immune memory is affected by the process of antigenic mutation.and by populations of soluble antibodies in the blood. The results also strongly suggest that the decrease of the production of antibodies favors the global maintenance of immune memory.

Fossil trees in ancient fluvial channel deposits: evidence of seasonal and longer-term climatic variability

It has been established that large numbers of certain trees can survive in the beds of rivers of northeastern Australia where a strongly seasonal distribution of precipitation causes extreme variations in flow on both a yearly and longer-term basis. In these rivers, minimal flow occurs throughout much of any year and for periods of up to several years, allowing the trees to become established and to adapt their form in order to facilitate their survival in environments that experience periodic inundation by fast-flowing, debris-laden water. Such trees (notably paperbark trees of the angiosperm genus Melaleuca) adopt a reclined to prostrate, downstream-trailing habit, have a multiple-stemmed form, modified crown with weeping foliage, development of thick, spongy bark, anchoring of roots into firm to lithified substrates beneath the channel floor, root regeneration, and develop in flow-parallel, linear groves. Individuals from within flow-parallel, linear groves are preserved in situ within the alluvial deposit of the river following burial and death. Four examples of in situ tree fossils within alluvial channel deposits in the Permian of eastern Australia demonstrate that specialised riverbed plant communities also existed at times in the geological past. These examples, from the Lower Permian Carmila Beds, Upper Permian Moranbah Coal Measures and Baralaba Coal Measures of central Queensland and the Upper Permian Newcastle Coal Measures of central New South Wales, show several of the characteristics of trees described from modern rivers in northeastern Australia, including preservation in closely-spaced groups. These properties, together with independent sedimentological evidence, suggest that the Permian trees were adapted to an environment affected by highly variable runoff, albeit in a more temperate climatic situation than the modem Australian examples. It is proposed that occurrences of fossil trees preserved in situ within alluvial channel deposits may be diagnostic of environments controlled by seasonal and longer-term variability in fluvial runoff, and hence may have value in interpreting aspects of palaeoclimate from ancient alluvial successions. (C) 2001 Elsevier Science B.V. All rights reserved.

James Parkinson (1755-1824): A pioneer of child care

James Parkinson (1755-1824) of Parkinson's disease, is well recognized as a pioneer of clinical neurology; and is even more famous as a founder of modem palaeontology. We have reviewed from primary sources his extensive contributions to clinical child care and his pioneering advocacy for child welfare, protection and safety. His writings, outreach and advocacy for children's health characterizes him as one whose influence was an important springboard from which evolved the modern specialty of paediatrics. Parkinson was one of the first to write on child-rearing practices and in this context antedated Benjamin Spock by 150 years. Parkinson was a pioneer of child safety and the prevention of childhood trauma. He wrote of the resuscitation of near-drowned children and of first aid for injured children. This critical analysis reviews his pioneering description of child abuse and the development of post-abuse hydrocephalus. He wrote the datum description (in English) of the pathophysiology and pathology of appendicitis in children, of fatal rabies in children and highlighted the risk of death even when the biting dog was not clinically rabid. His advocacy for social reform for children's welfare was courageous and pioneering. James Parkinson, hitherto unacknowledged, was a significant founder of the evolving discipline of paediatrics and child health.

The geochemistry of late Archaean microbial carbonate: Implications for ocean chemistry and continental erosion history

Trace element concentrations and combined Sr- and Nd-isotope compositions were determined on stromatolitic carbonates (microbialites) from the 2.52 Ga Campbellrand carbonate platform (South Africa). Shale-normalised rare earth element and yttrium patterns of the ancient samples are similar to those of modern seawater in having positive La and Y anomalies and in being depleted in light rare earth elements. In contrast to modem seawater (and microbialite proxies), the 2.52 Ga samples lack a negative Ce anomaly but possess a positive Eu anomaly. These latter trace element characteristics are interpreted to reflect anoxic deep ocean waters where, unlike today, hydrothermal Fe input was not oxidised, and scavenged and rare earth elements were not coprecipitated with Fe-oxyhydroxides. The persistence of a positive Eu anomaly in relatively shallow Campbellrand platform waters indicates a dramatic reversal from hydrothermally dominated (Archaean) to continental erosion-dominated (Phanerozoic) rare earth element flux ratio. The dominant hydrothermal input is also expressed in the initial Sr- and Nd-isotope ratios. There is collinear variation in Sr-Nd systematics, which range from primitive values (Sr-87/Sr-86 of 0.702386 and epsilon (Nd) of +2.1) to more evolved crustal ratios. Mixing calculations show that the range in trace element ratios (e.g., Y/Ho) and initial isotope ratios is not a result of contamination by trapped sediment, but that the chemical band isotopic variation reflects carbonate deposition in an environment where different water masses mixed. Calculated Nd flux ratios yield a hydrothermal input into the 2.52 Ga oceans one order of magnitude larger than continental input. Such a change in flux ratio most likely required substantially reduced continental inputs, which could, in turn, reflect a plate tectonic causation (e.g., reduced topography or expansion of epicontinental seas). Copyright (C) 2001 Elsevier Science Ltd.