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Evaluating a publish/subscribe proxy for HTTPZhang, Yuanhui January 2013 (has links)
With the increasingly high speed of the Internet and its wide spread usage, the current Internet architecture exhibits some problems. The publish/subscribe paradigm has been developed to support one of the most common patterns of communication. It makes “information” the center of communication and removes the “location-identity split” (i.e., that objects are at specific locations to which you must communicate with to access the object). In this thesis project a publish/subscribe network is built and then used in the design, implementation, and evaluation of a publish/subscribe proxy for today’s HTTP based communication. By using this proxy users are able to use their existing web browser to send both HTTP requests and Publish/Subscribe Internet Routing Paradigm (PSIRP) requests. A publish/subscribe overlay is responsible for maintaining PSIRP contents. The proxy enables web browser clients to benefit from the publish/subscribe network, without requiring them to change their behavior or even be aware of the fact that the content that they want to access is being provided via the publish/subscribe overlay. The use of the overlay enables a user’s request to be satisfied by any copy of the content, potentially decreasing latency, reducing backbone network traffic, and reducing the load on the original content server. One of the aims of this thesis is to make more PSIRP content available, this is done by introducing a proxy who handles both HTTP and PSIRP requests, but having received content as a result of an HTTP response it publishes this data as PSIRP accessible content. The purpose is to foster the introduction and spread of content based access. / Med allt högre Internetshastighet och dess utbredda användning, uppvisar den aktuella Internet-arkitekturen vissa problem. Publicera / prenumerera paradigm har utvecklats för att stödja en av de vanligaste mönstren för kommunikation. Det gör att "information" blir centrum av kommunikation och tar bort "plats-identitet split" (dvs att objekten är på specifika platser som du måste kommunicera med för att komma åt objektet). i detta examensarbete byggs ett publicera / prenumerera nätverk och sedan används i utformningen, genomförandet, och utvärdering av en publicera / prenumerera proxy för dagens HTTP-baserad kommunikation. Genom att använda denna proxy kan användare kan använda sin befintliga webbläsare för att skicka både HTTP-förfrågningar och publicera / Prenumerera Internet Routing Paradigm (PSIRP) begäran. En publicera / prenumerera överlagring är ansvarig för att upprätthålla innehåll av PSIRP. Fullmakten gör det möjligt för klienter av webbläsare att dra nytta av publicera / prenumerera nätverket, utan att kräva dem att ändra sitt beteende eller ens vara medvetna om det faktum att det innehållet som de vill komma åt tillhandahålls via publicera / prenumerera överlägg. Användningen av överlägget kan en användare begäran som skall uppfyllas av en kopia av innehållet, eventuellt minskande latens, vilket minskar trafiken stamnät, och minska belastningen på det ursprungliga innehållet servern. Ett av syftena med denna uppsats är att göra mer PSIRP innehåll tillgängligt och detta görs genom att införa en proxy som hanterar både HTTP och PSIRP förfrågningar, men har fått innehåll som en följd av en HTTP-svar offentliggörs denna data som PSIRP tillgängligt innehåll. Syftet är att främja införandet och innehållbaserade åtkomsten.
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Sítios arqueológicos de naufrágios da Baía de Todos os Santos, Salvador-BA : estudo de caso do Clipper Blackadder / Archaeological sites of shipwreck at the Baía de Todos os Santos (all saints bay), Salvador, BA – BR : case study from the Clipper BlackadderGusmão, Daniel Martins 17 April 2015 (has links)
With a coast of approximately 8.500 km of extension, Brazil possesses a maritime scenario of
great archaeological potency, formed mainly by rests of shipwrecks, port structures, maritime
religiosity spaces, the sanctuary sites, and the depository sites. In the last twenty years of
scientifically archaeological research, we entered in an innovative reality proposal that intends
to encompass the many varied dimensions of human interaction with the aquatic environment,
through the analyses of the multiple social and material expressions arising from this
perception, be it from the nautical, maritime, or underwater segment corroborating in an
Archaeology of Aquatic Environment. In the intent to evaluate the development and the
perspective of this research field in Brazil, our dissertation has as one of its goals to do a
approach of archaeological sites formed by rests of shipwrecks at the All Saints Bay - Bahia,
relating historical, technical, nautical and social archaeological arising from this types of sites,
by means of a inventory liability until reaching the research in situ from the rests of the
clipper Blackadder. To this end we land in Public Archaeology, approaching segments of
society to better understand the importance and meaning of shipwrecks archaeological sites as
an integral part of the Underwater Brazilian Cultural Heritage. / Com um litoral de aproximadamente 8.500 km de extensão, o Brasil apresenta um cenário
marítimo de grande potencial arqueológico, formado principalmente por restos de
embarcações naufragadas, estruturas portuárias, espaços de religiosidade marítima, sítios
santuários, e sítios depositários. Nesses últimos 20 anos de pesquisas arqueológicas
científicas, ingressamos numa realidade de proposta inovadora que visa englobar as mais
variadas vertentes da interação do ser humano com o ambiente aquático, através da análise
das múltiplas expressões materiais e sociais advindas desta percepção, seja ela do segmento
marítimo, náutico ou subaquático corroborando numa Arqueologia de Ambientes Aquáticos.
No intuito de avaliar o desenvolvimento e as perspectivas deste campo de pesquisa no Brasil,
nossa dissertação tem como um dos objetivos desenvolver uma abordagem de sítios
arqueológicos formados por restos de embarcações naufragadas na Baía de Todos os Santos,
Salvador - BA, relacionando informações históricas, técnicas, náuticas e sociais advindas
desses tipos de sítios, por meio de um inventário passivo até alcançar a pesquisa in situ dos
restos do clipper Blackadder. Nessa perspectiva, nos aportamos na Arqueologia Pública,
aproximando segmentos da sociedade para melhor compreender a importância e significância
dos sítios arqueológicos de naufrágios como um elemento integrante do patrimônio cultural
subaquático brasileiro.
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