Browsing by Issue Date, starting with "2017-09-19"
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- Esquisso: Linguagem Criativa da ArquitecturaPublication . Cardoso, Ana; Guimarães, José LuísA pertinência do esquisso na concretização de ideias é plasmada nas primeiras reflexões e percepções. Este integra uma componente abstracta, que vincula uma intenção pragmática e poética com o próprio conceito. É um espelho das passagens do pensamento inserido num contexto conceptual, que, muitas vezes, não é explícito. Traduz dialéctica consciente entre a incerteza do saber e a expectativa, que pode desabrochar no conceito de arquitectura sobre o qual o arquitecto se apoia, numa visão retroactiva. Transmite e clarifica, subtilmente, para o suporte material, visões, objectivos e intenções, criando e recriando um momento pessoal e único do arquitecto aquando da absorção da energia do espaço. Há uma vontade intrínseca de traçar o que os nossos olhos veem, e nesse momento o cérebro anseia por identificar-se com o mundo e com a linha marcada. A aptidão de conseguir elucidar a realidade exterior ou imaginada num só desenho de índole abstracta, é uma fonte de prazer e desenvolvimento quer intelectual, quer artística. O esquisso, enquanto elo de ligação e elemento ordenador do pensamento no contexto arquitectónico, explora as possibilidades de transformar uma visão ou memória alheia numa realidade funcional e futura, satisfazendo como ferramenta nesta busca incessante pela elucidação da realidade exterior. Através da revisão literária e da análise documental à diversa obra gráfica do arquitecto Eduardo Souto de Moura, procura-se reflectir, nesta dissertação, sobre a importância do esquisso no processo criativo e das suas faculdades enquanto catalisador da expressão artística e arquitectónica. A presente investigação argumenta que o esquisso se assume como recurso essencial metodológico para a arquitectura, uma alavanca impulsionadora do acto criativo que contribui como potencial de qualidades expansíveis e transformadoras da visão arquitectónica, materializando o que existe além do olhar tangível e da mente, e potencializando a visão e espírito crítico do arquitecto face ao mundo que o rodeia.
- Child-driven design of milk micelles for drug deliveryPublication . Fernandes, T.; Aguiar, J.; Scheppe, S.; Pinto, J. F.; Fernandes, A. I.
- Calibration of the SNO+ experimentPublication . Maneira, J.; Falk, E.; Leming, E.; Peeters, S.The main goal of the SNO+ experiment is to perform a low-background and high-isotope-mass search for neutrinoless double-beta decay, employing 780 tonnes of liquid scintillator loaded with tellurium, in its initial phase at 0.5% by mass for a total mass of 1330 kg of (130)Te. The SNO+ physics program includes also measurements of geo- and reactor neutrinos, supernova and solar neutrinos. Calibrations are an essential component of the SNO+ data-taking and analysis plan. The achievement of the physics goals requires both an extensive and regular calibration. This serves several goals: the measurement of several detector parameters, the validation of the simulation model and the constraint of systematic uncertainties on the reconstruction and particle identification algorithms. SNO+ faces stringent radiopurity requirements which, in turn, largely determine the materials selection, sealing and overall design of both the sources and deployment systems. In fact, to avoid frequent access to the inner volume of the detector, several permanent optical calibration systems have been developed and installed outside that volume. At the same time, the calibration source internal deployment system was re-designed as a fully sealed system, with more stringent material selection, but following the same working principle as the system used in SNO. This poster described the overall SNO+ calibration strategy, discussed the several new and innovative sources, both optical and radioactive, and covered the developments on source deployment systems.
- Search for new phenomena in a lepton plus high jet multiplicity final state with the ATLAS experiment using $ \sqrt{s}=13 $ TeV proton-proton collision dataPublication . ATLAS collaboration (2860 authors); Aguilar-Saavedra, Juan Antonio; Amor Dos Santos, Susana Patricia; Anjos, Nuno; Araque, Juan Pedro; Carvalho, João; Castro, Nuno Filipe; Conde Muiño, Patricia; Da Cunha Sargedas De Sousa, Mario Jose; Fiolhais, Miguel; Galhardo, Bruno; Gomes, Agostinho; Gonçalo, Ricardo; Jorge, Pedro; Machado Miguens, Joana; Maio, Amélia; Maneira, José; Oleiro Seabra, Luis Filipe; Onofre, António; Pedro, Rute; Santos, Helena; Saraiva, João; Silva, José; Tavares Delgado, Ademar; Veloso, Filipe; Wolters, HelmutA search for new phenomena in final states characterized by high jet multiplicity, an isolated lepton (electron or muon) and either zero or at least three b-tagged jets is presented. The search uses 36.1 fb$^{−1}$ of $ \sqrt{s}=13 $ TeV proton-proton collision data collected by the ATLAS experiment at the Large Hadron Collider in 2015 and 2016. The dominant sources of background are estimated using parameterized extrapolations, based on observables at medium jet multiplicity, to predict the b-tagged jet multiplicity distribution at the higher jet multiplicities used in the search. No significant excess over the Standard Model expectation is observed and 95% confidence-level limits are extracted constraining four simplified models of R-parity-violating supersymmetry that feature either gluino or top-squark pair production. The exclusion limits reach as high as 2.1 TeV in gluino mass and 1.2 TeV in top-squark mass in the models considered. In addition, an upper limit is set on the cross-section for Standard Model $ t\overline{t}t\overline{t} $ production of 60 fb (6.5 × the Standard Model prediction) at 95% confidence level. Finally, model-independent limits are set on the contribution from new phenomena to the signal-region yields.
- Search for supersymmetry in final states with two same-sign or three leptons and jets using 36 fb$^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collision data with the ATLAS detectorPublication . ATLAS collaboration (2876 authors); Aguilar-Saavedra, Juan Antonio; Amor Dos Santos, Susana Patricia; Anjos, Nuno; Araque, Juan Pedro; Castro, Nuno Filipe; Conde Muiño, Patricia; Da Cunha Sargedas De Sousa, Mario Jose; Fiolhais, Miguel; Galhardo, Bruno; Gomes, Agostinho; Gonçalo, Ricardo; Jorge, Pedro; Machado Miguens, Joana; Maio, Amélia; Maneira, José; Oleiro Seabra, Luis Filipe; Onofre, António; Pedro, Rute; Santos, Helena; Saraiva, João; Silva, José; Tavares Delgado, Ademar; Veloso, Filipe; Wolters, HelmutA search for strongly produced supersymmetric particles using signatures involving multiple energetic jets and either two isolated same-sign leptons (e or μ), or at least three isolated leptons, is presented. The analysis relies on the identification of b-jets and high missing transverse momentum to achieve good sensitivity. A data sample of proton-proton collisions at $ \sqrt{s}=13 $ TeV recorded with the ATLAS detector at the Large Hadron Collider in 2015 and 2016, corresponding to a total integrated luminosity of 36.1 fb$^{−1}$, is used for the search. No significant excess over the Standard Model prediction is observed. The results are interpreted in several simplified supersymmetric models featuring R-parity conservation or R-parity violation, extending the exclusion limits from previous searches. In models considering gluino pair production, gluino masses are excluded up to 1.87 TeV at 95% confidence level. When bottom squarks are pair-produced and decay to a chargino and a top quark, models with bottom squark masses below 700 GeV and light neutralinos are excluded at 95% confidence level. In addition, model-independent limits are set on a possible contribution of new phenomena to the signal region yields.