Browsing by Issue Date, starting with "2018-06-05"
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- Do ovo ao pintoPublication . Almeida, Cátia Alexandra Girão; Conceição, Maria Antónia Pereira daResumo: Este estágio teve como objetivo conhecer o processo global da atividade de um Centro de Incubação (CI) assim como a atividade geral da Empresa Lusiaves, com especial relevo para os procedimentos, as normas de biossegurança e medidas de controlo interno. Para tal, acompanhou-se o fluxo da entrada do ovo fértil até ao nascimento do pinto, ou seja, desde a chegada dos ovos para armazém até à eclosão. Acompanhou-se o desenvolvimento embrionário do pinto em todas as fases, avaliou-se a qualidade do pinto nascido e participou-se nos processos de vacinação efetuados no CI: aplicação da vacina "in ovo" e vacina em spray do pinto. O trabalho prático consistiu concretamente na quantificação da perda de água durante o desenvolvimento embrionário. Para tal, procedeu-se à pesagem de ovos, embriodiagnósticos e pesagem de pintos, bem como avaliação do pinto recém-nascido. Esse trabalho permitiu verificar o correto funcionamento das máquinas. Palavra-chave: desenvolvimento embrionário do pinto, qualidade, centro de incubação From egg to chick Abstract: This aims to know the overall process of the activity of an Incubation Center (IC) as a general activity of the Lusiaves, with special emphasis on procedures such as biosafety norms and internal control measures. For this, follow the inflow of the fertile egg until the birth of the chick, that is, from the arrival of the eggs to the warehouse until the hatching. Embryonic development of the chick was monitored in all phases, the quality of the chick was evaluated and the participation in the vaccination processes was carried out on IC: application of the vaccine "in ovo" and chick spray vaccine. The practical work consisted in the quantification of the loss of water during the embryonic development. For this, we performed egg weighing, embryodiagnosis and chick weighing, as well as evaluation of the newborn chick. This work allowed verifying the correct functioning of the machines. Key words: embryonic development of chicken, quality, incubation center
- A polícia de segurança pública em cenários de crise: reflexão sobre as capacidades policiais em situações de contingênciaPublication . Ferreira, Adélia Alexandre Duarte; Elias, Luís Manuel AndréUma instituição preparada para cenários que extravasem os recursos utilizados diariamente, com planeamentos que prevejam situações que vão além daqueles que ocorrem com mais frequência, é uma instituição capaz de dar resposta num cenário crítico de forma mais eficaz e eficiente, sendo maior a probabilidade de sucesso na resolução desse tipo de ocorrências. Na definição do conceito de crise, deparamo-nos com a complexidade e abrangência do mesmo. Referindo-nos apenas a quatro grandes dimensões de crise, nomeadamente Estado de Sítio e Estado de Emergência, Catástrofes e Acidentes Graves, Incidentes Tático- Policiais e Ciberataques, dimensões de crise que à partida parecem diferentes mas com muitos aspetos em comum, além do enquadramento teórico destas dimensões de crise. No desenvolvimento do presente trabalho tentamos apurar se a Polícia de Segurança Pública está apta para atuar num destes cenários que possam vir a acontecer, e que Portugal não está isento de vir a sofrer, mesmo que não existam, até ao momento, experiências com alguns dos cenários críticos apresentados no nosso país, como é o caso de situações de Estado de Sítio, mas que nada impede que aconteçam. No presente trabalho são elencados os meios humanos e materiais que a PSP tem à sua disposição para utilizar numa dessas situações, é explorado o tipo de formação e treinos existentes nesse âmbito, bem como o tipo de planeamentos existentes na Polícia, tudo de modo a aferir a capacidade de atuação da PSP nesses cenários de crise, caso um deles efetivamente ocorra.
- Pathophysiological Mechanisms of Chronic Venous Disease and Implications for Venoactive Drug TherapyPublication . Mansilha, A; Sousa, JChronic venous disease (CVD) is a common pathology, with significant physical and psychological impacts for patients and high economic costs for national healthcare systems. Throughout the last decades, several risk factors for this condition have been identified, but only recently, have the roles of inflammation and endothelial dysfunction been properly assessed. Although still incompletely understood, current knowledge of the pathophysiological mechanisms of CVD reveals several potential targets and strategies for therapeutic intervention, some of which are addressable by currently available venoactive drugs. The roles of these drugs in the clinical improvement of venous tone and contractility, reduction of edema and inflammation, as well as in improved microcirculation and venous ulcer healing have been studied extensively, with favorable results reported in the literature. Here, we aim to review these pathophysiological mechanisms and their implications regarding currently available venoactive drug therapies.
- Medicamentos LASA e Medicamentos ALTO RISCOPublication . Pereira, Nélia
- Search for long-lived charginos based on a disappearing-track signature in pp collisions at $ \sqrt{s}=13 $ TeV with the ATLAS detectorPublication . ATLAS collaboration (2874 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, HelmutThis paper presents a search for direct electroweak gaugino or gluino pair production with a chargino nearly mass-degenerate with a stable neutralino. It is based on an integrated luminosity of 36.1 fb$^{−1}$ of pp collisions at $ \sqrt{s}=13 $ TeV collected by the ATLAS experiment at the LHC. The final state of interest is a disappearing track accompanied by at least one jet with high transverse momentum from initial-state radiation or by four jets from the gluino decay chain. The use of short track segments reconstructed from the innermost tracking layers significantly improves the sensitivity to short chargino lifetimes. The results are found to be consistent with Standard Model predictions. Exclusion limits are set at 95% confidence level on the mass of charginos and gluinos for different chargino lifetimes. For a pure wino with a lifetime of about 0.2 ns, chargino masses up to 460 GeV are excluded. For the strong production channel, gluino masses up to 1.65 TeV are excluded assuming a chargino mass of 460 GeV and lifetime of 0.2 ns.
- Search for dark matter in events with energetic, hadronically decaying top quarks and missing transverse momentum at $ \sqrt{s}=13 $ TeVPublication . CMS collaboration (2261 authors); Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, Agostino; Faccioli, Pietro; Galinhas, Bruno; Gallinaro, Michele; Hollar, Jonathan; Leonardo, Nuno; Lloret Iglesias, Lara; Seixas, Joao; Strong, Giles; Toldaiev, Oleksii; Vadruccio, Daniele; Varela, Joao; Vischia, Pietro; David Tinoco Mendes, Andre; Silva, Pedro; Musella, PasqualeA search for dark matter is conducted in events with large missing transverse momentum and a hadronically decaying, Lorentz-boosted top quark. This study is performed using proton-proton collisions at a center-of-mass energy of 13 TeV, in data recorded by the CMS detector in 2016 at the LHC, corresponding to an integrated luminosity of 36 fb$^{-1}$. New substructure techniques, including the novel use of energy correlation functions, are utilized to identify the decay products of the top quark. With no significant deviations observed from predictions of the standard model, limits are placed on the production of new heavy bosons coupling to dark matter particles. For a scenario with purely vector-like or purely axial-vector-like flavor changing neutral currents, mediator masses between 0.20 and 1.75 TeV are excluded at 95% confidence level, given a sufficiently small dark matter mass. Scalar resonances decaying into a top quark and a dark matter fermion are excluded for masses below 3.4 TeV, assuming a dark matter mass of 100 GeV.
- Observation of $\mathrm{t\overline{t}}$H productionPublication . CMS collaboration (2301 authors); Nayak, Aruna; Araujo, Mariana; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, Agostino; Faccioli, Pietro; Galinhas, Bruno; Gallinaro, Michele; Hollar, Jonathan; Leonardo, Nuno; Seixas, Joao; Strong, Giles; Toldaiev, Oleksii; Vadruccio, Daniele; Varela, Joao; Vischia, Pietro; David Tinoco Mendes, Andre; Silva, Pedro; Musella, PasqualeThe observation of Higgs boson production in association with a top quark-antiquark pair is reported, based on a combined analysis of proton-proton collision data at center-of-mass energies of s=7, 8, and 13 TeV, corresponding to integrated luminosities of up to 5.1, 19.7, and 35.9 fb-1, respectively. The data were collected with the CMS detector at the CERN LHC. The results of statistically independent searches for Higgs bosons produced in conjunction with a top quark-antiquark pair and decaying to pairs of W bosons, Z bosons, photons, τ leptons, or bottom quark jets are combined to maximize sensitivity. An excess of events is observed, with a significance of 5.2 standard deviations, over the expectation from the background-only hypothesis. The corresponding expected significance from the standard model for a Higgs boson mass of 125.09 GeV is 4.2 standard deviations. The combined best fit signal strength normalized to the standard model prediction is 1.26-0.26+0.31.
- Search for single production of vector-like quarks decaying to a b quark and a Higgs bosonPublication . CMS collaboration (2283 authors); Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, Agostino; Faccioli, Pietro; Galinhas, Bruno; Gallinaro, Michele; Hollar, Jonathan; Leonardo, Nuno; Lloret Iglesias, Lara; Seixas, Joao; Strong, Giles; Toldaiev, Oleksii; Vadruccio, Daniele; Varela, Joao; Vischia, Pietro; David Tinoco Mendes, Andre; Silva, Pedro; Musella, PasqualeA search is presented for single production of heavy vector-like quarks (B) that decay to a Higgs boson and a b quark, with the Higgs boson decaying to a highly boosted $ \mathrm{b}\overline{\mathrm{b}} $ pair reconstructed as a single collimated jet. The analysis is based on data collected by the CMS experiment in proton-proton collisions at $ \sqrt{s}=13 $ TeV, corresponding to an integrated luminosity of 35.9 fb$^{−1}$. The data are consistent with background expectations, and upper limits at 95% confidence level on the product of the B quark cross section and the branching fraction are obtained in the range 1.28–0.07 pb, for a narrow B quark with a mass between 700 and 1800 GeV. The production of B quarks with widths of 10, 20 and 30% of the resonance mass is also considered, and the sensitivities obtained are similar to those achieved in the narrow width case. This is the first search at the CERN LHC for the single production of a B quark through its fully hadronic decay channel, and the first study considering finite resonance widths of the B quark.