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Browsing by Issue Date, starting with "2017-05-08"

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  • 2017-05-08Master thesis Open access Show more
  • 2017-05-08Master thesis Open access Show more
  • O impacto das relações com clientes na inovação dos serviços. Estudo de caso: Banco BFA- Banco de Fomento Angola
    Publication . Santos, Carina Vissénia Lourenço dos; Rosado, David
    A evolução tecnológica tem alterado a forma de relacionamento com os clientes, provocando um grande impacto no setor bancário. Perante este cenário de aumento da concorrência neste setor, a Banca tem introduzido novas tecnologias como forma de distinção num mercado cada vez mais competitivo. Nos últimos anos, a inovação tem originado no meio empresarial uma atenção crescente, pois tem vindo a assumir-se como um fator determinante para o sucesso das empresas. Deste modo pretendeu-se analisar neste trabalho se os clientes apresentam algum impacto na inovação dos serviços, neste caso específico, o banco BFA. O estudo teve uma revisão de literatura sobre o marketing, destacando-se marketing de serviços e o marketing relacional. Seguidamente analisou-se a inovação. Posteriormente, foi efetuado um estudo empírico, sendo formuladas quatro perguntas de investigação que se pretendiam responder. Foram ainda inquiridos 32 clientes do BFA, residentes em Lisboa, havendo ainda uma entrevista ao Coordenador de Marketing do BFA.
    2017-05-08Master thesis Restricted access Show more
  • Measurements of top-quark pair differential cross-sections in the $e\mu$ channel in $pp$ collisions at $\sqrt{s} = 13$ TeV using the ATLAS detector
    Publication . ATLAS collaboration (2856 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, Helmut
    This article presents measurements of $t\bar{t}$ differential cross-sections in a fiducial phase-space region, using an integrated luminosity of 3.2 fb$^{-1}$ of proton–proton data at a centre-of-mass energy of $\sqrt{s} = 13$  TeV recorded by the ATLAS experiment at the LHC in 2015. Differential cross-sections are measured as a function of the transverse momentum and absolute rapidity of the top quark, and of the transverse momentum, absolute rapidity and invariant mass of the $t\bar{t}$ system. The $t\bar{t}$ events are selected by requiring one electron and one muon of opposite electric charge, and at least two jets, one of which must be tagged as containing a b-hadron. The measured differential cross-sections are compared to predictions of next-to-leading order generators matched to parton showers and the measurements are found to be consistent with all models within the experimental uncertainties with the exception of the Powheg-Box $+$ Herwig++ predictions, which differ significantly from the data in both the transverse momentum of the top quark and the mass of the $t\bar{t}$ system.
    2017-05-08Journal article Open access Show more
  • A search for new phenomena in pp collisions at $\sqrt{s} = 13\,\text {TeV} $ in final states with missing transverse momentum and at least one jet using the $\alpha _{\mathrm {T}}$ variable
    Publication . CMS collaboration (2286 authors); Calpas, Betty; Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Di Francesco, Agostino; Faccioli, Pietro; Ferreira Parracho, Pedro Guilherme; Gallinaro, Michele; Hollar, Jonathan; Leonardo, Nuno; Lloret Iglesias, Lara; Rodrigues Antunes, Joao; Seixas, Joao; Toldaiev, Oleksii; Vadruccio, Daniele; Varela, Joao; Vischia, Pietro; David Tinoco Mendes, Andre; Silva, Pedro; Musella, Pasquale; Pela, Joao
    A search for new phenomena is performed in final states containing one or more jets and an imbalance in transverse momentum in pp collisions at a centre-of-mass energy of 13 $\,\text {TeV}$ . The analysed data sample, recorded with the CMS detector at the CERN LHC, corresponds to an integrated luminosity of 2.3 $\,\text {fb}^{-1}$ . Several kinematic variables are employed to suppress the dominant background, multijet production, as well as to discriminate between other standard model and new physics processes. The search provides sensitivity to a broad range of new-physics models that yield a stable weakly interacting massive particle. The number of observed candidate events is found to agree with the expected contributions from standard model processes, and the result is interpreted in the mass parameter space of fourteen simplified supersymmetric models that assume the pair production of gluinos or squarks and a range of decay modes. For models that assume gluino pair production, masses up to 1575 and 975 $\,\text {GeV}$ are excluded for gluinos and neutralinos, respectively. For models involving the pair production of top squarks and compressed mass spectra, top squark masses up to 400 $\,\text {GeV}$ are excluded.
    2017-05-08Journal article Open access Show more