Browsing by Issue Date, starting with "2015-04-11"
Now showing 1 - 3 of 3
Results Per Page
Sort Options
- A formação contínua de professores : uma leitura do decreto-lei 22/2014Publication . Casanova, Maria PrazeresNum mundo em permanente mutação a formação contínua de professores surge como o meio de aquisição de conhecimentos e de capacidades para agir no contexto educativo, visando o seu desenvolvimento profissional e organizacional. O processo de aprendizagem está em íntima consonância com a motivação para aprender mais e melhor. Os professores terão que sentir e estar no centro da sua própria formação por desejo, por vontade ou por necessidade. Os agrupamentos de escolas e as escolas não agrupadas (doravante designados por escolas) poderão potenciar os seus próprios recursos humanos na produção de respostas formativas de qualidade de modo a colmatar as necessidades formativas identificadas em contexto.
- The COMPASS Setup for Physics with Hadron BeamsPublication . COMPASS collaboration (232 authors); Bordalo, P.; Franco, C.; Nunes, Ana Sofia; Pires, C.; Quaresma, M.; Quintans, C.; Ramos, S.; Silva, L.; Stolarski, M.The main characteristics of the COMPASS experimental setup for physics with hadron beams are described. This setup was designed to perform exclusive measurements of processes with several charged and/or neutral particles in the final state. Making use of a large part of the apparatus that was previously built for spin structure studies with a muon beam, it also features a new target system as well as new or upgraded detectors. The hadron setup is able to operate at the high incident hadron flux available at CERN. It is characterised by large angular and momentum coverages, large and nearly flat acceptances, and good two and three-particle mass resolutions. In 2008 and 2009 it was successfully used with positive and negative hadron beams and with liquid hydrogen and solid nuclear targets. This paper describes the new and upgraded detectors and auxiliary equipment, outlines the reconstruction procedures used, and summarises the general performance of the setup.
- Search for Decays of Stopped Long-Lived Particles Produced in Proton–Proton Collisions at $\sqrt{s}= 8\,\text {TeV} $Publication . CMS collaboration (2126 authors); Hollar, Jonathan; Nayak, Aruna; Bargassa, Pedrame; Beirão Da Cruz E Silva, Cristóvão; Faccioli, Pietro; Ferreira Parracho, Pedro Guilherme; Gallinaro, Michele; Lloret Iglesias, Lara; Nguyen, Federico; Rodrigues Antunes, Joao; Seixas, Joao; Varela, Joao; Vischia, Pietro; David Tinoco Mendes, Andre; Silva, Pedro; Musella, Pasquale; Pela, Joao; Leonardo, NunoA search has been performed for long-lived particles that could have come to rest within the CMS detector, using the time intervals between LHC beam crossings. The existence of such particles could be deduced from observation of their decays via energy deposits in the CMS calorimeter appearing at times that are well separated from any proton–proton collisions. Using a data set corresponding to an integrated luminosity of 18.6 $\,\text {fb}^\text {-1}$ of 8 $\,\text {TeV}$ proton–proton collisions, and a search interval corresponding to 281 h of trigger livetime, 10 events are observed, with a background prediction of $13.2^{+3.6-2.5}$ events. Limits are presented at 95 % confidence level on gluino and top squark production, for over 13 orders of magnitude in the mean proper lifetime of the stopped particle. Assuming a cloud model of R-hadron interactions, a gluino with mass $\lesssim $ 1000 $\,\text {GeV}$ and a top squark with mass $\lesssim $ 525 $\,\text {GeV}$ are excluded, for lifetimes between 1 $\upmu $ s and 1000 $\text {s}$ . These results are the most stringent constraints on stopped particles to date.