Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in pp collisions at s =8TeV with the ATLAS detector

Many extensions of the Standard Model posit the existence of heavy particles with long lifetimes. This article presents the results of a search for events containing at least one long-lived particle that decays at a significant distance from its production point into two leptons or into five or more charged particles. This analysis uses a data sample of proton-proton collisions at s��� = 8 TeV corresponding to an integrated luminosity of 20.3 fb���1 collected in 2012 by the ATLAS detector operating at the Large Hadron Collider. No events are observed in any of the signal regions, and limits are set on model parameters within supersymmetric scenarios involving R-parity violation, split supersymmetry, and gauge mediation. In some of the search channels, the trigger and search strategy are based only on the decay products of individual long-lived particles, irrespective of the rest of the event. In these cases, the provided limits can easily be reinterpreted in different scenarios.

Search for Dark Matter in Events with Missing Transverse Momentum and a Higgs Boson Decaying to Two Photons in pp Collisions at root s=8 TeV with the ATLAS Detector

Results of a search for new phenomena in events with large missing transverse momentum and a Higgs boson decaying to two photons are reported. Data from proton--proton collisions at a center-of-mass energy of 8 TeV and corresponding to an integrated luminosity of 20.3 fb���1 have been collected with the ATLAS detector at the LHC. The observed data are well described by the expected Standard Model backgrounds. Upper limits on the cross section of events with large missing transverse momentum and a Higgs boson candidate are also placed. Exclusion limits are presented for models of physics beyond the Standard Model featuring dark-matter candidates.

Desenvolvimento de um Range Extender para Ve��culo El��trico

Disserta����o de mestrado integrado em Engenharia Eletr��nica Industrial e de Computadores

Cosm��ticos no Youtube: marcas vs youtubers: em estudo explorat��rio

Disserta����o de mestrado em Design de Comunica����o de Moda

Durabilidade de colagens estruturais em elementos de madeira

Disserta����o de mestrado integrado em Engenharia Civil

Biomimetic superhydrophobic surfaces patterned with wettable spots as implantable chips for in vivo high-content 3D biomaterials response assessment

"Tissue engineering: part A", vol. 21, suppl. 1 (2015)

Mostrar a ci��ncia: potenciar a divulga����o de investiga����o acad��mica na Internet atrav��s dos audiovisuais

Disserta����o de mestrado em Ci��ncias da Comunica����o (��rea de especializa����o em Audiovisual e Multim��dia)

Bioethanol production by Saccharomyces cerevisiae, Pichia stipitis and Zymomonas mobilis from delignified coconut fibre mature and lignin extraction according to biorefinery concept

In search to increase the offer of liquid, clean, renewable and sustainable energy in the world energy matrix, the use of lignocellulosic materials (LCMs) for bioethanol production arises as a valuable alternative. The objective of this work was to analyze and compare the performance of Saccharomyces cerevisiae, Pichia stipitis and Zymomonas mobilis in the production of bioethanol from coconut fibre mature (CFM) using different strategies: simultaneous saccharification and fermentation (SSF) and semi-simultaneous saccharification and fermentation (SSSF). The CFM was pretreated by hydrothermal pretreatment catalyzed with sodium hydroxide (HPCSH). The pretreated CFM was characterized by X-ray diffractometry and SEM, and the lignin recovered in the liquid phase by FTIR and TGA. After the HPCSH pretreatment (2.5% (v/v) sodium hydroxide at 180 ��C for 30 min), the cellulose content was 56.44%, while the hemicellulose and lignin were reduced 69.04% and 89.13%, respectively. Following pretreatment, the obtained cellulosic fraction was submitted to SSF and SSSF. Pichia stipitis allowed for the highest ethanol yield 90.18% in SSSF, 91.17% and 91.03% were obtained with Saccharomyces cerevisiae and Zymomonas mobilis, respectively. It may be concluded that the selection of the most efficient microorganism for the obtention of high bioethanol production yields from cellulose pretreated by HPCSH depends on the operational strategy used and this pretreatment is an interesting alternative for add value of coconut fibre mature compounds (lignin, phenolics) being in accordance with the biorefinery concept.

Imagem de destinos tur��sticos: um estudo sobre as publica����es brasileiras

Os estudos referentes ao turismo dedicam-se �� compreens��o de diferentes temas, sendo que um bastante analisado �� escala internacional �� a quest��o da imagem de um destino tur��stico. O interesse por este tema �� percebido em diversas ��reas do conhecimento, como a sociologia e o marketing. No Brasil, h�� diversos pesquisadores dedicando-se �� imagem dos destinos tur��sticos. Assim, buscando compreender de que forma este tema tem sido trabalhado no Brasil, este estudo de car��ter bibliogr��fico teve como objetivo analisar e compreender as publica����es sobre imagem de destinos tur��sticos em peri��dicos brasileiros, nos ��ltimos seis anos (2008-2014). A partir de um levantamento dos artigos publicados neste per��odo, usando como ferramenta de busca o site ���Publica����es de Turismo���, foram identificados vinte e oito artigos. A an��lise permitiu verificar que os estudos est��o concentrados na compreens��o da imagem de um determinado destino. Os artigos analisados s��o predominantemente estudos emp��ricos e h�� um equil��brio entre os de car��ter quantitativo e qualitativo. No que diz respeito �� bibliografia, foi poss��vel identificar que os autores brasileiros que t��m trabalhado com o tema de imagem de destinos, j�� buscam bibliografias internacionais para fundamentar os seus estudos. Tamb��m nos trabalhos sobre este tema, identificou-se uma maior maturidade dos autores no que diz respeito �� utiliza����o das ferramentas estat��sticas. Alguns estudos fazem uma an��lise aprofundada dos estudos internacionais e aplicam estas teorias no Brasil. Conclui-se que este tema tem sido estudado com maior profundidade no pa��s, se comparado com os temas como o da percep����o de residentes.

BIOMedical search engine framework: lightweight and customized implementation of domain-specific biomedical search engines

The Smart Drug Search is publicly accessible at http://sing.ei.uvigo.es/sds/. The BIOMedical Search Engine Framework is freely available for non-commercial use at https://github.com/agjacome/biomsef

Factors associated with the donation and non-donation of embryos for research: a systematic review

Background: Systematic knowledge on the factors that influence the decisions of IVF users regarding embryo donation for research is a core need for patient-centred policies and ethics in clinical practice. However, no systematic review has been provided on the motivations of patients who must decide embryo disposition. This paper fills this gap, presenting a systematic review of quantitative and qualitative studies, which synthesizes the current body of knowledge on the factors and reasons associated with IVF patients��� decisions to donate or not to donate embryos for research. Methods: A systematic search of studies indexed in PubMed, ISIWoK and PsycINFO, published before November 2013, was conducted. Only empirical, peer-reviewed, full-length, original studies reporting data on factors and reasons associated with the decision concerning donation or non-donation of embryos for research were included. Eligibility and data extraction were performed by two independent researchers and disagreements were resolved by discussion or a third reviewer, if required. The main quantitative findings were extracted and synthesized and qualitative data were assessed by thematic content analysis. Results: A total of 39 studies met the inclusion criteria and were included in the review. More than half of the studies (n �� 21) used a quantitative methodology, and the remaining were qualitative (n �� 15) or mixed-methods (n �� 3) studies. The studies were derived mainly from European countries (n �� 18) and the USA(n �� 11). The proportion of IVF users who donated embryos for research varied from 7% in a study in France to 73% in a Swiss study. Those who donate embryos for research reported feelings of reciprocity towards science and medicine, positive views of research and high levels of trust in the medical system. They described their decision as better than the destruction of embryos and as an opportunity to help others or to improve health and IVF treatments. The perception of risks, the lack of information concerning research projects and the medical system and the conceptualization of embryos in terms of personhood were the most relevant motives for not donating embryos for research. Results relating to the influence of sociodemographic characteristics and reproductive and gynaecological history were mostly inconclusive. Conclusions: Three iterative and dynamic dimensions of the IVF patients��� decision to donate or not to donate embryos for research emerged from this review: the hierarquization of the possible options regarding embryo disposition, according to the moral, social and instrumental status attributed to embryos; patients��� understanding of expectations and risks of the research on human embryos; and patients��� experiences of information exchange and levels of trust in the medical-scientific institutions.