Browsing by Issue Date, starting with "2019-09"
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- Sim, (também) sou capaz Projeto Integrado e Inovador de Combate ao Insucesso Escolar - Relatório anual 2018-2019. Relatório Técnico no âmbito territorial dos municípios integrados na Comunidade Intermunicipal da Região de Leiria.Publication . Milhano, Sandrina Diniz Fernandes; Reis, Susana Alexandre dos; Mangas, Catarina
- Disruptive Future of Radar Based on All-Digital PN Signal ProcessingPublication . Ribeiro, Carlos; Ferreira Gil, João; Caldeirinha, Rafael; Reis, Joao R.; Sardo, Andre; Duarte, Luis; Leonor, NunoThis paper presents the first results on the design and implementation of a real-time and high resolution monostatic radar at 24 GHz, based on the sliding correlation of pseudonoise (PN) sequences. The real-time radar, with a high time resolution better than 4ns, is used for moving target identification (MTI) in the presence of highly dense clutter, under harsh environments and severe weather conditions (fog, snow and fire smoke or plume). A radar signal processing based on alldigital PN sequences is proposed, which represents a quantum leap in radar future front-end architecture. Results obtained in a controlled environment, inside an anechoic chamber, are presented and a benchmark with a commercially-of-the-shelf solution is presented. © 2019 IEEE.
- Optimized Reference Picture Selection for Light Field Image CodingPublication . Monteiro, J. S. Ricardo; Nunes, J. L. Paulo; M. M. Rodrigues, Nuno; Faria, SergioThis paper proposes a new reference picture selection method for light field image coding using the pseudovideo sequence (PVS) format. State-of-the-art solutions to encode light field images using the PVS format rely on video coding standards to exploit the inter-view redundancy between each sub-aperture image (SAI) that composes the light field. However, the PVS scanning order is not usually considered by the video codec. The proposed solution signals the PVS scanning order to the decoder, enabling implicit optimized reference picture selection for each specific scanning order. With the proposed method each reference picture is selected by minimizing the Euclidean distance to the current SAI being encoded. Experimental results show that, for the same PVS scanning order, the proposed optimized reference picture selection codec outperforms HEVC video coding standard for light field image coding, up to 50% in terms of bitrate savings
- Modelling strain penetration effects in RC walls with smooth steel barsPublication . Caruso, Claudia; Bento, Rita; Sousa, Romain; Correia, António A.Reinforced-concrete (RC) dual wall–frame structures comprise an important proportion of the building stock in some European cities. However, many were constructed without seismic provisions and it is therefore important to assess their ability to withstand seismic events and to define strategies to reduce their potential vulnerability. This work focuses on the numerical simulation of the seismic behaviour of RC walls making use of fibre-based non-linear beam elements. Even though it is common to assume perfect bond between reinforcing bars and concrete, the relative bond–slip deformations between the two materials can contribute up to 40% of the total lateral deformation of columns when ribbed rebars are used and up to 90% in the case of smooth rebars. The aim of this paper is to provide a contribution towards understanding the importance of these effects in old RC walls and to provide indications regarding the use of a simplified bond–slip model.
- Afonso Lopes Vieira e a elite universitáriaPublication . Nobre, CristinaAs relações de Lopes Vieira com a universidade, sobretudo a de Coimbra, mas também a de Lisboa, nunca se chegam a perder — o poeta mantém a amizade com Eugénio de Castro, diretor da Faculdade de Letras; profere a conferência "Camões em Coimbra", em 2 de junho de 1915, (a convite da Associação Académica, representada por Horácio Menano), onde pela primeira vez lança a ideia de um monumento a Camões no Jardim Botânico, daquela cidade; recebe um diploma em fevereiro de 1925, assinado pelos Drs. Mendes dos Remédios, Simões Ventura e Joaquim de Carvalho em que lhe é reconhecido o "Liberalium Artium Praeceptores Conimbrigensis Universitatis Clarissimo Viro D. Dr. Affonso Lopes Vieira". O artigo analisa algumas das relações do escritor com a elite universitária do seu tempo.
- Como o desempenho socialmente responsável promove a retenção de trabalhadores na indústria hoteleira: o papel do suporte organizacional e da identificação com a organizaçãoPublication . Duarte, Patrícia; Neves, José; Mouro, Carla; Ribeiro, Neuza
- The evaluation of CSR perception: a study in Portugal and UkrainePublication . Sokil, Oksana; Ubreziová, Iveta; Eugénio, Teresa; Marques, Tânia
- Sitting time and associated factors among Portuguese older adults: results from Nutrition UP 65Publication . Sousa, Ana Sofia; Mendes, Joana; Guerra, Rita S.; Padrão, Patrícia; Moreira, Pedro; Santos, Alejandro; Borges, Nuno; Afonso, Cláudia; Martins, Cátia; Ferro, Graça; Amaral, Teresa F.Older adults are particularly susceptible to sedentary behaviours. Sitting time has been increasingly referred to as a potentially modifiable risk factor in the prevention of chronic diseases. Identifying factors associated with sitting time, particularly those that are modifiable, will allow for more effective public health strategies. This study aimed to describe sitting time among Portuguese older adults and to evaluate associated factors. A cross-sectional study including 1423 older adults ≥ 65 years old was conducted. Sitting time was assessed with the International Physical Activity Questionnaire. Socio-demographic, health, anthropometric and functional variables were collected. Bivariate and multivariate linear regression models were conducted to study the association between these variables and sitting time. The median of sitting time was 300 min/day (interquartile range = 240 min/day), which is equal to 5 h/day. The following factors were directly associated with longer sitting time: being male, age ≥ 80 years, living in Central or Southern Portugal, being retired from work, as well as presenting low physical activity, obesity or longer time to walk 4.6 metres. On the other hand, being married, having higher education and higher household income were inversely associated with longer sitting time. It can be concluded that Portuguese older adults spend a considerable amount of time sitting per day. Potentially modifiable risk factors associated with longer sitting time in this population were related to nutritional status and functional ability.
- A contemporaneidade do Sarau: A ''leitura ouvida'' no Brasil como instrumento de difusão da literaturaPublication . Souza, Djair Rodrigues de; Caeiro, Mário Jorge da Câmara de MeloEsta dissertação tem como tema a “leitura ouvida”, destacando uma de suas manifestações mais proeminentes: o sarau literário. A partir de uma experiência pessoal de atividade literária promovida durante uma greve de servidores públicos da Universidade Federal do Espírito Santo, ini cialmente procura se compreender, na trajetória histórica no Brasil, as múltiplas fa- cetas do sarau: o serão doméstico e as agremiações de Literatura dos tempos coloniais; o salão burguês no período do Império; a proliferação do sarau artístico ou beneficen te nas primeiras décadas da República. Procura depois refletir a utilização do sarau como método pedagógico sob a forma de Hora do Conto , as razões do insucesso das tentativas mentais de um programa escolar de formação de leitores, e finalmente o re ssurgimento dos saraus nas periferias das grandes cidades e em Vitória, Espírito Santo, sede da Universidade Federal. A ter como base a liberdade de ação, o sentimento de pertença e a irrupção da cida- dania, que caracterizam uma nova significação do sarau e da “leitura ouvida” nos dias atuais, apresenta se como corolário da investigação um plano de ação cultural, sob o título de Festi- valer , a ser desenvolvido na Biblioteca Central da mesma Universidade. Pelo mesmo se busca a valorização da “leitura ouvida” c omo difusora da Literatura entre os diversos extratos da comunidade universitária.
- Fórum Sociológico, Número temático: Arte Urbana: contextos, tendências e desafiosPublication . Marques, José Carlos Laranjo; Campos, Ricardo; Sequeira, Ágata