115 documents found, page 1 of 12
Sustainability in fashion: A study of clean waste management within a clothing ...
Cruz, H.; Broega, A. C.; Amorim, M. T. Pessoa deThe Apparel Industry is one of the most polluting industries due to the amount of waste that is created throughout the production process. It is essential to study this process to identify the problem, the causes and to propose solutions for a sustainable approach in this sector. This paper presents an exploratory study on the management of textile waste in Portugal in general and more specifically, through a c...
Evaluation of glue line shear strength of laminated timber structures using blo...
Gaspar, F.; Cruz, H.; Gomes, A.Monitoring and evaluation of glued laminated timber structures in service is essential to warrant its integrity, where non-destructive techniques play an important role. This paper describes the results obtained on glued laminated timber beams of maritime pine, with and without preservative treatment, and of spruce, exposed to natural outdoor environment as well as to artificial weathering. The assessment of gl...
Combined impact of diurnal type and time of day on children’s results in a batt...
Cruz, H.; Gomes, A. Allen; Leitão, J. A.; Couto, D.; Carvalhais, L.; Silva, C. F.The present work is part of a larger ongoing research project and it specifically aims to scrutinize whether diurnal-type (morningness- eveningness) and time-of-day have an impact (synchrony effect) on the results obtained by primary school children in standardized measures assessing reading skills and difficulties. Morning- and evening-type children attending the 2nd, 3rd or 4th grades were selected in a Portu...
Combined influence of fluoride and biofilms on the biotribocorrosion behavior o...
Cruz, H.; Henriques, Mariana; Teughels, Wim; Celis, Jean-Pierre; Rocha, L. A.Dental implant failures occur mainly due to biofilm infections and mastication micro-movements or load stresses that may induce wear degradation. Dental implants microgaps are highly susceptible areas for biofilm formation and fluoride retention. Although fluoride is an antimicrobial agent widely used in caries prevention, its influence on biofilms under sliding wear remains unknown. The main aim of this work w...
What makes umbilical cord tissue-derived mesenchymal stromal cells superior imm...
Bárcia, R. N.; Santos, J. M.; Filipe, M.; Teixeira, M.; Martins, J. P.; Almeida, J.; Água-Doce, A.; Almeida, S. C. P.; Varela, A.; Pohl, S.MSCs derived from the umbilical cord tissue, termed UCX, were investigated for their immunomodulatory properties and compared to bone marrow-derived MSCs (BM-MSCs), the gold-standard in immunotherapy. Immunogenicity and immunosuppression were assessed by mixed lymphocyte reactions, suppression of lymphocyte proliferation and induction of regulatory T cells. Results showed that UCX were less immunogenic and show...
Modeling the influence of delamination on the mechanical performance of straigh...
Gaspar, F.; Cruz, H.; Gomes, A.Delamination at the glue lines is a key factor to take into account when assessing glued laminated timber members in service. In order to gain a more objective and wide knowledge about the importance of delamination in relation to its type and extension, a numerical study was developed. Finite element modeling (FEM) was used to evaluate the influence of delamination – near the surface, on the vertical faces and...
Sustainable use of timber in construction - specification, detailing, maintenan...
Cruz, H.Timber is highly interesting from the point of view of sustainable construction and, besides most traditional uses it has received increasing attention in modern building industry. However, both the timber material and timber structures require particular attention, care and adequate strategies concern in materials specification, design, detailing, maintenance and repair for extended life. Specific to timber as...
Estratégia de I&D&I 2013-2020 do Departamento de Estruturas do LNEC
Catarino, J. M.; Cruz, H.; Mun, M.; Baptista, A. M.; Pipa, M.; Silveira, A. P. C. da; Oliveira Santos, L.; Campos Costa, A.; Coelho, E.; Bairrão, R.Este relatório apresenta a estratégia de I&D&I adotada pela Comissão Científica Departamental (CCD) do Departamento de Estruturas do LNEC (DE), em coerência com a estratégia de investigação e inovação (E2I) estabelecida pelo LNEC para o período 2013-2020 e respondendo ao Plano de Ação da E2I sobre o aprofundamento da E2I nas unidades departamentais do LNEC. Esta estratégia do DE enquadra nove linhas prioritária...
Reaction to fire of existing timber elements protected with fire retardant trea...
Laranjeira, J.; Cruz, H.; Ferreira Pinto, A. P.; Pina dos Santos, C.; Pereira, J.Fire safety is an important issue of buildings safety, especially when their fire load contents enhance the risks of fire deflagration. When existing timber structures are involved, the most usual way to improve its reaction to fire is to treat wood with fire retardants. This study focuses on the surface protection of existing timber roof structures against fire, through the use of Fire Retardant (FR) treatment...
Building vulnerabilities to fires at the wildland urban interface
Laranjeira, J.; Cruz, H.Fires on the Wildland Urban Interface (WUI) have caused significant loss of life and colossal property and natural environment damages in numerous countries around the world. The solutions to mitigate this fire problem are complex, as it results from the fuel source changes from vegetation to structural materials in a fireprone environment and it involves the interaction of several factors that act synergistica...