Ranking procedure based on mechanical, durability and thermal behavior of mortars with incorporation of phase change materials

Nowadays, considering the high variety of construction products, adequate material selection, based on their properties and function, becomes increasingly important. In this research, a ranking procedure developed by Czarnecki and Lukowski is applied in mortars with incorporation of phase change materials (PCM). The ranking procedure transforms experimental results of properties into one numerical value. The products can be classified according to their individual properties or even an optimized combination of different properties. The main purpose of this study was the ranking of mortars with incorporation of different contents of PCM based in different binders. Aerial lime, hydraulic lime, gypsum and cement were the binders studied. For each binder, three different mortars were developed. Reference mortars, mortars with incorporation of 40% of PCM and mortars with incorporation of 40% of PCM and 1% of fibers, were tested. Results show that the incorporation of PCM in mortars changes their global performance.

Differences in muscular activity between obese and non-obese workers during manual lifting

The prevalence of obesity is increasing throughout the workforce. Manual lifting tasks are common and can produce significant muscle loading. This study compared muscular activity between obese and non-obese subjects, using surface Electromyography (EMG), during manual lifting. Six different lifting tasks (with 5, 10 and 15 kg loads in free and constrained styles) were performed by 14 participants with different obesity levels. EMG data normalization was based on the percentage of Maximum Contraction during each Task (MCT). Muscle Activation Times (AT) before each task were also evaluated. The study suggests that obesity can increase MCT and delay muscle AT. These findings reinforce the need to develop further studies focused on obesity as a risk factor for the development of musculoskeletal disorders.

Aliança terapêutica pais-terapeuta como indicador da qualidade da relação terapêutica entre criança e terapeuta

Este estudo pioneiro pretende associar a qualidade da aliança terapêutica estabelecida entre os pais e o terapeuta com a qualidade da relação terapêutica entre a criança e o terapeuta. O objectivo foi perceber como estas duas variáveis se podem influenciar entre si. A amostra era constituída por 21 díades pai/mãe filho que teriam de individualmente avaliar a sua relação terapêutica estabelecida com o terapeuta. As dimensões avaliadas foram a qualidade da relação, os objectivos e as tarefas do processo terapêutico. Os resultados obtidos não encontraram uma associação entre as relações terapêuticas globais dos pais e dos filhos com o terapeuta. Todavia, algumas correlações secundárias foram encontradas. Orientações e recomendações para futuras replicações do presente estudo são discutidas.