RESUMO
Many composite manufacturing processes employ the consolidation of pre-impregnated preforms. However, in order to obtain adequate performance of the formed part, intimate contact and molecular diffusion across the different composites' preform layers must be ensured. The latter takes place as soon as the intimate contact occurs and the temperature remains high enough during the molecular reptation characteristic time. The former, in turn, depends on the applied compression force, the temperature and the composite rheology, which, during the processing, induce the flow of asperities, promoting the intimate contact. Thus, the initial roughness and its evolution during the process, become critical factors in the composite consolidation. Processing optimization and control are needed for an adequate model, enabling it to infer the consolidation degree from the material and process features. The parameters associated with the process are easily identifiable and measurable (e.g., temperature, compression force, process time, â¯). The ones concerning the materials are also accessible; however, describing the surface roughness remains an issue. Usual statistical descriptors are too poor and, moreover, they are too far from the involved physics. The present paper focuses on the use of advanced descriptors out-performing usual statistical descriptors, in particular those based on the use of homology persistence (at the heart of the so-called topological data analysis-TDA), and their connection with fractional Brownian surfaces. The latter constitutes a performance surface generator able to represent the surface evolution all along the consolidation process, as the present paper emphasizes.
RESUMO
Abstract Objective: To evaluate the influence of the Mat Pilates method on thoracic hyperkyphosis and postural balance among elderly women. Method: A randomized longitudinal study was performed involving 31 elderly women who were divided into two groups: the Control Group (n=17) and the Pilates Group (n=14). The Pilates Group underwent training while the Control Group attended lectures. Evaluation consisted of specific balance (one-leg right and left) and thoracic kyphosis (computed biophotogrammetry) tests. The subjects were reassessed at the end of eight weeks. Data was analyzed by the Shapiro-Wilk test for normality, and the paired Student's t, the unpaired Student's t, the Wilcoxon, and the Mann-Whitney statistical tests, with a significance level of 5% (p<0.05). Results: The Pilates group maintained balance levels (p>0.05) and had a mean thoracic kyphosis reduction of 6 degrees (p<0.001). There was no significant difference (p>0.005) in any of the variables in the Control Group. Conclusion: The present study found that the Mat Pilates method contributed to a reduction in thoracic kyphosis and the maintenance of balance in the elderly women investigated. REBEC: RBR-6jd8nq.
Resumo Objetivo: Avaliar a influência do método Pilates Solo na hipercifose torácica e no equilíbrio em idosas. Método: Estudo randomizado, longitudinal. Participaram do estudo 31 idosas entre 60 e 75 anos, que foram divididas em dois grupos: Grupo Controle (n=17) e Grupo Pilates (n=14). O Grupo Pilates realizou treinamento, enquanto o Grupo Controle participou de palestras. A avaliação foi composta por testes específicos de equilíbrio (teste Unipodal direita e esquerda) e de hipercifose torácica (biofotogrametria computadorizada). Ao término das oito semanas ambos os grupos foram reavaliados. Os dados obtidos foram analisados por meio do teste de normalidade Shapiro-Wilk, teste t Student pareado, teste t Student não pareado, teste Wilcoxon e teste Mann-Whitney. Considerou-se nível de significância de 5% (p<0,05). Resultados: O Grupo Pilates apresentou manutenção no equilíbrio (p>0,05) e diminuição da hipercifose torácica em média de 6 graus (p<0,001), enquanto o Grupo Controle não apresentou diferença significativa (p>0,05) em nenhuma das variáveis. Conclusão: Pode-se concluir que o método Pilates Solo contribuiu na diminuição da hipercifose torácica e manutenção do equilíbrio das idosas investigadas. REBEC: RBR-6jd8nq.
RESUMO
A case of primary prostate involvement by mantle-cell lymphoma diagnosed at the time of transvesical adenomectomy is reported. Diagnostic difficulties and clinical outcome are also presented. The possibility of prostate involvement by malignant lymphomas, albeit rare, should be considered in any case of histological evidence of dense prostate lymphoid infiltrate in patients with lower urinary tract obstruction, and should be highly suspected in patients with prior history of systemic lymphoma. Immunohistochemical analysis is essential for a correct diagnosis. Both urologists and pathologists should be aware of the existence of such a rare clinical condition.
