Seismic assessment of a heavy-timber frame structure with ring-doweled moment-resisting connections

The performance of heavy-timber structures in earthquakes depends strongly on the inelastic behavior of the mechanical connections. Nevertheless, the nonlinear behavior of timber structures is only considered in the design phase indirectly through the use of an R-factor or a q-factor, which reduces the seismic elastic response spectrum. To improve the estimation of this, the seismic performance of a three-story building designed with ring-doweled moment resisting connections is analyzed here. Connections and members were designed to fulfill the seismic detailing requirements present in Eurocode 5 and Eurocode 8 for high ductility class structures. The performance of the structure is evaluated through a probabilistic approach, which accounts for uncertainties in mechanical properties of members and connections. Nonlinear static analyses and multi-record incremental dynamic analyses were performed to characterize the q-factor and develop fragility curves for different damage levels. The results indicate that the detailing requirements of Eurocode 5 and Eurocode 8 are sufficient to achieve the required performance, even though they also indicate that these requirements may be optimized to achieve more cost-effective connections and members. From the obtained fragility curves, it was verified that neglecting modeling uncertainties may lead to overestimation of the collapse capacity

O perfil da mulher portadora de HIV/AIDS e sua adesão à terapêutica antirretroviral

Esse trabalho teve como objetivos caracterizar o perfil sociodemográfico e clínico, os comportamentos em saúde, crenças e atitudes sobre a doença e o tratamento de mulheres com HIV/AIDS atendidas no serviço ambulatorial de um hospital universitário do interior de São Paulo, bem como identificar fatores que interferem na adesão à terapêutica antirretroviral. Os sujeitos do estudo foram 60 mulheres acompanhadas no serviço. Os dados foram colhidos por meio de entrevista semiestruturada. As mulheres tinham idade média de 39,8 (desvio padrão 9,1) anos, baixa escolaridade, condições socioeconômicas insatisfatórias e mantinham relacionamento estável. A relação heterossexual foi a forma mais frequente de infecção; 55% das mulheres já abandonaram o tratamento e alegavam como principais motivos os esquemas terapêuticos impostos, os efeitos colaterais dos antirretrovirais, o enfrentamento psicológico da doença e o pesar iminente da morte; 35% delas não atingiram critérios de adesão considerando-se o uso de 95% da terapêutica antirretroviral prescrita

Diabetes mellitus: new therapeutic approaches to treat an old disease

<p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: normal; text-align: justify; mso-layout-grid-align: none;"> Diabetes mellitus is a widespread disease whose frequency increases constantly and is expected to reach alarming levels by the year 2025. Introduction of insulin therapy represented a major breakthrough; however, a very strict regimen is required to maintain blood glucose levels within the normal range and to prevent or postpone chronic complications associated with this disease. Frequent hyper- and hypoglycemia seriously affect the quality of life of these patients. Reversion of this situation can only be achieved through whole organ (pancreas) transplant or pancreatic islet transplant, the former being a high-risk surgical procedure, while the latter is a much simpler and may be accomplished in only 20-40 min. The advantages and perspectives of islet cell transplantation will be discussed, in the light of tissue engineering and gene therapy. Ongoing research carried out in our laboratory, aimed at developing clinical cell and molecular therapy protocols for diabetes will also be focused. Keywords: Diabetes mellitus, cell and molecular therapy, human pancreatic islets, degenerative diseases, recombinant biopharmaceuticals. </p&gt