DESIGN OF A SEISMIC SIMULATION FRAME FOR TESTING OF MASONRY STRUCTURES

Abstract Simulating seismic loads on masonry structures generally requires the use of a seismic simulation table also known as a "Shak

Análise do comportamento de conexão vertical de painéis estruturais cerâmicos pré-fabricados

O presente trabalho visa avaliar a influência do modelo de ligação no desempenho estrutural de painéis pré-fabricados de alvenaria. De modo geral, a conexão entre os painéis estruturais cerâmicos pré-fabricados apresentam comportamento idêntico ao da amarração indireta da alvenaria estrutural. Este fato aliado à falta de dados suficientes para o estabelecimento de parâmetros que possibilitem a consideração da interação entre os painéis induz ao dimensionamento das edificações pré-fabricadas em alvenaria estrutural pelo "Método das paredes isoladas". Entretanto, os resultados obtidos por meio de ensaios experimentais e através de análise numérica demonstraram que a generalização pode levar ao erro, uma vez que para o modelo de conexão avaliado houve a presença da interação entre o painel central e os da extremidade

Dechlorination of perchlorinated aromatic compounds by graphite-potassium-intercalate

Lissel M, Kottmann J, Lenoir D. Dechlorination of perchlorinated aromatic compounds by graphite-potassium-intercalate. Chemosphere. 1989;19(10-11):1499-1502

The Handling of the Rectal Stump Does Not Affect Severe Morbidity After Subtotal Colectomy For Ulcerative Colitis: A Retrospective Cohort Study

Background and Aims: Colectomy due to ulcerative colitis is associated with complications. One severe complication is the risk for blow-out of the remaining rectal remnant. The aim of this study was to compare the frequency and severity of complications in patients with the rectal remnant left subcutaneously versus patients with the rectal remnant left intra-abdominally. A secondary aim was to identify risk factors for complications. Materials and Methods: Consecutive patients at two tertiary centers in Sweden were retrospectively reviewed regarding surgical procedures; complications classified according to Clavien-Dindo; and possible risk factors for complications such as preoperative medication, emergency surgery, and body mass index. Results: 307 patients were identified. Minor complications were more common than previously reported (85%-89%). Severe surgical complications were not related to the handling of the rectal remnant. Leaving the rectal remnant subcutaneously was associated with local wound problems. Risk factors for severe complications were emergency surgery and preoperative medication with 5-aminosalicylic acid. Conclusion: Minor complications after colectomy for ulcerative colitis are very common and need to be addressed. Leaving the rectal stump intra-abdominally seems safe and may be advantageous to reduce local wound morbidity