146 research outputs found
ESTUDO DE CAVERNAS EM ROCHAS NÃO CARBONÁTICAS DA AMAZÔNIA: CONTRIBUIÇÃO DA ANÁLISE GEOECOLÓGICA SOBRE A GEOMORFOLOGIA CÁRSTICA DA PROVÍNCIA ESPELEOLÓGICA ALTAMIRA – ITAITUBA (PARÁ)
A região Amazônica é rica em feições geomorfológicas resultantes da interação sistêmica de elementos da natureza entre os quais se destaca o patrimônio espeleológico. A pesquisa apresenta um estudo aprofundado sobre carste em rochas não carbonáticas da Província Espeleológica Altamira-Itaituba (Estado do Pará). Foi realizada uma análise geoecológica da paisagem da Província, por meio da utilização do enfoque sistêmico, com foco no estudo sobre carste em rochas não carbonáticas
Entropy of semiclassical measures for nonpositively curved surfaces
We study the asymptotic properties of eigenfunctions of the Laplacian in the
case of a compact Riemannian surface of nonpositive sectional curvature. We
show that the Kolmogorov-Sinai entropy of a semiclassical measure for the
geodesic flow is bounded from below by half of the Ruelle upper bound. We
follow the same main strategy as in the Anosov case (arXiv:0809.0230). We focus
on the main differences and refer the reader to (arXiv:0809.0230) for the
details of analogous lemmas.Comment: 20 pages. This note provides a detailed proof of a result announced
in appendix A of a previous work (arXiv:0809.0230, version 2
Aneurismas Toracoabdominais Rotos [ruptured Thoracoabdominal Aneurysms]
Objective: To evaluate the pre-, intra- and postoperative data of ruptured thoracoabdominal aneurysms operated at Hospital de Clínicas da Universidade Estadual de Campinas. Methods: A retrospective study of five patients submitted to repair of ruptured thoracoabdominal aneurysm at Hospital de Clínicas da Universidade Estadual de Campinas from September 2000 to April 2004. All patients presented a ruptured type IV thoracoabdominal aneurysm, and four of them were hemodynamically stable. Three patients were operated by the simple supraceliac aortic clamping and saline solution infusion at 4°C in the renal arteries; one patient died during the surgery before the aneurysm was opened; and one patient was operated by perfusion of oxygenated blood in the visceral arteries. Results: Of the five patients operated, two died (40%). One of them presented hemodynamic instability and died during the surgery; the other patient died on the 26 th postoperative day due to multiple organ failure. All three surviving patients progressed well, with no sequelae. Among patients who were taken to the operating room hemodynamically stable, the mortality rate was 25%. Conclusions: Patients with ruptured type IV thoracoabdominal aneurysm, hemodynamically stable, achieved satisfactory surgical results, similar to infrarenal ruptured aneurysms. Copyright © 2006 by Sociedade Brasileira de Angiologia e de Cirurgia Vascular.513741Bradbury, A.W., Bulstrode, N.W., Gilling-Smith, G., Stansby, G., Mansfield, A.O., Wolfe, J.H., Repair of ruptured thoracoabdominal aortic aneurysm is worthwhile in selected cases (1999) Eur J Vasc Endovasc Surg, 17, pp. 160-165Lewis, M.E., Ranasinghe, A.M., Revell, M.P., Bonser, R.S., Surgical repair of ruptured thoracic and thoracoabdominal aortic aneurysms (2002) Br J Surg, 89, pp. 442-445Cowan Jr., J.A., Dimick, J.B., Wainess, R.M., Henke, P.K., Stanley, J.C., Upchurch Jr., G.R., Ruptured thoracoabdominal aortic aneurysm treatment in the United States: 1988 to 1998 (2003) J Vasc Surg, 38, pp. 319-322LeMaire, S.A., Rice, D.C., Schmittling, Z.C., Coselli, J.S., Emergency surgery for thoracoabdominal aortic aneurysms with acute presentation (2002) J Vasc Surg, 35, pp. 1171-1178Rocha, E.F., Luccas, G.C., Baldini Neto, L., Aneurisma tóracoabdominal inflamatório (2005) J Vasc Br, 4, pp. 301-306Rocha, E.F., Guillaumon, A.T., Antunes, N., Vieira, R.W., Aneurisma toracoabdominal roto: Modificação do circuito de perfusão visceral (2004) Rev Bras Cir Cardiovasc, 19, pp. 413-416Mastroroberto, P., Chello, M., Emergency thoracoabdominal aortic repair: Clinical outcome (1999) J Thorac Cardiovasc Surg, 118, pp. 477-481Cota, A.M., Omer, A.A., Jaipersad, A.S., Wilson, N.V., Elective versus ruptured abdominal aortic aneurysm repair: A 1-year cost-effectiveness analysis (2005) Ann Vasc Surg, 19, pp. 858-861Girardi, L.N., Krieger, K.H., Altorki, N.K., Mack, C.A., Lee, L.Y., Isom, O.W., Ruptured descending and thoracoabdominal aortic aneurysms (2002) Ann Thorac Surg, 74, pp. 1066-1070Schepens, M.A., Defauw, J.J., Hamerlijnck, R.P., De Geest, R., Vermeulen, F.E., Surgical treatment of thoracoabdominal aortic aneurysms by simple crossclamping. Risk factors and late results (1994) J Thorac Cardiovasc Surg, 107, pp. 134-142Cambria, R.P., Davison, J.K., Zannetti, S., L'Italien, G., Atamian, S., Thoracoabdominal aneurysm repair: Perspectives over a decade with the clamp-and-sew technique (1997) Ann Surg, 226, pp. 294-303Anacleto, A., Anacleto, J.C., Aneurismas da aorta torácica e toracoabdominal (2002) Cirurgia Vascular: Cirurgia Endovascular, Angiologia, pp. 439-459. , Brito CJ. Rio de Janeiro: RevinterSantos, V.P., Ignácio, M.R., Da Silveira, D.R., Caffaro, R.A., Aneurisma toracoabdominal roto: Relato de um caso com o uso de anel rígido sulcado de Delrin intraluminal na anastomose proximal (2004) J Vasc Br, 3, pp. 383-38
Prevalence of antibodies to human herpesvirus-8 in populations with and without risk for infection in São Paulo State
Study of the comprehension of the scientific method by members of a university health research laboratory
Structure of Anopheles (Diptera: Culicidae) population in areas with different degrees of human settlement: Cantá - Roraima - Brazil
Optimization of the Sybr Green real time PCR for the detection of Human Herpes Virus type 6 (HHV-6)
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