Avaliação e reforço sísmico de estruturas de betão armado

Apresenta-se um programa experimental que incluiu o ensaio em escala real de dois pórticos de betão armado representativos da construção no sul da Europa com 40/50 anos, com necessi-dade de reabilitação sísmica. São feitas algumas considerações sobre o comportamento experi-mental das estruturas, que foram ensaiadas sem qualquer intervenção, posteriormente reparadas e novamente ensaiadas considerando diferentes técnicas de reforço sísmico

VARIAÇÃO DOS CONSTITUINTES BIOQUÍMICOS SANGUÍNEOS DE TARTARUGAS-DA-AMAZÔNIA (Podocnemis expansa, Schweigger 1812) (TESTUDINATA) MANTIDAS EM CRIATÓRIO COMERCIAL

The aim of the present research was to evaluate the biochemistry of blood constituents from the South American River Turtle Podocnemis expansa, Schweigger 1912. For this experiment, 46 animals from Moenda do Lago Farm, a commercial farm from São José dos Bandeirantes, Goiás State, Brazil, were used, the blood being collected from the vertebral sinus, trsnferred to vacuntainer tubes without anticoagulant, spun down, the serum collected in eppendorfs and storaged at 20C and the respective analysis carried out by colorimetric techniques and fast glucose sensor Precision Plus MedsenseÅ at the College of Veterinary Medicine Latobatories at Federal University of Uberlandia, Minas Gerais State, Brazil. The mean values found were as follows: Total proteins, 4.42 ± 0.55 g/dL, albumin, 2.50 ±0.2 g/dL, globulins, 1.92 ± 0.35 mg/dL, albumin/globulin ratio (A/G) 1.55 ±1.46, glucose, 122.9 ± 35.2 mg/dL, urea, 61.13 ± 28.35 mg/dL, creatinine, 0.098 ± 0.021 mg/dL, uric acid, 2.08 ± 0.53 mg/dL, cholesterol, 106.93 ± 21.03 mg/dL, total calcium,7.08 ± 1.04 mg/dL, ionic calcium, 4.41 ± 0.60 mg/dL, phosphorus, 5.21 ± 1.22 mg/dL, calcium/phosphorus ratio, 1.58 mg/dL ± 0.66, iron, 390.35 ± 116,65 µg/dL, magnesium, 1.59 ± 0.14, chlorides, 86.40 ± 7.63 mEq/ L, aspartate aminotransferase (AST) 194.56 ± 154.27 U/L, alanineaminotransferase (ALT) 4.04 ± 3.00 U/L, alkaline phosphatase, 131.13 ± 59.96 U/L, ¡- glutamiltransferase (GGT) 0.60 ± 0.84 U/L and tryglicerides, 127.65 ± 100.86 mg/dL. In conclusion, mean values of blood constituents of Podocnemis expansa did not show great differences from other chelonian species. The albumin/globulin ratio, and uric acid and glucose values were inversely related to body weight. Thus, the results of this research bring data on South America River Turtle blood biochemistry raised in captivity, although new research studies will be necessary to establish the species reference values.O objetivo desta pesquisa foi avaliar as variações dos constituintes bioquímicos sanguíneos da tartaruga Podocnemis expansa de um criatório comercial. Para isto, foram colhidas, por venipuntura do seio vertebral caudal, amostras de sangue de 46 animais mantidos em tanques na Fazenda Moenda do Lago, distrito de São José dos Bandeirantes, município de Nova Crixás GO. Após colhidas, as amostras de sangue foram transferidas rapidamente para frascos vacutainer® sem anticoagulante e levados à centrífuga para obtenção do soro, logo após transferidos para eppendorf e armazenados a 200C. O material foi transportado para o laboratório da Faculdade de Medicina Veterinária (FAMEV) da Universidade Federal de Uberlândia (UFU) para o seu processamento. As análises foram processadas colorimetricamente e em sensor rápido de glicose (Precision Plus Medsense®), os valores médios foram: proteínas totais 4,42±0,55 g/ dL, albumina 2,50±0,2 g/dL, globulinas 1,92±0,35 g/dL, relação albumina/globulinas (A/G) 1,55±1,46, glicose 122,9±35,2 mg/dL, uréia 61,13±28,35 mg/dL, creatinina 0,098±0,021 mg/dL, ácido úrico 2,08±0,53 mg/dL, cálcio total 7,08±1,04 mg/dL, cálcio ionizado 4,41±0,60 mg/ dL, colesterol 106,93±21,03 mg/dL, fósforo 5,21±1,22 mg/dL, relação cálcio/fósforo (Ca++/P) 1,58±0,66, ferro 390,35±116,65 ì g/dL, magnésio 1,59±0,14 mg/dL, cloretos 86,40±7,63 mEq/L, aspartato aminotransferase (AST) 194,56±154,27 U/L, alanino aminotransferase (ALT) 4,04±3,00 U/L, fosfatase alcalina 131,13±59,96 U/L, gama glutamiltransferase (GGT) 0,60±0,84 U/L e triglicérides 127,65±100,86 mg/dL. Conclui-se que os valores apresentam grandes diferenças dos valores de outras espécies de quelônios e que a relação albumina:globulina, as concentrações plasmáticas de ácido úrico e glicose são inversamente proporcionais às massas corporais dos animais. A espécie estudada apresenta escassos valores de bioquímica sanguínea na literatura, desta maneira os dados que foram apresentados auxiliam no estabelecimento de um padrão de bioquímica sanguínea para Podocnemis expansa criadas em cativeiro, mas também pode ser base para novos estudos

Network Flows Heuristics for Complementary Cell Suppression: An Empirical Evaluation and Extensions

Several network flows heuristics have been suggested in the past for the solution of the complementary suppression problem. However, a limited computational experience using them is reported in the literature, and, moreover, they were only appropriate for two-dimensional tables. The purpose of this paper is twofold. First, we perform an em-pirical comparison of two network flows heuristics. They are improved versions of already existing approaches. Second, we show that exten-sions of network flows methods (i.e., multicommodity network flows and network flows with side constraints) can model three-dimensional, hierarchical and linked tables. Exploiting this network structure can improve the performance of any solution method solely based on linear programming formulations

Evidence of Color Coherence Effects in W+jets Events from ppbar Collisions at sqrt(s) = 1.8 TeV

We report the results of a study of color coherence effects in ppbar collisions based on data collected by the D0 detector during the 1994-1995 run of the Fermilab Tevatron Collider, at a center of mass energy sqrt(s) = 1.8 TeV. Initial-to-final state color interference effects are studied by examining particle distribution patterns in events with a W boson and at least one jet. The data are compared to Monte Carlo simulations with different color coherence implementations and to an analytic modified-leading-logarithm perturbative calculation based on the local parton-hadron duality hypothesis.Comment: 13 pages, 6 figures. Submitted to Physics Letters

Search for single top quarks in the tau+jets channel using 4.8 fb−1^{-1} of ppˉp\bar{p} collision data

We present the first direct search for single top quark production using tau leptons. The search is based on 4.8 fb$^{-1}$ of integrated luminosity collected in $p\bar{p}$ collisions at $\sqrt{s}$=1.96 TeV with the D0 detector at the Fermilab Tevatron Collider. We select events with a final state including an isolated tau lepton, missing transverse energy, two or three jets, one or two of them $b$ tagged. We use a multivariate technique to discriminate signal from background. The number of events observed in data in this final state is consistent with the signal plus background expectation. We set in the tau+jets channel an upper limit on the single top quark cross section of \TauLimObs pb at the 95% C.L. This measurement allows a gain of 4% in expected sensitivity for the observation of single top production when combining it with electron+jets and muon+jets channels already published by the D0 collaboration with 2.3 fb$^{-1}$ of data. We measure a combined cross section of \SuperCombineXSall pb, which is the most precise measurement to date.Comment: 12 pages, 5 figure

Measurement of Z/gamma*+jet+X angular distributions in ppbar collisions at sqrt{s}=1.96 TeV

We present the first measurements at a hadron collider of differential cross sections for Z+jet+X production in delta phi(Z, jet), |delta y(Z, jet)| and |y_boost(Z, jet)|. Vector boson production in association with jets is an excellent probe of QCD and constitutes the main background to many small cross section processes, such as associated Higgs production. These measurements are crucial tests of the predictions of perturbative QCD and current event generators, which have varied success in describing the data. Using these measurements as inputs in tuning event generators will increase the experimental sensitivity to rare signals.Comment: Published in Physics Letters B 682 (2010), pp. 370-380. 15 pages, 6 figure