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The Energy Cycle Associated to the Pacific Walker Circulation and Its Relationship to ENSO

Atmospheric and Climate Sciences 2013年第4期3卷 627-642页

作者： Jose Augusto P.Veiga Alexandre B.Pezza tercio amb.izzi V.Brahmananda Rao Sergio H.Franchito Marcos C.Yoshida Institute of Technology Amazon State UniversityManausBrazil School of Earth Sciences The University of MelbourneVictoriaAustralia Institute of Astronomy Geophysics and Atmospheric SciencesUniversity of Sao PauloSao PauloBrazil National Institute for Space Reseach Sao Jose dos CamposBrazil

In this paper we study the Lorenz energy cycle of the Walker circulation associated with ENSO. The robust formulation of the energetics allows drawing a clear picture of the global energy and conversion terms associated with the three dimensional domains appropriate to qualify the large scale transfers that influence, and are influenced by, the anomalies during ENSO. A clear picture has emerged in that El Nino and La Nina years have approximately opposite anomalous energy fluxes, regardless of a non-linear response identified in the potential energy fields (zonal and eddy). During El Ninos the tropical atmosphere is characterized by an increase of zonal available potential energy, decrease of eddy available potential energy and decrease of kinetic energy fields. This results in weaker upper level jets and a slowingdown of the overall Walker cell. During La Ninas reversed conditions are triggered, with an acceleration of the Walker cell as observed from the positive anomalous kinetic energy. The potential energy in the Walker circulation domain during the cold phase is also reduced. An equally opposite behavior is also experienced by the energy conversion terms according to the ENSO phase. The energetics-anomalous behavior seem to be triggered at about the same time when ENSO starts to manifest for both the positive and negative phases, suggesting a coupled mechanism in which atmospheric and oceanic anomalies interact and feed back onto each other.

关键词： Walker Circulation Energetics El Nino La Nina ENSO

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Influence of the Hydriding Cycles on U-IOMo Alloy Comminution Process

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Journal of Energy and Power Engineering 2014年第9期8卷 1559-1567页

作者： Kelly Cristina Martins Faeda Ana Maria Matildes dos Santo~ tercio Assuncao Pedrosa Natalia Mattar Cantagalli Femando Soares Lameiras t Wilmar Barbosa Ferraz Center of Nuclear Technology Development Materials Division Belo Horizonte-MG 31270-901 Brazil

Hydriding-dehydriding process has been widely employed to comminute uranium alloys. Developments have been made to improve this process because it is a cheaper way to obtain powder of uranium alloys compared to the other methods, such as atomization. This work presented an innovative comminution process of U-10Mo alloy in laboratory scale where a Sievert type equipment was utilized and only hydriding cycles were employed without repetition of the dehydriding procedure. Experiments of comminution of the U-10Mo alloy were carried out by employing alloy samples which were submitted to different heat treatment conditions and, subsequently, to different hydriding cycles. The heat treatments considered were hot rolled at 800 ℃, homogenization at 900 ℃ or 1,000 ℃ and aging at 520℃. It was observed that the number of hydriding cycles and heat treatment conditions have influenced the particle size distributions. Samples that were hot-rolled, homogenized at 1,000 ℃ and aged, and comminuted with five cycles of hydriding have produced powders with particle size distribution more uniform with the major quantity of particles in the range from 50μm to 200 μm while the other conditions have obtained a great quantity above 200 μm.

关键词： Hydriding-dehydriding process U-Mo alloys comminution process hydriding-dehydriding cycles.

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Tree-Fall Gaps Effects on Spider(Araneae)Assemblages in an Atlantic Forest Landscape in Northeastern Brazil

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Open Journal of Animal Sciences 2014年第3期4卷 118-133页

作者： Marcelo Cesar Lima Peres Katia Regina Benati Alessandra Rodrigues S.de Andrade Marcos Vinicius Alvim Guimaraes tercio da Silva Melo Antonio Domingo Brescovit Jacques Hubert Charles Delabie Territorial Planning and Social Development Catholic University of SalvadorSalvadorBrazil Ecology Center and Animal Conservation Universidade Catolica do SalvadorSalvadorBrazil Federal University of Bahia SalvadorBrazil Butantan Institute Collections Zoological LaboratorySao PauloBrazil Laboratory of Myrmecology UESC/CEPLACCentre for Cocoa ResearchIlheusBrazil

The study investigates the effect of spatial and temporal tree-fall gaps structure on spiders’ assemblage in an Atlantic forest fragmented area in Brazil. It was conducted in the Michelin Ecological Preserve-REM (Bahia), 190 ha forest remnant. Samples were collected on leaf-litter (50 × 50 cm) at five tree-fall gaps formations (2), within five adjacent primary forest and five inner edge parcels. During 16 months (between May 2009 and October 2012), 480 m2 leaf-litter samples were collected, from which spiders were extracted using mini-Winkler traps. The observed and estimated richness of spider’s species was higher at the edge

关键词： Atlantic Forest Edge Effect Habitat Selection Spatiotemporal Effect Neotropical Fauna

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Acute pancreatitis complicated with splenic rupture: A case report

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World Journal of Gastrointestinal Surgery 2015年第9期7卷 219-222页

作者： Bruno L Hernani Pedro C Silva Ricardo T Nishio Henrique C Mateus José C Assef tercio De Campos Irmandade da Santa Casa de Misericórdia de Sao Paulo Hospital Santa Casa School of Medicine Department of Surgery Emergency UnitIrmandade da Santa Casa de Sao Paulo HospitalSanta Casa School of Medicine

Atraumatic splenic rupture is an uncommon complication of acute pancreatitis. This report describes the case of a 30-year-old man with acute pancreatitis and splenic vein thrombosis complicated by splenic rupture. The patient was admitted to the emergency department with pain in the upper abdomen that had been present for six hours and was associated with vomiting and sweating. He was diagnosed with acute pancreatitis of alcoholic etiology. Upon computed tomography(CT) of the abdomen, the pancreatitis was scored as Balthazar C grade, and a suspicious area of necrosis affecting 30% of the pancreas with splenic vein thrombosis was revealed. Seventytwo hours after admission, the patient had significant improvement in symptoms. However, he showed clinical worsening on the sixth day of hospitalization, with increasing abdominal distension and reduced hemoglobin levels. A CT angiography showed a large amount of free fluid in the abdominal cavity, along with a large splenic hematoma and contrast extravasation along the spleen artery. The patient subsequently underwent laparotomy, which showed hemoperitoneum due to rupture of the splenic parenchyma. A splenectomy was then performed, followed by ultrasound-guided percutaneous drainage.

关键词： Acute pancreatitis Pancreatitis Rupture Splenic rupture Spontaneous

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