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Search Results: 1 - 10 of 28 matches for " Tincani "
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Jo o José de Cunto
Tincani Fernando Félix
Revista Brasileira de Anestesiologia , 2004,
Abstract:
Design Method for Contra-Rotating Propellers for High-Speed Crafts: Revising the Original Lerbs Theory in a Modern Perspective
Stefano Brizzolara,Davide Grassi,Emilio P. Tincani
International Journal of Rotating Machinery , 2012, DOI: 10.1155/2012/408135
Abstract: The main theoretical and numerical aspects of a design method for optimum contrar-rotating (CR) propellers for fast marine crafts are presented. We propose a reformulated version of a well-known design theory for contra-rotating propellers, by taking advantage of a new fully numerical algorithm for the calculation of the mutually induced velocities and introducing new features such as numerical lifting surface corrections, use of an integrated modern cavitation/strength criteria, a modified method to consider different numbers of blades among the two propellers, and to allow for an unloading function in the search for the optimal circulation distribution. The paper first introduces the main theoretical principles of the new methods and then discusses the influence of the main design parameters on an emblematic example of application in the case of counter rotating propellers for a pod propulsor designed for fast planing crafts (35 knots and above). 1. Introduction In this last decade, the general interest in counterrotating propellers (CRPs) has increased and different manufacturers are developing new propulsion systems based on double propellers, especially for their use in fast planing crafts and pleasure yachts (0.5–2?MW), but also in larger vessels, in the high-power range (2–4?MW). Of course, there are other fields of applications where a CRP propulsion arrangement might be beneficial: for instance, electrical podded drives for large high-speed displacement navy ships or ro-ro ships for high-speed transportation. Despite this broad range of application, only a limited number of theoretical design methods have appeared in literature about contrarotating propellers; in fact, apart from different practical semiempirical approaches, the early method proposed by Morgan in 1960 remains still a valid option to design their optimum wake-adapted geometries. In this paper, we present the main theoretical elements of a modified CRP design method based on the general framework of Morgan but reformulated its most simplified passages, taking advantage of modern computational techniques, with the final intent to produce valid CRP designs for pod propulsors of high-speed planing crafts, as the one presented in Figure 1, designed to drive planing crafts at top speed of 35/45 knots with maximum input powers in excess of 1?MW. Figure 1: 4000 Large Pod, using contrarotating propellers designed with the presented method. The original design method initially developed by the authors [1] has been further developed and improved, over the years, in its theoretical aspects,
Critical properties of the band-insulator-to-Mott-insulator transition in the strong-coupling limit of the ionic Hubbard model
L. Tincani,R. M. Noack,D. Baeriswyl
Physics , 2009, DOI: 10.1103/PhysRevB.79.165109
Abstract: We investigate the neutral-to-ionic insulator-insulator transition in one-dimensional materials by treating a strong-coupling effective model based on the ionic Hubbard model using the density-matrix renormalization group and finite-size scaling. The effective model, formulated in a spin-one representation, contains a single parameter. We carry out an extensive finite-size scaling analysis of the relevant gaps and susceptibilities to characterize the two zero-temperature transitions. We find that the transition from the ionic band-insulating phase to an intermediate spontaneously dimerized phase is Ising, and the transition from the dimerized phase to the Mott-insulating phase is Kosterlitz-Thouless, in agreement with the field-theory-based predictions.
Antiphospholipid antibody: laboratory, pathogenesis and clinical manifestations
A. Tincani,C. Casu,S. Cartella,T. Ziglioli
Reumatismo , 2011, DOI: 10.4081/reumatismo.2010.65
Abstract: Antiphospholipid antibodies (aPL) represent a heterogeneous group of antibodies that recognize various antigenic targets including beta2 glycoprotein I (β2GPI), prothrombin (PT), activated protein C, tissue plasminogen activator, plasmin and annexin A2. The most commonly used tests to detect aPL are: lupus anticoagulant (LAC), a functional coagulation assay, anticardiolipin antibody (aCL) and anti-β2GPI antibody (anti-β2GPI), which are enzyme-linked immunoassay (ELISA). Clinically aPL are associated with thrombosis and/or with pregnancy morbidity. Apparently aPL alone are unable to induce thrombotic manifestations, but they increase the risk of vascular events that can occur in the presence of another thrombophilic condition; on the other hand obstetrical manifestations were shown to be associated not only to thrombosis but mainly to a direct antibody effect on the trophoblast.
Entropic analysis of quantum phase transitions from uniform to spatially inhomogeneous phases
?. Legeza,J. Sólyom,L. Tincani,R. M. Noack
Physics , 2006, DOI: 10.1103/PhysRevLett.99.087203
Abstract: We propose a new approach to study quantum phase transitions in low-dimensional fermionic or spin models that go from uniform to spatially inhomogeneous phases such as dimerized, trimerized, or incommensurate phases. It is based on studying the length dependence of the von Neumann entropy and its corresponding Fourier spectrum for finite segments in the ground state of finite chains. Peaks at a nonzero wave vector are indicators of oscillatory behavior in decaying correlation functions.
Utiliza??o da válvula unidirecional de tórax como sistema de drenagem no pós-operatório de ressec??es pulmonares
Vega, Nelson de Araujo;Ortega, Hugo Alejandro Vega;Tincani, Alfio José;Toro, Ivan Felizardo Contrera;
Jornal Brasileiro de Pneumologia , 2008, DOI: 10.1590/S1806-37132008000800004
Abstract: objective: to evaluate pleural drainage using a one-way flutter valve following elective lung resection. methods: this was a prospective study, with descriptive analysis, of 39 lung resections performed using a one-way flutter valve to achieve pleural drainage during the postoperative period. patients less than 12 years of age were excluded, as were those submitted to pneumonectomy or emergency surgery, those who were considered lost to follow-up and those in whom water-seal drainage was used as the initial method of pleural drainage. lung expansion, duration of the drainage, hospital stay and postoperative complications were noted. results: a total of 36 patients were included and analyzed in this study. the mean duration of pleural drainage was 3.0 ± 1.6 days. at 30 days after the surgical procedure, chest x-ray results were considered normal for 34 patients (95.2%). postoperative complications occurred in 8 patients (22.4%) and were related to the drainage system in 3 (8.4%) of those. conclusions: the use of a one-way flutter valve following elective lung resection was effective, was well tolerated and presented a low rate of complications.
Complica??es em lipoaspira??o clássica para fins estéticos
Franco, Fernando Fabrício;Basso, Rafael de Campos Ferreira;Tincani, Alfio José;Kharmandayan, Paulo;
Revista Brasileira de Cirurgia Plástica , 2012, DOI: 10.1590/S1983-51752012000100023
Abstract: liposuction for esthetic purposes aims to remove fat in healthy patients and reduce localized fat accumulation, called lipodystrophy, in order to improve body contour. in the last 3 decades, the liposuction technique has improved dramatically. however, like any other surgical procedure, it is not without complications. here, we reviewed the literature on pubmed to identify complications after classic liposuction performed solely for esthetic purposes. in total, 210 articles were found using the term "complication in liposuction," 86 with "complication after liposuction," 27 with "fat embolism after liposuction," 7 with "fat embolism following liposuction," and 16 with "deaths related to liposuction." among these articles, only 84 including cases of fat embolism after liposuction, visceral perforation, vascular injury, blindness, and herpes zoster infection among others were considered to be related to the subject. based on the analyzed articles, we can conclude that liposuction is a highly effective procedure when well indicated and performed accurately. despite this, there are inherent risks. this review found many articles addressing complications, predominantly pulmonary fat embolism, after liposuction for esthetic purposes.
A drenagem pleural pré-hospitalar: apresenta??o de mecanismo de válvula unidirecional
Lima, Alexandre Garcia de;Toro, Ivan Felizardo Contrera;Tincani, Alfio José;Barreto, Gilson;
Revista do Colégio Brasileiro de Cirurgi?es , 2006, DOI: 10.1590/S0100-69912006000200009
Abstract: background: the purpose of this study is to present an one-way valve mechanism to replace the underwater seal for pleural drainage, currently used in the prehospital attendance, as well as document preliminary results of its initial use at samucampinas/ sp/brasil. methods: twenty two pleural drains with the valve were carried out, all of these in prehospital environment, in patients who suffered thoracic trauma or spontaneous pneumothorax, in a prospective not randomized trial. results: the total volume output drained through the valve ranged from 0 to 1500 ml, mean 700 ± 87,4 ml, in an average time lag of 18 minutes (± 1,1 minutes - ranging from 8 to 26 minutes). the initial and final cardiac frequency was 120 ± 2,7 bpm and 100 ± 2 bpm (p 0,00), respectively , whereas the initial respiratory frequency was 24 ± 0,8 ipm and the final was 15 ± 0,3 ipm (p 0,03). only two mechanical failures were registered, one of which was corrected by the substitution of the defective valve, showing a 95,4% success ratio. conclusion: taking into account the initial and final physical examination, as well as the output quantification, it can be concluded that the valve is efficient and functional, and safe in the pre-hospital emergencies.
Melanoma ganglionic metastasis 30 years after treatment of the primary tumor: a case report
Tincani, Alfio José;Martins, Antonio Santos;Lage, Henriette de Toledo;Souza, Lincoln Santos;
Sao Paulo Medical Journal , 1996, DOI: 10.1590/S1516-31801996000200005
Abstract: the recurrence of melanoma in patients is well-documented, and is dependent on a number of factors. we report a case in which a patient had a case of ganglionar metastasis in the neck after a 30-year disease-free interval following primary treatment.
Lingual thyroid causing dysphonia: case report
Tincani, Alfio José;Martins, Antonio Santos;Del Negro, André;Araújo, Priscila Pereira Costa;Barretto, Gilson;
Sao Paulo Medical Journal , 2004, DOI: 10.1590/S1516-31802004000200007
Abstract: context: lingual thyroid gland is a rare clinical entity that is caused by the failure of the thyroid gland to descend to a normal cervical location during embryogenesis. the occurrence of an ectopic thyroid gland located at the base of the tongue may cause problems for the patient, with symptoms of dysphagia, dysphonia, upper airway obstruction or even hemorrhage at any time from infancy through adulthood. case report: we report on a case of lingual thyroid gland in a 41-year-old female patient. the embryology and diagnosis of ectopic thyroid are discussed and its management is outlined. features of the diagnostic and therapeutic evaluation are described with attention to the clinical findings, laboratory tests, thyroid scan and computed tomography imaging studies employed in the confirmation of diagnosis and planning of appropriate treatment. the history of the condition is reviewed and a treatment strategy is outlined. surgical excision of the gland is reserved for cases of gland enlargement that result in compromised airways (dysphagia or dysphonia) or recurrent hemorrhage.
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