Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2020 ( 2 )

2019 ( 199 )

2018 ( 249 )

2017 ( 255 )

Custom range...

Search Results: 1 - 10 of 195909 matches for " Ocarina Castillo D'Imperio "
All listed articles are free for downloading (OA Articles)
Page 1 /195909
Display every page Item
Rese a "Discursos del poder. Usos y abusos de la razón política" de Miguel Albujas D.; Carlos Kohn W.; Rafael García Torres; Corina Yoris Viillasana y Omar Astorga
Ocarina Castillo D'Imperio
Utopia y Praxis Latinoamericana , 2012,
Jornadas de Investigación Estudiantil Sapienza
Ocarina Castillo D'Imperio
Revista Venezolana de Análisis de Coyuntura , 2012,
Un recuerdo para Josefina Ríos de Hernández
Cuadernos del Cendes , 2007,
Fluctuations and Pattern Formation in Fluids with Competing Interactions
A. Imperio,D. Pini,L. Reatto
Physics , 2007,
Abstract: One of the most interesting phenomena in the soft-matter realm consists in the spontaneous formation of super-molecular structures (microphases) in condition of thermodynamic equilibrium. A simple mechanism responsible for this self-organization or pattern formation is based on the competition between attractive and repulsive forces with different length scales in the microscopic potential, typically, a short-range attraction against a longer-range repulsion. We analyse this problem by simulations in 2D fluids. We find that, as the temperature is lowered, liquid-vapor phase separation is inhibited by the competition between attraction and repulsion, and replaced by a transition to non-homogeneous phases. The structure of the fluid shows well defined signatures of the presence of both intra- and inter-cluster correlations. Even when the competition between attraction and repulsion is not so strong as to cause microphase formation, it still induces large density fluctuations in a wide region of the temperature-density plane. In this large-fluctuation regime, pattern formation can be triggered by a weak external modulating field.
Bidimensional fluid system with competing interactions
A. Imperio,L. Reatto
Physics , 2004,
Abstract: In this paper we present a study of pattern formation in bidimensional systems with competing short-range attractive and long-range repulsive interactions. The interaction parameters are chosen in such a way to analyse two different situations: the spontaneous pattern formation due to the presence of strong competing interactions on different length scales and the pattern formation as a response to an external modulating potential when the system is close to its Lifshitz point. We compare different Monte Carlo techniques showing that Parallel Tempering technique represents a promising approach to study such systems and we present detailed results for the specific heat and the structural properties. We also present random phase approximation predictions about the spontaneous pattern formation (or microphase separation), as well as linear response theory predictions about the induced pattern formation due to the presence of an external modulating field. In particular we observe that the response of our systems to external fields is much stronger compared to the response of a Lennard-Jones fluid.
Microphase morphology in two dimensional fluids under lateral confinement
A. Imperio,L. Reatto
Physics , 2007, DOI: 10.1103/PhysRevE.76.040402
Abstract: We study the effects of confinement between two parallel walls on a two dimensional fluid with competing interactions which lead to the formation of particle micro-domains at the thermodynamic equilibrium (microphases or microseparation). The possibility to induce structural changes of the morphology of the micro-domains is explored, under different confinement conditions and temperatures. In presence of neutral walls, a switch from stripes of particles to circular clusters (droplets) occurs as the temperature decreases, which does not happen in bulk. While the passage from droplets to stripes, as the density increases, is a well known phenomenon, the change of the stripes into droplets as an effect of temperature is rather unexpected. Depending on the wall separation and on the wall-fluid interaction parameters, the stripes can switch from parallel to perpendicular to the walls and also a mixed morphology can be stable.
Obstru??o de valva mitral por emboliza??o tumoral per-operatória (pneumectomia direita) com parada cardíaca irreversível
Haddad, Rui;Boasquevisque, Carlos Henrique Ribeiro;Ferreira, Tadeu Diniz;Reis, Mario Celso Martins;Teixeira, Fernando D'Imperio;
Jornal Brasileiro de Pneumologia , 2008, DOI: 10.1590/S1806-37132008000700015
Abstract: a 26-year-old patient with a voluminous primary pulmonary hemangiopericytoma in the right lung, diagnosed through previous surgical biopsy, presented irreversible cardiac arrest during the hilar dissection portion of a right pneumonectomy. the patient did not respond to resuscitation efforts. autopsy showed total obstruction of the mitral valve by a tumor embolism. in cases of large lung masses with hilar involvement, as in the case presented, we recommend preoperative evaluation using transesophageal echocardiography, magnetic resonance imaging or angiotomography. if injury to the pulmonary vessels or atrial cavities is detected, surgery with extracorporeal circulation should be arranged in order to allow resection of the intravascular or cardiac mass, together with pulmonary resection. we recommend that care be taken in order to recognize and treat this problem in patients not receiving a preoperative diagnosis.
V-region-related and -unrelated immunosupression accompanying infections
Arala-Chaves, Mario;Lima, M. Regina D'Imperio;Coutinho, Antonio;Penna-Rossi, Claudia;Minoprio, Paola;
Memórias do Instituto Oswaldo Cruz , 1992, DOI: 10.1590/S0074-02761992000900005
Abstract: this paper discusses current evidence for the relationship between polyclonal lymphocyte activation, specific immunossupression with decreased resistance, and autoimmune pathology, that are all often found associated with infections by a variety of virus, bacteria and parasites . the central question of class determination of immune effector activities is considered in the context of the cellular targets for nonspecific mitogenic activities associated with infection. a model is presented to integrate these findings: mitogenens produced by the microorganism or the infected cells are preferentially active on cd5 b cells, the resulting over-production of il-10 will tend to bias all immune activities in to a th-2mode of effector functions, with high titers of polyclonal antibodies and litle or no production of gamma ifn and other "inflamatory"lymphokines that often mediate resistance. in turn these conditions allow for parasite persistence and the corresponding long-term disregulation of self-directed immune reactivities, resulting in autoimmunity in the chronic phase. this model would predict that selective immunization with the mitogenic principles involved in desregulation, could stand better chances than strategies of vaccination based on immunopotentiation against othere, functionally neutral antigenic epitopes. it is argued, however, that the complexity of immune responses and their regulation together with our ignorance on the genetic controls of class-determination, offer poor prospects for a scientifically-based, rational development of vaccines in the near future. it is suggested that empirically-based and technologically developed vaccines might suceed, while basic scientific approaches are reinforced and given the time provide a better understanding of those process.
Dídimo Castillo F.
Papeles de población , 2002,
Dídimo Castillo F.
Papeles de población , 2003,
Page 1 /195909
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.