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Search Results: 1 - 10 of 53564 matches for " Vasquez Carlos Escobar "
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Réplica: meningite após técnica combinada para analgesia de parto. Relato de caso
Vasquez Carlos Escobar,Pereira Raquel da Rocha
Revista Brasileira de Anestesiologia , 2002,
Construcción de un magnetómetro elemental
Carlos Alberto Vasquez
Revista Eureka sobre Ense?anza y Divulgación de las Ciencias , 2007,
Abstract: Earth Magnetic Field; cheap magnetometer
Three-dimensional Ising model confined in low-porosity aerogels: a Monte Carlo study
Ricardo Paredes,Carlos Vasquez
Physics , 2006, DOI: 10.1103/PhysRevB.74.054201
Abstract: The influence of correlated impurities on the critical behaviour of the 3D Ising model is studied using Monte Carlo simulations. Spins are confined into the pores of simulated aerogels (diffusion limited cluster-cluster aggregation) in order to study the effect of quenched disorder on the critical behaviour of this magnetic system. Finite size scaling is used to estimate critical couplings and exponents. Long-range correlated disorder does not affect critical behavior. Asymptotic exponents differ from those of the pure 3D Ising model (3DIS), but it is impossible, with our precision, to distinguish them from the randomly diluted Ising model (RDIS).
Right-handed lepton mixings at the LHC
Juan Carlos Vasquez
Physics , 2014,
Abstract: We study how the elements of the leptonic right-handed mixing matrix can be determined at the LHC in the minimal Left-Right symmetric extension of the standard model. We do it by explicitly relating them with physical quantities of the Keung-Senjanovi\'c process and the lepton number violating decays of the right doubly charged scalar. We also point out that the left and right doubly charged scalars can be distinguished at the LHC, without measuring the polarization of the final state leptons coming from their decays.
Effects of aerogel-like disorder on the critical behavior of O(m)-vector models. Recent simulations and experimental evidences
Carlos Vasquez,Ricardo Paredes
Physics , 2006,
Abstract: We review some results on the effect of a specific type of quenched disorder on well known O(m)-vector models in three dimension. Evidences of changes of criticality in both systems, when confined in aerogel pores, are briefly referenced. The 3DXY model (m=2) represents the universality class to which the \lambda-transition of bulk superfluid $^4$He belongs. Experiments report changes of critical exponents for this transition, when superfluid $^4$He is confined in aerogels. Numerical results of the 3DXY model, confined in aerogel-like structures, are in agreement with experiments. Both results seem to contradict Harris criterion: being the specific heat exponent negative for the pure system, changes must be explained in terms of the extended criterion due to Weinrib and Halperin, which requires disorder to be long-range correlated (LRC) at all scales. Aerogels are fractal through some decades only, and present crossovers to homogeneous regimes at finite scales, so the violation to Harris criterion persists. The apparent violation has been explained in terms of hidden LRC subsets within aerogels $[$Phys. Rev. Lett., 2003, {\bf 90}, 170602$]$. On the other hand, experiments on the liquid-vapor (LV) transition of $^4$He and N$_2$ confined in aerogels, also showed changes in critical-point exponents. Being the LV critical-point in the O(1) universality class, criticality may be affected by both, short-range correlated (SRC) and LRC subsets ofdisorder. Simulations of the 3DIS in DLCA aerogels can corroborate experimental results. Experiments and simulations both suggest a shift in critical exponents to values closer to the SRC instead of those of the LRC fixed point.
On the abundance of non-zero central Lyapunov exponents, physical measures and stable ergodicity for partially hyperbolic dynamics
Vitor Araujo,Carlos H. Vasquez
Mathematics , 2010,
Abstract: We show that the time-1 map of an Anosov flow, whose strong-unstable foliation is $C^2$ smooth and minimal, is $C^2$ close to a diffeomorphism having positive central Lyapunov exponent Lebesgue almost everywhere and a unique physical measure with full basin, which is $C^r$ stably ergodic. Our method is perturbative and does not rely on preservation of a smooth measure.
Las Clasificaciones en Medicina Arbitrariedad y Entes innecesarios
Iatreia , 2003,
Abstract: although classification in medicine is a proven tool useful in the understanding and management of illnesses since antiquity, nowadays there is a tendency to overestimate its role in diagnosis and treatment. the author considers that aspects such as cultural, philosophical, and medical reasons should be appraised from a local perspective to avoid the very common mistake of practicing a medicine based on factors that are only functional when applied in the locality of origin.
William Harvey: la circulación sanguínea y algunos de sus obstáculos epistemológicos
Escobar Gónima,Carlos;
Iatreia , 2006,
Abstract: this paper emphasizes on the importance of william harvey as a precursor of the experimental method in medicine. it describes some of the epistemological obstacles he had to face in the elaboration of his theory of blood circulation, contradicting the galenical theory on the subject that was accepted as a doctrine at his time.
Escobar,Juan; Coronado,Carlos;
CT&F - Ciencia, Tecnología y Futuro , 2006,
Abstract: this paper explains a new method of super-accelerated successive substitution (sass) for saturation pressure calculation, in multi-component mixtures of reservoir fluids and synthetic mixtures. the new iterative scheme is characterized by its speed and convergence, even in the critical region. it is easy to implement since it iterates on a single variable, the pressure. in order to demonstrate and to prove the applicability of the new method thirteen samples of fluids were chosen, covering mostly, the most common ranges composition - pressure - temperature (including the critical region) found in phase equilibrium problems in the petroleum industry. this sass method was compared with other bubble point and dew point calculation methods; such as conventional successive substitution (css) and accelerated successive substitution (ass), and it showed to be faster and more reliable.
Direitos Humanos: com Marx
Escobar, Carlos Henrique;
Psicologia Clínica , 2008, DOI: 10.1590/S0103-56652008000200004
Abstract: many forms of struggle &- like human rights &- that do not have as their goal the reproduction of capital, can take on different forms and allow different usages. from a radical point of view, they should not amount to politics or to revolution, and it is necessary to interpret them in their conjunctures and together with other ideas. none of this is difficult to evaluate if we accompany its origin and its history. to this we add a recapture of marxist ideas, even though with reformulations and new contributions, particularly in what marx himself privileges, by saying that he was not marxist and that his thought was not about that, but regarding anything that could come closer to the roots of history.
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