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Search Results: 1 - 10 of 7718 matches for " Rodolfo Rodriguez "
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Learning Pharmacology in Mexico: A Survey of the Use and Views of Pharmacology Textbooks by Undergraduate Medical Students  [PDF]
Rosa Ventura-Martinez, Rebeca Aguirre-Hernandez, Jacinto Santiago-Mejia, Claudia Gomez, Rodolfo Rodriguez
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.51009
Abstract:

Background: To date, little is known about the view of medical students towards pharmacology textbooks. This study aimed to investigate the preferences of second-year medical students towards pharmacology textbooks, and to identify the factors involved in book selection. Methods: Second-year medical students of the Medical School at the National University of Mexico (classes of 2010, 2011, and 2012) were asked to select their preferred textbook for studying pharmacology and preparing for exams from a list of nine textbooks. They also completed a 19-item questionnaire to identify and evaluate the reasons for their preferences. Results: A total of 1323 students completed the questionnaire, representing 45.59% of all medical students enrolled in 2010-2012. The two textbooks most preferred by students were Goodman & Gilman (25.3%) and Rodriguez et al. (27.3%); preferences for the other books were Harvey & Champe (13.9%), Rang et al. (13.5%), or Katzung et al. (12.3%), and others (7.6%). The usefulness and the adequacy of content were deemed equally important by students when choosing a textbook. Conclusions: Goodman & Gilman, a well-known pharmacology textbook, and Rodriguez et al., a small-volume textbook, were preferred by these second-year medical students; their choices were based on relevant pharmacological information and adequacy of content.

Evaluation of Consistency of the Knowledge in Agents
Meliza Contreras,Miguel Rodriguez,Pedro Bello,Rodolfo Aguirre
Acta Universitaria , 2012,
Abstract: Given a set of agents with valid previous knowledge bases, we wish to know how new knowledge affects each agent. To model the new knowledge, boolean logic is used, expressed by 2CNF clauses, to reduce the complexity. Upon recieving new knowledge, one or more agents may find it inconsistent with their previous knowledge base, so a mechanism is applied which removes knowledge by using a contraction operation, described by the AGM model. The goal is to determinate if that contradicting knowledge significantly affects the set of beliefs of each agent. Further more, a problem is modeled in which, given a set of agents and their knowledge base, some clauses representing new knowledge are added with the aim of determining which agent is the most affected, due to contradiction with the previous knowledge. Dado un conjunto de agentes con una base previa de conocimiento, se desea saber cómo el nuevo conocimiento afecta a todos los agentes. Para modelar el nuevo conocimiento, se utilizóla lógica booleana, expresada mediante clausulas 2CNF, para reducir la complejidad. Mediante la incorporación de nuevo conocimiento en los agentes, éstos podrían ser afectados de tal forma que su base de conocimiento sea inconsistente, por tanto se aplica un mecanismo, el cual elimina conocimiento mediante el uso de una operación de contracción, descrita por el modelo AGM. El objetivo es determinar si un conocimiento con contradicciones afecta significativamente al conjunto de creencias de cada agente. Por lo tanto, se modela un problema en el cual, dado un conjunto de agentes y su conocimiento base, se agregan algunas cláusulas que representan nuevo conocimiento con el objetivo de determinar cuál agente es el más afectado debido a una contradicción con el conocimiento previo.
Super-roughening versus intrinsic anomalous scaling of surfaces
Juan M. Lopez,Miguel A. Rodriguez,Rodolfo Cuerno
Physics , 1997, DOI: 10.1103/PhysRevE.56.3993
Abstract: In this paper we study kinetically rough surfaces which display anomalous scaling in their local properties such as roughness, or height-height correlation function. By studying the power spectrum of the surface and its relation to the height-height correlation, we distinguish two independent causes for anomalous scaling. One is super-roughening (global roughness exponent larger than or equal to one), even if the spectrum behaves non anomalously. Another cause is what we term an intrinsically anomalous spectrum, in whose scaling an independent exponent exists, which induces different scaling properties for small and large length scales (that is, the surface is not self-affine). In this case, the surface does not need to be super-rough in order to display anomalous scaling. In both cases, we show how to extract the independent exponents and scaling relations from the correlation functions, and we illustrate our analysis with two exactly solvable examples. One is the simplest linear equation for molecular beam epitaxy , well known to display anomalous scaling due to super-roughening. The second example is a random diffusion equation, which features anomalous scaling independent of the value of the global roughness exponent below or above one.
Bounds for FCNC and the Pseudoscalar Higgs mass in the General Two Higgs Doublet Model type III using $g-2$ muon factor
Rodolfo A. Diaz,R. Martinez,J. -Alexis Rodriguez
Physics , 2001,
Abstract: Current muon anomalous magnetic moment data have challenged the SM, and seems to open a window to new Physics. Since the difference between SM and experimental predictions is approximately $2.6\sigma$. In the framework of the General Two Higgs Doublet Model (2HDM), we calculate the muon anomalous magnetic moment to get lower and upper bounds for the Flavor Changing Yukawa couplings (FC) in the leptonic sector. We also obtain lower bounds for the mass of the Pseudoscalar Higgs ($m_{A^ 0}$, as a function of the parameters of the model.
The rare decay $t \to c γ$ in the General 2HDM type III
Rodolfo A. Diaz,R. Martinez,J-Alexis Rodriguez
Physics , 2001,
Abstract: We consider the branching ratio for the process $t \to c \gamma$ in the context of the General Two Higgs Doublet Model type III. We find that taking into account reasonable values for the parameter $\tan \beta$ is possible to get values of this branching ratio up to orders of magnitude lying in the range of sensitivity of near future top quark experiments. For values of $B(t \to c \gamma) \sim 1-9 \times 10^{-5}$, values between 8-15 for $\tan \beta$ are allowed.
Bounds for Lepton Flavor Violation and the Pseudoscalar Higgs in the General Two Higgs Doublet Model using $g-2$ muon factor
Rodolfo A. Diaz,R. Martinez,J. -Alexis Rodriguez
Physics , 2000, DOI: 10.1103/PhysRevD.64.033004
Abstract: Current experimental data from the $g-2$ muon factor, seems to show the necessity of physics beyond the Standard Model (SM), since the difference between SM and experimental predictions is 2.6$\sigma $. In the framework of the General Two Higgs Doublet Model (2HDM), we calculate the muon anomalous magnetic moment to get lower and upper bounds for the Flavour Changing (FC) Yukawa couplings in the leptonic sector. We also obtain lower bounds for the mass of the pseudoscalar Higgs ($m_{A^0}$) as a function of the parameters of the model.
The circular Kardar-Parisi-Zhang equation as an inflating, self-avoiding ring polymer
Silvia N. Santalla,Javier Rodriguez-Laguna,Rodolfo Cuerno
Physics , 2013, DOI: 10.1103/PhysRevE.89.010401
Abstract: We consider the Kardar-Parisi-Zhang (KPZ) equation for a circular interface in two dimensions, unconstrained by the standard small-slopes and no-overhang approximations. Numerical simulations using an adaptive scheme allow us to elucidate the complete time evolution as a crossover between a short-time regime with the interface fluctuations of a self-avoiding ring or 2D vesicle, and a long-time regime governed by the Tracy-Widom distribution expected for this geometry. For small noise amplitudes, scaling behavior is only of the latter type. Large noise is also seen to renormalize the bare physical parameters of the ring, akin to analogous parameter renormalization for equilibrium 3D membranes. Our results bear particular importance on the relation between relevant universality classes of scale-invariant systems in two dimensions.
Intrinsic geometry approach to surface kinetic roughening
Javier Rodriguez-Laguna,Silvia N. Santalla,Rodolfo Cuerno
Physics , 2011, DOI: 10.1088/1742-5468/2011/05/P05032
Abstract: A model for kinetic roughening of one-dimensional interfaces is presented within an intrinsic geometry framework that is free from the standard small-slope and no-overhang approximations. The model is meant to probe the consequences of the latter on the Kardar-Parisi-Zhang (KPZ) description of non-conserved, irreversible growth. Thus, growth always occurs along the local normal direction to the interface, with a rate that is subject to fluctuations and depends on the local curvature. Adaptive numerical techniques have been designed that are specially suited to the study of fractal morphologies and can support interfaces with large slopes and overhangs. Interface self-intersections are detected, and the ensuing cavities removed. After appropriate generalization of observables such as the global and local surface roughness functions, the interface scaling is seen in our simulations to be of the Family-Vicsek type for arbitrary curvature dependence of the growth rate, KPZ scaling appearing for large sytems sizes and sufficiently large noise amplitudes.
Intraseasonal characterization of tropospheric O3 in the North of the Buenos Aires Province: determining four months cycle and teleconnection evidence
Rodolfo G. Cionco,Rubén Rodriguez,Nancy Quaranta,Eduardo Agosta
Physics , 2013,
Abstract: Tropospheric ozone (O3T) is a secondary pollutant whose formation involved primarily solar radiation, NOx and volatile organic compounds. The North of the Buenos Aires Province has great agricultural-industrial activity; therefore, O3T study is an important issue in the area. In this paper, we present the first results tend to estimate and characterize O3T in San Nicol\'as de los Arroyos, North of Buenos Aires. Due to a lack of in situ data, we analyse the observations of the instrument OMI (Ozone Monitoring Instrument) of land remote sensing satellite AURA (GSFC/NASA). The data cover the years 2004-2013. Applying the multitaper technique (MTM), very suitable for short and noisy data series, spectral analysis is performed on a grid corresponding 1{\deg} in latitude by 1.5{\deg} in longitude, centred South of the Province of Santa Fe. The most remarkable result is the emergence of a significant peak (95%) of four months cycle. To test the validity of this signal in San Nicol\'as, daily solar radiation data (Q) were analysed in the area. The application of MTM to the daily values of Q, yields a spectral peak of 120 days. It is concluded that atmospheric opacity on the site has four months variations that modify the solar radiation at the troposphere, and consequently, the production rate of O3T. Evidence that these variations are due to teleconnection process originated in the Maritime Continent are presented.
Reflexiones sobre los Tribunales de las Oposiciones Universitarias
Vazquez Mata,Guillermo; Rodriguez Castro,Felipe; Alcaraz Sala,Rodolfo; Novoa Mogollon,Francisco Javier; Gurgui Ferrer,Mercedes; Santos Rodriguez,Miguel; Vazquez Rodriguez,Juan José;
Educación Médica , 2006, DOI: 10.4321/S1575-18132006000300003
Abstract: medicine is undergoing clinical, therapeutic and technological changes, and this is coinciding with demographic, cultural and epidemiological variations. these factors, and the speed with which innovations occur in all fields, requires a rethink of doctors' training, not only during their initial university studies but also throughout their professional life. those responsible for appointing medical school lecturers must take into account all these aspects in order to ensure that the teaching staff of the future will transmit these values to students. in turn, candidates must be aware of the key aspects around which they should develop their curriculum.
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