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Search Results: 1 - 10 of 401297 matches for " M. Cerrada "
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Anafilaxia y quiste hidatídico
Cerrada Cerrada,E.; López Olmeda,C.; Gómez Rodríguez,B. M.; Eixarch Alias,A.;
Medifam , 2002, DOI: 10.4321/S1131-57682002000600004
Abstract: hidatidosis is an endemic disease in the mediterranean area, but his presentation as anaphylactic shock only takes place in a rare percentage, oscillating between 1 and 7.5%. this manifestation occurs when the hydatid cyst breaks, liberating his content to the outside. the etiologic diagnosis is easy when the shock takes place during the surgical manipulation of the hydatid cyst, but the difficulty comes up when it occurs because of the spontaneus rupture of it. it must be suspected in healthy patients living in endemic areas and who show a sudden pattern of vascular collapse. these patients rarely have a previous record of hydatic cysts, but their clinical history usually shows the existence of a previous record of non-filiated allergic processes.
Manejo de la dermatitis atópica en Atención Primaria
Méndez-Cabeza Velázquez,J.; Alache Zú?iga,H.; Cerrada Cerrada,E.;
Medifam , 2003, DOI: 10.4321/S1131-57682003000200003
Abstract: atopic dermatitis (eczema) is a chronic skin disorder. it is of inflammatory nature and causes excessive itchness. it shows morfhological changes according to the age and time of evolution with an important family history component. its diagnosis is fundamentally clinical and pharmacological and non pharmacological methods are used in its treatment. in relation to this, the family physicians must know the different topical treatments necessary to maintain and adecuate skin hidratation for breaking the cycle of itching and scratching of this illness.
Time-varying non-linear system identification using dynamical adaptive fuzzy systems
Cerrada,M.; Aguilar,J.; Colina,E.; Titli,A.;
Revista Técnica de la Facultad de Ingeniería Universidad del Zulia , 2002,
Abstract: abstract in processes control, it is required to have a model that describes the process behaviour. identification techniques provide an approximate representation of the real system behaviour, by using a linguistic or mathematical expression, or an algorithm. in this work, a dynamical adaptive fuzzy model is used in order to propose the input-output identification model of a time-varying non-linear system. this class of fuzzy models permit a generic adaptive approach of the process behaviour through the adaptation of the membership functions to the universes of discourse of the model variables.
Identificación de un sistema no lineal variante en el tiempo usando sistemas difusos adaptativos dinámicos Time-varying non-linear system identification using dynamical adaptive fuzzy systems
M. Cerrada,J. Aguilar,E. Colina,A. Titli
Revista Técnica de la Facultad de Ingeniería Universidad del Zulia , 2002,
Abstract: Resumen Para realizar las tareas de control de procesos se requiere de un modelo que describa el comportamiento aproximado del proceso en particular bajo estudio. Las técnicas de identificación proporcionan una representación del comportamiento de un sistema real, basándose en una expresión lingüística, matemática o un algoritmo. En este trabajo se propone el uso de modelos difusos adaptativos dinámicos para la obtención de un modelo de identificación entrada-salida de un sistema no lineal variante en el tiempo. La ventaja de usar esta clase de modelos difusos es la de obtener un aproximación genérica del comportamiento del proceso a identificar a partir de la adaptación constante de las funciones de membresía de sus variables sobre todo el universo de discurso. Abstract In processes control, it is required to have a model that describes the process behaviour. Identification techniques provide an approximate representation of the real system behaviour, by using a linguistic or mathematical expression, or an algorithm. In this work, a dynamical adaptive fuzzy model is used in order to propose the input-output identification model of a time-varying non-linear system. This class of fuzzy models permit a generic adaptive approach of the process behaviour through the adaptation of the membership functions to the universes of discourse of the model variables.
Resistencia de Serratia marcescens a los antimicrobianos en Venezuela
Brito,A; Pérez,J; Andrade,E; Cerrada,O; Tovar,L; Guzmán,M; Carmona,O;
Revista de la Sociedad Venezolana de Microbiología , 2000,
Abstract: abstract we studied the resistance to antimicrobial agents of 659 strains of serratia marcescens from the survey project control of resistance to antimicrobial agents in venezuela during the period 1995 to 1998, following the agar diffusion method according to the nccls standards. serratia marcescens showed a high percentage of resistance to ampicillin and ampicillin-sulbactam, 84-92% and 73-80% respectively; to piperacillin there was a much lower percentage (13-26%). to the third generation cephalosporins the resistance reported was as follows: ceftriaxone 20%, ceftazidime 15%, cefotaxime 23% and cefoperazone 16%. to cefepime, a fourthgeneration cephalosporin, there was reported a low percentage of resistance (6%). the resistance reported to gentamicin and amikacine is high (21 and 19%) respectively, and lower for tobramycin (11%). the resistance to quinolones is low, with values ranging from 2 to 5%. the higher percentage of resistance reported for third generation of cephalosporins it is due to the production of b-lactamases of expanded-spectrum
CONVENTIONAL DYNAMIC VOLTAGE RESTORER (DVR) FOR MITIGATION OF VOLTAGE SAG IN POWER DISTRIBUTION SYSTEMS
Shazly A. Mohammed,Aurelio G. Cerrada,Abdel-Moamen M. A,B. Hasanin
International Journal of Advances in Engineering and Technology , 2013,
Abstract: Voltage sag is a common and undesirable power quality phenomenon in the distribution systems which put sensitive loads under the risk. Dynamic voltage restorer (DVR) can provide the most commercial solution to mitigate voltage sag by injecting voltage as well as power into the system. This paper presents the application of dynamic voltage restorer (DVR) on power distribution systems for mitigation of voltage sags at critical loads. In this paper, an overview of the DVR, its functions, configurations, components, compensating strategies and control methods are reviewed along with the device capabilities and limitations. The proposed control scheme is very effective to detect any disturbance in power systems. Simulation results using MATLAB/Simulink software are presented to verify the effectiveness of the proposed scheme.
Electromagnetic Shielding Features in Lightweight Pvdf-Aluminum Based Nanocomposites
Javier Arranz-Andres;Nuria Pulido-Gonzalez;Pilar Marín;Ana M. Aragon;Maria L. Cerrada
PIER B , 2013, DOI: 10.2528/PIERB12121109
Abstract: Dependence of the electromagnetic shielding effectiveness on filler volume fraction has been investigated from attenuation upon reflection measurements over a broad frequency range in hybrids based on Poly(vinylidene fluoride)-Aluminum nanoparticles. The loss of reflectivity with relation to the incident radiation in these nanocomposites compared with the pristine polymeric matrix shows the maximum value for the sample with an aluminum content of 10% in volume. Furthermore, the morphological aspects of all the specimens as well as their thermal properties, viscoelastic behavior and dielectric response have been evaluated. The nanocomposite that incorporates an Al content of 10% in volume exhibits the best balance in properties including, in addition to its shielding behavior, its processability and mechanical performance.
Efectividad del sildenafilo en Atención Primaria
Cerrada Cerrada,E.; O'Connor Basalo,I.; García de Blas González,F.; Caballero Gallego,A. J.; Cura González,I. del; Barajas Gutiérrez,M. A.; García Sánchez,G.;
Medifam , 2001, DOI: 10.4321/S1131-57682001000700003
Abstract: backgrounds: there aren′t studies about efectiveness of sildenafil in primary health care. objectives: to evaluate the effectiveness of sildenafil citrate (viagratm) in men with erectile dysfunction (ed) through a questionnaire and a global efficacy question, and their couples' satisfaction degree. design: non-aleatory before-after interventional study. location: urban primary care center. patients: men = 18 years with ed of 6 months or longer. methods: socio-demographical variables, associated diseases, ed degree -through the administration before and after treatment of the erectile function field of the international index of erectile function (iief) and an after treatment global efficacy question- and a before and after treatment question about their couples' satisfaction degree, were measured. the wilcoxon test was used to evaluate the improvement at the questionnaire score. results: initially, 45 men accepted to participate in the study, with a mean age of 56,8 years (ci 95%: 32,6-81); 11 with mild ed, 21 moderate and 13 severe. twelve rejected to follow the treatment; five of them were afraid of adverse effects. the 33 subjects that finished the study presented an initial iief mean value of 12,73 (ci 95%: 11,22-14,24) and at the end an iief score of 24 (ci 95%: 21,47-26,53). this improvement was statistically significant (p<0,0001). twenty-eight experienced subjective improvement. three patients suffered headache and 2 flush. twenty of the 23 mates (all women) that participated in the study referred increase in their sexual satisfaction degree. conclusions: sildenafil has demonstrated to be effective in our study population, as it was in other studies though the limitations of the design and size of the study.
El PAN en la coyuntura actual. Una mirada desde dentro
Federico A. Ling Sanz Cerrada
El Cotidiano , 2008,
Abstract: Por qué el PAN es catalogado como un partido de derecha, si su doctrina dista de serlo? La respuesta es simple: una cosa es la doctrina que el partido adopta y otra muy diferente aquella que adoptan sus militantes y aquella que sus miembros activos predican. Los pilares del humanismo pueden tener tintes de centro izquierda, pero las personas que militan activamente en Acción Nacional corresponden y encajan en otro perfil, más conservador, y por lo tanto son catalogados como personas de la derecha. No se está diciendo que no lo sean, simplemente, habría que entender entonces la diferencia entre la persona y la institución.
Matricial representation of period doubling cascade
Lucia Cerrada,Jesus San Martin
Physics , 2010,
Abstract: Starting from the cycle permutation sigma_(2^k) associated with the (2^k)-periodic orbit of the period doubling cascade we obtain the inverse permutation (sigma_(2^k))^-1. Then we build a matrix permutation related to (sigma_(2^k))^-1, which includes the visiting order of the (2^k)-periodic orbit points. After some manipulations a recurrence relation of matricial representation of period doubling cascade is obtained. Finally the explicit matricial representation is reached.
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