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Search Results: 1 - 10 of 223108 matches for " Díaz Hernández "
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On α-Weyl Operators  [PDF]
Slavi?a V. Djordjevi?, Fernando Hernández-Díaz
Advances in Pure Mathematics (APM) , 2016, DOI: 10.4236/apm.2016.63011
Abstract: The purpose of this article is to present Schechter’s manner to introduce α-Wayl operators and compare this definition with another one given by Yadav and Arora. Moreover, we introduce generalized Weyl operator in the way that we keep many properties of the class of Weyl operators.
Método red como alternativa en el tratamiento del linfedema posmastectomía
Díaz Hernández,Orestes;
Revista Cubana de Cirug?-a , 2000,
Abstract: a review, analysis and study of 126 women with postmastectomy lymphedema was conducted during 7 years, the treatment consisted in recommendations for those whe had undergone mastectomy, a device to facilitate the lymphatic drainage and exercise therapy. of the total of patients, 25 died during the study and 35 gave it up. the other 66 received attention and treatment at the outpatient department. the control of the volume of their arms was carried out by volumetries with a device designed to this end. patients were classified according to the volume. 12 of them were in the first stage (mild edema), 19 in the second stage (moderate edema) and 35 in the third stage (severe edema). red method was the name used to carry out this research and treatment. according to the results, 42.8 % of the patients who were in the third stage passed to the second stage, 52.6 % that were in the second stage passed to the first stage, and 66. 6 % of the first stage had practically no edema. 50 % improved completely
Método red como alternativa en el tratamiento del linfedema posmastectomía
Orestes Díaz Hernández
Revista Cubana de Cirugía , 2000,
Abstract: Se realizó una revisión, análisis y estudio a 126 mujeres con linfedema posmastectomía, durante 7 a os. El tratamiento consistió en recomendaciones para las mastectomizadas, un equipo para facilitar el drenaje linfático y un plan de ejercicios. Del total de las pacientes, 25 fallecieron durante el estudio y 35 lo abandonaron. Las 66 pacientes restantes en su totalidad fueron atendidas y tratadas en consulta externa. El control del volumen de sus brazos se efectuaba mediante volumetrías con un equipo dise ado al efecto. De ahí que se clasificaba a la paciente de acuerdo con el volumen. De ellas, 12 se encontraban en la etapa I (edema leve), 19 en la etapa II (edema moderado) y 35 en la etapa III (edema severo). Con el nombre de método RED se lleva a cabo la investigación y el tratamiento. Según los resultados obtenidos, el 42,8 % de las pacientes de la etapa III pasó a la etapa II, el 52,6 % de la etapa II pasó a la etapa I y el 66,6 % de la etapa I quedó prácticamente sin edema alguno. De manera que el 50 % del total de los casos obtuvo una rotunda mejoría A review, analysis and study of 126 women with postmastectomy lymphedema was conducted during 7 years, the treatment consisted in recommendations for those whe had undergone mastectomy, a device to facilitate the lymphatic drainage and exercise therapy. Of the total of patients, 25 died during the study and 35 gave it up. The other 66 received attention and treatment at the outpatient department. The control of the volume of their arms was carried out by volumetries with a device designed to this end. Patients were classified according to the volume. 12 of them were in the first stage (mild edema), 19 in the second stage (moderate edema) and 35 in the third stage (severe edema). RED method was the name used to carry out this research and treatment. According to the results, 42.8 % of the patients who were in the third stage passed to the second stage, 52.6 % that were in the second stage passed to the first stage, and 66. 6 % of the first stage had practically no edema. 50 % improved completely
El marqués de Cervera y el derecho de los cubanos fieles a ser ciudadanos espa oles después del 98
Díaz Hernández, Magdalena
Anuario de Estudios Americanos , 2008,
Abstract: After the Paris Treaty in 1898, Spain refused Cubans who had supported it in the Independence War of the last Spanish colonies, their wish and right of keep on being Spanish citizens. As a consequence, they also lost their wages. That was the reason why the marques of Cervera defended them, writing a Manifiesto to the regent Queen and the Spanish Court in 1901, in which he proclaims the historical and cultural identity that Spain and Cuba had shared, like the best lure to make possible the recovery of their rights as older Spanish citizens, still living in Cuba. Tras la firma del Tratado de París de 1898, Espa a negó con fórmulas jurídicas el deseo y el derecho de los nacidos en Cuba que la habían apoyado durante la guerra de Independencia de las últimas colonias, a seguir siendo ciudadanos espa oles y, por lo tanto, a percibir sus sueldos ganados al servicio de Espa a. Por este motivo, el marqués de Cervera se erigió en defensor de éstos, escribiendo un Manifiesto que remitió a la reina regente y a las Cortes en 1901, en el que proclama la identidad histórica y cultural compartida entre Espa a y Cuba, para hacer posible la recuperación de sus derechos como antiguos ciudadanos espa oles, que siguieron residiendo en la isla de Cuba.
Una visión sucinta de la ense?anza de la medicina a lo largo de la historia: I. Desde el Antiguo Imperio Egipcio hasta el siglo XVII
Díaz Hernández,Diana Patricia;
Iatreia , 2011,
Abstract: in order to understand how medicine has been taught through the years, it is necessary to refer to historians who have approached the evolution of medicine. taking them as a starting point, it is possible to describe the attitudes of doctors in their role as professors, and the ways in which students acquired knowledge at different moments throughout centuries. this article presents a succinct vision of the advances and retrogressions in medical teaching at different historical moments. it starts with the ancient egyptian empire (3000-2500 b. c.) with its big legacy written on papyruses; continues with the enormous progress of greek medicine and the obscurity of the middle ages, and finishes with the advances until the xvii century.
Una visión sucinta de la ense?anza de la medicina a través de la historia: II. Colombia, un sitio donde confluyeron varias culturas con su arte de curar
Díaz Hernández,Diana Patricia;
Iatreia , 2011,
Abstract: in order to understand how medicine has been taught through the years, it is necessary to refer to historians who have approached the evolution of medicine. taking them as a starting point, it is possible to describe the attitudes of doctors in their role as professors, and the ways in which students acquired knowledge at different moments throughout centuries. this article presents a succinct vision of the evolution of medical teaching in colombia, starting with the arrival of the spanish conquerors. several ways of practicing and teaching medicine, the spanish and the aboriginals, coexisted. the evolution of medical teaching in colombian universities is succinctly described, as well as the current curricular proposal at the faculty of
A Escola Rural em Espanha na primeira fase do franquismo (1939-1951)
Díaz,José Maria Hernández;
Revista Lusófona de Educa??o , 2008,
Abstract: alter the spanish civil war final (19361939) we see in spain a harsh repression against all republican and socialist educative professional training practices and personal behaviours.at the same time, because of the loneliness in front of external countries, the inside economical survival and ideological building of the new fascist state, spain become a rural country. the rural school will fill a central and leading position inside the new educational pattern franco regime. it will be the heart for the new spanish fascist and catholic primary education.
Análisis de los factores de riesgo en el linfedema posmastectomía
Díaz Hernández,Orestes L.;
Revista Cubana de Higiene y Epidemiolog?-a , 2000,
Abstract: risk factors of the post-mastectomy lymphedema were studied and analyzed in the outpatient department of angiology and vascular surgery where 120 patients mastectomized from breast cancer, 95 of them with post-mastectomy lymphedema, and 25 cosdntrols were studied. the variables to be analyzed were divided into 2 groups: one with primary risk factors such as tumor stage, radiotherapy, type of mastectomy, surgical complications and the condition of pathological ganglia and the other with secondary risk factors like lymphangitis, spleen fibrosis, bracchial plexitis, arterial, venous and lymphatic flow and scar retraction. of the primary risk factors, the axillary dissection reached a relative risk of 1.32 with a p < 0,05 and the rest pf tjese factprs were not considered important risks for edema formation. all the secondary risk factors had a relative risk over 3 with p < 0,05 for all the analyzed factors. the axillary dissection associated with radiotherapy may contribute to the formation of an edema due to the chronic lymphatic occlusion that occurs. additionally, if there is an axillary vein thrombosis or an acute lymphagitis in the arm, a scar retraction takes place in the axilla, the arm becomes fibrotic, and the affected bracchial plexus hinders the movements of the upper limb, the the lymphedema may take a grotesque dimension. careful axillary dissection to avoid affecting nerves and vessels and radiotherapy with adequate dosage may reduce the possibilities of lymphatic edema. we strongly recommend the strict control of the risk factors that have been analyzed and studied in this paper.
Cuán rentable es la educación superior en Colombia?
Gustavo Adolfo Hernández Díaz
Lecturas de Economía , 2010,
Abstract: This paper examines the education premium for graduate students in Colombia, focusing on the screening hypothesis which is tested via sheepskin effects. A new dataset for higher education is constructed using administrative records of educational institutions and social security information. The findings suggest that the Colombian labor market places a high value on an individual’s alma mater, followed in, second place, by undergraduate field of study. Finally, the evidence also implies that job experience acquired after obtaining a degree has a higher return than job experience obtained before or not related to the degree’s field of study.
Factores de riesgo en la infección protésica vascular
Orestes L. Díaz Hernández
Revista Cubana de Higiene y Epidemiología , 2000,
Abstract: Se realizó un estudio para identificar los factores de riesgo de las prótesis vasculares infectadas. Se llevó a cabo un análisis bioestadístico con la utilización del proceso de regresión logística, la prueba de chi-cuadrado y los cálculos para el riesgo relativo. Se logró identificar como factores de riesgo la trombectomía femoral posoperatoria por oclusión inmediata, la diabetes mellitus, la arteriografía por el método de Seldinger y la anastomosis femoral en la región inguinal. Estas variables se consideraron como independientes para la infección de las prótesis vasculares. En el análisis multivariado los 4 factores de riesgo detectados mostraron un riesgo relativo mayor que 1 con valores significativos (p < 0,05). En el análisis univariado se mantuvo la misma estructura de los factores de riesgo detectados y se comprobaron los mismos resultados estadísticos. Los resultados del estudio fueron los siguientes: prótesis infectadas 12/318 (3,8 %), anastomosis femorales 281/318 (88 %), diabéticos 12/318 (4 %), arteriografía femoral 39/318 (12 %), trombectomía femoral 23/318 (7 %), fístulas aorto-entéricas 2/318 (0,6 %), amputados por sepsis 1/318 (0,3 %) y mortalidad precoz por sepsis protésica 4/318 (1 %). Se coincidió con la literatura médica mundial consultada en cuanto al uso profiláctico de la antibioticoterapia. Se dan a conocer las principales medidas a tener en cuenta como profilaxis de la infección de una prótesis vascular. We conducted a study for identifying the risk factors for vasular prosthetic infections. We carried out a biostatistical analysis using logistic regression, Chi-square test, and relative risk estimations. Risk factors found were post-operative femoral thrombectomy occlusion, diabetes mellitus, arteriography by Seldinger method, and femoral anastomosis in the inguinal region. They were considered independent variables for infections in vascular protheses. In a multivariate analysis, the 4 risk fcators showed a relative risk over 1 with significant values (p 0,05). In a univariate, detected risk factors kept the same structure and the same statistical results were found. The outcome of the study was as follows: infested protheses, 12 of 318 protheses (3.8 %), femoral anastomosis, 281 of 318 (88 %); diabetes, 12 of 318 (4 %); femoral arteriography, 39 of 318 (12 %); femoral thrombectomy, 23 of 318 (7 %); aortic enteric fistulae, 2 of 318 (0.6 %); amputations due to sepsis, (0.3 %) and early mortality from prosthetic sepsis, 4 (1 %). We agreed with the world literature as to the prophylactic use of antimicrobial agents. We set for
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