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匹配条件: “Luis Martínez Delgado” ,找到相关结果约63627条。
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Coeficiente de Oscilación de la Línea Sumaria de Contacto en los Engranajes Cilíndricos Helicoidales.
Elvis Mirabet Lemos,Luis Martínez Delgado
Revista de Ingeniería Mecánica , 2009,
Abstract: El trabajo muestra una forma gráfica, sencilla y precisa, para obtener el Coeficiente de Oscilación de la Línea Sumaria de Contacto en los Engranajes Cilíndricos Helicoidales, necesario para el cálculo a resistencia de estos engranajes. The work shows a graphic, simple and precise form, to obtain the coefficient of oscillation of the summary contact line in the helical cylindrical engagements, necessary for the resistance calculation of these engagements.
Equations for three dimensional motion of wind turbine planetary mechanisms Ecuaciones para el movimiento en tres dimensiones de mecanismos planetarios en turbinas eólicas
Jorge Wellesley-Bourke Funcasta,Luis Martínez Delgado
Revista Cubana de Ingeniería , 2010, DOI: 10.1234/rci.v1i1.10
Abstract: In this paper is presented the mathematical base useful to establish the analysis that deals with the noxious effect produced on the planetary mechanisms in the gearboxes for wind turbine generator systems, given by the variable conditions of the velocity and direction of the wind. En el trabajo se desarrolla el basamento matemático para establecer el análisis del efecto nocivo que se produce sobre los rodamientos de los mecanismos planetarios empleados en los aerogeneradores, dado esto por las condiciones variables del viento en cuanto a su velocidad y dirección.
Efficacy and safety of oral solution dosed misoprostol versus misoprostol vaginally in labour induction  [PDF]
Longinos Aceituno Velasco, María Teresa Sánchez Barroso, María Huertas Segura García, Valois González Acosta, Ramón de la Fuente Pedrosa, Ana Barqueros Ramírez, Luis Delgado Martínez, Encarna Ruiz Martínez
Open Journal of Obstetrics and Gynecology (OJOG) , 2013, DOI: 10.4236/ojog.2013.39123
Abstract:

Background: Labour induction is one of the most common medical procedures in obstetrics. The aim is to end the pregnancy when continuity is a risk to mother or fetus. Its main side effect is the increase in the cesarean rate, compared to spontaneous onset deliveries. On the other hand, mortality and morbidity in cesareans are higher. The most common pharmacological drugs used for induction are prostaglandins: dinoprostone and misoprostol. The “gold standard” for labour induction is vaginal misoprostol. The oral route is also effective and also has several benefits like faster onset and easear administration. In recent years several publications state that the administration of misoprostol oral solution, given in doses gradually, is associated with a lower cesarean and hyperstimulation rate than the cases where vaginal misoprostol has been used in pregnant women with unripe cervix. Furthermore, being its half life shorter, it may be very useful in case of uterine hyperstimulation and, probably, a high percentage of women prefer this oral administration to the vaginal one. The objective of this study is to compare the efficacy, safety and side effects on mother and fetus on use of oral versus vaginal administration for induction of labour for prolonged gestation (41 weeks) and premature rupture of membranes, both with live fetus. Methods/Design: Design: double blind controlled trial. Study population: Pregnant women whose labour will be induced due to premature rupture of membranes or prolonged gestation. Inclusion Criteria: 1) Bishop Test equal to or less than 7; 2) Single pregnancy; 3) Pregnancy at term (37 - 42 weeks); 4) No history of uterine surgery; 5) Cephalic presentation; 6) Live fetus; 7) No prostaglandins contraindications. Discussion: Nowadays induction rates are very high, ranging from 25% to 30% approximately. In these cases caesarean rates are higher than when the delivery starts spontaneously. That is one of the main reasons why caesareans have increased, mainly in the cases of nuliparous women with immature cervix. If we can prove the hypothetical good results obtained through the use of dosed oral misoprotol, we will be able to reduce the number of induced deliveries by cesarean, and so improve the levels of security for the mother and the foetus, and, as a consequence, provide a higher quality of medical attention to the newborn and the mother.

Social and cognitive determinants in entrepreneurial interest: an exploratory study among argentine students
Ma ISABEL DELGADO PI?A,LUIS GóMEZ MARTíNEZ,ANA MARíA ROMERO MARTíNEZ,ELENA VáZQUEZ INCHAUSTI
Cuadernos de Gestión , 2008,
Abstract: In this paper we analyze the intentions in creating a business on the part of a group of Argentine students in Strategic Human Resources Management in the University of Buenos Aires. The results of the study show that these students want to create their own business, but their possibilities depend on several factors. Among all of them, self-effi cacy stands out; those students who show more self-effi cacy are those who demonstrate more intention for creating a business. This intention is minor for the students who possess more social support. Neither family charges nor previous experience in entrepreneurship have a signifi cant effect.
Policitemia vera en ni os: Reporte de 3 casos Polycythemia vera in children: Report of 3 cases
Norma Fernández Delgado,Teresa Fundora Sarraff,Roberto Silva Aguiar,Luis Martínez Cardet
Revista Cubana de Hematolog?-a, Inmunolog?-a y Hemoterapia , 2006,
Abstract: La policitemia vera (PV) es un trastorno de la célula progenitora hematopoyética donde la característica más prominente es el incremento de la masa absoluta de glóbulos rojos. Su incidencia en adultos es aproximadamente 2 x 100 000/a o y su presentación en ni os es extremadamente rara. En este trabajo presentamos 3 ni os de 4, 8 y 14 a os, respectivamente con diagnóstico de policitemia vera, uno de ellos con un síndrome de Budd Chiari como condición que llevó a la búsqueda de la enfermedad. Para el diagnóstico en todos los casos se respetaron los criterios clásicos establecidos por el grupo internacional de estudios de la PV hace más de 6 décadas y se realizó además el estudio de la médula ósea y la cuantificación de eritropoyetina sérica Polycythemia vera is a disorder of the hematopoietic progenitor cell, where the most prominent characteristic is the increase of the absolute mass of red blood cells. Its incidence in adults is approximately 2 x 100 000/year, and its appearance in childen is extremely rare. In this paper, we present 3 children of 4,8 and 14 years old, respectively, with diagnosis of polycythemia vera, one of them with Budd Chiari syndrome as the condition that led to the search of the disease. All the classical criteria established by the international group of studies of PV more than six decades ago were respected to make the diagnosis. A study of the bone marrow was conducted and the quantification of serum erythropoietin was performed
Importancia de los antioxidantes dietarios en la disminución del estrés oxidativo
Luis Delgado Olivares,Gabriel Betanzos Cabrera,Ma. Teresa Sumaya Martínez
Investigación y Ciencia de la Universidad Autónoma de Aguascalientes , 2010,
Abstract: Los radicales libres, producidos normalmente durante el metabolismo aerobio se utilizan en diversos procesos fisiológicos como un mecanismo de defensa contra agentes infecciosos. Sin embargo,estas moléculas son altamente reactivas, capaces de da ar a las diversas biomoléculas de nuestras células. Los radicales libres también pueden originarse a partir de contaminantes ambientalesy del consumo de ciertos alimentos, lo que incrementa su concentración en las células, ocasionando un fenómeno conocido como estrés oxidativo, el cual está asociado con diversas enfermedades crónico degenerativas, que afectan tanto la calidad como la esperanza de vida de los pacientes. Por lo cual, un cambio enla dieta que incorpore alimentos con capacidad antioxidante, puede utilizarse como terapia para prevenir el da o oxidativo.
Enfermedad de Behcet: Informe de 5 casos
Gerardo álvarez álvarez,Francisco Martínez Delgado,Modesto González Corti?as,C. Luis Martín García
Revista Cubana de Medicina , 1998,
Abstract: Se estudiaron 5 sujetos con enfermedad de Behcet según los criterios establecidos para detectarla. Se encontraron úlceras orales en todos; las lesiones en genitales, en 4; el eritema nudoso, en 3; la patergia, en 3; la artritis, en 2; la oclusión vascular, en 2; las lesiones papulopustulosas y piodérmicas, en 3; y lesiones acneiformes, en 1. No hubo lesión ocular de las se aladas como criterio en ninguno de los pacientes objeto de estudio, pero sí conjuntivitis angular bilateral crónica en uno. En otro enfermo se observó la asociación de esta entidad con la policondritis recidivante (síndrome MAGIC), el cual constituye el primer caso reportado en Cuba. 5 patients suffering from Behcet′s syndrome were studied according to the criteria established to detect it. Oral ulcers were observed in all of them, genitalia lesions, in 4; nodose erythema, in 3; pathergy, in 3; arthritis, in 2; vascular occlusion, in 2; papulopustular and pyodermal lesions, in 3; and acneiform lesions, in 1. There was no ocular lesion of those considered as criterion in any of the patients under study, but chronic bilateral angular conjunctivitis was found in one of them. It was observed the association of this disease with recidivist polychondritis (MAGIC syndrome) in another patient that is the first case reported in Cuba.
Enfermedad de Behcet: Informe de 5 casos
álvarez álvarez,Gerardo; Martínez Delgado,Francisco; González Corti?as,Modesto; Martín García,C. Luis; Martínez Fraga,Aurora;
Revista Cubana de Medicina , 1998,
Abstract: 5 patients suffering from behcet′s syndrome were studied according to the criteria established to detect it. oral ulcers were observed in all of them, genitalia lesions, in 4; nodose erythema, in 3; pathergy, in 3; arthritis, in 2; vascular occlusion, in 2; papulopustular and pyodermal lesions, in 3; and acneiform lesions, in 1. there was no ocular lesion of those considered as criterion in any of the patients under study, but chronic bilateral angular conjunctivitis was found in one of them. it was observed the association of this disease with recidivist polychondritis (magic syndrome) in another patient that is the first case reported in cuba.
How do entrepreneurial firms manage human resources? The REDUR case
M.a ISABEL DELGADO PI?A,LUIS GóMEZ MARTíNEZ,ANA MARíA ROMERO MARTíNEZ,ELENA VáZQUEZ INCHAUSTI
Cuadernos de Gestión , 2007,
Abstract: This paper analyzes the human resources management in a familiar and entrepreneurial company, REDUR. Specifically, it is analyzed the characteristics and the main problems of the human resources area along the company’s cycle of life. Nowadays, REDUR is in the growth stage. The work shows that the human resources management goes becoming more formal and that formation and selection are the most important practices. Exactly, in which refers to these practices, they use graphology, as technique to select personal, and they consider especially important the socialization. The reason can be that businesses in growth emphasize person-organization fit.
Lesiones penetrantes y transfixiantes en los traumatismos abiertos del tórax
Sosa Delgado,Diego; González López,José; Hernández Varea,José; Conde Castells,Luis; González Martínez,Pablo;
Revista Cubana de Medicina Militar , 2001,
Abstract: the severity and danger for life caused by the penetrating and transfixing chest injuries and the need of an immediate response with an early diagnosis and treatment, motivated us to go deep into the study of these traumas, to evaluate the timely application of the surgical treatment, to determine the causal injuring agents, the most affected organs and the complications. a retrospective study of 116 patients with open traumas of the chest that were attended at "dr. carlos j. finlay" military central hospital during 4 years was conducted. 80 patients had penetrating or transfixing injuries. age, sex, the injuring agents, the visceral injuries, the therapeutics and the complications were analyzed. it was proved that male patients were the most affected during the third decade of life. it was also observed a predominance of puncturing and cutting agents. the lung was the most injured intrathoracic organ. 97 % of the patients had pneumothorax, hemothorax or hemopneumothorax., associated with a collapse of the lung and severe respiratory compromise. thoracotomy was performed in 37 % of the patients and its indication was always considered as correct. the sepsis of the traumatic wound was the commonest complication.
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