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Search Results: 1 - 10 of 200757 matches for " Ignacio Moreno G. "
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Grado de competencia, presión de la deuda y productividad empresarial: un análisis empírico desde la perspectiva del gobierno corporativo
Juan A. Maroto A.,Mónica Melle H.,Ignacio Moreno G.,José M. Rodríguez F.
Panorama Socioeconómico , 2006,
Abstract: Este trabajo ofrece evidencia emp rica acerca del impacto sobre la productividad empresarial derivado del grado de competencia, el poder de mercado, la presi n financiera del endeudamiento y la estructura de la propiedad de la empresa. En el an lisis, se estiman varios modelos din micos de regresi n mediante el m todo generalizado de momentos propuesto por Arellano y Bond (1991), a partir de una muestra de datos de panel constituida por 4.947 empresas manufactureras espa olas pertenecientes a 19 sectores industriales diferentes, durante un periodo que abarca del a o 1994 al a o 2003. Vistos en su conjunto, los resultados alcanzados sugieren que la competencia, junto con la presi n financiera y el tipo de accionista de control en cada empresa, influyen sobre la productividad empresarial, detect ndose alguna evidencia de que pueden actuar a veces como mecanismos complementarios de los c digos de buen gobierno corporativo y de los habituales sistemas de disciplina aplicados por los mercados financieros.
Anestesia, analgesia y sedación en los procedimientos endoscópicos
Ignacio Ruiz Moreno
Revista Colombiana de Gastroenterologia , 2004,
Abstract:
Circunferencia de cintura: una medición importante y útil del riesgo cardiometabólico
Manuel Ignacio Moreno González
Revista Chilena de Cardiología , 2010,
Abstract:
Performance of the digene LQ, RH and PS HPVs genotyping systems on clinical samples and comparison with HC2 and PCR-based Linear Array
Jose M Godínez, Sara Tous, Nuria Baixeras, Judith Moreno-Crespi, María Alejo, Marylène Lejeune, Ignacio G Bravo, F Xavier Bosch, Silvia de Sanjosé
Infectious Agents and Cancer , 2011, DOI: 10.1186/1750-9378-6-23
Abstract: The concordances and kappa statistics (k) for each technique compared with HC2 were 98.69% (k = 0.94) for LQ, 98.03% (k = 0.91) for RH and 91.80% (k = 0.82) for PS. There was a very good agreement in HPVs type-specific concordance for the most prevalent types HPV16 (kappa range = 0.83-0.90), HPV18 (k.r.= 0.74-0.80) and HPV45 (k.r.= 0.82-0.90).The three tests showed an overall good concordance for HPVs detection when compared with HR-HC2 system. LQ and RH rendered lower detection rate for multiple infections than LA genotyping. However, our understanding of the clinical significance of multiple HPVs infections is still incomplete and therefore the relevance of the lower ability to detect multiple infections needs to be evaluated.Human Papillomaviruses (HPVs) are among the most common viruses identified in sexually active women all around the world, and persistence of the HPVs infection is a necessary step for the development of cervical cancer [1]. Cervical cancer is the second most common cancer in women, with a yearly incidence of 15.8 per 100,000 (crude rate), causing more than 270,000 deaths in 2008 [2]. Other diseases with clinical relevance are also related to HPVs infection, such as genital warts or intraepithelial lesions and cancer of the vulva, penis, vagina and anus [3-5].More than 150 different PVs infecting humans have been described [6]. Initially, and on the basis of epidemiological studies of prevalence in cervical lesions, HPVs with genital tropism were classified either as Low Risk (LR-HPVs) or High Risk (HR-HPVs) [7]. Oncogenic types such as HPV16, 18, 31 and 45 are responsible for the vast majority of all cervical cancers worldwide [8], and are also present in other genital lesions (penile or vulvar carcinomas). On the other hand, LR-HPVs, such as HPV6 or HPV11, are usually described as non-oncogenic and are associated to benign lesions such as genital warts, condylomas or low grade genital carcinomas [9].Because of the clinical and economical rel
Tratamiento hidroelectrolítico y ácido base en pacientes con cetoacidosis diabética: comparación de dos guías terapéuticas
Gómez Rivera, Norberto;Montes Aguilar, José Ricardo;Molina Moreno, Francisco Antonio;García Zárate, María Guadalupe;Villalobos García, Luis;Castillo Ramos, Jaime;Fonseca, Ignacio;
Boletín médico del Hospital Infantil de México , 2004,
Abstract: introduction. the aim of this work was to compare 2 different therapeutic guidelines which recommend diverse amounts of fluids, and bicarbonate to correct dehydration and acid-base unbalance in children with diabetic ketoacidosis (dka). material and methods. a group (a) of patients (n= 16) with dka treated with a guideline which recommend the reposition of basal plus negligible fluid loss without bicarbonate were compared with a second group (n =16) of dka patients (group b) managed with another guideline which do not consider negligible fluid loss but recommend the use of bicarbonate. patients with severe dehydratation, hyperglycemia > 300 mg/dl, ph > 7.3 or bicarbonate < 15 mmol/l, ketonemia, glycosuria, and ketonuria, were included. a bivariate test for each dependent variable, z distribution, and student's t test were used in the statistical analysis. results. correction of dehydration in a 24 h period was achieved in 81.2% of patients in group a and in 37.5% of group b (p =0.0005). average fluid volume was 5 287 ± 1 659 ml in group b, and 8 360 ± 7 391 ml in group a. glycemia was 292 ± 45 mg in group a, and 310 ± 76.4 mg in group b; ph was 7.32 ± 0.064 in group a, and 7.2 ± 0.146 in group b (p =0.005). after 24 h anion gap was 12.7 ± 1.57 in group a, and 29 ± 11.44 in group b (p =0.0001), serum na was 133.9 ± 2.56 meq/l in group a, and 147.8 ± 12.47 meq/l in group b (p =0.001); serum k was 4.85 ± 1.15 meq/l in group a, and 4.2 ± 0.52 meq/l in group b (p =0.05). osmolarity was 296 ± 6.75 mosmol/l in group a, and 276 ± 8.08 in group b (p =0.0003). conclusions. stabilization after 24 h, rehydration, electrolyte and acid-base balance were more effectively achieved with the reposition of basal plus negligible losses of fluids without bicarbonate.
COMPARACIóN DE ESTRATEGIAS TERAPéUTICAS PARA EL CONTROL DE LA TENSIóN ARTERIAL Y LA ANGINA DE PECHO EN PACIENTES CON HIPERTENSIóN ARTERIAL Y CARDIOPATíA ISQUéMICA CRóNICA EN LA PROVINCIA DE VILLA CLARA. APéNDICE DEL ESTUDIO INVEST / Comparison of therapeutic strategies for the control of blood pressure and angina in patients with hypertension and chronic ischemic heart disease in the province of Villa Clara. Appendix of INVEST study
José Raúl Nodarse Valdivia,Arnaldo Rodríguez León,Francisco Luis Moreno-Martínez,José Ignacio Ramírez Gómez
CorSalud , 2011,
Abstract: Background and Objectives: The treatment of hypertension and its complications are a worldwide problem. In our country nearly 25 % of the population over 15 years old is hypertensive, and this figure nearly doubles in those over 60. This research aims to compare two treatment strategies for controlling hypertension in outpatients with chronic coronary ischemic syndrome. Method: A total of 150 patients was included, 73 were randomized to receive calcium antagonist and non-calcium antagonist respectively, as 4 patients were subsequently excluded. Each was asked to sign consent, underwent clinical examination and a 12-lead, conventional electrocardiogram. Blood pressure and episodes of angina were evaluated at 6 months and one year. All variables were entered into a database and statistical analysis was performed using Student's t and Chi square. Results: The mean age was 61,5 years. Women and white skin color were predominant. At 12 months of treatment, blood pressure normalized in more than 80 % of patients without significant differences between the two treatment strategies. Over 75 % of patients in both groups controlled the angina episodes and more than 85 % said the quality of life was good. Conclusions: Control of blood pressure and angina was achieved and there were no significant differences between the two treatment strategies.
Tumor de células de sertoli, un extra?o tumor testicular: Nuestra experiencia y revision de la literatura
Gómez García,Ignacio; Romero Molina,Marta; López-García Moreno,Antonio; Buendía González,Elena; Rubio Hidalgo,Emilio; Bolufer,Eduardo; Sampietro Crespo,Antonio; Gómez Rodríguez,Antonio;
Archivos Espa?oles de Urología (Ed. impresa) , 2010, DOI: 10.4321/S0004-06142010000500013
Abstract: objective: we report two new cases of sertoli cell testicular tumors, and a cochrane and medline search of cases published worldwide. methods: we reviewed our series of testicular tumors, the stromal tumor incidence, clinical presentation, treatment and prognosis, and the experience reflected in the literature. results: the prevalence of testicular tumors in our health area is of 0.09%, and 2.3% of them are sertoli cell neoplasms. this figure is slightly higher than the found in other series in which sertoli tumors range from 0.4% to 1.5% of testicular malignancies in adults and reach 4% in children. conclusions: sertoli cell tumor has an incidence not exceeding 4%. the most common symptom is a painless mass; in cases with endocrine manifestation, up to 10% are malignant depending on the age of the patient.
The geometry of the space of Cauchy data of nonlinear PDEs
G. Moreno
Mathematics , 2012,
Abstract: First-order jet bundles can be put at the foundations of the modern geometric approach to nonlinear PDEs, since higher-order jet bundles can be seen as constrained iterated jet bundles. The definition of first-order jet bundles can be given in many equivalent ways - for instance, by means of Grassmann bundles. In this paper we generalize it by means of flag bundles, and develop the corresponding theory for higher-oder and infinite-order jet bundles. We show that this is a natural geometric framework for the space of Cauchy data for nonlinear PDEs. As an example, we derive a general notion of transversality conditions in the Calculus of Variations.
The Bianchi variety
G. Moreno
Mathematics , 2010,
Abstract: The totality Lie(V) of all Lie algebra structures on a vector space V over a field F is an algebraic variety over F on which the group GL(V) acts naturally. We give an explicit description of Lie(V) for dim V=3 which is based on the notion of compatibility of Lie algebra structures.
Minimising Mortality in Endangered Raptors Due to Power Lines: The Importance of Spatial Aggregation to Optimize the Application of Mitigation Measures
Francisco Guil, Mariana Fernández-Olalla, Rubén Moreno-Opo, Ignacio Mosqueda, María Elena Gómez, Antonio Aranda, ángel Arredondo, José Guzmán, Javier Oria, Luis Mariano González, Antoni Margalida
PLOS ONE , 2011, DOI: 10.1371/journal.pone.0028212
Abstract: Electrocution by power lines is one of the main causes of non-natural mortality in birds of prey. In an area in central Spain, we surveyed 6304 pylons from 333 power lines to determine electrocution rates, environmental and design factors that may influence electrocution and the efficacy of mitigation measures used to minimise electrocution cases. A total of 952 electrocuted raptors, representing 14 different species, were observed. Electrocuted raptors were concentrated in certain areas and the environmental factors associated with increased electrocution events were: greater numbers of prey animals; greater vegetation cover; and shorter distance to roads. The structural elements associated with electrocutions were shorter strings of insulators, one or more phases over the crossarm, cross-shaped design and pylon function. Of the 952 carcasses found, 148 were eagles, including golden eagle (Aquila chrysaetos), Spanish imperial eagle (Aquila adalberti) and Bonelli's eagle (Aquila fasciata). Electrocuted eagles were clustered in smaller areas than other electrocuted raptors. The factors associated with increased eagle electrocution events were: pylons function, shorter strings of insulators, higher slopes surrounding the pylon, and more numerous potential prey animals. Pylons with increased string of insulators had lower raptor electrocution rates than unimproved pylons, although this technique was unsuccessful for eagles. Pylons with cable insulation showed higher electrocution rates than unimproved pylons, both for raptors and eagles, despite this is the most widely used and recommended mitigation measure in several countries. To optimize the application of mitigation measures, our results recommend the substitution of pin-type insulators to suspended ones and elongating the strings of insulators.
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