oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 12 )

2018 ( 26 )

2017 ( 38 )

2016 ( 58 )

Custom range...

Search Results: 1 - 10 of 18765 matches for " Alberto Espino "
All listed articles are free for downloading (OA Articles)
Page 1 /18765
Display every page Item
Advantages of Using a Spell Checker in Text Mining Pre-Processes  [PDF]
Jhonathan Quillo-Espino, Rosa María Romero-González, Alberto Lara-Guevara
Journal of Computer and Communications (JCC) , 2018, DOI: 10.4236/jcc.2018.611004
Abstract: The aim of this work was the behavior analysis when a spell checker was integrated as an extra pre-process during the first stage of the test mining. Different models were analyzed, choosing the most complete one considering the pre-processes as the initial part of the text mining process. Algorithms for the Spanish language were developed and adapted, as well as for the methodology testing through the analysis of 2363 words. A capable notation for removing special and unwanted characters was created. Execution times of each algorithm were analyzed to test the efficiency of the text mining pre-process with and without orthographic revision. The total time was shorter with the spell-checker than without it. The key difference of this work among the existing related studies is the first time that the spell checker is used in the text mining preprocesses.
Presentación
Herreras Espino, Alberto,Rui- Wamba Manija, Javier
Informes de la Construccion , 1981,
Abstract:
Variabilidad espacial en la estructura de la ictiofauna asociada a praderas de Cymodocea nodosa en las Islas Canarias, Atlántico nororiental subtropical
Espino,Fernando; Tuya,Fernando; Brito,Alberto; Haroun,Ricardo;
Revista de biología marina y oceanografía , 2011, DOI: 10.4067/S0718-19572011000300009
Abstract: a description of the patterns in spatial variability of fish assemblages is particularly relevant to guarantee an adequate management of these marine resources. thirty six trawls were considered on six seagrass meadows (10 km apart) in three islands (100 km apart) of the canary islands to (i) analyze the spatial variability in the structure (richness, abundance and diversity) of fish assemblages associated with cymodocea nodosa seagrass meadows, and to (ii) assess how the structural complexity of this habitat affects fish assemblage structure. a total of 3,616 fishes were captured, belonging to 30 species and 15 families. the total length of ca. 95% of individuals was < 10 cm, and ca. 90% of individuals were juveniles. spatial variability in fish assemblage structure was larger when considering the scale of meadows than the scale of islands (27.28% vs. 6.64% respectively, in the amount of explained total variability); the smallest spatial scale (i.e., the variability among replicated trawls within each seagrass meadow) accumulated the largest amount of variability (66.07%). differences in fish assemblage structure were largely driven by changes in the abundance of a few species, including diplodus annularis, spondyliosoma cantharus, mullus surmuletus and symphodus trutta. these species recruited into seagrass meadows, and confirmed the nursery role of this habitat in the canarian coastal waters. mean shoot density and variation of the seagrass canopy height were the descriptors that accounted for the most variability when explaining patterns in fish assemblage structure.
Encuesta nacional online aplicada en pacientes con enfermedad celíaca en Chile A national online survey applied to patients with celiac disease in Chile
Alberto Espino,Cecilia Castillo L,Ernesto Guiraldes,Helga Santibá?ez
Revista médica de Chile , 2011,
Abstract: Background: Celiac disease (CD) is an immune-mediated enteropathy triggered by the ingestion of gluten in genetically susceptible individuals. Its prevalence in Europe and the USA is 0.5 to 1%. Aim: To analyze epidemiological aspects and degree of compliance with gluten-free diet (GFD) among Chilean individuals with CD. Material and Methods: Subjects with confirmed or suspected CD were invited to answer an online survey published on the web at www.fundacionconvivir.cl. The answers were reinforced with a telephone interview. Results: The survey was answered by 1212 subjects (79% females). Median age at diagnosis was 25.8 years (range 1 to 84 years), with a bimodal curve with two peaks at less than 3 years and at 20 to 40 years of age. The diagnosis was made only by serologic markers in 9%, only by intestinal biopsy in 17.5%, and by a combination of both methods in 70%o. Conditions associated with CD were reported by 30%> of subjects and 20%> had relatives with CD. The GFD was strictly adhered to by 70%>, occasionally by 27%> and never by 3%>. Seventy five percent of subjects with a strict adherence to GFD had a favorable clinical response compared with 42%> of those with incomplete or lack of adherence (odds ratio 4.0, 95%> confidence intervals 2.8-5.7p < 0.01). Conclusions: In 30% of respondents, the diagnosis of CD was not confirmed according to international guidelines that require serology and duodenal biopsy. One third of subjects recognized a poor compliance with GFD. Those with a strict adherence to it had a more favorable clinical course. However, 25%> did not experience a clinical improvement despite a strict GFD, a finding which requires further study.
Infección por Helicobacter pylori en pacientes sintomáticos con patología gastroduodenal benigna: Análisis de 5.664 pacientes Helicobacter pylori infection in symptomatic patients with benign gastroduodenal diseases: Analysis of 5.664 cases
JUAN PABLO ORTEGA,ALBERTO ESPINO,ALFONSO CALVO B,PATRICIA VERDUGO
Revista médica de Chile , 2010,
Abstract: Infection with Helicobacter pylori (H. pylori) is highly prevalent in Chile, but there are no systematic studies in patients with upper gastrointestinal symptoms. Aim: To determine the prevalence of H. pylori infection, according to age, gender and endoscopic pathology in a large sample of patients. Methods: We studied 7,893 symptomatic patients submitted to upper gastrointestinal endoscopy between July 1996 and December 2003 in the context of a screening program of gastric cancer in a high risk population. H. pylori infection was determined by rapid urease test (RUT) in antral mucosa. We excluded 158 patients with gastric cancer (2%) and 2,071 patients without RUT. Results: We included 5,664 patients, mean age 50.7 ± 13.9 years, women 72.1%. Endoscopic diagnoses were normal in 59.3%, erosive esophagitis in 20%, gastric ulcer (GU) in 8.1%, duodenal ulcer (DU) in 6.4%, and erosive gastropathy in 6.2%. RUT was positive in 78% of patients. After adjusting for age and sex and with respect to patients with normal endoscopy, frequency of H. pylori infection was 86.6% in DU (OR 2.1, 95% CI 1.5-2.8, p < 0.001); 81.4% in GU (OR 1.8, 95% CI 1.4-2.4; p < 0.001 ); 79.9% in erosive gastropathy (OR 1.4, 95% CI 1.03-1.8; p = 0.03) and 77.4% in erosive esophagitis (OR 1.1, 95% CI: 0.9-1.3; p = NS). The probability of H. pylori infection decreased significantly with age, more markedly in men with normal endoscopy. Conclusions: Prevalence of H. pylori infection is very high in symptomatic Chilean patients and even higher in those with gastroduodenal ulcer or erosions, while in patients with erosive esophagitis is similar to those with normal endoscopy. The frequency of infection decreases with age, probably as a consequence of rising frequency of gastric mucosal atrophy.
Esofagitis Eosinofílica: Una entidad emergente
Beltrán M,Constanza; García M,Raimundo; Espino E,Alberto; Silva A,Claudia;
Revista de otorrinolaringología y cirugía de cabeza y cuello , 2009, DOI: 10.4067/S0718-48162009000300013
Abstract: eosinophilic esophagitis (ee) is a primary disease of the esophagus, previously mistaken with gastroesophageal reflux disease (gerd). its knowledge has developed over the last decade. ee is defined as the presence ofesophageal dysfunction symptoms (mostly dysphagia and food impaction) associated to at least 1 esophageal biopsy with 15 or more eosinophils in 1 high-power field and absence of gerd. its prevalence is rising, affecting principally white boys and young males with previous history of atopy. ee would be caused by an allergic reaction to certain food and aeroallergens mediated by citoquines with genetic changes involved. clinical presentation varies with age being dysphagia the most common symptom in all age goups. the diagnosis is clinical, endoscopic and histopathologic. it requires an endoscopy to evaluate mucosal findings and to take the biopsies. treatment includes elimination diets and topical steroids. the purpose of this review is to analyze the current state of the definition, history, epidemiology, fisiopathology and the diagnosis of ee, with an emphasis on improving its suspicion index and initial management.
Agenesia de pericardio izquierdo: A propósito de 1 caso
Rondón Espino,Jesús Alberto; García Hernández,Ileana;
Revista Cubana de Cirug?-a , 2001,
Abstract: the case of a patient with a clinical and radiological diagnosis of bronchopulmonary cancer that was operated on is presented. only a rare abnormality of development was found: agenesia of the left pericardium. a review of the medical literature on this affection is made
Encuesta nacional online aplicada en pacientes con enfermedad celíaca en Chile
Espino,Alberto; Castillo L,Cecilia; Guiraldes,Ernesto; Santibá?ez,Helga; Miquel,Juan Francisco;
Revista médica de Chile , 2011, DOI: 10.4067/S0034-98872011000700003
Abstract: background: celiac disease (cd) is an immune-mediated enteropathy triggered by the ingestion of gluten in genetically susceptible individuals. its prevalence in europe and the usa is 0.5 to 1%. aim: to analyze epidemiological aspects and degree of compliance with gluten-free diet (gfd) among chilean individuals with cd. material and methods: subjects with confirmed or suspected cd were invited to answer an online survey published on the web at www.fundacionconvivir.cl. the answers were reinforced with a telephone interview. results: the survey was answered by 1212 subjects (79% females). median age at diagnosis was 25.8 years (range 1 to 84 years), with a bimodal curve with two peaks at less than 3 years and at 20 to 40 years of age. the diagnosis was made only by serologic markers in 9%, only by intestinal biopsy in 17.5%, and by a combination of both methods in 70%o. conditions associated with cd were reported by 30%> of subjects and 20%> had relatives with cd. the gfd was strictly adhered to by 70%>, occasionally by 27%> and never by 3%>. seventy five percent of subjects with a strict adherence to gfd had a favorable clinical response compared with 42%> of those with incomplete or lack of adherence (odds ratio 4.0, 95%> confidence intervals 2.8-5.7p < 0.01). conclusions: in 30% of respondents, the diagnosis of cd was not confirmed according to international guidelines that require serology and duodenal biopsy. one third of subjects recognized a poor compliance with gfd. those with a strict adherence to it had a more favorable clinical course. however, 25%> did not experience a clinical improvement despite a strict gfd, a finding which requires further study.
Agenesia de pericardio izquierdo: A propósito de 1 caso
Jesús Alberto Rondón Espino,Ileana García Hernández
Revista Cubana de Cirugía , 2001,
Abstract: Se presenta el caso de un paciente que, diagnosticado clínica y radiológicamente como un cáncer broncopulmonar, se interviene quirúrgicamente y se encuentra sólo una rara anomalía del desarrollo: agenesia de pericardio izquierdo. Se realiza revisión de la literatura médica sobre esta afección The case of a patient with a clinical and radiological diagnosis of bronchopulmonary cancer that was operated on is presented. Only a rare abnormality of development was found: agenesia of the left pericardium. A review of the medical literature on this affection is made
Esofagitis Eosinofílica: Una entidad emergente Eosinophilic Esophagitis: an emerging entity
Constanza Beltrán M,Raimundo García M,Alberto Espino E,Claudia Silva A
Revista de Otorrinolaringología y Cirugía de Cabeza y Cuello , 2009,
Abstract: La esofagitis eosinofílica (EE) es una enfermedad primaria del esófago, previamente confundida con el reflujo gastroesofágico (RGE), cuyo conocimiento se ha desarrollado principalmente en la última década. Se define como la presencia de síntomas de disfunción esofágica (principalmente disfagia e impactación alimentaria), asociados a por lo menos una biopsia esofágica con más de 15 eosinófilos por campo de mayor aumento (CMA), y la exclusión de RGE. Su prevalencia va en aumento y afecta principalmente a ni os y hombres jóvenes de raza blanca con historia previa de atopía. La EE sería causada por una reacción alérgica a ciertos alimentos y/o aeroalérgenos mediada por citoquinas y con cambios genéticos involucrados. La presentación clínica varía con la edad siendo la disfagia el síntoma más frecuente en todos los grupos etarios. El diagnóstico es clínico, endoscópico y anatomopatológico. Se requiere de una endoscopía digestiva alta (EDA) para evaluar hallazgos característicos y tomar biopsias para el estudio histológico. Los tratamientos actuales incluyen medidas dietéticas basadas en la eliminación de la exposición de alérgenos alimentarios y uso de corticoesteroides tópicos. El objetivo de esta revisión es analizar el estado actual de la definición de EE, historia, epidemiología, fisiopatología, diagnóstico y principalmente ayudara mejorar su sospecha diagnóstica y manejo. Eosinophilic esophagitis (EE) is a primary disease of the esophagus, previously mistaken with gastroesophageal reflux disease (GERD). Its knowledge has developed over the last decade. EE is defined as the presence ofesophageal dysfunction symptoms (mostly dysphagia and food impaction) associated to at least 1 esophageal biopsy with 15 or more eosinophils in 1 high-power field and absence of GERD. Its prevalence is rising, affecting principally white boys and young males with previous history of atopy. EE would be caused by an allergic reaction to certain food and aeroallergens mediated by citoquines with genetic changes involved. Clinical presentation varies with age being dysphagia the most common symptom in all age goups. The diagnosis is clinical, endoscopic and histopathologic. It requires an endoscopy to evaluate mucosal findings and to take the biopsies. Treatment includes elimination diets and topical steroids. The purpose of this review is to analyze the current state of the definition, history, epidemiology, fisiopathology and the diagnosis of EE, with an emphasis on improving its suspicion index and initial management.
Page 1 /18765
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.