A. Colmenares

Learn More
; Gelenbe has proposed a neural network, called a Random Neural Network, which calculates the probability of activation of the neurons in the network. In this paper, we propose to solve the patterns recognition problem using a hybrid Genetic/Random Neural Network learning algorithm. The hybrid algorithm trains the Random Neural Network by integrating a(More)
A total of 184 Costa Rican Allergic Rhinitis patients with at least one positive skin prick test in a previous study were tested for reaction to Poaceae tribes and species compared with 100 non atopic subjects. Skin prick tests were applied for the most abundant species present in Costa Rica. Highest positivity rates among the Allergic Rhinitis patients(More)
BACKGROUND/AIMS Prader-Willi syndrome (PWS) is a complex genetic disorder whose many manifestations include obesity and short stature. Diabetes, osteoporosis, and scoliosis are common. We evaluated the effects of human growth hormone (hGH). METHODS A prospective cohort study of 36 children (1-15 years of age) with genetically confirmed PWS who were given(More)
OBJECTIVE The prevalence of severe primary IGF1 deficiency (IGFD) is unclear. IGFD must be identified promptly as treatment with recombinant human IGF1 (rhIGF1) is now available. Our objective was to characterize and assess the prevalence of severe primary IGFD in a large cohort of patients evaluated for short stature at a pediatric endocrinology unit in(More)
In a sample of 190 Costa Rican allergic patients and 100 non atopic subjects there was a positive correlation of positivities in skin prick tests to individual Poaceae species and to the Tribe. The exceptions were Panicum maximun, Panicum molle, and Holcus lanatus, because they presented higher individual positivities. A table of correlations among tribes(More)
Type I Hypersensitivity to Poaceae pollen was tested in 27 Costa Rican patients with a clinical diagnosis of Atopic Dermatitis (six were males). Skin prick tests were done with 1/10 W/V, 50% glycerinated, pollen extracts, organized by tribes. Most patients had several allergic problems. Sensitivity increased with the number of allergic diagnoses. Positivity(More)
Allergy to pollen is a significant health problem in Costa Rica. This volume both reviews and presents new data on the subject, for which there are no similar comprehensive studies in other areas of Latin America. A description of the sampling methods is presented, as well as an introduction to work presented throughout the volume. A hundred control(More)
  • Juan Arizmendi, Vicente Carmona Pertuz, +4 authors E COMPLICAÇÕES NEONATAIS
  • 2013
Gestational diabetes is a frequent complaint in maternal-fetal medicine; cases are on the rise and therefore neonatal complications in children of mothers with gestational diabetes, which will be reviewed in order to clarify the cause and treatment update. The objective is to review the gestational diabetes as an entity and describe major neonatal(More)
A total of 260 Costa Rican patients (106 males) with clinical diagnosis of Bronchial Asthma and 100 non atopic subjects were studied with skin prick tests for all Poaceae tribes. Allergic Type I Hypersensitivity to these pollens among the Bronchial Asthma patients reached 51.2% positivity to at least one tribe (2% in controls). The positivity to each tribe(More)
Type I Hypersensitivity to pollens of the Poaceae Family (Gramineae) organized by subfamilies and tribes were studied in 404 Costa Rican patients with a clinical diagnosis of Allergic Rhinitis and 100 non atopic subjects. Skin prick tests (for each tribe) were done with pooled samples from the species which are most abundant in Costa Rica (1/10 W/V, 50%(More)