Method for maximum power point tracking and verification by modeling a unified wind energy conversion system.

Maximum power point tracking in wind turbines is a topic that has attracted many researchers' interest; however, the studies presented are usually carried out only at the simulation level, so they lack a verification in the system through real measurements. On the other hand, the system's modeling is usually quite complex, making it challenging to meet the control objectives. There are unified models in which the system is treated in a generalized way according to various research purposes. This work presents a methodology that simplifies the unified system through a series of dynamic tests that applied to obtained a simplified model much easier to handle without sacrificing the system's dynamic richness. • An alternative approach for a unified wind energy conversion system is established by employing physical dynamic tests applied to the wind set. • A maximum power point tracking is verified by real-time measurements managed by an open-source platform. • Methodology related to electronic instrumentation and programming is described so the tests can be reproduced without much difficulty.

Clinical impact of obesity on respiratory diseases: A real-life study.

BACKGROUND: Obesity has become an epidemic that affects Mexico; significantly interferes with respiratory physiology by decreasing lung volumes, therefore, might be considered as a relevant risk factor associated with the development of respiratory diseases. OBJECTIVE: Our primary outcome was to analyze the frequency and risk factors between obesity and respiratory disease in the Mexican population. MATERIALS AND METHODS: An observational, single-center, descriptive study, which included the totality of patients who were referred for medical attention at the Respiratory and Thorax Surgery Unit at the Hospital Regional de Alta Especialidad de la Península de Yucatán during the period from January 2015 to December 2018. The cases were grouped based on the existence or not of respiratory disease and the presence or absence of obesity (body mass index [BMI] >30 kg/m2). RESULTS: A total of 1167 patients were included; about 39% of the population had average BMI 36.5 kg/m2. The primary respiratory diseases in obese patients were Obstructive Sleep Apnea Syndrome (OSAS, 19%) and asthma (15%). The logistic regression analysis showed a direct association between the presence of obesity with respiratory disease (odds ratio 1.58, 95% confidence interval 1.22-2.03, P < 0.001), the strength of this association was related with asthma and OSAS. CONCLUSION: The presence of obesity is an independent risk factor for respiratory disease, primarily for OSAS and asthma.

[Pancreatoblastoma in a pediatric patient: a case report]. / Pancreatoblastoma en paciente pediátrico: reporte de caso.

Pancreoblastoma is a very rare tumor that originates from the exocrine epithelial cells of the pancreas. However, it is the most frequent pancreatic tumor in children. It usually appears in the first decade of life with an average of 5 years old. The clinical manifestations are usually unspecific, being the abdominal pain and the abdominal mass the most frequent. The radiological signs are not very well described in medical literature. The definite diagnosis should always be established with biopsia and histological examination. Here it is presented a clinical case of pancreoblastoma with unusual involvement of a major duodenal papilla in a pediatric patient.

Physiological responses in horses, donkeys and mules sold at livestock markets.

The horse welfare at markets includes fatigue, fear, fasting, dehydration and injuries. However, the scientific literature contains no readily-available information on the physiology responses of equids sold in livestock markets. The objective of the present study was to evaluate the effect of holding in livestock markets on gas exchange, the acid-base balance, energy metabolism, and the mineral and water balance in 4 types of horses (Equus caballus), donkeys (Equus asinus) and mules ((Equus asinus × Equus caballus). To this end, a total of 1,438 equine were utilized, after classification into six groups, as follows: mules, donkeys, culled horses, charrería horses (Mexican rodeo horses), foals, and ponies. The time intervals evaluated were 1 and 5 h. During the study, the animals received only water ad libitum. The physiological blood indicators assessed were: PvCO2 (mm Hg) and PvO2 (mm Hg) pressure, pH, glucose (mg/dL), lactate (mg/dL), bicarbonate levels (mmol/L), hematocrit (%), Na+, K+ and Ca2+ (mmol/L). The animals that presented the most marked physiological alterations were the mules and donkeys. The mules that remained in the corrals for 1 h presented increases (P < 0.0001) in the values for pO2, glucose, hematocrit and blood pH, compared to reference values (RV), while the donkeys had increases (P < 0.0001) in glucose and hematocrit values. By the end of the first hour at the exhibition corrals the equine were dehydrated, suffered fatigue, and suffered metabolic and compensatory problems, probably due to the combined effects of a series of factors that include transport and inadequate handling.

Caracterización psicológica de los pacientes con suicidio consumado en La Habana en el año 2010 / Patients' psychological characterization with suicide consummated in Havana in the year 2010

Introducción: el suicidio se encuentra dentro de las diez primeras causas de defunción a escala mundial, por lo que plantea un problema sanitario de gran magnitud que requiere de todos los esfuerzos de las organizaciones de salud en diferentes latitudes, dirigidos a prevenir y controlar la conducta suicida. Objetivo: identificar las características de la personalidad de un grupo de suicida Métodos: se realizó un estudio cuantitativo retrospectivo. Se utilizó la versión del MAPI (Modelo de Autopsia Psicológica Integrado) validada para suicidas. El universo estuvo constituido por las personas fallecidas por suicidio en La Habana durante al año 2010, seleccionándose al menos dos familiares cercanos o personas que hubiesen conocido de manera íntima a cada occiso y que aportaran la información necesaria. Los datos de identidad de los fallecidos fueron tomados de los certificados de defunción registrados en el Departamento de Estadísticas de la Dirección Provincial de Salud de La Habana. Resultados: predominaron los sujetos masculinos (74,2 por ciento), los adultos mayores (39, 5 por ciento) de características, en al menos el 30 por ciento, como reservado, pero sociable, impulsivo, caprichoso y testarudo. Conclusiones: parte del perfil del suicida habanero del 2010 encontramos ser hombre, mayor de 65 años, reservado, impulsivo y caprichoso, ofreciendo como señales presuicidas las verbalizaciones suicidas, el cansancio de la vida y la deseperanza, y eligiendo como método para poner fin a su vida el ahorcamiento, seguido de la precipitación(AU)

Introduction: suicide is among the first ten death causes in the world, for what it must be regarded a sanitary problem of great magnitude that requires of all efforts of organizations of health in different latitudes, focussed to prevent and to control the suicidal behaviour. Objective: to identify characteristics of personality of a suicide group. Methods: it was carried out a quantitative retrospective study. The version of MPIA (Model of Psychological Integrated Autopsy) was used, which was validated in suicides. The universe was constituted by people who died by suicide in Havana during 2010, selecting at least two relatives or close people that has known intensely to each one of dead persons and that gave necessary information. The data of identities were taken from the register of death certificates in the Statistical Department of the Provincial Havana Health Direction.Results: predominated masculine subjects (74,2 percent), old adults (39,5 percent) whose characteristics in at least 30 percent were: reserved, little sociable, impulsive, capricious and stubborn. Conclusions: part of the havanan´s profile suicide in 2010 we found to be man, bigger than 65 years, reserved, impulsive and capricious, offering as signs of a future suicide: suicidal verbalizations, discomfort with the life, absence of expectation, and selecting like method to put an end to their life hanging up, followed by precipitation(AU)

Are there any significant variations in the clinical or histological presentation of lymphoid pathologies over the course of time in Spain?

INTRODUCTION: Little data is available concerning variations in the clinical characteristics of lymphoid neoplasms at presentation. We decided to investigate whether any variations in these characteristics had occurred in Spain during the last few years. MATERIALS AND METHODS: The GOTEL group database is an archive of all new lymphoma cases, regardless of their histological subtype, diagnosed in the hospitals within the group. An analysis was made of all the records between 1 January 1999 and 1 January 2009. Though the number of hospitals submitting data has changed over the course of time, data were provided by 26 hospitals from 16 Spanish provinces. RESULTS: A total of 3651 cases of lymphoma were recorded during this period. Grouped by clinical features, 42.8% (1561 patients) had low-grade lymphoma, 30.4% (1110 patients) intermediate-grade lymphoma and 15.2% (556 patients) Hodgkin's lymphoma; 208 patients had T lymphoma (5.7%), 111 patients high-grade lymphoma (3%) and 105 patients (2.9%) suffered lymphomas that were difficult to classify. A total of 6.3% of the diagnoses (231 patients) were made prior to 1999, 29.5% between 2000 and 2001, 25.7% between 2002 and 2003, 19.7% between 2004 and 2005, 11.2% between 2006 and 2007, and there were 200 entries from 2008 to the close of the study period, corresponding to 1.5% of the complete database. The median age at diagnosis was 60 (range 7-105 years), by percentiles: 25 corresponded to 44 years old, 50 to 60 years old and 75 to 71. Distribution by gender was 53.1% male and 46.9% female. An analysis was made of all the clinical variables collected, comparing their behaviour during the different diagnostic periods. The periods, gender, ECOG, stage, LDH, ß2 microglobulin, Hodgkin's or non- Hodgkin's type neoplasm, B lymphoma vs. Hodgkin's, NK or T, nodal or extra-nodal origin, median age at diagnosis and histological type by region of origin did not show any statistically significant differences in their distribution over the course of time. CONCLUSION: In our experience, there are no significant variations in clinical presentation or histological type in lymphomas diagnosed over the course of time in Spain.

Evaluacion anatomoangiografica del complejo de la arteria comunicante anterior en casos de aneurismas de dicho sector / anatomo-angyographic evaluation of anterior artery complex in aneurysm cases in that area

Objetivos: Analizar variantes anatomicas observadas en pacientes con aneurismas del complejo comunicante anterior evaluando la importancia de la dominancia de flujo en su formacion y ruptura. Materiales y metodos: analizamos las angiografaias digitales de 58 pacientes tratados por via endovascular y sus controles angiograficos. Para definir la direccion del aneurisma tomamos como punto cardinal la Arteria Comunicante Anterior (ACoA). Consideramos hipoplasico el segmento A1 -comunicante en 30 por ciento. La proyeccion de los aneurismas coincidio con la direccion A1 dominante. Conclusiones: los aneurismas del complejo comunicante anterior se originaron en el eje A1 dominante o isodominante. Los aneurismas de ACoA propiamente dicha se formaron cuando existia isodominancia. La hipoplasia es la unica variante anatomica correlacionable con aneurismas. El punto de ruptura fue coincidente con la direccion del flujo (AU)

Evaluacion anatomoangiografica del complejo de la arteria comunicante anterior en casos de aneurismas de dicho sector / anatomo-angyographic evaluation of anterior artery complex in aneurysm cases in that area

Objetivos: Analizar variantes anatomicas observadas en pacientes con aneurismas del complejo comunicante anterior evaluando la importancia de la dominancia de flujo en su formacion y ruptura. Materiales y metodos: analizamos las angiografaias digitales de 58 pacientes tratados por via endovascular y sus controles angiograficos. Para definir la direccion del aneurisma tomamos como punto cardinal la Arteria Comunicante Anterior (ACoA). Consideramos hipoplasico el segmento A1 -comunicante en 30 por ciento. La proyeccion de los aneurismas coincidio con la direccion A1 dominante. Conclusiones: los aneurismas del complejo comunicante anterior se originaron en el eje A1 dominante o isodominante. Los aneurismas de ACoA propiamente dicha se formaron cuando existia isodominancia. La hipoplasia es la unica variante anatomica correlacionable con aneurismas. El punto de ruptura fue coincidente con la direccion del flujo

Iatrogenia e interacción de drogas / Drugs interaction and iatrogeny

Se estudia el grave problema de la patología iatrogénica. EL MEDICO COMO FUENTE DE ENFERMEDAD que en la actualidad esta cobrando importancia creciente en todo el extenso campo de la medicina y de sus especialidades. Se propone un esquema de clasificación de la iatrogenia en general y se estudia en forma específica la iatrogenia medicamentosa, haciendo hincapié en los mecanismos y las causas determinantes. Se revisa la iatrogenia producida por interacción de drogas y se enumeran sus mecanismos. Por último, se formulan algunas sugerencias cuya adopción en opinión de los autores, podría contribuir a reducir el número y la gravedad de los accidentes de iatrogenia medicamentosa