Desarrollo de la interfaz y actualización del programa embebido del torno fresador

Se presenta el desarrollo de una interfaz y control para un torno fresador, que consiste en la elaboración de un programa embebido en una tarjeta con un microcontrolador de 32 Bits mediante lenguaje C. El sistema embebido almacena las instrucciones del código G en un archivo de texto mediante una memoria externa (SD). El intérprete se desarrolla de forma que sea fácil y sencillo el manejo para el usuario, para esto se incorpora una interfaz para el usuario. Para el funcionamiento de la interfaz hombre máquina se utiliza una pantalla de LCD 4x20 y un teclado alfanumérico donde el operador interactuara con las diferentes opciones que ofrece el menú. Se desarrollan tablillas de potencia, montaje y conexiones de control eléctrico de la maquina torno fresador

Sistema de dirección de helicóptero recreativo a través de internet usando dispositivos con sistema operativo android

En el siguiente artículo se tiene como objetivo el reemplazar el medio de comunicación basado en radio frecuencia que utilizan los helicópteros de radio control recreativos y substituirlo por un protocolo de comunicación a través de internet inalámbrico Wifi y utilizar un teléfono con sistema operativo Android como terminal de control, esto con el fin de desarrollar un sistema controlable desde internet y que sea capaz de utilizarse en un futuro como sistema de vigilancia. El método para el desarrollo para este Artículo se dividió en cuatro partes fundamentales: la interpretación del funcionamiento del helicóptero, el protocolo de comunicación, la programación de microcontroladores y la programación de aplicaciones para Android

. 20 Tomo III (1925) Cuarta Época (1922-1933). Anales del Museo Nacional de Arqueología, Historia y Etnografía

Publicación que recopila y difunde cien años de trabajo de la antropología en México (1877-1977), integrada por documentos y manuscritos arqueológicos, antropológicos, históricos, geológicos, botánicos y lingüísticos.- Inventario de los documentos recogidos a don Lorenzo Boturini por orden real del gobierno virreinal intérprete general por Patricio Ana López. - La Quemada, noticia tomada del diario del capitán don Félix Calleja. Documentos proporcionados por don Nicolás Rangel por Félix Calleja. - Una nueva zona arqueológica en Sinaloa por Alfonso Toro. - Códice del archivo de los Duques de Monteleone y Terranova y Marqueses del valle de Oaxaca por Alfonso Toro. - Declaración del indio Delmas en el juicio seguido por Hernán Cortés contra Nuño de Guzmán, paleografía por Francisco Fernández del Castillo. - Explicación de pinturas por Francisco Fernández del Castillo. - Últimos momentos y conversión de Luis de Carvajal por Francisco Fernández del Castillo. - La suspicacia de la corte de España y el libro del canónigo don Manuel de Sandoval por Luis González Obregón. - El abanico a través de los tiempos por Valerio Prieto. - El Santuario de Chalma por Miguel Othón de Mendizabal. - Nota sobre la lengua chinanteca por Pablo González Casanova. - Vocabulario chinanteca, recopildador por Ángel Soliz. - Reseña de la celebración del Primer Centenario del Museo Nacional. - Palabras del director del Museo Nacional don Alfonso Toro por Alfonso Toro. - Discurso pronunciado por Alfonso Teja Zabre en el anfiteatro de la Escuela Nacional Preparatoria por Mauricio Swadesh. - Elegía gentil por Rafael López. - Ruinas de Zayíl por José Reygadas Vértiz. - Carta de Hernán Cortés. Marques del Valle a su pariente y procurador ad litem don Francisco Nuñez por Mariano Cuevas. - Los acueductos de México por Manuel Romero de Terreros. - Epigrafía queretana por Valentín Frías. - La lengua chinanteca del estado de Oaxaca, México por Rudolf Schuller. - Notas bibliográficas por Mariano Silva y Aceves, Pablo González Casanova, Eduardo Noguera y A. González Cortés. - Nuevas adquisiciones del Nuevo Museo. - Convocatoria para el concurso "Ginés Vázquez del Mercado". - Convocatoria para un concurso del Museo Nacional. - Apuntes sobre el jeroglífico Maya Ek, "Negro" por Hermann Beyer. - Descubrimientos arqueológicos en el Templo de Quetzalcoatl (Teotihuacan) por Pedro J. Dosal. - Representaciones prehispánicas de dientes humanos hechas en concha por Paul Siliceo Pauer. - Fray Diego Durán. Aclaraciones históricas por Francisco Fernández del Castillo. - La fundación de México-Tenochtitlan por Enrique Juan Palacios. - Epigrafía queretana por Valentín Frías. - La colección folklórica de la Biblioteca del Museo Nacional por Mariano Silva y Aceves. - La colección folklórica de la Biblioteca del Museo Nacional. Apéndice de los documentos que en el se citan por Mariano Silva y Aceves. - Notas bibliográficas por Alfredo Toro, Paul Siliceo Pauer, Eduardo Noguera, Eugenio Gómez Maillefert y Mariano Silva y Aceves. - Nuevas adquisiciones del Museo Nacional. - Concurso del Museo Nacional. - Fe de erratas. La fundación de México–Tenochtitlan por Enrique Juan Palacios. - Los instrumentos musicales de los antiguos mexicanos por Rubén M. Campos. - Índice craneométrico de los indígenas prehispánicos y actuales de la Mesa Central de México por Paul Siliceo Pauer. - Fray Alonso de Molina. Aclaraciones históricas por Francisco Fernández del Castillo. - Anexo al estudio las aclaraciones históricas. Fray Alonso de Molina por Lota Spell. – Tabaqueras por Valerio Prieto. - Carta que escribió Rodrigo de Albornoz al capitán Luis de León por Antonio Solar. - El juego de pelota de Chichen-Itzá, Yucatán por Miguel Ángel Fernández. - El zarape por Ramón Mena. - Notas sobre el mangue dialecto extinguido hablado antiguamente en Nicaragua. Traducción y notas de Marcos E. Becerra por Daniel G. Brinton. - Notas bibliográficas por Pablo González Casanova, Paul Siliceo Pauer, Eduardo Noguera y Eugenio Gómez Maillefert. - Lista de adquisiciones por donación y compra hechas por este Museo. - El centenario de la rendición del Castillo de San Juan de Ulúa por Francisco de P. Sentíes. - La carta cifrada de don Hernán Cortés. - Representación del búho en la cultura teotihuacana por Eduardo Noguera. - Fray Agustín Dávila Padilla arzobispo de Santo Domingo por Francisco Fernández del Castillo. - Una carta del padre Aquiles Gerste acerca de la educación de la raza tarahumara por Aquiles Gerste. - Los gobernantes de Michoacán durante un siglo por Jesús Romero Flores. - Los idiomas popolocas y su clasificación por Pablo González Casanova. - Noticias y reflexiones sobre la guerra que se tiene con los apaches en la provincia de la Nueva España, por don Bernando de Gálvez por Felipe Teixidor. - El testamento de Hernán Cortés, estudio leído en la Sociedad Mexicana de Geografía y Estadística en sesión del 1°de octubre de 1925 por Francisco Fernández del Castillo. - Adquisiciones por donación y compra

Candida bloodstream infections in intensive care units: analysis of the extended prevalence of infection in intensive care unit study

Item does not contain fulltextOBJECTIVES: To provide a global, up-to-date picture of the prevalence, treatment, and outcomes of Candida bloodstream infections in intensive care unit patients and compare Candida with bacterial bloodstream infection. DESIGN: A retrospective analysis of the Extended Prevalence of Infection in the ICU Study (EPIC II). Demographic, physiological, infection-related and therapeutic data were collected. Patients were grouped as having Candida, Gram-positive, Gram-negative, and combined Candida/bacterial bloodstream infection. Outcome data were assessed at intensive care unit and hospital discharge. SETTING: EPIC II included 1265 intensive care units in 76 countries. PATIENTS: Patients in participating intensive care units on study day. INTERVENTIONS: None. MEASUREMENT AND MAIN RESULTS: Of the 14,414 patients in EPIC II, 99 patients had Candida bloodstream infections for a prevalence of 6.9 per 1000 patients. Sixty-one patients had candidemia alone and 38 patients had combined bloodstream infections. Candida albicans (n = 70) was the predominant species. Primary therapy included monotherapy with fluconazole (n = 39), caspofungin (n = 16), and a polyene-based product (n = 12). Combination therapy was infrequently used (n = 10). Compared with patients with Gram-positive (n = 420) and Gram-negative (n = 264) bloodstream infections, patients with candidemia were more likely to have solid tumors (p < .05) and appeared to have been in an intensive care unit longer (14 days [range, 5-25 days], 8 days [range, 3-20 days], and 10 days [range, 2-23 days], respectively), but this difference was not statistically significant. Severity of illness and organ dysfunction scores were similar between groups. Patients with Candida bloodstream infections, compared with patients with Gram-positive and Gram-negative bloodstream infections, had the greatest crude intensive care unit mortality rates (42.6%, 25.3%, and 29.1%, respectively) and longer intensive care unit lengths of stay (median [interquartile range]) (33 days [18-44], 20 days [9-43], and 21 days [8-46], respectively); however, these differences were not statistically significant. CONCLUSION: Candidemia remains a significant problem in intensive care units patients. In the EPIC II population, Candida albicans was the most common organism and fluconazole remained the predominant antifungal agent used. Candida bloodstream infections are associated with high intensive care unit and hospital mortality rates and resource use

30-Day morbidity and mortality of bariatric metabolic surgery in adolescence during the COVID-19 pandemic – The GENEVA study

Background: Metabolic and bariatric surgery (MBS) is an effective treatment for adolescents with severe obesity. Objectives: This study examined the safety of MBS in adolescents during the coronavirus disease 2019 (COVID-19) pandemic. Methods: This was a global, multicentre and observational cohort study of MBS performed between May 01, 2020, and October 10,2020, in 68 centres from 24 countries. Data collection included in-hospital and 30-day COVID-19 and surgery-specific morbidity/mortality. Results: One hundred and seventy adolescent patients (mean age: 17.75 ± 1.30 years), mostly females (n&nbsp;=&nbsp;122, 71.8%), underwent MBS during the study period. The mean pre-operative weight and body mass index were 122.16 ± 15.92 kg and 43.7&nbsp;± 7.11 kg/m2, respectively. Although majority of patients had pre-operative testing for severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) (n&nbsp;=&nbsp;146; 85.9%), only 42.4% (n&nbsp;=&nbsp;72) of the patients were asked to self-isolate pre-operatively. Two patients developed symptomatic SARS-CoV-2 infection post-operatively (1.2%). The overall complication rate was 5.3% (n&nbsp;=&nbsp;9). There was no mortality in this cohort. Conclusions: MBS in adolescents with obesity is safe during the COVID-19 pandemic when performed within the context of local precautionary procedures (such as pre-operative testing). The 30-day morbidity rates were similar to those reported pre-pandemic. These data will help facilitate the safe re-introduction of MBS services for this group of patients

30-Day Morbidity and Mortality of Bariatric Surgery During the COVID-19 Pandemic: a Multinational Cohort Study of 7704 Patients from 42 Countries.

BACKGROUND There are data on the safety of cancer surgery and the efficacy of preventive strategies on the prevention of postoperative symptomatic COVID-19 in these patients. But there is little such data for any elective surgery. The main objectives of this study were to examine the safety of bariatric surgery (BS) during the coronavirus disease 2019 (COVID-19) pandemic and to determine the efficacy of perioperative COVID-19 protective strategies on postoperative symptomatic COVID-19 rates. METHODS We conducted an international cohort study to determine all-cause and COVID-19-specific 30-day morbidity and mortality of BS performed between 01/05/2020 and 31/10/2020. RESULTS Four hundred ninety-nine surgeons from 185 centres in 42 countries provided data on 7704 patients. Elective primary BS (n = 7084) was associated with a 30-day morbidity of 6.76% (n = 479) and a 30-day mortality of 0.14% (n = 10). Emergency BS, revisional BS, insulin-treated type 2 diabetes, and untreated obstructive sleep apnoea were associated with increased complications on multivariable analysis. Forty-three patients developed symptomatic COVID-19 postoperatively, with a higher risk in non-whites. Preoperative self-isolation, preoperative testing for SARS-CoV-2, and surgery in institutions not concurrently treating COVID-19 patients did not reduce the incidence of postoperative COVID-19. Postoperative symptomatic COVID-19 was more likely if the surgery was performed during a COVID-19 peak in that country. CONCLUSIONS BS can be performed safely during the COVID-19 pandemic with appropriate perioperative protocols. There was no relationship between preoperative testing for COVID-19 and self-isolation with symptomatic postoperative COVID-19. The risk of postoperative COVID-19 risk was greater in non-whites or if BS was performed during a local peak

Safety of Bariatric Surgery in ≥ 65-Year-Old Patients During the COVID-19 Pandemic

Background Age &gt;= 65 years is regarded as a relative contraindication for bariatric surgery. Advanced age is also a recognised risk factor for adverse outcomes with Coronavirus Disease-2019 (COVID-19) which continues to wreak havoc on global populations. This study aimed to assess the safety of bariatric surgery (BS) in this particular age group during the COVID-19 pandemic in comparison with the younger cohort.Methods We conducted a prospective international study of patients who underwent BS between 1/05/2020 and 31/10/2020. Patients were divided into two groups - patients &gt;= 65-years-old (Group I) and patients &lt; 65-years-old (Group II). The two groups were compared for 30-day morbidity and mortality.Results There were 149 patients in Group 1 and 6923 patients in Group II. The mean age, preoperative weight, and BMI were 67.6 +/- 2.5 years, 119.5 +/- 24.5 kg, and 43 +/- 7 in Group I and 39.8 +/- 11.3 years, 117.7 +/- 20.4 kg, and 43.7 +/- 7 in Group II, respectively. Approximately, 95% of patients in Group 1 had at least one co-morbidity compared to 68% of patients in Group 2 (p = &lt; 0.001). The 30-day morbidity was significantly higher in Group I ( 11.4%) compared to Group II (6.6%) (p = 0.022). However, the 30-day mortality and COVID-19 infection rates were not significantly different between the two groups.Conclusions Bariatric surgery during the COVID-19 pandemic is associated with a higher complication rate in those &gt;= 65 years of age compared to those &lt; 65 years old. However, the mortality and postoperative COVID-19 infection rates are not significantly different between the two groups

Effect of BMI on safety of bariatric surgery during the COVID-19 pandemic, procedure choice, and safety protocols - An analysis from the GENEVA Study

Background: It has been suggested that patients with a Body Mass Index (BMI) of &gt; 60 kg/m2 should be offered expedited Bariatric Surgery (BS) during the Coronavirus Disease-2019 (COVID-19) pandemic. The main objective of this study was to assess the safety of this approach. Methods: We conducted a global study of patients who underwent BS between 1/05/2020 and 31/10/2020. Patients were divided into three groups according to their preoperative BMI -Group I (BMI &lt; 50 kg/m2), Group II (BMI 50-60 kg/m2), and Group III (BMI &gt; 60 kg/m2). The effect of preoperative BMI on 30-day morbidity and mortality, procedure choice, COVID-19 specific safety protocols, and comorbidities was assessed. Results: This study included 7084 patients (5197;73.4 % females). The mean preoperative weight and BMI were 119.49 &amp; PLUSMN; 24.4 Kgs and 43.03 &amp; PLUSMN; 6.9 Kg/m2, respectively. Group I included 6024 (85 %) patients, whereas Groups II and III included 905 (13 %) and 155 (2 %) patients, respectively.The 30-day mortality rate was higher in Group III (p = 0.001). The complication rate and COVID-19 infection were not different. Comorbidities were significantly more likely in Group III (p = &lt; 0.001). A significantly higher proportion of patients in group III received Sleeve Gastrectomy or One Anastomosis Gastric Bypass compared to other groups. Patients with a BMI of &gt; 70 kg/m2 had a 30-day mortality of 7.7 % (2/26). None of these patients underwent a Roux-en-Y Gastric Bypass. Conclusion: The 30-day mortality rate was significantly higher in patients with BMI &gt; 60 kg/m2. There was, however, no significant difference in complications rates in different BMI groups, probably due to differences in procedure selection