ESTUDIO Y ANÁLISIS DE LAS LISTAS DE DISTRIBUCIÓN EN PROYECTOS DE SOFTWARE DE CÓDIGO ABIERTO COMO MEDIO PARA COMPARTIR CONOCIMIENTO

RESUMENEste trabajo explora el papel desempeñado por las listas de distribución en proyectos de software de código abierto como herramienta para compartir conocimiento y resolver problemas. Uno de los principales beneficios que las empresas pueden obtener del uso de software de código abierto es la colaboración informal en desarrollo de aplicaciones. La herramienta más importante para esa colaboración y coordinacion son las listas de correo, seguido por los foros de discusión asíncronos, informes de bugs y chat. Uno de los argumentos principales a la hora de decidirse por una distribución de Linux embebido es el soporte proporcionado a los desarrolladores. Pero generalmente, es difícil tomar una decisión a priori sin conocer si el soporte proporcionado será lo suficientemente bueno durante todo el futuro desarrollo del proyecto. Para ayudar en esta tarea, este trabajo se centra en analizar el comportamiento y la actividad de las listas de correo para extraer una serie de parámetros que puedan aportar información sobre la calidad y la evolución de la lista. Esta información resultaría relevante para analizar y decidir sobre la mejor distribución de Linux embebido a utilizar.ABSTRACTThis research explores the role of mailing lists in open source software projects as a tool for knowledge sharing and problem resolution. One of the benefits that firms can derive from using Open Source Software (OSS) is informal development collaboration. The primary tool for collaboration and coordination are group mailing lists, followed by asynchronous discussion forums, bug reports, and chat. One of the main arguments when deciding about an embedded Linux distribution is the support provided to developers. However, it is usually difficult to decide a priori if the provided support will be good enough for the future development of the project. Particularly, the behaviour and activity of mailing list are analyzed to extract a set of parameters that could inform about the quality and the evolution of the list. This information could be useful to decide the best embedded distribution to be implemented

Predictors for anastomotic leak, postoperative complications, and mortality after right colectomy for cancer: Results from an international snapshot audit

Background: A right hemicolectomy is among the most commonly performed operations for colon cancer, but modern high-quality, multination data addressing the morbidity and mortality rates are lacking. Objective: This study reports the morbidity and mortality rates for right-sided colon cancer and identifies predictors for unfavorable short-term outcome after right hemicolectomy. Design: This was a snapshot observational prospective study. Setting: The study was conducted as a multicenter international study. Patients: The 2015 European Society of Coloproctology snapshot study was a prospective multicenter international series that included all patients undergoing elective or emergency right hemicolectomy or ileocecal resection over a 2-month period in early 2015. This is a subanalysis of the colon cancer cohort of patients. Main Outcome Measures: Predictors for anastomotic leak and 30-day postoperative morbidity and mortality were assessed using multivariable mixed-effect logistic regression models after variables selection with the Lasso method. Results: Of the 2515 included patients, an anastomosis was performed in 97.2% (n = 2444), handsewn in 38.5% (n = 940) and stapled in 61.5% (n = 1504) cases. The overall anastomotic leak rate was 7.4% (180/2444), 30-day morbidity was 38.0% (n = 956), and mortality was 2.6% (n = 66). Patients with anastomotic leak had a significantly increased mortality rate (10.6% vs 1.6% no-leak patients; p 65 0.001). At multivariable analysis the following variables were associated with anastomotic leak: longer duration of surgery (OR = 1.007 per min; p = 0.0037), open approach (OR = 1.9; p = 0.0037), and stapled anastomosis (OR = 1.5; p = 0.041). Limitations: This is an observational study, and therefore selection bias could be present. For this reason, a multivariable logistic regression model was performed, trying to correct possible confounding factors. Conclusions: Anastomotic leak after oncologic right hemicolectomy is a frequent complication, and it is associated with increased mortality. The key contributing surgical factors for anastomotic leak were anastomotic technique, surgical approach, and duration of surgery