Burr detection and classification using RUSTICO and image processing

.Machined workpieces must satisfy quality standards such as avoid the presence of burrs in edge finishing to reduce production costs and time. In this work we consider three types of burr that are determined by the distribution of the edge shape on a microscopic scale: knife-type (without imperfections), saw-type (presence of small splinters that could be accepted) and burr-breakage (substantial deformation that produces unusable workpieces). The proposed method includes RUSTICO to classify automatically the edge of each piece according to its burr type. Experimental results validate its effectiveness, yielding a 91.2% F1-Score and identifying completely the burr-breakage type.S

Sensibilidad ética empresarial

Considerando los distintos sucesos nacionales e internacionales que han puesto en duda el comportamiento ético de ejecutivos de empresas, surge la necesidad de investigar cuáles son las variables relevantes que podrían influir en la sensibilidad ética de los directivos. Este estudio contribuye, por una parte, con un modelo explicativo sobre el grado de sensibilidad ética de los ejecutivos de empresas y, por otra, con evidencia empírica a través de una encuesta auto-adminis­trada aplicada a 143 de ellos en Chile. Los resultados corroboran que existen relaciones positivas y significativas entre las variables planteadas en el modelo y la sensibilidad ética. Asimismo, la inves­tigación identifica diferencias entre grupos de ejecutivos con o sin código de ética en su empresa y entre grupos según su variable de género

Your Teammate Just Sent You a New Message! The Effects of Using Telegram on Individual Acquisition of Teamwork Competence

Students’ acquisition of teamwork competence has become a priority for educational institutions. The development of teamwork competence in education generally relies in project-based learning methodologies and challenges. The assessment of teamwork in project-based learning involves, among others, assessing students’ participation and the interactions between team members. Project-based learning can easily be handled in small-size courses, but course management and teamwork assessment become a burdensome task for instructors as the size of the class increases. Additionally, when project-based learning happens in a virtual space, such as online learning, interactions occur in a less natural way. This study explores the use of instant messaging apps (more precisely, the use of Telegram) as team communication space in project-based learning, using a learning analytics tool to extract and analyze student interactions. Further, the study compares student interactions (e.g., number of messages exchanged) and individual teamwork competence acquisition between traditional asynchronous (e.g., LMS message boards) and synchronous instant messaging communication environments. The results show a preference of students for IM tools and increased participation in the course. However, the analysis does not find significant improvement in the acquisition of individual teamwork competence

Evaluación del resultado académico de los estudiantes a partir del análisis del uso de los Sistemas de Control de Versiones

Version Control Systems are commonly used by Information and Communication Technology professionals. These systems allow for monitoring programmers' activity working in a project. Thus, the usage of such systems should be encouraged by educational institutions. The aim of this work is to evaluate if students’ academic success can be predicted by monitoring their interaction with a Version Control System. In order to do so, we have built a model that predicts students’ results in a specific practical assignment of the Operating Systems Extension subject. A second-year subject in the degree in Computer Science at the University of León. In order to obtain a prediction, the model analyzes students’ interaction with a Git repository. To build the model, several classifiers and predictors have been evaluated by using the MoEv tool. The tool allows for evaluating several classification and prediction models in order to get the most suitable one for a specific problem. Prior to the model development, Moev performs a feature selection from input data to select the most significant ones. The resulting model has been trained using results from the 2016 – 2017 course year. Later, in order to ensure an optimal generalization, the model has been validated by using results from the 2017 – 2018 course. Results conclude that the model predicts students' outcomes? with a success high percentage.Una de las herramientas más utilizadas por los profesionales de las tecnologías de la información y la comunicación son los sistemas de control de versiones. Estas herramientas permiten, entre otras cosas, monitorizar la actividad de las personas que trabajan en un proyecto. Por tanto, es recomendable que se utilicen también en las instituciones educativas. El objetivo de este trabajo es evaluar si el resultado académico de los estudiantes se puede predecir monitorizando su actividad en uno de estos sistemas. Para tal efecto, hemos construido un modelo que predice el resultado de los estudiantes en una práctica de la asignatura Ampliación de Sistemas Operativos, perteneciente al segundo curso del grado en Ingeniería Informática de la Universidad de León. Para obtener la predicción, el modelo analiza la interacción del estudiante con un repositorio Git. Para diseñar el modelo, se evalúan varios modelos de clasificación y predicción utilizando la herramienta MoEv. Esta herramienta permite entrenar y validar diferentes modelos de clasificación y obtener el más adecuado para un problema concreto. Además, la herramienta permite identificar las características más discriminantes dentro de los datos de entrada. El modelo resultante ha sido entrenado utilizando los resultados del curso 2016 – 2017. Posteriormente, para asegurar que el modelo generaliza correctamente, se ha validado utilizando datos del curso 2017 – 2018. Los resultados concluyen que el modelo predice el éxito de los estudiantes con un alto porcentaje de acierto

Fuga de cerebros: el mercado de talentos y sus secuelas / Brain drain: the market of talents and its after-effects

El objetivo de este trabajo ha sido revisar los antecedentes, situaciones y consecuencias del flujo de cerebros hacia los países más desarrollados. Su repercusión mundial, y en Cuba. Se realiza una revisión del tema mediante análisis documental. La fuga de cerebros es un fenómeno global, y no nuevo, pero que ha cambiado su matiz, para pasar a formar parte de la expropiación de las personas por las grandes transnacionales y países del primer mundo, con repercusiones negativas en sus países de origen. Se analiza el caso de Cuba, y cómo se ha logrado actuar en contra de esta nefasta actuación, y las posibilidades de la solidaridad, y la cooperación Sur-Sur en la formación de capital humano, así como la exportación de capital humano con repercusión positiva en la economía cubana. Palabras clave: economía, ciencia, recursos humanos en salud. ABSTRACT This research paper was aimed at making a brief review about the antecedents, situations and consequences of the brain drain to the most developed countries. Its world repercussion and those in Cuba were also reviewed. The paper was conducted by means of a documentary analysis. Brain drain is not new, it is a global phenomenon in current times, but its nature has changed, and it is part of the expropriation of people by the huge transnational companies and First World Countries, which have a negative impact on the origin countries of the emigrated. Cuban case was analyzed and the actions taken to counteract this inauspicious performance were shown. The possibilities of solidarity; South-South cooperation in the formation of highly skilled human resources, so as the positive repercussion of the exportation of these human resources on the Cuban economy were also discussed. Key words: economy, science, health manpower

Fuga de cerebros: el mercado de talentos y sus secuelas / Brain drain: the market of talents and its after-effects

El objetivo de este trabajo ha sido revisar los antecedentes, situaciones y consecuencias del flujo de cerebros hacia los países más desarrollados. Su repercusión mundial, y en Cuba. Se realiza una revisión del tema mediante análisis documental. La fuga de cerebros es un fenómeno global, y no nuevo, pero que ha cambiado su matiz, para pasar a formar parte de la expropiación de las personas por las grandes transnacionales y países del primer mundo, con repercusiones negativas en sus países de origen. Se analiza el caso de Cuba, y cómo se ha logrado actuar en contra de esta nefasta actuación, y las posibilidades de la solidaridad, y la cooperación Sur-Sur en la formación de capital humano, así como la exportación de capital humano con repercusión positiva en la economía cubana. Palabras clave: economía, ciencia, recursos humanos en salud. ABSTRACT This research paper was aimed at making a brief review about the antecedents, situations and consequences of the brain drain to the most developed countries. Its world repercussion and those in Cuba were also reviewed. The paper was conducted by means of a documentary analysis. Brain drain is not new, it is a global phenomenon in current times, but its nature has changed, and it is part of the expropriation of people by the huge transnational companies and First World Countries, which have a negative impact on the origin countries of the emigrated. Cuban case was analyzed and the actions taken to counteract this inauspicious performance were shown. The possibilities of solidarity; South-South cooperation in the formation of highly skilled human resources, so as the positive repercussion of the exportation of these human resources on the Cuban economy were also discussed. Key words: economy, science, health manpower

Development of a VR application for binge eating treatment: identification of contexts and cues related to bingeing behavior in spanish italian patients

The objective of this study was to identify frequent situations and specific cues that produce the craving to binge in Spanish and Italian samples of patients with eating disorders (ED). There were two main aims: to assess transcultural differences in the contexts and cues that elicit food craving; and to develop valid, reliable VR environments for effective cue-exposure therapy (CET) for patients from both countries. Twenty-six Spanish and 75 Italian ED patients completed an ad hoc questionnaire to assess contexts and cues that trigger the craving to binge. No differences between groups were found. All patients reported experiencing higher levels of craving in the afternoon/early evening and in the late evening/night, between meals, when alone, and more frequently at the end of the week. Being in the dining room, the kitchen, the bedroom, the bakery and the supermarket were the specific situations that produced the highest levels of craving to binge. We used the questionnaire results to develop a virtual reality application for CET

External eating as a predictor of cue-reactivity to food-related virtual environments

The objective of this study was to assess the association between external eating style and food craving experienced during exposure to food cues in virtual reality (VR) environments in both clinical and non-clinical samples. According to the externality theory, people with external eating experience higher reactivity when exposed to food cues, which in turn increases the probability of overeating. Forty patients with eating disorders (23 with bulimia nervosa and 17 with binge eating disorder) and 78 undergraduate students were exposed to 10 different food cues in four VR environments (kitchen, dining room, bedroom, and café). After 30 seconds of exposure to each VR environment, food craving was assessed using a visual analog scale. External, emotional and restrictive eating styles were also assessed using the DEBQ. The results showed a strong association between external eating and cue-elicited food craving. After controlling for the presence of eating disorder diagnosis, external eating was the best predictor of reported food craving. The results lend support to the externality theory but highlight the need for further research in specific patterns of functioning in patients with bulimia nervosa and binge eating disorder

Eating behavior style predicts craving and anxiety experienced in food-related virtual environments by patients with eating disorders and healthy controls

Eating behavior style (emotional, restrictive, or external) has been proposed as an explanation for the differences in response to food-related cues between people who overeat and those who do not, and has been also considered a target for the treatment of eating disorders (EDs) characterized by lack of control over eating and weightrelated (overweight/obesity) conditions. The aim of this study was to analyze the relationship between eating behavior style and psychophysiological responses (self-reported food craving and anxiety) to food-related virtual reality (VR) environments in outpatients with bulimia nervosa (BN) and binge eating disorder (BED) and to compare them with healthy participants. Fifty-eight outpatients and 135 healthy participants were exposed to palatable foods in four experimental everyday real-life VR environments (kitchen, dining room, bedroom and café). During exposure, cue-elicited food craving and anxiety were assessed. Participants also completed standardized instruments for the study purposes. ED patients reported significantly higher levels of craving and anxiety when exposed to the virtual food than healthy controls. Eating behavior styles showed strong associations with cue-elicited food craving and anxiety. In the healthy group, external eating was the only predictor of cue-elicited craving and anxiety. In participants with BN and BED, external and emotional eating were the best predictors of cue-elicited craving and anxiety, respectively

Meningitis por criptococo y trombosis venosa cerebral en paciente sicklémica

A 47-year-old woman diagnosed with sickle cell anemia and a vaso-occlusive crisis in the brain was admitted with fever, general malaise and headache, with transient episodes of disorientation. In her evolution, there was a motor defect in the right side, dysarthria and convulsive seizures refractory to therapy. The cranial tomographic study revealed a hypodense image in the left parietal lobe in relation with an infarction, and evidence of contrast enhancement in the turns in the affected area due to cortical vein thrombosis. The patient had a torpid evolution, and died with neurological impairment and septic respiratory symptoms. At necropsy, it was concluded the presence of Cryptococcus neoformans meningitis and cerebral venous thrombosis in a sickle cell anemia patient, associated with severe bilateral bacterial bronchopneumonia that lead to her death. Infections in immunocompromised patients, and especially fungal infections, may not be suspected and may not be treated, as occurred with this patient. This fact, and the association with cerebral venous thrombosis, motivated a discussion in the clinicopathological session of the institution. The study of the autopsy is reported, as well as a review of the condition as a way of focusing attention on opportunistic fungal infections. This is another tough battleground for the diagnosis and treatment of patients, in which the main weapon is the proper use of the epidemiological-clinical method in all medical specialties – efforts must be directed that way.Mujer de 47 años de edad con diagnóstico de sicklemia y crisis vaso-oclusiva cerebral que fue ingresada por fiebre, toma del estado general y cefalea, con episodios de desorientación transitoria; en su evolución aparecieron un defecto motor derecho, disartria y episodios convulsivos refractarios a la terapéutica. El estudio tomográfico de cráneo reveló una imagen hipodensa en el lóbulo parietal izquierdo en relación con infarto, así como evidencias de realce de contraste en los giros en el área afectada debido a trombosis de venas corticales. Evolucionó tórpidamente y falleció con deterioro neurológico y cuadro respiratorio séptico. En la necropsia se concluyó: meningitis por Cryptococcus neoformans y trombosis venosa cerebral, asociadas a bronconeumonía bacteriana bilateral severa en paciente sicklémica, todo lo que la conduce a la muerte. Las infecciones en el paciente inmunodeprimido, y en especial las infecciones por hongos, pueden no ser sospechadas ni tratadas, como sucedió en este caso; este hecho, y la asociación con trombosis venosa cerebral, motivaron a discusión en Sesión Clínico-Patológica Institucional. Se presenta el estudio de la autopsia y la revisión de la enfermedad como forma de enfocar la atención en las infecciones micóticas oportunistas, otro duro campo de batalla para el diagnóstico y el tratamiento de los enfermos, cuya arma fundamental es el empleo adecuado del método clínico en todas las especialidades médicas, hacia lo que se deben dirigir los esfuerzos