A new self-organizing neural gas model based on Bregman divergences

In this paper, a new self-organizing neural gas model that we call Growing Hierarchical Bregman Neural Gas (GHBNG) has been proposed. Our proposal is based on the Growing Hierarchical Neural Gas (GHNG) in which Bregman divergences are incorporated in order to compute the winning neuron. This model has been applied to anomaly detection in video sequences together with a Faster R-CNN as an object detector module. Experimental results not only confirm the effectiveness of the GHBNG for the detection of anomalous object in video sequences but also its selforganization capabilities.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tec

TP30 210. Tratamiento de la fibrilación auricular mediante ablación con ultrasonidos concomitante a otra cirugía cardíaca. Resultados a largo plazo en nuestro centro

Introducción y objetivosActualmente la ablación quirúrgica de la fibrilación auricular (FA) es un procedimiento simple que puede realizarse en la mayoría de los pacientes durante la cirugía cardíaca. Presentamos nuestros resultados a largo plazo en ablación con ultrasonidos.Pacientes y métodosEn 23 pacientes con diferentes afecciones quirúrgicas cardíacas y FA (12 pacientes con FA permanente, 2 con FA persistente, 7 con FA paroxística, 1 paciente con fibrilo-flutter y un paciente con flutter auricular aislado), se asoció la ablación con ultrasonidos con el dispositivo UltraCinch™ Epicor, durante 2007–2008. El tamaño preoperatorio por ecocardiografía (ECO) de la aurícula izquierda (AI) fue de 45mm (rango 34–55). En un paciente no pudo realizarse por fallo de la consola.ResultadosNo hubo mortalidad intrahospitalaria. Un paciente precisó un marcapasos definitivo. Dos casos registrados de accidente cerebrovascular (ACV). Tras el procedimiento el 63,6% de los pacientes recuperó el ritmo sinusal, bajando al 54% de los pacientes en el momento del alta. A los 6 meses el 63% de los pacientes se encontraban en ritmo sinusal (RS) y a los 12 meses el 68%. Tras un seguimiento de 4 años obtenemos que sólo el 45% de los pacientes mantiene el RS, de los cuales el 20% tiene episodios de FA paroxística.ConclusiónLa ablación mediante ultrasonidos (US) de la FA es un procedimiento sencillo, reproducible y seguro, siendo su efectividad a corto y medio plazo similar a la de otros procedimientos de ablación. En nuestra corta serie, su eficacia a largo plazo disminuye significativamente

Color Space Selection for Self-Organizing Map Based Foreground Detection in Video Sequences

The selection of the best color space is a fundamental task in detecting foreground objects on scenes. In many situations, especially on dynamic backgrounds, neither grayscale nor RGB color spaces represent the best solution to detect foreground objects. Other standard color spaces, such as YCbCr or HSV, have been proposed for background modeling in the literature; although the best results have been achieved using diverse color spaces according to the application, scene, algorithm, etc. In this work, a color space and color component weighting selection process is proposed to detect foreground objects in video sequences using self-organizing maps. Experimental results are also provided using well known benchmark videos.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Influence of the Lubrication Conditions on the Surface Finish of Turned Aeronautical Aluminium Alloys. A preliminary Study

Nowadays, one of the main objectives that affects the development of any new product is the respect for the environment. Until the late 80's, the development and manufacture of the most of the product were aimed to achieve maximum quality in time and costs with environmental issues relegated to secondary importance. On the other hand, in the 90's, the pressure from factors such as markets, financial and legislative factors, led to environmental considerations being taken into account. In this context, the current aeronautical industry strategies are based on the search for economic, environmental and energy efficiency considerations for all the processes involved in the aircraft manufacturing

Insights into the room temperature magnetism of ZnO/Co3O4 mixtures

The origin of room temperature (RT) ferromagneticlike behavior in ZnO-based diluted magnetic semiconductors is still an unclear topic. The present work concentrates on the appearance of RT magnetic moments in just mixed ZnO/Co3O4 mixtures without thermal treatment. In this study, it is shown that the magnetism seems to be related to surface reduction of the Co3O4 nanoparticles, in which, an antiferromagnetic Co3O4 nanoparticle (core) is surrounded by a CoO-like shell. This singular superficial magnetism has also been found in other mixtures with semiconductors such as TiO2 and insulators such as Al2O3

Autoeficacia y lesiones deportivas : ¿factor protector o de riesgo?

El presente estudio analiza el efecto de la autoeficacia en la lesión deportiva y en qué medida ese efecto se ve mediado por las estrategias de afrontamiento ante la situación competitiva que los deportistas exhiban. se evaluaron el Número de Lesiones en los últimos 12 meses, la Autoeficacia General y las estrategias de Afrontamiento de 245 deportistas. Un análisis de regresión mostró que dos de las estrategias de afrontamiento: calma emocional y tendencia al riesgo, predecían el padecimiento de un menor o mayor número de lesiones, respectivamente. Un path analysis mostró que la Autoeficacia no incidía directamente en el número de lesiones sino que las estrategias de afrontamiento mediaban esa relación. contra lo esperado, una mayor autoeficacia induce tanto estrategias que llevan a intentar nuevas alternativas y opciones arriesgadas (conductas de riesgo) como otras que intentan controlar las emociones negativas (calma emocional) que, supuestamente, estarían relacionadas con menores conductas de riesgo. en el primer caso incrementando y en el segundo decrementando la vulnerabilidad a las lesiones.The present paper analyses the effect of self-efficacy in sports injury and to what extent such effect is mediated by coping strategies to competitive situations shown by athletes. 245 sportspeople were assessed regarding the number of injuries suffered the last 12 months, General selfefficacy and coping strategies. regression analysis proved that two coping strategies, emotional calming and risk behavior, predicted the suffering of less or more injuries, respectively. A path analysis showed that self-efficacy was not directly related to the number of injuries but indirectly through coping strategies. Unexpectedly, the greater self-efficacy induces both coping strategies oriented to trying new options and risky alternatives (risk behavior) and coping strategies directed to control negative emotions (emotional calming) which would supposedly be related to least risk-taking behaviors, the former increasing and the later decreasing vulnerability to sports injury.O presente estudo analisa o efeito da autoeficacia na lesão esportiva e em que medida este efeito é mediado por estratégias de enfrentamento à situação de concorrência que os atletas apresentam. Foram avaliados o número de lesões nos últimos 12 meses, a auto-eficácia geral e as estratégias de enfrentamento de 245 atletas. A análise de regressão mostrou que duas estratégias de enfrentamento: calma emocional e tendência ao risco previu o sofrimento de um número menor ou maior de lesões, respectivamente. A path analysis mostrou que a auto-eficácia não influencia diretamente o número de lesionados, mas as estratégias de enfrentamento mediam essa relação. em contra as expectativas, uma maior auto-eficácia induz tanto estratégias levam a tentar novas alternativas e opções arriscadas (comportamentos de risco ) assim como outras que tentam controlar as emoções negativas (emotional calma) que, supostamente, estariam relacionados com comportamentos de menor risco. No primeiro caso a aumentar e no segundo diminuindo a vulnerabilidade a lesão

Self-efficacy and sports injuries: is this a risk or a protective factor?

The present paper analyses the effect of self-efficacy in sports injury and to what extent such effect is mediated by coping strategies to competitive situations shown by athletes. 245 sportspeople were assessed regarding the number of injuries suffered the last 12 months, General selfefficacy and coping strategies. regression analysis proved that two coping strategies, emotional calming and risk behavior, predicted the suffering of less or more injuries, respectively. A path analysis showed that self-efficacy was not directly related to the number of injuries but indirectly through coping strategies. Unexpectedly, the greater self-efficacy induces both coping strategies oriented to trying new options and risky alternatives (risk behavior) and coping strategies directed to control negative emotions (emotional calming) which would supposedly be related to least risk-taking behaviors, the former increasing and the later decreasing vulnerability to sports injuryEl presente estudio analiza el efecto de la autoeficacia en la lesión deportiva y en qué medida ese efecto se ve mediado por las estrategias de afrontamiento ante la situación competitiva que los deportistas exhiban. Se evaluaron el número de lesiones en los últimos 12 meses, la autoeficacia general y las estrategias de afrontamiento de 245 deportistas. Un análisis de regresión mostró que dos de las estrategias de afrontamiento: calma emocional y tendencia al riesgo, predecían el padecimiento de un menor o mayor número de lesiones, respectivamente. Un path analysis mostró que la autoeficacia no incidía directamente en el número de lesiones sino que las estrategias de afrontamiento mediaban esa relación. Contra lo esperado, una mayor autoeficacia induce tanto estrategias que llevan a intentar nuevas alternativas y opciones arriesgadas (conductas de riesgo) como otras que intentan controlar las emociones negativas (calma emocional) que, supuestamente, estarían relacionadas con menores conductas de riesgo. En el primer caso incrementando y en el segundo decrementando la vulnerabilidad a las lesionesO presente estudo analisa o efeito da autoeficacia na lesão esportiva e em que medida este efeito é mediado por estratégias de enfrentamento à situação de concorrência que os atletas apresentam. Foram avaliados o número de lesões nos últimos 12 meses, a auto-eficácia geral e as estratégias de enfrentamento de 245 atletas. A análise de regressão mostrou que duas estratégias de enfrentamento: calma emocional e tendência ao risco previu o sofrimento de um número menor ou maior de lesões, respectivamente. A path analysis mostrou que a auto-eficácia não influencia diretamente o número de lesionados, mas as estratégias de enfrentamento mediam essa relação. em contra as expectativas, uma maior auto-eficácia induz tanto estratégias levam a tentar novas alternativas e opções arriscadas (comportamentos de risco ) assim como outras que tentam controlar as emoções negativas (emotional calma) que, supostamente, estariam relacionados com comportamentos de menor risco. No primeiro caso a aumentar e no segundo diminuindo a vulnerabilidade a lesãoEste trabajo ha podido llevarse a cabo gracias al Proyecto del Plan Nacional de I+d+i concedido por el Ministerio de Ciencia e Innovación (actualmente Ministerio de Economía y Competitividad (MINeco ref: PSI2011-27000)

Impact response of advance combat helmet pad systems

Combat helmets are designed to protect against ballistic threats and fragments of explosive devices. There are numerous types of helmet comfort foams available. However, pad systems have not been evaluated in combat helmets to understand to what extent they mitigate head accelerations. In this work, different pad systems are studied to analyze the ballistic performance of combat helmets using a Hybrid III dummy equipped with longitudinal accelerometers at the head and a neck simulator. The tests are conducted with 9 mm Full Metal Jacket (FMJ) projectiles according to the performance requirements III-A of the NIJ 0106.01 standard. This experimental methodology allows the evaluation of brain and neck injuries. The thicker bicomponent polyurethane foams and the honeycomb configuration provided the best results in terms of mitigating brain damage due to accelerations applying different criteria (PLA, WSTC, HIC). However, it was concluded that there is no cervical injury or cranial fracture risk for any of the cases studied.The authors acknowledge the Ministry of Economy and Competitiveness of Spain and the FEDER program under Projects DPI2017-88166-R and PID2020-118946RB-I00 for the financial support of the work. M. Rodriguez-Millan acknowledges the Spanish Ministry of Universities, the National Program for the Promotion of Talent, and its Employability in Research and Development and Innovation (R&D&I), National Mobility Subprogram of the National Plan for Scientific and Technical Research and Innovation 2021–2023, for the professor’s mobility program (PRX21/00329). It has to thank the funding for APC: Universidad Carlos III de Madrid (Read and Publish Agreement CRUECSIC 2023).Publicad