Real-Time Salient Closed Boundary Tracking via Line Segments Perceptual Grouping

This paper presents a novel real-time method for tracking salient closed boundaries from video image sequences. This method operates on a set of straight line segments that are produced by line detection. The tracking scheme is coherently integrated into a perceptual grouping framework in which the visual tracking problem is tackled by identifying a subset of these line segments and connecting them sequentially to form a closed boundary with the largest saliency and a certain similarity to the previous one. Specifically, we define a new tracking criterion which combines a grouping cost and an area similarity constraint. The proposed criterion makes the resulting boundary tracking more robust to local minima. To achieve real-time tracking performance, we use Delaunay Triangulation to build a graph model with the detected line segments and then reduce the tracking problem to finding the optimal cycle in this graph. This is solved by our newly proposed closed boundary candidates searching algorithm called "Bidirectional Shortest Path (BDSP)". The efficiency and robustness of the proposed method are tested on real video sequences as well as during a robot arm pouring experiment.Comment: 7 pages, 8 figures, The 2017 IEEE/RSJ International Conference on Intelligent Robots and Systems (IROS 2017) submission ID 103

Design and set up of a pulverized panela machine

The panela is a food well known in the world for its benefits to humans since provides energy necessary and essential nutrients for the development of the body's metabolic processes. This is obtained from sugar cane, and a substance-free ingredient that can affect health. While, in culinary and gastronomic arts sector is used as a sweetener. The process of obtaining the panela is developed by successive and prolonged boiling, which causes moisture loss and then concentrates and forms a tiny mass that when cooled solidifies into blocks. The research work carried out focuses on the static and dynamic analysis of the designed parts that allow various processes (whipped, sifted, and dried) for large-scale panela production, analyzes the behavior under different loads (mechanical stress, displacement, and thermal study) based on Finite Element Analysis (FEA) using SolidWorks and Comsol Multiphysics software. Clearly, is important to mention that an appropriate size for the mesh was considered along with Von Mises criteria to be compared with the elastic limit of the selected material for the definition of the final prototype which was designed following the Pahl and Beitz design methodology respectively. A modal analysis of the panela pulverized machine was performed to verify natural process frequencies and vibration modes. Also, a friendly HMI interface for the user was implemented considering the characterization of the users (workers, farmers) and the nature of the process (artisanal).The start-up of the panela pulverizing machine showed a dependence on the consistency and origin of the molasses, depending on this the capacity and size of the pulverized panela

La investigación formativa en ciencias empresariales: .Experiencias de investigación formativa POLIPIF

El material propuesto en el libro resume gran parte de la calidad de los trabajos presentados y la evolución en el desarrollo de las capacidades de los estudiantes en un contexto actual, complejo y retador, que refleja la realidad de las organizaciones actuales sobre escenarios estratégicos y manejo de situaciones complejas, para que, cuando lleguen a ser empleados o emprendedores, sepan afrontar cada paso hacia el cambio

XVI International Congress of Control Electronics and Telecommunications: "Techno-scientific considerations for a post-pandemic world intensive in knowledge, innovation and sustainable local development"

Este título, sugestivo por los impactos durante la situación de la Covid 19 en el mundo, y que en Colombia lastimosamente han sido muy críticos, permiten asumir la obligada superación de tensiones sociales, políticas, y económicas; pero sobre todo científicas y tecnológicas. Inicialmente, esto supone la existencia de una capacidad de la sociedad colombiana por recuperar su estado inicial después de que haya cesado la perturbación a la que fue sometida por la catastrófica pandemia, y superar ese anterior estado de cosas ya que se encontraban -y aún se encuentran- muchos problemas locales mal resueltos, medianamente resueltos, y muchos sin resolver: es decir, habrá que rediseñar y fortalecer una probada resiliencia social existente - producto del prolongado conflicto social colombiano superado parcialmente por un proceso de paz exitoso - desde la tecnociencia local; como lo indicaba Markus Brunnermeier - economista alemán y catedrático de economía de la Universidad de Princeton- en su libro The Resilient Society…La cuestión no es preveerlo todo sino poder reaccionar…aprender a recuperarse rápido.This title, suggestive of the impacts during the Covid 19 situation in the world, and which have unfortunately been very critical in Colombia, allows us to assume the obligatory overcoming of social, political, and economic tensions; but above all scientific and technological. Initially, this supposes the existence of a capacity of Colombian society to recover its initial state after the disturbance to which it was subjected by the catastrophic pandemic has ceased, and to overcome that previous state of affairs since it was found -and still is find - many local problems poorly resolved, moderately resolved, and many unresolved: that is, an existing social resilience test will have to be redesigned and strengthened - product of the prolonged Colombian social conflict partially overcome by a successful peace process - from local technoscience; As Markus Brunnermeier - German economist and professor of economics at Princeton University - indicates in his book The Resilient Society...The question is not to foresee everything but to be able to react...learn to recover quickly.Bogot

Multi-messenger observations of a binary neutron star merger

On 2017 August 17 a binary neutron star coalescence candidate (later designated GW170817) with merger time 12:41:04 UTC was observed through gravitational waves by the Advanced LIGO and Advanced Virgo detectors. The Fermi Gamma-ray Burst Monitor independently detected a gamma-ray burst (GRB 170817A) with a time delay of ~1.7 s with respect to the merger time. From the gravitational-wave signal, the source was initially localized to a sky region of 31 deg2 at a luminosity distance of 40+8-8 Mpc and with component masses consistent with neutron stars. The component masses were later measured to be in the range 0.86 to 2.26 Mo. An extensive observing campaign was launched across the electromagnetic spectrum leading to the discovery of a bright optical transient (SSS17a, now with the IAU identification of AT 2017gfo) in NGC 4993 (at ~40 Mpc) less than 11 hours after the merger by the One- Meter, Two Hemisphere (1M2H) team using the 1 m Swope Telescope. The optical transient was independently detected by multiple teams within an hour. Subsequent observations targeted the object and its environment. Early ultraviolet observations revealed a blue transient that faded within 48 hours. Optical and infrared observations showed a redward evolution over ~10 days. Following early non-detections, X-ray and radio emission were discovered at the transient’s position ~9 and ~16 days, respectively, after the merger. Both the X-ray and radio emission likely arise from a physical process that is distinct from the one that generates the UV/optical/near-infrared emission. No ultra-high-energy gamma-rays and no neutrino candidates consistent with the source were found in follow-up searches. These observations support the hypothesis that GW170817 was produced by the merger of two neutron stars in NGC4993 followed by a short gamma-ray burst (GRB 170817A) and a kilonova/macronova powered by the radioactive decay of r-process nuclei synthesized in the ejecta

Pooled analysis of WHO Surgical Safety Checklist use and mortality after emergency laparotomy

Background The World Health Organization (WHO) Surgical Safety Checklist has fostered safe practice for 10 years, yet its place in emergency surgery has not been assessed on a global scale. The aim of this study was to evaluate reported checklist use in emergency settings and examine the relationship with perioperative mortality in patients who had emergency laparotomy. Methods In two multinational cohort studies, adults undergoing emergency laparotomy were compared with those having elective gastrointestinal surgery. Relationships between reported checklist use and mortality were determined using multivariable logistic regression and bootstrapped simulation. Results Of 12 296 patients included from 76 countries, 4843 underwent emergency laparotomy. After adjusting for patient and disease factors, checklist use before emergency laparotomy was more common in countries with a high Human Development Index (HDI) (2455 of 2741, 89.6 per cent) compared with that in countries with a middle (753 of 1242, 60.6 per cent; odds ratio (OR) 0.17, 95 per cent c.i. 0.14 to 0.21, P <0001) or low (363 of 860, 422 per cent; OR 008, 007 to 010, P <0.001) HDI. Checklist use was less common in elective surgery than for emergency laparotomy in high-HDI countries (risk difference -94 (95 per cent c.i. -11.9 to -6.9) per cent; P <0001), but the relationship was reversed in low-HDI countries (+121 (+7.0 to +173) per cent; P <0001). In multivariable models, checklist use was associated with a lower 30-day perioperative mortality (OR 0.60, 0.50 to 073; P <0.001). The greatest absolute benefit was seen for emergency surgery in low- and middle-HDI countries. Conclusion Checklist use in emergency laparotomy was associated with a significantly lower perioperative mortality rate. Checklist use in low-HDI countries was half that in high-HDI countries.Peer reviewe

Reflexividad, interseccionalidad y decolonialidad en las películas etnográficas del colectivo Pasolini en Medellín sobre la diáspora negra

This article explores the archive of the Pasolini Collective in Medellín, Pem ―organisation of collaborative research and creation processes with marginal communities―, on the black diaspora and exposes how the violence reconstructed in these ethnographic fictions can be made visible and analyzed in an intersectional way to see inseparable condition of different forms of oppression. Although these films ope-rate as devices of empowerment and emancipation through which the participants can to objectify the violence they resist, this quality is enhanced in exhibition settings where discursive analyzes allow recipients to continue the task of decolonizing life. daily and thoughtEste artigo explora o arquivo do Coletivo Pasolini em Medellín, Pem―organização de pesquisa colaborativa e processos de criação com comunidades marginais―, sobre a diáspora negra e expõe como a violência reconstruída nessas ficções etnográficas pode ser tornada visível e analisada de forma interseccional para ver o que insepará-vel de diferentes formas de opressão. Embora esses filmes funcionem como dispositivos de empoderamento e emancipação por meio dos quais os participantes conseguem objetivar a violência a que resis-tem, essa qualidade é potencializada em cenários expositivos em que as análises discursivas permitem aos destinatários dar continuidade à tarefa de descolonizar a vida. diariamente e pensamentoEste artículo explora el archivo del Colectivo Pasolini en Medellín, Pem―artífice de procesos colaborativos de investigación y creación con comunidades marginales―, sobre la diáspora negra y expone cómo las violencias reconstruidas en estas ficciones etnográficas pueden visibilizarse y analizarse de forma interseccional para ver lo inescin-dible de distintas formas de opresión. Si bien estas películas operan como dispositivos de empoderamiento y emancipación a través de las cuales los participantes logran objetivar las violencias a las que resis-ten, esta cualidad se potencia en escenarios de exhibición donde los análisis discursivos permiten a los receptores continuar la tarea de descolonizar la vida diaria y el pensamient