Visual communication in practice: A texto-material approach to WhatsApp in Mexico City

With more than 2 billion users, WhatsApp is one of the most important mobile technologies in the world. Accordingly, scholarly interest in WhatsApp has grown in recent years. However, studies have tended to separate WhatsApp’s visual and textual elements from the analysis of its technological infrastructure. Alternatively, we argue for a “texto- material” approach that examines the links between both dimensions. We elaborate on the analytical gains that come from this approach by examining the use of WhatsApp in Mexico City. We posit that considering how textual/visual elements and technological features are interwoven is crucial for understanding the cultural specificity of WhatsApp’s development and use in places like Latin America.UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Sociales::Centro de Investigación en Comunicación (CICOM

Alineación de los planes de área colombianos a los estándares básicos de competencia de matemáticas

En este artículo estudiamos en qué medida los planes de área de matemáticas de la educación media colombiana se alinean con los estándares básicos de competencia en matemáticas (Ministerio de Educación Nacional, 2006). Se describe qué significado daremos al término alineación de un plan de área con los estándares y se explica cómo se aplica esta idea a cada plan de área. Bajo un planteamiento cuantitativo, se calculó la alineación de 206 planes de área, estratificados por área geográfica, tipo de institución y modalidad académica. Mediante técnicas de estimación y contraste de hipótesis se establece la alineación de los planes de área colombianos con los estándares. Encontramos que esta alineación es reducida con una dispersión importante, y que no hay diferencias significativas en la alineación de los planes de área de los diferentes tipos de colegios

Towards a Popular Theory of Algorithms

This paper establishes dialogues between theories on the popular and critical studies on algorithms and datafication. In doing so, it contributes to reversing the analytical tendency to assume that algorithms have universal effects and that conclusions about “algorithmic power” in the Global North apply unproblematically everywhere else. We begin by clarifying how Latin American scholars and other research traditions have theorized the popular (“lo popular”). We then develop four dimensions of lo popular to implement these ideas in the case of algorithms: playful cultural practices, imagination, resistance, and “in-betweenness.” We argue that this dialogue can generate different ways of thinking about the problems inherent to algorithmic mediation by drawing attention to the remixes of cultural practices, imaginative solutions to everyday problems, “cyborg” forms of resistance, and ambiguous forms of agency that are central to the operations of algorithmic assemblages nowadays.UCR::Vicerrectoría de Investigación::Unidades de Investigación::Ciencias Sociales::Centro de Investigación en Comunicación (CICOM

Generation of H₂ on Board Lng Vessels for Consumption in the Propulsion System

[Abstract] At present, LNG vessels without reliquefaction plants consume the BOG (boil-off gas) in their engines and the excess is burned in the gas combustion unit without recovering any of its energy content. Excess BOG energy could be captured to produce H₂, a fuel with high energy density and zero emissions, through the installation of a reforming plant. Such H₂ production would, in turn, require on-board storage for its subsequent consumption in the propulsion plant when navigating in areas with stringent anti-pollution regulations, thus reducing CO₂ and SOₓ emissions. This paper presents a review of the different H₂ storage systems and the methods of burning it in propulsion engines, to demonstrate the energetic viability thereof on board LNG vessels. Following the analysis, it is identified that a pressurised and cooled H₂ storage system is the best suited to an LNG vessel due to its simplicity and the fact that it does not pose a safety hazard. There are a number of methods for consuming the H₂ generated in the DF engines that comprise the propulsión plant, but the use of a mixture of 70% CH₄-30% H₂ is the most suitable as it does not require any modifications to the injection system. Installation of an on-board reforming plant and H₂ storage system generates sufficient H₂ to allow for almost 3 days’ autonomy with a mixture of 70%CH₄-30%H₂. This reduces the engine consumption of CH₄ by 11.38%,thus demonstrating that the system is not only energy-efficient, but lends greater versatility to the vessel

Changing the paradigm: endoscopic video analysis and information extraction for safer surgeries

Background: Minimally invasive surgery creates two technological opportunities: (1) the development of better training and objective evaluation environments, and (2) the creation of image guided surgical systems

Utilidad del vídeo quirúrgico en las cirugías de mínima invasión

El vídeo quirúrgico es la principal fuente de información intraoperatoria para el seguimiento de la intervención quirúrgica. Actualmente, su uso como medio de análisis no se halla implantado. Este trabajo presenta su utilidad con casos de uso reales que explotan la información presente en los vídeos a través del procesamiento de los vídeos. Los algoritmos desarrollados permiten la segmentación y seguimiento de los elementos de la escena, la reconstrucción y la localización espacial de los trócares. Se presenta a modo de ejemplos un entorno de formación y un sistema de navegación quirúrgica que explotan la información presente en los vídeos captados por el endoscopio

Minimally invasive surgical video analysis: a powerful tool for surgical training and navigation

Analysis of minimally invasive surgical videos is a powerful tool to drive new solutions for achieving reproducible training programs, objective and transparent assessment systems and navigation tools to assist surgeons and improve patient safety. This paper presents how video analysis contributes to the development of new cognitive and motor training and assessment programs as well as new paradigms for image-guided surgery

TELMA: technology enhanced learning environment for Minimally Invasive Surgery

One of the most important revolutions in the past few decades in clinical practice has been motivated by the introduction of Minimally Invasive Surgery (MIS) techniques, which have spread amongst almost all surgical specialities. MIS training is a principal component of the education of new surgical residents, with an increasing demand for knowledge and skills for medical students and surgeons. Technology enhanced learning (TEL) solutions can deal with the growing need for MIS learning. This research work aims to develop a MIS learning environment based on web technologies, named TELMA, which will respond to the growing amount of information and multimedia surgical contents available (mainly intervention’s video recording libraries), in compliance with specific learning needs of surgical students and professionals, enhancing their competence on MIS cognitive skills. Furthermore, TELMA will support knowledge capturing, sharing and reuse, and effective management of didactic contents through personalised and collaborative services

Minimally invasive surgical video analysis: a powerful tool for surgical training and navigation

Analysis of minimally invasive surgical videos is a powerful tool to drive new solutions for achieving reproducible training programs, objective and transparent assessment systems and navigation tools to assist surgeons and improve patient safety. This paper presents how video analysis contributes to the development of new cognitive and motor training and assessment programs as well as new paradigms for image-guided surgery