Time filter

Source Type

Becerra O.G.,University of San Buenaventura | Granada E.J.C.,University of Valle
Advanced Materials Letters | Year: 2016

The frequencies of optical modes of vibration in a metamaterial slab, contacting with vacuum, are investigated when the slab dielectric permittivity and the magnetic permeability show resonant behavior. Retardation effects are included in the no radiative zone. On the basis of the linear response theory, we calculate the components of the electromagnetic Green propagator. The dispersion curves and the corresponding power spectra are determined from the poles and the imaginary part of these components. Two sets of surface polaritonic frequencies are found for transversal electric TE- and transversal magnetic TM surface modes, corresponding to bonding and antibonding oscillations of the electric and magnetic fields at the slab surfaces. It is shown that for all the range of values in the relation between the resonance frequency of magnetic permeability and the resonance frequency of the dielectric permittivity there is one TE and one TM backward mode with negative group velocities. This parameter relation determines if the frequency range of TM modes can be separated from the corresponding interval for TE modes. Present work can be extended to consider waves in photonic crystals containing anisotropic slabs with resonant behavior in the optical properties, which can be useful to design omnidirectional optical filters. ©2016 VBRI Press.

Arrivillaga M.,Pontifical Xavierian University | Salcedo J.P.,University of San Buenaventura
AIDS Education and Prevention | Year: 2014

The aim of this study is to describe the scope of microfinance-based interventions for HIV/AIDS prevention. A systematic review was carried out of literature published between 1986 and 2012 from EBSCO, ProQuest, Science Direct, Emerald, and JSTOR. The search included original research articles that presented evaluated interventions. Books, dissertations, gray literature, and theoretical reviews were excluded. Findings revealed a total of fourteen studies focused on the evaluation of: the IMAGE project, female sex workers, life skills and risk behavior reduction, adherence to treatment, and children and their families. Most of these interventions have shown to have beneficial effects, although results depend on: the type of program, monitoring, sustainability of microcredits, and contextual conditions. The findings of this review should be complemented with interventions carried out by various NGOs and microfinance institutions in different countries that present their results in a dissimilar way. © 2014 The Guilford Press.

Vallejo Jimenez G.A.,University of San Buenaventura
Revista Colombiana de Anestesiologia | Year: 2015

Introducción: Metodología: Resultados: Conclusiones: Introduction: One of the parameters used when analysing the occurrence of an offence of negligence is the so-called ideal average individual scale. Thus, in order to determine whether medical negligence has occurred, the criteria that apply to the average ideal practitioner are generally used. Nonetheless, there are situations in which healthcare professionals have abilities that are superior to those of the average ideal practitioner. This essay reflects on whether these superior individual qualities should be taken into account when analysing these situations, and asks whether it is possible for a physician to be held criminally liable for negligence (in cases where harm to the life or health of the patient occurs) when he or she is not using those superior individual skills but is simply acting as any other healthcare professional. Methodology: The methodology used for this research project was the criminal dogmatic perspective, that is, a search of what criminal law has to say regarding the proposed problem, always looking to respect the principle of legality. Also, the methodological path followed throughout this research consisted mainly of three moments: an exploratory phase, a focusing phase and a concretion phase. As for the sources used, 80% of them come from the Spanish doctrine, it having dealt widely with the study of the issue at hand, and the remaining 20% consists of German work translated into Spanish, plus some limited work conducted in Colombia specifically regarding this subject in particular. Results: There are three theories that aim to answer the aforementioned question, all of which will be analysed in this essay, namely: the individualizing theory, the objective theory, and the intermediate or complementary theory. © 2015 Sociedad Colombiana de Anestesiología y Reanimación.

The purpose of this research was to evaluate the relationship of the resilience, illness perception, beliefs and spiritual-religious coping on health-related quality of life in 40 patients with chronic obstructive pulmonary disease diagnosis from the city of Medellín, Colombia. Instruments: resilience scale RS, the connor-davidson resilience Scale CD-RISC2, the brief illness perception questionnaire IPQ-B, systems of beliefs inventory SBI-15R, spiritual coping scale SCS, medical outcomes study short form 36 ítems MOS SF-36. To level results there were positive correlations between resilience and mental health and multiple linear regression analysis personal control and consequences of illness perception had significant weight on the summary mental index of the quality of life. In conclusion, the mental health in sharp crises meets altered by the worry in the physical, social, economic and emotional consequences that it brings the disease and personal control and resilience are variables that promote the emotional regulation in patients with COPD. © 2011 Sociedad Chilena de Psicología Clínica.

Andrade A.,University of San Buenaventura
International Journal of Technology and Design Education | Year: 2011

As we have noticed from our own classroom experiences, children often find it difficult to identify the adequate operations learned in mathematics class when they are solving mechanical-operators problems in Technology class. We wanted to design a project that exploits the idea of a hands-on relationship between mathematics and technology to teach students the concept of 'transmission coefficient' in schools. Our purpose was to bridge mathematical knowledge and mechanical parts in technological devices. Our belief was that visual-tangible representations enhance human cognition by scaffolding the information process. We supplied a kit with rubber foam (Fomi) and balsa wood parts to construct an analogical clock. This included a series of gears to work with three different ratios. The project was conducted in 2007 and 2008, with 38 students ranging from 10 to 14 years of age. The students were from the 5th and 7th grades in two different schools. The project included six stages of both theory and hands-on work. In a final stage, the students were given a written test. All students were able to make workable systems of their design for a time-measuring device. This proved important for technological education. On the other hand, manipulating gears along with visual reasoning strategies allowed all students to achieve an understanding of operations with fractions. We think this is a major achievement in mathematical education. © 2009 Springer Science+Business Media B.V.

Quiceno J.M.,University of San Buenaventura | Vinaccia S.,University of San Buenaventura
Terapia Psicologica | Year: 2013

This study had with aim to evaluate the relationship of positive orientation towards the future of resilience, happiness and suicidal ideation on the health-related quality of life in 291 adolescents from public schools in Bogotá, Colombia. Design: correlational ex post facto cross. Instruments: positive dimension to the future orientation of the resilience scale ARS, the Positive and Negative Suicidal Ideation Inventory PANSI, item of happiness, and KIDSCREEN-52. The multiple linear regression analysis showed that the positive orientation toward the future, positive ideas towards life and happiness had a significant weight on the psychological and relationship of parent-related quality of life. Conclusion, adolescents who have clear goals about their future, are happier and give you more value and meaning to life perceived better psychological well-being and relationship with parents. © 2013 by Sociedad Chilena de Psicología clínica.

Benavides G.M.,University of San Buenaventura
2016 8th Euro American Conference on Telematics and Information Systems, EATIS 2016 | Year: 2016

Structural Health Monitoring (SHM) systems using Wireless Sensor Networks (WSNs) are common nowadays in infrastructure such as tunnels, buildings and highways. Information gathered from in-situ deployed sensors is useful for maintenance purposes, evaluating infrastructure response before particular situations and preventing catastrophic events, among others. The design and implementation of a wireless sensor network for monitoring infrastructure adjacent to Metro de Medellín railway system is presented. A wireless network constituted by a set of nodes involving 8-bit microcontrollers uses the IEEE 802.15.4-compliant MiWi Protocol for communications within the Personal Area Range. Measurement data can be retransmitted over longer distances, within the local area or metropolitan area range, through communication gateways connected to network coordinator. © 2016 IEEE.

Cabezas I.,University of San Buenaventura
Proceedings - Frontiers in Education Conference, FIE | Year: 2015

The main contribution of this paper is the introduction of a continuous improvement cycle for devising teaching scenarios and conducting learning experiences in engineering. The proposed cycle consists of seven steps on which gamification theory and ABET criteria are combined. It arose from the adaptation of a gamification design framework, commonly used in industry, into the specific context of high quality education in engineering. It is formulated at high level. Consequently, it should be useful for practitioners having different requirements and expectations. A developed practice, following the proposed cycle, is presented, discussed and evaluated. In particular, the proposal is applied and exemplified, in a scenario for teaching introductory concepts of computer programming in a first-year course. A digital game was used within a gamified learning experience, as a teaching tool. However, the learning process does not rely solely on the use of the game by itself. Moreover, the devised scenario has a purpose beyond edutainment: contributing to achievement of student outcomes, under a continuous improvement approach, according to ABET. A quantitative and qualitative evaluation of the developed practice was performed. A positive impact on students' emotional engagement and behavior was observed as a result of the evaluation process. © 2015 IEEE.

For any product, it is well known that the quality determines the purchase decision, but for the food industry, this becomes a critical factor that determines the entire production chain, from development to display at a point of sale. From this perspective, through history it has extensively researched the effect exerted by different treatments of preservation and transformation on the overall quality of food products. However, understanding the concept of overall quality that is known by consumers transcends the chemical, microbiological and nutritional qualities, it is also necessary to consider the importance of the organoleptic characteristics of food products. In the specific case of foods of agricultural origin, a common objective is to obtain high quality products with a long shelf life, higher added value and with the least disturbance to their nutritional properties. This approach itself becomes a challenge for the development of technologies that can satisfy these requirements; however, when small farmers are involved as key actors in the agroindustrial chain, the challenge becomes bigger, it is necessary to propose technological alternatives in addition to what has already been described, are simple, relatively inexpensive and easy to implement. While it is important to ensure the overall quality of food products, for small producers it is essential in getting your product attractive, so the sensory characteristics must become one of the focuses of interest. Thus, once the technologies that contribute to produce a nutritive food that is chemically and microbiologically stable, serve properties such as color could give it a significant advantage in the market, causing it to configure as your greatest ally and more spoiled attribute. In this paper, I will briefly discuss about some processing and preservation technologies that affect the physicochemical properties of food products, specially color, and could be implemented by small producers to expand their market share of products with higher added value. © 2016, Universidad de Antioquia. All rights reserved.

This article addresses some important questions in psychiatric semiology. The concept of a sign is crucial in psychiatry. How do signs emerge, and what gives them validity and legitimacy? What are the boundaries of ‘normal’ and ‘pathological’ behaviour and mental experiences? To address these issues, we analyse the characteristics and rules that govern semiological signs and clinical elements. We examine ‘normality’ from the perspective of Georges Canguilehm and compare the differences of ‘normal’ in physiology and psychiatry. We then examine the history and the philosophical, linguistic and medical-psychiatric origins of semiology during the eighteenth and nineteenth centuries (the Age of Revolution). The field of rhetoric and oratory has emphasized the importance of passions, emotions and language as applied to signs of madness. Another perspective on semiology, provided by Michel Foucault, lays stress on the concept of ‘instinct’ and the axis of voluntary-involuntary behaviour. Finally, we analyse how statistics and eugenics have played an important role in our current conceptualization of the norm and therefore the scientific discourse behind the established clinical signs. © 2016, © The Author(s) 2016.

Loading University of San Buenaventura collaborators
Loading University of San Buenaventura collaborators