20 results on '"Olmos A"'
Search Results
2. The Bridge Is Broken, How Will We Repair It? The Articulation of the Media and Teaching in Public Education Institutions
- Author
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Olmos Pérez, Marelbi
- Abstract
This qualitative research was carried out from the socio-critical paradigm with the approach of the Participatory Action Research (IAP), to point out the production of a propositional and transformative knowledge, which start from the reality of the school context, compare with the rethinking about Educommunication, in which students, teachers and parents of the public education institutions of Cartagena participate (IE). It seeks to reflect critically and reflexively about the problematic relationship between communication and education to begin to move through where the school and the media overlap. This research analyzed the perceptions that 1479 students had between 2017 and 2018 about their school and the environment around it that is generally difficult because causes such as drugs addictions, violence and other social problems. As well as the social, symbolic and imaginary representations that the students have and that are reinforced by the contents that they see through the different ways of communication. This research integrates and articulates the work of educators, with social communicators, because it is based on the premise that the teaching of media in schools is a key element for the formation of students, but these workshops are not intended to impose ways of reading the media, it pursues that student read other narratives of their environment and their links through the tecnopedagogy, so that they can achieve a re-signification of their context and make their role visible, other ways of being young and the relationship that they build with others in their educational space and environment.
- Published
- 2019
3. Detection of Coastal Erosion and Progradation in the Colombian 'Atrato River' Delta by Using Sentinel-1 Synthetic Aperture Radar Data.
- Author
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Vásquez-Salazar, Rubén Darío, Cardona-Mesa, Ahmed Alejandro, Valdés-Quintero, Juan, Olmos-Severiche, César, Gómez, Luis, Travieso-González, Carlos M., Díaz-Paz, Jean Pierre, Espinosa-Ovideo, Jorge Ernesto, Diez-Rendón, Lorena, Garavito-González, Andrés F., and Vásquez-Cano, Esteban
- Subjects
SYNTHETIC aperture radar ,SYNTHETIC apertures ,SOIL erosion ,COASTAL changes ,EROSION ,OPTICAL images ,DEEP learning ,ECOSYSTEM services - Abstract
This paper presents a methodology to detect the coastal erosion and progradation effects in the 'Atrato River' delta, located in the Gulf of Urabá in Colombia, using SAR (Synthetic Aperture Radar) images. Erosion is the physical–mechanical loss of the soil that affects its functions and ecosystem services while producing a reduction in its productive capacity. Progradation is the deposition of layers in the basinward direction while moving coastward. Other studies have investigated these two phenomena using optical images, encountering difficulties due to the persistent presence of clouds in this region. In order to avoid the cloud effects, in this study, we used 16 Sentinel 1 SAR images with two different polarizations between 2016 and 2023. First, each image was rescaled from 0 to 255, then the image was despeckled by a deep learning (DL) model. Afterwards, a single RGB image was composed with the filtered polarizations. Next, a classifier with 99% accuracy based on Otsu's method was used to determine whether each pixel was water or not. Then, the classified image was registered to a reference one using Oriented FAST and Rotated BRIEF (ORB) descriptor. Finally, a multitemporal analysis was performed by comparing every image to the previous one to identify the studied phenomena, calculating areas. Also, all images were integrated to obtain a heatmap that showed the overall changes across eight years (2016–2023) in a single image. The multitemporal analysis performed found that the newly created mouth is the most active area for these processes, coinciding with other studies. In addition, a comparison of these findings with the Oceanic Niño Index (ONI) showed a relative delayed coupling to the erosion process and a coupling of progradation with dry and wet seasons. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
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4. Determinación de los factores asociados con el reingreso temprano de pacientes con enfermedad mental en dos ciudades de Colombia durante 2018.
- Author
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Pinzón Olmos, Manuel Alejandro, Cortés Duque, Carolina, Pinzón Olmos, Tania, and Arias Duarte, Rafael
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PATIENT readmissions ,PEOPLE with mental illness ,AFFECTIVE disorders ,MENTAL health ,BIPOLAR disorder ,MENTAL illness ,SCHIZOAFFECTIVE disorders - Abstract
Copyright of Revista Colombiana de Psiquiatria is the property of Asociacion Colombiana de Psiquiatria and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
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5. RESILIENCE AND DIGITAL COMPETENCES IN HIGHER EDUCATION STUDENTS.
- Author
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JAIMES DELGADO, PEDRO EMILIO, PÉREZ OLMOS, LILIANA MARGARITA, CELIS SALAZAR, ORLANDO, and RAMÍREZ PABÓN, LILIANA
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CORE competencies ,HIGHER education ,DIGITAL technology ,STUDENT attitudes ,SOCIAL reality ,EDUCATION students ,HIGHER education research ,UNIVERSITIES & colleges - Abstract
Copyright of Human Review is the property of Eagora Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
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- View/download PDF
6. Clinical and Descriptive Study of Orofacial Clefts in Colombia: 2069 Patients From Operation Smile Foundation.
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Espinosa, Alejandro Silva, Martinez, Julio Cesar, Molina, Yubahhaline, Gordillo, María Alejandra Bermúdez, Hernández, Daniel Ramos, Rivera, Daniela Zárate, Olmos, Blanka Pacheco, Ramírez, Nathaly, Arias, Liliana, Zarate, Andres, Diana Marcela Diaz, Q., Collins, Andrew, Cepeda, Álvaro Mauricio Herrera, and Balcazar, Ignacio Briceño
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RESEARCH methodology ,CLEFT palate ,RETROSPECTIVE studies ,CLEFT lip ,SOCIOECONOMIC factors ,DEMOGRAPHIC characteristics ,PSYCHOMOTOR disorders ,PHENOTYPES ,HEART diseases - Abstract
Objective: To describe the population of patients with cleft lip and/or palate (CL/P) in terms of cleft phenotypes, gender, age, ethnic group, family history, clinical presentation (syndromic vs nonsyndromic), some environmental and behavioral factors, and some clinical features. Design: Descriptive retrospective study. Setting: Patients attending the genetics counseling practice in Operation Smile Foundation, Bogotá, Colombia, for over 8 years. Participants: No screening was conducted. All patients requiring clinical genetics assessment in Operation Smile Foundation were included in the study. Results: Left cleft lip and palate (CLP) and nonsyndromic forms were the most frequent types of malformations in this population. Psychomotor retardation and heart disease were the most frequent comorbidities in these patients. A low proportion of mothers exposed to passive smoking during pregnancy was observed and low birth weight accounted for an important number of cases. Aarskog, velocardiofacial, and orofaciodigital syndromes were the most frequent syndromic forms of CLP in this population. Conclusions: In this study, the most frequent type of CL/P was the nonsyndromic complete left CLP. Aarskog, velocardiofacial, and orofaciodigital syndromes were the most frequent syndromic forms of CL/P in this population. [ABSTRACT FROM AUTHOR]
- Published
- 2022
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7. Mortality and clinical characteristics of multisystem inflammatory syndrome in children (MIS-C) associated with covid-19 in critically ill patients: an observational multicenter study (MISCO study).
- Author
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Acevedo, Lorena, Piñeres-Olave, Byron Enrique, Niño-Serna, Laura Fernanda, Vega, Liliana Mazzillo, Gomez, Ivan Jose Ardila, Chacón, Shayl, Jaramillo-Bustamante, Juan Camilo, Mulett-Hoyos, Hernando, González-Pardo, Otto, Zemanate, Eliana, Izquierdo, Ledys, Mejìa, Jaime Piracoca, González, Jose Luis Junco, Duran, Beatriz Giraldo, Gonzalez, Carolina Bonilla, Preciado, Helen, Marun, Rafael Orozco, Alvarez-Olmos, Martha I, Alzate, Carolina Giraldo, and Rojas, Jorge
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MULTISYSTEM inflammatory syndrome in children ,CRITICALLY ill children ,COVID-19 ,SYMPTOMS ,CRITICALLY ill ,PERICARDIAL effusion - Abstract
Background: The clinical presentation and severity of Multisystem Inflammatory Syndrome in Children associated with COVID-19 (MIS-C) is widespread and presents a very low mortality rate in high-income countries. This research describes the clinical characteristics of MIS-C in critically ill children in middle-income countries and the factors associated with the rate of mortality and patients with critical outcomes.Methods: An observational cohort study was conducted in 14 pediatric intensive care units (PICUs) in Colombia between April 01, 2020, and January 31, 2021. Patient age ranged between one month and 18 years, and each patient met the requirements set forth by the World Health Organization (WHO) for MIS-C.Results: There were seventy-eight children in this study. The median age was seven years (IQR 1-11), 18 % (14/78) were under one year old, and 56 % were male. 35 % of patients (29/78) were obese or overweight. The PICU stay per individual was six days (IQR 4-7), and 100 % had a fever upon arrival to the clinic lasting at least five days (IQR 3.7-6). 70 % (55/78) of patients had diarrhea, and 87 % (68/78) had shock or systolic myocardial dysfunction (78 %). Coronary aneurysms were found in 35 % (27/78) of cases, and pericardial effusion was found in 36 %. When compared to existing data in high-income countries, there was a higher mortality rate observed (9 % vs. 1.8 %; p=0.001). When assessing the group of patients that did not survive, a higher frequency of ferritin levels was found, above 500 ngr/mL (100 % vs. 45 %; p=0.012), as well as more cardiovascular complications (100 % vs. 54 %; p = 0.019) when compared to the group that survived. The main treatments received were immunoglobulin (91 %), vasoactive support (76 %), steroids (70.5 %) and antiplatelets (44 %).Conclusions: Multisystem Inflammatory Syndrome in Children due to SARS-CoV-2 in critically ill children living in a middle-income country has some clinical, laboratory, and echocardiographic characteristics similar to those described in high-income countries. The observed inflammatory response and cardiovascular involvement were conditions that, added to the later presentation, may explain the higher mortality seen in these children. [ABSTRACT FROM AUTHOR]- Published
- 2021
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8. A light of hope? Inequalities in mental health before and after the peace agreement in Colombia: a decomposition analysis.
- Author
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León-Giraldo, Sebastián, Casas, Germán, Cuervo-Sánchez, Juan Sebastián, González-Uribe, Catalina, Olmos, Antonio, Kreif, Noemi, Suhrcke, Marc, Bernal, Oscar, and Moreno-Serra, Rodrigo
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MENTAL health ,NEGOTIATION ,SOCIOECONOMIC factors ,HEALTH & social status - Abstract
Background: The present study seeks to evaluate the change in mental health inequalities in the department of Meta after the signing of Colombia's Peace Agreement in 2016 with the FARC guerrilla group. Using a validated survey instrument composed of 20 questions ('SRQ-20'), we measure changes in mental health inequalities from 2014, before the signing of the agreement, to 2018, after the signing. We then decompose the changes in inequalities to establish which socioeconomic factors explain differences in mental health inequalities over time. Methods: Our study uses information from the Conflicto, Salud y Paz (CONPAS) survey conducted in the department of Meta, Colombia, in 1309 households in 2018, with retrospective information for 2014. To measure inequalities, we calculate the concentration indices for both years. Through the Oaxaca change decomposition method, we disaggregate changes in mental health inequalities into its underlying factors. This method allows us to explain the relationship between changes in mental health inequalities and changes in inequalities in several sociodemographic factors. It also identifies the extent to which these factors help explain the changes in mental health inequalities. Results: Mental health inequalities in Meta were reduced almost by half from 2014 to 2018. In 2018, the population at the lower and middle socioeconomic levels had fewer chances of experiencing mental health disorders in comparison to 2014. The reduction in mental health differences is mostly attributed to reductions in the influence of certain sociodemographic variables, such as residence in rural zones and conflict-affected territories, working in the informal sector, or experiencing internal displacement. However, even though mental health inequalities have diminished, overall mental health outcomes have worsened in these years. Conclusions: The reduction in the contribution of conflict-related variables for explaining mental health inequalities could mean that the negative consequences of conflict on mental health have started to diminish in the short run after the peace agreement. Nevertheless, conflict and the presence of other socioeconomic inequalities still contribute to persistent adverse mental health outcomes in the overall population. Thus, public policy should be oriented towards improving mental health care services in these territories, given the post-accord context. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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9. HACIA UNA CARACTERIZACIÓN DE LOS TRADUCTORES E INTÉRPRETES EN COLOMBIA.
- Author
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Giraldo-Ortiz, John Jairo, Clavijo-Olmos, Sandra Bibiana, Malavert-Chávez, Constanza, Salazar-Giraldo, Bibiana, and Sarmiento-Jaramillo, Camilo
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TRANSLATING & interpreting ,QUALITY assurance standards ,FOREIGN language education ,PROFESSIONAL associations ,PROFESSIONALIZATION ,TRANSLATORS - Abstract
Copyright of Íkala: Revista de Lenguaje y Cultura is the property of Universidad de Antioquia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
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10. Unravelling residents’ and supervisors’ workplace interactions: an intersubjectivity study.
- Author
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Olmos‐Vega, Francisco M., Dolmans, Diana H. J. M., Guzmán‐Quintero, Carlos, Stalmeijer, Renée E., and Teunissen, Pim W.
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ANESTHESIOLOGY , *LEGAL compliance , *CONCEPTUAL structures , *EXPERIENTIAL learning , *FOCUS groups , *GROUNDED theory , *HOSPITAL medical staff , *INTERPERSONAL relations , *MEDICAL care , *MEDICAL education , *PATIENTS , *PROFESSIONS , *SCHOOL environment , *SUPERVISION of employees , *WORK , *WORK environment , *TEAMS in the workplace , *FIELD research , *OCCUPATIONAL adaptation - Abstract
Context: Successful engagement between residents and supervisors lies at the core of workplace learning, a process that is not exempt from challenge. Clinical encounters have unique learning potential as they offer opportunities to achieve a shared understanding between the resident and supervisor of how to accomplish a common goal. How residents and supervisors develop such a mutual understanding is an issue that has received limited attention in the literature. We used the ‘intersubjectivity’ concept as a novel conceptual framework to analyse this issue. Methods: We conducted a constructivist grounded theory study in an anaesthesiology department in Bogota, Colombia, using focus groups and field observations. Eleven residents of different training levels and 18 supervisors with varying years of teaching experience participated in the study. Through iterative data analysis, collection and constant comparison, we constructed the final results. Results: We found that residents and supervisors achieved a shared understanding by adapting to one another in the process of providing patient care. Continuous changes in the composition of resident–supervisor dyads exposed them to many procedural variations, to which they responded by engaging in various adaptation patterns that included compliance by residents with supervisors’ directions, negotiation by residents of supervisors’ preferences, and the sharing of decision making. In the process, the resident played an increasingly key role as a member of the supervisory dyad. Additionally, experiencing these adaptation patterns repeatedly resulted in the creation of a working repertoire: an attuned working code used by the members of each supervisory dyad to work together as a team. Conclusions: The development of shared understanding between residents and supervisors entailed experiencing diverse adaptation patterns which resulted in the creation of working repertoires. Seeing supervisory interactions as adaptation processes has essential theoretical and practical implications regarding workplace learning in postgraduate settings. Our findings call for further exploration to understand learning in postgraduate education as a social process. [ABSTRACT FROM AUTHOR]
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- 2018
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11. Understanding how residents' preferences for supervisory methods change throughout residency training: a mixed-methods study.
- Author
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Olmos-Vega, Francisco, Dolmans, Diana, Donkers, Jeroen, and Stalmeijer, Renée E.
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PATIENT safety ,COGNITIVE apprenticeship ,MEDICAL education ,UNIVERSITIES & colleges ,CLINICAL supervision (Education) - Abstract
Background: A major challenge for clinical supervisors is to encourage their residents to be independent without jeopardising patient safety. Residents' preferences according to level of training on this regard have not been completely explored. This study has sought to investigate which teaching methods of the Cognitive Apprenticeship (CA) model junior, intermediate and senior residents preferred and why, and how these preferences differed between groups. Methods: We invited 301 residents of all residency programmes of Javeriana University, Bogotá, Colombia, to participate. Each resident was asked to complete a Maastricht Clinical Teaching Questionnaire (MCTQ), which, being based on the teaching methods of CA, asked residents to rate the importance to their learning of each teaching method and to indicate which of these they preferred the most and why. Results: A total of 215 residents (71%) completed the questionnaire. All concurred that all CA teaching methods were important or very important to their learning, regardless of their level of training. However, the reasons for their preferences clearly differed between groups: junior and intermediate residents preferred teaching methods that were more supervisor-directed, such as modelling and coaching, whereas senior residents preferred teaching methods that were more resident-directed, such as exploration and articulation. Conclusions: The results indicate that clinical supervision (CS) should accommodate to residents' varying degrees of development by attuning the configuration of CA teaching methods to each level of residency training. This configuration should initially vest more power in the supervisor, and gradually let the resident take charge, without ever discontinuing CS. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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12. CARBON FIXING CAPACITY OF AMAZONIAN SOILS IN RELATION TO ITS DEGRADATION CONDITIONS.
- Author
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RODRÍGUEZ LEÓN, CARLOS HERNANDO, BETANCURT PARRA, BERNARDO EUSEBIO, PEÑA VENEGAS, CLARA PATRICIA, CARDONA VANEGAS, GLADYS INÉS, MENDOZA OLMOS, EDMUNDO RAFAEL, and GARZÓN GÓMEZ, MAOLENMARX TATIANA
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SOILS ,CARBON fixation ,SOIL degradation ,PASTURES -- Environmental aspects ,DEFORESTATION ,SOIL quality - Abstract
Copyright of Revista EIA is the property of Escuela de Ingenieria de Antioquia and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2015
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13. USA300-related methicillin-resistant Staphylococcus aureus clone is the predominant cause of community and hospital MRSA infections in Colombian children.
- Author
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Márquez-Ortiz, Ricaurte Alejandro, Álvarez-Olmos, Martha I., Escobar Pérez, Javier Antonio, Leal, Aura Lucia, Castro, Betsy Esperanza, Mariño, Ana Cristina, Barrero, Esther Rocio, Mujica, Sandra Celina, Gaines, Sebastián, and Vanegas, Natasha
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- *
METHICILLIN-resistant staphylococcus aureus , *HOSPITAL care , *JUVENILE diseases , *CHILDREN'S health , *MOLECULAR epidemiology - Abstract
Objective Community-genotype methicillin-resistant Staphylococcus aureus (CG-MRSA) isolates are known to be more virulent and clinically aggressive in children. The goal of the present study was characterize the molecular epidemiology of MRSA isolates causing infections in Colombian children. Methods An observational and prospective study was conducted between April 2009 and June 2011 at 15 hospitals in Bogotá, Colombia. A detailed epidemiological profile was made of 162 children infected with MRSA. The isolates were subjected to antimicrobial susceptibility testing, molecular characterization including 21 virulence genes, SCCmec, spa and agr typing, multilocus sequence typing (MLST), and pulsed-field gel electrophoresis (PFGE). Results Among all isolates included in the study, 85.8% were obtained from patients whose infectious process was initiated in the community; of these, 69,8% occurred in patients without healthcare-associated risk factors. The molecular characterization of the isolates showed a high proportion (95.1%) containing a community-genotype profile with a high prevalence of SCCmec type IV, PVL-positives, and also related to CC8. Most CG-MRSA isolates (143, 92.9%) were genetically related to the pandemic clone USA300, differing by the presence of SCCmec IVc and the absence of the arginine catabolic mobile element (ACME). Conclusions An increase in the frequency of CG-MRSA infections has been reported worldwide. In this study we found that almost all MRSA infections in our pediatric population were caused by community-genotype isolates, supporting the success of the CG-MRSA clones. [ABSTRACT FROM AUTHOR]
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- 2014
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14. Sleep quality perception in youth population.
- Author
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Pérez-Olmos, Isabel, Muñoz-Delgado, Jairo, González-Reyes, Rodrigo, and Talero-Gutiérrez, Claudia
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CLINICAL medicine ,STATISTICAL correlation ,QUESTIONNAIRES ,SLEEP ,KEY performance indicators (Management) - Abstract
Copyright of Revista Ciencias de la Salud is the property of Colegio Mayor de Nuestra Senora del Rosario and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2012
15. ALGUNOS APARTES DE LA TRADUCCIÓN JURÍDICA Y OFICIAL EN COLOMBIA.
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Olmos, Bibiana Clavijo
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TRANSLATING & interpreting , *TRANSLATORS , *EDUCATIONAL programs , *PERFORMANCE - Abstract
Nowadays, there is a growing demand for legal translation due to aspects such as the opening of markets and foreign relations, as stated by Anabel Borja (2007). Are Colombian translators prepared to satisfy the local market needs and to compete globally? Are they competent enough to translate this language for specific purposes? This article has a theoretical background about legal translation that includes an analysis of the competencies a legal translator should have. It contrasts theory with the real practice of translation and with the Colombian official certificate of translators. The main purpose of this article is to analyze the real need of developing competencies as legal translators by following formal education Programs, in order to supply the market needs. [ABSTRACT FROM AUTHOR]
- Published
- 2011
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16. Deberes de protección, 'aun frente a terceros', en la dogmática alemana.
- Author
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OLMOS, JAVIER M. RODRÍGUEZ
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LEGAL judgments ,REASONABLE care (Law) ,THIRD parties (Law) ,JURISPRUDENCE - Abstract
Copyright of Revista de Derecho Privado (0123-4366) is the property of Universidad Externado de Colombia, Departmento de Derecho Civil and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2011
17. ¿Qué pasa con el Pacífico Negro en el Atlántico Negro? El Atlántico Negro de Paul Gilroy frente a los acontecimientos (afro)colombianos.
- Author
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de Olmos, Lioba Rossbach
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BLACK Colombians ,ETHNIC groups ,SLAVE trade ,SLAVERY ,MODERNITY ,CROSS-cultural differences ,ESSENTIALISM (Sexuality) - Abstract
Copyright of Memorias is the property of Fundacion Universidad del Norte and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2009
18. INCREMENTANDO LAS RELACIONES COMERCIALES ENTRE COLOMBIAY CHINA.
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Olmos, Jaime Rafael Ahcar and Medina, Emma Osorio
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COMMERCIAL treaties ,INTERNATIONAL economic relations - Abstract
Copyright of Estudios Gerenciales is the property of Universidad ICESI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2008
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19. A CELLULAR AUTOMATON MODEL FOR THE TRAFFIC FLOW IN BOGOTÁ.
- Author
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OLMOS, L. E. and MUÑOZ, J. D.
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CELLULAR automata , *SEQUENTIAL machine theory , *PATTERN recognition systems , *TRAFFIC flow - Abstract
In this work, we propose a car cellular automaton model that reproduces the experimental behavior of traffic flows in Bogotá. Our model includes three elements: hysteresis between the acceleration and brake gaps, a delay time in the acceleration, and an instantaneous brake. The parameters of our model were obtained from direct measurements inside a car on motorways in Bogotá. Next, we simulated this model with the flux-density fundamental diagram for a single-lane traffic road and compared it with experimental data. Our simulations are in very good agreement with the experimental measurements, not just in the shape of the fundamental diagram, but also in the numerical values for both the road capacity and the density of maximal flux. Our model reproduces, too, the qualitative behavior of shock waves. In addition, our work identifies the periodic boundary conditions as the source of false peaks in the fundamental diagram, when short roads are simulated, that have also been found in previous works. The phase transition between free and congested traffic is also investigated by computing both the relaxation time and the order parameter. Our work shows how different the traffic behavior from one city to another can be, and how important to determine the model parameters for each city. [ABSTRACT FROM AUTHOR]
- Published
- 2004
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20. Epidemiological characteristics and serotype distribution of culture-confirmed pediatric pneumococcal pneumonia before and after PCV 10 introduction, a multicenter study in Bogota, Colombia, 2008–2019.
- Author
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Gutiérrez-Tobar, Iván Felipe, Londoño-Ruiz, Juan Pablo, Mariño-Drews, Cristina, Beltrán-Higuera, Sandra, Camacho-Moreno, Germán, Leal-Castro, Aura Lucia, Patiño-Niño, Jaime Alberto, Álvarez-Olmos, Martha Isabel, Barrero-Barreto, Rocio, Espinosa, Fabio, Suarez, María Alejandra, Ramos, Nicolás, Moreno-Mejia, Vivian Marcela, Marín, Alejandra, Sierra Parada, Claudia Rocio, Pescador, Angela, and Montañez, Anita
- Subjects
- *
PNEUMOCOCCAL meningitis , *PNEUMOCOCCAL vaccines , *CLINDAMYCIN , *CEFTRIAXONE , *SEROTYPES , *STREPTOCOCCUS pneumoniae , *PNEUMOCOCCAL pneumonia - Abstract
• This study represents one of the largest series of culture confirmed pneumonia that evaluates the impact of PCV10 in children. • Describes the important decrease of PCV10 serotypes with an increase in PCV13. • This study shows how in the post-vaccine period, PCV13 serotypes (19A, 6A and 3) were associated with greater severity. Pneumococcal conjugate vaccines (PCVs) have decreased pneumonia in children. Colombia introduced mass vaccination with PCV10 in 2012. Cases of pneumococcal pneumonia from 10 hospitals were included. Two periods were compared: pre-PCV10: 2008–2011 and post-PCV10: 2014–2019. The objective was to compare epidemiological and clinical characteristics before and after PCV10 vaccination. A total of 370 cases were included. Serotypes 1 (15, 11.2%) and 14 (33, 24.6%) were the most frequent in the pre-PCV10 period, with only 4 (3%) cases of serotype 19A and 1 case (0.7%) serotype 3. From the pre-PCV10 period to the post-PCV10 period, cases of serotypes 1 (6, 3.1%) and 14 (1, 7.8%) decreased, while cases of serotypes 19A (58, 30.2%), serotype 3 (32, 16.7%) and 6A (7, 3.6%) increased (p < 0.001); complicated pneumonia (CP) increased significantly (13.4% to 31.8%) (p < 0.001); hospitalizations increased from 8 (5.5–15) to 12 (7–22) days (p < 0.001); and the frequency of PICU admission increased from 32.8% to 51.6% (p = 0.001). The use of ampicillin-sulbactam (0.7% to 24%) and ceftriaxone/clindamycin (0.7% to 5.7%) increased in the post-PCV10 period. The duration of empirical antibiotic treatment was 7 (4–11) days in the pre-PCV10 period and increased to 10 (6–17) days (p < 0.001) in the post-PCV10 period. Lethality showed a slight nonsignificant increase (7.5% vs. 9.9%; p = 0.57) in the post-PCV10 period. PCV10 significantly decreased cases of serotypes 1 and 14, with an increase in cases of serotypes 19A, 3 and 6A, which were the predominant serotypes and had greater severity (e.g., admission to the PICU, CP and more resistance, with an increase in the use of broad-spectrum antibiotics and longer hospitalization) and subsequently included in PCV13. Current data support national and regional evidence on the importance of replacing PCV10 with a higher valence that includes 19A, such as PCV13, with the aim of reducing circulation, particularly of this serotype. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
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