Institution
Universidad del Norte, Colombia
Education•Barranquilla, Colombia•
About: Universidad del Norte, Colombia is a education organization based out in Barranquilla, Colombia. It is known for research contribution in the topics: Population & Context (language use). The organization has 3562 authors who have published 4355 publications receiving 37861 citations. The organization is also known as: University of the North, Colombia & Uninorte.
Papers published on a yearly basis
Papers
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TL;DR: In this article, a study of the in situ production of tantalum carbide nanodispersoids in a copper matrix was presented, which was produced by means of reactive milling in hexane (C6H14) followed by hot extrusion.
16 citations
15 Dec 2005
TL;DR: To determine risk factors associated to cigarrette consumption in adults from Barranquillas southwest, people identified from the database of the «Chronic and non contagious diseases from Bar Branquilla southwest» study are identified.
Abstract: Aim: To determine risk factors associated to cigarrette consumption in adults from Barranquillas southwest. Methods: Analytic survey (145 cases and 290 controls). People identified from the database of the «Chronic and non contagious diseases from Barranquillas southwest» study. The tabulation was performed on epiinfo 6.04, with outputs to microsft word and microsoft Excel.
16 citations
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TL;DR: Two metrics are described to measure the complexity involved in assembly and disassembly tasks for open architecture products during its use phase to enhance the sustainability performance of products through the measurement of complexity in modular systems for the decision-making during the design stage.
Abstract: This paper describes two metrics to measure the complexity involved in assembly and disassembly tasks for open architecture products during its use phase. The approach proposed is based on the summ...
16 citations
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TL;DR: A critical review of content and language integrated learning (CLIL) in Latin America between 2008 and 2018 is presented in this paper. But, the focus of the review is on the content-and language-driven approach.
Abstract: Bilingual education, usually a community’s L1 and English continues spreading geographically and across educational systems worldwide. With this expansion, the development of bilingual education approaches is under constant scrutiny. One recent approach is content and language integrated learning (CLIL). European in origin, CLIL can be viewed as an educational or language teaching approach and it refers to the teaching of curricular content and L2 in an integrated manner. This approach has received international attention, yet, how CLIL unfolds in settings outside Europe appears underrepresented in international publications. The aim of this article is to provide a critical review of CLIL in Latin America between 2008 and 2018. We surveyed 64 items (articles, book chapters, and dissertations) published in regional and international outlets: 41 empirical studies, 19 practice-oriented publications, and four reviews. It begins by summarizing the CLIL continuum with a focus on content- and language-driven CLIL and CLIL frameworks. It then provides a synthesis of empirical studies and practice-oriented publications about CLIL in different Latin American settings. The corpus is analyzed following these unifying themes: pedagogy, perceptions and beliefs, teacher education, global citizenship, and language development. From this review, it transpires that Latin American CLIL is mostly implemented and examined from a language-driven perspective in private primary, secondary and higher education. Suggestions and implications for further research and practice are included.
16 citations
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TL;DR: This research concludes that studied RCAs might be used as replacements of coarse aggregate in asphalt mixtures since chemical properties do not affect the overall chemical stability of the asphalt mixture.
Abstract: The incorporation of a recycled concrete aggregate (RCA) as a replacement of natural aggregates (NA) in road construction has been the subject of recent research. This tendency promotes sustainability, but its use depends mainly on the final product's properties, such as chemical stability. This study evaluates the physical and chemical properties of RCAs from two different sources in comparison with the performance of NA. One RCA was obtained from the demolition of a building (recycled concrete aggregate of a building-RCAB) and another RCA from the rehabilitation of a Portland cement concrete pavement (recycled concrete aggregate from a pavement-RCAP). Characterization techniques such as X-ray fluorescence (XRF), X-ray diffraction (XRD), UV spectroscopy, and atomic absorption spectrometry were used to evaluate the RCAs' coarse fractions for chemical potential effects on asphalt mixtures. NA was replaced with RCA at 15%, 30%, and 45% for each size of the coarse fractions (retained 19.0, 12.5, 9.5, and 4.75 sieves in mm). The mineralogical characterization results indicated the presence of quartz (SiO2) and calcite (CaCO3) as the most significant constituents of the aggregates. XFR showed that RCAs have lower levels of CaO and Al2O3 concerning NA. Potential reactions in asphalt mixtures by nitration, sulfonation, amination of organic compounds, and reactions by alkaline activation in the aggregates were discarded due to the minimum concentration of components such as NO2, (-SO3H), (-SO2Cl), and (Na) in the aggregates. Finally, this research concludes that studied RCAs might be used as replacements of coarse aggregate in asphalt mixtures since chemical properties do not affect the overall chemical stability of the asphalt mixture.
16 citations
Authors
Showing all 3594 results
Name | H-index | Papers | Citations |
---|---|---|---|
Sid E. O'Bryant | 41 | 168 | 8123 |
Francisco Rothhammer | 39 | 191 | 8247 |
Juan Carlos Niebles | 37 | 70 | 9751 |
Miguel A. Labrador | 36 | 193 | 5951 |
Alcides Chaux | 35 | 121 | 4795 |
Calogero M. Santoro | 30 | 157 | 3041 |
Toby Miller | 30 | 378 | 4694 |
Diego Viasus | 29 | 75 | 2069 |
Carlos Lizama | 28 | 183 | 2617 |
Robert Pitt | 28 | 234 | 4015 |
Camilo Montes | 28 | 74 | 2878 |
James Hall | 27 | 114 | 2785 |
Luis A. Cisternas | 26 | 154 | 2012 |
Antonio Rodríguez Andrés | 26 | 91 | 2151 |
Ana C. Fonseca | 26 | 120 | 2608 |