Universidad del Norte, 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.

Lexis, Lexical Competence and Lexical Knowledge: A Review

Abstract: Lexis is one essential component of language and language development. Limited lexical knowledge can lead EFL learners to frustration and demotivation. To reach a higher level of development in the four basic communication skills, learners should have a basis of lexis that allows them to do so. One of the factors affecting the ongoing development of communicative competence is neglecting the systematic teaching of lexis. Teachers’ lack of knowledge of the lexical field has contributed negatively to this current situation. To meet these needs, this article reviews concepts such as lexis/vocabulary, lexical competence and knowledge and size and depth of lexical knowledge. It discusses new perspectives that could help language teachers develop conceptual knowledge to handle lexical instructional practice.

Performance evaluation of structures with reinforced concrete columns retrofitted with steel jacketing

Abstract: Several existing reinforced concrete (RC) buildings fail to conform with current seismic codes, increasing its susceptibility to damage and collapse during earthquakes A concern for building upgrading and rehabilitation has grown considerably in the last decades However, there is limited information related to the seismic performance of RC buildings retrofitted with steel jacketing Retrofitting of RC buildings leads to different techniques that have been developed in the last decades The selection of adequate techniques commonly depends on desired performance levels, financial criteria, or other non-technical judgment This paper assesses the seismic performance of a six-story RC building retrofitted with steel jacketing that is located in Cartagena de Indias (Colombia) The building was designed and constructed in 2010 without considering the requirements prescribed by the NSR-10 Colombian code In 2017, another building collapsed in the same city for several non-compliances with Colombian seismic code This investigation focuses on the seismic upgrading of the building, studying the influence of different material properties of the existing building and load scenarios on the building behavior The proposed steel jacketing improves the compressive and flexural capacity of retrofitted columns, along with the ductility of the building