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.

An intercomparison of swan and wavewatch iii models with data from ndbc-noaa buoys at oceanic scales

Abstract: A simulation of wind-wave activity in the North Atlantic Basin, between June to August of 2002, has been performed using the SWAN model. The results of the simulations were compared with data obtai...

Isotope record of anthropogenic lead pollution in lake sediments of Florida, USA

Abstract: We examined the anthropogenic lead (Pb) burden that accumulated in sediment of lakes in the southeastern USA during the last ~150 years. Mining, smelting, agriculture, and fossil-fuel combustion are known to have contributed to Pb pollution in lakes of other regions. Few studies, however, have examined Pb sequestered in lakes of the southeastern USA, particulary peninsular Florida, which is subject to less continental atmospheric influence than other regions of the eastern USA. We obtained sediment cores from Little Lake Jackson and Little Lake Bonnet in Highlands County, Florida and used Pb isotopes in the records to identify principal sources of Pb contamination. The sediment records showed that changes in Pb concentration and isotope ratios correspond temporally with gasoline consumption in the USA, as well as with changes in lead ores used to produce leaded gasoline. Lead concentrations in the study lakes showed temporal variations that were similar to those found in peat records from east-central Florida. Isotope trends were similar to the mean USA atmospheric Pb deposition record, and to Pb isotope records from Bermuda and Atlantic corals. We modeled the isotopic composition of the anthropogenic Pb in lake sediments and found that the overall trend is controlled by Pb that was released during leaded gasoline combustion. There is, however, additional Pb at each site that comes from sources that are not fully represented by the natural, background Pb. Lead isotope ratios and Pb/arsenic (As) ratios provide evidence that Pb deposition in lakes during the middle 1900s might have been influenced by lead arsenate applications to golf courses, a source that is often ignored in Pb isotope studies. Isotope evidence confirms, however, that following cessation of commercial lead arsenate use in the 1960s, atmospheric alkyl lead was again the primary influence on Pb in sediments of the study lakes.

Risky riding behaviours among motorcyclists in Malaysia: A roadside survey

Abstract: Motorcyclists are over-represented in fatal crashes in Low- and Middle-Income Countries (LMICs). In Malaysia, motorcyclists comprise about 60% of all fatalities in road crashes. However, the prevalence and determinants of risky riding behaviours have been rarely studied in the country. This study aims to investigate motorcycle-related risky riding behaviours at signalised intersections. A total of 72,377 observations were made during six days at six different signalised intersections in Terengganu, Malaysia. Four risky riding behaviours were observed together (i.e. helmet non-use, red-light running, mobile phone use, turn signal neglect) along with additional demographic and contextual factors. The most prevalent risky riding behaviour was turn signal neglect (29.7% of all observations), and the least prevalent was mobile phone while riding (0.2% of all observations). Four logistic regressions were fitted to predict the four risky riding behaviours using the demographic and contextual explanatory factors. The results suggest that helmet non-use increases among female riders, riders wearing industrial uniforms, carrying passengers, riding during the weekend, during off-peak hours, during clear weather, at T-junctions, on multi-lane roads, and on minor road approaches. Red light running increases among female riders, riders wearing industrial uniforms, carrying passengers, during clear weather, at T-junctions, on multi-lane roads, and on major road approaches. Mobile phone use increases among female riders, riders wearing industrial uniforms, carrying passengers, and at cross-junctions. Turn signal neglect increases among male riders, riders not wearing industrial uniforms, solo riders, on weekends, during off-peak hours, during clear weather, on single-lane roads, and on minor road approaches. The findings of this study have significant implications for the development of targeted countermeasures such as education programs and road policing.

Emotion Regulation in Children and Adolescents: concepts, processes and influences

Abstract: espanolEl presente articulo ofrece un panorama actualizado de lo que ha constituido el estudio de la regulacion emocional en la infancia y la adolescencia desde la perspectiva de la psicologia del desarrollo. El documento se basa principalmente en la revision de publicaciones de revistas indexadas entre los anos 2001 y 2016. En primer lugar, se discuten los aspectos conceptuales de la definicion de regulacion emocional, luego se examinan influencias neurobiologicas y ambientales sobre los mecanismos regulatorios para finalmente analizar las caracteristicas del desarrollo de los procesos de regulacion emocional desde la infancia temprana hasta el final de la adolescencia, enfatizando en los alcances para cada periodo vital. El objetivo ultimo de esta revision es proporcionar un fundamento teorico solido para el estudio de la regulacion emocional en ninos y adolescentes colombianos, una poblacion que aun no ha sido objeto de investigacion en cuanto a este tema EnglishThis article provides an updated overview about the studies on emotion regulation in children and adolescents from the perspective of developmental psychology. It is mainly based on articles published in indexed psychology journals between the years 2001 and 2016. Conceptual aspects of the definition of emotional regulation are discussed, followed by an examination of neurobiological and environmental influences that impact the regulation of emotion during infancy and adolescence. Finally, characteristics of the development of the regulatory processes are analyzed from infancy to late adolescence, emphasizing the vital regulatory scopes for each period. The ultimate goal of this paper is to provide a documented basis for the study of emotion regulation in Colombian children and adolescents, a neglected population in regards to this topic.