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.

Darboux Integrals for Schrödinger Planar Vector Fields via Darboux Transformations

Abstract: In this paper we study the Darboux transformations of planar vector fields of Schrodinger type. Using the isogaloisian property of Darboux transformation we prove the \invariance" of the objects of the \Darboux theory of integrability". In particular, we also show how the shape invariance property of the potential is important in order to preserve the structure of the transformed vector field. Finally, as illustration of these results, some examples of planar vector fields coming from supersymmetric quantum mechanics are studied.

Lichen diversity in colombian caribbean dry forest remnants

Abstract: Presentamos un primer estudio de la diversidad y composicion de comunidades de liquenes en remanentes de bosque seco tropical (bs-T) en el departamento de Atlantico, Colombia. Se muestrearon liquenes en dos de las tres areas protegidas del departamento: Distrito de Manejo Integrado (DMI) Luriza y Reserva Forestal Protectora (RFP) El Palomar. El inventario registro 61 especies, incluyendo cuatro especies nuevas para la ciencia: Fissurina linoana Lucking, Moncada & G. Rodr. sp. nov., Graphis lurizana Lucking, Moncada & Celis sp. nov., Graphis mokanarum Lucking, Moncada & M.C. Martinez sp. nov. y Phaeographis galeanoae Lucking, Moncada & B. Salgado-N. sp. nov. Arthonia erupta y Coenogonium saepincola son nuevos registros para America del Sur, mientras que trece especies son reportadas por primera vez para Colombia. Unas 37 especies adicionales son nuevos reportes para Atlantico, incrementando el total de especies conocidas para el departamento de 27 a 84. Con 42 especies en Luriza y 31 en El Palomar, la riqueza de especies fue comparable con la de otros sitios de bs-T en el Neotropico. El traslape en la composicion de especies entre los dos sitios es bajo, con solamente doce (20 %) compartidas, indicando un alto nivel de heterogeneidad. Las afinidades biogeograficas son mayores con los bs-T de Centroamerica, lo que coincide con las de plantas lenosas. Estos resultados enfatizan la importancia de los remanentes de bs-T en Colombia para la conservacion de una biodiversidad poco conocida.

Segundo Consenso Clínico de la Sociedad Iberoamericana de Neonatología: manejo hemodinámico del recién nacido

Abstract: This study reports on the process and results of the Second Clinical Consensus of the Ibero-American Society of Neonatology. Eighty neonatologists from 23 countries were invited to collaborate and participate in the event. Several questions of clinical-physiological importance in the hemodynamic management of newborns were addressed. Participants were divided into groups to facilitate interaction and teamwork, with instructions to respond to three to five questions by analyzing the literature and local factors. Meeting in Mar del Plata, Argentina, the Consensus Group served as a form for various presentations and discussions. In all, 54 neonatologists from 21 countries attended, with the objective of reaching a consensus on such matters as concepts and definitions of hemodynamic instability, the physiopathology of hemodynamic compromise, recommended therapy strategies, and hemodynamic monitoring. It is hoped that this international experience will serve as a useful initiative for future consensus building and reduction of the existing disparities among the countries of the Region in terms of treatment and outcomes.