Buscador de Tesis y publicaciones académicas

First Evidence of the Decay B + → π + e + e −

R. Aaij · A. S. W. Abdelmotteleb · C. Abellan Beteta · F. Abudinén · y 196 más

The first evidence for the decay B + → π + e + e − is reported using proton-proton collision data recorded by the LHCb experiment at center-of-mass energies of 7, 8, and 13 TeV, corresponding to an integrated luminosity of 9 fb − 1 . A signal excess with a significance of 3.2 σ is observed and the branching fraction is...

Machine Learning Prediction of Optical Absorption in GaAs 2D Nanostructure under Hydrostatic Pressure

I. Lamrini · M. Hbibi · S. Chouef · M. El Hadi · y 5 más

This work focuses on the modeling and prediction of the optical absorption coefficient in GaAs 2D nanostructure subjected to hydrostatic pressure. The database is generated from numerical calculations describing the optical absorption of exciton confined in GaAs 2D nanostructure. The obtained data are exploited to deve...

Distribución espacial del cuero de sapo en yuca, en el Caribe colombiano

Lilibeth Tordecilla Zumaque · Rodrigo Orlando Campo Arana · Oscar Alberto Burbano-Figueroa

El cuero de sapo de la yuca (CS) ha sido considerado una enfermedad emergente en las Américas, principalmente en Colombia entre 2019–2020. Su etiología se atribuye a una infección mixta de virus y fitoplasmas, que afecta el llenado de las raíces hasta un 100 %. En Colombia, la región Caribe es la principal zona product...

El TLC Colombia-Estados Unidos: Un estudio de caso sobre la problemática de los acuerdos comerciales bilaterales en tiempos de crisis multilateral (I)

David F. Varela · Daniel Serrano Acero

Este artículo analiza la posible renegociación del Tratado de Libre Comercio (TLC) entre Colombia y Estados Unidos en un contexto de crisis del orden multilateral y proliferación de acuerdos bilaterales. Se argumenta que, aunque el TLC ha otorgado acceso al mercado norteamericano desde 2012, no ha corregido el déficit...

Caracterización de especies de Dysdercus Guérin-Méneville, 1831 asociados al agroecosistema algodonero del Sinú Medio, Córdoba, Colombia

Karol Dario Pérez García · Claudio Fernández Herrera

The genus Dysdercus comprises key pests of cotton crops, causing economic damage by feeding on seeds. Therefore, the objective of the research was to characterize the species diversity of this genus. Through collection using a sweep net and active searching, 860 individuals were obtained, which were morphologically ide...

Young people’s resistance within and against unjust systems: The possibilities and challenges of participatory action research-enabled social innovation and social entrepreneurship

Marlies Kustatscher · Edwar Calderón · Claudia Alejandra Cano Betancur · Tony Evanko · y 3 más

This article establishes a dialogue between the fields of participatory action research, social innovation and social entrepreneurship, by presenting learning from two projects with young people in Colombia and critically situating it within intersectional, intergenerational and international power relations. We sugges...

Mujeres en la presidencia de la Sociedad Interamericana de Psicología (SIP): huellas y aportes en la psicología interamericana

Jairo A. Rozo · Andrés M. Pérez-Acosta · Laura Valentina Leguizamón-Parra

The history of the Interamerican Society of Psychology (SIP) reflects the development of the discipline in the Americas and the social changes that have driven women's inclusion in leadership positions. Since its foundation in 1951, SIP has promoted scientific exchange and intercontinental cooperation. However, female...

On Pell, Narayana and Padovan Languages and Their Generalizations

José L. Ramírez · Víctor F. Sirvent · Elif Tan

Intersectionality and the Experiences of Women in Stem in Colombia

null Alba Dalila Ángel Rodríguez

This paper examines the experiences of women in science, technology, engineering, and mathematics (STEM) in Colombia through an intersectional lens. Drawing on focus groups with undergraduate students, graduates, and women in leadership positions, the study analyzes how gender interacts with class, ethnicity, territory...

DISH on chest radiographs: A skeletal clue to hidden cardiovascular risk

Felipe Merchan Ferraz Grizzo · Lais Yurie Facimoto · Luciano Henrique Gazoni Scremin · Leandro Hideki Otani · y 11 más

Abstract Introduction: Diffuse idiopathic skeletal hyperostosis (DISH) is a common but frequently underrecognized skeletal disorder, and epidemiological data from Latin America are lacking. This study aimed to estimate the prevalence of DISH and investigate factors associated with the disease in a Brazilian population....