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Effects of Different Concentrations of Arsine on the Synthesis and Final Properties of Polypropylene
(2022-07-31)
This article studies the effects of arsine on the synthesis and thermal degradation of 4 sam ples of virgin polypropylene (PP-virgin) and proposes reaction mechanisms that allow understanding
of its behaviour. Different ...
Impact of Traces of Hydrogen Sulfide on the Efficiency of Ziegler–Natta Catalyst on the Final Properties of Polypropylene
(2022-09-19)
Sulfur compounds are removed from propylene through purification processes. However,
these processes are not 100% effective, so low concentrations of compounds such as H2S may be
present in polymer-grade propylene. This ...
Identification and Quantification of Microplastics in Effluents of Wastewater Treatment Plant by Differential Scanning Calorimetry (DSC)
(2022-04-20)
In this research, the presence of microplastics was detected through a differential scanning
calorimetry (DSC) analysis of three wastewater treatment plants. One of these plants applied
only a preliminary treatment stage ...
Assessing Forest Cover Loss Using Landsat Images and GIS: A Case Study in Colombian Protected Area
(2022)
The Corchal “El Mono Hernández” Fauna and Flora Sanctuary is a protected area located in northern Colombia and is home to the Pterocarpus officinalis forest. In this area, however, this forest cover is declining due to ...
On the fractal properties of cosmic rays and Sun dynamics cross-correlations
(2022)
We investigate the cosmic rays and ten physical parameters of heliosphere behavior considering the scaling features of their temporal evolution. Our analysis start with the cosmic rays measurements by a neutron monitor ...
Inventory Models in a Sustainable Supply Chain: A Bibliometric Analysis
(2022)
This paper presents a bibliometric analysis of inventory models in a sustainable supply
chain. The methodology contains reviewing previous research with a performance evaluation,
network analysis, and science mapping to ...
Determining factors for the creation of innovation-based ventures
(2022)
This research aims to determine the impact of internal and external factors of Social Capital, Entrepreneurial Self-Efficacy, and Person-Entrepreneurship Fit in the transition of nascent entrepreneurs toward venture creation. ...
A Six Sigma Approach to Assessing the Quality of Higher Education in Colombia [Un enfoque de Seis Sigma para evaluar la calidad de la educación superior en Colombia]
(2022)
Las instituciones universitarias se enfrentan a retos de competitividad que se enmarcan en las exigencias de la sociedad, los cambios de preferencia de los estudiantes y la evolución tecnológica; esto plantea la necesidad ...
Neural High Order Sliding Mode Control for Doubly Fed Induction Generator based Wind Turbines
(2022)
Wind energy has many advantages because it does not pollute and is an inexhaustible source of energy. In this paper Neural High Order Sliding Mode (NHOSM) control is developed for Doubly Fed Induction Generator (DFIG) based ...
Academic efficiency of engineering university degrees and its driving factors. A PLS-DEA approach
(2022)
This research develops an academic production function for the educational process of industrial engineers in Colombia. The proposed function objectively analyses the relationships between the academic competencies obtained ...
Universidad Tecnológica de Bolívar - 2017 Institución de Educación Superior sujeta a inspección y vigilancia por el Ministerio de Educación Nacional. Resolución No 961 del 26 de octubre de 1970 a través de la cual la Gobernación de Bolívar otorga la Personería Jurídica a la Universidad Tecnológica de Bolívar.