En el Repositorio Escuela Colombiana de Ingeniería Julio Garavito están depositados materiales en formato digital fruto de la producción científica o académica, de esta manera permite almacenar, difundir y preservar información de vital importancia.

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Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions

Uribe-Jongbloed, Alberto; Albarracín López, Lorena Isabel; Puentes Parodi, Jaime Alejandro (2012)

The main objective of the study was to determine the biochemical and physical conditions of two different types of polymeric materials (HDPE with oxo-additive and PLA) when subjected to conditions similar to those presented ...
Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network

Paz Penagos, Hernán; Guerrero Rodríguez, Néstor (Bogotá, 2020)

Context: This paper presents the design and development of an electronic device that operates as a satellite backup channel for automatic vehicle location (AVL) equipment, whose only communication channel is the cellular ...
Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia

Moreno-Chuquen, Ricardo; Ducuara Barrera, Yuliana; Rojas Góngora, Angélica (Colombia, 2015-11-13)

Este artículo construye y analiza tres escenarios energéticos en Colombia para explorar el impacto de la integración de fuentes de energía eléctrica que utilizan recursos renovables en escenarios a largo plazo incluyendo ...
The use of sanitary pads and menstrual cups and their impact on environment

Sanchez Londoño, Yuly Andrea; Alzate, Erika (IEEEBogotá, 2020)

This article presents the identification and evaluation of the impacts generated during the use and disposal of sanitary Pads and menstrual cups. The methodology adopted for the environmental assessment is based on the ...
Coexistence for LTE-Advanced and FSS Services in the 3.5GHz Band in Colombia

Castellanos, German; Paz Penagos, Hernán; Teuta Gomez, Guillermo ; Joseph, Wout (IEEE Transactions on Signal ProcessingGraz, Austria, 2020)

The 3.5GHz band is an optimal candidate for 5G networks due to its propagation characteristics and massive bandwidth. However, services like the Fixed Satellite Service (FSS) are using this band in several countries. ...

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Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions
...
Uribe-Jongbloed, Alberto | 2012

The main objective of the study was to determine the biochemical and physical conditions of two different types of polymeric materials (HDPE with oxo-additive and PLA) when subjected to conditions similar to those presented inside a sanitary landfill. These materials are commercialized within the country claiming to be biodegradable under certain conditions. However, the conditions in which such degradation may occur are completely unknown from those presented inside s solid waste final disposal site (sanitary landfill). The experiment simulated the general conditions to which the materials would be subjected once inside a sanitary landfill, (absence of molecular oxygen, absence of light, constant temperature, high humidity, among others). Changes in biochemical and physical conditions were monitored as well as the container. These changes may indicate degradation of the polymers. Along the experiment, not enough evidence could be observed that doubtlessly showed actual biodegradation in any of the plastic materials tested.

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Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network
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Paz Penagos, Hernán | 2020

Context: This paper presents the design and development of an electronic device that operates as a satellite backup channel for automatic vehicle location (AVL) equipment, whose only communication channel is the cellular network. Method: The design, manufacture and assembly of the hardware followed 4 phases, and it was aligned with the IPC 2221 standard. This allowed improving the design experience and guaranteed the correct electrical operation in the final product. Results: The information sent by the developed device corresponds to the data generated by the AVL device, which indicates that the information processing was correctly designed. Additionally, it was possible to obtain a functional and versatile device in which the blocks were correctly integrated; its firmware was designed to receive future updates that improved and expanded its capacity and compatibility with other devices. Conclusions: The final product, which works with the Iridium network, seeks to satisfy the technological requirements of the freight transport sector in Colombia with a low-cost, versatile, and easily integrated solution. The implementation of this type of technologies expands the capacity of tracking mobile assets, even in places where there is no cellular network coverage.

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Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia
...
Moreno-Chuquen, Ricardo | 2015-11-13

Este artículo construye y analiza tres escenarios energéticos en Colombia para explorar el impacto de la integración de fuentes de energía eléctrica que utilizan recursos renovables en escenarios a largo plazo incluyendo impacto medio ambiental. Los escenarios energéticos prospectivos permiten determinar evidencias del nivel de integración de las fuentes de energía eléctrica renovables en el sistema interconectado nacional acorde a decisiones de políticas energéticas en el corto y mediano plazo. Un escenario considera la evolución usual sin considerar la integración de recursos renovables considerando únicamente la inclusión de nuevas centrales térmicas a carbón y gas natural. Los otros escenarios consideran aspectos que dilucidan la integración de fuentes no convencionales de energía a diferentes niveles según decisiones en el corto plazo acerca de la planeación de integración de nuevas fuentes tanto convencionales como no convencionales.

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The use of sanitary pads and menstrual cups and their impact on environment
...
Sanchez Londoño, Yuly Andrea | 2020

This article presents the identification and evaluation of the impacts generated during the use and disposal of sanitary Pads and menstrual cups. The methodology adopted for the environmental assessment is based on the Conesa methodology [4]. Likewise, to determine the environmental significance based on the evidence or probability of occurrence, laboratory analyses were conducted to evaluate some physicochemical parameters to two human menstrual blood samples and the amount of solid waste generated by the use of each was determined for each one of these products taking into account a population sample. As a result, the quality of the disposed liquid waste was determined; that is, menstrual blood, and possible impacts were identified on the biotic, abiotic, and socio-economic media, which were compared for each one of the products. The most relevant negative impacts were "Alteration of the local economy" present in the activity called disposal of sanitary pads’ solid waste and "customs" present in the activity called the use of menstrual cups.

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Coexistence for LTE-Advanced and FSS Services in the 3.5GHz Band in Colombia
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Castellanos, German | 2020

The 3.5GHz band is an optimal candidate for 5G networks due to its propagation characteristics and massive bandwidth. However, services like the Fixed Satellite Service (FSS) are using this band in several countries. Therefore, this paper presents a coexistence study of the Long Term Evolution - Advanced (LTE-A) and FSS services in the 3500-3700 MHz in Colombia. Simulations were done in realistic scenarios in the city of Bogota, Colombia. Preliminary results show that critical scenarios are the ones from the LTE eNodeB (eNB) and Users Equipment (UE) nodes to the FSS earth stations. The study includes the analysis of Guard Bands (GB) and arrival angles into the Protection Distances (PD). Results show that the PD is highly dependent on the angle of the interfering signal and the GB used. The PD for a cochannel interference in a suburban scenario is higher than 250km, in the worst-case scenario, and could be reduced down to 17.5 km if a 25 MHz GB is included and the angular difference of the interfering LTE-A signal is 42⁰. Moreover, our results show that the PD needed for interference from UE are 100 times less compared to the eNB ones.

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Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions

Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network

Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia

The use of sanitary pads and menstrual cups and their impact on environment

Coexistence for LTE-Advanced and FSS Services in the 3.5GHz Band in Colombia

Envíos recientes

Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions

Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network

Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia

The use of sanitary pads and menstrual cups and their impact on environment

Coexistence for LTE-Advanced and FSS Services in the 3.5GHz Band in Colombia

Repositorio Escuela Colombiana de Ingeniería Julio Garavito

Communities in DSpace

Recently Added

Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions ﻿

Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network ﻿

Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia ﻿

The use of sanitary pads and menstrual cups and their impact on environment ﻿

Coexistence for LTE-Advanced and FSS Services in the 3.5GHz Band in Colombia ﻿

Envíos recientes

Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions

Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network

Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia

The use of sanitary pads and menstrual cups and their impact on environment

Coexistence for LTE-Advanced and FSS Services in the 3.5GHz Band in Colombia

Determination of biochemical and physical conditions of plastics denominated as “biodegradable” subjected to anaerobic conditions

Electronic Device for Satellite Backup of Automatic Vehicle Location Equipment Using the Iridium Network

Escenarios energéticos a 2050 con integración de fuentes de energía eléctrica renovables en Colombia

The use of sanitary pads and menstrual cups and their impact on environment

Coexistence for LTE-Advanced and FSS Services in the 3.5GHz Band in Colombia