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Now showing items 856-875 of 1620
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ICT mediated collaborative work in system dynamics learning
Although mathematical modeling is a general engineering skill, problem analysis and solution design conventional tools in systems engineering, such as use case diagrams, class diagrams and relational diagrams among others, ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Identificación de pérdidas técnicas en redes de baja tensión con sistemas de puesta a tierra
En este trabajo se propone una aplicación para observar el impacto del neutro y sistemas de puesta a tierra en el cálculo de pérdidas técnicas, usando un fl ujo de carga radial trifásico tetrafi lar. Para asegurar y acelerar ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Identificación de polímeros mediante espectroscopia de emisión de plasmas producidos por láser (libs)
Se espera que en Colombia en los próximos años se realicen misiones humanitarias para la remoción de Artefactos Explosivos Improvisados (AEI) para asegurar el tránsito de personas y bienes, particularmente en zonas rurales. ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Identificación de sistemas de excitación: análisis detallado de metodología y resultados
En este documento se presenta la descripción detallada de la metodología y los resultados obtenidos para la identificación de parámetros de modelos de sistemas de excitación del estándar IEEE std 421.5 de 1992, propuestos ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Identification of areas of intervention for public safety policies using multiple correspondence analysis
Analysis of accident reports has been a useful tool in occupational safety research. According to European Statistics on Accidents at Work framework (ESAW), important variables related to the main circumstances of accidents ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Identification of factors that affect the loss of student status using a logit survival model for discrete time data
The phenomenon of loss of the student status due to low academic performance is a serious problem that affects the main universities of this country. Low performance is also related in a direct way to student dropout. This ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Identification of impacts of stages and materials on life cycle of footwear
The environmental impacts caused by human activity, affects all productive and commercial activities that support the day to day. The products of massive consume such as footwear drive large impacts according to the materials ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Identification of resilience factors, variables and indicators for sustainable management of urban drainage systems
Water management systems in general and urban drainage systems (UDS) in particular should be designed to ensure not only the provision of public service but also their sustainability and resilience. This paper performed ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Identification of wetland areas in the context of agricultural development using Remote Sensing and GIS
This study aims to determine the wetland potential on a pixel basis on the floodplain of the Leon River: hydrology, hydrophytic vegetation and hydromorphic soils were taken into account. Field measurements and spatially ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Identifying dead features and their causes in product line models: an ontological approach
Feature Models (FMs) are a notation to represent differences and commonalities between products derived from a product line. However, product line modelers could unintentionally incorporate dead features in FMs. A dead ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Identifying methods and techniques for the harmonization of multiple process reference models
Several works to support the area of harmonization of multiple models have recently been proposed. In order to offer a clear and general view of the proposals described in these works it is important carry out an analysis ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Ie - riss: una herramienta computacional para la estimación de pérdidas por sismo en edificaciones
Una formulación probabilista para estimar tasas de excedencia de pérdidas por terremoto es presentada. Luego de exponer la utilidad de este tipo de modelos, se presenta la formulación matemática de un modelo Poissoniano ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Immobilization of recognition elements on a self-assembled monolayers bio-platform
Tailored materials formed by spontaneous two-dimensional arrangement of 3-aminopropyltriethoxysilane self-assembled monolayer on glass (amino-functionalized glass) has been exploited to attach biomolecules in well-organized ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Impact estimates of the actions for the rehabilitation of energy efficiency in residential building
The prediction of energy savings and indoor air quality resulting from the implementation of rehabilitation measures for energy efficiency in residential buildings is paramount to invest in the right technology and optimize ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Impact of a workplace exercise program on neck and shoulder segments in office workers
Work-related musculoskeletal disorders are a common problem among office workers. The purpose of this study is to evaluate the impact of a workplace exercise program on neck and shoulder pain and flexibility in office ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Impact of changing location and power of a PV system in electrical distribution networks, integrating MATLAB and OpenDSS
This paper presents the electrical impact of connecting a photovoltaic (PV) system without storage to the electric distribution network 13-bus IEEE test case, integrating MATLAB and OpenDSS using a fluctuated vector of ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Impact of electrical energy efficiency programs, case study: food processing companies in cuenca, ecuador
This exploratory study illustrates the effects of the application of electrical energy efficiency programs in 7 food processing companies in Cuenca, Ecuador. The research encompassed phases of diagnosis, intervention and ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Impact of previous acclimatization of biomass and alternative substrates in sunflower oil biodegradation
The aim of this work is to evaluate the incidence rate of the previous acclimatization of biomass and the presence of any other easily biodegradable substrates, such as sucrose. This experiment will be undertaken with ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Impact of supply voltage distortion on the current harmonic emission of non-linear loads
Electronic devices have a non-linear characteristic and emit harmonics into the low voltage grid. Different harmonic studies analyze their impact on the grids based on different types of harmonic models. The most used model ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Impact of web accessibility barriers on users with a hearing impairment
Several user tests were carried out on people with a hearing impairment to evaluate the impact of different web accessibility barriers on two similar web sites, one accessible and the other not accessible. The tests’ focus ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna.
