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Dyna: Envíos recientes
Mostrando documentos 21-40 de 1620
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Forming adapted teams oriented to collaboration: detailed design and case study
Collaborative work is becoming more important, because of the increasing size and complexity of problems. There are various tools to do collaborative work that facilitate information sharing, activity collaboration among ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Information systems applied to transport improvement
Transport is one of the most relevant elements for the competitiveness of companies and cities. An inadequate transportation system generates high costs and low customer service levels, which ultimately produces a negative ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Design and implementation of a wireless software-defined radio testbed radio testbed
Software-defi ned radio (SDR) provides a convenient framework for the design and implementation of a communication system, by separating the signal processing algorithms from the communication hardware. This separation ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
The performance of some meta-heuristics in continuous problems studied according to the location of the optima in the search space
Many hard optimization problems can only be effectively handled by meta-heuristic methods. Some continuous optimization problems have specifi c characteristics that demand a particular interest. These features include the ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Analysis of models and metacognitive architectures in intelligent systems
Recently Intelligent Systems (IS) have highly increased the autonomy of their decisions, this has been achieved by improving metacognitive skills. The term metacognition in Artifi cial Intelligence (AI) refers to the ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Route optimization of urban public transportation
In this paper we show the optimization process of urban public transportation routes based on operations research techniques. This is shown in the outline of the development and importance of public transportation planning, ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Simulation based on system dynamics for evaluating the quality of transport service in a complex social system
This report presents the creation and simulation of a model based on system dynamics, applied to a complex system, in this case a system of urban public transport for medium-sized cities, evaluating the service quality ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Weighted salience allocation to goals in the unc-method
The KAOS (Knowledge Acquisition autOmated Specifi cation) goal diagram can be used to hierarchically represent and analyze organizational goals. In the context of the UNC-Method, such goals are often written in the ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
An interpolating curve subdivision scheme based on discrete first derivative
This paper develops a new scheme of four points for interpolating curve subdivision based on the discrete fi rst derivative (DFDS), which reduces the apparition of undesirable oscillations that can be formed on the limit ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
A mobile architecture for integration of smartphones with lbs for flora and fauna inventories
Smartphones currently have a large number of sensors and more processing capacity, allowing greater integration of a mobile architecture supported by an external Location Based System. The following paper will contextualize ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Electricity demand forecasting using a sarimamultiplicative single neuron hybrid model
The combination of SARIMA and neural network models are a common approach for forecasting nonlinear time series. While the SARIMA methodology is used to capture the linear components in the time series, artifi cial neural ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Valorization of residues from refining of used vegetable oils
This study investigates the advantages of two-phase anaerobic digestion for treating a mixture (1/5 v/v) of used vegetable oils processing wastes and pig manure using two semi-continuous digesters operated at mesophilic ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Influence of the normal stresses to direction of shear flow in the rheology of concentrated kaolin suspensions
Due to the multiple applications that kaolin has, including the ceramic industry where it is used as a slurry with high solid concentrations, its rheological behavior is quite important in mixing, agitation and pumping ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
A hazard index for roadside of two-lane rural roads
Roadside areas are elements intended to reduce the Run-off-road crashes. The hazardousness is an indicator of compliance of this objective. There are few methods to measure hazardousness, which usually depend of the ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Design of a three-finger end effector for optimal grip
This paper presents the design of a three-fingered gripper with two degrees of freedom (DOF) per finger for a total of six (DOF). We show a brief mathematical description of the kinematics involved in the gripper with which ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Analysis of vehicular traffic flow using a macroscopic model
Today the most cities in the world face different problems caused by vehicular traffic due to the increasing number of vehicles on road, such as traffic congestion, environmental pollution, excessive noise, increased ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Making use of coastal wave energy: a proposal to improve oscillating water column converters
This paper aims to describe an alternative design (protected by patent), for an onshore wave based energy converter, specifically an oscillating water column, capable of providing increased efficiency. In order to compare ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Bioethanol production by fermentation of hemicellulosic hydrolysates of african palm residues using an adapted strain of scheffersomyces stipitis
Ethanol production using a strain of Scheffersomyces stipitis (Pichia stipitis) adapted to inhibitors of african palm hydrolysates was evaluated. The strain adaptation by cultivations in mediums progressively concentrated ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Analytical model to determine optimal production lots considering several productive and logistics factors
The current economic crisis has led companies worldwide to pursue costs reductions in order to remain productive. To support this effort we propose an analytical model to establish the optimal lot size based on the celebrated ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Medición de orientación al mercado en las empresas de distribución de gas natural en colombia
Este documento de investigación brinda un aporte al conocimiento, enfocado hacia el análisis de la orientación al mercado y la viabilidad de su concepto aplicado a las empresas de distribución de gas combustible por redes ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna.
