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Local anodic oxidation on silicon (100) substrates using atomic force microscopy
A characterization of local anodic oxidation using scanning probe microscopy is performed on a (100) silicon substrate. The formation of patterns varies as a function of voltage, humidity, and scanning speed. A set of ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Local polynomial approximation and intersection of confidence intervals for removing noise of lightning electric field measurements
Lightning electric field (LEF) measurements are aperiodic signals characterized by inherent noise of different sources, i.e., it is not possible to register a noise-free signal. In the last decade, the denoising of LEF ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Localización de bifurcaciones deslizantes en un oscilador rotativo de doble leva
En este trabajo se analizan las bifurcaciones no suaves no convencionales también llamadas deslizantes en un sistema con múltiples límites de discontinuidad. El método de seguimiento de puntos singulares (SPT) es probado ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Logistics process improvement of warehousing and picking in a colombian company textile sector
This research considers the design problem of distribution center and picking in a Colombian textile company. Through a literature review, the methodology for the design of the facility that best adjusts the company for ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Long term performance of existing portland cement concrete pavement sections – case study
This paper presents the performance of seventeen rigid pavements made of Portland Cement Concrete (PCC) located in the State of Ohio, USA. The Falling Weight Deflectometer (FWD) testing method was used in a total of 58 km ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Lossless compression of hyperspectral images with pre-byte processing and intra-bands correlation
This paper considers an approach to the compression of hyperspectral remote sensing data by an original multistage algorithm to increase the compression ratio using auxiliary data processing with its byte representation ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Lottery scheduler for the Linux kernel
This paper describes the design and implementation of Lottery Scheduling, a proportional-share resource management algorithm, on the Linux kernel. A new lottery scheduling class was added to the kernel and was placed between ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Low-cost platform for the evaluation of single phase electromagnetic phenomena of power quality according to the IEEE 1159 standard
This paper presents the development of a data acquisition system and the evaluation of the electromagnetic phenomena associated with power quality according to the IEEE Standard 1159-1992 and applied to the particular case ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Luffa Cylindrica as a natural adsorbent of cyanide ion in aqueous médium
Cyanide is considered a highly toxic species for any ecosystem in as much as it causes disease in humans, contributes to the loss of soil fertility and contaminates water sources, constituting an important factor in the ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
M2M system for efficient water consumption in sanitary services, based on intelligent environment
This paper describes the fulfilled research process for the development of an intelligent system for the efficient use of water in sanitary units in the domestic environment. Fundamentally, the research focused on two ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Machine vision algorithms applied to dynamic traffic light control
This paper presents a fuzzy traffic controller that in an autonomous, centralized and efficient way, manages vehicular traffic flow in a group of intersections. The system uses a computer vision algorithm to detect the ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Magnetic and structural studies of (sn, ni –sn) substituted barium hexaferrites synthesized by ball milling
Samples of BaFe12-2x(SnSn)xO19 and BaFe12-2x(NiSn)xO19 were processed by high energy milling with 0 ≤ x ≤ 0.4 and 0 ≤ x ≤ 0.3 respectively. Sn2+-Sn4+ mixture considerably improved the saturation magnetization, Ms, (from ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Maintenance management program through the implementation of predictive tools and TPM as a contribution to improving energy efficiency in power plants
This paper presents an application method of a Maintenance Management Program through the implementation of predictive tools and the Total Productivity Maintenance (TPM) methodology as a contribution for the energy efficiency ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Major trends in the development of ankle rehabilitation devices
In this paper we review the ankle rehabilitation devices, both those that are already commercially available and those which are in the stage of development in laboratories and research centers. Also, a rehabilitation ...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. -
Managing relationships and communications in higher education efficiently through digital social networks: The importance of the relational coordination model
Digital social networks have proven to be of great support for organizations that are increasingly using new forms of social communication every day, seeking to improve their productivity and competitiveness. The main ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Manipulación de robots con base en posturas labiales
En este artículo se propone un nuevo método para el comando de tres grados de libertad de un robot manipulador, por medio de gestos de la boca. Las diferentes posiciones son registradas en secuencias de video, las cuales ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Manufacturing and evaluation of Chitosan, PVA and Aloe Vera hydrogels for skin applications
The aim of this research was to develop membranes of polyvinyl alcohol (PVA) and chitosan (CH), capable of absorbing an Aloe Vera solution and gradually releasing to accelerate wound healing. The methodology involved varying ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Manufacturing of a maxillofacial prosthesis from an axial tomography using simulation technologies with a virtual machine tool and four-axis machining
The surfaces of a personalized maxillofacial prosthesis were manufactured in a relatively short time with moderate cost. The topography of the surface was generated with a Computer-Aided Design system from a Computerized ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna. -
Mapping the region of instability for adiabatic continuation method
The pioneer schematic ideas of Kimura and Levenspiel (Ind. Eng. Chem. Proc. Des. Dev., 16 (1977) 145 – 148) have been developed to find numerically the region of instability for adiabatic packed bed reactors. Three different ...Universidad Nacional de Colombia Revistas electrónicas UN Dyna.
