Ferney Amaya-Fernández

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Verified

Ferney verified their affiliation via an institutional email.

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• PhD
• Professor at Pontifical Bolivarian University

En una era donde la tecnología y la ciencia están en constante avance, formar a los docentes en educación STEM les permite preparar a los estudiantes para los trabajos del futuro. En el artículo se presenta la primera fase del estudio Ambientes de aprendizaje para la integración disciplinar bajo el enfoque STEM apoyados por tecnologías digitales, e...

En una era en la que la tecnología y la ciencia están en constante avance, formar docentes en educación STEM es crucial para la preparación de los estudiantes en función de los trabajos del futuro. El artículo describe el diseño e implementación de una metodología formativa para integrar la educación STEM en establecimientos educativos de básica y...

Exposome studies are advancing in high-income countries to understand how multiple environmental exposures impact health. However, there is a significant research gap in low- and middle-income and tropical countries. We aimed to describe the spatiotemporal variation of the external exposome, its correlation structure between and within exposure gro...

Background Air pollution contains a mixture of different pollutants from multiple sources. However, the interaction of these pollutants with other environmental exposures, as well as their harmful effects on children under five in tropical countries, is not well known. Objective This study aims to characterize the external exposome (ambient and in...

En este trabajo se presenta la implementación de un sistema para el monitoreo de movimientos de tierra en masa conformado por un prototipo de perfil del suelo, una red de sensores fotónicos basados en rejillas de Bragg y un sistema de interrogación. El prototipo del suelo fue reproducido mediante materiales poliméricos que representan las capas del...

En este trabajo de investigación se llevó a cabo la transmisión de señales OFDM, basadas en el estándar 5G New Radio, con el fin de establecer qué tanto los impedimentos óptico-inalámbricos afectan la comunicación en un escenario de transmisión de radio-sobre-fibra. Con el software Matlab se hicieron análisis cualitativo y cuantitativo de las degra...

We aim to establish the relationship between the stakeholders who are part of the Open-Access Ecosystem (OAE). The study was developed from an ecosystem approach, analyzing the actors and their relationships. As a result, we proposed a simplified view of the main components of an OAE and the relationships between them, which could be useful for und...

In this work, we present an interferometric polymer-based electro-optical device, integrated with an embedded double-monolayer graphene capacitor for biosensing applications. An external voltage across the capacitor applies an electric field to the graphene layers modifying their surface charge density and the Fermi level position in these layers....

Los Gobiernos están dirigiendo esfuerzos que permiten la modernización de su administración pública y la consolidación de Estados abiertos, transparentes y eficientes. En este escenario, los datos abiertos son una estrategia que ayuda a lograr estos objetivos, mejorando la interacción con la sociedad, a través de la generación de valor social, públ...

Radio-over-fiber is a cost-effective support for the forthcoming 5G developments aimed to fulfill the ever-increasing demand for information. However, such systems are limited by transmission impairments that reduce the quality of communication. To enhance the system performance, an adaptive decision-feedback equalizer based on the least mean squar...

Objetivo Analizar el impacto de la contaminación del aire por material particulado PM2,5 y su relación con el número de asistencias a entidades de salud por enfermedades respiratorias por medio de analítica de datos. Métodos Se analizaron datos del Área Metropolitana de Medellín, Colombia, ciudad ubicada en un valle estrecho densamente poblado e i...

Las Instituciones de Educación Superior (IES) generan datos, información y conocimiento, por lo cual se consideran actores claves en los ecosistemas de datos abiertos. En este contexto, la apertura de datos es una estrategia que apoya al acceso a la información y a la relación de las universidades con el entorno. El objetivo de este artículo es est...

This document presents the results of an investigation carried out in order to know the characteristics of the data published by the municipalities that make up the Aburra Valley in Antioquia and its relationship with the strategic issues defined by the national government in terms of open data. To obtain the results, a methodology defined consisti...

Public entities have high volumes of stored government data that serve as a source of information for their management, improve the provision of services and interaction with the community, generating social and economic value. Some public administrations, despite being interested in opening the data, have faced obstacles to disseminate them, espec...

Composite materials have been extensively used on new aircraft airframes because of their advantages over metallic materials. This represents a difficulty for damage detection, a vital task for safety on the aerospace industry, as most nondestructive testing techniques are not effective on these materials since those usually present internal failur...

El formato de modulación QPSK junto a la compensación electrónica es una alternativa para incrementar la capacidad y alcance en las redes ópticas pasiva de próxima generación (NG-PON), en respuesta a la demanda de servicios y aplicaciones. En este documento se presenta la comparación mediante simulaciones del desempeño de dos técnicas de compensaci...

QPSK modulation format with electronic compensation is an alternative to increase the capacity and reach in the next generation passive optical networks (NG-PON), in response to demanding services and applications. We perform simulations to compare the performance of two electronic compensation techniques Constant Modulus Algorithm (CMA) and Backpr...

In this paper, we propose a hybrid wireless mesh network infrastructure which connects the smart meters of each consumer with the data aggregation points (DAP). We suppose a set of smart meters that need to send information, and receive information from a central office on electrical enterprises, employing the meter data management system (MDMS), a...

RESUMEN En este documento se presenta una metodología que busca impulsar el desarrollo de ciudades inteligentes y sostenibles en Colombia. En forma general, la metodología consta de dos fases: fase diagnóstico y fase de seguimiento y evaluación. En la fase de diagnóstico, la metodología propone seis pasos en los cuales los dirigentes de una ciudad...

The continued increase in the capabilities and performance in fiber optic networks today require more robust network designs to allow high consumption of information and thus enable users to have greater capacity and data content. That's why we in the task of analyzing and implementing the concept of flexible optical networks to optimize the use of...

En este documento se analizaron los efectos lineales y no lineales introducidos por la fibra óptica en un sistema de transmisión WDM-PON utilizando el formato de modulación DPSK. El análisis se basó en el impacto del ancho de línea del láser sobre el BER para diferentes velocidades de transmisión, potencia transmitida y coeficientes de dispersión d...

In this paper we analyze the impact of the linewidth over the performance of an optical link in an optical access network that employs the DPSK modulation format. We use simulations to measure the BER when the linewidth of the optical transmitter changes. We analyze the link performance with different data bit rates and different dispersion values...

Nowadays the data and wireless traffic have been increased more than predicted. Actual telecommunication network architectures are not scalable technically or economically achievable. Hence, in this proposal we present the use of Radio over Fiber as an alternative solution for the new generation of wireless and wired networks for future application...

In this work, we propose a novel methodology for scalability in Fiber↔Wireless (FiWi) hybrids networks that has four stages, for other hand, there is great uncertainty in population growth trend of users and their generated demand this takes great care when making the allocation of resources.

When you have to choose what type of modulation is selected for an optical system, you must also decide the type of receptor to use and the cost benefit of its use. This paper presents the evaluation of two formats (BPSK and DPSK) with coherent detector and coherent differential detector for each format respectively, in order to determine which of...

With the increasing amount of information that is demanding by fixed and mobile users through the multiservice networks, the deployment of the optical segment in the access network is a critical issue, with impact in the cost and performance of the overall network. While TDM-Passive optical network (PON) is standardized, hybrid WDM/TDM-PON is now c...

In this document, we present the modeling of an optical channel solving the Non Linear Schrödinger Equation (NLSE). We present two alternatives to solve the NLSE: the analytical solution and the numerical solution with the Split–Step Fourier Transform method. In the simulation, we consider the linear effects, such as the chromatic dispersion, and t...

Space division multiplexing in multicore fibers is one of the most promise technologies in order to support transmissions of next-generation peta-to-exaflop-scale supercomputers and mega data centers, owing to advantages in terms of costs and space saving of the new optical fibers with multiple cores. Additionally, multicore fibers allow photonic s...

The increasing demand of network traffic requires new research centers; improve their communications networks, due to the excessive use of mobile and portable devices wanting to have greater access to the network by downloading interactive content quickly and effectively. For our case analyze optical network link through simulation results assuming...

The increased bandwidth required by applications, tends to raise the amount of optical equipment, for this reason, it is essential to maintain a balance between the wavelength allocation, available capacity, number of optical devices, so that achieve the lowest power consumption Optical green to work with. You could say that we propose a model that...

In this paper, we show numerical simulations for analyzing spatially multiplexed systems based on orthogonal frequency division multiplexing and multiple-input multiple-output Alamouti code in order to compare the performance of the transmission in a two-core fiber with low coupling, and in few-mode fiber with high differential group delay. These n...

Nowadays, one of the main unanswered questions is related to the production and use of electricity because it is expected an increase in the cost of generation, including the Andean Countries. Reason given, this article presents an analysis of the problems that the configurations of Electric Systems of Modern Potency entail. Furthermore, some impor...

The increasing demand of fixed and mobile applications, and considering that smart grid imposes new requirements to the access networks, in this paper we present an optical access architecture to support home multiservice including smart grid applications. We propose a migration path based in a WDM passive optical network (PON) architecture for the...

In this paper, we show a novel pilot-aided phase channel estimation approach based on theoretical relation between chromatic dispersion and coherence bandwidth, for pilots allocation in an symbol multiplexed by orthogonal frequency division multiplexing and transmitted to optical fiber system. The method is implemented on Matlab® to make a linear i...

The study of the propagation effects that currently limit the performance of optical communication networks, allows implementing techniques that increase the capacity such as optical phase modulation and digital signal processing compensation. In this article we analyze the chromatic dispersion and nonlinearities for intensity and phase modulated s...

In this paper we present a comparison of the peak to average power ratio (PAPR) between ortogonal frequency division multiplexing (OFDM) based on fast Fourier transform (FFT) and Fast-OFDM (FOFDM) based on discrete cosine transform (DCT). It is shown that although the probability of PAPR is slightly higher for systems using the discrete cosine tran...

In this paper we discuss Split - Step Fourier and Finite Difference methods to solve the nonlinear Schrödinger equation (NLSE), including dispersion and Kerr's effect analysis in a pulse across a single mode optical fiber. To accomplish this analysis, we start from Maxwell's equations and optical channel simplifications necessary to find the NLSE.

This paper presents a study (simulations) of coupling losses between adjacent waveguides made of tellurite glasses. These waveguides are designed to perform parametric amplifiers (PAs). PAs have some advantageous characteristics over the other optical amplifiers: they have broadband amplification bandwidth (depending on the dispersive characteristi...

In this paper we present performance results of a Gigabit-Passive Optical Network (G-PON) for different alternatives of implementation with data bit rates of 1.25, 2.5 and 10 Gbps in the downlink. The presented results allow to determine the kind of transmitter and receiver to use affecting the implementation cost of the access network.

This paper present a numerical simulation study of bending loss in planar optical waveguides, at wavelengths around 1550 nm, using the Beam Propagation Method (BMP), for the purpose to reduce the physical size of photonic components and for the design of on-chip optical components for communication systems.

This paper we analyzed three alternatives for optical amplification used to extend the reach of optical fiber link for the transport of RoF (Radio over Fiber) in view of 54 MHz RF signals for wireless applications.

In this paper we present comparative performance results of optical amplification alternatives, employed to extend the reach of the optical link for the transport of RoF (Radio over Fiber) signals for wireless applications.

In this work we present a model for the design and optimization of the video distribution link in the next generation optical access network. We analyze the video distribution performance in a SCM-WDM link, including the noise, the distortion and the fiber optic nonlinearities. Additionally, we consider in the model the effect of distributed Raman...

We propose a passive optical network architecture based on coherent detection for converged delivery of broadcast services from a dedicated remote broadcast server and user-specific services from a local central office. We experimentally demonstrate this architecture with mixed traffic types, wavelength division multiplexed, unicast channels compos...

Several issues in the design and optimization of the next generation optical access network (NG-OAN) are presented. The noise, the distortion and the fiber optic nonlinearities are considered to optimize the video distribution link in a passive optical network (PON). A discussion of the effect of the optical amplification in the performance of the...

We report on a scalable and enhanced power budget radio-over-fibre system for hybrid-wireless access networks operating at 12.5 GHz DWDM spacing for 5 GHz RF carriers over a 60 km fibre link with Raman amplification.

Highest reported bit rate of 2.5 Gbit/s for optically phase modulated radio-over-fibre link employing coherent detection is demonstrated. Demodulation of 3middot2.5 Gbit/s QPSK modulated WDM channels, is achieved after 79 km of transmission through deployed fiber.

A distributed fibre Raman amplified long reach optical access feeder link using a reflective semiconductor optical amplifier in the remote base station is experimentally demonstrated for supporting WiMAX-over-fibre transmission. The measured values for the error vector magnitude for quadrature phase shift keying and 16-ary quadrature amplitude modu...

The merging of access and metro networks has been proposed as a solution to lower the unit cost of customer bandwidth. This paper reviews some of the recent advances and challenges in extended-reach optical access networks.

The merging of access and metro networks has been proposed as a solution to lower the unit cost of customer bandwidth. This paper reviews some of the recent advances and challenges in extended-reach optical access networks.

Resumen— En este documento se presenta una herramienta computacional que permite simular la subcapa dependiente del medio para el sentido de retorno especificada en DOCSIS 3.0 para redes HFC. La herramienta desarrollada permite obtener un mayor entendimiento de la capa física especificada en DOCSIS y permite obtener algunos parámetros de desempeño...

This article presents the design of a baseband processor for software radio, which uses carrier synchronizer and bit detector-synchronizer circuits based on algorithms implemented in hardware, and an inverse tangent circuit based on the CORDIC algorithm. In this case, the functional blocks of the processor can be reconfigured to support multiple mo...

Este artículo presenta el diseño de la tangente inversa usando el algoritmo CORDIC. El diseño se realizó usando descripción estructural en VHDL y fue sintetizado en el circuito FPGA XC3S200 usando el ambiente Xilinx ISE 7.1. Con el propósito de verificar el funcionamiento de la tangente inversa, se diseñó como vehículo de test un detector de fase,...

Resumen Las comunicaciones que utilizan como medio de transmisión la infraestructura de las instalaciones eléctricas, no son nada nuevas y su implementación no ha tenido el auge que muchos expertos habían vaticinado. Con la reciente publicación del Estándar IEEE 1901 (Diciembre de 2010), se abre un nuevo panorama para esta tecnología que al combina...