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Recurso libre

Experimental data on SOA formation from mixtures of anthropogenic and biogenic organic compounds, Experimental data on SOA formation from mixtures of anthropogenic and biogenic organic compounds
García Vivanco, Marta - Santiago, Manuel; CIEMAT - Sánchez, Miguel; CIEMAT - Clavero, Mª Ángeles; CIEMAT - Borrás, Esther; CEAM - Ródenas, Milagros; CEAM - Alacreu, Francisco; CEAM - Vázquez, M.; CEAM - Clemente, E.; CEAM - Porras, R.; CEAM - Muñoz, A.; CEAM - Stein, Ariel; NOAA

Formato:	,
Enlaces:	Secondary organic aerosols (SOA) constitute a significant fraction of the atmospheric particulate matter. Theses particles are formed as a consequence of the oxidation reaction of certain organic gases that leads to the formation of low-volatility compounds. As for other pollutants,…
Fecha:	2012-12-14
Recurso:	Revistas UNAM

Recurso libre

Total organic carbon removal from a chemical lab’s wastewater using Fenton’s reagent, Remoción de Carbono Orgánico Total en aguas residuales provenientes de laboratorio químico, empleando reactivo Fenton
Martínez Ávila Oscar Mauricio ; Universidad Nacional de Colombia - sede Bogotá - Franco José Herney Ramírez ; Universidad Nacional de Colombia - Toledo Reyes Magda Lorena ; Universidad Nacional de Colombia

Formato:	, , ,
Enlaces:	Treating industrial wastewater represents a serious problem nowadays; it requires a strong understanding of the particular systems and (in most of cases) ad hoc solutions. This work describes the use of Fenton’s reagent (reaction between H2O2 and Fe(II)) for removing…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

Editorial, Editorial
Narváez Rincón Paulo César ; Universidad Nacional de Colombia

Formato:	, , ,
Enlaces:	Este número, el segundo del volumen 33, incluye doce artículos que, como en el número anterior, corresponden a áreas diferentes de la ingeniería. El medio ambiente, los materiales, sismicidad y la ingeniería de software son algunos de los temas que…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

Ceramic bricks made from municipal solid waste incineration-derived clay and ashes: a quality study, Estudio de calidad de ladrillos cerámicos producidos con mezclas de arcilla y cenizas de incineración de residuos sólidos municipales
García Ubaque César Augusto ; Universidad Distrital Francisco José de Caldas - González Hässig Andrés ; Regeneración Ltda. - Vaca Bohórquez Martha Lucía ; Adviser

Formato:	, , ,
Enlaces:	This paper presents analytical data from tests on bricks made from different clay/ash mixtures. The ashes used were obtained from a Hoffmann-type brick-making furnace equipped for coal and municipal solid waste co-firing. The bricks were physically and chemically characterised and…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

LDPE and PP thermal diffusivity in molten state, Difusividad térmica de mezclas de LDPE y PP en estado fundido
Yánez Genhli ; Universidad Nacional de Colombia - Rodríguez Pérez Miguel Ángel ; Universidad de Valladolid - Almanza Ovidio ; Universidad Nacional de Colombia

Formato:	, , ,
Enlaces:	Experimental results are reported for measuring the thermal diffusivity of two polymer species: low density polyethylene (LDPE) and polypropylene (PP). Measurements were taken in unsteady state heat flow conditions around the materials' melting temperature, using a device specially constructed for…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

AlN film deposition as a semiconductor device, Deposición de películas de AlN como dispositivos semiconductores
Caicedo Julio Cesar ; Universidad del Valle - Pérez Taborda Jaime Andrés ; Universidad Tecnológica de Pereira - Chaparro Willian Aperador ; Universidad Militar Nueva Granada

Formato:	, , ,
Enlaces:	AlN films were deposited by pulsed laser deposition (PLD) using an Nd: YAG laser (λ = 1064 nm). The films were deposited in a nitrogen atmosphere as working gas; the cathode was an aluminium high purity (99.99%) target. The films…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

Characterising μ-AlTiN coating and assessing its performance during Ti-6Al-4V milling, Caracterización y desempeño del recubrimiento μ-AlTiN durante el fresado del Ti-6Al-4V
Moreno Téllez Carlos Mauricio ; Universidad Pedagógica y Tecnológica de Colombia - UPTC - Sánchez José Manuel ; Centro de Estudios e Investigaciones Técnicas de Guipúzcoa and Universidad de Navarra - Higuera Cobos Oscar Fabián ; Universidad Pedagógica y Tecnológica de Colombia - UPTC

Formato:	, , ,
Enlaces:	This study investigated the mechanical properties and performance of μ-AlTiN coating deposited by PVD cathodic arc technique for a specific Al0, 67Ti0, 33N composition deposited on a WC-Co and AISI D2 steel substrate. The structure of the coating was analysed…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

A review of conceptual transparency in US and Colombian seismic design building codes, Revisión de la Transparencia Conceptual en los Reglamentos de Diseño Sísmico de Edificios en EU y Colombia
Carrillo Julian ; Universidad Militar Nueva Granada - Blandón Valencia John ; Universidad Nacional de Colombia - sede Medellín - Rubiano Astrid ; Universidad Militar Nueva Granada

Formato:	, , ,
Enlaces:	The goal of re-examinination of seismic design codes is aimed at making their provisions as transparent as possible for users so that the design would be clear and enriching for structural engineers. This paper presents a transparency evaluation of the…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

Urban air pollution in school-related microenvironments in Bogota, Colombia, Caracterización de la Calidad del Aire en Microambientes de Colegios Distritales en Bogotá
Franco Juan Felipe ; Universidad EAN - Rojas Néstor Yesid ; Universidad Nacional de Colombia - Sarmiento Olga Lucía ; Universidad de los Andes - Behrentz Eduardo ; Universidad de los Andes

Formato:	, , ,
Enlaces:	Particle-related pollution (PM10, PM2.5 and soot) was measured in both indoor and outdoor microenvironments at four public elementary schools in Bogota, Colombia. Three of these schools were located alongside major urban roads in which different types of public transit systems…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

10.

Developing high-performance concrete incorporating highly-reactive rice husk ash, Producción de Concretos de Alto Desempeño Mediante la Incorporación de Ceniza de Cascarilla de Arroz de Alta Reactividad
Salas Andrés ; Universidad Nacional de Colombia - Delvasto Silvio ; Universidad del Valle - Mejía de Gutiérrez Ruby ; Universidad del Valle

Formato:	, , ,
Enlaces:	The aim of this study is to present results of an investigation about the developing of a highperformance concrete (HPC) using a highly reactive pozzolan made from chemically treated rice husk ash (ChRHA) prepared by a chemical-thermal attack to the…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

11.

An optimal algorithm for estimating angular speed using incremental encoders, Un algoritmo óptimo para la aproximación de la velocidad angular utilizando encoders
Rairán Antolines José Danilo ; Universidad Distrital Francisco Jose de Caldas

Formato:	, , ,
Enlaces:	This paper proposes a new algorithm using signals from an incremental encoder for estimating a rotating shaft's speed. This algorithm eliminated the oscillations appearing in classical fixed-time and fixed-space algorithms, even when speed was constant. A fixed-time algorithm measures angular…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

12.

Using radio frequency and ultrasonic antennas for inspecting pin-type insulators on medium-voltage overhead distribution lines, Aplicación de antenas de radiofrecuencia y ultrasónica para la inspección de los aisladores de tipo pin en líneas aéreas de distribución de media tensión
Lefort Borges Cícero ; High Voltage Laboratory of the Federal University of Itajubá (LAT-EFEI) - Barreira Martinez Manuel Luís ; High Voltage Laboratory of the Federal University of Itajubá (LAT-EFEI)

Formato:	, , ,
Enlaces:	This paper summarises the activities undertaken when using antennas (ultrasound and radiofrequency) for identifying insulators in pre-failure state by detecting the noise emitted by the distribution line and correlating this with these insulators (porcelain pin type) dielectric breakdown. This has…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

13.

Towards a framework for deriving platform-independent model-driven software product lines, Hacia un Marco de Trabajo para Derivar Líneas de Producto de Software Dirigidas por Modelos Independientes de la Plataforma
Paz Andrés ; Universidad ICESI - Arboleda Hugo ; Universidad ICESI

Formato:	, , ,
Enlaces:	Model-driven software product lines (MD-SPLs) are created from domain models which are transformed, merged and composed with reusable core assets, until software products are produced. Model transformation chains (MTCs) must be specified to generate such MD-SPLs. This paper presents a…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

14.

An academic value-added mathematical model for higher education in Colombia, Un modelo matemático para el valor académico agregado: Caso de la educación superior en Colombia
Bogoya José Daniel ; Universidad Jorge Tadeo Lozano - Bogoya Ramírez Johan Manuel ; Universidad Javeriana

Formato:	, , ,
Enlaces:	The concept of academic added-value can be associated with a variation in the cognitive development of students who complete an educational cycle at a given institution belonging to a reference universe, related to the tendency shown by all students in…
Fecha:	2013-08-14
Recurso:	Ingeniería e investigación

Recurso libre

15.

Study of near surface boundary layer characteristics during pre-monsoon seasons using micrometeorological tower observations, Study of near surface boundary layer characteristics during pre-monsoon seasons using micrometeorological tower observations
Chaudhuri, Sutapa; Department of Atmospheric Sciences, University of Calcutta, India - Middey, Anirban; Department of Atmospheric Sciences, University of Calcutta, India

Formato:	,
Enlaces:	Studying the boundary layer is imperative because severe weather in this portion of the atmosphere impacts on environment and various facets of national activities and affects the socioeconomic scenario of a region. Near surface boundary layer characteristics are investigated through…
Fecha:	2012-12-14
Recurso:	Revistas UNAM

Recurso libre

16.

Integrating the development of data mining and data warehouses via model-driven engineering
Zubcoff Vallejo, José Jacobo - Pardillo Vela, Jesús - Mazón López, José Norberto - Trujillo Mondéjar, Juan Carlos

Formato:	info:eu-repo/semantics/article
Enlaces:	Data mining is one of the most important analysis techniques to automatically extract knowledge from large amount of data. Nowadays, data mining is based on low-level specifications of the employed techniques typically bounded to a specific analysis platform. Therefore, data…
Fecha:	2012-03-08
Recurso:	RUA Docencia

Recurso libre

17.

Evolution of product line architectures
Amaolo, Marcelo Paulo

Formato:	Objeto de conferencia, Objeto de conferencia
Enlaces:	Product-line architectures, i.e. a software architecture and component set shared by a family of products, represents a promising approach to achieving reuse of software. Several companies are initiating or have recently adopted a product-line architecture. However, little experience is available…
Fecha:	2012-09-25
Recurso:	Unversidad Nacional de La Plata