Facultad de Ingeniería de Sistemas Computacionales: Recent submissions
Now showing items 41-60 of 191
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Measures for ETL processes models in data warehouses
(11/06/2009)processes take charge of extracting the data from data sources that would be contained in the data warehouse. Due to their relevance, the quality of these processes should be formally assessed since the early stages of ... -
Systematic review and comparison of modeling ETL processes in data warehouse
(08/23/2010)Abstract: In a Data Warehouse (DW), ETL processes (Extraction, Transformation, Load) are responsible for extracting, transforming and loading data from the data sources into the DW. A good design of these processes in the ... -
La robótica educativa, una herramienta para la enseñanza-aprendizaje de las ciencias y las tecnologías
(2012-07-04)En este artículo se presenta y analiza la robótica educativa como una herramienta de apoyo al proceso de enseñanza-aprendizaje, a nivel de pre-media, orientada principalmente a asignaturas complejas como la matemática, ... -
ETL Process Modeling Conceptual for Data Warehouses: A Systematic Mapping Study
(06/16/2011)BACKGROUND: A data warehouse (DW) is an integrated collection of subject-oriented data in the support of decision making. Importantly, the integration of data sources is achieved through the use of ETL (Extract, Transform, ... -
A family of experiments to validate measures for UML activity diagrams of ETL processes in data warehouses
(11/01/2010)In data warehousing, Extract, Transform, and Load (ETL) processes are in charge of extracting the data from the data sources that will be contained in the data warehouse. Their design and maintenance is thus a cornerstone ... -
Modelling ETL processes of data warehouses with UML activity diagrams
(11/09/2008)Extraction-transformation-loading (ETL) processes play an important role in a data warehouse (DW) architecture because they are responsible of integrating data from heterogeneous data sources into the DW repository. ... -
Automatic generation of ETL processes from conceptual models
(11/06/2009)Data warehouses (DW) integrate different data sources in order to give a multidimensional view of them to the decision-maker. To this aim, the ETL (Extraction, Transformation and Load) processes are responsible for extracting ... -
Sistema Nefelometrico Auto-referenciado Inmune a Fuentes de Luz Externas
(02/11/2018)Este trabajo describe los conceptos y procedimientos aplicados para el dise no e implementación de un sensor de turbiedad de agua. El mismo se dise na con la finalidad de brindarnos lecturas de turbiedad del agua. El sensor ... -
Time Division Multiplexing Fibre-Optic Liquid Level Sensors using a Nematic 1x2 Optical Switch
(09/01/2004)In this paper, time division multiplexing with optical switches in a multi-sensor system for level measurements with POF is reported. POF are used in the sensor heads and as transmission media along the optical network. ... -
Low power consumption silicon photonics tuning filters based on compound microring resonators
(03/14/2013)Scalable integrated optics platforms based on silicon-on-insulator allow to develop optics and electronics functions on the same chip. Developments in this area are fostered by its potential as an I/O technology that can ... -
Novel tuneable filter based on MZ and an amplified ring resonator for OFDM networks
(1999-11-08)A novel reconfigurable fibre based tuneable filter is proposed. The module relies on a cascaded connection of Mach-Zehnders and an amplified fibre ring resonator. MHz range adjustable FHWM bandwidths and high crosstalk are ... -
New optical filter employing multireflection mirror to provide design flexibility for WDMA
(2008-06-22)A novel optical device employing an amplified ring resonator and a multireflecting mirror inside, is presented. Is founded its transfer function. Also simple expressions for the separation of the two maximums of this novel ... -
Displays and Photonics Application Group Activities
(06/01/2004)Displays and Photonics Application Group (GDAF) is devoted to design and development of passive and active devices and sensors for their applications in WDM networks, CWDM, POF, and RF over fiber networks using different ... -
Applications of recirculating optical configurations on filters and lasers
(07/07/2005)In this paper, different optical configurations based on ring resonators and a reflective section in the feedback path, are proposed in order to show the feasibility of their applications in different fields. Additionally, ... -
Measurements on passive tunable optical filters for DWDM
(06/06/2002)Measurements on a passive optical fibre tunable filter are presented. The device is based on a loop mirror in a ring resonator. The loop mirror allows tuning by changing the coupling coefficient of a coupler. The novel ... -
Optical reconfigurable demultiplexer based on Bragg grating assisted ring resonators
(08/11/2014)A polarization independent reconfigurable optical demultiplexer with low crosstalk between adjacent channels and high number of potential allocated channels is designed on silicon on insulator technology. On to off state ... -
Wide tunable filters using a recirculating delay line with multi-reflections
(05/01/2002)A ring resonator with multiple reflections as a tunable filter is proposed and analyzed in this paper. A coupler and two identical Bragg gratings are used to implement the internal reflections so an active filter with a ... -
Demultiplexers for ultranarrow channel spacing based on Mach-Zehnders and ring resonators
(09/01/2004)Novel demultiplexer configurations based on concatenated Mach-Zehnders and a ring resonator are presented. These new devices exhibit high channel isolation, flexibility, no loss, and megahertz-adjustable full width at half ... -
A plastic fiber optic liquid level sensor
(06/09/2004)A system for measuring liquid level in multiple tanks using optical fiber technology has been developed. Oil field service industry or any sector requiring liquid level measurements in inflammable atmospheres can be benefited ... -
Synthesis of optical filters using microring resonators with ultra-large FSR
(12/06/2010)We propose a novel synthesis method for designing flexible, tunable non-periodic filters. It is based on a building block which is presented by first time for these purposes, being the poles position tuned by means of a ...