Search results for "video"
showing 10 items of 1348 documents
Remote photoplethysmography for skin perfusion monitoring using narrowband illumination
2019
The purpose of this study was to determine potential of remote photoplethysmography for skin perfusion monitoring, using 540 nm narrowband and 530 nm broadband illuminations. The alterations of cutaneous circulation were produced by topical skin heating protocol. The setup comprises of 530 nm LED light source and two identical cameras operated simultaneously: one equipped with narrowband optical filter (CWL=540nm), and another without filter. Results demonstrate the typical heating test response curve- comprising first peak, nadir and plato phase, which were significantly different in narrowband and broadband illumination. It was concluded that selection of optimal light source parameters i…
Automatic EMI filter design for power electronic converters oriented to high power density
2018
In this paper, a complete computer aided procedure based on the power density concept and aimed at the automatic design of EMI filters for power electronic converters is presented. It is rule-based, and it uses suitable databases built-up by considering information on passive components available from commercial datasheets. The power density constraint is taken into consideration by imposing the minimization of the filter volume and/or weight; nevertheless, the system in which the automatically designed filter is included satisfies the electromagnetic compatibility standards limits. Experimental validations of the proposed procedure are presented for two real case studies, for which the per…
Computer Aided Optimal Design of High Power Density EMI Filters
2016
Power density of power converter systems is becoming an increasingly stringent design constraint for a wide range of applications. Size reduction of EMI filter in power converters is an important aspect due to its significant impact on the overall converter volume and weight. In order to take on this issue, a computer aided procedure for a fast selection of optimal discrete EMI filter components and configuration is described in this paper. The proposed technique is a rule-based automatic procedure based on suitable databases that consider datasheets information of commercially available passive components (e.g. magnetic cores, capacitors). It allows the minimization of the filter's volume …
Guidance Provided by Teacher and Simulation for Inquiry-Based Learning: a Case Study
2016
Current research indicates that inquiry-based learning should be guided in order to achieve optimal learning outcomes. The need for guidance is even greater when simulations are used because of their high information content and the difficulty of extracting information from them. Previous research on guidance for learning with simulations has concentrated on guidance provided by the simulation. Little research has been done on the role of the teacher in guiding learners with inquiry-based activities using simulations. This descriptive study focuses on guidance provided during small group investigations; pre-service teachers (n = 8) guided third and fifth graders using a particular simulatio…
Design of EMI Filters Using Multi-Objective Optimization
2018
A multi-objective design procedure for EMI filters in power converters is proposed. In a first step, the results obtained by an automatic design of EMI filters for power electronic converters oriented to satisfy the electromagnetic compatibility standards and the power density constraint which impose the minimization of the filter volume and/or weight, are evaluated. In a second step, the power losses and the cost related to the EMI filter configurations are estimated. By using the dominance concept, the EMI filter designs which are part of the Pareto front are selected among a discrete set of feasible configurations. Therefore, the configurations of the Pareto front take into consideration…
Analysing participatory video through the capability approach. A case study in Quart de Poblet (Valencia, Spain)
2017
The aim of this paper is to analyse participatory video as a participatory action research method through the lenses of the capability approach. In order to do this, we used a participatory video experience that took place in the municipality of Quart de Poblet (Valencia, Spain) from February to March 2014. The participants were 11 young people between 16 and 24 years of age, severely affected by the economic crisis that has hit Spain in recent years. To develop our analysis, we introduced the participatory video as a technique and a process within the participatory action research methods. Then, we analysed the participatory process to verify the extent to which it had contributed to expan…
Nuevas fórmulas publicitarias: los advergames como herramienta de las comunicaciones de marketing
2012
Los advergames son videojuegos orientados a la comunicación publicitaria. Su naturaleza de mensaje híbrido, al combinar contenido publicitario y contenido de entretenimiento, aporta interesantes posibilidades al desarrollo de comunicaciones de marketing en un entorno mediático en el que la publicidad tradicional ha ido perdiendo eficacia. El presente artículo delimita el concepto de advergame, analizando las diferentes tipologías existentes y sus efectos sobre diversos objetivos de marketing y de comunicación. Asimismo, se apuntan algunas recomendaciones a la hora de desarrollar comunicaciones de marketing mediante advergames, así como las cuestiones éticas y morales que deben considerarse
La alteridad en el discurso de la ciencia ficción : identidad y desarraigo en Beforeigners (HBO: 2019- )
2021
La representación del miedo hacia el Otro ha sido una de las temáticas más recurrentes en el género de la ciencia ficción. En esta línea, esta investigación articula un análisis de la serie noruega Beforeigners en torno al discurso de la identidad. Desde una perspectiva cualitativa, se ha realizado un análisis textual que ha puesto de manifiesto que en la serie prevalecen los valores comunitarios y solidarios. En la discusión se han contrapuestos los resultados con otras series del género y se ha evidenciado que la serie rompe con las narrativas típicas de la ciencia ficción. Asimismo, se destaca el tono crítico de la serie hacia las políticas de inmigración de la Unión Europea. The portray…
Audio, video plūsmu kvalitātes novērtēšana
2018
Bakalaura darbā tiek apskatītas audio un video kvalitātes novērtēšanas iespējas zvanam, kas pārraidīts IP tīklā (VoIP). Darbā tiek izstrādāts risinājums zvana kvalitātes noteikšanai, izmantojot Twilio audio un video pārraides servisu, serviss nodrošina arī servera pusē saņemtā signāla ierakstu. Risinājuma pamatā ir go valoda un automātiskais tests, kas veic Nightwatch testa skripta izpildi uz Docker izveidotas sesijas, ar JavaScript nodrošinot automātisku pieslēgšanos zvana istabai un sarunas ierakstīšanu. Go valoda izpilda termināļa komandas un veic pieprasījumus un to apstrādi. Vērtēšana tiek veikta, izmantojot PEXQ algoritmu. Risinājums ir unikāl…
Hybrid CPU/GPU Acceleration of Detection of 2-SNP Epistatic Interactions in GWAS
2014
This is a post-peer-review, pre-copyedit version of an article published in Lecture Notes in Computer Science. The final authenticated version is available online at: https://doi.org/10.1007/978-3-319-09873-9_57 [Abstract] High-throughput genotyping technologies allow the collection of up to a few million genetic markers (such as SNPs) of an individual within a few minutes of time. Detecting epistasis, such as 2-SNP interactions, in Genome-Wide Association Studies is an important but time consuming operation since statistical computations have to be performed for each pair of measured markers. In this work we present EpistSearch, a parallelized tool that, following the log-linear model appr…