José Carlos Lopez-Ardao

Dr. José Carlos Lopez-Ardao

atlanTTic Research Center, Universidade de Vigo
orcid

Research Focus & Metrics

Academic Career Length

27Years (2000-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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23 June 2021 in Sensors
Verified
Journal Article
Open access
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José Carlos Lopez-ArdaoJosé Carlos Lopez-Ardao
José Carlos Lopez-Ardao
RRRAUL RODRIGUEZ-RUBIO
RAUL RODRIGUEZ-RUBIO
Andrés Suárez-GonzálezAndrés Suárez-González
Andrés Suárez-González
Miguel Rodríguez PérezMiguel Rodríguez Pérez
Miguel Rodríguez Pérez
MVMaría Estrella Sousa Vieira
María Estrella Sousa Vieira
The issue of energy balancing in Wireless Sensor Networks is a pivotal one, crucial in their deployment. This problem can be subdivided in three areas: (i) energy conservation techniques, usually implying minimizing the cost of communication at the nodes since it is known that the radio is the biggest consumer of the available energy; (ii) energy-harvesting techniques, converting energy from not full-time available environmental sources and usually storing it; and (iii) energy transfer techniques, sharing energy resources from one node (either specialized or not) to another one. In this article, we survey the main contributions in these three areas and identify the main trending topics in recent research. A discussion and some future directions are also included.

1 April 2000 in ACM Transactions on Modeling and Computer Simulation
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Journal Article
Open access
José Carlos Lopez-ArdaoJosé Carlos Lopez-Ardao
José Carlos Lopez-Ardao
CLCándido López-García
Cándido López-García
ASAndrés Suárez-González
Andrés Suárez-González
Manuel Fernández-VeigaManuel Fernández-Veiga
Manuel Fernández-Veiga
RRRAUL RODRIGUEZ-RUBIO
RAUL RODRIGUEZ-RUBIO
Several recent traffic measurement studies have convincingly shown the presence of self-similarity in modern high-speed networks, involving a very important revolution in the stochastic modeling of traffic. Thus the use of self-similar processes has opened new problems and research fields in network performance analysis, mainly in simulation studies, where the efficient synthetic generation of sample paths (traces) corresponding to self-similar traffic is one of the main topics. In this article, we justify the selection of interarrival time instead of counting processes for modeling arrivals. Also, we discuss the advantages and drawbacks of the most important self-similar processes when applied to traffic modeling in simulation studies, proposing the use of models based in F-ARIMA, mainly due to their flexibility to capture both long- and short-range correlations. However, F-ARIMA processes have been little used in simulation studies, mainly because the synthetic generation methods available in the literature are very inefficient compared with those for FGN. In order to solve this problem, we propose a new method that can generate high-quality traces corresponding to a F-ARIMA(p, d, q) process. A comparison with existing methods shows that the new method is significantly more efficient, and even slightly better than the best method for FGN.

26 May 2016 in Computer Applications in Engineering Education
Verified
Journal Article
Closed access
PDF file
MVMaría Estrella Sousa Vieira
María Estrella Sousa Vieira
José Carlos Lopez-ArdaoJosé Carlos Lopez-Ardao
José Carlos Lopez-Ardao
Manuel Fernández-VeigaManuel Fernández-Veiga
Manuel Fernández-Veiga
Miguel Rodríguez PérezMiguel Rodríguez Pérez
Miguel Rodríguez Pérez
Sergio Herrería-AlonsoSergio Herrería-Alonso
Sergio Herrería-Alonso

28 August 2013 in IEEE Transactions on Broadcasting
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Journal Article
Closed access
JJJose Joskowicz
Jose Joskowicz
RSRafael Sotelo
Rafael Sotelo
José Carlos Lopez-ArdaoJosé Carlos Lopez-Ardao
José Carlos Lopez-Ardao
During the last few years, different parametric models were proposed for video quality estimation. Each model uses different parameters as inputs, such as bit rate, frame rate and percentage of packet loss, and each model was designed and tested by their authors for a particular codec, display resolution and/or application. This paper presents a review of the parametric models published by ten different groups of authors. Each model is briefly described, and the relevant parametric formulas are presented. The performance of each model is evaluated and contrasted to the other models, using a common video clips set, in different coding and transmission scenarios. Based on the results, a new and more general parametric model is presented, which takes into account bit rate, frame rate, display resolution, video content and the percentage of packet loss.

1 February 2002 in Performance Evaluation
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Journal Article
Closed access
Andrés Suárez-GonzálezAndrés Suárez-González
Andrés Suárez-González
José Carlos Lopez-ArdaoJosé Carlos Lopez-Ardao
José Carlos Lopez-Ardao
CLCándido López-García
Cándido López-García
Manuel Fernández-VeigaManuel Fernández-Veiga
Manuel Fernández-Veiga
RRRAUL RODRIGUEZ-RUBIO
RAUL RODRIGUEZ-RUBIO
MVMaría Estrella Sousa Vieira
María Estrella Sousa Vieira

27 December 2021 in Applied Sciences
Verified
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Open access
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MVMaría Estrella Sousa Vieira
María Estrella Sousa Vieira
DFDavid Ferrero-Castro
David Ferrero-Castro
José Carlos Lopez-ArdaoJosé Carlos Lopez-Ardao
José Carlos Lopez-Ardao
Badges are non fungible tokens used to document or certify achievements in academics or in any other domain. Besides their utility as proof of achievement, badges are of interest in higher education as pure incentives to push the students and learners in general toward pursuing well-defined goals and skills. In this respect, badges can be naturally incorporated into digital learning platforms also as part of informal learning activities, and stimulate participation, merit, and visibility for the students. However, the level of engagement of learners into these learning activities depends crucially on how the system of badges and rewards has been designed and on how it is applied, if it is to be used effectively. In this paper, we report on the design and implementation of a smart badges system, and an example of its use inside a gamification methodology for informal learning in a master level course, and discuss the benefits and the observed gains in learning performance that can be obtained.