Juan M. Orduña

University of Valencia | UV · Department of Informatics

The fight against sexism is nowadays one of the flagship social movements in western countries. Adolescence is a crucial period, and some empirical studies have focused on the socialization of teenagers, proving that the socialization with the surrounding environment prevent sexist practices. In a previous work, we developed and tested the effectiv...

The Large Hadron Collider (LHC) is about to enter its third run at unprecedented energies. The experiments at the LHC face computational challenges with enormous data volumes that need to be analysed by thousands of physics users. The ATLAS EventIndex project, currently running in production, builds a complete catalogue of particle collisions, or e...

Online paper: https://www.mdpi.com/2079-9292/10/9/1083 ------------------------------------------------------------------------------------------------------------------------------------------------The study of Deoxyribonucleic Acid (DNA) methylation has allowed important advances in the understanding of genetic diseases related to abnormal cell b...

Online paper: https://link.springer.com/article/10.1007/s11227-020-03269-z ------------------------------------------------------------------------------------------------------------------------------------------------DNA methylation analysis has become an important topic in the study of human health. DNA methylation analysis requires not only a s...

Background: Software tools for analyzing DNA methylation do not provide graphical results which can be easily identified, but huge text files containing the alignment of the samples and their methylation status at a resolution of base pairs. There have been proposed different tools and methods for finding Differentially Methylated Regions (DMRs) a...

Augmented Reality (AR) has become a mainstream technology in the development of solutions for repair and maintenance operations. Although most of the AR solutions are still limited to specific contexts in industry, some consumer electronics companies have started to offer pre-packaged AR solutions as alternative to video-based tutorials (VT) for mi...

(Online paper: "https://doi.org/10.1177/1094342019840792"). DNA methylation (mC) and hydroxymethylation (hmC) can significantly affect the normal human development, as well as health and disease status. hmC studies require not only specific treatment of DNA, but also software tools for their analysis. However, there are no software tools capable of...

Current software tools for analyzing the DNA methylation yield the results as text files whose sizes reach tens or hundreds of GBytes, and they are not useful by themselves to biomedical researchers, who need to compare methylation information at different scales. Several tools for discovering differentially methylated regions have been proposed, b...

En los últimos años se han propuesto diversos enfoques estadísticos para la identificación de regiones diferencialmente metiladas entre grupos de muestras de ADN, a partir de los datos ofrecidos por diferentes herramientas de anánalis de metilación. Sin embargo, estos enfoques no ofrecen una exploración interactiva de estas regiones, y añaden una c...

The market of luxury watches has been continuously growing across the world, regardless of economic crisis. However, consumers can purchase online, on the web pages of the luxury watchmakers, the same product they can acquire in physical retail stores, producing a significant reduction in the overall sales of the latter ones. To reduce this trend,...

Online paper: https://link.springer.com/article/10.1007/s11227-018-2360-3. ------------------------------------------------------------------------------------------------------------------------------------------------------------ Curved monitors are getting more and more popular nowadays, due to the immersive sensation they provide to users in fr...

(Full text: http://link.springer.com/article/10.1007/s11227-018-2670-5). Different statistical approaches have been proposed last years for finding differentially methylated DNA regions, starting from the outputs of DNA methylation analysis tools. However, these approaches do not allow an interactive and flexible exploration of these regions. Addit...

In this paper, we propose a fast and easy-to-use projector calibration method needing a minimum set of input data, thus reducing the calibration time. The method is based on the Direct Linear Transformation (DLT) mathematical model, which makes it simple and fully automatic. We show the application of this method on cylindrical surfaces, as well as...

La metilación (5mC) y la hidroximetilación (5hmC) del ADN pueden afectar significativamente al desarrollo de algunas enfermedades graves, siendo actualmente materia de estudio en el campo de la genómica. El estudio de la hidroximetilación requiere de tratamientos específicos del ADN y herramientas software para su análisis. Sin embargo, no existen...

Software tools for analyzing the yield the results as text files which usually have sizes of tens or hundreds of GBytes, and they are not useful by themselves of biomedical researchers , who need to compare methylation information at different scales. Several tools for discovering differentially methylated regions have been proposed, but they are b...

International regulations determine that food in hospitals and elderly homes must be served at given temperature ranges. However, the real-time surveillance of the meal distribution trolleys along all the institutions facilities, guaranteeing conformity to rules from the instant when all the meals are put in the distribution trolley until they are...

Displacement mapping algorithms improve the accuracy and performance of terrain rendering in real-time visualization applications. Per-vertex methods are usually implemented by means of hardware tessellation, and per-pixel techniques like parallax mapping apply changes at the pixel level using the fragment shader. However, parallax mapping has not...

DNA methylation is an important mechanism of epigenetic regulation in development and disease. New generation sequencers allow genome-wide measurements of the methylation status by reading short stretches of the DNA sequence (Methyl-seq). Several software tools for methylation analysis have been proposed over recent years. However, the current tren...

DNA methylation (mC) and hydroxymethylation (hmC) can have a significant effect on normal human development, health and disease status. Hydroxymethylation studies require specific treatment of DNA, as well as software tools for their analysis. In this paper, we propose a parallel software tool for analyzing the DNA hydroxymethylation data obtained...

Curved monitors are getting more and more popular nowadays, due to the immersive sensation they provide to users in front of planar monitors. The display in curved monitors are cylindrical surfaces with significant curvatures, which must be taken into account for a correct projection of the rendered scene. In this paper, we propose new equations fo...

DNA methylation analysis has become a key aspect in the study of many worldwide extended diseases as cancer or diabetes. Methy-lation analysis software tools such as BSMAP, Bismark or HPG-Methyl allow the detection of the methylation status and methylation context with single base resolution. However, output alignment data has to be further process...

DNA methylation analysis is a commonly used technique to study the epigenomic state of sequenced cells. Methylation analysis software such as HPG-Methyl or Bismark allow the detection of the methylation status and methylation context with single base resolution. However, output alignment data has to be further processed in order to obtain genome-wi...

BackgroundDNA methylation is an important mechanism of epigenetic regulation in development and disease. New generation sequencers allow genome-wide measurements of the methylation status by reading short stretches of the DNA sequence (Methyl-seq). Several software tools for methylation analysis have been proposed over recent years. However, the cu...

Interactive 3D terrain visualization plays an important role in multiple networked applications like virtual worlds visualization, multiplayer games or distributed simulators. Since the client/server architecture has obvious scalability limitations, different peer-to-peer schemes have been proposed as trade-off solutions that yield good robustness,...

Real-time terrain visualization plays an important role in multiple popular applications. In these applications, displacement mapping algorithms (both per-vertex and per-pixel methods) can be used to improve the accuracy and performance of terrain rendering. Per-vertex methods are usually implemented by means of hardware tessellation, and per-pixel...

Multi-agent systems allow the modelling of complex, heterogeneous, and distributed systems in a realistic way. MARL-Ped is a multi-agent system tool, based on the MPI standard, for the simulation of different scenarios of pedestrians who autonomously learn the best behavior by Reinforcement Learning. MARL-Ped uses one MPI process for each agent by...

Real-Time terrain visualization plays an important rule in multiple popular applications like geographical information systems, computer games, or civil or militar sim-ulators, where hardware tessellation has become a de-facto standard nowadays in the graphic pipeline. Also, post-processing techniques enhance the appearance of the rendered image by...

DNA methylation is an important mechanism of epigenetic regulation in development and disease. It is a heritable modifiable chemical process that affects gene transcription, and it is associated with other molecular markers (e.g. gene expression) and phenotypes (e.g. cancer or other diseases) (Jones, 13). Although many methods for DNA methylation p...

Background: A common problem of some information technology courses is the difficulty of providing practical exercises. Although different approaches have been followed to solve this problem, it is still an open issue, specially in security and computer network courses. Results: This paper proposes NETinVM, a tool based on nested virtualization...

Motivation: DNA methylation analysis suffers from very long processing time, since the advent of Next-Generation Sequencers (NGS) has shifted the bottleneck of genomic studies from the sequencers that obtain the DNA samples to the software that performs the analysis of these samples. The existing software for methylation analysis does not seem to s...

Interactive terrain visualization applications have become usual tools last years. However, one of the main problems of these application is scalability, since the systems supporting this kind of applications usually follow a client/server model that cannot support a large number of concurrent requests without using a considerable number of servers...

Different communication-aware mapping techniques were proposed in recent years for improving the performance of distributed systems based on both, off-chip and on-chip networks. Some of these proposals were based on heuristic search for finding pseudo-optimal assignments of tasks and processing elements. However, the technology integration improvem...

Optical three-dimensional shape measurement based on structured light has been widely used for 3D measurement in many different applications. Although many different methods for 3D object reconstruction have been proposed last years, surprisingly none of the proposals includes a parallelization study of the tasks executed on computers, preventing t...

The governance requires technical support regarding the complexity in deciding health policies to assist people who require long-term care. Long-term care policies require the use of ICT simulation tools that can provide policy makers with the option of going into a decision theatre and virtually knowing the consequences of different policies prior...

Collaborative Augmented Reality (CAR) systems based on mobile phones have experienced a huge expansion last years, since the hardware features of most mobile phones provide excellent multimedia services and wireless network capabilities. In previous works, we improved the performance of large scale CAR systems based on mobile phones that use fiduci...

Collaborative Augmented Reality (CAR) systems allow multiple users to share a real world environment, including computer-generated images in real time. The hardware features of most current mobile phones include wireless network capabilities that offer a natural platform for CAR systems. However, the potential number of clients in CAR systems based...

In this paper, we propose a simulator for integrated long-term care systems using as a starting point a holistic model of care systems for people that need long term care, the Sustainable Socio-Health Model (SSHM). The implementation of the simulator on the Jason multi-agent platform allows the tool to include the human interactions, preferences, a...

Last years have witnessed the widespread use of online terrain visualization applications. However, the significant improvements achieved in sensing technologies have allowed an increasing size of the terrain databases. These increasing sizes represent a serious drawback when terrain data must be transmitted and rendered at interactive rates. In th...

Multiagent platforms need to be evaluated focusing on the underlying computer architecture in order to allow developers to exploit the parallelism available in multicore processors. This paper presents the characterization of Jason, a well-known Java-based multiagent platform, when executed on distributed shared memory architectures. Since this kin...

Several augmented reality systems have been proposed for different target fields such as medical, cultural heritage and military. However, most of the current AR authoring tools are actually programming interfaces that are exclusively suitable for programmers. In this paper, we propose an AR authoring tool which provides advanced visual effect, suc...

Resumen— In recent years, large scale distributed virtual environments have become a major trend in distributed applications, mainly due to the enormous popularity of multi-player online games in the enter- tainment industry. Thus, scalability has become an essential issue for these highly interactive systems. In this paper, we propose a new synchr...

Paper online: https://www.sciencedirect.com/science/article/pii/S0167739X12002087 ---------------------------------------------------------------------------------------------------------------------------------------- Over the last few years, there has been a lot of development of interactive terrain visualization applications using remote databas...

La propuesta de trabajar por competencias en lugar de hacerlo como se hacía tradicionalmente, por objetivos, ha hecho proliferar propuestas y alternativas metodo- lógicas para favorecer un cambio en la Educación Superior. Una de estas metodologías es el aprendizaje basado en problemas (ABP). El ABP es una metodología de aprendizaje en la cual el pu...

Collaborative Augmented Reality (CAR) systems allow multiple users to share a real work environment including computer-generated images in real time. Currently, the hardware features of most mobile phones makes them a natural platform for CAR systems. However, the wide variety of these hardware features can have important effects on the performance...

Interactive applications like crowd simulations need to properly render the virtual world while simulating the interaction of thousands of agents at the same time. The computational workload generated by these two tasks highly increases with the number simulated agents, requiring a scalable design of the multiagent system. In this paper we present,...

The governance requires technical support regarding the complexity in deciding health policies to assist people who require long-term care. Long-term care policies require the use of ICT simulation tools that can provide policy makers with the option of going into a decision theatre and virtually knowing the consequences of different policies prior...

The era of distributed computing, where applications are executed on platforms like clusters, grids and/or clouds of computers, have shown the need for taking into account the communications that take place on distributed computer architectures when executing applications. In that environment, different communication-aware mapping techniques were p...

This paper presents the experimental analysis of mobile phones for Augmented Reality marker tracking, a core task that any CAR application must include. The results show that the most time consuming stage is the marker detection stage, followed by the image acquisition stage. Moreover, the rendering stage is decoupled on some devices, depending on...

The computing capabilities of current multi-core and many-core architectures have been used in crowd simulations for both enhancing crowd rendering and simulating continuum crowds. However, improving the scalability of crowd simulation systems by exploiting the inherent parallelism of these architectures is still an open issue. In this paper, we pr...

This paper presents the experimental comparison of different server implementations for CAR systems based on mobile phones. The results show that the UDP-based implementation provides a significant improvement in system throughput, supporting more than one thousand client devices at interactive rates, at the cost of loosing a very small percentage...

Augmented Reality (AR) applications have been emerged last years as a valuable tool for saving significant costs in maintenance and process control tasks in industry. This trend has been stimulated by the appearance of authoring tools that allow the fast and easy development of AR applications. However, most of current AR authoring tools are actual...

Collaborative Augmented Reality (CAR) systems allow multiple users to share a real world environment including computer-generated images in real time. Currently, the hardware features of most mobile phones provide excellent multimedia services, and it also includes wireless network capabilities that offer a natural platform for CAR systems. However...

The Read-Copy Update (RCU) synchronization method was designed to cope with multiprocessor scalability some years ago, and it was included in the Linux kernel October of 2002. Recently, libraries providing user-space access to this method have been released, although they still have not been used in complex applications. In this paper, we propose t...