Papers by Sergio Ruiz-Loza
Instituto Tecnológico y de Estudios Superiores de Monterrey, 2015
Informatics, 2022
This document presents a systematic review of Multimodal Human–Computer Interaction. It shows how... more This document presents a systematic review of Multimodal Human–Computer Interaction. It shows how different types of interaction technologies (virtual reality (VR) and augmented reality, force and vibration feedback devices (haptics), and tracking) are used in different domains (concepts, medicine, physics, human factors/user experience design, transportation, cultural heritage, and industry). A systematic literature search was conducted identifying 406 articles initially. From these articles, we selected 112 research works that we consider most relevant for the content of this article. The articles were analyzed in-depth from the viewpoint of temporal patterns, frequency of usage in types of technology in different domains, and cluster analysis. The analysis allowed us to answer relevant questions in searching for the next steps in work related to multimodal HCI. We looked at the typical technology type, how the technology type and frequency have changed in time over each domain, a...
Energy Issues and Transition to a Low Carbon Economy, 2021
International Journal on Interactive Design and Manufacturing (IJIDeM), 2020
Most socio-technological Systems are complex and have many variables interconnected, which makes ... more Most socio-technological Systems are complex and have many variables interconnected, which makes them hard to predict and more important to control. Moreover, in many cases it is required to choose a plan of action that would bring some consequences and/or rewards. Under those circumstances it is important to make a decision based on the system's variables, requirements, munificence and complexity and that they are evaluated using feasibility, viability, key performance indicators and time. In particular, the time required to make a decision. Hence, the correct use of decision-making tools would increase the chance of making a correct choice. For this reason, this work focuses on the list of requirements for a facilitation room, facilitation staff and tools, that would help the stakeholders to make a choice in a timely manner. The work ends with some suggestions that are likely to favor the final decision.
2015 Fourteenth Mexican International Conference on Artificial Intelligence (MICAI), 2015
Classic path finding algorithms are not adequate in real world path planning, where environment i... more Classic path finding algorithms are not adequate in real world path planning, where environment information is incomplete or dynamic and Markov Decision Processes have been used as an alternative. The problem with the MDP formalism is that its state space grows exponentially with the number of domain variables, and its inference methods grow with the number of available actions. To overcome this issue, we formulate a MDP solver in terms of matrix multiplications, based on the Value Iteration algorithm, thus we can take advantage of the graphic processor units (GPUs) to produce interactively obstacle-free paths in the form of an Optimal Policy. We also propose a hexagonal grid navigation space, that reduces the cardinality of the MDP state set. We present a performance analysis of our technique using embedded systems, desktop CPU and GPUs and its application in crowd simulation. Our GPU algorithm presents 90x speed up in desktop platforms, and 30x speed up in embedded systems in contrast with its CPU multi-threaded version.
Frontiers in Education
In this article we show how to facilitate the development of mathematical skills using 3D surface... more In this article we show how to facilitate the development of mathematical skills using 3D surface visualization tools and virtual environments in an online, project-based learning context. The “Lumen” software is presented, which is an ad-hoc solution, designed and developed to visualize and combine mathematical surfaces in 3D, based on their associated equations. Several activities were designed with the use of Lumen, to measure the learning gain and problem-solving skills of the students, obtaining that a mean learning gain of 43% was observed on 242 students on the analysis of the pre- and post-tests for the first monitored activity, while a mean learning gain of 30% was observed on 210 students on the analysis of the second monitored activity. Based on these analyses, we make the point that although remote learning in the context of the COVID-19 pandemic poses difficult challenges for learners and professors, the use of ad-hoc technological applications is an important resource ...
The Journal of Supercomputing, 2018
The rapid increase in performance, programmability, and availability of graphics processing units... more The rapid increase in performance, programmability, and availability of graphics processing units (GPUs) has made them a compelling platform for computationally demanding tasks in a wide variety of application domains. One of these is real-time computational fluid dynamics, which are computationally expensive due to a large number of grid points that require calculations. One commonly used tool to simulate fluid flows is the Lattice Boltzmann method (LBM), mainly due to its simpler formulation when compared to solving the Navier-Stokes equations, and because of its scalability on parallel processing systems. In this paper, we give an up-to-date survey on the research regarding the LBM for fluid simulation using GPUs. We discuss how the method was implemented with different GPU architectures and software frameworks, focusing on optimization techniques and their performance. Additionally, we mention some applications of the method in different areas of study.
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Papers by Sergio Ruiz-Loza