Luis Alfonso Villa‐Vargas

ORCID: 0000-0003-4938-700X
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About
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Research Areas
  • Fuzzy Logic and Control Systems
  • Parallel Computing and Optimization Techniques
  • Mathematical Control Systems and Analysis
  • Embedded Systems Design Techniques
  • Neural Networks and Applications
  • Advanced Data Processing Techniques
  • Interconnection Networks and Systems
  • Advanced Scientific Research Methods
  • Gas Sensing Nanomaterials and Sensors
  • Rough Sets and Fuzzy Logic
  • Distributed and Parallel Computing Systems
  • Advanced Chemical Sensor Technologies
  • Evolutionary Algorithms and Applications
  • Multi-Criteria Decision Making
  • Network Security and Intrusion Detection
  • CCD and CMOS Imaging Sensors
  • Analog and Mixed-Signal Circuit Design
  • Carbon Nanotubes in Composites
  • Bayesian Modeling and Causal Inference
  • Analytical Chemistry and Sensors
  • Advanced Malware Detection Techniques
  • Acoustic Wave Resonator Technologies
  • Experimental Learning in Engineering
  • Advanced MEMS and NEMS Technologies
  • Acute Ischemic Stroke Management

Complejo Hospitalario de Salamanca
2024-2025

Universidad Nacional de Colombia
2025

Instituto Politécnico Nacional
2014-2024

Tecnológico Nacional de México
2009-2019

Mexican Institute of Petroleum
2003-2005

Determination of markers systemic inflammation is one the important directions in study pathogenesis and improvement diagnosis chronic obstructive pulmonary disease (COPD), asthma-COPD overlap (ACO), bronchial asthma (BA). The aim our work was a comparative features changes serum levels IL-17, IL-18, TNF- α patients with COPD, ACO, BA various severity disease, as well evaluation relationship between level these cytokines lung ventilation function. A total 147 COPD (<mml:math...

10.1155/2020/4652898 article EN cc-by Mediators of Inflammation 2020-07-12

Multiwall carbon nanotubes (MWCNTs) were easily and efficiently decorated with Pd nanoparticles through a vapor-phase impregnation-decomposition method starting from palladium acetylacetonates. The sensor device consisted on film of sensitive material (MWCNTs-Pd) deposited by drop coating platinum interdigitated electrodes SiO2 substrate. exhibited resistance change to ozone (O3) response time 60 s at different temperatures the capability detecting concentrations up 20 ppb. shows best when...

10.3390/s140406806 article EN cc-by Sensors 2014-04-14

Background Although mechanical thrombectomy (MT) is an effective treatment for large vessel occlusion (LVO) with a high successful recanalization rate, MT failure (MTF) occurs in 10–15% of cases and associated unfavorable outcomes. However, little known about the clinical, technical, radiological reasons MTF. We investigated technical factors Methods conducted retrospective analysis consecutive patients anterior LVO prospectively included ongoing observational multicenter ROSSETTI registry....

10.1136/jnis-2025-023078 article EN Journal of NeuroInterventional Surgery 2025-04-25

A bipolar rating scale is a linearly ordered set with symmetry between elements considered as negative and positive categories.First, we present survey of scales used in psychology, sociology, medicine, recommender systems, opinion mining, sentiment analysis.We discuss different particular cases and, particular, typical structures verbal labels that can be for construction scales.Next, introduce the concept scoring function preserving linear ordering scales, study its properties, propose...

10.12700/aph.14.3.2017.3.3 article EN Acta Polytechnica Hungarica 2017-09-21

Fuzzy theory applications have been explored and analyzed on fields as pattern recognition, control, data classification, signal processing, expert systems, among others. To accomplish this, more complex calculations faster processing speed are required, turning fuzzy hardware implementation to be the perfect choice. operations t-norms t-conorms used in systems conjunction disjunction respectively. Commonly for minimum algebraic product, first one is cheaper implement; second consumes...

10.1109/fuzzy.2009.5277409 article EN IEEE International Conference on Fuzzy Systems 2009-08-01

The problem of construction parametric classes fuzzy conjunction and disjunction operations suitable for efficient digital hardware implementation is studied. set generators that can be used in generation conjunctions proposed. These together with basic t-norms t-conorms to generate new effective implementation. A method considered. An example FPGA done.

10.1109/icccyb.2009.5393942 article EN 2009-11-01

Honeypots  systems  are   an   important  piece  of   the   network  security infrastructure and can be deployed to accomplish different purposes such as: network sensing, capturing learning about 0-day exploits, analyzing of black hat techniques, deterring hats data gathering for doing  statistical  analysis  over  the  Internet  traffic,  among  others. Nevertheless, all honeypots need look like real systems, due if a honeypot is unmasked, it loses its value. This paper presents new...

10.11591/ijece.v4i6.6885 article EN International Journal of Electrical and Computer Engineering (IJECE) 2014-12-01

The methods of 3D visualization the main similarity measures for binary data and 2x2 tables are proposed. shapes Jaccard, Dice, Sokal & Sneath, Roger Tanimoto other presented. Such gives direct, visual, method comparison these helps to understand difference between them. Based on two known parametric families paper proposes new family generalizing giving possibility construct occupying intermediate position

10.13053/cys-20-3-2457 article EN Computación y Sistemas 2016-09-30

Background Efficient recanalization of occluded cerebral arteries is crucial in the treatment acute ischemic stroke. Double stent retrievers have shown potential to enhance rates on first pass. This study aims evaluate efficacy and safety double retriever technique predictors achieving first-pass effect patients with Methods prospective multicenter involved 209 from 16 comprehensive stroke centers Spain. Patients occlusions anterior circulation were treated using Aperio Hybrid retriever. The...

10.1136/jnis-2024-022297 article EN Journal of NeuroInterventional Surgery 2024-09-17

The paper presents the results of implementation differential evolution algorithm on FPGA using floating point representation with double precision useful in real numeric problems.Verilog Hardware Description Language (HDL) was used for Altera hardware design.Schematics modules are presented.The performance design is evaluated through six different functions problems implemented hardware.

10.12700/aph.25.04.2014.04.9 article EN Acta Polytechnica Hungarica 2014-04-25

A compact differential flipped voltage follower (DFVF) with low power consumption, capable to deliver currents several orders of magnitude larger than its quiescent current and large capacitive loads is presented. In the proposed circuit, a comparator activates an auxiliary transistor whenever required hand over additional reach class-AB operation. Furthermore, Miller compensation performed, by taking advantage impedance node it possible reduce forty times capacitor compared other topologies...

10.1016/j.mejo.2013.03.002 article EN Microelectronics Journal 2013-05-25
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