Andrés Vargas

ORCID: 0000-0003-2444-1495
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Research Areas
  • Advanced Multi-Objective Optimization Algorithms
  • Metaheuristic Optimization Algorithms Research
  • Evolutionary Algorithms and Applications
  • Crime, Illicit Activities, and Governance
  • Advanced Optimization Algorithms Research
  • Geometric Analysis and Curvature Flows
  • Microplastics and Plastic Pollution
  • Advanced Harmonic Analysis Research
  • Advanced Differential Geometry Research
  • advanced mathematical theories
  • Advanced Mathematical Physics Problems
  • Nonlinear Partial Differential Equations
  • Lung Cancer Treatments and Mutations
  • Hydrological Forecasting Using AI
  • Mathematical Approximation and Integration
  • Air Quality Monitoring and Forecasting
  • Evolutionary Game Theory and Cooperation
  • Black Holes and Theoretical Physics
  • Advances in Oncology and Radiotherapy
  • Environmental and Ecological Studies
  • Advanced Radiotherapy Techniques
  • Oceanographic and Atmospheric Processes
  • Ophthalmology and Eye Disorders
  • Numerical methods in inverse problems
  • Marine Biology and Ecology Research

Pontificia Universidad Javeriana
2011-2022

Diego Portales University
2021

Instituto de Radiomedicina
2021

Low-density polyethylene (LDPE) waste generates an environmental impact. To achieve the most suitable option for their degradation, it is necessary to implement chemical, physical and biological treatments, as well combining procedures. Best treatment was prognosticated by Plackett-Burman Experimental Design (PB), evaluating five factors with two levels (0.25 mM or 1.0 gL-1 glucose, 2.0 CuSO4, 0.1 0.2 ABTS [2, 20-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid)], pH 4.5 ± 7.0 30 90 day...

10.1371/journal.pone.0203786 article EN cc-by PLoS ONE 2018-09-13

The analysis of synoptic satellite data total chlorophyll-a (Chl-a) and the environmental drivers that influence nutrient light availability for phytoplankton growth allows us to understand spatio-temporal variability biomass. In Panama Bight Tropical region (PB; 1–9°N, 79–84°W), spatial distribution Chl-a is mostly related seasonal wind patterns intensity localized upwelling centers. However, association between different physical variables still not fully assessed. this study, we evaluate...

10.3390/rs12132150 article EN cc-by Remote Sensing 2020-07-04

The Hausdorff distance is a widely used tool to measure the between different sets. For approximation of certain objects via stochastic search algorithms this is, however, limited use as it punishes single outliers. As remedy in context evolutionary multi-objective optimization (EMO), averaged Δ p has been proposed that better suited an indicator for performance assessment EMO since such methods tend generate Later on, two-parameter , q finite sets extension which also averages distances,...

10.3390/mca23030051 article EN cc-by Mathematical and Computational Applications 2018-09-18

10.1515/gmj-2014-0060 article EN Georgian Mathematical Journal 2015-01-09

Abstract Corruption and organized crime are social problems that affect different communities around the world, involving public private organizations in diverse sectors activities. However, these global phenomena transcend economic, cultural, borders, especially, when corrupt individuals use financial system to protect their illegal money. This paper aims evaluate money laundering mechanism networks, studying structure of some suspicious groups, how they could be detected by topological...

10.1140/epjds/s13688-022-00318-w article EN cc-by EPJ Data Science 2022-02-08

The averaged Hausdorff distance p is aninframetric which has been recently used in evolutionary multiobjective optimization (EMO). In this paper we introduce a new two-parameter performance indicator p,q generalizes as well the standard distance. For p, q > 1 (that call (p, q)-averaged distance) turns out to be aproper metric and preserves some of advantages. We proof several properties p,q, provide acomparison with simplicity restrict our selves finite sets, most common case, but results...

10.13053/cys-22-2-2950 article EN Computación y Sistemas 2018-07-01

We study the existence of minimizers a regularized non-convex functional in context variable exponent Sobolev spaces by application direct method calculus variations. The results are new even framework classical Lebesgue spaces.

10.1142/s0129167x14500116 article EN International Journal of Mathematics 2014-01-01

The aim of this paper is to give the geometrical/physical interpretation conserved quantities corresponding each Noether symmetry geodetic Lagrangian plane symmetric space-times. For purpose, we present a complete list nonstatic space-times along with generators all symmetries Lagrangian. Additionally, structure constants associated Lie algebras, Riemann curvature tensors, and energy-momentum tensors are obtained for case. It worth mentioning that contains classes solutions have been earlier...

10.1155/2017/4384093 article EN cc-by Advances in Mathematical Physics 2017-01-01

The averaged Hausdorff distance ∆p is an inframetric, recently introduced in evolutionary multiobjective optimization (EMO) as a tool to measure the optimality of finite size approximations Pareto front associated problem (MOP). Tools this kind are called performance indicators, and their quality depends on useful criteria they provide evaluate suitability different candidate solutions given MOP. We present here purely theoretical study compliance -indicator notion optimality. Since defined...

10.11144/javeriana.sc23-3.otpc article EN cc-by Universitas Scientiarum 2018-09-28

Low-density polyethylene (LDPE) sheets (3.0 ± 0.1 cm) received sequential treatment, first by the action of direct-current low-pressure plasma (DC-LPP) with a 100% oxygen partial pressure, 3.0 × 10−2 mbar 600 V DC tension, 5.6 cm distance, 6-min treatment. Then, were submitted to TiO2 photocatalysis at UV radiation 254 nm (TiO2/UV) pH value 4.5 0.2 and concentration 1 gL−1. We achieved complementary effect on transformation LDPE films. With ablation was generated, which increased...

10.3390/molecules26092513 article EN cc-by Molecules 2021-04-26

Multi-objective optimization problems (MOPs) naturally arise in many applications. Since for such one can expect an entire set of optimal solutions, a common task based multi-objective is to compute N solutions along the Pareto set/front given MOP. In this work, we propose and discuss Newton methods performance indicators Generational Distance (GD), Inverted (IGD), averaged Hausdorff distance Δp reference unconstrained MOPs. The hence directly utilize scalarization that are induced by these...

10.3390/math8101822 article EN cc-by Mathematics 2020-10-17

10.1134/s2070046617030025 article EN P-Adic Numbers Ultrametric Analysis and Applications 2017-07-01

We study the dynamical behavior of solutions an n -dimensional nonlinear Schrödinger equation with potential and linear derivative terms under presence phenomenological damping. This is a general version dissipative Gross-Pitaevskii including first-order derivatives in spatial coordinates which allow for rotational contributions. obtain conditions existence global attractor find bounds its dimension.

10.1155/2013/874196 article EN cc-by International Journal of Differential Equations 2013-01-01

We consider compatibility conditions between Poisson and Riemannian structures on smooth manifolds by means of a contravariant partially complex structure, or $f$-structure, introducing the notion (almost) Kähler--Poisson manifolds. In addition, we study some their properties under structure preserving maps symmetries.

10.48550/arxiv.1709.02525 preprint EN other-oa arXiv (Cornell University) 2017-01-01

In this paper we consider the Blaschke's asymptotic lines (also called affine lines) of regular surfaces in 3-space. We study binary differential equations defining elliptic and hyperbolic regions surface near cusp points to at umbilic points. also describe Euclidean parabolic set including flat

10.48550/arxiv.2011.06511 preprint EN other-oa arXiv (Cornell University) 2020-01-01
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