Browsing by Title Facultad de Ciencias Físicas y Matemáticas

Now showing items 36-55 of 20250

    • A (5/3 +)-Approximation for unsplittable flow on a path: Placing small tasks into boxes 
      Grandoni, Fabrizio; Wiese, Andreas; Mömke, Tobias; Zhou, Hang (Association for Computing Machinery, 2018)
      In the unsplittable flow on a path problem (UFP) we are given a path with edge capacities and a collection of tasks. Each task is characterized by a subpath, a profit, and a demand. Our goal is to compute a maximum ...
    • A 3-D perspective to the internal properties of low and high-redshift galaxies 
      Molina Tobar, Juan Andrés (Universidad de Chile, 2019)
      En el presente trabajo estudio la morfología y cinemática de dos muestras de galaxias a bajo y alto corrimiento al rojo (redshift). Analizo la cinemática interna de estas galaxias con objetivo de encontrar posibles ...
    • A 30 kpc spatially extended clumpy and asymmetric galactic outflow at z similar to 1.7 
      Shaban, Ahmed; Bordoloi, Rongmon; Chisholm, John; Sharma, Soniya; Sharon, Keren; Rigby, Jane R.; Gladders, Michael G.; Bayliss, Matthew B.; Barrientos, L. Felipe; López Morales, Sebastián Víctor Claudio; Tejos, Nicolas; Ledoux, Cédric; Florian, Michael K. (IOP, 2022)
      We image the spatial extent of a cool galactic outflow with fine-structure Fe ii* emission and resonant Mg ii emission in a gravitationally lensed star-forming galaxy at z = 1.70347. The Fe ii* and Mg ii (continuum-subtracted) ...
    • A 3D Iris Scanner from a Single Image Using Convolutional Neural Networks 
      Benalcazar, DP; Zambrano, JE; Bastias, D; Perez, CA; Bowyer, KW (Institute of Electrical and Electronics Engineers Inc., 2020)
    • A 3D Voronoi+Gapper Galaxy Cluster Finder in Redshift Space to z ∼ 0.2. II. An Abundant Cluster Population ... 
      Campusano Brown, Luis; Marinello, Gabriel; Clowes, Roger G.; Haines, Christopher P.; Pereira, Sebastián; Pizarro, Daniel; Hitschfeld Kahler, Nancy; Söchting, Ilona K. (IOP, 2020)
      We identify 1901 galaxy clusters (N-g >= 2) with the VoML+G algorithm (Paper I) on the Two-Degree Field Galaxy Redshift Survey. We present the 341 clusters with at least 10 galaxies that are within 0.009 < z < 0.14 (the ...
    • A 4-year follow-up case of extrusive luxation in a patient with cerebral palsy 
      Véliz Ramírez, Andrea; Krämer Strenger, Susanne; Solar López, Melissa; Muñoz Cortes, Pamela; Corral Núñez, Camila (Blackwell Publishing Inc., 2019)
      © 2019 Special Care Dentistry Association and Wiley Periodicals, Inc.Cerebral palsy (CP) is a condition caused by brain damage before, during, or shortly after birth. Communication can be a challenge when treating patients ...
    • A 50 pc scale view of star formation efficiency across NGC 628 
      Kreckel, K.; Faesi, C.; Kruijssen, J. M. D.; Schruba, A.; Groves, B.; Leroy, A. K.; Bigiel, F.; Blanc Mendiberri, Guillermo; Chevance, M.; Herrera C., Daniel; Hughes, A.; McElroy, R.; Pety, J.; Querejeta, M.; Rosolowsky, E.; Schinnerer, E.; Sun, J.; Usero, A.; Utomo, D. (IOP Publishing, 2018)
      Star formation is a multi-scale process that requires tracing cloud formation and stellar feedback within the local (less than or similar to kpc) and global galaxy environment. We present first results from two large ...
    • A bayesian based methodology for indirect object search 
      Loncomilla, Patricio; Ruíz del Solar San Martín, Javier; Saavedra A., Marcelo (Springer, 2018)
      The main goal of this paper is to propose a Bayesian based methodology for implementing robot informed search for objects. The methodology uses convolutions between observation likelihoods of secondary objects and spatial ...
    • A Bayesian mixture-of-gaussians model for astronomical observations in interferometry 
      Araya Hernández, Lerko; Osses Alvarado, Axel; Silva Sánchez, Jorge; Tobar Henríquez, Felipe Arturo (IEEE, 2017)
      The interferometry problem addresses the estimation of an unknown quantity exploiting the interference among measurements from different sources. These measurements are obtained from the Fourier domain but are sparse and ...
    • A better tomorrow: towards human-oriented, sustainable transportation systems 
      Antoniou, Constantinos; Chaniotakis, Emmanouil; Katrakazas, Christos; Tirachini, Alejandro (Editorial Board EJTIR, 2020)
      In a rapidly changing world, transportation is a big determinant of quality of life, financial growth and progress. New challenges (such as the emergence of the COVID-19 pandemic) and opportunities (such as the three ...
    • A bibliometric analysis of aggregation operators 
      Blanco Mesa, Fabio; León Castro, Ernesto; Merigó Lindahl, José (Elsevier Ltd, 2019)
      Aggregation operators consist of mathematical functions that enable the combining and processing of different types of information. The aim of this work is to present the main contributions in this field by a bibliometric ...
    • A Bibliometric Analysis of the First 25 Years of the Journal of Business-to-Business Marketing 
      Valenzuela Fernández, Leslier; Merigó Lindahl, José; Lichtenthal, J. David; Nicolas, Carolina (Routledge, 2019)
      Purpose: As part of the recognition of the 25th anniversary of the Journal of Business-to-Business Marketing (JBBM), this paper presents an overview of the JBBM through a bibliometric analysis (BA) of its content from 1992 ...
    • A branch and price algorithm for a Stackelberg Security Game 
      Lagos, Felipe; Ordóñez Pizarro, Fernando; Labbé, Martine (Elsevier, 2017)
      Mixed integer optimization formulations are an attractive alternative to solve Stackelberg Game problems thanks to the efficiency of state of the art mixed integer algorithms. In particular, decomposition algorithms, such ...
    • A branch-and-cluster coordination scheme for selecting prison facility sites under uncertainty 
      Hernández, Patricio; Alonso-Ayuso, Antonio; Bravo, Fernanda; Escudero, Laureano F.; Guignard, Monique; Marianov Kluge, Vladimir; Weintraub Pohorille, Andrés (PERGAMON-ELSEVIER, 2012-09)
      A multi-period stochastic model and an algorithmic approach to location of prison facilities under uncertainty are presented and applied to the Chilean prison system. The problem consists of finding locations and sizes of ...
    • A bright inner disk and structures in the transition disk around the very low-mass star CIDA1 
      Pinilla, P.; Kurtovic, N. T.; Benisty, Myriam; Manara, C. F.; Natta, A.; Sanchis, E.; Tazzari, M.; Stammler, S. M.; Ricci, L.; Testi, L. (EDP Sciences, 2021)
      The frequency of Earth-sized planets in habitable zones appears to be higher around M-dwarfs, making these systems exciting laboratories to investigate planet formation. Observations of protoplanetary disks around very ...
    • A capsule neural network based model for structural damage localization and quantification using transmissibilty ... 
      Figueroa Barraza, Joaquín Eduardo (Universidad de Chile, 2019)
      Dentro de la ingeniería estructural, el monitoreo de condición usando diferentes tipos de sensores ha sido importante en la prevención de fallas y diagnóstico del estado de salud. El desafío actual es aprovechar al máximo ...
    • A cell centered polynomial basis for efficient Galerkin predictors in the context of ADER finite volume ... 
      Montecinos, Gino I.; Balsara, Dinshaw S. (Elsevier, 2017)
      In this paper, a family of high-order space-time polynomials in the context of continuous and discontinuous Galerkin methods is proposed. The resulting Galerkin schemes are used as a building block in ADER methods for ...
    • A centimetre-wave excess over free–free emission in planetary nebulae 
      Casassus Montero, Simón; Nyman, L. A.; Dickinson, C.; Pearson, T. J. (WILEY-BLACKWELL, 2007-12-21)
      We report a centimetre-wave (cm-wave, 5-31 GHz) excess over free-free emission in planetary nebulae (PNe). Accurate 31- and 250-GHz measurements show that the 31-GHz flux densities in our sample are systematically higher ...
    • A characteristic martingale related to the counting process of records 
      Gouet Bañares, Raúl; López, F. Javier; Sanz, Gerardo (2007)
      Let (Xn) be a sequence of nonnegative, integrable, independent and identically distributed random variables, with common distribution function F. We consider the problem of finding all distribution functions F such that ...
    • A cheap mesoporous silica from fly ash as an outstanding adsorbent for sulfate in water 
      Castillo, Ximena; Pizarro, Jaime; Ortiz, Claudia; Cid, Héctor; Flores Carrasco, Marcos; De Canck, Els; Van Der Voort, Pascal (Elsevier B.V., 2018)
      This research describes the development of a very cheap mesoporous silica material similar to hexagonal mesoporous silica (HMS) and using a silicate extract as precursor. This precursor is obtained from cheap fly ash by ...