Browsing by Title Artículos de revistas

Now showing items 4965-4984 of 7543

    • Perceptions and attitudes towards mules in a group of soldiers 
      Lagos, Javiera; Rojas, Manuel; Rodrigues, Joao B.; Tadich, Tamara (MDPI, 2021)
      Working equids play an essential role in the livelihoods of millions of families around the world. The way people, especially their caretakers, perceive them affects attitudes towards them and consequently their welfare. ...
    • A perceptually-motivated low-complexity instantaneous linearchannel normalization technique applied to ... 
      Poblete Ramírez, Víctor; Espic, Felipe; King, Simon; Stern, Richard M.; Huenupán, Fernando; Fredes Sandoval, Josué Abraham; Becerra Yoma, Néstor (Elsevier, 2015)
      This paper proposes a new set of speech features called Locally-Normalized Cepstral Coefficients (LNCC) that are based onSeneff’s Generalized Synchrony Detector (GSD). First, an analysis of the GSD frequency response is ...
    • Perfect Brewster transmission through ultrathin perforated films 
      Pham, K.; Maruel, A.; Mercier, F.-J.; Felix, S.; Cordero Garayar, María Luisa; Horvath, Camila (Elsevier, 2020)
      We address the perfect transmission of a plane acoustic wave at oblique incidence on a perforated, sound penetrable or rigid, film in two-dimensions. It is shown that the Brewster incidence theta* realizing so-called ...
    • Performance analysis and evaluation for active antenna arrays under three-dimensional wireless channel model 
      Li, Guodong; Wu, Jinsong; Chen, Zhixi; Luo, Xiong; Tang, Taolin; Xu, Zhiqiang (Ieee-Inst Electrical Electronics Engineers Inc, 2018)
      In this paper, we establish a full 3-D channel model to support the performance analysis and evaluation of active antenna array (AAA)-based wireless communication systems. We analyze and compare the impact of three different ...
    • Performance Analysis of OFDM-Based VLC Schemes in NLOS Channels 
      Jativa P.P., Azurdia-Meza C.A., Canizares M.R., Zabala-Blanco D., Montejo-Sanchez S. (Institute of Electrical and Electronics Engineers Inc., 2020)
    • Performance analysis of the IEEE 802.15.4 protocol for smart environments under jamming attacks 
      López Vilos, Nicolás Alberto; Valencia Cordero, Claudio; Azurdia Meza, César Augusto; Montejo Sánchez, Samuel; Baraldi Mafra, Samuel (MDPI, 2021)
      Jamming attacks in wireless sensor networks (WSNs) scenarios are detrimental to the performance of these networks and affect the security and stability of the service perceived by users. Therefore, the evaluation of the ...
    • Performance Analysis of the Least-Squares Estimator in Astrometry 
      Lobos, Rodrigo A.; Silva, Jorge F.; Méndez Bussard, René Alejandro; Orchard Concha, Marcos (IOP Publishing, 2015)
      We characterize the performance of the widely used least-squares estimator in astrometry in terms of a comparison with the Cramer-Rao lower variance bound. In this inference context the performance of the least-squares ...
    • Performance assessment of sequential Bayesian processors based on probably approximately correct computation ... 
      Jaras, I.; Orchard Concha, Marcos (Institution of Engineering and Technology - IET, 2018)
      A novel method to characterise the efficacy and efficiency of different sequential Bayesian processor implementations is proposed. This method is based on concepts of probably approximately correct computation and information ...
    • Performance enhancement in OFDM systems with ICI utilizing the improved double jump linear combination pulse 
      Zabala Blanco, David; Campuzano, Gabriel; Azurdia Meza, César; Montejo Sánchez, Samuel (IEE, 2017)
      It is well-know that carrier frequency offset in the subcarriers of orthogonal frequency division multiplexing (OFDM) leads to intercarrier interference (ICI); therefore, system degradation occurs. Nevertheless, this issue ...
    • Performance Enhancement of OFDM-Based Systems Using Improved Parametric Linear Combination Pulses 
      Azurdia Meza, César; Arraño, Hernán F.; Estévez Montero, Claudio; Soto, Ismael (Springer, 2015)
      As the demand for better performance increases in next-generation networks, such as 5G technologies, more efficient modulation techniques are required. In this work, we evaluate the performance of the improved parametric ...
    • Performance evaluation of HTTP/2 window size in the internet of things 
      Londoño, Diego; González, Maite; Céspedes Umaña, Sandra; Bustos Jiménez, Javier; Montenegro, Gabriel (CEUR-WS, 2017)
      Constrained devices are a common factor in the Internet of Things (IoT). These devices have limited RAM and ROM memory, reduced battery, processing capacity, and transmission power. In consequence, these devices may not ...
    • Performance evaluation of mass transfer correlations in the GFMA process: a review with perspectives to the design 
      Estay, Humberto; Troncoso, Elizabeth; Ruby Figueroa, Rene; Romero, Julio (Elsevier, 2018)
      Gas filled membrane absorption process (GFMA), or hollow fiber gas membranes process (HFGM) can replace two units operations (absorption and stripping) in a unique stage based on membrane contactors. But its application ...
    • Performance evaluation of the particle swarm optimization algorithm to unambiguously estimate plasma ... 
      Martínez Ledesma, Miguel; Jaramillo Montoya, Francisco (Springer, 2020)
      Simultaneously estimating plasma parameters of the ionosphere presents a problem for the incoherent scatter radar (ISR) technique at altitudes between ~ 130 and ~ 300 km. Different mixtures of ion concentrations and ...
    • Performance guarantees of local search for minsum scheduling problems 
      Correa Haeussler, José; Muñoz, Felipe T. (Springer, 2020)
      We study the worst-case performance guarantee of locally optimal solutions for the problem of minimizing the total weighted and unweighted completion time on parallel machine environments. Our method makes use of a mapping ...
    • Performance of a continuously rotating half-wave plate on the POLARBEAR telescope 
      Takakura, Satoru; Aguilar Faúndez, Mario; Akiba, Yoshiki; Arnold, Kam; Baccigalupi, Carlo; Barron, Darcy; Beckman, Shawn; Boettger, David; Borrill, Julian; Chapman, Scott; Chinone, Yuji; Cukierman, Ari; Ducout, Anne; Elleflot, Tucker; Errard, Josquin; Fabbian, Giulio; Fujino, Takuro; Galitzki, Nicholas; Goeckner Wald, Neil; Halverson, Nils W.; Hasegawa, Masaya; Hattori, Kaori; Hazumi, Masashi; Hill, Charles; Howe, Logan; Inoue, Yuki; Jaffe, Andrew H.; Jeong, Oliver; Kaneko, Daisuke; Katayama, Nobuhiko; Keating, Brian; Keskitalo, Reijo; Kisner, Theodore; Krachmalnicoff, Nicoletta; Kusaka, Akito; Lee, Adrian T.; Leon, David; Lowry, Lindsay; Matsuda, Frederick; Matsumura, Tomotake; Navaroli, Martin; Nishino, Haruki; Paar, Hans; Peloton, Julien; Poletti, Davide; Puglisi, Giuseppe; Reichardt, Christian L.; Ross, Colin; Siritanasak, Praween; Suzuki, Aritoki; Tajima, Osamu; Takatori, Sayuri; Teply, Grant (IOP Publishing, 2017-05)
      A continuously rotating half-wave plate (CRHWP) is a promising tool to improve the sensitivity to large angular scales in cosmic microwave background (CMB) polarization measurements. With a CRHWP, single detectors can ...
    • Performance of bridges with seismic isolation bearings during the Maule earthquake, Chile 
      Sarrazin Arellano, Mauricio (Elsevier, 2013)
      On February 27, 2010 an earthquake of magnitude Mw=8.8, with epicenter in Cobquecura, Maule region, hit the central part of Chile. After the earthquake, a tsunami occurred that caused heavy casualties and damage to buildings ...
    • Performance of Cu-TiC alloy electrodes developed by reaction milling for electrical-resistance welding 
      Palma Hillerns, Rodrigo; Sepúlveda Osses, Aquiles; Espinoza González, Rodrigo; Montiglio, Roberto C. (ELSEVIER, 2005-10-30)
      The performance of a nominal-composition Cu-5 vol.% TiC alloy, prepared via powder metallurgy, was evaluated when such material was used as electrodes for electrical-resistance welding. Starting from Cu, Ti and graphite ...
    • Performance of optical flow techniques for motion analysis of fluorescent point signals in confocal microscopy 
      Delpiano Costabal, José; Jara, Jorge; Scheer, Jan; Ramírez, Omar A.; Ruiz del Solar, Javier; Härtel, Steffen (Springer, 2012)
      Optical flow approaches calculate vector fields which determine the apparent velocities of objects in timevarying image sequences. They have been analyzed extensively in computer science using both natural and ...
    • Performance of pre-production band 1 receiver for the Atacama Large Millimeter/submillimeter Array (ALMA) 
      Huang, Yau De Ted; Morata, Oscar; Koch, Patrick; Kemper, Ciska; Hwang, Yuh; Chiong, Chau; Ho, Paul; Chu, You; Huang, Chi; Liu, Ching; Hsieh, Fang; Tseng, Yen; Yang, Chia; Tsay, Jinn; Chang, Tsu; Ho, Chin; Chin-Ting, Ho (SPIE, 2018)
      The Atacama Large Millimeter/submillimeter Array (ALMA) Band 1 receiver covers the frequency range of 35-50 GHz. An extension of up to 52 GHz is on a best-effort basis. A total of 73 units have to be built in two phases: ...
    • Performance of tall buildings in Concepción during the 27 February 2010 moment magnitude 8.8 offshore Maule, ... 
      Rojas Barrales, Fabián; Naeim, Farzad; Lew, Marshall; Carpenter, Lauren D.; Youssef, Nabih F.; Saragoni, G. Rodolfo; Schachter Adaros, Macarena (John Wiley, 2011)
      Concepción, near the southern end of the fault rupture zone of the offshore Maule, Chile earthquake, suffered signifi cant damage to all types of structures. Tall reinforced concrete buildings in the region were also ...