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Author Harrison, R.; Silva, F. doi  openurl
  Title A Game Theoretic Analysis Of Voluntary Euthanasia And Physician Assisted Suicide Type Journal Article
  Year 2019 Publication Economic Inquiry Abbreviated Journal Econ. Inq.  
  Volume to appear Issue Pages 19 pp  
  Keywords  
  Abstract In countries/states where voluntary euthanasia (VE) or physician-assisted suicide (PAS) is legal, the patient's decision about whether to request VE or PAS heavily relies on the information others provide. We use the tools of microeconomic theory to study how communication between the patient, his family and his physician influences the patient's decision. We argue that families have considerable power over the patient and that the amount of information that is transmitted from physician to patient might be severely diminished as a result of legalizing VE or PAS. We discuss our main results in the context of the ongoing normative debate over the legalization of VE and PAS. (JEL D8, I12)  
  Address [Harrison, Rodrigo] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Santiago, Chile, Email: rodrigo.harrison@uai.cl;  
  Corporate Author Thesis  
  Publisher Wiley Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0095-2583 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000493791400001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1061  
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Author Harrison, R.; Hernandez, G.; Munoz, R. doi  openurl
  Title A discrete model of market interaction in the presence of social networks and price discrimination Type Journal Article
  Year 2019 Publication Mathematical Social Sciences Abbreviated Journal Math. Soc. Sci.  
  Volume 102 Issue Pages 48-58  
  Keywords Social networks; Agent-based models; Price discrimination  
  Abstract In this paper, we provide a model to study the equilibrium outcome in a market characterized by the competition between two firms offering horizontally differentiated services, in a context where consumers are the basic unit of decision on the demand side and are related through a social network. In the model, we consider that consumers make optimal choice, participation and consumption decisions, while firms optimally decide their tariffs, eventually using nonlinear pricing schemes. This approach permits us to identify and model two different kinds of network externalities, one associated with tariff-mediated network externalities and the other related to participation network externalities. We apply the model to the telecommunication industry, where we study the impact of alternative regulatory interventions. We provide numerical evidence suggesting that policies designed to reduce horizontal differentiation might be more effective than those designed to limit access charges; this result seems robust to the presence of different forms of price discrimination. We should interpret these findings cautiously due to the existence of potential implementation costs for each policy. (C) 2019 Elsevier B.V. All rights reserved.  
  Address [Harrison, Rodrigo] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Santiago, Chile, Email: rodrigo.harrison@uai.cl;  
  Corporate Author Thesis  
  Publisher Elsevier Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0165-4896 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000500049400006 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1077  
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Author Henriquez, P.A.; Ruz, G.A. pdf  doi
openurl 
  Title Noise reduction for near-infrared spectroscopy data using extreme learning machines Type Journal Article
  Year 2019 Publication Engineering Applications Of Artificial Intelligence Abbreviated Journal Eng. Appl. Artif. Intell.  
  Volume 79 Issue Pages 13-22  
  Keywords Near-infrared spectroscopy; Parallel layers; Constrained optimization; Regression; Classification  
  Abstract The near infrared (NIR) spectra technique is an effective approach to predict chemical properties and it is typically applied in petrochemical, agricultural, medical, and environmental sectors. NIR spectra are usually of very high dimensions and contain huge amounts of information. Most of the information is irrelevant to the target problem and some is simply noise. Thus, it is not an easy task to discover the relationship between NIR spectra and the predictive variable. However, this kind of regression analysis is one of the main topics of machine learning. Thus machine learning techniques play a key role in NIR based analytical approaches. Pre-processing of NIR spectral data has become an integral part of chemometrics modeling. The objective of the pre-processing is to remove physical phenomena (noise) in the spectra in order to improve the regression or classification model. In this work, we propose to reduce the noise using extreme learning machines which have shown good predictive performances in regression applications as well as in large dataset classification tasks. For this, we use a novel algorithm called C-PL-ELM, which has an architecture in parallel based on a non-linear layer in parallel with another non-linear layer. Using the soft margin loss function concept, we incorporate two Lagrange multipliers with the objective of including the noise of spectral data. Six real-life dataset were analyzed to illustrate the performance of the developed models. The results for regression and classification problems confirm the advantages of using the proposed method in terms of root mean square error and accuracy.  
  Address [Henriquez, Pablo A.; Ruz, Gonzalo A.] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Ave Diagonal Las Torres 2640, Santiago, Chile, Email: pabhenriquez@alumnos.uai.cl;  
  Corporate Author Thesis  
  Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0952-1976 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000459524300002 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 984  
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Author Hernandez, N.; Fuentes, A.; Reszka, P.; Fernandez-Pello, A.C. doi  openurl
  Title Piloted ignition delay times on optically thin PMMA cylinders Type Journal Article
  Year 2019 Publication Proceedings Of The Combustion Institute Abbreviated Journal Proc. Combust. Inst.  
  Volume 37 Issue 3 Pages 3993-4000  
  Keywords Integral heat equation; P-1 radiation model; Analytical model; Critical heat flux; Optically thin solids  
  Abstract The theory to predict ignition of solid fuels exposed to incident radiant heat fluxes has permitted to obtain simple correlations of the ignition delay time with the incident heat flux which are useful in practical engineering applications. However, the theory was developed under the assumption that radiation does not penetrate into the solid phase. In the case of semi-transparent solids, where the penetration of radiation plays an important role in the heating and subsequent ignition of the fuel, the predictions of the classical ignition theory are not applicable. A new theory for the piloted ignition of optically thin cylindrical fuels has been developed. The theory uses an integral method and an approximation of the radiative transfer equation within the solid to predict the heating of an inert solid. An exact and an approximate analytical solution are obtained. The predictions are compared with piloted ignition experiments of clear PMMA cylinders. The results indicate that for opticallythin media, the heating and ignition are not sensible to the thermal conductivity of the solid, they are highly dependent on the in-depth absorption coefficient. Using the approximate solution, the correlation 1/t(ig) proportional to (q)over dot(inc)'' was established. This correlation is adequate for engineering applications, and allows the estimation of effective properties of the solid fuel. The form of the correlation that was obtained is due to the integral method used in the solution of the heat equation, and does not imply that the semi-transparent solid behaves like a thermally thin material. The approximate solution presented in this article constitutes a useful tool for pencil-and-paper calculations and is an advancement in the understanding of solid-phase ignition processes. (C) 2018 The Combustion Institute. Published by Elsevier Inc. All rights reserved.  
  Address [Hernandez, N.; Fuentes, A.] Univ Tecn Feder Santa Maria, Dept Ind, Valparaiso, Chile, Email: pedro.reszka@uai.cl  
  Corporate Author Thesis  
  Publisher Elsevier Science Inc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1540-7489 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000456628600154 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 973  
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Author Hernandez, R.; Venegas, O. doi  openurl
  Title Distortion Theorems Associated with Schwarzian Derivative for Harmonic Mappings Type Journal Article
  Year 2019 Publication Complex Analysis And Operator Theory Abbreviated Journal Complex Anal. Oper. Theory  
  Volume 13 Issue 4 Pages 1783-1793  
  Keywords Schwarzian derivative; Harmonic mappings; Distortion theorems  
  Abstract Let f be a complex-valued harmonic mapping defined in the unit disc D. The theorems of Chuaqui and Osgood (J Lond Math Soc 2:289-298, 1993), which assert that the bounds of the size of the hyperbolic norm of the Schwarzian derivative for an analytic function f imply certain bounds for distortion and growth of f, are extended to the harmonic case.  
  Address [Hernandez, Rodrigo] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Av Padre Hurtado 750, Vina Del Mar, Chile, Email: rodrigo.hernandez@uai.cl;  
  Corporate Author Thesis  
  Publisher Springer Basel Ag Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1661-8254 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000469812800015 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1030  
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Author Hughes, S.; Moreno, S.; Yushimito, W.F.; Huerta-Canepa, G. doi  openurl
  Title Evaluation of machine learning methodologies to predict stop delivery times from GPS data Type Journal Article
  Year 2019 Publication Transportation Research Part C-Emerging Technologies Abbreviated Journal Transp. Res. Pt. C-Emerg. Technol.  
  Volume 109 Issue Pages 289-304  
  Keywords Machine learning; Stop delivery time; Classification; Regression; Hazard duration; GPS  
  Abstract In last mile distribution, logistics companies typically arrange and plan their routes based on broad estimates of stop delivery times (i.e., the time spent at each stop to deliver goods to final receivers). If these estimates are not accurate, the level of service is degraded, as the promised time window may not be satisfied. The purpose of this work is to assess the feasibility of machine learning techniques to predict stop delivery times. This is done by testing a wide range of machine learning techniques (including different types of ensembles) to (1) predict the stop delivery time and (2) to determine whether the total stop delivery time will exceed a predefined time threshold (classification approach). For the assessment, all models are trained using information generated from GPS data collected in Medellin, Colombia and compared to hazard duration models. The results are threefold. First, the assessment shows that regression-based machine learning approaches are not better than conventional hazard duration models concerning absolute errors of the prediction of the stop delivery times. Second, when the problem is addressed by a classification scheme in which the prediction is aimed to guide whether a stop time will exceed a predefined time, a basic K-nearest-neighbor model outperforms hazard duration models and other machine learning techniques both in accuracy and F-1 score (harmonic mean between precision and recall). Third, the prediction of the exact duration can be improved by combining the classifiers and prediction models or hazard duration models in a two level scheme (first classification then prediction). However, the improvement depends largely on the correct classification (first level).  
  Address [Hughes, Sebastian; Moreno, Sebastian; Yushimito, Wilfredo F.; Huerta-Canepa, Gonzalo] Univ Adolfo Ibanez, Fac Engn & Sci, Vina Del Mar, Chile, Email: shughes@alumnos.uai.cl;  
  Corporate Author Thesis  
  Publisher Pergamon-Elsevier Science Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0968-090x ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000504780800016 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1082  
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Author Jara-Munoz, P.; Guzman-Fierro, V.; Arriagada, C.; Campos, V.; Campos, J.L.; Gallardo-Rodriguez, J.J.; Fernandez, K.; Roeckel, M. doi  openurl
  Title Low oxygen start-up of partial nitrification-anammox process: mechanical or gas agitation? Type Journal Article
  Year 2019 Publication Journal Of Chemical Technology And Biotechnology Abbreviated Journal J. Chem. Technol. Biotechnol.  
  Volume 94 Issue 2 Pages 475-483  
  Keywords mechanical agitation; partial nitrification anammox; dissolved oxygen; gas agitation; granule  
  Abstract BACKGROUND Partial nitrification-anammox (PN-A) is a widely recognized technology to remove nitrogen from different types of wastewater. Low oxygen concentration is the most used strategy for PN-A start-up, but stability problems arise during the operation; thus, in the present study the effects of the type of agitation, oxygenation and shear stress on the sensitivity, energy consumption and performance were evaluated. Recognition of these parameters allows considered choice of the design of an industrial process for nitrogen abatement. RESULTS A mechanically agitated reactor (MAR) was compared to a stable, long-term operation period bubble column reactor (BCR), both started under low dissolved oxygen concentration conditions. MAR microbial assays confirmed the destruction of the nitrifying layer and an imbalance of the entire process when the oxygen to nitrogen loading ratio (O-2:N) decreased by 25%. The granule sedimentation rate and specific anammox activity were 17% and 87% higher (respectively) in BCR. Economic analysis determined that the cost of aeration for the MAR and for the BCR were 23.8% and 1% of the total PN-A energy consumption, respectively. CONCLUSIONS The BCR showed better results than the MAR. This study highlights the importance of type of agitation, oxygenation and shear stress for industrial-scale PN-A designs. (c) 2018 Society of Chemical Industry  
  Address [Jara-Munoz, Pamela; Guzman-Fierro, Victor; Arriagada, Constanza; Jose Gallardo-Rodriguez, Juan; Fernandez, Katherina; Roeckel, Marlene] Univ Concepcion, Dept Chem Engn, Fac Engn, Concepcion, Chile, Email: mroeckel@udec.cl  
  Corporate Author Thesis  
  Publisher Wiley Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0268-2575 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000455262100014 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 972  
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Author Jarur, M.C.; Dumais, J.; Rica, S. doi  openurl
  Title Limiting speed for jumping Type Journal Article
  Year 2019 Publication Comptes Rendus Mecanique Abbreviated Journal C. R. Mec.  
  Volume 347 Issue 4 Pages 305-317  
  Keywords Jumping; Take-off velocity; Locomotion; Limiting speed; Biomechanics  
  Abstract General mechanical considerations provide an upper bound for the take-off velocity of any jumper, animate or inanimate, rigid or soft body, animal or vegetal. The take-off velocity is driven by the ratio of released energy to body mass. Further, the mean reaction force on a rigid platform during push-off is inversely proportional to the characteristic size of the jumper. These general considerations are illustrated in the context of Alexander's jumper model, which can be solved exactly and which shows an excellent agreement with the mechanical results. (C) 2019 Academie des sciences. Published by Elsevier Masson SAS. All rights reserved.  
  Address [Jarur, Mary Carmen] Univ Catolica Maule, Talca, Chile, Email: mjarur@ucm.cl;  
  Corporate Author Thesis  
  Publisher Elsevier France-Editions Scientifiques Medicales Elsevier Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1631-0721 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000466032600005 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1163  
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Author Kossakowski, D.; Espinoza, N.; Brahm, R.; Jordan, A.; Henning, T.; Rojas, F.; Kurster, M.; Sarkis, P.; Schlecker, M.; Pozuelos, F.J.; Barkaoui, K.; Jehin, E.; Gillon, M.; Matthews, E.; Horch, E.P.; Ciardi, D.R.; Crossfield, I.J.M.; Gonzales, E.; Howell, S.B.; Matson, R.; Schlieder, J.; Jenkins, J.; Ricker, G.; Seager, S.; Winn, J.N.; Li, J.; Rose, M.E.; Smith, J.C.; Dynes, S.; Morgan, E.; Villasenor, J.N.; Charbonneau, D.; Jaffe, T.; Yu, L.; Bakos, G.; Bhatti, W.; Bouchy, F.; Collins, K.A.; Collins, K.I.; Csubry, Z.; Evans, P.; Jensen, E.L.N.; Lovis, C.; Marmier, M.; Nielsen, L.D.; Osip, D.; Pepe, F.; Relles, H.M.; Segransan, D.; Shporer, A.; Stockdale, C.; Suc, V.; Turner, O.; Udry, S. doi  openurl
  Title TOI-150b and TOI-163b: two transiting hot Jupiters, one eccentric and one inflated, revealed by TESS near and at the edge of the JWST CVZ Type Journal Article
  Year 2019 Publication Monthly Notices Of The Royal Astronomical Society Abbreviated Journal Mon. Not. Roy. Astron. Soc.  
  Volume 490 Issue 1 Pages 1094-1110  
  Keywords techniques: photometric; planets and satellites: detection; stars: individual: HD271181; stars: individual: TIC 179317684; stars: individual: TIC 271893367; stars: individual: TYC9191-519-1  
  Abstract We present the discovery of TYC9191-519-1b (TOI-150b, TIC 271893367) and HD271181b (TOI-163b, TIC 179317684), two hot Jupiters initially detected using 30-min cadence Transiting Exoplanet Survey Satellite (TESS) photometry from Sector 1 and thoroughly characterized through follow-up photometry (CHAT, Hazelwood, LCO/CTIO, El Sauce, TRAPPIST-S), high-resolution spectroscopy (FEROS, CORALIE), and speckle imaging (Gemini/DSSI), confirming the planetary nature of the two signals. A simultaneous joint fit of photometry and radial velocity using a new fitting package JULIET reveals that TOI-150b is a 1.254 +/- 0.016 R-J, massive (2.61(-0.12)(+0.19) M-J) hot Jupiter in a 5.857-d orbit, while TOI-163b is an inflated (R-P = 1.478(-0.029)(+0.022) R-J, M-P = 1.219 +/- 0.11 M-J) hot Jupiter on a P = 4.231-d orbit; both planets orbit F-type stars. A particularly interesting result is that TOI-150b shows an eccentric orbit (e = 0.262(-0.037)(+0.045)), which is quite uncommon among hot Jupiters. We estimate that this is consistent, however, with the circularization time-scale, which is slightly larger than the age of the system. These two hot Jupiters are both prime candidates for further characterization – in particular, both are excellent candidates for determining spin-orbit alignments via the Rossiter-McLaughlin (RM) effect and for characterizing atmospheric thermal structures using secondary eclipse observations considering they are both located closely to the James Webb Space Telescope (JWST) Continuous Viewing Zone (CVZ).  
  Address [Kossakowski, Diana; Espinoza, Nestor; Henning, Thomas; Kuerster, Martin; Sarkis, Paula; Schlecker, Martin] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany, Email: kossakowski@mpia.dc  
  Corporate Author Thesis  
  Publisher Oxford Univ Press Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0035-8711 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000496922300078 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1076  
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Author Lagos, R.; Canessa, E.; Chaigneau, S.E. doi  openurl
  Title Modeling stereotypes and negative self-stereotypes as a function of interactions among groups with power asymmetries Type Journal Article
  Year 2019 Publication Journal For The Theory Of Social Behaviour Abbreviated Journal J. Theory Soc. Behav.  
  Volume 49 Issue 3 Pages 312-333  
  Keywords negative self-; stereotypes; agent based simulation; social power; stereotypes  
  Abstract Stereotypes is one of the most researched topics in social psychology. Within this context, negative self-stereotypes pose a particular challenge for theories. In the current work, we propose a model that suggests that negative self-stereotypes can theoretically be accounted for by the need to communicate in a social system made up by groups with unequal power. Because our theory is dynamic, probabilistic, and interactionist, we use a computational simulation technique to show that the proposed model is able to reproduce the phenomenon of interest, to provide novel accounts of related phenomena, and to suggest novel empirical predictions. We describe our computational model, our variables' dynamic behavior and interactions, and link our analyses to the literature on stereotypes and self-stereotypes, the stability of stereotypes (in particular, gender and racial stereotypes), the effects of power asymmetries, and the effects of intergroup contact.  
  Address [Lagos, Rodrigo] Univ Chile, Programa Magister Bioestadist, Santiago, Chile, Email: sergio.chaigneau@uai.cl  
  Corporate Author Thesis  
  Publisher Wiley Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0021-8308 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000483671300004 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1049  
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Author Liedloff, M.; Montealegre, P.; Todinca, I. doi  openurl
  Title Beyond Classes of Graphs with “Few” Minimal Separators: FPT Results Through Potential Maximal Cliques Type Journal Article
  Year 2019 Publication Algorithmica Abbreviated Journal Algorithmica  
  Volume 81 Issue 3 Pages 986-1005  
  Keywords FPT algorithms; Treewidth; Potential maximal cliques  
  Abstract Let P(G,X) be a property associating a boolean value to each pair (G,X) where G is a graph and X is a vertex subset. Assume that P is expressible in counting monadic second order logic (CMSO) and let t be an integer constant. We consider the following optimization problem: given an input graph G=(V,E), find subsets XFV such that the treewidth of G[F] is at most t, property P(G[F],X) is true and X is of maximum size under these conditions. The problem generalizes many classical algorithmic questions, e.g., Longest Induced Path, Maximum Induced Forest, IndependentH-Packing, etc. Fomin et al. (SIAM J Comput 44(1):54-87, 2015) proved that the problem is polynomial on the class of graph Gpoly, i.e. the graphs having at most poly(n) minimal separators for some polynomial poly. Here we consider the class Gpoly+kv, formed by graphs of Gpoly to which we add a set of at most k vertices with arbitrary adjacencies, called modulator. We prove that the generic optimization problem is fixed parameter tractable on Gpoly+kv, with parameter k, if the modulator is also part of the input.  
  Address [Liedloff, Mathieu; Todinca, Ioan] Univ Orleans, INSA Ctr Val Loire, LIFO, EA 4022, Orleans, France, Email: mathieu.liedloff@univ-orleans.fr;  
  Corporate Author Thesis  
  Publisher Springer Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0178-4617 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000460105700003 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 989  
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Author Lopez, D.; Leiva, A.M.; Arismendi, W.; Vidal, G. doi  openurl
  Title Influence of design and operational parameters on the pathogens reduction in constructed wetland under the climate change scenario Type Journal Article
  Year 2019 Publication Reviews In Environmental Science And Bio-Technology Abbreviated Journal Rev. Environ. Sci. Bio-Technol.  
  Volume 18 Issue 1 Pages 101-125  
  Keywords Total and fecal coliform; Constructed wetlands; Climate change; Principal component analyses; Wastewater reuse  
  Abstract Under the climate change scenario, constructed wetlands (CWs) as an engineered system for treating domestic wastewater will face different challenges. Some of them are: (a) the increase of pathogens concentration in wastewater due to the rise of global temperature; (b) higher precipitation that can cause an increase of pathogens due to runoff; (c) the reuse of treated wastewater related to the water scarcity. These problems can affect the capacity of CWs for removal pathogens. In this context, the objective of this review is to provide an overview of the influence of design and operational parameters on pathogens reduction in CWs. To accomplish with this purpose, the published information (>30 studies) about the reduction of pathogens and the operational and design parameters in different CWs configurations and were gathered. With this data, statistical analyses were performed considering the most relevant variables which significantly influence the removal of pathogens in CWs. For this, principal component analyses (PCA) were achieved for determining, separately, the correlation of operational parameters with fecal coliform (FC) and total coliform (TC) removal. The results of PCA showed that FC and TC were correlated positively with mass removal rates of chemical oxygen demand (COD) and biological oxygen Demand (BOD5), total suspended solids (TSS) removal and the size of support medium. This study is the first approach that analyzes together the design and operational parameters which influence the pathogen removal in CWs. For this reason, these parameters and the increase on microorganism concentrations due to the climate change have to be considered for the future design of CWs.  
  Address [Lopez, D.; Leiva, A. M.; Arismendi, W.; Vidal, G.] Univ Concepcion, Environm Sci Fac, Engn & Environm Biotechnol Grp, Concepcion, Chile, Email: glvidal@udec.cl  
  Corporate Author Thesis  
  Publisher Springer Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1569-1705 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000459408200005 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 980  
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Author MacLean, S.; Montalva-Medel, M.; Goles, E. doi  openurl
  Title Block invariance and reversibility of one dimensional linear cellular automata Type Journal Article
  Year 2019 Publication Advances In Applied Mathematics Abbreviated Journal Adv. Appl. Math.  
  Volume 105 Issue Pages 83-101  
  Keywords Cellular automata; Linear cellular automata; Block invariance; Reversibility  
  Abstract Consider a one-dimensional, binary cellular automaton f (the CA rule), where its n nodes are updated according to a deterministic block update (blocks that group all the nodes and such that its order is given by the order of the blocks from left to right and nodes inside a block are updated synchronously). A CA rule is block invariant over a family F of block updates if its set of periodic points does not change, whatever the block update of F is considered. In this work, we study the block invariance of linear CA rules by means of the property of reversibility of the automaton because such a property implies that every configuration has a unique predecessor, so, it is periodic. Specifically, we extend the study of reversibility done for the Wolfram elementary CA rules 90 and 150 as well as, we analyze the reversibility of linear rules with neighbourhood radius 2 by using matrix algebra techniques. (C) 2019 Elsevier Inc. All rights reserved.  
  Address [MacLean, Stephanie; Montalva-Medel, Marco; Goles, Eric] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Diagonal Torres 2640, Penalolen, Chile, Email: stephanie.macleank@edu.uai.cl;  
  Corporate Author Thesis  
  Publisher Academic Press Inc Elsevier Science Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0196-8858 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000459528000004 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 983  
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Author Markou, G.; Genco, F. pdf  doi
openurl 
  Title Seismic assessment of small modular reactors: NuScale case study for the 8.8 Mw earthquake in Chile Type Journal Article
  Year 2019 Publication Nuclear Engineering And Design Abbreviated Journal Nucl. Eng. Des.  
  Volume 342 Issue Pages 176-204  
  Keywords Small Modular Reactors; Chile 2050 energy policy; 3D Detailed Finite Element Modeling; Seismic resistance; Soil-Structure Interaction; Reinforced concrete  
  Abstract Reducing greenhouse gas emissions and improving energy production sustainability is a paramount of Chile's 2050 energy policy. This though, is difficult to achieve without some degree of nuclear power involvement, given that the geography of the country consists of many areas that are practically off-grid, whereas cannot be developed and financially exploited due to the lack of basic commodities such as water and electricity. Recently small modular reactors (SMRs) have gained lots of attention by both researchers and world policy makers for their promised capabilities of enhanced safety systems, affordable costs and competitive scalability. SMRs can be located in remote areas and at this time are being actively developed in Argentina, USA, Brazil, Russia, China, South Korea, Japan, India and South Africa. Chile's 2010 earthquake and Fukushima's 2011 nuclear disaster have increased significantly both the population's fear and opposition to Nuclear Power Energy for the possible consequences of radiation on the lives of people. This paper aims to study the seismic resistance of a typical nuclear structure, being at time proposed in Small Modular Reactors, by using earthquake conditions typically seen in Chile. Since many designs are under study, a NuScale reactor from USA is analyzed under these extreme loading conditions. The major advantages of the NuScale reactor are in the power scalability (it can go from 1 to 12 reactor cores producing from 60 to 720 MWe), limited nuclear fuel concentration, modules allocated below grade and high strength steel containments fully immersed in water. The cooling effect beyond Design Basis Accident is ensured indefinitely, which induces a significant safety factor in the case of an accident. For the purpose of this study a detailed 3D detailed structural model was developed, reproducing the NuScale reactor's reinforced concrete framing system, where nonlinear analyses was performed to assess the overall mechanical response of the structure. The framing system has been tested under high seismic excitations typically seen in Chile (Mw > 8.0), showing high resistance and capability to cope with the developed forces due to its design. Based on a Soil-Structure Interaction analysis, it was also found that the NuScale framing system manages to maintain a low-stress level at the interaction surface between the foundation and the soil, where the structural system was found to be able to withstand significant earthquake loads. Finally, further investigation is deemed necessary in order to study the potential damages of the structure in the case of other hazards such as tsunami events, blast loads, etc.  
  Address [Markou, George] Univ Pretoria, Dept Civil Engn, Pretoria, South Africa, Email: george.markou@up.ac.za;  
  Corporate Author Thesis  
  Publisher Elsevier Science Sa Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0029-5493 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000454924700016 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 968  
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Author Matus, O.; Barrera, J.; Moreno, E.; Rubino, G. pdf  doi
openurl 
  Title On the Marshall-Olkin Copula Model for Network Reliability Under Dependent Failures Type Journal Article
  Year 2019 Publication IEEE Transactions On Reliability Abbreviated Journal IEEE Trans. Reliab.  
  Volume 68 Issue 2 Pages 451-461  
  Keywords Copula theory; failure analysis; network design; optimization methods; reliability  
  Abstract The Marshall-Olkin (MO) copulamodel has emerged as the standard tool for capturing dependence between components in failure analysis in reliability. In this model, shocks arise at exponential random times, that affect one or several components inducing a natural correlation in the failure process. However, because the number of parameter of the model grows exponentially with the number of components, MO suffers of the “curse of dimensionality.” MO models are usually intended to be applied to design a network before its construction; therefore, it is natural to assume that only partial information about failure behavior can be gathered, mostly from similar existing networks. To construct such an MO model, we propose an optimization approach to define the shock's parameters in the MO copula, in order to match marginal failures probabilities and correlations between these failures. To deal with the exponential number of parameters of this problem, we use a column-generation technique. We also discuss additional criteria that can be incorporated to obtain a suitable model. Our computational experiments show that the resulting MO model produces a close estimation of the network reliability, especially when the correlation between component failures is significant.  
  Address [Matus, Omar; Barrera, Javiera; Moreno, Eduardo] Univ Adolfo Ibanez, Fac Engn & Sci, Santiago 7941169, Chile, Email: omar.matus@edu.uai.cl;  
  Corporate Author Thesis  
  Publisher Ieee-Inst Electrical Electronics Engineers Inc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0018-9529 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000470826100005 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1027  
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Author Mondschein, S.; Yankovic, N.; Matus, O. doi  openurl
  Title Age-dependent optimal policies for hepatitis C virus treatment Type Journal Article
  Year 2019 Publication International Transactions In Operational Research Abbreviated Journal Int. Trans. Oper. Res.  
  Volume to appear Issue Pages 27 pp  
  Keywords dynamic programming; public health; hepatitis C virus  
  Abstract In recent years, highly effective treatments for hepatitis C virus (HCV) have become available. However, high prices of new treatments call for a careful policy evaluation when considering economic constraints. Although the current medical advice is to administer the new therapies to all patients, economic and capacity constraints require an efficient allocation of these scarce resources. We use stochastic dynamic programming to determine the optimal policy for prescribing the new treatment based on the age and disease progression of the patient. We show that, in a simplified version of the model, new drugs should be administered to patients at a given level of fibrosis if they are within prespecified age limits; otherwise, a conservative approach of closely monitoring the evolution of the patient should be followed. We use a cohort of Spanish patients to study the optimal policy regarding costs and health indicators. For this purpose, we compare the performance of the optimal policy against a liberal policy of treating all sick patients. In this analysis, we achieve similar results in terms of the number of transplants, HCV-related deaths, and quality of adjusted life years, with a significant reduction in overall expenditure. Furthermore, the budget required during the first year of implementation when using the proposed methodology is only 12% of that when administering the treatment to all patients at once. Finally, we propose a method to prioritize patients when there is a shortage (surplus) in the annual budget constraint and, therefore, some recommended treatments must be postponed (added).  
  Address [Mondschein, Susana; Matus, Omar] Univ Adolfo Ibanez, Fac Ingn, Diagonal Las Torres 2640, Santiago 755000, Chile, Email: susana.mondschein@uai.cl;  
  Corporate Author Thesis  
  Publisher Wiley Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0969-6016 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000481229600001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1041  
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Author Nasirov, S.; Cruz, E.; Agostini, C.A.; Silva, C. pdf  doi
openurl 
  Title Policy Makers' Perspectives on the Expansion of Renewable Energy Sources in Chile's Electricity Auctions Type Journal Article
  Year 2019 Publication Energies Abbreviated Journal Energies  
  Volume 12 Issue 21 Pages 17 pp  
  Keywords renewable energy; auctions; regulator's perspective; Chile  
  Abstract Chile has become one of the first few countries where renewable sources compete directly with conventional generation in price-based auctions. Moreover, the results of energy auctions during the last few years show a remarkable transition from conventional fossil fuels to renewable energies. In fact, the energy auction in 2017, to provide energy to customers from distribution companies, achieved a massive expansion in renewable technology at one of the lowest prices in the world. These positive results prompted the question if such results were permanent or temporal due to factors with limited effects. In this regard, this paper studies the key factors that drove the significant rise of renewable technologies in Chilean energy auctions, obtaining valuable lessons for regulators, not only in Chile, but also in the region and the world. For this purpose, we considered a well-proven method based on a hybrid multicriteria decision-making model to examine and prioritize the main drivers of the expansion of renewables in auctions. The results showed that some specific characteristics of the auction design, particularly the hourly supply blocks, the lead time for project construction, and contract duration, were the most significant drivers for the expansion of renewables in energy auctions. Moreover, the results showed that, provided that the auction design accommodates for such drivers, solar energy ends up as the most attractive technology in the Chilean auctions. The research also shows the main findings are robust by the application of a probabilistic sensitivity analysis.  
  Address [Nasirov, Shahriyar; Cruz, Eugenio; Silva, Carlos] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Ave Diagonal Las Torres 2640, Santiago 7941169, Chile, Email: shahriyar.nasirov@uai.cl;  
  Corporate Author Thesis  
  Publisher Mdpi Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1996-1073 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000512340000128 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1103  
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Author Navarro, H.; Marco, L.M.; Araneda, A.A.; Bennun, L. doi  openurl
  Title Spatial distribution of Si in Pinus Insigne (Pinus radiata) Wood using micro XRF by Synchrotron Radiation Type Journal Article
  Year 2019 Publication Journal Of Wood Chemistry And Technology Abbreviated Journal J. Wood Chem. Technol.  
  Volume 39 Issue 3 Pages 187-198  
  Keywords Dendrochemical study; Pinus insigne; silicon content; synchrotron radiation; mu XRF  
  Abstract Silicon, while not an essential element, is known to have positive roles in certain vegetable species. For instance, it has been recognized to protect them from biotic and abiotic stress. Due to the fact that certain species accumulate the aforementioned element in their tissues, the determination of its concentration is of importance in different disciplines, such as dendrology, plant physiology, forest management, agroecology, and also in the wood industry. Usually, its quantification is preceded by a series of digestion steps that, aside from been time-consuming, and contamination-prone, prevents from conducting a spatial distribution of the element on the sample. In this research, samples of Pinus radiata wood were studied using a synchrotron radiation source that allowed direct scanning of its surface without any treatment, and the determination of silicon as a function of the position and the tree rings, using micro X-ray fluorescence (mu XRF). A quantification method based in the fundamental parameters approach was evaluated. It was found that silicon concentration increases near the latewood ring zones, showing a periodical behavior, related to seasonal environmental events.  
  Address [Navarro, Henry] Univ Nacl Cuyo, Inst Balseiro, San Carlos De Bariloche, Rio Negro, Argentina, Email: lbennun@udec.cl  
  Corporate Author Thesis  
  Publisher Taylor & Francis Inc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0277-3813 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000467859800004 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1000  
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Author O' Ryan, R.; Benavides, C.; Diaz, M.; San Martin, J.P.; Mallea, J. doi  openurl
  Title Using probabilistic analysis to improve greenhouse gas baseline forecasts in developing country contexts: the case of Chile Type Journal Article
  Year 2019 Publication Climate Policy Abbreviated Journal Clim. Policy  
  Volume 19 Issue 3 Pages 299-314  
  Keywords Energy systems modelling; uncertainty; climate change policy; probabilistic analysis; emission baselines; nationally determined contributions  
  Abstract In this paper, initial steps are presented toward characterizing, quantifying, incorporating and communicating uncertainty applying a probabilistic analysis to countrywide emission baseline forecasts, using Chile as a case study. Most GHG emission forecasts used by regulators are based on bottom-up deterministic approaches. Uncertainty is usually incorporated through sensitivity analysis and/or use of different scenarios. However, much of the available information on uncertainty is not systematically included. The deterministic approach also gives a wide range of variation in values without a clear sense of probability of the expected emissions, making it difficult to establish both the mitigation contributions and the subsequent policy prescriptions for the future. To improve on this practice, we have systematically included uncertainty into a bottom-up approach, incorporating it in key variables that affect expected GHG emissions, using readily available information, and establishing expected baseline emissions trajectories rather than scenarios. The resulting emission trajectories make explicit the probability percentiles, reflecting uncertainties as well as possible using readily available information in a manner that is relevant to the decision making process. Additionally, for the case of Chile, contradictory deterministic results are eliminated, and it is shown that, whereas under a deterministic approach Chile's mitigation ambition does not seem high, the probabilistic approach suggests this is not necessarily the case. It is concluded that using a probabilistic approach allows a better characterization of uncertainty using existing data and modelling capacities that are usually weak in developing country contexts. Key policy insights Probabilistic analysis allows incorporating uncertainty systematically into key variables for baseline greenhouse gas emission scenario projections. By using probabilistic analysis, the policymaker can be better informed as to future emission trajectories. Probabilistic analysis can be done with readily available data and expertise, using the usual models preferred by policymakers, even in developing country contexts.  
  Address [O' Ryan, Raul] Univ Adolfo Ibanez, Fac Engn & Sci, EARTH Ctr, Santiago, Chile, Email: mdiaz@centroenergia.cl  
  Corporate Author Thesis  
  Publisher Taylor & Francis Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1469-3062 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000455949300003 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1164  
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Author Osorio, H.; Nasirov, S.; Agostini, C.A.; Silva, C. pdf  doi
openurl 
  Title Assessing the economic viability of energy storage systems in the Chilean electricity system: An empirical analysis from arbitrage revenue perspectives Type Journal Article
  Year 2019 Publication Journal of Renewable and Sustainable Energy Abbreviated Journal J. Renew. Sustain. Energy  
  Volume 11 Issue 1 Pages 015901  
  Keywords  
  Abstract The emergence of high penetration rates of renewable energies in power systems presents a serious challenge in energy generation and load balance maintenance to ensure power network stability and reliability. Energy Storage Systems (ESSs) could play a relevant role in facing these challenges, as the technologies have passed the demo and prototype phases to a wide market implementation phase. The only remaining barrier for their implementation is their cost, but even this barrier is quickly disappearing. In this paper, we address the financial feasibility of storage technologies in electricity systems. In particular, we evaluate whether such technologies are economically sustainable and how far they are from becoming viable. For this purpose, we consider the Chilean electricity system and evaluate the maximum possible arbitrage revenues that could be achieved under ESS through benefiting from energy time shift, diminishing of transmission losses, and transmission upgrade deferral. The results show that the arbitrage revenues are still below the cost of storage systems. Further improvement in storage efficiency or a decrease in the cost of storage systems is still needed to make this type of investment financially viable in the near future.  
  Address  
  Corporate Author Thesis  
  Publisher American Institute of Physics Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1941-7012 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000460093400042 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 957  
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