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Author Agostini, C.A.; Guzman, A.M.; Nasirov, S.; Silva, C. pdf  doi
openurl 
  Title A surplus based framework for cross-border electricity trade in South America Type Journal Article
  Year 2019 Publication Energy Policy Abbreviated Journal Energy Policy  
  Volume 128 Issue Pages 673-684  
  Keywords Electricity regulation; Import/export of electricity; South America; Chile  
  Abstract The South American region has experienced a steady increase in its demand for electricity and faces several challenges in the development of the electricity sector. Among them, high fluctuations in hydro generation, high and volatile prices of fossil fuels, and environmental and social impacts associated to energy activities. Strengthening cooperation for cross-border electricity trade is considered a sustainable alternative for addressing these challenges. For the expansion of electricity trade among countries within the region, both infrastructure and a regulation that defines the conditions of the electric power exchanges between countries are required. A good regulatory framework would allow all market players to have access to the commercialization of energy with other countries in the region, guarantee that the treatment of exchanges is non-discriminatory, and maintain the efficiency, cost effectiveness and security characteristics operation of all electricity systems. In this context, this paper proposes a framework with the basic setting conditions for the import and export of energy from the “surplus” available for exchange. The empirical analysis of the regulatory proposal, based on simulations, shows that the exchange of energy from Chile with its neighboring countries is feasible in a clear and transparent manner, reducing the marginal costs of energy and the total cost of operation, keeping the average cost of generation relatively constant.  
  Address [Agostini, Claudio A.] Univ Adolfo Ibanez, Sch Govt, Santiago, Chile, Email: Claudio.agostini@uai.cl;  
  Corporate Author Thesis  
  Publisher Elsevier Sci Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0301-4215 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000463688800064 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 995  
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Author Alejo, L.; Atkinson, J.; Arriagada, C.; Guzman-Fierro, V.; Roeckel, M. pdf  doi
openurl 
  Title Effluent composition prediction of a two-stage anaerobic digestion process: machine learning and stoichiometry techniques (vol 25, pg 21149, 2018) Type Miscellaneous
  Year 2019 Publication Environmental Science And Pollution Research Abbreviated Journal Environ. Sci. Pollut. Res.  
  Volume 26 Issue 5 Pages 5234-5234  
  Keywords  
  Abstract The original publication of this paper contains a mistake. Unfortunately, an author was inadvertently missed out, Constanza Arriagada had participated in the operation of the anaerobic digesters cited in the work and now as a PhD student, she is involved in the production of other publication.  
  Address [Alejo, Luz; Arriagada, Constanza; Guzman-Fierro, Victor; Roeckel, Marlene] Univ Concepcion, Dept Ingn Quim, Victor Lamas 1290,Casilla 160-C Correo 3, Concepcion, Chile, Email: john.atkinson@uai.cl;  
  Corporate Author Thesis  
  Publisher Springer Heidelberg Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0944-1344 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000458990300090 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 982  
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Author Alvarez-Miranda, E.; Pereira, J. doi  openurl
  Title On the complexity of assembly line balancing problems Type Journal Article
  Year 2019 Publication Computers & Operations Research Abbreviated Journal Comput. Oper. Res.  
  Volume 108 Issue Pages 182-186  
  Keywords Line balancing; Complexity; Bin packing  
  Abstract Assembly line balancing is a family of combinatorial optimization problems that has been widely studied in the literature due to its simplicity and industrial applicability. Most line balancing problems are NP-hard as they subsume the bin packing problem as a special case. Nevertheless, it is common in the line balancing literature to cite [A. Gutjahr and G. Nemhauser, An algorithm for the line balancing problem, Management Science 11 (1964) 308-315] in order to assess the computational complexity of the problem. Such an assessment is not correct since the work of Gutjahr and Nemhauser predates the concept of NP-hardness. This work points at over 50 publications since 1995 with the aforesaid error. (C) 2019 Elsevier Ltd. All rights reserved.  
  Address [Alvarez-Miranda, Eduardo] Univ Talca, Dept Ind Engn, Curico, Chile, Email: jorge.pereira@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 0305-0548 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000471733300014 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1015  
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Author Araya-Letelier, G.; Concha-Riedel, J.; Antico, F.C.; Sandoval, C. pdf  doi
openurl 
  Title Experimental mechanical-damage assessment of earthen mixes reinforced with micro polypropylene fibers Type Journal Article
  Year 2019 Publication Construction And Building Materials Abbreviated Journal Constr. Build. Mater.  
  Volume 198 Issue Pages 762-776  
  Keywords Micro polypropylene fibers; Fiber-reinforced earthen mixes; Conservation; Impact strength; Damage  
  Abstract The addition of engineered polypropylene fibers to earthen materials offers new opportunities to control their damage evolution and mechanical properties that altogether provides more reliability and extends the life span of these materials. The latter is of special interest considering that earthen materials are still widely used in the form of adobe blocks for earthen masonry, cob, rammed earth or even earthen mortars for new construction and conservation of historic buildings. In this work, the effect of dosage of micro polypropylene fibers (MPPF) in the damage-mechanical performance of earthen mixes is studied experimentally. Part of the experiments includes two different tests to assess distributed and localized cracking of reinforced earth subject to restrained drying shrinkage. In addition, the experimental results showed that the incorporation of MPPF increases up to 83 times the impact strength and 11 times the flexural toughness of earthen mixes. Other mechanical properties such as compressive and flexural strength are not statistically affected by the incorporation of MPPF. (C) 2018 Elsevier Ltd. All rights reserved.  
  Address [Araya-Letelier, G.] Pontificia Univ Catolica Chile, Escuela Construcc Civil, Casilla 306,Correo 22, Santiago, Chile, Email: gerardo.araya@uc.cl;  
  Corporate Author Thesis  
  Publisher Elsevier Sci Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0950-0618 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000457952200066 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 978  
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Author Araya-Letelier, G.; Maturana, P.; Carrasco, M.; Antico, F.C.; Gomez, M.S. pdf  doi
openurl 
  Title Mechanical-Damage Behavior of Mortars Reinforced with Recycled Polypropylene Fibers Type Journal Article
  Year 2019 Publication Sustainability Abbreviated Journal Sustainability  
  Volume 11 Issue 8 Pages 17 pp  
  Keywords recycled polypropylene fiber; fiber-reinforced mortar; mechanical performance; damage reduction; waste valorization  
  Abstract Commercial polypropylene fibers are incorporated as reinforcement of cement-based materials to improve their mechanical and damage performances related to properties such as tensile and flexural strength, toughness, spalling and impact resistance, delay formation of cracks and reducing crack widths. Yet, the production of these polypropylene fibers generates economic costs and environmental impacts and, therefore, the use of alternative and more sustainable fibers has become more popular in the research materials community. This paper addresses the characterization of recycled polypropylene fibers (RPFs) obtained from discarded domestic plastic sweeps, whose morphological, physical and mechanical properties are provided in order to assess their implementation as fiber-reinforcement in cement-based mortars. An experimental program addressing the incorporation of RPFs on the mechanical-damage performance of mortars, including a sensitivity analysis on the volumes and lengths of fiber, is developed. Using analysis of variance, this paper shows that RPFs statistically enhance flexural toughness and impact strength for high dosages and long fiber lengths. On the contrary, the latter properties are not statistically modified by the incorporation of low dosages and short lengths of RPFs, but still in these cases the incorporation of RPFs in mortars have the positive environmental impact of waste encapsulation. In the case of average compressive and flexural strength of mortars, these properties are not statistically modified when adding RPFs.  
  Address [Araya-Letelier, Gerardo; Maturana, Pablo; Soledad Gomez, Maria] Pontificia Univ Catolica Chile, Escuela Construcc Civil, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile, Email: gerardo.araya@uc.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 2071-1050 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000467752200013 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1001  
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Author Araya-Letelier, G.; Parra, P.F.; Lopez-Garcia, D.; Garcia-Valdes, A.; Candia, G.; Lagos, R. pdf  doi
openurl 
  Title Collapse risk assessment of a Chilean dual wall-frame reinforced concrete office building Type Journal Article
  Year 2019 Publication Engineering Structures Abbreviated Journal Eng. Struct.  
  Volume 183 Issue Pages 770-779  
  Keywords Collapse assessment; Chilean code-conforming building; Incremental dynamic analyses; Seismic hazard models  
  Abstract Several code-conforming reinforced concrete buildings were severely damaged during the 2010 moment magnitude (M-w) 8.8 Chile earthquake, raising concerns about their real collapse margin. Although critical updates were introduced into the Chilean design codes after 2010, guidelines for collapse risk assessment of Chilean buildings remain insufficient. This study evaluates the collapse potential of a typical dual system (shear walls and moment frames) office building in Santiago. Collapse fragility functions were obtained through incremental dynamic analyses using a state-of-the-art finite element model of the building. Site-specific seismic hazard curves were developed, which explicitly incorporated epistemic uncertainty, and combined with the collapse fragility functions to estimate the mean annual frequency of collapse (lambda(c)) values and probabilities of collapse in 50-years (P-c(50)). Computed values of lambda(c) and P-c(50) were on the order of 10(-5)-10(-4), and 0.1-0.7%, respectively, consistent with similar studies developed for buildings in the US. The results also showed that the deaggregation of lambda(c) was controlled by small to medium earthquake intensities and that different models of the collapse fragility functions and hazard curves had a non-negligible effect on lambda(c) and P-c(50), and thus, propagation of uncertainty in risk assessment problems must be adequately taken into account.  
  Address [Araya-Letelier, G.] Pontificia Univ Catolica Chile, Escuela Construcc Civil, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile, Email: gerardo.araya@uc.cl;  
  Corporate Author Thesis  
  Publisher Elsevier Sci Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0141-0296 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000462690000055 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 994  
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Author Arbelaez, H.; Hernandez, R.; Sierra, W. doi  openurl
  Title Normal harmonic mappings Type Journal Article
  Year 2019 Publication Monatshefte Fur Mathematik Abbreviated Journal Mon.heft. Math.  
  Volume 190 Issue 3 Pages 425-439  
  Keywords Harmonic mappings; Normal family; Normal mappings; Univalent function  
  Abstract The main purpose of this paper is to study the concept of normal function in the context of harmonic mappings from the unit disk D to the complex plane. In particular, we obtain necessary conditions for a function f to be normal.  
  Address [Arbelaez, Hugo] Univ Nacl Colombia, Medellin, Colombia, Email: hjarbela@unal.edu.co;  
  Corporate Author Thesis  
  Publisher Springer Wien Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0026-9255 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000490002700003 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1087  
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Author Asenjo, F.A.; Comisso, L. doi  openurl
  Title Gravitational electromotive force in magnetic reconnection around Schwarzschild black holes Type Journal Article
  Year 2019 Publication Physical Review D Abbreviated Journal Phys. Rev. D  
  Volume 99 Issue 6 Pages 7 pp  
  Keywords  
  Abstract We analytically explore the effects of the gravitational electromotive force on magnetic reconnection around Schwarzschild black holes through a generalized general-relativistic magnetohydrodynamic model that retains two-fluid effects. It is shown that the gravitational electromotive force can couple to collisionless two-fluid effects and drive magnetic reconnection. This is allowed by the departure from quasineutrality in curved spacetime, which is explicitly manifested as the emergence of an effective resistivity in Ohm's law. The departure from quasineutrality is owed to different gravitational pulls experienced by separate parts of the current layer. This produces an enhancement of the reconnecion rate due to purely gravitational effects.  
  Address [Asenjo, Felipe A.] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Santiago 7941169, Chile, Email: felipe.asenjo@uai.cl;  
  Corporate Author Thesis  
  Publisher Amer Physical Soc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2470-0010 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000462917900001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 993  
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Author Asenjo, F.A.; Mahajan, S.M. doi  openurl
  Title Diamagnetic field states in cosmological plasmas Type Journal Article
  Year 2019 Publication Physical Review E Abbreviated Journal Phys. Rev. E  
  Volume 99 Issue 5 Pages 7 pp  
  Keywords  
  Abstract Using a generally covariant electrovortic (magnetofluid) formalism for relativistic plasmas, the dynamical evolution of a generalized vorticity (a combination of the magnetic and kinematic parts) is studied in a cosmological context. We derive macroscopic vorticity and magnetic field structures that can emerge in spatial equilibrium configurations of the relativistic plasma. These fields, however, evolve in time. These magnetic and velocity fields, self-consistently sustained in a plasma with arbitrary thermodynamics, constitute a diamagnetic state in the expanding universe. In particular, we explore a special class of magnetic and velocity field structures supported by a plasma in which the generalized vorticity vanishes. We derive a highly interesting characteristic of such “superconductor-like” fields in a cosmological plasmas in the radiation era in the early universe. In that case, the fields grow proportional to the scale factor, establishing a deep connection between the expanding universe and the primordial magnetic fields.  
  Address [Asenjo, Felipe A.] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Santiago 7941169, Chile, Email: felipe.asenjo@uai.cl;  
  Corporate Author Thesis  
  Publisher Amer Physical Soc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2470-0045 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000467737500016 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 999  
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Author Asenjo, F.A.; Moya, P.S. doi  openurl
  Title The contribution of magnetic monopoles to the ponderomotive force Type Journal Article
  Year 2019 Publication Journal Of Physics A-Mathematical And Theoretical Abbreviated Journal J. Phys. A-Math. Theor.  
  Volume 52 Issue 25 Pages 13 pp  
  Keywords plasma waves; magnetic monopoles; ponderomotive force  
  Abstract When magnetic monopoles are assumed to exist in plasma dynamics, the propagation of electromagnetic waves is modified as Maxwell equations acquire a symmetrical structure due to the existence of electric and magnetic charge and current densities. This work presents a theoretical exploration on how far we can push the limits of a plasma theory under the presence of magnetic monopoles. In particular, we study the modification of ponderomotive forces in a plasma composed by electric and magnetic charges. We show that the general ponderomotive force on this plasma depends non-trivially on the magnetic monopoles, through the slow temporal and spatial variations of the electromagnetic field amplitudes. The magnetic charges introduce corrections even if the plasma is unmagnetized. Also, it is shown that the magnetic monopoles also experience a ponderomotive force due to the electrons. This force is in the direction of propagation of the electromagnetic waves.  
  Address [Asenjo, Felipe A.] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Santiago 7941169, Chile, Email: felipe.asenjo@uai.cl;  
  Corporate Author Thesis  
  Publisher Iop Publishing Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1751-8113 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000469448000001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1029  
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Author Asenjoa, F.A.; Hojman, S.A. pdf  doi
openurl 
  Title Correspondence between dark energy quantum cosmology and Maxwell equations Type Journal Article
  Year 2019 Publication European Physical Journal C Abbreviated Journal Eur. Phys. J. C  
  Volume 79 Issue 9 Pages 5 pp  
  Keywords  
  Abstract A Friedmann-Robertson-Walker cosmology with dark energy can be modelled using a quintessence field. That system is equivalent to a relativistic particle moving on a two-dimensional conformal spacetime. When the quintessence behaves as a free massless scalar field in a Universe with cosmological constant, the quantized version of that theory can lead to a supersymmetric Majorana quantum cosmology. The purpose of this work is to show that such quantum cosmological model corresponds to the Maxwell equations for electromagnetic waves propagating in a medium with specific values for its relative permittivity and relative permeability. The form of those media parameters are calculated, implying that a Majorana quantum cosmology can be studied in an analogue electromagnetic system.  
  Address [Asenjoa, Felipe A.] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Santiago 7941169, Chile, Email: felipe.asenjo@uai.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 1434-6044 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000484523100004 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1053  
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Author Aybar, M.; Perez-Calleja, P.; Li, M.; Pavissich, J.P.; Nerenberg, R. pdf  doi
openurl 
  Title Predation creates unique void layer in membrane-aerated biofilms Type Journal Article
  Year 2019 Publication Water Research Abbreviated Journal Water Res.  
  Volume 149 Issue Pages 232-242  
  Keywords MABR; Biofilm; Protozoa; Predation; Voids; Porosity  
  Abstract The membrane-aerated biofilm reactor (MABR) is a novel wastewater treatment technology based on oxygen-supplying membranes. The counter diffusion of oxygen and electron donors in MABRs leads to unique behavior, and we hypothesized it also could impact predation. We used optical coherence tomography (OCT), microsensor analyses, and mathematical modeling to investigate predation in membrane-aerated biofilms (MABs). When protozoa were excluded from the inoculum, the MAB's OCT-observable void fraction was around 5%. When protozoa were included, the void fraction grew to nearly 50%, with large, continuous voids at the base of the biofilm. Real-time OCT imaging showed highly motile protozoa in the voids. MABs with protozoa and a high bulk COD (270 mg/L) only had 4% void fraction. DNA sequencing revealed a high relative abundance of amoeba in both high and low-COD MABs. Flagellates were only abundant in the low-COD MAB. Modeling also suggested a relationship between substrate concentrations, diffusion mode (co- or counter-diffusion), and bioflim void fraction. Results suggest that amoeba proliferate in the bioflim interior, especially in the aerobic zones. Voids form once COD limitation at the base of MABs allows predation rates to exceed microbial growth rates. Once formed, the voids provide a niche for motile protozoa, which expand the voids into a large, continuous gap. This increases the potential for biofilm sloughing, and may have detrimental effects on slow-growing, aerobic microorganisms such as nitrifying bacteria. (C)2018 Elsevier Ltd. All rights reserved.  
  Address [Aybar, M.; Perez-Calleja, P.; Li, M.; Pavissich, J. P.; Nerenberg, R.] Univ Notre Dame, Dept Civil & Environm Engn & Earth Sci, 156 Fitzpatrick Hall, Notre Dame, IN 46556 USA, Email: maybar@udec.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 0043-1354 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000458221200023 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1166  
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Author Baler, R.V.; Wijnhoven, I.B.; del Valle, V.I.; Giovanetti, C.M.; Vivanco, J.F. pdf  doi
openurl 
  Title Microporosity Clustering Assessment in Calcium Phosphate Bioceramic Particles Type Journal Article
  Year 2019 Publication Frontiers In Bioengineering And Biotechnology Abbreviated Journal Front. Bioeng. Biotechnol.  
  Volume 7 Issue 281 Pages 7 pp  
  Keywords calcium phosphate; bioceramic particle; microporosity; data mining; K-means clustering  
  Abstract There has been an increase in the application of different biomaterials to repair hard tissues. Within these biomaterials, calcium phosphate (CaP) bioceramics are suitable candidates, since they can be biocompatible, biodegradable, osteoinductive, and osteoconductive. Moreover, during sintering, bioceramic materials are prone to form micropores and undergo changes in their surface topographical features, which influence cellular physiology and bone ingrowth. In this study, five geometrical properties from the surface of CaP bioceramic particles and their micropores were analyzed by data mining techniques, driven by the research question: what are the geometrical properties of individual micropores in a CaP bioceramic, and how do they relate to each other? The analysis not only shows that it is feasible to determine the existence of micropore clusters, but also to quantify their geometrical properties. As a result, these CaP bioceramic particles present three groups of micropore clusters distinctive by their geometrical properties. Consequently, this new methodological clustering assessment can be applied to advance the knowledge about CaP bioceramics and their role in bone tissue engineering.  
  Address [Vallejos Baler, Raul; Irribarra del Valle, Victor; Vivanco, Juan F.] Adolfo Ibanez Univ, Fac Engn & Sci, Vina Del Mar, Chile, Email: juan.vivanco@uai.cl  
  Corporate Author Thesis  
  Publisher Frontiers Media Sa Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2296-4185 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000495370600001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1062  
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Author Bravo, M.; Cominetti, R.; Pavez-Signe, M. pdf  doi
openurl 
  Title Rates of convergence for inexact Krasnosel'skii-Mann iterations in Banach spaces Type Journal Article
  Year 2019 Publication Mathematical Programming Abbreviated Journal Math. Program.  
  Volume 175 Issue 1-2 Pages 241-262  
  Keywords Nonexpansive maps; Fixed point iterations; Rates of convergence; Evolution equations  
  Abstract We study the convergence of an inexact version of the classical Krasnosel'skii-Mann iteration for computing fixed points of nonexpansive maps. Our main result establishes a new metric bound for the fixed-point residuals, from which we derive their rate of convergence as well as the convergence of the iterates towards a fixed point. The results are applied to three variants of the basic iteration: infeasible iterations with approximate projections, the Ishikawa iteration, and diagonal Krasnosels'kii-Mann schemes. The results are also extended to continuous time in order to study the asymptotics of nonautonomous evolution equations governed by nonexpansive operators.  
  Address [Bravo, Mario] Univ Santiago Chile, Dept Matemat & Ciencia Comp, Alameda Libertador Bernardo Ohiggins 3363, Santiago, Chile, Email: mario.bravo.g@usach.cl;  
  Corporate Author Thesis  
  Publisher Springer Heidelberg Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0025-5610 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000465626900008 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 997  
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Author Cabrera, F.; Torres, A.; Campos, J.L.; Jeison, D. pdf  doi
openurl 
  Title Effect of Operational Conditions on the Behaviour and Associated Costs of Mixed Microbial Cultures for PHA Production Type Journal Article
  Year 2019 Publication Polymers Abbreviated Journal Polymers  
  Volume 11 Issue 2 Pages 14 pp  
  Keywords PHA; mixed microbial cultures; bioplastics; feast-famine; cost  
  Abstract Massive production and disposal of petrochemical derived plastics represent relevant environmental problems. Polyhydroxyalkanoates (PHA) are a renewable alternative that can even be produced from wastes. The production of PHA from acetate using mixed microbial cultures was studied. The effect of two key operational conditions was evaluated, i.e., substrate concentration and cycle length. The effects of these factors on several responses were studied using a surface response methodology. Several reactors were operated under selected conditions for at least 10 solids retention times to ensure stable operation. Results show that conditions providing higher PHA content involve lower biomass productivities. This has a great impact on biomass production costs. Results suggest then that PHA content alone may not be a reasonable criterion for determining optimal conditions for PHB production. If production costs need to be reduced, conditions that provide a lower PHA content in the selection reactor, but a higher biomass productivity may be of interest.  
  Address [Cabrera, Francisco; Torres, Alvaro] Univ La Frontera, Dept Chem Engn, Ave Francisco Salazar 01145, Temuco 4780000, Chile, Email: f.cabrera01@ufromail.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 2073-4360 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000460296000005 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 986  
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Author Campos, J.L.; Crutchik, D.; Franchi, O.; Pavissich, J.P.; Belmonte, M.; Pedrouso, A.; Mosquera-Corral, A.; del Rio, A.V. doi  openurl
  Title Nitrogen and Phosphorus Recovery From Anaerobically Pretreated Agro-Food Wastes: A Review Type Journal Article
  Year 2019 Publication Frontiers In Sustainable Food Systems Abbreviated Journal Front. Sustain. Food Syst.  
  Volume 2 Issue Pages 11 pp  
  Keywords ammonia combustion; ammonia hydrolysis; bioaccumulation; CANDO process; environmental benefit; nutrient recovery; phosphorus precipitation  
  Abstract Anaerobic digestion (AD) is commonly used for the stabilization of agro-food wastes and recovery of energy as methane. Since AD removes organic C but not nutrients (N and P), additional processes to remove them are usually applied to meet the stringent effluent criteria. However, in the past years, there was a shift from the removal to the recovery of nutrients as a result of increasing concerns regarding limited natural resources and the importance given to the sustainable treatment technologies. Recovering N and P from anaerobically pretreated agro-food wastes as easily transportable and marketable products has gained increasing importance to meet both regulatory requirements and increase revenue. For this reason, this review paper gives a critical comparison of the available and emerging technologies for N and P recovery from AD residues.  
  Address [Luis Campos, Jose; Crutchik, Dafne; Franchi, Oscar; Pablo Pavissich, Juan] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Vina Del Mar, Chile, Email: jluis.campos@uai.cl  
  Corporate Author Thesis  
  Publisher Frontiers Media Sa Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2571-581X ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000501892400001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1070  
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Author Campos, J.L.; Dumais, J.; Pavissich, J.P.; Franchi, O.; Crutchik, D.; Belmonte, M.; Faundez, M.; Jorquera, L.; Pedrouso, A.; Mosquera-Corral, A.; del Rio, A.V. pdf  doi
openurl 
  Title Predicting Accumulation of Intermediate Compounds in Nitrification and Autotrophic Denitrification Processes: A Chemical Approach Type Journal Article
  Year 2019 Publication Biomed Research International Abbreviated Journal Biomed Res. Int.  
  Volume 2019 Issue Pages 9 pp  
  Keywords  
  Abstract Nitrification and sulfur-based autotrophic denitrification processes can be used to remove ammonia from wastewater in an economical way. However, under certain operational conditions, these processes accumulate intermediate compounds, such as elemental sulphur, nitrite, and nitrous oxide, that are noxious for the environment. In order to predict the generation of these compounds, an analysis based on the Gibbs free energy of the possible reactions and on the oxidative capacity of the bulk liquid was done on case study systems. Results indicate that the Gibbs free energy is not a useful parameter to predict the generation of intermediate products in nitrification and autotrophic denitrification processes. Nevertheless, we show that the specific productions of nitrous oxide during nitrification, and of elemental sulphur and nitrite during autotrophic denitrification, are well related to the oxidative capacity of the bulk liquid.  
  Address [Luis Campos, Jose; Dumais, Jacques; Pablo Pavissich, Juan; Franchi, Oscar; Crutchik, Dafne] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Avda Padre Hurtado 750, Vina Del Mar, Chile, Email: jluis.campos@uai.cl  
  Corporate Author Thesis  
  Publisher Hindawi Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 2314-6133 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000476735700001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1017  
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Author Candia, G.; Macedo, J.; Jaimes, M.A.; Magna-Verdugo, C. doi  openurl
  Title A New State-of-the-Art Platform for Probabilistic and Deterministic Seismic Hazard Assessment Type Journal Article
  Year 2019 Publication Seismological Research Letters Abbreviated Journal Seismol. Res. Lett.  
  Volume 90 Issue 6 Pages 2262-2275  
  Keywords  
  Abstract A new computational platform for seismic hazard assessment is presented. The platform, named SeismicHazard, allows characterizing the intensity, uncertainty, and likelihood of ground motions from subduction-zone (shallow interface and intraslab) and crustal-zone earthquakes, considering site-specific as well as regional-based assessments. The platform is developed as an object-oriented MATLAB graphical user interface, and it features several state-of-the-art capabilities for probabilistic and deterministic (scenario-based) seismic hazard assessment. The platform integrates the latest developments in performance-based earthquake engineering for seismic hazard assessment, including seismic zonation models, ground-motion models (GMMs), ground-motion correlation structures, and the estimation of design spectra (uniform hazard spectra, classical conditional mean spectrum (CMS) for a unique tectonic setting). In addition to these standard capabilities, the platform supports advanced features, not commonly found in existing seismic hazard codes, such as (a) computation of source parameters from earthquake catalogs, (b) vector-probabilistic seismic hazard assessment, (c) hazard evaluation based on conditional GMMs and user-defined GMMs, (d) uncertainty treatment in the median ground motions through continuous GMM distributions, (e) regional shaking fields, and (f) estimation of CMS considering multiple GMMs and multiple tectonic settings. The results from the platform have been validated against accepted and well-documented benchmark solutions.  
  Address [Candia, Gabriel] Univ Desarrollo, Fac Ingn, Av Plaza 680, Santiago 7610658, Chile, Email: gcandia@udd.cl;  
  Corporate Author Thesis  
  Publisher Seismological Soc Amer Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0895-0695 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000493295100015 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1060  
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Author Canessa, G.; Gallego, J.A.; Ntaimo, L.; Pagnoncelli, B.K. pdf  doi
openurl 
  Title An algorithm for binary linear chance-constrained problems using IIS Type Journal Article
  Year 2019 Publication Computational Optimization And Applications Abbreviated Journal Comput. Optim. Appl.  
  Volume 72 Issue 3 Pages 589-608  
  Keywords Chance-constrained programming; Infeasible irreducible subsystems; Integer programming  
  Abstract We propose an algorithm based on infeasible irreducible subsystems to solve binary linear chance-constrained problems with random technology matrix. By leveraging on the problem structure we are able to generate good quality upper bounds to the optimal value early in the algorithm, and the discrete domain is used to guide us efficiently in the search of solutions. We apply our methodology to individual and joint binary linear chance-constrained problems, demonstrating the ability of our approach to solve those problems. Extensive numerical experiments show that, in some cases, the number of nodes explored by our algorithm is drastically reduced when compared to a commercial solver.  
  Address [Canessa, Gianpiero] Univ Adolfo Ibanez, Diagonal Torres 2640, Santiago 7941169, Chile, Email: gianpiero.canessa@edu.uai.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 0926-6003 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000463792400003 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 996  
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Author Canfora, F.; Gomberoff, A.; Oh, S.H.; Rojas, F.; Salgado-Rebolledo, P. pdf  doi
openurl 
  Title Meronic Einstein-Yang-Mills black hole in 5D and gravitational spin from isospin effect Type Journal Article
  Year 2019 Publication Journal Of High Energy Physics Abbreviated Journal J. High Energy Phys.  
  Volume Issue 6 Pages 32 pp  
  Keywords Black Holes; Field Theories in Higher Dimensions; Gauge Symmetry; Solitons Monopoles and Instantons  
  Abstract We construct an analytic black hole solution in SU(2) Einstein-Yang-Mills theory in five dimensions supporting a Meron field. The gauge field is proportional to a pure gauge and has a non-trivial topological charge. The would-be singularity at the Meron core gets shielded from the exterior by the black hole horizon. The metric has only one integration constant, namely, its ADM mass, which is shown to be finite once an appropriate boundary term is added to the action. The thermodynamics is also worked out, and a first-order phase transition, similar to the one occurring in the Reissner-Nordstrom case is identified. We also show that the solution produces a spin from isospin effect, i.e., even though the theory is constructed out of bosons only, the combined system of a scalar field and this background may become fermionic. More specifically, we study scalar excitations in this purely bosonic background and find that the system describes fermionic degrees of freedom at spatial infinity. Finally, for the asymptotically AdS(5) case, we study its consequences in the context of the AdS/CFT correspondence.  
  Address [Canfora, Fabrizio; Gomberoff, Andres] Ctr Estudios Cient, Casilla 1469, Valdivia, Chile, Email: canfora@cecs.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 1029-8479 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000472210200001 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 1024  
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