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Author Barrera, J.; Ycart, B.
Title Bounds for left and right window cutoffs Type
Year 2014 Publication Alea-Latin American Journal Of Probability And Mathematical Statistics Abbreviated Journal ALEA-Latin Am. J. Probab. Math. Stat.
Volume 11 Issue 2 Pages 445-458
Keywords cutoff; exponential ergodicity
Abstract The location and width of the time window in which a sequence of processes converges to equilibrum are given under conditions of exponential convergence. The location depends on the side: the left-window and right-window cutoffs may have different locations. Bounds on the distance to equilibrium are given for both sides. Examples prove that the bounds are tight.
Address [Barrera, Javiera] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Santiago, Chile, Email: javiera.barrera@uai.cl;
Corporate Author Thesis
Publisher Impa Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1980-0436 ISBN Medium
Area Expedition Conference
Notes WOS:000209555300005 Approved
Call Number UAI @ eduardo.moreno @ Serial 568
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Author Braun, S.; Asenjo, F.A.; Mahajan, S.M.
Title Comment on “Spin-Gradient-Driven Light Amplification in a Quantum Plasma” Reply Type
Year 2014 Publication Physical Review Letters Abbreviated Journal Phys. Rev. Lett.
Volume 112 Issue 12 Pages 1 pp
Keywords
Abstract
Address [Braun, S.; Asenjo, F. A.; Mahajan, S. M.] Univ Texas AustinStudies, Inst Fus Studies, Austin, TX 78712 USA, Email: faz@physics.utexas.edu;
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 0031-9007 ISBN Medium
Area Expedition Conference
Notes WOS:000333921000007 Approved
Call Number UAI @ eduardo.moreno @ Serial 471
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Author Qadir, A.; Asenjo, F.A.; Mahajan, S.M.
Title Magnetic field seed generation in plasmas around charged and rotating black holes Type
Year 2014 Publication Physica Scripta Abbreviated Journal Phys. Scr.
Volume 89 Issue 8 Pages 7 pp
Keywords seed magnetic field; general relativistic drive; Kerr metric
Abstract Previous work by the authors introduced the possibility of generating seed magnetic fields by spacetime curvature and applied it in the vicinity of a Schwarzschild black hole. It was pointed out that it would be worthwhile to consider the effect in other background geometries and particularly in the vicinity of a rotating black hole, which is generically to be expected, astrophysically. In this paper that suggestion is followed up and we calculate generated magnetic field seed due to Reissner-Nordstrom and Kerr spacetimes. The conditions for the drive for the seed of a magnetic field is obtained for charged black holes, finding that in the horizon the drive vanishes. Also, the psi N-force produced by the Kerr black hole is obtained and its relation with the magnetic field seed is discussed, producing a more effective drive.
Address [Qadir, Asghar] Natl Univ Sci & Technol, Ctr Adv Math & Phys, Islamabad 4400, Pakistan, Email: aqadirmath@yahoo.com
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 0031-8949 ISBN Medium
Area Expedition Conference
Notes WOS:000343295000004 Approved
Call Number UAI @ eduardo.moreno @ Serial 469
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Author Besson, S.; Dumais, J.
Title Stochasticity in the symmetric division of plant cells: when the exceptions are the rule Type
Year 2014 Publication Frontiers In Plant Science Abbreviated Journal Front. Plant Sci.
Volume 5 Issue Pages 4 pp
Keywords
Abstract
Address [Besson, Sebastien] Univ Dundee, Ctr Gene Regulat & Express, Coll Life Sci, Dundee, Scotland, Email: jacques.dumais@uai.cl
Corporate Author Thesis
Publisher Frontiers Research Foundation Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1664-462x ISBN Medium
Area Expedition Conference
Notes WOS:000344740100002 Approved
Call Number UAI @ eduardo.moreno @ Serial 456
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Author Anabalon, A.; Bicak, J.; Saavedra, J.
Title Hairy black holes: Stability under odd-parity perturbations and existence of slowly rotating solutions Type
Year 2014 Publication Physical Review D Abbreviated Journal Phys. Rev. D
Volume 90 Issue 12 Pages 6 pp
Keywords
Abstract We show that, independently of the scalar field potential and of specific asymptotic properties of the spacetime (asymptotically flat, de Sitter or anti-de Sitter), any static, spherically symmetric or planar, black hole solution of the Einstein theory minimally coupled to a real scalar field with a general potential is mode stable under linear odd-parity perturbations. To this end, we generalize the Regge-Wheeler equation for a generic self-interacting scalar field, and show that the potential of the relevant Schrodinger operator can be mapped, by the so-called S-deformation, to a semipositively defined potential. With these results at hand we study the existence of slowly rotating configurations. The frame dragging effect is compared with the corresponding effect in the case of a Kerr black hole.
Address [Anabalon, Andres] Univ Adolfo Ibanez, Fac Artes Liber, Dept Ciencias, Vina Del Mar, Chile, Email: andres.anabalon@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 1550-7998 ISBN Medium
Area Expedition Conference
Notes WOS:000349414800003 Approved
Call Number UAI @ eduardo.moreno @ Serial 450
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Author Bitran, E.; Rivera, P.; Villena, M.J.
Title Water management problems in the Copiapo Basin, Chile: markets, severe scarcity and the regulator Type
Year 2014 Publication Water Policy Abbreviated Journal Water Policy
Volume 16 Issue 5 Pages 844-863
Keywords Aquifers; Economic incentives; Regulations; Sustainable water management; Water markets
Abstract This research focuses on the determination of the factors that led to the failure of water management in the Copiapo Basin in Chile. Interestingly, the existence of full private ownership and free tradability of water rights has not prevented the overexploitation of groundwater resources. In the paper, firstly, water regulation and the role of the regulator in Chile are briefly discussed. Secondly, the evolution of water resources in the Copiapo region is characterized and analyzed, and the granting of water use rights in the basin in the last 30 years is concisely described. Thirdly, we examine and analyze prices and quantities traded in the water market of the Copiapo region. We will argue that this crisis is a consequence first of failure in regulatory implementation and second of an extremely rigid regulatory framework that leaves limited room for adjustment to changing conditions, especially regarding the emergence of new information concerning water availability. We believe this investigation is not only relevant for this case in particular, but also for other regions and countries where water markets are in place.
Address [Bitran, Eduardo; Villena, Marcelo J.] Univ Adolfo Ibanez, Fac Engn & Sci, Santiago, Chile, Email: marcelo.villena@uai.cl
Corporate Author Thesis
Publisher Iwa Publishing Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1366-7017 ISBN Medium
Area Expedition Conference
Notes WOS:000349029200005 Approved
Call Number UAI @ eduardo.moreno @ Serial 449
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Author Santos-Neto, M.; Cysneiros, F.J.A.; Leiva, V.; Barros, M.
Title A Reparameterized Birnbaum-Saunders Distribution And Its Moments, Estimation And Applications Type
Year 2014 Publication REVSTAT-Statistical Journal Abbreviated Journal REVSTAT-Stat. J.
Volume 12 Issue 3 Pages 247-272
Keywords data analysis; maximum likelihood and moment estimation; Monte Carlo method; random number generation; statistical software
Abstract The Birnbaum-Saunders (BS) distribution is a model that is receiving considerable attention due to its good properties. We provide some results on moments of a reparameterized version of the BS distribution and a generation method of random numbers from this distribution. In addition, we propose estimation and inference for the mentioned parameterization based on maximum likelihood, moment, modified moment and generalized moment methods. By means of a Monte Carlo simulation study, we evaluate the performance of the proposed estimators. We discuss applications of the reparameterized BS distribution from different scientific fields and analyze two real-world data sets to illustrate our results. The simulated and real data are analyzed by using the R software.
Address [Santos-Neto, Manoel; Barros, Michelli] Univ Fed Campina Grande, Dept Estat, Campina Grande, Brazil, Email: manoel.ferreira@ufcg.edu.br;
Corporate Author Thesis
Publisher Inst Nacional Estatistica-Ine Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1645-6726 ISBN Medium
Area Expedition Conference
Notes WOS:000349017700003 Approved
Call Number UAI @ eduardo.moreno @ Serial 448
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Author Ruz, G.A.; Timmermann, T.; Barrera, J.; Goles, E.
Title Neutral space analysis for a Boolean network model of the fission yeast cell cycle network Type
Year 2014 Publication Biological Research Abbreviated Journal Biol. Res.
Volume 47 Issue Pages 12 pp
Keywords Neutral graph; Boolean networks; Evolution strategy; Fission yeast cell cycle; Attractors
Abstract Background: Interactions between genes and their products give rise to complex circuits known as gene regulatory networks (GRN) that enable cells to process information and respond to external stimuli. Several important processes for life, depend of an accurate and context-specific regulation of gene expression, such as the cell cycle, which can be analyzed through its GRN, where deregulation can lead to cancer in animals or a directed regulation could be applied for biotechnological processes using yeast. An approach to study the robustness of GRN is through the neutral space. In this paper, we explore the neutral space of a Schizosaccharomyces pombe (fission yeast) cell cycle network through an evolution strategy to generate a neutral graph, composed of Boolean regulatory networks that share the same state sequences of the fission yeast cell cycle. Results: Through simulations it was found that in the generated neutral graph, the functional networks that are not in the wildtype connected component have in general a Hamming distance more than 3 with the wildtype, and more than 10 between the other disconnected functional networks. Significant differences were found between the functional networks in the connected component of the wildtype network and the rest of the network, not only at a topological level, but also at the state space level, where significant differences in the distribution of the basin of attraction for the G(1) fixed point was found for deterministic updating schemes. Conclusions: In general, functional networks in the wildtype network connected component, can mutate up to no more than 3 times, then they reach a point of no return where the networks leave the connected component of the wildtype. The proposed method to construct a neutral graph is general and can be used to explore the neutral space of other biologically interesting networks, and also formulate new biological hypotheses studying the functional networks in the wildtype network connected component.
Address [Ruz, Gonzalo A.; Timmermann, Tania; Barrera, Javiera; Goles, Eric] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Santiago, Chile, Email: gonzalo.ruz@uai.cl
Corporate Author Thesis
Publisher Soc Biolgia Chile Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0716-9760 ISBN Medium
Area Expedition Conference
Notes WOS:000348529400004 Approved
Call Number UAI @ eduardo.moreno @ Serial 440
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Author Chandia, O.; Bevilaqua, L.I.; Vallilo, B.C.
Title AdS pure spinor superstring in constant backgrounds Type
Year 2014 Publication Journal Of High Energy Physics Abbreviated Journal J. High Energy Phys.
Volume Issue 6 Pages 16 pp
Keywords Superstrings and Heterotic Strings; Conformal Field Models in String Theory; BRST Symmetry
Abstract In this paper we study the pure spinor formulation of the superstring in AdS(5) x S-5 around point particle solutions of the classical equations of motion. As a particular example we quantize the pure spinor string in the BMN background.
Address [Chandia, Osvaldo] Univ Adolfo Ibanez, Fac Artes Liberales, Fac Ingn & Ciencias, Dept Ciencias, Santiago, Chile, Email: ochandiaq@gmail.com;
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:000347856200001 Approved
Call Number UAI @ eduardo.moreno @ Serial 437
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Author Goles, E.; Montealegre, P.
Title Computational complexity of threshold automata networks under different updating schemes Type
Year 2014 Publication Theoretical Computer Science Abbreviated Journal Theor. Comput. Sci.
Volume 559 Issue Pages 3-19
Keywords Automata networks; Threshold functions; Computational complexity; Updating scheme; P-completeness; NC; NP-Hard
Abstract Given a threshold automata network, as well as an updating scheme over its vertices, we study the computational complexity associated with the prediction of the future state of a vertex. More precisely, we analyze two classes of local functions: the majority and the AND-OR rule (vertices take the AND or the OR logic functions over the state of its neighborhoods). Depending on the updating scheme, we determine the complexity class (NC, P, NP, PSPACE) where the prediction problem belongs. (C) 2014 Elsevier B.V. All rights reserved.
Address [Goles, Eric] Univ Adolfo Ibanez, Fac Ciencias & Tecnol, Santiago, Chile, Email: eric.chacc@uai.cl;
Corporate Author Thesis
Publisher Elsevier Science Bv Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0304-3975 ISBN Medium
Area Expedition Conference
Notes WOS:000347025300002 Approved
Call Number UAI @ eduardo.moreno @ Serial 434
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Author Gaitan-Espitia, J.D.; Bacigalupe, L.D.; Opitz, T.; Lagos, N.A.; Timmermann, T.; Lardies, M.A.
Title Geographic variation in thermal physiological performance of the intertidal crab Petrolisthes violaceus along a latitudinal gradient Type
Year 2014 Publication Journal Of Experimental Biology Abbreviated Journal J. Exp. Biol.
Volume 217 Issue 24 Pages 4379-4386
Keywords Reaction norm; Thermal sensitivity; Heart rate; Thermotolerance; Thermal safety margin; Latitudinal gradients
Abstract Environmental temperature has profound effects on the biological performance and biogeographical distribution of ectothermic species. Variation of this abiotic factor across geographic gradients is expected to produce physiological differentiation and local adaptation of natural populations depending on their thermal tolerances and physiological sensitivities. Here, we studied geographic variation in whole-organism thermal physiology of seven populations of the porcelain crab Petrolisthes violaceus across a latitudinal gradient of 3000 km, characterized by a cline of thermal conditions. Our study found that populations of P. violaceus show no differences in the limits of their thermal performance curves and demonstrate a negative correlation of their optimal temperatures with latitude. Additionally, our findings show that high-latitude populations of P. violaceus exhibit broader thermal tolerances, which is consistent with the climatic variability hypothesis. Interestingly, under a future scenario of warming oceans, the thermal safety margins of P. violaceus indicate that lower latitude populations can physiologically tolerate the ocean-warming scenarios projected by the IPCC for the end of the twenty-first century.
Address [Diego Gaitan-Espitia, Juan; Bacigalupe, Leonardo D.] Univ Austral Chile, Fac Ciencias, Inst Ciencias Ambientales & Evolut, Valdivia 5090000, Chile, Email: marco.lardies@uai.cl
Corporate Author Thesis
Publisher Company Of Biologists Ltd Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0022-0949 ISBN Medium
Area Expedition Conference
Notes WOS:000346420200019 Approved
Call Number UAI @ eduardo.moreno @ Serial 432
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Author Acena, A.; Anabalon, A.; Astefanesei, D.; Mann, R.
Title Hairy planar black holes in higher dimensions Type
Year 2014 Publication Journal Of High Energy Physics Abbreviated Journal J. High Energy Phys.
Volume Issue 1 Pages 21 pp
Keywords Classical Theories of Gravity; Black Holes
Abstract We construct exact hairy planar black holes in D-dimensional AdS gravity. These solutions are regular except at the singularity and have stress-energy that satisfies the null energy condition. We present a detailed analysis of their thermodynamical properties and show that the first law is satisfied. We also discuss these solutions in the context of AdS/CFT duality and construct the associated c-function.
Address [Acena, Andres] Univ Nacl Cuyo, Inst Ciencias Basicas, RA-5500 Mendoza, Argentina, Email: acena.andres@gmail.com;
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:000346240600002 Approved
Call Number UAI @ eduardo.moreno @ Serial 431
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Author Manriquez, P.H.; Jara, M.E.; Torres, R.; Mardones, M.L.; Lagos, N.A.; Lardies, M.A.; Vargas, C.A.; Duarte, C.; Navarro, J.M.
Title Effects of ocean acidification on larval development and early post-hatching traits in Concholepas concholepas (loco) Type
Year 2014 Publication Marine Ecology Progress Series Abbreviated Journal Mar. Ecol.-Prog. Ser.
Volume 514 Issue Pages 87-103
Keywords Hatching time; Hatching success; Early larval survival; Protoconch size; Protoconch thickness; Statolith size; Egg capsule wall thickness; Developmental plasticity
Abstract Larval stages represent a bottleneck influencing the persistence of marine populations with complex life cycles. Concholepas concholepas is a gastropod species that sustains the most important small-scale artisanal fisheries of the Chile-Peru Humboldt Coastal current system. In this study, newly-laid egg capsules of C. concholepas collected from 3 localities along the Chilean coast were used to evaluate the potential consequences of projected near-future ocean acidification (OA) on larval development and early post-hatching larval traits. We compared hatching time, hatching success and early survivorship of encapsulated larvae reared under contrasting average levels of pCO(2): 382 (present-day), ca. 715 and ca. 1028 μatm CO2 (levels expected in near-future scenarios of OA). Moreover, we compared morphological larval traits such as protoconch size, thickness and statolith size at hatching. Some of the developmental traits were negatively affected by pCO(2) levels, source locality, female identity, or the interaction between those factors. Meanwhile, the effect of pCO(2) levels on morphological larval traits showed significant interactions depending on differences among egg capsules and females. Our results suggest that OA may decouple hatching time from oceanographic processes associated with larval transport and reduce larval survivorship during the dispersive phase, with a potential impact on the species' population dynamics. However, the results also show geographic variability and developmental plasticity in the investigated traits. This variation may lead to an increased acclimatization ability, facilitate the persistence of natural populations and mitigate the negative effects that OA might have on landings and revenues derived from the fishery of this species.
Address [Manriquez, Patricio H.; Elisa Jara, Maria] CEAZA, LECOT, Coquimbo, Chile, Email: patriciohmanriquez@gmail.com
Corporate Author Thesis
Publisher Inter-Research Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0171-8630 ISBN Medium
Area Expedition Conference
Notes WOS:000345700700007 Approved
Call Number UAI @ eduardo.moreno @ Serial 430
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Author Espinoza, D.; Moreno, E.
Title A primal-dual aggregation algorithm for minimizing conditional value-at-risk in linear programs Type
Year 2014 Publication Computational Optimization And Applications Abbreviated Journal Comput. Optim. Appl.
Volume 59 Issue 3 Pages 617-638
Keywords Conditional value at risk; Aggregation techniques; Approximation methods; Sample average approximation
Abstract Recent years have seen growing interest in coherent risk measures, especially in Conditional Value-at-Risk (). Since is a convex function, it is suitable as an objective for optimization problems when we desire to minimize risk. In the case that the underlying distribution has discrete support, this problem can be formulated as a linear programming (LP) problem. Over more general distributions, recent techniques, such as the sample average approximation method, allow to approximate the solution by solving a series of sampled problems, although the latter approach may require a large number of samples when the risk measures concentrate on the tail of the underlying distributions. In this paper we propose an automatic primal-dual aggregation scheme to exactly solve these special structured LPs with a very large number of scenarios. The algorithm aggregates scenarios and constraints in order to solve a smaller problem, which is automatically disaggregated using the information of its dual variables. We compare this algorithm with other common approaches found in related literature, such as an improved formulation of the full problem, cut-generation schemes and other problem-specific approaches available in commercial software. Extensive computational experiments are performed on portfolio and general LP instances.
Address [Espinoza, Daniel] Univ Chile, Dept Ind Engn, Santiago, Chile, Email: daespino@dii.uchile.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:000344803000009 Approved
Call Number UAI @ eduardo.moreno @ Serial 424
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Author Zhang, H.L.; Baeyens, J.; Degreve, J.; Caceres, G.; Segal, R.; Pitie, F.
Title Latent heat storage with tubular-encapsulated phase change materials (PCMs) Type
Year 2014 Publication Energy Abbreviated Journal Energy
Volume 76 Issue Pages 66-72
Keywords Heat storage; Latent heat; Phase change materials; Nitrate-PCM; Tube-encapsulation; Experiments
Abstract Heat capture and storage is important in both solar energy projects and in the recovery of waste heat from industrial processes. Whereas heat capture will mostly rely on the use of a heat carrier, the high efficiency heat storage needs to combine sensible and latent heat storage with phase change materials (PCMs) to provide a high energy density storage. The present paper briefly reviews energy developments and storage techniques, with special emphasis on thermal energy storage and the use of PCM. It thereafter illustrates first results obtained when encapsulating NaNO3/KNO3-PCM in an AISI 321 tube, as example of a storage application using a multi-tubular exchanger filled with PCM. To increase the effective thermal conductivity of the PCM, 2 inserts i.e. metallic foam and metallic sponge are also tested. Experimental discharging (cooling) rates are interpreted by both solving the unsteady-state conduction equation, and by using Comsol Multiphysics. Predictions and experimental temperature evolutions are in fair agreement, and the effect of the inserts is clearly reflected by the increased effective thermal conductivity of the insert-PCM composite. Application of Comsol to predict the mechanical behavior of the system, when melting and associated expansion increase the internal pressure, demonstrates that the pressure build-up is far below the Young's modulus of the AISI 321 encapsulation and that this shell will not crack (C) 2014 Elsevier Ltd. All rights reserved.
Address [Zhang, H. L.; Degreve, J.] Katholieke Univ Leuven, Dept Chem Engn, Chem & Biochem Proc Technol & Control Sect, B-3001 Heverlee, Belgium, Email: Huili.Zhang@cit.kuleuven.be
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 0360-5442 ISBN Medium
Area Expedition Conference
Notes WOS:000344444600009 Approved
Call Number UAI @ eduardo.moreno @ Serial 422
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Author Canessa, E.; Chaigneau, S.
Title The dynamics of social agreement according to Conceptual Agreement Theory Type
Year 2014 Publication Quality & Quantity Abbreviated Journal Qual. Quant.
Volume 48 Issue 6 Pages 3289-3309
Keywords Conceptual Agreement Theory; Agent-based modeling; Conceptual diversity; Dynamics of conceptual development
Abstract Many social phenomena can be viewed as processes in which individuals in social groups develop agreement (e.g., public opinion, the spreading of rumor, the formation of social and linguistic conventions). Conceptual Agreement Theory (CAT) models social agreement as a simplified communicational event in which an Observer and Actor exchange ideas about a concept , and where uses that information to infer whether 's conceptual state is the same as its own (i.e., to infer agreement). Agreement may be true (when infers that is thinking and this is in fact the case, event ) or illusory (when infers that is thinking and this is not the case, event ). In CAT, concepts that afford or become more salient in the minds of members of social groups. Results from an agent-based model (ABM) and probabilistic model that implement CAT show that, as our conceptual analyses suggested would be the case, the simulated social system selects concepts according to their usefulness to agents in promoting agreement among them (Experiment 1). Furthermore, the ABM exhibits more complex dynamics where similar minded agents cluster and are able to retain useful concepts even when a different group of agents discards them (Experiment 2). We discuss the relevance of CAT and the current findings for analyzing different social communication events, and suggest ways in which CAT could be put to empirical test.
Address [Canessa, Enrique] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Vina Del Mar, Chile, Email: ecanessa@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 0033-5177 ISBN Medium
Area Expedition Conference
Notes WOS:000343294900024 Approved
Call Number UAI @ eduardo.moreno @ Serial 418
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Author Petrova, O.; Mellado, P.; Tchernyshyov, O.
Title Unpaired Majorana modes on dislocations and string defects in Kitaev's honeycomb model Type
Year 2014 Publication Physical Review B Abbreviated Journal Phys. Rev. B
Volume 90 Issue 13 Pages 14 pp
Keywords
Abstract We study the gapped phase of Kitaev's honeycomb model (a Z(2) spin liquid) on a lattice with topological defects. We find that some dislocations and string defects carry unpaired Majorana fermions. Physical excitations associated with these defects are (complex) fermion modes made out of two (real) Majorana fermions connected by a Z(2) gauge string. The quantum state of these modes is robust against local noise and can be changed by winding a Z(2) vortex around one of the dislocations. The exact solution respects gauge invariance and reveals a crucial role of the gauge field in the physics of Majorana modes. To facilitate these theoretical developments, we recast the degenerate perturbation theory for spins in the language of Majorana fermions.
Address [Petrova, Olga] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
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 2469-9950 ISBN Medium
Area Expedition Conference
Notes WOS:000342794300003 Approved
Call Number UAI @ eduardo.moreno @ Serial 417
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Author Gacitua, M.A.; Gonzalez, B.; Majone, M.; Aulenta, F.
Title Boosting the electrocatalytic activity of Desulfovibrio paquesii biocathodes with magnetite nanoparticles Type
Year 2014 Publication International Journal Of Hydrogen Energy Abbreviated Journal Int. J. Hydrog. Energy
Volume 39 Issue 27 Pages 14540-14545
Keywords Microbial biocathode; Magnetite nanoparticles; Hydrogen generation; Microbial electrolysis; Desulfovibrio sp.
Abstract The production of reduced value-added chemicals and fuels using microorganisms as cheap cathodic electrocatalysts is recently attracting considerable attention. A robust and sustainable production is, however, still greatly hampered by a poor understanding of electron transfer mechanisms to microorganisms and the lack of strategies to improve and manipulate thereof. Here, we investigated the use of electrically-conductive magnetite (Fe3O4) nanoparticles to improve the electrocatalytic activity of a H-2-producing Desulfovibrio paquesii biocathode. Microbial biocathodes supplemented with a suspension of nanoparticles displayed increased H-2 production rates and enhanced stability compared to unamended ones. Cyclic voltammetry confirmed that Faradaic currents involved in microbially-catalyzed H-2 evolution were enhanced by the addition of the nanoparticles. Possibly, nanoparticles improve the extracellular electron path to the microorganisms by creating composite networks comprising of mineral particles and microbial cells. Copyright (C) 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Address [Gacitua, Manuel A.; Gonzalez, Bernardo] Univ Adolfo Ibanez, Ctr Appl Ecol & Sustainabil CAPES, Lab Bioingn, Fac Ingn & Ciencias, Santiago 7941169, Chile, Email: mgacitua.pdc@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 0360-3199 ISBN Medium
Area Expedition Conference
Notes WOS:000341897500004 Approved
Call Number UAI @ eduardo.moreno @ Serial 414
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Author Yushimito, W.F.; Ban, X.G.; Holguin-Veras, J.
Title A Two-Stage Optimization Model for Staggered Work Hours Type
Year 2014 Publication Journal Of Intelligent Transportation Systems Abbreviated Journal J. Intell. Transport. Syst.
Volume 18 Issue 4 Pages 410-425
Keywords Optimization; Dynamic User Equilibrium; Quadratic Assignment; Alternative Work Schedules; Staggered Work Hours
Abstract Traditional or standard work schedules refer to the requirement that workers must be at work the same days and during the same hours each day. This requirement constrains work-related trip arrivals, and generates morning and afternoon peak hours due to the concentration of work days and/or work hours. Alternative work schedules seek to reschedule work activities away from this traditional requirement. The aim is to flatten the peak hours by spreading the demand (i.e., assigning it to the shoulders of the peak hour), lowering the peak demand. This not only would reduce societal costs but also can help to minimize the physical requirements. In this article, a two-stage optimization model is presented to quantify the effects of staggered work hours under incentive policies. In the first stage, a variation of the generalized quadratic assignment problem is used to represent the firm's assignment of workers to different work starting times. This is the input of a nonlinear complementarity problem that captures the behavior of the users of the transportation network who are seeking to overcome the constraints imposed by working schedules (arrival times). Two examples are provided to show how the model can be used to (a) quantify the effects and response of the firm to external incentives and (b) evaluate what type of arrangements in starting times are to be made in order to achieve a social optimum.
Address [Yushimito, Wilfredo F.] Univ Adolfo Ibanez, Dept Engn & Sci, Vina Del Mar, Chile, Email: wilfredo.yushimito@uai.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 1547-2450 ISBN Medium
Area Expedition Conference
Notes WOS:000342502300008 Approved
Call Number UAI @ eduardo.moreno @ Serial 413
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Author Henderson, R.G.; Verougstraete, V.; Anderson, K.; Arbildua, J.J.; Brock, T.O.; Brouwers, T.; Cappellini, D.; Delbeke, K.; Herting, G.; Hixon, G.; Wallinder, I.O.; Rodriguez, P.H.; Van Assche, F.; Wilrich, P.; Oller, A.R.
Title Inter-laboratory validation of bioaccessibility testing for metals Type
Year 2014 Publication Regulatory Toxicology And Pharmacology Abbreviated Journal Regul. Toxicol. Pharmacol.
Volume 70 Issue 1 Pages 170-181
Keywords Metals; Alloys; UVCBs; Classification; Bioelution; Bioaccessibility; Read-across; Inter-laboratory validation
Abstract Bioelution assays are fast, simple alternatives to in vivo testing. In this study, the intra- and inter-laboratory variability in bioaccessibility data generated by bioelution tests were evaluated in synthetic fluids relevant to oral, inhalation, and dermal exposure. Using one defined protocol, five laboratories measured metal release from cobalt oxide, cobalt powder, copper concentrate, Inconel alloy, leaded brass alloy, and nickel sulfate hexahydrate. Standard deviations of repeatability (S-r) and reproducibility (S-R) were used to evaluate the intra- and inter-laboratory variability, respectively. Examination of the s(R):s(r) ratios demonstrated that, while gastric and lysosomal fluids had reasonably good reproducibility, other fluids did not show as good concordance between laboratories. Relative standard deviation (RSD) analysis showed more favorable reproducibility outcomes for some data sets; overall results varied more between- than within-laboratories. RSD analysis of s(r) showed good within-laboratory variability for all conditions except some metals in interstitial fluid. In general, these findings indicate that absolute bioaccessibility results in some biological fluids may vary between different laboratories. However, for most applications, measures of relative bioaccessibility are needed, diminishing the requirement for high inter-laboratory reproducibility in absolute metal releases. The inter-laboratory exercise suggests that the degrees of freedom within the protocol need to be addressed. (C) 2014 Elsevier Inc. All rights reserved.
Address [Henderson, Rayetta G.; Hixon, Greg] ToxStrategies Inc, Raleigh, NC 27615 USA, Email: rhenderson@toxstrategies.com;
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 0273-2300 ISBN Medium
Area Expedition Conference
Notes WOS:000342482200018 Approved
Call Number UAI @ eduardo.moreno @ Serial 412
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