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Author Azeem, M.; Guérin, A.; Dumais, T.; Caminos, L.; Goldstein, R.E.; Pesci, A.I.; de Dios Rivera, J.; Torres, M.J.; Wiener, J.; Campos, J.L.; Dumais, J. doi  openurl
  Title Optimal Design of Multilayer Fog Collectors Type
  Year 2020 Publication ACS Applied Materials & Interfaces Abbreviated Journal ACS Appl. Mater. Interfaces  
  Volume 12 Issue 6 Pages 7736-7743  
  Keywords  
  Abstract The growing concerns over desertification have spurred research into technologies aimed at acquiring water from nontraditional sources such as dew, fog, and water vapor. Some of the most promising developments have focused on improving designs to collect water from fog. However, the absence of a shared framework to predict, measure, and compare the water collection efficiencies of new prototypes is becoming a major obstacle to progress in the field. We address this problem by providing a general theory to design efficient fog collectors as well as a concrete experimental protocol to furnish our theory with all the necessary parameters to quantify the effective water collection efficiency. We show in particular that multilayer collectors are required for high fog collection efficiency and that all efficient designs are found within a narrow range of mesh porosity. We support our conclusions with measurements on simple multilayer harp collectors.  
  Address  
  Corporate Author Thesis  
  Publisher American Chemical Society Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1944-8244 ISBN Medium  
  Area Expedition Conference  
  Notes doi: 10.1021/acsami.9b19727 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 1108  
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Author Goles, E.; Montealegre, P.; Vera, J. url  openurl
  Title Naming Game Automata Networks Type
  Year 2016 Publication Journal Of Cellular Automata Abbreviated Journal J. Cell. Autom.  
  Volume 11 Issue 5-6 Pages 497-521  
  Keywords Automata networks; cellular automata; majority functions; energy operator; naming game; fixed points; limit cycles  
  Abstract In this paper we introduce automata networks to model some features of the emergence of a vocabulary related with the naming game model. We study the dynamical behaviour (attractors and convergence) of extremal and majority local functions.  
  Address [Goles, Eric; Vera, Javier] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Avda Diagonal Las Torres 2640, Santiago, Chile, Email: eric.chacc@uai.cl;  
  Corporate Author Thesis  
  Publisher Old City Publishing Inc Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1557-5969 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000382426500007 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 649  
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Author Parot, R.; Rivera, J.I.; Reszka, P.; Torero, J.L.; Fuentes, A. doi  openurl
  Title A simplified analytical model for radiation dominated ignition of solid fuels exposed to multiple non-steady heat fluxes Type
  Year 2022 Publication Combustion and Flame Abbreviated Journal Combust. Flame  
  Volume 237 Issue Pages 111866  
  Keywords Ignition delay time; Fire safety; Integral heat equation; Solid ignition; Translucent solids; In-depth absorption of radiation  
  Abstract Heat fluxes from fires are strongly time-dependent. Historically, the thermal ignition theory in its classical form has neglected this time dependency until recent years, where theories have been developed to include time-varying incident heat fluxes. This article proposes a simplified general model formulation for the heating of solid fuels exposed to four different heat flux behaviors, considering the penetration of radiation into the medium. The incident heat flux cases developed where: Constant, Linear, Exponential and Polynomial, which represent different situations related to structural and wildland fires. The analytical models consider a spatially averaged medium temperature and exact and approximate solutions are presented, based on the critical ignition temperature criterion, which are valid for solids of any optical thickness. The results were validated by comparison with various models presented in the literature, where the model granted in this work was capable to adjust to all of them, especially when high heat fluxes are involved. Therefore, the proposed model acquires a significant engineering utility since it provides a single model to be used as a general and versatile tool to predict the ignition delay time in a manageable way for solid fuels exposed to different fire conditions.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0010-2180 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000735880500007 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1521  
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Author Reszka, P.; Cruz, J.J.; Valdivia, J.; Gonzalez, F.; Rivera, J.; Carvajal, C.; Fuentes, A. doi  openurl
  Title Ignition delay times of live and dead pinus radiata needles Type
  Year 2020 Publication Fire Safety Journal Abbreviated Journal Fire Saf. J.  
  Volume 112 Issue Pages 7 pp  
  Keywords Leaf senescence; Photosynthetic pigments; Critical heat flux; Moisture content; Wildland fire  
  Abstract There are still many open questions related to the fire behavior of live and dead wildland fuels and their senescence process. We have physically and biochemically studied live and dead pinus radiata needles, their aging process, and their fire behavior using a systematic aging procedure which allows to characterize the evolution of the fuel moisture content and the photosynthetic pigments over time, and to determine the period of time after sample collection in which specimens can be considered to be alive. Results show that pine needles stay alive for up to 12 h after collection if they remain attached to the twigs. The influence of senescence on spontaneous ignition was tested on two bench-scale devices, the I-FIT and the SCALA, under discontinuous and continuous configurations, respectively. Live pine needles showed larger critical heat fluxes than dead needles, while dead and re-hydrated samples have increased critical heat fluxes for greater moisture contents. Experimental results were interpreted with thermal models based on a two-phase description of the fuel layer. We established a correlation of the form 1/t(ig)proportional to q(inc)" for both ignition configurations, which is adequate for engineering applications and allows the estimation of effective properties for wildland fuel beds.  
  Address [Reszka, P.; Valdivia, J.] Univ Adolfo Ibanez, Fac Engn & Sci, Santiago, Chile, Email: andres.fuentes@usm.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 0379-7112 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000527282900005 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 1146  
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Author Rivera, J.; Hernandez, N.; Consalvi, JL.; Reszka, P.; Contreras, J.; Fuentes, A. doi  openurl
  Title Ignition of wildland fuels by idealized firebrands Type
  Year 2021 Publication Fire Safety Journal Abbreviated Journal Fire Saf. J.  
  Volume 120 Issue Pages 103036  
  Keywords PILOTED IGNITION; PINE NEEDLES; CONE CALORIMETER; MOISTURE; TIME; BEDS  
  Abstract Experiments were carried out in the Idealized-Firebrand Ignition Test (I-FIT), a bench scale apparatus specifically designed to test the ignition of forest fuel layers from a representative firebrand. A cylindrical heater was used to model the firebrand, which allowed to control the incident radiative heat flux on the specimen, from the critical heat flux up to 25 kW/m2, for five different porosities of the fuel layer. Experimental ignition delay times were interpreted based on a theoretical model of the radiative heating of the fuel layer. Radiative heat transfer within the fuel layer was modeled by using the P1 approximation. In the limit of small ignition delay times an analytical expression was derived to correlate the inverse of the ignition time to the incident heat flux. This analytical expression is used to obtain the ignition temperature and effective properties for the forest fuel layers, namely the product of the fuel volume fraction by solid fuel density and solid heat capacity. Analytical solutions were found to be consistent with experimental data and a correlation relating the inverse of the non-dimensional time-toignition to the non-dimensional heat flux is provided.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0379-7112 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000639876600016 Approved  
  Call Number UAI @ alexi.delcanto @ Serial 1388  
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Author Vera, J. pdf  doi
openurl 
  Title Self-Organization of Vocabularies under Different Interaction Orders Type
  Year 2017 Publication Artificial Life Abbreviated Journal Artif. Life  
  Volume 23 Issue 2 Pages 287-294  
  Keywords Vocabulary; automata networks; interaction orders; naming game  
  Abstract Traditionally, the formation of vocabularies has been studied by agent-based models (primarily, the naming game) in which random pairs of agents negotiate word-meaning associations at each discrete time step. This article proposes a first approximation to a novel question: To what extent is the negotiation of word-meaning associations influenced by the order in which agents interact? Automata networks provide the adequate mathematical framework to explore this question. Computer simulations suggest that on two-dimensional lattices the typical features of the formation of word-meaning associations are recovered under random schemes that update small fractions of the population at the same time; by contrast, if larger subsets of the population are updated, a periodic behavior may appear.  
  Address [Vera, Javier] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Avda Diagonal Las Torres 2640, Santiago, Chile, Email: jxvera@gmail.com  
  Corporate Author Thesis  
  Publisher Mit Press Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1064-5462 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000402704800008 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 738  
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Author Vera, J. pdf  doi
openurl 
  Title An Agent-Based Model for the Role of Short-Term Memory Enhancement in the Emergence of Grammatical Agreement Type
  Year 2018 Publication Artificial Life Abbreviated Journal Artif. Life  
  Volume 24 Issue 2 Pages 119-127  
  Keywords Short-term memory; grammatical agreement systems; language games; language evolution  
  Abstract What is the influence of short-term memory enhancement on the emergence of grammatical agreement systems in multi-agent language games? Agreement systems suppose that at least two words share some features with each other, such as gender, number, or case. Previous work, within the multi-agent language-game framework, has recently proposed models stressing the hypothesis that the emergence of a grammatical agreement system arises from the minimization of semantic ambiguity. On the other hand, neurobiological evidence argues for the hypothesis that language evolution has mainly related to an increasing of short-term memory capacity, which has allowed the online manipulation of words and meanings participating particularly in grammatical agreement systems. Here, the main aim is to propose a multi-agent language game for the emergence of a grammatical agreement system, under measurable long-range relations depending on the short-term memory capacity. Computer simulations, based on a parameter that measures the amount of short-term memory capacity, suggest that agreement marker systems arise in a population of agents equipped at least with a critical short-term memory capacity.  
  Address [Vera, Javier] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Santiago, Chile, Email: jxvera@gmail.com  
  Corporate Author Thesis  
  Publisher Mit Press Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1064-5462 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000431302900003 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 853  
Permanent link to this record
 

 
Author Vera, J.; Goles, E. pdf  doi
openurl 
  Title Automata Networks for Memory Loss Effects in the Formation of Linguistic Conventions Type
  Year 2016 Publication Cognitive Computation Abbreviated Journal Cogn. Comput.  
  Volume 8 Issue 3 Pages 462-466  
  Keywords Automata networks; Linguistic conventions; Working memory; Sharp transition  
  Abstract This work attempts to give new theoretical insights into the absence of intermediate stages in the evolution of language. In particular, a mathematical model, based on automata networks, is proposed with the purpose to answer a crucial question: How a population of language users can reach agreement on linguistic conventions? To describe the appearance of drastic transitions in the development of language, an extremely simple model of working memory is adopted: at each time step, language users simply lose part of their word memories according to a forgetfulness parameter. Through computer simulations on low-dimensional lattices, sharp transitions at critical values of the parameter are described.  
  Address [Vera, Javier; Goles, Eric] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Avda Diagonal Torres 2640, Santiago, Chile, Email: jxvera@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 1866-9956 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000376284900006 Approved  
  Call Number UAI @ eduardo.moreno @ Serial 625  
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