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Author Bustos, C.; Herrera, C.G.; Celentano, D.; Chen, D.M.; Cruchaga, M.
Title Numerical Simulation and Experimental Validation of the Inflation Test of Latex Balloons Type
Year 2016 Publication Latin American Journal Of Solids And Structures Abbreviated Journal Lat. Am. J. Solids Struct.
Volume 13 Issue 14 Pages 2357-2378
Keywords Inflation test of latex balloons; numerical simulation; experimental verification/validation
Abstract Experiments and modeling aimed at assessing the mechanical response of latex balloons in the inflation test are presented. To this end, the hyperelastic Yeoh material model is firstly characterized via tensile test and, then, used to numerically simulate via finite elements the stress-strain evolution during the inflation test. The numerical pressure-displacement curves are validated with those obtained experimentally. Moreover, this analysis is extended to a biomedical problem of an eyeball under glaucoma conditions.
Address [Bustos, Claudio; Chen, Daming; Cruchaga, Marcela] Univ Santiago Chile, USACH, Dept Ingn Mecan, Av Bdo OHiggins 3363, Santiago, Chile, Email: claudio.garcia@uai.cl;
Corporate Author Thesis
Publisher Latin Amer J Solids Structures Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1679-7825 ISBN Medium
Area Expedition Conference
Notes WOS:000387963500006 Approved
Call Number UAI @ eduardo.moreno @ Serial 828
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Author Canessa, E.; Chaigneau, S.
Title Calibrating Agent-Based Models Using a Genetic Algorithm Type
Year 2015 Publication Studies In Informatics And Control Abbreviated Journal Stud. Inform. Control
Volume 24 Issue 1 Pages 79-90
Keywords Agent-based modelling; genetic algorithms; calibration; validation; relational equivalence; complex adaptive systems
Abstract We present a Genetic Algorithm (GA)-based tool that calibrates Agent-based Models (ABMs). The GA searches through a user-defined set of input parameters of an ABM, delivering values for those parameters so that the output time series of an ABM may match the real system's time series to certain precision. Once that set of possible values has been available, then a domain expert can select among them, the ones that better make sense from a practical point of view and match the explanation of the phenomenon under study. In developing the GA, we have had three main goals in mind. First, the GA should be easily used by non-expert computer users and allow the seamless integration of the GA with different ABMs. Secondly, the GA should achieve a relatively short convergence time, so that it may be practical to apply it to many situations, even if the corresponding ABMs exhibit complex dynamics. Thirdly, the GA should use a few data points of the real system's time series and even so, achieve a sufficiently good match with the ABM's time series to attaining relational equivalence between the real system under study and the ABM that models it. That feature is important since social science longitudinal studies commonly use few data points. The results show that all of those goals have been accomplished.
Address [Canessa, Enrique] Univ Adolfo Ibanez, CINCO, Fac Ingn & Ciencias, Vina Del Mar, Chile, Email: ecanessa@uai.cl;
Corporate Author Thesis
Publisher Natl Inst R&D Informatics-Ici Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1220-1766 ISBN Medium
Area Expedition Conference
Notes WOS:000351892900009 Approved
Call Number UAI @ eduardo.moreno @ Serial 481
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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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