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Multi-Material ALE with AMR for Modeling Hot Plasmas and Cold Fragmenting Materials

Plasma Science and Technology 2015年第2期17卷 117-128页

作者： Alice KONIGES Nathan MASTERS Aaron FISHER david eder Wangyi LIU Robert ANDERSON david BENSON Andrea BERTOZZI Lawrence Berkeley National Laboratory Lawrence Livermore National Laboratory Jacobs School of Engineering 9500 Gilman Dr.UCSDLa JollaCA 92093USA Department of Mathematics 520 Portola PlazaUCLALos AngelesCA 90095USA

We have developed a new 3D multi-physics multi-material code, ALE-AMR, which combines Arbitrary Lagrangian Eulerian （ALE） hydrodynamics with Adaptive Mesh Refinement （AMR） to connect the continuum to the microstructural regimes. The code is unique in its ability to model hot radiating plasmas and cold fragmenting solids. New numerical techniques were developed for many of the physics packages to work efficiently on a dynamically moving and adapting mesh. We use interface reconstruction based on volume fractions of the material components within mixed zones and reconstruct interfaces as needed. This interface reconstruction model is also used for void coalescence and fragmentation. A flexible strength/failure framework allows for pluggable material models, which may require material history arrays to determine the level of accumulated damage or the evolving yield stress in J2 plasticity models. For some applications laser rays are propagating through a virtual composite mesh consisting of the finest resolution representation of the modeled space. A new 2nd order accurate diffusion solver has been implemented for the thermal conduction and radiation transport packages. One application area is the modeling of laser/target effects including debris/shrapnel generation. Other application areas include warm dense matter, EUV lithography, and material wall interactions for fusion devices.

关键词： multi-physics simulations arbitrary lagrangian eulerian hydrodynamics,adaptive mesh refinement fragmentation laser ray tracing NIF

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Synthesis and Characterization of Hydrogels Based on Potato Starch/Poly(vinyl Alcohol)/N,N′-Methylenebisacrylamide

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Journal of Renewable Materials 2022年第8期10卷 2179-2201页

作者： Diego david Pinzón-Moreno eder Clidio Vicuña-Galindo JoséVulfrano González-Fernández JoséLuis Soto-Gonzales María Verónica Carranza-Oropeza Faculty of Chemistry and Chemical Engineering National University of San MarcosLima15081Peru

Several hydrogels were synthesized by free-radical polymerization in an aqueous medium based on potato starch(PS),poly(vinyl alcohol)(PVA),and N,N′-Methylenebisacrylamide(MBAm),being possible to study these hydrogels as a function of the proportion of components *** this way,the products generated from the synthesis were characterized by swelling and deswelling kinetics,the first swelling being verified with Schott and statistical models,allowing to contrast the proximity between the experimental and theoretical ***,water retention in soil(R%),spectroscopy(FTIR),morphological(SEM),and thermal(TGA and DSC)analysis allowing to know the intrinsic characteristics of the material,increasing in general terms the knowledge of this type of *** this context,it was possible to verify the characteristics and effectiveness of the synthesis and crosslinking of the main *** experimental results obtained show that the synthesized hydrogels present representative swellings consistent with kinetic and statistical models,optimal thermal stability depending on the amount of crosslinker,and excellent water retention in environments such as soil,presenting it as an excellent alternative to be used in agro-industrial applications in an eco-friendly way.

关键词： Hydrogel potato starch polyvinyl alcohol N,N′-Methylenebisacrylamide kinetic swelling and deswelling water retention thermal characterization morphology characterization

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Ellipsometric Study of SiOx Thin Films by Thermal Evaporation

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Open Journal of Inorganic Chemistry 2016年第3期6卷 175-182页

作者： david Salazar Roberto Soto-Molina eder German Lizarraga-Medina Marco Antonio Felix Nicola Radnev Heriberto Márquez Departamento de óptica CICESE Ensenada México Instituto de Ingeniería Universidad Autónoma de Baja California Mexicali México

This paper presents a study of amorphous SiOx thin films by means of Variable Angle Spectroscopic Ellipsometry (VASE) technique. Tauc Lorentz, Lorentz and Cauchy models have been used to obtain physical thickness and complex refractive index (n and k) from experimental data. In order to obtain a wide range to x stoichiometry values, the films were prepared by vacuum thermal evaporation of SiO on glass substrates, under different and controlled deposition conditions.

关键词： Ellipsometry Refraction Index SiOx Thin Films

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Development Of A Fast Affordable Sensitive Test For Hpv Detection In Resource-limited Regions

Development Of A Fast Affordable Sensitive Test For Hpv Dete...

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24th International Papillomavirus Conference and Clinical Workshop

作者： Paul eder david Walmer v Sankarayanayaran Bernhard Weigl Roger Peck John Sellors Attila Lorincz QIAGEN Duke University Medical Center Tata Memorial Hospital Mumbai PATH PATH PATH QIAGEN

＜正＞Cervical cancer incidence worldwide shows a disproportionate prevalence among economically developing regions In the majority of these cases,a limited number of high-risk（HR）types of human papillomavirus（HPV）are associated with the disease Despite the potential of primary prevention measures that include commercially available vaccines for HPV 16 and 18,

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