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Listar por Patrocinador "Office of Naval Research"

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Listar por Patrocinador "Office of Naval Research"

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    A Machine Learning Approach to Zeolite Synthesis Enabled by Automatic Literature Data Extraction 
    Jensen, Zach; Kim, Edward; Kwon, Soonhyoung; Gani, Terry Z.H.; Román-Leshkov, Yuriy; Moliner Marin, Manuel; Corma Canós, Avelino; Olivetti, Elsa (American Chemical Society, 2019-05-22)
    [EN] Zeolites are porous, aluminosilicate materials with many industrial and "green" applications. Despite their industrial relevance, many aspects of zeolite synthesis remain poorly understood requiring costly trial and ...
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    A priori control of zeolite phase competition and intergrowth with high-throughput simulations 
    Schwalbe-Koda, Daniel; Kwon, Soonhyoung; Paris, Cecilia; Bello-Jurado, Estefanía; Jensen, Zach; Olivetti, Elsa; Willhammar, Tom; Corma Canós, Avelino; Román-Leshkov, Yuriy; Moliner Marin, Manuel; Gomez-Bombarelli, Rafael (American Association for the Advancement of Science (AAAS), 2021-10-15)
    [EN] Zeolites are versatile catalysts and molecular sieves with large topological diversity, but managing phase competition in zeolite synthesis is an empirical, labor-intensive task. In this work, we controlled phase ...
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    A tweaking principle for executive control: neuronal circuit mechanism for rule-based task switching and conflict resolution 
    Ardid-Ramírez, Joan Salvador; Wang, Xiao-Jing (Society for Neuroscience, 2013-12-11)
    [EN] A hallmark of executive control is the brain's agility to shift between different tasks depending on the behavioral rule currently in play. In this work, we propose a "tweaking hypothesis" for task switching: a weak ...
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    Acoustic cloack for airborne sound by inverse design 
    García Chocano, Víctor Manuel; Sanchis, Lorenzo; Díaz Rubio, Ana; Martínez Pastor, Juan P.; Cervera Moreno, Francisco Salvador; Llopis Pontiveros, Rafael; Sánchez-Dehesa Moreno-Cid, José (American Institute of Physics, 2011-08-16)
    [EN] This Letter presents practical realization of a two-dimensional low loss acoustic cloak for airborne sound obtained by inverse design. The cloak consists of 120 aluminum cylinders of 15 mm diameter surrounding the ...
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    Aerogel as a Soft Acoustic Metamaterial for Airborne Sound 
    Guild, Matthew; García Chocano, Víctor Manuel; Sánchez-Dehesa Moreno-Cid, José; Martin, Theodore P.; Calvo, David C.; Orris, Gregory J. (American Physical Society, 2016-03-30)
    Soft acoustic metamaterials utilizing mesoporous structures have been proposed recently as a means for tuning the overall effective properties of the metamaterial and providing better coupling to the surrounding air. In ...
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    Analogue transformation acoustics and the compression of spacetime 
    García Meca, Carlos; Carloni, Sante; Barceló, Carlos; Jannes, Gil Georges Paul; Sánchez-Dehesa Moreno-Cid, José; Martínez Abietar, Alejandro José (Elsevier, 2014-08)
    A recently developed technique known as analogue transformation acoustics has allowed the extension of the transformational paradigm to general spacetime transformations under which the acoustic equations are not form ...
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    Analysis of equivalent anisotropy arising from dual isotropic layers of acoustic media 
    Cai, Liang-Wu; Sánchez-Dehesa Moreno-Cid, José (Acoustical Society of America, 2012-10)
    The equivalence between a single mass-anisotropic layer and two isotropic layers is analyzed by studying two systems: one consists of an anisotropic layer sandwiched between two arbitrarily chosen isotropic media; and the ...
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    Avoiding metallic walls: Use of modal superposition in plasmonic waveguides to reduce propagation loss 
    Rodríguez Fortuño, Francisco José; Engheta, Nader (American Physical Society, 2012-03-16)
    [EN] We theoretically explore the possibility of reducing propagation loss in a metal-insulator-metal (MIM) waveguide, using mode combinations to achieve wall-avoiding field distributions along a certain propagation length. ...
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    Broadband Acoustic Cloaking within an Arbitrary Hard Cavity 
    Kan, Weiwei; García Chocano, Víctor Manuel; Cervera Moreno, Francisco Salvador; Liang, B.; Zou, X.Y.; Yin, L.L.; Cheng, Jianchun; Sánchez-Dehesa Moreno-Cid, José (American Physical Society, 2015-06-26)
    This paper reports the design, fabrication, and experimental validation of a broadband acoustic cloak for the concealing of three-dimensional (3D) objects placed inside an open cavity with arbitrary surfaces. This 3D cavity ...
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    Broadband sound absorption by lattices of microperforated cylindrical shells 
    García Chocano, Víctor Manuel; Cabrera García, Suitberto; Sánchez-Dehesa Moreno-Cid, José (American Institute of Physics, 2012-10-29)
    Absorption of broadband noise by sonic crystals consisting of microperforated cylindrical shells is proposed and experimentally demonstrated. The theoretical study has been performed in the framework of multiple scattering ...
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    Discovering Relationships between OSDAs and Zeolites through Data Mining and Generative Neural Networks 
    Jensen, Zach; Kwon, Soonhyoung; Schwalbe-Koda, Daniel; Paris, Cecilia; Gómez-Bombarelli, Rafael; Román-Leshkov, Yuriy; Corma Canós, Avelino; Moliner Marin, Manuel; Olivetti, Elsa A. (American Chemical Society, 2021-05-26)
    [EN] Organic structure directing agents (OSDAs) play a crucial role in the synthesis of micro- and mesoporous materials especially in the case of zeolites. Despite the wide use of OSDAs, their interaction with zeolite ...
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    Double-negative acoustic metamaterials based on quasi-two-dimensional fluid-like shells 
    Graciá Salgado, Rogelio; Torrent Martí, Daniel; Sánchez-Dehesa Moreno-Cid, José (IOP Publishing: Open Access Journals, 2012-10-31)
    A structured cylindrical scatterer with low-frequency resonances in both the effective bulk modulus and the dynamical mass density is designed and characterized. The proposed scattering unit is made of a rigid cylinder ...
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    DynaSim: a MATLAB toolbox for neural modeling and simulation 
    Sherfey, Jason S.; Soplata, Austin E.; Ardid-Ramírez, Joan Salvador; Roberts, Erik A.; Stanley, David A.; Pittman-Polletta, Benjamin R.; Kopell, Nancy J. (Frontiers Media SA, 2018-03-15)
    [EN] DynaSim is an open-source MATLAB/GNU Octave toolbox for rapid prototyping of neural models and batch simulation management. It is designed to speed up and simplify the process of generating, sharing, and exploring ...
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    Elastic analog of graphene: Dirac cones and edge states for flexural waves in thin plates 
    Torrent Martí, Daniel; Mayou, Didier; Sánchez-Dehesa Moreno-Cid, José (American Physical Society, 2013-03-27)
    An elastic analog of graphene is introduced and analyzed. The system consists of a honeycomb arrangement of spring-mass resonators attached to a thin elastic layer, and the propagation properties of flexural waves along ...
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    Electric Levitation Using ε-Near-Zero Metamaterials 
    Rodríguez Fortuño, Francisco José; Vakil, Ashkan; Engheta, Nader (American Physical Society, 2014-01-22)
    [EN] The ability to manufacture metamaterials with exotic electromagnetic properties has potential for surprising new applications. Here we report how a specific type of metamaterial-one whose permittivity is near zero-exerts ...
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    Electromagnetic absorption in anisotropic photonic crystal of alumina cylinders 
    Carbonell Olivares, Jorge; Sánchez-Dehesa Moreno-Cid, José; Arriaga, J.; Gumen, L.; Krokhin, A. (Elsevier, 2011)
    [EN] We present a theoretical and experimental study of the effective permittivity of a photonic crystal (PC) made of parallel dielectric rods in the long-wavelength limit. Using the plane-wave expansion method we derive ...
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    Enhanced inertia from lossy effective fluids using multi-scale sonic crystals 
    Guild, Matthew; García Chocano, Víctor Manuel; Kan, Weiwei; Sánchez-Dehesa Moreno-Cid, José (American Institute of Physics, 2014-12)
    n this work, a recent theoretically predicted phenomenon of enhanced permittivity with electromagnetic waves using lossy materials is investigated for the analogous case of mass density and acoustic waves, which represents ...
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    Experimental realization of broadband tunable resonators based on anisotropic metafluids 
    Spiousas, Ignacio; Torrent Martí, Daniel; Sánchez-Dehesa Moreno-Cid, José (American Institute of Physics, 2011-06-13)
    This letter demonstrates the mechanical tuning of modes confined in two-dimensional acoustic cavities based on anisotropic metafluids. The employed metafluids have been designed with effective parameters such that the ...
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    Experimental verification of total absorption by a low-loss thin dielectric layer 
    Díaz Rubio, Ana; Hibbins, A.P.; Carbonell Olivares, Jorge; Sánchez-Dehesa Moreno-Cid, José (American Institute of Physics (AIP), 2015-06-15)
    This work presents an experimental demonstration of total absorption by a metal-dielectric metasurface. Following a theoretical proposal [Dıaz-Rubio et al., Phys. Rev. B 89, 245123 (2014)], we have designed and ...
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    Extraordinary absorption by a thin dielectric slab backed with a metasurface 
    Díaz Rubio, Ana; Torrent Martí, Daniel; Carbonell Olivares, Jorge; Sánchez-Dehesa Moreno-Cid, José (American Physical Society, 2014-06)
    The absorption of electromagnetic waves by a thin dielectric slab backed by a metasurface has been comprehensively studied and discussed at microwave frequencies. The metasurface consists of a metallic plate decorated with ...