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For electron optics in graphene, the propagation effect has so far been the only physical mechanism available. The resulting electron-optics-based components are large in size and operate at low temperatures to avoid violating the ballistic transport limits. In this paper, Dirac fermion metasurfaces, electronic counterparts of optical metasurfaces, are introduced for graphene electronics. By a metasurface, formally a linear array of gate-bias-controlled circular quantum dots, the wavefront ofarXiv:2201.02415v2 fatcat:ebeyddcagfhkxhhmixfgpt4yzi
more »... ectron beams can be shaped within a one-quantum-dot-diameter distance, far below the ballistic limits at room temperature. This provides opportunities to create electron-optics-based devices that operate under ambient conditions. Moreover, unlike optical metasurfaces, Dirac fermion metasurfaces have near-perfect operating efficiencies and their high tunability allows for free and fast switching among functionalities. The concept of metasurface electron optics might open up a promising avenue for improving the performance of quantum devices in Dirac fermion materials.
The atmospheric component of the Zebiak-Cane (ZC) coupled model is a simple elegant framework that plays an instrumental role in the investigation of the fundamental coupled dynamics of the tropical ocean-atmosphere interaction and the El Niño/Southern Oscillation (ENSO) phenomenon. We attempt two simple thermal and dynamical modifications to reduce apparently spurious wind activities simulated by this atmospheric model in the eastern tropical Pacific under ENSO sea surface temperature (SST)doi:10.2151/jmsj.2015-033 fatcat:xcxzd4kejzeqpdazm3wsmcvqpq
more »... maly forcing. First, motivated by established observational evidences, we manipulate the anomalous convective heating to be dependent on the sum of mean SST and SST anomalies and the low-level convergence. Second, we add an ad hoc parameterization for the effect of convective momentum transport (CMT) into the zonal momentum balance. By adding a background-dependent efficiency factor into convective heating and further adjusting the convective feedback parameter used in the original model, we are able to substantially reduce the wind bias in the tropical Pacific, especially in the eastern tropical Pacific. Meanwhile, with a simple CMT parameterization, it compensates an over reduction in the central Pacific wind due to the first modification. By comparing the simulated wind anomalies in our modified version with that from the original version and with the observation, we find that the equatorial wind response to observation SST anomaly forcing for the period 1982-2010 has been improved in terms of amplitudes and spatial patterns. We also show that these improvements are carried over to ZC coupled model as well when we add these modifications to coupled simulations.
The propagation of right-hand circularly polarized Airy-Gaussian beams (RHCPAiGBs) through slabs of righthanded materials (RHMs) and left-handed materials (LHMs) is investigated analytically and numerically with the transfer matrix method. An approximate analytical expression for the RHCPAiGBs passing through a paraxial ABCD optical system is derived on the basis of the Huygens diffraction integral formula. The intensity and the phase distributions of the RHCPAiGBs through RHMs and LHMs aredoi:10.1364/josaa.32.002104 pmid:26560925 fatcat:nqtkhqadwjaopppfs5lkvaqqnq
more »... nstrated. The influence of the parameter χ 0 on the propagation of RHCPAiGBs through RHM and LHM slabs is investigated. The RHCPAiGBs possess transverse-momentum currents, which shows that the physics underlying this intriguing accelerating effect is that of the combined contributions of the transverse spin and transverse orbital currents. Additionally, we go a step further to explore the radiation force including the gradient force and scattering force of the RHCPAiGBs.
Schizophrenia is a severe neuropsychiatric disorder with high heritability, though its exact etiopathogenesis is yet unknown. An increasing number of studies point to the importance of white matter anomalies in the pathophysiology of schizophrenia. While several studies have identified the impact of schizophrenia susceptibility gene variants on gray matter anatomy in both schizophrenia patients and healthy risk variant carriers, studies dealing with the impact of these gene variants on whitedoi:10.1016/j.neuroimage.2011.10.012 pmid:22019876 fatcat:mkx7sgpyczgbhje6w7xwmxxv3m
more »... ter integrity are still scarce. We here present a study on the effects of a Dysbindin schizophrenia susceptibility gene variant on fiber tract integrity in healthy young subjects. 101 subjects genotyped for Dysbindin-gene variant rs1018381, though without personal or first degree relative history of psychiatric disorders underwent diffusion tensor imaging (DTI), 83 of them were included in the final analysis. We used Tract-Based Spatial Statistics (TBSS) analysis to delineate the major fiber tracts. Carriers of the minor allele T of the rs1018381 in the Dysbindin gene showed two clusters of reduced fractional anisotropy (FA) values in the perihippocampal region of the right temporal lobe compared to homozygote carriers of the major allele C. Clusters of increased FA values in T-allele carriers were found in the left prefrontal white matter, the right fornix, the right midbrain area, the left callosal body, the left cerebellum and in proximity of the right superior medial gyrus. Dysbindin has been implicated in neurite outgrowth and morphology. Impairments in anatomic connectivity as found associated with the minor Dysbindin allele in our study may result in increased risk for schizophrenia due to altered fiber tracts.
The propagation effect is so far the only available implementation mechanism when electronic components in graphene are developed based on Dirac fermion optics. The resulting optics-inspired components are large in size and operate normally only in the lowest possible temperature environment so that the ballistic limits are not violated. Here electron metasurfaces based on the generalized Snell's law, a linear array of gate-bias-controlled circular quantum dots in form, are proposed todoi:10.48550/arxiv.2201.02415 fatcat:ia4iwqohifbnjgvqgmnk2cyvvq
more »... e graphene electrons within the distance of the quantum-dot diameter, far less than the ballistic limits at room temperature. This provides opportunities to create untracompact optics-inspired components which are comparable in size to components arising from other principles and hence can operate at any temperature below room temperature. Moreover, unlike their optical counterparts, electron metasurfaces have near-perfect operation efficiencies and their high tunability allows for free and fast switching among functionalities. The conceptually new metasurfaces open up a promising avenue to pull optics-inspired components to a desired level of performance and flexibility.
Rui Huang The University of Texas at Austin, USA; and email email@example.com . ... Huang is a professor of aerospace engineering and engineering mechanics and holds the endowed position of the Pearlie Dashiell Henderson Centennial Fellowship in Engineering at The University of Texas ...doi:10.1557/mrs.2015.10 fatcat:vdtmwdxwbvg43i3tq47tjwfhe4
Fang Qian and Yat Li ❐ Rui Huang is in the Department of Aerospace Engineering and Engineering Mechanics, University of Texas at Austin, Austin, Texas 78712, USA. e-mail: firstname.lastname@example.org ... Rui Huang news & views in the blister test with a constant number of molecules, which allows the radius of the blister (which is increasing) and the internal pressure (which is decreasing) to be measured ...doi:10.1038/nnano.2011.150 pmid:21897383 fatcat:5wx7ofibcvcjdhwxyryf2coeam
Citation Song G K, Huang R, Cheng H, et al. Adaptive compensation for time-varying uncertainties in modelbased control of lower-limb exoskeleton systems. ... * Corresponding author (email: email@example.com)Song G K, et al. ...doi:10.1007/s11432-019-2754-9 fatcat:isaotprrdredzaysbhv65kpxoi
2 at ␦ =1/3, similar to the pull-in instability in elastically suspended parallel-plate electrostatic actuators. 16 However, this is unphysical in the present system because the a͒ Electronic mail: ruihuang ...doi:10.1063/1.2099526 fatcat:z7q7xtonajc5re3ousw2cbdtnm
First author: Liu Donghui Email: Idh2v006@yahoo.com.cn Lii Ruihuang, Xu Jianguo*, Xu Fang, Liu Yating, Zhao Jun, Tan Wei. ... First author: Huang Yanping Email: firstname.lastname@example.org Yin Xiaoying, Luo Yongming, Hu Yuzhu. ...doi:10.1016/s2095-1779(11)70025-9 fatcat:psvj7njhozbqtgnndgyb3p3sgm
E-mail: email@example.com 2 Staff Scientist, Polymers Division, National Institute of Standards and Technology, Gaithersburg, MD 20899. 3 Assistant Professor, Dept. of Chemical Engineering, Arizona ... It was found that, for such cases, it is the surface stress that is relevant for the stability of the film ͑Huang and Suo 2003͒. ...doi:10.1061/(asce)0893-1321(2007)20:1(38) fatcat:ohlw22sj6fcbvjirpzainuoue4
Thin Solid Films
E-mail address: firstname.lastname@example.org (R. Huang). SOL structure. The structure can be fabricated by wafer bonding or by deposition. ... Following Huang and Suo w25x, we write wsq sin(kx), 1 usq cos(kx), (7) where q and q are the amplitudes of the perturbation, 1 2 and k is the wavenumber. ...doi:10.1016/s0040-6090(03)00065-8 fatcat:ynyiou3eybb5rmsbcfja7vf26i
Huang are with the Department of Aerospace Engineering and Engineering Mechanics, The University of Texas at Austin, Austin, TX 78712 USA (e-mail: email@example.com). ...doi:10.1109/tdmr.2014.2310705 fatcat:wzt3azqwozaxnavynbik6yz4pm
Huang are with the Research Center for Mechanics of Solids, Structures and Materials, Department of Aerospace Engineering and Engineering Mechanics, The University of Texas, Austin, TX 78712 (e-mail: ruihuang ... Rui Huang received his B.S. degree in Theoretical and Applied Mechanics from the University of Science and Technology of China in 1994 and his Ph.D. degree in Civil and Environmental Engineering, with ...doi:10.1109/tuffc.2006.1593373 fatcat:h2p5qu7fhzawlncqkvy433jrhe
Huang and Z. Suo ... differential equations. 13, 14 In the lubrication theory, the Navier-Stokes equations for incompressible viscous flow reduce to a͒ Author to whom correspondence should be addressed; electronic mail: ruihuang ...doi:10.1063/1.1427407 fatcat:ityiagcnsbgvnhpuptsb2wgaum
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