Due to the rapid development of space industry, ever higher demands are being made for optimization and improvement spacecraft thermal management systems. Thermal control technology has become one key bottlenecks that restrict level design. In this paper, technologies (TMTs) electronics reviewed according different heat transfer processes, including acquisition, transport, rejection. The researches on efficient acquisition include utilization high conductance materials, novel package...

A two-dimensional mass-spring system with Honeycomb lattice for mimicking phononic quantum Hall effect is proposed. Its band structure shows the existence of Dirac cones and unconventional edge states that similar to vibrational modes in graphene. Interestingly, as placed on a constantly rotational coordinate system, Coriolis force resulted from non-inertial reference frame provides possibility break time-reversal symmetry. Thus, caused topologically non-trivial gaps, are present between...

In order to confine waves beyond the diffraction limit, advances in fabrication techniques have enabled subwavelength structuring of matter, achieving near-field control light and other types waves. The price is often expensive needs irreversibility device functionality, as well introduction impurities, a major contributor losses. this Letter, we propose temporal inhomogeneities, such periodic drive electromagnetic properties surface which supports guided modes, an alternative route for...

Never having seen an object and heard its sound simultaneously, can the model still accurately localize visual position from input audio? In this work, we concentrate on Audio-Visual Localization Segmentation tasks but under demanding zero-shot few-shot scenarios. To achieve goal, different existing approaches that mostly employ encoder-fusion-decoder paradigm to decode localization information fused audio-visual feature, introduce encoder-prompt-decoder paradigm, aiming better fit data...

We report a switchable time-varying mirror, composed of an indium-tin-oxide--gold bilayer, displaying tenfold modulation reflectivity ($\mathrm{\ensuremath{\Delta}}R\ensuremath{\approx}0.6$), which saturates for driving-pump intensity ${I}_{\mathrm{pump}}\ensuremath{\approx}100\phantom{\rule{0.2em}{0ex}}\mathrm{GW}/{\mathrm{cm}}^{2}$. Upon interacting with the saturated frequency content reflected pulse is extended up to 31 THz, well beyond pump spectral (2.8 THz). interpret broadening as...

We develop a compact theory that can be applied to variety of time-varying dispersive materials. The continuous-wave reflection and transmission coefficients are replaced with equivalent operator expressions. In addition comparing this approach existing numerical analytical techniques, we find the eigenfunctions these operators represent pulses do not change their spectra after interaction time-varying, material. addition, poles nontime harmonic bound states system.

We investigate the plasmonic resonance modes and coupling effects of single silver nanobeads nanobead dimers. Numerical investigation using three-dimensional finite element method indicates that exhibit two resonances corresponding to bonding anti-bonding modes, respectively. The boundary symmetry on inner outer surfaces can be broken by increasing refractive indices cores filling dielectric holes. It is shown only mode found for low-refractive index cores, whereas both high-refractive cores.

The vines and leaves of Momordica charantia L. are used as herbal medicines to treat inflammation-related disorders. However, their safety profile remains uncharacterized, the constituents in extracts that exert anti-inflammatory adverse effects remain unclear. This study isolated characteristic cucurbitane-type triterpenoid species M. analyzed cytotoxicity, effects, underlying mechanisms. Four structurally related triterpenoids-momordicines I, II, IV, (23E)...

This study investigates the generation of a large complete momentum gap (k-gap) in Lorentzian media with plasma frequency varying periodically time. By using energy expression for Lorentz model, Maxwell's equations are reformulated as time-dependent Hamiltonian, allowing an analytical solution Floquet band structure. Our simulations reveal k-gap whose width remains nearly unchanged resonance ω0 increases. Numerical analyses further indicate that emerges when modulation Ω approaches magnitude...

We propose an innovative active imaging device named gain-assisted hybrid-superlens hyperlens and examine its resolving power theoretically. This semi-cylindrical consists of a core super-lens half cylindrical outer shell hyperlens. Both the superlens parts are appropriately designed multi-layered metal-dielectric structures having indefinite eigenvalues dielectric tensors. The layers doped with Coumarin, which play role gain medium. medium is analyzed thoroughly using generic four-level...

We propose an angle multiplexing method for optics-based image encryption using a phase-only computer-generated hologram (POCGH) in the tilted Fresnel transform (TFrT) domain. Modified Gerchberg-Saxton algorithms, based on three types of rotation manipulation both and reconstruction planes, are used with their corresponding TFrT parameters to extract functions (POFs) target images. All extracted POFs then phase-modulated summed obtain final POCGH, which is capable avoiding overlap...

Objectives To determine the prevalence of possible sarcopenia and its association with other conditions in older adults Bengbu, China. Design, setting participants A cross-sectional study 1082 community-dwelling Chinese people aged at least 60 years from March to June 2022. Methods Handgrip strength information regarding associated were collected. Possible was estimated based on handgrip cut-off values (<28 kg men; <18 women) recommended by Asia Working Group for Sarcopenia 2019....

We derive the electromagnetic energy density in a chiral metamaterial consisting of uncoupled single-resonance helical resonators. Both lossless and absorptive cases are studied, is shown to be positively definite. The key relation making derivation successful proportionality between magnetization rate change electric polarization medium. same time-domain formulation also applies bianisotropic medium proposed by Zhang et al. [Phys. Rev. Lett.102, 023901...

We show that multiple Weyl and double-Weyl points (DWPs) arise in a chiral elastic system through stacking two-dimensional honeycomb mechanical structures. On the distinct kz plane, band structures calculated from tight-binding (TB) model exhibit (WPs) at Brillouin vertices DWPs centres. Based on TB model, practical structure can be constructed by 3D printing technology. The numerical calculation illustrates several as expected our analysis of model. To verify topological feature, charge...

We show that an acoustic metamaterial consisting of array spinning cylindrical inclusions can possess many unusual properties, including folded bulk bands and interface-state bands. The folding inside the first Brillouin zone is made possible by a rotation-induced antiresonance compressibility rotational Doppler effect. Both band dispersions exhibit remarkable filling-fraction-dependent features such as emergence cutoff frequency when filling fraction exceeds critical value. Robust one-way...

Time-interfaces, at which the optical properties of a medium undergo abrupt and spatially uniform changes, have attracted surging interest in optics wave physics. In this work, we study scattering time-interfaces involving chiral media. Dual to spatial interfaces media, show that propagating is split upon time-interface into two orthogonal circular polarization waves oscillating different frequencies. We formulate temporal boundary-value problem such time-interfaces, then demonstrate effect...

The objective of this study was to compare three methods for localization impacted maxillary canines using only conventional panoramic radiographs.The radiographs 94 patients (102 canines) were reviewed and evaluated the magnification, angulation superimposition. actual positions them decided with cone beam CT images. predicted from magnification compared McNemar χ(2) test. Sensitivity, specificity, accuracy, positive-likelihood ratio negative-likelihood calculated. canine-incisor index...

Abstract We demonstrate strongly collimated beam formation, at audible frequencies, in a three-dimensional acoustic phononic crystal where the wavelength is commensurate with elements; seemingly simple rectangular cuboid constructed from closely-spaced spheres, and yet demonstrates rich wave phenomena acting as canonical metamaterial. employ theory, numerical simulation experiments to design interpret this phenomenon use consisting of finite array <mml:math...

Taking as bioinspiration the remarkable acoustic absorption properties of moth wings, we develop a simple analytical model that describes interaction between pressure fields, and thin elastic plates incorporating resonant sub-structures. The wing is an exemplar natural metamaterial; wings are deeply subwavelength in thickness at frequencies interest, broadband tiny scales resonate on acting concert. simplified incorporates only essential physics idealized to flat rigid rectangular coupled...

Primary lymphoma of the cerebellopontine angle (CPA) is rare in central nervous system. To our knowledge, there have only been 14 cases reported worldwide so far. Here, we report findings a 57-year-old man, who presented with bilateral sudden hearing loss followed by left facial palsy within 1 month. Radiologic study and magnetic resonance imaging showed homogeneous enhancing mass, 1.6 x 0.5 1.1cm size, CPA cistern region mild extension to internal auditory canal. The tumor was removed...

We show that Floquet topological insulating states can exist in two-dimensional photonic crystals made of time-variant optical materials. By arranging the modulating phases, it facilitates effective gauge fields give rise to effects. The band structures demonstrate existence topologically non-trivial bandgaps, thereby leading back-scattering immune unidirectional edge owing bulk-edge correspondence. With these first-principle numerical results, we then verify order for every via Wilson loop...