Results 71 to 80 of about 2,245,350 (289)

High Entropy Wide‐Bandgap Borates with Broadband Luminescence and Large Nonlinear Optical properties

open access: yesAdvanced Functional Materials, EarlyView.
High‐entropy rare‐earth borates exhibit excellent nonlinear optical and broadband luminescence properties arising from multi‐component doping, chemical disorder, increased configurational entropy, and increased lattice and electronic anharmonicity. This formulation enabled us to obtain a large, environmentally stable single crystal with 3X higher laser‐
Saugata Sarker   +14 more
wiley   +1 more source

Comparison of rectangular array and triangular array arrangements of cylindrical cans in corrugated box [PDF]

open access: yesSongklanakarin Journal of Science and Technology (SJST), 2008
Rectangular and triangular array arrangements of cans in a box were mathematically analyzed. A set of developed equations offers systematic approach of comparing two patterns.
Supachai Pisuchpen
doaj  

Hermetic seal for a shaft [PDF]

open access: yes, 1982
An hermetic seal for a linear rod having a portion thereof projected axially through a port defined in a wall for a pressure chamber and supported thereby for omni-directional motion is described.
Lombardi, F.
core   +1 more source

Near-field enhancement and imaging in double cylindrical polariton-resonant structures: Enlarging perfect lens

open access: yes, 2005
We experimentally demonstrate a prototype of a cylindrical enlarging lens capable of enhancing and restoring evanescent fields. The enabling phenomenon is the resonant excitation of coupled surface modes in a system of two cylindrical arrays of small ...
Caloz   +16 more
core   +1 more source

Imaging of Biphoton States: Fundamentals and Applications

open access: yesAdvanced Functional Materials, EarlyView.
Quantum states of two photons exhibit a rich polarization and spatial structure, which provides a fundamental resource of strongly correlated and entangled states. This review analyzes the physics of these intriguing properties and explores the various techniques and technologies available to measure them, including the state of the art of their ...
Alessio D'Errico, Ebrahim Karimi
wiley   +1 more source

The efficiency of systems of spatial radar signal processing on a clutter background with non-isotropic elements of a cylindrical array

open access: yesФизика волновых процессов и радиотехнические системы, 2013
In conjunction with the problem of the target selection on a clutter background with quasi-continuous radiation, the analysis of the spatial radar signal processing is made. The analysis is made for a case of non-isotropic array elements. The calculation
A.D. Pluzhnikov, E.N. Pribludova
doaj  

CHARACTERIZATION AND OPTIMIZATION OF CYLINDRICAL POLARIMETRIC ARRAY ANTENNA PATTERNS FOR MULTI-MISSION APPLICATIONS

open access: yes, 2017
The radiation characteristics of a cylindrical array antenna for Multifunction Phased Array Radar (MPAR) and terminal MPAR (TMPAR) applications are presented. A probe-fed stacked microstrip patch antenna is used for array elements.
H. Saeidi-Manesh, Guifu Zhang
semanticscholar   +1 more source

Head for high speed spinner having a vacuum chuck [PDF]

open access: yes, 1981
The head for a high-speed spinner is characterized by a substantially cylindrical body adapted to be mounted at the distal end of a vertically oriented drive shaft. A vacuum chuck with an upwardly facing chamber is circumscribed by an annular surface for
Lombardi, F.
core   +1 more source

Unraveling Quantitative Sensing Mechanism and Predictive Molecular Metrics for High‐Performance OFET Amine Sensors

open access: yesAdvanced Functional Materials, EarlyView.
This study introduces a novel chloro boron subphthalocyanine/polymer blend OFET sensor achieving 0.005 ppb limit of detection for ammonia at room temperature and high selectivity against similar amines. An original theoretical framework is proposed to describe the sensing mechanism, relating analyte molecular volume and Lewis basicity to sensor ...
Kavinraaj Ella Elangovan   +6 more
wiley   +1 more source

A Design of Vertical Polarized Conformal Antenna and Its Array Based on UAV Structure

open access: yesInternational Journal of Antennas and Propagation, 2017
The designs of conformal antenna and its array usually need to combine with different carrier structures. As for cone or cylindrical carrier, through using of invasive weed optimization (IWO), the conformal array should be the optimized design as the ...
Zhang Wei, Yang Junfeng
doaj   +1 more source

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