Results 31 to 40 of about 184,389 (296)

Optical control of photon tunneling through an array of nanometer scale cylindrical channels

, 2002
We report first observation of photon tunneling gated by light at a different wavelength in an artificially created array of nanometer scale cylindrical channels in a thick gold film.
A. Krishnan, A. Lewis, A. Stanishevsky, A. V. Zayats, C. C. Davis, D.I. Kavaldjiev, E. Betzig, I. I. Smolyaninov, I.I. Smolyaninov, I.I. Smolyaninov, K. Yang, L. Salomon, N.E. Glass, T.W. Ebbesen, V. Kuzmiak, W.L. Barnes   +15 more
core   +1 more source

Aperture Field Reconstruction by Calculated Cylindrical Near Field [PDF]

, 2008
An approximate general formula to calculate the directivity of an array of antennas by a cylindrical near field acquisition is proposed. We demonstrate the role of and scan area truncation effects.
Besada Sanmartin, Jose Luis, Castelo Boso, Alcino, Haro Ariet, Leandro de   +2 more
core   +2 more sources

Handbook of Establishing and Maintaining Oxygen‐Free Atmospheres

Advanced Engineering Materials, EarlyView.
This study presents a practical framework for creating oxygen‐free atmospheres at ambient pressure using silane‐doped inert gases. The results show that ultra‐low oxygen levels and strongly reduced water content can be achieved through controlled silane dosing, drying systems, and sensor monitoring.
Sascha Jan Zimmermann, René Gustus, Lienhard Wegewitz, Wolfgang Maus‐Friedrichs   +3 more
wiley   +1 more source

Near-field and high-resolution cylindrical noise source location method based on vector sound pressure array

Zhongguo Jianchuan Yanjiu, 2017
The existing underwater noise source near-field location method usually assumes that the measurement plane is flat, which increases the difficulty of applying the underwater noise target test for cylindrical distribution. Simultaneously, the conventional
ZUO Xiang, CHEN Huan
doaj   +1 more source

Finite element simulation of microphotonic lasing system

, 2012
We present a method for performing time domain simulations of a microphotonic system containing a four level gain medium based on the finite element method.
Fietz, Chris, Soukoulis, Costas
core   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

Advanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal, Michael M. Becker, Sarah C. L. Fischer   +2 more
wiley   +1 more source

Proof-of-Concept of a Monopulse Antenna Architecture Enabling Radar Sensors in Unmanned Aircraft Collision Avoidance Systems for UAS in U-Space Airspaces

Applied Sciences
In this paper, we propose and prove an innovative radar antenna concept suitable for collision avoidance (CA) systems installed onboard small, unmanned aircraft (UA).
Javier Ruiz Alapont, Miguel Ferrando-Bataller, Juan V. Balbastre   +2 more
doaj   +1 more source

Modified Cylindrical Antenna Array for Maritime Applications [PDF]

TransNav
The article presents modifications of a cylindrical antenna array dedicated to a communication system in marine ap-plications. The possibilities of spatial filtration were investigated by simulation to obtain low sidelobe levels of the 20 dBc order.
Jaroslaw Stepien, Leszek Kachel
doaj   +1 more source

Design, Analysis, and Optimization of the Array of Axial Rectangular Slots on a Cylindrical Waveguide

IEEE Access, 2021
In the current work, for the first time, the design equations for an array of rectangular slots axially placed on a cylindrical waveguide are driven and presented, making it possible to attain asymmetrical and non-broadside patterns with higher ...
Mahmoud Sharafi Masouleh, Amin Kargar Behbahani, Malek Adjouadi   +2 more
doaj   +1 more source

Al–Cu Composite Casting of Laser‐Deoxidized Copper: Bonding, Interfacial Chemistry, and Thermal Conductivity

Advanced Engineering Materials, EarlyView.
This study investigates laser‐based oxide removal of Cu inserts in oxygen‐free conditions and examines long‐term oxidation kinetics and surface chemistry under different atmospheres via X‐ray photoelectron spectroscopy. Al–Cu compound casting with differently oxidized surfaces is performed, and intermetallic phase formation, morphology, and thermal ...
Timon Steinhoff, Finn‐Lennard Janthur, Sascha Zimmermann, Sarah Seffer, Jörg Hermsdorf, René Gustus, Ludger Overmeyer, Wolfgang Maus‐Friedrichs, Hans Jürgen Maier, Christian Klose   +9 more
wiley   +1 more source