Results 111 to 120 of about 660,831 (348)

Adaptive multibeam antennas for spacelab. Phase A: Feasibility study [PDF]

The feasibility was studied of using adaptive multibeam multi-frequency antennas on the spacelab, and to define the experiment configuration and program plan needed for a demonstration to prove the concept.
Allen, C. C., Applebaum, S. P., Popowsky, W. J., Wouch, G.   +3 more
core   +1 more source

On‐Demand Activation of Thin Alginate Shell Encapsulated Volatile Liquid for Untethered Pneumatic Soft Actuation

Advanced Engineering Materials, EarlyView.
Phase‐changing liquids enable untethered pneumatic actuation in soft robotics but suffer from volatility and storage challenges. This work reports a simple method to encapsulate Novec 7000 within micron‐thin alginate shells via in situ injection and ionic crosslinking.
Rayan A. M. Basodan, Jack Keddie, Byoungyoul Park, Hyun‐Joong Chung   +3 more
wiley   +1 more source

Aerodynamic Performance and Coupling Gain Effect of Archimedes Spiral Wind Turbine Array

Journal of Marine Science and Engineering
The Archimedes spiral wind turbine (ASWT), as a novel type of horizontal-axis wind turbine, is well suited for remote islands. To explore the aerodynamic performance and coupling gain effect of ASWT array, a three-dimensional numerical simulation was ...
Ke Song, Huiting Huan, Liuchuang Wei, Chunxia Liu   +3 more
doaj   +1 more source

A Study on Efficient Configuration of Array for Phased Aray Antenna with Hybrid Phased Shifting Device [PDF]

, 2018
Jin-Woo Jung, Hyung-Soon An, Sung-Il Park   +2 more
openalex   +1 more source

Structural Design Concepts for a Multi-Megawatt Solar Electric Propulsion (SEP) Spacecraft [PDF]

As a part of the Space Exploratory Initiative (SEI), NASA-Lewis is studying Solar Electric Propulsion (SEP) spacecraft to be used as a cargo transport vehicle to Mars.
Hickman, J. Mark, Lawrence, Charles
core   +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

Distributed Radar Main-lobe Interference Suppression Method Via Joint Optimization of Array Configuration and Subarray Element Number

Leida xuebao
To address the ineffectiveness of single-base radar in suppressing adjoint main-lobe interference, an equivalent large-aperture array can be designed by deploying sparse auxiliary arrays to separate main-lobe interference from targets in the spatial ...
Kaifa ZHAO, Hu SONG, Rong LIU, Xinhai WANG   +3 more
doaj   +1 more source

Three-Dimensional Coprime Array for Massive MIMO: Array Configuration Design and 2D DOA Estimation [PDF]

, 2020
Pan Gong, Tanveer Ahmed, Jianfeng Li
openalex   +1 more source

Selection of the most sensitive configuration of strip array detectors for x-ray beam monitoring in radiotherapy of cancer utilizing singular value decomposition [PDF]

, 2022
Wolfgang Högele, Piotr Zygmanski
openalex   +1 more source

Surface Tension Measurement of Ti‐6Al‐4V by Falling Droplet Method in Oxygen‐Free Atmosphere

Advanced Engineering Materials, EarlyView.
In this article, the temperature‐dependent surface tension of free falling, oscillating Ti‐6Al‐4V droplets is investigated in both argon and monosilane doped, oxygen‐free atmosphere. Droplet temperature and oscillation are captured with one single high‐speed camera, and the surface tension is calculated with Rayleigh's formula.
Johannes May, Finn‐Lennard Janthur, Lena Kreie, Michael Müller, Sarah Seffer, Nick Schwarz, Jörg Hermsdorf, Thomas Hassel, Stefan Kaierle, Ludger Overmeyer   +9 more
wiley   +1 more source