Results 51 to 60 of about 1,996 (263)

Highly Compact Through-Wire Microstrip to Empty Substrate Integrated Coaxial Line Transition

Applied Sciences, 2021
Empty substrate integrated coaxial line (ESICL) technology preserves the many advantages of the substrate integrated technology waveguides, such as low cost, low profile, or integration in a printed circuit board (PCB); in addition, ESICL is non ...
Marcos D. Fernandez, José A. Ballesteros, Angel Belenguer   +2 more
doaj   +1 more source

Mechanochemical Synthesis and Characterization of Nanostructured ErB4 and NdB4 Rare‐Earth Tetraborides

Advanced Engineering Materials, Volume 27, Issue 6, March 2025.
ErB4 and NdB4 nanostructured powders are produced by mechanochemical synthesis. 5 h mechanical alloying and 4 M HCl acid leaching are used in the production. ErB4 and NdB4 powders exhibit maximum magnetization of 0.4726 emu g−1 accompanied with an antiferromagnetic‐to‐paramagnetic phase transition at about TN = 18 K and 0.132 emu g−1 with a maximum at ...
Burçak Boztemur, Faruk Kaya, Bora Derin, Mustafa Lütfi Öveçoğlu, Ju Li, Duygu Ağaoğulları   +5 more
wiley   +1 more source

A Novel Four-Arm Planar Spiral Antenna for GNSS Application

IEEE Access, 2021
This letter introduces a novel four-arm planar spiral antenna which provides a perfect circular polarization radiation for Global Navigation Satellite System applications. The antenna mainly consists of four parts: an Archimedes spiral radiation area, an
Lili Guo, Peihua Zhang, Fanchao Zeng, Zhiya Zhang, Chengbin Zhang   +4 more
doaj   +1 more source

Characterization of Defect Distribution in an Additively Manufactured AlSi10Mg as a Function of Processing Parameters and Correlations with Extreme Value Statistics

Advanced Engineering Materials, EarlyView.
Predicting extreme defects in additive manufacturing remains a key challenge limiting its structural reliability. This study proposes a statistical framework that integrates Extreme Value Theory with advanced process indicators to explore defect–process relationships and improve the estimation of critical defect sizes. The approach provides a basis for
Muhammad Muteeb Butt, Varma Kvvssn, Hossein Laieghi, Zia Uddin, Peyman Ansari, E. Kıvanç Sadak, Can Barış Toprak, Hüseyin Kızıl, Enrico Salvati   +8 more
wiley   +1 more source

Forced Flow Patterns in a Miniature Planar Spiral Transformer with Ferrofluid Core [PDF]

INCAS Bulletin, 2015
Energy harvesting devices (EHD) utilize small-scale components with low power losses. Key parts, the electric power transformers (EPTs) are to convert the voltage/current electromagnetic parameters from the primary, energy harvesting stage, to the ...
J. B. DUMITRU, A. M. MOREGA, M. MOREGA, L. PISLARU-DANESCU   +3 more
doaj   +1 more source

On the Fourier transform of the indicator function of a planar set. [PDF]

Transactions of the American Mathematical Society, 1969
Suppose C is a compact subset of the plane having a piecewise smooth boundary AC. Let F(r, 0) be the Fourier transform, in polar coordinates, of the indicator function of the set C, where by the indicator function of C, we mean the function whose value on C is 1, and whose value on the complement of C is 0.
openaire   +1 more source

NONLINEAR INVARIANTS OF PLANAR POINT CLOUDS TRANSFORMED BY MATRICES [PDF]

Facta Universitatis, Series: Mathematics and Informatics, 2019
The goal of this paper is to present invariants of planar point clouds, thatis functions which take the same value before and after a linear transformation of aplanar point cloud via a 2 × 2 invertible matrix. In the approach we adopt here, theseinvariants are functions of two variables derived from the least squares straight line ofthe planar point ...
Kotsios, Stelios, Melas, Evangelos
openaire   +4 more sources

On the Lightweight Potential of Laser Additive Manufactured NiTi Triply Periodic Minimal Sheet Lattices

Advanced Engineering Materials, EarlyView.
This study explores the lightweight potential of laser additive‐manufactured NiTi triply periodic minimal surface sheet lattices. It systematically investigates the effects of relative density and unit cell size on surface quality, deformation recovery, compression behavior, and energy absorption.
Haoming Mo, Shuo Qu, Shiming Gao, Xu Song   +3 more
wiley   +1 more source

Innovative Processing of Compacted Waste Aluminum Alloy Powders via Controlled Remelting and Solidification

Advanced Engineering Materials, EarlyView.
This study demonstrates an efficient recycling route for out‐of‐spec AlSi10Mg atomized powders through compaction and arc remelting followed by suction casting. By correlating compaction load, cooling rate, and resulting microstructure, we show that intermediate pressures (50–80 kN) and rapid cooling refine dendrites, reduce porosity, and enhance ...
Mila Christy de Oliveira, Marcella Gaute Cavalcante Xavier, Abdoul‐Aziz Bogno, Piter Gargarella, José Eduardo Spinelli   +4 more
wiley   +1 more source

On-Line Partial Discharge Monitoring System for Power Transformers Based on the Simultaneous Detection of High Frequency, Ultra-High Frequency, and Acoustic Emission Signals

Energies, 2020
The article presents a novel on-line partial discharge (PD) monitoring system for power transformers, whose functioning is based on the simultaneous use of three unconventional methods of PD detection: high-frequency (HF), ultra-high frequency (UHF), and
Wojciech Sikorski, Krzysztof Walczak, Wieslaw Gil, Cyprian Szymczak   +3 more
doaj   +1 more source