Results 91 to 100 of about 59,410 (311)

Novel small-size directional antenna for UWB WBAN/WPAN applications [PDF]

, 2005
This paper presents a novel small-size directional antenna design for ultrawide-band wireless body area networks/wireless personal area networks applications.
G. Troster, Klemm, M, Pedersen, Gert F, Kovcs, I Z, M. Klemm, Troster, G, Troster, Gerhard, Pedersen, Gert Frølund; id_orcid, G.F. Pedersen, Kovacs, Istvan Z, I.Z. Kovcs   +10 more
core   +1 more source

A Dislocation Perspective on Strength and Toughness in Ceramics

Advanced Engineering Materials, EarlyView.
Dislocations in ceramics enjoy a long but yet under‐appreciated history. The three research waves for dislocations in ceramics highlight the topic evolution over the last 90 years. This review focuses on the impact of dislocation on strength and toughness in ceramics.
Xufei Fang
wiley   +1 more source

Microstructure, Thermal Transport, and Dry‐Sliding Tribology of Powder‐Metallurgy Al7075 Composites Reinforced With Sol–Gel‐Derived ZnO–rGO Hybrid Nanoparticles

Advanced Engineering Materials, EarlyView.
Sol–gel‐derived ZnO–rGO hybrid nanoparticles enable Al7075 powder‐metallurgy composites to achieve concurrent gains in hardness and thermal conductivity while markedly lowering friction and wear. The hybrid architecture couples ZnO‐based load support with rGO‐assisted lamellar sliding and heat spreading, revealing a promising route toward lightweight ...
Bunyamin Aksakal, Cevher Kursat Macit, Merve Ayık, Hakan Tutumlu   +3 more
wiley   +1 more source

Design of Multiband Balanced Folded Dipole Antenna Based on a Dual-Arm Structure for Mobile Handsets

, 2008
YesIn this paper, a balanced antenna for mobile handset applications with enhanced bandwidth performance, that covers four bands (GSM1800, GSM1900, UMTS and 2.4-GHz WLAN), is investigated.
Abd-Alhameed, R.A., Zhou, D., See, Chan H., Abd-Alhameed, Raed, See, C.H., Excell, P.S., Excell, Peter S., Zhou, Dawei   +7 more
core   +1 more source

Laser‐Induced Graphene from Waste Almond Shells

Advanced Functional Materials, EarlyView.
Almond shells, an abundant agricultural by‐product, are repurposed to create a fully bioderived almond shell/chitosan composite (ASC) degradable in soil. ASC is converted into laser‐induced graphene (LIG) by laser scribing and proposed as a substrate for transient electronics.
Yulia Steksova, Anna Chiara Bressi, Marina Galliani, Attilio Marino, Gianni Ciofani, Eduardo Machado‐Charry, Hilda Gomez Bernal, Alessandra Francini, Luca Sebastiani, Francesco Greco   +9 more
wiley   +1 more source

Design Study of Normal Mode Helical Antenna with Dual-Frequency and Circular Polarization Used in Mobile

Journal of Engineering and Sustainable Development, 2013
In this paper, a compact and low profile internal normal mode helical antenna with dual-frequencies and circular polarization has been proposed. The proposed antenna shows a wider operating bandwidth and it easy to cover the GSM band(890-960 MHz) for ...
Sadiq Kadem Ahmed
doaj  

Bandwidth enhancement for microstrip patch antenna using stacked patch and slot

, 2009
Small size wideband microstrip patch antenna with slot in ground plane and stacked patch fed through microstrip line is presented. By inserting slot on ground plane and stacked patch supported by wall, the bandwidth can improve up to 25% without ...
AbuTarboush, HF, Nilavalan, R, H. F. AbuTarboush, Al-Raweshidy, H, R. Nilavalan, H. S. Al-Raweshidy   +5 more
core   +1 more source

Composites of Shellac and Silver Nanowires as Flexible, Biobased, and Corrosion‐Resistant Transparent Conductive Electrodes

Advanced Functional Materials, EarlyView.
Shellac, a centuries‐old natural resin, is reimagined as a green material for flexible electronics. When combined with silver nanowires, shellac films deliver transparency, conductivity, and stability against humidity. These results position shellac as a sustainable alternative to synthetic polymers for transparent conductors in next‐generation ...
Rahaf Nafez Hussein, Tiago Carneiro Gomes, Eliza Ng, Simon Rondeau‐Gagné, Tricia Breen Carmichael   +4 more
wiley   +1 more source

The study of the ground plane effect on a Multiband PIFA Antenna by using Genetic Algorithm and Particle Swarm Optimization

Journal of Microwaves, Optoelectronics and Electromagnetic Applications
The ground plane plays an important role on the performance of a planar inverted-F antenna (PIFA). In this regard, the ground plane modification using slots is proposed in this research to obtain a dual band antenna for WiMAX application.
L. Wakrim, S. Ibnyaich, M. M. Hassani
doaj   +1 more source

DNA‐Templated 2D Heterostructures as Phototriggered Dynamic Nanohybrids: From Releasing Molecular Loads to Controlling Enzyme Biocatalytic Function

Advanced Functional Materials, EarlyView.
DNA strands are employed both as dynamic linkers and nanoscale templates for the integration of Ag2S nanoparticles on MoS2, which in turn imparted photothermal responsiveness; this feature permits the selective cargo (fluorophore, quantum dots or an enzyme) release from the MoS2 surface in response to local heat induced by light irradiation.
Kai Chen, Haosen Miao, Weiying Hong, Matteo Palma   +3 more
wiley   +1 more source