Results 41 to 50 of about 773,168 (371)

Hexagonal-Triangular Combinatorial Structure Based Dual-Band Circularly Polarized Patch Antenna for GAGAN Receivers

open access: yesIEEE Access, 2023
A multilayer gap-coupled dual-band hexagonal microstrip patch antenna is presented for GPS Aided GEO Augmented Navigation (GAGAN) receivers. GAGAN is developed by AAI (Airport Authority of India) and ISRO (Indian Space Research Organization) exclusively ...
C. Sahana, M. Nirmala Devi, M. Jayakumar
doaj   +1 more source

Multilayer Packaging in a Circular Economy

open access: yesPolymers, 2022
Sorting multilayer packaging is still a major challenge in the recycling of post-consumer plastic waste. In a 2019 Germany-wide field study with 248 participants, lightweight packaging (LWP) was randomly selected and analyzed by infrared spectrometry to ...
J. Schmidt   +4 more
semanticscholar   +1 more source

Active multilayer mirrors for reflectance tuning at extreme ultraviolet (EUV) wavelengths [PDF]

open access: yes, 2012
We propose an active multilayer mirror structure for EUV wavelengths which can be adjusted to compensate for reflectance changes. The multilayer structure tunes the reflectance via an integrated piezoelectric layer that can change its dimension due to an
Bayraktar, M.   +6 more
core   +2 more sources

Characterizing interactions in online social networks during exceptional events

open access: yesFrontiers in Physics, 2015
Nowadays, millions of people interact on a daily basis on online social media like Facebook and Twitter, where they share and discuss information about a wide variety of topics. In this paper, we focus on a specific online social network, Twitter, and we
Elisa eOmodei   +2 more
doaj   +1 more source

First direct observation of a nearly ideal graphene band structure [PDF]

open access: yes, 2009
Angle-resolved photoemission and X-ray diffraction experiments show that multilayer epitaxial graphene grown on the SiC(000-1) surface is a new form of carbon that is composed of effectively isolated graphene sheets.
Berger, Claire   +15 more
core   +6 more sources

LFP-Based Gravure Printed Cathodes for Lithium-Ion Printed Batteries

open access: yesMembranes, 2019
Printed batteries have undergone increased investigation in recent years because of the growing daily use of small electronic devices. With this in mind, industrial gravure printing has emerged as a suitable production technology due to its high speed ...
Maria Montanino   +3 more
doaj   +1 more source

Multilayer Three‐Dimensional Woven Silver Nanowire Networks for Absorption‐Dominated Electromagnetic Interference Shielding

open access: yesAdvanced Materials Interfaces, 2023
Secondary electromagnetic reflection is a great challenge in the field of high conductivity electromagnetic interference (EMI) material due to the poor electromagnetic absorption ability.
Qing‐yin Sun   +5 more
doaj   +1 more source

The benefit of Ca in improving pinning of BaZrO3-Y2O3 doubly-doped YBa2Cu3O7-x/Ca0.3Y0.7Ba2Cu3O7-x multilayer nanocomposite films

open access: yesMaterials Research Express, 2023
This work examines the pinning enhancement in BaZrO _3 (BZO) +Y _2 O _3 doubly-doped (DD) YBa _2 Cu _3 O _7 (YBCO) nanocomposite multilayer (DD-ML) films.
Mohan Panth   +5 more
doaj   +1 more source

Folded Empty Substrate Integrated Waveguide With a Robust Transition to Grounded Coplanar Waveguide in the Ku Band

open access: yesIEEE Access, 2021
The benefits of empty substrate integrated waveguide (ESIW) are already well-known and contrasted in the literature. Different variations of transitions are available to maximize the power injection in that structure.
Marcos D. Fernandez   +3 more
doaj   +1 more source

Multilayer graphene under vertical electric field

open access: yes, 2011
We study the effect of vertical electric field (E-field) on the electronic properties of multilayer graphene. We show that the effective mass, electron velocity and density-of-state of a bilayer graphene are modified under the E-field.
Guo, Jing, kumar, S. Bala
core   +1 more source

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