Results 21 to 30 of about 2,330,608 (285)

A Novel Low-Cost Compact High-Performance Flower-Shaped Radiator Design for Modern Smartphone Applications

open access: yesMicromachines, 2023
This manuscript examines the design principle and real-world validation of a new miniaturized high-performance flower-shaped radiator (FSR). The antenna prototype consists of an ultracompact square metallic patch of 0.116λ0 × 0.116λ0 (λ0 is the free ...
Zaheer Ahmed Dayo   +10 more
doaj   +1 more source

Decomposing locally compact groups into simple pieces [PDF]

open access: yes, 2008
We present a contribution to the structure theory of locally compact groups. The emphasis is on compactly generated locally compact groups which admit no infinite discrete quotient.
Bourbaki   +18 more
core   +2 more sources

Compactness and local compactness in hyperspaces

open access: yesTopology and its Applications, 2002
In their interesting paper the authors treat compactness and relative compactness of subsets of hyperspaces, where the hyperspaces are considered to be equipped with the Vietoris, the Wijsman and partly the Hausdorff metric topology. Included in the paper are also characterizations of local compactness with respect to the mentioned hyperspace ...
COSTANTINI, Camillo, S. LEVI, J. PELANT
openaire   +2 more sources

A Review of Reconfigurable Leaky-Wave Antennas

open access: yesIEEE Access, 2021
A comprehensive survey of the reconfigurable leaky-wave antennas (LWAs) is made in this paper. Beam-steering and unique radiating features of LWA are highlighted particularly.
Nima Javanbakht   +3 more
doaj   +1 more source

Compact coalgebras, compact quantum groups and the positive antipode [PDF]

open access: yes, 2009
In this article -that has also the intention to survey some known results in the theory of compact quantum groups using methods different from the standard and with a strong algebraic flavor- we consider compact o-coalgebras and Hopf algebras.
Abella, A., Haim, M., Santos, W. Ferrer
core   +4 more sources

On Countable Compactness and Sequential Compactness [PDF]

open access: yesProceedings of the American Mathematical Society, 1984
If a countably compact T 3 {T_3} space X X can be expressed as a union of less then c c many first countable subspaces, then MA implies that X X is sequentially compact.
openaire   +1 more source

Building Capacity as Anchor Institutions: Infrastructure, Structure, and Strategy

open access: yesMetropolitan Universities, 2019
As campuses embrace their role as anchor institutions, considerations should be given to the role of infrastructure, structure, and strategy. This article differentiates between infrastructure and organizational structure then identifies implications for
Kristin Elise Norris, H. Anne Weiss
doaj   +1 more source

On the properties of compact groups identified in different photometric bands [PDF]

open access: yes, 2016
Historically, compact group catalogues vary not only in their identification algorithms and selection functions, but also in their photometric bands. Differences between compact group catalogues have been reported.
Diaz-Gimenez, Eugenia   +4 more
core   +2 more sources

Design of a compact K-band transceiver front-end module

open access: yesDianzi Jishu Yingyong, 2023
A compact and low-cost transceiver front-end module is designed for point-to-point radio communication system in this paper. The transceiver module contains one receive channel, one transmit channel, two groups of LO synthesizers in limited area.
Wang Yi
doaj   +1 more source

Techno-economic process optimization for a range of membrane performances: What provides real value for point-source carbon capture?

open access: yesCarbon Capture Science & Technology
Membranes provide a unique opportunity for heavy industry decarbonization and a real solution requires optimal system design. We use a superstructure process model to minimize capital and operational expenses for post-combustion carbon capture systems ...
Joshua C. Watson   +3 more
doaj   +1 more source

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