Results 41 to 50 of about 617,901 (335)

ISOTROPY ANALYSIS OF METAMATERIALS

open access: yesInformatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, 2015
Metamaterials – artificial periodic structures with subwavelength feature sizes – can be characterized with macroscopic electromagnetic properties, like refractive index and wave impedance, just like homogeneous materials.
Arnold Kalvach, Zsolt Szabó
doaj   +1 more source

BCoE Creates Internet Safety Checklist [PDF]

open access: yes, 2019
The University of New Hampshire Broadband Center of Excellence (BCoE) has created a checklist for individuals to use in assessing their vulnerability to threats originating from their use of the Internet wherever they are linked – home or public ...
Broadband Center of Excellence (BCoE)
core   +2 more sources

Hopfield Neural Networks for Online Constrained Parameter Estimation With Time‐Varying Dynamics and Disturbances

open access: yesInternational Journal of Adaptive Control and Signal Processing, EarlyView.
This paper proposes two projector‐based Hopfield neural network (HNN) estimators for online, constrained parameter estimation under time‐varying data, additive disturbances, and slowly drifting physical parameters. The first is a constraint‐aware HNN that enforces linear equalities and inequalities (via slack neurons) and continuously tracks the ...
Miguel Pedro Silva
wiley   +1 more source

Philanthropy's Role in Creating a Connected America [PDF]

open access: yes, 2009
Outlines how foundations can support capacity building and expanding broadband access to underserved communities by leveraging the federal Broadband Infrastructure and Broadband Technologies Opportunity Programs through matching grants and ...

core  

Ferrocene Derivatives Enable Ultrasensitive Perovskite Photodetectors with Enhanced Reverse Bias Stability

open access: yesAdvanced Functional Materials, EarlyView.
Novel ferrocene derivatives (e.g., FcPhc2) are used as an ultrathin layer hole‐blocking layer, reducing hole injection from the Ag contact. This results in an ultralow noise spectral density of 1.2 × 10−14 A Hz−1/2, and a high specific detectivity of 8.1 × 1012 Jones at −0.5 V.
Eunyoung Hong   +16 more
wiley   +1 more source

Context-Based e2e Autonomous Operation in B5G Networks

open access: yesSensors
The research and innovation related to fifth-generation (5G) networks that has been carried out in recent years has decided on the fundamentals of the smart slice in radio access networks (RANs), as well as the autonomous fixed network operation.
Shaoxuan Wang, Marc Ruiz, Luis Velasco
doaj   +1 more source

A Broad-Band Wide-Angle Linear-to-Circular Polarization Converter Based on Stripline Metasurface

open access: yesIEEE Access, 2021
This paper proposes a broad-band linear-to-circular polarization converter based on a multi-layer stripline metasurface. The structure is constructed of three stripline metallic layers stacked with two dielectric plates, and it has different ...
Zuning Yang   +5 more
doaj   +1 more source

Comparison of precoding methods for broadband MIMO systems [PDF]

open access: yes, 2009
In this paper we investigate non-linear precoding solutions for the problem of broadband multiple-input multipleoutput (MIMO) systems. Based on a broadband singular value decomposition (BSVD) we can decouple a broadband MIMO channel into independent ...
Alhanafy, W.E.A.E., Weiss, S.
core   +1 more source

Broadband teleportation [PDF]

open access: yesPhysical Review A, 2000
27 pages, 7 figures, revised version for publication, Physical Review A (August 2000); major changes, in parts ...
van Loock, P.   +2 more
openaire   +3 more sources

Intermolecular Interactions as Driving Force of Increasing Multiphoton Absorption in a Perylene Diimide‐Based Coordination Polymer

open access: yesAdvanced Functional Materials, EarlyView.
This study uncovers the unexplored role of intermolecular interactions in multiphoton absorption in coordination polymers. By analyzing [Zn2tpda(DMA)2(DMF)0.3], it shows how the electronic coupling of the chromophores and confinement in the MOF enhance two‐and three‐photon absorption.
Simon Nicolas Deger   +11 more
wiley   +1 more source

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