Results 101 to 110 of about 617,901 (335)

A Collaborative Key Management Protocol in Ciphertext Policy Attribute-Based Encryption for Cloud Data Sharing

open access: yesIEEE Access, 2017
Ciphertext policy attribute-based encryption (CP-ABE) is a promising cryptographic technique for fine-grained access control of outsourced data in the cloud. However, some drawbacks of key management hinder the popularity of its application. One drawback
Guofeng Lin, Hanshu Hong, Zhixin Sun
doaj   +1 more source

Photonic Engineering Enables All‐Passive Upconversion Imaging with Low‐Intensity Near‐Infrared Light

open access: yesAdvanced Functional Materials, EarlyView.
A passive upconversion imaging system enables the observation of scenes illuminated by low‐intensity incoherent near‐infrared light from 750 to 930 nm, by converting it into the visible without the use of external power. The upconverter is enabled by triplet–triplet annihilation in a bulk heterojunction, with absorption enhanced by plasmonic resonators
Rabeeya Hamid   +13 more
wiley   +1 more source

The economic impact of broadband deployment in Kentucky [PDF]

open access: yes
Significant resources are being invested by government and the private sector in broadband infrastructure to increase broadband deployment and use. With a unique dataset of broadband availability (sorted by county), the authors assess whether broadband ...
David Shideler   +2 more
core  

Borehole Volumetric Strainmeter Calibration From a Nearby Seismic Broadband Array at Etna Volcano [PDF]

open access: bronze, 2017
Gilda Currenti   +3 more
openalex   +1 more source

The Realization of Multidirectional, Free‐Standing 3D Plasmonic Nanostructures via 3D Nanoprinting: A Case Study of Fractal Antennas

open access: yesAdvanced Functional Materials, EarlyView.
Free‐standing plasmonic gold‐based fractal antennas are fabricated by 3D nanoprinting, employing focused electron beam induced deposition and an optimized purification method to remove carbon while conserving structural fidelity. Simulation and experiment show broadband plasmonic activity, including customizable polarizability, thereby paving the way ...
Verena Reisecker   +6 more
wiley   +1 more source

Long-term penetration and traffic forecasts for the Western European fixed broadband market [PDF]

open access: yes
The objective with the paper is to describe, analyze and forecast the future fixed broadband penetration and traffic growth in NGN and NGA networks in Western Europe - one of the most advanced telecommunications areas in the world. Analyses show that the
Stordahl, Kjell
core  

Bringing America Up to Speed: States' Role in Expanding Broadband [PDF]

open access: yes, 2010
Describes innovative state programs to expand access to high-quality, high-speed broadband; the National Broadband Plan -- a partnership of state, federal, and local governments; providers; and nonprofits -- and roles and challenges for ...

core  

Broadband acoustic backscatter from crude oil under laboratory-grown sea ice [PDF]

open access: bronze, 2016
Christopher Bassett   +3 more
openalex   +1 more source

Strain‐Activated Photo‐Dehalogenation Unlocks Low‐Energy One and Two‐Photon 3D Microfabrication

open access: yesAdvanced Functional Materials, EarlyView.
5,14‐NMI‐Cz acts, conversely to its 7,10‐NMI‐Cz(7,10‐'dibromo‐2‐(2,6‐diisopropylphenyl)‐1H‐benzo[lmn]carbazolo[9,1‐bc][2,8]phenanthroline‐1,3(2H)‐dione) counterpart, as modular photoinitiator with panchromatic photoactivity, featuring a weak C–Br bond from geometric strain for efficient Type I & II initiation. These studies demonstrate applicability of
Kacper Piskorz   +10 more
wiley   +1 more source

The Broadband Difference [PDF]

open access: yes, 2002
Presents findings from a survey conducted in January and February 2002. Examines how online Americans' behavior and level of satisfaction with the Internet changes with high speed Internet connections at ...
John B. Horrigan, Lee Rainie
core  

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