Results 51 to 60 of about 87,816 (289)

Telecommunications and intra-urban trip pattern in Zaria [PDF]

open access: yesTransport, 2008
The concern over the likely impact of space-adjusting technologies like telecommunications has attracted considerable attention in most studies. The focus of this paper is to examine how the proliferation of telecommunications affects intra-urban flow of
A. Ubogu
doaj   +2 more sources

InP-Based Waveguide Triple Transit Region Photodiodes for Hybrid Integration with Passive Optical Silica Waveguides

open access: yesPhotonics, 2015
We report on a novel InP-based 1.55 μm waveguide triple transit region photodiode (TTR-PD) structure for hybrid integration with passive optical silica waveguides.
Vitaly Rymanov   +4 more
doaj   +1 more source

Self‐Assembled Inorganic Nanomembrane Tubes: Rolled‐Up Piezoelectrics for Microacoustic Wave‐Based Actuators and Sensors

open access: yesAdvanced Materials, EarlyView.
This study demonstrates a self‐assembly process to generate free‐standing piezoelectric nanomembranes, forming ultracompact microtubular acoustic wave sensors and actuators. The miniaturized 3D piezoelectric platform reported in this work can be applied in telecommunication, energy harvesting, and acoustofluidics. Moreover, the 3D self‐assembly can add
Raphaël C. L‐M. Doineau   +9 more
wiley   +1 more source

Giant Berry‐phase‐Driven X‐Ray Beam Translations in Strain‐Engineered Semiconductor Crystals

open access: yesAdvanced Materials, EarlyView.
Due to the Berry‐phase effect, X‐rays propagating in deformed crystals undergo large translations, interesting for X‐ray optics applications. Here, the lattice expansion observed upon H irradiation of dilute‐nitride semiconductors is exploited to engineer the deformation landscape of selectively hydrogenated GaAsN epilayers.
Marco Felici   +9 more
wiley   +1 more source

A Cu‐Based Near‐IR Active MOF with an Ion‐Pair Guest Exhibiting Versatile and Selective Gas‐Solid Reactivity

open access: yesAdvanced Materials, EarlyView.
The new Cu‐containing MOF (Me2NH2)(CuICl2)@[Cu4(INA)4Cl2O]·1.5dmf (3) contains a cation and an anion as guests and shows UV‐near‐mid‐IR absorption and near‐IR emission. MOF 3 shows gas‐solid reactivity in the presence of NH3 and HCOOH to yield two new 3D MOF.
Rajat Saha   +10 more
wiley   +1 more source

3D Anodic Alumina Nanoarchitectures: A Decade of Progress from Foundational Science to Functional Metamaterials

open access: yesAdvanced Materials, EarlyView.
Ordered three‐dimensional anodic aluminum oxide (3D‐AAO) nanoarchitectures with longitudinal and transverse pores enable architecture‐driven metamaterials. The review maps fabrication advances, including hybrid pulse anodization, and shows how 3D‐AAO templates tailor properties across magnetism, energy, catalysis, and sensing.
Marisol Martín‐González
wiley   +1 more source

Synergistic Coupling of Host and Electrolyte Achieving 1270 Wh L−1 in Anode‐Free Lithium Metal Batteries

open access: yesAdvanced Materials, EarlyView.
A synergistic combination of a highly reversible host and a commercially viable carbonate‐rich electrolyte enables simultaneous stabilization of both anode and cathode interfaces in anode‐free lithium metal batteries. This integrated strategy delivers exceptional reversibility and a record volumetric energy density of 1270 Wh L−1 (including package) in
Dong‐Yeob Han   +9 more
wiley   +1 more source

The Customer Contentment with Products and Services in Telecommunications Sector in the Slovak Republic

open access: yesCommunications, 2014
Communication is very important for people. Means of communication are constantly increasing and new forms, and ways of communication are developing because of technological innovations.
Anna Krizanova   +2 more
doaj   +1 more source

All‐Printed, Flexible, Organic Thermoelectric Generators for Ambient Operation with Enhanced Performance under Mechanical Bending

open access: yesAdvanced Materials Technologies, EarlyView.
Fully printed bipolar organic thermoelectric generators are fabricated on flexible substrates and characterized entirely under ambient conditions. The devices exhibit Seebeck coefficients up to 30 µV K−1 and output powers up to 8.8 nW, with enhanced performance under bending.
Loup Chopplet   +7 more
wiley   +1 more source

Design of an Innovative Business Model for Mobile Virtual Network Operators

open access: yesKvalita Inovácia Prosperita, 2016
Purpose: The article studies a possible innovative business model for sustainable competitive advantage in current communication technologies. Methodology/Approach: This ethnographic approach consists of contextual interviews with company managers and ...
Miroslav Špaček, Emil Vacík
doaj   +1 more source

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