Results 61 to 70 of about 134,206 (311)

Coupling of Er3+ ions and Plasmonic Modes in Vertical Nanocavities for Spectral Broadening in Telecom Bands

open access: yesAdvanced Materials Technologies, EarlyView.
Left: Illustration of the glass & nanostructures system and the NIR emission at 1.5 µm, where the colored spheres represent the Er3+ ions within the doped glass. Right: Representation of the Stark splitting of the 4I13/2 and 4I15/2 manifolds of the Er3+, illustrating how the plasmonic modes facilitate the emission from the broader Stark manifold ...
Gaston Lozano Calderón   +5 more
wiley   +1 more source

An evaluation methodology for rapidly deployable information and communications technologies in HA/DR [PDF]

open access: yes, 2012
One of the most significant technological challenges after major humanitarian disasters is the rapid deployment of information and communications technologies (ICT) for initial responders.
Gabriel, James Gregory   +5 more
core   +1 more source

Biodegradable Wireless Soil Urea Sensor Using Metamaterial Perfect Absorber for Distributed Deployment in Precision Agriculture

open access: yesAdvanced Materials Technologies, EarlyView.
In this study, we propose a biodegradable wireless soil urea sensor for precision agriculture. The sensor's electromagnetic response varies depending on the urea concentration, allowing the measurement of relative soil urea concentrations by analyzing the time‐transient electromagnetic response.
Yu Tanaami   +5 more
wiley   +1 more source

Striking the right chord and sustaining successful professional development in information and communications technologies

open access: yes, 2007
This article argues that most variants of professional development in information and communications technologies are merely ‘in‐between' processes, the design of which does not pay sufficient attention to important antecedent and post‐engagement ...
Gardner, John   +5 more
core   +1 more source

Non‐Volatile Silicon Mach‐Zehnder Switches with 0.7 π Phase Shift Based on Graphene Heaters and Sb2Se3 Phase Change Material

open access: yesAdvanced Optical Materials, EarlyView.
ABSTRACT Photonic integrated circuits (PICs) can deliver unparalleled performance for future neuromorphic computing applications. Such neuromorphic PICs require a large number of tunable switches, which are typically realized with current‐controlled heaters, resulting in considerable energy consumption.
Jens Samland   +10 more
wiley   +1 more source

A mixed methods approach to prioritizing components of Uganda's eHealth environment

open access: yesThe Pan African Medical Journal, 2015
INTRODUCTION: globally the use of information and communication technologies (ICTs) in healthcare, eHealth, is on the increase. This increased use is accompanied with several challenges requiring uniformly understood and accepted regulations.
Eddie Sefululya Mukooyo   +4 more
doaj   +1 more source

Large Faraday Rotation in Liquid Crystals With Embedded Paramagnetic Ions (Cu2+, VO2+) at Room Temperature

open access: yesAdvanced Optical Materials, EarlyView.
Large Faraday rotation at room temperature is observed in thin films of discotic copper (Cu2+: 3d9) and vanadyl (VO2+: 3d1) enaminoketone complexes. The large Verdet constant originates from a high density of paramagnetic centers, metal‐ligand p−d hybridization and π orbitals involved in optical transitions (identified by DFT calculations), as well as ...
Karolina Łempicka‐Mirek   +8 more
wiley   +1 more source

Multi-gigabit microwave and millimeter-wave communications research at CSIRO [PDF]

open access: yes, 2015
© 2014 IEEE. High speed and long range wireless backhauls are cost-effective alternatives to fibre networks and becoming more and more attractive as the demand for broadband wireless services grows rapidly in recent years.
Guo, YJ, Huang, X, Zhang, JA
core   +1 more source

Broadband Directional Thermal Radiation with Asymmetric Femtosecond Laser‐Processed Surfaces

open access: yesAdvanced Optical Materials, EarlyView.
Femtosecond laser processing is used to scalably create self‐organized angled microstructures which exhibit highly directional emissivity that occurs for all polarizations. Laser parameters are tuned to alter the surface features, control the direction of emission, and enhance the directional emissivity. Electromagnetic modeling is performed to analyze
Andrew Butler   +8 more
wiley   +1 more source

Information and Communication Technologies and Migration [PDF]

open access: yes
Surveying existing literature, this paper starts by identifying links between attainments in human development and the presence of ICTs. The research then looks at instances where ICTs affect the opportunity for migration and how they affect its outcomes.
Hamel, Jean-Yves
core   +1 more source

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