Results 71 to 80 of about 279,049 (350)
Laser Terminals on CubeSats: Developments for Telecommunications and Quantum Links
International Journal of Satellite Communications and NetworkingABSTRACTSatellite‐based laser communication is an emerging technology that is finding its way from research to industry. Compared to radio frequency (RF) systems, it has a more efficient size, weight, and power budget and, furthermore, is license free. The required space laser terminals can be designed in different sizes, depending on the mission needs.
Roubal, Christian +8 more
openaire +3 more sources
The effect of variation in atmospheric absorption on millimetric, terrestrial, telecommunications links [PDF]
Radio Science, 2005 When planning the link budget for millimeter and submillimeter wave telecommunications links, the attenuation by atmospheric gasses is taken into account. However, at millimetric frequencies above 50 GHz it may become necessary to account for the temporal variations in absorption when calculating fade margins.
Kevin S. Paulson, Kevin S. Paulson
openaire +3 more sources
Advanced Materials, EarlyView.This study proposes tribenzyl organic cation carried multidentate X‐type Lewis soft base to enhance adhesion and passivate defects simultaneously, aiming to achieve foldable and efficient perovskite nanocrystal‐based light‐emitting diodes. The resulting pure red F‐PeLEDs exhibit a recorded high EQE of 16.2% and robust mechanical properties to endure ...
Benzheng Lyu +9 more
wiley +1 more source
Rational Regulatory Policy for the Digital Economy: Theory and EU Policy Options [PDF]
Telecommunications is a key element of the ICT sector which has been shaped by strong innovation dynamics since the 1990s. Market dynamics in selected OECD telecommunications markets are analyzed.
Paul J.J. Welfens
core +3 more sources
Telecommunications system design considerations for advanced logistic spacecraft [PDF]
, 1969 The telecommunications system design goals and functional requirements for an advanced logistic spacecraft are presented qualitatively. Advanced equipment and techniques that meet these system requirements and goals, that are within the state-of-the-art ...
Romberg, James Myron
core +1 more source
Light‐Emitting Diodes Based on Metal Halide Perovskite and Perovskite Related Nanocrystals
Advanced Materials, EarlyView.The review covers the past and current developments in light‐emitting diodes (LEDs) exploiting nanocrystals of halide perovskites and perovskite‐related materials. The review examines the aspects of material optimizations, device engineering, and applications.
Ying Liu +7 more
wiley +1 more source
[Review of] Arjun Appadurai, Modernity at Large, Cultural Dimensions of Globalization [PDF]
, 1996 Modernity at Large is a collection of essays (most of which are reprinted from other sources, e.g., Public Culture) that link the themes of modernity and globalization to contemporary everyday social practice, and to group individual identity ...
Schau, Hope J.
core +1 more source
Statistical Channel Modeling for Long-Range Ground-to-Air FSO Links [PDF]
arXiv, 2021 To provide high data rate aerial links for 5G and beyond wireless networks, the integration of free-space optical (FSO) communications and aerial platforms has been recently suggested as a practical solution. To fully reap the benefit of aerial-based FSO systems, in this paper, an analytical channel model for a long-range ground-to-air FSO link under ...
arxiv
Advanced Materials, EarlyView.From oil refining to high refractive index photopolymers for bulk plastic optics. The synthesis of a new photopolymer resin derived from inexpensive sulfur petrochemicals is reported affording a high‐quality optical glass that is amenable to a wide range of photopolymerization‐based fabricated methods, including 3D Printing, for precision plastic ...
Chisom Olikagu +20 more
wiley +1 more source
Phase- coherent comparison of two optical frequency standards over 146 km using a telecommunication fiber link [PDF]
, 2009 We have explored the performance of two "dark fibers" of a commercial telecommunication fiber link for a remote comparison of optical clocks. The two fibers, linking the Leibniz University of Hanover (LUH) with the Physi-kalisch-Technische Bundesanstalt (PTB) in Braunschweig, are connected in Hanover to form a total fiber length of 146 km.
arxiv +1 more source