Results 51 to 60 of about 2,420,038 (307)

Experimental investigation of the performance of different modulation techniques under controlled FSO turbulence channel [PDF]

, 2010
This paper experimentally investigates and compares the performance of the free space optics system employing three different modulation schemes, on-off keying (OOK) with nonreturn- to-zero (NRZ) and return-to-zero (RZ) and the binary phase shift keying (
Z. Ghassemlooy, Adebanjo, Olusegun, O. Adebanjo, S. Ansari, S. Rajbhandari, Ghassemlooy, Zabih, H. Le Minh, Ansari, S., A. Gholami, Rajbhandari, Sujan, Ijaz, Muhammad, M. Ijaz, Le Minh, Hoa   +12 more
core   +1 more source

Current Status and Challenges in Data Collection for Aerospace Coatings Deposited by Plasma Spraying

Advanced Engineering Materials, EarlyView.
An innovative approach has been integrated into the GRENAT project to optimize plasma spraying and coating performance. Raw materials are accelerated and melted in the plasma generated by torches, creating coatings. Monitoring sensors collect process data which are combined with ex situ characterization data.
Lila Randriamananjara, Vincent Rat, Quentin Dubreuil, Patrice Valorge, Simon Goutier, Alain Denoirjean, Olivier Messe, Céline Ruelle, Jean‐Philippe Poli   +8 more
wiley   +1 more source

Performance optimization of free-space optical communication protocols based on results from FSO demonstrations [PDF]

, 2007
The mobile free-space optical channel mainly suffers from relatively long link outages, produced by short-term blockings of the line-of-sight (obstacles, clouds), pointing- and tracking-errors or deep signal-fades caused by index of refraction turbulence
Bernhard Epple, Epple, Bernhard
core   +1 more source

Interaction‐Driven Assembly Pathways in Heterogeneous Active Microrobotic Systems

Advanced Functional Materials, EarlyView.
Peanut‐ and cube‐shaped light‐powered microrobots exhibit distinct magnetic and photocatalytic responses that determine their heterogeneous self‐assembly. In the dark, magnetic dipole interactions drive colloidal copolymerization with cubes acting as nucleation centers, whereas under light irradiation, phoretic interactions compete with magnetic ...
Domenico Calabrò, Roshan Velluvakandy, Martin Pumera, Francesco Priolo, Salvo Mirabella, Mario Urso   +5 more
wiley   +1 more source

MIMO free-space optical communication employing subcarrier intensity modulation in atmospheric turbulence channels [PDF]

, 2009
In this paper, we analyse the error performance of transmitter/receiver array free-space optical (FSO) communication system employing binary phase shift keying (BPSK) subcarrier intensity modulation (SIM) in clear but turbulent atmospheric channel ...
Ghassemlooy, Zabih, Popoola, Wasiu Oyewole, Wasiu O. Popoola, Ahmadi, Vahid, Erich Leitgeb, Leitgeb, Erich, Vahid Ahmadi, Zabih Ghassemlooy   +7 more
core   +1 more source

Bioinspired Adaptive Surfaces for Intelligent Liquid Manipulation: Progressing From Passive and Active to Hybrid Strategies

Advanced Materials, EarlyView.
This review examines passive, active, and hybrid liquid manipulation strategies, highlighting hybrid approaches as an emerging route to reconcile energy efficiency with adaptive control. By actively reconstructing passive surfaces to store programmable interfacial energy, hybrid systems enable flexible yet low‐power liquid transport, with perspectives ...
Jiaqi Miao, Yiyuan Zhang, Liqiu Wang, Alan C. H. Tsang   +3 more
wiley   +1 more source

Incoherent Shock and Collapse Singularities in Non-Instantaneous Nonlinear Media

Applied Sciences, 2018
We study the dynamics of a partially incoherent optical pulse that propagates in a slowly responding nonlinear Kerr medium. We show that irrespective of the sign of the dispersion (either normal or anomalous), the incoherent pulse as a whole exhibits a ...
Gang Xu, Adrien Fusaro, Josselin Garnier, Antonio Picozzi   +3 more
doaj   +1 more source

Investigation of turbulence effect on the free space optical link for ground-to-train communications [PDF]

, 2011
There is a growing demand for high mobility and ultrafast internet/data services which drives the motivation for free space optical (FSO) communications for high speed trains.
Ghassemlooy, Zabih, Paudel, Rupak, Livingstone, Bryan, Rajbhandari, Sujan, Le Minh, Hoa   +4 more
core  

The Evolution of Aerosol Jet Printing, A Review: Enhancing Material Versatility and Improvements for Next‐Generation Applications

Advanced Materials Technologies, EarlyView.
Aerosol Jet Printing (AJP) has emerged as a versatile additive manufacturing technique for high‐resolution, conformal, and multi‐material printing. This review highlights advances in printable materials, substrate compatibility, post‐processing, characterization, and process innovations, while critically discussing current challenges and future ...
Chandrachur Chatterjee, Rocco Lupoi, Michael J. Gibbons   +2 more
wiley   +1 more source

A coherent optical link through the turbulent atmosphere [PDF]

EFTF-2010 24th European Frequency and Time Forum, 2010
version 2, modified following comments from colleagues and ...
Djerroud, K., Acef, O., Clairon, A., Lemonde, P., Nari Man, Ch., Samain, E., Wolf, P.   +6 more
openaire   +4 more sources