Results 61 to 70 of about 7,636,336 (303)

Relay-assisted WDM-FSO System: A Better Solution for Communication under Rain and Haze Weather Conditions

Journal of Telecommunications and Information Technology, 2017
Among various conventional wireless communication systems, Free Space Optics (FSO) may be distinguished as well, which provides a good level security, high data rates, an enormous bandwidth and negligible susceptibility to electromagnetic interference ...
Navneet Dayal, Preeti Singh, Pardeep Kaur   +2 more
doaj   +1 more source

Artificial molecular machines and motors—Design and control of nanoscale motion

FEBS Letters, EarlyView.
Molecules are constantly moving because of thermal fluctuations, but random motion alone cannot be exploited to perform directional tasks. Artificial molecular machines use chemical, electrical, or light energy to bias this motion. Molecular shuttles, rotary motors, and supramolecular pumps illustrate how nanoscale movement can be controlled and ...
Leonardo Andreoni, Alberto Credi
wiley   +1 more source

Investigations of Quantum Cascade Lasers for Free Space Optics Operating at the Wavelength Range of 8-12 μm [PDF]

, 2011
The paper presents analysis and preliminary investigations of quantum cascade lasers for free space optics. The lasers radiate in the long wavelength IR spectral range (8-12 μm). Because of lower effects of radiation scattering than in the case of 1.5 μm
Szabra, D., Nowakowski, M., Bielecki, Z., Gutowska, M., Wojtas, J., Mikołajczyk, J.   +5 more
core   +1 more source

Going viral − Virus‐targeting nanobodies for research, diagnostics and therapy

FEBS Letters, EarlyView.
The increasing prevalence of viral diseases represents a major threat for global human health. Nanobodies, small binding fragments derived from camelid heavy‐chain antibodies, offer versatile tools for viral research, diagnostics, and antiviral therapy.
Domenic Ebert, Ulrich Rothbauer
wiley   +1 more source

Million-Q free space meta-optical resonator at near-visible wavelengths

Nature Communications
High-quality (Q)-factor optical resonators with extreme temporal coherence are of both technological and fundamental importance in optical metrology, continuous-wave lasing, and semiconductor quantum optics.
Jie Fang, Rui Chen, David Sharp, Enrico M. Renzi, Arnab Manna, Abhinav Kala, Sander A. Mann, Kan Yao, Christopher Munley, Hannah Rarick, Andrew Tang, Sinabu Pumulo, Yuebing Zheng, Vinod M. Menon, Andrea Alù, Arka Majumdar   +15 more
doaj   +1 more source

Comparing the paths of Hedgehog release in artificial and natural settings

FEBS Letters, EarlyView.
Hh morphogens require solubilization factors to overcome their tight association with the plasma membrane and signal to distant cells, but the precise functions of these factors are controversial. Here, we use published in vivo observations as the most relevant evidence to test their suggested functions and discuss contradictions and gaps between in ...
Janna Puschmann, Kay Grobe
wiley   +1 more source

Modulated Quasi-Continuous-Wave Laser Module for Free-Space Optics

Photonics
A quasi-continuous-wave (QCW) laser module based on a half-bridge structure is proposed for the low-voltage silicon photonics application, which forms a continuous-wave (CW) laser output when it equally distributes the heat dissipation into all lasers ...
Chun-Hao Chen, Chun-Hsiung Lin, Hao-Chung Kuo, Yu-Heng Hong, Ching-Yao Liu, Kai-En Lin, Yueh-Tsung Shieh, Shyr-Long Jeng, Edward-Yi Chang, Wei-Hua Chieng   +9 more
doaj   +1 more source

Limits and security of free-space quantum communications

Physical Review Research, 2021
The study of free-space quantum communications requires tools from quantum information theory, optics, and turbulence theory. Here we combine these tools to bound the ultimate rates for key and entanglement distribution through a free-space link, where ...
Stefano Pirandola
doaj   +1 more source

Tumour–host interactions in Drosophila: mechanisms in the tumour micro‐ and macroenvironment

Molecular Oncology, EarlyView.
This review examines how tumour–host crosstalk takes place at multiple levels of biological organisation, from local cell competition and immune crosstalk to organism‐wide metabolic and physiological collapse. Here, we integrate findings from Drosophila melanogaster studies that reveal conserved mechanisms through which tumours hijack host systems to ...
José Teles‐Reis, Tor Erik Rusten
wiley   +1 more source

Α dual‐hop equivalent structure of a generalised multi‐hop free‐space optics network

IET Communications, 2021
The performance of free‐space optics links strongly depends on scintillation effects caused by the atmospheric turbulence appearance. A widely adopted way to counterbalance the expected deterioration due to scintillation is to employ cooperative and ...
Nikolaos A. Androutsos, Hector E. Nistazakis, Harilaos G. Sandalidis, Erich Leitgeb, George S. Tombras   +4 more
doaj   +1 more source