Results 71 to 80 of about 3,977 (207)
Racket sociality: investigating intimidation in North India
Journal of the Royal Anthropological Institute, Volume 31, Issue 3, Page 771-788, September 2025.This article is an ethnographic investigation into acts of intimidation and threats. Theoretically, it dialogues with ‘racket’ – a key analytical term in the sociology of domination, state‐making, and mafias. The anthropology of power, violence, and crime has paid scant attention to the morphology of threats and the ways interpersonal intimidation ...
Lucia Michelutti
wiley +1 more source
Nanophotonics, Volume 14, Issue 17, Page 2909-2922, August 2025.Abstract The terahertz (THz) frequency band has abundant spectrum resources, which is suitable for constructing communication systems with ultra‐high data rates and extremely low latency. Multiple input multiple output (MIMO) devices are crucial for realizing THz communication, and the synchronous transmission and noncorrelation of different channels ...
Jianzhou Huang +4 more
wiley +1 more source
Artificial Neural Network Utilization for FSO Link Performance Estimation [PDF]
, 2014 This paper describes FSO link performance prediction based on available meteorological data using different Artificial Neural Network (ANN) approaches. Several types of ANNs were compared and their performance were evaluated.
Mudroch, M., Zvanovec, S.
core +1 more source
Information &Functional Materials, Volume 2, Issue 2, Page 118-129, June 2025.A two‐junction 1064 nm VCSEL with double antiresonant oxide islands in the top DBR is designed to enhance fundamental transverse mode operation. By optimizing island count, aperture size, thickness, and position, it achieves 36.2 mW output power, 54.8% PCE, and a 33.06 GHz 3 dB bandwidth.
Xuhao Zhang +8 more
wiley +1 more source
International Journal of Satellite Communications and Networking, Volume 43, Issue 3, Page 164-192, May/June 2025.ABSTRACT Quantum key distribution (QKD) allows the generation of cryptographic keys beyond the computational hardness paradigm and is befitting for secure data transmission requiring long‐term security. The communication distance of fiber‐based QKD, however, is limited to a few hundred kilometers due to the exponential scaling of signal attenuation ...
Davide Orsucci +7 more
wiley +1 more source
Review and Analysis of Digital Signal Processing Algorithms for Coherent Optical Satellite Links
International Journal of Satellite Communications and Networking, Volume 43, Issue 3, Page 229-250, May/June 2025.ABSTRACT Coherent optical satellite links enable high‐throughput communication and high accuracy ranging to and between satellites. Due to the ever‐increasing demand for throughput, wavelength division multiplexing of polarization multiplexed optical signals is being considered as a solution to provide high‐speed optical satellite links.
Carl Valjus, Raphael Wolf, Juraj Poliak
wiley +1 more source
Statistics of Received Power Time Series for Optical LEO Satellite Uplinks
International Journal of Satellite Communications and Networking, Volume 43, Issue 3, Page 251-263, May/June 2025.ABSTRACT In free‐space optical satellite communications, a transmitted optical signal is perturbed by pointing inaccuracies and through the atmosphere's index‐of‐refraction turbulence. This leads to signal fluctuations and power fading when detected by a receiver. Knowledge of these signal instability statistics is advantageous for the design of robust
Andrea Carrillo‐Flores +2 more
wiley +1 more source
International Journal of Antennas and Propagation, 2013 Free Space Optics (FSO) links are affected by several impairments: optical turbulence, scattering, absorption, and pointing. In particular, atmospheric optical turbulence generates optical power fluctuations at the receiver that can degrade ...
A. Andò +6 more
doaj +1 more source
Transient response analysis for DC-DC boost converter [PDF]
, 2014 DC-DC Boost Converter and Hybrid Posicast Controller is developed and simulated using MATLAB Simulink software. DC-DC Boost converter has a very high overshoot and a very high settling time which produce oscillated output response.
Libau, Charles Muling
core
Update on the German and Australasian Optical Ground Station Networks
International Journal of Satellite Communications and Networking, Volume 43, Issue 3, Page 147-163, May/June 2025.ABSTRACT Networks of ground stations designed to transmit and receive at visible and infra‐red wavelengths through the atmosphere offer an opportunity to provide on‐demand, high‐bandwidth, secure communications with spacecraft in Earth orbit and beyond. This work describes the operation and activities of current free space optical communications (FSOC)
Nicholas J. Rattenbury +24 more
wiley +1 more source