Results 71 to 80 of about 74,044 (308)
Advanced Materials Technologies, EarlyView.A wet ball‐milling method is presented to synthesize iron magnetic nanoparticles and evaluate their magnetic hyperthermia performance. Optimized particles (∼270 nm, Ms ∼114 emu/g) achieve ∼50°C heating under clinically safe alternating magnetic fields, while pulsed‐field operation enables controlled temperature regulation (∼30°C).
Shahriar Mostufa +10 more
wiley +1 more source
Polarization in Low Frequency Radio Astronomy
, 2019 This chapter introduces the concepts of polarimetry in the case of low frequency radio astronomy. In this regime radio waves are usually not the signature of atomic or molecular transitions lines, but rather that of unstable particle distribution functions releasing their free energy through electromagnetic radiation.
openaire +2 more sources
During the 1950s and 1960s, Australia was a world leader in the specialised field of low-frequency radio astronomy, with two geographically distinct areas of activity. One was in the Sydney region, and the other was on the island of Tasmania to the south
Wendt, Harry, Orchiston, Wayne
core +1 more source
Advanced Optical Materials, EarlyView.Structural color generation is an emerging field for digital display and printing applications. This report presents a novel truncated‐cone design and the first use of GaP sandwiched between two layers of TiO2, demonstrating ultra‐bright, tunable colors with a record color gamut.
Md Rumon Miah +2 more
wiley +1 more source
Interaction of suprathermal solar wind electron fluxes with sheared whistler waves: fan instability [PDF]
Annales Geophysicae, 2003 Several in situ measurements performed in the solar wind evidenced that solar type III radio bursts were some-times associated with locally excited Langmuir waves, high-energy electron fluxes and low-frequency electrostatic and electromagnetic ...
C. Krafft, A. Volokitin
doaj +1 more source
Advanced Optical Materials, EarlyView.A 2×2 multiplexed GaAsSb nanowire photodetector array integrated with L‐shaped metasurfaces is developed for miniaturized infrared polarimetry. Leveraging non‐radiating anapole states that facilitate near‐field enhancement, the device demonstrates strong polarization selectivity at 835 nm.
Longsibo Huang +14 more
wiley +1 more source
Low-Frequency Radio Astronomy Prospects
, 2005 Описаны состояние и основные тенденции развития радиоастрономии. Главное внимание уделено прошлому, настоящему и будущему радиоастрономии декаметровых волн. В этой области Украина имеет наивысший потенциал и крупнейшие в мире радиотелескопы УТР-2 и УРАН.
Коноваленко, А.А.
core +1 more source
The Murchison Widefield Array Enters Adolescence: A Personal Review of the Early Years of Operations
GalaxiesThe Murchison Widefield Array (MWA) is a low frequency radio interferometer designed and developed by an international consortium, operated on behalf of the consortium by Curtin University.
Steven J. Tingay
doaj +1 more source
RFI Cancellation for an Array Radio Astronomy System With Receiver Nonlinearity
IEEE Access, 2019 Radio frequency interference (RFI) is an important problem for a radio astronomy system (RAS) due to the very weak radio astronomical signals. Rapid expansions of active wireless systems (AWSs), as well as more demands for spectrum access by both AWS and
Mahmoud E. Abdelgelil, Hlaing Minn
doaj +1 more source
MONITORING OF REGULAR AND SPORADIC IONOSPHERIC VARIATIONS ON THE SINGLE-HOP HF RADIO PATHS [PDF]
Radio Physics and Radio Astronomy, 2018 Purpose: Diagnostics of regular and sporadic ionospheric variations using coherent systematic monitoring of spectral characteristics of the probe HF signals on the inclined singlehop radio paths.
A. I. Reznychenko +2 more
doaj +1 more source