Results 41 to 50 of about 382,834 (345)
Tracking and analysis of solar radio waves using a low-cost Radio Telescope in urban areas [PDF]
EPJ Web of ConferencesRadio telescopes are specialized instruments to detect radio-waves between 30MHz-300GHz from different astronomical sources. It has ability to capture radio signals from satellites effectively during high light pollution and cloudy weather.
Chandra Isita +3 more
doaj +1 more source
Radio-Wave Propagation and Electromagnetic Surface Waves [PDF]
Proceedings of the National Academy of Sciences, 1947 A Discrepancy and Its Resolution. - The problem of the propagation of radio-waves along the surface of the (plane) earth was first treated in a celebrated paper by A. Sommerfeld (1909).(1) Let the (r, φ)-plane of a cylindric system of coordinates coincide with the plane of the earth surface and let the z-axis point vertically upward.
openaire +3 more sources
Special Purpose Pulsar Telescope for the Detection of Cosmic Gravitational Waves [PDF]
, 2002 Pulsars can be used to search for stochastic backgrounds of gravitational waves of cosmological origin within the very low frequency band (VLF), $10^{-7}$ to $10^{-9}$ Hz. We propose to construct a special 50 m radio telescope.
Wang, Shou-Guan +3 more
core +2 more sources
Advanced Functional Materials, EarlyView.PBTTT‐OR‐R, a C14‐alkoxy/alkyl‐PBTTT polymer derivative, is of substantial interest for optoelectronics due to its specific fullerene intercalation behavior and enhanced charge‐transfer absorption. Comparing this polymer with (S) and without (O) homocoupling defects reveals that PBTTT‐OR‐R(O) forms stable co‐crystals with PC61BM, while PBTTT‐OR‐R(S ...
Zhen Liu +14 more
wiley +1 more source
Smart radio environments empowered by reconfigurable AI meta-surfaces: an idea whose time has come
EURASIP Journal on Wireless Communications and Networking, 2019 Future wireless networks are expected to constitute a distributed intelligent wireless communications, sensing, and computing platform, which will have the challenging requirement of interconnecting the physical and digital worlds in a seamless and ...
Marco Di Renzo +13 more
doaj +1 more source
Numerical studies of the parameters of the perturbed region formed in the lower ionosphere under the action of a directed radio waves flux from a terrestrial source [PDF]
Компьютерные исследования и моделирование, 2018 The paper presents a physico-mathematical model of the perturbed region formed in the lower D-layer of the ionosphere under the action of directed radio emission flux from a terrestrial stand of the megahertz frequency range, obtained as a result of ...
Daria Sergeevna Moiseeva +2 more
doaj +1 more source
Advanced Functional Materials, EarlyView.Novel ferrocene derivatives (e.g., FcPhc2) are used as an ultrathin layer hole‐blocking layer, reducing hole injection from the Ag contact. This results in an ultralow noise spectral density of 1.2 × 10−14 A Hz−1/2, and a high specific detectivity of 8.1 × 1012 Jones at −0.5 V.
Eunyoung Hong +16 more
wiley +1 more source
Moreton Waves and EIT Waves Related to the Flare Events of June 3, 2012 and July 6, 2012
, 2015 We present geometrical and kinematical analysis of Moreton waves and EIT waves observed on June 3, 2012 and Moreton waves observed on July 6, 2012. The Moreton waves were recorded in H$\alpha$ images of Global Oscillation Network Group (GONG) archive and
Admiranto, A. G. +3 more
core +1 more source
Advanced Functional Materials, EarlyView.Intelligent radiative cooling devices, adaptable to various weather conditions, have the potential for year‐round energy savings. This study introduces a sustainable dual‐mode film made from polycaprolactone nanofibers and upcycled chip bags for effective thermal management.
Qimeng Song +4 more
wiley +1 more source
Effect of Density Irregularities on Radio Frequency Wave Propagation in Ionospheric Plasmas [PDF]
EPJ Web of ConferencesDensity irregularities play a vital role in determining how radio frequency (RF) waves travel through plasmas. In the Earth’s ionosphere, these density irregularities also impact radio communication.
Kim Eun-Hwa +5 more
doaj +1 more source