Results 11 to 20 of about 1,011,593 (295)
Comparison of time/phase lags in the hard state and plateau state of GRS 1915+105 [PDF]
, 2013 We investigate the complex behavior of energy- and frequency-dependent time/phase lags in the plateau state and the radio-quiet hard state of GRS 1915+105.
Misra, Ranjeev +4 more
core +2 more sources
High-energy sources at low radio frequency : the Murchison Widefield Array view of Fermi blazars [PDF]
, 2016 This is the accepted version of the following article: Giroletti, M. et al., A&A, 588 (2016) A141, which has been published in final form at DOI: http://dx.doi.org/10.1051/0004-6361/201527817.
A. A. Deshpande +91 more
core +7 more sources
Radio Labeling with Preassigned Frequencies [PDF]
SIAM Journal on Optimization, 2002 Summary: A radio labeling of a graph \(G\) is an assignment of pairwise distinct, positive integer labels to the vertices of \(G\) such that labels of adjacent vertices differ by at least \(2\). The radio labeling problem (RL) consists in determining a radio labeling that minimizes the maximum label that is used (the so-called span of the labeling). RL
Bodlaender, H. L. +4 more
openaire +10 more sources
Dynamical and topological properties of the spin angular momenta in general electromagnetic fields
Communications Physics, 2023 Spin angular momenta play important roles in light–matter interactions, leading to the emergence of the spin Hall effect and topological quasiparticles in modern optics.
Peng Shi +5 more
doaj +1 more source
Observing pulsars and fast transients with LOFAR [PDF]
, 2011 Low frequency radio waves, while challenging to observe,are a rich source of information about pulsars. The LOw Frequency ARray (LOFAR) is a new radio interferometer operating in the lowest 4 octaves of the ionospheric “radio window”: 10–240 MHz, that ...
Alexov, A. +5 more
core +2 more sources
RFID – Radio Frequency Identification
Informatik-Spektrum, 2008 Der Radio Frequency Identification (RFID) wurde sowohl in der wissenschaftlichen als auch in der popularwissenschaftlichen Literatur in der letzten Zeit viel Aufmerksamkeit eingeraumt. Es handelt sich dabei um eine Technologie, mit der Objekte der Realwelt uber Funkwellen identifiziert werden konnen.
Melski, Adam +2 more
openaire +2 more sources
Radio-Frequency Single-Electron Refrigerator [PDF]
Physical Review Letters, 2007 We propose a cyclic refrigeration principle based on mesoscopic electron transport. Synchronous sequential tunnelling of electrons in a Coulomb-blockaded device, a normal metal-superconductor single-electron box, results in a cooling power of $\sim k_{\rm B}T \times f$ at temperature $T$ over a wide range of cycle frequencies $f$.
Pekola JP, Giazotto F, Saira OP
openaire +5 more sources
Single-Electronic Radio-Frequency Refrigerator [PDF]
Physical Review Letters, 2009 We demonstrate experimentally that a hybrid single-electron transistor with superconducting leads and a normal-metal island can be refrigerated by an alternating voltage applied to the gate electrode. The simultaneous measurement of the dc current induced by the rf gate through the device at a small bias voltage serves as an in situ thermometer.
Kafanov, Sergey +6 more
openaire +3 more sources
Construction of optical system for an atomic clock-beyond atomic fountain
Frontiers in Physics, 2022 We demonstrate the construction of the optical system in the atomic clock-beyond atomic fountain based on 87Rb atom. The optical system includes a high-stability laser system and an optical lattice.
Xiumei Wang +21 more
doaj +1 more source
The radio-frequency quadrupole
, 2013 Radio-frequency quadrupole (RFQ) linear accelerators appeared on the accelerator scene in the late 1970s and have since revolutionized the domain of low-energy proton and ion acceleration.
Vretenar, Maurizio
core +1 more source