Results 41 to 50 of about 1,442,765 (346)

The X-ray fast-time variability of Sco X-2 (GX 349+2) with RXTE [PDF]

, 2001
Sco X-2 (GX 349+2) is a low-mass X-ray binary and Z source. We have analysed 156 ks of Rossi X-ray Timing Explorer data, obtained in 1998 January, on this source. We investigated the fast-time variability as a function of position on the Z track.
Agrawal, Alpar, Belloni, Berger, Bildsten, Bradt, Dieters, Dieters, E. Kuulkers, Fortner, Hasinger, Hasinger, Hertz, Homan, Jonker, Jonker, Jonker, Klein, Klein, Kuulkers, Kuulkers, Lamb, Lamb, Lewin, M. Van Der Klis, Mineshige, O'Neill, O'Neill, Orosz, P. M. O'Neill, Ponman, Psaltis, Psaltis, Psaltis, R. K. Sood, Schulz, Shibazaki, Steiman-Cameron, Stella, Stella, Stella, Sunyaev, Titarchuk, Titarchuk, Van Der Klis, Van Der Klis, Van Der Klis, Van Der Klis, Van Der Klis, Van Der Klis, Van Der Klis, Van Der Klis, Van Der Klis, Van Der Klis, Wijnands, Wijnands, Wu, Young, Yu, Zhang   +59 more
core   +2 more sources

Sprites in low‐frequency radio noise [PDF]

Geophysical Research Letters, 2013
Low‐frequency radio noise is the electromagnetic background radiation which is compared here to the luminosity of 39 sprites recorded with a low‐light video camera. It is found that the sprite luminosities coincide with ∼10–30 ms long sudden enhancements of the electromagnetic background radiation ∼6–8 μV m−1Hz−1/2(∼6–9 dB) with a relative maximum near
Füllekrug, M., Mezentsev, A., Soula, S., Van Der Velde, O., Farges, T.   +4 more
openaire   +2 more sources

FET input voltage amplifier for low frequency noise measurements

Metrology and Measurement Systems, 2020
The paper presents a low noise voltage FET amplifier for low frequency noise measurements. It was built using two stages of an op amp transimpedance amplifier.
Krzysztof Achtenberg, Janusz Mikołajczyk, Zbigniew Bielecki   +2 more
doaj   +1 more source

Low Frequency Noise Annoyance Assesment by Low Frequency Noise Rating (LFNR) Curves

Journal of Environmental Conservation Engineering, 1983
Over recent years, it has become apparent that low frequency noise annoyance is more widespread than originally believed. Annoyance has occurred where the emitted noise is unbalanced towards the low frequencies even though the dB(A) level has been low.
Toshio Watanabe, Shinji Yamada, N. Broner, H.G. Leventhall   +3 more
openaire   +4 more sources

Low frequency noise and annoyance in classroom [PDF]

Noise Notes, 2000
The most common method for noise assessment is the A-weighted sound pressure level. The question has been raised as to whether the frequency weighting with an A-filter gives a correct result when assessing the annoyance response to noise containing strong low frequency noise (LFN) components.
Kjell Holmberg, Ulf Landström, Pär Lundquist   +2 more
openaire   +2 more sources

Investigating the effect of noise channels on the quality of unitary t-designs [PDF]

Physical Review A 108, 052414 (2023), 2022
Unitary t-designs have a wide variety of applications in quantum information theory, such as quantum data encryption and randomised benchmarking. However, experimental realisations of t-designs are subject to noise. Here we investigate the effect of noise channels on the quality of single-qubit t-designs.
arxiv   +1 more source

Low frequency cultural noise [PDF]

Geophysical Research Letters, 2009
Abnormal cultural seismic noise is observed in the frequency range of 0.01–0.05 Hz. Cultural noise generated by human activities is generally observed in frequencies above 1 Hz, and is greater in the daytime than at night. The low‐frequency noise presented in this paper exhibits a characteristic amplitude variation and can be easily identified from ...
Chang-Eob Baag, Tae-Seob Kang, Jin Soo Shin, Dong-Hoon Sheen   +3 more
openaire   +2 more sources

On the Control of Low-Frequency Audible Noise from Electrical Substations: A Case Study

Applied Sciences, 2020
With the world facing the urgency of energy transition, the development of efficient and quiet electrical infrastructures is of topical importance in the construction of the environment of the future.
Edoardo Alessio Piana, Nicolaas Bernardus Roozen   +1 more
doaj   +1 more source

Performance of DPSK Signals with Quadratic Phase Noise [PDF]

IEEE Transactions on Communications, vol. 53, no. 8, pp. 1361-1365, August 2005, 2004
Nonlinear phase noise induced by the interaction of fiber Kerr effect and amplifier noises is a quadratic function of the electric field. When the dependence between the additive Gaussian noise and the quadratic phase noise is taking into account, the joint statistics of quadratic phase noise and additive Gaussian noise is derived analytically.
arxiv   +1 more source

Very low frequency noise reduction in orthogonal fluxgate

AIP Advances, 2018
In this paper we present a simple, cheap and effective method to obtain reduction of very low frequency noise in an orthogonal fluxgate in fundamental mode.
Mattia Butta, Michal Janosek
doaj   +1 more source