Results 21 to 30 of about 41,682 (296)
Pulsating stars in NGC 6231 Frequency analysis and photometric mode identification near the main sequence [PDF]
, 2013 We used Johnson UBV photometric CCD observations to identify pulsating and other variable stars in the young open cluster NGC 6231. The multi-color information was used to classify pulsating variables, perform frequency analysis, and - where possible ...
Handler, Gerald +2 more
core +1 more source
RF or THz signals generated from DC biased multimode lasers [PDF]
, 2007 Although self pulsating (SP) lasers are DC biased, they feature a modulation of the output power. For the results presented in this paper, the SP frequency corresponds to the frequency spacing between longitudinal modes or its second harmonic.
Landais, Pascal +2 more
core +1 more source
Discovery of coherent millisecond X-ray pulsations in Aql X-1 [PDF]
, 2007 We report the discovery of an episode of coherent millisecond X-ray pulsation in the neutron star low-mass X-ray binary Aql X-1. The episode lasts for slightly more than 150 seconds, during which the pulse frequency is consistent with being constant.
A. Patruno +8 more
core +5 more sources
Variable frequency picosecond optical pulse generation from laser diodes by electrical feedback [PDF]
, 1985 High repetition rate picosecond optical pulse generation is achieved by providing electrical feedback (with and without external gain) to a self-pulsating laser diode. The feedback improves pulsation short-term stability (
Izadpanah, S. H. +4 more
core +1 more source
TEMPERATURE CHARACTERISTICS FOR PULSATION FREQUENCY IN GONIONEMUS [PDF]
Journal of General Physiology, 1928 The frequency of contraction of the bell of Gonionemus was studied in relation to temperature, with intact animals and also where different operations were made on the nervous system. A number of values of µ are found for intact animals namely 8,100±, 10,500±, 32,000± and 22,500±, with critical temperatures at 9.6°, 12.3°, and 14.0°.
openaire +2 more sources
Energy Conversion and Management: X, 2022 A characteristic of radial turbines for turbocharger applications subject to pulsating flow is the deviation of the turbine performance compared with corresponding continuous flow conditions, typically associated with gas-stand experiments.
Roberto Mosca, Mihai Mihaescu
doaj +1 more source
RF communication with implantable wireless device: effects of beating heart on performance of miniature antenna [PDF]
, 2014 The frequency response of an implantable antenna is key to the performance of a wireless implantable sensor. If the antenna detunes significantly, there are substantial power losses resulting in loss of accuracy.
Bahmanyar, MR +6 more
core +1 more source
Wavelets: a powerful tool for studying rotation, activity, and pulsation in Kepler and CoRoT stellar light curves [PDF]
, 2014 Aims. The wavelet transform has been used as a powerful tool for treating several problems in astrophysics. In this work, we show that the time-frequency analysis of stellar light curves using the wavelet transform is a practical tool for identifying ...
Bravo, J. P. +4 more
core +1 more source
Case Studies in Thermal Engineering, 2023 This paper presents a numerical investigation of the operation of a solar air heater (SAH) with cylindrical shape ribs under turbulent pulsating flow based on thermal and frictional considerations.
Naeim Farouk +8 more
doaj +1 more source
Meitan kexue jishuPulsating hydraulic fracturing technology has demonstrated advantages such as lower initiation pressure and complex fracture networks in reservoir stimulation fields including gas extraction, shale gas development, and geothermal exploitation. Currently,
Quangui LI +8 more
doaj +1 more source