Results 41 to 50 of about 568,091 (189)

Large-signal stability conditions for semi-quasi-Z-source inverters: switched and averaged models

, 2013
The recently introduced semi-quasi-Z-source in- verter can be interpreted as a DC-DC converter whose input- output voltage gain may take any value between minus infinity and 1 depending on the applied duty cycle. In order to generate a sinusoidal voltage
De Nicolo, Lisandro, Haimovich, Hernan, Middleton, Richard H.   +2 more
core   +1 more source

Load cell for thermionic converter tests [PDF]

, 1970
Stable, low duty cycle transistorized emitter follower load cell controls and absorbs large currents at low voltages. The use of energy storage in capacitors reduces auxiliary power source requirements.
Breitwieser, R., Manista, E. J.
core   +1 more source

What does the local black hole mass distribution tell us about the evolution of the quasar luminosity function? [PDF]

, 2001
We present a robust method to derive the duty cycle of QSO activity based on the empirical QSO luminosity function and on the present-day linear relation between the masses of supermassive black holes and those of their spheroidal host stellar systems ...
Ciotti, Luca, Haiman, Zoltan, Ostriker, Jeremiah P.   +2 more
core   +2 more sources

The duty cycle of the radio mode feedback

Astronomische Nachrichten, 2013
AbstractThe Chandra X‐ray Observatory has revealed X‐ray bubbles in the intracluster medium (ICM) of many nearby clusters, which are thought to be created by the central active galactic nucleus (AGN). However, the duty cycle of such AGN outbursts is not well understood. In order to further understand how cooling is balanced by bubble heating we studied
Bîrzan, L., Rafferty, D.A., Nulsen, P.E.J., McNamara, B.R., Röttgering, H.J.A., Wise, M.W.   +5 more
openaire   +4 more sources

Variable-Frequency Pulse Width Modulation Circuits for Resonant Wireless Power Transfer

Energies, 2021
In this paper, we develop a variable-frequency pulse width modulation (VFPWM) circuit for input control of 6.78-MHz resonant wireless power transfer (WPT) systems.
Li-Chuan Tang, Shyr-Long Jeng, Edward-Yi Chang, Wei-Hua Chieng   +3 more
doaj   +1 more source

The Study of TeV Variability and Duty Cycle of Mrk 421 from 3 Years of Observations with the Milagro Observatory

, 2014
TeV flaring activity with time scales as short as tens of minutes and an orphan TeV flare have been observed from the blazar Markarian 421 (Mrk 421).
Abdo, A. A., Abeysekara, A. U., Allen, B. T., Aune, T., Barber, A. S., Berley, D., Braun, J., Chen, C., Christopher, G. E., Delay, R. S., DeYoung, T., Dingus, B. L., Ellsworth, R. W., Fraija, N., González, M. M., Goodman, J. A., Hays, E., Hoffman, C. M., Hüntemeyer, P. H., Imran, A., Kolterman, B. E., Linnemann, J. T., Marinelli, A., McEnery, J. E., Mincer, A. I., Morgan, T., Nemethy, P., Parkinson, P. M. Saz, Patricelli, B., Pretz, J., Ryan, J. M., Schneider, M., Shoup, A., Sinnis, G., Smith, A. J., Vasileiou, V., Walker, G. P., Williams, D. A., Yodh, G. B.   +38 more
core   +1 more source

Changing of the guards: Strip cover with duty cycling

Theoretical Computer Science, 2012
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Amotz Bar-Noy, Ben Baumer, Dror Rawitz
openaire   +3 more sources

Queue and Priority-Aware Adaptive Duty Cycle Scheme for Energy Efficient Wireless Sensor Networks

IEEE Access, 2020
In Wireless Sensor Networks (WSN), energy efficiency is a fundamental issue that requires attention in the design of communication protocols. Energy waste occurs as a result of collision and idle listening.
Bashir A. Muzakkari, Mohamad A. Mohamed, Mohd F. A. Kadir, Mustafa Mamat   +3 more
doaj   +1 more source

Constant-frequency, variable-duty-cycle multivibrator [PDF]

, 1969
Circuit provides a pulse source of constant frequency with a duty cycle that is adjustable by an external input signal.
Johnson, J. E.
core   +1 more source

Investigation on plasma electrolytic oxidation duty cycle on Ti6Al7Nb titanium alloy performance for biomedical application [PDF]

EPJ Web of Conferences
In the current investigation, surface modification of Ti6Al7Nb is done with the help of the plasma electrolytic oxidation process to understand the effect of duty cycle on its performance.
Pesode Pralhad, Wankhede Sagar, Mugale Manoj, Patil Ravichandra, Hirulkar Nitesh   +4 more
doaj   +1 more source