Results 271 to 280 of about 3,842,952 (321)
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Acta Astronautica, 1989
Abstract Up to now it has been considered that omnidirectional beacons and continuous emissions should be used to attract the attention of extraterrestrial intelligences. The case is considered here of using instead narrow beams directed consecutively to many targets, thus emitting to each target signals of short duration. A discussion on theoretical
Georg M. Gruber, Jorg Pfleiderer
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Abstract Up to now it has been considered that omnidirectional beacons and continuous emissions should be used to attract the attention of extraterrestrial intelligences. The case is considered here of using instead narrow beams directed consecutively to many targets, thus emitting to each target signals of short duration. A discussion on theoretical
Georg M. Gruber, Jorg Pfleiderer
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On the duty cycle of cyclotrons
Nuclear Instruments and Methods, 1962The poor (1–6%) duty cycle of present day cyclotrons is mainly due to: 1. r.f. extraction from the ion source; 2. r.f. defocusing caused by part of the r.f. phase; 3. loss of phase due to relativistic effects; 4. phase bunching at small radii; and 5. inefficient extractors. Possible methods of improvement are: 1. d.c. extraction from the ion source; 2.
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International Journal of Business Data Communications and Networking, 2016
Wireless Sensor Networks (WSNs) became omnipresent in our daily life. As a result, they have emerged as a fruitful research topic, because of their advantages, especially their low cost and easy deployment. However, these attractive merits imply that available resources, especially energy, in each sensor node have to be wisely used through different ...
Nassima Bouadem +2 more
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Wireless Sensor Networks (WSNs) became omnipresent in our daily life. As a result, they have emerged as a fruitful research topic, because of their advantages, especially their low cost and easy deployment. However, these attractive merits imply that available resources, especially energy, in each sensor node have to be wisely used through different ...
Nassima Bouadem +2 more
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Merging ultra-low duty cycle networks
2011 IEEE/IFIP 41st International Conference on Dependable Systems & Networks (DSN), 2011Energy is the scarcest resource in ad-hoc wireless networks, particularly in wireless sensor networks requiring a long lifetime. Intermittently switching the radio on and off is widely adopted as the most effective way to keep energy consumption low.
Matthew Dobson +2 more
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On the Measurement of Duty Cycle and Channel Occupancy Rate
IEEE Journal on Selected Areas in Communications, 2013Duty cycle (DC) and channel occupancy rate (COR) measurements are important to characterize the availability of white space for cognitive radio systems (CRSs). The COR is related to the real occupancy of channels considered by a CRS but despite its importance it has not yet been widely considered for spectrum use measurements. Spectrum use measurements
Janne J. Lehtomäki +2 more
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Distribution of Pulsar Duty Cycles
Nature, 1969WE define a pulsar duty cycle, in the usual way, as the ratio of pulse width to the period of repetition of the pulse (Table 1). On the basis of some extremely simple physical assumptions we compute a histogram for distribution of pulsar duty cycles, and the distribution fits the observations reasonably well as shown in Fig. 1.
G. R. HENRY, H.-J. PAIK
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2000
We shall again select the Valve controlled Cylinder System wel.dat, to illustrate the application of different types of input functions as outlined in chapter 32.5, ‘Time Domain’.
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We shall again select the Valve controlled Cylinder System wel.dat, to illustrate the application of different types of input functions as outlined in chapter 32.5, ‘Time Domain’.
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The Adaptive Cycle Engine on Standard Duty Cycles
SAE Technical Paper Series, 2019<div class="section abstract"><div class="htmlview paragraph">Continuing research introduced at the 2018 WCX conference, this paper shows the result of simulations where a midsize sedan (1700 kg) fitted with an adaptive cycle engine and a CVT is operated over three standard duty cycles: US06, UDDS, and HWFET, and compared with the results ...
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1∼99% Input Duty 50% Output Duty Cycle Corrector
2006 IEEE International Symposium on Circuits and Systems, 2006This work presents a high bandwidth and wide input duty range duty cycle corrector. A combined charge pump stabilizes the current/sink. A second order differential low-pass filter enhances the stability of the closed loop. A simplified low-voltage amplifier increases the input common-mode range.
Hong-Yi Huang +2 more
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Combating Aging with the Colt Duty Cycle Equalizer
2010 43rd Annual IEEE/ACM International Symposium on Microarchitecture, 2010Bias temperature instability, hot-carrier injection, and gate-oxide wear out will cause severe lifetime degradation in the performance and the reliability of future CMOS devices. The design guard band to counter these negative effects will be too expensive, largely due to the worst-case behavior induced by the uneven utilization of devices on the chip.
Erika Gunadi +3 more
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