Results 221 to 230 of about 973,387 (301)
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Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression, 2002
In this review, we describe a variety of mechanisms that bacteria use to regulate transcription elongation in order to control gene expression in response to changes in their environment. Together, these mechanisms are known as attenuation and antitermination, and both involve controlling the formation of a transcription terminator structure in the RNA
Paul, Gollnick, Paul, Babitzke
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In this review, we describe a variety of mechanisms that bacteria use to regulate transcription elongation in order to control gene expression in response to changes in their environment. Together, these mechanisms are known as attenuation and antitermination, and both involve controlling the formation of a transcription terminator structure in the RNA
Paul, Gollnick, Paul, Babitzke
openaire +2 more sources
A 37–40-GHz Low-Phase-Imbalance CMOS Attenuator With Tail-Capacitor Compensation Technique
IEEE Transactions on Circuits and Systems Part 1: Regular Papers, 2020A Ka-band 5-bit CMOS digital step attenuator (DSA) with low phase variations for 5G applications is presented. The attenuator cell is optimized to alleviate the phase variations of conventional switched attenuators.
Chenxi Zhao +6 more
semanticscholar +1 more source
A Tunable Graphene Filtering Attenuator Based on Effective Spoof Surface Plasmon Polariton Waveguide
IEEE transactions on microwave theory and techniques, 2020In this article, to reduce the operating frequency and the size of the spoof surface plasmon polariton (SSPP) attenuator and introduce the filtering function into the graphene attenuator, we propose a tunable graphene filtering attenuator, namely the ...
Yang Yi, An-Qi Zhang
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Intelligent Memory Systems, 2020
This paper reports a novel millimeter-wave (mmWave) reconfigurable phase change material (PCM) germanium telluride (GeTe) based 4-bit latching variable attenuator.
Tejinder Singh, R. Mansour
semanticscholar +1 more source
This paper reports a novel millimeter-wave (mmWave) reconfigurable phase change material (PCM) germanium telluride (GeTe) based 4-bit latching variable attenuator.
Tejinder Singh, R. Mansour
semanticscholar +1 more source
Hearing protector attenuation: Models of attenuation distributions
The Journal of the Acoustical Society of America, 2002Current hearing protector rating standards estimate the protection performance for a given frequency as the mean attenuation minus a multiple of the standard deviation. Distributions of real-ear attenuation at threshold data are fit with maximum likelihood estimation procedures using both normal and mixed-normal models.
William J, Murphy +2 more
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Commercial graphene nanoplatelets‐based tunable attenuator
, 2020A commercial graphene nanoplatelets-based tunable attenuator is proposed. The attenuator comprises of a couple of microstrip lines connected through a gap where the commercial graphene nanoplatelets are drop casted.
M. Yasir, P. Savi
semanticscholar +1 more source
IEEE Transactions on Circuits and Systems - II - Express Briefs
In this brief, a direct synthesis design method of a continuously tunable wideband bandpass filtering attenuator is proposed. By adjusting the adjustable resistors, the attenuation amount that is inversely proportional to its resistance value can be ...
Pin Wen +4 more
semanticscholar +1 more source
In this brief, a direct synthesis design method of a continuously tunable wideband bandpass filtering attenuator is proposed. By adjusting the adjustable resistors, the attenuation amount that is inversely proportional to its resistance value can be ...
Pin Wen +4 more
semanticscholar +1 more source
Voltage-Controlled Tunable Filtering Attenuator Using PIN Diodes
IEEE Transactions on Circuits and Systems - II - Express BriefsIn this brief, a voltage-controlled tunable filtering attenuator using PIN diodes is proposed. A coupled-line structure loaded by PIN diodes is utilized to realize the integration of filtering and attenuation.
Weiyu He +4 more
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Graphene-based dynamically tunable attenuator on a half-mode substrate integrated waveguide
Applied Physics Letters, 2018An-Qi Zhang, Zhenguo Liu, Wei-Bing Lu
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Tunable Grounded Coplanar Waveguide Attenuator Based on Graphene Nanoplates
IEEE Microwave and Wireless Components Letters, 2019In this letter, a novel tunable grounded coplanar waveguide (GCPW) attenuator based on graphene nanoplates is proposed. The attenuator consists of a 50- $\Omega $ GCPW transmission line and three pairs of graphene nanoplate pads periodically located in ...
Bian Wu +4 more
semanticscholar +1 more source