منابع مشابه
The Improved Adaptive Silence Period Algorithm over Time-Variant Channels in the Cognitive Radio System
In the field of cognitive radio spectrum sensing, the adaptive silence period management mechanism (ASPM) has improved the problem of the low time-resource utilization rate of the traditional silence period management mechanism (TSPM). However, in the case of the low signal-to-noise ratio (SNR), the ASPM algorithm will increase the probability of missed detection for the primary user (PU). Focu...
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Amani was a 24-year-old woman in her second year of nursing school in Jerusalem. She lived with her extended family, including her parents, grandparents, and six older brothers, who had emigrated from Syria more than 10 years earlier. They are religious Muslim Arabs who lived in an Arab village not far from our cancer center in Jerusalem. For more than a year, Amani had experienced symptoms of ...
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" Like all good memoirs it has not been emasculated by considerations of good taste. " That was Peter Medawar's verdict on The Double Helix, Jim Watson's ebullient succès de scandale. Watson's exuberant style, let it be said right away, is not Maurice Wilkins's. He and Francis Crick were outraged by Watson's account — now a modern classic, at number seven in the American Modern Library's roll o...
متن کاملChromatin: A sticky silence
Recent findings indicate that heterochromatin serves as a molecular sink for factors involved in chromatin-mediated repression of gene expression; long-range interactions that position a euchromatic gene near a heterochromatin domain influence its susceptibility to transcriptional silencing.
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The large genomes of higher eukaryotes suggest a need for stable packaging, particularly as most of the DNA does not code for proteins, and much consists of repetitious sequences, including remnants of invading retrotransposons, transposable elements and the like. Cytological studies first demonstrated that much of the repetitous DNA is packaged in a condensed form referred to as heterochromati...
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ژورنال
عنوان ژورنال: Index on Censorship
سال: 2010
ISSN: 0306-4220,1746-6067
DOI: 10.1177/0306422010371893