Do varieties wear out, or tend to wear out?
نویسندگان
چکیده
منابع مشابه
Why do we grow old: is it because our cells just wear out, we run out of cells (or both), and what can we do about it?
Longevity & Healthspan, a new BioMed Central journal, has launched a thematic series on cellular senescence and aging, a quickly evolving field critical to our understanding of the biology of aging.
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Failure models based on the Palmgren-Miner concept that material darnage is cumulative have been derived and used mainly for fatigue life predictions for metals and composite materials. Wexeview the principles underlying such models and suggest ways in which they may be best applied to polymeric materials in temperature environments. We first outline expectations when polymer degradation data c...
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Early failure rates have increased due to reduced feature dimensions and electromigration wear-out. Periodic delay measurements can be employed to estimate the state of wear-out. Including delay measurement sensors on-chip is costly. Therefore, a method is proposed to reduce the number of measurement points. The method identifies wear-out sensitive interconnects and selects a small number of me...
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The aggressive scaling of nanometer CMOS technology nodes and the integration of low-k dielectrics introduces novel reliability phenomena that progressively degrade the electrical characteristics of copper interconnects. These effects impact the performance of designs gradually rather than abruptly, leading to timing violations in several timing-critical paths and thus shortening the system’s l...
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OBJECTIVES To assess the public's knowledge and attitudes to antibiotics, their reported antibiotic use and the relationship between them. PATIENTS AND METHODS A questionnaire was included in the face-to-face Office for National Statistics Omnibus Household Survey in Britain in 2003. Of 10 981 randomly selected adults from England, Scotland and Wales, 7120 (65%) completed the questionnaire. ...
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ژورنال
عنوان ژورنال: American Journal of Science
سال: 1875
ISSN: 0002-9599
DOI: 10.2475/ajs.s3-9.50.109