منابع مشابه
David L
Recent evidence suggests that nearly 25% of U.S. adults (47 million) suffer from some level of sleep deprivation. The impact of this sleep deprivation on the U.S. economy includes direct medical expenses related to sleep deprivation and related disorders, the cost of accidents, and the cost of reduced worker productivity. Sleep research has examined the effects of sleep deprivation on a number ...
متن کاملand David L . Parnas
The software industry has existed since the mid-1950s, but until about 1970 very little attention was paid to it, largely because the industry was too small to merit detailed analysis other than as an unquantified sector of the overall computer business. As late as 1970, the annual turnover of all U.S. software firms was less than $1/2 billion – about 3.7 percent per cent of the total computer ...
متن کاملDavid L. Glanzman
that the paying customers make a contribution to the conservation of the species. A recent research paper shows, however, that the process has not led to any successful re-integration of lions into the wild, because captivebred lions and their offspring are ill-suited for survival compared with their wild-born peers (Oryx (2012) doi:10.1017/S0030605312000695). “The simple fact is, ‘lion encount...
متن کاملDavid L Waltz, in Memoriam
tion after completing his dissertation in 1972 at the Massachusetts Institute of Technology Artificial Intelligence Laboratory (MIT AI Lab). That dissertation created the field of constraint propagation by showing that constraints and a rich but simple descriptive system were sufficient to recover threedimensional information from a two-dimensional projection. Besides an education, Dave picked ...
متن کاملGenetic Study of Agronomic Traits in Tobacco (Nicotiana tabacum L.) Using Hayman’s Graphical Analysis of Diallel
For the purpose of graphical analysis and estimation of genetic parameters related to yield and its components, six tobacco genotypes was crossed in half -diallel mating design. In this study, the F2 progenies and their parents were evaluated in a randomized complete block design with three replications. The results of analysis of variance indicated a significant difference between genotypes fo...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Chemical Education
سال: 1988
ISSN: 0021-9584,1938-1328
DOI: 10.1021/ed065pa269