منابع مشابه
Mathematical Problems in Operations Research
During the past war a new field of application of the scientific method was developed, called operations research, or operational analysis. A number of mathematicians contributed to this development and some of their work should be of general interest to mathematicians, though reasons of military security have precluded publication of much of it. I t is my intention to discuss a number of probl...
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This paper is concerned with real-time decision problems. These constitute a generic class of dynamic and stochastic problems. The objective is to provide responses of a required quality in a continuously evolving environment, within a prescribed time frame, using limited resources and information that is often incomplete or uncertain. Furthermore, the outcome of any particular decision may als...
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Beginning in the 1940s, a wave of health innovations and more effective international public health measures led to a rapid and large improvement in health; for example, in some relatively poor countries, life expectancy at birth quickly rose from around 40 years to over 60 years. In Acemoglu and Johnson ð2006, 2007Þ, we constructed an instrument for these changes in life expectancy: “predicted...
متن کاملHeat penetration and thermocouple location in home canning
We processed applesauce, tomato juice, and cranberries in pint jars in a boiling water canner to test thermal processing theories against home canning of high-acid foods. For each product, thermocouples were placed at various heights in the jar. Values for f h (heating), f cl (cooling), and F 82.2°C (lethality) were determined for each thermocouple location, and did not depend substantially on ...
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ژورنال
عنوان ژورنال: American Journal of Public Health
سال: 1918
ISSN: 0271-4353
DOI: 10.2105/ajph.8.3.212