منابع مشابه
Growing degree-days: one equation, two interpretations
Heat units, expressed in growing degree-days (GDD), are frequently used to describe the timing of biological processes. The basic equation used is GDD = [(T,,, + TM,,)/2] T,,,,, where T, and T,,, are daily maximum and minimum air temperature, respectively, and T,, is the base temperature. Two methods of interpreting this equation for calculating GDD are: (1) if the daily mean temperature is les...
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We introduce techniques that allow us to embed below an arbitary nonlow2 recursively enumerable degree any lattice currently known to be embedable into the recursively enumerable degrees.
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We show that the theory of D(6 g), where g is a 2-generic or a 1-generic degree below 0′, interprets true first order arithmetic. To this end we show that 1-genericity is sufficient to find the parameters needed to code a set of degrees using Slaman and Woodin’s method of coding in Turing degrees. We also prove that any recursive lattice can be embedded below a 1-generic degree preserving top a...
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One of the key principles in rangeland management is determination of suitable times for exploitation and grazing of rangeland plants in summer and winter pasturelands. This determination of time not only prevents degradation of plant species, but also leads to optimal usage of plant yield. Multiple factors affect plant phenology among which temperature regime has the highest effect on plant de...
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ژورنال
عنوان ژورنال: Monthly Weather Review
سال: 1954
ISSN: 0027-0644,1520-0493
DOI: 10.1175/1520-0493(1954)082<0111:nddbab>2.0.co;2