منابع مشابه
Trees that Grow
We study the notion of extensibility in functional data types, as a new approach to the problem of decorating abstract syntax trees with additional information. We observed the need for such extensibility while redesigning the data types representing Haskell abstract syntax inside Glasgow Haskell Compiler (GHC). Specifically, we describe a programming idiom that exploits type-level functions to...
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Chemotactic bacteria have been observed to congregate into highly regular patterns. When the bacteria are placed in the center of a dish, a wave of bacteria can travel outward, leaving a regular pattern of spots or stripes in its wake. Although chemotaxis and excretion of an attractant can readily cause a pattern forming instability from a uniform state, they are not capable of generating patte...
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density ( fig. 1 ). Pull test was positive on the whole scalp. His eyelashes, eyebrows and body hairs were normal in length and pattern. The rest of the physical examination was normal, without any abnormalities of skin, teeth or nails. A trichogram from the parietal region showed a decreased anagen to telogen ratio of 22/78 (against 90/10 in normal condition) with all hair presenting tapered t...
متن کاملExpansions That Grow on Trees
1 Linear ordinary diierential equations How to solve linear ordinary diierential equations? Like many outstanding mysteries of mathematics, this question has the virtue of simplicity. Linear differential equations are the staple of every mathematical syllabus, familiar to all and sundry, and their investigation has informed much of the development of mathematical analysis in the last three hund...
متن کاملPatterns that Grow ( in a dish )
Chemotactic bacteria have been observed to congregate into highly regular patterns. When the bacteria are placed in the center of a dish, a wave of bacteria can travel outward, leaving a regular pattern of spots or stripes in its wake. Although chemotaxis and excretion of an attractant can readily cause a pattern forming instability from a uniform state, they are not capable of generating patte...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Earth Surface
سال: 2018
ISSN: 2169-9003,2169-9011
DOI: 10.1029/2018jf004706