Counting Birds
نویسندگان
چکیده
منابع مشابه
Counting the Fingers of Birds and Dinosaurs
Homologies of the three fingers in birds have been debated for more than a century. Paleontologists have traditionally identified avian digits as I-II-III largely on the basis of phalangeal counts, whereas embryologists number them II-III-IV on the basis of development in the egg. The report by Ann C. Burke and Alan Feduccia (1) is a synthesis of the embryological evidence. They observe that in...
متن کاملCounting birds in India: Methodologies and trends
Counting is central to ecological studies and conservation research in ornithology. This article examines the present status of counting birds for various purposes in India. Though there is general awareness about proper counting techniques, as evidenced by the variety of methods employed by field biologists, reliability estimates are not available for most studies. Counts that employ large set...
متن کاملOn Counting Polynomials of Some Nanostructures
The Omega polynomial(x) was recently proposed by Diudea, based on the length of strips in given graph G. The Sadhana polynomial has been defined to evaluate the Sadhana index of a molecular graph. The PI polynomial is another molecular descriptor. In this paper we compute these three polynomials for some infinite classes of nanostructures.
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Cause Chlamydiosis refers to an infection with organisms of the genus Chlamydia sp., which are bacteria that live within animal cells. Chlamydia psittaci is the species generally associated with this disease in birds. The severity of the disease differs by the strain of C. psittaci and the susceptibility of different species of birds. As a result, chlamydiosis may range from an inapparent infec...
متن کاملCurve Counting and Instanton Counting
Intuitively, in four-dimensional gauge theories one counts instantons, and in twodimensional string theory one counts holomorphic curves. These correspond to the instanton counting and curve counting in the title. There is no obvious connection between them, but a remarkable physical idea called geometric engineering [9, 10, 11] dictates that they are indeed related. More precisely, the generat...
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ژورنال
عنوان ژورنال: Blue Jay
سال: 1957
ISSN: 2562-5667,0006-5099
DOI: 10.29173/bluejay2102