منابع مشابه
On triangulation axes of polygons
We propose the triangulation axis as an alternative skeletal structure for a simple polygon P . This axis is a straight-line tree that can be interpreted as an anisotropic medial axis of P , where inscribed disks are line segments or triangles. The underlying triangulation that specifies the anisotropy can be varied, to adapt the axis so as to reflect predominant geometrical and topological fea...
متن کاملThe two earths of Eratosthenes.
In the third century B.C.E., Eratosthenes of Cyrene made a famous measurement of the circumference of the Earth. This was not the first such measurement, but it is the earliest for which significant details are preserved. Cleomedes gives a short account of Eratosthenes' method, his numerical assumptions, and the final result of 250,000 stades. However, many ancient sources attribute to Eratosth...
متن کاملChallenges in the Area of Training and Prevention at the HIV Triangulation Clinic, Kerman, Iran
Background: Since 2000, Iran has been delivering training and treatment services, including methadone therapy, to HIV positive patients through triangular clinics. This study aims to evaluate the effectiveness of these activities at the HIV Triangulation Centre in the city of Kerman, Iran, through clients’ views. Methods: Participants were recruited using a convenience sample and assessed throu...
متن کاملthe relationship between learners critical thinking ability and their performance in the reading sections of the tofel and ielts test
the study reflected in this thesis aims at finding out relationships between critical thinking (ct), and the reading sections of tofel and ielts tests. the study tries to find any relationships between the ct ability of students and their performance on reading tests of tofel and academic ielts. however, no research has ever been conducted to investigate the relationship between ct and the read...
15 صفحه اولThe resistivity of liquid rare earths
The resistivities of various liquid rare earths were calculated in a single-site t-matrix approximation. Good agreement with experiment is achieved. Spin disorder scattering is shown to be unimportant in the liquid state. The experimental resistivity data of liquid rare earths (RE) shows the following behavior [l, 21 : The resistivity p increases across the series of the trivalent RE's. The tem...
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ژورنال
عنوان ژورنال: Nature
سال: 1919
ISSN: 0028-0836,1476-4687
DOI: 10.1038/103381a0