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X-ray diffraction computed tomography is an experimental technique that combines X-ray diffraction with the computed tomography data acquisition approach. X-ray diffraction (XRD) computed tomography (CT) was first introduced in 1987 by Harding et al. [ 1 ] using a laboratory diffractometer and a monochromatic X-ray pencil beam .
1937 stamps of South Africa. The first stamp of the Union of South Africa was a 2 1 ⁄ 2 d stamp issued on 4 November 1910. [2] [3] It portrayed the Monarch King George V and the arms of the four British colonies which formed the Union: Cape Colony, Natal, Orange River Colony and Transvaal. Most South African stamps issued between 1926 and ...
[1] 1937 1½p stamp. Stamps issued by the Union of South Africa were used from 1914 until 1953. The first stamps inscribed "South West Africa" were issued bilingually in English and Afrikaans (Suidwes Afrika) on 1 January 1923. From 1970, the abbreviation "SWA" was in general use. [2] However, some postmarks featured German as well as Afrikaans ...
A regular array of scatterers produces a regular array of spherical waves. Although these waves cancel one another out in most directions through destructive interference, they add constructively in a few specific directions. [21] [22] [23] An intuitive understanding of X-ray diffraction can be obtained from the Bragg model of diffraction. In ...
X-ray diffraction (XRD) is still the most used method for structural analysis of chemical compounds. Yet, with increasing detail on the relation of K β {\displaystyle K_{\beta }} -line spectra and the surrounding chemical environment of the ionized metal atom, measurements of the so-called valence-to-core (V2C) energy region become ...
In the most recent fiscal year, we had about 204,000 people receive about $1.67 billion in benefits which counts for 61 million leave hours," said Eldridge. By fiscal year 2027, Eldridge said they ...
These were replaced by South African penalty stamps later that year. Around 1940, a design featuring the South African coat of arms was issued to pay entertainment tax on theatre on concert tickets. This was replaced by a numeral design around 1950. A Furniture Workers stamp was also issued around 1940. [2]
Marcel Reed threw two touchdown passes and ran for a third score in less than three quarters to help No. 15 Texas A&M cruise to a 38-3 win over New Mexico State on Saturday night. It was a bounce ...