Three-Symbol Code

2013 ◽  
pp. 2170-2170
Keyword(s):  
1979 ◽  
Vol 23 (1) ◽  
pp. 92-96 ◽  
Author(s):  
M. Lisa Baumgarten ◽  
Stephan Konz

The US Post Office is scheduled to adopt a 9 digit zip code. Seven alternative designs were evaluated for ease of copying and preference. The seven types were unbroken 9 (352641091), 5-3-1 (35264 109 1), 5-4 (35264 1091), 5-A3 (35264 A091), 5A3 (35264A091), 3-3-3 (352 641 091) and 3-2-4 (352 64 1091). The 138 subjects copied 1880 codes/type. The error rate varied from 1.0% for 3-3-3 to 2.5% for the two codes with letters. The 3-3-3 also was most preferred. For a 9 symbol code we recommend it be all numeric. The recommended grouping is 3-3-3. If the present 5 digits are to be retained unbroken, the new code should be 5-4; that is, the present code, a space, and a new string of 4 digits.


1994 ◽  
Vol 9 (4) ◽  
pp. 239-245 ◽  
Author(s):  
P. L. Wallace ◽  
S. Weissmanna ◽  
M. H. Mueller ◽  
L. D. Calveit ◽  
R. Jenkins

The Metals and Alloys Indexes, published by the International Centre for Diffraction Data, contain four indexes. These are: (a) the alphabetical formula index (AFI); (b) the Pearson symbol code index; (c) the common name index; and (d) the Strukturbericht symbol index. These indexes (which contain metals, alloys, and related phases in the Powder Diffraction File) have been designed to be used independently or in conjunction with the Powder Diffraction File to facilitate the characterization of materials. All data in these indexes have been critically reviewed. The organization, selection of materials, and use of alphabetical formulas are similar to those of standard metallurgical references such as Pearson or Villars and Calvert. The arrangement of the AFI promotes systematic searches for chemical analogs and assists users in locating possible matches when only partial chemical information is available. The structural indexes aid in characterization by correlations to prototype and related structures. Some applications of the indexes are given here.


1959 ◽  
Vol 1 (3) ◽  
pp. 218-220 ◽  
Author(s):  
Robert L. Sinsheimer
Keyword(s):  

2012 ◽  
Vol 2 (3) ◽  
pp. 27-60
Author(s):  
Galina N. VOROBEVA ◽  
Victor M. VOROBEV

Considering the problems faced by learners of Japanese from non-kanji background, the present paper discusses the characteristics of 15 existing kanji dictionary indexes. In order to compare the relative efficiency of these indexes, the concept of selectivity is defined, and the selectivity coefficient of the kanji indexes is computed and compared. Furthermore, new indexes developed by the present authors and based on an alphabetical code, a symbol code, a semantic code, and a radical and stroke number code are presented and their use and efficiency are explained.


2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Sébastien Moureau ◽  
Godefroid de Callataÿ

Abstract In the medieval Arabic tradition of the so-called occult sciences, the concept of ramz (symbol, code) has acquired an important role in the way the authors were considering and reading the texts of their predecessors and writing their owns. This term, closely related to the notion of secret, covered various ideas of code: from allegories and allusions to codenames and secret alphabets. Above all, the alchemists made ramz a real topos of their literature. In this paper, we focus on the Rutbat al-ḥakīm of Maslama b. Qāsim al-Qurṭubī (written in 339–342/950–953) and some of its main sources, such as the corpus of texts attributed to Jābir b. Ḥayyān, Ibn Waḥshiyya’s Filāḥa Nabaṭiyya, the Rasā’il Ikhwān al-Ṣafāʾ and the Risāla Jāmiʿa. We argue that Maslama produced a detailed definition of ramz, conceived a true typology of it, and proposed his own key to reading the alchemical ramz. This rich development is not found in any of the other texts that we have examined here. This observation confirms that Maslama b. Qāsim al-Qurṭubī, far from being a simple transmitter of Eastern ideas and practices to the Western Arab-Muslim world, was an original and innovative milestone in the transfer of knowledge.


2000 ◽  
Vol 15 (4) ◽  
pp. 217-217
Author(s):  
Peter Bayliss

More isostructural compounds would have the same Pearson Symbol Code (PSC) if the hydrogen atom is not counted in computing the numeric portion of the PSC.


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