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EAN-139780945001171   EAN-13 barcode 9780945001171
Product NameThe Chemistry Of Powder And Explosives
LanguageEnglish
CategoryBook / Magazine / Publication
Amazon.comA Buy on Amazon ~ 0913022004
SKU2054504
Price New25.32 US Dollars    (curriencies)
Price Used19.96 US Dollars    (curriencies)
Width5.75 inches    (convert)
Height8.75 inches    (convert)
Length1.5 inches    (convert)
Weight27.2 ounces    (convert)
AuthorTenney L. Davis
Page Count511
BindingHardcover
Published02/15/2012
FeaturesUsed Book in Good Condition
Long DescriptionThe present volume contains in one binding the whole contents of Volume I, first published in May, 1941, and the whole contents of Volume II which was published in March, 1943. The book was primarily for chemists. The writing of it was commenced in order that a textbook might be available for the use of students in the course in powder and explosives which the author gave for about twenty years (nearly every year since the first World War) to fourth-year and graduate students of chemistry and of chemical engineering at the Massachusetts Institute of Technology.... The aim of the book has been too described as clearly and interestingly as possible and as fully as seemed profitable the modes of behavior, both physical and chemical, of explosive substances, whether these modes find practical application or not. Historical material has been included where it was thought that it contributed to this end, and has not been included elsewhere or for any other reason. It is a fact that a knowledge of the history of ideas, of persons, or of things produces something of the same sympathetic understanding of them that living with them and working with them does. --- excerpts from book's Preface
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Created11-22-2012 4:43:10am
Modified09-24-2017 7:23:25pm
MD5fcff8bf59cade60178952c90a61842a5
SHA2566f20e26009685c75ff01d160461d3f9c6db223f35b92fa4a776160a038c8a5f4
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Code 128 is a high-density 1D barcode symbology. This barcode set makes use of the entire 128 ASCII characters which include letter, number and symbols.

Code 128 Barcode

As with all barcodes, there are indicators to identify where the barcode starts and stops. These are marked in yellow below. Code 128 also has a check character which has been marked in green. The remainder of the barcode is the data being encoded. The text below the barcode is optional and is for human consumption in the event the barcode can't be scanned or if people also need to know what the code means.

Code 128 Barcode

Each character in the barcode symbol is composed of three bars and three spaces. Each bar or space must range from 1-4 units and the sum of all the width of all bars must work out to an even number. The stop marker is special because it adds an extra bar of 2 units at the very end (4 bars and 3 spaces). There are three different start markers to to identify which code set is being used. To represent all 128 characters, the code sets can be within a single barcode as needed by using control characters 98-101 (depending on the code set).

The check character is calculated by summing the value of each character and multiplying it by its position. The start character is also part of the sum but is added without weight (multiply by 1 just like the first encoded data character) then when you have the sum take the modulo 103 remainder. This gets a little more complex when mixing modes within a single barcode.

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