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ASTM D6913/D6913M-17 - Standard Test Methods for Particle-Size Distribution (Gradation) of Soils Using Sieve Analysis
April 15, 2017 - ASTM International

5.1 The gradation of the soil is used for classification in accordance with Practice D2487. 5.2 The gradation (particle-size distribution) curve is used to calculate the coefficient of uniformity and the coefficient of curvature. 5.3 Selection and acceptance of fill materials are...

P2790/D4.0, Aug 2019 - IEEE Approved Draft Standard for Biometric Liveness Detection
2020 Edition, March 9, 2020 - IEEE - Institute of Electrical and Electronics Engineers, Inc.

A biometric lifeless attack is one of the indispensable issues within biometric authentication. There are three major components in liveness detection systems: lifeless attack presentation, liveness detection, and lifeless attack instruments. The lifeless attack presentation is divided into...

ASTM C1819-15 - Standard Test Method for Hoop Tensile Strength of Continuous Fiber-Reinforced Advanced Ceramic Composite Tubular Test Specimens at Ambient Temperature Using Elastomeric Inserts
August 1, 2015 - ASTM International

5.1 This test method (a.k.a., overhung tube method) may be used for material development, material comparison, material screening, material down selection and quality assurance. This test method is not recommended for material characterization, design data generation and/or material...

ASTM G166-00(2020) - Standard Guide for Statistical Analysis of Service Life Data
February 15, 2020 - ASTM International

1.1 This guide presents briefly some generally accepted methods of statistical analyses which are useful in the interpretation of service life data. It is intended to produce a common terminology as well as developing a common methodology and quantitative expressions relating to service life...

ASTM D624-00(2020) - Standard Test Method for Tear Strength of Conventional Vulcanized Rubber and Thermoplastic Elastomers
February 1, 2020 - ASTM International

1.1 This test method describes procedures for measuring a property of conventional vulcanized rubber and thermoplastic elastomers called tear strength. 1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This standard...

A Digital Constant Current Power LED Driver
Microchip Technology, Inc.

AN1138 A Digital Constant Current Power LED Driver drive current for this type of LED would be 350 mA and Author: Stephen Bowling a typical forward voltage would be 3.5V. Secondly, we Microchip Technology Inc. will assume that the circuit input voltage is 12V. The inductor value will...

ASTM C1375-00(2020) - Standard Guide for Substrates Used in Testing Building Seals and Sealants
January 1, 2020 - ASTM International

1.1 This guide describes the recommended standard substrates and their recommended surface preparation for use in standard tests of building seals and sealants. 1.2 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the...

ASTM D3443-00(2020) - Standard Test Method for Chloride in Trichlorotrifluoroethane
January 1, 2020 - ASTM International

3.1 This test method determines ionizable chloride that can be aqueously extracted from trichlorotrifluoroethane. 3.2 This test method can be used to establish production and purchasing specifications.

ASTM D3444-00(2020) - Standard Test Method for Total Acid Number of Trichlorotrifluoroethane
January 1, 2020 - ASTM International

3.1 This test method determines the total acidity of trichlorotrifluoroethane by titration with alcoholic potassium hydroxide using phenolphthalein for an indicator. 3.2 This test method can be used to develop production and purchasing specifications.

ASTM D4701-00(2020) - Standard Specification for Technical Grade Methylene Chloride
January 1, 2020 - ASTM International

1.1 This specification covers technical grade methylene chloride. 1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its...

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