Results 261 to 270 of about 1,013,107 (304)

Direct Method of Measuring the Contact Injection Ratio

Review of Scientific Instruments, 1956
A direct method of measuring the injection ratio of rectifying contacts is described. With this method, the injection ratio is determined by comparing the area of a current injection pulse with the area of the resulting hole storage pulse as observed on an oscilloscope screen.
Orlie L. Curtis, B. R. Gossick
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Contact Problem for Inhomogeneous Cylinders with Variable Poisson’s Ratio

Mechanics of Solids, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Contact Ratio: A New Precise Measurement for Wettability

The Canadian Journal of Chemical Engineering, 2008
According to Young's equation, the contact angle "θ" is considered as the measurable wettability parameter. The rate of change in the contact angle has been commonly used as the relevant parameter of spreading dynamics notwithstanding the difficulties associated with contact angle measurements that are well recognized in the literature.
Abdullatif M. Alteraifi, Abdel Hafiz Hirbawi   +1 more
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Contact Ratio of Spatial Helix Gearing Mechanism

Volume 3: Design, Materials and Manufacturing, Parts A, B, and C, 2012
The contact ratio of spatial helix gear is deduced, and impacting factors of the contact ratio are analyzed. Then different design methods of contact ratio are discussed. The contact ratio could be designed flexibly. The theoretical gear ratio could be expanded to 36 with compact structure.
Y.-Z. Chen, Z. Chen, Y. Zhang
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The effect of the gear wear for the contact ratio

2019
The contact ratio is such a parameter of a gear, that is very important because of the noise of the drive and the quality of the mesh. In general condition, the contact ratio can be considered constant during the whole lifetime. Although there are applications where the gears are working without any lubrication and the only criteria of the lifetime ...
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Modifying the Lambda Ratio to Functional Line Contacts

Tribology Transactions, 1990
Lambda ratio, the lubricant film thickness divided by the composite roughness within an operating rolling element bearing, has been recognized for more than 25 years as an important contact parameter related to bearing performance, primarily fatigue life.
C. A. Moyer, L. L. Bahney
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A simple electrical contact for resistivity ratio measurements

Journal of Physics E: Scientific Instruments, 1971
A mechanical device for making low-pressure, non-solderable electrical contact to irregular specimens is described and its advantages in use are outlined.
I A Bucklow, J H Potter
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Study on contact distortion during high aspect ratio contact SiO2 etching

Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, 2014
As pattern density is increased in semiconductor integrated circuits (ICs) and pattern sizes are decreased to nanometer scale, high aspect ratio contact etching has become one of the most difficult processes in nanoscale IC fabrication. The increase in aspect ratio of the contact oxide etching raises problems such as low mask selectivity, microloading,
Jong Kyu Kim, Sung Ho Lee, Sung Il Cho, Geun Young Yeom   +3 more
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Basic Speed Ratio of an Angular Contact Bearing

Journal of Lubrication Technology, 1980
A characteristic number, the basic speed ratio for an angular contact ball bearing, is defined and shown to be 1) accurately measurable; and 2) dependent on ball-race coupling. Some measurements of basic speed ratio are discussed in terms of kinematic equivalence, and compared with predictions obtained from a computer simulation.
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Contact of Elastic Bodies with Negative Poisson’s Ratio

2003
A class of large deformation contact problems for linear elastic, isotropic bodies exhibiting negative Poisson’s ratio will be considered, Bilateral as well as unilateral contact with friction is analyzed. Essential differences in deformation as well in stress distribution in comparison with conventional materials have been corroborated.
G. Szefer, D. Kedzior
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