Results 251 to 260 of about 3,048,399 (301)
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Influence of contact tracing on sex ratios in gonorrhoea
Public Health, 1975The effect of contact tracing in reducing the sex ratio for cases of gonorrhoea has been considered using data provided annually by the Department of Health. A 10-year period was considered. By further classification of the figures into those cases that came directly to the clinics and those that were seen as a result of contact racing, the direct case
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Contacts on high aspect ratio 3D structures
Microelectronic Engineering, 2011We present a novel way for depositing material on the top surface of three-dimensional (3D) structures. This process supplies the possibility of applying a wide range of materials on the top of structures which are too high to be processed with conventional techniques. A planarization process or vertical sidewalls of the structures are not necessary.
R. Neumann +5 more
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Contact Ratio: A New Precise Measurement for Wettability
The Canadian Journal of Chemical Engineering, 2008According 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 +1 more
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Measurements of Injection Ratio of Point Contacts on Germanium
Proceedings of the Physical Society. Section B, 1955Measurements are reported of injection ratio γ on various specimens of n-type germanium. γ was found to be insensitive to the nature of the contact material, to the contact thrust, and to the carrier concentration of the germanium over the limited range investigated.
P C Banbury, J Houghton
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Contact Problem for Inhomogeneous Cylinders with Variable Poisson’s Ratio
Mechanics of Solids, 2019zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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Contact Ratio, Interference and Backlash
1987The meshing cycle of a tooth pair begins when the teeth first make contact, and ends when the contact is broken. If one gear is to drive the other in a continuous manner, there must clearly be at least one tooth pair in contact at all times. However, it is found that smooth operation is only possible when the contact at one tooth pair continues until ...
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The AC/A Ratio and Convergence in Hypermetropia Corrected with Spectacles or Contact Lenses
American journal of optometry and physiological optic, 1982Abstract Some hypermetropes, when corrected with contact lenses, appear to have a much smaller AC/A ratio than when corrected with spectacle lenses. Ocular convergence measured with contact lenses is greater than that measured with spectacles. Studies were carried out to establish the cause of these effects. Theoretical considerations
A. Colasanti +3 more
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Contact Ratio of Spatial Helix Gearing Mechanism
Volume 3: Design, Materials and Manufacturing, Parts A, B, and C, 2012The 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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Direct Method of Measuring the Contact Injection Ratio
Review of Scientific Instruments, 1956A 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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Modifying the Lambda Ratio to Functional Line Contacts
Tribology Transactions, 1990Lambda 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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