On the Flying Height Determination of Film-Coated Magnetic Heads

1995 ◽  
pp. 55-67 ◽  
Author(s):  
Yufeng Li ◽  
Aric Kumaran Menon
Keyword(s):  
Flying Height ◽  
Height Determination

Evaluations of Diamond-Like-Carbon Film Optical Constants and Their Effects on Flying Height Determination

1996 ◽  
Vol 118 (4) ◽  
pp. 767-773 ◽  
Author(s):  
Yufeng Li ◽  
Aric Menon ◽  
Peter Goglia
Keyword(s):  
Optical Properties ◽  
Measurement Errors ◽  
Optical Constants ◽  
Carbon Film ◽  
Index Of Refraction ◽  
Least Square ◽  
Flying Height ◽  
Height Measurement ◽  
Height Determination

The accuracy in flying height determination of a film coated magnetic slider relies on the availability of accurate optical property values of each film. In view of this, the index of refraction and coefficient of extinction of carbon and underlayer films, as used on a magnetic slider, was evaluated in this study. Various thicknesses of carbon and underlayer films were coated on Al2O3-TiC substrates, and their optical properties were determined by using a variable angle spectroscopic ellipsometer at multiple angles of incidence and two optical models via reasonable range and least square methods. Then the effects of the carbon and underlayer films on flying height measurement were assessed. It was found that the optical properties of the underlayer film are strongly thickness and wavelength dependent. Therefore, the flying height measurement errors caused by incorrect treatment of the films are functions of film thickness and light wavelength.

scholarly journals Determination of Conversion Constant between Lagos Datum and Niger Delta Mean Lower Low Water Datum and their Horizontal and Vertical Accuracy Standards using GNSS Observations

2018 ◽  
Vol 2 (1) ◽  
pp. 56-68
Author(s):  
M. O. Ehigiator ◽  
S. O. Oladosu
Keyword(s):  
Niger Delta ◽  
Satellite System ◽  
Constant Factor ◽  
Common Mean ◽  
Height Determination ◽  
The Mean ◽  
Vertical Accuracy ◽  
Global Navigation Satellite ◽  
Gnss Observations

With the use of Global Navigation Satellite System (GNSS) technology, it is now possible to determine the position of points in 3D coordinates systems. Lagos datum is the most common Mean Sea Level used in most parts of Nigeria. In Niger Delta, for instance Warri and its environs, the most commonly used datum for height determination is the Mean Lower Low Water Datum. It then becomes necessary to determine a constant factor for conversion between the two datum when the need arises as both are often encountered during Geomatics Engineering field operations. In this paper, the constant to be applied in converting between both datum was determined. The constant was found to be 17.79m. The horizontal and vertical accuracy standard was also determined as well as the stack maps.

Adsorption height determination of nonequivalent C and O species of PTCDA on Ag(110) using x-ray standing waves

2013 ◽  
Vol 87 (4) ◽  
Author(s):  
G. Mercurio ◽  
O. Bauer ◽  
M. Willenbockel ◽  
N. Fairley ◽  
W. Reckien ◽  
...  
Keyword(s):  
Standing Waves ◽  
X Ray ◽  
Height Determination

Progress in technology for the 2005 height determination of Qomolangma Feng (Mt. Everest)

2006 ◽  
Vol 49 (5) ◽  
pp. 531-538 ◽  
Author(s):  
Junyong Chen ◽  
Janli Yuan ◽  
Chunxi Guo ◽  
Yanping Zhang ◽  
Peng Zhang
Keyword(s):  
Height Determination

.gamma.-Pulse height determination of plutonium-238 in solid wastes

1969 ◽  
Vol 41 (2) ◽  
pp. 384-388 ◽  
Author(s):  
Emie A. Mershad ◽  
Mary Lou. Curtis ◽  
J. Y. Jarvis ◽  
W. R. Amos
Keyword(s):  
Pulse Height ◽  
Solid Wastes ◽  
Height Determination
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