NIMBUS 7 Earth Radiation Budget (ERB) Matrix User's Guide. Volume 2: Tape Specifications

The ERB MATRIX tape is generated by an IBM 3081 computer program and is a 9 track, 1600 BPI tape. The gross format of the tape given on Page 1, shows an initial standard header file followed by data files. The standard header file contains two standard header records. A trailing documentation file (TDF) is the last file on the tape. Pages 9 through 17 describe, in detail, the standard header file and the TDF. The data files contain data for 37 different ERB parameters. Each file has data based on either a daily, 6 day cyclic, or monthly time interval. There are three types of physical records in the data files; namely, the world grid physical record, the documentation mercator/polar map projection physical record, and the monthly calibration physical record. The manner in which the data for the 37 ERB parameters are stored in the physical records comprising the data files, is given in the gross format section

Quantitative Analysis of Hydrogenated DLC Films by Visible Raman Spectroscopy

The correlations between properties of hydrogenated diamond like carbon films and their Raman spectra have been investigated. The films are prepared by plasma deposition technique, keeping different hydrogen to methane ratio during the growth process. The hydrogen concentration, sp$^3$ content, hardness and optical Tauc gap of the materials have been estimated from a detail analysis of their Raman spectra. We have also measured the same parameters of the films by using other commonly used techniques, like sp$^3$ content in films by x-ray photoelectron spectroscopy, their Tauc gap by ellipsometric measurements and hardness by micro-hardness testing. The reasons for the mismatch between the characteristics of the films, as obtained by Raman measurements and by the above mentioned techniques, have been discussed. We emphasize on the importance of the visible Raman spectroscopy in reliably predicting the above key properties of DLC films.Comment: 19 pages, 8 figure

Small crack formation in a low carbon steel with banded ferrite–pearlite structure

The phenomenon of the formation of small cracks in a banded plain carbon steel has been studied on dumble-shaped plate type specimens under varied cyclic stress amplitudes at the load ratio of R = 0. The locations at which the cracks were found to nucleate could be classified as: (i) ferrite–pearlite interface (FPI), (ii) ferrite–ferrite grain boundary (FFGB), (iii) ferrite grain body, and (iv) inclusion–matrix interface. The most preferred site for such crack nucleation in the investigated steel was found to be the ferrite–pearlite interface. The orientation of the initiated small cracks was found to vary widely between 0° and 90° with respect to the loading direction unlike some earlier reported results. It is reported here for the first time that the angle between the direction of banding and the loading axis has pronounced effect on the orientation of such small cracks. The lengths of these cracks at FPI and FFGB are found to be larger than the ones nucleated inside ferrite grain body. The preferred site of crack nucleation and the influence of the banding on the size and the orientation of the small cracks have been explained using inhomogeneous distribution of stress/strain in the microstructure and incompatible strains along the interfaces

Floating Spherical Gaussian Orbital (FSGO) Studies with a Model Potential: Methane, Silane & Germane

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