Growth conditions of the cubic phase cBN in boron nitride films

The nucleation and the subsequent coalescence period of the cubic phase cBN in sputter deposited BN-films is characterized by a shrinking of the film thickness. This is due to the transition of hBN into the denser cBN-phase which occurs inside a highly textured hBN base layer. The corresponding variation of the film thickness with the deposition time is described by a quantitative model. Full BN-stoichiometry in the hBN base layer is shown to be a mandatory condition for the nucleation process and the following growth of the cubic BN-phase. An increase of the substrate temperature fosters the incorporation of nitrogen into the growing film and, thus, the achievement of the stoichiometry condition.     

Obituary: Julius Segal (1924–1994).

Memoralizes the life of J. Segal who authored and co-authored 8 books and approximately 500 articles, chapters, and magazine and newspaper features in the field of behavioral science and mental health. Shortly before his death, he co-authored the 8th edition of the widely used textbood, Psychology: An Introduction . Segal was the 1st psychologist to receive the American Psychological Foundation's Science Writer's Award. In the areas of stress and coping, Segal conducted the Department of Defense's official study of the American soldier who had been brainwashed during the Korean War. Segal is noted for possessing the rare capacity to present complex scientific and professional issues in understandable language, and his writing style was graceful, felicitious, and engaging. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Lösungseigenschaften eines Segmentpolyurethans auf Polybutylenadipatbasis

The behaviour of diluted solutions of polyurethanes based on polybutyleneadipate of various molecular mass is described, particularly with regard to viscosimetric properties, fractionation, distribution analysis and some thermodynamic parameters.     

Hydrolysis of aromatic sulphonic acids in industrial effluents. I. Hydrolysis of 7-hydroxy-2-naphthalenesulphonic acid

The protodesulphonation of 7-hydroxy-2-naphthalenesulphonic acid (F-acid) was investigated in dilute aqueous sulphuric acid at temperatures of 522–553 K. The hydrolysis of the sulpho group is irreversible and F-acid can be completely converted into 2-naphthol in a short time. The hydrolysis rate depends strongly on the temperature and on the sulphuric acid concentration; a rate equation was derived from the experimental data.     

Line Clipping Using Semi-Homogeneous Coordinates

The dual intersection test is described. It is a new method for deciding whether a line intersects a window. The concept of semi-homogeneous coordinates is introduced. It allows us to define line segments in projective space, and to derive a generalized Cohen-Sutherland end-point test for such segments. When this is combined with the dual intersection test, we obtain new clipping algorithms for 2D and 3D projective space.     

The atmospheric water vapor continuum below 300 GHz

Absolute attenuation rates due to water vapor and moist nitrogen have been measured in the laboratory at 138 GHz, 282 and 300 K, pressures up to 1.5 atm, and relative humidities from 80 to 100 percent. The computer-controlled measuring system is comprised of a millimeter wave resonance spectrometer (0.15 km effective path length) and a humidity simulator. Several shortcomings of earlier measurement attempts have been rectified. The data are interpreted as a water vapor continuum spectrum consisting of two terms, namely strong self-broadening (H₂O?H₂O) plus foreign-gas-broadening (H₂O?N₂) contributions. Implications of the new results for modeling atmospheric EHF window transparencies and for revising established H₂O line broadening theory are discussed.     

On the ferrite-austenite equilibrium in the Fe-Cu system

The thermodynamics of ferrite containing dissolved copper is analyzed theoretically, taking into account the effect of copper on the Curie temperature. By combination with experimental information on the solubility of copper in austenite, this model is used to predict the solubility of copper in ferrite. The result shows good agreement with experimental data but indicates that the data should be extrapolated in a manner different from that which has been previously suggested. The effects of copper and cobalt on the relative stability of the α and γ phases in iron-rich alloys are compared. It is concluded that their difference is mainly caused by the difference in their effects on the Curie temperature of α-iron.