Multiresolution coding techniques for digital television: A review

Multiresolution decompositions for video coding are reviewed. Both nonrecursive and recursive coding schemes are considered. In nonrecursive schemes, it is shown that pyramid structures have certain advantages over subband or wavelet techniques, and a specific spatiotemporal pyramid coding of HDTV is discussed in some detail. It is shown that recursive, DPCM like schemes will incur a slight loss of optimality due to a restricted form of prediction if multiresolution decomposition with compatible decoding is required. Compatibility and transmission issues are also discussed. Multiresolution transmission for digital broadcast TV is introduced. This, when combined with multiresolution source coding, achieves spectrum efficiency, robustness and graceful degradation under channel impairments.Invited PaperWork supported in part by the National Science Foundation under grants ECD-88-11111, MIP-90-14189 and Bell Communications Research.Work supported by the National Science Foundation under grants ECD-88-11111. K.M. Uz is now with David Sarnoff Research Center in Princeton, NJ 08543.     

The development of technology for making SvAK12 welding wire from shaving billet

A technology for making a welding wire with a diameter of 1.2 and 2.0 mm from the shavings of SvAK12 aluminum alloy is developed. This technology includes hot briquetting the graded shaving scrap at 400–420°C, the hot extrusion of briquettes at 460–470°C with elongation factors of 32 and 56, cold wire drawing the extruded bars with average unit reductions for a pass of 15–20%, and intermediate annealings at 400°C. It is shown that this wire is suitable for soldering parts of aluminum alloys, and the level of the mechanical properties allows it to be recommended for wide application.     

Computational-and-experimental evaluation of the implementation condition of combined rolling–pressing using the power balance method

The results of solving the problem of determining the implementation of combined rolling–pressing (CRP) are presented. Components of the total power for the process under study are written in the analytical form, they are calculated with the help of the computer program, and the influence of separate factors on the CRP implementation is analyzed. The possibility of implementing the process for CRP conditions of aluminum alloys with the use of a pilot installation of the combined treatment is evaluated quantitatively using the capacity reserve coefficient as the main criterion.     

Treatment of linea alba hernia and diastasis of rectus abdominis

The asynchronous development of structural and metabolic disorders of aponeurosis, leading to the development of defects in sheath of the rectus abdominis is the major factor of hernia of linea alba formation. Development of diastasis of m. rectus abdominis is caused by primary structural and metabolic changes of myocytes caused by the extreme overload. The important factor of the operation is restoration of anatomic and physiologic parameters of the abdominal wall by bringing mm. rectus abdominis together, shortening and enforsing of aponeurosis makes it possible to distribute regularly the load on the aponeurotic sheath of musculi recti.     

Approval of a Method for Processing Aluminum Alloy Waste Cans Using a Combined Rolling and Pressing Method

Metallurgist - Results of experiments for processing waste cans of aluminum alloy of the 3000 series are presented. Methods of cold briquetting and establishment of combined rolling and pressing...     

Alternative Technology for Manufacturing Rod–Wire Products from AK12 Silumin

Metallurgist - We develop and test a flow diagram of the process of manufacturing of rods and wires from graded loose chip wastes of eutectic silumin based on the use solely of the procedures of...     

Calculation of maximum ice jam levels

Conclusions To successfully counter ice jams, it is necessary to make accurate predictions of the maximum ice jam levels and the length of the ice jam. The method of P. N. Belokon' [3] for constructing the winter head curves can not only be used to calculate the maximum ice jam levels in the formation zone, but also can be extended to the more general case in which the length of the ice jam far exceeds the boundaries of the head curve. In this case the calculation is based on Eqs. (1) and (2). Translated from Gidrotekhnicheskoe Stroitel'stvo, No. 10, pp. 47–48, October, 1972.