In a multi-tasking data processing system, each task may request that the operating system set up descriptor blocks which identify virtual screens for display of data on the video display. Under keyboard control, only one virtual screen is selected for display at a given time. The operating system reserves a portion of the video display for displaying identifiers of the virtual screens which have been established but which are held in background. Each virtual screen may be subdivided into viewports by the corresponding application task. Those viewports are also identified in the operating system by descriptor blocks which point to pages of data in the document files. The descriptor blocks can be modified through requests from application tasks even when held in background. Whenever the display memory is updated, data designated by the descriptor blocks is passed through a rasterizer in the operating system which generates the pixel data to be stored in a display memory.

Screen manager for data processing system

Unanchored fluid storage tanks rely primarily on the weight of fluid resting on an uplifted portion of the base plate to balance seismically induced overturning moments. Local uplift is therefore necessary to develop the resisting moment. This has often resulted in buckling and other damage. These problems are reduced or eliminated by inserting a ring filler under the tank wall, so that the base plate is partly preuplifted. The weight of fluid resting on the preuplifted portion of the base plate can contribute to the resisting moment without any additional uplift of the tank wall. It is shown by static analysis and by experiment that preuplift significantly improves the lateral load capacity of unanchored tanks.

Preuplift technique of anchoring a cylindrical liquid storage tank for lateral loading

The present invention provides: a vegetation sheet whereby it becomes possible to prevent the drop of an content, e.g., seeds, from the vegetation sheet and which can have blocking resistance even when stored in the form of a roll for a long period; and a water-soluble resin film which is suitable for the production of the vegetation sheet. The present invention specifically provides a water-soluble multi-layer film composed of two layers, i.e., a layer (1) and a layer (2), said multi-layer film being characterized in that the layer (1) has a time required for complete dissolution thereof (a water dissolution time) of 90 seconds or longer and the layer (2) has a water dissolution time as mentioned above of shorter than 90 seconds as measured by subjecting the film to a water solubility test (A).

Water-soluble multilayer film, and vegetation sheet produced using same

PROBLEM TO BE SOLVED: To provide a sound insulation device capable of reducing not only vehicle lower-part noise generated by a rail as a sound source and vehicle lower-part noise generated by a sound source above the rail.SOLUTION: When vehicle lower-part noise Sis radiated toward a side face sound absorption part 16A of a sound absorber 17B, the vehicle lower-part noise Sis absorbed by the sound absorber 17B of a sound insulation device 14. When vehicle lower-part noise Sis radiated toward upper-surface sound absorption parts 16B of sound absorbers 17A, 17B, the vehicle lower-part noise Sis absorbed by the sound absorbers 17A, 17B of the sound insulation device 14. When vehicle lower-part noise Swhich is not absorbed by the sound absorber 17B passes through a through hole 18e of a sound insulation plate 18a of a sound shield material 18A, the vehicle lower-part noise Sis absorbed by the sound absorber 17A. The vehicle lower-part noise Swhich is not absorbed by the sound absorber 17B is cut off by the sound insulation plate 18b, which thereby prevents the vehicle lower-part noise Sfrom being radiated to the outside from the sound insulation device 14.

Sound insulation device

A sound absorbing plate for a railway using lightweight aggregate is provided to make construction simple, to secure convenience at maintenance work, to secure sound absorbing effect in various frequency bands and to keep sufficient durability. A sound absorbing plate(1) for a railway using lightweight aggregate(2) is formed in the type of a rectangular flat plate placed between two rails of a railway and the outside of a rail and provided with grooves(3) and projections(4) formed regularly or irregularly in the longitudinal direction or the widthwise direction to maximize the cross sectional surface area, and manufactured in the length(L) enough to be inserted between two rails of a railway, the width(H) enough to be inserted between adjacent sleepers and the thickness(T1) of 80~190mm by mixing cement with lightweight aggregate(2) having a diameter of 1.5~6mm in a volume ratio of 4 to 1, inputting 25 and below percent of water based on weight ratio of mixed aggregate and 3~4% compound based on weight of water, and then supplying the mixture to a mold and setting up a vibration for appointed hours using a vibrator to form gaps between particles as many as possible and to keep sufficient strength and stripping off the mold, and curing the shock absorbing plate at 20~45°C in a curing chamber. In addition, sound absorbing holes(5) are formed to grooves and projections of the shock absorbing plate to increase the cross sectional surface area, and second sound absorbing holes are formed to the inside of the shock absorbing holes to increase the cross sectional surface area and to maximize sound absorbing effect of various frequency bands.

Noise absorbing plate for rails using light weight aggregate

PURPOSE:Devised is the construction of the coupling section of a tank which has the characteristic of a high safety factor and is easily assembled The device is capable of allevating the secondary bending stress in the interlocking section of a tank, and solving the deformation of an annular plate which is caused by the welding strain whose welding joint from is changed from fillet welding joint to butt welding joint

Construction of interlocking section of base plate and side plate used for a flattbottomed cylinderical tank

PURPOSE:The joining method at fixed roof cylindrical tank to fix the roof temporarily only by inserting key coupling into clamping member attached oto knuckle plate without any temporarily fixing tool when installing

Joining method of knuckle plate and root at fixed roof cylindrical tank

PURPOSE:To make a bottom heat insulator fracture-resistive when a double shell low temperature tank is cooled down and or at its normal operation.

Bottom structure of a double shell low temperatine tank

PURPOSE:To reduce deformation due to circumferential force and prevent destruction and improve the anti-earthquake stregnth of a tank, by fixing an annular beam for reinforcing annular plates and thus increasing the moment of inertial of circumferential cross section of the annular plate.

Flattbottom cylindrical tank

PURPOSE:Cost saving structure in which both a shrinkage in bending by heat when the structure is cooled down and a bending by hydraulic load are prevented by making the cold retaining bottom structure of dual shell low temperature tank to a multiple structure of a cold retaining slice material without having shift and a resistance against the heat shock may be improved.

Hasegawa Tsutomu

Papers

Construction of interlocking section of base plate and side plate used for a flattbottomed cylinderical tank

Joining method of knuckle plate and root at fixed roof cylindrical tank

Bottom structure of a double shell low temperatine tank

Flattbottom cylindrical tank

Cold retaining bottom structure of double shell low temperature tank