Abstract: The cache reload time in small computer systems is improved by using a distributed cache located on the memory chips. The large bandwidth between the main memory and cache is the usual on-chip interconnecting lines which avoids pin input/output problems. This distributed cache is achieved by the use of communicating random access memory chips of the type incorporating a primary port (10) and a secondary port (14). Ideally, the primary and secondary ports can run totally independently of each other. The primary port functions as in a typical dynamic random access memory and is the usual input/output path for the memory chips. The secondary port, which provides the distributed cache, makes use of a separate master/slave row buffer (15) which is normally isolated from the sense amplifier/latches. Once this master/slave row buffer is loaded, it can be accessed very fast, and the large bandwidth between the main memory array and the on-chip row buffer provides a very fast reload time for a cache miss.

Abstract: A display workstation comprising a display monitor including an image display device mounted on a base by a mechanism permitting adjustment of the angle of tilt of the image display device, the tilt mechanism including a pair of support members upstanding from the base and providing a gap between the display device and the base between the support members. A cable connector housing is releasably retained in the gap between the support members. Individual cables from peripheral input devices extend to the front of and are releasably coupled to the housing, and a further cable is also coupled to the housing and extends from the rear thereof to a separate display control unit. The housing contains circuits providing electrical connection between the peripheral device cables and the control unit cable.

Abstract: A method for expanding a binary image includes the steps of: storing the image in bit sequence; inserting for each string of 5 bits along a first axis one or more expansion bits, to convert each said string of 5 bits to a string of 6 bits; assigning a value to each expansion bit generated by the above step; inserting one or more rows of expansion bits for each 5 rows of bits along a second axis of the image to convert each 5 rows of bits to 6 rows of bits along the second axis of the image; assigning a value to each expansion bit generated by the above steps; storing the enlarged image generated by the above steps.

Abstract: Electroerosion recording materials are provided with a surface lubricant film of particulate lubricating nonconductive graphite fluoride and optional conductive materials in a polymeric binder. The lubricating agents reduce stylus scratching of the conductive layer during electroerosion printing, improve contrast, provide a beneficial coating on the writing electrode or stylus and improve the handling and writing characteristics of the recording material. The lubricating agents/polymer films are especially useful (1) where the substrate of the recording material is light transmissive and, after the electroerosion process, the resulting product is suitable for direct-negative applications and (2) where direct offset masters are produced by removal of noneroded lubricant film.

Abstract: A method and an apparatus are disclosed for converting error syndromes of an error-correcting code to pointers which identify the positions of the erroneous bits. Each syndrome is converted by a plurality of hashing functions into a plurality of hash words, which in turn are used to address a plurality of read-only stores. The outputs of the read-only stores are logically combined to obtain the respective error pointer. A preferred embodiment uses three hashing functions (41, 43, 45) and three read-only stores (53, 55, 57) and combines their outputs by an Exclusive-Or function (59). The storage capacity and the processing time required for syndrome-to-error pointer conversion are reduced by the disclosed scheme.

Abstract: Graphics images are generally considered to be those images comprised of text and/or line drawings. Data compression of graphics images is desired whenever a fast image transmission speed is desired in a limited band width channel. It is also used for storage of a large number of images in a limited capacity storage system. The method and apparatus described herein improves data compression, resolution and coding efficiency by eliminating transitions between gray levels at edges in an image, converting all gray levels to a common value to achieve a 3 level representation of a graphics image, and reversibly converting the 3 level representation to a bilevel double resolution representation by increasing the data sampling rate and therefore allowing the use of two level data compression techniques. A high resolution display or printed output may be obtained from the bilevel multiresolution representation.

Abstract: Electroerosion recording materials of superior scratch resistance are provided without the need for a lubricant overcoat by incorporating a hard, lubricating hydrophobic polymer layer between the support and the removable, thin conductive layer to reduce plastic deformation of the support under stylus writing pressure. The intermediate polymer layer provides a highly adhering surface for the overlying aluminum film and contains graphite fluoride and/or fluorocarbon resins such as Teflon.RTM. and hard particles such as silica. The materials may be used in various printing processes including making directly readable images, direct negatives and wear resistant offset printing masters.

Abstract: The overall arrangement of a number of non-overlapping rectangles with constraints on their size and shape, may be generated with relation to a number of objective functions such as, size and shape of the enveloping rectangle, size of an interconnecting network, and distance between pairs of individual rectangles, by first embedding a distance space, reflecting the desired proximity structure, in the plane; next, by refining containment relations, fixing the relative positions of rectangles within such a containment in accordance with the corresponding positions in the embedding; and on the basis thereof estimating the space required for the local realization of the interconnecting network in a configuration satisfying the constraints on the individual rectangles, and optimal with respect to any quasi-concave objective function on the dimensions of the enveloping rectangle that is monotone in its arguments. The method can be implemented even on relatively small computers.

Abstract: Graphic images are generally considered to be those images comprised of text and/or drawings. Data compression of graphics images is desired whenever a fast image transmission speed is desired in a limited band width channel. It is also used for storage of a large number of images in a limited capacity storage system. A high compression ratio is achieved by thresholding the graphics image to a bilevel black-white image at one bit per pixel and then employing a second data compression on the black-white image. At low resolution, bilevel images have poor quality at edges and a quality improvement is needed. The data compression apparatus and method disclosed separates the graphics image into at least first and second bit planes identifies edge pixels from the first bit plane indicating a black/white change, locates the edge pixels and generates at least a single bit for each edge pixel indicating whether the edge pixel has a maximum intensity value such as black or white or an intermediate gray intensity value.

Abstract: In a red-emitting phosphor which includes ZnSe as a host material, copper (Cu) as an activator and aluminum (Al) as a coactivator, the improvement comprising the inclusion of a small amount of cobalt (Co) to provide superlinear characteristics to said phosphor in combination with said Cu and Al. A preferred range of concentration of said Co is 10.sup.-6 -2.times.10.sup.-5 g atom/mol. A specific application of said red-emitting superlinear phosphor is as a phosphor screen for a current density sensitive, single gun color CRT, when mixed with a green-emitting sublinear phosphor.

Abstract: Apparatus and method are described for filtering noise from digital video images including means for determining first difference values between intensity values of current pel and one or more preceding pels, means for determining second difference values between intensity values of the current pel and one or more succeeding pels, means for limiting any of the first and second difference values that exceed a predetermined limit value, and means for generating a filtered value for the current pel by adding the intensity value of the pel to a scale summation of the limited first and second difference values.

Abstract: A flat storage cathode ray tube with enhanced brightness is described. A mesh collector and a dielectric storage site array form an integral part of a silicon wafer. The silicon wafer includes thereon an addressable array of field effect transistors having a field effect transistor associated with a dielectric storage site in the storage site array for controlling a writing of the dielectric storage site. The addressable array of transistors works in cooperation with a flooding electron gun to effect selective writing of the storage site array. The enhanced brightness cathode ray tube may be adapted for use in a projection display.

Abstract: An electrolytic display device, specifically an electrochromic display based on viologen, employs metal ions in solution to catalyse the reduction of display material at the display electrodes. The metal ions are deposited faster than the display material and subsequently chemically reduce this material. Thallium (I) as the metal catalyst in combination with an oxy-anion of phosphorus accelerates the display reaction without causing undesired precipitation from the solution. Cadmium (II) in combination with sulphate anions is also an effective catalyst. Either a greater amount of display material may be deposited than without the catalyst or the same amount deposited in a shorter time.

Abstract: In an image processing system, a method is shown for efficiently transmitting data representing picture information in fields subsequent to a first field and for suppressing motion induced flicker in the processed image. Using previously processed first field data which is used to predict values for picture elements in subsequent fields, a gradient value is calculated which indicates relative picture activity. A difference value for the picture elements in the subsequent fields is calculated and is limited in magnitude by the gradient value for each picture element. The limited difference value is encoded as a function of previous difference value and transmitted to a remote location for decoding and picture reconstruction and display.

Abstract: An associative file design method and apparatus are used for automatically generating an integrated data base design structure, with minimal data redundancy, for use in multi-application general purpose digital computing systems. The integrated data base design structure is automatically produced by a programmed digital computer in the form of a report or graph structure which permits the data base designer to design a data base system with minimal data redundancy. The data needed by each application program, i.e., the local data view, is specified with certain constructs. The local data views are checked to ensure that specified rules are followed. The collection of local views is processed on a general purpose digital computer to separate "keys" from "attributes," then to determine "implied" and "essential" associations, and finally to generate the integrated data base graph structure.

Abstract: A chimney cleaning system which can be operated from the ground and which does not require the user to climb a ladder to the top of the chimney includes a cleaning head constructed of a number of sections of iron or like material connected together by support members of length appropriate to the particular interior dimensions of the chimney to be cleaned and suspended by a chain or cable from a tubular support member which is adapted to align the cleaning head within the chimney or flue and to provide a guide for the cable to the ground for ready access by the user without the need for pulleys. An anti-down draft cap may be mounted at the end of the tubular support member immediately above the chimney opening to enhance the operation of the chimney system. The anti-down draft cap mounts to a support means on the end of the tubular support member. The tubular support member is mounted to the outside of the chimney by stainless steel bands or the like.

Abstract: A pad of closed cell foam rubber material or the like is fixed to a golf club grip in a position to be held by the lower hand. The pad is adapted to absorb energy from the lower hand during a golf swing to prevent overpowering of the club by the lower hand. The pad includes a layer of closed cell foam rubber and a pressure sensitive adhesive to afix the pad to the golf club grip.

Abstract: A system for encoding images by assigning variable-length code words to fixed positions in a dynamic stack. Each position in the dynamic stack is occupied by a representation of an encodable image feature, such as a run-length or a vertical correlation. These codes are arranged in order of their respective frequencies of occurrence. The order in which these features are stacked is varied dynamically by the system, in accordance with their respective frequencies of occurrence and a predetermined scheme. Thus, the system can adapt to different types of documents being scanned, or to changes of scanning resolution. A relationship exists between the code words and the stack positions, which are not permanently assigned to specific image features. This arrangement ensures that the lengths of code words will be inversely related to their frequencies of occurrence under all conditions.

Abstract: An archery bow has a frame rearwardly extending mounted on the bow. The frame is adjustable to meet the requirements of the arm length of the user. The frame is generally U-shaped having first and second mounting points on the bow above and below the point at which the forward hand supports the bow and where the forward portion of the arrow rests. The rearward portion of the frame rests against the user's chest or shoulder or whatever other part of the user's body which the user chooses to employ as a rear anchor point. An adjustable bar is moveably mounted on the frame member being slideably mounted having holes in the upper and lower portion of the adjustable bar so that it may be moved along the arms of the frame. Structure for fixing the adjustable bar in a desired location on the frame is included. Such structure may be set screws or the like. The adjustable bar includes a hand grip for the rear hand of the user and an arrow stop for precisely positioning the arrow in a repeatable manner.